膜吸收法脱除恶臭气体H_2S  

H_2S removal by membrane absorption

作　　者：李香莉[1] 曹利[1] 黄学敏[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055

出　　处：《环境工程学报》2016年第8期4382-4386,共5页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07315-001-04);陕西省自然科学基础研究计划项目(2014JQ7232)

摘　　要：选用聚丙烯中空纤维膜接触器为吸收器,Na OH水溶液为吸收剂,考察膜吸收法对H_2S的脱除效果。结果表明:正流程、逆流方式的脱硫效果优于反流程、并流;随着液体流量和液体浓度的增加,H_2S脱除率和总传质系数随之增大,但随气体流量的增加,H_2S脱除率减小,总传质系数增大;正交实验得出吸收剂浓度0.2 mol·L^(-1)、进气流量1 L·min-1、液体流量2.2 L·min-1为较优的膜吸收参数,此条件下H_2S脱除率可达99.94%,且各因子对H_2S脱除率的影响次序为:进气流量>液体流量>吸收剂浓度。Removal of H_2S by membrane absorption was studied. A hollow polypropylene fiber membrane contactor was selected as an absorber and sodium hydroxide solution was chosen as the absorbent. The desulfurization efficiency achieved with the positive process and countercurrent flow was better than that of the opposite process and co-current flow. The H_2S removal efficiency and the total mass transfer coefficient increased with an increase of the liquid flow and concentration. However,increasing the gas flow decreased the H_2S removal efficiency,whereas the total mass transfer coefficient increased. The orthogonal experiment demonstrated that an absorbent concentration of 0. 2 mol·L^-1,gas flow of 1 L·min- 1,and liquid flow of 2. 2 L·min- 1were the most favorable process parameters. The H_2S removal efficiency could reach 99. 94% under these preferential conditions. The effect of these factors on the H_2S removal efficiency decreased in the order： gas flow,liquid flow,and absorbent concentration.

关 键 词：膜接触器 H2S NAOH 脱除率 总传质系数 

分 类 号：X512[环境科学与工程—环境工程]