Organic waste gas purification device

The utility model provides an organic waste gas purification device which comprises a static pressure filtering device, a photocatalytic purification tower, an adsorption device, a circulating photocatalytic device and an exhaust chimney, the adsorption device comprises at least two resin adsorption tanks which are arranged in parallel; waste gas inlets and waste gas outlets of the resin adsorption tanks are respectively connected to a gas outlet of the photocatalytic purification tower and an exhaust chimney through pipelines; the circulating photocatalytic device comprises a heat exchange system, a photocatalytic desorption tower and a desorption fan, the heat exchange system is used for carrying out cold and heat exchange on the resin adsorption tank, the resin adsorption tank is further provided with a circulating gas inlet and a circulating gas outlet, and the desorption fan is arranged between a gas outlet of the photocatalytic desorption tower and the circulating gas inlet. And the circulating gas outl