In the embodiment shown in FIG 2, the dust free hot low temperature carbonization gases flow on into an annular mixing chamber in which they are mixed with {HEAD ~ the fresh air} supplied through {TAIL ~ the spiral pipe} 68 and from which they are injected into the hot reaction zone of the combustible gas readtor 58 via the nozzle apertures 66 
supplied through
In the embodiment shown in FIG 2 , the dust free hot low temperature carbonization gases flow on into an annular mixing chamber in which they are mixed with { HEAD ~ the fresh air } supplied through { TAIL ~ the spiral pipe } 68 and from which they are injected into the hot reaction zone of the combustible gas readtor 58 via the nozzle apertures 66
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