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A kind of treatment technology of phenol cyanide sewage

A treatment process and sewage technology, applied in the field of phenol cyanide sewage treatment process, can solve the problems of cumbersome operation and management, difficult degradation of organic matter, environmental pollution, etc., and achieve the effect of simple operation and management, eliminating influence and reducing difficulty.

Active Publication Date: 2017-05-17
广东云测环境科技有限公司
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Problems solved by technology

Since most of the organic pollutants in sewage are macromolecular ring-like organic compounds, these organic compounds are difficult to be degraded by good microorganisms, and the effluent NH 3 -N, COD, etc. are difficult to meet the requirements of the "Steel Enterprises Iron and Steel Industry Water Pollutant Discharge Standard" (referred to as the standard), and the cost of sewage treatment is high, the operation and management are cumbersome, and the treated water is easy to cause environmental pollution.

Method used

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  • A kind of treatment technology of phenol cyanide sewage

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Embodiment Construction

[0019] Below in conjunction with embodiment the present invention is further described.

[0020] see figure 1 , a treatment process for phenol cyanide sewage, its processing steps are:

[0021] The first step: first add sodium hypochlorite to phenol cyanide sewage, sodium hypochlorite is an effective method to remove cyanide ions and their compounds in sewage, under the condition of proper pH control, add NaClO solution to wastewater to make CN - is oxidized to CO 2 and N 2 , the response is as follows:

[0022] CN - +ClO - +H 2 O→CNCl+2OH -

[0023] CNCl+2OH - →CNO - +Cl - +H 2 o

[0024] 2CNO - +3ClO - →CO 2 ↑+N 2 ↑+3Cl - +CO 3 2-

[0025] Sodium hypochlorite is a strong oxidizing agent, which can remove most of the organic matter in phenol cyanide wastewater, reducing the difficulty of subsequent biochemical treatment;

[0026] The second step: add ferrous sulfate to the phenolic cyanide wastewater after a period of reaction in the first step, and exce...

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Abstract

The invention relates to a treatment process for phenol-cyanogen wastewater. According to the treatment method, pretreatment of a biochemical reaction tank is enhanced, and cyanogen and a greater part of organic matters are removed through a chemical method; through double-film treatment, wastewater without cyanogen and the greater part of organic matters is divided into a clear liquid and a concentrated liquor, the clear liquid does not contain impurities such as organic matters basically, and can be used as production water for other workshops; the concentrated liquor is subjected to biochemical treatment continuously, part of water from a biochemical pool is used for coke quenching; the other part of water from the biochemical pool is treated further, so that the water can reach the standards to be discharged. The treatment process has the advantages that the wastewater treatment cost is low, the operation and maintenance are simple, and the discharged treated water cannot cause pollution any more.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and relates to a process for treating phenol-cyanide sewage. Background technique [0002] Coking plants in the metallurgical industry mainly provide coke and gas to ironmaking, steelmaking, steel rolling and other production plants, and at the same time recover various chemical raw materials such as tar, benzene, and phenol. During coke oven gas removal of naphthalene, desulfurization, ammonia removal, final cooling and debenzene purification, each process produces some sewage containing phenol, cyanide and ammonia nitrogen——phenol cyanide sewage. Phenolic cyanide sewage mainly includes coking production sewage, ammonia distillation sewage, CDQ boiler supporting desalination water station sewage, circulating water system sewage, domestic sewage and initial rainwater, etc. Among them, coking production sewage and ammonia distillation sewage contain a large amount of Toxic substances such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 彭娟夏小银胡胜斌
Owner 广东云测环境科技有限公司
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