Low concentration oxygen -containing coal bed gas system CNG's device

The utility model discloses a low concentration oxygen -containing coal bed gas system CNG's device, include along the coal bed gas air current to roots's fan of setting up, slightly deoxidize device, pressure swing adsorption unit, gaseous detection device and CNG collection device, pressure swing adsorption unit includes two sections pressure swing adsorption unit, and first section pressure swing adsorption unit includes compressor and smart deoxidation device in proper order, and second section pressure swing adsorption unit includes compressor and denitrification device in proper order, CNG collection device includes compressor and CNG collection tank in proper order, gaseous detection device's end has two outlet ducts, and an outlet duct is connected with CNG collection device, and another outlet duct is connected with pressure swing adsorption unit. This neotype beneficial effect does: can pass through safe and reliable with low concentration oxygen -containing coal bed gas, the CNG of high -purity is