Integrated treatment system for recycling strong brine in coking wastewater and process thereof

Abstract

The invention provides an integrated treatment system for recycling strong brine in coking wastewater and a process thereof. The integrated treatment system comprises an efficient sedimentation tank system, an advanced oxidation system, a multi-medium filtration system, an ultrafiltration system, a resin softening system, a primary reverse osmosis system, a nanofiltration system, a concentrated water reverse osmosis system, a high-pressure reverse osmosis system, an industrial salt evaporative crystallization system and a mother liquor drying system which are connected in sequence; the nanofiltration system is also connected with a nitrate evaporative crystallization system, and the nitrate evaporative crystallization system is also connected with the mother liquor drying system; the primary reverse osmosis system, the concentrated water reverse osmosis system and the high-pressure reverse osmosis system are respectively connected with a secondary reverse osmosis system; by adopting the scheme, the problems that COD / silicon dioxide is high in content and difficult to remove, the quality of crystal salt is low, the amount of impurity salt is large and the like can be effectively solved, water for a coking production process, a sodium chloride product and a sodium sulfate product are finally formed, and the purposes of zero emission and recycling after coking wastewater treatment are effectively achieved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an integrated treatment system and process for recycling concentrated brine in coking wastewater. Background technique [0002] The coking plant mainly produces chemical products such as coke, commercial gas, ammonium sulfate and light benzene; tar processing adopts two-tower continuous distillation in a tubular furnace, and the industrial naphthalene production process is double-furnace and double-tower continuous distillation, washing and refining; in the coke oven gas During cooling, washing, crude benzene processing and tar processing, industrial wastewater containing phenol, cyanide, oil, ammonia and a large amount of organic matter is produced. my country attaches great importance to the development of coking production technology, and has a certain production scale; however, a large amount of wastewater will be discharged during the coking producti...

AI Technical Summary

Problems solved by technology

[0020] The purpose of the present invention is to address the deficiencies in the above-mentioned technologies, and propose an integrated treatment system and process for recycling concentrated brine in coking wastewater, aiming at solving the problems of existing coking wastewater treatment

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