Papermaking wastewater treatment device capable of improving paper pulp recovery rate

Abstract

A papermaking wastewater treatment device capable of improving the paper pulp recovery rate, disclosed in the invention, comprises a sedimentation tank, the far end of the sedimentation tank is communicated with two transparent U-shaped pipelines, the other ends of the two transparent U-shaped pipelines are communicated with a paper pulp extraction assembly, and a solarization assembly is connected between the sedimentation tank and the paper pulp extraction assembly; a filtering piece is connected into the sedimentation tank; and the outer wall of the sedimentation tank is connected with a driving part, and the driving part synchronously drives the filtering part and the solarization assembly. Under the power of the driving part, the solarization assembly is synchronously driven to solarize the two transparent U-shaped pipelines, papermaking wastewater containing a dispersing agent in the transparent U-shaped pipelines is conveniently decomposed, and filtration and propulsion are synchronously carried out in the sedimentation tank, so decomposed papermaking wastewater is filtered and extracted through a paper pulp extraction assembly. The filtered papermaking wastewater is irradiated at high temperature, so that the paper pulp dispersing agent in the papermaking wastewater is conveniently decomposed, filtered and separated out, and the paper pulp recovery during papermaking wastewater treatment is improved.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a papermaking wastewater treatment device for improving the pulp recovery rate. Background technique [0002] my country's paper industry mostly uses grass stalks, wood pulp, etc. as papermaking raw materials. Pulping and papermaking production generally consists of pulping, pulp washing, bleaching, and papermaking processes. Pulping in the papermaking industry includes alkaline pulping, chemical mechanical pulping and pulping. Mechanical pulping. According to different pulping methods, different raw materials, different pulping yields, different types of papermaking, and whether there is chemical recovery, the wastewater has great differences in the occurrence and discharge of pollutants, but basically they all contain a large amount of suspended solids and BOD, COD and some toxic substances are usually still treated by combining physical, chemical and biological methods. Th...

AI Technical Summary

Problems solved by technology

The added additive is called paper-making dispersant. The main paper-making dispersant is polyacrylamide, because most of the pulp is filtered out after precipitation, but some pulp containing dispersant is easily soluble in water to form a high-viscosity liquid. Filtrated out, accompanied by subsequent air flotation machine treatment, and decolorization and flocculation, after secondary treatment, sludge is discharged, causing part of the dissolved pulp to form sludge and discharged, so that part of the dissolved pulp after the initial filtration is accompanied by the filtered pulp The discharge of papermaking wastewater is not conducive to fully recovering the pulp dissolved in the dispersant in the papermaking wastewater. For this reason, we have proposed a papermaking wastewater treatment device that improves the pulp recovery rate.

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