Patents by Inventor Jani Lehto
Jani Lehto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20200398475Abstract: A method and apparatus for thermolysing organic material. The method comprises steps of: A) feeding the material in a single-screw extruder (100), the extruder comprising —a cylindrical rotor member (1) having diameter (D) and length (L) and comprising a feeding zone (14), —the rotor member (1) arranged in a barrel (2), —the cylindrical surface of the rotor member (1) carrying cavity/cavities and/or projection(s) (5) arranged in helically extending rows, —the helically extending row(s) of the rotor member (1) having a pitch (P) and depth (d) in the feeding zone (14) of the rotor member, wherein —the relation of the depth (d) to the diameter (D) of the rotor member, i.e. d:D, is not more than 1:20, and —the relation of the pitch (P) of the rotor member to the diameter (D) of the rotor member, i.e. P:D, is not more than 1:4, B) heating the material in the single-screw extruder (100) to a flowable state, and C) thermolysing the material.Type: ApplicationFiled: February 25, 2019Publication date: December 24, 2020Inventors: Anja OASMAA, Hannu MINKKINEN, Christian LINDFORS, Jani LEHTO, Juha MANNILA
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Patent number: 10059883Abstract: The invention relates to a method and apparatus for producing a pyrolysis product, in which raw material are fed to the pyrolysis reactor and gaseous pyrolysis product fractions and by-product fractions are formed from raw material by pyrolysis in a pyrolysis reactor. According to the invention the method comprising steps: combusting at least one by-product fraction from the pyrolysis reactor in at least two combustors, and recovering energy formed in the combustor.Type: GrantFiled: July 5, 2013Date of Patent: August 28, 2018Assignees: Valmet Technologies Oy, Teknologian Tutkimuskeskus VTT OyInventor: Jani Lehto
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Publication number: 20150166895Abstract: The invention relates to a method and apparatus for producing a pyrolysis product, in which raw material are fed to the pyrolysis reactor and gaseous pyrolysis product fractions and by-product fractions are formed from raw material by pyrolysis in a pyrolysis reactor. According to the invention the method comprising steps: combusting at least one by-product fraction from the pyrolysis reactor in at least two combustors, and recovering energy formed in the combustor.Type: ApplicationFiled: July 5, 2013Publication date: June 18, 2015Applicants: VALMET POWER OY, TEKNOLOGIAN TUTKIMUSKESKUS VTTInventor: Jani Lehto
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Patent number: 9045694Abstract: The invention relates to a method of carrying out pyrolysis process in a pyrolysis reactor for solid fuel to produce pyrolysis oil. The method comprises supplying solid fuel into a drying zone in the pyrolysis reactor for removing moisture containing gases, drying the solid fuel in the drying zone and extracting the moisture containing gases removed from the solid fuel out of the pyrolysis reactor, passing the dried solid fuel from the drying zone to the pyrolysis zone of the pyrolysis reactor, pyrolyzing the dried solid fuel for separating pyrolysis gases from the dried solid fuel and conducting the pyrolysis gases from the pyrolysis reactor to a condenser for producing pyrolysis oil.Type: GrantFiled: June 1, 2010Date of Patent: June 2, 2015Assignee: VALMET TECHNOLOGIES OYInventors: Pekka Jokela, Jani Lehto
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Patent number: 8821686Abstract: The invention relates to a method and equipment for treatment of black liquor at a pulp mill in order to recover chemicals and energy contained therein. In the invention, the black liquor is pyrolyzed in a pyrolysis reactor (4), the formed gaseous components are forwarded for utilization and the solids are mixed with water, whereby the formed solids are returned to a lime burning kiln (1) and the sodium-hydroxide-containing liquid is returned to the pulp cooking process.Type: GrantFiled: May 5, 2009Date of Patent: September 2, 2014Assignee: Valmet Power OyInventors: Jani Lehto, Kari Kuukkanen, Timo Honkola
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Patent number: 8668811Abstract: Disclosed herein is an apparatus and a method for producing a pyrolysis liquid, wherein the pyrolysis liquid is formed by means of pyrolysis from a raw material by forming, and a pyrolysis reactor, a gaseous pyrolysis product by pyrolysis and condensing it in a condenser into a pyrolysis liquid, and feeding circulation gas into the pyrolysis reactor. The circulation gas is conducted by a liquid ring compressor into the pyrolysis reactor and purified before being conducted into the pyrolysis reactor, and the pyrolysis liquid is used as the liquid layer in the liquid ring compressor.Type: GrantFiled: February 22, 2013Date of Patent: March 11, 2014Assignee: Metso Power OyInventors: Sampo Ratinen, Jani Lehto, Mikko Anttila, Tuomo Hilli, Kristin Onarheim, Ismo Hirvonen, Yrjo Solantausta, Markku Raiko
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Patent number: 8500954Abstract: The invention relates to a method and apparatus for processing the black liquor of a pulp mill to recover the chemicals and energy therein. In the invention, the black liquor is pyrolyzed in a pyrolysis reactor (6), formed gaseous components are lead for utilization, sand is returned to a fluidized-bed boiler, and solid matter is mixed with water, whereby a soda-water solution is returned to the pulping process and solid carbon to the fluidized-bed boiler (1).Type: GrantFiled: October 1, 2010Date of Patent: August 6, 2013Assignee: Metso Power OYInventors: Jani Lehto, Kari Kuukkanen, Erkki Välimäki
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Patent number: 8500959Abstract: A pyrolysis apparatus comprises a substantially closed pyrolyzer (4), a supply inlet for supplying pyrolyzable fuel to the pyrolyzer (4), an outlet for taking hot bed material in particle form out of the pyrolyzer, one or more exit outlets (6) for taking condensible gaseous substances separated from the fuel to be pyrolyzed out of the pyrolyzer, a condenser (8) for condensing the condensible gaseous substances into pyrolysis oil, and a line (7) for transferring the condensible gaseous substances from the exit outlet of the pyrolyzer (4) to the condenser (8). The means for maintaining pyrolysis conditions in the pyrolyzer (4) comprise an inlet for taking hot bed material in particle form into the pyrolyzer and means (5) for supplying fluidizing gas to the pyrolyzer. The pyrolyzer (4) is a chamber bounded directly by a furnace (1) of a bubbling fluidized bed boiler, through which chamber fluidized bed material is arranged to be circulated between the inlet and the outlet.Type: GrantFiled: March 30, 2009Date of Patent: August 6, 2013Assignee: Metso Power OyInventor: Jani Lehto
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Patent number: 8287697Abstract: A pyrolysis apparatus comprises a furnace (1) operating by fluidized bed combustion, a pyrolyzer (4) and flow paths, which connect the furnace (1) and the pyrolyzer (4) for arranging the circulation (C) of carrier material of the fluidized bed combustion between the furnace and the pyrolyzer .The apparatus also comprises a supply inlet (14) for supplying fuel to be pyrolyzed to the pyrolyzer (4), fluidizing gas supply means (5) arranged in the pyrolyzer for fluidizing the mixture of carrier material and fuel, and an outlet (6) for taking condensible gaseous substances separated from the fuel to be pyrolyzed out of the pyrolyzer (4), and a condenser for condensing the condensible gaseous substances.Type: GrantFiled: March 30, 2009Date of Patent: October 16, 2012Assignee: Metso Power OyInventors: Timo Honkola, Pasi Salonen, Jani Lehto
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Publication number: 20110247771Abstract: The invention relates to a method and apparatus for processing the black liquor of a pulp mill to recover the chemicals and energy therein. In the invention, the black liquor is pyrolyzed in a pyrolysis reactor (4), formed gaseous components are lead for utilization, sand is returned to a fluidised-bed boiler, and solid matter is mixed with water, whereby a soda-water solution is returned to the pulping process and solid carbon to the fluidised-bed boiler (1).Type: ApplicationFiled: October 1, 2010Publication date: October 13, 2011Inventors: JANI LEHTO, KARI KUUKKANEN, ERKKI VÄLIMÄKI
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Publication number: 20110120662Abstract: The invention relates to a method and equipment for treatment of black liquor at a pulp mill in order to recover chemicals and energy contained therein. In the invention, the black liquor is pyrolyzed in a pyrolysis reactor (4), the formed gaseous components are forwarded for utilization and the solids are mixed with water, whereby the formed solids are returned to a lime burning kiln (1) and the sodium-hydroxide-containing liquid is returned to the pulp cooking process.Type: ApplicationFiled: May 5, 2009Publication date: May 26, 2011Inventors: Jani Lehto, Kari Kuukkanen, Timo Konkola
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Patent number: 7758835Abstract: A method for treating fly ash of flue gas exiting a furnace of a fluidized bed boiler. A side flow conveying a first fraction of fly ash is separated from a flow conveying a second fraction of fly ash. After the separation, the side flow conveying the first fraction has a higher solids content than the flow conveying the second fraction. The first fraction of fly ash is separated from the side flow at a separation temperature of at least 400° C., whereafter the first fraction of fly ash is discharged from the process.Type: GrantFiled: December 29, 2005Date of Patent: July 20, 2010Assignee: Metso Power OyInventors: Tero Luomaharju, Jani Lehto
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Publication number: 20090242376Abstract: A pyrolysis apparatus comprises a substantially closed pyrolyzer (4), a supply inlet for supplying pyrolyzable fuel to the pyrolyzer (4), an outlet for taking hot bed material in particle form out of the pyrolyzer, one or more exit outlets (6) for taking condensible gaseous substances separated from the fuel to be pyrolyzed out of the pyrolyzer, a condenser (8) for condensing the condensible gaseous substances into pyrolysis oil, and a line (7) for transferring the condensible gaseous substances from the exit outlet of the pyrolyzer (4) to the condenser (8). The means for maintaining pyrolysis conditions in the pyrolyzer (4) comprise an inlet for taking hot bed material in particle form into the pyrolyzer and means (5) for supplying fluidizing gas to the pyrolyzer. The pyrolyzer (4) is a chamber bounded directly by a furnace (1) of a bubbling fluidized bed boiler, through which chamber fluidized bed material is arranged to be circulated between the inlet and the outlet.Type: ApplicationFiled: March 30, 2009Publication date: October 1, 2009Applicant: Metso Power OyInventor: Jani Lehto
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Publication number: 20090242377Abstract: A pyrolysis apparatus comprises a furnace (1) operating by fluidized bed combustion, a pyrolyzer (4) and flow paths, which connect the furnace (1) and the pyrolyzer (4) for arranging the circulation (C) of carrier material of the fluidized bed combustion between the furnace and the pyrolyzer The apparatus also comprises a supply inlet (14) for supplying fuel to be pyrolyzed to the pyrolyzer (4), fluidizing gas supply means (5) arranged in the pyrolyzer for fluidizing the mixture of carrier material and fuel, and an outlet (6) for taking condensible gaseous substances separated from the fuel to be pyrolyzed out of the pyrolyzer (4), and a condenser for condensing the condensible gaseous substances.Type: ApplicationFiled: March 30, 2009Publication date: October 1, 2009Applicant: Metso Power OyInventors: Timo Honkola, Pasi Salonen, Jani Lehto
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Publication number: 20060140832Abstract: A boiler plant comprises a fluidized bed boiler having a furnace (1), a flue gas duct (5) exiting the furnace, and a sorting device (8) which is arranged to separate a first fraction from the fly ash entering the flue gas duct, as well as a side duct (9) for leading the first fraction away from the sorting device (8). The boiler plant comprises a separator (10) for separating a first fly ash fraction from the flue gases flowing in the side duct (9). The sorting device (8) is arranged to separate into the side duct (9) the flue gases from a flow entering the flue gas duct (5). The flow in the side duct is more concentrated with respect to the fly ash and has a smaller gas volume than a flow that remains in the flue gas duct (5) after the sorting device (8). As to its hazard classification, the first fraction of fly ash obtained by the separator (10) corresponds to bottom ash.Type: ApplicationFiled: December 29, 2005Publication date: June 29, 2006Applicant: KVAERNER POWER OYInventors: Tero Luomaharju, Jani Lehto