plasma ignition burner

Abstract

A plasma ignition burner. The plasma ignition burner has at least two stages of burner barrels and a plasma generator for igniting the pulverized coal in a first stage burner barrel of the at least two stages of burner barrels. The burning flame of the former stage burner barrel ignites the pulverized coal in the next stage burner barrel, or further burns with the supplemented air in the next stage burner barrel. The axial direction of said plasma generator is parallel to the direction along which the pulverized-coal-contained air flow enters into the first stage burner barrel and at the same time, parallel to the axis of the burner barrels.

1 . A plasma ignition burner, comprising at least two stages of burner barrels and a plasma generator for igniting the pulverized coal in a first stage burner barrel of said at least two stages of burner barrels, wherein the burning flame of the former stage burner barrel ignites the pulverized coal in the next stage burner barrel, or further burns with the supplemented air in the next stage burner barrel, wherein the axial direction of said plasma generator is parallel to the direction along which the pulverized-coal-contained air flow enters into the first stage burner barrel and at the same time, parallel to the axis of the burner barrels. 
   
   
       2 . The plasma ignition burner according to  claim 1 , further comprising a bending tube for guiding the pulverized-coal-contained air flow into said at least two stages of burner barrels, wherein one end of the bending tube on the side of the burner barrels is parallel to the axis of the burner barrels, and said plasma generator is inserted into the first stage burner barrel through the wall of said bending tube along the axial direction of the burner barrels. 
   
   
       3 . The plasma ignition burner according to  claim 2 , further comprising a guide plate arranged along the axis of the bending tube, wherein one end of the guide plate on the side of the burner barrels is parallel to the axis of the plasma generator. 
   
   
       4 . The plasma ignition burner according to  claim 3 , wherein said guide plate extends to the vicinity of the inlet of the first stage burner barrel. 
   
   
       5 . The plasma ignition burner according to  claim 4 , wherein the ends of said plasma generator and said guide plate are arranged on the axis of the burner barrels, or deflected form the axis of the burner barrels for a predetermined distance. 
   
   
       6 . The plasma ignition burner according to  claim 3 , wherein the shape of the section plane of said guide plate is planar. 
   
   
       7 . The plasma ignition burner according to  claim 3 , wherein the shape of the section plane of said guide is bending surface. 
   
   
       8 . The plasma ignition burner according to  claim 2 , wherein an anti-abrasion protecting sleeve is provided to protect said plasma generator. 
   
   
       9 . The plasma ignition burner according to  claim 8 , wherein the windward surface of said anti-abrasion protecting sleeve is V-shaped.