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Liquid Oxygen and Nitrogen ASU Plant | China Suppliers and Factory for Fullcryo Cryogenic Air Separation
Product Description
The basic principle of air separation is use cryogenic rectification to condense air into liquid and separate the air according to the evaporation temperature of each component. The two-stage rectification tower simultaneously obtains pure nitrogen and pure oxygen at the top and bottom of the upper tower. It is also possible to take out liquid oxygen and liquid nitrogen from the evaporation side and the condensation side of the main cooling respectively.
The air separation in the rectification tower is divided into two stages, air is separated for the first time in the lower tower to obtain liquid nitrogen and at the same time obtain oxygen-enriched liquid air. The oxygen-enriched liquid air is sent to the upper tower for rectification to obtain pure oxygen and pure nitrogen. The upper tower is divided into two sections: with the liquid-air inlet as the boundary, the upper part is the rectification section, which rectifies the rising gas, recovers the oxygen component, and purifies the nitrogen purity, and the lower section is the stripping section to remove the nitrogen components in the liquid, separated to improve the oxygen purity of the liquid.
Core Function & Advantages
The function of liquid oxygen and liquid nitrogen is to provide a convenient and efficient way to store and transport these gases for a variety of industrial, medical and scientific applications. The liquid forms of these gases are easier to store and transport than their gaseous counterparts, and also enable precise and controlled delivery of the gas to the point of use. This makes liquid oxygen and liquid nitrogen vital to many critical applications across industries.
Liquid Oxygen Applications: Liquid oxygen is used in respiratory support in medical facilities, in industrial processes such as metal cutting and welding, and in the production of chemicals and fuels. It is also used in the aerospace industry for rocket propulsion and in the medical field for cryotherapy and cryopreservation.
Liquid Nitrogen Applications: Liquid nitrogen, on the other hand, has a wide range of applications, including as a coolant for preserving biological samples, in the food industry for freezing and packaging, in the semiconductor industry for cooling during manufacturing processes, and in the medical field for use in cryosurgery and dermatology.
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Frequently Asked Questions (FAQ)
Q1
What is the working principle of the air separation unit?
The basic principle is cryogenic rectification, which condenses air into a liquid state and separates the components based on the differences in their evaporation temperatures.
Q2
How does the two-stage rectification tower process air?
Air is first separated in the lower tower to produce liquid nitrogen and oxygen-enriched liquid air. This liquid air is then fed into the upper tower for secondary rectification to obtain pure oxygen and pure nitrogen.
Q3
What are the functions of the upper tower sections?
The upper rectification section rectifies rising gas, recovers oxygen, and purifies nitrogen. The lower stripping section strips away nitrogen components in the liquid to improve oxygen purity.
Q4
What are the main applications of liquid oxygen?
Liquid oxygen is widely utilized in medical respiratory support, industrial metal cutting and welding, chemical and fuel synthesis, aerospace rocket propulsion, and medical cryotherapy.
Q5
What are the typical uses of liquid nitrogen?
Liquid nitrogen serves as a coolant for biological sample preservation, food freezing and packaging, semiconductor manufacturing cooling, as well as cryosurgery and dermatology in healthcare.
Q6
Why are oxygen and nitrogen preferred in liquid form?
Liquid forms are significantly more compact and convenient to store and transport compared to gaseous states, while enabling precise and controlled delivery to the point of application.