FAQ

A The role of nitrogen generators in laser cutting primarily includes the following aspects:
 
1. Preventing oxidation and improving cutting quality  
   As an inert gas, nitrogen can create an oxygen-free environment in the cutting area, preventing metal materials from reacting with oxygen at high temperatures and avoiding the formation of oxide layers, burrs, or discoloration on the cut surface.
 
2. Assisting in blowing away and removing molten slag  
   High-pressure nitrogen can quickly blow away molten metal and residues from the cutting area, reducing slag adhesion and ensuring a clean cutting seam, thereby improving cutting precision and efficiency. Additionally, it reduces particle interference along the laser beam path, preventing laser distortion.
 
3. Protection of Laser Equipment*  
   Nitrogen is used to purge the optical head, lenses, and optical path of the laser cutting machine, removing dust and contaminants to prevent damage to optical components caused by high temperatures or contamination, significantly extending equipment lifespan.
 
4. Enhancement of Cutting Efficiency*  
   Nitrogen's high thermal conductivity rapidly dissipates heat from the cutting area, accelerating the cutting process.
 

A The role of nitrogen generators in the food industry is primarily reflected in the following areas:

1. Preservation and extended shelf life: Nitrogen-filled packaging inhibits microbial growth and oxidation reactions, thereby extending the shelf life of foods such as potato chips, meat products, and seafood.

2. Maintaining quality and color: Prevents color changes, texture alterations, and nutrient loss caused by oxidation, while preserving natural color.

3. Processing and packaging optimization: Controlling the gas environment in baking and fried foods to improve texture; utilizing liquid nitrogen for rapid freezing or maintaining low temperatures in cold chain logistics to reduce quality loss.

4. Food safety: Using nitrogen as an inert gas in sterile packaging to reduce bacterial growth; employing nitrogen purging during food washing processes to enhance hygiene and safety.

5. Economic and environmental benefits: Replacing traditional liquid nitrogen or bottled nitrogen gas reduces transportation costs and storage space while minimizing energy consumption and environmental pollution.
In summary, nitrogen generators ensure food quality, extend shelf life, and enhance production efficiency through technological means, making them indispensable key equipment in the food industry.

A

Whether the cost and price of PSA nitrogen generators are high depends on specific requirements:

The initial investment is high, but operating costs are low, making them suitable for medium-scale applications with high purity requirements.

Prices vary greatly, so it is necessary to select based on purity, gas production volume, configuration, and application scenario.

They offer a clear cost-performance advantage, especially in small- and medium-scale applications and low-flow requirements, with long-term economic efficiency superior to cryogenic methods and liquid nitrogen.

A Pressure Swing Adsorption (PSA) Technology

Adsorption Agent and Separation Mechanism:
PSA nitrogen generators use carbon molecular sieves (CMS) as the adsorption agent. Carbon molecular sieves have different adsorption capacities for oxygen (O₂) and nitrogen (N₂). Since oxygen molecules are smaller and have faster diffusion rates, they are adsorbed preferentially, while nitrogen molecules are larger and have slower diffusion rates, leading to their enrichment in the adsorption bed layer.
 
Operational Process:
Compression and Pre-Treatment: Air is compressed by a compressor, then passed through a filter to remove moisture, oil mist, and impurities, ensuring the gas entering the adsorption tower is pure.
 
Adsorption Stage: Under high pressure, air enters the adsorption tower, where oxygen is adsorbed by the carbon molecular sieves, and the unadsorbed nitrogen enters the nitrogen storage tank.
 
Regeneration Stage: After the adsorption tower becomes saturated, the adsorbed oxygen is released through pressure reduction, regenerating the carbon molecular sieve and preparing it for the next adsorption cycle.
Alternating Operation: Typically equipped with two adsorption towers, while one tower is adsorbing to produce nitrogen, the other tower undergoes desorption regeneration. Pneumatic valves are precisely controlled via a PLC program controller to achieve continuous production.
 
Compact structure, high degree of automation.

A

A Purity: 95%-99.9995%