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[Chemical Knowledge]：Industrial Principle and Technical Progress of Oxygen Production

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With the development of modern industry, more and more industries need to use oxygen, and the method of oxygen preparation is constantly updated and improved. This article will start from the basic principle of oxygen preparation, the specific application in industry and the current technological progress, and introduce the industrial principle and technological progress of oxygen production in detail.

1. The basic principle of oxygen preparation

At present, the industrial preparation of oxygen mainly uses two methods: one is molecular sieve adsorption method, the other is low temperature fractionation method.

1. Molecular sieve adsorption method

molecular sieve adsorption method is a more common method in industry. It uses the different sizes of nitrogen and oxygen molecules in the air to realize the separation of nitrogen and oxygen when passing through a specific molecular sieve. The specific process
the
is: the air through the molecular sieve channel, in the special structure of the molecular sieve, the diameter of the nitrogen molecule is larger than the oxygen molecule, will be absorbed in the molecular sieve, and the oxygen molecule will not be adsorbed, gradually separated, the formation of high concentration of oxygen.

2. Low-temperature fractionation

Low-temperature fractionation mainly realizes the separation of oxygen and nitrogen through the difference of boiling points of substances at different temperatures. The specific process of

is: the air first passes through the air pre-cooler to cool down, and then passes through the distillation tower, in which the air is heated in turn, and then cooled. In this process, nitrogen has a low boiling point and may be liquefied at a lower temperature, while oxygen has a higher boiling point and needs to be liquefied at a higher temperature, so a high concentration of oxygen can be separated by continuously increasing the temperature. The specific application
of

2. industry
oxygen is widely used in industry, from traditional industries such as steel, petrochemical, energy to emerging fields such as medical treatment, environmental protection, and food.

1. Steel industry

The steel industry is one of the most widely used industries for oxygen. Oxygen can be used to replace air as an oxidant in the blast furnace combustion process. As a result, not only the blast furnace temperature can be increased, but also the carburizing rate can be increased, the formation of steel can be promoted, and the carbon content of the slag can be increased.

2. Petrochemical industry

In the petrochemical production process, oxygen is widely used in the oxidation-reduction reaction, steam reforming and other processes. Redox reaction can convert petroleum and other raw materials into organic compounds and generate heat energy; steam reforming is the reaction of liquid hydrocarbons through heating and steam catalyst to produce hydrogen, carbon monoxide, carbon dioxide and methane.

3. Medical industry

In the medical industry, common application scenarios include ventilators, oxygen inhalation, etc. Among them, the ventilator is a breathing aid that can convert air into oxygen, which can help the human body maintain oxygen content, relieve the symptoms of dyspnea, and improve the quality of life of patients.

3. Current Technical Progress

At present, the industry is constantly developing and innovating oxygen preparation technology, some of which are as follows:

1. High-temperature solid-state oxidation technology

High-temperature solid-state oxidation technology is a new technology currently being developed, which can use the oxygen ion transport and oxygen ion conductivity of solid materials to prepare oxygen.

2. molecular pump mass spectrometry

molecular pump mass spectrometry is a new type of oxygen preparation, it is under high vacuum conditions, through the molecular pump to the air component and oxygen component separation, and the use of mass spectrometry for accurate detection and analysis. The industrial principles and technological progress of

oxygen preparation are becoming more and more diversified and efficient, and continue to provide strong support for the development of industrial production and life and health. With the continuous innovation and improvement of technology, oxygen preparation technology will be more diversified and sustainable.