Sulfur Or Sulfur Containing Component Patents (Class 423/242.1)
  • Patent number: 10603631
    Abstract: A desulfurization apparatus employing the limestone-gypsum method has: a desulfurization unit where an absorbing liquid containing a calcium compound contacts with an exhaust gas to remove a sulfur oxide from the exhaust gas; a removal unit for removing gypsum, generated from the sulfur oxide, from the absorbing liquid; and a cleaning unit for cleaning the exhaust gas after contacting, using a cleaning liquid, thereby removing calcium-containing particles from the exhaust gas. In the removal unit, the gypsum is separated into larger gypsum particles and smaller gypsum particles using a cyclone separator, and the absorbing liquid containing the larger gypsum particles is filtrated and the filtrate is supplied to the cleaning unit as the cleaning liquid. An exhaust gas processing system has the desulfurization apparatus, a denitration apparatus and a carbon dioxide recovery apparatus. A post-recovery gas is partially supplied to the desulfurization apparatus as an oxygen source.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: March 31, 2020
    Assignee: IHI Corporation
    Inventor: Toshiyuki Naito
  • Patent number: 10391443
    Abstract: A process for the stepwise separation of accompanying gases from a raw synthesis gas stream by a liquid absorbent countercurrently guided through all process steps and circulated via regeneration plants, wherein either the accompanying gases H2S, COS and CO2 are separated in a common absorption step or, in one of the selective absorption steps chiefly H2S and COS are separated and in the next step in flow direction of the gas chiefly CO2 is separated, and in the last step a separation of accompanying gas residues (fine wash) is effected, wherein before the separation of H2S and COS an absorption step chiefly for the separation of aromatics and subsequently an absorption step chiefly for the separation of methyl mercaptan is carried out.
    Type: Grant
    Filed: November 26, 2015
    Date of Patent: August 27, 2019
    Assignee: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
    Inventor: Manfred Meyer
  • Patent number: 9278859
    Abstract: This invention relates to the recovery of energy in the manufacture of sulfuric acid, and more particularly to enhanced recovery of energy from the absorption of wet SO3 in sulfuric acid. The invention is further directed to control of mist formation during SO3 absorption, and of the sulfuric acid mist content of the gas stream leaving the SO3 absorption step in a process wherein SO3 absorption energy is recovered from absorption acid in useful form.
    Type: Grant
    Filed: October 22, 2014
    Date of Patent: March 8, 2016
    Assignee: MECS INC
    Inventor: Ernesto Vera-Castaneda
  • 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
  • Patent number: 9034527
    Abstract: One embodiment of the present invention is a unique fuel cell system. Another embodiment is a unique desulfurization system. Yet another embodiment is a method of operating a fuel cell system. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for fuel cell systems and desulfurization systems. Further embodiments, forms, features, aspects, benefits, and advantages of the present application will become apparent from the description and figures provided herewith.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: May 19, 2015
    Assignee: LG Fuel Cell Systems Inc.
    Inventor: John R. Budge
  • Patent number: 9011808
    Abstract: A process for removing impurities, in particular oxides of sulphur (SOx) and/or oxides of nitrogen (NOx) from oxygen-containing gas streams by scrubbing with at least one washing agent is described. In order to achieve effective gas purification in an economical manner even in the case of so-called large “oxyfuel” furnaces which operate with oxygen as fuel gas, it is proposed to convert the impurities at an elevated pressure of at least 2 bar with at least one basic constituent of the washing agent into salts and to wash out said impurities as dissolved salts.
    Type: Grant
    Filed: November 26, 2009
    Date of Patent: April 21, 2015
    Assignee: Linde AG
    Inventors: Nicole Schodel, Hans Jorg Zander, Florian Winkler, Roland Ritter, Torsten Stoffregen
  • Publication number: 20150104365
    Abstract: A flue-gas purification system includes a flue-gas cycling system, a reacting means, and an absorbent adding system having at least a catalytic absorbent, wherein the catalytic absorbent is being gasified for reacting with the flue-gas in the reacting means in a homogenous gas-gas phase reacting manner. Therefore, the purification system has fast reaction rate between the pollutants of the flue-gas and the catalytic absorbent, which is preferably ammonia, to efficiently remove pollutants, so as to effectively purify the flue-gas.
    Type: Application
    Filed: September 16, 2014
    Publication date: April 16, 2015
    Inventors: Baoquan Zhang, Xiaoqing Zhang
  • Patent number: 8992868
    Abstract: Dry processes, apparatus, compositions and systems are provided for reducing emissions of mercury and optionally sulfur oxides and/or HCl. In an embodiment the copper-based mercury remediation composition comprises a copper ammonium complex having an empirical formula of C2H7CuNO2 or any of the other materials described, which include compositions defined by the formula Cu(NH3)x(lower carboxylate)y, wherein the lower carboxylate is selected from the group consisting of formate, acetate and propionate, x is an integer from 0 to 4, y is an integer from 0 to 2, and x+y is equal to or greater than 1. Sulfur oxides and/or HCl can be additionally reduced by introduction of dolomite hydrate sorbent, and additional mercury remediation chemicals as manganese oxides can be employed. The treated gas stream is treated with a particulate removal device.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: March 31, 2015
    Assignee: Fuel Tech, Inc.
    Inventors: Christopher R. Smyrniotis, Kent W. Schulz, Emelito P. Rivera, Mingming Fang, Ian Saratovsky
  • Patent number: 8980212
    Abstract: A system includes a selective catalytic reactor and a bypass line. The selective catalytic reactor is located downstream of a furnace that generates flue gases. The selective catalytic reactor reduces nitrogen oxides to nitrogen. The bypass line is in fluid communication with the selective catalytic reactor. The bypass line contacts an input line to the selective catalytic reactor, where the bypass line is adapted to handle a volume of flue gases diverted from the selective catalytic reactor. A first control damper is disposed at an inlet to the selective catalytic reactor; and a second control damper is disposed at an inlet to the bypass line. The first control damper and the second control damper interact to divide the flue gas stream between the selective catalytic reactor and the bypass line in a ratio to reduce the amount of sulfur trioxide released from the system to a desirable value.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: March 17, 2015
    Assignee: ALSTOM Technology Ltd
    Inventors: Scott L. Darling, Mitchell B. Cohen, Todd D. Hellewell
  • Patent number: 8980210
    Abstract: A system and method for acid-gas capture wherein organic acid-gas capture materials form hetero-atom analogs of alkyl-carbonate when contacted with an acid gas. These organic-acid gas capture materials include combinations of a weak acid and a base, or zwitterionic liquids. This invention allows for reversible acid-gas binding to these organic binding materials thus allowing for the capture and release of one or more acid gases. These acid-gas binding organic compounds can be regenerated to release the captured acid gasses and enable these organic acid-gas binding materials to be reused. This enables transport of the liquid capture compounds and the release of the acid gases from the organic liquid with significant energy savings compared to current aqueous systems.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: March 17, 2015
    Assignee: Battelle Memorial Institute
    Inventors: David J. Heldebrant, Clement R. Yonker, Phillip K. Koech
  • Patent number: 8968691
    Abstract: An object of the present invention is to provide a treatment method and a plant of an exhaust gas in which corrosion resistance of the exhaust gas treatment plant to a sulfuric acid mist after wet type desulfurization is increased. The treatment method of an exhaust gas in the present invention, wherein sulfur oxide is removed by wet type desulfurization of the exhaust gas and a sulfuric acid mist is removed by feeding ammonia into the exhaust gas, is characterized in that an ammonia gas is mixed into the exhaust gas by feeding inorganic ammonium salt to an alkali desulfurizing agent when the desulfurizing agent is sprayed into the exhaust gas to absorb and remove the sulfur oxide in the exhaust gas.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: March 3, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihiko Mochizuki, Naoyuki Ohashi
  • 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: 8951489
    Abstract: A flue gas treatment process and system is presented. The system includes a fan capable of moving a flue gas through a flue gas desulfurizer, direct contact cooler, and CO2 absorber, without the need for a booster fan. The system also includes a direct contact cooler and CO2 absorber that are configured to withstand gas conditions present at the flue gas desulfurizer exit. When the direct contact cooler and CO2 absorber are shutdown, the speed of the fan is lowered and the flue gas continues to flow through the cooler and CO2 absorber and out a chimney. The overall cost of installing, operating, and maintaining the system is lower than that of conventional processes and systems.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: February 10, 2015
    Assignee: Fluor Technologies Corporation
    Inventors: Jonathan Priest, Bill Richardson, Dennis W. Johnson
  • Patent number: 8932547
    Abstract: The invention relates to a so-called zero emission ‘AST-CNR/ITM system’ modular plant for removal of pollutants from flue gases produced by industrial processes. The plant comprises prefabricated modular elements with programmed and automatic operation, easy to mount and assemble on site without undergoing expensive plant stoppage. Each module or ‘reaction tower’ comprises a plurality of sections vertically arranged on top of one another, which carry out the following functions: Removal of particulate matter with treatment and removal of chemical pollutants, such as heavy metals, chlorides, fluorides Treatment and removal of SOx Treatment and removal of NOx Capture of CO2 Production of hydrogen Production of methanol. The various sections may be combined according to the requirements of the plant and of the flue gases to be treated.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: January 13, 2015
    Assignee: AST Engineering S.R.L.
    Inventors: Tommaso Nardo, Antonio Maria Nardo, Angelo Basile, Fausto Gallucci
  • Publication number: 20150000244
    Abstract: A system for reducing emissions includes a gas production source that produces nitrogen oxides, sulfur oxides, hydrogen sulfide, sulfuric acid, nitric acid, formaldehyde, benzene, metal oxides, or volatile organic compound emissions. An exhaust plenum is downstream from the gas production source, and structure for dispersing a solvent is in the exhaust plenum. A collection tank is in fluid communication with the exhaust plenum to receive the solvent from the exhaust plenum, and a heat source is in the exhaust plenum downstream from the structure for dispersing the solvent. A method for reducing emissions from a gas production source includes flowing exhaust gases through an exhaust plenum, dispersing a solvent through a nozzle in the exhaust plenum, collecting the dispersed solvent in a collection tank, and heating the exhaust gases flowing through the exhaust plenum downstream from the nozzle.
    Type: Application
    Filed: July 1, 2013
    Publication date: January 1, 2015
    Inventors: Robert Thomas Thatcher, Gilbert Otto Kraemer, Andrew Mitchell Rodwell, Brett Matthew Thompson
  • Patent number: 8920158
    Abstract: Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components: reduce emissions of elemental and oxidized mercury; increase the level of Hg, As, Pb, and/or CI in the coal ash; decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and make a highly cementitious ash product.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: December 30, 2014
    Assignee: NOx II, Ltd.
    Inventor: Douglas C. Comrie
  • Publication number: 20140363360
    Abstract: A method of removing gaseous organic sulfide contaminants from gaseous mixtures is provided where the method includes dissolving the organic sulfide contaminants in a solution of an acid-based catalyst to permit cleavage of the sulfur atom from the organic sulfide molecule, such that the cleaved sulfur atom can be further reduced electrochemically to elemental sulfur or alkali metal polysulfides.
    Type: Application
    Filed: August 25, 2014
    Publication date: December 11, 2014
    Inventor: Subramanian Iyer
  • Patent number: 8906133
    Abstract: A process for cooling an acid that is withdrawn from an absorption apparatus of a sulfuric acid plant includes pumping the acid to be cooled from an acid pump tank and supplying the acid to a shell space of a heat exchanger. Water is supplied as a heat transport medium to heat transfer elements disposed in the shell space so as to at least partially convert, by heat transfer from the acid, the water to steam. The acid which was cooled in the heat exchanger is supplied back to the absorption apparatus. The water is separated from the steam in a steam drum. The separated water is recirculated to the heat exchanger using a pump.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: December 9, 2014
    Assignee: Outotec Oyj
    Inventors: Karl-Heinz Daum, Wolfram Schalk
  • Patent number: 8899011
    Abstract: Methods of one or more embodiments include delivering hydrogen sulphide-containing exhaust gases to a current generation device where the gases are burnt, preferably with air being supplied. The energy released during combustion is employed at least partially for current generation. One or more embodiments also include an apparatus for current generation in which supplied hydrogen sulphide-containing exhaust gases are burnt, preferably with air being supplied.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: December 2, 2014
    Assignee: Knauf Gips KG
    Inventor: Rolf Hueller
  • Patent number: 8894955
    Abstract: The present invention provides a process for removing mercaptans from a gas stream. In the process, a first mercaptan-comprising gas stream comprising at least a mercaptan of the general formula: R1—SH, wherein R1 is an alkyl group comprising 1 to 4 carbon atoms, and an acid component is contacted with an absorption medium to obtain a mercaptan-depleted gas stream. The absorption medium includes a substituted disulphide and a base. The substituted disulphide is of the general formula R2—SS—R3, wherein R2 and R3 are carbon comprising substituents of which the corresponding R2—SH and R3—SH thiols have a vapor pressure below the vapor pressure of any R1—SH thiol, and at least one of R2 and R3 is an electron withdrawing group.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: November 25, 2014
    Assignee: Shell Oil Cpmpany
    Inventors: Jozef Jacobus Titus Smits, Sipke Hidde Wadman
  • Patent number: 8894954
    Abstract: The present invention provides a process for removing mercaptans from a gas stream gas stream, comprising the steps: a) providing a first mercaptan-comprising gas stream comprising at least a mercaptan of the general formula: R1—SH, wherein R1 is an alkyl group comprising 1 to 4 carbon atoms; and b) contacting the mercaptan-comprising gas stream with an absorption medium comprising a substituted disulphide and a nitrogen-containing base to obtain a second mercaptan-depleted gas stream, wherein: the substituted disulphide is of the general formula R2—SS—R3 wherein: R2 and R3 are carbon comprising substituents of which the corresponding R2—SH and R3—SH thiols have a vapor pressure below the vapor pressure of any R1—SH thiol.
    Type: Grant
    Filed: November 30, 2011
    Date of Patent: November 25, 2014
    Assignee: Shell Oil Company
    Inventors: Jozef Jacobus Titus Smits, Sipke Hidde Wadman
  • Patent number: 8889089
    Abstract: A process for a reduction in the amount of sulphur compounds, hydrogen cyanide, formic acid and formic acid derivatives in synthesis gas comprising these compounds, the process comprising contacting the synthesis gas with a sulphur absorbent comprising material and thereafter with a catalyst comprising one or more metals selected from the group consisting of silver, gold, copper, palladium, platinum and their mixtures and supported on a carrier comprising at least one of the oxides of scandium, yttrium, lanthanum, cerium, titanium, zirconium, aluminum, zinc, chromium and molybdenum.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: November 18, 2014
    Assignee: Haldor Topsoe A/S
    Inventors: Kim Aasberg-Petersen, Ib Dybkjaer, Poul Erik Højlund Nielsen
  • Patent number: 8883106
    Abstract: A catalytic reactor (16) 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 (48, 50, 52), each of which is provided with a closing device (60, 62, 64). The catalytic reactor (16) is operative for causing said process gas (F) to flow through a first catalyst bed segment (48). 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 (48) embodies. Periodically said closing device (60) is operated in order to thereby isolate said first bed segment (48) from the flow therethrough of said hot process gas (F). A regeneration system (34, 36, 38) is also provided that is operative for purposes of causing a regenerating gas to flow through the first bed segment (48).
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: November 11, 2014
    Assignee: ALSTOM Technology Ltd
    Inventors: John Buschmann, Lawrence Joseph Czarnecki, Mou Jian, Frederic Zenon Kozak
  • Patent number: 8883105
    Abstract: Methods related generally to the removal of atmospheric pollutants from the gas phase, are provided, as well as related apparatus, processes and uses thereof. A single-stage air scrubbing apparatus is provided that includes at least one reaction vessel, at least one introduction duct, and a turbulence component, wherein a residence time is sufficient to allow the conversion of at least one atmospheric pollution compound to at least one other compound, molecule or atom. In some embodiments, the at least one atmospheric pollution compound comprises nitrogen oxide, sulfur oxide or a combination thereof. Additionally, methods of removing atmospheric pollution compounds from a waste gas stream are disclosed that include introducing a waste gas stream and at least one additional gas stream, mist stream, liquid stream or combination thereof into a single-stage air scrubbing apparatus at a flow rate sufficient to allow for conversion of the at least one atmospheric pollution compound.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: November 11, 2014
    Inventors: Roger Glenn Miller, Larry Kent Barnthouse
  • Patent number: 8877152
    Abstract: Methods and systems for the removal of SO2 from waste combustion flue gas are described herein. One such system for removing SO2 from waste combustion flue gas containing SO2 uses a semi-dry desulfurization system for contacting the flue gas with a solvent moistened absorption material. Thereafter, a recirculated water quench is used for contacting the flue gas with recirculated water at a relatively low pH, followed by a condenser used for contacting the flue gas with a water spray. Additionally, a NaOH supply for supplying NaOH to the condenser and an oxidizing catalyst supply for supplying an oxidizing catalyst to the condenser, are likewise used to produce cleaned flue gas for release to the atmosphere.
    Type: Grant
    Filed: March 22, 2013
    Date of Patent: November 4, 2014
    Assignee: ALSTOM Technology Ltd
    Inventors: Daniel Per Niklas Persson, Mati Maripuu, Marja Swahn
  • Publication number: 20140322117
    Abstract: A method for detecting paths and amount of loss of desulfurization organic components in a flue gas desulfurization system includes preparing a to-be-measured solution and a base standard solution, and diluting the base standard solution with water to a plurality of standard solutions containing different concentrations of desulfurization organic components; adjusting the to-be-measured solution and standard solutions to have a strong acidity, respectively, such that each of desulfurization organic components in the to-be-measured solution and standard solutions exists in ion forms; heating and oscillating the to-be-measured solution and standard solutions, respectively; respectively detecting carbon elements in the standard solutions, to form a linear relationship between concentrations of the desulfurization organic components in the standard solutions and detected carbon element data; and detecting carbon elements in the to-be-measured solution, and obtaining a total concentration of the desulfurization or
    Type: Application
    Filed: April 25, 2014
    Publication date: October 30, 2014
    Applicant: Pangang Group Panzhihua Iron and Steel Research Institute Co., Ltd.
    Inventors: Yong Cheng, Jianming Li
  • Patent number: 8871164
    Abstract: SOx removal equipment for reducing sulfur oxides from flue gas from a boiler, a cooler which is provided on the downstream side of the SOx removal equipment, for reducing the sulfur oxides from 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; and a regenerator for causing the CO2 absorption liquid to emit CO2 so as to recover CO2 and regenerate the CO2 absorption liquid, and a wet type electric dust collector 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: October 28, 2014
    Assignee: Mitsubushi 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
  • Publication number: 20140314648
    Abstract: Methods related generally to the removal of atmospheric pollutants from the gas phase, are provided, as well as related apparatus, processes and uses thereof. A single-stage air scrubbing apparatus is provided that includes at least one reaction vessel, at least one introduction duct, and a turbulence component, wherein a residence time is sufficient to allow the conversion of at least one atmospheric pollution compound to at least one other compound, molecule or atom. In some embodiments, the at least one atmospheric pollution compound comprises nitrogen oxide, sulfur oxide or a combination thereof. Additionally, methods of removing atmospheric pollution compounds from a waste gas stream are disclosed that include introducing a waste gas stream and at least one additional gas stream, mist stream, liquid stream or combination thereof into a single-stage air scrubbing apparatus at a flow rate sufficient to allow for conversion of the at least one atmospheric pollution compound.
    Type: Application
    Filed: January 7, 2013
    Publication date: October 23, 2014
    Inventors: Robert George Richardson, Roger Glenn Miller, Larry Kent Barnthouse
  • Patent number: 8865097
    Abstract: A flue-gas purification system includes a flue-gas cycling system, a reactor, and an absorbent adding system having at least a catalytic absorbent, wherein the catalytic absorbent is being gasified for reacting with the flue-gas in the reactor in a homogenous gas-gas phase reacting manner. Therefore, the purification system has fast reaction rate between the pollutants of the flue-gas and the catalytic absorbent, which is preferably ammonia, to efficiently remove pollutants, so as to effectively purify the flue-gas.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: October 21, 2014
    Inventors: Baoquan Zhang, Xiaoqing Zhang
  • Publication number: 20140308191
    Abstract: A system for cleaning flue gas includes a particulate removal system; a powdered sorbent injector, for injecting powdered sorbents, positioned downstream from the particulate removal system; and a flue gas desulfurization system positioned downstream from the powdered sorbent injector.
    Type: Application
    Filed: April 14, 2014
    Publication date: October 16, 2014
    Applicant: CLEAR CARBON INNOVATIONS LLC
    Inventors: David W. Mazyck, Heather Byrne
  • Patent number: 8852540
    Abstract: An apparatus and method for removing sulfur dioxide from a flue gas is described. The apparatus has sequentially operable scrubbing zone and regeneration zone, which communicate with one another via a molten eutectic mixture of lithium, sodium and potassium carbonates. In the scrubbing zone, an ingress flue gas interacts with the molten carbonates, resulting in chemical absorbance of the sulfur dioxide and in discharge of reaction gases. In the regeneration zone, ether a chemical or electrochemical melt regeneration takes place resulting in formation of sulfur-containing vapor which is cooled down for converting the sulfur-containing vapor into a liquid and solid phase for a further collection and utilization.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: October 7, 2014
    Assignee: Yeda Research and Development Co. Ltd.
    Inventors: Igor Lubomirsky, Valery Kaplan
  • Patent number: 8808651
    Abstract: To provide a low price industrial salt by reducing facility and operation costs without electro-deposition and crystallization and through reduction in quantity of chemicals used. An industrial salt S obtained by the steps of: extracting a part of combustion gas from a kiln exhaust gas passage running from an inlet end 12b of a cement kiln 12 to a bottom cyclone 13; recovering dust D from the extracted gas G2 and washing recovered dust; and drying a filtrate L1 after the washing in a gas stream. The industrial salt can be obtained by removing a calcium component from the filtrate and drying the filtrate from which the calcium component is removed in a gas stream. Further, from the filtrate can be removed sulfate radical, and drying the filtrate from which the calcium component is removed in a gas stream to obtain the industrial salt. For the drying can be used an exhaust gas discharged from a clinker cooler 12a and a spray drier 43 may be used for the drying.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: August 19, 2014
    Assignee: Taiheiyo Cement Corporation
    Inventors: Noritoshi Tamura, Shinichiro Saito, Yoshinobu Tatsumi
  • Patent number: 8802043
    Abstract: The present invention relates generally to the field of emissions control and, in particular to a new and useful method and/or system by which to control, treat and/or mitigate various liquid-based acidic compounds that are produced during oxy-combustion (e.g., during a compression step and/or cooling step) from various gaseous acid compounds and/or gaseous acid precursor compounds (e.g., SOx, NOx, etc.). In one embodiment, the present invention relates to a method and/or system by which such one or more liquid-based acid compounds are recycled into the flue gases and/or into one or more of the emissions control and/or flue gas treatment equipment of an oxy-combustion power generation system.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: August 12, 2014
    Assignee: Babcock & Wilcox Power Generation Group, Inc.
    Inventors: Dennis K McDonald, Arthur E O Darde, Richard Dubettier
  • Publication number: 20140199224
    Abstract: The present disclosure is directed to a method for monitoring a cleaning of a process gas passing through a wet scrubber. The wet scrubber comprises an inlet zone, a contact zone and an outlet zone. The contact zone is divided into at least two sections. The method comprises measuring a concentration of sulphur dioxide in at least a first measuring point corresponding to a first section of the at least two sections of the contact zone to obtain measurement information; and comparing the measurement information to a reference value to determine a local sulphur dioxide removal performance of the first section.
    Type: Application
    Filed: August 9, 2012
    Publication date: July 17, 2014
    Applicant: ALSTOM Technology Ltd
    Inventor: Mikael Larsson
  • Patent number: 8778135
    Abstract: A circular utilization method in pulping and papermaking processes with straw Primary pulp is obtained by digesting straw raw material according to the ammonium sulfite method. Concentrated black liquor is extruded from the primary pulp; paper pulp and diluted black liquor. The concentrated black liquor and the diluted black liquor are mixed, and a contaminated condensate is obtained. A residual concentrate or the concentrated black liquor is used for preparing a fertilizer. The contaminated condensate is mixed with one or more of the waste material obtained from stock preparation, a crop byproduct or organic waste, and substrate or fertilizer is obtained by fermenting the nitrogen source of the contaminated condensate or ammonium sulfite, or using the contaminated condensate for desulfurizing flue gas. Ammonia and flue gas are reacted to obtain the ammonium sulfite as a digestion agent; and water from recycling is used in corresponding phases of the pulping process.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: July 15, 2014
    Assignee: Shandong Tralin Paper Co., Ltd.
    Inventors: Hongfa Li, Mingxin Song, Songtao Chen, Jihui Yang, Liangjin Guo
  • Patent number: 8765951
    Abstract: This invention provides novel compositions comprising substituted polyamines as acid gas scrubbing solutions and methods of using the compositions in an industrial system. The invention relates to the use of such polyamine compounds in industrial processes to remove acidic contaminants from natural and industrial fluid streams, such as natural gas, combustion gas, natural gas, synthesis gas, biogas, and other industrial fluid streams. The compositions and methods of the invention are useful for removal, absorption, or sequestration of acidic contaminants and sulfide contaminants including CO2, H2S, RSH, CS2, COS, and SO.
    Type: Grant
    Filed: May 1, 2013
    Date of Patent: July 1, 2014
    Assignee: Nalco Company
    Inventors: Alan M. Blair, Keith N. Garside, William J. Andrews, Kailas B. Sawant
  • Patent number: 8765086
    Abstract: A process for removal of H2S and CO2 from an acid gas stream comprising H2S and CO2, the process comprising the steps of: (a) reacting H2S in the acid gas stream with SO2 to form sulphur vapor and water vapor, thereby obtaining a first off-gas stream comprising CO2, water vapor, sulphur vapor, residual SO2 and residual H2S; (b) converting residual SO2 in the first off-gas stream to H2S in a first off-gas treating reactor, thereby obtaining a second off-gas stream depleted in SO2 and enriched in H2S and CO2 compared to the first off-gas stream; (c) contacting the second off-gas stream with an H2S absorbing liquid, thereby transferring H2S from the gas stream to the H2S absorbing liquid to obtain H2S absorbing liquid enriched in H2S and a third off-gas stream enriched in CO2; (d) removing CO2 from the third off-gas stream by contacting the third off-gas stream with CO2 absorbing liquid in a CO2 absorber, thereby transferring CO2 from the third off-gas stream to the CO2 absorbing liquid to obtain CO2 absorbing l
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: July 1, 2014
    Assignee: Shell Oil Company
    Inventors: Theodorus Johannes Brok, Gerardus Petrus Van Der Zwet
  • Patent number: 8765083
    Abstract: This invention provides novel compositions comprising substituted polyamines as acid gas scrubbing solutions and methods of using the compositions in an industrial system. The invention relates to the use of such polyamine compounds in industrial processes to remove acidic contaminants from natural and industrial fluid streams, such as natural gas, combustion gas, natural gas, synthesis gas, biogas, and other industrial fluid streams. The compositions and methods of the invention are useful for removal, absorption, or sequestration of acidic contaminants and sulfide contaminants including CO2, H2S, RSH, CS2, COS, and SO.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: July 1, 2014
    Assignee: Nalco Company
    Inventors: Alan M. Blair, Keith N. Garside, William J. Andrews, Kailas B. Sawant
  • Publication number: 20140165888
    Abstract: A system and method for treating flue gas that results from a combustion process is described. The method and system includes injecting an SOx absorbent reagent into the flue gas pathway at a point upstream of a selective catalytic reduction (SCR) reactor exit and downstream of a boiler exit. The method and system may also include injecting a NOx reducing agent simultaneously with the SOx absorbent reagent, either via the same injection system or via a second injection system located nearby the SOx absorbent reagent injection system. Injection of the SOx at a point upstream of the SCR reactor exit simplifies the injection systems, gas distribution systems, and physical and/or computational fluid dynamics modeling.
    Type: Application
    Filed: May 9, 2012
    Publication date: June 19, 2014
    Applicant: FLUOR TECHNOLOGIES CORPORATION
    Inventors: Dennis W. Johnson, James H. Brown
  • Publication number: 20140170046
    Abstract: Disclosed is a method and apparatus for the reduction of organic compounds and other emissions from an industrial plant utilizing a cement or minerals kiln that has a high level of organic compound emissions. The invention consists of a filter for the control of particulate emissions which has been treated with a catalyst to provide catalytic destruction of gaseous emissions as process gases are passed through the porous medium of the filter.
    Type: Application
    Filed: July 16, 2012
    Publication date: June 19, 2014
    Inventors: Iver Schmidt, Jørn Møller Rasmussen, Peter T. Paone, III, John S. Salmento
  • 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: 8734747
    Abstract: A method for treating exhaust gas is provided, which includes measuring SO3 concentration in the exhaust gas which contains at least SO2 and SO3 by using an SO3 gas analyzer; injecting fine particles into the exhaust gas after the step of measuring; cooling the exhaust gas after the step of injection, by recovering heat from the exhaust gas; collecting fly ash from the cooled exhaust gas; and removing at least SO2 from the exhaust gas after the step of collecting by absorbing the SO2 with an absorbing solution. In addition, an apparatus for treating exhaust gas is provided, which includes an SO3 gas analyzer; a fine particles injector; a heat exchanger; an electrostatic precipitator; an absorption tower; and a fine particle feed controller.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: May 27, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Satoru Sugita
  • Publication number: 20140140914
    Abstract: A flue gas treatment process and system is presented. The system includes a fan capable of moving a flue gas through a flue gas desulfurizer, direct contact cooler, and CO2 absorber, without the need for a booster fan. The system also includes a direct contact cooler and CO2 absorber that are configured to withstand gas conditions present at the flue gas desulfurizer exit. When the direct contact cooler and CO2 absorber are shutdown, the speed of the fan is lowered and the flue gas continues to flow through the cooler and CO2 absorber and out a chimney. The overall cost of installing, operating, and maintaining the system is lower than that of conventional processes and systems.
    Type: Application
    Filed: May 11, 2012
    Publication date: May 22, 2014
    Inventors: Jonathan Priest, Bill Richardson, Dennis W. Johnson
  • Patent number: 8715380
    Abstract: A method for deep desulfurization of synthesis gas comprising introducing carbonaceous material and optionally steam into a gasifier comprising a heat transfer media, extracting a first heat transfer stream comprising heat transfer media and optionally unconverted carbonaceous material from the gasifier, and introducing at least a portion of the first heat transfer stream into a combustor, introducing oxidant and optionally a fuel into the combustor, extracting a second heat transfer stream comprising heat transfer media from the combustor, and introducing at least a portion of the second heat transfer stream into the gasifier, introducing a compound capable of reacting with sulfur to produce sulfate, sulfide or both, extracting a purge stream comprising ash, sulfate, halide, or a combination thereof from the second heat transfer stream, extracting a flue gas from the combustor, and extracting a gasifier product synthesis gas stream comprising less than 1000 ppm sulfur from the gasifier.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: May 6, 2014
    Assignee: Rentech, Inc.
    Inventors: George Apanel, Harold A. Wright
  • Patent number: 8703081
    Abstract: Sorbent compositions containing halogen and calcium are added to coal to mitigate the release of sulfur and/or other harmful elements, including mercury, into the environment during combustion of coal containing natural levels of mercury.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: April 22, 2014
    Assignee: NOx II, Ltd.
    Inventor: Douglas C. Comrie
  • Patent number: 8703084
    Abstract: A method and apparatus for eliminating COS and/or CS2 from a hydrocarbon-containing feed stream, and further eliminating H2S from such feed stream or converting all sulfur species in such feed stream to H2S and SO2 to allow for easy subsequent conversion of such H2S and SO2 to elemental sulfur in a Claus reaction. The method comprises: (i) injecting water so that the feed stream contains greater than 10 vol % (water equivalent); (ii) passing the feed stream through catalyst means which hydrogenates COS and/or CS2 to H2S; (iii) injecting O2 so that the stoichiometric ratio of O2 to H2S is at least 0.5:1.0; (iv) passing the stream though a reaction zone having oxidation catalyst means which oxidizes H2S to elemental sulfur or SO2 (depending on the amount of oxygen and water added); where the temperature of the reaction zone is above the elemental sulfur dew point.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: April 22, 2014
    Assignee: Archon Technologies Ltd.
    Inventors: Conrad Ayasse, Ahmed M. Shahin, Alan Ayasse
  • Patent number: 8696931
    Abstract: A method of production of activated carbon for removal of mercury gas which provides activated carbon impregnated with both sulfur and iodine which gives a higher mercury gas adsorption performance compared with a conventional activated carbon adsorbent and also enables the prime cost of manufacture to be kept down, that is, a method of production provided with a sulfur impregnation step which adds sulfur to activated carbon and heats the mixture to obtain sulfur-impregnated activated carbon comprised of activated carbon to 100 parts by weight of which sulfur is impregnated in 5 to 20 parts by weight and, after the sulfur impregnation step, an iodine substance impregnation step which adds an aqueous solution containing iodine and an iodine salt to the sulfur-impregnated activated carbon.
    Type: Grant
    Filed: October 10, 2011
    Date of Patent: April 15, 2014
    Assignee: Futamura Kagaku Kabushiki Kaisha
    Inventors: Hideto Mamiya, Sunao Inada
  • Patent number: 8691167
    Abstract: The present invention provides for a process for handling carbonyl sulfide waste and waste metal halides produced in industrial processes and, more particularly chlorination processes. The process includes the steps of hydrolyzing the carbonyl sulfide to produce a waste stream containing hydrogen sulfide and sulfidizing the resulting hydrogen sulfide containing stream with a solution of the waste metal halides. The resulting metal sulfide and metal halide-containing stream can be neutralized before disposal of the produced waste solids.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: April 8, 2014
    Assignee: Tronox LLC
    Inventor: Harry Eugene Flynn
  • Patent number: 8679431
    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: Grant
    Filed: May 31, 2011
    Date of Patent: March 25, 2014
    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: 8679432
    Abstract: The invention relates to an adsorber, including a reaction chamber, an adsorbent having adsorption properties enabling the at least partial removal of water from a gas stream including NOx and/or SOx, and a coating essentially consisting of a polymer material on at least a portion of the inner metal wall of the reaction chamber, said polymer being resistant to the acidic liquids at temperatures above 150° C.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: March 25, 2014
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Ivan Sanchez-Molinero, Serge Moreau