固态CO2-BLEVE过程中的压力与温度变化试验研究  

Experimental approach to the pressure and temperature changes in the solid CO2 BLEVE process

作　　者：李清[1,2] 张德平 孙瑞艳[3] 赵耀 LI Qing;ZHANG De-ping;SUN Rui-yan;ZHAOYao(School of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,Heilongjiang,China;Carbon Capture and Storage and Enhanced Oil Recovery of Jilin Oilfield of Petro China,Songyuan 138000,Jilin,China;Survey and Design Institute,Jilin Oilfield Branch of CNPC,Songyuan 138000,Jilin, China;Skate Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江大庆163318 [2]中国石油吉林油田公司二氧化碳捕集埋存与提高采收率开发公司,吉林松原138000 [3]中国石油吉林油田分公司勘察设计院,吉林松原138000 [4]北京理工大学爆炸科学与技术国家重点试验室,北京100081

出　　处：《安全与环境学报》2018年第6期2156-2162,共7页Journal of Safety and Environment

摘　　要：借助"CO2可视两相流动及爆炸试验装置"对固态CO2在热作用下发生蒸气爆炸的过程进行了试验研究。结果表明,容器内的CO2从上至下按过热气相、饱和气液两相、过冷液相分层存在,且温度从上部到底部逐步降低,热分层导致相同容器压力下液相的能量降低,影响了沸腾响应和压力恢复过程,泄放后压力下降幅度和下降速率越大,压力回升幅度及回升达到的最大压力也越大,大致呈线性关系。相对升压量与相对降压量之间存在很强的正相关性,即过热度越大,CO2发生蒸气爆炸强度越剧烈,压力反弹越大。In this paper,the author is aimed at presenting his experimental experience on the CO2 BLEVE in the laboratory condition,with the ejection process and microphase changing process in the vessel being recorded and checked with a high-speed camera.As a matter of fact,sudden rupture of the vessel full of liquefied carbon dioxide(CO2) is prone to generate the explosion of a boiling liquid expansion vapor cloud known as BLEVE due to the mechanism of CO2 BLEVE.In the above mentioned experiment,dry ice has to be used as the source of CO2.The results of the experiment indicate that,before the vessel rupture,the gas phase,the gas-liquid phase and the liquid phase itself remain to be distributed from the top to the bottom of the vessel,with the thermal stratification formed in the liquid zone.However,when the vessel got broken,the data of the experimental results would show that,both the volumes of repressurization and the rate of repressurization may tend to be proportional to those of depressurization and depressurization,respectively.What is more,the duration of the repressurization may turn typically to be an order of the magnitude longer than that of the pressure drop.Besides,the experimental results also indicate that BLEVE can still occur when the liquid temperature gets below that of the superheat limit one.In addition,BLEVE wouldn't occur if the liquid temperature gets beyond the said limit.Nevertheless,the blast effects were likely to be much higher,even to the superheat degree.Therefore,it would be not enough merely to judge the condition for CO2 BLEVE phenomenon by the highiest temperature limit as a parameter.Rather,the boosting capacity of the superheated liquid boiling gasification should also be positively correlated with it.For the greater the the degree of the superheat,the more intense the explosive boiling of the liquid would be and the greater the pressure rebound would become.Therefore,more experiments remain needed to verify whether a fixed proportional relationship between the relative depressurizati

关 键 词：安全工程 二氧化碳 沸腾液体扩展蒸气爆炸 

分 类 号：X937[环境科学与工程—安全科学]