Method for producing hard fiberboard through paper mill sludge

Abstract

The invention belongs to paper mill sludge treatment, and particularly relates to a method for producing a hard fiberboard through paper mill sludge. The method comprises the process steps of deodorization, pulp homogenizing, forming, drying and the like. The method solves the problems that in the prior art, the process is complex, cost is high and the environmental protection performance of products is poor. The method has the advantages of being capable of effectively utilizing industrial waste and low in production cost, enabling the products to meet the requirements of national standards, being good in environmental protection performance and low in price and the like.

Description

technical field [0001] The invention belongs to the treatment of papermaking sludge, in particular to a method for producing hard fiber boards by using papermaking sludge. Background technique [0002] With the continuous development of the paper industry, the treatment of papermaking wastewater has attracted increasing attention. Due to the large amount of fibrous substances in the papermaking wastewater, the sludge produced in the papermaking wastewater treatment is large and difficult to degrade. At present, the treatment method of papermaking sludge is still mainly landfill. , This method occupies a large area, and improper handling is likely to cause secondary pollution. [0003] The method of using papermaking sludge to produce fiberboard creates an economical and environmentally friendly treatment and disposal method for papermaking sludge terminal treatment, which not only solves the environmental pollution problem caused by papermaking sludge, but also realizes reso...

AI Technical Summary

Problems solved by technology

The medium-density fiberboard involved in the publication of the invention patent application with the application number 201120287116.X not only lacks the sludge odor treatment process, but also needs to add more textile fiber waste (5-30%) to the sludge. The amount is large, and the product is limited by the raw materials of textile fiber waste; the cardboard involved in the utility model patent 200920061449.3 has low strength and is suitable for making packing boxes and packing boxes; The strength of the cardboard is properly improved, but the dosage of short fibers is large, and the production is easily limited by the supply of short fibers. At the same time, the nature of the product belongs to the boxboard category, which is only suitable for industrial packaging, etc., not suitable for decorative inner panels, furniture manufacturing, etc. and other applications requiring higher performance

The aluminum sulfate added in the invention patent application with the application number 200510104235.6 belongs to the conventional dosing drug for paper sludge dewatering. The board making pressure is 0.3-0.6 MPa, which is small, and there are problems in the strength of the fiberboard production. Completely remove the sludge odor, need to add other deodorizing means

The invention patent application with the application number 201110404799.7 (publication number 102493287) needs to add a large amount of plant fibers to the fiber sludge during the production of boards (the ratio of fiber addition varies from 0.5-5:1), and the plant fibers need to be ground pulp or wire rolling equipment for pretreatment, the process is complicated, which increases the production cost of the plate from the production process and product raw materials

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