【Daily Question】Chemical Engineering Principles 220: Distillation Columns (November 1)
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This post was last edited by “Back to Cambridge” on November 10, 2015, at 17:13. Starting today, the Chemical Engineering Theory section is launching the “Question of the Day” activity, aimed at helping everyone reinforce their basic knowledge in chemical engineering. Subsequently, series such as “Fundamentals of Chemical Engineering”, “Mass Transfer and Separation”, “Chemical Thermodynamics”, and “Chemical Process Technology” will also be introduced. We hope for your active participation! For replies to the “Question of the Day” activity, answers can be viewed directly; however, the thread will be closed after one day ! Participation earns 3 wealth points, with an additional 3 wealth points for correct answers. Short answer question: When a distillation column is operated under certain conditions, what changes will occur in the composition of the products at the top and bottom of the column if the feed inlet is moved up by two tray levels? Why? When the feed plate is moved upward by two plates from its appropriate position, the theoretical number of plates in the distillation section decreases; with all other conditions unchanged, the separation capacity declines, xD ↓, the yield of the volatile component decreases, and xW ↑.
Moving the feed inlet two trays upward reduces the number of theoretical trays in the distillation section, which leads to a decrease in separation efficiency, a decline in the composition of the product at the top of the tower, and an increase in the composition of the product at the bottom of the tower.
When a distillation column is operated under certain conditions, what changes will occur in the compositions of the top and bottom products if the feed inlet is moved up by two trays? Why? Answer: When the feed port is moved upward by two tray levels from the appropriate position, the number of theoretical trays in the distillation section decreases; under unchanged other conditions, the separation capacity declines and the yield of the volatile components drops.
Raising the feed inlet by two plates reduces the number of theoretical plates in the distillation section, leading to a decrease in separation efficiency; as a result, the composition of the product at the top of the tower decreases while the composition of the product at the bottom of the tower increases.
When the feed plate is moved up by two plates from its appropriate position, the theoretical number of plates in the rectification section decreases; with all other conditions remaining unchanged, the separation capacity declines, xD ↓, the yield of the volatile component decreases, and xW ↑.
When the feed plate is moved upward by two plates from its appropriate position, the theoretical number of plates in the distillation section decreases; with all other conditions unchanged, the separation capacity declines, xD ↓, the yield of the volatile component decreases, and xW ↑.
When the feed plate is moved upward by two plates from its appropriate position, the theoretical number of plates in the distillation section decreases; with all other conditions unchanged, the separation capacity declines, xD ↓, the yield of the volatile component decreases, and xW ↑.
When a distillation column is operated under certain conditions, what changes will occur in the compositions of the top and bottom products if the feed inlet is moved up by two trays? Why? Answer: When the feed plate is moved upward by two plates from its appropriate position, the theoretical number of plates in the rectification section decreases. With all other conditions remaining unchanged, the separation capacity declines, xD ↓; the yield of the volatile component decreases, while xW ↑.
When the distillation column is operated under certain conditions, the feed inlet is moved up by two trays, resulting in an increase in the high-boiling-point components at the top of the column. The low-boiling components in the product at the bottom of the tower increase
When the feed plate is moved upward by two plates from its appropriate position, the theoretical number of plates in the distillation section decreases; with all other conditions unchanged, the separation capacity declines, xD ↓, the yield of the volatile component decreases, and xW ↑.