The fire barrel type heating furnace is mainly composed of a barrel body, a head, a fire tube, a smoke pipe, an oil (water) distribution pipe, a smoke box, a chimney, a saddle type bearing and various interface pipes. The fuel burns in the furnace to form high-temperature flue gas and releases heat. The heat generated by the high-temperature flue gas passes through the fire tube or convection pipe, and transfers the heat to the furnace medium in the form of heat conduction, radiation, and convection to make the temperature reach the process. Process requirements.
In the heating furnace, 1.2~2.4m long refractory bricks are laid at the entrance of the fire side of the burner. When the fuel is burned, the ceramic fiber blanket generates a large amount of heat on the surface of the refractory brick. The firebrick transfers the heat to the outside, resulting in a distance from the refractory brick. The heat intensity of the fire tube is too high, local overheating, oxidation, axial deflection, radial depression and other deformation.
The transfer station is currently using a self-discharging process. The sediment enters the heating furnace from the discharge pipeline. Under the action of the convection of the heated medium, the sediment in the heating furnace is continuously stirred and finally falls on the top of the fire tube and the smoke tube.
During dredging and heating furnace overhaul, it can be found that the thickness of sediment on the heating furnace fire pipe reaches 150mm or more, especially in the high temperature area of ​​the fire pipe (100-500mm outside the firebrick). Under such circumstances, the heat transfer efficiency of the heating furnace will inevitably be reduced and local overheating will occur, and bulging and perforation will occur at any time.
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