High purity nitrogen air separation FAQ

Advantages of the nitrogen cycle process of liquid air separation plant

The advantage of using this process design is that the nitrogen cycle compressor and the medium/high/ultra-high pressure product nitrogen press are combined into one machine, eliminating the need to use multiple product nitrogen presses. Due to the high nitrogen to oxygen ratio, a portion of the nitrogen must be extracted from the top of the low pressure tower to make up the nitrogen cycle compressor. This make-up compressor is also combined with the low-pressure/low-pressure product nitrogen pr...

Jul 20, 2023

Interpretation of nitrogen cycle working condition of liquid air separation plant

When the demand for oxygen increases higher than the normal working condition, more liquid oxygen is extracted from the liquid oxygen storage tank, pressurized to the required pressure by the liquid oxygen pump and sent into the main heat exchanger after gasification and reheating, and the liquid oxygen stored in the liquid oxygen storage tank is consumed. At the same time, the flow of low-pressure expander will be reduced, and more cold volume will be recovered by high-pressure nitrogen and the...

Jul 12, 2023

Why is the lowest temperature in the tower of an air separation plant lower than the outlet temperature of the expander

Jul 04, 2023

What factors are related to the operating cycle of air separation equipment

Jun 26, 2023

The principle and characteristics of large air separation plant cryogenic nitrogen production

The principle and characteristics of large air separation cryogenic nitrogen production Nitrogen is the main component of air, accounting for about 78% of air. With the progress of science and technology and economic development, the application of nitrogen is expanding and has penetrated into many industrial sectors and daily life. There are several main methods of producing nitrogen. One of them is cryogenic air separation nitrogen, which is a traditional method of nitrogen production and ha...

Jun 15, 2023

What are the requirements for selecting materials for high purity nitrogen gas distribution pipelines in small air separation unit?

What are the requirements for selecting materials for high purity nitrogen gas distribution pipelines in small air separation unit? High purity nitrogen gas has to be transported through pipelines to the point of use of the small air separation unit. In order to meet the quality requirements of the gas for the process, the selection of materials for the piping system and the quality of construction need to be paid more attention to during the construction process, provided that the gas ...

Jun 07, 2023

According to the different ways in which refrigeration causes low temperatures, the cooling capacity can be divided into three ways

May 30, 2023

Why is there both liquid and gaseous nitrogen at the top of the air separation tower?

Because gas and liquid nitrogen are in a coexisting saturated state and have the same saturation temperature. However, saturated liquid and saturated vapour at the same temperature belong to different states. A saturated vapour gives off heat to condense into a saturated liquid, and when the temperature remains constant, the saturated liquid absorbs heat to evaporate into a saturated vapour. For the sa...

May 22, 2023

Boiling point of oxygen nitrogen mixture in air separation equipment

May 12, 2023

Development scale and application of high purity nitrogen air separation unit

Since the successful development of the first set of high-purity nitrogen air separation unit in China in 1978, the R & D breakthrough of domestic nitrogen production equipment has closely followed the pace of foreign countries, and has achieved leapfrog development in recent decades. At the same time, China's nitrogen production market also shows an upward trend year by year, and the demand for nitrogen p...

May 04, 2023

What is the impact of increasing the amount of processing air in distillation conditions and what measures need to be taken

Apr 23, 2023