Fireproof structure and installation method for protecting water pipes

Abstract

A fireproof structure protects water pipes with stable durability even in a high temperature gas environment. Even in a case where it falls off, it does not leave the water pipes suddenly exposed. The fireproof structure for protecting water pipes 25 B installed on water pipe walls of a combustion gas side is configured by a double-layered structure made up of an outer layer water pipe protective structure facing towards the combustion gas side, which is fireproof tile 13, and an inner layer water pipe protective structure provided between the outer layer water pipe protective structure and the water pipes, which is fireproof castable 12. The thickness ratio between the castable 12 and the tiles 13 lies within the range of about 2:1 to 3:1, and the ratio between the thickness of the fireproof castable and the radius of the water pipe is set to 1+α:1, wherein the value of α ranges from approximately 0.1 to 0.3. The water pipes are equipped with hanging hooks 15 a for tiles 13.

1 . A fireproof wall structure of combustion equipment including: 
 a refractory tube wall lining; and    a tube wall which comprises water pipes and water pipe connecting fins joining adjacent ones of the water pipes of the tube wall, said tube wall lining being formed on a combustion gas side of the said tube wall;    wherein said lining comprises two kinds of layers, an inner layer and an outer layer;    wherein said inner layer is formed on a combustion gas side surface of said tube wall and said outer layer is attached on said inner layer;    wherein said inner layer and said outer layer are formed of different material;    wherein said inner layer is formed of material selected from the group consisting of nickel-chrome and nickel base alloy and has been deposited on the combustion gas side of said tube wall by cladding or thermal spraying; and    wherein said outer layer is formed of fireproof castable or fireproof tiles attached on said inner layer.    
   
   
       2 . A stoker type incinerator having said fireproof wall structure of  claim 1  thereon, said stoker type incinerator having a furnace outlet temperature of approximately 900 to 1200° C.  
   
   
       3 . A stoker type incinerator having said fireproof wall structure of  claim 1  thereon, said stoker type incinerator having a furnace outlet temperature of approximately 900 to 1200° C. at an uppermost part of said fireproof wall structure of the incinerator.  
   
   
       4 . A stoker type incinerator having said fireproof wall structure of  claim 1  thereon and having a secondary air inlet provided at a lower part of said fireproof wall structure, wherein the outer layer formed around and below said secondary air inlet is formed of fireproof castable.  
   
   
       5 . A stoker type incinerator having said fireproof wall structure of  claim 1  thereon, wherein said outer layer is formed by fireproof tiles for areas of said fireproof wall structure subject to high heat loads.  
   
   
       6 . A stoker type incinerator having said fireproof wall structure of  claim 1  thereon, wherein said outer layer is formed by fireproof tiles and said fireproof wall structure further comprises hanging members integrated with said tube wall of said fireproof wall structure.