System and method for treatment and recycling of coking phenol-cyanogen wastewater

Abstract

A system and a method for treatment and recycling of coking phenol-cyanogen wastewater are used for solving the problem of difficulty in recycling of existing coking phenol-cyanogen wastewater. The system is characterized by comprising a coking phenol-cyanogen wastewater biochemical pretreating subsystem and a three-membrane method deep treating subsystem connected with same. The coking phenol-cyanogen wastewater biochemical pretreating subsystem comprises an anaerobic biological membrane reactor, an anoxic biological membrane reactor and aerobic biological membrane reactor in sequential connection, wherein the aerobic biological membrane reactor is connected with a horizontal flow sedimentation tank which is further connected with a coagulation reaction tank, and the coagulation reaction tank is connected with an oblique-plate sedimentation tank which is in connection with a first middle water tank. The three-membrane method deep treating subsystem comprises a ceramic membrane filter, an ultrafiltration membrane filter and a nanofiltration membrane filter, wherein the ceramic membrane filter is connected with the first middle water tank and further connected with the ultrafiltration membrane filter through a second middle water tank, and the ultrafiltration membrane filter is connected with the nanofiltration membrane filter through a third middle water tank.

Description

technical field [0001] The invention relates to the field of coking phenol cyanide wastewater treatment, in particular to a coking phenol cyanide wastewater treatment and reuse system and method, which are used to solve the problem that the existing coking phenol cyanide wastewater is difficult to reuse. Background technique [0002] Coking phenol cyanide wastewater is the wastewater produced in the process of coal coking, gas purification and coking by-products processing and refining. It is a wastewater containing high concentration of phenol and cyanide. Industrial wastewater containing refractory organic pollutants. This waste water mainly comes from four parts: residual ammonia water, crude benzene separation water, final cooling surplus water, and tar separation water. The amount of wastewater is large and the composition of water quality is complex. In addition to high concentrations of phenol, cyanide, oil, ammonia nitrogen, etc., it also contains polycyclic or hete...

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Problems solved by technology

[0003] Aiming at the defects or deficiencies in the prior art, the present invention provides a coking phenol cyanide wastewater treatment and reuse system and method, which are used to solve the problem that the existing coking phenol cyanide wastewater is difficult to reuse

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