Working principle of disc dryer

The wet material self-feeder is continuously added to the first drying plate on the top of the dryer, and a rake arm with rake leaves is used for rotary movement so that the rake leaves are continuously copied material. The material along the exponential spiral flow through the surface of the drying plate, the material on the small drying plate is transferred to the outer Rim, and the outer rim falls to the outer rim of the large drying plate, on the large drying disk material moving inward and from the falling material into the next layer of small drying plate. The size of the drying plate alternating up and down, the material can continuously flow through the dryer. In the hollow drying disk into the heating medium, the form of heating medium saturated steam, hot water and heat conduction oil, heating medium by one end of the drying plate into the other end of the export. Dry material from the last layer of drying disk fell to the bottom of the shell, and finally by the rake leaves transferred to the discharge port. The wet part escapes from the material and is discharged by a wet vent located on the top cover, and the humidity of the vacuum disc dryer is drawn out by the vacuum pump port located on the top cover. Dry material discharged from the bottom can be packaged directly. By adding fin heater, solvent recovery condenser, bag filter, dry material return mixing mechanism, fan and other auxiliary machine, can improve its dry production capacity, dry paste and heat sensitive materials, can easily recover solvents, and can be pyrolysis and reaction operations.

Main application fields of disc dryer

Drying pyrolysis calcination Cooling reaction sublimation
(i) organic chemical products
polyvinyl chloride resin, PTFE resin, maleic acid, anthraquinone, Nitro Anthraquinone, P-aminophenol, melamine, cyanuric acid, p-amino benzene sulfonic acid, antioxidant 168, phenol as, hard fat acid salt , aniline, Nitroaniline, bis-pentaerythritol, chlorinated paraffin, calcium formate, ethylene two amine, sodium benzene sulfonate, phthalic acid, dimethyl ester Five sulfonic acid sodium, thiourea, oil-soluble aniline black dye, acid black dye and other organic chemical raw materials and intermediates.
(b) inorganic chemical products
light calcium carbonate, active calcium carbonate, nanometer superfine calcium carbonate, magnesium carbonate, aluminum hydroxide, lime black, strontium carbonate, barium carbonate, potassium carbonate, Li de powder, insurance powder, barium sulfate, potassium sulfate, microsphere catalyst, magnesium hydroxide, copper sulfate, Nickel sulfate, nickel acid amine, sodium molybdate, sodium chloride, ice crystals, iron oxide red, lithium hydroxide, nickel hydroxide, zirconium hydroxide, calcium phosphate, sulfur and so on.

(iii) Medicine, food
ammonia benzyl toxin, Deng Salt, L-phenylalanine and Intermediates, cephalosporins, cephalosporins, Analgin, cimetidine, vitamin B12, vitamin C, medicinal salts, medicinal aluminum hydroxide, medicinal magnesium silicate, caffeine, tea, flower extract, Ginkgo biloba, chocolate powder, starch , corn germ and other raw materials and pharmaceutical intermediates.
(iv) feed, fertilizer
potassium carbonate, bio-potash fertilizer, protein feed, feed with chlortetracycline, mycelium, Bran, lees, grain, seeds, herbicides, cellulose, feed hydrogen phosphate, etc.

Characteristics of the use of disc dryers

(a) Easy to control, strong
applicability 1, adjust the thickness of the material layer, spindle speed, rake arm number, rake leaf type and size can make the drying process to achieve the best.
2, each layer of drying plate can be used alone into the hot or cold media, heating or cooling materials, material temperature control accurate, easy.
3, the material stay time can be precisely adjusted.
4, the material flow single, no return mixing phenomenon, dry evenly, stable quality, do not need to mix.

(b) Simple operation, easy
1, the dryer drive, parking operation is very simple.
2. After stopping the feed, the rake leaves of the conveying material can quickly empty the material in the dryer.
3, through the special large-sized inspection doors and mirrors, the equipment can be very carefully cleaned and observed.
(iii) Low
Energy consumption 1, the material layer is thin, the spindle speed is low, the material delivery system needs small power, less electricity.
2, with conduction heat drying, high thermal efficiency, low energy consumption.
(d) Good operating environment, recoverable solvents, dust emission in line with
The requirements 1, atmospheric type: Because the equipment internal gas flow rate is low, and the equipment humidity distribution on the low, the dust is difficult to float to the top of the equipment, so the top of the exhaust discharged from the wet mouth almost does not contain dust.
2, closed type: Equipped with solvent recovery device, can easily recover the organic solvents in the wet gas. Solvent recovery device is simple, high recovery rate, for flammable, explosive, toxic and easy oxidation of materials, available nitrogen as a wet gas carrying closed loop, so that safe operation. Especially suitable for the drying of flammable, explosive and poisonous materials.
3, Vacuum type: In the vacuum state operation of the disc dryer, particularly suitable for the drying of heat-sensitive materials.
(v) easy to install, covers an area
of small 1, the whole dryer factory, the overall transport, just lifting in place, installation positioning is very easy.
2, because of the drying plate arrangement, vertical installation, both drying area is very large, covers an area is also very small. 

Technical characteristics of disc dryer

(a) Drying tray
1, design pressure: generally 0.4MPa, up to 1.6MPa.
2, the highest use pressure: General ≤0.4 MPa, up to 1.6 MPa.
3, the heating medium: steam, hot water, heat conduction oil, drying disk temperature ≤100℃ with hot water heating, 100℃~150℃ with ≤0.4 MPa saturated steam or superheated steam heating, 150℃~320℃ with heat conduction oil heating, >320℃ can use electricity, lead oil , molten salt and other heating methods.
(b) Material delivery system
1, spindle speed: 1~10/min, electromagnetic or variable frequency stepless speed regulation.
2, rake arm: Each layer on the drying disk has 2~8 fixed on the main shaft of the rake arm.
3, Rake leaves: Stranded on the rake arm, can be floating up and down with the disk to maintain contact, there are many types.
4, rolling: Easy to caking and the need to break the material, in the appropriate location with rolling, can strengthen the heat transfer and drying process.
(c) The shell
has atmospheric pressure, closed, vacuum three type
1, Atmospheric type: The original tube or eight prismatic shape, there is a whole and two structures. The inlet and outlet supervisor of the heating medium can be in the shell or outside the shell.
2, closed type: cylindrical shell, can withstand 5Kpa internal pressure, heating medium import and export of the main road can be in the shell, can also be in the shell outside.
3, Vacuum type: cylindrical shell, design pressure for the external pressure 0.1MPa, heating medium import and export of the main road in the shell body. 

disc DryerTechnical Specifications