基于主元分析的烟气协同脱除技术研究

Study on Flue Gas Synergistic Removal based on Principal Component Analysis

为达到超低排放的要求,对某300、600、660 MW机组进行了不同形式的烟气处理系统升级改造。改造后的运行试验表明:这3台机组的脱硫协同除尘效率在69.73%～81.21%之间。为进一步分析协同除尘效率的主要影响因素,以600 MW机组为例,采用主元分析法,得到影响脱硫协同除尘效率的主要因素是脱硫入口烟尘浓度、机组负荷和脱硫装置入口SO_2浓度。进一步分析,脱硫入口SO_2浓度在1 805 mg/m^3,其协同除尘效率最高。

For the 300 MW,600 MW and 660 MW units,in order to meet the requirements of ultra-low emission,the three units have been upgraded and reformed with different types of flue gas treatment system.The operation test after the transformation shows that the desulfurization synergistic dust removal efficiency of the three units is between 69.73% and 81.21%.In order to further analyze the main influencing factors of synergistic dust removal efficiency,the 600 MW unit was studied more in details.With the method of principal component analysis,the main influencing factors of synergistic dust removal efficiency of desulfurization were determined to be the concentration of flue dust at the inlet of desulfurization device,unit load and SO2 concentration at the inlet of desulfurization device.Further analysis indicated that the synergistic dust removal efficiency varied with SO2 concentration at the inlet of desulfurization unit.For the power plant under study,with the 1 805 mg/m3 of SO2 concentration at the entrance of desulfurization unit,the synergistic dust removal efficiency is the highest.