Metal Smelting

Overview of VPSA Oxygen System Upgrade Project

A large copper smelting company in Jiangxi, China implemented an energy-saving upgrade of its VPSA (Vacuum Pressure Swing Adsorption) oxygen generation system to improve efficiency, reduce maintenance costs, and stabilize oxygen supply.

The plant requires a continuous oxygen supply for its oxygen-enriched smelting process, with a daily demand of approximately 150 tons of oxygen at a purity level of 90%–93%.

The original system, installed in 2008, relied on conventional Roots blowers and vacuum pumps, which led to increasing operational challenges over time.

Challenges of Traditional VPSA Oxygen Systems

High Energy Consumption

Due to equipment aging and low efficiency, the system consumed up to:
0.45 kWh/Nm³, significantly increasing operating costs.

Frequent Maintenance Requirements

Gearboxes and bearings required overhaul every 6 months
Annual maintenance cost exceeded RMB 800,000

Excessive Noise Levels

Noise reached 95 dB, exceeding environmental standards
Caused complaints from surrounding communities

Unstable Oxygen Supply

Frequent equipment failures
Affected continuous smelting production

Magnetic Bearing Technology Upgrade Solution

To solve these issues, the company upgraded its VPSA oxygen plant by replacing conventional equipment with:

Magnetic bearing high-speed centrifugal blowers
Magnetic bearing turbine vacuum pumps
Smart control system with cloud monitoring

System Configuration Comparison

Component	Conventional System	Upgraded System
Air Blower	Roots blower (315 kW ×2)	Magnetic bearing blower (280 kW ×2)
Vacuum Pump	Roots vacuum pump (250 kW ×2)	Magnetic turbine vacuum pump (220 kW ×2)
Control System	Local PLC	Intelligent cloud-based system
Footprint	120 m²	70 m²

Key Benefits of Magnetic Bearing VPSA Oxygen System

1. Energy Efficiency Improvement

After the upgrade:

Energy consumption reduced from 0.45 to 0.36 kWh/Nm³
Achieved 20% energy savings

Annual performance:

Operating hours: 8,000 hours
Electricity savings: 3.3 million kWh/year
Cost savings: approx. RMB 2.3 million annually

2. Low Maintenance and Oil-Free Operation

Magnetic bearing technology eliminates mechanical friction:

No lubrication oil required
No gearbox or mechanical wear
Maintenance cost reduced by over 90%

Annual maintenance cost:
From RMB 800,000 → less than RMB 50,000

3. Low Noise and Environmental Compliance

Noise reduced from 95 dB to below 75 dB
Meets industrial environmental standards
Improves working conditions and eliminates complaints

4. Intelligent Control and Stable Operation

Real-time monitoring of oxygen purity, pressure, and flow rate
Automatic speed adjustment for optimal performance
Pressure fluctuation controlled within ±1%

Remote monitoring and diagnostics:

Cloud-based system with remote access
Fault response time reduced from 8 hours to within 1 hour

Return on Investment (ROI)

Metric	Value
Total Investment	RMB 5.8 million
Annual Savings	RMB 3.05 million
Payback Period	1.9 years
Equipment Lifetime	Up to 20 years

Why Choose Magnetic Bearing VPSA Oxygen Systems?

Compared with traditional Roots blower systems, magnetic bearing technology offers:

Higher energy efficiency
Lower operational costs
Oil-free and maintenance-free operation
Lower noise levels
Improved system reliability

Applications of VPSA Oxygen Generation Systems

Magnetic bearing VPSA oxygen systems are widely used in:

Copper and nonferrous metal smelting
Steel industry oxygen enrichment
Chemical processing plants
Pulp and paper industry
Food and aquatic processing

Conclusion

This project demonstrates that upgrading to a magnetic bearing VPSA oxygen system is an effective solution for industrial users seeking:

Reduced energy consumption
Lower maintenance costs
Stable oxygen supply
Long-term operational reliability

Get a Customized VPSA Oxygen Solution

Looking to upgrade your oxygen generation system?