煤矿井下硫化氢气体的快速控制实验研究

摘要

Laboratory tests were carried out to select the optimal adsorbent to remove hydrogen sulfide in coal mine by sprinkling it into atmosphere.Characteristics of different adsorbents were investigated.The results show that Sodium carbonate shows a good initial hydrogen sulfide adsorption capability;however,the adsorption tail liquid is unstable that hydrogen sulfide can be readily emitted into atmosphere due to agitation or dilution;hydrogen sulfide is able to be oxidized into sulfur by adding an oxidant(NT) into the adsorption liquid,thus,hydrogen sulfide is removed from atmosphere instantaneously;in order to remove coal adhesive hydrogen sulfide,surfactant is added into absorbent to reduce the surface tension of absorbent and expand permeation radius,thus increases the removal efficiency of internal hydrogen sulfide within coal.%通过实验室模拟试验选择合适的化学吸收药剂,并以喷雾的方式使药剂与空气中的硫化氢充分接触,从而达到快速去除矿井下硫化氢的目的。试验结果表明：碳酸钠虽然对硫化氢有较好的初始去除率,但其吸收后产生的吸收尾液不稳定,在水流的扰动及稀释作用下,硫化氢会从溶液中逸出而再次释放到空气中;通过在吸收液中加入一种代号为NT的氧化剂可使吸收后的硫化氢直接氧化为单质硫,从而快速彻底地去除空气中的硫化氢;针对煤体内部赋存的硫化氢,可以通过在吸收液中加入表面活性剂以降低吸收液的表面张力,增加渗透半径,提高对煤体内部吸附的硫化氢的去除效率。