Uses of compressed air in various industries

Uses of compressed air in various industries

As the second largest power source after electricity, compressed air has a wide range of applications. Compressed air is widely used in industries such as electricity, spraying, food, metallurgy, petrochemical, automobiles, shipbuilding, precision electronics, chemicals and printing.

　　 Use of compressed air in the power industry

　　 The compressed air system is a very important public system in the power plant. It provides instrument operation air source for many pneumatic actuators in the automatic control system of the unit, and also provides miscellaneous air. The reliability of its work directly affects the safe operation of power plant units and is extremely important for safe production. To ensure the safety of the compressed air system, to a certain extent, is to ensure the safety of the entire plant, so the system is called the "nervous system" of the power plant. If there is moisture in the compressed air, it will bring many follow-up problems to the equipment used: increase the cost of operation and maintenance, reduce the efficiency of the equipment, and affect the quality of the production process. Therefore, the removal of water in the compressed air source purification treatment system is A necessary and important link.

　　 Application of compressed air in spraying industry:

　　 Ordinary air spraying, also known as air pressure spraying, is a coating method that uses a spray gun as a tool and uses compressed air (0.35MPa-0.6MPa) to blow, atomize and spray the paint on the painted surface to form a continuous and complete coating. The compressed air directly from the air compressor cannot meet the requirements of pneumatic tools and spraying air, and the compressed air in the main pipeline contains water vapor, oil vapor and fine dust particles. When the compressed air runs to the end of the pipeline , These water vapor and oil vapor have been condensed into liquid water and oil. If these compressed air containing oil, moisture and fine particles are sprayed directly on the surface of the product after atomizing the paint, it will cause serious defects in the paint film, such as paint film run-out, bubbles, and metal corrosion. If used in pneumatic tools, it will cause a certain degree of wear on its internal pneumatic parts and accelerate the corrosion of the parts.

　　 Application of compressed air in food industry:

Compressed air is the main power source and process gas source widely used in equipment in the food industry such as beer, monosodium glutamate, lactic acid, beverages, food fermentation, etc. and other industries. All pneumatic instruments, pneumatic components, cylinders, solenoid valves, and processes , Fermentation requires compressed air.

In the food and beverage industry, compressed air is needed to control the valves and braking devices in the filling, packaging and bottling automated production lines. The transportation, blasting, ventilation, fermentation, cooling and spraying of powdered substances also require completely pure Compressed air. If the compressed air contains oil or other impurities, it will cause pollution. In the food industry, any small pollution may bring hidden dangers to consumers. According to the requirements, the grade of compressed air in the food industry must reach the level 2 standard, and the dew point of the compressed air should be below -40°C.