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Title:
COMBUSTION MELTING FURNACE AND OPERATION METHOD OF COMBUSTION MELTING FURNACE
Document Type and Number:
Japanese Patent JP2008032345
Kind Code:
A
Abstract:

To provide a combustion melting furnace, making achievement of long-term stable operation of the combustion melting furnace and restraint of melting loss speed of refractory material of a wall surface of a combustion chamber compatible with each other by relaxing factors in instability due to a change in thermal load of the combustion chamber of the combustion melting furnace.

In this combustion melting furnace, a heat exchanger for recovering calorie from combustion gas is installed in an exhaust gas flue for discharging combustion gas, which is generated by burning fuel particles in the combustion chamber of the combustion melting furnace, from the combustion chamber. A first air pipeline for supplying combustion air to the combustion chamber is provided with a branch air pipeline branching from the first air pipeline, a part of the branch air pipeline is disposed as a heat transfer pipe in the heat exchanger, and the branch air pipeline for letting the combustion air heated by heat exchange in the heat exchanger flow down is disposed to communicate with the first air pipeline. The heated combustion air flowing down through the first branch air pipeline and the low-temperature combustion air flowing down through the first air pipeline are mixed, and the combustion air, the temperature of which is adjusted to a desired temperature range by mixing, is supplied through the first air pipeline to the combustion chamber.


Inventors:
KOBAYASHI MINORU
SHIBATA TSUTOMU
OKAZAKI TERUYUKI
Application Number:
JP2006000208139
Publication Date:
February 14, 2008
Filing Date:
July 31, 2006
Export Citation:
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Assignee:
HITACHI LTD
International Classes:
F23G5/50; F23G5/00; F23G5/44; F23G5/46; F23L15/00
Attorney, Agent or Firm:
Polaire Patent Service Corporation



 
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