Low-temperature absorbent device for cryogenic pressure vessel

The utility model discloses a low-temperature absorbent device for a cryogenic pressure vessel. The cryogenic pressure vessel comprises an inner vessel and an outer vessel, wherein a technological manhole is formed in the lower middle part of a sealing head of the inner vessel; a feeding opening is formed in a sealing head of the outer vessel in a position corresponding to the technological manhole. The low-temperature absorbent device comprises an absorbent cylinder body, wherein the absorbent cylinder body comprises an upper cylinder body segment and a lower cylinder body segment, which has the same internal diameter and different external diameters, wherein a cylinder body sealing head is smoothly welded at the open end part of the upper cylinder body segment; a screen plate device is welded on the inner side of the open end part of the lower cylinder body segment; and the outer side of the open end part of the lower cylinder body segment is welded on the technological manhole. According to the low-temperature absorbent device, the efficacy elaboration of a low-temperature absorbent is increased and improved by enlarging a through-flow area; through a structural improvement, the structural stress condition is improved, potential welding quality hazards are eliminated, and the safety of the pressure vessel is increased; and through a position layout improvement, the operation condition is improved and the labor intensity is alleviated.