Liquid carbon dioxide spraying type pressure-variable temperature-control adsorption tower

Abstract

The invention relates to the technical field of gas treatment, and discloses a liquid carbon dioxide spraying type pressure-variable temperature-control adsorption tower which comprises a tower body,a pressure control subsystem, a spraying subsystem and an adsorption subsystem; the adsorption subsystem comprises adsorption beds and adsorption bed fixing plates; the adsorption beds are distributedin the tower body at intervals in the vertical direction, and the two ends of each adsorption bed are fixedly connected with the tower body through the adsorption bed fixing plates; the spraying subsystem comprises a spraying header pipe, spraying branch pipes and spraying pipes; and the spraying header pipe is fixed in the tower body, the spraying branch pipes are distributed in an annular areaof the spraying header pipe in parallel at equal intervals, the spraying pipes are arranged in the vertical direction, one ends of the spraying pipes communicate with the spraying header pipe or the spraying branch pipes, and inner cavities of the spraying header pipe and the tower body are connected with the pressure control subsystem. The adsorption tower has the beneficial effects that the adsorption beds are cooled while mixed gas is adsorbed and purified, so that the temperature of an adsorbent is reduced, the service life of the adsorbent is prolonged, and the cooling amplitude of the adsorption beds can be controlled by adjusting the evaporation pressure of carbon dioxide in the tower.

Description

technical field [0001] The invention relates to the technical field of gas treatment, in particular to a liquid carbon dioxide spray type pressure-variable-temperature-controlled adsorption tower. Background technique [0002] Pressure swing adsorption technology is a new gas separation technology that has emerged in the industry in recent years. It mainly uses the difference in the adsorption characteristics of gas components on solid adsorbents and the characteristics of the adsorption capacity changing with pressure, and realizes the separation or separation of gases by changing the pressure. Purification, so the regeneration speed is fast and the energy consumption is low. It is an energy-saving gas separation technology. [0003] The key to pressure swing adsorption is physical adsorption. Physical adsorption is mainly caused by the interaction between adsorbate and adsorbent molecules. There is no chemical reaction in this process. The adsorption process unfolds very ...

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Problems solved by technology

[0005] At present, among the PSA purification devices that have been practically used, most of them are to cool down the gas to be adsorbed in advance, and the temperature of the adsorbent caused by the heat release during the adsorption process increases, resulting in a smaller adsorption capacity and poor adsorption capacity. The phenomenon of poor effect is lack of corresponding effective measures to control it, so the final effect is not ideal

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