主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (9): 1345-1349.

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厌氧反应器中沼气泄漏扩散模拟研究

闫伟阳   

  1. 中国石化集团资产经营管理有限公司扬子石化分公司水厂，江苏 南京210048
  • 出版日期:2021-09-15 发布日期:2021-09-15
  • 作者简介:闫伟阳（1992-），男，中国石化集团资产经营管理有限公司扬子石化分公司水厂助理工程师，硕士，主要从事污水处理装置技术管理工作，江苏省南京市六合区乙烯大道，210048。

Simulation on the leakage and diffusion of biogas from anaerobic reactor

YAN Wei-yang   

  1. SINOPEC Group Asset Management Co.， Ltd.，Yangzi Petrochemical Branch Company Water Plant, Jiangsu Nanjing 210048, China
  • Online:2021-09-15 Published:2021-09-15

摘要： 基于FDS建立沼气泄漏扩散模型，分别模拟管道接头破损、导凝管阀门破损和沼气突破水封，探究厌氧反应器中沼气泄漏扩散的基本规律。结果表明：当管道接头破损、导凝管阀门破损时，沼气泄漏后的危险范围为下风向处距离泄漏口约5 m；当沼气突破水封时，沼气泄漏后的危险范围为下风向处距离泄漏口约60 m；沼气突破水封的危险性最大；泄漏后的甲烷会向下风向膨胀扩散，但遇到障碍物时，窝风位置会出现甲烷积聚；当沼气发生类似突破水封的大面积泄漏时，固定桩式可燃气报警仪的预警作用非常重要。

关键词: 厌氧反应器, 沼气泄漏, 甲烷浓度, 模拟研究

Abstract: Based on FDS, the diffusion process of biogas result from the leakage in anaerobic reactors has been studied, and three typical scenarios of biogas leakage in an anaerobic reactor were simulated including the breakage at the pipe joints, the breakage at the conduction pipe valve and the methane gas breaking through the water seal. Results showed that when the pipe joint or the valve of the conduction pipe are broken, the risk range is about 5 m downwind from the leak. But when the biogas breaks through the water seal, the risk range is more than 60 m downwind from the leak. So the risk of the biogas breaking through the water seal is the greatest. The methane after the leakage will spread downwind. But when encountering obstacles, methane will also accumulate in the nest wind position. When large area leakage happens like the biogas breaking through the water seal, the warning of the fixed stake gas alarm is very important.

Key words: anaerobic reactor, biogas leakage, methane concentration, simulation study