Do you know anything about the liquefied gas desulfurization process?
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Looking at a process flow diagram, poor liquid is used as the desulfurization agent for liquefied gas desulfurization. Before entering the liquefied gas desulfurization tower, there is a liquefied gas feed pump that uses a BB5 type; the temperature is 40°C and the pressure increases from 1.2 MPa to 3.23 MPa. Why does this pump require such high pressure? What is the purpose of that? After the liquefied gas is desulfurized, washing is carried out; behind the amine separation tank, there is a pump for circulating the water at the bottom of that tank. Why is such circulation necessary?
I’m not an expert in process engineering; could you tell me why the pressure inside the desulfurization tower needs to increase so much all of a sudden?
The pressure increased from 1.2 MPa to 3.23 MPa
Higher pressure and lower temperature are more conducive to the absorption of hydrogen sulfide by the amine solution, so it is necessary to increase the operating pressure. Is water washing the next step after the amine solution separation tank? Isn’t lean liquid being used?