分析了蒸汽机械再压缩(MVR)热泵浓缩工艺的节能原理和适用工况,并以DMAC水溶液的浓缩为研究对象,提出了三效MVR热泵蒸馏浓缩工艺.采用Aspen Plus过程模拟软件中的Compr压缩机模块和Radffac精馏模块,并以能耗最低为目标函数,对三效MVR热泵蒸馏浓缩工艺和三效蒸馏蒸发浓缩工艺分别进行了模拟与优化,得到了合适的工艺操作参数.研究结果表明,与三效蒸馏蒸发浓缩工艺相比,三效MVR热泵蒸馏浓缩工艺节能约68.7％,其平均能效比COP值为0.863.多效MVR热泵蒸馏浓缩工艺具有较大的经济优势.%The energy-saving principle and applied working conditions of heat pump concentration technology of mechanical vapor recompression (MVR) is analyzed.The object of this study is the concentration of DMAC water solution,and the triple effect MVR heat pump distillation concentration process is introduced,simulating Compr compressor module and Radfrac distillation module by Aspen plus,with minimum energy consumption as the objective function,optimized triple effect MVR heat pump distillation concentration process and triple effect distillation evaporation and concentration process,the suitable technical parameters is established.The research results showed that the triple-effect MVR heat pump distillation and concentration process could save energy by 68.7％ compared with the triple effect distillation evaporation and concentration process,the average COP reached 0.863,and the multi-effect MVR heat pump distillation concentration technology had great economic advantages.
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