Mathematical Model of Maximum Commutation Half Cycle for Thermal Countercurrent Oxidation of Low-Concentration Gas in Coal Mine Ventilation

Figure 4

Experimental system for thermal countercurrent oxidation of low-concentration gas in coal mine ventilation (1: air compressor; 2: methane cylinder; 3: regulating valve; 4: pressure reducing valve; 5: one-way valve; 6: flame arrester; 7: rotor flow meter; 8: mixer; 9: intake main valve; 10: intake sampling valve (usually closed); 11: solenoid valve; 12: time relay; 13: device main body; 14: cooler; 15: thermocouple; 16: collection card; 17: computer; 18: exhaust gas sampling valve (usually closed); 19: gas chromatograph; 20: draft fan).