Pulverized coal combination burner

Abstract

Disclosed is a burner for oxidant gasification of pulverized fuels under high pressures of e.g. 80 bar (8 MPa) and temperatures of e.g. 1200 to 1900° C. in reactors with liquid slag removal for oxygen gasification, the individual pulverized fuel supply tubes in the burner are designed such that, while retaining the entry cross-sectional area of the tube, the cross-section makes a systematic transition to a curved rectangular duct matched to the annulus. This means that fuel feeding ends immediately adjacent to the oxidant duct, and the flow rate provided in the feeding element is maintained up to the outlet, thereby ensuring trouble-free flow of the pulverized fuel and reducing the amount of inert gas required for purging the feeding element in the non-operational state.

1 - 5 . (canceled) 
   
   
       6 . A burner for oxidant gasification of pulverized fuels, comprising
 a centrally arranged pilot burner section;   an annular duct that supplies the oxidant arranged coaxially with the centrally arranged pilot burner section;   an annulus concentrically arranged around the annular duct that incorporates a plurality of pulverized fuel feeding elements, wherein the individual pulverized fuel feeding elements, while retaining the entry cross-sectional area of the tube, the cross-section makes a systematic transition to a curved, equiareal rectangular duct matched to the annulus.   
   
   
       7 . The burner as claimed in  claim 6 , wherein the rectangular width of the rectangular duct is not less than 25 mm. 
   
   
       8 . The burner as claimed in  claim 7 , wherein the ratio of the rectangular width to the rectangular length is approximately 1:5.3. 
   
   
       9 . The burner as claimed in  claim 8 , wherein the unnecessary spaces remaining between the rectangular outlets are sealed off directly at the outlet and incorporated in the cooling circuit. 
   
   
       10 . The burner as claimed in  claim 9 , wherein the extension rays of the walls of the annulus intersect the central axis in a direction of the burner mouth. 
   
   
       11 . The burner as claimed in  claim 10 , wherein the pulverized fuel is at a pressure of 80 bar. 
   
   
       12 . The burner as claimed in  claim 11 , wherein the pulverized fuel is at a temperature between 1200° C. to 1900° C. 
   
   
       13 . The burner as claimed in  claim 12 , wherein the burner comprises a water cooled housing. 
   
   
       14 . The burner as claimed in  claim 13 , wherein the burner further comprises a high-voltage ignition device. 
   
   
       15 . The burner as claimed in  claim 14 , wherein the burner further comprises an integrated flame monitoring device.