甲苯歧化装置的用能分析和节能改造  

Analysis and Revamp on Toluene Disproportionation Unit for Energy Saving

作　　者：李良[1] 陈英建 Li liang;ChenYingjian(Sinopec Zhenhai Refining and Chemical Company,Ningbo Zhejiang 315200,China)

机构地区：[1]中国石化镇海炼化分公司,浙江宁波315200

出　　处：《石油石化绿色低碳》2018年第6期8-12,38,共6页Green Petroleum & Petrochemicals

摘　　要：利用夹点技术对甲苯歧化装置换热网络进行分析,确定其潜在节能量为28 723.44 kW及用能不合理的位置。缠绕管换热器换热系数高、抗结垢性能优异,因此提出该装置换热网络的改造方案为更换反应进料/反应出料换热器为缠绕管式换热器,以降低其热端温差。介绍了节能改造后缠绕管换热器热端温差、管程压差、壳程压差、反应加热炉温升等情况,改造后年创效益1 364.20万元,换热器改造投资回收期约2年。Pinch technology is used to check out the heat exchange network in disproportionation unit, revealing energy-saving potential up to 28 723.44 kW and identifying unreasonable energy use links. Given the high heat transfer coefficient and the excellent anti-scaling property of coil-wound heat exchanger, it is recommended to replace the previous reaction feed/discharge heat exchanger in revamping the heat exchange network in disproportionation unit, so as to narrow temperature difference at hot side of the heat exchanger. This paper outlines the operation results after revamping, such as the temperature difference at hot side, differential pressure at cold side, and differential pressure at hot side of the heat exchanger, as well as the temperature rise for the reaction feed crossing the heating furnace. The revamp has brought about annual benefit of 13.642 million yuan, with investment payback period of two years, meaning that the coil-wound heat exchanger has excellent anti-scaling property, operational stability and energy saving effect.

关 键 词：缠绕管式换热器 夹点技术 换热网络 节能 

分 类 号：TQ241.12[化学工程—有机化工]