Experimental study on improving the SO2 ultra low emission economy of 300 MWCFB boiler
Jin Senwang
Liu Bin
Hui Yan
Gao Hongpei
Shi Zhenghai
Sun Xianbin
Xiao Ping
Yuan Ye
Tang Wei
Abstract：In order to improve the economy of SO2 ultra low emission of boiler unit,a real boiler test has been carried out in a 300 MWCFB boiler.The two stage combined desulfurization technology combined with dry desulfurization and CFB-FGD desulfurization in CFB boiler has been studied.The results show that the best desulfurizer varieties in dry process desulfurization and CFB-FGD can be optimized by theoretical analysis and laboratory test.The change of load in the operation parameters of CFB boiler affects two stage desulfurization efficiency at the same time.With the increase of the boiler load,the boiler bed temperatrue and inlet temperature desulfurization tower all show an upward trend.The increase of bed temperature reduces the desulfurization efficiency in the furnace,and the increase of the inlet temperature of desulfurization tower improves desulfurization efficiency of CFB-FGD.In accordance with the recommended limestone and lime physical and chemical parameters and two stage desulfurization system matching operation,the SO2 concentration in boiler flue gas meets the requirements of ultra-low emission limits.The dry desulfurization and CFB-FGD desulfurizer consumption in the furnace both decrease,and the economic efficiency of SO2 ultra low emission is improved,and the desulfurization cost is reduced.
Keywords：CFB boilerSO2ultra low emissiondry desulfurizationCFB-FGD
Publication Date：2017-01-01