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Title:
WATER COOLING TYPE CYCLONE COAL COMBUSTION FURNACE USING COOLING WATER DIFFERENT IN TEMPERATURE LEVEL
Document Type and Number:
Japanese Patent JP01111111
Kind Code:
A
Abstract:

PURPOSE: To make it possible to effect respective functions efficiently by sectioning the inner surface of a combustion furnace in accordance with the functions and by using cooling water different in a temperature level according to each of the functions.

CONSTITUTION: A cooling water system for cooling walls 3W5 and a cooling water system for a cooling wall 6 are separated from each other, and the boiler water of a natural circulation boiler 10 is used as the cooling water for the cooling walls 3W5, while the boiler feed water of the natural circulation boiler 10 is used as the cooling water for the cooling wall 6. The boiler water is at a relatively high temperature and the boiler feed water is at a relatively low temperature, either of them being capable of maintaining a stable temperature. In such a manner, the surface temperature of a refractory 18 is kept to the melting temperature of burnt ashes, and at the same time, the back of the refractory 18 is cooled so as to protect the refractory against corrosion due to the burnt ashes. Further, by a method wherein the temperature of the cooling wall 6 exposed on the inner surface of a combustion furnace 1 is kept low, the burnt ashes are prevented from depositing and accumulating on the refractory, and the exfoliation and detachment of the same are made easier.


Inventors:
Shiraha, Mutsuhiro
Ito, Yukiya
Application Number:
JP1987000266241
Publication Date:
April 27, 1989
Filing Date:
October 23, 1987
Export Citation:
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Assignee:
KAWASAKI HEAVY IND LTD
International Classes:
F23D1/02; F22B31/00; F22B35/00; F23D1/00; F22B31/00; F22B35/00; (IPC1-7): F22B35/00; F23D1/02