Heating apparatus

Combustion – Combustion products return structure

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Details

126 91A, F23J 502

Patent

active

046733485

ABSTRACT:
Oxygen is introduced through oxygen supply line (5) into an annular gallery (6) which it leaves at high velocity through annular channel (7). The outlet of the annular channel (7) is shaped so that, by virtue of the Coanda effect, the oxygen travels towards the downstream end of the burner (1) substantially parallel to the wall of the tubular body (2). Combustion gas from combustion chamber (13) is induced between support bars (4) into the tubular body (2) by the flow of oxygen and mixes with the oxygen and subsequently with natural gas introduced through fuel supply line (8). The mixture burns at the outlet (9) of the fuel supply line (8). The maximum temperature reached by the gas leaving the burner (1) is substantially lower than that which would be obtained by a conventional oxy-fuel flame. The burner may be used in radiant tubes.

REFERENCES:
patent: 3570471 (1971-03-01), Lazaridis
patent: 3920383 (1975-11-01), Kerr
patent: 4401099 (1983-08-01), Collier

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