Outotec (USA) Inc
Cyclones
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Cyclones have found industrial use for over 100 years. Since then the design and calculation of cyclones have been improved significantly. Cyclones are used to separate particles from a fluid or gas by centrifugal forces. The dust loaded gas stream is fed into the cyclone, where a rotary motion is induced. The solid particles, due to their higher density, are separated to the wall of the cyclone and flow downwards to the solid exit, while the gas leaves the cyclone via the vortex finder. The flow field in a cyclone is highly complex.
Cyclones are an integral part of any circulating (CFB) or bubbling (FB) fluidized bed based process, and a key element for an efficient heat recovery with minimal impacts on product quality The cyclone geometry is critical for the cyclone performance in terms of separation efficiency, pressure drop and particle breakage, and thus by extension, the overall performance of the plant
Outotec has used cyclones in its plants in various applications, such as zinc, copper, alumina, gold ore and pyrite roasters as well as fluidized bed based energy systems. With this wide installation base Outotec developed its own in-house calculation methods based on plant measurements and sampling. Outotec makes use of its existing research and development facilities coupled with onsite measurements to continuously investigate and improve the cyclone design and tailor solutions to the customer’s requirements and to the process needs. This has resulted in several breakthroughs and patents, such as the novel inlet geometry for dealing with sticky particles (ashes, hydrocarbons) to reduce fouling.
Benefits
• High separation efficiency
• Improved heat recovery
• Reduced fines recirculation
• Reduced particle breakage and material wear
• Reduced capital investment costs
• Low maintenance requirement and easy operation
Flexible solutions
• Tailored cyclone design to suit process requirements
• Basic and detailed engineering services
• Cyclone revamps and inspections
- Cyclone design optimization
- Trouble-shooting and operational support
- Dust measurements and sampling
- Refractory inspections
- Engineering services
• Process and cyclone simulations
• Pilot-plant testing facilities
- Stand alone cyclone testing rig
- CFB, FB, AFB, FR pilot rigs in various sizes (50 – 700 mm)
- Fluidization tests
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