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Processing system of zinc and cyanide containing wastewater in iron and steel industry

A technology of iron and steel industry and treatment system, which is applied in the field of wastewater treatment devices, and can solve the problems that zinc-containing wastewater is difficult to work.

Inactive Publication Date: 2014-01-22
SHAANXI SHENGMAI PETROLEUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this type of wastewater contains many factors such as cyanide, chlorine, and sulfur that interfere with zinc precipitation, traditional chemical precipitation treatment methods are often difficult to work on zinc-containing wastewater

Method used

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  • Processing system of zinc and cyanide containing wastewater in iron and steel industry

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Experimental program
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Embodiment 1

[0008] The treatment system for zinc-containing and cyanide-containing wastewater in the iron and steel industry of the present invention comprises successively connected advection pools, a lifting pump room, an inclined plate pool, a sodium hypochlorite oxidation and hydroxide precipitation treatment pool, an artesian ditch, a primary water absorption well, and a secondary Suction well and pump room, where the inclined plate pool is also connected with the sludge treatment system, and the inclined plate pool is also connected with the sewage mixing pool and the sewage treatment plant in turn.

[0009] After adding the sodium hypochlorite oxidation and hydroxide precipitation treatment tank, the average total cyanide in the water sample at the outlet of the sewage mixing tank is 4.42 mg / L, and the average zinc ion is 14.71 mg / L, which can reach Q / 0HAB 801.1- 2009 (total cyanide ≤ 10 m∥L, zinc ion ≤ 30 m∥L) requirements.

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Abstract

The present invention relates to a wastewater processing device, and discloses a processing system of zinc and cyanide containing wastewater in iron and steel industry. The processing system of the zinc and cyanide containing wastewater in the iron and steel industry comprises successively connected an advection pool, a lifting pump house ,an inclined plate pool, a gravitational flow ditch, a first water suction well, a second water suction well and a pump house, the inclined plate pool is connected with a sludge treatment system, and the inclined plate pool is also connected successively with a sewage mixing pool and a sewage treatment plant, the processing system also includes sodium hypochlorite oxidation and hydroxide precipitation treatment pools which are successively connected with the inclined plate pool. After a period of time of practical application of the system in production fields, people detect that in a water sample of an outlet opening out of the sewage mixing pool, the average mass concentration of total cyanides is reduced to 4.42mg / L, the average mass concentration of zinc ion is 14.71 mg / L, and standard requests of internal industrial circulating water can be achieved.

Description

technical field [0001] The invention relates to a waste water treatment device. Background technique [0002] Blast furnace gas washing is to wash the gas from the top of the ironmaking blast furnace after being dedusted by the dry gravity dust collector through water washing to make it into clean gas, and then send it to the metallurgical plant for use as fuel. Due to the direct contact between the washing water and the gas, fine solid impurities (also known as gas mud), minerals and harmful substances in the gas also enter the water, resulting in water pollution. The treatment process of domestic blast furnace gas washing water includes precipitation, cooling, water circulation scale and corrosion inhibition treatment, sludge dehydration and utilization and other main processes. Among them, the sedimentation method mainly removes the suspended solids in the water, but it is not enough for the blast furnace gas washing wastewater discharged from the circulation treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM