Alstom Technology Limited

General Electric Technology Gmbh

Arlyn V Petig

Frederic Zenon Kozak

David K Anderson

Michael J Rini

Mou Jian

Robert G Hilton

Marie L Aumaugher

Noel C Kuck

Keri N Cochran

James A Yann

Tom C Lillestolen

Thomas S Raines

Rameshwar S Hiwale

Ritesh Agarwal

Vikram Shabde

Frederic Z Kozak

The invention relates to a method of removing carbon dioxide from a process gas, the method comprising: a) allowing an ammoniated solution to enter an absorption arrangement, said absorption arrangement comprising at least a first absorber; b) contacting the ammoniated solution with the process gas in said first absorber, the ammoniated solution capturing at least a part of the carbon dioxide of the process gas; c) allowing the ammoniated solution to exit the absorption arrangement; d) cooling the ammoniated solution, wherein at least a part of the captured carbon dioxide is precipitated as solid salt; e) allowing the cooled ammoniated solution to enter a separator, in which separator at least a part of the precipitated solids are removed from the ammoniated solution, after which the ammoniated solution is allowed to exit the separator; f) heating the ammoniated solution; and g) allowing the heated ammoniated solution to re-enter the absorption arrangement. The invention also relates to a carbon dioxide removal system.

Method for removal of carbon dioxide from a process gas

A process and system () for removing contaminants from a solution to regenerate the solution within the system. The process includes providing a solution () from a wash vessel () to a stripping column (), the solution () including contaminants removed from a flue gas stream () present in the wash vessel () and contacting the solution with steam () inside the stripping column () thereby removing the contaminants from the solution and regenerating the solution. The stripping column () is operated at a pressure less than about 700 kilopascal.

Method and system for regenerating a solution used in a wash vessel

A power generation plant (), a method, and a COcapture system () for removing carbon dioxide () from a flue gas stream () are disclosed. As shown in FIG., a COcapture system (), comprises an absorber vessel (), a water wash vessel (), and a stripper (). The COcapture system () can be configured to introduce both a lean ionic ammonia solution () from a regeneration system () and a flue gas stream () from a cooling system () and to provide a rich ionic ammonia solution () to a regeneration system (), wherein the introduction of the lean ionic ammonia solution () to the flue gas stream () produces a flue gas substantially devoid CO(). The water wash vessel () can be configured to receive the flue gas substantially devoid CO() and produce ammoniated water () by introducing water () to the flue gas substantially devoid CO(). The stripper () can be configured to receive the ammoniated water () and to remove ammonia () from the ammoniated water () thereby producing a cleaned flue gas stream (), the stripper () being operable in at least partial vacuum conditions.

Gas stream processing

A method for removing pollutants from flue gas generated by a plant having one or more burners located at an inlet end of a vertically extending stack, the flue gas being discharged through an outlet end of the stack. The pollutants are removed by an emission treatment system which includes a major component module and inlet and outlet ductwork providing fluid communications between the stack and the major component module. The major component module includes an SCR segment, a heat exchanger segment, and an ID fan, the SCR segment having at least one catalyst unit composed of materials for selectively catalyzing at least one pollutant. The method comprises the steps of drawing the flue gas from the stack and through the major component module with the ID fan, removing the pollutant from the flue gas with the SCR segment to produce a clean flue gas, and discharging the clean flue gas to the stack with the ID fan.

Method for treating emissions

An emission treatment system for removing NOfrom flue gas includes a diversion member that closes the stack at a position intermediate the inlet and outlet ends. A major component module includes a first sub-module, having an inlet and an SCR segment, a second sub-module, having a heat exchange segment, and a third sub-module, having an ID fan and an outlet, forming a flue gas flow path extending from the inlet to the outlet. Inlet ductwork, which is in fluid communication with the stack at a position intermediate the inlet end of the stack and the diversion member, provides a passageway from the stack to the inlet. Outlet ductwork, which is in fluid communication with the stack at a position intermediate the diversion member and the outlet end of the stack, provides a passageway from the outlet to the stack. An ammonia addition subsystem injects ammonia vapor into the inlet ductwork.

Emission treatment system

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Knoxville, TN, United States of America

Arlyn V Petig