Descriptions

CPD Series Continual Plate Dryer Descriptions Plate dryer is a kind of high effective conducting and continuous drying equipment. 

Its unique structure and operating principle determine that it has advantages of high heat efficiency, low energy consumption, small 

occupying area，simple configuration, easy operate and control as well as good operating environment etc. It can be widely used

 in drying process in the fields of chemical industry. Pharmaceuticals, agricultural chemicals, foodstuff, fodder, process of agricultural 

and sideline products etc, and is well received by various sectors in their practical usage. Now there are three big categories, named 

normal pressure, closed and vacuum styles; four types of specification 1200， 1500，2200 and 3000; and three kinds of materials, 

namely A(carbon steel), B(stainless steel used for those contact materials part) and C(on the basis of B to add stainless steel 

materials for vapor pipes, main shaft and support, and stainless steel linings for cylinder body and top cover). With a drying area

 being from 4 to 180 square metres, now we have hundreds of models of series products and various kinds of auxiliary devices 

available to meet requirements of drying materials for customers.

Technical Featur

1.Drying disc
(1)Designing pressure: general is 0.4MPa, Max. can reach 1.6Mpa.
(2)Work pressure: general is less then 0.4Mpa, and Max. can reach 1.6Mpa.
(3)Heating medium: steam, hot water, oil. When the drying plates5 temperature is 100℃，hot water can be used; when 100℃-150℃, it will 

be saturated water steam ≤0.4Mpa or steam-gas, and when 150℃-320℃，it will be oil heating; when >320°C it will be heated by electric, 

oil of fused salt.
2. Material transmission system
(1)main shaft: 1-10rpm, electromagnetism of transducer timing.
(2)harrow arm: There are 2 to 8 pieces arm that be fixed on the headstock on the every layers.
(3)Harrow's blade: Surrounding the harrow's blade, float together with the surface of the plate to keep contact. There're various of types.
(4)Roller: for the products easily agglomerate, or with the requirements of grinding, the heat transfer and drying process might be reinforced 

by placing roller(s) at the appropriate place(s).
3. Shell There're three types for option: normal pressure, sealed and vacuum
(1)Normal pressure: The cylinder has the whole and the dual structure the heating medium inlet and out let main pipeline can be inside the 

shell, also can be outside the shell body.
(2)Sealed: Cylindrical shell, could bear the interior pressure of 5KPa, the main ducts of the inlet and outlet of heating media might be inside 

of the shell or outside.
(3)Vacuum:Cylindrical shell, could bear the exterior pressure of 0.1MPa. The main ducts of inlet and outlet is inside of the shell.
4. Air heater:
Normal for the application of big evaporation capacity to increase drying efficiency.

Use characteristics

(1)Easy control, wide application
1. Regulate thickness of materials, rotating speed of main shaft, number of harrow's arm, style of and sizes harrows achieve best drying process.
2. Each layer of drying plate disc can be fed with hot or cold media individually to heat or cold materials and make temperature control accurate and easy.
3. Dwell time of materials can be accurately adjusted.
4. Single flowing direction of materials without return flowing and mixing, uniform drying and stable quality, no re-mixing is required.
(2)Easy and simple operation
1. Start stop of dryer is quite simple
2. After material feeding is stopped, they can be easily discharged out of the dryer by harrows.
3. Careful cleaning and observation can be carried inside the equipment through large-scale viewing window.
(3)Low energy consumption
1. Thin layer of materials, low speed of main shaft, small power and energy required for conveying system of materials.
2. Dry by conducting heat so it has high heating efficiency and low energy consumption.
(4)Good operation environment, solvent can be recovered and powder discharge meet the requirements of exhaust.
1. Normal pressure type: as low speed of air flow inside the equipment and moisture being high in upper part and low in lower 

part, dust powder couldn't float to the equipment, so there is almost no dust powder in tail gas discharged from the moist discharge

 port on the top.
2. Closed type: equipped with solvent recovery device that can recover organic solvent easily from moist-carrier gas. The solvent

 recovery device has simple structure and high recovery rate, and nitrogen can be used as moist-carrier gas in closed circulation

 for those subject to burning, explosion and oxidation, and poisonous materials in order for safe operation.

 Especially suitable for drying of flammable, explosive and poisonous materials.
3. Vacuum type: if the plate dryer is operating under vacuum state, it is particularly suitable for drying heat sensitive materials.
(5)Easy installation and small occupying area.
1. As the dryer is in a whole for delivery, it is quite easy to install and fix at site only by hoisting.
2. As drying plates being arranged by layers and installed vertically, it takes a small occupying area though drying area is large.

Applications

PLG continuous plate dryer is appropriate for drying, calcining, pyrolysis, cooling, reaction and sublimation in the chemical, pharmaceutical, 

pesticide, food and agricultural industries. This drying machine is mainly used in the following fields:
1. Organic chemical products of PVC resin, polytetrafluoroethylene resin, fumaric acid, anthraquinone, nitroanthraquinone, paminophenol, 

melamine, cyan uric acid, sulfanilic acid, antioxidant 168, naphthol, stearic acid, aniline, p-nitroaniline, Double pentaerythritol, paraffin chloride,

 calcium formate, triethylene diamine, sodium benzene sulphinate, acide isophtalique, 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, magnesium hydroxide, microsphere catalyst, copper sulfate, nickel sulfate, nickel molybdate, amine acid sodium, sodium 

chloride, cryolite, iron oxide red, lithium hydroxide, nickel hydroxide, zirconium hydroxide, calcium phosphate, sulfur etc..
3. Medicine, pesticide, food principen, Deng salt, phenylglycine and intermediates, cefotaxime, ceftriaxone sodium, alnaigin, cimetidine, vitamin

 B12, vitamin C, medicinal salt, medicinal aluminum hydroxide, magnesium silicate, partial caffeine, tea, flower extract, Ginkgo biloba, chocolate

 powder, starch corn germ，raw materials and pharmaceutical intermediates. Potassium carbonate, potassium fertilizer, protein feed, feed 

aureomycin, mycelium, bran, grains, grain, seeds, herbicides, cellulose, calcium hydrophosphate, etc.

Sketch of structure

Principle of work

♦ Wet materials are fed continuously to the first drying layer on the top of the dryer. They will be turned and stirred by rakes when

 the rake arm rotates and drop down to the outer edge of the large drying plate along the exponential helical line. On the small 

drying plate they will be moved to its outer edge and drop down to the outer edge of the large drying plate underneath, and will 

be moved inward and drop down from its central hole to the small drying plate on the next layer. Both small and large drying 

plates are arranged alternately so as materials can go through the whole dryer continuously. The heating media, Which could be 

informs of saturated steam, hot water or heat conducting oil will be led into hollow drying plates from one end to the other end of 

the dryer.
♦ The dried materials will drop from the last layer of the drying plate to the bottom layer of the shell body, and will be moved by 

rakes to the dischargeport. The moisture escapes from materials and will be removed trom the moist discharge port on the top 

cover, or sucked out by the vacuum pump on the top cover for vacuum-type plate dryer. The dried materials discharged from

 the bottom layer can be packed directly.
♦ The drying capability can be raised up if equipped with supplementary devices such as finned heater, condenser for solvent 

retrieval, bag dust remover, return and mix mechanism for dried materials and drawing fan etc. Solvent in those dried paste 

and heat sensitive materials can be easily retrieved, and thermal decomosition and reaction can be also carried out.

Technical parameters