Method for increasing gas oil yield and energy efficiency in crude oil distillation
First Claim
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1. A method for increasing gas oil yield and energy efficiency in crude oil distillation, the method comprising the steps of:
- a. separating a lighter fraction vapor and a liquid fraction from a desalted crude oil by passing the desalted crude oil through one or more flash drums;
b. superheating the lighter fraction vapor by passing the lighter fraction vapor through a first furnace to obtain a superheated lighter fraction;
c. injecting the superheated lighter fraction vapor into a distillation column having a plurality of trays, the superheated lighter fraction vapor injected either at a bottom of the distillation column or at a stripping section located between a flash zone and the bottom of the distillation column;
d. heating the liquid fraction in a second furnace to obtain a heated liquid fraction and feeding the heated liquid fraction to the flash zone of the distillation column; and
e. distilling the superheated lighter fraction and the liquid fraction and passing the distillates to side strippers from different trays of the plurality of trays of the distillation column, to obtain lighter products and residue.
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Abstract
A method for significant increase in gas oil yield and energy efficiency in crude oil distillation is provided. The present invention relates to a method of separating the components of crude oil. This method utilizes the innovative and novel application of lighter fraction of crude through its superheating and its injection in the stripping section consisting of bottom to flash zone of main distillation column. Method also illustrates the innovative utilization of water in crude distillation unit to eliminate the bottom striping steam and for significant energy saving.
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10 Claims
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1. A method for increasing gas oil yield and energy efficiency in crude oil distillation, the method comprising the steps of:
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a. separating a lighter fraction vapor and a liquid fraction from a desalted crude oil by passing the desalted crude oil through one or more flash drums; b. superheating the lighter fraction vapor by passing the lighter fraction vapor through a first furnace to obtain a superheated lighter fraction; c. injecting the superheated lighter fraction vapor into a distillation column having a plurality of trays, the superheated lighter fraction vapor injected either at a bottom of the distillation column or at a stripping section located between a flash zone and the bottom of the distillation column; d. heating the liquid fraction in a second furnace to obtain a heated liquid fraction and feeding the heated liquid fraction to the flash zone of the distillation column; and e. distilling the superheated lighter fraction and the liquid fraction and passing the distillates to side strippers from different trays of the plurality of trays of the distillation column, to obtain lighter products and residue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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