Influence of Gas from Long-Flame Coal Spontaneous Combustion on Gas Explosion Limit

Figure 3

Temperature-programmed experimental device: 1-gas compression bottle; 2-pressure reducing valve; 3-flowmeter;4-gas preheating tube; 5-intake pipe; 6-reactor;7-thermal insulation layer; 8-coal sample oxidation chamber; 9-thermometer;10-exhaust pipe; 11-temperature acquisition system; 12-gas collector; 13-gas chromatograph; 14-computer.