摘要
二甲醚是一种重要的清洁能源,开发具有竞争力的二甲醚生产工艺已成为世界各国的研究热点,以煤为原料采用一步法生产二甲醚是最具发展前途的方法。管壳型合成反应器具有床层温度平稳、反应温度容易控制、能量利用合理、操作费用低等优点。为此,建立了绝热管壳型固定床一步法合成二甲醚合成反应器的一维数学模型,求得典型工况下的10×104t/a的二甲醚反应器床层内各组分的浓度和温度分布,并模拟计算进口温度(200～210℃)、操作压力(4.6～5.5MPa)对反应器床层温度分布和CO转化率的影响。结果表明,在操作压力4.6～5.5MPa下,提高操作压力能提高产量,入塔温度对反应的影响不大。研究结果可为工业反应器的设计提供依据。
Dimethyl ether is a kind of important clean energy and so the technology of DME production has been research hotspots all over the world.One-step DME synthesis from coal is one of the most potential methods at present.Therefore,this study set up a one-dimentional mathematical model on heat-insulated tube-shell type fixed-bed reactor for DME synthesis.Through simulation and calculation results,this study found out 100,000 tons of DME and 18,000 tons of methanol would be produced in a year if under favorable working conditions as follows:the temperature 210 ℃ of input feed gas,cooling water at 240 ℃,working pressure at 4.6 MPa,and the processing capacity of 3.0×105 Nm3/h.This study also concluded that the suitable working pressure would improve the working productivity;while comparatively the input temperature would have less impact on it.This study results will provide references for the design of reactors in many industries.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2008年第1期137-139,共3页
Natural Gas Industry
关键词
固定床
反应器
二甲醚
数学模型
合成
fixed-bed,reactor,dimethyl ether,mathematical simulation
