Reliable Flue Gas Filtration for Major Alumina Expansion
Worsley Alumina Refinery – Western Australia
The Project
Worsley Alumina — a joint venture between BHP Billiton, Japan Alumina Associates and Sojitz Alumina — launched a $2.2 billion expansion to increase refinery capacity from 3.5 Mtpa to 4.6 Mtpa.
Additional power and steam were supplied by a new on-site multi-fuel cogeneration boiler, requiring strict compliance with environmental emission limits.
The Challenge
The boiler’s flue gas emissions needed to meet stringent Environmental Protection Act requirements while operating under:
- High gas volumes
- Variable fuel combinations
- Elevated temperatures
- Tight project timelines
A high-efficiency and reliable filtration system was critical.
The Solution
Nederman MikroPul secured the contract via Austrian Energy & Environment on behalf of Griffin Energy.
The solution included:
- 10 custom S-Series Mikro-Pulsaire® bag filter modules
- Long bag technology for high filtration efficiency
- Two-stage inlet design to reduce filter wear
- High-temperature filter media suited to multi-fuel operation
- Full weatherproof penthouse enclosure
- Fully assembled and insulated modules delivered to site
Pre-assembled delivery reduced installation time and simplified integration into the expansion program.
The Results
- Successful commissioning
- Stable, normal pressure drop
- Ongoing compliance with emission limits
- Original filter bags still in service
The system continues to provide reliable, long-term performance, supporting increased refinery capacity while ensuring environmental compliance.