1. The surface of the low cement castable around the water-cooled wall and the bottom of the hanging screen as well as through the wall in the dense phase area of the furnace shall be complete and smooth, with uniform thickness, no wear, peeling, pitting and bulging, no exposed pipe rows in the cladding layer, no reticular cracks or penetrating cracks, and the width of the cracks shall be less than 5mm, and the partial demolition and repair shall be carried out if the cracks are larger than 5mm.
2. The surface of castable in cyclone separator, feed leg and feed return leg shall be complete and smooth, with uniform thickness, without wear, peeling, dimpled surface and bulging phenomenon, and without network cracks and penetrating cracks. In case of layered bump or crack, the width shall be less than 10mm, and partial demolition and repair shall be carried out when it is larger than 10mm.
3. The surface of the gussables of the outlet horizontal flue of the furnace and the outlet horizontal flue of the cyclone separator shall be complete and smooth with uniform thickness, free from wear, peeling, pitting and bulging, and free from network cracks and penetrating cracks. In case of stratified bulge or crack, the width shall be less than 10mm, and the partial demolition and repair shall be conducted when it is larger than 10mm.
4. For castable covering layer that often falls off, artificial vibration shall be adopted to check hidden defects. When castable falls off or becomes loose, partial demolition and repair shall be carried out.
5. The surface of the castable of the anti-wear beam shall be complete and smooth, with uniform thickness, without falling off or bulging phenomenon, firm gripping nail, no open welding phenomenon, and no network cracks or penetrating cracks. The width of the cracks shall be less than 5mm when they appear, and local demolition and repair shall be conducted when they are larger than 5mm.
6. The low cement castable at the thermal measuring point of the boiler shall not hinder the advance and retreat of the measuring point and change the elevation and Angle of the measuring point.
7. The surface of the castable in the water cooling air chamber shall be complete and smooth with uniform thickness, free from wear, peeling, pitting and bulging, no exposed pipe rows in the cladding layer, no network cracks and penetrating cracks, and the width shall be less than 10mm in the case of layered bulging or cracks, and the width shall be less than 10mm in the case of cracks larger than 10mm
The ministry was dismantled and repaired.
8. The firebrick in the starting burner should be firm and flat without wear, falling off and bulging.
9. The castable between the air distribution plate and the hood shall be complete, with uniform thickness, without wear, falling off and bulging, without reticular cracks and penetrating cracks, and without exposing the pipe row of the covered air distribution plate. The width of the crack shall be less than 5mm, and partial demolition and repair shall be carried out when it is larger than 5mm.
10. The low cement castable at the manhole doors of the furnace and the flue at the rear of the boiler is firm and smooth, without wear, falling off and bulging.
