-
7/30/2019 SMP - Flame Scanner
1/4
The purpose of the SMP -Flame Scanner is to train and guide
maintenancepersonnel to ensure safe and efficient maintenance of
the system.
Responsibility: Team Leader, C&I
Other Department To Be Intimated: (Main Plant Operation)
Details Of Hazards Involved
1. Fall
2. Heat
3. Dust
4. Noise
5. Poor illumination
6. Electrical hazards
7. Fire
8. Slip
9. Heat Radiation
SMP -Flame Scanner 1 / 4
ORISSA POWER GENERATION CORPORATION LTD.
IB THERMAL POWER STATION, BANHARPALI
STANDARD MAINTENANCE PRACTICE
FLAME SCANNER
Document No:SMP / C&I 30
Filed At: Control & Instrumentation Dept
-
7/30/2019 SMP - Flame Scanner
2/4
Safety Precautions Required
1. PTW is taken from control room.
2. Ensure Burner tilt position at 50%.
3. Ensure the use of PPE.
4. Ensure sufficient light at work place.
5. Ensure the electrical isolation (removal of electronic card)
before
working.
6. Ensure the furnace pressure in negative.
7. Do not run scanner wiring in cable trays or conduit carrying
general-
purpose power wiring for motors and lights. When practicable,
keep
scanner cables away from igniter transformers and high-energy
arc power
pack at the wind box area. All wiring connections should be
thoroughly
checked before energizing the scanner circuit. Erroneous wiring
may
damage semiconductors or other components.
T & Ps including special one
1. Multi meter,
2. Allen Key Set,
3. Spanner Set,
4. Screw Driver Set,
5. 12 inch pipe wrench,
6. Slide wrench (6 inch, 8 inch, 12 inch),
7. Hand Gloves,8. Nose Pliers,
9. Cutting Pliers,
10.Junior Hacksaw.
Permit Type: Permit To Work Order
SMP -Flame Scanner 2 / 4
-
7/30/2019 SMP - Flame Scanner
3/4
Permit Approving Authority: Shift-in-Charge (Main Control
Room)
Isolation Procedure:
A. Flame Scanner Panel (Ensure Sequence)
1. Remove Intensity & fault detection card.
2. Remove frequency card.
3. Remove Lamp & Meter card.
Frequency of maintenance: Annual Outage / As often required / In
case of
failures.
WORK INSTRUCTION PROCEDURE
1. Remove the flame scanner plug & cover it with any cotton
cloth.
2. As when the scanner assembly housing adapter flange is
disconnected,
the scanner assembly must be removed from the guide pipe
immediately.
So wrap a cloth around the scanner support pipe and hold it
firmly
against the cooling air manifold to minimize the escape of
cooling air
while the head is being removed. The head should be held in the
rag to
protect it from damage. Install the cover plate to retain the
cooling
airflow within the scanner guide pipe. Shut off valve must be
installed in
cooling airlines to scanners.
3. Loosen the three bolts of flame scanner.
4. Remove from its place safely by two persons.
5. Mechanical Housing Cover to be tightened immediately.
6. Ensure Burner tilt position at 50 %.
7. Bring the safe scanner safely to C&I Lab for
calibration.
8. After calibration is over, take the scanner to field for
installation.
SMP -Flame Scanner 3 / 4
-
7/30/2019 SMP - Flame Scanner
4/4
9. Remove the Mechanical Housing Cover and install.
Checks Before Release Of Permit
1. Ensure the healthiness of scanners.
2. All T & Ps and manpower are removed
Re-Commissioning Procedure
1. PTW is returned.
2. Normalize all the isolations after release of PTW.
Revision No& Date
Prepared By Verified ByTechnical Committee
Approved ByDirector (Operation)
A. K. Patra
SMP -Flame Scanner 4 / 4
