环氧氯丙烷装置过程模拟与节能研究  

Study on Process Simulation and Energy Saving of Epichlorohydrin Unit

作　　者：刘霞[1] 周新明 夏力[1] 项曙光[1] LIU Xia;ZHOU Xin-ming;XIA Li;XIANG Shu-guang(Qingdao University of Science &Technology,Shandong Qingdao 266042,China)

机构地区：[1]青岛科技大学过程系统工程研究所,山东青岛266042

出　　处：《当代化工》2018年第12期2624-2629,共6页Contemporary Chemical Industry

基　　金：国家自然科学基金项目;项目号:21406124

摘　　要：运用Aspen Plus对环氧氯丙烷装置进行了模拟。以模拟结果为基础,夹点技术为用能诊断工具,对装置的用能情况进行分析并提出节能建议。将模拟结果与实际操作数据对比后可知,建立的数学模型能够反映装置的运行情况,模拟结果能够作为进一步节能研究的基础数据。依据经验判断法,装置的夹点温差设为20℃,利用总组合曲线,确定系统需要的最小热公用工程用量为8 635.44 kW,最小冷公用工程用量为17 904.07k W。对比可知,装置冷、热公用工程的节能潜力分别为3 152.92、3 158.53 kW。对换热网络中不符合夹点设计规则的换热匹配进行改造,提高能量的回收率。改造后的方案需新增4台热交换设备,可节约2 875.13 kW的公用工程,热公用工程可节约24.39%的能耗,冷公用工程可节约13.65%的能耗,投资回收期为0.18年,对环氧氯丙烷装置的节能研究具有一定的指导意义。The epichlorohydrin plant was simulated by Aspen Plus. Based on the simulation results, the pinch technology was used as a diagnostic tool to analyze energy utilization condition of the plant, and suggestions for energy saving were put forward. After comparing the simulation results with the actual operating data, the mathematical model can reflect the operation condition of the device, and the simulation results can be used as the basic data for further energy saving research. According to the empirical judgment method, the temperature difference between the pinch points of the device is set to 20 ℃. Using the total combination curve, the minimum required amount of hot utility for the system is determined to be 8 635.44 kW, and the minimum amount of cold utility is 17 904.07 kW. The energy saving potential of the cold and hot utility projects is 3 152.92 kW and 3 158.53 kW respectively. Heat exchangers in heat exchanger networks that do not meet the pinch design rules are modified to improve energy recovery rate. The reformed scheme requires 4 new heat exchange equipments, which can save 2874.13 kW utility, 24.73% energy consumption can be saved in thermal public projects, 13.65% energy can be saved in cold utility projects, and the investment recovery period is 0.18 years. The study of the energy-saving of epichlorohydrin devices has certain guiding significance.

关 键 词：夹点技术 换热网络 环氧氯丙烷 节能 

分 类 号：TQ222[化学工程—有机化工]