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The use of pressure spray granulation drying machine and its parameter requirements
Aug 28, 2018

Pressure spray granulation drying machine is a widely used process in the liquid process forming and drying industries for the production of powdered, granulated or massive solids from solutions, emulsions, suspensions and pumpable paste liquid materials. Therefore, pressure spray drying granulation 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, making pressure spray granulation dryers particularly popular.

 

The rapid drying and moderate temperature of the pressure spray granulation drying machine allows spray drying to be used for heat sensitive materials, ideal for embedding and producing dry emulsions or amorphous materials, with good flow properties and reduced dust generation or good powder flow. Performance and small aerodynamic particle size.

 

For pressure spray granulation dryers, it is important to distinguish between dryer inlet temperature, product temperature, drying temperature, and dryer outlet temperature. In a well designed pressure spray granulation dryer, the drying temperature and the dryer outlet temperature are the same; due to evaporation of the solvent in the product, the product temperature will be lower than the dryer outlet temperature, typically 5-20 °C.

 

For the outlet temperature and dry gas flow rate of a fixed pressure spray granulation dryer, lowering the dryer inlet temperature will result in a decrease in the feed amount, a decrease in the evaporation amount, and a decrease in the solvent vapor content of the exhaust gas. Therefore, the parameters of the spray drying must be balanced very carefully.

 

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