Disc continuous dryer introduction:
Tray continuous dryer is a highly efficient conductive continuous drying equipment. Its unique structure and working principle determine that it has the characteristics of high thermal efficiency, low energy consumption, small footprint, simple configuration, convenient operation and control, and good operating environment. It is widely used in chemicals, medicine, pesticides, food, feed, and agriculture. It is well received in practice in various industries. Now it produces three types of atmospheric pressure, airtight, vacuum, 1200, 1500, 2200, 3000 four types, A (carbon steel), B (stainless steel in contact with materials), C (on the basis of B, add steam pipe The road, main shaft and bracket are made of stainless steel, and the cylinder and cover are lined with stainless steel). The drying area is 4 to 180 square meters. There are hundreds of models of series products, and a variety of auxiliary equipment can be provided to meet the needs of users for drying various materials.
Working principle of disc continuous dryer:
The wet material is continuously added to the drying plate on the first layer of the upper part of the dryer from the feeder, and the rake arm with rake leaves rotates so that the rake leaves continuously rip the material. The material flows through the surface of the drying plate along an exponential spiral. The material on the small drying plate is moved to the outer edge, and falls on the outer edge to the outer edge of the large drying plate below. On the large drying plate, the material moves inward and falls into the next layer of the small drying plate from the middle blanking opening. The large and small drying trays are arranged alternately up and down, so that the material can continuously flow through the entire dryer. A heating medium is passed into the hollow drying tray. The heating medium includes saturated steam, hot water and heat transfer oil. The heating medium enters from one end of the drying plate and exits from the other end. The dried materials fall from the drying plate of the latter layer to the bottom layer of the shell, and then are moved to the discharge port by the harrows for discharge. The moisture escapes from the material and is discharged from the moisture drain port on the top cover. The moisture of the vacuum tray dryer is discharged from the vacuum pump port on the top cover. The dry materials discharged from the bottom layer can be directly packaged. By adding finned heaters, solvent recovery condensers, bag filters, dry material back-mixing mechanism, induced draft fans and other auxiliary equipment, the drying production capacity can be improved. It can dry paste and heat sensitive materials. The solvent can be easily recovered, and pyrolysis and reaction operations can be carried out.
Performance characteristics of disc continuous dryer:
(1) Easy regulation and strong applicability
◎The drying process can achieve good results by adjusting the thickness of the material layer, the rotation speed of the main shaft, the number of harrow arms, the type and size of the harrow blades.
◎Each layer of the drying tray can individually pass in the heating or cooling medium to heat or cool the material, and the material temperature control is accurate and easy.
◎The residence time of materials can be adjusted accurately.
◎Single flow direction of materials, no back-mixing phenomenon, uniform drying, stable quality, no need for re-mixing.
(2) Simple and easy operation
◎The starting and stopping operation of the continuous disc dryer is very simple.
◎After the feeding is stopped, the raking leaves of the conveying material can quickly empty the material in the dryer.
◎Through the special sight glass of the large inspection door, the inside of the equipment can be cleaned and observed carefully.
(3) Low energy consumption
◎The material layer is very thin; the spindle speed is low; the material conveying system requires low power and low power consumption.
◎Drying by conduction heat, high thermal efficiency and low energy consumption.
(4) Good operating environment; recyclable solvent; dust emission meets requirements
◎Normal pressure type: Due to the low air velocity in the equipment and the humidity distribution in the equipment, it is difficult for dust to float to the top of the equipment, so the exhaust gas from the top moisture exhaust port contains almost no dust.
◎Closed type: equipped with solvent recovery device, which can easily recover the organic solvent in the wet gas. The solvent recovery device is simple and the recovery rate is high. For flammable, explosive, toxic and easily oxidized materials, nitrogen can be used as a moisture-carrying gas for closed-circuit circulation to make it safe to operate. Especially suitable for drying flammable, explosive and toxic materials.
◎Vacuum type: A disc dryer operated under vacuum, especially suitable for drying heat sensitive materials.
(5) Easy installation and small floor space
◎The dryer leaves the factory as a whole and is transported as a whole. It only needs to be hoisted in place, and the installation and positioning are very easy.
◎Due to the layered arrangement and vertical installation of the drying plate, even if the drying area is large, the floor space is small.
(1) Drying plate
◎Design pressure: generally 0.4MPa, up to 1.6MPa.
◎High working pressure: generally ≤0.4MPa, up to 1.6MPa.
◎Heating medium: steam, hot water, heat transfer oil,
Use hot water to heat the drying plate at 100℃;
Use ≤0.4MPa saturated steam or superheated steam at 100℃～150℃;
Use heat transfer oil to heat at 150℃～320℃;
＞320℃, it can be heated by electricity, thermal oil, molten salt, etc.
(2) Material delivery system
◎Spindle speed: 1-10 rpm, electromagnetic or frequency conversion stepless speed regulation.
◎Rake arms: There are 2-8 rake arms fixed on the main shaft on each drying plate.
◎Rake leaves: hinged on the rake arm, can float up and down with the plate to keep contact, and there are many forms.
◎Rolling: For materials that are easy to agglomerate and need to be crushed, adding rollers at appropriate positions can enhance the heat transfer and drying process.
(3) The shell has three types: normal pressure, airtight and vacuum
◎Atmospheric pressure type: cylindrical or octagonal prism type, with two structures of integral and split. The main pipeline of the heating medium inlet and outlet can be inside or outside the shell.
◎Closed type: cylindrical shell, capable of withstanding 5Kpa internal pressure. The main pipeline of the heating medium inlet and outlet can be inside or outside the shell.
◎Vacuum type: cylindrical shell with a design pressure of 0.1Mpa. The main pipeline of the heating medium inlet and outlet is in the shell.
(4) Air heater
Generally used in the case of large evaporation to enhance drying efficiency.
Adapt to materials:
Drying, pyrolysis, combustion, cooling, reaction, sublimation.
Technical parameters of disc continuous dryer:
|Specifications ||Outside diameter mm||Height mm||Dry area m2||Power Kw|