Dryer With Controls On Bottom – Heatless Dryers get rid of water vapor from compressed air by means of a process is called Pressure Swing Adsorption. Pressure dew points generally ranging from -40O F to -100O F are attained by directing the flow of soaked compressed air more than a bed of desiccant. The most typically employed desiccant is activated alumina, spherical shaped, hygroscopic material chosen for its dependable size, shape and intense surface to mass ratio.
This physically rough and chemically inert material is enclosed in two separate but identical pressure vessels usually referred to as dual or twin towers. As the soaked compressed air flows up via the on line tower, its moisture content adheres to the face of the desiccant. The dry compressed air is discharged following that from the compartment into the distribution system.
A solid state controller routinely cycles the flow of compressed air in between the towers, even though the on line tower is drying, the off line tower is regenerate. Regeneration, often referred to it as purging, is the approach by which moisture accumulate during the on line cycle is uncovered away during the off line cycle. As low stress dry purge air flows smoothly through the regenerating bed, it’s attracts the moisture that had accumulated on the surface of the desiccant all through the drying cycle and exhausts it to the atmosphere.
To save from harm the desiccant bed from excess liquid, all heatless dryers are planned to perform with the organic pull of gravity. By directing the soaked air into the underside of the on line tower and flowing up through the bed, liquid condensate cause by system upset, is set aside away from the desiccant and leftovers at the bottom of the tower exactly where it can be without having difficulty exhausted in the course of the regeneration cycle.
Counter flow purging guarantees ideal functionality by keeping the driest desiccant at the release end of the dryer.
Moisture weight, velocity, cycle time and contact time decide tower size and the quantity of desiccant. To make positive design dew point, every single tower is cautiously sized to enable a minimum of 5.five seconds of make contact with. To steer clear of desiccant dusting and bed fluidization, air flow velocities are set aside below 50 feet per minute. The dryer can cycle for years without having altering the desiccant.
Heatless dryers in common are the most dependable and least luxurious of all desiccant sort dryers. Heatless Air Dryer is the most power effectively-organized thanks to standard characteristics are like, Variable Cycle Manage and Cycle Loc, and Prop urge.