A new operation policy--quasi-batch distillation for recovering infinitesimal amounts species existing in a mixture is presented. In quasi-batch distillation operation, feed is introduced with a constant flow rate ont...A new operation policy--quasi-batch distillation for recovering infinitesimal amounts species existing in a mixture is presented. In quasi-batch distillation operation, feed is introduced with a constant flow rate onto the feed stage of the column, and the flow rate of the distillate is the same as that of the feed, whereas the bottom product is withdrawn periodically. The behavior of quasi-batch distillation is simulated and analyzed through an example on heavy water separation. Comparing with continuous or batch distillation, the new operation policy is more reliable and efficient to achieve higher recovery of dilute component. This is especially suitable for separating small amount of precious species from large amount of raw material.展开更多
A quasi-steady-state model for batch extractive distillation was provided.This shortcut model can be used to simulate the temperature of all trays in batch extractive distillation, the composition concentration of the...A quasi-steady-state model for batch extractive distillation was provided.This shortcut model can be used to simulate the temperature of all trays in batch extractive distillation, the composition concentration of the still and the top of the distillation column.The experimental results were in good agreement with those from the model.The results proved that the model had such advantages as high precision and fast calculation.展开更多
基金Supported by the National Natural Science Foundation of China (No. 20136010).
文摘A new operation policy--quasi-batch distillation for recovering infinitesimal amounts species existing in a mixture is presented. In quasi-batch distillation operation, feed is introduced with a constant flow rate onto the feed stage of the column, and the flow rate of the distillate is the same as that of the feed, whereas the bottom product is withdrawn periodically. The behavior of quasi-batch distillation is simulated and analyzed through an example on heavy water separation. Comparing with continuous or batch distillation, the new operation policy is more reliable and efficient to achieve higher recovery of dilute component. This is especially suitable for separating small amount of precious species from large amount of raw material.
文摘A quasi-steady-state model for batch extractive distillation was provided.This shortcut model can be used to simulate the temperature of all trays in batch extractive distillation, the composition concentration of the still and the top of the distillation column.The experimental results were in good agreement with those from the model.The results proved that the model had such advantages as high precision and fast calculation.
