Regarding distillation column operation
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This post was last edited by theclassic on 2017-8-21 at 22:38. Distillation column, pressurized column; full condensation with no venting; no control valve on the gas outlet; the water flow in the condenser is set at full capacity with no room for adjustment; forced reflux. If the top pressure of the tower increases, how can it be reduced? Does the backflow increase or decrease?
Distillation tower, pressurized tower; full condensation with no venting; no control valve on the outlet gas; the water flow in the condenser is set at full capacity, with no room for adjustment. At this point, the pressure at the top of the tower increases, so either the load must be reduced or the amount of steam used for heating at the bottom of the tower must be decreased.
Reduce the vapor volume at the tower bottom or adjust the feed rate
Reduce evaporation or lower operational load
Check the properties of the raw materials and the pressurized gas pipelines; reduce the feed volume and steam volume to lower the bottom temperature of the tower.
Reduce the temperature at the bottom of the tower, increase the reflux appropriately, and use the reflux pressure to control the temperature at the top of the tower
If the premise is to maintain constant feed rate and bottom temperature, then the reflux rate can only be reduced, with the top distillate volume increasing proportionally. Doing this may result in the tower top distillate being substandard.
Increasing the reflux rate can only temporarily lower the temperature at the bottom of the tower; to maintain this temperature, increasing the reflux rate will only increase the load on the tower, cause the cooler to be overloaded, and raise the tower pressure
Reduce the backflow-induced pressure drop in the column. While reducing the heat at the bottom of the tower