低浓度煤层气输送阻火器设计参数优化分析
Optimization analyses of design parameters of flame arrestor for low concentration coalbed methane transportation
唐文哲 1张群 2陈玉涛 2马峰 1肖露2
作者信息
- 1. 淮北矿业股份有限公司电力分公司,安徽 淮北 235000
- 2. 煤矿灾害防控全国重点实验室,重庆 400037;中煤科工集团重庆研究院有限公司,重庆 400037
- 折叠
摘要
为保障低浓度煤层气的输送安全,实现"煤与瓦斯共采共用",对适用于低浓度煤层气输送安全保障系统的阻火器结构参数进行优化研究,并进行测试实验.结果表明:低浓度煤层气输送管路上的阻火器应优选具有足够强度的金属板波纹型阻火芯,以抵抗强烈的爆炸冲击波;为了使火焰在传播过程中被加速冷却后熄灭,并减小阻力,将阻火器设计加工成"中间粗、两头细"的结构,中间阻火芯的直径应足够大;优化设计的DN500 干式阻火器中,波纹板数量为 2、间距为 30 mm,波纹带厚度为0.25 mm,阻火芯外壳直径为1 500 mm,当煤层气流速为15 m/s时,阻力为670 Pa;当火焰传播速度低于775 m/s时,该阻火器可以成功阻火.
Abstract
In order to provide safety guarantee for the transportation of low-concentration coalbed methane and realize the"co-extraction and sharing of coal and gas"in coal mines,the flame arrestor structure parameters designed for the low-concentration coalbed methane transportation safety guarantee system were optimized and the experimental test were carried out.The results indicate that the flame arrestor on the low concentration coalbed methane transportation pipeline is more preferred as a metal plate corrugated flame arrestor core with sufficient strength to resist strong explosion shock waves.In order to accelerate the cooling of the flame during propagation and reduce resistance,the flame arrestors is designed and processed into a structure of"coarse in the middle and thin at both ends",and the diameter of the middle flame arrestor core should be large enough;for the optimized DN500 dry flame arrestor,the number of corrugated plates is two,the spacing between corrugated plates is 30 mm,the thickness of the corrugated belt is 0.25 mm,and the diameter of the flame arrestor core shell is 1 500 mm.When the coal seam airflow speed is 15 m/s,the frictional resistance is 670 Pa.The flame arrestor is capable to resist the flame when the flame propagation speed is below 775 m/s.
关键词
低浓度煤层气输送/阻火器/阻火芯/安全保障/火焰速度Key words
low concentration coalbed methane transportation/flame arrester/fire retardant core/security assurance/flame speed引用本文复制引用
基金项目
国家自然科学基金面上项目(52174227)
重庆英才计划创新创业示范团队项目(CQYC20210309699)
出版年
2024
NETL
NSTL
万方数据