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中文摘要：
煤岩吸附解吸性能评价对煤层气的开发十分重要。利用自行设计的煤岩吸附解吸性能评价装置,进行了CH4、CO2、N2等在煤岩中的吸附解吸性能评价。在此基础上,研究了不同参数超声波处理对煤层气解吸效果的影响,分析了超声波促进煤层气解吸的机理。研究表明,煤岩中的气体主要以吸附态和自由态存在,煤岩对不同气体吸附量从大到小依次为CO2、CH4、N2。经超声波处理后,煤层气的解吸速度可提高70%,同时煤层气的解吸量增加。解吸量增加幅度与超声波处理参数有关,随处理功率的增大,解吸量增加,增加幅度可达20%。分析认为超声波的＂剥离＂作用是超声波提高煤层气解吸效果的机理之一。
英文摘要：
Coal adsorption and desorption performance evaluation is very important for the development of coalbed methane.A new device for coal adsorption and desorption performance evaluation was designed,based on which,performance evaluation of different gases,such as CH4,CO2 and N2 was carried out.On this basis,the effect of ultrasonic stimulation parameters on desorption of coalbed methane was studied,and desorption mechanism of ultrasonic stimulation was analyzed.Results show that the gases in coal and rock present mainly in both adsorbed and free states,the adsorption capacity for different coal gases is different,its descending order is CO2,CH4,N2.Compared with conventional desorption process,through ultrasonic treatment,the desorption rate of coalbed methane can be increased up to 70% and the desorption volume increases about 20%.The increase of desorption due to ultrasonic stimulation is related to the ultrasonic parameters.Higher the ultrasonic power is,the greater the desorption volume.The＂Peel＂effect of ultrasound is one of the mechanism of improvement of coalbed methane desorption.
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