新型煤尘化学抑尘剂配方优选实验

Formulation Optimization Experiment of New Chemical Dust Suppressant for Coal Dust

为有效解决抑尘剂对细微粉尘降尘效率低、喷雾对设备设施有腐蚀性等问题,基于化学抑尘剂工作机理,以表面张力、接触角、沉降时间及沉降时间为考察指标,从保水性和润湿性设计单体实验,从14种抑尘剂中优选出非离子型PAM、SA、JFC、DTAB这4种化学抑尘单体,并以正交实验为基础进行复配实验,优选出最佳抑尘剂配方为聚丙烯酰胺(非离子型PAM)、海藻酸钠、脂肪醇聚氧乙烯醚、月桂基三甲基溴化铵、牛脂胺,其质量分数分别为0.20%、0.15%、0.20%、0.09%、0.01%。实用性结果表明:该配方具有良好的降尘效果、安全性高、和腐蚀性低,全尘除尘率约为90.0%,PM10除尘率约为83.1%,呼吸性粉尘除尘率约为82.4%,PM2.5除尘率约为77.3%,PM1除尘率约为53.5%。

To effectively solve the problems of low efficiency of dust suppressant to fine dust and corrosion of spray to equipment and facilities,based on the working mechanism of the chemical dust suppressant,taking the surface tension,contact angle,sedimentation time and settling time as the indicators,the monomer experiments were designed from the aspects of water retention and wettability,and the four chemical dustproof monomers(non-ionic PAM,SA,JFC and DTAB)were selected from the 14 dustproof agents.On the basis of orthogonal test,the best dust inhibitor formulation is optimized as polyacrylamide(non-ionic PAM),sodium alginate,fatty alcohol polyoxyethylene ether,lauryl trimethylammonium bromide and bovine tallow amine,and the mass fraction is 0.20%,0.15%,0.20%,0.09%and 0.01%,respectively.The practical test results show that the formula has good dust-reducing effect,high safety and low corrosivity.The dust removal rate is about 90.0%,the PM10 dust removal rate is about 83.1%,and the respiratory dust removal rate is about 82.4%.The PM2.5 dust removal rate is about 77.3%,and the PM1 dust removal rate is about 53.5%.