How long does it take to start up a distillation column?
How long does it take to start up a distillation column?
According to the criterion used to determine the startup time, in the procedure PP1, the top and bottom streams of the extractive column reached the specifications in 3.45 and 12.76 hours of startup respectively, while the recovery column reached the specifications of the steady state in 22.63 hours of startup.
How does a distillation column operate?
The distillation column is made up of a series of stacked plates. A liquid feed containing the mixture of two or more liquids enters the column at one or more points. The liquid flows over the plates, and vapor bubbles up through the liquid via holes in the plates. In essence, the hot mixture is pumped into the bottom.
How do you heat a distillation column?
Many distillation columns are heated by steam reboilers. Typically the process materials are on the tube side of the exchanger with the steam being on the shell side, as shown in Fig. 19.3.
How do you size a distillation column?
A distillation column is sized by determining the diameter of the tower. An initial estimation of the tower diameter can be done based on the vapor and liquid loadings in the column.
What is reflux and reboiler?
The vapour raised in the reboiler is re-introduced into the unit at the bottom of the column. The liquid removed from the reboiler is known as the bottoms product or simply, bottoms. Some of this liquid is recycled back to the top of the column and this is called the reflux.
How do you calculate tray spacing in distillation column?
Tray spacing is the distance between two trays. Generally tray spacing ranges from 8 to 36 inches (200 mm to 900 mm). Prime factor in setting tray spacing is the economic trade-off between column height and column diameter….Jet Flood: Kister and Haas correlation.
| Sr.no. | Factors | Applicability |
|---|---|---|
| 10 | Tray Spacing | 14-36 in |
| 11 |
What is distillation operation?
distillation, process involving the conversion of a liquid into vapour that is subsequently condensed back to liquid form. This basic operation requires the use of a still or retort in which a liquid is heated, a condenser to cool the vapour, and a receiver to collect the distillate.
