What is the acid temperature in the second absorption tower?
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Dear sir/madam, could you please inform me of the acid temperature at the inlet and outlet of your second absorption tower? In our company, it is 7°C – I’m not sure if this meets the requirements
Flue gas inlet and outlet of the second absorption tower: temperature 174–63 degrees, pressure 4.24–0.09 kPa; acid temperature at the top and bottom: 63–95 degrees, flow rate: 293 cubic meters per hour
The temperature of the acid in the absorption tower is 70 degrees, while it is 42 degrees in the drying tower
The inlet temperature of the second absorption tower is 186.5 degrees Celsius, the pressure is 1.865 kPa, and the acid temperatures are 72.7 and 65.6 degrees Celsius
I Love Chemical Engineering, published on 2010-11-17 11:25
So do you mean that the flow rate is not sufficient, and we need to increase the flow rate to the upper tower of the second absorption tower?
Reply to the original poster: A temperature difference of 7 degrees is quite significant. The heat generated in the second absorption tower accounts for only about 7% of the total heat required for sulfuric acid production, which is about 2% more than that required for drying.
In summer, the temperature at the inlet of our two absorber towers is 63 degrees, while it’s 101 degrees at the outlet. Isn’t that even more abnormal? Could some experienced engineer please analyze this?
On page P692 of \"Sulfuric Acid Production Technology\", it is stated that \"the increase in the temperature of sulfuric acid inside the absorption tower is generally between 15 and 30 degrees.\" Of course, this also depends on the spraying density and the circulation volume. In my opinion, for a system with two stages of reaction and two stages of absorption, the conversion rate in each stage is over 90%, while in the second stage it is less than 10%. With such a low load, there shouldn’t be so much heat generated – could there be some problem with the gauge or its installation location? Hehe, just my personal opinion! !
The temperature of imported acid is generally around 50–55 degrees, while that of the exported acid is usually no higher than 70 degrees.
We keep it between 70 and 75 degrees