Coking waste water zero discharge treatment process

A technology for coking wastewater and treatment process, which is applied in water/sewage treatment, multi-stage water/sewage treatment, degassed water/sewage treatment, etc., to achieve the effect of reducing costs and reducing the amount of treated water

Inactive Publication Date: 2007-04-18
CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

At present, the reuse of coking wastewater at home and abroad has not yet been reported and industrialized. With the reuse of wastewater receiving more and more attention from all aspects, research on the treatment and reuse of coking wastewater will become a development trend in the future.

Method used

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  • Coking waste water zero discharge treatment process

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specific Embodiment

[0017] A coking plant 50m 3 / h coking wastewater zero discharge treatment process:

[0018] 1. The coking wastewater first enters the ammonia distillation unit, adds sodium hydroxide to adjust the pH=12, heats the ammonia, and recovers ammonium sulfate at the same time. The content of ammonia nitrogen in the effluent is 815mg / L, the content of phenol is 907mg / L, and the content of cyanide is 48mg / L. L, COD is 3730mg / L.

[0019] 2. The effluent from ammonia distillation directly enters the biochemical reaction tank without dilution, and biodegrades ammonia nitrogen, phenol, cyanide, COD and other pollutants. The content of ammonia nitrogen in the treated water is 111mg / L, the content of phenol is 232mg / L, and the content of cyanide is 0.78mg / L, COD is 540mg / L.

[0020] 3. The biochemical effluent is reused for steelmaking converter dust removal. Converter dust and flue gas are further degraded through adsorption, catalytic oxidation, etc. under high temperature conditions of...

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Abstract

The present invention relates to a pyrogenic waste water zero discharge treatment process. It is characterized by that said process includes the following steps: making the pyrogenic waste water undergo the process of primary ammonia distillation treatment, then making biochemical treatment, and making the treated waste water be directly returned into the dust-removing system of steel-smelting converter, utilizing converter smoke dust and flue gas to further degrade the pollutants of amino nitrogen, phenol, cyanogens and COD in the pyrogenic waste water under the high temperature condition, and making the discharged water undergo the processes of flocculating settling, filtering and water quality stabilization so as to attain the discharge requirement.

Description

technical field [0001] The invention relates to a zero-discharge treatment process for coking wastewater, which belongs to the technical field of environmental protection. Background technique [0002] Coking wastewater has a large amount of water, complex pollutants, high concentration, and deep color. Among them, inorganic substances generally exist in the form of ammonium salts. In addition to about 85% of phenolic compounds, the organic components also include cyanide, inorganic fluoride ions, polycyclic aromatic hydrocarbons and Highly toxic, carcinogenic and mutagenic substances such as heterocyclic compounds. Coking wastewater is a kind of industrial wastewater that is recognized as difficult to biodegrade. The difficulty of its treatment lies in the poor biodegradability of wastewater, cyanide, polycyclic aromatic hydrocarbons and heterocyclic compounds are difficult to biodegrade, and high concentrations of ammonia nitrogen have little effect on the activity of micr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/20C02F1/52C02F1/58
Inventor 操卫平冯玉军李自树谢陈鑫夏雨
Owner CHENGDU ORGANIC CHEM CO LTD CHINESE ACAD OF SCI
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