Alkali Or Alkali Earth Compound Reactant Patents (Class 423/243.08)
  • Patent number: 10343110
    Abstract: Apparatus and methods for denitrification and desulfurization of and dust removal from an FCC tail gas by an ammonia-based process. The apparatus may include a first-stage waste heat recovery system, a denitrification system, a dust removal and desulfurization system, a tail gas exhaust system, and an ammonium sulfate post-processing system. The dust removal and desulfurization system may include a dedusting tower and an absorption tower disposed separately. The top and the bottom of the absorption tower may be connected respectively to the tail gas exhaust system and the ammonium sulfate post-processing system. The absorption tower may include sequentially, from bottom to top, an oxidation section, an absorption section, and a fine particulate control section. The methods may be implemented with the apparatus.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: July 9, 2019
    Assignee: Jiangnan Environmental Protection Group Inc.
    Inventors: Jing Luo, Jun Zhang, Yongying Luo, Qiang Tan, Xiangjun Xu
  • Patent number: 10213739
    Abstract: Apparatus and methods for denitrification and desulfurization of and dust removal from an FCC tail gas by an ammonia-based process. The apparatus may include a first-stage waste heat recovery system, a denitrification system, a dust removal and desulfurization system, a tail gas exhaust system, and an ammonium sulfate post-processing system. The dust removal and desulfurization system may include a dedusting tower and an absorption tower disposed separately. The top and the bottom of the absorption tower may be connected respectively to the tail gas exhaust system and the ammonium sulfate post-processing system. The absorption tower may include sequentially, from bottom to top, an oxidation section, an absorption section, and a fine particulate control section. The methods may be implemented with the apparatus.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: February 26, 2019
    Assignee: Jiangnan Environmental Protection Group Inc.
    Inventors: Jing Luo, Jun Zhang, Yongying Luo, Qiang Tan, Xiangjun Xu
  • Patent number: 10173171
    Abstract: Apparatus and methods for denitrification and desulfurization of and dust removal from an FCC tail gas by an ammonia-based process. The apparatus may include a first-stage waste heat recovery system, a denitrification system, a dust removal and desulfurization system, a tail gas exhaust system, and an ammonium sulfate post-processing system. The dust removal and desulfurization system may include a dedusting tower and an absorption tower disposed separately. The top and the bottom of the absorption tower may be connected respectively to the tail gas exhaust system and the ammonium sulfate post-processing system. The absorption tower may include sequentially, from bottom to top, an oxidation section, an absorption section, and a fine particulate control section. The methods may be implemented with the apparatus.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: January 8, 2019
    Assignee: Jiangnan Environmental Protection Group Inc.
    Inventors: Jing Luo, Jun Zhang, Yongying Luo, Qiang Tan, Xiangjun Xu
  • Patent number: 10046273
    Abstract: Systems and methods for the use of highly reactive hydrated lime (HRH) in circulating dry scrubbers (CDS) to remove sulfur dioxide (SO2) from the flue gas.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: August 14, 2018
    Assignee: Mississippi Lime Company
    Inventors: Curtis Biehn, Randy Griffard, Mark Degenova, Eric Van Rens
  • Patent number: 9956523
    Abstract: A flue gas desulfurization unit is converted from operating with lime or magnesium enhanced lime under inhibited oxidation into a unit that operates using limestone under inhibited oxidation conditions. A ball mill grinding unit may be installed to crush the limestone thereby producing a suspended slurry of fine limestone particles which is pumped to the reaction vessel. When installed, the ball mill may be installed in the process immediately downstream of the existing slaking equipment. The suspended solution may be maintained at a pH in the range of 3.0 to 6.5, optimally at approximately 5.0 to increase the dissolution rate of the limestone reagent produced by the ball mill. The post-conversion process may also require the addition of organic acids and oxidation inhibitors to achieve better SO2 removal from the flue gas.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: May 1, 2018
    Assignee: AECOM Technical Services, Inc.
    Inventors: James David Colley, Sterling Michael Gray
  • Patent number: 9956519
    Abstract: An absorbent for desulfurization of combustion gas is provided. The absorbent includes about 1 to about 16 wt % of potassium carbonate (K2CO3); about 0.1 to about 10 wt % of a promoting agent including hindered cyclic amine, hindered cyclic amine bicarbonate, or a combination thereof; and a balance amount of water. In addition, a method of treating the combustion gas using the absorbent is provided.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: May 1, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation, KOREA INSTITUTE OF ENERGY RESEARCH
    Inventors: Shin-Tae Bae, Yeoil Yoon, Sungchan Nam, Soonkwan Jeong, Sungyeoul Park, Ilsoo Chun, Youngeun Kim
  • Patent number: 9861930
    Abstract: An apparatus for evaporating waste water and reducing gas emissions includes an evaporator device configured to receiving a portion of flue gas emitted from a boiler unit and waste water to directly contact the flue gas with the waste water to cool and humidify the flue gas and to dry solid particulates within the waste water. In some embodiments, the waste water may be a component of a mixture formed by a mixer device prior to being contacted with the flue gas to humidify and cool the flue gas and dry solids within the waste water. An alkaline reagent as well as activated carbon can be mixed with the waste water prior to the waste water contacting the flue gas. Solid particulates that are dried within the cooled and humidified flue gas can be separated from the flue gas via a particulate collector.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: January 9, 2018
    Assignee: General Electric Technology GmbH
    Inventors: Raymond Raulfs Gansley, Philip C. Rader
  • Patent number: 9849420
    Abstract: A system for cleaning flue gas, the system including a particulate removal system; an additive injector positioned downstream of the particulate removal system, for injecting an additive into the flue gas; a powdered sorbent injector positioned downstream of the additive injector, for injecting powdered sorbents, wherein no powdered sorbent injectors are positioned upstream of the particulate removal system; and a flue gas desulfurization system positioned downstream from the powdered sorbent injector, wherein no other processing apparatus is located between the powdered sorbent injector and the flue gas desulfurization system.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: December 26, 2017
    Assignee: CARBONXT, INC.
    Inventors: David W. Mazyck, Heather Byrne, Regina Rodriguez, Christine O. Valcarce
  • Patent number: 9714600
    Abstract: A ship comprises: a hull; an engine for propelling the hull; a harmful substance reducing device for reducing harmful substances included in exhaust gas discharged from the engine; and a preheating device for the harmful substance reducing device, preliminarily heating the harmful substance reducing device when the hull is located at an emission control area (ECA) preliminary entry point close to an ECA in which the emission of the harmful substances is restricted. The ship comprises: the hull; the engine for propelling the hull; the harmful substance reducing device for reducing the harmful substances included in the exhaust gas discharged from the engine; and an engine output control device for controlling the output of the engine to be lowered so as to reduce the amount of the exhaust gas discharged from the engine when the hull is located in the ECA or at the ECA preliminary entry point.
    Type: Grant
    Filed: March 24, 2015
    Date of Patent: July 25, 2017
    Assignee: HYUNDAI HEAVY INDUSTRIES CO., LTD.
    Inventors: Young Woo Kwon, Ju Seog Han, Nam Gi Park, Jung Dae Yu
  • Patent number: 9504957
    Abstract: An apparatus is provided for removing sulfur oxides from a flue gas stream. That apparatus includes an absorber tower having an upper section and a lower section. A packed bed unit is provided in the upper section of the absorber tower. A first recycling circuit is provided for recycling lime water to the lower section of the absorber. Further the apparatus includes a second recycling circuit for recycling caustic solution to the packed bed unit.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: November 29, 2016
    Assignee: UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
    Inventors: Kunlei Liu, Joseph E. Remias
  • Patent number: 9381461
    Abstract: SOx removal equipment 15 which reduces sulfur oxides from flue gas 12 from a boiler 11, a cooler 16 which is provided on the downstream side of the SOx removal equipment 15 so as to reduce the sulfur oxides from the flue gas and decrease a gas temperature, CO2 recovery equipment 17 which includes an absorber for bringing CO2 in the flue gas into contact with a CO2 absorption liquid so as to be reduced and a regenerator for causing the CO2 absorption liquid to emit CO2 so as to recover CO2 and regenerate the CO2 absorption liquid, and ammonia injection equipment 22 for reducing a mist generation material which is a generation source of mist that is generated in the absorber of the CO2 recovery equipment before introducing the flue gas to the CO2 recovery equipment, are included.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: July 5, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tatsuto Nagayasu, Takashi Kamijo, Masayuki Inui, Tsuyoshi Oishi, Hiromitsu Nagayasu, Hiroshi Tanaka, Takuya Hirata, Tatsuya Tsujiuchi, Susumu Okino, Naoyuki Kamiyama, Seiji Yoshihara
  • Patent number: 9364781
    Abstract: A method and apparatus or system is provided for cleaning a flue gas and/or cooling a flue gas with a dispersed finely divided absorption liquid. As such, the absorption liquid is dispersed in a wet scrubber through which flue gas flows for absorption liquid and flue gas intermingling and contact to produce a cleaned flue gas. The absorption liquid supplied to the wet scrubber is dispersed from upwardly spraying anti-clogging nozzles and downwardly spraying nozzles arranged to maximize absorption liquid and flue gas contact with minimal spray interference between nozzles.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: June 14, 2016
    Assignee: ALSTOM Technology Ltd
    Inventors: Dennis James Laslo, Karl Hognefelt, Rikard Häkansson, Kerstin Forsgren, Fredrik Jens Brogaard
  • Patent number: 9327229
    Abstract: SOx removal equipment 15 which reduces sulfur oxides from flue gas 12 from a boiler 11, a cooler 16 which is provided on the downstream side of the SOx removal equipment 15 so as to reduce the sulfur oxides from the flue gas and decrease a gas temperature, CO2 recovery equipment 17 which includes an absorber for bringing CO2 in the flue gas into contact with a CO2 absorption liquid so as to be reduced and a regenerator for causing the CO2 absorption liquid to emit CO2 so as to recover CO2 and regenerate the CO2 absorption liquid, and ammonia injection equipment 22 for reducing a mist generation material which is a generation source of mist that is generated in the absorber of the CO2 recovery equipment before introducing the flue gas to the CO2 recovery equipment, are included.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: May 3, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tatsuto Nagayasu, Takashi Kamijo, Masayuki Inui, Tsuyoshi Oishi, Hiromitsu Nagayasu, Hiroshi Tanaka, Takuya Hirata, Tatsuya Tsujiuchi, Susumu Okino, Naoyuki Kamiyama, Seiji Yoshihara
  • Patent number: 9144764
    Abstract: Horizontal duct scrubbing systems for removing particulate matter from a gas are disclosed. The horizontal scrubbing systems may receive a particulate-containing gas stream (e.g., containing PM10 and/or PM2.5 particulate matter), and remove at least some of such particulates by spraying liquid droplets co-current to the flow of the gas stream, where the liquid droplets have a volume median droplet diameter (DV0.5) of from 240 microns to 600 microns. The scrubbing system may be substantially free of flow deflection members between a liquid inlet manifold and a demister. The system may be remove at least 50 wt. % PM10 and/or PM2.5 particulate matter from the gas stream.
    Type: Grant
    Filed: October 16, 2014
    Date of Patent: September 29, 2015
    Assignee: Alcoa Inc.
    Inventors: Rajat S. Ghosh, Neal Richard Dando, Jay N. Bruggeman
  • Patent number: 9139449
    Abstract: A method for obtaining gypsum using a flue-gas desulfurization system (FGD) having a gypsum suspension, which includes fine materials such as active carbon particles or residual carbonate particles for example, accumulates in the scrubber of a wet flue gas scrubber. The gypsum-containing suspension is thickened by at least one hydrocyclone, and the thickened gypsum suspension is discharged via the underflow of the hydrocyclone. Water is fed to the hydrocyclone in addition to the gypsum suspension via a dedicated feed line such that the content of fine material is thus reduced with respect to the suspension volume in the underflow.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: September 22, 2015
    Assignee: ANDRITZ AG
    Inventors: Michael Kramer, Andreas Gruber-Waltl
  • Patent number: 9040005
    Abstract: The present invention relates to a method for removal of SO2 from exhaust gas from a marine engine or a marine boiler of a ship. The exhaust gas from said marine engine or marine boiler is cooled and washed with seawater in a first scrubber section, and subsequently, in a second scrubber section, washed with circulating freshwater with an addition of an alkaline chemical. The circulating freshwater used for washing is warmer than the seawater used for cooling in the first scrubber section. The warmer freshwater is indirectly heat exchanged with cold seawater. The exhaust gas washed in the first scrubber section is passed via a demister unit before it is washed with circulating freshwater in the second scrubber section. The invention further relates to a corresponding scrubber system.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: May 26, 2015
    Assignee: ALFA LAVAL CORPORATE AB
    Inventor: Jens Peter Hansen
  • Publication number: 20150139881
    Abstract: A wet type flue-gas desulfurization apparatus includes a desulfurization apparatus main body; a gas introducing unit that is disposed on a side wall of the desulfurization apparatus main body and that introduces a flue gas; an absorbent accumulating unit that accumulates an absorbent which has absorbed the sulfur oxide present in the flue gas; a circulation line that circulates the absorbent from the absorbent circulating unit; a spray pipe that is disposed in the vicinity of the middle portion of the desulfurization apparatus main body and that sprays the absorbent, which is circulated in the circulation line, as a spray liquid from a nozzle; an ORP meter that measures the oxidation reduction potential of the absorbent; and an oxidation resistant pipe group that, in the vicinity of the interface of the absorbent present in the absorbent accumulating unit, cushions a falling liquid falling from an absorber of the absorbent.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 21, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Shintaro Honjo, Toshihiro Fukuda, Seiji Kagawa, Naoyuki Kamiyama, Satoru Sugita, Norikazu Inaba, Motofumi Ito, Jun Hashimoto
  • Publication number: 20150110698
    Abstract: Dry processes, apparatus, compositions and systems are provided for reducing emissions of sulfur oxides, and sulfur dioxide in particular, and/or HCl and/or Hg in a process employing a combination of a lime-based sorbent, in particular hydrated lime and/or dolomitic hydrated lime, and a sorbent doping agent administered to achieve coverage of a three-dimensional cross section of a passage carrying SOx and/or HCl and/or Hg-containing gases with a short but effective residence time at a temperature effective to provide significant sulfur dioxide and/or HCl and/or Hg reductions with high rates of reaction and sorbent utilization. The once-through, dry process can advantageously introduce the sorbent and sorbent doping agent dry or preferably as a slurry to enable uniform treatment. Preferred sorbent doping agents include water-soluble or water-dispersible copper and/or iron compositions which can be heated to an active form in situ by the flue gases being treated.
    Type: Application
    Filed: December 22, 2014
    Publication date: April 23, 2015
    Applicant: Fuel Tech, Inc.
    Inventors: Christopher R. Smyrniotis, Kent W. Schulz, Emelito P. Rivera, Ian Saratovsky, Vasudeo S. Gavaskar
  • Patent number: 8986428
    Abstract: To include a boiler 11 that burns fuel F, an air heater 13 that recovers heat of flue gas 18 from the boiler 11, a first precipitator 14 that reduces dust in the flue gas 18 after heat recovery, a desulfurizer 15 that reduces sulfur oxides in the flue gas 18 after dust reduction by an absorbent, a dewaterer 32 that reduces gypsum 31 from desulfurization discharged water 30 discharged from the desulfurizer 15, a spray drying device 34 including an atomizer that atomizes a dewatering filtration fluid 33 discharged from the dewaterer 32, and a flue-gas introducing line L11 that introduces a part of the flue gas 18 into the spray drying device 34.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: March 24, 2015
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Nobuyuki Ukai, Seiji Kagawa, Tatsuto Nagayasu, Naoyuki Kamiyama, Toshihiro Fukuda
  • Patent number: 8961916
    Abstract: This invention presents innovative methods for desulfurizing flue gas in conjunction with selective inorganics recovery using calcium chloroaluminate or calcium chloroferrate as a layered double hydroxide reagent. One of the aspects of such methods is based on scrubbing SO2 in a standalone closed loop. Further aspects of such methods are based on scrubbing SO2 by the natural alkalinity of a saline stream as a once-through sink along with controlled precipitation of magnesium hydroxide and a calcium-based mineral in a standalone basis; or in conjunction with desalination methods and/or enhanced hydrocarbons recovery.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: February 24, 2015
    Inventor: Mansour S. Bader
  • Patent number: 8916118
    Abstract: The invention relates to a CO2 y SO2 capture method comprising the following steps consisting in: a) introducing an aqueous stream of a hydroxide of an alkali or alkaline-earth metal and another gas stream of CO2 into a bubble column purifier/reactor, in order to form a carbonate of the alkali or alkaline-earth metal; b) introducing the carbonate of the alkali or alkaline-earth metal into a bubble column purifier/reactor, into which a stream of a gas mixture of CO2 and SO2 is introduced in order to form sulphite of an alkali or alkaline-earth metal and carbon dioxide; c) transforming the sulphite from step (b) into sulphate of said metal by means of oxidation with air; and d) re-circulating the unreacted CO2 produced during step (b) by reacting the slurry with the SO2, in the reactor from step (a).
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: December 23, 2014
    Assignees: Consejo Superior De Investigaciones Cientificas, Universidad De Sevilla, Universidad De Cadiz
    Inventors: Cristian Cardenas Escudero, Luis Maria Esquivias Fedriani, Victor Morales Florez, Alberto Santos Sanchez
  • Patent number: 8916120
    Abstract: Dry processes, apparatus, compositions and systems are provided for reducing emissions of sulfur oxides, and sulfur dioxide in particular, and/or HCl in a process employing a combination of a dolomite hydrate sorbent and a sorbent doping agent administered to achieve coverage of a three-dimensional cross section of a passage carrying SOx and/or HCl —containing gases with a short but effective residence time at a temperature effective to provide significant sulfur dioxide and/or HCl reductions with high rates of reaction and sorbent utilization. The once-through, dry process can advantageously introduce the sorbent and sorbent doping agent dry or preferably as a slurry to enable uniform treatment. Preferred sorbent doping agents include water-soluble or water-dispersible copper and/or iron compositions which can be heated to an active form in situ by the flue gases being treated.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: December 23, 2014
    Assignee: Fuel Tech, Inc.
    Inventors: Christopher R. Smyrniotis, Kent W. Schulz, Emelito P. Rivera, Mingming Fang, Ian Saratovsky
  • Patent number: 8883107
    Abstract: To include a boiler 11 that burns fuel F, an air heater 13 that recovers heat of flue gas 18 from the boiler 11, a first precipitator 14 that reduces dust in the flue gas 18 after heat recovery, a desulfurizer 15 that reduces sulfur oxides in the flue gas 18 after dust reduction by an absorbent, a dewaterer 32 that reduces gypsum 31 from desulfurization discharged water 30 discharged from the desulfurizer 15, a spray drying device 34 including an atomizer that atomizes a dewatering filtration fluid 33 discharged from the dewaterer 32, and a flue-gas introducing line L11 that introduces a part of the flue gas 18 into the spray drying device 34.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: November 11, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Nobuyuki Ukai, Seiji Kagawa, Tatsuto Nagayasu, Naoyuki Kamiyama, Toshihiro Fukuda
  • Publication number: 20140248201
    Abstract: The present invention relates to a method for removal of SO2 from exhaust gas from a marine engine or a marine boiler of a ship. The exhaust gas from said marine engine or marine boiler is cooled and washed with seawater in a first scrubber section, and subsequently, in a second scrubber section, washed with circulating freshwater with an addition of an alkaline chemical. The circulating freshwater used for washing is warmer than the seawater used for cooling in the first scrubber section. The warmer freshwater is indirectly heat exchanged with cold seawater. The exhaust gas washed in the first scrubber section is passed via a demister unit before it is washed with circulating freshwater in the second scrubber section. The invention further relates to a corresponding scrubber system.
    Type: Application
    Filed: September 12, 2012
    Publication date: September 4, 2014
    Applicant: ALFA LAVAL CORPORATE AB
    Inventor: Jens Peter Hansen
  • Publication number: 20140241971
    Abstract: Methods and systems for the removal of SO2 from waste combustion flue gas are described herein. The subject methods and systems entail one step, two steps or three steps to produce cleaned flue gas for release to the atmosphere.
    Type: Application
    Filed: March 22, 2013
    Publication date: August 28, 2014
    Applicant: ALSTOM Technology Ltd.
    Inventors: Daniel Per Niklas Persson, Mati Maripuu, Marja Swahn
  • Patent number: 8795416
    Abstract: An in-situ forced oxidation wet flue gas desulfurization apparatus, method and arrangement for utilization with oxy-fuel combustion power plants. The apparatus is a tower-like structure having a flue gas scrubbing zone and a reaction zone located subjacent to the gas scrubbing zone. A sulfur oxide absorbing liquid slurry is supplied to the gas scrubbing zone to react with and scrub the sulfur oxides from the flue gas. The partially reacted liquid slurry reagent and the scrubbed products drain into the reaction zone, rising to a set level. Oxidation air is introduced into the liquid slurry in the reaction zone to force the in-situ oxidation of sulfur compounds collected in the reaction zone.
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: August 5, 2014
    Assignee: Babcock & Wilcox Power Generation Group, Inc.
    Inventors: Dennis K. McDonald, Kevin J. Rogers
  • Publication number: 20140186249
    Abstract: Conventionally air filters are particulate filters composed of fibrous materials in order to remove solid particulates such as dust, pollen, mold, and bacteria from the air. Accordingly, it would be beneficial to provide absorbent filters within such systems in order to address the removal of gaseous impurity components from the circulating air in addition to conventional particulate tillers. It would be further beneficial to provide such absorbent filters in a manner which is compatible with commercial and residential environments that represent the majority of such air circulation systems. It would be further beneficial to provide such absorbent filters in formats that are compatible with new system installations as well as retrofitting to existing system installations.
    Type: Application
    Filed: November 6, 2013
    Publication date: July 3, 2014
    Inventor: Roshdy Rady Ateya Soliman
  • Patent number: 8758712
    Abstract: A wet scrubber (8) for cleaning a process gas containing sulphur dioxide comprises an absorption vessel (40) operative for bringing the process gas into contact with an absorption liquid to absorb sulphur dioxide from the process gas. The wet scrubber (8) further comprises an acidification system (90) operative for mixing absorption liquid that has absorbed sulphur dioxide from the process gas with a carbon dioxide containing gas, an absorbent dissolution tank (54) operative for adding an absorbent material to at least a portion of the absorption liquid, and a return pipe (104) operative for returning to the absorption vessel (40) at least a portion of the absorption liquid that has been mixed with the carbon dioxide containing gas.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: June 24, 2014
    Assignee: ALSTOM Technology Ltd
    Inventor: Stefan O. H. Åhman
  • Publication number: 20140170047
    Abstract: The present invention relates to a method for treating flue gas and/or condensates thereof suitable for removal of sulphur-containing compounds. The invention also relates to the purified flue gas and to a system for conducting the method according to the invention.
    Type: Application
    Filed: July 19, 2012
    Publication date: June 19, 2014
    Applicant: PURETEQ A/S
    Inventor: Dennis Søgaard
  • Patent number: 8734741
    Abstract: A method for removing contaminants from a gas stream by feeding the gas stream into a scrubber that can use seawater as the scrubbing medium. The gas stream is first scrubbed with the seawater and then mixed with ozone to remove the contaminants. Nitrogen oxides that are present in the gas stream are converted to nitric acid/nitrates and these are recovered via condensate or coalesced mist for neutralization. The treated gas stream is then exhausted to the atmosphere.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: May 27, 2014
    Assignee: Linde Aktiengesellschaft
    Inventor: Naresh J. Suchak
  • Patent number: 8715402
    Abstract: To include a boiler 11 that burns fuel F, an air heater 13 that recovers heat of flue gas 18 from the boiler 11, a first precipitator 14 that reduces dust in the flue gas 18 after heat recovery, a desulfurizer 15 that reduces sulfur oxides in the flue gas 18 after dust reduction by an absorbent, a dewaterer 32 that reduces gypsum 31 from desulfurization discharged water 30 discharged from the desulfurizer 15, a spray drying device 34 including an atomizer that atomizes a dewatering filtration fluid 33 discharged from the dewaterer 32, and a flue-gas introducing line L11 that introduces a part of the flue gas 18 into the spray drying device 34.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: May 6, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Nobuyuki Ukai, Seiji Kagawa, Tatsuto Nagayasu, Naoyuki Kamiyama, Toshihiro Fukuda
  • Patent number: 8663585
    Abstract: A system, method, and composition for generating a composition made from a combination of fly ash, FGD purge water, a fixation agent such as lime, and/or synthetic gypsum which, when mixed in the right proportions, results in a material that is easily handled and sets up over time in a relatively impermeable manner that significantly reduces the leaching of contaminants that would otherwise be readily available for release into the environment.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: March 4, 2014
    Assignee: Mississippi Lime Company
    Inventor: Thomas E. Siedhoff
  • Patent number: 8657925
    Abstract: A method of scrubbing flue gas includes introducing flue gas comprising an acidic gas through an inlet into a tower; spraying an acid-absorptive fluid into the tower such that the acid-absorptive fluid contacts the flue gas; accumulating the acid-absorptive fluid in a recycle tank portion of the tower; and introducing an oxygen-containing gas into the acid-absorptive fluid in the recycle tank portion of the tower, wherein the oxygen-containing gas is introduced through at least one opening of an aerator, each of the at least one openings are positioned to release the oxygen-containing gas at least at a distance greater than or equal to a predetermined radial distance from the flue gas inlet, the predetermined radial distance being equal to at least 10% of a diameter of the recycle tank portion of the tower.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: February 25, 2014
    Assignee: ALSTOM Technology Ltd
    Inventor: Dennis James Laslo
  • Patent number: 8628603
    Abstract: A method for treating a process gas with a liquid comprises contacting a process gas with a hygroscopic working fluid in order to remove a constituent from the process gas. A system for treating a process gas with a liquid comprises a hygroscopic working fluid comprising a component adapted to absorb or react with a constituent of a process gas, and a liquid-gas contactor for contacting the working fluid and the process gas, wherein the constituent is removed from the process gas within the liquid-gas contactor.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: January 14, 2014
    Assignee: Energy & Enviromental Research Center Foundation
    Inventors: Christopher L. Martin, Ye Zhuang
  • Patent number: 8623304
    Abstract: In accordance with the present invention, there is provide and device and method to facilitate the treatment of chlorine bypass dust while preventing increases in chemical cost and concentrations of heavy metals in clinker, and ensuring stability in quality of cement, and to treat chlorine bypass exhaust gas while avoiding coating troubles in a cement kiln etc., and preventing heat losses in a preheater etc., without degradation of clinker production amount.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: January 7, 2014
    Assignee: Taiheiyo Cement Corporation
    Inventors: Shinichiro Saito, Junichi Terasaki
  • Publication number: 20130315811
    Abstract: A ship flue gas scrubbing apparatus and scrubbing method are provided. The apparatus includes a housing, an upper scrubbing layer at the upper side inside the housing, and a liquid collecting pool in the lower side inside the housing, a flue gas leading-in port between the scrubbing layer and the liquid collecting pool, a scrubbing seawater inlet above the scrubbing layer, and a cooler located at a flue gas passage between the flue gas inlet outside the housing and the scrubbing layer. The method includes leading flue gas, cooling, injecting scrubbing seawater, scrubbing and other steps.
    Type: Application
    Filed: August 5, 2013
    Publication date: November 28, 2013
    Inventor: Sigan PENG
  • Patent number: 8568673
    Abstract: A gas analysis device according to the present invention includes a flue-gas extraction pipe for extracting flue gas from a flue gas duct to which flue gas including both of NH4Cl and SO3 is fed, a collector that is provided in the flue-gas extraction pipe, for removing soot dust contained in the extracted flue gas, a roll filter that is provided in the flue-gas extraction pipe, for depositing both of NH4Cl and SO3 contained in the flue gas, and a measurement device for measuring both of NH4Cl and SO3 contained in the flue gas by irradiating a sample including both of NH4Cl and SO3 deposited by the roll filter with X-rays and detecting fluorescent X-rays generated from the sample.
    Type: Grant
    Filed: September 22, 2011
    Date of Patent: October 29, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Seiji Kagawa, Masaru Chiyomaru, Nobuyuki Ukai, Takuya Okamoto, Moritoshi Murakami
  • Patent number: 8529858
    Abstract: A process for the energy efficient, environmentally friendly recovery of liquid and gaseous products from solid or semi-solid hydrocarbon resources, in particular, oil shale or tar sands. The process involves non-oxidative pyrolysis to recover fluid energy values, oxidative combustion to recover energy values as recoverable heat, and environmental sequestration of gases produced.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: September 10, 2013
    Assignee: JWBA, Inc.
    Inventor: Richard C. Russell
  • Publication number: 20130156673
    Abstract: An air pollution control system comprises a SOx removal equipment for reducing sulfur oxides from flue gas from a boiler, a cooler for reducing the sulfur oxides that remain in the flue gas and for decreasing a gas temperature, CO2 recovery equipment including an absorber for bringing CO2 in the flue gas into contact with a CO2 absorption liquid so as to be reduced, a regenerator for causing the CO2 absorption liquid to emit CO2 so as to recover CO2 and regenerate the CO2 absorption liquid, a heat exchanger which for decreasing a temperature of the flue gas, and calcium carbonate spraying equipment for spraying calcium carbonate between the heat exchanger and an electric dust collector, wherein a mist generation material in the flue gas is converted from a gas state to a mist state to arrest and reduce the mist generation material in the mist state using calcium carbonate.
    Type: Application
    Filed: May 31, 2011
    Publication date: June 20, 2013
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Tatsuto Nagayasu, Takashi Kamijo, Masayuki Inui, Tsuyoshi Oishi, Hiromitsu Nagayasu, Hiroshi Tanaka, Takuya Hirata, Tatsuya Tsujiuchi, Susumu Okino, Naoyuki Kamiyama, Seiji Yoshihara
  • Patent number: 8440006
    Abstract: An apparatus 100 for scrubbing flue gas 122, the apparatus 100 including a tower 140 having an inlet 120 receiving a flow of flue gas 122 and a recycle tank portion 142; a fluid 162 disposed in the recycle tank portion 142; and an aerator 150 having at least one opening 152 for introduction of an oxygen-containing gas 154 into the fluid 162, wherein the at least one opening 152 is positioned to release the oxygen-containing gas 154 at least at a distance greater than or equal to a predetermined radial distance F from the inlet 120, the predetermined radial distance F being equal to at least 10% of a diameter of the recycle tank portion 142.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: May 14, 2013
    Assignee: ALSTOM Technology Ltd
    Inventor: Dennis J. Laslo
  • Patent number: 8435471
    Abstract: A wet flue gas desulfurization process uses byproduct polyester streams such as those from the production of PLA and/or PGA consisting of hydroxy acids and other organic acids to catalyse the solubilization of calcium from limestone and to further catalyse the reaction of calcium with SO2 for desulfurization and thereby provide significant improvement in process efficiency.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: May 7, 2013
    Assignee: 2R Environmental Systems, LLC
    Inventors: Barry Hugghins, Joseph Daniel Cook
  • Publication number: 20130108535
    Abstract: A flue gas desulfurization according to the present invention includes a desulfurization absorber that removes SOx and dust contained in flue gas, spray pipes that are provided in the desulfurization absorber, an absorbent feeding means that feeds an absorbing-agent-slurry containing absorbent, in which limestone is used as an absorbing agent, into the desulfurization absorber, nozzles that are provided in the spray pipe to spray the absorbent into the desulfurization absorber, an alkaline-agent feeding means that feeds an alkaline-agent containing solution into the desulfurization absorber, and an waste-water discharge pipe for discharging filtrate obtained by solid-liquid separating the absorbent discharged from the desulfurization absorber as waste water. A feed amount of the alkaline-agent containing solution into the desulfurization absorber is adjusted based on a discharge amount of the waste water.
    Type: Application
    Filed: October 29, 2012
    Publication date: May 2, 2013
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventor: MITSUBISHI HEAVY INDUSTRIES, LTD.
  • Publication number: 20130089482
    Abstract: Methods for removing acid gases and recovering water from flue gas. A flue gas is introduced into a water spray tower and is cooled by direct contact with a sprayed aqueous stream to condense a portion of the water vapor in the flue gas. Acid gases present in the flue gas are absorbed into the aqueous mixture, and a chemical added to the stream facilitates conversion of absorbed acid gases. The aqueous stream leaving the spray tower is next treated to remove contaminants, such as carbonates and bicarbonates, thereby producing a cleaned aqueous stream that may be split into a stream that is cooled prior to reuse in the spray tower, as well as a stream that is fed back to the boiler.
    Type: Application
    Filed: October 1, 2012
    Publication date: April 11, 2013
    Applicant: PHILLIPS 66 COMPANY
    Inventors: Edward G. LATIMER, George F. SCHUETTE, Clint P. AICHELE, Mitchell E. LOESCHER, Randall L. HEALD
  • Publication number: 20130064748
    Abstract: Systems and processes for treating a flue gas for removing sulfur oxides (SOx) entrained in the flue gas generally includes contacting the gas stream with an aqueous alkali and/or alkaline earth metal hydroxide solution such as sodium hydroxide and reacting SOx entrained in the gas stream to form an aqueous alkali and/or alkaline earth metal sulfur-containing salt solution such as sodium sulfate. The aqueous alkali and/or alkaline earth metal sulfur-containing salt solution can be introduced into an electrodialysis apparatus configured to electrolyze water to form hydrogen and hydroxyl ions that selectively combine with alkali and/or alkaline earth metal ions and sulfur containing ions from the aqueous alkali and/or alkaline earth metal sulfur containing salt feedstream to form a regenerated alkali and/or alkaline earth metal hydroxide feedstream and an acid containing feedstream.
    Type: Application
    Filed: March 12, 2012
    Publication date: March 14, 2013
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventors: SANJAY K. DUBE, MICHAEL G. VARNER, DAVID J. MURASKIN
  • Publication number: 20130004400
    Abstract: 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.
    Type: Application
    Filed: February 21, 2012
    Publication date: January 3, 2013
    Applicant: ALSTOM TECHNOLOGY LTD.
    Inventors: DAVID JAMES MURASKIN, SANJAY KUMAR DUBE
  • Patent number: 8318116
    Abstract: An improved process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption is described. The process utilizes a multiphasic absorbent that absorbs an acid gas at increased rate and leads to reduced overall energy costs for the deacidizing operation.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: November 27, 2012
    Inventor: Liang Hu
  • Patent number: 8313555
    Abstract: A method and system for automated control of the operating temperature setpoint of a circulating fluidized bed (CFB) scrubber within a pre-determined range of approach temperatures to the adiabatic saturation temperature of the CFB scrubber exhaust stream to maintain an optimal operating temperature, thereby reducing low temperature sulfuric acid corrosion and deposition of wet materials, and high temperature excess reagent use. A Dewcon® Moisture Analyzer (or equivalent) is connected in the exhaust stream of the CFB scrubber. The Dewcon® Moisture Analyzer transmits adiabatic saturation temperature data of the exhaust stream to the CFB scrubber system controller. Based on pre-programmed parameters, the system controller adjusts the CFB scrubber temperature setpoint.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: November 20, 2012
    Assignee: Allied Environmental Solutions, Inc.
    Inventor: Paul E. Petty
  • Publication number: 20120275980
    Abstract: A method and apparatus for diluting a solution of an alkali metal hydroxide (MOH) by using seawater or any other aqueous solution are disclosed, in which a concentrated MOH solution and seawater contact opposite sides of a membrane adapted to transmit water but not other molecules, thus creating a diluted solution of MOH and concentrated brine. Additional embodiments include means for limiting fouling of the system by removing Ca and Mg from the seawater by precipitation or reaction with a flocculant. Means and methods for adapting the method and apparatus for use in a flue gas desulfurization system are also disclosed.
    Type: Application
    Filed: December 16, 2010
    Publication date: November 1, 2012
    Applicant: CLEAN MARINE AS
    Inventors: Riki Canari, Johan Ivar Ervik
  • Patent number: 8293200
    Abstract: A method of heating a used absorption liquid resulting from a carbon dioxide absorption stage in which a CO2 comprising 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 SO2 comprising flue gas is contacted with a reagent composition comprising an alkaline compound.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: October 23, 2012
    Assignee: ALSTOM Technology Ltd
    Inventors: Sanjay Kumar Dube, David James Muraskin
  • Patent number: 8268276
    Abstract: In a method for reducing lime consumption in DFGD systems, a slaker is provided wherein lime and water is introduced to produce a slaked lime slurry. The slurry is introduced into a spray dryer wherein the slurry is atomized. A flue gas stream is also introduced into the spray dryer and reacts with the atomized slurry, causing calcium sulfate and sulfite, as well as unreacted lime particulate to form. A portion of the particulate is filtered and sent back in a substantially dry form to the slaker to form part of the slurry.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: September 18, 2012
    Assignee: ALSTOM Technology Ltd
    Inventor: Thomas Edwin Pearson