Alstom Technology Limited

General Electric Technology Gmbh

General Electric Company

Sanjay Kumar Dube

David James Muraskin

Joseph Paul Naumovitz

Daniel Nicolaus Secundus Mattstedt

Raymond Raulfs Gansley

Frederic Zenon Kozak

Sean E Black

Stephen A Bedell

Peter Ulrich Koss

Philip C Rader

Jurgen Dopatka

Rameshwar S Hiwale

Rameshawar S Hiwale

Stephen Alan Bedell

Daniel Nicolaus Mattstedt

A system and method is disclosed for recovering reagents that are used in removing contaminants from a flue gas stream. The system and method includes contacting the flue gas stream with reagents such as ammonia and sulfuric acid to create an ammonium sulfate stream. The ammoniated sulfate stream is forwarded to an electrodialysis unit wherein the reagents are regenerated and recirculated back to the system.

Method and apparatus for reagent recovery in a flue gas processing system

A system and a method for industrial plant or utility plant flue gas desulfurization, with zero waste water liquid discharge from a wet flue gas desulfurization system utilized therein, are disclosed herein. The wet flue gas desulfurization system is supplied an absorption liquid for contact with a flue gas to absorb flue gas acid gases. Waste water from the wet flue gas desulfurization system is heated under pressure in a heat exchanger to produce heated waste water, which is supplied to a flash vessel to produce steam. The produced steam is supplied to the flue gas upstream of a particulate collection system and the wet flue gas desulfurization system, supplied to the flue gas upstream of the wet flue gas desulfurization system, or supplied to absorption liquid circulated to the wet flue gas desulfurization system.

Wet flue gas desulfurization system with zero waste water liquid discharge

A system for recovering ammonia from a gas stream is provided. The system includes a regenerator and a carbon dioxide wash station.

System and method for recovering ammonia from a gas stream

Systems and processes for reducing the energy requirements of an ammonia recovery stripper in a chilled ammonia-based COremoval system. The systems and processes include a nanofiltration or reverse osmosis unit for physically separating the washed liquid from a wash vessel configured to receive an ammonia slip feed stream from the main absorber of the chilled ammonia-based COremoval system and provide first and second feed streams. Relative to the washed liquid from the wash vessel, the first feed stream has a decreased ammonia molarity whereas the second feed stream has an increased ammonia molarity. The second feed stream is then fed to the ammonia recovery stripper, which reduces steam consumption. The reduced steam consumption translates to significant energy savings, among numerous other advantages. Additionally, the systems and process provide a reduction of equipment sizes related to the stripper unit as may be desired in some applications.

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An apparatus for evaporating waste water and reducing flue gas acid gas emissions includes an evaporator device configured to receive a portion of flue gas emitted from a combustion unit and waste water for direct contact of the flue gas with the waste water to cool and humidify the flue gas, and to evaporate the waste water. An alkaline reagent as well as activated carbon may be mixed with the waste water prior to waste water contact with the flue gas. Solid particulates that are dried and entrained within the cooled and humidified flue gas can be separated from the flue gas via a particulate collector.

Apparatus and method for evaporating waste water and reducing acid gas emissions

Disclosed herein is a system for generating a carbon dioxide gas stream that includes an absorber, a regenerator that lies downstream of the absorber, a carbon dioxide wash station that lies downstream of the regenerator and a reverse osmosis system for receiving a wash solution from the carbon dioxide wash station.

System for low pressure carbon dioxide regeneration in a chilled ammonia process

An method of operating a plant includes the steps of feeding a reagent to a direct contact heating device () for removing ammonia from fluid fed to the direct contact heating device (), feeding water to the direct contact heating device () to contact the fluid after the fluid is contacted with the reagent fed to the direct contract heating device (), and feeding the water from the direct contact heating device () to a water wash tower () that is downstream of a carbon dioxide absorber () configured to use ammonia to remove carbon dioxide from fluid fed therein. The water wash tower () can be configured to remove ammonia from the fluid fed therein prior to that fluid being fed to the direct contact heating device (). A plant and an apparatus for integrating desulfurization and carbon capture are configurable to implement the method.

Apparatus and method for integrating desulfurization and carbon dioxide capture

A carbon dioxide removal system includes a chilled ammonia carbon capture system; an absorber refrigeration system in fluid communication with the chilled ammonia system; and a heat recovery steam generator (HRSG) in fluid communication with the chilled ammonia system and the absorber refrigeration system.

Carbon dioxide removal system using absorption refrigeration

An apparatus for producing formate from carbon dioxide includes a reactor () that is configured to receive carbon dioxide from a separation device () and a first reagent to form a formate and a bicarbonate material. The bicarbonate material is sent to a regeneration device () that also receives a second reagent from a source of the second reagent to form the first reagent and a carbonate material. The first reagent is recycled back to the reactor (). The carbonate material can be stored in a storage device () for subsequent sale or other use and/or sent to a process device () of a plant for processing flue gas to remove one or more acid gas elements from the flue gas by using the carbonate material received from the regeneration device (). A method for producing formate from carbon dioxide can include use of the apparatus.

Apparatus and method for production of formate from carbon dioxide

A system and method for desulfurization or acidic gas removal from a hot flue gas is provided that uses a dry sorbent injection technology with downstream sorbent reproduction based on a dual-alkali process. As such, lime and flue gas carbon dioxide are used in a process to produce the dry sorbent, sodium bicarbonate.

Acidic gas removal using dry sorbent injection

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

Process and system for cleaning a gas stream

An ammonia recovery system and method for removing ammonia from a gas stream is provided. The system includes an ammonia recovery vessel for contacting a solution, having a dissolved acidic salt, with the gas stream, having ammonia. The dissolved acidic salt solution absorbs the ammonia in the gas stream to provide an ammonia-lean gas stream and an ammonia-rich solution. The ammonia-rich solution is heated within an ammonia stripper to release the ammonia from the ammonia-rich solution to thereby generate an ammonia-rich gas stream and the solution having dissolved acidic salt. A heat exchanger heats the dissolved acidic salt from the ammonia stripper prior to the solution being provided to the ammonia recovery system. The acidic salt has a low thermal decomposition.

System and method for recovering ammonia from a chilled ammonia process

Systems for regenerating an absorbent solution include steam produced by a boiler; a set of pressure turbines fluidly coupled to the boiler for receiving the steam, wherein the set of pressure turbines comprises a high pressure turbine, a medium pressure turbine and a low pressure turbine; and a regenerating system comprising a regenerator for regenerating a rich and/or semi-rich absorbent solution to form a lean absorbent solution in fluid communication with a reboiler, the regenerating system fluidly coupled to the set of pressure turbines, wherein steam from the low pressure turbine provides a heat source for preheating the rich or the semi-rich absorbent solution fed to the regenerator. Also disclosed are processes of use.

Low pressure steam pre-heaters for gas purification systems and processes of use

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).

Processes for operating an ammonia stripper at a low pressure in a gas purification system include providing a first side-draw stream from the ammonia stripper; heating the first side-draw stream with a second side-draw stream from a regenerator; providing a stripper offgas stream from the ammonia stripper to a stripper overhead condenser; and utilizing the stripper offgas stream as a heat source for a regenerating system fluidly coupled to the stripper overhead condenser. Also disclosed are systems for implementing the processes.

Growing community of inventors

Knoxville, TN, United States of America

Sanjay Kumar Dube