Air Dryer (Deliquescent VS Refrigerant )

1.Air Dryer,desiccant air dryer, refrigerated, Absorption air dryer
2.20years experience
3.CE
4.screw air compressor dryer
Air Dryer,delisccant air dryer, refrigerated, Absorption air dryer

3BASIC TYPS
Deliquescent
Refrigerant
Regenerative
HOW DRYER REMOVES MOISTURE
Chamical Absorption. Desiccant absorbs moisture and dissolve slowly.Desiccantis not regenerated.
Heat Transfer cools air to condense moisture
Chamical Adsorptive,Desiccant attracts&holds moisture on surface unit regenerated.
Operating principles
Air enters lower central area of vessel where larger droplets and solid particles are separated mechanically.As the desiccant bed,moisture is adsorbed by the tablets.The water and dissolevd desiccant drop to the claim area,which can be drainde manually or automatically
Entering air is pre-cooled in first heat exchanger before entering the second for final cooling.Heat from the air is transferred to the cool refrigerant.Condensed moisture is trapped and discharged through an auto drain
One tower receives wet air,which flows through desuccant bed,and the moisture collects on the desiccant.Simultaneously,desiccant in other tower is being regeneated.Collected moisture is driven off by electric or steam heat and/or a perge of dry air from operating tower.
Desiccant Required
Desiccant tablet
None
Activated Alumina&Molecular Sieve
Energy Required to operate
None
Electric (all models). water for watercooled condensers where specified
Electric(all models)plus power for regeneration electric or stem heat or compressed air purge
Environmentol problem
None
Exhaust gas pollution of cool coal
Rest of active carbon,pollution
pressure Dew Point(at7kgf/c)
8
(The yearly mean)
4-10
-40-80
Oil Removal Ability
Will remove some larger liquid-phase oil particles
Will condense some oil droplets during cooling process.
None
Pressure Drop
Less than 1% of operating pressure
5-8%
10-15%
Inlet Air Temp-MAX
-MIN
38
No minimum
38
4
38
4
Location
Indoors or out doors
Indoors
Indoors or out doors
PRE FILTER REQUIRED
Recommended where heavy amounts of oil are present to prevent coating of desiccant tablets
Recommended.prevents fouling of heat exchangers.
Yes.Prevents oil and liquid water from damaging or overloading desiccant bed.
AFTER FILTER REQUIRED
Yes.To prevent particle migration from desiccant in case of system upset
Recommended for critical applications.
Yes.To prevent particle migration from desiccant.
Maintenance
Drain condensate once per shift-either manually or with motorized drain
Blow dust from condenser fins regularly.check and clean auto drain.
Replace desiccant every 1 to 2 years.Adjust controls.Clean or re place filter elements.
Repair Requirements
None
No moving parts to repair
Requires qualified service personnel.
Requires qualified service personnel
Comp economical efficiency and function of product
Comparing Air Dryer:Heatless Regenerative and External Heater Regenerative,it will save expenses without air consumed
Regular maintain;outlet of pollution;the air will be consumed about 8-10%
Ative alumina replaced by every year;expenses increased;air consumption will be more.