Cross-flow adsorption tower and flue gas low-temperature adsorption system

The utility model provides a cross-flow type adsorption tower and a flue gas low-temperature adsorption system, the cross-flow type adsorption tower comprises a tower drum and a cross-flow bed, the tower drum is provided with an adsorption cavity, and a flue gas inlet and a flue gas outlet which are communicated with the adsorption cavity; the cross-flow bed is composed of an adsorbent and located in the adsorption cavity, the cross-flow bed is of a hollow structure, a first flue gas flow channel is formed by a hollow cavity of the cross-flow bed, and a second flue gas flow channel is formed between the peripheral surface of the cross-flow bed and the inner wall surface of the tower drum; flue gas to be adsorbed and purified penetrates through the cross-flow bed from one of the first flue gas flow channel and the second flue gas flow channel in the inside and outside direction and then enters the other one of the first flue gas flow channel and the second flue gas flow channel, and the other one of the first