对煤制甲醇的合成产物分离体系进行了设计与优化,提出了差压双效精馏实现系统内的热集成方案,应用Aspen Plus化工模拟软件建立了预分离塔-加压塔-常压塔的精馏工艺模型,并进行了计算与优化。结果表明,相同收率下新工艺较两塔工艺节能45%。为三塔双效精制甲醇工艺的工业化提供了依据。 The separation system of coal-to-methanol synthesis product was designed and optimized, and the differential pressure double-effect distillation was put forward to realize the heat integration scheme in the system. Aspen Plus chemical simulation software was used to establish the pre-separation tower-pressure tower-atmospheric tower Of the distillation process model, and the calculation and optimization. The results show that the new process can save 45% more energy than the two towers under the same yield. For the three towers of double-effect methanol purification process provided the basis.