Page 285 - Wastewater Solids Incineration Systems

Incinerator Operations 247

TABLE 10.3 Typical fluid bed incinerator operating problems.
Problem Cause Solution
1. Preheat burner 1a No fuel to pilot 1a Open all manual valves. Check operation of
pilot will not pilot solenoid.
ignite
1b No spark 1b Remove spark plug; check, clean, or replace.
Check by closing valves, pressing ignite
button, and observing whether there is a
spark. Check ignition transformer and
power supply. Reconnect loose threads or
replace transformer.
1c Not enough air 1c Check airflow.
1d Defective air/fuel regulator 1d Repair regulator.
1e Pilot lights but shuts down after 1e Remove and clean flame scanner; replace if
short time defective. Check flame safeguard relay or
controller; and replace if defective.
2. Preheat burner 2a No fuel to main flame 2a Open all manual valves.
main flame will Check operation of fuel solenoids.
not ignite Check fuel pressure.
2b Pilot flame not stable 2b Check pilot system.
2c Not enough air 2c Check airflow. Check that air valve is in low
position.
2d Main flame lights but shuts 2d Remove and clean flame scanner; replace if
down after a short time defective. Check flame safeguard relay or
controller; replace if defective.
2e Main flame lights but is unstable 2e Tune burner using manufacturer’s
instructions.
3. Bed high 3a Auxiliary fuel rate too high 3a Reduce auxiliary fuel flow rate.
temperature
3b Cake feed rate too high 3b Reduce cake feed rate.

3c Cake heating value increased or 3c Increase fluidizing airflow rate. Decrease
moisture content decreased cake feed rate.
3d Bed temperature thermocouple 3d Bed temperature indicator and recorder
defective read at top of scale. Replace thermocouple
and well.
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