Higher pressures are mainly used in industrial applications.
(1) Air separation, used to make high concentrations of oxygen (for combustion and chemical reactions), and nitrogen (for protectants and raw materials).
(2) As a source of gas for airflow transportation.
(3) Directly used as a raw material in the nitrogen fertilizer industry.
(4) Gas source for actuators for industrial control (4-7MPa).
(5) The power of pneumatic tools (such as wind picks)
Low pressure (a few thousand PA) is mainly combustion such as boiler blower air, replacement such as when checking containers, cooling such as fans in the summer.
Compressed air has a wide range of uses. Compressed air into the tires of cars and bicycles, not only can support the weight of the car and all the objects in the car, but also make driving, cycling people feel smooth and comfortable. Cars, walls and furniture can be painted with paint in a can mixed with compressed air. Spraying unclean masonry buildings with compressed air can wipe dirt off the surface of the masonry. In addition, compressed air is used in hovercraft, nail guns, the control of automobile door openers and closers, construction, medical care, and many other applications.
Air occupies a certain amount of space, but it has no fixed shape or volume. When pressure is applied to air in a closed container, the volume of the air is compressed, increasing the internal pressure. When the external force is withdrawn, the air returns to its original volume under the internal pressure. If there is a movable object in the container, when the air returns to its original volume, the object will be pushed outward by the pressure of the air inside the container. This principle is widely used in production and life. For example: the ball into the compressed air, the more gas, the harder the ball; tires into the compressed air, the tires will be able to withstand a certain weight. In large automobiles, compressed air is used to switch the doors and brakes; water compressors use compressed air to pressurize water, in factories, compressed air is used to open the hammer to hit the iron; in coal mines, it can be opened to the wind pick drilling. Compressed air is also used for piping liquids and granular objects.
Compressed air is the second largest power energy after electricity, but also has a variety of uses in the process of gas source, its applications throughout the petroleum, chemical, metallurgy, electric power, machinery, light industry, textiles, automobile manufacturing, electronics, food, medicine, biochemistry, national defense, scientific research and other industries and sectors. Undesirable is the compressed air contains a considerable number of impurities, mainly: solid particles - in a typical big city environment per cubic meter of the atmosphere contains about 140 million particles, of which about 80% in the size of less than 2 μm, the air compressor suction filters are incapable of eliminating. In addition, the air compressor system will continue to produce internal abrasive debris, rust residue and oil carbide, they will accelerate the wear and tear of the air equipment, resulting in seal failure; water - the relative humidity in the atmosphere is generally as high as 65% or more, the compression of condensation, that is, it becomes wet saturated air, and entrained with a large number of liquid droplets of water, which is the root cause of corrosion of the equipment, piping and valves, and icing in the winter will also block the pneumatic system in the Small holes in the pneumatic system. It is worth noting that: even if it is separated from the net of pure saturated air, with the lowering of the temperature, there will still be condensate precipitation, about every 10 ° C, its saturated water content will fall by 50%, that is, half of the water vapor into liquid water droplets (see Table 1). So in the compressed air system using multi-stage separation and filtration devices or compressed air pretreatment into a certain relative humidity in the dry air is very necessary; oil - high-speed, high-temperature operation of the compressor using lubricants can play a role in lubrication, sealing and cooling, but contaminated compressed air. The use of self-lubricating materials to develop less oil machine, semi-oil-free machine and full oil-free machine, although it reduces the oil content in the compressed air, but also with the consequent reduction in the life of wearing parts, the machine internal and piping system corrosion and air compressor in the break-in period, wear and tear and load reduction period of the rise in oil content and other side effects. This is undoubtedly a threat to the pursuit of high reliability of automated production lines. It should also be emphasized that the oil brought into the system from the compressor is not beneficial under any circumstances. Because after many high-temperature oxidation and condensation emulsification, the performance of the oil has been greatly reduced, and acidic, on the subsequent equipment not only can not play a role in the lubrication, but also undermine the normal lubrication; micro-organisms - in the pharmaceutical, bio-engineering, food manufacturing and packaging processes, the contamination of bacteria and phage is not to be ignored.
Air occupies a certain space, but it has no fixed shape or volume. When pressure is applied to the air in a closed container, the volume of the air is compressed, increasing the internal pressure. When the external force is withdrawn, the air returns to its original volume under the internal pressure. If there is a movable object in the container, when the air returns to its original volume, the object will be pushed outward by the pressure of the air inside the container. This principle is widely used in production and life. For example: the ball into the compressed air, the more gas, the harder the ball; tires into the compressed air, the tires will be able to withstand a certain weight. In large automobiles, compressed air is used to switch the doors and brakes; water compressors use compressed air to pressurize water, in factories, compressed air is used to open the hammer to hit the iron; in coal mines, it can be opened to the wind pick drilling. Compressed air is also used for piping liquids and granular objects.
Compressed air is the second largest power energy after electricity, but also has a variety of uses in the process of gas source, its applications throughout the petroleum, chemical, metallurgy, electric power, machinery, light industry, textiles, automobile manufacturing, electronics, food, medicine, biochemistry, national defense, scientific research and other industries and sectors. Undesirable is the compressed air contains a considerable number of impurities, mainly: solid particles - in a typical big city environment per cubic meter of the atmosphere contains about 140 million particles, of which about 80% in the size of less than 2 μm, the air compressor suction filters are incapable of eliminating. In addition, the air compressor system will continue to produce internal abrasive debris, rust residue and oil carbide, they will accelerate the wear and tear of the air equipment, resulting in seal failure; water - the relative humidity in the atmosphere is generally as high as 65% or more, the compression of condensation, that is, it becomes wet saturated air, and entrained with a large number of liquid droplets of water, which is the root cause of corrosion of the equipment, piping and valves, and icing in the winter will also block the pneumatic system in the Small holes in the pneumatic system. It is worth noting that: even if it is separated from the net of pure saturated air, with the lowering of the temperature, there will still be condensate precipitation, about every 10 ° C, its saturated water content will fall by 50%, that is, half of the water vapor into liquid water droplets (see Table 1). So in the compressed air system using multi-stage separation and filtration devices or compressed air pretreatment into a certain relative humidity in the dry air is very necessary; oil - high-speed, high-temperature operation of the compressor using lubricants can play a role in lubrication, sealing and cooling, but contaminated compressed air. The use of self-lubricating materials to develop less oil machine, semi-oil-free machine and oil-free machine although the compressed air to reduce the oil content, but also with the consequent reduction in the life of wearing parts, machine internal and piping system corrosion and air compressors in the break-in period, wear and tear and load reduction period of the rise in oil content and other side effects. This is undoubtedly a threat to the pursuit of high reliability of automated production lines. It should also be emphasized that the oil brought into the system from the compressor is not beneficial under any circumstances. Because after many high-temperature oxidation and condensation emulsification, the oil performance has been greatly reduced, and acidic, on the subsequent equipment not only can not play a role in lubrication, but also undermine the normal lubrication; micro-organisms - in the pharmaceutical, bioengineering, food manufacturing and packaging processes, the contamination of bacteria and phage can not be ignored