Alternative Energy Systems
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LoCAF System Components
The Thermal Dynamix LoCAF(c) system consists of ten elements:
- A fuel preparation and feed mechanism, which controls the rate at which fuel is fed to the firing chamber. This is a hopper or bin located ahead of a screw type feed mechanism which both prepares the fuel and precisely meters it into the primary combustion chamber. The design of the screw feeder and hopper depends upon the fuel to be fired.
- A heavily insulated, refractory lined, rotary kiln in which the primary combustion takes place at about 1,500F. The tumbling of the fuel, along with under-fire combustion air, enables very stable and very complete combustion.
- An igniter (which is normally used only during start-up). As soon as stable combustion is achieved this igniter is shut off.
- An ash removal system to remove ash from the primary combustion chamber.
- A secondary oxidation chamber where all the volatile gasses produced in the primary chamber are mixed with air and burned at about 2,500F. The design of this chamber provides for maximum retention of the hot gasses in an extremely turbulent environment. This turbulence promotes the rapid settling of particulate matter and contributes to the cleaning of the exhaust gas.
- A heat recovery unit, usually a boiler or heat exchanger, which is designed for maximum heat recovery. This allows the lowest possible flue gas temperature.
- A finishing unit where, if necessary, a baghouse or scrubber is located. The equipment required here is dependent upon the fuel being fired. Not all fuels require scrubbing and the secondary combustion chamber is so efficient and runs at a high enough temperature to completely combust or oxidize any fuel component introduced to it.
- An induced draft exhaust fan which provides more control in maintaining combustion temperatures and allows a lower exhaust gas temperature.
- A stack or "chimney".
- Controls. These are comprehensive, solid state process controls which allow the complete monitoring and adjustment of all system elements and parameters.
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