| 摘要 |
PURPOSE: To heighten the combustion heating temp. in a preheating zone and to improve the productivity of a heating furnace by introducing low temp. combustion exhaust gas after storing the heat of a regenerative type burners in the preheating chamber into high temp. combustion exhaust gas and cooling to less than erosion temp. of an air preheater. CONSTITUTION: A material 6 to be heated is carried into the preheating zone 1, heating zone 2 and soaking zone 3 in order with a carrying device 7 to execute the heating treatment. In the heating furnace 4, plural regenerative type burners 9... are arranged in the pre-heating zone 1. At the time of heating this preheating zone 1, the air preheated through the air preheater 14 arranged in a flue 13 is introduced into e.g. the burners 9a, 9b from an air guide pipe 16 with a block 12a, and the temp. is raised with heat storage bodies 10a, 10b to burn a fuel. The burners 9, 9c suck the combustion exhaust gas in the furnace and regenerate the heat into the heat storage bodies 10, 10c and after storing the heat, the combustion exhaust gas becoming the low temp. is introduced to the flue 13 at the air preheater inlet side with a blower 12 through an exhaust gas guide pipe 11. By this method, the high temp. exhaust gas is cooled and made to be less than the erosion temp. of the metal-made air preheater 14. |
