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15 марта 2021 г. 10:34

Advantages of Regenerative Desiccant Type Dryers

Heat regenerative desiccant dryers may have internal or external heat applied by heaters. In the internal type, steam or electricity may be used in heaters embedded in the desiccant bed. This reduces the amount of purge air required for regeneration to less than 10%. The purge air plus normal radiation is used to cool the desiccant bed after regeneration to prevent elevated air temperatures going downstream.

 

In externally heated regenerative air compressor desiccant dryers, the purge air is heated to an elevated temperature and then passes through the desiccant bed. The amount of purge air is approximately 5-10% of the air flow through the dryer. The purge air from the compressed air system can be eliminated if a blower is used for the circulation of heated atmospheric air through the desiccant bed. To protect the desiccant bed from oil contamination from the air compressor, a coalescing filter is required upstream of the dryer. To protect downstream equipment from desiccant dust or fines, a particulate filter downstream of the dryer also is also recommended.

 

Advantages of Regenerative Desiccant Type Dryers include:

Very low dew points can be achieved without potential freeze-up.

Moderate cost of operation for the dew points achieved.

Heatless type can be designed to operate pneumatically for remote, mobile or hazardous locations.

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Автор: Статус: offline miapacky
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