UTILITIES – SOP ON BOILER

1. Ensure: Quality of water. The hardness of water should not exceed the limit of 2PPM.
2. Ensure levels of LDO/Diesel & soft water in tanks.
3. Ensure steam temperature is set at –195°C.
4. Ensure drain valve of economizer, fuel strainer drain valve and coil blow down valve are closed.
5. Open control valves of water, LDO/diesel.
6. Put the electronic main switch ON. Observe the white control lamp comes ON.
7. Close main steam valve and open the auxiliary steam valve.
8. Put the Fill switch on to fill up the coil.
9. When the water starts coming out of the auxiliary steam valve, the unit is ready for firing. Ensure at this line that all the red lamps are off and only the white control lamp is on at this stage.
10. Press Fuel circulation switch for about half a minute so that Fuel pressure builds up to about 2kgs/SQ cm.
11. Put the fire switch on. Blower, Fuel Pump and water pump will start.
12. Ensure that the green “burner on” lamp comes ON.
13. When the steam pressure gradually builds up to 5kgs/cm2, open the main steam stop value gradually and close the auxiliary steam value simultaneously.
14. Ensure while running the boiler the following are maintained
a. Steam pressure between 9kgs-6kgs/cm2 .
b. Water pressure at 50 bar.
c. Feed water temperature at 80°C.
d. Steam temperature between 170°C-190°C.
e. Fuel pressure at 12kgs/cm2
STOPPING
1. Close the steam stop valve fully. The pressure switch will cut off the boiler automatically.
2. Put the fire switch off.
3. Open the coil blow down valve fully. Once blow down is over close the blow down valve and open the auxiliary steam valve fully.
4. Drain the economiser by keeping its drain valve open till clear water starts coming out.
5. Put the Fill switch ON and Fill up the coil with water. When the steam temperature indication falls below 90°C, put the fill switch off. Close the auxiliary steam valve.
6. Put off the heater switch.
7. Put off the electric main switch.
8. Clean any dripped oil, water…etc.
9. Close the outlet values of water service tank and LDO/Diesel service tank.
10. Record timings of operation & fuel consumption.