High purity nitrogen air separation FAQ

Liquid nitrogen pressurization process

The liquid oxygen from the main condensing evaporator is compressed by the internal compressed oxygen pump, evaporated and reheated into the main heat exchanger and then out of the cold box as oxygen product. The low-pressure nitrogen is pumped out from the top of the low-pressure tower, and its cooling capacity is transferred to the reflux liquid in the subcooler, which is sent out of the cold box through the main heat exchanger, partially compressed by the first stage of the nitrogen make-up c...

Jun 06, 2024

How do liquid air separation plants achieve low energy consumption?

Liquid air separation plants by pumping dirty liquid nitrogen through the lower tower, lean liquid air, so that the liquid air separation plants does not reduce the extraction rate due to the liquefaction of part of the raw material air by pumping dirty liquid nitrogen through the lower tower. Liquid lean air allows the air separation plant not to reduce the extraction rate due to the liquefaction of part of the raw material air. The raw material air is liquefied in the liquefier to recover the ...

May 21, 2024

Principle and characteristics of nitrogen production by molecular sieve small air separation unit

Nitrogen is a colourless, odourless, non-toxic and non-flammable gas at room temperature and atmospheric pressure, which is chemically stable and hardly reacts with other substances. Nitrogen is often used as a protective gas in a wide range of industries. There are several main methods of producing nitrogen. One of these is molecular sieve nitrogen in air (variable pressure adsorption), which is ...

May 13, 2024

What are the operating procedures for starting the expansion machine of the air separation equipment?

May 06, 2024

According to the different ways in which refrigeration causes low temperatures, what are the three types of refrigeration capacity of air separation equipment?

Apr 24, 2024

The principle of liquid air separation plant air compressor

After the air compressor compressed and pre-cooled air, and then by the purification system to remove water, carbon dioxide and other harmful impurities, into the main heat exchanger cooling part directly into the lower part of the distillation tower. Another part of the liquefier in the liquefied also into the lower tower of liquid air separation plant, in the lower tower in the initial distillation, in turn to obtain high purity nitrogen with liquid nitrogen, dirty liquid nitrogen, poor liquid...

Apr 16, 2024

What is the task of an air plant purification system?

Apr 08, 2024

Liquid Air Separation Plant Nitrogen Circulation Pressurization Products

Oxygen product: liquid oxygen is pumped out from the lower tower plate of the low pressure tower and sent to the storage tank, the inner compressed oxygen pump is placed next to the liquid oxygen storage tank, the liquid oxygen extracted from the storage tank is pressurized by the oxygen pump and sent out after gasification and reheating in the main heat exchanger to get the required oxygen product in liquid air separation plant. The nitrogen product is pumped from the top of the pressure tower...

Mar 28, 2024

Why does return dirty nitrogen carry away the frozen water and carbon dioxide?

As the air passes through the accumulator or the switching heat exchanger, water and carbon dioxide precipitate out and freeze on the packing of the accumulator or on the fins of the switching heat exchanger, and the return flow of dirty nitrogen takes away the deposited water and carbon dioxide when it passes through. The dirty nitrogen from the upper tower of the distillation column contains essent...

Mar 20, 2024

What are the main functions, working principles, and processes of the pre cooling system for air separation equipment?

Mar 12, 2024

The method of nitrogen production in cryogenic air separation equipment

Mar 04, 2024

What is nitrogen used for from air separation perspective？

The molecular structure of nitrogen is so stable that it is usually very difficult to react chemically with other substances and shows great inertness, so it is often used as a protective gas in industry. Nitrogen-filled storage of fruits and vegetables is an advanced method of storage and preservation, which allows fruits and vegetables to slow down their metabolism in an environment of high nitrogen and low oxygen, and to e...

Feb 23, 2024