Technical Sheet of HOC Type Absorption Air Dryer
| Equipment name | zero air consumption heat of compression desiccant dryer |
| Công suất khí vào | Std.210.0 Nm3 / tối thiểu | 12600 Nm3 / giờ |
| Dryer working principle | Hấp phụ dao động nhiệt độ TSA + split flow cycle regeneration |
| thời gian làm việc (tháp đơn) | ≈240 phút | Max.300 min |
| Mất không khí tái sinh | 0% |
| áp suất không khí đầu vào | thanh std.7 |tối thiểu. 6 thanh Max.10 thanh |
| Pressure loss at full load | ≤7% of inlet pressure |
| Yêu cầu về dầu khí vào | Oil-free compressed air |
| nhiệt độ không khí đầu vào | Std.140℃ | Min.120℃, Max.180℃ |
| Outlet pressure dew point | ≤-40oC |
| Absorption air dryer power | 50.2 KW |
| Công suất máy thổi | 7.5KW |
| Electric heater power | 50KW (heating by 40% chảy) |
| Nhiệt độ sưởi ấm | UCL：150℃，LCL：120℃ |
| Cooling water flow | ≤116T/Hr |
| Áp lực nước làm mát | Std.3 bar Min 2 thanh tối đa:6 quán ba |
| Nhiệt độ nước làm mát | temperature rise | Std.20℃ Min 2℃ Max:27℃ | 5℃ |
| Absorption dryer weight | 12000 Kilôgam |
| HOC air dryer size | 2950 H×5000 L×3200W |
Why Choose Our Zero Air Loss HOC Type Absorption Air Dryer
(1) Energy Efficient
Among all the adsorption air dryers, this one is the most energy-efficient. Compared to a normal HOC dryer, it adds an auxiliary high-efficiency cooler. Vì thế, it achieves complete zero air consumption. Compared with a heatless air dryer, it can save energy by about 80%.
Hiện nay, let’s take an example. And compare the energy consumption of different desiccant dryers. Ví dụ, a 175m³/min oilless centrifugal air compressor exists. And the power is 925KW. Assume that the centrifugal air compressor works 365 ngày một năm. Đồng thời, it runs continuously each day. Ngoài ra, the electricity fee is CNY1.05/kWh. The water fee is CNY0.22/ton.
Specific energy consumption of each absorption dryer:
| KHÔNG. | Air Compressor Air Dryer | Calculation of energy consumption for each absorption air dryer |
Annual operation fees | Compared to heatless dryer, how much energy it can save? |
| 1 | Heatless desiccant air dryer | The ratio of regeneration air consumption is about 15%. (925KW×15%)×24h×365d×CNY1.05 =CNY1276222/year |
CNY1276222 | Tiêu thụ năng lượng cao |
| 2 | Heat regenerative adsorption dryer | Single tower cycle is 4h. Ngoài ra, regeneration air volume is 8%. Và heater power 70KW. Heating time 1.5h. Cold purge time 2.0h. (925KW×8%×3,5h+70KW×1,5h×75%)× 6 times×365d×CNY1.05=CNY776656/year. |
CNY776656 | 39.10% |
| 3 | Thanh lọc máy thổi khí không thất thoát hệ thống máy sấy hút ẩm |
Absorption cycle is 4h. Zero gas consumption. Thời gian gia nhiệt 1.5 h. Heating power 110 KW. Ngoài ra, cold purge time 2.0 h. Công suất máy thổi 18 KW. And blower start time is 3.5 h. (110KW×1,5h×75%+18KW×3,5h)×6 lần×365d× CNY1.05=CNY429431/year |
CNY429431 | 66.30% |
| 4 | Máy sấy HOC tiêu thụ không khí siêu nhỏ | The adsorption cycle is 4h. Và 5% of cold purge air consumption. Cold purge time 1.5h. Nước làm mát sự tiêu thụ: 90t/h. Sự tiêu thụ năng lượng: (925KW × 5% × 1.5h) × 6 times × 365d × CNY1.05= CNY159527/year; Sự tiêu thụ nước: 90t/h×24h×365 days× CNY0.22 =CNY173448 /year; So the total energy consumption of this absorption dryer=CNY159527/year + CNY173448 /year=CNY332975/year |
CNY332975 | 73.90% |
| 5 | Máy sấy HOC không thất thoát khí | The adsorption period of absorption air dryer is 4h. Cooling water consumption: 135t/h. Sự tiêu thụ nước: 135t/h×24h×365 days×CNY0.22 =CNY260172 /year |
CNY260172 | 79.60% |
(2) Stable Dew Point
Our HOC dryer is with an EBZ200-2 multi-core drive intelligent control system. Bên cạnh đó, it adopts PLC for intelligent control. It automatically adjusts for optimum operating efficiency. And it ensures thorough regeneration. Vì thế, the dew point is much more stable.
Ngoài ra, there are air distribution devices at the bottom of the dryer. This increases the contact time with the adsorbent. Make sure the dew point temperature meets the requirements. Our zero air loss absorption dryer can reach -20 and -40℃.
(3) Use High-performance Metal Seated Pneumatic Butterfly Valve
The temperature conditions of the HOC dryer vary greatly. Ordinary valve gaskets are prone to aging and deformation. Vì thế, it will cause the valve not to seal tightly. Cuối cùng, it will affect the performance of the absorption air dryer. Đặc biệt, it affects the dew point of the desiccant dryer.
To eliminate these problems, we use high-performance metal seat valves. They can withstand high temperatures. Bên cạnh đó, it is a German original brand.
(4) High Quality And Sufficient Desiccant Beads
Trước hết, our HOC dryer has ample desiccant beads. 25~28kg adsorbent per cubic air. Vì thế, it can maintain a high drying effect.
thứ hai, choose a well-known brand of adsorption desiccant. Kích thước hạt là 3 ~ 5mm. Good water resistance. Hơn thế nữa, we use the best filling method. It can prevent desiccant from sinking. So it has a longer service life.
Specific Workflow of “heat of compression” Dryer
(1) Adsorption Drying Process of HOC dryer
This process is the same as other absorption air dryers. Adsorbents hold water vapor. This process continues until another tower finishes the regeneration process.
(2) Regeneration Process of Desiccant Air Dryer
The regeneration process consists of 3 bước: twin towers co-current → {hot purge → thermal delay → cold purge} → twin towers co-current
① Two Towers Co-current
Thỉnh thoảng, the absorption air dryer shuts down abnormally. This can avoid affecting the outlet temperature.
② Thermal Purge Process
Lấy tháp A hấp phụ làm ví dụ. The high-temperature air enters the B tower from the V2 valve. Sau đó, it starts thermal purging from top to bottom. Sau đó, the main cooler will cool them to the adsorption temperature. Cuối cùng, vào tháp A.
③ Cold Purge Process
The thermal purge process ends. Tại thời điểm này, desiccant beads are in a dry state. Vì thế, it must cool to be ready for the next adsorption. Sau đó, the cold purge process starts.
The high-temperature air is cooled to about 40℃ by the main cooler. Sau đó, it performs a cold purge to tower B through the V4 valve. Kế tiếp, flow through the auxiliary cooler to cool to the adsorption temperature. Cuối cùng, enter the A tower from V8 and V5.
câu hỏi thường gặp
The use of compression heat dryers is conditional.
It is generally only suitable for centrifuges and oil-free screws. Compressed air inlet temperature should be above 110°C. Bên cạnh đó, the dew point requirements are not strict. Ví dụ, -20℃, or -40℃. Tại thời điểm này, the energy saving of the HOC absorption dryer is beyond doubt. It can achieve zero air consumption.
But sometimes customer requirements are very strict. Ví dụ, they require a dew point lower than -40℃. And the inlet temperature is not always guaranteed to reach 110°C. Sau đó, the energy saving of the HOC absorption air dryer will be greatly reduced. Tại thời điểm này, we should choose a micro air consumption dryer. It’s better than a zero air loss HOC adsorption dryer.
Đúng. For the HOC absorption air dryer, we must confirm the inlet air temperature. It usually cannot be lower than 110°C. Thỉnh thoảng, the intake air temperature is lower than 110°C. Bên cạnh đó, users have strict requirements on dew point. Sau đó, the desiccant dryer must add auxiliary heating.
For a single tower, it’s about 240 phút. Namely, 4 giờ. Many people believe that long-term operation is good. I think it shows the energy saving and performance of the adsorption dryer. But this does not apply to zero air-loss desiccant air dryers.
For other dryers, the regeneration process releases moisture-laden air into the atmosphere. Tuy nhiên, the HOC absorption dryer is different. It will carry some moisture from the previous cycle to the next one. The cycle adsorption capacity of an HOC dryer is much larger than that of other dryers. Vì thế, if we need the same dew point, we can increase the filling amount of the adsorbent. Tuy nhiên, shortening the adsorption cycle is the best way. Vì thế, a short cycle time is good for zero air loss absorption air dryer.
