化工进展

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节能型三塔N,N-二甲基甲酰胺回收工艺的用能分析及优化

施小妹,廖祖维,王靖岱,蒋斌波,阳永荣   

  1. 浙江大学化学工程与生物工程学系,化学工程联合国家重点实验室
  • 出版日期:2009-06-05 发布日期:2009-06-05

Energy-use analysis and optimization for DMF recovery technology

SHI Xiaomei,LIAO Zuwei,WANG Jingdai,JIANG Binbo,YANG Yongrong   

  1. State Key Laboratory of Chemical Engineering,Department of Chemical and Biochemical Engineering,Zhejiang University
  • Online:2009-06-05 Published:2009-06-05

摘要: 目前精馏方法回收制革废水中N,N-二甲基甲酰胺(DMF)的主要问题是工艺相对落后、能耗大。针对回收高能耗的问题,本文在对节能型三塔DMF回收工艺进行仿真模拟的基础上,结合精馏原理和夹点分析技术,采用塔总组合曲线(CGCC)的方法描述了各精馏塔内能流的分布状况,进而提出节能降耗的改进方案。提出的新流程与现有流程相比节约能耗6%。

Abstract: This paper deals with the analysis and optimization of a N,N-dimethylformamide (DMF) recovery process. The existing three-column energy-saving technique has been simulated with Aspen Plus software. By combining the process integration technology with simulation results, a column grand composite curve (CGCC) is established providing an energy saving target of the whole system. Subsequently, a modification of the process is proposed to improve the energy efficiency. Compared with the existing process, a 6% energy reduction can be achieved by such modification.

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