System and method for eliminating colored smoke plume in wet desulphurization flue gas

Abstract

The invention discloses a system and method for eliminating colored smoke plume in wet desulphurization flue gas, belonging to the technical field of atmospheric governance. The system comprises a super-gravity dehumidification absorber, wherein the super-gravity dehumidification absorber is provided with a desulphurization wet flue gas inlet, an absorbent inlet and a purified flue gas outlet, andthe super-gravity dehumidification absorber is used for mixing desulphurization wet flue gas entering from the desulphurization wet flue gas inlet and an absorbent entering from the absorbent inlet in the super-gravity dehumidification absorber to remove water vapor and SO3. The system is simple in structure and suitable for industrial treatment of the atmosphere. The method comprises the step ofmixing the desulphurization wet flue gas and the absorbent in the super-gravity dehumidification absorber to remove water vapor and SO3 by adopting the system. According to the method, 60-70% of water vapor and all SO3 in the dehumidified flue gas can be effectively removed; and compared with a traditional method, the method has the advantages that blue smoke generated by SO3 can be thoroughly removed while white smoke is removed, energy consumption is greatly reduced, and good economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of atmospheric control, in particular to a system and method for eliminating colored plumes in wet desulfurization flue gas. Background technique [0002] When the saturated wet flue gas (45-55°C) discharged from the outlet of the wet desulfurization chimney is in contact with the ambient air at a lower temperature, during the diffusion process of the flue gas, the wet flue gas will condense and condense due to the decrease in temperature, and a large amount of Condensed water droplets refract and scatter light to form white smoke; in addition, SO in the flue gas 3 After emptying, sulfuric acid aerosol is generated. When the concentration of sulfuric acid aerosol exceeds 10-20ppm, blue smoke will appear under light conditions. The two are collectively referred to as colored plume, which belongs to secondary pollution. The local government has issued relevant policies to clearly control it. . [0003] At pr...

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Problems solved by technology

[0003] At present, the technologies for eliminating white smoke include direct cooling, direct heating, cooling and reheating, ceramic membrane dehumidification, and solution dehumidification. Although the first three methods can eliminate white smoke, the consumption of cold or heat sources is huge, and the operating cost is high. And in view of uncontrollable weather factors (temperature, humidity, wind speed), the technical environment adaptability of white smoke elimination by heating or cooling is poor

In the ceramic membrane dehumidification method, the ceramic membrane is affected by the permeability, the operation flexibility is small, and multi-stage dehumidification is required. In addition, it is sensitive to the dust in the flue gas and needs to be regenerated regularly. The continuity is poor. The solution dehumidification uses the water vapor partial pressure of the aqueous solution and the smoke. There is a pressure difference in the steam partial pressure of the gas, so that the water vapor in the flue gas is transferred to the solution, thereby eliminating white smoke, but the efficiency of the solution dehumidification device is not high, so the solution dehumidification technology has not been promoted

[0004] Moreover, there is no mature technology for eliminating blue smoke, and the effect of eliminating blue smoke is not good.

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