油水乳液强化分离矿井瓦斯的特性

为探究油水乳液体系瓦斯水合物分离特征,利用高压可视搅拌水合分离实验装置结合气相色谱仪,研究了2℃条件下油水体积比、驱动力对瓦斯水合物生长速率和CH4回收率的影响,计算了气体消耗量、水合物体积生成量、水的转化率。结果表明:油水乳液体系水合物浆液具有良好的流动性;相同温度压力条件下,油水体积比1∶1体系瓦斯水合物平均生长速率和CH4回收率均优于7∶3体系,但水合物浆液流动性不及7∶3体系;瓦斯水合物平均生长速率、气体消耗量、水合物体积生成量、水的转化率均随着驱动力的增大而增大;油水体积比1∶1条件下CH4回收率和分离因子随着驱动力的增大而先增大后减小,驱动力为3.0 MPa(压力为7.78 MPa)时CH4回收率最大为24.36%。

Characteristics of enhanced separation of mine gas with oil-water emulsion

In order to investigate the separation characteristics of gas hydrate in oil-water emulsion system，this paper studied the influence of oil-water volume ratios and driving forces on the growth rate and CH4 recovery of gas hydrate under the condition of 2 ℃ by the high pressure stir visual hydrate separation experiment combined with the gas chromatograph，and calculated the gas consumption，hydrate generation volume，the conversion rate of water.The results show that the hydrate slurry has a good liquidity in oil-water emulsion system.The average growth rate of gas hydrate and the CH4 recovery in the oil-water volume ratio 1∶1 system are better than the 7∶3 system under the conditions of same temperature and pressure，but the hydrate slurry liquidity is much better with the 7∶3 system.The average growth rate，gas consumption，hydrate generation volume and the conversion rate of water increase with driving force.In the system of oil-water volume ratio 1∶1，the CH4 recovery and separation factor increase at the beginning and then decrease with the increase of driving force，the biggest CH4 recovery is 24.36% when the driving force is at 3.0 MPa (the pressure is 7.78 MPa).