In hydrogenation units, why is the temperature of the rich amine liquid in the desulfurization tower about 5 degrees higher than that of the lean amine liquid?
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In hydrogenation units, why is the temperature of the rich amine liquid in the desulfurization tower about 5 degrees higher than that of the lean amine liquid?
The rich liquid needs to be heated and stripped in order to become a poor liquid
Prevent the light hydrocarbons carried in the recycle gas from cooling down, which could cause foaming of the amine solution
The heat absorbed or released causes the absorbent to warm up
Yes, it absorbs heat, but what is the reaction? What is the reaction equation?
Generally, MDEA reacts with H2S; you can find information by searching on Baidu
What was said upstairs is correct: the heat absorbed and released causes the absorbent to warm up, and at the same time, the temperature of the circulating hydrogen is also around 45°C； So the temperature of the rich liquid will be a bit higher
The temperature of the lean amine solution is 5°C higher than that of the circulating hydrogen, mainly because the circulating hydrogen contains light hydrocarbons, which prevents foaming of the amine solution due to the condensation of these light hydrocarbons.