【Q&A Question 150】May 30, 2017
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This post was last edited by 955559 on 2017-7-21 at 22:50. Wishing everyone a happy Dragon Boat Festival~~~ [Q&A Question 150] May 30, 2017: How should excessive temperature on the reactor wall be handled? The reference answer can be seen after responding; points will be awarded for identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) 1. Lower the reaction temperature and reduce the processing volume appropriately to operate the equipment under light load. 2. Use a surface thermometer to measure the wall temperature of the reactor and identify areas where it is excessively high. 3. If the wall temperature continues to rise and the color range of the colored paint expands further, prepare to shut down the operation. Scoring criteria: Incorrect answers earn 2 wealth points; *incomplete* answers earn 3–8 points. Correct answers with detailed explanations and supplementary *answers* earn 15–20 wealth points. Please score according to these criteria. Note: If there are editing records after answering, only points will be awarded to those who participated. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters that have nothing to do with the answer are all considered malicious spamming; points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html
Reduce the reactor inlet temperature and adjust the operation; while lowering the reactor inlet temperature, promptly turn on the four streams of cold hydrogen to reduce the temperature in each layer of the reactor. While injecting cold hydrogen into the reactor, pay close attention to the changes in the circulating hydrogen compressor and the circulation volume. If the over-temperature is severe, shut down the reactor burner, inject quench hydrogen into each bed layer to lower its temperature, and depressurize the reaction system by venting it to the flare system. The distillation section continues to operate; if the temperature exceeds a critical level, the unit switches to cyclic operation.
Add cooling surfaces and use a coolant to reduce the temperature.
1. Reduce the reaction temperature and appropriately lower the processing volume to operate the equipment under light load. 2. Use a surface thermometer to measure the wall temperature of the reactor and identify areas with abnormally high temperatures
Increase the amount of quench hydrogen, lower the reactor inlet temperature, reduce the feed rate, and perform emergency pressure relief in case of severe overheating
Reduce the temperature and volume; if the temperature remains high, the insulation material inside the reactor could be damaged! Shut down for repair!
1. Lower the reaction temperature and appropriately reduce the processing volume to operate the equipment under light load. 2. Use a surface thermometer to measure the wall temperature of the reactor and identify areas with abnormally high temperatures. 3. If these temperatures continue to rise, operations must be stopped for corrective action.
It is necessary to objectively analyze the causes, formulate measures, and take shutdown actions if required.