国内专利文献一种节能节水型高低压双塔甲醇精馏二甲醚生产工艺本发明涉及一种节能节水型高低压双塔甲醇精馏二甲醚生产工艺,该工艺包括将不同浓度的粗甲醇经过甲醇预热器预热后进入高压塔,并在高压塔 【Explanation】 A water-saving energy-saving double-column methanol distillation dimethyl ether production process The present invention relates to a water-saving high and low pressure double-column methanol distillation DME production process, which involves the different concentrations of Crude methanol after preheating methanol preheater into the high pressure column, and in the high pressure column