High temperature in the three-in-one flue gas absorption tower
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This post was last edited by sunjl1981 on 2013-1-6 at 23:39. The temperature in the exhaust gas absorption tower of the three-in-one synthesis furnace is high, but the temperature of the acid produced by the synthesis furnace is normal while the acid concentration is not up to standard. If the amount of water used for absorption in the synthesis furnace is reduced, the temperature in the exhaust gas absorption tower becomes even higher. What should be done in this situation? Thank you! # hcbbs
Check the liquid separation head of the synthesis furnace; it may be damaged or contain foreign objects, resulting in uneven liquid separation.
The last edit to this post was made by yzhms on 2009-8-7 at 14:11. A high temperature in the exhaust gas absorption tower indicates that a large amount of HCl is entering it; therefore, it is necessary to carefully check the absorption process in the three-in-one furnace as well as the water distribution；
This post was last edited by yzhms on 2009-8-7 at 14:15. The temperature of the dilute acid coming out of the flue gas tower is high, and a large amount of HCl gas is absorbed in that tower, which indicates a problem with the absorption process in the synthesis furnace. The normal temperature of the acid exiting the tower simply shows that there is no issue with the cooling system of the synthesis furnace. What was said on the second floor is correct: it might be that the liquid distribution head is damaged or there are foreign objects present, causing uneven liquid distribution. Pay special attention to the liquid separation tray; it’s also possible that the synthesis furnace is not installed vertically, resulting in flow deviation
A similar situation occurred not long ago: 1. The temperature of the acid flow at stage 3 was high； 2. The acid flow temperatures at levels 1 and 2 are low, as is the temperature of the cooling water at the outlet ； 3. The acid concentration is normal. The analysis shows a decrease in the absorption efficiency at the first and second stages, with a large amount of hydrogen chloride entering the third absorption stage. Inspection revealed blockages in the water flow paths of the primary and secondary towers, resulting in poor cooling efficiency and a decrease in absorption rate. It’s normal after processing. The majority of the hydrogen chloride gas should be absorbed in the first stage. Level 3 involves only minimal absorption. The temperature at level 3 shouldn’t be high.
The synthesis furnace is not absorbing well; check the synthesis furnace. Increase the circulating water in the exhaust tower
What was said upstairs is correct; there is another possibility: the primary and secondary absorption towers may be damaged, allowing cooling water to enter these towers. This results in the acid output having an unacceptable concentration. However, due to uneven water inflow from the leaks, the hydrogen chloride absorption rate is not sufficient, and a large amount of hydrogen chloride ends up entering the tertiary tower for absorption, causing its temperature to rise excessively. Although this possibility is relatively low, it cannot be ruled out if the furnace head is found to be in good condition.