摘要
采用夹点技术对连续重整生产过程进行用能分析,找出系统中用能不合理的环节,在不改变装置主要设备的前提下,针对这些环节对换热网络进行改造,实现了装置的节能降耗。现行换热网络热公用工程用量为43 664 kW,冷公用工程用量为25 139 kW。夹点温差确定为20℃,根据冷热组合曲线图,确定夹点位置在110℃处,最小热公用工程量为36 742 kW,最小冷公用工程量为18 216 kW,装置的节能潜力为热公用工程15.9%,冷公用工程27.5%。参考夹点设计原则并考虑现行的换热网络结构,提出了换热网络的改造方案:拆除一台加热炉,新增五台换热器和一台冷却器。最终可节约热公用工程4 584 kW,节能10.5%;节约冷公用工程4 580 kW,节能18.2%,节能效果显著。
The heat exchanger network of a continuous catalytic reforming unit is analyzed by using pinch technology,the unreasonable matches are found,and then the network is optimized on the promise that the main equipments will not be changed.The present exchanger network has 43 664 kW hot utilities and 25 139 kW cold utilities.The pinch temperature difference is set to 20 ℃.Based on the composite curves,the pinch point temperature is 110 ℃,the target value of the hot utilities is 36 742 kW and it＇s 18 216 kW of the cold utilities.So the energy-saving potential is 15.9% for the hot utilities and 27.5% for the cold utilities.Considering the pinch analysis principle and the present network structure,a retrofit scheme is proposed in which a heating furnace is dismantled,a cooler and five heat exchangers are added to the unit.Finally this scheme can save 4 584 kW hot utilities and 4 580 kW cold utilities,i.e.the scheme can save hot and cold utilities by 10.5% and 18.2%.The result of energy-saving is high significant.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2012年第2期108-112,共5页
Journal of North China Electric Power University：Natural Science Edition
关键词
夹点技术
连续重整
换热网络
节能
pinch technology
continuous catalytic reforming
heat exchanger network
energy-saving
