几种二甲醚合成工艺的技术经济分析

为了比较新型二甲醚单产系统和联产系统的技术经济特性，构造了以LPDME浆态床二甲醚反应器为核心的一步法二甲醚合成系统及其模型。并对3种二甲醚合成系统进行了技术经济分析。结果表明，相对于LPDME二甲醚单产系统，新型二甲醚／动力联产系统的相对节能率为0．34％。对于20万t／年二甲醚产量规模，当天然气价格在0．66元／Nm^3、电价在0．25元／kWh情况下，二甲醚／动力联产系统的二甲醚成本最低。分析结果表明：在天然气资源丰富而价廉地区，新型二甲醚系统具有一定的经济优势。图6表3参15

Technical and Economic Analysis of Some Dimethyl Ether Production Technologies

For the purpose of comparing the technical and economic performances of new types of production systems, singularly producing dimethyl ether, with those coupled with Co-production, a one-step dimethyl ether synthesis system, based on LPDME pulp bed, has been designed and modeled. An ec.anomic analysis of three types of dimethyl ether synthesis has been conducted, which shows that the relative energy saving rate of the new type DME/power co-production amounts to 0.34% as compared to the LPDME system. Assuming the current price of natural gas to be 0.66 Yuan/Nm^3 and that of electric power 0.25 Yuan/kWh, production cost of the dirnethyl ether/power co-production system would be lowest for a presupposed production scale of 200,000 tons of dimethyl ether per year. Analysis results indicate that in districts, where there is plenty of cheap natural gas, the new type of dimethyl ether production system has certain economic advantages. Figs6, tables 3 and refs 15.