烟气主要成分对基于高活性吸收剂的烟气脱硫脱硝过程影响  

Influence of the Main Constituents of Flue Gas on the Desulfurization and Denitrification Process Based on Highly Active Absorbents

作　　者：许佩瑶[1] 赵毅[1] 康玺[2] 汪黎东[1] 

机构地区：[1]华北电力大学环境科学与工程学院,河北保定071003 [2]华北电力科学研究院,北京100045

出　　处：《热能动力工程》2009年第4期494-498,共5页Journal of Engineering for Thermal Energy and Power

基　　金：河北省科学技术研究与发展计划基金资助项目(07786720D)

摘　　要：采用自行制备的"富氧型"高活性吸收剂,在最佳工艺条件下,通过固定床实验研究了烟气中CO2、O2对高活性吸收剂脱硫脱硝效率的影响和SO2、NOx共存时对彼此脱除效率的影响。研究结果表明:O2的存在对脱硫脱硝有一定的促进作用;CO2的存在对脱硫有抑制作用,但对脱硝有促进作用;SO2在浓度小于2500mg/m3时对NO的脱除起促进作用,大于2500mg/m3时则阻碍NO的脱除;NO的存在对脱硫起促进作用,使脱硫产物中硫酸钙比例增加。该研究结果对基于高活性吸收剂脱硫脱硝工艺深入研究和应用提供了理论依据。By using a self-prepared 'oxygen-enriched type' highly active absorbent,the influence of CO2 and O2 in flue gas on the desulfurization and denitrification efficiency of the highly active absorbent and the influence of the coexistence of SO2 and NOx on the desulfurization efficiency were experimentally studied at an optimum technological condition and through the use of a fixed bed.The research results show that O2 can play a definite role of enhancing both the desulfurization and denitrification,while CO2 can function to prohibit the desulfurization but promote the denitrification.When SO2 concentration is less than 2 500 mg/m3,it contributes to the removal of NO.When SO2 concentration is greater than 2 500 mg/m3,it prohibits the removal of NO.The presence of NO can promote the desulfurization and increase the proportion of calcium sulphate in desulfurization products.The foregoing can provide a theoretical basis for the further study and application of the simultaneous desulfurization and denitrification process based on highly active absorbents.

关 键 词：高活性吸收剂 烟气成分 固定床 脱硫效率 脱硝效率 

分 类 号：X701.3[环境科学与工程—环境工程]