埋地含硫天然气管道泄漏问题的数值模拟

Numerical Simulation of the Leakage Problem of Buried Sour Gas Pipeline

针对埋地含硫天然气管道泄漏问题,采用有限体积法,建立埋地高含硫天然气管道泄漏扩散模型和燃烧模型,考虑土壤对泄漏气体的影响,在风场影响下,对比分析埋地含硫天然气管道泄漏时有毒气体的扩散情况和发生燃烧后有毒气体的扩散情况,得出泄漏气体燃烧扩散比单一的气体泄漏扩散更加危险,燃烧产物二氧化硫为主要危害气体,同时,存在大量的二氧化碳和水蒸气以及未发生反应的硫化氢,危害性极大,及时采取防范和急救措施。

Aiming at the leakage problem of buried sulfur-containing natural gas pipelines, the finite volume method was adopted to establish the leakage diffusion model and combustion model of buried high-sulfur natural gas pipelines. Considering the influence of soil on the leakage gas, and under the influence of wind field, the diffusion of toxic gas after the buried sulfur-containing natural gas pipeline leakage was compared and analyzed, as well as the diffusion of toxic gas after burning. It was concluded that the combustion diffusion of the leaked gas was more dangerous than the single gas leakage diffusion. The combustion product sulfur dioxide was the main hazardous gas. At the same time, there was a large amount of carbon dioxide, water steam and unreacted hydrogen sulfide, they were extremely harmful, precautions and first aid measures should be taken in time.