Page 309 - Wastewater Solids Incineration Systems

270 Wastewater Solids Incineration Systems

• Information concerning type, quantities, and costs of materials used;
• Information concerning labor requirements and costs; and

• Any problems encountered during repairs.
If any changes from the original configuration are made, a record should be kept.
These changes might include

• Drop holes enlarged (locations, details, and date).
• Burner view ports added (locations, details, and date).
• Rabble teeth revised (locations, details, and date).
• Hearth bricks changed (from special-shaped to standard-sized or vice versa).

• Row of bricks removed from the “in” drop zone (locations, details, and so on).
Preventive maintenance is needed once a year when the incinerator is shut down
and cleaned. A thorough inspection of all internal parts should be made. In partic-
ular, check the following:
• Rabble teeth (warping and cracking).

• Rabble arms (sagging and refractory cracking).
• Slag buildup.
• Burners (tile cracking and slag).
• Hearths (sagging, loose/missing bricks, and cracks).
• Side walls (cracking and slag).

• Drop holes (particularly the bottom surfaces for deterioration of refractory).
• Center shaft (refractory cracking).
• Center shaft and rabble arm sockets (cracking).
• Center shaft drive motor and gears.
• Ceilings (cracking and slag).

2.0 FLUID BED INCINERATORS

Maintenance of fluid bed incinerators is substantially less than that associated with
MHFs because of the limited number of moving parts in a fluid bed incinerator.
However, maintenance is still required to extend the life of the equipment.