Emergency Plan for Fire Outbreak Due to Severe Leakage in the Seal of the Slurry Pump in the Catalytic Unit

Key points: 1. Control leaks. 2. Stop the pump on-site; if this does not achieve the desired result, shut off the power supply to the leaking slurry pump remotely from the control room. 3. Isolate the leak point and close the valves at both ends of it.

If there is a leak and fire: 1. Use the mechanical seal steam shield to create a protective barrier. 2. In the early stages of a fire, steam and dry powder fire extinguishers are used to put out the fire; personnel responsible for distillation and absorption, pump operators, and the factory’s volunteer fire team work together with the professional firefighters to extinguish the fire. While using dry powder extinguishers to put out the fire, the fire department sprayed water on the top of the pump to cool it down, preventing any further oil slurry that might leak from catching fire. 3. Leak source control: Cut off the feed at the reaction unit and close the oil slurry reprocessing valve. At the fractionation station, close the bottom extract line valve and the inlet valve of the slurry steam generator; the slurry pump should be stopped using the remote shutdown system. If such a system is not available, contact an electrician to cut off the power from the control room. Switch to processing immediately after the fire is extinguished. 4. Operators in thermal control positions should adjust the steam pressure properly to prevent fluctuations in the steam system.

1. In the event of a leak, contact the shift leader or chief operator; if the leak is minor, it can be extinguished immediately using steam or other means. If that does not work, the emergency response plan should be implemented promptly. 2. Stop the pump on site immediately; if it is not possible to cut off the power at the scene, contact the power distribution room to do so. 3. Close the pump inlet and outlet valves, or close the large extraction valve at the bottom of the tower; other positions shall take corresponding actions.

Methods for dealing with slurry pump leaks: I. When the leak is minor: 1. The distillation unit should immediately shut down the slurry pump, stop the slurry circulation, and close the inlet and outlet valves of the pump. 2. During the pump shutdown process, use steam blankets and fire extinguishers to prevent a sudden increase in leaks. 3. Urgently dispatch the slurry standby pump. II. Large leakage volume (people cannot approach). 1. Use steam blankets and fire extinguishers to prevent fires caused by the leakage. 2. Close the large valve for bottom extraction of the tower, as well as the inlet valves of each slurry heat exchanger. 3. The distillation unit should increase the flow rate of the heavy recycled oil, draw more heat from within the tower to produce more diesel, and use the top reflux to control the temperature at the tower top. 4. The unit shall immediately activate the \"three-device self-protection\" function, shut off the feed, maintain single-container fluidization, and ensure that the pressure in the settler remains 10 Kpa higher than the pressures of stage 1 and stage 2. 5. Reduce the flow rate of stripping steam and atomizing steam according to the operating conditions, in order to prevent pressure buildup in the settler due to an excessively high liquid level at the bottom of the tower; if necessary, the stripping steam, atomizing steam, and pre-lift steam can be shut off. 6. Make corresponding adjustments by cutting off feed as required based on reactions in other areas. At the same time, prepare for an emergency shutdown and remain on standby. 7. Depending on the situation, call the fire emergency number “119” to request assistance from the fire department and cooperate fully.

If an oil slurry pump is leaking and on fire, the pump must be stopped first. If the leakage and fire are minor, one can go into the pump room to stop the pump, close the inlet and outlet valves, and extinguish the fire using steam or dry powder fire extinguishers. If the leakage is severe and the fire is intense, making it impossible to enter the pump room to stop the pumps, then the power supply must be cut off at the distribution panel in order to stop the pumps. The nearest valves controlling the flow of oil slurry to and from the pumps should be closed inside the unit. At the same time, an alarm should be raised to contact the relevant authorities and the fire department for assistance in extinguishing the fire. If there is fire-suppression steam available above the pumps, it can be used to put out the fire from outside the pump room. After stopping the slurry pump, the fractionation unit should increase the flow rates of secondary middle stream, primary middle stream, top circulation, and cold reflux to prevent tower flooding incidents; if the diesel changes color, it should be classified as defective immediately. The reaction unit should appropriately reduce the processing volume as appropriate to maintain production; in severe cases, the feed should be cut off and combustion oil should be injected to keep the bed temperature steady. If the fire gets out of control and threatens the safety of the equipment, the feed to the equipment as well as the discharge of materials can be stopped, and an evacuation should be organized.

If the seal of the slurry pump is leaking and on fire, do not panic first; handle the situation according to its severity. If a minor leak is detected, stop the pump, close the inlet and outlet valves, and start the standby pump. If the leakage is severe and out of control, contact the electrical department to shut down all operating pumps in the pump room; activate a steam shield to provide protection. The operators on site should close the outlet valves of the heat exchangers located nearest to the pumps at the bottom of the tower. Water should be sprayed at the location of the leakage from outside the window to aid in the condensation of the oil slurry. Start the internal operations to activate all reflux streams, control the temperature at the top of the tower; reduce the amount of feed used in the reverse and regeneration processes, and pay attention to controlling the preheating of the raw materials.

Everything mentioned above is great, but in actual production, how many people can truly remain calm in emergencies, especially when an oil slurry pump catches fire? I think it’s better to deal with it early rather than let the situation escalate. 1. Cut the reaction material, maintain fluidization, and control the bed temperature properly. 2. Stop the slurry pump to control the fire. 3. Stop the feed pump (the line feeding the unit).

How to handle a fire caused by leakage in the seal of an slurry pump. Symptoms: 1. Yellow smoke is emitted from the seal area of the slurry pump, along with oil and gas leaks； 2. On-site combustible gas alarm triggers an alert ； 3. Fire at the seal ； 4. The outlet flow and pressure of the slurry pump may change. Processing steps: 1. Immediately switch the pump to the backup pump ； 2. Close the inlet and outlet valves of the operating pump as well as the seal oil supply for the pump ； 3. Take self-rescue measures and use fire extinguishers correctly to put out fires ； 4. Report the fire promptly and accurately based on the situation of the fire ； 5. Cool the leak site with cooling water, doing your best to cause it to solidify ； 6. Increase the amount of slurry discharged outside ； 7. If it is not possible to close the inlet and outlet valves of the pump, and the fire cannot be controlled, an emergency shutdown must be carried out ； 8. If the fire threatens other areas and is difficult to control, then cut off the extraction valve for the T-201 bottom slurry, stop all pumps in P-208, halt the slurry circulation, and put all systems on shutdown mode. Handling principles: 1. If the area where the leak occurs is on fire, while taking measures to save yourself, you should call the fire department promptly ； 2. The backup pump must be switched in immediately, and the inlet and outlet valves of the operating pump should be closed. Precautions ； 1. During processing, each system should maintain the corresponding operations ； 2. Strictly control the fire area to prevent it from spreading ； 3. If the feed is interrupted, handle it in accordance with the feed interruption plan

Thank you all, experts; I finally understand a bit more now