Combustion device and boiler

Abstract

A combustion device includes: a burner including an ammonia injection nozzle having a tip portion provided with an injection port facing an internal space of a furnace; an adjustment structure that adjusts a temperature of the tip portion; anda control device that controls an operation of the adjustment structure so that the temperature of the tip portion is equal to or lower than a reference temperature.

1 . A combustion device comprising:
 a burner including an ammonia injection nozzle having a tip portion provided with an injection port facing an internal space of a furnace;   an adjustment structure that adjusts a temperature of the tip portion; and   a control device that controls an operation of the adjustment structure so that the temperature of the tip portion is equal to or lower than a reference temperature.   
     
     
         2 . The combustion device according to  claim 1 , wherein
 the adjustment structure includes a mechanism that adjusts a flow rate of ammonia in the ammonia injection nozzle.   
     
     
         3 . The combustion device according to  claim 1 , wherein
 the adjustment structure includes a mechanism that adjusts a separation distance between the injection port and the internal space.   
     
     
         4 . The combustion device according to  claim 2 , wherein
 the adjustment structure includes a mechanism that adjusts a separation distance between the injection port and the internal space.   
     
     
         5 . The combustion device according to  claim 1 , wherein
 the adjustment structure includes a mechanism that adjusts an opening area of the injection port.   
     
     
         6 . The combustion device according to  claim 2 , wherein
 the adjustment structure includes a mechanism that adjusts an opening area of the injection port.   
     
     
         7 . The combustion device according to  claim 3 , wherein
 the adjustment structure includes a mechanism that adjusts an opening area of the injection port.   
     
     
         8 . The combustion device according to  claim 4 , wherein
 the adjustment structure includes a mechanism that adjusts an opening area of the injection port.   
     
     
         9 . The combustion device according to  claim 1 , comprising an air pipe disposed coaxially with the ammonia injection nozzle so as to surround the ammonia injection nozzle, wherein
 the adjustment structure includes a mechanism that adjusts a flow rate of air in the air pipe.   
     
     
         10 . The combustion device according to  claim 2 , comprising an air pipe disposed coaxially with the ammonia injection nozzle so as to surround the ammonia injection nozzle, wherein
 the adjustment structure includes a mechanism that adjusts a flow rate of air in the air pipe.   
     
     
         11 . The combustion device according to  claim 3 , comprising an air pipe disposed coaxially with the ammonia injection nozzle so as to surround the ammonia injection nozzle, wherein
 the adjustment structure includes a mechanism that adjusts a flow rate of air in the air pipe.   
     
     
         12 . The combustion device according to  claim 4 , comprising an air pipe disposed coaxially with the ammonia injection nozzle so as to surround the ammonia injection nozzle, wherein
 the adjustment structure includes a mechanism that adjusts a flow rate of air in the air pipe.   
     
     
         13 . The combustion device according to  claim 5 , comprising an air pipe disposed coaxially with the ammonia injection nozzle so as to surround the ammonia injection nozzle, wherein
 the adjustment structure includes a mechanism that adjusts a flow rate of air in the air pipe.   
     
     
         14 . The combustion device according to  claim 6 , comprising an air pipe disposed coaxially with the ammonia injection nozzle so as to surround the ammonia injection nozzle, wherein
 the adjustment structure includes a mechanism that adjusts a flow rate of air in the air pipe.   
     
     
         15 . The combustion device according to  claim 7 , comprising an air pipe disposed coaxially with the ammonia injection nozzle so as to surround the ammonia injection nozzle, wherein
 the adjustment structure includes a mechanism that adjusts a flow rate of air in the air pipe.   
     
     
         16 . The combustion device according to  claim 8 , comprising an air pipe disposed coaxially with the ammonia injection nozzle so as to surround the ammonia injection nozzle, wherein
 the adjustment structure includes a mechanism that adjusts a flow rate of air in the air pipe.   
     
     
         17 . A boiler comprising the combustion device according to  claim 1 .