Backflushing filtering system for BOPP film production line

Abstract

The invention relates to the technical field of BOPP film production, and particularly discloses a backflushing filtering system for a BOPP film production line. Thebackflushing filtering system comprises a filtering box, wherein a filtering mechanism mounting cavity is formed in the filtering box, a rotatable outer cylinder is arranged in the filtering mechanism mounting cavity, spiral blades are arranged on the inner wall of the outer cylinder, outer cylinder water delivery pipes are arranged at the two ends of the outer cylinder, a filter cartridge is arranged in the outer cylinder, filtering holes are formed in the filter cartridge, and a plugging mechanism is arranged in the filter cartridge; two ends of the filter cartridge are provided with filter cartridge water delivery pipes; and the outer cylinder water pipes and gaps among the outer cylinder, the filter cartridge and the filter cartridge waterdelivery pipes jointly form a water delivery channel. According to the invention, cooling water is better filtered, and filter residues are better removed by backwashing the water delivery channel, the filter cartridge and the filter holes, so that the replacement of a filter element is avoided, the labor intensity of workers is better reduced, and continuous filtration of the cooling water can be well realized.

Description

technical field [0001] The invention relates to the technical field of BOPP film production, in particular to a recoilable filter system for a BOPP film production line. Background technique [0002] BOPP film production line is mainly composed of feeding system, extrusion system, casting system, longitudinal stretching system, horizontal stretching system, traction system, winding system, thickness measurement system and electrical control system, among which the casting system melts BOPP raw material After flowing out from the die, it is solidified into a thick sheet by chilling rollers and immersed in the frozen water of the water tank. Therefore, the frozen water is doped with impurities, dust and residues on the surface of the film, and when it enters the circulating pump, it will block the pipeline and cause production problems. bring great inconvenience. [0003] The patent document with the publication number CN208340286U discloses a circulating cooling water filtra...

AI Technical Summary

Problems solved by technology

Although the utility model realizes the filtration of cooling water, it still has the disadvantage that the filter cartridge and the filter element need to be cleaned regularly in actual use.

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