CAJ | 학술논문

根据气动阀快速关断特性及成品油库发油系统事故特点，利用SPS软件，建立了某成品油库发油系统物理模型和逻辑控制关系，数值模拟了火灾事故，气动阀紧急切断后的管线压力变化情况，并重点分析了气动阀关断时间对管道瞬时水击压力的影响。研究表明：气动阀3s关断，管道各点最大瞬时水击压力均超过1.6 MPa，大部分超过2.0 MPa，气动阀10 s关断，只有泵出口附近管段的最大瞬时压力略超出1.6 MPa，且时间极短；而气动阀15 s关断，整个管道最大瞬时压力均低于1.6 MPa。考虑事故工况需紧急切断流程并防止次生水击危害，本工程建议气动阀关断时间在10~15 s为宜。
근거기동벌쾌속관단특성급성품유고발유계통사고특점，이용SPS연건，건립료모성품유고발유계통물리모형화라집공제관계，수치모의료화재사고，기동벌긴급절단후적관선압력변화정황，병중점분석료기동벌관단시간대관도순시수격압력적영향。연구표명：기동벌3s관단，관도각점최대순시수격압력균초과1.6 MPa，대부분초과2.0 MPa，기동벌10 s관단，지유빙출구부근관단적최대순시압력략초출1.6 MPa，차시간겁단；이기동벌15 s관단，정개관도최대순시압력균저우1.6 MPa。고필사고공황수긴급절단류정병방지차생수격위해，본공정건의기동벌관단시간재10~15 s위의。
Based on the characteristics of quick-shut off of pneumatic valve and accidents of loading system of refined oil store, a physical model and the logic control relation of the oil filling system of a refined oil store were established by using SPS software, then the pressure change caused by suddenly cut off of the pneumatic valve when fire accident occurred was numerically simulated, The influence of cut-off time of the pneumatic valve on the pipeline instantaneous water hammer pressure was also researched. The results show that, when the pneumatic valve is cut off in 3s, the maximum instantaneous water hammer pressure of each point of the pipe is greater than 1.6 MPa, most of that is even greater than 2.0 MPa; when the pneumatic valve is cut off in 10s, only the maximum instantaneous water hammer pressure of pipe near the pump discharge is briefly greater than 1.6 MPa;when the pneumatic valve is cut off in 15 s, the maximum instantaneous water hammer pressure of the whole pipeline is lower than 1.6 MPa. Considering the necessity of emergency closing process and avoiding the secondary water hammer, the cut-off time of the pneumatic valve is suggested to be 10~15 s.