| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance durability while maintaining advantages, such as low NOx emissions and space savings, of a tube bank structure boiler, and to reduce the amount of emission of CO. <P>SOLUTION: In the tube bank structure boiler, a plurality of heat-transfer tubes 1 for a heat-transfer tube wall, which are elongated in a vertical direction, are laid out in a line toward a rear side from a front side on the right and left lateral surfaces of a storage water heater body; a fin 4 for the heat-transfer tube wall is provided between the adjacent heat-transfer tubes 1, so as to form the heat-transfer tube walls 8 in two rows; a space sandwiched between the heat-transfer tube walls 8 serves as a combustion gas flow space 7; and a heat-transfer tube bank, which is composed of many heat-transfer tubes for the heat-transfer tube bank, elongated in the vertical direction, is provided in the combustion gas flow space 7 to make combustion gas flow in the direction of crossing the heat-transfer tube in the combustion gas flow space 7, the heat-transfer tube bank and the heat-transfer tube wall are divided into an upstream area in which the combustion gas up to about 1,000°C flows and a downstream section with respect to the upstream area, so that an arrangement pitch of the heat-transfer tubes 1 can be set lower in the upstream area than in the downstream section. <P>COPYRIGHT: (C)2012,JPO&INPIT |
