Arca Caldaie ASPIRO DUO TECH, Установка, эксплуатация и обслуживание

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3.12. Pellet burner
Aspiro DUO TECH comes with a supplementary upper door where is screwed a pellet burner.
The burner operation is completely automated, and is controlled by the electronic control panel.
Key:
1 Photo cell 5 Electric sockets for connecting the boiler electronic panel
2 Secondary air stream 6 Primary air stream
3 Resistance 7 Bull's eye
4 Stainless steel grate 8 Pellet inlet
4. OPERATION MODES
ASPIRO DUO TECH boiler is a biomass boiler using wood as fuel, implementing the gasification technology
of wood with reverse flame; the boiler can also use natural wood pellets installing a pellet burner on the front
upper door with completely automated firing and cutting off operation.
4.1. Gasification technology (wood operation)
ASPIRO boiler implements the wood gasification technology. The solid fuel, charged in the upper boiler wood
collecting box, when comes in touch with the hot ember layer on the burner grate, produces combustible
gases which, when mixed with air (primary air stream) can be fired. The combustible mixture of wood gases
and the air passes down through the burner grate toward the bottom part of the combustion chamber (heat
exchanging area), where the typical
“reverse flame” will appear.
The gasification method, not burning wood directly as in any other classic arrangement but using instead the
gases released by wood under high temperature conditions, allows a complete burning of the fuel which
permits to get a high thermal yield and a very low level of harmful emissions in the flue gases released
outside.
ASPIRO boilers have been developed to limit to its maximum extension the damaging effects of the acid
condensation products. The burner chamber has 8 mm thickness walls and no welding in its upper part;
furthermore, the rear and front walls are protected by a refractory cement layer and they are not directly in
touch with water (dry walls).