Why does the purity of nitrogen generators used in food processing decrease?

Common in the food industry:

Common range:

• 5Nm³/h
• 10Nm³/h
• 50 Nm³/h
• 100Nm³/h
• 500 Nm³/h

Large-scale food factories can reach:

Above 1000 Nm³/h.

generally:

• 0.5~0.8MPa

Some high-voltage scenarios:

A booster system is required.

General requirements in the food industry:

-40℃ or below.

High-end packaging requirements:

-60℃ or below.

The food industry often focuses on:

Residual oxygen content in packaging.

Common requirements:

• ≤2%
• ≤1%
• ≤0.5%

The most typical application.

include:

• potato chips
• nut
• biscuit
• pastry
• fast food

The role of nitrogen:

• Antioxidant
• Prevent crushing
• Extend shelf life

Coffee oxidizes very easily.

Nitrogen can:

• Prevent aroma from evaporating
• Extend flavor stability

Many specialty coffee companies:

Nitrogen purity of 99.9% or higher is required.

Nitrogen sealing can reduce:

• Oil oxidation
• Acid value increases

Commonly used in:

• Tank protection
• Filling protection

Nitrogen can:

• Inhibit bacterial growth
• Maintain color stability

Commonly used in:

• Ham
• Delicatessen
• chilled meat

Used for:

• Milk powder packaging
• Aseptic delivery
• Tank protection

It requires extremely high cleanliness.

Tea leaves are highly susceptible to moisture absorption and oxidation.

Nitrogen generators for food processing can:

• Preserve aroma
• Extend storage time

A nut factory:

Originally, bottled nitrogen was used.

exist:

• Frequent bottle changes
• Nitrogen is expensive
• Unstable gas supply

After switching to a PSA food nitrogen generation system:

• Nitrogen costs decreased by approximately 50%.
• The oxygen content in the packaging remains stable below 1%.
• Shelf life extended by approximately 30%.

A specialty coffee factory:

The nitrogen purity requirement is 99.9%.

System Configuration:

• oil-free air compressor
• Adsorption dryer
• High-purity PSA nitrogen generator

accomplish:

• The coffee aroma remains stable
• Improved packaging consistency

Common causes:

Oil-containing air compressor

After the oil enters the molecular sieve:

It will cause permanent pollution.

Drying system malfunction

High air moisture content:

The adsorption performance of molecular sieves decreases.

Molecular sieve aging

Normal lifespan:

Approximately 5 to 8 years.

pneumatic valve malfunction

Untimely switching:

This can cause gas leakage.

Gas consumption exceeded design value

Packaging machine instantaneous flow rate is too high:

This leads to fluctuations in purity.

The higher the purity:

• The lower the nitrogen production
• The higher the energy consumption

Therefore, one should not blindly pursue high purity.

Packaging machine speed determines:

Instantaneous gas consumption.

Calculations must be made:

• Peak traffic
• Average flow

Different foods:

The requirements for residual oxygen levels differ.

For example:

• Potato chips: 95%~99%
• Coffee: 99.9%
• Milk powder: 99.99%

Continuous manufacturing enterprises:

suggestion:

• Dual-machine backup
• Automatic switching
• Remote monitoring

In food nitrogen production systems:

The largest energy source is not the nitrogen generator.

Instead:

Air compressor.

generally:

Compressed air energy consumption accounts for more than 80% of the entire system.

Nitrogen purity

The higher the purity:

The greater the air consumption.

air compressor efficiency

Inefficient air compressors:

This will significantly increase operating costs.

Leakage rate

Many factories:

Pipeline leakage exceeds 20%.

Pressure setting

Excessive stress:

It will increase compression power consumption.

Use a variable frequency air compressor

Reduce energy consumption under partial load.

Optimize pipeline design

Reduce pressure drop.

Add gas storage tank

Reduce the frequency of loading.

Regular leak checks

Reduce nitrogen waste.

include:

• pressure
• flow
• purity
• Dew point

A clogged filter can cause:

• Increased pressure drop
• Increased energy consumption

Pneumatic valves are high-frequency operating components.

It wears out easily.

if:

• Purity declines over a long period
• Increased air consumption

The molecular sieve may need to be replaced.

Automatic drain malfunction:

This will cause a large amount of water to enter the system.

The food industry has high requirements for nitrogen systems.

Commonly involved:

For example:

• HACCP
• GMP
• FDA food contact requirements

Frequently referenced:

ISO 8573 Compressed Air Quality Standard.

Key areas of control:

• oil content
• Moisture content
• Particle size

Gas storage tanks and pressure vessels:

It must comply with relevant safety regulations.

With increasing requirements for food preservation:

Demand is gradually increasing at a rate of over 99.99%.

Future systems will adopt more of the following:

• PLC intelligent control
• Remote monitoring
• IoT
• AI predicts maintenance

Reduce compressed air energy consumption:

It has become a key focus of the industry.

More and more companies are adopting:

Skid-mounted integrated system.

convenient:

• Quick installation
• Expansion and Upgrade

The food industry is gradually phasing out conventional oil-injected air compressors.

The demand for oil-free air systems is growing rapidly.

Future development of nitrogen generation technology for food will focus on:

• Low-energy carbon molecular sieves
• High-efficiency airflow control
• AI-powered intelligent purity adjustment
• Remote fault diagnosis
• Ultra-low dew point air treatment
• Integrated intelligent gas supply system

at the same time:

The food industry for:

• Purification
• automation
• stability
• Food safety

The requirements will become increasingly higher.

Nitrogen generators for food processing have gradually evolved from traditional auxiliary equipment into an important basic system in the modern food industry.

For food companies:

A stable, safe, and low-energy nitrogen supply system is not only related to the food preservation effect, but also directly affects:

• Product Quality
• Production efficiency
• Energy costs
• Food safety
• Enterprise competitiveness

In the future, with the upgrading of food packaging and the development of intelligent manufacturing, food nitrogen generators will be used in:

• Food preservation
• Aseptic packaging
• Smart Factory
• Energy saving and consumption reduction

It is playing an increasingly important role in fields suc