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Analysis of Molecular Sieve Oxygen Generators

Release Date:

2023-04-10

Source:

Network

Molecular sieve oxygen generators typically employ the pressure swing adsorption–pressure release (PSA) process, with two adsorption towers undergoing identical cyclic operations to ensure continuous gas supply. The entire system is fully automated and controlled by a microcontroller.

Classification of molecular sieve oxygen concentrators: household‑type molecular sieve oxygen concentrators and medical‑grade molecular sieve oxygen generators.

Working principle of molecular sieve oxygen concentrators:

The process employs two towers. Raw air is pressurized by a compressor, then passed through an air‑preparation unit to remove oil, particulate contaminants, and moisture, after which it is cooled to ambient temperature. The treated compressed air enters an adsorption tower packed with molecular sieves via the inlet valve; nitrogen, carbon dioxide, and other impurities are adsorbed, leaving a stream of high‑purity oxygen. When the adsorption tower reaches a specified level of saturation, the inlet valve closes and the purge valve opens, initiating the purge phase. Subsequently, the purge valve closes and the desorption valve opens, commencing the desorption‑regeneration stage, thereby completing one cycle.

Main technical parameters of molecular sieve oxygen concentrators:

1. Normal operating conditions of the equipment

Ambient temperature: 5°C to 40°C

Power supply voltage: Oxygen concentrator host 220V ± 22V; air compressor and oxygen compressor 380V ± 38V.

Power supply frequency: 50 Hz ± 1 Hz

Power: 37 kW

Relative humidity: ≤80%

Atmospheric pressure: 86 kPa to 106 kPa

Host dimensions (L×W×H, excluding the air compressor): 3.5 m × 1.8 m × 2.7 m

2. Physicochemical specifications of the oxygen produced by the equipment

Oxygen production capacity: 20 m³/h

Oxygen concentration: ≥90% (v/v)

Moisture content: ≤0.07 g/m³

Carbon dioxide content: ≤0.01% (v/v)

The carbon monoxide content shall comply with YY/T 0298.

The content of gaseous acids and bases shall comply with YY/T 0298.

The concentrations of ozone and other gaseous oxides shall comply with YY/T 0298.

Particle size of solid matter: ≤10 μm

Solid matter content: ≤0.5 mg/m³

Advantages of molecular sieve oxygen concentrators:

Principle: Using zeolite molecular sieves and pressure swing adsorption (PSA) technology, oxygen is separated from nitrogen in the air, while harmful impurities are removed, thereby producing high-purity oxygen that meets medical‑grade standards.

Low-cost oxygen production: Uses air as the feedstock, requires no additives, generates no residues or pollutant emissions, and consumes minimal electricity.

Convenient to use: Simply plug it in to generate oxygen; operation is straightforward, with stable oxygen concentration and adjustable flow rate. It produces oxygen on demand and can provide continuous supply for up to 24 hours.

Reliability: The entire gas‑path system is a low‑pressure, programmably controlled setup, offering stable performance and low noise.

Keywords:

Analysis of Molecular Sieve Oxygen Generators

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Under what circumstances can molecular sieves be selected as adsorbents?