Treatment process for industrial wastewater

A technology for treating process and industrial wastewater, applied in multi-stage water treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc. It can solve problems such as operator poisoning, sulfur easily exceeding the standard, and pollute the environment, so as to reduce the number of employees. Labor intensity, saving raw materials and labor costs, and improving economic benefits

Inactive Publication Date: 2018-12-07
汉源四环锌锗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following disadvantages in wastewater treatment using the medium method: the sulfur in the treated water is easy to exceed the standard, and there will be black attachments attached to the chute, which is difficult to clean up; the waste residue produced by the treated water has high sulfur content, high viscosity, and is difficult to press The consumption of filter cloth for filter and press filter is high; the hydrogen sulfide gas produced by the feeding reaction is likely to poison the operator and pollute the environment

Method used

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  • Treatment process for industrial wastewater
  • Treatment process for industrial wastewater

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Embodiment 1

[0016] This embodiment provides an industrial wastewater treatment process, including: discharging the wastewater through a regulating tank, a neutralization tank, an aeration oxidation tank, a coagulation reaction tank, a sedimentation tank, a filter tank, and a pH callback tank in sequence: wherein, the detection If zinc is contained in the waste water, lime with a particle size of 70 mesh after slurry is added to the coagulation reaction tank to adjust the pH of the reaction solution to 7; sulfuric acid is used to adjust the filtrate to pH 6 in the pH callback tank.

Embodiment 2

[0018] This embodiment provides an industrial wastewater treatment process, including: discharging the wastewater through a regulating tank, a neutralization tank, an aeration oxidation tank, a coagulation reaction tank, a sedimentation tank, a filter tank, and a pH callback tank in sequence: wherein, the detection If zinc is contained in the waste water, slurryed lime with a particle size of 90 mesh is added to the coagulation reaction tank to adjust the pH of the reaction solution to 8; sulfuric acid is used to adjust the filtrate to pH 9 in the pH callback tank.

Embodiment 3

[0020] This embodiment provides an industrial wastewater treatment process, including: discharging the wastewater through a regulating tank, a neutralization tank, an aeration oxidation tank, a coagulation reaction tank, a sedimentation tank, a filter tank, and a pH callback tank in sequence: wherein, the detection If cadmium is contained in the waste water, lime with a particle size of 80 mesh after slurry is added to the coagulation reaction tank to adjust the pH of the reaction solution to 9; sulfuric acid is used to adjust the filtrate to pH 7 in the pH callback tank.

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Abstract

The invention belongs to the technical field of wastewater treatment and provides a treatment process for industrial wastewater. The treatment process for industrial wastewater comprises the steps ofguiding the wastewater into a regulating tank, a neutralizing tank, an aeration oxidation tank, a coagulating reaction tank, a settling tank, a filtering tank and a pH retracing tank in turn and thendischarging. The treatment process is characterized in that slurry lime is added into the coagulating reaction tank and is used for regulating pH of a reaction solution to 7-10. According to the treatment process for industrial wastewater, sulfur content in waste residue is reduced, discharging of sulfide is reduced, usage of filter cloth is reduced, the raw material SO2 and labor cost are saved,environmental pollution is relieved, energy is saved, consumption is reduced, labor intensity of workers is relieved and economic benefit is promoted.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an industrial wastewater treatment process. Background technique [0002] A large amount of washing wastewater will be discharged during hydrometallurgy zinc smelting. Washing wastewater is highly acidic and has many heavy metal ions, especially lead, zinc, cadmium and other ions seriously exceeding the standard. The most important pollutant in smelter production wastewater is acid. In the prior art, the most commonly used treatment process is to adopt the method of processing, including: adding neutralizer to industrial wastewater to adjust the pH of the wastewater to 6-8, and then adding collector sodium sulfide to remove Zinc, lead, cadmium and other metal elements are separated by precipitation and filtration. There are the following disadvantages in the wastewater treatment by the middle method: the sulfur in the treated water is easy to exceed th...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F1/001C02F1/52C02F1/66C02F1/74C02F9/00C02F2001/007C02F2301/08
Inventor 罗万香
Owner 汉源四环锌锗科技有限公司
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