Difference between revisions of "Air Dryers"

A deliquescent dryer typically consists of a pressure vessel filled  with a hygroscopic media that absorbs water vapor. The media gradually  dissolves—or deliquesces—to form a solution at the base of the pressure  vessel. The liquid must be regularly drained from the vessel and new  media must be added. The media is usually in tablet or briquette form.

The term  [[Desiccant Dryers]] refers to a broad class of dryers. Other  terms commonly used are regenerative dryer and twin tower dryer, and to a  lesser extent [[Absorption Dryers]].

[[Membrane Dryers]] refer to a dehumidification membrane that removes water vapor from compressed air. Typically, the compressed air is first filtered with a high-quality [[Coalescing Filters|Coalescing Filter]]. This filter removes liquid water, oil and particulate from the  compressed air. The water vapor–laden air then passes through the center  bore of hollow fibers in the membrane bundle. At the same time, a small  portion of the dry air product is redirected along the outside surface  of the fibers to sweep out the water vapor which has permeated the  membrane. The moisture-laden sweep gas is then vented to the atmosphere,  and clean, dry air is supplied to the application. The membrane air  dryers are designed to operate continuously, 24 hours per day, 7 days  per week. Membrane air dryers are quiet, reliable and require no  electricity to operate.

Some dryers are non-porous, which means they only permeate water  vapor. Non-porous membranes' drying power is only a function of flow  rate, pressure. The sweep flow is strictly controlled by an orifice and  is not a function of temperature.

* Drying air for use in commercial or industrial processes that demand dry air

:*Telecomm industry (pressurizes its underground cables to repel moisture and avoid shorts