High-humidity flue gas purifying device

Abstract

The invention relates to a high-humidity flue gas purifying device, which is used for purifying flue gas with water steam and fine particulate matters. The high-humidity flue gas purifying device comprises a heat exchange tube and a turbulence structure, wherein the flue gas can flow through a surface of the heat exchange tube and the turbulence structure, a refrigerant flows in the heat exchange tube, the water steam in the flue gas can be condensed on the surface of the heat exchange tube and surfaces of the fine particulate matters so as to form a water film and liquid drops, the turbulence structure has a bending part, and the flue gas can flow through the bending part and forms a turbulent flow, so that the liquid drops and the fine particulate matters are collided and agglomerated so as to be acquired and removed.

Description

technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a high-humidity flue gas purification device. Background technique [0002] my country's fossil energy structure of poor oil, little gas and rich coal determines the energy consumption structure dominated by coal, and the consumption of a large amount of coal brings nitrogen oxides (NO x ), sulfur oxides (SO x ) and fine particulate matter (PM 2.5 ) and other air pollutants. Under the current situation of arduous environmental governance tasks, my country's requirements for energy conservation and emission reduction are becoming increasingly stringent. In September 2014, the three ministries and commissions jointly issued the "Coal Power Energy Conservation and Emission Reduction Upgrading and Transformation Action Plan (2014-2020)", requiring that the emission of flue gas pollutants from newly built coal-fired power generation units in the eastern region should ...

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Problems solved by technology

On the other hand, the direct discharge of high-humidity flue gas after the wet desulfurization process has caused a serious waste of water resources. According to accounting, the water consumption of wet desulfurization accounts for about 18% of the total water consumption of the power plant. The water vapor taken away accounts for about 90% of the water consumption of FGD. Specifically, for a 600,000-kilowatt coal-fired power unit, the wet desulfurization process takes away about 80-100 tons of desulfurization evaporation water per hour

In addition, both types of ultra-low emission routes have the problem of fine particles (with a particle size of 0.1-1.0 μm) penetrating through the window and directly discharged into the air, causing pollution to the environment

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