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Procedure to maintain dew point specification of a compressed air dryer Disclosure Number: IPCOM000211846D
Publication Date: 2011-Oct-20
Document File: 1 page(s) / 21K

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Disclosed is a procedure to maintain the dew point specifications when a compressed air dryer starts.

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This is the abbreviated version, containing approximately 99% of the total text.

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Procedure to maintain dew point specification of a compressed air dryer

A certain procedure allows control of the humidity rate (i.e., dew point) in the compressed air. The dew point represents the temperature at which the water condenses. The dew point measurement is critical in the compressed air domain. It is important to be aware of the dew point in order to control the air quality provided at the air compressor outlet and to avoid some problems caused by the corrosion and/or frost in the compressed air system. The established specifications must be respected.

When an air compressor starts, especially on humid days, it is difficult to maintain an efficient dew point. After investigation, it has been noticed that an adsorption air dryer, for example, is not completely dry when it is stopped. When the compressor is getting started, the water particles remaining inside the adsorption air dryer are blended with
the compressed air, causing the measured humidity rate and the dew point to increase.

The disclosed solution is as follows:

When the air compressor stops, the adsorption air dryer drum is kept turning, and the manipulation of some valves allows the dry air from the compressed air distribution network to return in the dryer. This manipulation enables the air to eliminate the residual water particles in the dryer. When the air compressor starts again, the adsorption air dryer is dry, so there are no water particles in the distribution network so the right de...