Chemical agent for treating and recycling paper sludge and treating method thereof

Abstract

The present invention relates to chemical agents for treating and recycling paper sludge and a treating method thereof. A sludge cleaning agent HB-E001 of the invention is prepared from 50 parts of CS-8 dissolved in deionized water, 20 parts of acrylamide, 4 parts of modified bentonite, 1 part of magnetized pig iron powder and 25 parts of aluminium sulfate. A sludge activator HB-E002 is prepared from 50 parts of CS-8 dissolved in deionized water, 30 parts of acrylamide, 18 parts of double octadecyl dimethyl ammonium chloride, 1 part of chitosan and 1 part of magnetized pig iron powder. A sludge reinforcing agent HB-E003 of the invention is prepared from 45 parts of deionized water, 30 parts of amphoteric polyacrylamides, 20 parts of modified starch, 4 parts of polyamide chloropropylene oxide resin and 1 part of guar gum. The chemical agents and the method provided by the invention have the advantages of overcoming defects of rising water concentration COD, SS, inorganic salt, conductivity and the like existed in the prior waste treatment, saving raw materials per ton paper by 6-6.5 per cent, reducing enterprise cost greatly, changing waste treatment of enterprise into initiative waste treatment because of an especially high additional value, saving resources and protecting environment simultaneously.

Description

technical field [0001] The invention relates to sludge treatment in the papermaking industry, in particular to a papermaking sludge recycling agent and a treatment method. 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 small fibers have a large surface area and are organic matter. They will be polluted by anaerobic bacteria in the water for a long time Instead, it turns into sludge and forms solid waste, which wastes a lot of raw materials. More importantly, solid waste also seriously pollutes the environment. [0003] Prior to the present invention, the methods for solid waste treatment were mainly as follows. One is to pass the solid waste through a filter press to remove 25-40% of the water in the solid waste before transporting it to landfill and incineration. This method not only wastes raw materials but also pollutes groundwater and...

AI Technical Summary

Problems solved by technology

One is to pass the solid waste through a filter press to remove 25-40% of the water in the solid waste before transporting it to landfill and incineration. This method not only wastes raw materials but also pollutes groundwater and the atmosphere; the other is to make solid waste into mud boards. About 30% of the sludge produced by the industry is used, and the added value is also very low. The gross profit margin is about 15%, and the profit after deducting the processing costs is only about 2%. Since the market demand for mud boards is very small, the excess 70% solid waste It is still landfill and incineration, which is also a waste of resources and pollutes the atmosphere; the third is to process solid waste into farmland organic fertilizers. Since there are a large number of professional farmers’ fertilizers and chemical fertilizers for poultry and livestock in rural areas, these fertilizers are lower in quality than Solid waste processing organic fertilizers are expensive, and the price is lower than this kind of fertilizers. Therefore, it is difficult to realize promotion, and the result is still landfill and incineration; Fourth, in the production system, high-molecular organic polyacrylamide is used for retention, so that some Solid waste remains in the paper, but 50% of the escape rate is in the system water during the addition process, which increases the water concentration of COD, SS, inorganic salts, conductivity, etc. in the production system, resulting in a decline in production output and quality , The vicious cycle of escaped sludge in the water system increases the pressure of wastewater treatment. It is difficult for enterprises to meet the standards for treated water, and the remaining sludge is still press-filtered, landfilled and incinerated; the fifth is the method of reusing sludge after treatment for paper In the high level tank, the loss rate of sludge reuse is more than 20%. The lost part of the sludge is still incinerated, and at the same time it will cause a vicious cycle in the water body. In severe cases, the water quality will stink. The fatal weakness of this reuse method is limited to low speed For paper machines and low-grade paper, for paper and cardboard with higher requirements, this method will have a significant impact on physical indicators, such as ring pressure, folding resistance, burst resistance, thickness and stiffness, etc., resulting in a decline in quality. , the company suffered heavy losses

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