Dryer

Abstract

The invention discloses a dryer, which comprises an outer barrel, an inner barrel and a cooling coil, wherein the outer barrel is used for placing a drying agent; the inner barrel is arranged in and communicated with the outer barrel; and the cooling coil is arranged between the outer barrel and the inner barrel. Circulating cooling water used for cooling the drying agent is introduced in the cooling coil. When the dryer enters a cooling stage after regenerative heating is finished, the cooling coil fast carries heat produced by the regenerative heating of the drying agent away through the cooling water, so the cooling rate of a drying agent bed is twice higher than that of a conventional structure, and a regeneration nitrogen source can be saved by over 70 percent. When the dryer works, the absorption heat produced by the water absorption of the drying agent can be carried away through the circulating water by the cooling coil to avoid the temperature rise of the bed of a molecular sieve caused by the absorption heat produced by the water absorption, thereby ensuring the absorption capacity and absorption depth of the molecular sieve. Compared with the prior art in which the absorption depth and the absorption capacity are increased by increasing the filling volume of the molecular sieve to carry the absorption heat of the dryer away, the dryer greatly reduces the cost.

Description

technical field [0001] The invention relates to a drier used for absorbing moisture in mixed gas in gas production. Background technique [0002] When the traditional dryer is in working condition, the mixed gas enters through the air inlet, and the moisture in the mixed gas is absorbed by the desiccant in the outer cylinder. Since the filled molecular sieve or alumina will generate adsorption heat when absorbing water at normal temperature, the temperature of the desiccant adsorption bed in the outer cylinder of the dryer will automatically rise, resulting in the adsorption water capacity of molecular sieve or alumina desiccant will decrease. Significantly decreased, and the adsorption depth became worse. [0003] Since molecular sieves are adsorbed at normal temperature, the higher the temperature of the adsorption bed, the worse the adsorption depth and the smaller the adsorption capacity. When the dryer is in the regeneration stage, the regeneration gas passes through ...

AI Technical Summary

Problems solved by technology

After the dryer is regenerated and heated, it enters the cooling stage. In the traditional structure, only the regeneration gas is used to cool down the desiccant bed. The cooling effect is not ideal and the cooling time is long, which requires a large amount of regeneration gas.

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