The Technical Practice for Alleviating the Blockage of GGH in Wet Flue Gas Desulfurization System
Shanghai Waigaoqiao Power Plant Co.,Ltd has started to implement the wet flue gas desulfurization system technique on its four 300MW Subcritical Turbine-Generator Sets since 2006.However,the GGH equipped in the desulfurization system get blocked more and more seriously as time goes by.The desulfurization system has to stop running frequently so that the GGH can be washed.The stop-running of the desulfurization system decreases its efficiency and increases the cost for maintaining.By analyzing the effect of the heat transfer component of GGH,the quality of the bituminous coal,Dust removal equipment,the control of the level in absorption tower slurry pool and studying the process of desulfurization system,We have transformed heat transfer component from the original compact corrugated plate to the L-shaped one and replaced electrostatic precipitator by bag filter.We make some improvements according to the major reason for the blockage of GGH,which greatly alleviates the condition of GGH,increases the efficiency of desulfurization system and the safety of the Generator Sets.
wet flue gas desulfurizationGas-Gas Heater(GGH)blockageheat transfer componenttechnical reform
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