Method for regulating and controlling water quality and reducing air pollution in recirculated water acidulous operation condition

A technology for operating conditions and air pollution, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of air pollution in the factory area, high pollutant content, dead vegetation, etc., and achieve the goal of reducing air pollution, inhibiting chemical absorption, and maintaining water quality Effect

Active Publication Date: 2008-05-07
GUIZHOU BRANCH CHINA ALUMINUM IND
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AI Technical Summary

Problems solved by technology

[0002] Due to the direct contact with gas, the gas washing circulating water dissolves acidic and harmful gases such as hydrogen sulfide, resulting in weak acidity in the pH value of the circulating water, and the addition of alkali to neutralize a large amount of harmful gases. The water quality of the circulating water deteriorates, and the pollutant content is high. The chemical corrosion and electrochemical corrosion of the metal components of the facility are serious
The circulating water area volatilizes a large amount of harmful gases such as hydrogen sulfide and ammonia, polluting the air in the factory area, causing tears in the eyes of personnel, nausea and vomiting, and poisoning and death of plants and trees

Method used

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Examples

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Embodiment Construction

[0015] Thermal circulation water treatment of our company's gas plant: flow rate 550 ~ 630m 3 / h; the temperature of the washing water is generally between 60-70°C, the temperature of the hot water pool is generally between 55-63°C, and the temperature of the cold water pool is generally between 38-45°C; the total water capacity of the circulating water system is about 2400m 3 , the total volume of the sedimentation tank is 2100m 3 , The theoretical residence time of the sedimentation tank is 3.3 to 3.8 hours.

[0016] After we applied this invention, we added 0.1% Qiba Refined Chemical 1011 flocculant and 10% compound ferrous sulfate desulfurizer in the ditch before the sedimentation tank at a distance of about 10 and 20 meters, so that the medicament can be deposited in the ditch, sedimentation The pool enters the water tank and the cloth water tank and mixes well.

[0017] The comparison of water treatment effects before and after adopting this technology is shown in the ...

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PUM

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Abstract

The invention provides a method for regulating water quality and reducing air pollution under weakly acidic operating conditions of circulating water. Precipitation, removal of suspended solids and sulfides. The organic polymer flocculant adopts Qiba Refining Chemical 1011, and the input amount is 0.4~0.8mg/l. The dosage of ferrous sulfate deacidification flocculant is 9~14mg/l. The invention has good purifying effect of suspended matter and certain desulfurization effect, and can also form calcium sulfate precipitation on the surface of metal components of circulating water facilities to prevent metal corrosion. It is suitable for water quality control of gas washing and cooling circulating water in metallurgy, coal chemical industry and petrochemical industry, to maintain the quality of circulating water and greatly reduce air pollution caused by volatilization of harmful gases in washing and circulating water.

Description

technical field [0001] The invention relates to a treatment method for industrial waste gas and waste water, in particular to a method for regulating water quality and reducing air pollution under weakly acidic operating conditions of circulating water. Background technique [0002] Due to the direct contact with gas, the gas washing circulating water dissolves acidic and harmful gases such as hydrogen sulfide, resulting in weak acidity in the pH value of the circulating water, and the addition of alkali to neutralize a large amount of harmful gases. The water quality of the circulating water deteriorates, and the pollutant content is high. The chemical corrosion and electrochemical corrosion of the metal components of the facility are serious. The circulating water area volatilizes a large amount of harmful gases such as hydrogen sulfide and ammonia, polluting the air in the factory area, causing tears in the eyes of personnel, nausea and vomiting, and poisoning and death o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56
Inventor 胡黔生韦茂森张铁韬徐永炽王钰
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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