High-temperature and low-temperature drying comprehensive treatment method for papermaking sludge

Abstract

The invention belongs to the technical field of papermaking sludge drying, and particularly relates to a papermaking sludge high-temperature and low-temperature drying comprehensive treatment method, which comprises the following steps: S1, carrying out filter pressing on papermaking wet sludge generated after papermaking sewage treatment through a filter press to obtain papermaking sludge; s2, conveying the papermaking sludge obtained in the step S1 into a sludge pump through a single-screw conveyor or a double-screw conveyor, conveying the papermaking sludge to a sludge feeding machine through a pipeline by the sludge pump, and uniformly conveying the papermaking sludge into a high-temperature sludge drying machine through the sludge feeding machine, s3, the papermaking sludge is pushed by a spiral blade of the high-temperature sludge drying machine to move towards a discharging port of the high-temperature sludge drying machine, according to the papermaking sludge drying treatment method, high-temperature drying and low-temperature drying of the sludge are combined, the papermaking sludge drying effect is well improved, the water content of the papermaking sludge is reduced to 20% or below, and the drying effect of the papermaking sludge is improved. The deep drying of the papermaking sludge is realized.

Description

technical field [0001] The invention relates to the technical field of papermaking sludge drying, in particular to a comprehensive treatment method for high temperature and low temperature drying of papermaking sludge. Background technique [0002] With the development of the paper industry and the construction of pollution prevention and control facilities, the sludge generated after the papermaking wastewater is treated by the treatment facilities has become a new source of pollution. Except for some of these sludges that have been comprehensively utilized, the rest are disposed of in sanitary landfills. More than 70 mu of land needs to be landfilled every year, which wastes land resources and produces secondary pollution. Papermaking sludge is a biological solid waste, which not only contains a large amount of cellulose organic matter and plant nutrients such as nitrogen, phosphorus, and potassium, but also contains trace amounts of heavy metals and pathogenic bacteria. ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a comprehensive treatment method for high temperature and low temperature drying of papermaking sludge, so as to solve the problem that the papermaking sludge dehydration degree of the existing papermaking sludge drying treatment method proposed in the above background technology is limited and difficult to achieve The problem of deep drying of papermaking sludge with moisture content below 20%