Split flow process and apparatus
AssigneeFluor Technologies Corporation
InventorsSatish Reddy, Jeffrey Scherffius, John Gilmartin, Stefano Freguia
Life of this patent
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Abstract
An acid gas removal plant includes an absorber that provides a rich solvent to two regenerators that independently generate a lean and a semi-lean solvent, wherein the semi-lean solvent is produced in one of the regenerators using heat and/or steam derived from the other regenerator. Further heat integration is particularly contemplated with power plants in which the power plant provides high-level heat to the acid gas removal plant and wherein the power plant receives low-level heat from the acid gas removal plant.
Claims20
A plant comprising:
- an absorber that removes an acid gas from a feed gas receiving a lean solvent and a semi-lean solvent, thereby producing a semi-rich solvent and a rich solvent;
- a first regenerator that receives a first portion of the rich solvent, thereby producing the lean solvent that is fed to the absorber and a first regenerator overhead;
- a second regenerator that receives a second portion of the rich solvent, thereby producing the semi-lean solvent that is fed to the absorber and a second regenerator overhead;
- wherein the second portion of the rich solvent is preheated in a heat exchanger against the lean solvent from the first regenerator;
- and
- wherein the second regenerator overhead and the semi-lean solvent that is fed to the absorber are substantially exclusively produced from the second portion of the rich solvent.
(canceled)
A plant in which an absorber removes an acid gas from a low-pressure flue gas receiving a lean solvent and a semi-lean solvent, wherein the lean solvent is produced by a first regenerator operating at a first pressure, the semi-lean solvent is produced by a second regenerator operating at a second pressure, wherein the lean solvent and the semi-lean solvent are fed to the absorber, and wherein each of the first and second pressures are greater than a pressure of the low-pressure flue gas.
Dependencies are inferred from the claim text.