Technology for making paper without sewage drainage and apparatus and adhesives

Abstract

The invention relates to a paper making process, device and adhesive. Its process: pulping-milling pulp-storing pulp-batching-desanding and deslagging-flowing pulp-wet-making paper-dehydrating-drying, where the batching working procedure adds the adhesive in a batching tank, the flowing pulp working procedure makes the paper pulp in a flowing pulp box formed into wet-made paper, and its main character: the sewage water circulating and recycling working procedure is behind the dehydrating working procedure. The conveyer belt of the paper maker adopts nylon net, and does need washing in running course, avoiding the pollution caused by washing water; the adhesive is prepared of starches, polyvinyl alcohol and polystyrene,has good flocculating effect on paper pulp, and thoroughly separates paper pulp from water, thus able to directly circulate and reuse the sewage water, and avoiding the pollution caused by sewage water discharge.

Description

technical field [0001] The invention relates to a papermaking process and device and its adhesive. Background technique [0002] The industrial sewage treatment of the paper industry is a problem that every paper company needs to solve, and it is also a difficult problem that the paper industry has not solved well. The technological process of paper production generally goes through: pulp crushing - refining - pulp storage tank - batching tank - sand removal and slag removal - headbox - wet papermaking - dehydration and drying - sewage treatment - sewage discharge. The pulp enters the batching tank from the pulp storage tank, and the pigments and adhesives required for different paper colors are added to make the pulp flocculate into a suspended state, and then enter the headbox after the sand and slag removal process. The pulp in the headbox is formed into wet paper by the paper machine. The paper machine of the traditional craft is located on the upper part of the headbo...

AI Technical Summary

Problems solved by technology

The paper machine of the traditional craft is located on the upper part of the headbox, and its conveyor belt adopts a felt, which absorbs the suspended flocculent pulp in the headbox and transports it out to form wet papermaking. After papermaking, the felt must be washed with clean water, otherwise the effect of absorbing pulp will be worse next time. The discharge of flushing water constitutes a major source of pollution in the papermaking process, and wastes water and materials.

In addition, the adhesive used in the traditional process is aluminum sulfate. The flocculation effect of this aluminum sulfate on the pulp is not thorough, so that the sewage contains about 1% pulp. Another major source of pollution with wasted material and increased investment