氨法脱除燃煤烟气中CO2的实验研究  

Experimental Study of the Removal of CO_2 from Coal-fired Flue Gas by Using Ammonia

作　　者：张茂[1] 赛俊聪[1] 吴少华[1] 李振中 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]国家电站燃烧工程技术研究中心,辽宁沈阳110034

出　　处：《热能动力工程》2008年第2期191-194,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：利用氨水喷淋脱除燃煤烟气中的CO2温室气体是一种新的CO2捕集方法。为研究氨水浓度、CO2浓度及温度等参数对CO2脱除率的影响,以稀氨水为吸收剂,采用CO2连续在线检测,在阶梯环填料塔内进行了不同参数下的喷淋实验研究。结果表明,稀氨水同样具有较高的脱除率,随着氨水浓度的增加,反应达到平衡状态所需的时间和平衡状态时的CO2脱除率也逐渐增大;随着烟气中CO2初始浓度的增大,CO2脱除率将随之减小;在22-50℃的温度区间内,CO2脱除率受反应温度的影响显著,波动比较明显,并在40℃附近达到最大值。The removal of CO2 greenhouse gas from coal-fired flue gas by spraying ammonia water is a new kind of CO2 trapping method.To study the influence of such parameters as ammonia water concentration,CO2 concentration and temperature on the CO2 removal rate,an experimental study of ammonia water spray has been performed by employing a continuous on-line CO2 detection in a stepped-ring packed tower operating at different parameters with diluted ammonia water serving as an absorption agent.The study results show that the diluted ammonia water also enjoys a relatively high rate of CO2 removal.With an increase of the ammonia water concentration,the time required by the reaction to attain an equilibrium state and the CO2 removal rate achieved at an equilibrium state will also gradually increase.With an increase of the initial CO2 concentration in the flue gas,the CO2 removal rate will decrease accordingly.In a temperature range from 22 to 50 ℃,the CO2 removal rate is affected remarkably by the reaction temperature accompanied by a relatively conspicuous fluctuation of the rate in question.The removal rate will attain its maximum value at a temperature around 40 ℃.

关 键 词：CO2温室气体 氨水喷淋 填料塔 碳酸氢铵 

分 类 号：X773[环境科学与工程—环境工程]