Emergency power outage response plan

Each factory has different processes, and thus its emergency response plans for power outages also vary. The following is our factory’s emergency plan for power outages, for reference only. Emergency Plan for Plant-Wide Power Outage: To prevent accidents and losses that may occur as a result of sudden shutdowns due to a plant-wide power outage, the following plan is established: A. During normal operation: 1. In the event of a plant-wide power outage that leads to a shutdown, all staff members must follow the operating procedures and the emergency shutdown steps specified in the emergency plan. It is strictly prohibited to recover any released gas, to avoid the tank top from overturning. 2. Return each 6KV motor switch to the off position to prevent startup in case of a sudden power supply restoration. 3. The gas generation workshop should contact the dispatcher to determine whether to seal the inlet and outlet of the gas holder based on the duration of the power outage. 4. The on-duty dispatcher must promptly direct the handling of power outage incidents, and rush to the high-voltage electrical control room and the thermal power main control room to oversee the investigation into the cause of the outage. Report the situation immediately to the municipal dispatch center and the 220KV substation, and inform the meat processing plant to find out the cause of the power outage. 5. If the issue is due to an electrical problem within the plant, identify the cause and then close the connecting switches (606, 609) between the thermal power high-voltage room and the electrical high-voltage room. Report to the city’s control center and the 220KV substation, close switch 3501 to supply external power, and then proceed with the startup procedures. If the outage is caused by an external power supply issue, the connection switches (606, 609) between the thermal power high-voltage room and the electrical high-voltage room must be operated by a dedicated person who goes to the 220KV substation to determine the cause of the outage and arrange for the restoration of external power supply. Once the external power supply is restored, the 220KV substation operates switch 3107 to supply power again, after which the machine can be started following the standard startup procedures. B. When operating in standalone mode, if the external power supply fails and production relies entirely on self-generated power, the slightest mistake can lead to the shutdown of the entire plant, resulting in significant losses. To this end, the following provisions are specifically made for abnormal operating conditions: 1. During normal production: (1) The control room shall focus on the boiler and turbine, maintain close communication, and pay close attention to their load. In the event of any abnormal situations, decisive actions must be taken to make timely adjustments. Scheduling principle: Adjust production load while ensuring uninterrupted power supply. (2) Each workshop must strictly follow the dispatch instructions; if there are any issues at a particular post, they should be reported to the on-duty dispatcher promptly, and measures should be taken right away ； It is necessary to contact the control room before starting the equipment. Especially the thermoelectric workshop. 2. In the event of a turbine trip during operation and a complete power outage in the plant: (1) The personnel on duty at the turbine area should immediately use the residual pressure in the steam main to start one of the turbines quickly and stabilize its speed, while simultaneously closing the water supply valves on the condensers of the other two turbines. The thermoelectric control team quickly disconnected the connections to the external power grid (605, 606, 609). Once it was confirmed that there were no issues with the thermoelectric system, power generation was resumed, and the gas cycle converter switch (608) was closed. In the event of a power outage, the steam circulation team should immediately prepare to start pump #1; once power is restored, pump #1 should be started right away to supply water to the steam turbine. (No need to inform the dispatcher or electrician.) (4) After a power outage, the boiler operator must immediately prepare the boiler for operation; once power is restored, the boiler should be started promptly to supply steam. (5) After a power outage, the electrical workshop must promptly check the system for any issues. Once it is confirmed that there are no problems, it should contact the control room, which will then inform the thermal power control unit to restore power supply. After the call, close 1# carbon circulation valve and start the brine supply. (6) Upon power restoration, the desalination team should promptly start Pump No. 4 to operate the desalination water pump and supply water to the boiler. (7) The thermoelectric plant started the boilers one after another, while the remaining steam turbines were started up and connected to the grid. (8) The subsequent section is started up according to the normal startup procedures and put into normal operation. (9) The above points are of great importance; it is hoped that all units will strictly comply with them to ensure normal production under special circumstances. If consequences result from human error, responsibility must be held.

An emergency power outage is also referred to as a voltage fluctuation, that is, a disturbance in the company’s power supply. I have prepared plans for dealing with such situations specifically for our ammonia synthesis plant, which operates using the Kellogg process; I hope these will be useful to those working in this field. Handling: I. Conversion to central control mode 1. After a power fluctuation incident occurs, first determine the area that needs to be shut down and inform the shift supervisor, who shall immediately notify the dispatch team. 2. Ensure that SP-1405 and 1408 are turned off, thereby shutting down Furnace Unit 1. 3. Shut down XV-1258/FCV-1002; this will also shut down the auxiliary boiler (when the flame detection interlock is active, a power outage in the flame detection system may occur, triggering an interlock response). 4. Confirm that the solenoid valves of all burners in 103-B are closed, and that the vent valves are open. 5. The central control unit shall inform the personnel on site that Furnace Unit 1, the auxiliary boiler, and the heating furnace have been shut down, and full shutdown procedures shall be carried out. 6. Start MCV-26 and set HS-17 to “incident” mode. 7. After receiving notification from crew member 103-J that the unit has stopped, adjust MCV-1180 to prevent overpressure in the medium pressure system. 8. After receiving notification from crew member 101-J that the unit has stopped, shut down MCV-101 and open MCV-19 to 50%. 9. The shift leader contacts the control room to request that S100 be shut down; upon receiving confirmation from the control room, inform the operators there to shut down SP-100. 10. The control room shuts down SP-100. 11. Shut down PCV-34. 12. Shut down PCV-1601, MCV-1601, and PCV-1602, as well as FCV-1. 13. Shut down MCV-1-10, as well as MCV-1264, 1274, and 1284. 14. After the low-pressure transformer is shut down, monitor the level of liquid in E66401; promptly inform the decarburization team to stop operating J66401A/B. 15. After receiving confirmation from the field that the outlet valve of E66401 has been closed, shut down FCV-97. 14. Once power is restored, instruct the field to start up 104-JA. 15. After receiving confirmation from the field that 104-JA has started up, or after seeing that it has started up on the DCS, pay attention to adjusting MCV-12 to control the water supply to 101-F and 122-F. 16. The team leader contacted Sinochem to conduct furnace analyses for units 101-B, 103-B, and 101-BU. 17. After the furnace analyses were successful, ignition was carried out following the ignition procedure. On-site procedures: 1. Upon receiving notification from the control room that one section of the furnace, the auxiliary boiler, and the heating furnace have stopped operating due to power fluctuations, go to the site and first start the 104-JB/J/JA auxiliary oil pumps as well as the 101-BJ auxiliary oil pump. 2. Start the 103-BJ pump. 3. Open the front valve of MCV-26, and inform the control room that the front valve has been opened. 4. Close the fuel gas front valves for the burners 101-B, 103-B, and 101-BU, and inform the control room that these valves have been closed. 5. Shut off the jacket water; based on the vacuum level indicated by 152-JC, decide whether to open the atmospheric safety valve of 101-BJ. 6. Upon receiving notification from the control room that the low-pressure transformer has been shut off, close the outlet valve of the low-pressure transformer and inform the control room once this is done. 7. Close the valve leading to Section 1 of the furnace, E66401, and inform the control room of this action. 8. Check to confirm that 101-BJA has stopped operating. If it stops, check whether MCV-30 and 31 are already activated; if the dampers are stuck, open them manually. 9. If smoke comes from the bearing of 104-JB, inform the control room and stop 104-JB. 10. After receiving permission from the control room to start 104-JA, first confirm that the auxiliary oil pump of 104-JA is operating properly before starting it, and then report the situation back to the control room. 11. Close the hydrogenation valve at TCV-04106. 12. Open the hydrogenation valve on NG-8-16″. 13. Close the outlet valve of 108-DA as well as the second outlet valve. II. Synthesis 1. Check whether the pressure of the instrument air has decreased, and pay attention to whether the air compressor is operating properly ； If the air compressor stops, start it promptly in accordance with the procedures. 2. According to the parking range, carry out the operations in accordance with the relevant first-accident operation procedure. III. Unit 1: Confirm that the standby oil pumps 101-J/105-J start automatically; if they do not start automatically, start the main oil pump immediately. 2. Confirm that the standby lubricating oil pump and seal oil pump of 103-J start automatically; if they do not start automatically, start the main oil pump immediately. 3. Check the operating status of 122-JA/J and 124-JA/J; if both pumps have stopped, start JA or J immediately. 4. The crew who jumps out of the aircraft shall be handled in accordance with the first accident plan. 5. If the power outage lasts for a long time, after each unit shuts down, all trip valves should be closed promptly to reduce the rotor’s coasting time. Start the oil pump immediately upon receiving the call to supply oil to all bearings. This post was last edited by Huang Xinhui on 2009-2-24 01:55.]

Indeed, the emergency plan for stopping oscillation should be included in the operating procedures.