Coal chemical sewage recycling treatment system

Abstract

The invention relates to a coal chemical sewage recycling treatment system. The system comprises a hydrolysis tank, an anoxic tank, an aerobic tank, a membrane tank and a reverse osmosis device, wherein the hydrolysis tank is communicated with the anoxic tank; the anoxic tank is communicated with the aerobic tank; the aerobic tank is communicated with the membrane tank; an aeration device is arranged in the aerobic tank; an active carbon adding device is arranged on one side of the aerobic tank; a membrane assembly is arranged in the membrane tank, one side of the membrane assembly is connected with the aeration device, and the other side of the membrane assembly is sequentially connected with a membrane water production device and a membrane tank water production tank; the membrane tank water production tank is communicated with the reverse osmosis device; and the membrane tank is provided with a sludge discharge pump, and the sludge discharge pump is communicated with the hydrolysis tank and the anoxic tank. The coal chemical sewage recycling treatment system can be used for coal chemical sewage recycling treatment, the equipment occupies small floor, the investment is low, the system has strong impact resistance, and the water quality of the discharged water is stable.

Description

technical field [0001] The invention relates to a coal chemical industry sewage reuse treatment system, which belongs to the technical field of sewage treatment and reuse. Background technique [0002] The existing coal chemical wastewater reuse treatment system is difficult to remove the chromogenic group organic matter contained in the sewage, and the effluent presents obvious chroma, which is difficult to meet the quality standard of the coal chemical wastewater reuse water, and cannot effectively delay the reverse osmosis membrane fouling of the system. Conducive to sewage reuse and environmental protection. [0003] At present, the reverse osmosis sewage advanced treatment technology generally chooses microfiltration or ultrafiltration membrane as the pretreatment of reverse osmosis. The color-developing organic matter that is difficult to remove in the pretreatment process enters the reverse osmosis device, adsorbs and precipitates on the surface of the reverse osmosi...

AI Technical Summary

Problems solved by technology

The color-developing organic matter that is difficult to remove in the pretreatment process enters the reverse osmosis device, adsorbs and precipitates on the surface of the reverse osmosis membrane or in the membrane pores, causing the membrane pore size to become smaller or clogged, which increases the water supply pressure and reduces the water flux. May cause deformation of membrane elements and cause mechanical damage

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