Ethylene Plant Knowledge (Technology) Questions 12.31

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Ethylene Plant Knowledge (Technical) Test 12.31. Everyone is welcome to actively participate in the learning and discussion of fundamental professional knowledge in the Petrochemical Technology Exchange Forum! At the same time, I hope other moderators will also participate in this activity, taking turns to come up with questions and discuss various sets of devices! Let’s work together to promote the development of the petrochemical technology exchange zone! The maximum score for this activity is 20 Wealth points. Friendly votes and repeated voting are not allowed; please be careful when posting. Posts that are edited will not be counted as valid votes! Those who have different opinions on the suggested answers can post discussions the next day, and those who provide solutions or their own opinions regarding the daily question will receive appropriate rewards! The focus is on participation, and there are prizes for participating! To prevent the responses of some members from influencing others, please hide your posts when answering questions. Thank you for your cooperation. For specific hiding methods, see: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 Thank you all for your participation! Learn more*, communicate more, gain more! True or False: 1. When parking, it is necessary to monitor the liquid levels in each tank to ensure they are not too high, as this could lead to localized overpressure and cause the safety valves to activate. 2. When the unit is shut down, the dry flare tank should be monitored to ensure that the liquid discharge evaporator is operating properly. If there is a liquid level in the dry flare tank, it indicates that the liquid discharge rate of the plant is normal. 3. When shutting down the pyrolyzer and cooling it down, there is no need to maintain a certain heating rate as when starting it up; to save time, the cooling process can be accelerated as much as possible. 4. 3 to 4 days before all cracking furnaces stop receiving oil feed, the viscosity of the quench oil should begin to be reduced gradually. 5. When preparing the shutdown network plan for the ethylene plant, the drainage of the refrigeration compressor and the operation of the nitrogen in the cracking gas compressor can be treated as parallel processes. 6. When optimizing the shutdown plan for an ethylene plant, network planning techniques should be fully utilized to achieve an optimal combination of schedule, cost, and resources. 7. Emptying and replacement is an important step before the equipment is taken out for maintenance, and it is also one of the key aspects of optimizing the shutdown procedure. 8. A network plan can have only one critical path. 9. Generally, in the shutdown network plan for ethylene plants, the isolation of the ethylene distillation column is the starting point of the network diagram. 10. After the turbine trips, turning the handwheel in a clockwise direction is done to close the emergency shut-off valve (TTV). 1 (√), 2 (×) indicates that the liquid discharge rate of the device exceeds its evaporation capacity, and it is necessary to reduce the liquid discharge rate. 3 (×) The fan dampers and burner air valves should be adjusted according to the actual conditions, in order to control the cooling rate and prevent it from being too fast. 4 (√), 5 (√), 6 (√), 7 (√), 8 (×) A network plan can have one critical path or it can have multiple critical paths. 9 (√), 10 (×) are to reset the emergency shut-off valve (TTV).