High purity nitrogen air separation FAQ

Form design of optional components for liquid air separation plants

1. Design of membrane frameThe main skeleton design uses I-beam steel, focusing on neat and solid appearance, including local strengthening design.The design of the main skeleton is made of I-beam steel, mainly focusing on a neat and strong shape, including local strengthening design. The design is mainly based on the selection of some components that are used frequently and are more critical in the liquid air separation plant, including regulators, manual valves, duplexes, needle valves and oth...

Jun 06, 2022

How to start the booster turbine expander for liquid air separation plant?

Steps to start the booster turbine expander for liquid air separation plants. Prepare the booster turbine expander for start-up in accordance with the requirements. The compressed air enters the lower tower in liquid air separation plant. High pressure air pressurised by the booster end of the booster turbine expander in liquid air separation plant, then cooled and throttled by the main heat exchanger into the lower tower; maintaining a lower tower pressure of around 0.35 MPa. The pressuri...

May 12, 2022

What is liquid air separation plant adsorbent？

Liquid air separation plant molecular sieve adsorbers are used to remove impurities such as moisture, carbon dioxide and acetylene from the air by adsorption. The porous solids used in the adsorption process are called adsorbents. The requirements of the adsorbent are mainly the following. 1) The adsorbent must be a porous substance. Adsorption can only be carried out on the surface of the solid, the more voids, the larger the surface area, the stronger the adsorption capacity. 2) The adsorbe...

May 06, 2022

Effective energy analysis of cold energy utilisation in liquid air separation plants

Effective energy analysis is an important analytical method for energy systems. Liquid air separation plant is a low-temperature liquid mixture with methane as the main component, including nitrogen, ethane, propane and other components, which has a large temperature difference and pressure with the outside world. Liquid air separation plants's temperature accompanied by phase change heat, so its cold energy is divided into sensible heat and latent heat. The effective energy analysis shows that ...

Apr 13, 2022

Liquid nitrogen separation system in liquid air separation plants

After pressurisation, it returns to the heat exchanger to recover the cold volume of liquid air separation plants and liquefy it into liquid nitrogen, part of which is warmed up to about 123°C by the heat exchanger through the eighth pipeline after a history of throttling, and is pumped out to the medium pressure circulation nitrogen press. Another part of the liquid nitrogen enters the first gas-liquid separator via the fifth pipe. Part of the separated liquid nitrogen goes through the seco...

Mar 28, 2022

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...

Mar 25, 2022

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 ...

Mar 18, 2022

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 ...

Dec 03, 2021

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