The difference and choice of double cone dryer and rake dryer

Double Cone Rotary Vacuum Dryer is a new type of dryer that combines mixing and drying. The condenser, vacuum pump and dryer are matched to form a vacuum drying device. (If you need to recover the solvent, the condenser can be unnecessary) The local planning is leading, the internal structure is simple, the cleaning is simple, the materials can be fully discharged, and the operation is simple. Can reduce labor intensity to improve the working environment. When the container itself is reversing the material, the material also rolls but the material is not accumulated on the container. Therefore, the heat transfer coefficient is high, and the drying rate is large. This not only saves energy, but also the material is even and dry, and the quality is good. Can be widely used in pharmaceutical, chemical, food, dyes and other occupational materials drying. Meet the requirements of drug management standards "GMP". A vacuum rake dryer is a conductive heat transfer dryer. The material is not directly touched by the heating medium and is suitable for drying a small number of mud-like and paste-like materials that are not resistant to high temperatures and are easily oxidized, and the moisture content is 15% to 90%. The blades of the horizontal jaw mixer in the dryer are made of cast iron or steel and are mounted on a square shaft with half the blades facing left and the other half facing right. The rotation speed of the shaft is 7~8r/min, which is driven by the motor with reduction gear. Use the active steering device together to change the rolling direction of the mixer and change the rolling direction of the mixer every 5~8 minutes. The vacuum rake dryer has the advantages of simple structure, convenient operation, long operation cycle, stable and reliable function, small steam consumption, strong application function, and good product quality. It is especially suitable for oxidizing pastes that are not resistant to high temperatures, flammability, and temperature regulation. The drying of the material, the rake dryer proved to be an outstanding drying equipment after long-term use by the user.

The double-cone rotary vacuum dryer manufactured by Changqun Drying is a new type of dryer that combines mixing and drying. The condenser, vacuum pump and dryer are matched to form a vacuum drying device. (If you do not need to recover the capacity, the condenser may not be necessary) The local planning is leading, the internal structure is simple, the cleaning is simple, the material can be fully discharged, and the operation is simple. Can reduce labor intensity to improve the working environment. When the container itself is reversed, the material also rolls and no material accumulates on the wall. Therefore, the heat transfer coefficient is high, the drying rate is high, and not only energy is saved, but the material is even and dry, and the quality is good. Can be widely used in pharmaceutical, chemical, food, dyes and other occupational materials drying. Meet the requirements of drug management standards "GMP".

The principle of vacuum rake dryer: the material to be dried is taken from the middle of the upper part of the housing. Under the mixing of the reciprocating rolling teeth, the material moves back and forth axially, and the appearance of touching the inner wall of the housing is continuously updated and steam is encountered. Indirect heating, even mixing of caries, destroy the destruction of the bar, make the water content of the material more favorable to discharge, the gasification of moisture by dry scrubbers, wet scrubbers, condensers, vacuum rake drying machine from the vacuum pump outlet .

When the vacuum rake dryer is in operation, the mixer is started first, the material to be dried is taken in, and the charging port is closed. Pass steam heating together, the pressure of heating steam is usually 0.2~0.4Mpa (gauge pressure). With a vacuum pump to extract water vapor and non-condensable gases, usually when the material is dry, the vacuum is about 700mmHg. The moisture transpiration strength of this dryer varies with the nature of the material, the humidity, the pressure of the heating steam, and the degree of vacuum. For example, when the vacuum degree is 700 mmHg and the heating steam pressure is 0.2 Mpa (gauge pressure), the potato starch is dried from 40% of the initial moisture to 20%, and the moisture transpiration intensity of the dryer is 5 to 7 kg/m 2 h.

Frequently, the operation of drying the vacuum rake dryer in Changqun Group is lower than the labor intensity of the box driers, and it is possible to retrieve the useful moisture content of the driers. The operating conditions are good and handling is convenient. The defects are low production capacity, complicated equipment construction, and easy damage to mixer blades. This type of dryer is used more often in dyes and pharmaceutical industries. For example, drying and reduction of materials such as dyed and stained intermediates, silicone sealants, guanidine sulfonic acids, reduced olive green R, salicylic acid intermediates, caprocopolymers, diaminoanthraquinones, and the like.

The double cone reverse vacuum dryer is a double cone reversed tank. Under the vacuum condition of the tank, it is heated by steam or hot water in the jacket. The heat is touched by the inner wall of the tank and wet materials, and the wet material absorbs heat. The vaporized water vapor is pumped through a vacuum pump via a vacuum pump. Because the inside of the tank is in a vacuum state, and the reversal of the tank makes the materials continuously turn up and down inside and outside, the drying speed of the materials is accelerated, the drying progresses, and the purpose of uniform drying is achieved.