Adsorption type compressed air dryer composition
- Pressure gauge.
- Pressurised container.
- Automated control system.
- Inlet/outlet air filtration system.
- Pneumatic muffler.
- Pneumatic air supply valves.
Operating principle
Two columns of the adsorption dryer are filled with a special moisture-absorbing substance – adsorbent, which is active aluminium oxide, zeolite or silica gel.
Equipment operating principle:
- Humid air compressed by a compressor is fed inside one column. The pressurised air stream passes through an adsorbent bed. Moisture is absorbed by the molecular sieve and the output is dehumidified compressed air.
- At the same time, a small amount of compressed dry air is sent to another column to regenerate the adsorbent.
- The dehumidified air then flows to the dehumidifier outlet and through it to the pipework system.
- Operator controls all dehumidification processes and operational readings from the control panel, which consists of a PLC, operator panel, valves and sensors.
Regeneration types
ONH Systems manufactures cold and hot regeneration adsorption dryers. Their principle of operation is the same. The only difference is the method of regeneration to restore original properties after the adsorbent is saturated with moisture.
Cold regeneration
In cold regeneration, a portion of dried compressed air is used to regenerate the adsorbent. It is fed into the adsorbent layer in such a way that the dry air absorbs the moisture accumulated in the adsorbent and removes it from the adsorber. The regeneration process is carried out without heating the adsorbent bed.
Hot regeneration
Hot regeneration makes it possible to avoid large losses of compressed air after drying. The moist air stream passes through the pre-filter and enters the first column, where it is dehumidified to a temperature of -40 °C. The second column operates in regeneration mode, which consists in heating the air to 140 °C and its subsequent cooling with blowing. The molecular sieve (adsorbent) is dried by an electric heater.
A maximum of 7 % dry compressed air is used in the cold blowing phase. This avoids gas loss during the heating process. The cooled, dried stream is blown through an adsorber and a line filter at the unit outlet, which traps dirt and dust particles. The consumer receives quality dry and clean air. A complete cycle of operation in hot regeneration units lasts several hours. The unit automatically determines the drying degree of the molecular sieve based on the temperature sensor readings.
When selecting an industrial adsorption dryer, it should be based on the principle that cold regeneration equipment has lower cost and hot regeneration dryers have higher efficiency.
Technological specifications
| Model | Performance, m3/hour | Attachment | |
| Inlet | Outlet | ||
| AS-20 | 20 | 17 | DN15 |
| AS-30 | 30 | 26 | DN15 |
| AS-45 | 45 | 38 | DN15 |
| AS-60 | 60 | 51 | DN15 |
| AS-80 | 80 | 68 | DN20 |
| AS-100 | 100 | 85 | DN20 |
| AS-150 | 150 | 128 | DN25 |
| AS-200 | 200 | 170 | DN25 |
| AS-300 | 300 | 255 | DN40 |
| AS-400 | 400 | 340 | DN40 |
| AS-600 | 600 | 511 | DN40 |
| AS-800 | 800 | 681 | DN50 |
| AS-1000 | 1000 | 851 | DN50 |
| AS-1200 | 1200 | 1021 | DN50 |
| AS-2000 | 2000 | 1702 | DN65 |
| AS-2500 | 2500 | 2128 | DN75(80) |
| AS-3000 | 3000 | 2553 | DN75(80) |
| AS-3500 | 3500 | 2979 | DN100 |
| AS-4000 | 4000 | 3404 | DN125 |
The ONH Systems Company equipment’s advantages
Our compressed air adsorption dryers offer the following advantages in use:
- Easy installation and operation.
- The set dew point precise maintenance at -40 °C.
- Long production life due to the durability of the materials used.
- Compressed air losses for regeneration at rated capacity and pressure are no more than 10-15%.
- Compact dimensions of dryers make it possible to install them in a container or in closed rooms.
The latest generation of technology is utilised in equipment manufacturing. Adsorption compressed air dryers are thoroughly tested before shipment to the customer. We design equipment for individual requirements and carry out commissioning, service and maintenance, and operator training.
Drying units can be optionally equipped with sensors upon your request:
- inlet and outlet air pressure sensors;
- outlet air dew point sensors;
- outlet air temperature sensors;
- air flow meter sensors at the unit outlet.
Having a dew point sensor or flow meter allows you to control the duty cycle, operate the equipment more efficiently and optimise energy costs at your facility.
To calculate equipment cost, contact a technical specialist by phone +7 (495) 150-44-22. You can also use the online form. We supply equipment to all regions.
