摘要
在常压、60-90℃下通过试验系统对氨水吸收CO2后的富液的再生特性以及再生液的吸收能力进行了研究,得到了影响氨水富液再生的因素及再生液的吸收性能.结果表明：提高再生温度可以增大CO2的再生速率和再生程度;氨水富液负荷对再生有很大影响,负荷低于0.4 molCO2/mol NH3时,再生率维持在较低水平,随后再生率随负荷上升而线性增加;负荷为0.6 molCO2/mol NH3时,氨水富液已基本丧失脱碳能力,再生后其吸收性能得到一定恢复;在再生液中添加少量的新鲜氨水,有助于恢复再生液对CO2的吸收能力;综合考虑富液再生与再生液吸收两方面,推荐氨水循环脱碳时负荷变化范围为富液0.6 mol CO2/mol NH3,贫液0.4 mol CO2/mol NH3.
Using the experimental system,studies were carried out for the regenerative characteristics of the CO2-rich solution after CO2 capture by aqueous ammonia and the absorption capability of the regenerative solution at normal pressure and 60-90 ℃.Factors influencing the regeneration of CO2-rich solution and absorption performance of the regenerative solution were obtained.Results show that rise of regenerating temperature can increase the regenerating rate and regenerating degree of CO2.The load of CO2-rich ammonia solution has great influence on regeneration.When the load is lower than 0.4 mol CO2/mol NH3,regenerating rate will keep at low level and regenerating rate will increase linearly with the load.When the load is 0.6 mol CO2/mol NH3,the CO2rich ammonia solution lose the capability of decarbonization.After regeneration,the absorption performance be recovered to some extent.Adding a little fresh aqueous ammonia into the regenerative solution will be helpful to the recovery of the absorption capacity of the regenerative solution for CO2.By integral consideration of the regeneration of CO2-rich solution and absorption capacity of the regenerative solution,it is recommended that the load scope for decarbonization by ammonia cycle be 0.6 mol CO2/mol NH3 for CO2-rich solution and 0.4 mol CO2/mol NH3 for CO2-lean solution.
出处
《动力工程学报》
CAS
CSCD
北大核心
2011年第2期159-164,共6页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金资助项目(50676083)
关键词
氨水
循环脱碳
再生
再生液
吸收特性
aqueous ammonia
decarbonization
regeneration
regenerative solution
absorption characteristic
