Natural gas purification device

The utility model discloses a natural gas purification device which comprises a gas inlet pipe, a gas valve I, a tank body, a liquid collecting box, a water cooling pipe, a dust collecting box, a gas collecting box and a gas outlet pipe, the first gas valve is opened, natural gas to be treated enters the bottom end of the interior of the tank body through the gas inlet pipe, the gas treated in the first step enters the interlayer for cooling treatment through the first gas vent and makes contact with the water cooling plate so that water vapor can be liquefied when encountering cold, and liquefied liquid can be collected through the liquid discharging pipe and the liquid collecting box; the natural gas treated in the second step enters a third treatment layer through a second vent hole, an arranged activated carbon adsorption layer can adsorb some stable impurities, adsorbed and fallen impurities can be recycled through a dirt suction cover and a draught fan, after treatment is completed, a first air valve is