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针对传统的DMF回收工艺的高能耗，本文提出多效精馏回收d MF的双塔、三塔和四塔工艺流程。
Because of the high energy consumption for recovery of DMF, Multi-effect distillation processes including two-tower, three - tower and four-tower were proposed.
针对传统DMF回收工艺存在的高能耗问题，提出多效热泵精馏回收DMF工艺流程。
High energy consume for recovery of DMF by convention distalliation, a multi-effect heat pump distillation for recovery DMF was proposed.
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