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Method for treating coking wastewater

A treatment method and technology for coking wastewater, which are applied in the fields of metallurgical wastewater treatment, chemical instruments and methods, flotation water/sewage treatment, etc. Small footprint, air saving, high volume load effect

Inactive Publication Date: 2010-02-10
何庆
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, it is more common to use biological methods to treat coking wastewater, but only using biological methods to treat coking wastewater has poor treatment effects, and the treated sewage cannot meet the national industrial water discharge standards and cannot be discharged directly

Method used

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  • Method for treating coking wastewater

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Embodiment Construction

[0013] (1) All kinds of wastewater in the factory are discharged into the advection grease trap through the sewage pipeline. The grease trap is equipped with an oil scraper to regularly remove the oil floating on the surface. The residence time of the grease trap is 2 hours. Floating system degreasing;

[0014] (2) The effluent of the air flotation system flows into the wastewater mixing adjustment tank to balance the water quality and quantity, and the residence time is 8 hours;

[0015] (3) The effluent from the mixing adjustment tank is treated by the lift pump into the VTBR biological oxidation tower to remove most of the COD, remove phenol, cyanide and other harmful substances, and denitrify through nitrification and denitrification. The VTBR biological oxidation tower adopts a closed fixed-film biochemical reactor, which can realize both aerobic and anaerobic processes. The VTBR biochemical reaction tower is a steel tower container with a monomer diameter of 9 meters an...

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Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for treating coking wastewater. The invention provides the method for treating the coking wastewater, which has the advantages of simple operation, low cost and good treatment effect and can directly discharge effluent. The invention adopts the following technical scheme that (1) various wastewaters in a factory are discharged into a horizontal oil isolating tank through sewage pipelines, the oil isolating tank is provided with an oil scraper which periodically removes floating oil on thesurface, and the effluent of the oil isolating tank enters an air floating system for oil removal; (2) the effluent of the air floating system automatically flows into a wastewater mixing regulationtank to balance the water quality and water quantity; (3) the effluent of the mixing regulation tank enters a VTBR biological oxidation tower through a lift pump to be treated, most of COD is removed,phenol, cyanogen and other harmful substances are removed, and nitrogen is removed through nitration and denitrification; (4) the effluent enters a secondary sedimentation tank; and (5) the effluententers a sand filter and an active carbon adsorption device, then enters an ultra-filtration and reverse osmosis apparatus, and is discharged after reaching the standard.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a treatment method for coking wastewater. Background technique [0002] Coking wastewater is produced in the process of high-temperature dry distillation of raw coal, gas purification and refining of chemical products. Its composition is complex, containing dozens of inorganic and organic compounds. Inorganic compounds are mainly a large amount of ammonia salt, thiocyanide, sulfide, cyanide, etc.; in addition to phenols, organic compounds also have monocyclic and polycyclic aromatic compounds, heterocyclic compounds containing nitrogen, sulfur, and oxygen. Wait. Coking wastewater includes phenol-cyanide-containing wastewater generated during the gas purification process, gas pipeline condensate, laboratory drainage, etc. The volume of waste water is 300 cubic meters per hour, and it operates 24 hours a day, that is, 7200 cubic meters per day. Coking wastewater co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/40C02F1/24C02F3/30C02F1/52C02F1/28C02F1/44C02F103/16
Inventor 何庆
Owner 何庆
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