关键词: 湿式静电除雾器, 再生烟气, 烟气脱硫

Abstract: This paper introduces the working principle of the wet electrostatic mist eliminator and its application effect on the Ⅱ catalytic cracking unit in Zhenhai Refining & Chemical Company. The effect of wet electrostatic mist eliminator on eliminating the color plume of recycled flue gas is not good when the wet electrostatic mist eliminator operates alone and the line speed of flue gas is 2 m/s; the sulfuric acid fog concentration in flue gas is approximately 51.8 mg/m3. When used in combination with tri-functional additive, the concentration of sulfuric acid in the flue gas plume is reduced to 24.5 mg/m3 and the colored plume can be eliminated. The paper analyzes the problems and causes in the operation of electrostatic mist eliminator and puts forward the technical improvement scheme. It is proved that the operation cycle of wet electrostatic mist eliminator and flue gas desulphurization unit synthetic tower increases significantly after technical improvement.

Key words: wet electrostatic mist eliminator, regenerated flue gas, flue gas desulphurization