烟道气中二氧化碳回收技术的研究

Recovery of carbon dioxide from flue gas

介绍了一乙醇胺(MEA)法回收烟道气中二氧化碳的基本原理和工艺流程,指出MEA法具有蒸汽消耗量高、溶液腐蚀性强、MEA易与氧气发生降解反应等缺点。开发了一种从烟道气中回收二氧化碳的新技术,采用的吸收剂是在MEA水溶液中添加了活性胺、抗氧剂和防腐剂的复合溶液。将新技术应用于赤天化集团有限公司烟道气中二氧化碳的回收装置上,试验结果表明,二氧化碳年平均产量提高了25.8%,1m3二氧化碳的蒸汽消耗量可减少3.23kg,并可解决MEA对设备的腐蚀问题。

The basic principle and process of monoethanolamine (MEA) method for recovering CO2 from flue gas were introduced, and the shortcomings of it such as high vapor consumption and heavy solution's corrosion, reaction activeness between MEA and O2 were pointed out. An alternative process was developed, which used an aqueous absorbent consisting of MEA, activated amine, antioxidant and corrosion inhibitor. This new process adopted in recovery devices of CO2 from flue gas was applied in Guizhou Chitianhua Co., Ltd. The results show that the new process can increase the average production capacity of CO2 by 25.8%, and reduce vapor consumption by 3.23 kg/m3, with no corrosion.