| 摘要 |
The high-temperature burner according to the invention can be used for both gaseous and liquid fuels by simple replacement of the flame tube unit. The burner consists of a flame tube 13 preferably of metal, with air intake holes 14, a nozzle 23, inlet ducts 21, 22, 25 for air and fuel, a jacket 1 and an outlet cone 8. The flame tube is fastened into the end piece 10 of the burner and is easily replaceable. A conducting ring for reversing the flow of the inlet air through the inlet holes inwardly and backwardly towards the primary combustion zone is arranged around the flame tube, and at each air intake hole there is arranged at least one slot upstream and/or downstream for cooling the flame tube. Additional conducting rings can be arranged to amplify the cooling, and an extra jacket 50 can be arranged around the jacket 1 for circulation of water or air in the space 6 therebetween. The outlet cone 8 can also be cooled by film cooling. The inlet air is guided into the primary combustion zone through the holes in the flame tube after reversing by the conducting ring, and the flame tube is cooled downstream and/or upstream of each air intake hole. The combustion is adjusted by rotating the nozzle to an optimum position, the outlet cone is cooled by blowing in air, the speed of the air flow is increased at the rear side of the flame tube by means of the conducting ring, and the outer jacket is cooled by circulation of air or water in the interspace between this and the extra jacket. <IMAGE> |
