SOLLANT GROUP
As a professional air dryer manufacturer, we offer factory-direct supply with strict quality control from raw materials to finished products. Standard and customized designs are available to meet unique requirements. OEM and ODM partnerships are welcome, ensuring flexible and responsive service.
A refrigerated air dryer removes moisture from compressed air using the principle of refrigeration dehumidification. It employs a fully enclosed compression refrigeration system to cool the high-temperature, saturated compressed air discharged from the air compressor. As the air cools, water vapor and oil mist condense into liquid droplets, which are then removed through an air-water separator and automatic drain.
The incoming hot, saturated air first passes through a pre-cooler, where it exchanges heat with the outgoing cold dry air, lowering its temperature. It then enters the evaporator, where it undergoes further cooling by the refrigerant. This double-stage cooling causes moisture in the air to condense into water droplets. These droplets are separated and drained out automatically.
Finally, the cold, dry compressed air is reheated in the pre-cooler by the incoming air. This process raises its temperature slightly while reducing its relative humidity, resulting in dry air with a low dew point at the outlet.
◆The aluminum plate-fin heat exchanger is designed and processed with aluminum-magnesium alloy materials. Due to its superior heat exchange efficiency, it only needs a smaller cooling capacity to meet the design requirements when applied to the refrigerated dryer. Compared with the shell and tube refrigerated dryer, its cooling capacity requirement is about 25% less. After the overall heat exchanger is processed, a helium leak test will be carried out. Its process can control the leakage rate to the lowest.
◆The heat exchanger is made of aluminum-magnesium alloy, so it will not cause rust or corrosion on the inner wall of the pipe, avoiding secondary pollution of the compressed air.
◆ Under the high working efficiency of aluminum plate-fin heat exchanger, the maximum design temperature difference of air inlet and outlet can reach 3°C. The original cooling capacity with the cooling of outlet air can avoid loss, so the cooling demand is smaller than that of shell and tube heat exchanger. Therefore, the electric energy consumption required for the plate-fin heat exchanger is small, and the energy consumption can be saved by 25% compared with shell and tube cold dryer.
◆ The high-power model is designed by assembling multiple heat exchangers in parallel. Since standard identical components are used, installation and maintenance are more convenient, thereby reducing equipment maintenance costs.
◆ The heat dissipation design of small models is a rear external rotor fan suction type, which better caters to the user’s on-site heat dissipation device installation and high temperature problem in the on-site environment.
◆ The whole machine seal adopts thickened sheet metal to ensure the beautiful appearance , firmness and reliability of long-distance transportation . The sheet metal has been processed by pickling, degreasing, phosphating, high-temperature baking paint, etc. to ensure the service life of the equipment.
◆Good heat exchange performance and saving energy consumption required for refrigeration . The heat exchange performance of aluminum plate-fin heat exchanger is much greater than that of conventional shell and tube heat exchanger. The maximum temperature difference between the inlet and outlet of air can reach 2 ℃, which reduces the required cooling capacity and thus saves energy consumption of the dryer.
| Heat exchanger series | Inlet and outlet temperature difference ℃ | Save energy |
| High-end small flow heat exchanger | 5-7 | 20% |
| Conventional tube-fin heat exchanger | 15~20 | High energy consumption |
| Large flow heat exchanger | 3-5 | 30% |
◆ Larger heat exchange area : Aluminum plate-fin heat exchangers are composed of multiple layers of corrugated fins and partitions. The fin spacing is very small and the number of layers is large, so the heat exchange area is large and the heat exchanger structure is compact ;
◆Stainless steel wire mesh filtration separation
The air-water separation of aluminum plate-fin heat exchangers is mostly done by stainless steel wire mesh filtration separation, which has the advantages of simple structure and high air-water separation efficiency. The stainless steel wire mesh is generally made of SST304 material, which is strong and corrosion-resistant.
◆ The condensers all use internally threaded copper tubes, which increase the heat exchange efficiency by about 20% compared to the bare tubes used by other brands;
◆High-end and efficient refrigeration accessories : Models with a processing flow rate ≥1 1 .5Nm³/min adopt a constant pressure expansion valve design , and the equipment is equipped with a defrost valve to ensure that the equipment will not have ice blockage in the compressed air path . It has strong reliability and uses Shanghai Shangheng /Denmark Danfoss/US Emerson hot gas bypass valves to ensure that there is no ice in the system.
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