2) As already stated the tray efficiency is not 100%. In an actual column, if it has been optimized, the feed location will be at a location where the ffed compostion is equal to the tray composition.. The tray efficiency has no reason to be constant all over the column. It varies with physical propoertise, liquid and vapor rates..

feed points to choose from, especially when the raw materials of varying composition and varying components are to be used. The feed to be separated may enter at any point in the column, although the optimal feed tray location should be determined and used (Wankat, , ). While more than one stream may be fed to the system, and more

The effects of feed locations on the design of reactive distillation systems are explored in this chapter. Ideal reactive distillation systems are used to illustrate the advantage of feed tray optimization in design and control.

By choosing the optimum feed tray location for the columns, about 16% of energy consumption could be reduced. Key words: Distillation, Process Control, 

Yes we can say sieve tray is mostly used tray in distillation column because of following reason. 1. Larger capacity 2. Low cost 3. Lower maintenance cost 4. Easy installation But now a days market demand is changing day by day just because of competition in market so you have to change your production based on the demand of market. Ravi Kasundra

Feed tray location Particularly when the number of trays is small, the location of the feed tray has a marked effect on the separation in the column. An estimate of the optimum location can be made with the Under-wood-Fenske equation (13.116), by applying it twice, between the overhead and the feed and between the feed and the bottoms.The ratio of the numbers of rectifying Nr

It also affects the location of feed tray. During operation, if the deviations from design specifications are excessive, then the column may no longer be able 

The Scott distillation column consists of six sieve trays, each of which includes two semi-cylindrical conduits (downcomers) for liquid to flow from the tray 

01/09/2005 · The impact of altering feed tray locations (for the purpose of saving energy) on the controllability of double feed reactive distillation (RD) columns is evaluated for two case

Additionally you still need to use the Gilliland and subsequently the Kirkbride method to determine the feed tray location. Just briefly, 1. Fenske method estimates the minimum number of stages (at total reflux). 2. Underwood method estimates minimum reflux ratio. 3. Gilliland method estimates the number of theoretical stages required. 4.

to-feed strategy by controlling the reflux-drum level with reboiler heat input and manipulating the small distillate flow rate to control a tray temperature