One of the most important lessons you can learn when it comes to compressed air distribution is to never underestimate the damage that condensation and contamination can cause. To maximize the life and performance of the equipment, it is imperative that the air is treated according to an understanding of the external conditions and the required application.
There are several types of contaminants that can be found in the compressed air system, the most common, which include:
Water (vapor and liquid)
Oil (vapor and liquid)
Rust scales and pipes
Dirt and also
Most of this contamination is derived from atmospheric air, which, as is known, contains 0.05 mg / m3 to 0.5 mg / m3 of oil vapors from sources such as automobile exhaust gases and processes industrial Also in atmospheric air, water is collected in the form of condensate that occurs when the air is cooled to a temperature below atmospheric.
However, there are other sources of contamination, including the pipe network and the compressor itself. This is usually associated with the general wear and tear of such equipment in the long term.
The presence of moisture and solid particles in the pneumatic network can have a serious negative impact on the distribution system. The inconsistent supply of dry, clean air can cause costly production problems, air leaks and pressure drops, as well as increased equipment damage and corrosion. Therefore, it is important to properly control the condensate and contaminants, following these three basic steps: drying, filtering and separating:
- Integrating an air dryer into a compressed air system is an effective way to eliminate air condensation before reaching the point of use.
- When the air is compressed, the water content is concentrated, allowing the evaporated water to pass through the system. A refrigerated dryer cools the air, during which the water present condenses and then separates and discharges mechanically. Then, the remaining dry air can overheat and move through the pipe network.
- A well-designed filtration system is an integral part of clean and dry compressed air. Filter packages vary by application, but generally include:
particle filter to remove particles such as dust, pollen and rust;
a coalescing filter to separate any remaining liquid, such as oil and water; Y
Absorbent filter (carbon) to eliminate odors and flavors (for breathable air requirements)
It is important to consider the environmental impact of your compressed air system.
In addition to water, the condensate usually consists of 200-500 parts per million of oil, which corresponds to up to 5 liters of its annual condensate collection (based on an average compressor of 18 kW). Unloading this mixture on the ground or in the river can have a devastating effect on plants and wildlife. In addition, discharge to the sewer system can cause interruptions in the operation of wastewater treatment plants and contradict local council laws.
The oil / water separator works to isolate the condensate oil created by the compressed air treatment systems, which allows the insulated oil to be discharged in an environmentally sound manner.