【Q&A Question 137】2017.05.17
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This post was last edited by 955559 on 2017-7-21 22:54. [Q&A Question 137] May 17, 2017: What are the reasons for high CO levels in flue gas and how to address them? The reference answers 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.) For a furnace with complete combustion, there should be no CO in the flue gases. If CO is present in the flue gases, it indicates incomplete combustion; the main reason for this is poor air supply, which results in inadequate atomization of the fuel. This leads to a darker furnace interior, red flames, or black smoke coming from the chimney. When CO is present in the flue gases, it is necessary to adjust the \"three valves and one plate\" to improve the conditions for atomization, thereby ensuring complete combustion of the fuel. 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 if the answer is correct but lacks sufficient details. Please score according to these criteria. Note: If there are editing records after answering, only those who participated will be given points. 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
If the fuel burns completely in the furnace, the flue gas will not contain carbon monoxide. If carbon monoxide is present in the flue gas, it indicates incomplete combustion; the main reasons for this are insufficient air supply, a dark furnace interior, red flames, or black smoke, with CO present in the flue gas. Measure: Adjust the three doors with plates to ensure complete combustion of the fuel.
In a furnace where combustion is complete, there should be no CO in the flue gases. If CO is present in the flue gases, it indicates incomplete combustion; the main reason for this is poor air supply, which results in inadequate atomization of the fuel, a darker furnace interior, red flames, or black smoke coming from the chimney. When CO is present in the flue gases, it is necessary to adjust the \"three valves and one plate\" to improve the atomization conditions and ensure complete combustion of the fuel.
Incomplete combustion, incorrect analysis; adjust the dampers and oxygen level, and improve analytical testing
Reason: Incomplete combustion； Treatment: Reduce the damper opening to supplement air volume
1) Poor furnace sealing； 2) The damper opening is too large ； 3) The flue damper opening is too large ； 4) The negative pressure in the furnace is too high, allowing a large amount of air to leak into the furnace and resulting in an excessively high oxygen content in the flue gases.
Insufficient air volume, low oxygen content; increased fuel feed, low temperature
Inadequate combustion; increase the air flow rate or use flue gas dampers to improve it
If the fuel burns completely in the furnace, the flue gas will not contain carbon monoxide. If carbon monoxide is present in the flue gas, it indicates incomplete combustion, and the main reason for this is insufficient air supply. If the furnace becomes dark, the flame turns red, or black smoke emerges from the chimney, CO will be present in the exhaust gases; in such cases it is necessary to adjust the \"three valves and one plate\" to ensure complete combustion of the fuel.
I really don’t know. Participate. :lol