Alstom Technology Limited

Alstom (schweiz) Ag

General Electric Technology Gmbh

David James Muraskin

Sanjay Kumar Dube

Frederic Zenon Kozak

Dennis James Laslo

Sean E Black

Eli Gal

Otto Morten Bade

Peter Ulrich Koss

Michael J Rini

Michael G Varner

Jurgen Dopatka

Donald C Borio

Rameshwar S Hiwale

Rameshawar S Hiwale

Michael Chiang

Mark A Walters

Phillip C Rader

Dennis J Laslo

Frederic Z Kozak

The present application relates to a system and a process for gas cleaning.

Process and system for cleaning a gas stream

A system for removing carbon dioxide from a flue gas stream is provided, the system comprising an absorber vessel configured to receive a flue gas stream, the absorber vessel comprising a first absorption stage configured to receive the flue gas stream and contact it with a first ionic solution, a second absorption stage configured to receive flue gas which has passed the first absorption stage and contact it with a second ionic solution, a first sump vessel, and a second sump vessel. Furthermore, a method for removing COfrom a flue gas stream containing COis provided, the method comprising the steps of a) contacting a flow of a first ionic solution comprising NHwith a flue gas stream to remove a first portion of COfrom the flue gas stream, b) collecting the used ionic solution from step a) in a first sump vessel, c) recycling ionic solution from the first sump vessel to step a), d) contacting a flow of a second ionic solution comprising NHwith the flue gas stream to remove a second portion of COfrom the flue gas stream, e) collecting the used ionic solution from step d) in a second sump vessel, and f) recycling ionic solution from the second sump vessel to step d).

[object Object]

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

Processes for recovering ammonia from an ammonium sulfate stream include reacting the ammonia sulfate stream with a lime slurry to form a slurry comprising calcium sulfate and ammonia; providing the slurry comprising calcium sulfate and ammonia to a stripper configured to recover the ammonia from the slurry; utilizing a heat source from a chilled ammonia process to the stripper; and extracting an ammonia vapor stream from the stripper. Also disclosed are systems for performing the processes.

A gas stream containing carbon dioxide and sulfur dioxide is cleaned by removing, in a sulfur removal stage, sulfur dioxide from the gas stream. Sulfur dioxide is removed from the gas stream by bringing the gas stream into direct contact with ammonia. The used ammonia may be recycled. In a carbon dioxide removal stage, carbon dioxide is removed from the gas stream depleted in sulfur dioxide by bringing the gas stream into contact with an ammoniated liquid. Following sulfur dioxide and carbon dioxide removal, in an ammonia removal stage, ammonia from the gas stream is removed. Ammonia is removed from the gas stream by bringing the gas stream into direct contact with an acidic liquid to absorb into the acidic liquid, ammonia from the gas stream. The used acidic liquid may be recycled.

Gas treatment process and system

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 method of heating a used absorption liquid resulting from a carbon dioxide absorption stage in which a COcomprising gas stream is contacted with an absorption liquid comprising ammonia, wherein the used absorption liquid is subjected to heat exchange, in a heat exchanger, with a fluid of a desulfurization stage in which a SOcomprising flue gas is contacted with a reagent composition comprising an alkaline compound.

Desulfurization of, and removal of carbon dioxide from, gas mixtures

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 system for separating sulfur dioxide from a gas using an aqueous absorption liquid. The system includes a housing, an apertured plate, an outlet box, a distribution mechanism, a container, and a pump. The housing has an inlet and an outlet. The apertured plate is positioned between the inlet and the outlet and includes a lower side, an upper side, and apertures fluidly connecting the lower and upper sides. The outlet box includes a distribution mechanism that is arranged so that the absorption liquid draining from the outlet box contacts the gas from the inlet before the gas passes through the apertures in the apertured plate. The container contains the absorption liquid and is fluidly connected with the housing. The pump draws the absorption liquid from the container through the pump and through a conduit to the upper side of the apertured plate.

Method and device for separation of sulphur dioxide from a gas

A flue gas mixture containing sulfur oxides is scrubbed in a countercurrent spray tower absorber with a spray of ammonium sulfate liquor and the scrubbed gas stream containing ammonia aerosols, sulfur trioxide aerosols and ammonia slip is passed to a wet electrostatic precipitator for the removal of the aerosols and slip. The ammonium sulfate liquor in the absorber system is passed into a separate reaction tank where ammonia and air are injected. The ammonia and sulfur oxides react in the separate reaction tank to form ammonium sulfite which is oxidized to the sulfate by the air. The gases and vapors from the separate reaction tank are separately scrubbed and the gases then returned to the absorber.

Growing community of inventors

Knoxville, TN, United States of America

David James Muraskin