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Extraction Systems
Ever lifted your vacuum cleaner slightly off the floor and hoped it would effectively clean your carpet or floor boards? It doesn’t work that well, does it?
The same applies to your extraction hoods. Suction decreases as a power law function with increasing distance from your emission source.
In the case of goldrooms this is your cells, ovens and furnaces primarily.
Successful extraction of fume or other contaminants depends on the method by which the contaminants reach your extraction point and the critical velocity which is required of the air extracted in order to ‘capture’ and entrain the contamination allowing it to be removed from the environment.
Other considerations include:
- What happens to the entrained contaminants after they are captured?
- Do they need to be treated or contained before releasing the air to the outside environment?
- Are any volatilised and need to be condensed before emitting?
- How does the process affect mechanical reliability of the system
- What are the compliance regulations for the extraction operating with your primary equipment, such as interlocking requirements?
- How large does your capture area need to be?
- What are the impacts of local makeup ventilation?
….. and there are a whole lot more considerations.
An inverted pyramidal extraction hood must work – musn’t it? They’re common!
And the simple answer is they don’t. While being very effective where the ducting connects to the hood, they fail with the scourge of distance around their perimeter.
Cadia’s FEMS extraction technology looks at the equipment, environment and extraction collectively. Standing for Flow Element Modelled Suction, our designs use computational fluid dynamic modelling techniques to ensure that capture velocities and volumes are optimised.
In short Cadia’s extraction designs suck!
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We pride ourselves in forming close working relationships and friendships with our clients. We work with exceptional, reputable companies and government agencies from Australia to places such as Canada, USA, Peru, Indonesia, Ghana, South Africa, Tanzania and others.
