Principle of work:
Wet materials are fed continuously to the top drying layer in the dryer. They will be turned and stirred continuously by harrows when the harrow's arm rotates, the material flows through the surface of
the drying plate along the exponential helical line. On the small drying plate the material will be
moved to it's exterior edge and drop down to the exterior edge of the large drying plate underneath, and will then 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 saturated steam, hot water or thermal oit will be led into hollow drying plates from one end to other end of the dryer. The dried
product will drop from the last tayer of the drying plate to the bottom layer of the smell body, and will be moved by harrows to the discharge port. The moisture exhausts from materials and will be
removed from 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 dired product 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 recovery, bag dust filter, return and mix mechanism for dried materials
and suction fan etc. solvent in those paste state and heat sensitive materials can be easily
recovered, and thermal decomposition and reaction can be also carried out.
Description
PLG series continuous plate dryer is a kind of high efficiency conducting and continuous drying
equipment. Its unique structure and operating principle provide advantages of high heat efficiency,
low energy consumption, less occupying area, simple configuration, easy operation and control as
well as good operating environment etc. It is widely used in drying process in the fields of chemical,
pharmaceuticals, agricultural chemicals, foodstuff, fodder, process of agricultural and
by-products etc,and is well received by various industries. Now there are three big
categories, normal pressure, closed and vacuum styles and four specifications of 1200, 1500,
2200 and 2500 ; and three kinds of constructions A. (carbon steel), B(stainless steel for
contact parts) and C (on the basis of B to add stainless steel for steam pipes,
main shaft and support, and stainless steel linings for cylinder body and top cover).
With a drying area of 4 to 180 square meters, now we have hundreds of models of
series products and various kinds of auxiliary devices available to meet requirements of various
products.
Features
(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 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.
Parameters of Continuous Plate Drying Machine
| Specifications | Outer Diameter (mm) | Height (mm) | Drying Area (m2) | Power (kw) | | Specifications | Outer Diameter (mm) | Height (mm) | Drying Area (m2) | Power (kw) |
| 1200/4 | 1850 | 2608 | 3.3 | 1.1 | 2200/8 | 2900 | 5782 | 55.4 | 5.5 |
| 1200/6 | 3028 | 4.9 | 2200/20 | 6202 | 61.6 |
| 1200/8 | 3448 | 6.6 | 1.5 | 2200/22 | 6622 | 67.6 | 7.5 |
| 1200/10 | 3868 | 8.2 | 2200/24 | 7042 | 73.9 |
| 1200/12 | 4288 | 9.9 | 2200/26 | 7462 | 80 |
| 1500/6 | 2100 | 3022 | 8.0 | 2.2 | 3000/8 | 3800 | 4050 | 48 | 11 |
| 1500/8 | 3442 | 10.7 | 3000/10 | 4650 | 60 |
| 1500/10 | 3862 | 13.4 | 3000/12 | 5250 | 72 |
| 1500/12 | 4282 | 16.1 | 3.0 | 3000/14 | 5850 | 84 |
| 1500/14 | 4702 | 18.8 | 3000/16 | 6450 | 96 |
| 1500/16 | 5122 | 21.5 | 3000/18 | 7050 | 108 | 13 |
| 2200/6 | 2900 | 3262 | 18.5 | 3.0 | 3000/20 | 7650 | 120 |
| 2200/8 | 3682 | 24.6 | 3000/22 | 8250 | 132 |
| 2200/10 | 4102 | 30.8 | 3000/24 | 8850 | 144 |
| 2200/12 | 4522 | 36.9 | 4.0 | 3000/26 | 9450 | 156 | 15 |
| 2200/14 | 4942 | 43.1 | 5.5 | 3000/28 | 10050 | 168 |
| 2200/16 | 5362 | 49.3 | | 3000/30 | 10650 | 180 |
Features of technology
1. Drying plate
(1). Designing pressure:general is 0. 4MPa, Max. can reach 1. 6 Mpa.
(2). Work pressure:general is less then
0. 4Mpa, and Max. can reach 1. 6 Mpa.
(3)Heating medium:steam, hot water, oil. When the drying plates' temperature is 100ºC, hot water can be used; when 100°C-150°C, it will be saturated water
steam<0. 4MPa or steam-gas, and when 150 ° C-320 ° C, it will be oil ; when > 320ºC it will be
heated by electric, oil of fused salt.
2. Material transmission system
(1). Headstock revoluton : 1-10 rpm, 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 rollers at the appropnate place (s).
3. Shell There're three types for option : normal pressure, sealed and vacuum
(1). Normal pressure
(2). Sealed : Cylindrical shell, could bear the interior pressure of 5KPa, the main ducts of the intet
and outlet of heating media might be inside of the shell or outside.
(3). Vacuum :Cylindrical shell, could bear the extenor pressure of 0. 1 MPa. The main ducts of inlet
and outlet is inside of the shell.
4. Afr heater:
Normal for the application of big evaporation capacity to increase drying efficiency.
