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Details

Disc continuous dryer

Brief introduction     

         Disc continuous dryer is a kind of high efficiency conduction type continuous drying equipment.Its unique structure and working principle determine its high thermal efficiency, low energy consumption, small footprint, simple configuration, easy operation and control, good operating environment and so on. Widely used in chemical, pharmaceutical, pesticide, food, feed, agricultural and sideline products processing and other industries drying operations.Well received in practice in various industries.Now producing atmospheric pressure, airtight, vacuum three big types, 1200, 1500, 2200, 3000, four kinds, A(carbon steel)、B(contact parts are uniformly stainless steel)、C(on the basis of B, add steam pipe, spindle and bracket for stainless steel, cylinder and top cover with stainless steel lining).Three types materials,dry area 4 ~ 180㎡，a total of several hundred models of the series,and can provide the necessary ancillary equipment. The utility model can satisfy the requirement of users for drying various materials.

Working principle

         The wet material from the feeder is continuously applied to the upper layer of the drying plate on the first dryer,A rake arm with a rake blade acts as a turning motion, so that the rake leaves the material continuously.The material flows along an exponential spiral through the surface of the drying disk. The material on the small drying tray is transferred to the outer edge,and fall to the outer edge of the large drying disk at the outer edge. On the large drying tray, the material moves inwards and falls into the lower drying tray from the middle blanking port.The size of the drying plates are arranged alternately, the material continuously through the whole dryer.Dry hollow plate the heating medium, heating medium forms of saturated steam, hot water or heat conducting oil heating medium flows from the end plate dryer, derived from the other end of.The dried material falls from the last layer of drying tray to the bottom of the shell, and is finally carried out by the harrow leaves to the discharge port.Moisture from the material on the cover out by wet exhaust outlet, a vacuum type disc dryer moisture by the vacuum pump on the top cover mouth out.The dry material discharged from the bottom layer can be packed directly.By adding fin heater, solvent recovery condenser, bag type dust remover, dry back mixed mechanism, fan and other auxiliary, can improve the production capacity of dry, dry paste and heat sensitive material can be easily recycled solvent, and can carry on the thermal decomposition and reaction.

Drying, pyrolysis, combustion, cooling, reaction, sublimation

（1）Organic chemical products

     PVC resin, Polytetrafluoroethylene resin, Fumaric acid, Anthraquinone, nitroanthraquinone, p-aminophenol, melamine, cyanuric acid, sulfanilic acid, antioxidant 168、 Naphthol As, stearic acid, aniline, p-nitroaniline, dipentaerythritol, chlorinated paraffin, calcium formate, three ethylene two amine, benzene and sulfonate, benzene two formic acid, two methyl five sulfonic acid sodium, thiourea, oil soluble aniline black dyes, acid black dyes and other organic chemical raw materials and intermediates.
（2）Inorganic chemical products

     Light calcium carbonate, active calcium carbonate, nano ultrafine calcium carbonate, magnesium carbonate, aluminum hydroxide, lime black, strontium carbonate, barium carbonate, potassium carbonate, lithopone, insurance powder, barium sulfate, potassium sulfate, microspheres catalyst, magnesium hydroxide, copper sulfate, nickel sulfate, nickel acid amine, sodium molybdate, sodium chloride, cryolite, red iron oxide, lithium hydroxide, nickel hydroxide, zirconium hydroxide, calcium phosphate, sulfur etc..

（3）Medicine, food

     Principen, Deng salt, l phenylglycine and intermediates, cefotaxime, ceftazidime three triazine, metamizole sodium, vitamin B12, cimetidine, Vitamin C, medicine medicinal salt, aluminum hydroxide, magnesium silicate, caffeine, partial medicinal tea, flower extract, Ginkgo biloba, chocolate powder, starch, corn and other raw materials and pharmaceutical intermediates.

（4） Feed, fertilizer

     Potassium carbonate, potassium fertilizer, protein feed, feed aureomycin, mycelium, bran, grains, grain, seeds, herbicides, cellulose, calcium hydrophosphate, etc..

Process characteristics

（1） Easy to control and strong applicability
  1、Adjusting the thickness of the material, the spindle speed, the number of the rake arm and the type and size of the rake leaves can make the drying process the best.
  2、Each layer of drying can be set individually through medium heat or cold medium, the heating or cooling materials, accurate temperature control, easy material.
  3、The residence time of the material can be adjusted accurately.
  4、The material flow direction is single, no mixing phenomenon, uniform drying, stable quality, no mixing.
（2）The operation is simple and easy
  1、The drive and stop operation of the dryer is very simple.
  2、When the feeding material is stopped, the rake leaves of the conveying material can quickly empty the material in the dryer.
  3、Through special large inspection doors and mirrors, the equipment can be carefully cleaned and observed. 
（3）Low energy consumption
  1、The material layer is very thin, the spindle speed is low, the material transmission system needs less power and less power consumption.
  2、To heat drying, high thermal efficiency, low energy consumption.
（4）Good operating environment, recyclable solvent, dust emission and so on
  1、Atmospheric type: Because of the low gas flow rate in the equipment and the low humidity distribution in the equipment, it is difficult for the dust to float to the top of the equipment, so the exhaust gas at the top of the exhaust outlet hardly contains dust.

  2、Hermetic: equipped with solvent recovery unit, which can easily recover organic solvent in the wet gas. The solvent recovery unit is simple and has a high recovery rate. For flammable, explosive, poisonous and oxidizable material, nitrogen can be used as a carrier gas to carry out closed circuit, so that it can be operated safely. It is especially suitable for the drying of flammable, explosive and poisonous materials.
  3、Vacuum type: The disc dryer is operating under vacuum condition, especially suitable for drying heat sensitive materials.

（5）Easy installation, small footprint
  1、Dryer whole leave the factory, the whole transport, just lifting in place, installation positioning is very easy.
  2、Because of the dry-type layout, vertical installation, even dry area, covers an area of small.

Technical characteristics
(1)Drying plate

    Design pressure: Generally 0.4MPa, up to 1.6MPa.
      1.Maximum working pressure: generally less than 0.4MPa, up to 1.6MPa.
      2.Heating medium: steam, hot water, heat conducting oil and drying plate. Use hot water when it is 100 degrees centigrade. When 100℃～150℃, heating with less than 0.4MPa saturated steam or superheated steam. When 150℃～320℃, Heating with a heat conducting oil. When ＞320℃,it is heated by electric, heat conducting oil and molten salt.

 (2)Material delivery system

     1. 1~10 rpm, electromagnetic or variable frequency stepless speed regulation.
     2. Rake arm: each layer of drying tray has 2~8 arm arms attached to the main shaft.
     3. Rake blade: hinged on the rake arm, can float up and down with the surface to keep in touch, there are many forms.
     4. Roll: it can strengthen the heat transfer and drying process when the material is easy to agglomerate and need to be crushed.
 (3)The shell has three types of atmospheric pressure, airtight and vacuum.
     1.Atmospheric type: Cylinder or eight prism type with two structures: integral and opposite. The heating medium inlet and outlet main pipe can be in the shell or in the shell.
     2.Closed type:A cylindrical shell that can withstand 5Kpa internal pressure, the heating medium inlet and outlet main pipe can be in the shell or in the shell.
     3.Vacuum type: cylindrical shell, the design pressure is 0.1Mpa, the heating medium inlet and outlet main pipe is in the shell.
  (4) Air heater
      Generally used in the case of large evaporation, in order to enhance drying efficiency.