A sewage pre-filter device and its application

Abstract

The invention relates to a sewage water pre-filtering device, which comprises a water storage tank, wherein a light impurity outlet and a sludge outlet are arranged at two ends of the water storage tank respectively; a sewage water inlet is arranged at the top of the water storage tank; a clean water outlet is arranged at the bottom of the water storage tank; a conical filter cloth screen cylinder is axially arranged in the water storage tank; a ladder-shaped rotor is arranged in the conical filter cloth screen cylinder; and brush hairs are arranged on the two inclined edges of the ladder-shaped rotor. According to the sewage water pre-filtering device, papermaking sewage water is intercepted by utilizing the interaction effect of the conical filter cloth screen cylinder and the ladder-shaped rotor, impurities with different densities in the papermaking sewage water are effectively separated under the action of the brush hairs, the light impurities in the papermaking sewage water are discharged along the light impurity outlet, sludge in the papermaking sewage water is discharged along the sludge outlet, and the papermaking sewage water after removal of the light impurities and the sludge is filtered along filter cloth of the conical filter cloth screen cylinder, flows into the water storage tank and is finally discharged along the clean water outlet at the bottom of the water storage tank.

Description

technical field [0001] The invention relates to a sewage pre-filtering device and its application, and belongs to the technical field of devices for treating papermaking sewage. Background technique [0002] The paper industry uses wood, straw, reeds, rags, etc. as raw materials, and cellulose is separated by high-temperature and high-pressure cooking to make pulp. In the production process, the non-cellulose part of the raw material is finally discharged to become papermaking black liquor. The black liquor contains lignin, cellulose, volatile organic acids, etc., which has an odor and is highly polluting. Papermaking wastewater mainly comes from the two production processes of pulping and papermaking in the papermaking industry. Pulping is to separate the fibers in the plant raw materials, make pulp, and then bleach it. This process will generate a lot of papermaking wastewater; papermaking is to dilute, shape, squeeze, and dry the pulp to make paper. The process is also...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this patent is that the processing machine is in the shape of a vertically arranged barrel, with brushes installed axially inside it, but due to the effect of gravity, the sewage entering the barrel will not be effectively filtered, and the sewage will be retained and filtered in the The time in the barrel is too short, which greatly affects the pretreatment effect of sewage

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