Pressure difference issue in the desulfurization tower
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Does the gas temperature at the tower inlet affect the pressure difference? How can this be solved?
If the temperature of the gas entering the desulfurization tower is too high, it will also result in a large pressure difference between the inlet and outlet of the tower; this pressure difference is caused by the temperature difference. The solution is to reduce the temperature of the gas entering the desulfurization tower to a normal level, around 35°C.
The key point is that my inlet temperature to the tower is normal, but any drop in outside temperature affects the pressure difference
The high temperature of the gas entering the tower, along with a high amount of saturated water vapor, causes an imbalance in the system’s water balance; this leads to an increase in the level of the desulfurization solution, changes in its composition, and reduced desulfurization efficiency. Over time, this can also result in an increase in the pressure difference inside the tower. Of course, there would be no significant change in the pressure difference at that time.
A large temperature and pressure difference; reducing the temperature is key
Poor solution absorption is also a major cause of the increase in pressure difference. The ultimate solution still lies in improving the components of the solution.
This post was last edited by Chemical Gas Purification on 2010-11-13 at 17:13. The original poster might want to check what the gas flow rate is during desulfurization when the temperature is low, and whether it is higher than when the temperature is high. At lower temperatures, the blower has a greater capacity to pump air, and the compressor has a stronger ability to draw in gas; this results in a higher gas flow rate, which in turn increases the pressure difference in the desulfurization tower
This post was last edited by Chemical Gas Purification on 2010-11-13 at 17:18. The original poster mentioned that a pressure difference occurs when the temperature drops, but this does not rule out the possibility that the formation of by-product salts upon temperature reduction could also cause a pressure difference.
I use filtered water with very low levels of residual salts
Low external temperatures can lead to a decrease in the desulfurization efficiency, while a reduced flow rate of the desulfurization fluid within the tower results in an excessive pressure difference