PURPOSE: To prevent any crack and deterioration of a title structure both due to thermal stress by providing a heat insulation member on the surface of a member constituting the title structure, and altering the thickness of the heat insulation member in order to control the amount of heat transferred to a flame holder as needed.
CONSTITUTION: A heat insulation member 8 having a smaller heat conductivity than that of chief members of a flame holder 1 is provided on the surface of a flame holder device end 2 being the surface to be heated and facing the flame. The thickness of the heat insulation member 8 is altered radially and circumferentially according to the distribution of the amount of heat transferred from the flame holding device end 2 to control the amount of heat transferred to the flame holder 1 for uniforming the temperature distribution in the flame holder 1. Simultaneously, the wall thickness of a flame holder body 1 is uniformed with respect to a flame surface so as to uniform the heat capacity of the flame holder 1. Hereby, the surface area for reception of heat is increased. The surface area for reception of heat is thus increased, whereby the density of the transferred heat from the surface to be heated is reduced to uniformhu the temperature distribution in the flame holder 1. Thus, the amount of the heat entering the flame holder 1 is interrupted or reduced without affecting the flame holding performance.
INOUE HIROSHI
MORITOMO YOSHIKAZU
NAKAYAMA YOSHIHARU
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