Detailed description

Spray drying is a widely-applied process in liquid process shaping +and drying industry. Particularly it is suitable for producing powder, granulate or block solid product from solution, emulsion, suspending liquid and pumped paste liquid. Therefore, when the distribution of granulate size, final moisture, bulk density, granulate shape of finished product must be conformed to accurate standard, the spray drying is an ideal process. The product made by the machine has good uniformity, fluidity, solubility, high purity and high quality.

Description:

The key point of this equipment is to pay attention to the problems such as the material sticking tower, moisture absorption, material collection and material protection.  To the problem of material of wall sticking mainly pay attention to the wet material, because extract viscosity teaches, the atomized particle size is large, when the centrifugal force generated by and large, according to the conventional atomization diameter to calculate, is bound to stick wall, so the design of tower body, the tower diameter, to ensure that the wall is not, of course can't infinite to expand the tower diameter.  Because the material contains a lot of glue, its hygroscopicity is strong, so in the whole process, the environment should keep the humidity low. General centrifugal spray drying machine of finished product granularity is 120-140 mesh, cyclone separator through level, can recycle 85% of the dry material, through the secondary cyclone separator, the recovery rate can reach 93%-96%, had better use the two-stage cyclone separator, the tower of dry powder rate reached 93%, and at the same time with wet dust collector, the material yield reached the highest.  The protection of the actual material is one of the most important, general extract low thermal temperature points in high temperature goes bad, therefore in the process of spray drying, it is important to use the right temperature to dry, to do the same condition, high yield, good product quality, also pay attention to the protection of dry material.  My company is the combination of practice and the special circumstances of the extract of tower body relatively large diameter, avoid wet material wall sticking, and equipped with pneumatic jar in the cone part, protect the powder product no deterioration in the cone, the powder can reach the discharge port as soon as possible. Also add cold air jacket on the tower body, avoid a small amount of accumulation in the cone part of dry powder is destroyed.

Features: 

Spray dryer is used to disperse the material into mist by using high speed centrifugal atomizer, and the drying device of powder finished product is formed when it is fully exposed to hot air.

Equipment installation of refrigeration dehumidification device can be in the process of material drying, can make the material in the primary, secondary cyclone discharge was immediately after cooling, won't make the material after drying in the condition of remaining agglomerate harden, after cooling of the material collected in cyclone separator, tail gas by cooling tower circulation fan back.

Spray dryer can be installed in the process of freeze dehumidification device, the material through in the cyclone, second-stage cyclone after the material was immediately cooled, will not let the material dry in the residual temperature after the agglomeration hardened, after cooling the material, then collect material by cyclone separator, exhaust air through the cooling fan and then recycle back to the inner tower.

The equipment installed HEPA filter, so that the air into the air purification of 100,000.

The air inlet of this device adopts three-stage filtration (initial effect, medium and high temperature & high efficiency filtration) air to reach 100,000 level purification. In this case, high temperature resistant type is installed in the outlet of the electric heater, so that the hot air that reaches the temperature is filtered through the filter and then enters into the tower, ensuring the cleanliness of the effective hot air. In order to detect the clogging degree of the medium and high efficiency filters, we installed the pointer type pressure differential gauge before and after the device site filter to detect the blockage during the filter work.

The main tower is made of the inner wall panel to ensure smooth and smooth inner wall. The top part of the main tower is equipped with a light hole for observe the operation of the tower. In order to make the material dry powder in the inner wall straight and the cone adsorption, the cone added 4 pneumatic shock absorber, effectively prevented the inner wall product more phenomenon. Jar to prevent vibration of tower wall for a long time makes the tower wall cracking or deformation, we use the steel beam welding in the tower wall first, because of the steel beam is made of 6 mm steel plate production, able to withstand the impact of the larger, exciting force produced by the jar have passed to the tower wall girder, and shock control adopts the symmetry of excitation method, to avoid the shock generated when resonance phenomenon, very good to protect the walls, not easy to deformation and cracking phenomenon.

The main tower adopts the cold air wall, effectively control the inner wall temperature of the main tower, and prevents the heat sensitive material absorb from the inner wall to be coking and denaturation. Cold adapted the progresses and protecting way design, ensure the tower high temperature and normal temperature air to heat exchange, in order to make into the cooling air of uniform, we adopt the tower to stick wall around a circle evenly distributed into the pores, and evenly distributed around a jacketed supporting strength, ensure that after the cold air into the jacket does not produce a short-circuit phenomenon, to ensure that the cooling air cooling wall. The cold wind through the clamp sleeve of the inner ring of the wind tunnel. To make the inner surface temperature does not reduce too much, we equipment temperature sensor, after the wind through the temperature control instrument set cooling air temperature, automatic control tower wall cooling temperature, ensure that due to the inner surface temperature is too low, the tower in condensation makes the material get damp and wall sticking phenomenon.

The cyclone separator is made of the inner wall mirror board, and the cyclone center pipe is designed with detachable design, and the cleaning hand hole is opened at the top and side of the cyclone to ensure the cyclone is high and easy to clean. The cyclone cone is equipped with a pneumatic bumper to ensure that dry powder is not bridged and stacked in the cone during collection. Cyclone discharge with large diameter double combination way of the flap valve material, flap valve is my company new practical patent invention (patent no. : 201320348932.6), changed the past using vacuum butterfly valve is easy to damage and difficult to clean up the situation. This plate valve has the advantages of simple structure, convenient operation and easy cleaning.

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