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Difference between revisions of "Desiccant Dryers"
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The '''Desiccant Dryers''' are used for drying air in | The '''Desiccant Dryers''' are used for drying air in [[Storage Tanks]] or pneumatic systems and are beneficial in the drying of hygroscopic (water-absorbing) resins. These [[Dryers]] remove water from the air by passing it through a desiccant that absorbs moisture. | ||
==Features== | ==Features== | ||
Desiccant dryers consist mainly of two cylinders containing desiccant, connected by a valve system. | |||
==Operation== | ==Operation== | ||
When the desiccant in the first cylinder is saturated, the air flow can be switched to the cylinder containing the dried desiccant. | |||
==Dessicant Types== | ==Dessicant Types== | ||
Common desiccants are silica gel (an oxide of silica), alumina (aluminum oxide) and calcium sulfate (the anhydrous form of gypsum). | |||
==Types of Dryers== | ==Types of Dryers== | ||
While manual desiccant dryers exist, many dryers are [[Regenerative Desiccant Dryers]]. | |||
==Most Expensive== | ==Most Expensive== | ||
Heatless regenerative desiccant dryers run a portion of dried compressed air through the previously utilized cylinder to extract moisture from its desiccant. | |||
==Least Expensive== | ==Least Expensive== | ||
Heated purge regenerative desiccant air dryers use less air than the heatless variety in addition to heat, which helps the air carry away more water as it passes through the saturated desiccant. | |||
==Best Compromise== | ==Best Compromise== | ||
Heated blower purge regenerative desiccant air dryers use air from outside the dryer that is heated and sent through the water-saturated desiccant for drying. | |||
==Classification== | ==Classification== | ||
There are different types of regenerative desiccant compressed air dryers. These are: | There are different types of regenerative desiccant compressed air dryers. These are: | ||