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基于事故后果分析法,对1个乙氧基化催化精馏塔(以环氧乙烷和甲醇为原料合成乙二醇单甲醚)紧急排空后因环氧乙烷扩散引起的危险性进行了定量分析。首先,通过模拟计算取得紧急排空时塔的操作条件及塔内未转化环氧乙烷的量等数据;其次,利用安全评价准则判定了紧急排空时环氧乙烷的排放类型和扩散类型;再次,应用高斯烟羽扩散模型,计算了环氧乙烷非重气云扩散的危险距离。研究表明,在不利的环境条件下,紧急排空的突发火(或爆炸)与中毒危险下风向最大距离可达35.2 m和97.4 m。本研究提供的事故后果信息将为塔的安全评价及应急预案制定提供理论依据。
Based on the accident consequence analysis method, the risk of ethylene oxide diffusion after an emergency evacuation of one ethoxylation catalytic distillation tower (ethylene glycol monomethyl ether synthesized from ethylene oxide and methanol) Quantitative analysis. First of all, through the simulation calculation, the operating conditions of the tower and the amount of unconverted ethylene oxide in the tower were obtained. Secondly, the safety assessment criteria were used to determine the types of ethylene oxide emissions and the type of diffusion during emergency evacuation Thirdly, the Gaussian plume diffusion model was used to calculate the dangerous distance of diffusion of ethylene oxide non-heavy cloud. Research shows that under unfavorable environmental conditions, the maximum distance of up to 35.2 m and 97.4 m in the direction of wind with emergency evacuation of sudden fire (or explosion) and danger of poisoning. The information of the accident consequences provided by this study will provide a theoretical basis for the safety assessment of the tower and the formulation of contingency plans.