CFBC BOILER DRIVE INTERLOCK

1
IR-CFBC BOILERDRIVE START/STOP LOGIC

• ASHVANI SHUKLA
• RELIANCE
• CI

2
MAIN EQUIPMENT

• I.D. FAN
• P.A. FAN
• S.A. FAN
• COAL FEEDER
• GRAVIMETRIC COAL FEEDER
• BED MATERIAL RAV
• LIME STONE RAV
• HP DOSING PUMP
• MDC RAV

3
I D FAN

•  
• START PERMISSIVE
• DRIVE AVAILABLE FOR DCS CONTROL
• ID FAN INLET DAMPER IN CLOSE POSITION
• ID FAN BEARING TEMPERATURE NORMAL
• ID FAN MOTOR BEARING TEMPERATURE NORMAL
• FURNACE PRESSURE NORMAL
• FLUE GAS PATH SHOULD BE THROUGH

4
I D FAN

• TRIP INTERLOCK
• ID FAN BEARING TEMPERATURE VERY HIGH
• ID FAN MOTOR BEARING TEMPERATURE VERY HIGH
• ID FAN DE VIBRATION X-AXIS HIHI
• ID FAN DE VIBRATION Y-AXIS HIHI
• ID FAN NDE DE VIBRATION X-AXIS HIHI
• ID FAN NDE VIBRATION Y-AXIS HIHI
• ID FAN MOTOR DE VIBRATION X-AXIS HIHI
• ID FAN MOTOR DE VIBRATION Y-AXIS HIHI
• ID FAN MOTOR NDE DE VIBRATION X-AXIS HIHI
• ID FAN MOTOR NDE VIBRATION Y-AXIS HIHI
• FURNACE PRESSURE VERY LOW
• OUT OF FIVE THREE TRANSFORMER TRIPPED FIELD-1
• OUT OF FIVE THREE TRANSFORMER TRIPPED FIELD-

5
PA FAN

• PA FAN START PERMISSIVE
• DRIVE AVAILABLE FOR DCS CONTROL
• PA FAN INLET DAMPER IN CLOSE POSITION
• PA FAN BEARING TEMPERATURE NORMAL
• PA FAN MOTOR BEARING TEMPERATURE NORMAL
• FURNACE PRESSURE NORMAL
• WIND BOX PURGE COMPLETED OR PA FAN RUNING OR BED
  TEMPERATURElt200
• ID FAN RUNNING
• DRUM LEVEL NORMAL
• PA FAN PRESSURE AFTER APH NORMAL

6
PA FAN

• TRIP INTERLOCK
• PA FAN BEARING TEMPERATURE VERY HIGH
• PA FAN MOTOR BEARING TEMPERATURE VERY HIGH
• PA FAN DE VIBRATION X-AXIS HIHI
• PA FAN DE VIBRATION Y-AXIS HIHI
• PA FAN NDE DE VIBRATION X-AXIS HIHI
• PA FAN NDE VIBRATION Y-AXIS HIHI
• PA FAN MOTOR DE VIBRATION X-AXIS HIHI
• PA FAN MOTOR DE VIBRATION Y-AXIS HIHI
• PA FAN MOTOR NDE DE VIBRATION X-AXIS HIHI
• PA FAN MOTOR NDE VIBRATION Y-AXIS HIHI
• FURNACE PRESSURE VERY HIGH
• ID FAN NOT RUNNING
• DRUM LEVEL VERY LOW
• PA FAN PRESSURE AFTER APH VERY HIGH
• EMERGENCY VENT VALVE OPEN

7
SA FAN

• START PERMISSIVE
• DRIVE AVAILABLE FOR DCS CONTROL
• SA FAN INLET DAMPER IN CLOSE POSITION
• SA FAN BEARING TEMPERATURE NORMAL
• SA FAN MOTOR BEARING TEMPERATURE NORMAL
• FURNACE PRESSURE NORMAL
• PA FAN RUNNING
• SA FAN PRESSURE AFTER APH NORMAL

8
SA FAN

• TRIP INTERLOCK
• SA FAN BEARING TEMPERATURE VERY HIGH
• SA FAN MOTOR BEARING TEMPERATURE VERY HIGH
• SA FAN DE VIBRATION X-AXIS HIHI
• SA FAN DE VIBRATION Y-AXIS HIHI
• SA FAN NDE DE VIBRATION X-AXIS HIHI
• SA FAN NDE VIBRATION Y-AXIS HIHI
• SA FAN MOTOR DE VIBRATION X-AXIS HIHI
• SA FAN MOTOR DE VIBRATION Y-AXIS HIHI
• SA FAN MOTOR NDE DE VIBRATION X-AXIS HIHI
• SA FAN MOTOR NDE VIBRATION Y-AXIS HIHI
• FURNACE PRESSURE VERY HIGH
• PA FAN NOT RUNNING
• DRUM LEVEL VERY LOW
• SA FAN PRESSURE AFTER APH VERY HIGH

9
DRAG CHAIN FEEDER

•  
• START PERMISSIVE
• DRIVE AVAILABLE FOR DCS CONTROL
• SILO LEVEL NORMAL
• ZERO SPEED SWITCH ACTIVATED
• BED TEMPERATURE gt MINIMUM IGNITION TEMPERATURE OF
  COAL
• MFT NOT ACTIVATED
• BED TEMPERATURE gt 760 Deg C OR FURNACE PURGE
  COMPLETED
• DCF DISCHARGE VALVE OPEN
• SEAL AIR PRESSURE AT DCF INLET NORMAL
• SA FAN RUNNING

10
DRAG CHAIN FEEDER

• TRIP INTERLOCK
• U-BEAM TEMPERATURE VERY HIGH
• BED TEMPERATURE VERY HIGH
• BED TEMPERATURE VERY LOW
• SEAL AIR PRESSURE VERY LOW
• SILO LEVEL VERY LOW
• MFT ACTIVATED
• DCF DISCHARGE VALVE OPEN

11
GRAVIMATRIC FEEDER

• START PERMISSIVE
• DRIVE AVAILABLE FOR DCS CONTROL
• SILO LEVEL NORMAL
• ZERO SPEED SWITCH ACTIVATED
• BED TEMPERATURE gt MINIMUM IGNITION TEMPERATURE OF
  COAL
• MFT NOT ACTIVATED
• BED TEMPERATURE gt 760 Deg C OR FURNACE PURGE
  COMPLETED
• GMF SUCTION SLIDE GATE VALVE OPEN
• SEAL AIR PRESSURE AT GMF INLET NORMAL
• SA FAN RUNNIN

12
GRAVIMATRIC FEEDER

• TRIP INTERLOCK
• U-BEAM TEMPERATURE VERY HIGH
• BED TEMPERATURE VERY HIGH
• BED TEMPERATURE VERY LOW
• SEAL AIR PRESSURE VERY LOW
• SILO LEVEL VERY LOW
• MFT ACTIVATED
• GMF SUCTION SLIDE GATE VALVE OPEN

13
LIME STONE RAV

• START PERMISSIVE 
• DRIVE AVAILABLE FOR DCS CONTROL
• LIME STONE BUNKER LEVEL NORMAL DCF FAN RUNNING
•  
• TRIP INTERLOCK
• LIME STONE BUNKER LEVEL VERY LOW

14
BED MATERIAL RAV

•  
• START PERMISSIV 
• DRIVE AVAILABLE FOR DCS CONTROL
• LIME STONE BUNKER LEVEL NORMAL
•  
• TRIP INTERLOCK
• LIME STONE BUNKER LEVEL VERY LOW

15
MDC RAV

• START PERMISSIVE
• DRIVE AVAILABLE FOR DCS CONTROL
• TRIP INTERLOCK
• MDC HOPPER LEVEL VERY LOW