飞灰对单乙醇胺和二乙醇胺溶液吸收CO2效率的影响

doi:10.16085/j.issn.1000-6613.2016-2316

化工进展 ›› 2017, Vol. 36 ›› Issue (11): 4272-4278.DOI: 10.16085/j.issn.1000-6613.2016-2316

飞灰对单乙醇胺和二乙醇胺溶液吸收CO₂效率的影响

谢文霞¹, 徐成威¹, 张军¹, 赵亚仙², 涂春民³, 吕剑虹¹, 钟辉¹

1. 东南大学能源热转换及其过程测控教育部重点实验室, 江苏南京 210096;
2. 晋中学院机械学院, 山西晋中 030600;
3. 陕西清水川能源股份有限公司, 陕西榆林 719404

收稿日期:2016-12-12 修回日期:2017-01-13 出版日期:2017-11-05 发布日期:2017-11-05
通讯作者: 张军,博士,教授,博士生导师。
作者简介:谢文霞(1987-),女,博士研究生。
基金资助:
国家重点基础研究发展计划（2013CB228504）及国家自然科学基金（51576043）项目。

Effect of fly ash on CO₂ removal efficiency using MEA and DEA solution

XIE Wenxia¹, XU Chengwei¹, ZHANG Jun¹, ZHAO Yaxian², TU Chunmin³, LÜ Jianhong¹, ZHONG Hui¹

1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education(Southeast University), Nanjing 210096, Jiangsu, China;
2. School of Mechanical(Jinzhong College), Jinzhong 030600, Shanxi, China;
3. Shaanxi Qingshuichuan Energy Company Limited, Yulin 719404, Shaanxi, China

Received:2016-12-12 Revised:2017-01-13 Online:2017-11-05 Published:2017-11-05

摘要/Abstract

摘要： 为了掌握燃煤烟气中飞灰对单乙醇胺（MEA）和二乙醇胺（DEA）溶液吸收CO₂效率的影响，在自行设计的乱堆不锈钢θ环填料塔内，采用液相加入飞灰的方式，进行了实验研究并考察了飞灰在溶液温度、液气比、填料高度和飞灰浓度等操作条件下的影响规律。结果表明：飞灰的存在使MEA、DEA溶液吸收CO₂的效率降低且随着飞灰浓度的提高其影响有增加趋势，而飞灰对CO₂吸收效率降低的影响与其化学成分关系不大；MEA溶液、MEA-飞灰溶液、DEA溶液和DEA-飞灰溶液吸收CO₂的效率随着溶液温度、液气比和填料高度的增加均呈增加趋势；随着溶液温度或填料高度的增加，飞灰对MEA溶液吸收CO₂效率的影响变化较小，而对DEA溶液则影响显著；随着液气比的提高，飞灰对MEA、DEA溶液吸收CO₂效率的负面影响有下降的趋势。分析表明，飞灰的影响主要是通过改变吸收液初始分布而实现的。

关键词: 单乙醇胺, 二乙醇胺, 飞灰, CO₂捕集, 填料床, 吸收

Abstract: To master the effect of fly ash in coal-fired flue gas generated from power plants on CO₂ absorption efficiency by using MEA and DEA as the absorbents,experiments were carried out by using a self-designed packed column filled with θ-ring packing and introducing the fly ash into the liquid phase. The effect laws of the process conditions,including the solution temperature,the packed height,the liquid gas ratio and the fly ash concentration,on the fly ash action were studied. The results showed that the present of the fly ash can significantly reduce CO₂ absorption efficiency,and the effect of fly ash on the CO₂ absorption efficiency indicated an increasing tendency with the increase of the fly ash concentration,but this effect was not related to its chemical composition. With the increase of the solution temperature,the liquid-gas ratio and the packed height,CO₂ absorption efficiency of MEA solution,MEA-fly ash solution,DEA solution and DEA-fly ash solution showed a gradually increased tendency. With increasing solution temperature or packed height,the inhibiting effect of the fly ash on MEA almost kept invariability,but this effect on DEA was remarkable. With the increase of liquid-gas ratio,this effect was weakened. The analysis indicated that the effect of the fly ash can be achieved by changing the initial distribution of the absorption solution.

Key words: MEA, DEA, fly ash, CO₂ capture, packed bed, absorption

中图分类号:

TK123

谢文霞, 徐成威, 张军, 赵亚仙, 涂春民, 吕剑虹, 钟辉. 飞灰对单乙醇胺和二乙醇胺溶液吸收CO₂效率的影响[J]. 化工进展, 2017, 36(11): 4272-4278.

XIE Wenxia, XU Chengwei, ZHANG Jun, ZHAO Yaxian, TU Chunmin, LÜ Jianhong, ZHONG Hui. Effect of fly ash on CO₂ removal efficiency using MEA and DEA solution[J]. Chemical Industry and Engineering Progress, 2017, 36(11): 4272-4278.

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飞灰对单乙醇胺和二乙醇胺溶液吸收CO₂效率的影响

Effect of fly ash on CO₂ removal efficiency using MEA and DEA solution

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