Device and method for treating volatile organic compound gas

The invention belongs to the technical field of waste gas treatment, and particularly relates to a volatile organic compound gas stage treatment device which comprises an adsorption container. An adsorption chamber of the adsorption container comprises two adsorption areas, namely an adsorption area A filled with a large mesoporous adsorbent A and an adsorption area B filled with a small mesoporous adsorbent B; in the large mesoporous adsorbent A, mesopores of 3-10 nm account for more than 80-95% of the total pore volume; the aperture of the small mesoporous adsorbent B is less than 3nm; an air hole A is formed in the wall of the adsorption area A; and an air hole B is formed in the wall of the adsorption area B. In addition, the invention also relates to a method for adsorbing and desorbing the waste gas by using the equipment. According to the method for adsorbing through the device, organic matters in the waste gas can be effectively removed, and the waste gas treatment effect is improved. The system and t