| 摘要 |
PURPOSE:To provide a safe combustion without showing any fear of back-fire as well as to facilitate a removal of adhered unburnt carbon or the like and further to prevent a variation with time at a combustion surface by a method wherein a sandy auxiliary combustion substance, a casing member having an opening at its one side, enclosing the sandy auxiliary combustion substance and having a chamber sandwitching the sandy auxiliary combustion substance at a side opposite to the opening, and an element for supplying mixture of fuel gas and air are provided. CONSTITUTION:A net type sandy auxiliary combustion substance is arranged such that several sandy particles 15 having proper thickness are mounted on a supporting body composed of a wire net 17 having meshes of proper size to be installed on a casing member 3. The casing member 3 is arranged to enclose the sandy auxiliary combustion substance 1 with its part being opened, the surface of the auxiliary combustion substance facing the opening is formed at the combustion surface for the surface combustion, and a mixture gas distributing chamber 2 is formed at a rear surface of the auxiliary combustion substance opposed to the combustion surface. A mixture gas supplying pipe 4 is set in the casing member and communicated with the chamber 2. A mixing element 5 is mounted in the supplying pipe so as to mix the fuel gas with air under a desired ratio. Both combustion gas and the air are supplied to the mixing element 5, they are mixed under the desired ratio, and supplied to the chamber 3, uniformly distributed, supplied to the auxiliary combustion substance 1, passed through a clearance formed by the sandy particles 16 so as to carry out the superior surface combustion.
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