文献类型：期刊文献

中文题名：涂料生产行业RTO设备典型爆炸及泄爆过程模拟

英文题名：Simulated study of the blasting process of the RTO installation and facilities in the coating production industry

作者：刘长军[1];闵春燃[1];沈晓波[2]

机构：[1]华东理工大学机械与动力工程学院,承压系统与安全教育部重点实验室,上海200237;[2]华东理工大学资源与环境工程学院,国家环境保护化工过程环境风险评价与控制重点实验室,上海200237

年份：2020

卷号：20

期号：4

起止页码：1369

中文期刊名：安全与环境学报

外文期刊名：Journal of Safety and Environment

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金青年科学基金项目(51604121)。

语种：中文

中文关键词：安全工程;挥发性有机气体;蓄热式废气焚烧炉;泄爆;Fluent

外文关键词：safety engineering;VOCs;RTO;explosion release;Fluent

摘要：采用Fluent软件建立典型的物理模型及数值模型来模拟RTO燃烧室发生苯气体爆炸事故及其泄爆过程。结果表明:点火源设置在RTO底部且泄爆口设置在顶部时,更有利于保证RTO设备的系统安全。泄爆口开启后,燃烧室内的压力会在20 ms内达到常压,泄爆过程普遍存在二次峰值现象。燃烧室爆炸过程中燃烧室内达到压力峰值的时间随初始温度的升高而缩短,最大爆炸压力随温度升高而减小;燃烧室内达到的爆炸压力峰值随苯蒸气-空气初始化学计量比的增大呈现先增大后减小趋势,在化学计量比为1.4时,爆炸压力峰值最大。
The purpose of this paper is to study the explosion and the deflating tendency of the benzene vapor-air mixture in the RTO combustor and disclose the temperature and pressure changing regularity in the explosion of the vapor-air benzene mixed gas.For this purpose,we have managed to establish a physical model and combustion chamber numerical model through a simulated study of the explosion process of such benzene mixed gas by taking the influent software system.The simulated study let us observe and analyze the explosion pressure in the combustion chamber with the time variation change under the different initial conditions.In the meantime,we have also gained the cloud chart of the temperature change in the combustion chamber.Thus,the result of the above experimental results and observation help to disclose that the initial status of benzene vaporair mixture tends to have strong impact on the characteristic feautres of the likely explosion pressure and the flame propagation.However,the time of the peak value of the explosion pressure gained in the combustion chamber tends to shrink with the rising of the initial temperature.And,later,the peak value of the explosion pressure may tend to decrease with the rising of the temperature.On the other hand,the speed of the flame propagation may tend to accelerate with the rising of the initial temperature,whereas the peak value of the explosion pressure in the combustion chamber may tend to increase first and then decrease with the increase of the initial stoichiometric ratio of benzene vapor-air.And,exactly speaking,when the stoichiometric ratio comes to 1.4,the peak-explosion pressure may arrive at its greatest value.The setting of the deflating vent of the explosion can help to effectively reduce the peak explosion stress.And,furthermore,when the ignition source is set at the bottom of the RTO and the deflating vent is set at the top value,it would be quite easy to release the pressure.And,then,if the deflating vent is turned on,it won’t be difficult for the pressure in the combustion chamber to reach the normal pressure during a period of 20 ms.And,during the process of the pressure deflation,it would be quite usual and natural that there may appear 2 expected peak values.