中文摘要：

对某炼厂酮苯脱蜡溶剂回收系统进行流程模拟,由模拟结果提取冷、热物流参数,然后运用夹点技术对换热网络进行分析。在夹点分析结果的基础上,结合现有换热网络特点提出了改造方案。模拟结果表明,改造后的换热网络冷、热公用工程负荷分别下降了29.5%和31.7%,每年可节省操作费用371.3万元,新增设备费用182万元,可在半年内收回。

英文摘要：

The simulation of solvent recovery system for a butanone-toluene dewaxing process is performed. The parameters of cold and hot streams are first extracted and then the heat exchanger network（ HEN） of the system is analyzed with pinch approach. Based on the pinch analysis and the features of the original HEN,a retrofit scheme is proposed. The results show that the heat duties of the cold utility and heating utility in the retrofitted HEN are reduced by29. 5% and 31. 7%,respectively. The butanone-toluene dewaxing device can save annual running cost of 3. 713 million RMB. 1. 82 Million RMB of the invested equipment cost can be recovered in less than half year.