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Advanced treatment and quality-divided recycling method of comprehensive smelting sewage

A technology of advanced treatment and quality separation and reuse, which is applied in the fields of metallurgical wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. In order to reduce fresh water consumption, run stably and improve recycling rate

Active Publication Date: 2015-06-03
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, due to the complexity and instability of smelting wastewater (such as gas washing water and coking wastewater, with high organic content and benzene rings such as phenol and cyanide), reverse osmosis membrane technology has not been widely used in the field of smelting wastewater reuse. There is no mature technology

Method used

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  • Advanced treatment and quality-divided recycling method of comprehensive smelting sewage
  • Advanced treatment and quality-divided recycling method of comprehensive smelting sewage
  • Advanced treatment and quality-divided recycling method of comprehensive smelting sewage

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Experimental program
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Embodiment Construction

[0030] Raw water source: comprehensive sewage from smelting production. Raw water quality: pH is 6-9, SS is 300-500, conductivity μs / cm is 3000-4000, SiO 2 (mg / L) is 20, total hardness (mg / L) is 1000-2200, calcium hardness (mg / L) is 800-1800, alkalinity (mg / L) is 100-200, sulfate radical (mg / L) ) is 500-800, chloride (mg / L) is 200-600, iron (mg / L) is 1-5, oil (mg / L) is 50, COD (mg / L) is 40-80.

[0031] Pretreatment system

[0032] The purpose of the pretreatment system is to remove most of the suspended solids, colloids, and some organic matter in the water, so that the effluent water quality can reach circulation, reduce the burden on the pretreatment system and improve the quality of the produced water.

[0033] The pre-treatment system includes: sewage collection and regulating channel, radial flow sedimentation tank system, air flotation reaction tank, air flotation tank, fiber ball filter system, and sludge treatment system.

[0034] The sewage collection and regulatin...

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Abstract

The invention relates to an advanced treatment and quality-divided recycling method of comprehensive smelting sewage and belongs to the field of industrial sewage treatment. According to the method disclosed by the invention, the normal operation of a subsequent advanced treatment system is ensured by adopting a radial flow sedimentation tank+air floatation reaction tank+air floatation tank process and a fiber ball filtering process for previous treatment and adopting an ecological regulating tank+aeration oxidization+high-density sedimentation tank+V-shaped filter tank process for pretreatment, an ultrafiltration+first-stage reverse osmosis+second-stage reverse osmosis process is used as an advanced treatment system, the chemical agent addition is reasonably and efficiently controlled, the key operation parameters are regulated and controlled, the accessory system is optimized, the smelting sewage is treated to the standard of circulating water, first-stage demineralized water and second-stage demineralized water, the smelting sewage is recycled and the system runs stably and reliably.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment. Background technique [0002] In recent years, with the continuous development of my country's social economy, the metallurgical industry has developed rapidly, and the water consumption of the metallurgical industry has also continued to increase, making it a major water consumer. [0003] The industrial water used by iron and steel enterprises is mainly cooling water, followed by gas washing and dust removal water, and part of it is production process, washing equipment, ground and other water. Water consumption currently accounts for about 14% of the country's total consumption. Industrial water use not only determines the effect of water use in the industry and the quality of final products, but also determines the degree of impact on the surrounding water environment, that is, it is closely related to the economic benefits and environmental effects of the metallurgical industry. ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/16
Inventor 贺占超赵瑞峰杨艾花王瑞红王颖
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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