Circulating fluidized bed boiler easy wear parts

Fluidized bed boilers are more likely to wear parts of the four tubes, the central cylinder, such as Bu Feng device, for the internal wear parts of the furnace are the following, should focus on protection.

1, the above part of the guard combustion belt casting material: this part is close to the dense phase area, combustion particles density, from the top down the coal particles due to the acceleration of gravity in this flow rate is also very large, thus causing serious scouring of the water-cooled wall tube, so this part should focus on anti-wear.

2, the top of the furnace on both sides of the flue gas outlet parts: this part is the combustion particles and flue gas flow direction change, also more likely to wear.

3, the roof of the furnace: some boilers will produce serious wear in the entire roof of the furnace.

4、 Water-cooled evaporation screen, the bottom of the wing screen and the combination of casting material parts, through the wall tube location, and thermal deformation of the projection area.

5, around the explosion-proof door: around the storm door there are castings higher than the plane of the water-cooled wall tube, where the trajectory of the coal powder particles change, easy to cause wear.

6, temperature measuring element parts, because the particles along the wall tube slide in this part of the resistance to form vortex, thus very easy to cause wear on the wall tube, but the wear area is not large.

7, the four corners of the furnace chamber: the four corners of the furnace chamber is the convergence area of pulverized coal particles, especially close to the combustion belt parts, more likely to wear.

8, furnace chamber water-cooled wall butt welds, generally require sub-arc welding, there are general electric welding seam at, shall be polished flat, otherwise easy to wear in the upper part of the weld tumor.

9, the flue tail secondary superheater area.