Suspension polymerization process high-salt organic wastewater recycling treatment process

Abstract

The invention relates to a suspension polymerization process high-salt organic wastewater recycling treatment process which comprises a pretreatment system, a primary oxidation system, a biochemical oxidation system, a deep oxidation system, a polyvalent metal ion separation system and a membrane concentration system; concentrated water of the polyvalent metal ion separation system flows back to the pretreatment system; the membrane concentration system generates membrane concentration concentrated water and membrane concentration fresh water; one part of membrane concentrated fresh water flows back to the front end of the biochemical oxidation system, and the other part is discharged; and the membrane concentration concentrated water is recycled to the suspension polymerization process. According to the suspension polymerization process high-salt organic wastewater recycling treatment process, generation of a large amount of carnallite solid waste can be avoided, the agent cost and the solid waste treatment cost are reduced, and a mode of coupling chemical oxidation and biochemical treatment is adopted so that the operation cost can be reduced, and the economical efficiency can be improved.

Description

technical field [0001] The invention relates to a high-salt wastewater reuse treatment process, in particular to a suspension polymerization process high-salt organic wastewater reuse treatment process. Background technique [0002] The production process of suspension polymerization is mainly to add monomers, water, initiators, dispersants, etc. into the reactor, and the polymerization reaction occurs under certain conditions, and the product is obtained by centrifugal drying. Common industrial products prepared by suspension polymerization process include polyvinyl chloride resin, polystyrene resin, fluororesin, ABS resin, styrene-butadiene rubber, thermal expansion microspheres, etc. In the free radical suspension polymerization process, the polarity of the solution is usually increased by adding salt ions such as sodium chloride to the water phase, so that the solubility product difference between the polymer and the solvent is greater, reducing the solubility, and allow...

AI Technical Summary

Problems solved by technology

The incineration method can completely oxidize and decompose organic matter into carbon dioxide and organic matter at high temperature, but there are problems of high operating costs, high salt corrosion of equipment, and release of dioxins to cause air pollution

Evaporation and crystallization process is widely used in high-salt wastewater recycling and zero-discharge treatment, but for salt-containing systems with high organic content, organic matter will be entrained in the crystallized salt, and even crystallization equipment will be blocked and the salt cannot be produced.

The advanced oxidation process increases the degradation rate of organic matter by generating hydroxyl radicals. It is suitable for high-salt systems and has a high organic matter degradation rate. Common advanced oxidation processes include electrocatalytic oxidation, ozone catalytic oxidation, catalytic wet oxidation, photocatalytic oxidation, etc., but for High-concentration organic matter systems have problems such as high investment and operation costs, and harsh control of reaction conditions.

The biochemical oxidation method has the characteristics of low operating cost, but ordinary activated sludge is sensitive to toxic substances in high-salt systems and industrial wastewater, and has poor biological tolerance, so pretreatment is required to improve biodegradability

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