Deep dehydration reagent for solid-phase sludge

Abstract

The invention discloses a deep dehydration reagent for solid-phase sludge. The dehydration reagent is composed of the following components: in percent by mass, 5-20% of an inorganic flocculant, 0.1-1%of a seepage drag-reducing agent, 79-94% of a curing proppant and 0.1-3% of a wall breaking agent, wherein the inorganic flocculant comprises polyaluminum chloride, polyiron sulfate, ferric chloride,aluminum sulfate, polyaluminum ferric silicate and other components, and the seepage drag-reducing agent comprises polyethylene oxide, polydiallyldimethylammonium chloride, acrylamide / sodium acrylate / diallyldimethylammonium chloride copolymer, humic acid and other components, and the curing proppant comprises fly ash, diatomaceous earth, perlite and other components; and the wall breaking agent comprises potassium permanganate, potassium dichromate, calcium perchlorate, sodium percarbonate and other components. The dehydration reagent is suitable for secondary squeeze dehydration of the solid-phase sludge from a water content of about 80% to 60% or below through direct adoption of a high-pressure belt machine and other squeeze dehydration devices, the technical problem of secondary dilution of the solid-phase sludge can be solved, and no lime and other components which have corrosion and pollution to high-temperature equipment are contained.

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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