Oxygen, the chemical formula O2, is a colorless, odorless and tasteless gas. It is the most abundant element on the earth's surface. It is indispensable to most life on earth. We breathe air to absorb oxygen. In terms of technology, oxygen is extracted from the air liquefaction process, and the oxygen content in the air is 21%. It is the basis of all breathing and combustion processes and is therefore a prerequisite for almost all life processes.
The principle of separation of liquefied air is that the boiling points of different air components are different. During the countercurrent flow, nitrogen is formed in the gas rise, and oxygen is formed in the liquid drop. This means that gaseous nitrogen accumulates at the top of the lower temperature of the rectification column, while liquid oxygen accumulates at the bottom of the rectification column at a higher temperature.
Medical oxygen plays a vital role in hospital care and clinical care, such as in resuscitation, surgery, and various treatments. Oxygen can also be used as a breathing gas for diving after mixing with nitrogen or helium.
Commercial oxygen can be obtained by liquefying and distilling air in an environment in an air separation plant. A second purification is required if there is a high requirement for purity. High purity oxygen can also be produced by electrolyzing water.
The main industrial application of oxygen is combustion. Many materials that are normally incombustible in air can burn in oxygen, so mixing oxygen with air greatly improves combustion efficiency in the steel, non-ferrous metals, glass and concrete industries. When mixed with fuel gas, it is widely used in cutting, welding, brazing, and glass blowing to provide higher temperatures than air combustion, thereby increasing efficiency. Together with the oxy-fuel, plasma and laser processes, a jet of gaseous oxygen can be used to cut steel. Oxygen is also commonly used in hot slit drilling or cutting materials such as concrete, brick, stone and various metals.
Oxygen is often used as a component of a mixed shielding gas due to its ability to help stabilize the arc and reduce surface tension. For example, the chemical industry often relies on pure oxygen to increase the efficiency of the oxidation reaction. High purity oxygen is used in laboratories, controlled operations, gas-cooled nuclear reactors, metal analytical instruments, and in semiconductor and fiber production.
Oxygen is an effective way to purify wastewater and sewage before water treatment. Other applications include sealing glass ampoules in the pharmaceutical industry, water enrichment in water aquaculture, as one of a mixture of modified atmosphere packaging (MAP) and liquid explosives.
Oxygen application:
l cutting cutting
l welding welding
l Pure oxygen aeration SOLVOX in sewage treatment
l LoToX in exhaust gas denitrification treatment
l Aquaculture dissolved oxygen Oxygen Dissolved for Aquaculture
l Food Atmosphere Packaging MAP (Modified Atmosphere Packaging)
l Oxyfuel combustion Oxyfuel
l Oxygen-enriched combustion Oxygen Enrichment
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