低浓度煤层瓦斯水合物分离工艺功耗分析

Energy Consumption Analysis of Separating Technology for Low Concentration Mine Gas Hydrate

针对我国煤层瓦斯抽采浓度低与传统提纯方式分离系数低的问题,以太原理工大学自行水合物提纯实验数据为依据,提出一种低浓度煤层瓦斯水合物分离工艺,并依据热力学方程对其经济性进行分析。结果表明:在常压0.1 MPa、293 K初始条件下,1 MPa、278 K工作条件下,每提纯产出1 m^3纯CH_4只耗电0.77 k W·h,以工业电价折合为0.56元,具有良好的工业化推广经济基础。

For the problems of the low concentration in CBM drainage and the low separation factor in traditional gas separation methods,based on the experiment data of separating CH4 from low concentration CBM by Taiyuan University of Technology itself,a schematic of purifying mine gas through hydrate is proposed,and a analysis of it＇s economic application according to thermodynamic equations is analyzed. As the results show that,in initial condition of 0. 1 MPa,293 K,and work condition 1 MPa,278 K,it needs 0. 77 k W·h power to product 1 m3 pure CH4,in another word say,to get 1 m-3 pure CH4 will spend 0. 56 yuan. It is a promising way in economy to separate CH4 from low concentration mine gas.