玉米秸秆气化燃气泄漏数值模拟研究

Numerical Simulation of Corn Straw Gasification Gas Leakage

通过采集沈阳某生物质气化站的相关数据,利用GAMBIT软件建立几何模型,使用FLUENT软件对秸秆气化泄漏进行数值模拟研究。模拟了玉米秸秆气化装置正常运行期间净化间内燃气输送管道以3种速度泄漏,CO气体的质量分数分布随时间的变化规律。研究结果表明,障碍物对燃气泄漏扩散有阻碍作用,泄漏气体易在障碍物附近聚集,增加中毒事故发生的可能性;气化燃气泄漏211 s后禁止人员在未采取任何防护措施的情况下进入净化间。

By collecting relevant data of a Shenyang biomass gasification station,and using GAMBIT software to build geometric models,FLUENT software is applied to simulate the gasification leakage of straw is studied.In this paper,the gas pipeline in the purification room during normal operation of the corn straw gasification device is simulated in conditions of 3 kinds of velocity leakages,as well as the variation rules of CO mass fraction distribution with time.The results show that,obstruction can hinder the diffusion of gas leakage,and the leakage gas is easy to gather near the obstacles,increasing the possibility of poisoning accidents.After 211 s of the gasification gas leakage,it is prohibited to enter the purification room without any protective measures.