What is compressed air for, what are the things of compressed air

With the rapid development of the national economy, compressors are widely used in the industry. Compressors are known as "general purpose machinery" because of their versatility. According to the different characteristics of the use of compressed gas, it can be divided into the following types:

1. Compressed air as power:

For driving all kinds of pneumatic machinery, the exhaust pressure of pneumatic tools is 7 8 kg square centimeters; It is used for control instruments and automation devices, and the pressure is about 6 kg square centimeter; The vehicle is automatic, the doors and windows open and close, the pressure is 2 4 kg square centimeters; agitation in the pharmaceutical industry, in the winemaking industry, with a pressure of 4 kg cm²; The weft blowing pressure in the air-jet loom is 1 2 kg square centimeter; The starting pressure of medium and large diesel engines is 25 60 kg square centimeters; fracturing of oil wells with a pressure of 150 kg cm²; "Quadratic" oil production, the pressure is about 50 kg square centimeter; The pressure of high-pressure blasting coal mining is about 800 kg square centimeter; It is powered by pressurized compressed air in the defense industry; The sinking and floating of submarines, the firing and driving of torpedoes, and the salvage of wrecks are all powered by compressed air at different pressures.

2. Compressed gas is used for refrigeration and gas separation

The gas is compressed, cooled, expanded and liquefied for artificial refrigeration (refrigeration, air conditioning, etc.) such as ammonia or freon compressors. Its compression pressure is mostly 8 12 kg square centimeters, and this type of compressor is usually called a "chiller" or "ice machine". In addition, if the liquefied gas is a mixture, each component can be separated separately in the separation device to obtain various gases that can be read by qualified lip reading.

For example, pure oxygen, pure nitrogen, and pure xenon, krypton, argon, helium and other rare gases can be obtained after air liquefaction and separation.

3. Compressed gas is used for synthesis and polymerization;

In the chemical industry, gases are compressed to high pressures, which are often beneficial for synthesis and polymerization. For example, nitrogen and hydrogen to ammonia, hydrogen and carbon dioxide to methanol, carbon dioxide and ammonia to urea, etc. In the chemical industry, for example, high-pressure polyethylene has a pressure of 1500 to 3200 kg square centimeter.

4. It is difficult to compress gas for hydrorefining of oil

In the petroleum industry, hydrogen is heated by artificial methods, and reacted with oil after pressurization, which can crack the recombinant components of hydrocarbons into light components of hydrocarbons, such as the lightening of heavy oil, hydrorefining of lubricating oil, etc.

5. Gas delivery

The compressor used to transport gas in the pipeline determines its pressure depending on the length of the pipeline. When sending remote gas, the pressure can reach 30 kg square centimeter. The bottling pressure for chlorine is 10 15 kg sq cm and the CO2 bottling pressure is 50 kg 60 sq cm.

Compressed air 2007-3-31 14:43:12 |by: Class Six (3) ].

Compressed air is the second largest power energy source after electricity, and it is a process gas source with a variety of purposes, and its application range covers petroleum, chemical industry, metallurgy, electric power, machinery, light industry, textile, automobile manufacturing, electronics, food, medicine, biochemistry, national defense, scientific research and other industries and departments. Less desirable is that compressed air contains a considerable number of impurities, mainly: solid particulates - in a typical large urban environment, there are about 140 million particles per cubic meter of atmosphere, of which about 80% are less than 2 m in size, and the air compressor suction filter is powerless to eliminate.

In addition, the air compressor system will also continuously produce abrasive chips, rust residue and oil carbide, which will accelerate the wear of gas-using equipment and lead to seal failure; Moisture – The relative humidity in the atmosphere is generally as high as 65% or more.

Compressed gases are used for refrigeration and gas separation.

The compressed air stuff is as follows:1. Liquefied gas.

Second, the glass factory blows the cylinder.

3. Explosives are discharged from the mine opening.

Fourth, the production of plastic plants.

5. Rocket launches.

Sixth, the ball cheers.

Principle of Ball Pumping:Compressed air is injected into the ball, and the more air you have, the harder the ball becomes; When compressed air is injected into the tire, the tire can bear a certain weight. On large cars, with compressed air switches.

doors and brakes; The hydraulic press uses compressed air to pressurize the water, and in the factory, the compressed air is used to start the air hammer to strike the iron; In coal mines, it can drill holes with a pickaxe. It is also used for pipelining the transport of liquids and granular objects.