A gasifier for the manufacture of producer gas has a chamber (10) for
the
combustion of material, the chamber (10) being provided with a plurality
of tuyeres (30) for the introduction of combustion air to the chamber. The
tuyeres (30) are disposed at an acute angle to the wall of the chamber (10)
so that air is directed both around and upwardly of the chamber. Each tuyeres (30)
is configured to produce a jet stream wherein the air swirls along the length of
the stream.
