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* Please start editing this page after the /noinclude | * Please start editing this page after the /noinclude | ||
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[[File:Air_Dryers_1.jpg|thumb|200px|Right|Air Dryers | [[File:Air_Dryers_1.jpg|thumb|200px|Right|Air Dryers]] | ||
[[File:Air_Dryers_2.jpg|thumb|200px|Right|Air Dryers | [[File:Air_Dryers_2.jpg|thumb|200px|Right|Different Parts of Air Dryers]] | ||
'''Air Dryer''' is a device for removing water vapor from compressed air. [[Compressed Air Dryers]] are commonly found in a wide range of industrial and commercial facilities. | |||
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* A regenerative desiccant dryer typically delivers a dew point of between −40 °F(−40 °C) and −100 °F (−73 °C) | * A regenerative desiccant dryer typically delivers a dew point of between −40 °F(−40 °C) and −100 °F (−73 °C) | ||
* A refrigerated dryer delivers a dew point not lower than approximately 35 °F (2 °C) | * A refrigerated dryer delivers a dew point not lower than approximately 35 °F (2 °C) | ||
* A deliquescent dryer delivers a dew point suppression that fluctuates with air temperature. Typically this suppression is 20 °F | * A deliquescent dryer delivers a dew point suppression that fluctuates with air temperature. Typically this suppression is 20 °F below the compressed air temperature. | ||
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==Deliquescent dryer== | ==Deliquescent dryer== | ||
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. | 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. | ||
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==Desiccant dryer== | ==Desiccant dryer== | ||
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]]. | 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]]. | ||
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==Membrane dryer== | ==Membrane dryer== | ||
[[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. | [[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. | 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. | ||
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==Usages== | ==Usages== | ||
* Drying air for use in commercial or industrial processes that demand dry air | * 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 | :*Telecomm industry (pressurizes its underground cables to repel moisture and avoid shorts |