Evaluation on heat blocking effect of jet radiation by pressurized flame based on CFD simulation
In order to evaluate the heat blocking effect of firewall as a safety barrier on the jet radiant of pressurized flame,a quantitative evaluation method of heat blocking effect was established by combining CFD simulation and individual risk cal-culation.Taking the pressurized flame generated by the leakage of ethylene reaction tower in a chemical enterprise as the re-search object,the thermal radiation intensity of pressurized flame acting on the adjacent storage tank in the original scene and adding the firewall were simulated by FLACS software,and the probability of domino effect and individual risk were calculat-ed.The results show that for the location where the surface of storage tank is relatively most affected by thermal radiation(ob-servation point 1),the thermal radiation intensity in the original scene is 310.69 kW/m2,and the accident will spread to the neighboring tank and produce a domino effect,with the probability of domino effect as 7.14 × 10-6.After the firewall is add-ed,the thermal radiation intensity decreases to 24.69 kW/m2,which is about 1/13 of that in original scene,and no domino effect occurs at this time.In the original scenario,the personal risk is 2.11 × 10-9,and 6.33 × 10-13 after adding the firewall,which is reduced by 4 orders of magnitude,indicating that the thermal blocking effect of firewall on the jet radiation of pres-surized flame is significant.The research results can provide some theoretical reference for the construction of safety strategies in chemical enterprises.
万方数据
维普
