Method for improving washing and separating efficiency of polyphenylene sulfide particles

Abstract

The invention relates to a method for improving washing and separating efficiency of polyphenylene sulfide particles. The method is mainly characterized in that a washing machine which is partitioned into a washing cavity and a collecting cavity by a stainless steel sintering filter plate and is provided with a stirring device is used for washing. The method mainly comprises the following steps of: putting the polyphenylene sulfide particles to be washed into the washing cavity; adding a washing agent to ensure that the washing agent is over washed matters; taking hot water as a medium, and sufficiently stirring to ensure that the washed matters are uniformly mixed with the washing agent, so that microparticles in polyphenylene sulfide to be washed are separated from surfaces of large particles and are isolated and collected into the collecting cavity in time; discharging the washing agent containing the microparticles by a drain valve to finish once washing; and adding the new washing agent to repeat once or more washing till qualified washing is finished, and dropping a kettle and turning over for discharge. By means of the method, microparticles are not easy to arise and cover the large polyphenylene sulfide particles, so that possible loss of a target product in the transfer process can be avoided, and the manpower consumption is reduced.

Description

technical field [0001] The invention relates to a washing method, in particular to a method for improving the washing and separation efficiency of polyphenylene sulfide particles. Background technique [0002] Generally speaking, for dry solid particles, particles of different particle sizes can be separated by sieving, and for solids in the liquid phase, the solids can be filtered out by filtration. However, when there are particles of different particle sizes in the solution, or when the surface of the particles is wet and sticky, and tiny particles (less than a certain particle size) are adsorbed on the surface of large particles, the particles of different particle sizes should be separated. It seems more difficult. [0003] The traditional method is to use a suitable solvent or medium to temporarily separate the tiny particles adsorbed on the surface of the particulate matter under stirring conditions, but when the stirring is stopped and the filter is ready, the tempo...

AI Technical Summary

Problems solved by technology

However, when there are particles of different particle sizes in the solution, or when the surface of the particles is wet and sticky, and tiny particles (less than a certain particle size) are adsorbed on the surface of large particles, the particles of different particle sizes should be separated. more difficult

[0003] The traditional method is to use a suitable solvent or medium to temporarily separate the tiny particles adsorbed on the surface of the particulate matter under stirring conditions, but when the stirring is stopped and the filter is ready, the temporarily separated tiny particles will precipitate and adsorb again. On the surface of large particles, the effect of washing and separation is not good. It needs multiple washings and continuous dilution to obtain the corresponding effect, which increases the number of washings and the amount of detergent used.

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