天然气化工（C1化学与化工）2016，Vol.41Issue(3)：65-70,6.
甲醇制丙烯（MTP）分离工艺的研究与优化
Research and optimization of the separation process of methanol to propylene (MTP)
摘要
Abstract
The 1.7 mt/a methanol to propylene (MTP) plant has arisen lots of problems during its procevarious sdesign and operation, and the existing separation process needs to be improved. The objective of this paper is to compare many of the available demethanizer exhaust gas recovery technologies, and presents an optimized separation process scheme. Various front-end deethanizers, demethanizers and their exhaust gas recovery processes, thermal coupled C2 hydrocarbons separation systems (deethanizers and ethylene rectification columns) and absorbent selection are discussed. Under the operating conditions of the 1.7 mt/a methanol to propylene plant, simulation and optimization of different combinations of exhaust gas recovery system, thermal coupled C2 hydrocarbons separation system and absorbent selection are presented. As a result, the process scheme with a combination of the front-end deethanizer exhaust gas recovery system, the demethanizer exhaust gas recovery system, the C2 hydrocarbons separation system with a high degree of thermal coupling and using the products from deethanizer bottom as absorbent is more appropriate than the existing separation process. Taking the MTP plant with acapacity of 480,000t/a propylene and 180,000t/a ethylene as an example, when employing the above described process, the dual compressor power consumption is 20,703kW, ethylene and propylene losses from the demethanizer exhaust gas are 12 t/a and 2 t/a, respectively.关键词
热偶合精馏/分离工艺/甲醇制丙烯(MTP)/乙烯/丙烯/优化Key words
heat integration distillation/separation process/methanol to propylene (MTP)/ethylene/propylene分类
化学工程引用本文复制引用
王子宗,刘洪谦,王基铭..甲醇制丙烯（MTP）分离工艺的研究与优化[J].天然气化工（C1化学与化工）,2016,41(3):65-70,6.基金项目
中国石化股份公司委托开发项目（合同号412101）。 （）
