Causes analysis of wet flue gas desulphurization stack rainout for the thermal powerplant without GGH and its countermeasures

摘要

This paper introduces the phenomenon of stack "rainout" in the wet flue gas desulphurization system for the thermal power plant units without GGH, analyzes the factors affecting "rainout" of wet stack and finds out the main causes resulting in stack "rainout" of wet flue gas desulphurization for Wangtan Power Plant without GGH, Such as low temperature after the flue gas desulfurization, insufficient diffusion capability of flue gas flow, the blockage of mist eliminator, poor operation of electrostatic precipitator, inadequate combustion of boiler, high speed of flue gas flow in the stack, the effect of climate. Also it is analyzed that the mist eliminator equipment and ensuring the efficient operation of electrostatic precipitator may relieve the phenomenon of stack "rainout".