(57) A vertical burner (10) for a domestic heating apparatus (12) fed by granular biomass
fuel such as pellets, olive pulp, maize and suchlike, comprises a support frame (13)
inside which a combustion unit (11) is installed, having inside it a combustion chamber
(25). The combustion unit (11) comprises an internal conveyor body (26) which delimits
the combustion chamber (25) inside it and, outside it, a containing chamber (22) for
the comburent air, wherein the internal conveyor body (26) is made of material with
low heat conductivity and high resistance to temperature, able to maintain, in normal
use, the internal temperature of the chamber (25) at a determinate combustion temperature.
The internal conveyor body (26) is shaped so as to vertically define one or more parts
(28, 30, 32) of the chamber (25), which are shaped with cross sections having predetermined
and different geometry so as to determine an ascent of the combustion fumes upward
at a determinate speed of outflow, so that they have adequate time to remain in the
chamber (25) in order to allow a substantial complete combustion.
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