复配润湿剂提高煤层注水效果的实验研究
Experimental Study on Improving the Effect of Coal Seam Water Injection with Compound Wetting Agent
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摘要: 煤层注水是一项最积极有效的减少煤尘产生的措施。为了提高煤层注水的效果，根据润湿剂的复配原理，选取了5种不同类型的表面活性剂与一种中性无机盐进行复配，得到5种不同组分的润湿剂。采用毛细上法分别测量不同浓度下润湿剂的表面张力，测得5种润湿剂的最低表面张力与临界胶束浓度，经过对比，润湿剂A的综合性能优异。并选取了2个不同地区的煤样，采用HARKE－SPCA接触角测定仪测量纯水和润湿剂A溶液在煤样表面的接触角。实践证明，润湿剂A溶液在煤样表面的接触角比纯水要小得多，能够有效降低纯水的表面张力，提高纯水对煤体的润湿效果。Abstract: Coal seam water injection is one of the most active and effective measures to reduce the coal dust generation. In order to improve the effect of coal seam water injection, according to the principle of compound wetting agent, it selected five different types of surface-active agent and a neutral inorganic salt to compound, and obtained five wetting agents with different components. It used capillary rise method to measure the surface tension of wetting agent under different concentrations, and obtained the lowest surface tension and the critical micelle concentration of five wetting agents. By contrast, the wetting agent A had comprehensive excellent performance. Then it selected coal samples in two different regions, with HARKE-SPCA contact angle measuring instrument, it measured the contact angle of pure water and wetting agent A solution on the surface of coal samples. The practice had proved that the contact angle of wetting agent A solution was much smaller than pure water on the surface of coal samples, it could effectively reduce the surface tension of pure water, and improve wetting effect of pure water on the coal.
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Keywords:
- coal seam water injection /
- dust /
- wetting agent /
- surface tension /
- critical micelle concentration /
- contact angle
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