The sensitivity plate temperature of the MTBE distillation column is low, but the C4 fraction after the mixer has a value of 1.1, while the C5 feed fraction has a value of 2.77. The pressure in the distillation column is also high; please provide an explanation, teachers
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The sensitivity plate temperature of the MTBE distillation column is low, but the C4 band after the mixer has a value of 1.1, while the C5 feed band has a value of 2.77. The pressure in the distillation column is also high
With a feed rate of 2.77 for C5, can your MTBE still meet the specifications? Under normal circumstances, your C5 should be extracted along with MTBE at the bottom of the distillation tower; it shouldn’t reach such large quantities at the top of the tower. Adjust the temperature at the bottom of the tower accordingly and increase the reflux ratio. High tower pressure is usually due to light components; check whether the levels of C3 or C2 in the feed are high, and a stripping column can be used to remove them.
Is the load high? If it is overloaded, the product quality at the top and bottom of the tower may be impure, and the tower pressure will also be high
It’s likely that the distillation column cooler is overloaded and unable to provide sufficient cooling, which results in high pressure in the distillation column; as a result, the reflux stream contains C5
Raw material carbon 5 affects the purity at the bottom of the tower; if the distillation tower is overloaded, it becomes difficult to cool the top of the tower, resulting in higher pressure. If it is not overloaded, some reflux should be added.