Burner, reaction furnace such as gasification furnace including the burner, and power plant including the reaction furnace

Abstract

A burner for a reaction furnace ( 12 ) including a fuel tube ( 2 ), an oxidizer tube ( 3 ) covering an outer periphery of the fuel tube, and a displacement absorbing member ( 7 ) provided on at least a part of the oxidizer tube. The fuel tube and the oxidizer tube have a proximal end fixed to a side wall of the reaction furnace and penetrating an outer vessel ( 11 ). The oxidizer tube is positioned with respect to the side wall of the inner vessel to suppress a length of a distal end of each of the oxidizer tube and the fuel tube projecting to an inside of the gasification furnace ( 10 ). Thermal stretching in an axial direction of the oxidizer tube is absorbed by the displacement absorbing member attached to the oxidizer tube.

1 - 4 . (canceled) 
     
     
         5 . A burner for a reaction furnace, comprising:
 a fuel tube;   an oxidizer tube through which an oxidizer is guided to a space formed with an outer surface of the fuel tube, the oxidizer tube covering an outer periphery of the fuel tube; and   a displacement absorbing member provided to at least a part in an extending direction of the oxidizer tube, wherein   the oxidizer tube is fixed to a seal box provided at a side wall of an inner vessel, and penetrates an outer vessel and extends from the side wall of the inner vessel toward an outside,   an overall length of a burner for a reaction furnace including the fuel tube and the oxidizer tube is determined depending on a stress generated in the fuel tube, and   the oxidizer tube is positioned with respect to the side wall of the inner vessel to suppress a length of a distal end projecting to an inside of the reaction furnace, and the displacement absorbing member attached to the oxidizer tube absorbs thermal stretching in an axial direction of the oxidizer tube, the thermal stretching occurring in a space between a positioning portion of the side wall of the inner vessel and a furnace outer fixed portion.   
     
     
         6 . A reaction furnace comprising the burner according to  claim 5 . 
     
     
         7 . A power plant comprising the reaction furnace according to  claim 6 . 
     
     
         8 . A method for fixing a burner for a reaction furnace, the burner for the reaction furnace comprising:
 a fuel tube;   an oxidizer tube through which an oxidizer is guided to a space formed with an outer surface of the fuel tube, the oxidizer tube covering an outer periphery of the fuel tube; and   a displacement absorbing member provided to at least a part in an extending direction of the oxidizer tube, wherein   the oxidizer tube has a proximal end fixed to a seal box provided at a side wall of an inner vessel of the reaction furnace,   the method comprising:   determining an overall length of the burner for a reaction furnace depending on a stress generated in the fuel tube;   positioning the oxidizer tube with respect to the side wall of the inner vessel to suppress a length of a distal end projecting to an inside of the reaction furnace; and   absorbing, by the displacement absorbing member attached to the oxidizer tube, thermal stretching in an axial direction of the oxidizer tube, the thermal stretching occurring in a space between a positioning portion of the side wall of the inner vessel and a furnace outer fixed portion.