Single-tower three-region desulfuration and white smoke-removal integrated device and method

Abstract

The invention discloses a single-tower three-region desulfuration and white smoke-removal integrated device and method, belonging to the flue gas purification device. The device comprises an absorption tower inlet flue, a desulfuration and white smoke-removal integrated tower, an absorption tower outlet flue and a tower-bottom size tank, wherein a size spraying layer, an in-tower partitioning device, a cooling water spraying layer and a dust-removal and demisting device are sequentially arranged above an inlet of an absorption tower, the size spraying layer and the cooling water spraying layerare respectively provided with size spraying layer nozzles and cooling water spraying layer nozzles, and condensate of the cooling water spraying layer is collected through the in-tower partitioningdevice and is returned to a condensate water tank. According to the single-tower three-region desulfuration and white smoke-removal integrated device, the dust-removal, desulfuration and white smoke-removal functions are simultaneously realized in a same absorption tower device; and the device has the advantages of compact layout, small occupied area, low investment and operation costs and the like.

Description

technical field [0001] The invention belongs to the field of flue gas purification, and in particular relates to a single-tower three-zone desulfurization and dewhitening integrated device and method. Background technique [0002] With the implementation of ultra-low emissions from coal-fired power plants, particulate matter, SO 2 , NOx and other pollutants have been effectively controlled to varying degrees. However, due to the low temperature of the flue gas after wet desulfurization, the saturated wet flue gas contacts with the ambient air and gradually cools down. The smoke plume causes visual pollution and causes great troubles to the surrounding residents; at the same time, the high-humidity environment promotes the secondary transformation of primary pollutants and forms an inverse humidity layer to hinder the further diffusion of pollutants, which is one of the sources of local smog formation . For this reason, Shanghai, Zhejiang, Tianjin, Hebei Handan and other pl...

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Problems solved by technology

However, since the cooling source usually adopts the natural cooling source of rivers, lakes and seas or the cold water of circulating cooling towers, the temperature difference between the cooling source and the flue gas is small, and a large amount of spray water is usually required for circulating spraying. Therefore, in order to avoid the failure of the desulfurization system caused by the mixing of spray water and condensed precipitate water and slurry dilution, it is usually adopted to connect a new spray cooling tower in series after the existing absorption tower. too big to implement

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