Patents Assigned to Marsulex Environmental Technologies
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Patent number: 11117095Abstract: Conversion methods and equipment for converting a calcium-based flue gas desulfurization (FGD) system to an ammonia-based FGD systems, including modifying a reagent system and absorber system of the calcium-based FGD system to be capable of, respectively, delivering an ammonia-based reagent to the absorber system rather than the calcium-based reagent, and modifying the absorber system to increase capacity of a reaction tank thereof.Type: GrantFiled: January 4, 2021Date of Patent: September 14, 2021Assignee: Marsulex Environmental Technologies CorporationInventors: Barry Wayne Stolzman, Michael Lyn Mengel, Michael Tom Hammer
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Patent number: 10968144Abstract: Systems and methods for producing potassium sulfate. Such a method involves providing an industrial waste material that includes at least one metal sulfate or a metal product that has been reacted with sulfuric acid to produce metal sulfates, and then reacting the metal sulfate with potassium carbonate to produce a byproduct that contains potassium sulfate.Type: GrantFiled: October 8, 2019Date of Patent: April 6, 2021Assignee: Marsulex Environmental Technologies CorporationInventors: Michael L. Mengel, Michael T. Hammer, Barry W. Stolzman
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Patent number: 10882006Abstract: Conversion methods and equipment for converting a calcium-based flue gas desulfurization (FGD) system to an ammonia-based FGD systems, including modifying a reagent system and absorber system of the calcium-based FGD system to be capable of, respectively, delivering an ammonia-based reagent to the absorber system rather than the calcium-based reagent, and modifying the absorber system to increase capacity of a reaction tank thereof.Type: GrantFiled: October 8, 2018Date of Patent: January 5, 2021Assignee: Marsulex Environmental Technologies CorporationInventors: Barry Wayne Stolzman, Michael Lyn Mengel, Michael Tom Hammer
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Patent number: 10850230Abstract: Processes and systems for producing potassium sulfate as a byproduct of a desulfurization process. Sulfur dioxide is absorbed from a flue gas using an ammonia-containing solution to produce an ammonium sulfate solution that contains dissolved ammonium sulfate. At least a first portion of the ammonium sulfate solution is heated before dissolving potassium chloride therein to form a slurry that contains potassium sulfate crystals and an ammonium chloride solution. The slurry is then cooled to precipitate additional potassium sulfate crystals, after which the potassium sulfate crystals are removed to yield a residual ammonium chloride solution that contains dissolved ammonium chloride and residual dissolved potassium sulfate. Ammonia is then absorbed into the residual ammonium chloride solution to further precipitate potassium sulfate crystals, which are removed to yield a residual ammonium chloride solution that is substantially free of dissolved potassium sulfate.Type: GrantFiled: July 30, 2018Date of Patent: December 1, 2020Assignee: Marsulex Environmental Technologies CorporationInventor: Eli Gal
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Patent number: 10603624Abstract: Systems, apparatuses, and processes for controlling free ammonia in wet flue gas desulfurization processes in which an ammonia-containing scrubbing solution is used to produce ammonium sulfate. Such an apparatus includes an absorber having a contactor region through which a flue gas comprising sulfur dioxide is able to flow and a reaction tank containing a scrubbing solution containing ammonium sulfate. The tank has a sidewall and bottom wall that define the perimeter and bottom of the tank. Lance-agitator units are distributed around the perimeter of the tank, each having a lance that injects a mixture of oxygen and a dilute ammonia-containing fluid toward the bottom of the tank and an agitator that agitates the mixture and propels the mixture toward the bottom of the tank. The apparatus includes a source of the mixture of oxygen and dilute ammonia-containing fluid, and recirculates the scrubbing solution from the tank to the contactor region.Type: GrantFiled: June 27, 2018Date of Patent: March 31, 2020Assignee: Marsulex Environmental Technologies CorporationInventors: Michael Lyn Mengel, Amy P. Evans
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Patent number: 10246330Abstract: A process and system for hydrogen sulfide capture from gas streams employing an absorber vessel in which the gas stream containing hydrogen sulfide is contacted with an absorbent solution to remove the hydrogen sulfide from the gas stream. The process and system may further employ an oxidation vessel in which sulfides and/or bisulfides in the absorbent solution are oxidized to produce a thiosulfate and/or sulfate, yielding a solution that can be used as fertilizer or other applications.Type: GrantFiled: April 13, 2017Date of Patent: April 2, 2019Assignee: Marsulex Environmental Technologies CorporationInventors: Michael Lyn Mengel, Amy Patrice Evans, Eli Gal, Paul Murray Leicht
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Patent number: 10046268Abstract: Flue gas desulfurization processes and systems that utilize ammonia as a reactant, and in which any hydrogen sulfide and/or mercaptans within the ammonia are separated during the desulfurization process so as to prevent their release into the atmosphere. The process and system entail absorbing acidic gases from a flue gas with a scrubbing media containing ammonium sulfate to produce a stream of scrubbed flue gas, collecting the scrubbing media containing the absorbed acidic gases, injecting into the collected scrubbing media a source of ammonia that is laden with hydrogen sulfide and/or mercaptans so that the injected ammonia is absorbed into and reacted with the collected scrubbing media, stripping the hydrogen sulfide and/or mercaptans from the collected scrubbing media by causing the hydrogen sulfide and/or mercaptans to exit the collected scrubbing media as stripped gases, and collecting the stripped gases without allowing the stripped gases to enter the stream of scrubbed flue gas.Type: GrantFiled: March 29, 2016Date of Patent: August 14, 2018Assignee: Marsulex Environmental Technologies CorporationInventor: Eli Gal
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Patent number: 10046272Abstract: Processes and systems for producing potassium sulfate as a byproduct of a desulfurization process. Sulfur dioxide is absorbed from a flue gas using an ammonia-containing solution to produce an ammonium sulfate solution that contains dissolved ammonium sulfate. At least a first portion of the ammonium sulfate solution is heated before dissolving potassium chloride therein to form a slurry that contains potassium sulfate crystals and an ammonium chloride solution. The slurry is then cooled to precipitate additional potassium sulfate crystals, after which the potassium sulfate crystals are removed to yield a residual ammonium chloride solution that contains dissolved ammonium chloride and residual dissolved potassium sulfate. Ammonia is then absorbed into the residual ammonium chloride solution to further precipitate potassium sulfate crystals, which are removed to yield a residual ammonium chloride solution that is substantially free of dissolved potassium sulfate.Type: GrantFiled: October 27, 2015Date of Patent: August 14, 2018Assignee: Marsulex Environmental Technologies, Corp.Inventor: Eli Gal
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Patent number: 9327232Abstract: A system and method suitable for the removal of pollutants from gases with a circulating dry scrubber system having a circulating dry scrubber reactor containing a fluidized bed adapted to contact the gas with a dry reagent within the fluidized bed. The system includes a housing fluidically coupled to the reactor, a filter array within the housing, and an internal hopper within the housing and adapted to return at least some of the particulates to the fluidized bed within the circulating dry scrubber reactor. The scrubbed gas stream exits the circulating dry scrubber reactor and flows upward between an interior of the housing and an exterior of the internal hopper before contacting the filter array. The exterior of the internal hopper is exposed to the scrubbed gas stream, and the scrubbed gas stream is not recirculated to the circulating dry scrubber reactor to maintain the fluidized bed therein.Type: GrantFiled: October 3, 2014Date of Patent: May 3, 2016Assignee: Marsulex Environmental Technologies CorporationInventor: Rodney Alan Hendricksen
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Patent number: 9327234Abstract: A flue gas desulfurization process and system that utilize ammonia as a reactant, and in which any hydrogen sulfide and/or mercaptans within the ammonia are separated during the desulfurization process so as to prevent their release into the atmosphere. The process and system entail absorbing acidic gases from a flue gas with a scrubbing media containing ammonium sulfate to produce a stream of scrubbed flue gas, collecting the scrubbing media containing the absorbed acidic gases, injecting into the collected scrubbing media a source of ammonia that is laden with hydrogen sulfide and/or mercaptans so that the injected ammonia is absorbed into and reacted with the collected scrubbing media, stripping the hydrogen sulfide and/or mercaptans from the collected scrubbing media by causing the hydrogen sulfide and/or mercaptans to exit the collected scrubbing media as stripped gases, and collecting the stripped gases without allowing the stripped gases to enter the stream of scrubbed flue gas.Type: GrantFiled: March 17, 2010Date of Patent: May 3, 2016Assignee: Marsulex Environmental Technologies CorporationInventor: Eli Gal
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Patent number: 8353980Abstract: An apparatus and process for removing acidic gases from flue gases produced by, for example, utility and industrial facilities. The acidic gases are removed as the flue gas flows upward through a contact zone within a passage, where the flue gas is contacted with an ammonium sulfate-containing scrubbing solution to absorb the acidic gases from the flue gas. The scrubbing solution and absorbed acidic gases therein are then accumulated, and ammonia and an oxygen-containing gas are injected into the accumulated scrubbing solution to react the absorbed acidic gases and produce ammonium sulfate. An acid solution is flowed across the passage above the contact zone of the passage, and the scrubbed flue gas is flowed upward through the acid solution to remove unreacted ammonia from the scrubbed flue gas. The acid solution is then removed from the passage after the acid solution has been contacted by the scrubbed flue gas.Type: GrantFiled: December 3, 2009Date of Patent: January 15, 2013Assignee: Marsulex Environmental Technologies CorporationInventor: David William Murphy
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Patent number: 7771685Abstract: A flue gas desulfurization process and system that utilize ammonia as a reactant, and in which any hydrogen sulfide and/or mercaptans within the ammonia are separated during the desulfurization process so as to prevent their release into the atmosphere. The process and system entail absorbing acidic gases from a flue gas with a scrubbing media containing ammonium sulfate to produce a stream of scrubbed flue gas, collecting the scrubbing media containing the absorbed acidic gases, injecting into the collected scrubbing media a source of ammonia that is laden with hydrogen sulfide and/or mercaptans so that the injected ammonia is absorbed into and reacted with the collected scrubbing media, stripping the hydrogen sulfide and/or mercaptans from the collected scrubbing media by causing the hydrogen sulfide and/or mercaptans to exit the collected scrubbing media as stripped gases, and collecting the stripped gases without allowing the stripped gases to enter the stream of scrubbed flue gas.Type: GrantFiled: April 25, 2008Date of Patent: August 10, 2010Assignee: Marsulex Environmental Technologies, CorpInventor: Eli Gal
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Patent number: 7574968Abstract: A method and apparatus is provided for use in combustion system for capturing gas phase pollutants such as SO3. In one example, the invention uses a computer model to model the combustion system. Particles are injected into the combustion system to capture the gas phase pollutants. The model is used to determine the injection location, as well as the size and amount of the particles to be injected.Type: GrantFiled: September 19, 2003Date of Patent: August 18, 2009Assignees: Energy & Environmental Research Center, Marsulex Environmental Technologies Corporation, Alstom Technolog LtdInventors: Donald McCollor, Steven Benson, Bernard Hamel, Robin Rhodes
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Patent number: 6958133Abstract: An apparatus and process for removing acidic gases and NOx from flue gases produced by utility and industrial plants. The process and apparatus convert NOx, and particularly nitric oxide, to nitrogen dioxide, which is then reacted to form a valuable byproduct. The process generally entails contacting a flue gas with a scrubbing medium to absorb acidic gases from flue gas and produce an intermediate flue gas. The intermediate flue gas is then cooled to cause nitric oxide present therein to be oxidized to form nitrogen dioxide, which is then absorbed from the flue gases to produce a nitrogen dioxide-containing solution and a scrubbed flue gas. The nitrogen dioxide in the nitrogen dioxide-containing solution is then reacted with ammonium hydroxide to form ammonium nitrate as a valuable byproduct.Type: GrantFiled: May 6, 2004Date of Patent: October 25, 2005Assignee: Marsulex Environmental Technologies, Corp.Inventors: Michael T. Hammer, Michael L. Mengel
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Patent number: 6759022Abstract: An apparatus and process for removing acidic gases and NOx from flue gases produced by utility and industrial plants. The process and apparatus convert NOx, and particularly nitric oxide, to nitrogen dioxide, which is then reacted to form a valuable byproduct. The process generally entails contacting a flue gas with a scrubbing medium to absorb acidic gases from flue gas and produce an intermediate flue gas. The intermediate flue gas is then cooled to cause nitric oxide present therein to be oxidized to form nitrogen dioxide, which is then absorbed from the flue gases to produce a nitrogen dioxide-containing solution and a scrubbed flue gas. The nitrogen dioxide in the nitrogen dioxide-containing solution is then reacted with ammonium hydroxide to form ammonium nitrate as a valuable byproduct.Type: GrantFiled: June 5, 2002Date of Patent: July 6, 2004Assignee: Marsulex Environmental TechnologiesInventors: Michael T. Hammer, Michael L. Mengel
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Publication number: 20030228246Abstract: An apparatus and process for removing acidic gases and NOx from flue gases produced by utility and industrial plants. The process and apparatus convert NOx, and particularly nitric oxide, to nitrogen dioxide, which is then reacted to form a valuable byproduct. The process generally entails contacting a flue gas with a scrubbing medium to absorb acidic gases from flue gas and produce an intermediate flue gas. The intermediate flue gas is then cooled to cause nitric oxide present therein to be oxidized to form nitrogen dioxide, which is then absorbed from the flue gases to produce a nitrogen dioxide-containing solution and a scrubbed flue gas. The nitrogen dioxide in the nitrogen dioxide-containing solution is then reacted with ammonium hydroxide to form ammonium nitrate as a valuable byproduct.Type: ApplicationFiled: June 5, 2002Publication date: December 11, 2003Applicant: Marsulex Environmental Technologies, LLCInventors: Michael T. Hammer, Michael L. Mengel
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Patent number: 6638342Abstract: A process and system for producing fertilizers with reduced levels of contaminants, and particularly a flue gas scrubbing process and facility that produce a fertilizer byproduct which is treated to remove heavy metals originally present in the scrubbed flue gas. The process entails contacting a flue gas with a scrubbing solution to remove acidic gases and produce a byproduct containing a fertilizer compound precipitate and dissolved metals and/or metal compounds. A fertilizer solution containing dissolved fertilizer and dissolved metals and/or metal compounds is then produced by adding water to the byproduct, after which the pH of the fertilizer solution is adjusted one or more times with a gaseous and/or liquid alkali to form precipitates of one or more metal species. The precipitates are then removed from the fertilizer solution and the solution dewatered to yield a fertilizer product with lower contaminant levels.Type: GrantFiled: November 28, 2001Date of Patent: October 28, 2003Assignee: Marsulex Environmental TechnologiesInventors: Raymond R. Gansley, Michael T. Hammer, Michael L. Mengel
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Patent number: 6550751Abstract: A gas-liquid contactor for removing gases and particulate matter from flue gases produced by processing operations of the type carried out in utility and industrial plants. The contactor is generally an open spray absorber having a spray tower (110) whose walls (114) form a passage within the tower (110). Flue gases are introduced into the tower (110) so as to flow vertically upward or downward through the passage. Disposed within the passage are heads (116) for introducing a liquid (118) into the passage such that the liquid (118) contacts the flue gases. A portion of the liquid (118) contacts the wall (114) of the tower (110), such that the portion of the liquid (118) flows downwardly along the wall (114). The tower (110) is equipped with a deflecting device (122) disposed on the wall (114) for deflecting the portion of the liquid (118) away from the wall (114), and thereafter reintroducing the portion of the liquid (118) into the passage so as to contact the gases flowing through the passage.Type: GrantFiled: November 26, 1997Date of Patent: April 22, 2003Assignee: Marsulex Environmental Technologies Corp.Inventors: Gregory Norman Brown, Raymond Raulfs Gansley, Michael Lyn Mengel, Eli Gal
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Patent number: 6277343Abstract: An apparatus and process for removing acidic gases, such as sulfur dioxide, hydrogen chloride and hydrogen fluoride, from flue gases produced by processing operations of the type carried out in utility and industrial plants. The apparatus is generally a gas-liquid contactor whose operation uses an ammonium sulfate-containing scrubbing solution to absorb acidic gases from flue gases, and into which oxygen and ammonia are then injected to react with the absorbed sulfur dioxide to produce ammonium sulfate as a valuable byproduct. The oxygen and ammonia are not introduced together into the scrubbing solution, but instead are introduced sequentially and in a manner so that the oxidation first occurs in a relatively low pH solution as a result of the absorbed acidic gases. The ammonia is then added to the solution in a manner that inhibits or prevents intermixing of the ammonia with the majority of the solution, but is present in the solution when recycled for further absorption of acidic gases.Type: GrantFiled: September 23, 1999Date of Patent: August 21, 2001Assignee: Marsulex Environmental Technologies, LLCInventors: Raymond R. Gansley, Michael L. Mengel
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Patent number: 6254843Abstract: A method of producing calcium sulfate with a flue gas scrubbing facility having a gas-liquid contactor that uses a calcium-based slurry to absorb sulfur dioxide from a flue gas containing acidic gases, wherein a byproduct containing calcium sulfite precipitate is produced that is accumulated in a reservoir, such as a pond, apart from the gas-liquid contactor. Such a facility is modified to produce calcium sulfate by installing an acidifier vessel and an oxidation receptacle in series between a source of the flue gas and the gas-liquid contactor. The flue gas containing the acidic gases is caused to flow through the acidifier vessel, into which the byproduct is delivered from the reservoir so that some of the acidic gases of the flue gas are absorbed by the byproduct and the pH of the byproduct is sufficiently lowered to allow the calcium sulfite precipitate to dissolve in the byproduct.Type: GrantFiled: November 19, 1999Date of Patent: July 3, 2001Assignee: Marsulex Environmental Technologies, LLCInventors: Gregory N. Brown, Michael L. Mengel