1results about How to "Prevent explosion accidents" patented technology

A device and method for testing the explosion limits of low-concentration methane gas extracted at high temperatures based on combustion and explosion pressure, belonging to the field of coal mine safety, is described. The device includes a high-temperature heating chamber, a pressure measurement system, a gas supply system, and a vacuum extraction system. The pressure measurement system is installed at the upper opening of the high-temperature heating chamber and uses a cooling component and a heat insulation component in conjunction with a water-cooled pressure sensor to measure the combustion and explosion pressure of low-concentration methane gas extracted at high temperatures through combustion and explosion. The gas supply system uses a solenoid valve to control a high-pressure mixing tank and injects the mixed gas into the high-temperature heating chamber through a multi-channel compressed gas nozzle from the lower opening. The side opening of the high-temperature heating chamber is sequentially connected to the cooling coil, water-cooled jacket, and vacuum pump of the vacuum extraction system. This device solves the problem of vacuum extraction under high-temperature conditions, enabling repeated measurement of the pressure evolution curve of extracted methane gas from oxidation reaction to combustion and explosion under high-temperature conditions, and accurately obtaining the explosion limits of low-concentration methane gas extracted from coal mines within the range of room temperature to 1200℃.