F22裂解制TFE工艺本质安全—急冷降温非稳态分析  

The Intrinsic Safety of F22 Cracking to TFE Process—Water-Quencher Unsteady Analysis

作　　者：曾际颖 秦杨梅 郭世蒙 肖泽仪[1] 樊森清 

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《四川化工》2018年第1期38-44,共7页Sichuan Chemical Industry

基　　金：四川省安全生产科技项目(scaqjgjc_stp_20150018)

摘　　要：利用热量动态平衡方程,分别以裂解气、冷却水及气相空间为研究对象,建立四氟乙烯(TFE)裂解气急冷器非稳态数学模型。结果表明在升压阶段,裂解气出口温度短时间迅速降低后保持稳定,急冷器压力经历2036s后缓慢增加到稳压控制压力0.35MPa。稳压阶段,逐渐开启气体出口阀门,并保持最大气体出口流量运行,裂解气出口温度、冷却水温度和急冷器压力出现短时波动后随时间缓慢降低。采用模糊综合评价指数模型对急冷器非稳态过程进行本质安全量化分析,得到急冷器非稳态过程本质安全度曲线图,在升压和稳压初期,急冷器本质安全度分别有最低点和小幅度波动,但总体仍处于较高的水平,稳压阶段较升压阶段更加安全。The mathematical model of unsteady heat transfer for the water-quencher of TFE cracked gas was established by using the thermal dynamic equilibrium equation, and the cracked gas, cooling water and gas-phase space as the research objects. The result shows that in the pressure-rising period, cracked gas temperature decreased very quickly at first, after that stay stable. The water-quencher pressure increased to 0.35MPa the steady control pressure takes 2036s. In the pressure-controlling period, when open the exit valve gradually and stay maximum opening, bringing a small fluctuation of cracked gas temperature, cool- ing water temperature and water-quencher pressure in a short time and these parameters decreased gradu- ally with time. The fuzzy comprehensive evaluation index model was used to analyze the unsteady process of water- quencher. The calculated intrinsic safety curve of the non-steady-state process shows that water- quencher intrinsic safety has the smallest date and a little fluctuation at the early time of pressure-rising and pressure-controlling, but still stay a high level, pressure-controlling period is safer than pressure-ris- ing.

关 键 词：四氟乙烯裂解气 急冷器 非稳态 模糊综合评价 本质安全 

分 类 号：TQ222.423[化学工程—有机化工]