news

What is the thickness of the lining of each part of the circulating fluidized bed boiler

May 30, 2022

Fluidized bed boiler chamber, cyclone separator, feeder, external bed and other parts. The lining structure is three layers, the first layer is insulation layer, the second layer is insulation layer, the third layer is working layer.

 

Cone section and straight section of cyclone separator are three-layer structure, the first layer is light insulation brick, the second layer is insulation firebrick and the third layer is heavy firebrick, the thickness of 350-400mm.

 

The refractory material of the returner is a three-layer structure, the first layer is insulated firebrick, the second layer is ultra-light castable and the third layer is low cement castable, the thickness is 400-430 mm.

 

Furnace temperature is high, is a layer of structure. In general, heavy corundum wear-resistant castable is used with a thickness of 150-200mm.

 

The external bed is a two-layer structure, the first layer is insulated firebrick, the second layer is low cement castable, thickness of 300-380mm.

 

The bottom ash cooler is a two-layer structure, the first layer is insulated firebrick, the second layer uses spray paint or low cement castable, thickness 200-410mm, there are also roller slag coolers.

 

Boiler of lining materials, refractory mortar joint must build by laying bricks or stones, refractory castable must strict control of water addition, completes the maintenance and baking, to ensure the normal start and stop of boiler furnace and the load change process, depending on the degree of erosion using the temperature of the parts, choose suitable lining materials, and construction personnel's technical level is the construction personnel should choose to have certain experience. Make the lining material reasonable construction.

 

In a word, there are many factors that affect the use effect of the lining of fluidized bed boiler, but it is necessary to insist on the quality of the lining material and the whole construction process control. Construction shall be carried out in strict accordance with the construction process of firebrick and castable used for lining.