Importance of Air Compressor Post-Treatment

Compressed air is the second-largest power energy source after electricity and a multi-purpose process gas source. 

More than 80% of manufacturing enterprises utilize compressed air. In actual production, compressed air either comes into direct contact with products or drives gas-consuming equipment. 

Moisture, oil mist and impurities contained in compressed air will directly affect product quality, equipment performance and service life.

1. Solid particles: The air intake filter of an air compressor cannot remove particles smaller than 2 μm. The air compressor system continuously generates wear debris, 

2. rust residues and oil carbides, which accelerate the wear of gas-consuming equipment and cause seal failure.

3. Moisture: After atmospheric air is compressed and condensed, it turns into wet saturated air carrying large amounts of liquid water droplets. 

4. These droplets are the primary cause of corrosion to equipment, pipelines and valves. In winter, frozen water may block tiny passages in pneumatic systems. 

5. Even thoroughly separated saturated air will produce condensed water as temperature drops. Approximately every 10°C decrease in temperature reduces saturated water content by 50%, 

6. meaning half of the water vapor is converted into liquid water droplets.

7. Oil content: Lubricating oil used in high-speed, high-temperature air compressors provides lubrication, sealing and cooling, yet contaminates compressed air. 

8. Although oil-free compressors reduce oil content in compressed air, they bring side effects such as shortened service life of wearing parts and corrosion inside the unit and piping systems, 

9. posing threats to automated production lines and gas equipment requiring high reliability.

Therefore, compressed air post-treatment equipment serves as key equipment to remove moisture, filter impurities and eliminate oil mist for clean compressed air. 

It acts as the "final barrier" safeguarding product quality and gas-consuming equipment. If this barrier fails, compressed air will become useless and even cause troubles.

In terms of working principles, refrigerated air dryers (RD) adopt refrigerant cooling technology to condense water vapor in compressed air into liquid droplets, 

which are discharged via automatic drain valves to lower water content. Refrigerated dryers are sensitive to ambient temperature during operation. 

Every 5°C rise in inlet air temperature reduces cooling efficiency by 30% and significantly increases the supply air dew point. 

Generally, they cannot operate effectively above 38°C or below 0°C. As refrigeration technology is adopted, the refrigerant evaporation temperature must not drop below 2°C; 

otherwise, ice formation will block pipelines and hinder compressed air flow. Can we expand the applicable ambient temperature range of refrigerated dryers through technological innovation? The answer is yes. 

Take household air conditioners as an example:

National standards specify that air conditioners operate normally within -7°C to 43°C. However, in certain regions or seasons, 

the condenser temperature of outdoor units may exceed 50°C. When exceeding the heat dissipation limit of the condenser, the compressor will trigger overheat protection and stop cooling normally.

Evaporator corrosion and leakage have long been a critical defect of refrigerated dryers. Users often encounter evaporator leakage issues. 

Moisture, oil and other impurities in compressed air enter the refrigeration system, damaging the refrigeration compressor and other refrigeration components. 

In severe cases, the entire dryer is scrapped, resulting in persistent water-related troubles. Is it feasible to develop refrigerated dryers with leak-proof evaporators? 

Absolutely. Stainless steel refrigerated dryers available on the market completely resolve evaporator leakage caused by corrosion and have obtained patent certifications. 

Such dryers not only eliminate evaporator corrosion leakage problems, but also feature a service life of over 20 years. They simplify bypass piping layout, reduce installation costs and improve installation efficiency.

Similarly, technological innovation for adsorption dryers can be carried out in multiple dimensions: expanding the applicable working environment, 

achieving lower and more stable dew points, extending service life, cutting energy consumption, reducing regeneration air consumption, 

minimizing pressure drop, lowering noise and optimizing structural design. Measurable technical data can be used to verify the advancement of these technologies.

Compressed air precision filters are mainly used for compressed air purification and impurity removal, filtering dust, water vapor, abrasive particles, 

oil contaminants and bacteria mixed in compressed air. Poor filtration performance leads to the formation of highly corrosive sludge mixed with dust, oil and water. 

This sludge rapidly wears pneumatic equipment, clogs valves and corrodes pipelines, triggering air leakage, damage to tools and equipment, production shutdown, 

higher maintenance costs, product rejection, risks to health and safety, and deterioration of the working environment.

Filtration efficiency, pressure drop and service life are three core indicators to evaluate filter quality. What are the actual performance data of our filters against these three indicators? 

By benchmarking advanced international standards and theoretical parameters, we can identify directions for technological innovation from the perspectives of materials, structure, cost performance and efficiency.