泄压与隔爆联用的粉尘爆炸压力特性

作为目前市场上运用最广泛的隔爆产品，隔爆翻板阀一般与泄压板联用，以防止粉尘爆炸传播。为了探究粉尘爆炸时泄压与隔爆联用对容器内压力及隔爆效果的影响，进行了工业规模的粉尘爆炸实验。实验结果表明:由于隔爆翻板阀的影响，容器内部出现了二次峰值压力；随着隔爆翻板阀安装距离的增加，容器内两个峰值压力的时间间隔从28.2 ms增加到62.3 ms，且到达隔爆翻板阀前的峰值压力从0.067 MPa上升至0.101 MPa；泄压面积的增大会导致容器内部和隔爆翻板阀前端峰值压力降低，并可能导致隔爆失败。

Pressure Characteristics of Dust Explosion in Combination of Pressure Relief and Explosion Isolation

As the most widely used explosion isolation product on the market, explosion isolation flap valves are generally used in conjunction with explosion venting plates to prevent the dust explosion propagation. In order to explore influence of the combined use of pressure relief and explosion isolation on pressure in the container and effect of explosion isolation, an industrial scale dust explosion experiment was carried out. The experimental results show that, due to the influence of explosion isolation flap valve, the internal pressure of the container has a secondary peak. With the increase of installation distance of the explosion isolation flap valve, time interval between the two pressure peaks in the container increases from 28.2 ms to 62.3 ms, and the pressure peak at the front end of the explosion isolation flap valve increases from 0.067 MPa to 0.101 MPa. The increase of the explosion venting area will lead to the decrease of the pressure peak inside the container and at the front end of the flap valve, and it might also cause explosion isolation failure.