摘要
一般烟气或热解产生的燃气中CO2的体积分数远高于HC l气体,因此在石灰吸收剂高温干式净化HC l气体过程中必须考虑CO2的影响。由于烟气中CO2的作用,很大一部分石灰吸收剂将转变为CaCO3。CO2与HC l气体之间存在着对石灰吸收剂的争夺,从而削弱了HC l气体的净化效果,降低了石灰的有效利用率。采用钠碱溶液处理制成的改性石灰在中高温段的碳酸钙化率较低,能在一定程度上降低CO2对净化反应的不利影响。
The volume fraction of COz in conventional flue gas or gas generated by pyrolysis is much more than that of HCl gas, so the influence of CO2 is to be taken into account in the course of high-temperature dry removal of HCl gas by lime （absorbent）. A large part of lime will be transformed into CaCO3 due to the effect of CO2 in flue gas. There is a competition for lime between CO2 and HCl gas, thus abating the removal effect of HCl gas, and reducing the effective utilization rate of lime. Compared with lime, the modified lime treated by sodium solution changes into CaCO3 to a much less extent at moderate and high temperatures, and the negative impact of CO2 on HCl removal is decreased to some extent.
出处
《煤气与热力》
2006年第3期19-22,共4页
Gas & Heat
基金
教育部留学归国人员科研启动基金项目(1000241007)
科技部中国-丹麦科技合作项目(AM14:10/NPP6)
关键词
高温燃气净化
高温烟气净化
HCL气体
CO2
石灰
改性石灰
high-temperature purification of gas
high-temperature purification of flue gas
HCl gas
CO2
lime
modified lime
