Phase change-based flue gas end dehydration fine dust removal device

Abstract

The invention discloses a phase change-based flue gas tail end dehydration fine dust removal device and relates to the field of air pollution control. The phase change-based flue gas tail end dehydration fine dust removal device comprises a horizontally arranged dedusting box body and a sedimentation tank, wherein a phase change cooling area, a spray cooling area and a filter screen dedusting areaare sequentially arranged in the dedusting box body from the flue gas inlet flue direction to the flue gas outlet flue direction. The phase change cooling area comprises a plurality of layers of heatpipe heat exchange layers, each layer of heat pipe heat exchange layer comprises a plurality of heat pipes which are arranged in parallel with each other, the evaporation sections of the heat pipes are positioned inside the dedusting box body, and the condensation sections of the heat pipes are positioned outside the dedusting box body. The spray cooling area comprises a plurality of atomizing nozzles. The filter screen dedusting area comprises a plurality of vertically arranged filter screen dust removal units, wherein each filter screen dust removal unit comprise a support frame, and the support frame is paved with a filter screen. The sedimentation tank is positioned below the opening on the bottom surface of the dedusting box body. The phase change-based flue gas tail end dehydrationfine dust removal device aims at further dedusting industrial flue gas under the conditions of low cost and low energy consumption to achieve near zero emission and eliminate white smoke.

Description

technical field [0001] The invention relates to the field of air pollution control, more specifically, to a phase change-based flue gas terminal dehydration fine dust removal device, which is suitable for industrial furnaces, especially for the treatment of industrial flue gas pollutants such as primary flue gas at the end of converter steelmaking . Background technique [0002] In recent years, with the gradual increase of my country's economic strength and stricter environmental protection standards, the emission standards of major pollutants have been subject to near-zero emission requirements. According to the national standard "Steelmaking Industry Emission Standard of Air Pollutants GB28664-2012", the emission concentration of primary flue gas particles from the intermediate converters of existing steelmaking enterprises is required to be 100mg / m 3 Below, newly established enterprises and enterprises with special emission limits require that the concentration of parti...

AI Technical Summary

Problems solved by technology

However, the above dust and mist removal devices also have relatively large deficiencies. Among them, the heat exchange medium of the tube-grid heat exchanger uses circulating water, which consumes water resources, and has low heat exchange efficiency, large volume, and heavy weight of the absorption tower; Heaters and demisters are arranged in sequence and flushing nozzles are distributed. The equipment layout is relatively complicated, maintenance is difficult, and it is difficult to achieve fine dust removal

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