What equipment should a typical compressed air system include

What equipment should a typical compressed air system include

In addition to the compressor itself, typical compressed air systems often include air post-processing equipment such as dryers, filters, and oil-water separators, which are also critical to the quality of compressed air.

　　 Untreated compressed air may contain water in the form of water droplets or steam, oil droplets or mist of oil and gas, and dust. In some application areas, these substances can contaminate end products and even increase costs. The purpose of air treatment is to produce compressed air according to user requirements.

　　 The air in the atmosphere always contains moisture in the form of water vapor. Some water vapor exists in compressed air, which may cause a series of problems, including: high maintenance cost, shortened service life, damage to tool performance, high suppression rate of spray paint and injection molding leakage rate, increased leakage, control system and tool interference, Due to corrosion and more expensive installation costs, the service period of the piping system is shortened.

　　 Use after cooler, condensation separator, freeze dryer and adsorption dryer and other equipment to separate water.

　　The compressor working under the pressure of 7bar(e) can compress overpressure air to 7/8 of its volume. This also reduces the air's ability to retain water vapor to 7/8. The quality of the released water is considerable. For example, a 100kW air compressor sucks in air at 20°C and a relative humidity of 60%, and releases approximately 85 liters of water during an 8-hour shift. Therefore, the total amount of separated water will depend on the application area of ​​the compressed air. In turn, this determines which cooler and dryer combination is more appropriate.

　　 The amount of lubricating oil in compressed air depends on several factors, including machine type, design, age and conditions. In the following aspects, there are mainly two types of compressor designs: the compression chamber contains lubricant, and the compression chamber contains no lubricant.

　　 In the lubrication compressor, the lubricating oil participates in the compression process and also exists in the compressed air (completely or partially). However, in advanced lubricated piston compressors and screw compressors, the amount of lubricating oil is very limited. For example, in an oil-injected screw compressor at 20°C, the lubricating oil content in the air is less than 3mg/m3. By using a multi-stage filter, the lubricating oil content can be further reduced.