| 摘要 |
The efficiency of a flame generated by a blower burner and running in a combustion tube for an oil-fired central-heating boiler is increased by reshaping the combustion tube into a combustion chamber closed at its free end, which, preferably in the shell area, is equipped with passages, the sum of whose cross-sections is substantially less than the cross-section of the flame or the combustion chamber. The combustion chamber is surrounded by an afterburner chamber, or the passages of the combustion chamber are overlapped by afterburner chambers, which in turn are equipped with outlets, the sum of whose cross-sections exceeds that of the passages. In this way, a pressure potential is achieved in the combustion chamber itself that, together with the high temperature achievable, increases the reaction rate; furthermore, it causes an intensive swirling and mixing of the flame and flue gases when they flow out of the outlets, so that virtually complete combustion occurs in the afterburner chamber(s), even if there is only a very small excess of air. The efficiency thus achievable results in a lowering of fuel consumption, and resultant lowering of pollutant formation, and therefore emission. <IMAGE>
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