Digestion tank applied to digestion of burning incense products

The invention relates to the field of incense burning, in particular to a digestion tank applied to digestion of incense burning products, the digestion tank comprises an outer tank and an inner tank nested in the outer tank, the opening of the outer tank extends outwards to be provided with an outer flange, the opening of the inner tank extends outwards to be provided with an inner flange, the inner flange is arranged on the upper end face of the outer flange, and the outer flange is arranged on the upper end face of the inner flange. An outer sealing groove is formed in the upper end face of the outer flange, an inner sealing groove is formed in the lower end face of the inner flange, a flange sealing ring is arranged between the outer sealing groove and the inner sealing groove in a clamped mode, a plug body is arranged at an opening of the inner tank, a plug flange is arranged on the plug body, and plug sealing gaskets are arranged on the upper end face and the lower end face of the plug flange respective