Ammonium phosphate slurry filter press

Abstract

The invention relates to an ammonium phosphate slurry filter press. The filter press comprises a box body, a filter cloth arranged in the box body, a pickling circulation tank arranged on the outer wall of the bottom of the box body, and spraying nozzles arranged on the upper part of the box body. The spraying nozzles communicate with the pickling circulation tank through a circulation pump. An aeration rod is arranged on the sidewall inside the box body. The aeration rod is a hollow pipe with pores on the outer surface. The aeration rod communicates with a gas source. The bottom of the box body communicates with the pickling circulation tank through a solenoid valve. A heating device is arranged on the outer wall of the pickling circulation tank. A mixed acid of sulfuric and phosphoric acid is arranged in the pickling circulation tank. The filter press has the following advantages: the filter cloth of the slurry filter press can be cleaned in time, such that problems of short application period and high replacement and cleaning difficulties of the filter cloth of the slurry filter press are effectively solved. The service life of the filter cloth can be prolonged to a normal retirement period.

Description

technical field [0001] The invention relates to a filter using filter cloth, in particular to an ammonium phosphate slurry filter press. Background technique [0002] During the production of industrial monoammonium phosphate by wet-process phosphoric acid, the neutralization reaction slurry is relatively viscous, and a box-type filter press is generally used to filter and separate the slurry, because the ammonium phosphate slurry contains complex fine and insoluble inorganic salts , The filter cloth used as the filter medium will be blocked after an average of 10 days of use, and the filter cloth will have to be replaced due to a decline in its filtration efficiency. [0003] The general treatment method is to replace the filter cloth in time, which not only consumes a lot of filter cloth, takes a long time to replace, and is labor-intensive, but also seriously affects the normal production. Contents of the invention [0004] The purpose of the present invention is to ov...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of using the filter cloth of the existing filter press, to provide a slurry filter press which can clean the filter cloth of the slurry filter press ammonium phosphate in time, and effectively solve the problem of using the filter cloth of the slurry filter press. The problem of short cycle and difficult replacement and cleaning, prolonging the service life of filter cloth to the normal damage and scrapping cycle

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