Small air separation FAQ - DEAR Air Separation

What kinds of water cooling towers are available for small air separation unit？

The structure of the water cooling tower selected for air separation equipment has the following broad types. Sieve plate tower. Tower plate using aperture and hole spacing of the larger shower drop tower plate. Nitrogen and water are from the sieve hole through. As the water cooling tower is not working continuously and steadily, the cooling effect is not ideal, so it is no longer used. Cyclone plat...

Dec 08, 2021

Principle, prime movers and attachments of centrifugal compressors for small air separation unit

Centrifugal compressor is a kind of turbine compressor, with more characteristics such as handling gas volume, small size, simple structure, smooth operation, easy maintenance and gas is not oil pollution, can be used in the form of drive. Centrifugal compressor principle of operation, the main goal of increasing gas pressure is to increase the number of gas molecules per unit volume, that is, to s...

Dec 07, 2021

What are the requirements for strength and airtightness tests before the small air separation unit is put in place?

Small air separation unit in place before the strength test and gas-tightness test provisions. First, if the manufacturer has made strength test and has a certificate of conformity of the pressurized equipment, it may not be strength test only gas tightness test, but if the small air separation unit is found to have traces of damage or a site has been partially mo...

Dec 07, 2021

How to test the piping systems pressure of small air separation unit?

Pressure testing ofsmall air separation unit and piping systems requires pressure testing in different sections, divided into two sections: inside the cold box and outside the cold box. Pressure test of the internal piping of the cold box: the system is tested by air pressure and the medium is dry, oil-free air. The test must be carried out by a dedicated partition responsible for strictly and carefully check...

Dec 06, 2021

What issues should be noted during the operation of the molecular sieve purification system for small air separation unit?

When operating the molecular sieve purification system: pay attention to the installation requirements of the molecular sieve absorber, when the molecular sieve absorber is running, when the working state of the refrigerator, when the air compressor starts, when thesmall air separation unit is parked, pay attention to the working state of each piece of equipment. 1...

Dec 06, 2021

What are the benefits of 4-5% argon fraction be used as distillation feedstock in the small air separation unit?

First of all, it completely conforms to the general principle of distillation organization and simplifies the organization of air separation distillation. Secondly, after the air separation distillation is organized in this way, the argon component in the air is almost completely in the oxygen argon mixture at the bottom of the air separation column, which is greatly conducive to the improvement of nitrogen ...

Dec 02, 2021

The amount of carbon dioxide with a small air separation unit

The volume fraction of carbon dioxide in air is generally around 0.03%, if the air compressor compresses the air to 0.62 MPa, the partial pressure of carbon dioxide can be calculated as 186 Pa. At the temperature when the air enters the air separation device, the saturated vapor pressure of carbon dioxide is much higher than the partial pressure of carbon dioxide, so carbon dioxide is in an unsaturated state, and carbon dioxi...

Dec 01, 2021

Why does the temperature of gas throttling in small air separation unit decrease？

In the small air separation unit, when gas or liquid flows through a shrinkage hole or valve in the pipeline, the flow will be hindered, and the fluid will produce vortex collision, friction and other resistance at the shrinkage hole or valve. In order to flow through the shrinkage hole or valve, the resistance must be overcome, showing that there is a pressure difference before and after the shrinkage hole...

Nov 30, 2021

Harm of liquid drop in small air separation unit turbo expander

If the air temperature in the small air separation unit expander is lower than the liquefaction temperature corresponding to the local pressure, part of the gas will liquefy and droplets will appear in the expander. However, the rotating speed of the working wheel of the turbo expander is very high, and the droplet impact on the impeller will cause the impeller surface wear. The droplets may also be thrown to the gap ...

Nov 29, 2021

Energy consumption of two column process in small air separation units

Air separation unit not only has the distillation and separation process of air under the condition of deep cooling, but also the process of keeping the air separation unit in the deep cold state and making the cryogenic liquid products. Therefore, in addition to distillation process, air separation unit has a very important refrigeration process. Unlike the general refrigeration process of heat pump, the refrigeration prin...

Nov 26, 2021

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