Working Principle

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 flow through the surface of the 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 ge through the whole dryer continuously. The heatingmedia, which could be in forms of saturated steam, hot water or heat con-ducting 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 discharge port. The moisture escapes from materials and will be removed from the moist dischage 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 faised 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 decomposition and reaction can be also carried out. It is operated ayt condition of seal, and simple in operation, high efficiency, save energy (1. 3-1. 6kg steam/kg/H2O) · operation time is adjustable (15-60min) and it has wild application.

Features

(1). Easy control wide application

1. Regulate thickness of materials, rotating speed of main shaft, number of harrow sarm, style and sizes of harrows achieve best drying process.

2. Each layer of drying plate can be fed with hot or cold media individually to heat or cold materials and make temperature control accurately andeasy.

3. Dwell time of materials can be accurately adjusted.

4. Single flowing direction of materials without return flowing and mixing.

(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 is has high heating efficiency and low energy consumption.

(4) Good operation environment, solvent can be recovered and powder discharge meetthe 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 dischage port on the top.

2. Daedtype: 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 for safe operation. Especially suitable for drying 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 layer and installed vertically, it takes a small occupying area but large drying area.

Application

1. Drying plate

(1) Desiging pressure: general is 0.4MPa.

(2) Work pressure: general is less than 0.4MPa.

(3) Heating medium: hot water,oil; When the drying plates' temperature is 100℃. hot water can be used; an when 100℃-300℃. it will be oil; when>320℃ it will be heated by electric,oil or fused salt.

2. Material transmission system

(1) headstock revoluton: 1-10rpm, electromagnetism of transducer timing

(2) harrow arm: There are 2 to 8 pieces arm that be fixed on the headstock on each 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: cylinder or eight prism and there are two structures: whole or bisect. The main entrance Pipeline of heating medium Will be inside or outside of the shell.

(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 0.1 MPa 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.

Flow Chart

Technical Parameters