SECTION P3 LINE HEATER

Transcription

1 LINE HEATER EI 224 A has one Line Heater. The WOG EI 224 #6 Sub-Sea Well flows into a Well-stream Heater, BAP This heater is a dual unit with natural draft burners. From the Well-stream Line Heater, the flow is directed to H.P. Production Separator #1, MBD Rev: 0 Date: 10/28/11 Page 1 of 5 EI 224 A

2 A. PRE-STARTUP PROCEDURE NOTICE: Refer to Preliminary Considerations in SECTION 3, PART A before beginning any start-up procedures. WARNING: Personnel shall not allow the Flowline Heater burners to heat the transfer medium while the inlet SDVs, heater surface chokes and/or outlet block valves are shut in any combination with each other. To do so will cause the thermal expansion of trapped gas in either of the affected pre-heat or post-heat voids. This will create the possibility of overpressure of the component. 1. Verify facility processes are prepared to resume production 2. Inspect components of the Natural Draft Heater a. Look for leaking or venting valves b. Look for oil or flammables around fire tubes c. Verify heat transfer medium level d. Look for oil or flammables in drains and/or skids adjacent to fire tube e. Inspect condition of fire tube and burner f. Verify the inlet and outlet process block valves to/from the Wellstream Heater are open g. Close Pilot Gas and Main Fuel Gas block valves h. Allow unit to purge for at least 5 minutes NOTICE: Always allow the unit to purge for at least 5 minutes. On calm days, or when the vessel is near the ambient temperature, longer purge times will be required. 3. Verify manual valves are open or closed as necessary to correctly direct flow through each Line Heater Rev: 0 Date: 10/28/11 Page 2 of 5 EI 224 A

3 B. START-UP PROCEDURES Natural Draft Burner 1. Pull to reset the Wellstream Heater relay if tripped 2. Turn the Ignitor/BSL to the On position. Sparking will occur immediately 3. Slowly open the Pilot Gas block valve, gas will now be flowing to the Pilot tip 4. If the Pilot does not light, close the Pilot block valve. Turn the Ignitor/BSL switch to the Off position and repeat steps 2 &3 NOTICE: Always allow 5 minutes before trying to re-ignite pilot, so that fuel gas is not allowed to accumulate in the Fire Tube section. 5. If start up is successful, the flame rod will sense the flame ignition and clear the BSL 6. Place the BSL back in service at the Control Panel 7. Allow the pilot to warm up for at least 5 minutes before lighting the Main Burner. The ideal pilot flame is a lazy blue flame with yellow fingers. 8. SLOWLY open the Main Fuel Gas block valve and monitor the flames inside the firetube through the observation view-port a. Ensure that the flame quality is pencil shaped and not licking against the top of the fire tubes b. If the Main Burner does not light instantly, quickly close the Main Fuel Gas block valve to prevent accumulation of gas in the firetube. Allow 5 minutes then repeat lighting process 9. Begin lighting process for the second burner using steps 2-8 above 10. Allow the heat transfer medium to begin heating Rev: 0 Date: 10/28/11 Page 3 of 5 EI 224 A

4 11. Monitor the Wellstream Heater until liquid flowrate and temperature have stabilized. Adjust the heat control thermostat to the desired temp (approximately 135F), if needed 12. Adjust the manual air dampener for the effected burner if the flame is not being maintained 13. Immediately begin using Normal Operating Procedures to continue monitoring system REFER TO: SECTION 5, PART C Rev: 0 Date: 10/28/11 Page 4 of 5 EI 224 A

5 C. SHUT-DOWN PROCEDURES NOTICE: Refer to Preliminary Considerations in SECTION 4, PART A before beginning any shut-down procedures. 1. Consider the length of time the unit will be shutdown. If the shutdown is for an extended period of time, the loss of heating could cause production problems 2. Close the manual block vales in the Pilot supply 3. Close the manual block valves in the Main Burner supply 4. If necessary, close manual valves to isolate individual components 5. Open manual bleed/drain valves as necessary to bleed/drain components WARNING: Use appropriate fluid collection when draining components. NOTICE: If shut-down was performed as preparation for maintenance work, or if the cause of the shutdown requires corrective action/repair, continue with Lock Out/Tag Out (LO/TO) Procedures REFER TO: Fieldwood Safe Work Practices- Section D Chapter 5 (can be found on the Fieldwood SEMS Portal) Rev: 0 Date: 10/28/11 Page 5 of 5 EI 224 A