Objective The aim is to study the application of calcium-based dry desulfurizer in the field of flue gas desulfurization,and give full play to the advantages of low cost,good desulfurization performance and environmental friendliness of calcium-based desulfurizer,so as to achieve the up-to-standard emission of SO2 in flue gas.Methods The physical and chemical properties of the prepared calcium-based desulfurizer were characterized by XRD,BET,FTIR and XPS.Additionally,simulating sulfur-containing waste gas,the effects of SO2 content,reaction temperature,O2 content and volume space velocity on the desulfurization performance of calcium-based dry desulfurizer were investigated by a fixed bed reactor.Results The prepared calcium-based desulfurizer demonstrated effective desulfurization,and its optimum operating temperature range was 220-300℃,which was suitable for the case that the volume fraction of SO2 in flue gas did not exceed 0.4%.The increase of O2 content produced new active sites for adsorption,which could promote desulfurization process.When the volume space velocity was in the range of 500-2 000 h-1,the sulfur capacity did not change much.Conclusions The application of calcium-based dry desulfurizer in the field of flue gas desulfurization has high efficiency and stability,which can provide reference for its wide application in the industrial field.
关键词
二氧化硫/钙基脱硫剂/烟气脱硫/达标排放/干法脱硫
Key words
sulfur dioxide/calcium-based desulfurizer/flue gas desulfurization/up-to-standard emission/dry desulfurization
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