Talk about the accident handling and operating principles of my own installations
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Our accident handling and operating principles for the hydrocracking unit (which operates using a fixed-bed, two-stage, single-pass process and is located in the north where frost and condensation prevention are necessary in winter) are as follows: 1. Put people first, strictly prevent overheating and overpressure, and protect the equipment and catalysts as much as possible； 2. Ensure the flare air defense system remains unobstructed under all circumstances ； 3. Closely monitor the high liquid level indoors and at the site; if it reaches the interlock value due to being too high or too low, and automatic interlocking does not occur, promptly initiate manual interlocking to prevent accidents such as the unit operating with liquid present or pressure transference ； 4. Ensure that the device interlock system is in operation at all times ； 5. When reducing temperature and volume, it is essential to follow the principle of reducing temperature first and then volume ； 6. If the temperature at any point in the reactor bed exceeds the normal value by 15°C during accident handling, the 0.7 Mpa/min pressure relief system can be activated immediately; if the temperature at any point in the bed exceeds the normal value by 28°C or 425°C, the 2.1 Mpa/min pressure relief system can be activated immediately, until the temperature is brought under control ； 7. Strengthen inspections of air cooling to prevent deviation and freezing in high-pressure air cooling and tail oil air cooling systems ； 8. Pay attention to adjusting the circulation water volume of the tail oil heat exchanger to prevent leaks in it ； 9. Ensure reflux at the top of the tower as much as possible to prevent flooding, and strictly avoid any leaks or blockages in the light oil lines ； 10. Take strict precautions to prevent secondary accidents during accident handling. Talk about the procedures for handling accidents and the operating principles in your facility; also discuss similar facilities and identify any differences... This post was last edited by jilinzhengda on 2009-2-22 at 11:20.]
Minimize losses as much as possible while ensuring personal safety. 1. Guarantor. 2. Protect the equipment. 3. Maintain normal production. 4. Consider the environment.
1.1 Principles for handling accidents 1.1.1 Accurate assessment: When operators detect signs of an accident, they should immediately report to the shift leader who will organize an inspection to accurately determine the possible causes and locations of the accident. 1.1.2 Timely reporting: Accident situations should be reported promptly to the shift supervisor, who will then inform the relevant manager for further instructions on how to handle the situation. If it is not possible to report at that time, after following the established procedures, the shift leader should report to the workshop and the control room. 1.1.3 Prompt handling: In the event of an accident, if it is handled in a timely and appropriate manner, there may be no losses or only minor losses ； If not handled decisively, it may result in significant losses. The team leader should provide unified command and coordination of the actions at each position, ensuring that every second is utilized efficiently while maintaining order amidst the hustle. The handling of accidents should follow these principles: 1) Prevent personal danger ； 2) Prevent fire and explosion ； 3) Prevent equipment damage ； 4) Prevent coking in the heating furnace ； 5) Prevent overheating and overpressure ； 6) Protect the catalyst. Under no circumstances should the reactor system experience negative pressure ； 7) Prevent high voltage from leaking into low voltage. Prevent oil crossover in the compressor ； 8) Prevent hydrogen sulfide poisoning. 1.1.4 In the event of any abnormal operation, the following steps can protect the equipment and catalyst from damage: 1.1.4.1 Reduce the reactor temperature and control the operating parameters ； 1.1.4.2 Maintain the flow of gas at maximum volume within the system ； 1.1.4.3 Maintain a high hydrogen partial pressure, unless overheating may occur ； 1.1.4.4 After stopping the feed oil pump, retain as much oil on the surface of the catalyst as possible. 1.2 Emergency venting procedure (to be carried out by the operator) ； (To be checked and confirmed by the shift leader) In the event of serious accidents such as fires that cannot have their source of fire extinguished, ruptured pipelines that cannot be sealed, severe equipment leaks, or excessive overheating of the bed layer, emergency venting must be carried out. The emergency venting procedure is as follows: 1.2.1 Shut down the heating furnace and stop the fuel gas supply ； 1.2.2 Stop and feed crude oil ； 1.2.3 Stop the supply of new hydrogen to the reaction system ； 1.2.4 Activate emergency venting ； Assign someone to monitor the high-level liquid level and pay attention to oil reduction at high levels.
The principles of our device are similar to yours. First, the guarantor. Second, protect the equipment and catalysts. Third, ensure that normal production can be restored in a short time, minimizing economic losses. Fourth, consider environmental protection issues.
It’s to protect personal safety, ensure the safety of equipment, safeguard the catalysts, and prevent coking in the furnace tubes! ~
They’re all more or less the same; ours is the same as well. The main priorities are to protect the catalyst and ensure personal safety. I’d add one more point: after the pressure relief sequence is triggered, someone should check to see whether all the related systems are functioning properly – such as the heating furnace, the new hydrogen generator, and the feed pump – and take action if any of them stop working. Also, circulation should be carried out if emergency pressure relief distillation is performed. There are also people on standby to introduce nitrogen for displacement in order to prevent excessive temperature rise, with special attention being paid to the liquid level at high temperatures.
Are they all hydrocracking units? Please talk about any other types of units as well. It would be best to explain what kind of device it is
Atmospheric pressure facility: The flange of the oil transfer line has caught fire; the situation is urgent. A leak was detected a few days ago, and things were fine after it was sealed promptly. Fire suppression steam has been connected on site to provide ongoing protection. Fire broke out again three days later, but thanks to early detection, no major accident occurred.