Patents by Inventor Jorma Simonen
Jorma Simonen 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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Patent number: 8707911Abstract: A cooling system for air ports and other ports in furnace walls includes a cooling medium pumping system and ports provided with a cooling medium piping or channels inside the metallic port material. The liquid flow generated by the cooling medium system cools the ports. The ports are constructed of a casting material, and the ports are provided with a cooling liquid flow, which passes in a piping or pipings or channels inside the casting material of the ports.Type: GrantFiled: October 26, 2005Date of Patent: April 29, 2014Assignee: Andritz OyInventors: Kari Saviharju, Jorma Simonen, Lasse Koivisto, Markku Tanttu
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Patent number: 8640634Abstract: An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are disposed on the furnace walls on one or several levels of the furnace. A plurality of air ports are located at several horizontal elevations for introducing air into the furnace from an air supply. In the arrangement for the secondary air flows, at least two horizontal air levels at different elevations are arranged above the lower primary levels and below the black liquor sprayer. Secondary air is supplied from two opposite walls. The secondary air ports on each of said first and second horizontal elevations comprise air ports for each horizontal elevation that project a pattern of large air jets into the furnace from said opposite walls and said secondary air ports further comprise a plurality of secondary air ports on at least one of the elevations that project smaller air jets into the furnace.Type: GrantFiled: October 14, 2005Date of Patent: February 4, 2014Assignee: Andritz OyInventors: Kari Saviharju, Jorma Simonen, Raimo Paju, Jukka Savolainen, Esa Vihavainen
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Publication number: 20100101463Abstract: An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are disposed on the furnace walls on one or several levels of the furnace. A plurality of air ports are located at several horizontal elevations for introducing air into the furnace from an air supply. In the arrangement for the secondary air flows, at least two horizontal air levels at different elevations are arranged above the lower primary levels and below the black liquor sprayer. Secondary air is supplied from two opposite walls. The secondary air ports on each of said first and second horizontal elevations comprise air ports for each horizontal elevation that project a pattern of large air jets into the furnace from said opposite walls and said secondary air ports further comprise a plurality of secondary air ports on at least one of the elevations that project smaller air jets into the furnace.Type: ApplicationFiled: October 14, 2005Publication date: April 29, 2010Applicant: ANDRITZ OYInventors: Kari Saviharju, Jorma Simonen, Raimo Paju, Jukka Savolainen, Esa Vihavainen
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Patent number: 7661376Abstract: A spent liquor recovery boiler system including a boiler having a water/steam circulation system with superheaters and a furnace for recovering energy and chemicals from spent liquor combusted therein, the walls of the boiler are formed of a plurality of water-cooled tubes connected to the water/steam circulation system. The system is provided with at least one cavity having walls formed of water-cooled tubes connected to the water/steam circulation system, means for combusting a fuel and at least one outlet for discharging combustion gases to the boiler, the interior of the at least one cavity being provided with heat exchanger means for final superheating of the steam generated in the boiler, said heat exchanger means being connected to the superheaters of the boiler.Type: GrantFiled: June 6, 2003Date of Patent: February 16, 2010Assignee: Andritz OyInventors: Kari Saviharju, Jorma Simonen, Olli Arpalahti, Lasse Koivisto
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Patent number: 7640750Abstract: A spent liquor recovery boiler in the pulp and paper industry including a water/steam circulation system having superheaters, the circulation system connected to a steam turbine comprising a high-pressure part, and a furnace for burning spent liquor to produce flue gases, and including an upper portion through which the flue gases flow, wherein the steam/water circulation system of the recovery boiler is provided with a reheater for reheating steam from the high-pressure part of the turbine.Type: GrantFiled: April 21, 2006Date of Patent: January 5, 2010Assignee: Andritz OyInventors: Kari Saviharju, Jorma Simonen, Olli Arpalahti, Lasse Koivisto
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Publication number: 20090272339Abstract: A cooling system for air ports and other ports in furnace walls includes a cooling medium pumping system and ports provided with a cooling medium piping or channels inside the metallic port material. The liquid flow generated by the cooling medium system cools the ports. The ports are constructed of a casting material, and the ports are provided with a cooling liquid flow, which passes in a piping or pipings or channels inside the casting material of the ports.Type: ApplicationFiled: October 26, 2005Publication date: November 5, 2009Applicant: ANDRITZ OYInventors: Kari Saviharju, Jorma Simonen, Lasse Koivisto, Markku Tanttu
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Patent number: 7207280Abstract: An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are disposed on the furnace walls at one or several levels of the furnace. A plurality of air ports are located at several horizontal levels for introducing air into the furnace from an air supply. In the arrangement for the secondary air flows, two horizontal air levels at different elevations are arranged above the lower primary levels and below the black liquor sprayer. Secondary air is supplied from two opposite walls and the air ports from each of the two levels are located so that the air jets are introduced in an interlaced pattern having an even number of jets on one opposite wall and an uneven number of jets on the other opposite wall. The air jets of said at least two air levels are located substantially one above each other in substantially vertical rows.Type: GrantFiled: December 30, 2003Date of Patent: April 24, 2007Assignee: Andritz OyInventors: Kari Saviharju, Jorma Simonen, Liisa Simonen, Esa Vakkilainen, Esko Mattelmaki
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Publication number: 20060236696Abstract: A spent liquor recovery boiler in the pulp and paper industry including a water/steam circulation system having superheaters, the circulation system connected to a steam turbine comprising a high-pressure part, and a furnace for burning spent liquor to produce flue gases, and including an upper portion through which the flue gases flow, wherein the steam/water circulation system of the recovery boiler is provided with a reheater for reheating steam from the high-pressure part of the turbine.Type: ApplicationFiled: April 21, 2006Publication date: October 26, 2006Applicant: ANDRITZ OYInventors: Kari Saviharju, Jorma Simonen, Olli Arpalahti, Lasse Koivisto
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Publication number: 20050252458Abstract: A spent liquor recovery boiler system including a boiler having a water/steam circulation system with superheaters and a furnace for recovering energy and chemicals from spent liquor combusted therein, the walls of the boiler are formed of a plurality of water-cooled tubes connected to the water/steam circulation system. The system is provided with at least one cavity having walls formed of water-cooled tubes connected to the water/steam circulation system, means for combusting a fuel and at least one outlet for discharging combustion gases to the boiler, the interior of the at least one cavity being provided with heat exchanger means for final superheating of the steam generated in the boiler, said heat exchanger means being connected to the superheaters of the boiler.Type: ApplicationFiled: June 6, 2003Publication date: November 17, 2005Applicant: Andritz OYInventors: Kari Saviharju, Jorma Simonen, Olli Arpalahti, Lasse Koivisto
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Publication number: 20040149185Abstract: An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are disposed on the furnace walls at one or several levels of the furnace. A plurality of air ports are located at several horizontal levels for introducing air into the furnace from an air supply. In the arrangement for the secondary air flows, two horizontal air levels at different elevations are arranged above the lower primary levels and below the black liquor sprayer. Secondary air is supplied from two opposite walls and the air ports from each of the two levels are located so that the air jets are introduced in an interlaced pattern having an even number of jets on one opposite wall and an uneven number of jets on the other opposite wall. The air jets of said at least two air levels are located substantially one above each other in substantially vertical rows.Type: ApplicationFiled: December 30, 2003Publication date: August 5, 2004Applicant: Andritz OyInventors: Kari Saviharju, Jorma Simonen, Liisa Simonen, Esa Vakkilainen, Esko Mattelmaki
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Patent number: 6742463Abstract: An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are disposed on the furnace walls at one or several levels of the furnace. A plurality of air ports are located at several horizontal levels for introducing air into the furnace from an air supply. In the arrangement for the secondary air flows, two horizontal air levels at different elevations are arranged above the lower primary levels and below the black liquor sprayer. Secondary air is supplied from two opposite walls and the air ports from each of the two levels are located so that the air jets are introduced in an interlaced pattern having an even number of jets on one opposite wall and an uneven number of jets on the other opposite wall. The air jets of said at least two air levels are located substantially one above each other in substantially vertical rows.Type: GrantFiled: April 5, 2002Date of Patent: June 1, 2004Assignee: Andritz OyInventors: Kari Saviharju, Jorma Simonen, Liisa Simonen, Esa Vakkilainen, Esko Mattelmäki
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Publication number: 20040011484Abstract: A method to produce energy at a pulp mill, including the steps of: combusting pulping process waste liquor in the furnace of a recovery boiler to generate flue gases, recovering the heat from the flue gases by producing saturated and/or partially superheated steam in the recovery boiler, gasifying wood, bark or wood wastes in a gasifier for producing a combustible gas, burning at least part of the combustible gas in a superheating boiler, and superheating the saturated and partially superheated steam in the superheating boiler to produce superheated steam.Type: ApplicationFiled: April 25, 2003Publication date: January 22, 2004Applicant: Andritz Oy, Helsinki, FinlandInventors: Kari Saviharju, Jorma Simonen, Olli Arpalahti, Lasse Koivisto
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Patent number: 6647726Abstract: The invention relates to a method and an arrangement in the production of electric energy in a boiler plant of a pulp mill. Black liquor having a dry solids content of more than 80% and combustion air are fed into a furnace of a recovery boiler for combusting black liquor and recovering chemicals contained therein. The flue gases generated in the combustion are led into an economizer of the recovery boiler, in which economizer the feed water for the boiler is heated, and after the economizer to gas cleaning. The feed water is led from the economizer onto the steam-generating bank at a temperature below the saturation temperature and further into a superheater to produce steam having a pressure of more than 80 bar. The steam is led from the recovery boiler to a steam turbine to produce electricity. The temperature of the feed water being led into the economizer is regulated by means of bleed steam of the turbine so that the flue gases exit the economizer at a temperature of more than 250° C.Type: GrantFiled: May 29, 2002Date of Patent: November 18, 2003Assignee: Andritz OyInventors: Kari Saviharju, Jorma Simonen
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Patent number: 6579091Abstract: A cleaning device is disclosed for cleaning an air port in a wall of a furnace having an air register adjacent to the air port outside of the wall of the furnace, the cleaning device comprising: a cleaning head having a substantially-open, cross-sectional shape conforming to a cross-sectional shape of the air port, said clean head moving reciprocally in and out of the air port, and a head support extending from the cleaning head, through the air register and attached to an actuator, said actuator reciprocally moving the head support, and said head support having perforated walls permitting to flow through the walls.Type: GrantFiled: March 7, 2002Date of Patent: June 17, 2003Assignee: Andritz OyInventor: Jorma Simonen
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Publication number: 20020194849Abstract: The invention relates to a method and an arrangement in the production of electric energy in a boiler plant of a pulp mill. Black liquor having a dry solids content of more than 80% and combustion air are fed into a furnace of a recovery boiler for combusting black liquor and recovering chemicals contained therein. The flue gases generated in the combustion are led into an economizer of the recovery boiler, in which economizer the feed water for the boiler is heated, and after the economizer to gas cleaning. The feed water is led from the economizer onto the steam-generating bank at a temperature below the saturation temperature and further into a superheater to produce steam having a pressure of more than 80 bar. The steam is led from the recovery boiler to a steam turbine to produce electricity. The temperature of the feed water being led into the economizer is regulated by means of bleed steam of the turbine so that the flue gases exit the economizer at a temperature of more than 250° C.Type: ApplicationFiled: May 29, 2002Publication date: December 26, 2002Inventors: Kari Saviharju, Jorma Simonen
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Publication number: 20020162491Abstract: An arrangement is disclosed for supplying an air jet form to the furnace of a recovery boiler, where the furnace has a front wall, a rear wall and side walls. Black liquor spraying devices are disposed on the furnace walls at one or several levels of the furnace. A plurality of air ports are located at several horizontal levels for introducing air into the furnace from an air supply. In the arrangement for the secondary air flows, two horizontal air levels at different elevations are arranged above the lower primary levels and below the black liquor sprayer. Secondary air is supplied from two opposite walls and the air ports from each of the two levels are located so that the air jets are introduced in an interlaced pattern having an even number of jets on one opposite wall and an uneven number of jets on the other opposite wall. The air jets of said at least two air levels are located substantially one above each other in substantially vertical rows.Type: ApplicationFiled: April 5, 2002Publication date: November 7, 2002Applicant: Andritz-Ahlstrom OyInventors: Kari Saviharju, Jorma Simonen, Liisa Simonen, Esa Vakkilainen, Esko Mattelmaki
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Patent number: 6024028Abstract: A method and apparatus for extending the life of air ports and nozzles in furnaces, particularly recovery boilers for burning black liquor to produce heat and a chemical melt. Apparatus is provided for feeding combustion air into a furnace having a tube wall, the apparatus comprising: an air port disposed in the tube wall, and connected to an air duct through which air flows into and then through the air port, and into the furnace; and a protective insert of heat conductive and heat and corrosion resistant material mounted in the air port and positioned so that it is cooled by the air flowing through the air port. The protective insert has sufficient thermal mass (e.g. a volume of between 40,000-4,000,000 cubic mm) so as to effectively even out temperature peaks caused by melt splashes from the furnace impacting the vicinity of the air port, e. g. the protective insert is made out of highly corrosion resistant steel such as stainless steel.Type: GrantFiled: March 11, 1998Date of Patent: February 15, 2000Assignee: Ahlstrom Machinery OyInventor: Jorma Simonen