Hengao Deyi analyzed the principle of nitrogen generator nitrogen generator system

Hengao Deyi analyzed the principle of nitrogen generator nitrogen generator system

Nitrogen generator is an advanced gas separation technology, which uses high-quality imported carbon molecular sieve (CMS) as adsorbent and uses pressure swing adsorption principle (PSA) at normal temperature to separate air to produce high-purity nitrogen.

Scope of application

Pressure swing adsorption air separation nitrogen production (referred to as PSA nitrogen production) is an advanced gas separation technology that uses high-quality imported carbon molecular sieve (CMS) as adsorbent and uses pressure swing adsorption principle (PSA) at normal temperature to separate air to produce high purity Of nitrogen.

application:

LCMS (liquid chromatography)

GC (gas chromatography)

Industry (food, electronics, chemical, etc.)

Principle of Nitrogen Generator System

Oxygen and nitrogen gas molecules have different diffusion rates on the surface of the molecular sieve. Gas molecules with a smaller diameter (O2) have a faster diffusion rate, and more enter the pores of the carbon molecular sieve. Gas molecules with a larger diameter (N2) have a diffusion rate. Slower, less pores into the carbon molecular sieve. This selective adsorption difference between nitrogen and oxygen using carbon molecular sieves results in a short period of time when oxygen is enriched in the adsorption phase and nitrogen is enriched in the gas phase. In this way, the oxygen and nitrogen are separated and the gas-phase enrichment nitrogen is obtained under PSA conditions.

Nitrogen generator

The difference curve of carbon molecular sieve's adsorption amount of oxygen and nitrogen under different pressure in a certain time:

After a period of time, the molecular sieve adsorbs oxygen to reach equilibrium. According to the different characteristics of the carbon molecular sieve under different pressures to adsorb the adsorbed gas, reducing the pressure causes the carbon molecular sieve to release the oxygen adsorption. This process is regeneration. According to the different regeneration pressure, it can be divided into vacuum regeneration and normal pressure regeneration. Atmospheric pressure regeneration is conducive to the thorough regeneration of molecular sieve, easy to obtain high-purity gas.

High purity nitrogen generator

Pressure swing adsorption nitrogen generator (referred to as PSA nitrogen generator) is a nitrogen generation equipment designed and manufactured according to pressure swing adsorption technology. Usually two adsorption towers are connected in parallel, and the automatic control system strictly controls the timing according to a specific programmable sequence, alternately pressurized adsorption and decompression regeneration, complete the separation of nitrogen and oxygen, and obtain the required high purity nitrogen.

Excellent performance of dynamic adsorption capacity and separation coefficient of carbon molecular sieve (CMS)

Nitrogen generator

Nitrogen generator

Inferiority determines the quality of the nitrogen generator

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