Working Principle
The heated regenerative desiccant air dryer operates on the principle of adsorption and regeneration. It typically consists of two main desiccant towers, each filled with a desiccant material such as silica gel, activated alumina, or molecular sieve.
Drying Phase: Compressed air enters one of the desiccant towers, where it passes through the desiccant material. The desiccant adsorbs moisture from the air, producing dry air that exits the tower and is directed to the application point.
Regeneration Phase: While one tower is in the drying phase, the other tower undergoes regeneration. Heated air is used to purge the moisture adsorbed by the desiccant material. This heated air, usually generated by electric or gas heaters, raises the temperature of the desiccant bed to desorb the moisture, which is then expelled from the system. The heated regeneration process helps to quickly and efficiently restore the desiccant's moisture-adsorbing capacity.
Cycle Control: The system alternates between drying and regeneration phases using a control system that manages the timing and temperature of the regeneration process. This ensures continuous operation and consistent air quality.
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 |
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Rated Conditions |
Working Range |
Avaliable |
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Working pressure : 0.7MPag / 100psig |
Max.working pressure : 1.0MPag / 145psig |
Higher pressure above 1.0Mpag / 145psig |
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Inlet temp : 160 ℃ / 320 ℉ |
Max.inlet temp : 200℃ / 394 ℉ |
Booster heater |
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Cooling water temp : 32℃ / 90 ℉ |
Max.ambient temperature : 40℃ / 104 ℉ |
Higher capacity |
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Stainless steel vessel or piping |
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GB,ASME,PED,etc. vessels |
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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.How does the drying phase of a heated regenerative desiccant air dryer work?
In the drying phase, compressed air enters one of the desiccant towers and passes through the desiccant material, such as silica gel, activated alumina, or molecular sieve. The desiccant adsorbs moisture from the air, producing dry air that exits the tower and is directed to the application point, ensuring high-quality air with low moisture content.
2.What is the function of the regeneration phase in a heated regenerative desiccant air dryer?
During the regeneration phase, heated air, typically produced by electric or gas heaters, is used to purge the moisture from the desiccant in the second tower. The heated air raises the temperature of the desiccant, allowing it to release the trapped moisture, which is expelled from the system, making the desiccant ready for reuse.
3.Why are two desiccant towers used in heated regenerative desiccant air dryers?
The two towers enable continuous operation, with one tower drying the air while the other undergoes regeneration. This design allows for efficient moisture removal and uninterrupted air supply, ensuring that the system can consistently provide high-quality dry air.
4.How does the control system in a heated regenerative desiccant air dryer enhance its operation?
The control system manages the timing and temperature of the drying and regeneration phases. It alternates between towers to ensure continuous air drying, optimizes energy use during regeneration, and maintains consistent air quality by preventing moisture from re-entering the system.
5.What are the benefits of using heated air for regeneration in a desiccant air dryer?
Using heated air for regeneration improves the efficiency of moisture desorption from the desiccant material, ensuring a faster and more complete regeneration process. This leads to more reliable performance, extended desiccant life, and reduced energy consumption compared to non-heated regeneration methods.
