600 Nm³/min Compressed Air Station for Cold Rolling
Project Background
A metal products manufacturer in East China commissioned a new cold rolling line and required a dedicated compressed air station to supply process and instrument air across the facility. The station had to deliver oil-free, deeply dried air at a stable pressure, operate efficiently across a wide load range, and leave room for future line expansion.
Station Configuration
SIND equipment was supplied for a station with a design total capacity of 600 Nm³/min at 8 barg, built around an efficient base-load-plus-trim architecture:
| System | Configuration | Notes |
|---|---|---|
| Centrifugal compressors | 4 × 150 Nm³/min | Oil-free, 0.8 MPaG discharge, 10 kV / 1,100 kW, soft starter |
| Screw compressors | 2 × 62 Nm³/min | Permanent-magnet VFD, trim / standby duty |
| Drying — main | 4 × 230 Nm³/min | Zero-air-loss compression-heat adsorption dryers + pre/post filters |
| Drying — auxiliary | 2 × 65 Nm³/min | Micro-heat adsorption dryers |
| Central control | 1 × EPC3000 cabinet | Centralised control of the complete station |
| Air receivers | 5 × 20 m³ | Buffer storage for stable pressure |
Design Highlights
Efficient Load-Following
Centrifugal machines carry the base load at peak efficiency while permanent-magnet VFD screw units trim demand fluctuations — keeping specific energy low across the full operating range.
Zero-Air-Loss Drying
Compression-heat regeneration dryers eliminate purge-air losses of conventional dryers, saving energy while delivering deeply dried air.
Centralised Control
The EPC3000 control layer sequences all machines and dryers as one system, balancing run hours and maintaining constant network pressure.
Redundancy and Expansion
The 4+2 configuration provides N+1 security for the cold rolling process, and station layout reserves space and capacity headroom for future lines.
Supply and Commissioning
Scope covered equipment supply, installation supervision, commissioning and operator training.
Oil-Free Assurance
Oil-free centrifugal compression plus precision filtration protects cold rolling instrumentation and finished surface quality.
Discuss a Similar Project
Contact SINDFigures as reported by the site after commissioning; client anonymised. CO₂ savings calculated at 0.5703 kg CO₂/kWh (China 2022 grid average).