干水材料对瓦斯爆燃抑制的实验研究

Experimental study on suppression of gas deflagration by dry water materials

为了研制绿色环保高效的抑爆剂,以疏水型气相二氧化硅和去离子水为原料,采用机械搅拌法制备具有“固包液”结构的干水材料。利用20L近球形爆炸装置测试干水材料对瓦斯爆燃的抑制效果。实验结果表明:当添加的干水材料较少(2g和3g)时,干水材料对瓦斯爆燃产生促进效果;当添加的干水材料大于4g时,对瓦斯爆燃有抑制效果。通过研究不同粒径的干水材料对瓦斯爆燃的影响,发现干水材料的粒径对瓦斯爆燃最大压力的影响较小,但显著影响最大爆燃压力上升速率;对比不同类型改性干水材料对瓦斯爆燃的抑制效果,综合比较得出抑制效果由强到弱顺序为:尿素改性干水材料、磷酸二氢铵改性干水材料、聚磷酸铵改性干水材料、普通干水材料。

In order to develop green,eco-friendly and highly efficient explosion suppression agent,hydrophobic fumed silica and deionized water are used as the raw materials to prepare novel dry water materials with“water encapsulation by solid”structure by a mechanically stirring method.A 20 L nearspherical explosive device is employed to test the explosion suppression effect of dry water materials on methane deflagration.The experimental results show that,when the mass of the added dry water materials is 2 g and 3 g,it has a promoting effect on the gas deflagration;when the mass of dry water materials is more than 4 g,it has a suppression effect on gas deflagration.The effect of particle size of dry water on the inhibition performance is investigated.The particle size of dry water materials has less influence on the maximum deflagration pressure,but it greatly influences the maximum deflagration pressure rising rate.The explosion suppression performances of the modified dry water materials are compared with that of pure dry water.The suppression effects are ordered from strong to weak as:urea-modified dry water materials,ammonium dihydrogen phosphate-modified dry water materials,ammonium polyphosphate-dry water materials and pure dry water materials.