CAJ | 학술논문

在某燃煤电厂用乙醇胺(MEA)作吸收剂进行了 CO2燃烧后捕集中试,并对系统的排放物进行了分析.吸收塔尾气和再生气用GASMET烟气监测系统进行在线监测,可得到二者组分及含量.结合电厂烟气、连续监测系统(CEMS)数据及实验室溶液分析,根据烟气数据对MEA的挥发及降解情况作了研究,比较了系统前后烟气组分的变化,讨论其尾气对环境是否造成二次污染.试验结果表明:MEA在吸收塔中主要发生氧化降解,在再生塔中主要发生热降解,且溶剂损耗主要来自氧化降解和挥发;降解的主要产物为 NH3和乙醛,二者在气体中含量变化情况与溶液中MEA浓度变化基本一致;预洗塔能除去原烟气中部分酸性气体.故CO2捕集系统可以进一步减少电厂净烟气中的原有污染物,但也会产生新的污染组分.新生成的污染物含量很少,符合国家标准,不会造成二次污染.
재모연매전엄용을순알(MEA)작흡수제진행료 CO2연소후포집중시,병대계통적배방물진행료분석.흡수탑미기화재생기용GASMET연기감측계통진행재선감측,가득도이자조분급함량.결합전엄연기、련속감측계통(CEMS)수거급실험실용액분석,근거연기수거대MEA적휘발급강해정황작료연구,비교료계통전후연기조분적변화,토론기미기대배경시부조성이차오염.시험결과표명:MEA재흡수탑중주요발생양화강해,재재생탑중주요발생열강해,차용제손모주요래자양화강해화휘발;강해적주요산물위 NH3화을철,이자재기체중함량변화정황여용액중MEA농도변화기본일치;예세탑능제거원연기중부분산성기체.고CO2포집계통가이진일보감소전엄정연기중적원유오염물,단야회산생신적오염조분.신생성적오염물함량흔소,부합국가표준,불회조성이차오염.
A pilot scale post-combustion CO2 capture test using mono ethanol amine(MEA)was conducted in a coal-fired power plant,and the exhaust gas was analyzed using GASMET analyzer. This research investigated MEA volatilization and degradation using GASMET data,CEMS (continuous emission monitoring system) data and laboratory analysis,compared the components of the flue gas before and after system,and discussed the effects of secondary pollution on environment. The results indicated that degradation of MEA mainly occurred in absorber and thermal degradation occurred in stripper,solvent loss was mainly caused by oxidative degradation and volatilization. The main degradation products were ammonia and acetaldehyde,the concentrations of which changed in accordance with MEA consumption rate in solution. And the pre-wash column could decrease acid gases. Therefore,the CO2 capture system could effectively reduce the original pollution from flue gas, even though new pollutions could be generated,considering the small amount (mush less than national standards),this system would not cause secondary pollution.