与发电联合的新型二甲醚生产流程设计和分析

Design and analysis of a new DME production process with power cogeneration

研究了一种将二甲醚(DME)合成与发电结合的新型流程,它采用甲烷空气催化部分氧化造气、含氮合成气制DME、尾气发电等技术,通过化工生产过程和动力过程的整合,既省去了昂贵的空分设备,又成功地降低了大量氮气带来的负面影响;使用AspenPlus对该联产流程进行了模拟,并在此基础上对新流程的能量和整体性能进行了详细分析,结果表明,在DME生产中使用甲烷空气造气并与发电联合是提高能量转换率和降低DME生产成本的一条新途径。

As an alternative fuel, dimethyl ether (DME) is likely used on a large scale in the future But it is high that the energy consumption and the cost of DME production using the traditional methanol dehydration technology Trying to solve this problem, this paper presents a new DME production process which combines DME synthesis and power generation The process includes catalytic partial oxidation of methane with air to produce syngas, DME synthesis from the syngas containing nitrogen and power generation using the tail gas The process saves the cost of oxygen, and decreases the negative effect of nitrogen in syngas Based on the simulation of the new co-production process with Aspen Plus, the energy utilization and system performance are analyzed in detail The results obtained here indicated that producing syngas with methane and air and combining power generation is the new way to improve the efficiency and decrease the cost