Circulating drying machine for compressed air

Abstract

The invention belongs to the technical field of air drying, and discloses a circulating drying machine for compressed air. The circulating drying machine comprises a fixed box and a circulating air pipe; a middle partition plate is fixedly mounted in the middle of an inner cavity of the fixed box. Through an adsorption device, the compressed air enters the fixed box from a compressed air inlet and sequentially penetrates through a movable baffle and an inner box to meet an adsorbent; the adsorbent adsorbs moisture contained in the compressed air, and meanwhile the compressed air pushes the adsorption device upwards to enable the adsorption device to rotate clockwise; the adsorbent can be circularly and uniformly used, a part of the adsorbent is prevented from being in continuous contact with compressed air with high water content and being overused, the service life of the adsorbent is prolonged; and in the rotation process of the adsorption device, due to the fact that the adsorbent is heated and dried after adsorbing the water in the continuous operation process, the maximum dryness can be continuously kept, the moisture adsorption efficiency is improved, and the dryness of the compressed air is enhanced.

Description

technical field [0001] The invention relates to the technical field of gas drying, in particular to a circulation drying machine for compressed air. Background technique [0002] There is a certain amount of gaseous water in the atmosphere, and affected by factors such as seasons, geographical locations, and climatic conditions, the content of gaseous water is changing all the time. At the same time, compressed air, as an important power source next to electricity, has been It is widely used in petrochemical, metallurgy, national defense and other industries. Air compression and use need to be dried. When the water content value exceeds the maximum limit that the production process can bear, a series of problems will appear. The implementation efficiency of the production process has a serious impact. Most of the existing drying technologies use adsorption drying technology to dry compressed air, such as adsorption dryers, but there are some shortcomings in the use process, ...

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Problems solved by technology

[0003] First, the structure of the adsorption dryer is a double-tower type. The compressed air first flows through the adsorbent bed from the bottom to the top of the drying tower A, and the dried air is discharged from the upper pipe system. A small amount of dried air (about 7%- 12%) is decompressed through the regeneration gas regulating valve of the upper piping system and enters the heater for heating. This part of hot air (called regeneration gas) enters the drying tank B from top to bottom, and decomposes and regenerates the adsorbent in the drying tank B. To restore the drying capacity of the adsorbent, the two are used alternately, so that the adsorbent in the middle and lower parts of the two tanks is first in contact with the compressed air with a large water content and dried, causing the adsorbent in the middle and lower part to reach the moisture absorption limit first , loses its effect. Similarly, the regeneration gas first dries the middle and upper adsorbents from top to bottom. When the regeneration gas reaches the bottom, it already contains a certain amount of water, which cannot make the middle and lower adsorbents recover quickly, which greatly prolongs the drying process. At the same time, the compressed air after drying is greatly wasted, resulting in a waste of energy

[0004] Second, the adsorbent in the drying tank has different degrees of failure due to different degrees of moisture absorption. In order to ensure the drying quality of the compressed air, once more than one-third of the adsorbent fails or after a certain period of use, the drying tank needs to be replaced. Recovery greatly affects work efficiency. At the same time, in the long-term use process, some adsorbents are completely invalid, and all adsorbents need to be replaced, resulting in waste of cost.

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