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公开(公告)号：US11598522B2
公开(公告)日：2023-03-07
申请号：US17066733
申请日：2020-10-09
发明人： Russell James Hewertson , Shailesh Pradeep Gangoli , J. Bruce Kenworthy , Xiaoyi He , Anup Vasant Sane
摘要： A method of melting a charge in a double-pass tilt rotary furnace having a door, including operating a first burner at a first firing rate, the first burner being mounted in a lower portion of the door and producing a first flame having a length; operating a second burner at a second firing rate, the second burner being mounted in an upper portion of the door and producing a second flame having a length, the second flame being distal from the charge relative to the first flame; in an initial phase when the solids in the charge impede the first flame, controlling the second firing rate to be greater than the first firing rate; and in an later phase after melting of the solids in the charge sufficiently that the first flame is not impeded, controlling the first firing rate to be greater than the second firing rate.
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公开(公告)号：US11365880B2
公开(公告)日：2022-06-21
申请号：US16457774
申请日：2019-06-28
发明人： Chris Edward Vandegrift , Thomas D. Briselden , Mitchell D. Cornelius , Anthony J. Zambanini , Thomas M. Reilly
摘要： Embodiments of the present invention include high-temperature staged recirculating burners and radiant tube burner assemblies that provide high efficiency, low NOx and CO emissions, and uniform temperature characteristics. One such staged recirculating burner includes a combustion tube having inside and outside helical fins forming opposing spiral pathways for combustion gases and products of combustion, a combustion nozzle coupled to the combustion tube, a gas tube running axially into the combustion tube, and a staging gas nozzle coupled to the gas tube, where the staging gas nozzle includes radial exit holes into the combustion tube and an axial gas staging tube extending into the combustion nozzle to stage combustion.
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公开(公告)号：US20220143570A1
公开(公告)日：2022-05-12
申请号：US17521227
申请日：2021-11-08
发明人： George M. Bollas , Chen Chen
摘要： Systems/methods for continuous operation of fixed bed reactors using gaseous fuels for the purpose of power generation through integration with a combined cycle power plant are provided. The fixed bed reactors are assumed to operate in a semi-batch mode composed of reactor modules that are integrated into module trains that comprise the chemical-looping combustion island of the power plant. The scheduling of each reactor train is cast as an optimization problem that maximizes thermodynamic efficiency subject to constraints imposed to each reactor and the entire island. When the chemical-looping reactors are arranged cyclically, each feeding to or being fed from another reactor, in an operating scheme that mimics simulated moving bed reactors, the thermodynamic efficiency of the reactor island can be improved. Allowing the reversal of module order in the cyclically arranged reactor modules further improves the overall thermodynamic efficiency (to 84.7%), while satisfying constraints imposed for carbon capture, fuel conversion, power plant safety and oxygen carrier stability.
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公开(公告)号：US11105502B2
公开(公告)日：2021-08-31
申请号：US16443037
申请日：2019-06-17
发明人： Richard R. Martin , Colin J. Deller
摘要： A insert for a staged fuel burner and processes for using a burner with the insert. The insert has a burner tip that injects a mixture of primary fuel and combustion air into a combustion zone to produce a flame. A staged fuel is also injected into the combustion zone. Prior to being injected into the combustion zone, from the burner tip, the staged fuel, is injected into the burner tip and draws combustion air from the mixer of the burner insert into the burner tip with the staged fuel.
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公开(公告)号：US20210190310A9
公开(公告)日：2021-06-24
申请号：US16777826
申请日：2020-01-30
IPC分类号： F23C9/08 , F23D14/04 , F23D14/64 , F23D14/82 , F23Q9/00 , F23D14/26 , F23D14/14 , F23C6/04 , F23K5/00 , F23L7/00
摘要： A burner includes a distal flame holder, first and second fuel nozzles, a fuel and oxidant source, and a mixing tube disposed upstream from the distal flame holder. Fuel emitted from the first fuel nozzle mixes with oxidant from the oxidant source to form a fuel and oxidant mixture to support combustion in the distal flame holder. A non-reactive fluid source such as recirculated flue gas provides a non-reactive fluid for dilution of the fuel and oxidant mixture to prevent flashback.
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公开(公告)号：US20210180788A1
公开(公告)日：2021-06-17
申请号：US17188147
申请日：2021-03-01
发明人： Ernst Schroeder , Alex Knoch , Karin Kluthe , Giovanni Loggia , Martin Heuser , Silke Liedkte , Michael Albrecht
摘要： A gas burner for use in low-oxygen environments in which the oxygen concentration is insufficient to ensure complete combustion. The burner includes a central air supply that is annularly surrounded by a gas supply, thereby preventing the fuel from burning out with a delay in places where burn-out is detrimental to a system or plant.
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公开(公告)号：US20210180250A1
公开(公告)日：2021-06-17
申请号：US16771509
申请日：2018-12-13
发明人： Matti KYTÖ
摘要： A method for burning primary fuel (F1), wherein the primary fuel (F1) comprises at least a first compound containing nitrogen and a second compound comprising sulfur. The method comprises producing primary combustion gas (G1) having a temperature of at least 450° C. and comprising oxygen; feeding the primary fuel (F1) and the primary combustion gas (G1) to a primary process zone (Z1) of a furnace (200); feeding tertiary combustion gas (G3) to a secondary process zone (Z2) of the furnace (200); letting the primary fuel (F1), the primary combustion gas (G1), and/or their reaction products to move from the primary process zone (Z1) via the secondary process zone (Z2) to a tertiary process zone (Z3) of the furnace (200); and feeding quaternary combustion gas (G4) comprising oxygen to the tertiary process zone (Z3) of the furnace (200). An embodiment comprises collecting the primary fuel (F1) from a pulp process. A corresponding system.
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公开(公告)号：US20210116125A1
公开(公告)日：2021-04-22
申请号：US17066733
申请日：2020-10-09
发明人： RUSSELL JAMES HEWERTSON , SHAILESH PRADEEP GANGOLI , J. BRUCE KENWORTHY , XIAOYI HE , ANUP VASANT SANE
摘要： A method of melting a charge in a double-pass tilt rotary furnace having a door, including operating a first burner at a first firing rate, the first burner being mounted in a lower portion of the door and producing a first flame having a length; operating a second burner at a second firing rate, the second burner being mounted in an upper portion of the door and producing a second flame having a length, the second flame being distal from the charge relative to the first flame; in an initial phase when the solids in the charge impede the first flame, controlling the second firing rate to be greater than the first firing rate; and in an later phase after melting of the solids in the charge sufficiently that the first flame is not impeded, controlling the first firing rate to be greater than the second firing rate.
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公开(公告)号：US20210080102A1
公开(公告)日：2021-03-18
申请号：US16630538
申请日：2018-05-29
发明人： Pierre-Jerome Borrel , Eric Blake , Martin Hamman
摘要： A method for treating a metal strip, where the metal strip undergoes heat treatment in a directly fired furnace and is subsequently heat-treated further in a radiant tube furnace. At least part of the exhaust gases from the radiant tubes is fed to the directly fired furnace.
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公开(公告)号：US20210063013A1
公开(公告)日：2021-03-04
申请号：US17001263
申请日：2020-08-24
申请人： Gautschi Engineering GmbH , EBNER Industrieofenbau GmbH , HPI High Performance Industrietechnik GmbH
发明人： Werner Wiggen , Markus Mayrhofer , Michael Koller , Andreas Kraly
摘要： The invention relates to a burner with a refractory burner body 1, 2, 3 for burning liquid or aerosol fuels, in particular, gaseous fuels. With the aim of reducing NOx emissions, the burner body comprises a gas nozzle 7, 9, 10, 11 and a plurality of air nozzles 4, 6, which are at least partially formed as integral mouldings in the burner body and flow out on a front side 16 of the burner body. Here, the air nozzles are symmetrically arranged around the gas nozzle and diverge at an angle α to the gas nozzle. Likewise, the invention relates to a method for burning liquid or aerosol fuels, in particular, gaseous fuels with reduced NOx emissions.
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