Device for treating low concentration methane in ventilation air methane (VAM) of coal mine and method thereof
A low-concentration mine technology, applied in mining equipment, combustion methods, lighting and heating equipment, etc., can solve problems such as increased gas utilization, inability to deal with methane, and frequent changes in methane concentration in exhaust air, achieving small pressure loss and low operating costs Reduced effect
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[0027] Example 1
[0028] Applying the method of the present invention to establish a set of processing capacity of 1000m 3 / h of mine exhaust air flow direction conversion catalytic combustion heating device, such as figure 1 Shown. First, open the pneumatic three-way valve V-1 for air supply, and close the gate valve V-2 at the mine gas inlet. The heat exchanger E-1 will not take heat temporarily. Turn on the heating equipment A-1 and B at the top of the catalytic reactor for heating. The power supply of equipment B-1 starts heating; while heating, open the air inlet pneumatic three-way valve V-3, the air outlet pneumatic three-way valve V-5, and close the air inlet pneumatic three-way valve V-4 and the air outlet pneumatic three-way valve V. -6, the air enters the catalytic reactor RA from the air inlet pneumatic three-way valve V-3 and is heated by the heating device A-1, and then enters the heating section B-1 at the top of the catalytic reactor RB to continue heating, so tha...
Example Embodiment
[0030] Example 2:
[0031] The reaction device is as in Example 1. The catalyst and the heat storage filler at both ends are preheated to the catalyst activity temperature of 450°C, and the mine exhaust air flow rate is 1000m. 3 / h, the methane concentration is 0.3%, the reversing period is 540s, the reaction can be performed automatically, and the methane conversion rate reaches more than 95%.
Example Embodiment
[0032] Experimental example 3:
[0033] The reaction device is as in Example 1. The catalyst and the heat storage filler at both ends are preheated to the catalyst activity temperature of 450°C, and the mine exhaust air flow rate is 1000m. 3 / h, the methane concentration is 0.6%, the reversing period is 540s, the methane conversion rate reaches more than 95%, and the heat exchanger can remove part of the heat.
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