Liquefied air separation FAQ - DEAR Air Separation

How to make liquid oxygen in small air separation unit？

Small air separation unit is the unit that separates air into oxygen and other gases by first compressing and cooling the air into a liquid state and then using the characteristic that oxygen has a different boiling point to other gases in the air to obtain oxygen and liquid oxygen by evaporation and separation, as well as other rare gases as required.Liquid oxygen is produced using the cryogenic separation of air. The basic principle is to u...

Apr 02, 2025

Cryogenic distillation process of liquid air plant in Nitrogen and Oxygen

After refrigeration, of course, liquid air can be used as the cooling source to provide the condenser with cold quantity to organize the deep cooling air separation process. However, it is difficult to choose heating to reboiler. Most of the commonly known substances are solid state and cannot be used as heat carrier under the condition of deep cooling. Of course, electric heating is not available,...

Mar 17, 2025

Low air compressor efficiency of large air separation unit

Grid frequency or voltage drop Combined with the compressor machine side voltage meter and electrical system background microcomputer found that during the operation of the compressor grid voltage and frequency are not significantly decreased, the external network power supply system is more stable, so the motor and compressor speed is judged to be a constant value. Increase in suction temperature at any level When the suctio...

Mar 07, 2025

Why can the lower tower of the distillation column of a small air separation unit not pump dirty liquid nitrogen?

Oxygen generators are switchable heat exchanger process oxygen generators and molecular sieve pressurised expansion process oxygen generators. The pure liquid nitrogen supplied to the upper tower is less and a stream of dirty liquid nitrogen can be pumped to the upper tower. The oxygen generator of the pressurised expansion process, b...

Feb 27, 2025

Calculation of minimum reflux ratio

The process of stripping is a process of continuous exchange between the high boiling point components in the rising gas and the low boiling point components in the reflux liquid. As a result, the high boiling point components in the rising gas are continuously reduced until the top of the stripping section reaches the gas phase composition of the distillation raw material. Meanwhile, the low boiling point components in the reflux liquid are continuou...

Feb 19, 2025

Minimum gas-liquid ratio in liquid air separation plant

In fact, reflux ratio is a conventional saying. In practical calculation, it is divided into liquid gas ratio in distillation section and gas-liquid ratio in stripping section. The minimum reflux ratio is of course the same. When the number of trays and reflux ratio determine the purity of distillation products, the actual meaning is that the gas-liquid ratio of the stripping section and the number of trays in the stripping section determi...

Feb 11, 2025

Welding process of stainless steel pipe in air separation project

Jan 24, 2025

Test process of stainless steel pipe section of air separation unit

Jan 16, 2025

What requirements and regulations should be met for the assembly of meter tube, cold insulation box and strength and air tightness test before positioning of air separation equipment

Jan 08, 2025

How to determine whether the heating regeneration of molecular sieves in air separation equipment is thorough?

Dec 30, 2024

Test process of stainless steel pipe in air separation unit

Dec 20, 2024

How does the throttling effect of air separation equipment generate refrigeration capacity?