Device and technology for desulfurizing and removing white smoke

Abstract

The invention discloses a device and a technology for desulfurizing and removing white smoke. The device comprises a reaction tower (2), wherein a the reaction tower (2) is provided with a chimney (5); the reaction tower (2) is internally provided with spray layers (3) and a demister (4) from bottom to top; the chimney (5) is internally provided with an orifice plate I (6) and an orifice plate II(11) from bottom to top; high polymer water absorption particles (7) are placed on the orifice plate I (6); a chimney heat exchanger (8) is arranged at the top part of the chimney (5). The device fordesulfurizing and removing the white smoke, disclosed by the invention, is simple and compact in structure, is strong in applicability, and is applied to desulfurization of a coal-fired boiler; the smoke temperature can be reduced through an inlet heat exchanger, the lower temperature is more beneficial for absorbing SO2 as absorption of the SO2 is a heat release reaction, and the desulfurizationefficiency can be increased by reducing the smoke temperature; a two-stage dewatering measure of the demister and the high polymer water absorption particles is adopted, and the water content in smokecan be reduced; finally, by rising the smoke exhaust temperature through the chimney heat exchanger, the white smoke can be removed, and visual pollution can be reduced.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a desulfurization and white smoke removal device and process. Background technique [0002] During the operation of coal-fired boilers, a large amount of flue gas containing SO2 will be generated. The commonly used desulfurization process is wet desulfurization. The main principle is that the coal-fired flue gas (about 130°C) enters the desulfurization tower after denitrification and dust removal. In the absorption tower, the absorption slurry contacts and mixes with the flue gas, and a series of chemical reactions occur between the sulfur dioxide in the flue gas and the alkaline substances in the slurry. After being removed, the flue gas is humidified and cooled to below 50°C to be discharged, and the humidity is very high and in a saturated state. However, when the relative humidity is high and the temperature is low, the water vapor content in the atmosphere is close t...

AI Technical Summary

Problems solved by technology

Condensate the outlet flue gas first and then heat it to avoid intersecting with the saturated humidity curve. However, since this method is aimed at the desulfurization outlet flue gas, it does not promote the improvement of desulfurization efficiency.

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