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Method and system for treating high-chlorine desulfurization waste water by electrolytic method and performing flue gas mercury pollution control

A desulfurization wastewater, electrolysis technology, applied in water pollutants, gas treatment, precipitation treatment, etc., can solve the problems of high vapor pressure, difficult to directly capture, insoluble in water, etc., to reduce emissions, reduce equipment costs, The effect of reducing production costs

Inactive Publication Date: 2017-05-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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Problems solved by technology

Hg 2+ It is easily soluble in water, and can absorb 80% to 90% of Hg in the flue gas with the existing wet desulfurization device 2+ ; Hg p Adsorbed on the fly ash in the flue gas, it can be removed by dust removal equipment; Hg 0 It has a high vapor pressure and is insoluble in water, so it is difficult for dust removal equipment and wet desulfurization equipment to capture it directly

Method used

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  • Method and system for treating high-chlorine desulfurization waste water by electrolytic method and performing flue gas mercury pollution control

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Embodiment Construction

[0043] The present invention provides a method and system for electrolytic treatment of high-chloride desulfurization wastewater and its use in flue gas mercury pollution control. The present invention will be further described below in conjunction with the accompanying drawings and examples, and the contents of the examples are not intended to limit the scope of protection of the present invention.

[0044] Such as figure 1 As shown, an electrolysis method is used to treat high-chloride desulfurization wastewater and is used for flue gas mercury pollution control. The system includes: coal-fired power plant boiler 1, SCR system 2, dust removal equipment 3, induced draft fan 4, wet scrubber 5, chimney 6, neutralization Box 7, mixing box 8, flocculation box 9, inclined plate clarifier 10, electrolysis device 13, bubbling reactor 12, air compressor 11, compressed air source 14, chlorine liquefier 15.

[0045] The flue gas produced by the coal-fired power plant boiler 1 enters the ...

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Abstract

The invention discloses a method and a system for treating high-chlorine desulfurization waste water by an electrolytic method and performing flue gas mercury pollution control, and belongs to the technical field of waste water treatment. The method comprises the following steps: (1) pretreating the high-chlorine desulfurization waste water; (2) pumping the pretreated desulfurization waste water into an electrolysis device to perform electrolysis; (3) purifying chlorine generated by electrolysis and then introducing the purified chlorine into a chlorine liquefier to perform liquefied storage for future use; (4) carrying the stored chlorine by compressed air to be introduced into an SCR inlet flue of a coal-fired power plant boiler; and (5) refluxing the obtained desalted water into a wet scrubber. By the method, high-chlorine desulfurization waste water treatment and flue gas mercury pollution control are integrated, so the aim of treating the desulfurization waste water is fulfilled and the mercury in coal-fired flue gas is controlled.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a method and system for treating high-chloride desulfurization waste water by electrolysis and being used for flue gas mercury pollution control. Background technique [0002] The wet flue gas desulfurization system (WFGD) of coal-fired power plants discharges a large amount of wastewater, which is weakly acidic, contains a large amount of suspended solids, gypsum particles, silica and hydroxide, etc., and is enriched in a large amount of heavy metal ions, chlorine and fluorine , sulfate ions, etc., it is difficult to treat and reuse wastewater. In order to maintain the safe and stable operation of the desulfurization system, ensure the quality of gypsum products and ensure the desulfurization efficiency, it is necessary to control the C1 in the slurry - The concentration is generally required to be lower than 20g / L, so a large amount of wastewater need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F9/06B01D53/14B01D53/26B01D53/28B01D53/64B01D53/86C02F101/12C02F103/18
CPCB01D53/1456B01D53/263B01D53/28B01D53/64B01D53/86B01D2251/108B01D2258/0283C02F1/4672C02F1/52C02F1/5245C02F1/56C02F1/66C02F2001/007C02F2101/12C02F2103/18
Inventor 刘松涛梅玉倩陈传敏张智博黄陈曹强周达海
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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