Multi-disc direct cleaning filter and use method thereof

Abstract

The invention relates to a multi-disc direct cleaning filter and a use method of the multi-disc direct cleaning filter, relates to the field of filtering of industrial sewage and papermaking white water, and particularly relates to the multi-disc direct cleaning filter and the use method of the multi-disc direct cleaning filter. The multi-disc direct cleaning filter comprises a housing and a support frame arranged in the housing, wherein a white water inlet pipe is arranged at the upper part of one side surface of the housing, a drain pipe is arranged at the lower part of the other side surface, corresponding to the one side surface, of the housing, and a plurality of mutually parallel support frames are arranged between the white water inlet pipe and the drain pipe. Aiming at the papermaking one-machine platform, the multi-disc direct cleaning filter is a piece of novel equipment developed to recycle the white water and the fiber, the equipment achieves the fiber recovery rate of morethan 99.5% by using a metal fiber filter disc, almost no fiber is lost, the clarity of a super clear filtrate is up to more than 99%, and the content of suspended solids in the super clear filtrate is less than 20 mg / L. The multi-disc direct cleaning filter avoids the problem that the vacuum water leg is formed badly because of insufficient filtrate water caused by the number of discs and the blockage of meshes of a filter screen of the traditional multi-disc, and also solves the problems that a filter cake is thin, is poor in dryness and is difficult to peel because of the small vacuum suction force.

Description

technical field [0001] The invention relates to the field of filtering industrial sewage, papermaking white water, etc., in particular to a multi-disk direct-cleaning filter and a use method thereof. Background technique [0002] The white water produced in the traditional papermaking process contains a large amount of fine fibers and chemical residues. Enterprises spend a lot of money on the discharge of industrial sewage, pulp recovery and sewage treatment, which is a huge waste of material and financial resources. At present, most papermaking enterprises use multi-disc fiber recovery machines to recover fibers and water in white water. The multi-disc fiber recovery machine separates the fibers in the water from the water through the separation and filtration technology. The white water treatment of the paper machine produces three different liquids through the fiber cushion from thin to thick, namely turbid filtrate, clear filtrate, and ultra-clear filtrate. The turbid f...

AI Technical Summary

Problems solved by technology

[0005] However, the common problems of the multi-disc fiber recovery machine: the filter screen is easy to be damaged, and needs to be replaced every time it is shut down, the productivity is reduced, and the concentration of the filtrate is too high, causing a large amount of pulp loss and increasing the production cost; the dehydration effect is not good, the pulp layer is too high Thin, or no slurry layer can be formed, multi-disc discs are not cleaned cleanly, high-pressure nozzles are often blocked, and mechanical maintenance costs are expensive

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