| 摘要 |
PURPOSE:To prevent the heat radiating loss of a burner connecting part, improve the combustion performance, miniaturize the device and contrive the high performance of the device by a method wherein the burner connecting port of a combustion chamber is covered by a blowoff case, connected to a fan which supplied combustion air, at the opposite side of the injecting direction of combustion gas. CONSTITUTION:The liquid fuel is injected through a nozzle 20 and combustion air is blown into an inner tube 11 by the fan 16 with a high speed through a blower tube 19 whereby the liquid fuel is burnt, however, high-temperature combustion gas collides against the bottom of a combustion tube 6 and is converted into a gas flow path 12 smoothly, thereafter, flows reversely to an opening end 2 of the path 12. Accordingly, the whole surface of the combustion tube 6 is red-heated and heats a water wall 8 effectively by the radiation and conduction of the heat. On the other hand, combustion gas 5, which flows reversely to the opening end 7, is forced to generate convection and heats the water wall 8 near the connecting port 9 of the burner by the convection and conduction of the heat. Even when the vicinity of the burner connecting port 9 becomes high temperature by the combustion gas 5 injected from the tip end of the burner 5 and the combustion gas 5 which flows reversely to the opening end 7, this heat may be utilized for the preheating of combustion air in the blowoff case 18. |
