Jiangsu Shengman Drying Equipment Engineering Co., Ltd |
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Product 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.
Principle
It is an innovation horizontal batch-type vacuum dryer . The
moister of wet material will be evaporated by heat transmission.
The stirrer with squeegee will remove material on hot surface and
move in the container to form cycle flow. The evaporated moisture
will be pumped by vacuum pump.
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 its 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 oil
will be led into hollow drying plates from one end to other end of
the dryer. The dried product will drop from the last layer 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 dried 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.
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.
Features of technology
1.Drying plate
(1) Desiging pressure: general is 0.4MPa, Max. can reach 1.6MPa.
(2) Work pressure: general is less than 0.4MPa, and max. can reach
1.6MPa.
(3) Heating medium:steam, hot water, oil. When the drying plates’
temperature is 100°C, 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 >320˚C it will be heated by
electric, oil or fused salt.
2.Material transmission system
(1) Main shaft revoluton: 1~10r/min, electromagnetism of transducer
timing.
(2) Harrow arm: There are 2 to 8 pieces arm that be fixed on the
main shaft 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:Cylinder or eight-sided cylinder, there are
whole and dimidiate structures. The main pipes of inlet and outlet
for heating media can be in the shell, also can be in the outer
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
0.1MPa. 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.
Equipment parameters: