Combustion burner and pressurized gasification furnace

Abstract

A combustion burner and a pressurized gasification furnace provided with: a burner main body ( 41 ) capable of blowing a fuel gas in which fuel and air are mixed; and an ignition torch ( 42 ) that is provided inside the burner main body ( 41 ) and propagates a flame from the base end part of the torch, with the flame being discharged from the tip end part. By arranging the tip end part ( 42 a ) of the ignition torch ( 42 ) at the base-end side with respect to the tip end part ( 41 a ) of the burner main body ( 41 ), the thermal load at the tip end part of the ignition torch during ignition is reduced, and thus the durability can be improved.

1 . A combustion burner comprising:
 a burner main body which is able to blow fuel gas which is a mixture of fuel and air; and   an ignition torch which is disposed inside the burner main body and allows a flame to propagate from a base end portion of the ignition torch so as to be sent out from a tip end portion of the ignition torch,   wherein the tip end portion of the ignition torch is disposed on the base end portion side with respect to a tip end portion of the burner main body.   
     
     
         2 . The combustion burner according to  claim 1 ,
 wherein, during a non-operation of the ignition torch, the tip end portion of the ignition torch is disposed closer to the base end portion side than the tip end portion of the burner main body.   
     
     
         3 . The combustion burner according to  claim 2 ,
 wherein a time of the non-operation of the ignition torch includes a time before allowing the flame to propagate from the base end portion of the ignition torch to the tip end portion or a time after stopping the propagation of the flame by the ignition torch after an ignition of the fuel gas from the burner main body.   
     
     
         4 . The combustion burner according to  claim 1 ,
 wherein, during an operation of the ignition torch, the tip end portion of the ignition torch is disposed at substantially the same position as that of the tip end portion of the burner main body.   
     
     
         5 . The combustion burner according to  claim 4 ,
 wherein a time of the operation of the ignition torch includes a time when the flame is allowed to propagate from the base end portion of the ignition torch to the tip end portion.   
     
     
         6 . The combustion burner according to  claim 1 ,
 wherein the position of the tip end portion during the non-operation of the ignition torch is set in consideration of a length of a pipe through which the flame propagates.   
     
     
         7 . The combustion burner according to  claim 1 ,
 wherein an ignition unit is provided in the base end portion of the ignition torch, and an on-off valve is provided on a downstream side in a fuel flow direction of the ignition unit.   
     
     
         8 . A pressurized gasification furnace comprising:
 a burner main body which is fixed to a furnace wall and is able to blow fuel gas which is a mixture of fuel and air into a furnace; and   an ignition torch which is fixed to the furnace wall to be disposed inside the burner main body and allows a flame to propagate from a base end portion of the ignition torch so as to be sent out from a tip end portion of the ignition torch,   wherein the tip end portion of the ignition torch is disposed on the base end portion side with respect to a tip end portion of the burner main body.