液氨卧罐液体实时连续泄漏建模及分析  

Modeling and analysis of liquid real-time continuous leakage in horizontal liquid ammonia tank

作　　者：何娟霞 周冬梅 刘磊 周琪勇 黄丽文 姚健庭 Juanxia HE;Dongmei ZHOU;Lei LIU;Qiyong ZHOU;Liwen HUANG;Jianting YAO(College of Resources,Environment and Materials,Guangxi University,Nanning,Guangxi 530004,China;College of Materials Science and Engineering,South China University of Technology,Guangzhou,Guangdong 510641,China)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004 [2]华南理工大学材料科学与工程学院,广东广州510641

出　　处：《过程工程学报》2021年第6期731-740,共10页The Chinese Journal of Process Engineering

基　　金：2016年度广西科技厅重点研发计划(编号:桂科AB16380288)。

摘　　要：基于范德瓦耳斯方程和流体力学理论,考虑液氨卧罐泄漏时罐压和液面面积变化,建立了液氨卧罐液体实时连续泄漏模型。利用模型对某制冷企业液氨卧罐进行数学模拟,并将计算结果与PHAST模拟结果进行对比分析。结果表明,液面高度h下降幅度先减缓后变大,液体泄漏质量流率Qm和泄漏孔处液体泄漏速率v的下降幅度及泄漏液体质量m的增加幅度逐渐减缓。泄漏开始时,Qm和v值最大;泄漏停止时,m值最大。泄漏孔径为5,30和100 mm时,泄漏时间t为29884.027,837.289和77.550s,Qm(max)为0.552,19.913和221.160 kg/s,v(max)为46.733 m/s,m(max)为10255.649,10339.923和10572.760 kg。模型计算结果与PHAST模拟结果偏差小于24%,从参数变化规律和风险应急分析,模型对液氨卧罐液体泄漏理论计算具有一定适用性。Based on Van der Waals equation and theory of fluid mechanics,the liquid real-time continuous leakage model of horizontal liquid ammonia tank was established considering the changes of tank pressure and liquid surface area.Mathematical modeling of a horizontal liquid ammonia tank in a refrigeration company was performed by this model,and the calculation results were compared with PHAST simulation results.The results showed that the decreasing range of liquid level height h grew slowly and then increased quickly,the decreasing range of liquid leakage mass flow rate Qm and liquid leakage rate v and the increasing range of liquid leakage mass m decrease slowly.At the beginning of leakage,Qm and v were the maximum values,at the end of leakage,m was the maximum values.When the diameters of leakage hole were 5,30 and 100 mm,leakage time t were 29884.027,837.289,77.550 s,Qm(max)were 0.552,19.913 and 221.160 kg/s,v(max)was 46.733 m/s,m(max)were 10255.649,10339.923 and 10572.760 kg,respectively.The deviation between the calculation results of the model and the PHAST simulation results was less than 24%.From the analysis of parameter variation and risk emergency,the model had the certain applicability for the theoretical calculation of liquid leakage in horizontal liquid ammonia tank.

关 键 词：范德瓦耳斯方程 液氨卧罐 连续泄漏 模型 数学模拟 

分 类 号：TQ113.5[化学工程—无机化工] TQ053.2