运用NFPA68进行液硫池泄爆面积计算的研究  

Research on Explosion Area Calculation of Liquid Sulfur Tank by Using NFPA68

作　　者：王弯弯 Wang Wanwan(China Chengda Engineering Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]中国成达工程有限公司,四川成都部610041

出　　处：《化工设计》2024年第3期23-25,30,1,共5页Chemical Engineering Design

摘　　要：液硫池是硫磺装置储存液硫产品的必备装置,它收集硫磺装置各级冷却器冷却经硫封后的液态硫磺,液态硫磺中H_(2)S浓度通常会达到约300μg/g,为减少H_(2)S气体浓度,会采用液硫脱气技术来脱除液硫中的H_(2)S气体,将其H2S浓度降低至10μg/g。因此,液硫池分为两个区:液硫脱气区和产品区,液硫经脱气设施脱气后溢流至产品区,通过液硫提升泵送出。由于液硫池中H_(2)S的存在,可能导致液硫池气相空间聚集大量H_(2)S气体,从而导致闪爆的发生。为避免爆炸带来的伤害及风险,首先应保证脱气设施运行正常,而最终的保护手段是利用泄爆口将爆炸产生的压力释放出去,目前并未有文献来探讨到底如何计算泄爆口。本文以中东某硫磺回收装置液硫池为例,探讨如何采用NFPA68-2018爆炸泄压指南来计算液硫池泄爆面积,这对于国内硫池泄爆口的设计有参考意义。The liquid sulfur tank is an essential equipment for storing liquid sulfur product in sulfur plants.It collects liquid sulfur that has been cooled by coolers at all levels of the sulfur plant and sulfur-sealed.The H2S concentration in the liquid sulfur usually reaches~300μg/g,in order to reduce the concentration of H_(2)S gas,liquid sulfur degassing technology will be used to remove H_(2)S gas from liquid sulfur,reducing its H_(2)S concentration to 10μg/g.Therefore,the liquid sulfur tank is divided into two areas:the liquid sulfur degassing area and the product area.The liquid sulfur is degassed by the degassing facility and overflows to the product area,which is then pumped out by the liquid sulfur lfting pump.Due to the presence of H_(2)S in the liquid sulfur tank,a large amount of H_(2)S gas may accumulate in the gas phase space,leading to the occurrence of flash explosions.How to avoid the harm and risks caused by explosions,the first step is to ensure the normal operation of the degassing facilities,and the ultimate protection method is to use the explosion vent to release the pressure generated by the explosion.Currently,there is no literature to explore how to calculate the explosion vent.This paper takes the liquid sulfur tank of a sulfur recovery unit in the Middle East as an example to explore how to use the NFPA68-2018 explosion pressure relief guide to calculate the explosion area of the liquid sulfur tank,which has reference significance for the design of explosion vent in domestic sulfur tanks.

关 键 词：液硫池 泄爆面积 泄爆口 NFPA68 

分 类 号：TE644[石油与天然气工程—油气加工工程]