The feed temperature of the regeneration tower should not be too high; it should be kept between 90–95 °C to prevent an increase in H2S emissions.
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This post was last edited by liaifeng on 2018-9-10 at 20:51. The feed temperature of the rich liquid entering the regeneration tower should not be too high; it should be kept between 90–95 °C to prevent an increase in H2S emissions. Excessive hydrogen sulfide release at >100°C: is it to prevent the accumulation of hydrogen sulfide at the top or for some other reason?
This is mainly due to the fact that at temperatures above 100°C, the amount of water vaporizing is high, resulting in an increase in the reflux flow at the top of the tower. Since regenerators are designed with full reflux, this increases the reflux load and thus corrosion. Moreover, at high temperatures, the liquid stream undergoes a slight flashing process when passing through the control valve; higher temperatures lead to an increased amount of flashing, which in turn increases gas resistance. Personal understanding
Control the heat conditions of the feed to prevent deterioration of local hydraulic conditions, which could lead to a reduction in the overall efficiency of the tower or even adverse operating conditions.
Our requirement here is a temperature of not less than 100°C.....