Spray dryer

Abstract

The invention relates to a spray dryer, comprising a dryer tower body and a frame for supporting the dryer tower body, wherein an air distributor and an atomizer are arranged at the top of a main dryer body; the air distributor is communicated with a hot air supply device through a pipeline; the atomizer is communicated with a material supply device through the pipeline; the dyer tower body comprises an upper tower body and a lower tower cone; the upper tower body and the lower tower cone are in communicated hollow jacket forms; an air feeder for blowing air to the inside of the jacket is arranged on the lower tower cone; a tower top jacket is arranged on the upper tower body; an air outlet is formed on the tower top jacket and communicated with an air inlet of the hot air supply device through a pipeline; a discharge hole is also formed at the bottom of the lower tower cone. The spray dryer adopts the tower body with the jacket structure, the temperature of the inner wall of the tower body is reduced by introducing air to the jacket, the material is prevented from being adhered to the wall, air entering the tower body to be preheated enters the hot air supply device again, and the material is dried after being heated, so that the overall operation energy consumption of the equipment is effectively reduced, and the purposes of saving energy and reducing emission are achieved.

Description

technical field [0001] The invention relates to the technical field of dryers, in particular to a spray dryer. Background technique [0002] Centrifugal spray drying is the use of centrifugal atomizer to dry certain liquid materials, the most widely used process in liquid process forming and drying industry. It is most suitable for producing powdery and granular solid products from solutions, emulsions, suspensions and pasty liquid raw materials. Therefore, spray drying is an ideal process when the particle size distribution, residual moisture content, bulk density and particle shape of the finished product must meet precise standards. [0003] like figure 1 As shown, the working principle of the spray dryer is: the air passes through the heater and enters the air distributor on the top of the centrifugal spray dryer, and the hot air enters the dryer evenly in a spiral shape. The feed liquid is pumped from the feed liquid tank through the filter to the centrifugal atomiz...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the technical problem that materials will stick to the inner wall of the spray dryer in the prior art, and to provide a spray dryer, which adopts a jacketed tower structure, and passes air into the jacket , play a role in reducing the temperature of the inner wall of the dryer tower, and the problem of material sticking to the wall will not occur when drying materials, which fundamentally solves the defects of the prior art, and the air preheated in the tower body enters the hot air supply again The device is heated into hot air to dry the material, which can effectively reduce the overall energy consumption of the dryer

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