A deep dehydration agent for solid phase sludge

Abstract

The invention discloses a deep dehydration agent for solid phase sludge. The dehydration agent is composed of the following substances in mass percentage: 5%-20% inorganic flocculant, 0.1%-1% seepage drag reducer, 79% ~94% solidified proppant, 0.1%~3% wall-breaking agent, among which the inorganic flocculant is polyaluminum chloride, polyferric sulfate, ferric chloride, aluminum sulfate, polyaluminum iron silicate, etc., seepage drag reducer is Polyethylene oxide, polydiallyl dimethyl ammonium chloride, acrylamide / sodium acrylate / diallyl dimethyl ammonium chloride copolymer, humic acid, etc., and the curing proppant is fly ash, Diatomaceous earth, perlite, etc., and the wall-breaking agent is potassium permanganate, potassium dichromate, calcium perchlorate, sodium percarbonate, etc. The dehydrating agent of the present invention is suitable for dehydrating the solid-phase sludge with a moisture content of about 80% directly to below 60% by secondary pressing and dehydration equipment such as a high-pressure belt machine, which avoids technical problems such as secondary dilution of the solid-phase sludge, and does not Contains lime and other components that are corrosive to high-temperature equipment and pollute the environment.

Description

technical field [0001] The invention belongs to the technical field of sludge dewatering agents, and specifically relates to municipal, landscape, industrial and other sludges. It is suitable for direct deep dehydration of solid phase sludge in the process of dehydrating solid phase sludge using high-pressure belt-type sludge deep dewatering machines and other devices. compound medicine. Background technique [0002] Sludge is solid, semi-solid and liquid waste generated during sewage treatment. With the acceleration of the industrial and urbanization process and the development of the sewage treatment industry, the volume and degree of sewage treatment have been continuously improved, and the resulting sludge output has been increasing day by day. It is estimated that the sludge output from municipal, industrial and landscape sewage treatment in China has exceeded 100 million tons per year. Sludge treatment is the implementation guarantee for the ultimate realization of se...

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Problems solved by technology

[0006] The purpose of the present invention is to aim at the solid-phase sludge after dewatering treatment by sludge dewatering equipment such as belt filter press, screw stacker, centrifuge, etc., which can only reach a moisture content of about 80%, which cannot meet the new 2018 water content of less than 60%. In order to meet the technical needs of sludge dehydration upgrading and upgrading technology, we provide a method that does not need to add water to dilute the solid phase sludge, and directly add it to the solid phase sludge with a moisture content of about 80%. Dehydration equipment such as screw machines and centrifuges can directly dehydrate the solid phase sludge for a second time and reduce the water content to less than 60%.

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