Low-cost and high-efficiency treatment technology for coking and semi-coke wastewater

A technology of semi-coke wastewater and treatment process, which is applied in water/sewage treatment, biological water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of high cost of semi-coke wastewater and poor treatment effect, and achieve saving Cost savings, low water vapor content, and reduced energy consumption
CN110498564APending Publication Date: 2019-11-26石家庄惠洁科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
石家庄惠洁科技有限公司
Publication Date
2019-11-26

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Abstract

The invention belongs to the technical field of wastewater treatment, and provides a low-cost and high-efficiency treatment technology for coking and semi-coke wastewater. The technology comprises thefollowing steps: S1, deoiling: removing coal tar and large-particle suspended oil and suspended matters in the coking and semi-coke wastewater to obtain deoiled coking and semi-coke wastewater; S2,performing high negative pressure enhanced gas stripping ammonia removal: carrying out high negative pressure enhanced gas stripping on the deoiled coking and semi-coke wastewater obtained in step S1 under -0.08 to -0.03 MPa at 35-50 DEG C in order to obtain gas phase ammonia and liquid phase wastewater; S3, performing adsorbing dephenolization: performing adsorbing dephenolization on the liquid phase wastewater obtained in step S2 by adopting an adsorbent to adsorb phenols in the wastewater in order to obtain dephenolized wastewater; and S4, biochemically treating effluent: biochemically treating on the dephenolized wastewater obtained in step S3, and discharging the treated water after reaching standards. The technology solves the problems of high cost and poor treatment effect of the coking and semi-coke wastewater in the prior art.
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Description

technical field

[0001] The invention belongs to the technical field of wastewater treatment and relates to a low-cost and high-efficiency treatment process for coking and semi-coke wastewater. Background technique

[0002] Coking plants are an important part of the production of iron and steel enterprises. Coke is an important raw material for iron and steel smelting, and the chemical products recovered from coking are supplied to the production of many industries. The main task of the coking plant is to carry out high-temperature dry distillation of coal-coking, and to recycle the by-products produced in the coking process. Coking wastewater is industrial wastewater containing volatile phenols, polycyclic aromatic hydrocarbons, oxygen, sulfur, nitrogen and other heterocyclic compounds produced during the high-temperature dry distillation, purification and recovery of by-products of coking and gas. It is a kind of industrial wastewater with high CODcr, high phenol value, hig...

Claims

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