煤矿乏风瓦斯富集中试试验研究  

Pilot-scale study of ventilation air methane enrichment

作　　者：杨雄[1,2] 张传钊[1] 孟宇[1] 刘应书[1,2] 李永玲[1,2] 李坚[3] 宋燕民 

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]北京科技大学北京高校节能与环保工程研究中心,北京100083 [3]北京工业大学环境与能源工程学院,北京100124 [4]北京时代桃源环境科技有限公司,北京100085

出　　处：《煤炭学报》2014年第3期486-491,共6页Journal of China Coal Society

基　　金：国家高技术研究发展计划(863)资助项目(2009AA063201);中央高校基本科研业务费专项资金资助项目(FRF-TP-13-011A;FRF-SD-12-006B)

摘　　要：针对煤矿乏风瓦斯浓度低,无法有效利用,并大量排放这一现状,对乏风瓦斯的富集开展了研究,建立了首套乏风瓦斯富集中试试验装置。试验装置瓦斯处理量为500 m3/h,采用三塔两级分离工艺,并引入了抽排和排放气充压的流程。研究结果表明,利用自主改性的椰壳活性炭可将甲烷浓度为0.2%的乏风瓦斯气体富集到1.2%以上;抽排流程用于乏风瓦斯富集中试系统可有效提高产品气浓度,如抽排比由0增大到0.224时,产品气中的甲烷浓度增大到了原来的1.89倍;吸附剂热效应对乏风瓦斯富集的影响较小,试验过程中吸附塔内温度波动不超过3℃。Amount of the coal mine ventilation air methane（VAM） is unable to be made effective use and discharges into the atmosphere for the low concentration of methane. It not only pollutes the environment but also results in a waste of energy resource. In this paper, the VAM was enriched experimentally. The first pilot VAM enrichment equip- ment with the gas processing capacity of 500 m^3/h was built. The plant included two-stage VPSA separation system with three parallel connected adsorbers respectively,where we introduced a new process with the effluent gas pressuri- zation step and vacuum exhaust step. By employing a modified coconut active carbon, the VAM concentration can raise from 0.2% to more than 1.2%. The result shows the vacuum emission process could enrich the concentration of the product significantly, when the vacuum exhaust ratio increase from 0 to 0. 224, the methane concentration of the prod- uct increases 1.89 times. The adsorption heat has little influence on the temperature of the adsorber, and the tempera- ture variation during the VPSA cycle is no more than 3 ℃.

关 键 词：变压吸附 乏风瓦斯 甲烷 活性炭 

分 类 号：TD712[矿业工程—矿井通风与安全]