This zero air loss blower purge desiccant desiccant dryer system includes several parts. That is two towers, a blower, an electric heater, and a cooler system. In addition, there are also switching valve and control systems, etc. Welcome to inquire about our regenerative desiccant air dryer.
Firstly, the blower draws in ambient air. Then the heater heats the air. So, they will heat the adsorbent to desorb moisture. During cooling, the hot air circulates through the cooler and regeneration tower. It performs a continuous closed cycle. The regeneration tower is cooled and desorbed. The entire regeneration process does not consume compressed air. Therefore, compared with a heatless dryer, it can save more than 70% of energy.
Technical Parameters of Zero Air-loss Regenerative Desiccant Air Dryer
| Machine name | zero air consumption blower purge desiccant dryer system |
| Dryer inlet air capacity | Std. 37.0Nm3 / min | 2220Nm3 / Hr |
| Working principle | TSA temperature swing adsorption + closed cycle regeneration of blower |
| Working period (single tower) | ≈240 min | Max.360 min |
| Regeneration air loss | 0% |
| Inlet air pressure | Std.7 bar | Min. 6 bar, Max.10 bar |
| Air pressure loss | ≤3% of inlet pressure |
| Inlet air oil requirements | Oil-free compressed air or ≤0.1ppm (mg/m3) |
| Inlet air temperature | Std.10～30℃ | Min.2℃ Max.38℃ |
| Outlet dew point | ≤-40℃ Ensure100% |
| Ambient temperature | Min.2℃ Max.40℃ |
| Regenerative air dryer power | 32KW |
| Blower power | 7.5KW |
| Heater power | 24KW |
| Heating time | ≈120min, average loading 70% |
| Heating temperature | Upper limit: 190°C, lower limit 170°C |
| Cooling water volume | ≤5.4t/h |
| Cooling water pressure | 0.2~0.6MPa |
| Cooling water temperature | ≤32℃ |
| Adsorption dryer weight | 2180Kg |
| Regenerative desiccant dryer size | 2805 H×2100 W×1800 D |
Why Choose Our Desiccant Air Dryer
(1) Highly Energy Efficient
The regenerative air desiccant dryer has a blower. It can pump ambient air for heating regeneration. So it doesn’t consume the compressed air. Below, we will take an example. Then, compare the running costs of different regenerative desiccant dryers. For example, there is a 228m3/min oil-free centrifugal air compressor. Its power is about 1225KW. The air compressor works 365 days a year. Continuous working 24 hours a day. The electricity price is CNY1.1/kWh. And the cost of water is CNY0.25/ton.
| No. | Compressed Air Dryer | Energy consumption calculation of | Annual operating cost | Energy saving ratio |
| each air compressor dryer | compared with heatless dryer | |||
| 1 | Heatless regenerative air dryer | All energy consumption is regeneration air. | CNY1770615 | High energy consumption |
| It accounts for about 15% of the air capacity. | ||||
| (1225KW×15%)×24h×365d×CNY1.1=CNY1770615/year | ||||
| 2 | Heated regenerative desiccant dryer | The cycle of a single adsorption tower is 4h. | CNY1015995 | 42.60% |
| The regeneration air volume is 8%. In addition, | ||||
| the power of the dryer heater is 70KW. The heating time | ||||
| is 1.5h. The cooling time was 2.0h. | ||||
| (1225KW×8%×3.5h+70KW×1.5h×75%)×6 times×365d× | ||||
| CNY1.1=CNY1015995/year. | ||||
| 3 | Micro air consumption | The cycle of single desiccant tower is 4h. The regeneration | CNY588819 | 66.70% |
| blower purge adsorption dryer | air volume is 5%. Regeneration time (cooling) is 2.0 h. Dryer | |||
| heater power is 110KW. Heating time is 1.5h. Additionally, | ||||
| the blower power is 18KW. Blower starting time is 1.6h. | ||||
| (1225KW×5%×1.5h+110KW×1.5h×75%+18KW×1.6h)×6 times× | ||||
| 365d×CNY1.1=CNY588819/year | ||||
| 4 | Zero air loss blower purge | The adsorption period is 4h. And regeneration air volume | CNY449880 | 74.50% |
| desiccant dryer system | is 0%. The heating time is 1.5 h. And heater power of | |||
| regenerative air dryer is 110KW. Cold purge time is 2.0 h. | ||||
| The blower power is 18 KW. The blower start time is 3.5h. | ||||
| (110KW×1.5h×75%+18KW×3.5h)×6 times×365d×CNY1.1= | ||||
| CNY449880/year |
(2) TSE Dew Point Energy Saving Control Function
TSE uses the actual outlet dew point for dynamic control. It detects the saturation of the in-line tower in real-time. If it does not reach saturation, it will extend the adsorption cycle. This ensures a stable dry dew point. Moreover, it maximizes energy savings in regeneration. It can save more than 30% compared to a desiccant dryer system without TSE.
(3) EBZ200-2 Multi-core Drive Intelligent Control System
PLC intelligently controls the system. Besides, it’s with a human-machine interface touchscreen display. Its design level is ahead of the entire air compressor dryer industry.
Besides, the desiccant dryer system has a multi-core drive mode. It can intelligently detect according to the actual conditions. At the same time, it can automatically adjust the optimal operating efficiency of the dryer. Ensure that the regeneration is truly complete. So, the dew point is more stable.
In addition, it can extend the adsorption cycle automatically according to the load. Therefore, it saves significant energy consumption. Compared to the traditional single-core control mode, energy saving can reach more than 20%.
(4) High-quality Raw Materials And Spare Parts
Our regenerative air dryer uses high-quality desiccant beads. For example, 700KG activated alumina and 300KG molecular sieves are in this 37m³/min dyer. The high-pressure blower is a Taiwanese brand. It can ensure reliable and safe operation of the desiccant dryer system.
The control valves are German brand. Long service life and low failure rate. In addition, the pneumatic components are Taiwan AirTAC brand. And the electrical components are Schneider brand.
(5) Work Well With Famous Air Compressor Brands
Lingyu is the top regenerative desiccant air dryer brand in China. Moreover, our desiccant dryer system usually works with famous air compressor brands.
How Does Zero Air Loss Desiccant Dryer Works
Regenerative air dryer adopts advanced chemical technology. It uses desiccant beads to absorb water vapor in compressed air. Good adsorbents have porosity. Besides, they have a large specific surface area.
Under pressurized airflow, the adsorbent surface has the property of adsorbing water vapor. On the contrary, under the reduced airflow, the water vapor will fall off. back into the airflow. At the same time, heating helps the water vapor overcome the Van Der Waals force. Thereby desorb the adsorbent.
The specific workflow of a regenerative desiccant air dryer is as follows:
(1) Adsorption Drying Process of The Desiccant Dryer System
The air compressor discharges saturated compressed air. Then, they will pass through desiccant beads in the drying tower. So, it will adsorb a large amount of water vapor. This water vapor will remain in the capillary pores of the adsorbent. The drying process will wait until the regeneration of the regeneration tower finishes. Then, start to cycle the switch.
(2) Desorption Process of Regenerative Desiccant Dryer
① First is the pressure release process of the desiccant dryer system. The regeneration tower must be reduced to atmospheric pressure. Discharge pressure and start the second process.
② Second is the thermal purging process. The blower is running. It inhales the ambient air. Then the heater will heat up. Then, enter the regenerative desiccant dryer to complete the thermal purge. Finally, remove and drain moisture.
③ Third is the cold purge process. The cooling process starts. At the same time, the heater stops working. The blower sucks the remaining airflow inside. These air streams flow through cooler adsorption towers. Finally, back to the blower. Gradually, it reduces the temperature of the desiccant beads.
④ Fourth is the boosting process. The regeneration exhaust valve closes. At the same time, the regeneration valve remains open. Boost and reach operating pressure.
⑤ Fifth is the standby process. At this time, the regeneration tower has finished pressure boosting. The regenerative air dryer waits for the switch.
⑥ Sixth is the TSE dew point energy-saving control process. It can carry out dynamic control according to the actual dew point. So it can save energy to the greatest extent.
⑦ Finally, it is the process of transformation. So it starts a new process of desiccant dryer system.
FAQs
Yes. Its dew point can reach -70℃. But we usually only do -40°C. There is still some water pollution during the cold purge process. Therefore, it will increase very much power at this time. We recommend the micro air-loss type dryer if you need a -70℃ dew point.
Our regenerative desiccant dryer uses high-quality adsorbent. Its service life can reach 2 years. Of course, we recommend installing precision filters in front of the regenerative air dryer.
