Treatment method of sintering flue gas desulphurization wastewater

A technology for desulfurization wastewater and sintering flue gas is applied in the field of iron and steel smelting and processing, and can solve the problems of secondary pollution, high cost of wastewater treatment, and no report on the treatment process of sintering flue gas desulfurization wastewater.
CN101993169AActive Publication Date: 2011-03-30BAOSHAN IRON & STEEL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BAOSHAN IRON & STEEL CO LTD
Publication Date
2011-03-30

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Abstract

The invention discloses a treatment method of sintering flue gas desulphurization wastewater, which completes the treatment on the sintering flue gas desulphurization wastewater through the following five steps of: 1. neutralization and coagulation: regulating the pH value of the sintering flue gas desulphurization wastewater to 8.5 to 9.5 by lye, and adding 0 to 200ppm of coagulating agents; 2. flocculation: adding 0 to 10ppm of coagulant aids for forming flocs; 3. precipitation and filter liquor separation; 4. biochemical treatment on filter liquor; and 5. deep treatment. The treatment method can be used for reducing the treatment cost of the desulphurization wastewater without generating influence on other treatment systems, thereby having good application and popularization prospects.
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Description

technical field

[0001] The invention belongs to the field of iron and steel smelting and processing, and in particular relates to a treatment method for sintering flue gas desulfurization wastewater. Background technique

[0002] The sintering process in my country's iron and steel smelting process is the main source of air pollution, and the proportion of exhaust gas discharged in the entire iron and steel plant is: smoke and dust 17%, SO 2 46%, NO X 20%. The treatment of sintering flue gas has become SO 2 The focus of emission reduction. In recent years, the national environmental protection requirements for sintering machine flue gas emissions have become increasingly stringent: the issued national standards require existing iron and steel enterprises sintering machine SO 2 Emission standard is 600mg / Nm 3 , the 2010 emission standard for sintering machines in new iron and steel enterprises is 100mg / Nm 3 .

[0003] According to the requirements of the national envir...

Claims

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