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US 7,377,967 B2Granted
Split flow process and apparatus
AssigneeFluor Technologies Corporation
InventorsSatish Reddy, Jeffrey Scherffius, John Gilmartin, Stefano Freguia
Life of this patent
Estimating the term…
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.
Claims19
A plant comprising:
- an absorber that is configured to remove an acid gas from a feed gas, wherein the absorber is further configured to receive a lean solvent and a semi-lean solvent and to produce a semi-rich solvent and a rich solvent;
- a first regenerator fluidly coupled to the absorber and configured to receive a first portion of the rich solvent and further configured to produce the lean solvent and a first regenerator overhead;
- a second regenerator fluidly coupled to the absorber and configured to receive a second portion of the rich solvent and further configured to produce the semi-lean solvent and a second regenerator overhead;
- a heat exchanger operationally coupled to the absorber and configured to preheat the second portion of the rich solvent against the lean solvent from the first regenerator;
- and
- wherein the first and second regenerators are configured such that 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.
3 more elements
A plant comprising:
- an absorber that is configured to remove an acid gas from a low-pressure flue gas and further configured to receive a lean solvent and a semi-lean solvent,
- a first regenerator configured to operate at a first pressure and to produce the lean solvent,
- a second regenerator configured to operate at a second pressure and to produce the semi-lean solvent
- wherein the absorber is further configured such that the lean solvent and the semi-lean solvent are fed to the absorber, and such that each of the first and second pressures are greater than a pressure of the low-pressure flue gas.
1 more element
Dependencies are inferred from the claim text.