Solvent scavenger for a desolventizer toaster using a vapor recovery system
AssigneeCrown Iron Works Company
InventorsGeorge E. Anderson, Benjamin W. Floan
Life of this patent
Estimating the term…
Abstract
An improved desolventizer-toaster (DT) unit is used for removing traces of a hydrocarbon solvent from a mass of vegetable particles of oil. A conventional DT unit has within a housing, a set of solvent removal trays and a main ejector transporting solvent vapor and steam from below the tray set to between a pair of the trays in the set. The improved DT unit has a further scavenger tray between an inlet of the main ejector and the housing floor. A scavenger ejector transports solvent vapor from between the scavenger tray and the housing floor before it exits from the unit, to the space between the tray set and the scavenger tray.
Claims7
In a desolventizer-toaster (DT) unit for removing liquid solvent from a mass of vegetable meal, said DT unit of the type having a floor and above the floor, a series of permeable intermediate trays and a bottom tray, each said intermediate tray receiving steam for heating the meal and permeating the meal, and through which cascade downward through ports therein the meal to a bottom tray, and through which upwards flows a mixture of the steam and vaporized solvent, said bottom tray and the floor of the unit each having a transport device for passing meal to the space below but resisting passage of vapors, said DT unit further comprising a main ejector with an inlet in the space below the bottom tray and an outlet between adjacent trays above the bottom tray, wherein the invention comprises:
- a) a scavenger tray between the main ejector inlet and the floor;
- b) a first scavenger ejector having an inlet in the space between the scavenger tray and the floor and an outlet in the space between the scavenger tray and the bottom tray.
Dependencies are inferred from the claim text.