【Q&A Question 179】2017.06.28
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This post was last edited by 955559 on 2017-7-21 23:04. [Q&A Question 179] June 28, 2017: How should an interruption in the feed to the heating furnace be handled? The reference answer can be seen after *replying*; points will be awarded for identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Note: For questions of the type \"one question per day,\" if a person replies continuously for a month, that is, posts more than 30 times, their score will be assigned as 2 points, which is the lowest possible score. Click once to reply; if multiple replies are made, points will be awarded as appropriate, as deleting posts is also a waste of time. (1) Immediately reduce the fuel valve to control a small flame. (2) Strengthen the monitoring of the furnace chamber and outlet temperature to prevent overheating of the furnace chamber. (3) Resume feeding as soon as possible; if conditions permit, maintain the flow of the process medium. (4) Once the feed is restored, raise the temperature at the normal rate to reach the process specifications. Scoring criteria: 2 Wealth points for incorrect attempts; 3–8 points for *incomplete* answers. 10 Wealth points for correct answers, provided with detailed explanations; 15–20 Wealth points for correct answers with additional *insufficient* details. 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 starting now) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates starting now) 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 volume and lower the temperature in a timely manner; once feeding returns to normal, restore the heating furnace to its normal operating condition.
⑴ Immediately reduce the fuel valve to control the small flame. ⑵ Strengthen the monitoring of furnace and furnace outlet temperatures. ⑶ Restore feeding as quickly as possible; if conditions permit, maintain the flow of the process medium. ⑷ Once the feed is restored, raise the temperature at the normal rate until the process parameters are met.
Turn off the main burner completely, start the feed pump in emergency mode; if it cannot be started, proceed with shutdown procedures
Phenomenon: The furnace temperature and the temperature at the furnace outlet rise sharply. Solution: a. Turn off the engine promptly; b. Identify the cause and adjust the feed rate accordingly.
(1) The heating furnace with interrupted feeding shuts down rapidly, and steam is supplied behind the feed control valve to protect the furnace tubes; the other heating furnaces cool down quickly. (2) Quickly start the backup pump and adjust it in a timely manner to restore its flow rate. (3) If the feed pump fails to increase flow rate for a short period, it is advisable to reduce the flow rate; the reflux from each column and the side streams should be cooled to maintain proper material balance and pressure ahead of the feed pump, thereby preventing the tower from becoming overfilled. (4) If the feed pump is unable to increase flow rate for an extended period of time and the material balance cannot be maintained, shut down the equipment immediately and proceed with emergency shutdown procedures.
Immediately cut off the fuel to the heating furnace and shut it down! Then find the reason!
1. Turn off the engine in a timely manner； 2. Identify the cause and adjust the feed rate accordingly.
1. Immediately reduce the fuel valve to control a low flame； 2. Strengthen monitoring of the furnace chamber and outlet temperature to prevent overheating of the furnace chamber ； 3. Resume feeding as soon as possible; if conditions permit, maintain the flow of the process medium ； 4. Once feeding is resumed, raise the temperature at the normal rate until the process parameters are reached.
(1) Immediately reduce the fuel valve to control a low flame； (2) Strengthen the monitoring of the furnace chamber and outlet temperature to prevent issues in the furnace chamber ； (3) Resume feeding as quickly as possible; if conditions permit, maintain the flow of the process medium ； (4) Once the feed is restored, raise the temperature at the normal rate until the process parameters are met.
Once the feed is restored, raise the temperature at the normal rate until the process parameters are reached.