Alstom Technology Limited

General Electric Technology Gmbh

Frederic Zenon Kozak

Arlyn V Petig

David James Muraskin

Mou Jian

Sanjay Kumar Dube

David K Anderson

Michael J Rini

Peter Ulrich Koss

Robert G Hilton

Noel C Kuck

Sean E Black

Keri N Cochran

James A Yann

Tom C Lillestolen

Marie L Aumaugher

Thomas S Raines

Eli Gal

Dennis James Laslo

Otto Morten Bade

Lawrence Joseph Czarnecki

Rameshwar S Hiwale

Jurgen Dopatka

John Carl Buschmann

Vikram Shabde

Ritesh Agarwal

John Buschmann

A catalytic reactor () is provided for purposes of effecting therewith the removal of nitrogen oxides from a process gas (F) that includes at least two catalyst bed segments (), each of which is provided with a closing device (). The catalytic reactor () is operative for causing said process gas (F) to flow through a first catalyst bed segment (). Said process gas (F) is at a first temperature at which the sulphur trioxide that is entrained in said hot process gas is at least partially precipitated out on to the catalytic material that said first catalyst bed segment () embodies. Periodically said closing device () is operated in order to thereby isolate said first bed segment () from the flow therethrough of said hot process gas (F). A regeneration system () is also provided that is operative for purposes of causing a regenerating gas to flow through the first bed segment (). In addition, a sulphur trioxide removal device () is provided, which is separate from said catalytic reactor (), and which is operative for purposes of effecting therewith the removal of the sulphur trioxide from said regenerating gas.

Method and a device for removing nitrogen oxides and sulphur trioxide from a process gas

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 method for removal of CO2 from a flue gas stream, comprising the steps of: a) contacting a flue gas stream comprising CO2 with a first absorption liquid comprising NH3 such that the flue gas stream is depleted in CO2; b) contacting the flue gas stream depleted in CO2 of step a) with a second absorption liquid such that NH3 from the flue gas stream is absorbed in said second absorption liquid to form a flue gas stream depleted in CO2 and NH3; c) separating NH3 from the second absorption liquid such that a gas stream comprising NH3 is obtained; d) contacting said gas stream comprising NH3 separated in step c) with a third absorption liquid such that NH3 is absorbed in said third absorption liquid. A system for removal of CO2 from a flue gas stream, the system comprising: a CO2 absorption stage; an NH3 absorption stage; and a reabsorption stage.

Reabsorber for ammonia stripper offgas

A system for removal of carbon dioxide from a process gas includes an absorption arrangement arranged to allow contact between the process gas and an ammoniated solution within the absorption arrangement such that at least a part of the carbon dioxide of the process gas is captured by the ammoniated solution. The absorption arrangement is arranged to, with regard to the ammoniated solution, only accommodate ammoniated solution without solids. A first heat exchanger is arranged to cool the ammoniated solution including captured carbon dioxide after it has exited the absorption arrangement. A separator is arranged to remove at least a part of any solids in the cooled ammoniated solution. A second heat exchanger is arranged to heat the ammoniated solution after it has exited the separator and returned to the absorption arrangement.

System 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 method for removal of CO2 from a flue gas stream, comprising the steps of:

Disclosed is a method of removing carbon dioxide from a process gas, the method comprising: contacting an ammoniated solution with the process gas in an absorption arrangement, the ammoniated solution capturing at least a part of the carbon dioxide of the process gas, wherein the molar ratio, R, of ammonia to carbon dioxide in the ammoniated solution is controlled such that substantially no precipitation of solids occurs within the absorption arrangement; allowing ammoniated solution including captured carbon dioxide to exit the absorption arrangement; cooling the ammoniated solution that has exited the absorption arrangement, wherein at least a part of the captured carbon dioxide is precipitated as solid salt; separating at least a part of the precipitated salt from the ammoniated solution; heating the ammoniated solution from which the at least a part of the precipitated salt has been separated, such that substantially no solids are present in the heated ammoniated solution; and allowing the heated ammoniated solution to re-enter the absorption arrangement. Disclosed is also a system for removal of carbon dioxide from a process gas.

Method and system for removal of carbon dioxide from a process gas

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

An ammonia based CO2 capture system and method is provided in which multiple absorption stages are provided. Each absorption stage delivers an ionic solution at a predetermined temperature and contacts it with a flue gas stream.

Multi-stage CO2 removal system and method for processing a flue gas stream

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.

Growing community of inventors

Knoxville, TN, United States of America

Frederic Zenon Kozak