The shockwave and high-temperature flame of dust explosion in the dust collector are often transmitted through the dust removal pipeline, and then cause secondary harm. In this study, the dust explosion propagation in a typical dry dust collector connected with dust removal pipelines was studied by CFD. The impacts of static activation pressure of the pressure relief panels on the explosion propagation were also addressed. The dust explosion propagation in the dust removal pipeline showed multiple accelerated combustion processes and severe pressure shocks. The explosion pressure and temperature first increase and then decrease along with the pipeline. Under a higher static activation pressure, the maximum explosion pressure along with the pipeline increases by 144%, where the average velocity of the dust propagation, dust consumption, pressure shock wave, and flame propagation increase by 82.2%, 32.1%, 25.3%, and 70.1%, respectively. When the static activation pressure increases from 0.01 MPa by more than 25%, the changes of the dust explosion pressure and flame propagation in the pipeline are observed limited. The explosion-proof valve should be set between 5 m and 10 m in the dust removal pipeline. And the lower the static activation pressure, the closer the explosion-proof valve. This research provides a scientific basis for the effective control of dust explosion disasters in dust removal systems.

除尘器中粉尘爆炸的冲击波和高温火焰往往通过除尘管道传播，进而造成二次危害。本研究采用CFD方法研究了典型的干式除尘器与除尘管道相连的粉尘爆炸传播过程。压力释放板的静态激活压力对爆炸传播的影响也得到了解决。除尘管道内的粉尘爆炸传播表现为多次加速燃烧过程和严重的压力冲击。爆炸压力和温度随管道先升高后降低。在较高的静态活化压力下，最大爆炸压力随管道增加 144%，其中粉尘传播的平均速度、粉尘消耗、压力冲击波和火焰传播分别增加了 82.2%、32.1%、25.3% 和 70.1%。当静态活化压力从 0.01 MPa 增加超过 25% 时，观察到管道中粉尘爆炸压力和火焰传播的变化是有限的。除尘管道中的防爆阀宜设置在5m～10m之间。并且静态启动压力越低，防爆阀越接近。该研究为除尘系统粉尘爆炸灾害的有效控制提供了科学依据。除尘管道中的防爆阀宜设置在5m～10m之间。并且静态启动压力越低，防爆阀越接近。该研究为除尘系统粉尘爆炸灾害的有效控制提供了科学依据。除尘管道中的防爆阀宜设置在5m～10m之间。并且静态启动压力越低，防爆阀越接近。该研究为除尘系统粉尘爆炸灾害的有效控制提供了科学依据。