Papermaking sludge recycling process and equipment

Abstract

The invention discloses a papermaking sludge recycling process which comprises a flocculation step and a dispersion step in sequence. The flocculation step comprises the steps of directly adding a flocculating agent into paper pulp sewage discharged in the papermaking process, flocculating fine fibers in the paper pulp sewage into clusters, then separating the clusters from the sewage to obtain fiber cotton clusters, and entering the dispersion step; and the dispersion step comprises the following steps: mixing the fiber cotton clusters with a solution, adding a dispersing agent, so that the fiber cotton clusters are recovered to a fine fiber state, and then sieving and recycling the fiber cotton clusters to a papermaking process. According to the papermaking sludge recycling process and equipment, small fibers in sewage in the papermaking process are extracted and recycled to the papermaking process, sludge recycling is achieved, the sludge treatment problem is solved, and meanwhile the papermaking cost is reduced.

Description

technical field [0001] The invention belongs to the field of papermaking, and more specifically relates to a papermaking sludge recycling process and equipment. Background technique [0002] In the process of papermaking, a large number of fine fibers are lost and become sludge. The loss accounts for about 6-6.5% of the paper production. These fine fibers have a large surface area and are all plant fibers. They will be anaerobic in the water for a long time. Bacterial pollution turns into sludge, forming solid waste, which wastes a lot of raw materials, and more importantly, solid waste also seriously pollutes the environment. [0003] In the prior art, the utilization of papermaking sludge is mainly as organic fertilizer, incineration and landfill, etc. These treatment methods, on the one hand, are complex in process, high in cost, and cause environmental pollution. More paper production and environmental protection requirements. Contents of the invention [0004] The p...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a papermaking sludge recycling process and equipment, extract the small fibers in the sewage in the papermaking process, and reuse them in the papermaking process, realize sludge reuse, and solve the problem of sludge treatment problems, while also saving paper production costs

Images