Sulfur Recovery Daily Question 2018.12.22
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What is the effect of the MDEA concentration in the solvent on the flue gas desulfurization efficiency? Answer: When the exhaust gas and solvent come into counter-current contact in the absorption tower, the higher the concentration of methyldiethanolamine in the solvent, the lower the vapor load on the solvent and the better the desulfurization effect of the exhaust gas. However, the absorption process of H2S is an exothermic reaction; the higher the solvent concentration, the more heat is released during this absorption process, and the greater the rise in the solvent’s temperature. As a result, this actually reduces the H2S adsorption efficiency; therefore, the concentration of the solvent cannot be too high nor too low. The solvent concentration is generally determined by the design parameters of the regeneration tower, and in this system the weight concentration of MDEA in the solvent is around 30%.
The temperature of the gas phase returning to the tower should be controlled as follows: when the exhaust gas and solvent come into counter-current contact within the absorption tower, the higher the concentration of methyl diethanolamine in the solvent, the greater the gas-phase load on the solvent
The concentration of the amine solution has a direct impact on the efficiency of desulfurization. When the concentration of the amine solution remains stable, increasing its circulation rate can improve desulfurization results; however, this circulation rate should not be too high. It must be balanced with the flow rates of dry gas and liquefied gas, otherwise it will lead to unnecessary waste of amine solution, as well as increased consumption of electricity, water, and steam. The amine solution concentration seems to be an unimportant parameter, as when the concentration is high, the circulation rate of the amine solution can be reduced appropriately; whereas when the concentration is low, the circulation rate can be increased. However, when the efficiency of the tower plates is not very high, whether the amine solution concentration is high or low affects the gas-liquid contact, as well as the amine solution’s ability to absorb H2S, which in turn impacts the desulfurization efficiency
The temperature of the gas phase returning to the tower should be controlled as follows: when the exhaust gas and solvent come into counter-current contact within the absorption tower, the higher the concentration of methyl diethanolamine in the solvent, the greater the gas-phase load on the solvent
Answer: When the exhaust gas and solvent come into counter-current contact in the absorption tower, the higher the concentration of methyl diethanolamine in the solvent, the lower the vapor load on the solvent and the better the desulfurization effect of the exhaust gas. However, the absorption of H2S is an exothermic reaction, so the higher the solvent concentration…
The concentration of the amine solution has a direct impact on the efficiency of desulfurization. When the concentration of the amine solution remains stable, increasing its circulation rate can improve desulfurization results; however, this circulation rate should not be too high. It must be balanced with the flow rates of dry gas and liquefied gas, otherwise it will lead to unnecessary waste of amine solution, as well as increased consumption of electricity, water, and steam. The amine solution concentration seems to be an unimportant parameter, as when the concentration is high, the circulation rate of the amine solution can be reduced appropriately; whereas when the concentration is low, the circulation rate can be increased. However, when the efficiency of the tower plates is not very high, whether the amine solution concentration is high or low affects the gas-liquid contact, as well as the amine solution’s ability to absorb H2S, which in turn impacts the desulfurization efficiency
When the exhaust gas and solvent come into counter-current contact in the absorption tower, the higher the concentration of methyl diethanolamine in the solvent, the lower the vapor load on the solvent and the better the desulfurization effect of the exhaust gas. However, the absorption of H2S is an exothermic reaction, and the higher the solvent concentration
When the exhaust gas and solvent come into counter-current contact in the absorption tower, the higher the concentration of methyl diethanolamine in the solvent, the lower the vapor load on the solvent and the better the desulfurization effect of the exhaust gas. However, the absorption of H2S is an exothermic reaction; the higher the solvent concentration, the more heat is released during the adsorption process, and the greater the rise in the solvent’s temperature. As a result, this actually reduces the H2S adsorption efficiency; therefore, the concentration of the solvent cannot be too high nor too low. The solvent concentration is generally determined by the design parameters of the regeneration tower, and in this system the weight concentration of MDEA in the solvent is around 30%.
When the exhaust gas and solvent come into counter-current contact in the absorption tower, the higher the concentration of methyl diethanolamine in the solvent, the lower the vapor load on the solvent and the better the desulfurization effect of the exhaust gas. However, the absorption of H2S is an exothermic reaction; the higher the solvent concentration, the more heat is released during the adsorption process, and the greater the rise in the solvent’s temperature. As a result, this actually reduces the H2S adsorption efficiency; therefore, the concentration of the solvent cannot be too high nor too low. The solvent concentration is generally determined by the design parameters of the regeneration tower, and in this system the weight concentration of MDEA in the solvent is around 30%.
When the exhaust gas and solvent come into counter-current contact in the absorption tower, the higher the concentration of methyl diethanolamine in the solvent, the lower the vapor load on the solvent and the better the desulfurization effect of the exhaust gas. However, the absorption of H2S is an exothermic reaction; the higher the solvent concentration, the more heat is released during the adsorption process, and the greater the rise in the solvent’s temperature. As a result, this actually reduces the H2S adsorption efficiency; therefore, the concentration of the solvent cannot be too high nor too low. The solvent concentration is generally determined by the design parameters of the regeneration tower, and in this system the weight concentration of MDEA in the solvent is around 30%.
When the exhaust gas and solvent come into counter-current contact in the absorption tower, the higher the concentration of methyl diethanolamine in the solvent, the lower the vapor load on the solvent and the better the desulfurization effect of the exhaust gas. However, the absorption of H2S is an exothermic reaction; the higher the solvent concentration, the more heat is released during the adsorption process, and the greater the rise in the solvent’s temperature. As a result, this actually reduces the H2S adsorption efficiency; therefore, the concentration of the solvent cannot be too high nor too low. The solvent concentration is generally determined by the design parameters of the regeneration tower, and in this system the weight concentration of MDEA in the solvent is around 30%.