What is the main function of the stripping steam in the hydrogen sulfide stripping tower?
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What is the main function of the stripping steam in the hydrogen sulfide stripping tower? The entry of steam reduces the partial pressure between the gas and liquid phases, allowing hydrogen sulfide to pass from the liquid phase to the gas phase, thereby removing hydrogen sulfide. I’m not sure if this explanation is correct What is the impact of the set temperature in the stripping tower on the removal of hydrogen sulfide? Thank you
Your explanation is correct; he did this in order to reduce the partial pressure of hydrogen sulfide in the gas phase, thereby facilitating its precipitation (the partial pressures of all components in the gas phase decrease, not just that of hydrogen sulfide). After injecting stripping steam, the bottom temperature of the tower required to extract the same amount of hydrogen sulfide is relatively lower. Conversely, if the same amount of steam is injected but more hydrogen sulfide is to be extracted, the bottom temperature of the tower must be increased. However, increasing the temperature can also vaporize other light components, so you need to increase the reflux flow rate accordingly to suppress those light components.
A high temperature at the top of the stripper is beneficial for removing hydrogen sulfide.
1. Increase heat content 2. Reduce oil and gas partial pressure