Liquefied air separation FAQ - DEAR Air Separation

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?