Technical Sheet of Air Desiccant Dryer
| Nama Produk | heatless purge type dryer |
| Kapasiti udara masuk | Std.2.5 Nm3 / min | 150 Nm3 / Hr |
| Prinsip kerja | PSA pressure swing adsorption regeneration |
| Tempoh bekerja | ≈20 min |
| Average regeneration air consumption | Std.10% | Min. 6% Max.12% |
| Tekanan udara masuk | 20～30 bar |
| Air pressure loss at full load | 0.2 bar |
| Keperluan minyak udara masuk | Udara termampat bebas minyak atau ≤0.1ppm (mg/m3) |
| Suhu udara masuk | 10～30 ℃ | Min.2℃ Maks.40℃ |
| Dew point | (-20～-50℃ Ensure 100%) |
| Suhu ambien | Min.2℃ Maks.45℃ |
| Heatless type air dryer weight | 150 Kg |
| Desiccant dryer size | 726×630×1802 mm |
What is Heatless Purge Type Air Dryer For Air Compressor
The heatless dryer is also a pressure swing adsorption dryer. But it is different from a heated regenerative desiccant air dryer. It utilizes the selective adsorption properties of desiccant beads. They can absorb moisture in compressed air. To achieve the purpose of drying. The adsorbent will reach saturation equilibrium at a certain time. Oleh itu, it is necessary to use dry air for regeneration. It’s to restore the adsorption and drying capacity.
The heatless desiccant dryer uses a portion of its drying air. Kemudian, it’s depressurized to near atmospheric pressure. Jadi, it will regenerate the adsorbents as regeneration air. It performs two-tower switching with fixed time. Thereby, it can supply the dry air continuously.
Bagaimana Pengering Udara Desiccant Tanpa Panas Berfungsi?
The heatless regenerative dryer uses the PSA principle. That is the pressure swing adsorption. This is a heatless regeneration method. It is to dry compressed air by circulating adsorption through twin towers. One tower adsorbs the moisture at a certain pressure. The other tower uses a small amount of dry compressed air. Kemudian, it starts regeneration under reduced pressure. The two towers switch each other. Jadi, it enables continuous adsorption and purification.
Wet air enters the heatless desiccant air dryer. Pertama sekali, they enter tower A through the V1 inlet valve. The air flows from bottom to top along the adsorbent. Jadi, it will gradually reduce the humidity level. And achieve a drying effect.
Selepas itu, the dry air flows out through the C1 outlet valve. Part of the dry air passes through the RT regeneration throttle valve. It is expanded to near atmospheric pressure. Kemudian, they enter Tower B. This proportion of dry air is about 13%.
Dry air is also regenerative air. They gradually desorb water vapor from the adsorbent surface. So it can recover the ability of desiccant beads. The vapor will be discharged into the atmosphere through the V4 valve and the SF silencer. After regeneration of the B-tower, the V4 regeneration valve will close. The pressure will gradually return to the working pressure (approx. 7 bar).
Pada masa ini, the B-tower V2 inlet valve opens. And the B-tower enters the adsorption process. Pada masa yang sama, V1 closes. And the V3 regeneration valve opens. The regeneration takes place. This cycle will switch to achieve continuous adsorption operation.
Heatless vs Heated Air Dryer
The adsorption air dryer includes a heatless and micro-heated regenerative dryer. Sekarang, we will introduce their differences.
① Different Working Principles
The former is based on the principle of PSA and the regeneration cycle. It carries out adsorption drying by self-heating. It requires no external heat source. Namun begitu, the latter combines the principles of PSA, temperature swing adsorption, and regeneration cycle. It carries out adsorption drying with external electric heating.
Sebagai tambahan, the heatless regenerative dryer has shorter adsorption cycle. Jadi, valve switching is more frequent. Kemudian, the lifespan is relatively shorter.
② Different Regeneration Air Consumption/Loss
The air loss of the former adsorption dryer is about 12~15%. Namun begitu, the air loss of the heat regeneration dryer is about 7%. So the latter is more energy-saving.
③ Different Drying Effects
The heat regenerative air dryer has a better drying effect than a heatless desiccant air dryer. Biasanya, the former dryer only uses alumina. But the latter will use an alumina + penapis molekul.
Generally speaking, it isn’t easy to achieve deep regeneration for heatless dryer. The dew point is generally -20 to -40°C. But the micro heat regenerative dryer can deeply remove water. The dew point can reach -70℃.
Soalan Lazim
The heatless desiccant dryer discharges the regeneration air. So it will make noise. The regeneration exhaust air has a certain pressure when it is discharged. Selain itu, exhaust speed is fast. So it can cause air vibrations. And produce strong exhaust noise. Secara amnya, it can reach 80 ~ 110 dB. So the muffler can reduce noise.
This air will carry a lot of dust and moisture. Condensation will build up. It is easy to cause the muffler to clog. So pay attention to timely replacement.
A heatless regenerative dryer uses its own dry air to desorb the adsorbent. This dry air passes through the regeneration valve and enters the tower. The orifice has the following functions:
- Reduce the regeneration air pressure to near atmospheric pressure.
- Ensure that the water vapor can be discharged out of the tower smoothly.
The specific replacement cycle based on actual usage. Sebagai contoh, the adsorbent change cycle will be shorter in some harsh environments. The lifetime will be longer if the environment is good and well-maintained. Typically, we need to change the desiccant beads every two years.
The switch cycle time of this heatless desiccant air dryer is about 20 minit.
