【Q&A Question 129】2018.05.09
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This post was last edited by Internet Invisible Man on 2018-5-9 08:52. [Q&A Question 129] 2018.05.09: Briefly describe how to handle fluctuations in the reactor bed temperature When the temperature of the reactor bed fluctuates, the cause should be identified based on actual production conditions and appropriate actions taken: ① Stabilize the outlet temperature of the reaction feed heater ； ②Stabilize the properties of the crude oil and enhance dehydration ； ③Analyze the purity of new hydrogen and recycled hydrogen; when the purity is low, increase the amount of waste hydrogen emitted ； ④Adjust the amount of cold hydrogen ； ⑤The reaction temperature is adjusted according to the activity of the catalyst to meet the requirements of the product. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below. The APP short-video skill competition has begun! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
When the temperature of the reactor bed fluctuates, the cause should be identified based on actual production conditions and appropriate actions taken: ① Stabilize the outlet temperature of the reaction feed heater； ②Stabilize the properties of the crude oil and enhance dehydration ； ③Analyze the purity of new hydrogen and recycled hydrogen; when the purity is low, increase the amount of waste hydrogen emitted ； ④Adjust the amount of cold hydrogen ； ⑤The reaction temperature is adjusted according to the activity of the catalyst to meet the requirements of the product.
When the temperature of the reactor bed fluctuates, it is necessary to identify the cause based on actual production conditions and take appropriate actions: ① Stabilize the temperature at the outlet of the reaction feed heater; ② Stabilize the properties of the feed oil and enhance dehydration; ③ Analyze the purity of the fresh hydrogen and recycled hydrogen; if the purity is low, increase the amount of waste hydrogen discharged; ④ Adjust the amount of cold hydrogen used; ⑤ Adjust the reaction temperature according to the activity of the catalyst to meet the requirements of the product.
When the temperature of the reactor bed fluctuates, the cause should be identified based on actual production conditions and appropriate actions taken: ① Stabilize the outlet temperature of the reaction feed heater； ②Stabilize the properties of the crude oil and enhance dehydration ； ③Analyze the purity of new hydrogen and recycled hydrogen; when the purity is low, increase the amount of waste hydrogen emitted ； ④Adjust the amount of cold hydrogen ； ⑤The reaction temperature is adjusted according to the activity of the catalyst to meet the requirements of the product.
The reactor inlet temperature can be appropriately increased to solve this issue； When the catalyst activity at the inlet decreases or the composition of the feed materials changes, reaction lag occurs (no reaction at the front end, and reaction starts upon reaching the high-temperature bed), which leads to fluctuations in the bed temperature
When the temperature of the reactor bed fluctuates, the cause should be identified based on actual production conditions and appropriate actions taken: ① Stabilize the outlet temperature of the reaction feed heater； ②Stabilize the properties of the crude oil and enhance dehydration ； ③Analyze the purity of new hydrogen and recycled hydrogen; when the purity is low, increase the amount of waste hydrogen emitted ； ④Adjust the amount of cold hydrogen ； ⑤The reaction temperature is adjusted according to the activity of the catalyst to meet the requirements of the product.
When the temperature of the reactor bed fluctuates, the cause should be identified based on actual production conditions and appropriate actions taken: ① Stabilize the outlet temperature of the reaction feed heater； ②Stabilize the properties of the crude oil and enhance dehydration ； ③Analyze the purity of new hydrogen and recycled hydrogen; when the purity is low, increase the amount of waste hydrogen emitted ； ④Adjust the amount of cold hydrogen ； ⑤The reaction temperature is adjusted according to the activity of the catalyst to meet the requirements of the product.
①Adjust the reactor inlet temperature as appropriate based on the temperature rise; if the rise is too high, the inlet temperature can be reduced accordingly. ②Changing the circulation time takes too long; impurities in the feed oil are reduced, and the temperature rise is minimal, allowing the reactor inlet temperature to remain constant. ③The purity of the recycled hydrogen should be >75%, and the flow rate of the recycled gas must be kept stable. ④Maintain stable system pressure. ⑤Decide whether to shut down based on the properties of the generated oil. ⑥Maintain stable feeding. ⑦If increasing the reactor inlet temperature does not result in a significant rise in temperature, operations should be stopped, and the catalyst should be regenerated or replaced. ⑧Enhanced dehydration of the crude oil buffer tank. ⑨Stabilize the reactor inlet temperature and improve the operation of the heater. ⑩Strengthen regulation to ensure stable flow rate of quench hydrogen.
:When the temperature of the reactor bed fluctuates, it is necessary to identify the cause based on the actual production conditions and take appropriate action: 1. Stabilize the temperature at the outlet of the reaction feed heater; 2. Stabilize the properties of the crude oil and enhance dehydration. 3. Analyze the purity of fresh hydrogen and recycled hydrogen, and increase the amount of waste hydrogen emitted. 4. Adjust the amount of cold hydrogen. 5. Adjust the reaction temperature according to the catalyst activity
When the temperature of the reactor bed fluctuates, it is necessary to identify the cause based on actual production conditions and take appropriate actions: ① Stabilize the temperature at the outlet of the reaction feed heater; ② Stabilize the properties of the feed oil and enhance dehydration; ③ Analyze the purity of the fresh hydrogen and recycled hydrogen; if the purity is low, increase the amount of waste hydrogen discharged; ④ Adjust the amount of cold hydrogen used; ⑤ Adjust the reaction temperature according to the activity of the catalyst to meet the requirements of the product.
For minor fluctuations, make slight adjustments to the cooling system; also adjust the heating furnace slightly. In case of major fluctuations, make significant changes to the heating furnace, activate the bypass systems around the feed and discharge heat exchangers, and adjust the pressure throughout the system as well as the feed rate according to the situation