化工学报2016，Vol.67Issue(10)：4203-4210,8.DOI:10.11949/j.issn.0438-1157.20160608
二段式吸收塔强化水洗技术提纯沼气过程
Process of two-stage absorption column to strengthen water scrubbing technology to purify biogas
摘要
Abstract
Pressure water scrubbing technology has become one of the key technologies of biogas purification. This paper adopted a packed absorption column to study on carbon dioxide removal. The influences of absorption pressure, absorption temperature, carbon dioxide content on the product gas and height of packing layer on carbon dioxide removal rate as well as those of liquid/gas ratio and biogas flow on volumetric overall absorption coefficient were investigated. At the same time, the intensive tests used a two-stage absorption column combined with a packed column and a spray column for purification process of pressure water. It was shown from the results that the increased absorption pressure, liquid-gas ratio and height of packing layer and reduced absorption temperature were favorable of removing carbon dioxide. Besides, volumetric overall absorption coefficient rose with increasing liquid/gas ratio and biogas flow. Two-stage absorption column was able to improve the effect of carbon dioxide absorption. When the biogas flow was 10 L·min−1, the height of packing layer 100 cm and carbon dioxide content less than 3%, about 12% of the amount of absorption liquid can be reduced by two-stage absorption column compared with the traditional packed tower. Furthermore, when the two-stage absorption column of 110 cm was used, the optimum purification effect can be obtained and the carbon dioxide removal rate can reach 97.4%.关键词
沼气/二氧化碳/压力水洗/二段式吸收塔/体积总吸收系数/生物甲烷Key words
biogas/carbon dioxide/pressure water scrubbing/two-stage absorption column/volumetric overall absorption coefficient/biomethane分类
能源科技引用本文复制引用
丁键,任佳佳,李峥,杨祝红,陆小华..二段式吸收塔强化水洗技术提纯沼气过程[J].化工学报,2016,67(10):4203-4210,8.基金项目
国家重点基础研究发展计划项目（2013CB733503）；江苏高校优势学科建设工程资助项目。@@@@Foundation item:supported by the National Basic Research Program of China (2013CB733503) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) （2013CB733503）
