氯乙烯的泄漏扩散模拟

Model of drain diffusion of chloroethylene

概括和评价了有毒气体泄漏扩散过程的数学模型,包括Gaussian模型、Gaussian轨迹烟云模型、BM模型、Sutton模型及FEM 3模型.以氯乙烯为研究对象,用简化的三维扩散模型描述氯乙烯在复杂气象条件下的扩散过程,分析了氯乙烯的扩散距离与浓度的关系.结果表明:当氯乙烯的泄露速率为1 m/s时,在中度不稳定大气条件下,泄漏半径500 m以内为危险区域;在中度稳定大气条件下,泄漏半径1 000 m以内为不安全地带.

The mathematical models of the leakage diffusion of poisonous molecules were reviewed in this paper, in which include Gaussian model,BM model,Sutton model and FEM 3 model. According to the characteristic of Chloroethylene, the diffusion process was described with the simplified 3- dimenssion diffusion model at the stable and instable atmosphere. Next, the relationship of the diffusion concentration with the distance was discussed. The results showed that when the leakage rate was 1 kg/s, the dangerous area was in the drain radius of 500 m at the instable atmosphere and the unsafe space was in the drain radius of 1000 m at the instable atmosphere for toxic gas Chloroethylene.