Technical Sheet of Stainless Steel Regenerative Desiccant Air Dryer
| Machine name | micro air consumption blower purge compressor desiccant dryer |
| Dryer air flow | Std.65.0Nm3 / min | 3900Nm3 / Hr |
| Working principle | TSA temperature swing adsorption + blower purge regeneration |
| Cycle time (single tower) | ≈240 min |Max.300 min |
| Regeneration air consumption | about 2% |
| Inlet air pressure of regenerative dryer | Std.7 bar |Min. 6 bar Max.10 bar |
| Pressure loss at full load | ≤3% of inlet pressure |
| Inlet air oil requirements | Oil-free compressed air ≤0.1ppm（mg/m3） |
| Inlet air temperature | Std.10～30℃ | Min.2℃ Max.40℃ |
| Outlet dew point | ≤-40℃ |
| Adsorption dryer power | 44KW |
| Blower power | 7.5KW |
| Electric heater power | 36KW |
| Heating temperature | Upper limit: 190°C, lower limit 170°C |
| Absorption dryer weight | 3800Kg |
| Size of regenerative desiccant air dryer | 2918H×2500W×1900 D |
Why Choose Our Stainless Steel Compressed Air Desiccant Dryer
(1) 304 Stainless Steel Material
Firstly, compressed air contains a lot of moisture. Ordinary regenerative dryer systems are prone to rust. Thereby, it will pollute the air. It can also damage downstream air-use equipment.
Secondly, many industries have requirements for dryer materials. Especially the medical and food industries. Air quality requirements are higher. So, the dryer material must be stainless steel. Compressor desiccant dryers can’t use carbon steel.
In addition, other special industries are also the same. For example, the new energy lithium battery industry. They prohibit using zinc, copper, and nickel elements in drying machines. Because of these materials, dust will fall into the lithium battery. It may cause a polarized reaction. Heat destroys the diaphragm. Finally, it will cause the battery to explode or burn. So, it must choose a stainless steel regenerative desiccant air dryer.
(2) Highly Energy Efficient
Suppose there is an oil-free centrifugal air compressor. Its air capacity is 200m3/min. And the power is about 1100KW. Continuous operation 365 working days a year. The electricity fee is CNY1.0/kWh. In addition, the water fee is CNY0.2/ton.
| No. | Compressor Desiccant Dryer | Energy consumption calculation | Operating cost each year | Energy saving ratio compared |
| of regenerative dryers | with heatless air dryer | |||
| 1 | Heatless adsorption air dryer | The energy consumption is regeneration air. | CNY1445400 | High energy consumption |
| It is about 15% of the inlet air flow. | ||||
| （1100KW×15%）×24h×365d×CNY1.0 | ||||
| #NAME? | ||||
| 2 | Heated absorption air dryer | Cycle time of one adsorption tower is 4 hours. | CNY846982 | 41.40% |
| And the regeneration air consumption is about 8%. | ||||
| In addition,the dryer heater power is 70KW. | ||||
| And heating time is 1.5 hours. Cold purge time is 2.0 hours. | ||||
| （1100KW×8%×3.5h+70KW×1.5h×75%）× | ||||
| 6 times×365d×CNY1.0＝CNY846982/year | ||||
| 3 | Micro air loss blower purge | Cycle time of one desiccant tower is 4 hours. | CNY406354 | 71.80% |
| regenerative desiccant air dryer | The regeneration air consumption is about 2%. | |||
| Regeneration time is 2.0 hours. Heater power is 110KW. | ||||
| And heating time is 1.5 hours. In addition, blower power | ||||
| is 18KW. Blower running time is 1.6 hours. | ||||
| （1100KW×2%×1.5h+110KW×1.5h×75%+18KW×1.6h）×6 times×365d×CNY1.0＝CNY406354/year |
To sum up, the micro air loss blower regenerative dryer is more energy efficient.
(3) Use High Quality Parts And Materials
The structure of a regenerative desiccant air dryer is simple. It mainly controls the airflow through various valves. Firstly, we use high-quality pneumatic valves. It is metal-seated and heat-resistant. And it’s a German brand. Therefore, the failure rate is low. Our compressor desiccant dryer is stable in performance.
Secondly, we use high-performance adsorbents. Moreover, our desiccant filling amount is sufficient. It’s 20% more than other dryers. This dryer uses activated alumina and a 4A molecular sieve.
(4) Stable Dew Point
Our dryer dew point fluctuation is small. This is mainly due to the following reasons.
① Firstly, the filling capacity of our desiccant beads is very sufficient. So it can maintain a high drying effect.
② Secondly, there is an airflow distribution structure. These devices are at the bottom of our regenerative desiccant air dryer. Therefore, the air and the adsorbent are in full contact. And it can fully remove the moisture.
③ Third is the most important. Our regenerative dryer adopts an EBX200-2 control system. This is a multi-core drive control mode. This is more than 30% more energy saving than single-core mode. Because it can adjust the operation efficiency of the dryer.
How does micro air loss blower purge regenerative desiccant air dryer work
This compressor desiccant dryer has an independent blower. So it can suck in the surrounding air. Then heater heats the air. Afterwards, hot air can heat the desiccant beads. This will desorb moisture. But this is different from zero air loss regenerative dryer. It uses a small amount of regeneration air for cold purging. This ratio is about 2%. Thus, they can cool down the regeneration tower. It only consumes very little compressed air. The following is the working process of the dryer:
(1) The drying process of regenerative desiccant air dryer
This process is also called adsorption. Saturated compressed air has a lot of moisture. They pass through the desiccant beads in the drying tower. The adsorbents have capillary pores on it. So they can absorb a large amount of water vapor.
(2) Desorption process of compressor desiccant dryer
Desorption involves at least six processes:
Pressure relief→hot purge→cold purge→pressure boost→standby→TSE dew point energy saving control (optional)→process change
① Firstly, depressurize the regeneration adsorption tower. Reduce it to atmospheric pressure. Then compressor desiccant dryer start next process.
② Secondly, start the thermal purge process. Air is drawn in by means of a blower. Then heat it with an electric heater. Finally, blow the hot air into the adsorbent. So they can remove moisture.
③ Then there is the cold blowing process. The regenerative desiccant air dryer utilizes 2% of the system air. It gradually reduces the temperature of the adsorbent.
④ The previous process ends. The regeneration discharge valve closes. At the same time, the cold blow regeneration valve remains open. Boost and reach operating pressure.
⑤ The rest of the process is the same as the zero air loss regenerative dryer.
How to operate regenerative desiccant air dryer rightly
(1) Inspection before starting compressor desiccant dryer
① Firstly, check the appearance of regenerative dryer. Observe whether the adsorption air dryer is complete.
② Secondly, check the electrical schematic diagram. Confirm if the wiring of regeneration dryer is loose.
③ Thirdly, check whether the air pipe of each valve is loose. Besides, oberve whether the setting value of the pressure reducing valve is normal (the setting value should be 0.5～0.6Mpa).
④ Sometimes there are also compressed air filters. Also check that the front and post filters are installed correctly.
(2) Start-up steps of blower heat regenerative dryer
① Firstly, slowly close the outlet stop valve. Pressurize the two drying towers to pipe pressure.
② Secondly, check the compressor desiccant dryer for leaks. At this time, keep the regeneration exhaust valve closing.
③ Thirdly, press the start button. Start the regenerative desiccant air dryer.
④ The regeneration exhaust valve opens automatically. One of the two drying towers begins to depressurize.
⑤ Let the regenerative dryer run for one or two working cycles. Then open the outlet valve again.
⑥ If there is too much dust in the air, please stop the desiccant dryer. And replace the desiccant beads.
(3) Observe the operation of the adsorption dryer
① The pressure of the drying tower should be the same as the pipeline pressure. The pressure gauge on the tower has a display.
② The pressure of the regeneration tower should be 0.
(4) Maintenance of blower heat regenerative desiccant air dryer
① During the first month, clean the filter element. And it should be replaced regularly in the future. Also, clean the dryer muffler. If the regeneration tower pressure is greater than 0.035Mpa, replace the muffler.
② Every three months, close the pressure reducing valve. Then check the pneumatic valve for leakage.
③ It needs no lubrication in the regenerative desiccant air dryer.
④ Check the automatic drain valve on the filters every day.
⑤ Check whether the actions of regenerative dryer are normal.
⑥ Regularly observe the operating conditions of compressor desiccant dryer.
⑦ Check the filter pressure drop. If exceeds 0.07Mpa, replace the filter element.
⑧ Every three months, close the inlet/outlet valve. Completely depressurize the regenerative desiccant air dryer system. Open the desiccant filling port. Sampling to check desiccant. If the adsorbent is with oil and crushed, replace them.
