Steam temperature of hydrogen sulfide removal stripping tower
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Hello everyone. The feed temperature for the hydrogen sulfide removal stripping tower in our facility is 240°C, and steam with a pressure of 1.0 MPa is used for stripping. The temperature of this 1.0 MPa steam is sometimes even lower than 240°C; as a result, the temperature of the steam entering the stripping tower is below that of the feed oil. Will the condensation of this steam cause water to be carried in the oil? Should the steam pressure be changed from 1.0 MPa to 3.5 MPa?
It’s necessary; otherwise, the stripping effect cannot be achieved. However, after making the change, the injection volume needs to be determined through design calculations
The saturation steam temperature at 1.0 is only around 180°C; you either need to use superheated steam at the same pressure level. If a saturated steam temperature of 3.5 is used, it’s generally above 250°C, which should suffice to meet your needs!
If it is saturated steam, it may contain water; in that case, it can be replaced with superheated steam
1.0 MPa superheated steam can be used. As long as steam stripping is used, there will be a problem of water in the product; steam stripping is primarily used to remove hydrogen sulfide from the bottom product of the tower, and the amount of steam required is not large. The operation of the stripping tower requires comprehensive consideration of factors such as feed temperature, bottom temperature, top pressure, the amount of stripping steam injected, and changes in the top liquid level. An increase in feed temperature and bottom temperature helps to prevent water contamination in the product.
Your feed temperature is so high. . . . We’re almost at the bottom of the distillation tower
Your feed temperature is too high; aren’t you worried that the light components will all be stripped away?
We feed 209-degree, 1.0 MPa low-pressure steam into the reboiler to produce superheated steam, with the temperature entering the tower being above 300 degrees
The stripping steam used in the stripper is 1.0 MPa steam, but this does not mean that the steam remains at 1.0 MPa once it enters the tower; the actual steam pressure will not exceed the pressure at the top of the tower. As a result, its saturation temperature is below 240°C, so the oil product only heats the steam without causing condensation.