【Daily Question No. 310】November 12, 2018
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【Daily Question No. 310】November 12, 2018: Briefly describe the reasons for furnace tube burnout How to handle it? Reason: (1) Local overheating of the furnace tube, with the flame hitting the tube directly, resulting in coking of the tube; at the same time, the coked areas get burned through. (2) The furnace tube material is of poor quality, or it suffers from high-temperature oxidation as well as erosion and corrosion by the medium, resulting in pitting or cracks. Action taken: It was found that the furnace tube had burned through, so an emergency shutdown was initiated. (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
Reason: Severe coking of the furnace tubes； Excessively high furnace temperature and low furnace exit temperature reading ； The flame hits the furnace tubes directly, causing localized overheating ； The processing volume is too high; the furnace is overloaded ； The quality of the furnace tube is poor ； The furnace tube has been in use for too long or is severely corroded.
Reason: (1) Local overheating of the furnace tube, with the flame hitting the tube directly, resulting in coking of the tube; at the same time, the coked areas get burned through. (2) The furnace tube material is of poor quality, or it suffers from high-temperature oxidation as well as erosion and corrosion by the medium, resulting in pitting or cracks. Action taken: It was found that the furnace tube had burned through, so an emergency shutdown was initiated.
(1) Local overheating of the furnace tube, with the flame hitting the tube directly, resulting in coking on it; at the same time, the coked areas get burned through. (2) Poor quality of the furnace tube material, or high-temperature oxidation, along with erosion and corrosion caused by the medium, lead to the formation of pores or cracks. Emergency shutdown is necessary.
Answer: Reasons: (1) Local overheating of the furnace tube, with the flame hitting the tube directly, resulting in coking; at the same time, the coked areas get burned through. (2) Poor quality of the furnace tube material, or high-temperature oxidation, along with erosion and corrosion by the medium, cause pitting or cracks； Handling: In the event of a furnace tube burnout, follow the emergency shutdown procedures.
1. Local overheating of the furnace tube, with the flame hitting the tube directly, causes coking on it; at the same time, the coked area gets burned through. 2. Poor quality of the furnace tube, along with high-temperature oxidation, as well as erosion and corrosion caused by the medium, can lead to pitting or cracks. Treatment: Immediate shutdown
Reasons: (1) Local overheating of the furnace tube, with the flame hitting the tube directly, resulting in coking on the tube while the coked areas are burned out. (2) Poor quality of the furnace tube material, or high-temperature oxidation, along with erosion and corrosion by the medium, cause pitting or cracks. Handling: When the furnace tube runs out of material, handle it according to the emergency shutdown procedure.
Reasons: (1) Local overheating of the furnace tube, with the flame hitting the tube directly, resulting in coking; at the same time, the coked areas get burned through. (2) Poor quality of the furnace tube material, or high-temperature oxidation, along with erosion and corrosion by the medium, cause pitting or cracks. Handling: When the furnace tube is burned through, emergency shutdown procedures should be followed.
Reason 1) Severe coking of the furnace tubes. 2) The furnace temperature is too high. 3) The flame directly hits the furnace tubes, causing localized overheating. 4) The quality of the furnace tubes is poor. 5) Oxidative peeling or corrosion-induced thinning of the furnace tubes. Treatment method: 1) When the condition is not severe, handle it as a normal shutdown, but production must not be continued. 2) Due to severe ignition, immediate emergency shutdown measures were taken: oil supply to the furnace was stopped, and the steam injection volume was increased. 3) Use steam to extinguish the fire inside the furnace. 4) Fully open the flue dampers. 5) The fan is shut down. 6) If the air ducts or the furnace bottom catch fire, steam should be used to extinguish the fire. 7) The radiant furnace tubes need to be thoroughly cleaned.
(1) Local overheating of the furnace tube, with the flame hitting the tube directly, causes coking on it; at the same time, the coked area gets burned through. (2) The furnace tube material is of poor quality, or it suffers from high-temperature oxidation as well as erosion and corrosion by the medium, resulting in pitting or cracks. Action taken: It was found that the furnace tube had burned through, so an emergency shutdown was initiated.
Reasons: (1) Local overheating of the furnace tube, with the flame hitting the tube directly, resulting in coking; at the same time, the coked areas get burned through. (2) Poor quality of the furnace tube material, or high-temperature oxidation, along with erosion and corrosion by the medium, cause pitting or cracks. Treatment: When the furnace tube is burned through, emergency shutdown procedures should be followed.