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Some synthetic drugs are usually crystallized in organic solvents and contain a considerable amount of organic solvents. If these organic solvents are directly discharged into the atmosphere, they will seriously pollute the environment and cause energy waste. Drying and recycling various solvents for reuse are not only in line with the requirements of environmental protection, but also the requirements of the company's own development. Therefore, for the drying of these drugs and APIs, it is more appropriate to choose a closed-circuit drying system, which can effectively achieve economical, Effective unification of environmental and social benefits. In recent years, when drying anaerobic materials or materials containing flammable and explosive organic solvents, and the organic solvents can be recycled and cannot be discharged into the atmosphere, closed-circuit dryers are generally used for drying of these special materials. , using nitrogen as the drying medium, the nitrogen is heated and circulated in the drying system, the nitrogen in the circulating flow process takes out the organic solvent in the material, and the gaseous organic solvent is condensed into a liquid state by the condenser in the drying system, and It is recycled by the recycling system to achieve the purpose of drying the material. At the same time, due to the injection of nitrogen in the drying system, the oxygen content is reduced. When the oxygen content is reduced to the specified value, anaerobic materials can also be safely dried. Based on these advantages, this vertical closed-circuit dryer is currently in comparison. Special pharmaceutical products, chemical products and other industries are widely used. In the process of use, there are also some prominent problems. In response to these problems, After many technical and process demonstrations, our company has summarized the following problems and proposed solutions Problem 1: The dust removal method of closed-circuit drying equipment is not environmentally friendly For the dust removal method of closed-circuit drying equipment currently used by many pharmaceutical companies, pulse backflushing is mainly used for dust removal, some materials will adhere to the surface of the filter cartridge. In order to make the material on the surface of the filter cartridge fall off, the backflushing system needs to backflush the inner wall of the filter cartridge, and the gas used for backflushing is nitrogen. Backflushing into the equipment system causes the positive pressure in the system to increase rapidly and the oxygen content to decrease. When the positive pressure in the system reaches a certain level, the automatic pressure relief port begins to release pressure, and the frequency of pressure relief is very fast. During the pressure relief process The nitrogen and the organic solvent in the nitrogen will be released from the pressure relief port, which will consume a large amount of nitrogen, and the recovery of the organic solvent will be much less. Problem 2: The surface area of the filter cartridge affects the production efficiency In the process of backflushing and dust removal, due to the relatively large surface area of the filter cartridge, the pressure and flow of backflushing nitrogen are not enough to blow back all the materials attached to the surface of the filter cartridge, so that the material on the surface of the filter cartridge will accumulate more and more. The resistance on the surface of the filter cartridge will become larger and larger, resulting in poor material boiling state, or even no boiling, which seriously affects the production efficiency and product yield. Problem solving Based on the problems raised above, combined with the specific production process of the user's materials, the process flow 2 shown in Figure 2 is a good solution. Its main process principle is the same as process one, using the traditional air cylinder shaking bag dust removal method, combined with the structural characteristics of the closed-circuit drying equipment system with high airtightness requirements, the dust removal cloth bag is made of smooth anti-static cloth with good air permeability. The cylinder adopts a double-stroke cylinder structure. The long stroke is used for disassembling and assembling the cloth bag or for maintenance and repair, and the short stroke is used for the up and down shaking of the cloth bag. Because the cloth bag shakes up and down under the action of the cylinder, the material attached to the surface of the cloth bag is easily shaken off, and the cylinder is shaken up and down using compressed air, which has nothing to do with the mixture of nitrogen and air circulating in the system. It saves a lot of nitrogen, and the pressure in the system will not increase frequently and is automatically released to the atmosphere, which is conducive to the requirements of environmental protection, and is also conducive to the complete recovery of organic solvents in materials, and also greatly improves production efficiency. Comparison of advantages and disadvantages of new and old processes Compared with the first process, the main advantages of the second process are as follows: ① It can recover the organic solvent better and more effectively, and reduce the production cost; ② It can save a lot of nitrogen; ③ It can better shake the bag for dust removal and improve the production efficiency; ④ It can better Avoid the pollution of organic solvents to the environment; ⑤ The operation procedure is simpler, more convenient and easier to maintain. The main disadvantage is that the height of the user's room is higher, or the user is required to open a hole on the ceiling (top plate) of the room to facilitate the installation of the double-stroke cylinder.

Nitrogen filling and oxygen removal process Close the corresponding pipeline control valve, the system is in a completely closed state, open the air exhaust pump, and pump out the air in the system, so that the system reaches a micro-negative pressure state, when the system pressure gauge shows a certain value, close the corresponding emptying valve, and at the same time Turn off the exhaust air pump. At this time, the nitrogen filling control valve is opened, and nitrogen is filled into the system. When the online oxygen detection device detects that the residual oxygen in the system is less than the required value, the system is in a slightly positive pressure state. At this time, the nitrogen filling control valve is closed and the next step is entered. process. Drying process Turn on the circulating fan to make the material in a good boiling state; turn on the radiator to heat the temperature in the system to the required temperature, and the heat will take away the moisture and organic solvent in the material through nitrogen transfer, and take away a small amount of fine powder; in the system, the fine powder is passed through the dust collector. (filtered to 2~μm) and collected, the hot and humid gas condenses the solvent and organic solvent into a liquid state by the condenser and is collected by the liquid storage tank; the dry nitrogen after condensation and dehumidification is circulated in the system through the action of the fan. System nitrogen protection Nitrogen protection is mainly controlled by an online oxygen detector. When the oxygen content exceeds the required value, the nitrogen filling device is automatically opened and nitrogen is filled into the system. When the oxygen content in the system meets the requirements, the nitrogen filling device is automatically closed. System overvoltage protection When the pressure in the system exceeds the set value, the pressure detection device will act to automatically drain and release the pressure; when the system pressure meets the requirements, the automatic drain valve will be closed and the system will operate normally. Practical application analysis 1) The laboratory vertical closed-circuit dryer (model FGBX-5) has been rectified according to the structure in Figure 2 and can be put into use. 2) Prepare 5 kg of starch material containing about 30% ethanol for use. 3) After the equipment is completely sealed, start the air exhaust pump to pump out the air in the system. After the system reaches a certain negative pressure value, turn off the air exhaust pump, open the filling nitrogen valve at the same time, and input nitrogen into the system. When the pressure is positive and the oxygen content in the system reaches a certain requirement, close the valve for filling nitrogen; during this process, if the system is in a state of slight positive pressure, but the oxygen content has not yet reached the standard, nitrogen should continue to be filled into the system. When the positive pressure in the system exceeds the safe set pressure of the automatic pressure relief valve on the equipment, the automatic pressure relief valve will open to release the pressure. When the pressure is released, the mixed gas of nitrogen and air in the system will be discharged, and the oxygen content in the system will continue. When the pressure in the system reaches the safe set value, the automatic pressure relief valve will automatically close, and this cycle will continue until the oxygen content in the system reaches the set value. 4) Start the condensation recovery device, and inject the chilled water of about 3° into the chilled water inlet of the condenser. Then start the closed induced draft fan and set the fan frequency to about 20 Hz. 5) Using the material level difference and the principle of double butterfly valve, the material is put into the system which is mainly nitrogen circulation. 6) Start the steam heater and control the inlet air temperature at about 60°. 7) The material is in a boiling state during the nitrogen circulation movement. The organic solvent ethanol and a small amount of water in the material are taken out by nitrogen and condensed into a liquid state by the condenser and flow into the recovery box. The dust removal bag is shaken up and down under the action of the shaking bag cylinder, and the material attached to the bag is shaken into the silo to continue drying. Without any other gas entering the system, the micro-positive pressure state in the system will not be very fast. Increase and open the automatic pressure relief device, the mixed gas of nitrogen and organic solvent will not be discharged from the system frequently, so that the nitrogen content in the system is stable, nitrogen will not be replenished into the system frequently, and the organic solvent will not be discharged. It pollutes the environment and is conducive to the recovery of organic solvents in good condition. If the process shown in Figure 1 is used, due to the pulse backflushing method used in the dust removal system of the upper cylinder during the drying process, a certain pressure of nitrogen must be used for each backflushing, so that the pressure in the system will increase rapidly and the pressure will be automatically released. The valve will be opened frequently to release pressure, which will take away a large amount of nitrogen and organic solvents, which will not only pollute the environment, consume a large amount of nitrogen, but also have a very low recovery rate of organic solvents. At the same time, in the drying process, since the system only needs a slight positive pressure during operation, the required air volume is small, which can not only reduce the boiling height of the material, but also make it difficult for the material dust to come into contact with the dust removal bag of the upper cylinder, which will reduce the cloth The bag resistance will also improve the yield of materials, and the frequency of the induced draft fan can also be reduced, saving energy consumption and reducing noise. 8) After the material is dried for 10 minutes, take samples through the sampler to confirm that the product has met the requirements. 9) The weighing result of the product after drying shows that the starch material is 3.45 kg, and the ethanol in the recovery box of the condensation recovery device is 1.4 kg. meet the experimental requirements.

The project with an annual output of 100,000 tons of hydrosulfite is under construction. The total investment of the project is 700 million yuan, covering an area of more than 150,000 square meters. A new 100,000-ton hydrosulfite production line will be built, which will jointly produce 60,000 tons of sodium metabisulfite, and by-products such as sodium sulfite and carbon dioxide. Project overview The construction of workshops for synthesis, drying and neutralization has been completed The tank farm is basically completed Sulfur dioxide plant Synthesis section mother liquor tank group Outdoor facilities in the synthesis section Methanol rectification tower facility in neutralization section The main body of the reactor in the synthesis workshop has been installed The main body of the dryer in the drying workshop is installed

According to different material characteristics, drying each material requires different types of Drying Equipment. Griffin Drying summarizes the dryers used for many materials based on years of design and manufacturing experience, for the reference of customers and brother companies. In order to facilitate the selection of equipment, the details are as follows: Centrifugal Spray Dryer: alumina, bentonite, beryllium oxide, calcium carbide, silicon carbide, cement, electric porcelain, enamel, ferrite, floor tile material, glass sand, grinding wheel material, insulating material, iron oxide, kaolin, sand, silicon oxide , spark plug material, soapstone, titanate, tungsten carbide, uranium oxide, wall tile material, zinc oxide, zirconium silicide, adipic acid, aluminum formate, aluminum stearate, aminophenol disulfonic acid, aspirin, bismuth Compound, calcium acetate, calcium butyrate, calcium gluconate, calcium lactate, calcium propionate, calcium saccharate, calcium stearate, cellulose acetate, CMC, methylmorphine phosphate, edetate, complex magnesium salt, Glutamic acid, glycerides, glyoxal, lactose, lysine, malic acid, mercaptothiazole suspension, metal stearate, oxalic acid, p-aminosalicylic acid, potassium phthalate, potassium sorbate, Rubber catalyst, salicylic acid, sodium acetate, sodium benzoate, sodium dimethyldithiocarbamate, sodium ethylxanthate, sodium carbonate, sodium sorbite, stearic acid, wax, stearic acid Zinc, acrylonitrile butadiene resin, acrylonitrile butadiene styrene resin, melamine formaldehyde resin, polyoxymethylene, phenol formaldehyde resin, polyacrylate, polyacrylonitrile, polycarbonate, polyethylene, polyaldehyde, polypropylene, Polystyrene, polyvinyl (acetal) aldehyde, polyvinyl alcohol, polyvinyl alcohol butyrate, polyvinyl butyral, polyvinyl chloride emulsion, polyvinyl chloride suspension colloid, impregnated cellulose, styrene acrylonitrile Resin, styrene butadiene resin, urea formaldehyde resin, polyvinyl chloride acetate, polyvinyl alcohol, calcium arsenate, copper oxychloride, cuprous oxide, 2,4-dichloro-phenoxyacetic acid, 2,4- Dichloro-phenoxypropionic acid monomethylamine salt, dichloro-phenoxypropionic acid, dichloro-propionic acid sodium salt, lead arsenate, methyl-chloro-phenoxyacetic acid, methyl-chloro-phenoxyacetic acid sodium Salt, Methyl-chloro-phenoxybutyric acid, sodium salt, methyl-chloro-phenoxypropionic acid, sodium-aluminum-fluoride, sodium-methyl-arsenate, sodium-penta-chlorophenolic, sulfurized colloid, Zinc-diethyl-dithiocarbamate, zinc-dimethyl-dithiocarbamate, herbicides, insecticides, fungicides, maize, glucose, gum arabic, lactose, fructose, Sorbitol, Starch, Whole Sugar, Wheat Flour, Vitamin A, Vitamin E, Amthiazole, Rutin Derivatives, Amylase, Calcium Lactate, Calcium Pantothenate, Succinomycin, Dextran, Hormones, Iron Dextran, L-Lysine Amino acids, vitamins, antibiotics, enzymes, dextrins, baby food, yogurt, casein, caseinate, cheese, sugar, coconut milk, fresh cream, eggs: egg whites, egg yolks, whole eggs, ice cream mixes, milk substitutes , dairy blends, skim milk, whey, whey mother liquor, whole milk, artichokes, cake mix, chrysanthemum tea, coconut mix, caffeine, caffeine substitute, decaffeinated caffeine, fat-laden flour mix, Condiments, Juices with Adulteration, Garlic, Rose Juice, Licorice Cream, Malt Extract, Milk Coffee Blend, Paprika, Vegetable Protein, Hydrolyzed Protein, Rennin, Soup Blend, Tea Essence, Tomato, Mycelium Vitamin B12, Niacin, Protease, Hydrolyzed Protein, Sorbitol, Valerian, Soluble Fish Meal, Fish Paste, Fish Protein quality, aluminum chloride, aluminum hydroxide, aluminum phosphate, aluminum silicate, aluminum sulfate, ammonium chloride, ammonium molybdate, ammonium nitrate, ammonium phosphate, ammonium sulfate, ANC catalyst, antimony sulfide, arsenic oxide, barium chloride, Barium hydroxide, barium sulfate, bauxite waste liquid, bismuth carbonate, borax, boric acid, calcium carbonate, calcium chloride, calcium hydroxide, calcium phosphate, calcium propionate, calcium silicate, calcium sulfate, catalyst, cement (raw materials), chromium dioxide, chromium sulfate, cobalt sulfide, copper oxychloride, copper sulfate, copper sulfide, cryolite, copper oxide, mortar flotation, graphite, iron oxide, lithium chloride, zinc barium white, aluminum silicate Magnesium, magnesium hydroxide, manganese carbonate, manganese oxide, molybdenum disulfide, nickel carbonate, nickel hydroxide, nickel sulfide, potassium bicarbonate, potassium carbonate, potassium chlorate, magnesium peroxide, potassium nitrate, potassium permanganate, potassium persulfate , potassium phosphate, silica gel, sodium antimonate, sodium bicarbonate, sodium dichromate, sodium chlorate, sodium chromate, sodium cyanide, sodium hydrogen sulfate, sodium hydrogen sulfite, sodium hypochlorite, sodium phosphate, sodium silicate, silicon Sodium aluminate, sodium fluorosilicate, sodium sulfate, sodium trisulfate, thorium carbonate, titanium tetrachloride, uranium dichloride, zinc carbonate, zinc sulfate, streptomycin sulfate, thiazole, tetracycline, ampicillin, Amoxicillin, oxytetracycline, penicillin, ampicillin, etc. Pressure Spray Dryer: milk powder, basic dyes, cadmium sulfide, ceramic color, chrome yellow, copper oxide, fast dye, food color, indigo dye, iron oxide, kaolin, zinc barium white, milorilan, organic pigment, Paint, Phthalocyanine, Titanium Dioxide, Watercolor, Zinc Chromate, Zinc Potassium Chromate, Zinc Tetroxide Chromate, Active Turquoise Blue, Khaki Green B, Brightener, Catalyst, Resin, Synthetic Washing Powder, Grease, Sulfur Ammonium, dyes, dye intermediates, white carbon black, graphite, ammonium phosphate, amino acids and the like, seasonings, proteins, starch, coffee extracts, fish meal, meat extracts, Chinese patent medicines, pesticides, antibiotics, pharmaceutical granules, magnesium oxide , China clay, various metal oxides, dolomite, alumina, ceramic powder, pharmaceuticals, heavy metal superhard steel, fertilizers, granular washing powder, Chinese patent medicines, amino fatty acids, paraffin, glycerin, tallow, etc. Mesh belt Dryer: catalyst, synthetic rubber, propylene fiber, plastic products, dehydrated vegetables, pellet feed, monosodium glutamate, chicken essence, grated coconut, calcium carbonate, white carbon black, medicines, Chinese medicinal materials, dehydrated vegetables, sludge, etc. Rotary flash Dryer: mud treatment agent, calcium citrate, accelerator ZDC, TMTD, cuprous chloride, white carbon black, atrazine, insecticidal mono, insecticidal double, lauric acid, benzoic acid, benzoin Acid, Sodium Oxalate, Cellulose Acetate, Calcium Stearate (Zinc, Barium, Magnesium, Lead, Cadmium), Dibasic Aluminum Phosphite, Tribasic Aluminum Sulfate, Triphenyltin Acetate, Benzoic Acid, Methylcellulose sulfonic acid, bromine acid, DSD acid, 2,4D acid, H acid, J acid, copper sulfate, Bataan, mancozeb, anthraquinone, iron oxide black, indigo, butyric acid, titanium hydroxide, titanium dioxide, Zinc sulfide, intermediates of various azo dyes, phthalocyanine blue, sulfide blue, aluminum chrome yellow, alkaline bright yellow, soybean protein, gelatinized starch, distiller's grains, wheat sugar, wheat starch, magnesium hydroxide, carbonate, sulfuric acid Copper, ferric sulfite heptahydrate, calcium hydrogen phosphate, kaolin, bentonite, diatomite, dolomite, calcium carbonate, aluminum silicate, artificial cryolite, 4A molecular sieve, Y-type rare earth molecular sieve, etc. Air dryer: clay, china clay, magnesium silicate, silica, talc, tantalum ore, zirconia, titanium oxide, polyvinyl chloride, polypropylene, benzoic acid, plastic resin, ASC, benzoic acid, 2,3 acid, ABS resin , Benzopyrazolone, Accelerator M, Accelerator DM, Catalyst, p-aminosalicylic acid, terephthalic acid, diethylanilinium, synthetic resin, calcium sulfonate, polypropylene resin, chlorofuroic acid coffee grounds, Stearates, synthetic resins, polypropylene resins, pesticide additives, kaolin, bentonite, clay, blue BB, iron oxide, phthalocyanine blue, iron red, titanium oxide, iron yellow, silica, calcined gypsum, electrolysis Manganese dioxide, fluorspar, diatomaceous earth, activated clay, rutile titanium dioxide, copper sulfate, aluminum sulfate, sodium sulfate, calcium phosphate, clay cement, spherical clay, aluminum hydroxide, barium hydroxide, washed kaolin, gypsum slurry , lime, carbon black, calcium carbonate slurry, sludge, iron oxide, sludge slurry, potassium dichromate, sodium sulfate, sodium metabisulfite, salt, silica, activated carbon, sodium fluorosilicate, fluorspar, By-products ammonium sulfate, sodium sulfate, sulfide ore, phosphate rock, iron oxide, calcium phosphate, ilmenite, copper ore, calcium carbonate, magnesium sulfate, zirconia, penicillin, chromium oxide, copper oxide, iron red, titanium oxide , iron yellow, meridone, chlortetracycline, sodium pyrosilicate, oral glucose, tetracycline, penicillin, etc. Disc Dryer: chlorouric acid, potassium nitrate, foaming agent, sulfamic acid, diatom powder, artificial emery, soda ash, aluminum hydroxide, melamine, stearate, anthraquinone, nitroanthraquinone, aniline, PC Resin, basic rhizome, ampicillin, Deng salt, L-phenylglycine and intermediates, cefotaxime, ceftriaxone, etc. Fluid Bed dryer: Granulated china clay, hydroquinone, pentaerythritol, potassium tartrate, terephthalic acid, ABS plastic, acrylonitrile, butadiene, styrene terpolymer, latex resin, polystyrene, vinyl , propylene, cellulose derivatives, starch derivatives, soybean products, starch, chicken essence, monosodium glutamate, chicken powder, milk powder, coffee powder, tea powder, yeast, fruit and vegetable powder, ammonium chloride, ammonium nitrate, ammonium sulfate, chloride Calcium, calcium formate, calcium hypochlorite, calcium sulfate, copper sulfate, diammonium phosphate, dicalcium phosphate, potassium carbonate, potassium chlorate, potassium chloride, sodium chloride, potassium nitrate, potassium phosphate, sodium bicarbonate, bromide Sodium, sodium carbonate, sodium chlorate, sodium sulfate, ammonium sulfate, calcium glucose, calcium hypochlorite, etc. Double Cone Rotary Vacuum Dryer: ammonium sulfate, manganese oxide, calcium carbonate, trisodium phosphate, sodium metabisulfite, calcium magnesium phosphate fertilizer, light calcium carbonate, phosphate rock, ammonium sulfate, ammonium nitrate, nitrogen and phosphorus compound fertilizer, phosphate rock, sulfur essence Minerals and calcium carbonate, light calcium carbonate, sodium nitrate, sodium bicarbonate, base zinc, chromium sulfate, blue sulfide, sodium chloride, synthetic resins, crystals of inorganic drugs, phenylacetic acid, mancozeb, kanamycin Monosulfate, powdered inorganic salts, powdered pharmaceuticals, etc. Vacuum rake dryer: sulfur black, indigo, direct black, salicylic acid intermediates, azo dyes, ethyl orthoformate, sodium hydroxymethyl cellulose, various dyes or intermediates, etc. These are the main types of drying equipment and their corresponding material descriptions. There are also a variety of drying equipment that are similar to the above selection based on their working principles, so I will not list them one by one. If you have any questions about the selection of drying equipment, please write to us for consultation. Griffin Drying is a drying equipment manufacturer you can trust.

Vibrating fluidized bed dryers can be said to be widely used. After use, maintenance and maintenance are required, which is beneficial to the longer service life of the linear vibration fluidized bed Dryer and reduces the occurrence of failures. How to maintain the bed dryer on a daily basis? Here we summarize a few for your reference. 1. Regularly clean the main body of the equipment, the auxiliary pipelines and the use site to ensure that they are clean and free of dust, oil, grease and other debris. When cleaning, the power supply of the vibration motor should be cut off. Dry to prevent the bed from rusting. 2. Check the main body of the equipment and the auxiliary pipelines to ensure that the parts are complete and reliable, such as: whether the parts of the vibration motor, the equipment pipes, and the bolts of each connection are complete, check the working condition of the vibration isolation rubber spring, when the vibration isolation spring appears aging turtle When it is cracked or the installation height is lower than 105MM, it should be replaced. The free height error of each group of vibration isolation springs is not more than 3MM, etc. 3. Always check the connecting parts of the equipment and auxiliary keywords to ensure that they are tightened and ensure that the connecting bolts are not loose. 4. Always check the sealing surfaces to ensure that they are tight and leak-free, such as: sealing surfaces of the bed body, sealing surfaces of various pipe fittings, sealing surfaces of bearing glands and other sealing surfaces. 5. Check whether the anticorrosion and thermal insulation measures of equipment and auxiliary pipelines are good. These are some maintenance methods of the linear vibrating Fluidized Bed Dryer, of course, there are more maintenance, some of the above are for reference only, you can choose the appropriate way to maintain.

There may be some common small faults during the use of the linear vibrating fluidized bed Dryer. Generally, how do we find the reasons for these small faults? We can find out through the fault analysis corresponding to the common faults. Causes to find practical solutions. Fault 1: The temperature display is different from the set temperature. There are several reasons for this, mainly including insufficient steam pressure, failure of steam sensor, failure of electric heating heating, failure of temperature sensor, and too large damper of exhaust air duct. Fault 2: The fuselage moves laterally. There may be two reasons for this: the eccentric block of the vibration motor is not synchronized, and the air volume at the feed end is too large. Fault 3: The discharge speed is too fast. The cause may be that the feed end component is too large, or the included angle of the eccentric block of the vibration motor is too small. Fault 4: The discharge speed is too slow. The cause may be that the weight of the discharge end is too large, and the included angle of the eccentric block of the vibration motor is too large. Fault 5: There are large particles at the discharge port of the cyclone dust collector. The cause may be that the air intake is too large and the air volume of the induced draft fan is too large. Among these failures of the linear vibrating Fluidized Bed Dryer, the corresponding causes can be checked to see if they are serious, and the problems should be found and solved in time, so as not to cause major failures.

Some product introductions of linear vibrating fluidized bed dryers, I believe in the product list, everyone has a certain understanding, what are the advantages of linear vibrating fluidized bed dryers in the application, how much do you know, here we are Changzhou Jiayi Drying summarizes some of the advantages of linear vibrating fluidized bed dryers, which are shared with you below. The advantages of linear vibrating fluidized bed Dryer: 1. Stable fluidization, no dead bed and blow-through phenomenon, and uniform products can be obtained. . 2. The vibration source is a vibration motor, with stable operation, convenient maintenance, low noise and long equipment life. . 3. Good adjustability, the thickness of the material layer, the residence time of the material in the machine and the change of the amplitude of the machine can be adjusted steplessly within the design range. . 4. Wide adaptability, suitable for materials with different specific gravity, particle size, water content and water content. . 5. It has little damage to the surface of the material, and can be used for drying fragile materials. The material particles are irregular, and it does not affect the working effect. 6. The heating method is direct heating, with high thermal efficiency and good energy saving effect. These are some of its product advantages for the linear vibrating Fluidized Bed Dryer, and they are also some of the things we will consider when choosing a dryer. Considering the cost-effectiveness, the advantage is one of the important reference points, so understand the linear vibration flow. The advantages of the chemical bed dryer are still necessary.

How is the linear vibration fluidized bed Dryer used? In actual use, it is necessary to master the appropriate operating specifications, so as to ensure the correct operation of the linear vibration Fluidized Bed Dryer and make the equipment longer service life, So how to do it. Preparations before starting the linear Vibrating Fluidized Bed Dryer: First check the equipment to ensure that the equipment is in good condition, then start it up, and then adjust the excitation force of the vibration motor to make the machine reach the required amplitude (no adjustment is required under normal circumstances). Operation and use of linear vibrating fluidized bed dryer: The first step; open the steam valve, the instrument pressure reaches the specified value according to the requirements. The second step: start the feeder to feed the material, so that the material is evenly distributed on the fluidized bed plate. The third step; Shi Ke pays attention to the vibration of the fuselage and the temperature inside the fuselage to ensure that it is safe and sound. Step 4: Always pay attention to the connection bolts to ensure that there is no loosening and falling off, and that each sealing surface has no leakage. Step 5: If abnormal sound or vibration occurs during operation, stop immediately for inspection. The sixth step; stop feeding, so that all the materials in the machine are processed. Step 7: Close the steam valve, stop the air supply, stop the vibration motor, continue to ventilate for 5-10 minutes, turn off the blower, then turn off the induced draft fan, and finally turn off other auxiliary equipment. In this way, one working process of the linear vibration fluidized bed dryer is over. Of course, after the shutdown, it is necessary to simply clean the surroundings of the linear vibration fluidized bed dryer and the equipment, so as to prolong the service life of the equipment.

Linear vibration fluidized bed Dryer is a kind of dryer that can dry chicken essence, salt, slag, watercress and other functional foods or chemical and pharmaceutical logistics such as xylitol, mannitol, boric acid, etc. The types are different, so the linear vibration Fluidized Bed Dryer needs to be cleaned regularly after a period of use. How to clean the linear vibration fluidized bed dryer? The following is about the linear vibration fluidized bed dryer. some cleaning. Cleaning includes regular and daily cleaning. During regular cleaning, the observation window and the accumulated material discharge port should be opened regularly to remove the materials remaining on the fluidized bed and the materials that fall into the box. If the fluidized bed screen is blocked, it should be dealt with. When washing with water, the equipment should be dried in time to remove moisture after washing, so as to avoid corrosion of the equipment and affect the next material treatment effect. Usually as an oral solid preparation workshop, the coating machine, granulation line, cleaning station, etc. share a process hot water system, which is an independent water circulation system, which connects the hot water to the panel and dries through a vibrating fluidized bed The PLC of the machine controls the hot water solenoid valve or pneumatic valve, and sets the cleaning time. The premise of WIP is to remove the filter bag and other detachable parts, and use the initial washing water, purified water, detergent, etc. as needed. Of course, the actual operation and cleaning, as well as the rules and the degree of cleaning, should be controlled according to the actual use, but regular cleaning is beneficial to the maintenance of the linear vibration fluidized bed dryer, and it should be cleaned regularly.

Vibrating fluidized bed is a kind of granular material Drying Equipment, mainly used in the process of granular feed processing. As a drying equipment, it is necessary for the user to understand the drying principle of the vibrating fluidized bed? The vibrating fluidized bed Dryer is a vibrating motor that generates an excitation force to make the machine vibrate. The material jumps forward under the action of the excitation force in a given direction. At the same time, the hot air input at the bottom of the bed makes the material in a fluidized state, and the material particles and hot air are sufficient. Contact to achieve the desired drying effect. The material enters from the material port, the material on the vibrating tank is in orthogonal contact with the hot air passing through the lower part of the vibrating tank to transfer heat, the wet air is drawn out by the induced air, and the dry material is discharged from the discharge port. Features of vibrating Fluidized Bed Dryer: 1. The vibration source is a vibrating machine, which has balanced operation, convenient maintenance, low noise and long life. 2. The fluidization is uniform, without dead voids and blow-through phenomena, and uniformly dried and cooled products can be obtained. 3. It can be adjusted well and adapt to a wide range. The thickness of the material layer and the moving speed in the machine, as well as the uniform change of the total vibration pair, can be adjusted steplessly. 4. The damage to the surface of the material is small, and it can be used for the drying of fragile materials. When the material particles are irregular, it will not affect the work effect. 5. The fully enclosed structure effectively prevents cross-infection of materials and space, and the working environment is clean. 6. The mechanical efficiency and thermal efficiency are high, and the energy saving effect is good. It can save energy by 30-60% compared with ordinary drying devices.

1. Fault phenomenon: the temperature display is different from the set temperature Cause analysis: insufficient steam pressure; steam sensor failure; electric heating heating failure; temperature sensor Fault; the damper of the moisture exhaust duct is too large. Remedy: check and repair the steam source; replace the sensor; check and repair the electric heater; replace the sensor; Adjust the damper. 2. Fault phenomenon: the fuselage moves laterally Reason analysis: the eccentric block of the vibration motor is not synchronized Remedy: Adjust the eccentric block 3. Fault phenomenon: the discharge speed is too fast Reason analysis: the air volume at the feed end is too large; the included angle of the eccentric block of the vibration motor is too small Remedy: Adjust the air regulating plate and the eccentric block 4. Fault phenomenon: the discharge speed is too slow Reason analysis: the air volume at the discharge end is too large; the included angle of the eccentric block of the vibration motor is too large Remedy: Adjust the eccentric block and the air inlet plate 5. Fault phenomenon: there are large particles at the discharge port of the cyclone dust collector Cause analysis: the air intake is too large; the air volume of the induced draft fan is too large Remedy: Adjust the air inlet plate and the air induction plate

The equipment installation and layout of the vibrating fluidized bed Dryer also has some principles, so that it can be fully used. How can the linear vibrating Fluidized Bed Dryer be installed and arranged better? The following are some layout principles about the Vibrating Fluidized Bed Dryer. . 1. The main principle of the layout of the vibrating fluidized bed dryer is to keep the products or parts flowing in a straight line during the processing, and the flow path should be as short as possible, and reverse flow should be avoided as much as possible to shorten the transportation time. 2. Appropriate spacing There should be a certain spacing between the equipment and the equipment, the vibrating fluidized bed and the building, so that the operation is convenient, the production is safe, and the area of the workshop is fully utilized. When arranging the vibrating fluidized bed dryer, it should first determine the arrangement of the vibrating fluidized bed according to the type of equipment, or according to the flow operation; whether it is arranged back to back or horizontally or vertically, and then according to the provisions of various arrangements, Select the minimum clearance size between devices from the relevant information. For the vibrating fluidized bed dryer, the installation arrangement is also an important part. Finally, I would like to remind everyone that the minimum distance between the vibrating fluidized bed dryer equipment and the wall column is also specified, which can be checked from the relevant information.

Vibrating fluidized bed dryer is more suitable for drying crystals and powders after centrifuges. It is also suitable for granular products such as food additives, organic fertilizer granules, etc. It is also suitable for cooling products, such as PVC Granules, plastic granules such as TPU, and product cooling after drying equipment, such as milk powder, coffee and other products. The principle of vibrating fluidized bed drying: the natural air is taken from the dry air, and the natural air is passed through the air filter by the blower and then heated to the set temperature by the heat source such as the steam heat exchanger or the electric heater (the temperature is determined according to the characteristics of the product) , through the pipeline to the lower bed of the fluidized bed or the bottom of the bed to enter the air to become the drying heat medium of the fluidized bed dryer. The wet product enters the bed of the fluidized bed from the feed port of the fluidized bed through the feeder. The fluidized bed is driven by the vibration motor on both sides or the head vibration motor to make the bed move, and the wet product moves along the fluidized bed. The fluidized bed moves horizontally parabolically in the in and out direction, and the drying hot air penetrates the bed plate from the bottom (the bed plate is a perforated plate) and contacts with our products to form heat convection exchange. During the whole drying process, the wet material is always suspended on the bed plate. After drying The water vapor and fine powder are discharged through the upward pipeline of the induced draft fan, and the dust is collected by the cyclone separator or bag filter at the back end. For a single fluidized bed, we can also design an integrated bed with drying and cooling. The dried product continues to move forward along our fluidized bed. At the front end, we separate the hot and cold air through a baffle. Instantly cool the product through cold air (cold air can be configured with low humidity and low temperature cold air), so as to prevent the material from returning to moisture and directly package it.

The boiling dryer operates under closed negative pressure and is controlled by a PLC control system. The temperature can be automatically adjusted and the working temperature is always maintained between 50 and 120 °C. With the advantages of good material boiling condition, uniform heat absorption, fast drying speed, and good drying quality of materials, the boiling dryer is a new model that has been successfully developed by absorbing and digesting foreign technology and combining with national conditions. The structure is reasonable, the performance is stable, the operation is convenient, and the whole machine has no dead ends and no exposed screws. The boiling dryer is composed of a host, an air handling system, a heating system, and a control system. When working, the material is added to the hopper of the dryer, the program and parameters are set according to the process requirements, and the whole machine starts to work. The air is filtered by the air treatment system, heated by the heating system, and then enters the main machine. The material is fluidized by the hot air, the water evaporates quickly, and the material is quickly dried. After the operation is completed according to the set procedures and parameters, the silo is pushed out and the lifting conveyor is buckled to lift the material to effectively control dust and cross-contamination. The equipment works under closed negative pressure, and the inner surface of the entire equipment is smooth and clean, without dead ends, easy to clean, and in line with "GMP" requirements. The boiling dryer can directly dry liquid materials, and has various functions such as rapid drying of granules and powder materials. The material hopper is conical, which can increase the flow rate of the material and facilitate fluidization. It is not easy for the material to form a dead angle in the hopper. The material hopper is equipped with a sampling device, which can be sampled at any time to test the drying end point of the material to ensure product quality. The boiling dryer has a cold air post-treatment process, and the dried materials can be cut by cold air in time. It can prevent the material from deteriorating due to excessive waste heat, and ensure the drying quality of the material. Special materials are used for air thermal filtration to prevent foreign matter in the radiator and impurities in the air from entering the material, ensuring the material is clean and pure. The boiling dryer is designed with a special gas distribution plate, so that the heat-carrying airflow enters in a spiral shape horizontally, so that the boiling material flow contacts the heat-carrying airflow, absorbs heat evenly, and dries the material quickly. Reduces steam consumption and saves energy. Generally speaking, there are four factors that affect the drying effect, namely drying temperature, dew point, time and airflow. The so-called dew point is the removal of moist air from a boiling dryer to a low residual moisture content. Then, the relative humidity is reduced by heating the air. At this time, the drying air pressure will decrease. By heating, the moisture inside can be released from the binding force with the surrounding particles by air diffusion. Dew point readings can help users find some problems, so to increase the dew point of dry air, you can monitor the dew point value. The drying temperature of the boiling dryer is also an important factor. Heat is the key to breaking up moisture and moisture between polymers. Above a certain temperature, water molecules and polymer chains greatly reduce gravity, and water vapor is blown away by dry air. Therefore, the drying temperature also has an important influence on the final drying effect. Drying time cannot be ignored. The relevant supplier shall specify the time required for the material to dry at the appropriate temperature and dew point. It takes some time in the air around the particles due to the absorption of heat and the diffusion of water molecules to the surface of the particles, and the drying time will affect the effect of the material to some extent. While the material is drying, the hot air transfers heat to the particles in the drying chamber, removing moisture from the surface of the particles and returning the moisture to the dryer. This time, there must be enough air to heat the resin to drying temperature and hold it for a while.

1. Explosion-proof measures of pressure spray Dryer 1. A blasting disc and an explosion venting valve are set on the side wall of the main tower dried by the Pressure Spray Dryer and on the top of the sub-a. 2. Install a safety movable door (also known as an explosion-proof door or an overpressure door). When the internal pressure of the pressure Spray Dryer is too large, the movable door will automatically open. 2. Attention should also be paid to the operation of the pressure spray dryer 1. First turn on the centrifugal fan of the pressure spray dryer, and then turn on the electric heating to check for air leakage. Normally, the cylinder can be preheated. The hot air preheating determines the evaporation capacity of the Drying Equipment, without affecting the quality of the drying material. to increase the suction temperature as much as possible. 2. During preheating, the valves at the bottom of the drying chamber of the pressure spray dryer and the discharge port of the cyclone separator must be closed to prevent cold air from entering the drying chamber and reducing the preheating efficiency.

The structure of the spin flash Dryer can divide the working process into four stages: crushing, gas-solid contact, drying, and grading. These four working processes are also not available in other dryers at the same time. Crushing: Since the rotary Flash Dryer is mainly used for drying paste-like materials, the materials are immediately crushed by stirring blades and high-speed airflow after entering the dryer, which maximizes the dispersion of materials and the surface area of wet materials per unit volume. Gas-solid mixing: The Rotary Flash Dryer uses air as the heat carrier, and whether the gas-solid mixing can be effectively achieved is the main factor affecting the drying rate. The stirring blade breaks the material and produces a dispersion effect. At the same time, the hot air entering the dryer is also in a highly flowing state, and quickly achieves gas-solid mixing. Drying stage: After the material is crushed, it is blown up by the high-speed rotating hot air from the bottom, forming a relatively stable fluidized bed in the drying chamber. evaporated at this stage. Classification stage: The classifier is an annular baffle installed at the lower part of the outlet of the dryer. The material rises with the air flow. Due to the centrifugal force, the large and wet materials are affected by the centrifugal force and the rotation radius increases. When the rotation radius is larger than the radius of the classification ring, the material is blocked in the dryer, and can be discharged from the dryer through the classifier until the requirements are met.

The heat exchange of the dryer is mainly based on the air flow and the particles, and the two heat exchanges between the cylinder wall and the particles. The drying process is essentially the diffusion process of water, which depends on the process that the water in the material becomes steam and diffuses outward. The rotary Flash Dryer adopts high-speed hot air flow into the cylinder in the tangential direction. Due to the spiral motion of the airflow in the cylinder, on the one hand, the temperature of the medium around the particles is reduced, and the flow rate and temperature of the medium are increased at the same time, which greatly improves the speed of external diffusion. On the other hand, the high-temperature airflow impacts the particles or wet materials in the lower part of the cylinder at high speed, and at the same time, the stirring effect of the stirring blades in the cylinder makes the particles broken, the particle size is reduced, and the diffusion resistance of water is reduced. Most of these particles are repeatedly broken in the cycle of high temperature and high stirring intensity at the lower part of the cylinder, which eliminates the agglomeration of materials, and also promotes the diffusion of water in the powerful measures, which strengthens the evaporation of water. The flow mode of particles and hot air flow: there are both convection and co-current in the lower part of the cylinder, and for coarse particles, it is convection and co-current repeated heat exchange. For fine-grained materials, it is paralleled with the hot air flow, so the drying process can be completed in an instant. For the drying of particles, hot air drying with high temperature and low humidity is actually used. These particles are mainly adsorbed by water molecules and filled between the voids of the particles. Under the conditions of high temperature and low humidity, the heat conduction of the whole particle is slow, resulting in local stress concentration and drying, cracking, breaking, dispersing, and accelerating the drying process. After the material enters the dryer, the hot air first transmits heat to the surface of the material, causing the evaporation of the surface water, and the water inside the material particles continuously diffuses to the surface and diffuses to the outside, and finally achieves the drying of the entire particle. If the material does not undergo chemical reaction during the drying process, the changes in moisture content, temperature and drying time of the material can be divided into the following stages: 1. Speed-up drying stage: The particles are placed in a heat transfer medium with a high temperature and a relative humidity of less than 100%, and the surface is heated to the wet bulb temperature of the drying medium in a short period of time, and the water evaporation rate increases rapidly. After time, the heat absorbed by the particles is equal to the heat consumed by the evaporated water, and the equilibrium is reached. The time of this stage is very short, and after the discharge of water is not large, it enters the isokinetic stage. 2. Isokinetic drying stage: In this stage, the water evaporated from the surface of the particles is continuously replenished from the inside to the surface of the particles, and the surface is always kept wet. At this time, the drying rate remains unchanged, and the surface temperature of the particles remains unchanged. The evaporation rate is related to the difference in water vapor concentration and temperature between the particle surface and the surrounding medium. The greater the difference, the greater the drying rate. In addition, the drying rate is also related to the air velocity on the particle surface. Increasing the air flow speed on the particle surface can increase the drying rate. Drying continues for a certain period of time, the diffusion rate of moisture inside the particles begins to be lower than the surface evaporation rate, and the moisture in the particles can no longer fully wet the surface to maintain the evaporation of the surface, and then enter the next drying stage. 3. Deceleration drying stage: After the moisture reaches a certain level, the moisture inside the particles is not enough to fully wet the surface, the wet surface gradually decreases, and the drying rate gradually decreases. At this stage, the evaporation rate and heat consumption are greatly reduced, and the surface temperature of the particles is higher than that of the medium. The wet bulb temperature increases gradually, and the temperature difference with the heat carrier decreases until it is close to or the same. 4. Equilibrium stage: At this time, the moisture absorption and evaporation on the surface of the particles reach equilibrium, and the drying rate is zero. Due to the small particles of the material after drying, the Rotary Flash Dryer stays in the dryer for a short time, usually 1 to 3 seconds. Therefore, the drying of the particles is in the constant speed drying stage, and the surface temperature is the wetness of the drying medium. ball temperature. Using a rotary flash dryer, the particle size of the material is uniform, which is conducive to ensuring product quality.

1. Check before starting the machine, check whether the connecting parts of each part are connected tightly, check whether the receiving device is well connected, and check whether the power supply is well connected. 2. Start-up preparation: Whether the material to be dried is in place, place it at the inlet of the flash dryer feeding device, connect the power supply, whether it is powered on to make it normal, and observe whether the voltage, current, and compressed air values are correct. 3. Start the equipment: turn on the front blower of the flash dryer, and then turn on the rear induced draft fan. At this time, the circulation system is turned on, and observe whether there are abnormal noises and other problems. Everything is normal. Turn on the heating device, and the temperature setting can be stored by PLC. The product parameters can be set with one key or manually according to the product characteristics. After the setting is completed, wait for the temperature to reach the set value of the flash dryer, turn on the stirring device of the flash dryer, and after the operation is stable, Turn on the screw feeding device, start feeding slowly, and observe the outlet air temperature. The outlet air temperature is automatically adjusted according to the feeding speed of the flash dryer. On the premise of ensuring the outlet air temperature, we can accurately control the outlet air temperature. The moisture of the flash dryer product, after feeding, observe whether it is smooth, open the air hammer of the flash dryer, and start continuous production. 4. Equipment shutdown: After the continuous production is completed, first stop the screw feeder of the flash dryer, then stop the heating device, wait until the internal temperature of our flash dryer cools down to below 50 ℃, shut down the stirring system, and shut down the back end The induced draft fan, shut down the front-end blower, and the back-blowing system of the bag filter will stop 10 minutes after the fan is shut down (the flash dryer also has a one-key start-stop function). main switch. 5. Equipment cleaning: After the flash dryer is shut down normally, we can connect the high-pressure water gun through the cleaning port reserved in the flash dryer to fully clean the inside of the entire equipment. We are equipped with drainage devices at the lowest point of the equipment. , After cleaning, the equipment must be dried. The cleaning of the bag filter needs to take out the internal filter bag for cleaning.

Rotary flash drying is to use hot air as the drying medium in the drying process and realize the medium circulation in the whole system through the fan, to achieve the heat exchange between the hot air and the wet material in the drying process, to vaporize the moisture in the product, and to achieve the inside of the product. Moisture pull, i.e. drying of the product. The dry hot air is taken from the natural air in the environment, and after passing through the front air filter, it is blown in by the blower (steam heat exchanger, electric heater, natural gas and other hot air furnaces are heated, and the heated hot air passes through the flash dryer. The special double-air channel hot air distributor can achieve hot air with uniform hot air, constant flow rate and stable flow direction after distribution. The hot air and screw feeder are added to the flash dryer to strengthen the convection of the wet product after stirring, and start to realize heat exchange, gas phase separation, etc. A series of physical changes in heat exchange, the surface moisture of the wet product is taken away, and the final moisture content of the product is reached. The bottom structure of the flash drying host is equipped with a strong stirring system, which can quickly and completely disperse and crush the added wet materials, increase the contact area with the hot air, improve the drying efficiency, and achieve the purpose of evaporating water in an instant. , and the final products obtained after crushing are all powder particles with uniform uniformity, and the particle size can be adjusted, eliminating the process of later crushing and screening. The top of the flash drying is equipped with a grading ring device. If the product fails to meet the qualified requirements, it will sink along the inner wall of the flash drying and continue to dry. After passing the cyclone separator and bag filter, the qualified products will be discharged. Through a suitable discharge valve, it is sent to the next process. The dried product is collected in two stages, the first stage is a cyclone separator, and the second stage is a bag filter or a water film filter (the recovery rate can reach 99.99%) After drying, the water vapor is evacuated by the induced draft fan. The whole system is equipped with two power fans. The front-end blower provides the air volume in the system and the resistance of the customer's heater stirring device. The rear-end is equipped with an induced draft body to provide the air pressure in the whole system. The system operates as a slight negative pressure during the entire drying process. Operation, high controllability.

Classification introduction Spray dryer is a one-step direct drying method from raw material solution to finished powder. - Centrifugal Centrifugal spray is a kind of spray drying method after liquid is atomized by high-speed centrifugal atomizer. -pressure Pressure spray is a spray drying method in which liquid is atomized through a spray gun by a high-pressure pump - closed loop Closed-circuit spray dryer is a spray drying method that uses inert gas as a circulating medium Selection The selection of spray drying is to select the most suitable spray drying method according to the characteristics of raw materials, moisture content, raw material state, and finished product form. -working principle The working principle of centrifugal spray drying: After the raw material is atomized by the centrifugal atomizer, a specific surface area of the raw material is increased, and the heat exchange with the hot air of our spray dryer is instantaneous, and the moisture of the raw material is evaporated instantly, and our powder product is obtained. . The working principle of pressure spray drying: The raw materials are transported to our pressure spray gun through a high-pressure diaphragm pump. Under the action of high pressure, the raw materials are atomized through the nozzle of the spray gun, and then contact with the hot air of the equipment instantly to evaporate the water to obtain our products. Principle of closed-circuit spray dryer: The closed-circuit spray dryer circulates in the spray dryer equipment through inert gas, and is aimed at the spray drying of raw materials containing organic solvents, and other toxic and harmful substances. - Differences in materials The centrifugal spray dryer is atomized by a high-speed centrifugal atomizer. The rotation speed is faster, the atomization is more uniform, and the obtained product powder is relatively fine. The pressure spray dryer is atomized by a spray gun, the nozzle of the spray gun can be adjusted, the atomization cone angle is controllable, and the product is small granular or spherical with good fluidity. Differences in different application areas Centrifugal spray dryers are used in some common pharmaceutical intermediates, plant extracts, hydrolyzed proteins, chemical raw materials, new materials and other related fields. Pressure spray dryers are used in some common dairy industries, non-dairy creamers, dyes, and some related fields that require large particles and good fluidity application -food Hydrolyzed protein, seasonings, plant extracts, natural pigments, eggs, plasma blood cells, dairy products, enzymes, etc. -Pharmaceuticals APIs, Chinese herbal extracts, pharmaceutical excipients, antibiotics, etc. -Chemical Organic chemistry, inorganic chemistry, dyes, resins, detergents, active agents, etc. -new material Ceramics, lithium batteries, magnetic materials, etc.