Design of negative pressure cleaning system for filter cloth of pressure filter
HOU Jing
Abstract：Existing cleaning devices for pressure filters face issues such as downtime cleaning affecting produc-tion continuity,periodic cleaning increasing cleaning difficulty,and low efficiency of water resource recycling.To address these problems,a negative pressure cleaning system for filter cloth,consisting of a cleaner,a wash-water separation chamber,and a wash-water circulation device,is proposed.This system utilizes the principle of negative pressure drive to achieve reverse dynamic cleaning of the filter cloth.By leveraging the solid-liquid separation function of the wash-water separation chamber and the secondary filtration of the circulation device,a closed-loop circuit of"cleaning—separation—filtration—reuse"is constructed.The results show that the sys-tem achieves simultaneous operation of filtration and cloth cleaning,which significantly improves the continu-ous operation time and filtration efficiency of the pressure filter.It removes residual coal slime on the cloth sur-face in real time,extending the service life of the filter cloth.Furthermore,it reduces the water cost of the coal preparation plant,with fresh water consumption expected to decrease by more than 30%.The negative pressure cleaning system for pressure filter cloth breaks through the limitations of traditional cleaning,achieves real-time cleaning and closed-loop recycling of wash water,effectively solves the key pain points of traditional cleaning technology,and meets the green and low-carbon development requirements of the coal preparation industry.
Keywords：filtration dewateringnegative pressure cleaning system for filter clothnegative pressure cleaningwash-water circulationfiltration efficiency
Publication Date：2025-10-31
Online Publishing Date：2026-03-12(First online date of this platform, not the publication date of the document)
Pages：6( 38-43 )