【Daily Question】20150713 Knowledge related to boiler flue gas (2 wealth points for replies + additional 3 wealth points for correct answers)
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This post was last edited by dongjiang1001 on 2015-7-15 at 10:08. To increase popularity in the boiler area and meet the requirements of the region, the 【One Question per Day】 activity is launched to foster technical exchanges, liven up the atmosphere, and offer rewards; all members are welcome to participate actively. Reducing the excess air coefficient in the furnace increases the exhaust gas temperature, thereby increasing the heat loss due to exhaust gases. ( ) Answer: Incorrect. Reply in the comments with the answer you think is correct (for true/false questions, an additional 3 points will be given for a correct answer). 1. Participating in answering questions + 2 wealth points (set to automatically add wealth) ； 2. No additional points will be given for incorrect answers; comments will provide the correct answer for reference ； 3. +3 points to wealth if the reply is correct ； 4. When responding, provide a detailed explanation and analysis of the question or answer; depending on the quality of the response, an additional reward of 3 to 15 points in wealth will be given ； 5. Replies with correct answers and accurate explanations will be designated as the best reply (best assistance). Note: We will close this post after 72 hours to reveal the answers and explanations, as well as the best response (the best help).
Reducing the excess air coefficient in the furnace increases the exhaust gas temperature, thereby increasing the heat loss due to exhaust gases. (Wrong), it should be to reduce the heat loss from exhaust smoke.
Correct answer: Reducing the excess air coefficient in the furnace increases the exhaust gas temperature, thereby increasing the heat loss due to exhaust gases. ( × )
Error----------------
Reducing the excess air coefficient in the furnace increases the exhaust gas temperature, thereby increasing the heat loss due to exhaust gases. (Correct)
Reducing the excess air coefficient in the furnace increases the exhaust gas temperature, thereby increasing the heat loss due to exhaust gases. ( x )
This judgment is incorrect. When the oxygen content in the flue gas decreases, the volume of flue gas also decreases. Since there are no changes in the boiler’s convective heating surfaces or economizers, the temperature of the flue gas should decrease as well. For these reasons, by reducing the oxygen content in the flue gas (i.e., by increasing the air excess factor), the overall thermal efficiency of the boiler increases!
Reducing the excess air coefficient in the furnace increases the exhaust gas temperature, thereby increasing the heat loss due to exhaust gases. (Mistake) It should be to reduce the heat loss from exhaust smoke
Reducing the excess air coefficient in the furnace increases the exhaust gas temperature, thereby increasing the heat loss due to exhaust gases. (Mistake)