BENT/AM/AA高吸水凝胶防治煤矿火灾实验研究
Experimental Study on Controlling Coal Mine Fire by Ternary Copolymerized Super Absorbent Gel of BENT/AM/AA
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摘要: 研究了膨润土(BENT)/丙烯酰胺(AM)/丙烯酸)AA)三元共聚高吸水凝胶的制备及其防灭火性能。通过正交实验研究了最佳的凝胶配比参数,并采用程序升温实验对凝胶的防灭火参数进行了分析。研究结果表明:在丙烯酰胺/丙烯酸的质量比为110%、膨润土/丙烯酸的质量比为10%、硼酸/丙烯酸的质量比为0.06%、过硫酸钾/丙烯酸的质量比为0.90%、中和度为80%、温度为90 ℃时,可得到吸水倍率为1 011.5的高性能吸水凝胶;在完全失水的状态下,当该凝胶的吸水量为250~550 mL/g时,阻化率可达到77%。最后,基于采空区灭火的物理相似模拟实验,对水与凝胶的防灭火性能特点进行了对比研究,结果显示:在矿井防灭火上,凝胶比水更具有优势。Abstract: In this paper, the preparation process of bentonite(BENT)/acrylamide(AM)/acrylic acid (AA) ternary copolymerized absorbent gel and its fire extinguishing performance were studied. The optimum gel matching ratio parameters were studied by orthogonal experiment and the fire extinguishing parameters of the gel were analyzed by using the programmed temperature experiment. The results showed that when the mass ratio of acrylamide/acrylic acid is 110%, the mass ratio of bentonite/acrylic acid is 10%, the mass ratio of boric acid/acrylic acid is 0.06%, the mass ratio of potassium persulfate/acrylic acid is 0.90%, neutralization degree is 80%, temperature is 90 ℃, a kind of high performance water-absorbing gel with the water absorption ratio of 1 011.5 was obtained. In the state of complete dehydration, when the water absorption of the gel is 250 ml/g to 550 ml/g, the inhibitor ratio can reach to 77%. Finally, based on the physical similarity simulation experiment of fire extinguishing in goaf, the fire extinguishing performance of water and gel was tested. The results show that the gel is more advantageous than water in the mine fire prevention.
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