Desiccant Type Dryer

Desiccant Type Dryer

A Desiccant Type Dryer is an industrial air drying system designed to remove moisture from compressed air, ensuring that it remains dry and free from contaminants. The dryer achieves this by utilizing a desiccant material—typically activated alumina, silica gel, or molecular sieves—that adsorbs water vapor from the air. These dryers are widely used in industries where moisture control is critical to maintaining product quality and preventing equipment corrosion or freezing, such as in the automotive, pharmaceutical, food processing, and electronics sectors.
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Description
Technical Parameters
Key Features and Advantages

 

Effective Moisture Removal: Desiccant dryers are capable of producing extremely dry air with a dew point as low as -40°C to -70°C, which is essential for industries requiring high levels of moisture control.

 

Continuous Operation: The dual-tower system allows one tower to dry the air while the other regenerates, ensuring an uninterrupted supply of dry compressed air.

 

Flexibility: Desiccant dryers are available in various sizes and configurations, making them suitable for a wide range of applications, from small-scale operations to large industrial setups.

 

Energy-Efficient Options: While heated desiccant dryers consume more energy due to the heating element, heatless models offer energy savings by eliminating the need for external heat, though at the cost of sacrificing a small amount of dried air.

 

Protects Equipment and Products: By removing moisture, desiccant dryers prevent corrosion and rust in pneumatic equipment, as well as contamination or spoilage in sensitive manufacturing processes.

 

Compact and Modular Designs: Desiccant dryers are often designed with compact footprints, allowing for easy installation even in space-constrained environments. Modular designs also enable customization based on airflow requirements.

 

Technical Specification

 

Model Capacity Connections Water Dimension mm Weight Recommended
m³/min CFM Air Water Consumption t/h L W H kg After-Filter Model
RSXY-60ZP 6 212 DN50 2" 6.1 2000 900 1900 1000 RSG-AR-0145G/V2
RSXY-80ZP 8 282 DN50 2" 8.2 2000 900 1900 1050 RSG-AR-0145G/V2
RSXY-100ZP 10 353 DN50 2" 10.2 2066 950 1916 1151 RSG-AR-0220G/V2
RSXY-120ZP 12 424 DN50 2" 12.2 2066 1000 2000 1250 RSG-AR-0220G/V2
RSXY-150ZP 15 530 DN65 2" 15.3 2165 1000 2316 1550 RSG-AR-0330G/V2
RSXY-200ZP 20 706 DN65 2" 20.4 2225 1000 2567 1640 RSG-AR-0330G/V2
RSXY-220ZP 22 777 DN65 2" 22.4 2325 1050 2647 1900 RSG-AR-0430G/V2
RSXY-250ZP 25 883 DN65 2" 25.5 2325 1050 2647 1980 RSG-AR-0430G/V2
RSXY-350ZP 35 1236 DN80 2" 35.7 2452 1250 2510 2470 RSG-AR-0620G/V2
RSXY-450ZP 45 1589 DN100 3" 45.9 2900 1400 2690 3000 RSG-AR-0830F/V2
RSXY-600ZP 60 2119 DN100 3" 61.2 3100 1650 2717 3800 RSG-AR-1000F/V2

 

Rated Conditions

Working Range

Avaliable

 The heated regenerative desiccant air dryer

Working pressure : 0.7MPag / 100psig

Max.working pressure : 1.0MPag / 145psig

Higher pressure above 1.0Mpag / 145psig

Inlet temp : 160 ℃ / 320 ℉

Max.inlet temp : 200℃ / 394 ℉

Booster heater

Cooling water temp : 32℃ / 90 ℉

Max.ambient temperature : 40℃ / 104 ℉

Higher capacity

   

Stainless steel vessel or piping

   

GB,ASME,PED,etc. vessels

   

Zero loss drain

 

Correction Factors

 

Actual Capacity (m³/min) = Nominal Capacity × KA × KB

 

Working Pressure (KA) Mpag 0.5 0.6 0.7 0.8 0.9 1
psig 73 87 100 116 131 145
CFP 0.75 0.87 1 1.13 1.25 1.37

 

Cooling Water Temperature (KB) 25 30 32 35
77 86 90 95
CFT 1.33 1.11 1 0.85

 

 

FAQ

 

1. What dew point can a desiccant dryer achieve?
Desiccant dryers can achieve dew points as low as -40°C to -70°C, depending on the model and application. This makes them ideal for industries requiring extremely dry air, such as electronics, pharmaceuticals, and food production.

 

2. What are the main differences between a heatless and heated desiccant dryer?
A heatless desiccant dryer regenerates the desiccant using a portion of the dried compressed air, making it more energy-efficient but with slightly lower efficiency due to air loss. A heated desiccant dryer, on the other hand, uses an external heat source for regeneration, preserving more compressed air but consuming more energy.

 

3. How often should the desiccant be replaced?
The desiccant in a desiccant dryer typically lasts between 3 to 5 years, depending on usage conditions, air quality, and maintenance practices. Regular monitoring and replacement are important to ensure the dryer's effectiveness and efficiency.

 

4. Is a desiccant dryer suitable for high-flow compressed air systems?
Yes, desiccant dryers come in a range of capacities to suit both low-flow and high-flow systems. Larger models with high air throughput are available for industrial environments requiring significant amounts of dry compressed air.

 

5. What is the energy consumption of a desiccant dryer?
The energy consumption of a desiccant dryer depends on the type. Heatless dryers are generally more energy-efficient as they don't require external heat, but they use a portion of the dried air for regeneration. Heated dryers use more energy due to the heating element, but they are more efficient in terms of air preservation.

 

6. What maintenance is required for a desiccant dryer?
Regular maintenance includes inspecting and replacing the desiccant every 3 to 5 years, checking and cleaning the air filters, and ensuring that the valves and seals are functioning properly. Regular monitoring of dew points is also essential to ensure optimal performance.

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