Page 276 - Wastewater Solids Incineration Systems

238 Wastewater Solids Incineration Systems

• The water supply for freeboard sprays is turned on.

• Air for fluidizing, purging, and preheating the burner is available.
• All necessary electrical breaker switches are closed.
• All manholes, nozzles, and sight glasses on the incinerator are closed.
• All equipment has received required preventative maintenance.

• All valves are in the required positions for startup.
• Blowers and fans are started with closed inlet valves and dampers to prevent
driver overload.
• All controllers are set in manual position.
• The alarm system is functioning.

In addition, during the system preparation process, the operator should

• Test run all blowers.
• Add sand to the incinerator bed as required.
• Set valves on the preheat burner system in the required position.
• Ensure that the feed cake system is ready for operation.

The incinerator system is now ready for startup. To start up the fluid bed inciner-
ator, the operator will
• Open the scrubbing system water valves.

• Start the purge air blowers.
• Start the fluidizing air blowers.
• Start the preheat burners.

• Begin gradual heating of the incinerator.
The pilot flame or the main flame at low fire will be used to accomplish the
initial stages of heat up. The latter stages require increasing the preheat
burner firing rate.
Heat the incinerator at a rate of 38°C (100°F) per hour to 104°C (220°F).
Hold at 104°C (220°F) for two hours.

• Operate the fluidizing air blower for 30 seconds every 30 minutes to bump the
sand bed. This evenly heats the sand.