Solvent-regenerated amine solution
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The concentration of the amine solution used for solvent regeneration increases over time as a result of this absorption cycle. How should the concentration of the amine solution be determined under normal conditions? How should the mixture be adjusted to reduce the concentration when it increases? What are the impacts on absorption and regeneration? What should be done when the amine solution concentration decreases?
When the concentration is high, make up with deionized water; the concentration of the amine solution should be sampled and analyzed regularly – a rough theoretical calculation is sufficient. If the concentration is too low, it depends on which device it is to be used for; in most cases, sampling will reveal issues with product quality. In such cases, increase the circulation rate and add new solvent. It has little impact on the regeneration process.
When the concentration is low, add fresh solvent; when it is high, just add water. Generally, the concentration should be kept around 30%
Is this on the 4th floor for exchanging deoxygenated water? Is the temperature of the deoxygenated water too high?
Yes, generally deoxygenated water is used to avoid oxidizing the solvent
The temperatures of deoxygenated water and condensate water are around 100°C, which is far from the temperature required for thermal degradation; both types of water can be used. We do not add demineralized water, as its high oxygen content can cause the solvent to oxidize and foam!
The testing facilities in each company can be used to analyze concentrations; when the concentration is high, it is possible to add demineralized water or condensed water after cooling by steam. At a certain concentration level, the higher the concentration, the more effective desulfurization becomes. At low concentrations, fresh solvent should be added.