Sludge recovery and paper making method

Abstract

The invention discloses a sludge recovery and paper making method, belonging to the field of paper making. The method comprises the following steps: adding PAM (polyacrylamide) into sludge, and dewatering the sludge; filtering the dewatered sludge with a pressurized screen; stirring the sludge at the rotation speed of 1400-1500 r / min; adding composite microbes into the sludge, and carrying out fermentation; after the fermentation, filtering out the water, adding white water into the fermented sludge to regulate the concentration, detecting the sludge concentration by a sludge concentration transducer, and controlling the concentration at 4-6%; after regulating the concentration of the sludge, adding chemical raw materials (PAM, ammonium sulfate and sodium bentonite) into the sludge; after the chemical reaction, dissolving the sludge in water to obtain a suspension; and mixing the sludge with the pulp for paper making, and carrying out paper making. The sludge is activated after being sufficiently treated, and thus, can be better adsorbed to the fibers; and the sludge is added into waste paper pulp to make paper, thereby rationally utilizing the sludge and greatly protecting the environment.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a papermaking method for recycling sludge. Background technique [0002] More and more paper mills are beginning to use waste paper to make paper. Although waste paper is used reasonably, waste paper contains a lot of garbage. The process of making paper from waste paper will produce a lot of waste water, waste residue, and waste water. Containing a large amount of mud, sand and a large number of bacterial derivatives, it is called sludge. The current treatment methods for sludge are generally backfilling or incineration, which causes great pollution to the environment. Contents of the invention [0003] For this reason, it is necessary to provide a method for sludge recycling and papermaking. After a series of treatments such as pressure filtration, fermentation and deodorization, and white water concentration adjustment are performed on the sludge generated in the process of making...

AI Technical Summary

Problems solved by technology

[0002] More and more paper mills are beginning to use waste paper to make paper. Although waste paper is used reasonably, waste paper contains a lot of garbage. The process of making paper from waste paper will produce a lot of waste water, waste residue, and waste water. Containing a large amount of mud, sand and a large number of bacterial derivatives, it is called sludge. The current treatment methods for sludge are generally backfilling or incineration, which causes great pollution to the environment.

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