Flue gas cleaner with integration of desulfurization, denitrification, mercury removal and dust removal

Abstract

The invention relates to a flue gas cleaner with integration of desulfurization, denitrification, mercury removal and dust removal. The flue gas cleaner comprises an integrated cleaning tower arranged on a base, a spiral flue duct, a dry absorbing and cleaning agent applying device and a wet absorbing and cleaning agent applying device, wherein an automatic slag remover, a flocculation and precipitation cleaning working zone, an inner precipitation circulating zone and an outer precipitation circulating zone are arranged in the base; an inner wall cleaning fluid collecting water channel is formed between the inner precipitation circulating zone and the outer precipitation circulating zone; the outer precipitation circulating zone is divided to form winding paths by a transverse partition board; the integrated cleaning tower is divided into a demisting and dewatering cleaning working zone, an absorption cleaning working zone and an oxidation cleaning working zone by a gas-water separator; an annular sprayer, a backwash cylindrical sprayer and a demisting filter screen are arranged in the demisting and dewatering cleaning working zone respectively; a main cylindrical sprayer is arranged in the absorption cleaning working zone; a cylindrical oxidation cleaning agent sprayer is arranged in the oxidation cleaning working zone; a flue gas outlet and a spray circulating system are arranged at the top of the integrated cleaning tower respectively. The flue gas cleaner has significant cleaning effect.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to an integrated flue gas purifier for desulfurization, denitrification, mercury dedusting and dust removal. Background technique [0002] At present, the pollution caused by the discharge of industrial waste gas and coal-fired flue gas has reached the point of destroying the ecological environment and affecting human health, so various smoke and dust removal and flue gas purification technologies have also been developed, but the previous dry dust removal Or wet flue gas purification products are generally troubled by inability to desulfurize and denitrify, excessive resistance, high operating costs, severe wet corrosion, and equipment blockage to varying degrees, which makes the effect of dust removal and flue gas purification plummet, resulting in industrial Problems such as sick work of equipment and increased consumption. [0003] Various existing wet dedusting purifier...

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Problems solved by technology

[0002] At present, the pollution caused by the discharge of industrial waste gas and coal-fired flue gas has reached the point of destroying the ecological environment and affecting human health, so various smoke and dust removal and flue gas purification technologies have also been developed, but the previous dry dust removal Or wet flue gas purification products are generally troubled by inability to desulfurize and denitrify, excessive resistance, high operating costs, severe wet corrosion, and equipment blockage to varying degrees, which makes the effect of dust removal and flue gas purification plummet, resulting in industrial Problems such as sick work and increased consumption of equipment

[0003] Various existing wet dedusting purifiers and dedusting purification methods, such as spray wet dedusting purifiers, impact wet dedusting purifiers, water film wet dedusting purifiers, self-excited wet dedusting purifiers etc., to varying degrees, there are insurmountable fan water and serious blockage, as well as excessive resistance and high operating costs. In addition, desulfurization and denitrification, mercury removal and dust removal cannot be carried out in one device at the same time, so that the investment at one time is too large and the operating cost is too high. Increase

[0004] In 2014, the country formulated a new "Boiler Air Pollutant Emission Standard" (GB13271-2014), but the existing technology is difficult to meet the requirements of this emission standard

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