Influence of Water Injection Pressure on Methane Gas Displacement by Coal Seam Water Injection

Figure 1

The two-phase displacement test device. 1: valve; 2: gas cylinder; 3: constant-flux pump; 4: vacuum pump; 5: gas storage tank; 6: pressure gauge; 7: temperature controller; 8: hydraulic oil pump; 9: adsorption tank; 10: hydraulic water pump; 11: water bath tub; 12: gas-liquid separation bottle; 13: gas collection cylinder; 14: pressure control valve; 15: one-way valve.