Low-temperature filter pressing and drying method and device for filter press

Abstract

According to the low-temperature filter-pressing drying method and device of the filter press, hot fluid is guided into the filter plate to heat the material to be filtered in the filter chamber, the viscosity of the material is reduced so as to facilitate the filtering operation, and the filter chamber is vacuumized and depressurized at the end of the filtering stroke of the filter-pressing dehydration operation, so that the evaporation temperature of the water body in the material is reduced; the purpose of drying and dewatering materials in the filter chamber is achieved in a low-temperature state by means of heat guided by the filter plate.

Description

technical field [0001] The invention belongs to the technical field of filter presses, and in particular relates to a low-temperature filter press drying method and device for filter presses widely used in fluid slurry in the industry. Background technique [0002] If the material filtered by the filter press is a moderately compressible or hydrophobic material, generally speaking, the dehydration performance is good; if the filtered material is a highly compressible material and a hydrophilic material, the dehydration performance will be greatly reduced; if the filtered material The material is biological sludge, because the surface of the biological mucous membrane is easy to adhere to the water, and it cannot be separated by general mechanical force. 80%, even if the pressure is applied for a long time, the moisture content still cannot be reduced, which is not conducive to the end-end disposal of the dewatered cake. [0003] Existing filter presses have poor dehydration...

AI Technical Summary

Problems solved by technology

[0002] If the material filtered by the filter press is a moderately compressible or hydrophobic material, generally speaking, the dehydration performance is good; if the filtered material is a highly compressible material and a hydrophilic material, the dehydration performance will be greatly reduced; if the filtered material The material is biological sludge, because the surface of the biological mucous membrane is easy to adhere to the water, and it cannot be separated by general mechanical force. 80%, even if the pressure is applied for a long time, the moisture content cannot be reduced, which is not conducive to the end-end disposal of the dewatered cake

[0003] Existing filter presses have poor dehydration performance for highly compressible materials and hydrophilic colloids with small particle sizes, such as biological organic sludge.

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