Waste gas purification environmental-protection device

The utility model discloses a waste gas purification environmental-protection device. The waste gas purification environmental-protection device is composed of a gas inlet, a gas outlet and a filtering layer, wherein the gas inlet is provided with three layers of metal screen frame active carbon filter screens; a dust removing chamber is internally provided with a plurality of dust baffles; a spray nozzle is arranged at the top of the dust removing chamber and is connected with a water tank through a guide pipe; the guide pipe is provided with a water valve capable of adjusting water amount; a heat exchanger is connected with the dust removing chamber; a heater is connected with the heat exchanger through a connecting pipe and is connected with a catalytic chamber; the catalytic chamber is internally provided with a catalytic combustion reactor and is connected with a purification chamber through a connecting rod; the purification chamber is internally provided with an active carbon adsorption layer and a qua