Tumbler-type Rotary - Drum Furnace Patents (Class 432/103)
  • Patent number: 9932524
    Abstract: The present invention is directed to processing feedstock materials for recovery, recycling and/or reuse of the constituent components of the feedstock materials, and includes adding feedstock materials at a constant temperature to a thermal reactor, heating the feedstock materials at a temperature of 1,100° F. or higher in an anaerobic environment within the thermal reactor to produce cracked and gasified hydrocarbons and residual material, removing cracked and gasified hydrocarbons released from the feedstock materials from the thermal reactor, further processing the residual material to recover one or more constituent component of the feedstock materials, and oxidizing the cracked and gasified hydrocarbons removed from the thermal reactor having five or less carbon atoms in their molecular structure in order to produce heat to obtain the temperature of 1,100° F. or higher for the thermal reactor.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: April 3, 2018
    Assignee: MODERN RECOVERY SYSTEMS, INC.
    Inventors: Douglas D. Griffin, II, Joachim P. Roesler
  • Patent number: 9683336
    Abstract: An asphalt plant adapted to use RAP to produce asphalt. The preferred asphalt plant comprises a bin that is adapted to store the RAP, a heat source that is adapted to supply heat, a dryer that is adapted to dry the RAP, a mixer that is adapted the mix the RAP and a means for conveying the RAP from the bin to the dryer. The preferred asphalt plant uses substantially only the RAP to produce asphalt. A method for producing asphalt from RAP comprising providing an asphalt plant adapted to use the RAP to produce asphalt. The preferred method further comprises conveying the RAP from the bin to the dryer, drying the RAP, and mixing the RAP.
    Type: Grant
    Filed: April 16, 2012
    Date of Patent: June 20, 2017
    Assignee: Astec, Inc.
    Inventor: Malcolm Swanson
  • Patent number: 8915733
    Abstract: A method of heating a charge material by controlling heat flux in a tilt rotary furnace is disclosed. Combustion by the burner forms a heat release profile including a high heat flux region. The positioning of the high heat flux region is controllable by providing a controlled amount of secondary or staged oxidant. The burner is configured and controlled to position a region of high heat flux at a position corresponding to an area requiring greater heating, such as the area of maximum charge depth in the furnace to provide substantially uniform melting and heat distribution.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: December 23, 2014
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Jin Cao, Xiaoyi He, Aleksandar Georgi Slavejkov
  • Publication number: 20140318420
    Abstract: Disclosed is a process for calcining active blending material involving feeding material outside of a kiln head and the blending material obtained. The process comprises feeding material from outside of kiln head of rotary kiln into inside of kiln hood and to grate cooler, wherein the material is coal gangue, shale, clay, peat, mud and the like which can form active cement component through low temperature calcining, and calcining the material at low temperature. Disclosed also is a cement production apparatus for carrying out the process provided, comprising feeder nose(s) provided on the kiln hood and/or grate cooler for feeding the material.
    Type: Application
    Filed: May 22, 2012
    Publication date: October 30, 2014
    Inventor: Zhengliang Qi
  • Patent number: 8703079
    Abstract: A method for feeding lime mud into a lime kiln including a rotary kiln shell having an interior between a first end wall and a second end wall, the method including: feeding the lime mud into a flue gas flow in the interior of the rotary kiln shell or in close proximity to the shell to pretreat the lime mud; separating the pretreated lime mud from the flue gas flow; conveying the separated lime mud into the lime kiln, and calcining the separated lime mud in the lime kiln.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: April 22, 2014
    Assignee: Andritz Oy
    Inventor: John Mahlon Leichliter, III
  • Patent number: 8695515
    Abstract: A method for burning raw materials by which method the raw material and a secondary fuel are separately introduced to one and the same rotary kiln in which the raw material as well as the secondary fuel are heated by gases formed by burning of a primary fuel in the rotary kiln so that the secondary fuel is converted to gases and solid matter in the form of combustion residues such as ashes and coke. The secondary fuel during the process of conversion to gases and solid matter is kept separate from the introduced raw material, which may ensure that the secondary fuel and hence the locally reducing zones and major areas with reducing conditions are brought into minimum contact with the raw material.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: April 15, 2014
    Assignee: FLSmidth A/S
    Inventors: Lars Skaarup Jensen, Niels Agerlund Christensen, Morten Boberg Larsen
  • Patent number: 8662887
    Abstract: A NOx suppression apparatus is configured for use with a burner that injects fuel into a stream of process air flowing into and through a rotary kiln. The apparatus comprises a premix injection system that forms a premix of fuel gas and air, and injects the premix into the stream of process air upstream of the burner port. This enables premix products of combustion to suppress the production of NOx by vitiating a combustion air portion of the process air before the combustion air portion combusts with fuel injected from the burner port.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: March 4, 2014
    Assignee: Fives North American Combustion, Inc.
    Inventors: Bruce E. Cain, Thomas F. Robertson, John J. Nowakowski
  • Patent number: 8647430
    Abstract: The invention relates to a process for manufacturing cement clinker in a plant having a cyclone preheater, a precalcination reactor, a rotary furnace and a clinker cooler. In the process, the flue gases from the furnace are conducted to the precalcination reactor, or even to the cyclone preheater. According to the invention, the precalcination reactor is fed with an oxygen-rich gas, the nitrogen content of which is less than 30%, constituting the sole oxygen source for said reactor, and a portion leaving the cyclone preheater is recycled into the plant so as to obtain a suitable flux necessary for suspending matter in said preheater, while the other portion, rich in carbon dioxide, is adapted for the purpose of a treatment for limiting the amount of carbon dioxide discharged into the atmosphere, such as particularly sequestration.
    Type: Grant
    Filed: July 17, 2009
    Date of Patent: February 11, 2014
    Assignee: Fives FCB
    Inventors: Alain Cordonnier, Sébastien Devroe
  • Publication number: 20140023978
    Abstract: This drive device (6) is capable of transmitting a drive torque to the combustion chamber of a rotary kiln. The drive device (6) includes a drive ring gear (8) adapted so as to be attached to the combustion chamber. At least a portion of the drive ring gear (8) is fabricated out of cast iron.
    Type: Application
    Filed: March 14, 2013
    Publication date: January 23, 2014
    Applicant: FERRY CAPITAIN
    Inventor: Jean-Baptiste PRUNIER
  • Publication number: 20130203006
    Abstract: The present disclosure refers to an arrangement for the aerobic heating of pourable solid matter, comprising: a rotatable rotary drum for receiving the pourable solid matter, at least one front wall which is non-rotatably arranged relative to the rotary drum for closing a front side of the rotary drum, and a sealing arrangement between the rotary drum and the front wall, the sealing arrangement comprising a cylindrical sealing surface coaxial to the rotary drum and a sealing element sliding on the cylindrical sealing surface.
    Type: Application
    Filed: February 6, 2013
    Publication date: August 8, 2013
    Applicant: Rohren- und Pumpenwerk Bauer GmbH
    Inventor: Röhren- und Pumpenwerk Bauer GmbH
  • Patent number: 8500444
    Abstract: A rotary kiln includes a cylindrical shell that rotates about its own axis and that has a heat treatment chamber provided radially inward of the shell. In the rotary kiln, a heat treatment is performed on a process material in the heat treatment chamber to manufacture a battery material. The shell is made of a carbon material. Since the shell is made of a carbon material, the rotary kiln can suppress contamination of metal scale, which adversely affects the battery material, into the battery material.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: August 6, 2013
    Assignee: Takasago Industry Co., Ltd.
    Inventors: Hiroki Kumagai, Fumihiko Kato, Sadahiko Kawasaki
  • Publication number: 20130040257
    Abstract: A method for manufacturing cement by which method cement raw materials, such as limestone and clay, are comminuted in a comminution apparatus for subsequently being heated and burned into cement clinker. The cement clinker is then cooled and directed to a comminution apparatus for comminution to cement. For some embodiments of the method, the cement raw materials and cement clinker may undergo comminution in one and the same comminution apparatus.
    Type: Application
    Filed: October 6, 2010
    Publication date: February 14, 2013
    Applicant: FLSMIDTH A/S
    Inventor: Thoger Kobke Christiansen
  • Patent number: 8342493
    Abstract: A turning roll system for rotating a cylindrical workpiece about a workpiece axis comprises a pair of idler rollers cooperating with a pair of drive rollers to support the workpiece. To oppose axial drift of the workpiece, each idler roller is rotatably journalled on a respective idler axle such that the axis of rotation of the idler roller is oriented obliquely relative to a pivot axis of the idler axle. The idler axles may be pivoted about their respective pivot axes to adjust the orientation of the idler roller axes relative to the workpiece to introduce an axially directed force component acting on the workpiece to counter axial drift. Pivoting of the idler axles may be automatically controlled based on a signal generated by a drift sensor arranged to detect axial drift of the workpiece.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: January 1, 2013
    Assignee: Koike Aronson, Inc.
    Inventor: Robert T. Flaig
  • Publication number: 20120145042
    Abstract: Disclosed is a process for the calcining and manufacturing of synthetic pozzolan with desirable color properties. Feed material is dried, crushed, and preheated in a drier crusher. The dry, crushed material is collected and fed to a calciner where it is heated to become a synthetic pozzolan. The synthetic pozzolan is then fed to a cooler where it is maintained for a least a portion of the cooling step in a reducing atmosphere.
    Type: Application
    Filed: December 13, 2010
    Publication date: June 14, 2012
    Inventors: James Ballan, Ove Lars Jepsen, Peter Paone, John S. Salmento
  • Patent number: 8187374
    Abstract: The invention relates to a process for manufacturing clinker from a raw mix, implementing the following: preheating of the raw mix by combustion flue gases; precalcination of the raw mix; and calcination of the precalcined raw mix in a rotary kiln, in which process the precalcination and the calcination in the rotary kiln produce combustion flue gases that contain CO2, in which the combustion flue gases created by the precalcination undergo a CO2-removal treatment without said flue gases mixing with the combustion flue gases created by the calcination in the rotary kiln.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: May 29, 2012
    Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Erwin Penfornis, Guillaume De Smedt
  • Publication number: 20120122047
    Abstract: A method of heating a charge material by controlling heat flux in a tilt rotary furnace is disclosed. Combustion by the burner forms a heat release profile including a high heat flux region. The positioning of the high heat flux region is controllable by providing a controlled amount of secondary or staged oxidant. The burner is configured and controlled to position a region of high heat flux at a position corresponding to an area requiring greater heating, such as the area of maximum charge depth in the furnace to provide substantially uniform melting and heat distribution.
    Type: Application
    Filed: November 11, 2010
    Publication date: May 17, 2012
    Applicant: Air Products and Chemicals, Inc.
    Inventors: Jin Cao, Xiaoyi He, Aleksandar Georgi Slavejkov
  • Publication number: 20120094243
    Abstract: This invention relates to a rotary furnace that is designed for the heat treatment of solids comprising at least one rotary tube (1) into which the solids are introduced and a heating means outside of the rotary tube that makes it possible to conduct the heat treatment, characterized in that the rotary tube comprises—on its inside surface, in contact with the feedstock to be treated—at least 1 heating blade (30, 31, 32, 33, 34, 35, 36, 37, 38). The invention also relates to the use of this furnace for conducting the roasting of solid biomass.
    Type: Application
    Filed: March 10, 2010
    Publication date: April 19, 2012
    Inventors: Elena Sanz Garcia, Mathieu Rollan
  • Publication number: 20120070793
    Abstract: Self supporting kiln insulation device comprising an outer layer having an inside surface, at least two insulation modules, and, a stationary support structure. The insulation modules do not touch the kiln and heat dams are located adjacent to and touching the kiln, and are spaced at random spacing along the kiln.
    Type: Application
    Filed: November 2, 2011
    Publication date: March 22, 2012
    Inventor: Mark A. Thompson
  • Publication number: 20120009530
    Abstract: A method for burning raw materials by which method the raw material and a secondary fuel are separately introduced to one and the same rotary kiln in which the raw material as well as the secondary fuel are heated by gases formed by burning of a primary fuel in the rotary kiln so that the secondary fuel is converted to gases and solid matter in the form of combustion residues such as ashes and coke. The secondary fuel during the process of conversion to gases and solid matter is kept separate from the introduced raw material, which may ensure that the secondary fuel and hence the locally reducing zones and major areas with reducing conditions are brought into minimum contact with the raw material.
    Type: Application
    Filed: September 2, 2009
    Publication date: January 12, 2012
    Applicant: FLSMIDTH A/S
    Inventors: Lars Skaarup Jensen, Niels Agerlund Christensen, Morten Boberg Larsen
  • Patent number: 8083520
    Abstract: A reactor for direct utilization of external radiation heat includes a containment can having a longitudinal axis, an external driving mechanism for controllable rotating the containment can and a cavity having a cylindrical shape. The cavity is partially lined with an insulation layer and disposed in the containment can. The cavity has a gas inlet, a gas outlet and an aperture for allowing to insert the external radiation heat into the cavity. A feeder mechanism is moveable along the longitudinal axis into and out of the cavity for supplying the material subject to the thermal or thermo-chemical material process. The gas outlet is formed as a ring channel tube having an inner and an outer surface, wherein the feeder mechanism is at least partially hosted within a tube cavity defined by the inner surface. Cooling means are associated with the inner and/or outer surface.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: December 27, 2011
    Assignee: Paul Scherrer Institut
    Inventors: Reto Mueller, Robert Palumbo, Peter Haeberling
  • Patent number: 7947242
    Abstract: A cement kiln chlorine/sulfur bypass system wherein the equipment cost is suppressed and the sulfur included in a combustion gas bled from a cement kiln is separated and effectively utilized. The cement kiln chlorine/sulfur bypass system comprises an air bleed means for bleeding a kiln exhaust gas passage, which runs from the end of the cement kiln to a bottom cyclone, of a part of the combustion gas, a separating means for separating dust in the gas bled by the air bleed means into coarse particles and fine particles, and a wet dust collector for collecting dust from the gas containing the fine particles separated by the separating means. The separating means is preferably a classifier in which the cut size is changeable. The wet dust collector is preferably a mixing scrubber.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: May 24, 2011
    Assignee: Taiheiyo Cement Corporation
    Inventors: Shinichiro Saito, Naoki Ueno, Hiroshi Harada, Soichiro Okamura, Takayuki Suzuki
  • Patent number: 7814867
    Abstract: The present invention is an apparatus and method for producing a steam and CO2 mixture, as a super heated dry steam mixture. The apparatus includes a rotatable vessel having a combustion section and a steam producing section. There may also be a dry solid removal, a steam production and solid scrubbing vertical vessel, and a heat exchanger. The vessel is partially filled with spherical bodies, and the sections are partially separated by a partition. A discharge section is located at an end of the steam producing section. A homogenizing section has at least one partition wall guiding flow of gases. The process for producing the steam mixture includes mixing a low quality fuel with an oxidation gas, combusting in a rotating drum filled with spherical bodies, and mixing low quality water with a controlled temperature to generate steam. All liquids convert to gas so that there is no liquid discharge.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: October 19, 2010
    Assignee: Ex-Tar Technologies, Inc.
    Inventor: Maoz Betzer Tsilevich
  • Publication number: 20100112505
    Abstract: The invention relates to a method and apparatus for processing oil drilling waste. According to the invention, oil drilling waste of one or more types is selected, and is introduced from the feeding tanks into a rotating kiln; and in the kiln, the oil drilling waste is processed at a temperature of 110 to 13500° C. to form granules having a compact-coated surface.
    Type: Application
    Filed: September 25, 2007
    Publication date: May 6, 2010
    Applicant: Migliore Oy
    Inventor: Antero Pulkkanen
  • Patent number: 7695276
    Abstract: The present invention relates to a furnace (10), its method of operation and control. The invention overcomes problems associated with existing furnaces by improving the recovery rate of waste metal. In a preferred embodiment the furnace (10) comprises a cylindrical body of constant internal diameter. The furnace body (12) is mounted on a frame (15) pivoted to a ground members (16a and 16b), the furnace body (12) is adapted to be reclined or inclined or at various angles (? and ?); a burner (30) to heat the furnace, and a door (19a, 19b) for sealing an open end (14). As the internal walls of the furnace body (12) are of a constant diameter, it is no longer necessary to incline the furnace (10) to such a degree in order to pour molten metal, because there is no narrow neck (which previously acted like a weir). In a preferred embodiment combustion air is routed through the door hinge to the burner (30).
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: April 13, 2010
    Assignee: Platinum Controls Limited
    Inventor: Thomas Hudson Evans
  • Publication number: 20100000119
    Abstract: To provide a cement burning apparatus and a method of drying high-water-content organic waste capable of reducing a danger of explosion at a facility for drying; avoiding decreased value of dried sludge as a fuel: and more efficiently drying high-water-content organic waste. The cement burning apparatus 1 comprises a dryer 6 for drying high-water-content organic waste of which water content is 40 mass percent or more, in which combustion gas extracted from outlet portions or ceiling portions of preheater cyclones 3A to 3D of a cement kiln 2 is fed to the dryer 6. As the dryer 6, a grinding-type flash dryer, which directly contacts the combustion gas G with the high-water-content organic waste W while grinding it, can be used.
    Type: Application
    Filed: June 26, 2007
    Publication date: January 7, 2010
    Inventors: Naoki Ueno, Yoshihito Izawa, Hiroyuki Takano, Hirofumi Mori
  • Publication number: 20090283015
    Abstract: In a method for utilizing alternative fuels in the production of clinker or cement the alternative fuels are employed in reactors (4) for the preheating and/or precalcining of raw meal in a combustion device (17) separate from the burners (12) of the respective reactor (4) and are at least partially burnt whereupon an, if necessary, complete combustion is carried out inside the reactors (4) with the combustion oxygen fed to the burner (12) of the reactor (4) in excess of stoichiometry. The device for utilizing alternative fuels in the production of clinker or cement having a clinker kiln (1) and a reactor (4) with burners (12) for preheating and calcining of raw meal and having at least one duct (18) for combustion air or -oxygen respectively is characterized in that a separate combustion device (17) having a conveyor for alternative fuels such as, for instance, a pusher or a screw conveyor (16) is provided and opens inside the respective reactor (4).
    Type: Application
    Filed: August 11, 2006
    Publication date: November 19, 2009
    Inventors: Urs Gasser, Edilberto L. Tadulan
  • Patent number: 7608804
    Abstract: The present invention relates to a tilting heating apparatus in which a heating container is not lowered below the level of a tilting base when the heating container is tilted with its opening faced upward and an on-the-spot heat treatment system for a heating object.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: October 27, 2009
    Assignee: Astencook Corporation
    Inventor: Shigehiro Tanaka
  • Publication number: 20090208891
    Abstract: Self supporting kiln insulation device comprising an outer layer having an inside surface, at least two insulation modules, at least two heat dams, and, a stationary support structure. The insulation modules do not touch the kiln and heat dams are located adjacent to and touching the kiln, and are spaced at random and at predetermined distances apart from each other.
    Type: Application
    Filed: February 2, 2009
    Publication date: August 20, 2009
    Inventor: Mark A. Thompson
  • Publication number: 20090152368
    Abstract: The invention relates to a method for introducing a flowable and foamable reaction mixture from the top into a ballast body having sleepers embedded therein, in which method said mixture is introduced into the ballast body laterally of the sleepers, notably preferably depending on the height of the ballast body at the point of application, and in a quantity that is all the larger the more upwards in the ballast body the application point is situated, wherein the mixture is adjusted in such a way that the foam formation process will begin only when the front of the mixture flowing downwards inside the ballast body has reached the bottom side or the region in the vicinity thereof of the ballast body so that the foam formation is carried out within the ballast body from the bottom towards the top.
    Type: Application
    Filed: February 12, 2007
    Publication date: June 18, 2009
    Applicant: MSB-MANAGEMENT GMBH
    Inventor: Tim Frenzel
  • Publication number: 20080305448
    Abstract: A safety door for covering openings in a rotary kiln during maintenance operations on the rotary kiln. The door is affixed to the exterior surface of the rotary kiln and includes a hatch pivotally secured at one side edge thereof by a pivot rod to a frame. A plurality of tension coil springs are disposed on the pivot rod and continuously bias the hatch toward the opening with a force of approximately 400 pounds.
    Type: Application
    Filed: June 11, 2007
    Publication date: December 11, 2008
    Inventors: Derek W. Couse, Manuel Sandoval
  • Patent number: 7452203
    Abstract: In a kiln whose interior is heated by combustion with oxidant having a higher oxygen content than air, streams of staging oxidant are fed into the space between the combustion zone and the inner surface of the kiln, and the stoichiometric ratios and amounts of oxygen in the combustion zone and in the overall operation of the kiln are adjusted to provide control or reduction of NOx formation while maintaining or increasing productivity of the kiln.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: November 18, 2008
    Assignee: Praxair Technology, Inc.
    Inventors: Stefan Laux, Lawrence E. Bool, III
  • Patent number: 7033167
    Abstract: The invention relates to an apparatus for cleaning and/or decontaminating polyester, in particular polyethylene terephthalate (PET). The apparatus has an at least partially heated rotary tubular furnace to be fed with a mixture of polyester and an alkaline material and is for carrying out a saponification reaction in the mixture. The invention is distinguished in that within the rotary tubular furnace a weir is disposed which at least partly closes the interior of the rotary tubular furnace.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: April 25, 2006
    Assignee: Cleanaway Deutschland AG & Co. KG
    Inventors: Achim Ebel, Carlos Dario Gutierrez
  • Patent number: 7029505
    Abstract: The single substrate thermal processing apparatus (2) includes a process chamber (5) arranged to accommodate a target substrate (W) and provided with a showerhead (10) disposed on its ceiling. A support member (28) is disposed to support the target substrate (W) so as for it to face the showerhead (10), when the target substrate (W) is subjected to a semiconductor process. A heating lamp (30) is disposed below the support member (28), for radiating light to heat the target substrate (W). The support member (28) and heating lamp (30) are moved up and down together relative to the showerhead (10) by an elevator mechanism (20). The elevator mechanism (20) sets different distances between the showerhead (30) and heating lamp (10), in accordance with the different process temperatures, thereby causing temperature change of the bottom surface of the showerhead (10) to fall in a predetermined range.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: April 18, 2006
    Assignee: Tokyo Electron Limited
    Inventors: Lin Sha, Shou-Qian Shao, Yicheng Li
  • Patent number: 6883249
    Abstract: An insulating flight for a dryer incorporates inner and outer plates with insulation between them. The concave surfaces of the inner and outer plates provide a space for the insulation and allow for thermal expansion without stressing the welds between the inner and outer plates.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: April 26, 2005
    Assignee: Internetek, Inc.
    Inventor: Gary Catlett
  • Patent number: 6884064
    Abstract: A burner protection shield is provided at a distance and in an area below a burner lance that is used in a rotary kiln for the production of cement clinker. Such a mechanism enhances the useful lifetime of the burner lance.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: April 26, 2005
    Assignee: KHD Humboldt Wedag AG
    Inventors: Richard Cusick, John Schureck
  • Patent number: 6860735
    Abstract: Disclosed is a rotary kiln that can be used efficiently in drying, dry distillation and incineration of various garbage and industrial wastes. The rotary kiln comprises a cylindrical furnace body (10) disposed to incline at a small angle from the horizontal plane, a cylindrical contact heater (20) supported in the furnace body (10), a rotation drive means (30) that drives the furnace body (10) and the contact heater (20) to rotate, a waste charging port (61), a processed material discharging port (18), a combustion gas supply means (40) that supplies a combustion gas into the cylindrical contact heater (20) and a combustion gas introducing means (50) that guides the combustion gas through the contact heater (20) from a distal end to a proximate end thereof, and then guides the combustion gas through a space (S) between the contact heater (20) and the furnace body (10) from the proximate end to the distal end, thereby to charge.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: March 1, 2005
    Assignee: S. Mac Co., Ltd.
    Inventor: Masanobu Shimono
  • Patent number: 6825339
    Abstract: The present invention relates to an apparatus for preparing polynucleotides on a solid support in a reactor comprising a column containing an immobilized solid support that is functionalized for polynucleotide synthesis. The solid support can be porous, and can be functionalized with a nucleoside or with a universal synthesis of polynucleotides.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: November 30, 2004
    Assignee: Proligo, LLC
    Inventors: François Chatelain, Viktor Kumarev
  • Publication number: 20040096796
    Abstract: The invention relates to a device for purifying and/or decontaminating polyester, in particular polyethylene terephthalate (PET). Said device has a rotary kiln (1), which is at least partially heated and fed with a mixture of polyester and an alkaline material, for carrying out a saponification reaction in the mixture. The invention is characterised in that the rotary kiln (1) contains a weir-type element (22), which closes at least part of the interior (5) of said kiln (1).
    Type: Application
    Filed: December 8, 2003
    Publication date: May 20, 2004
    Inventors: Achim Ebel, Carlos Dario Gutierrez
  • Patent number: 6705858
    Abstract: A rotary furnace includes a drum and a frame supporting the drum for rotation about a nominally horizontal rotational axis. The frame and the drum are supported for pivotal movement about a horizontal pivotal axis. A door supported on the frame normally closes the front end of the drum and is selectively pivotal to an open position to facilitate charging of the drum. The door includes a pouring door which is openable to facilitate discharge of molten material from the drum.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: March 16, 2004
    Assignee: Imco Recycling, Inc.
    Inventors: Richard S. Slade, Robert J. Garrett, David P. LaVelle, Lee Newton, Joseph Wojciechowski
  • Patent number: 6676407
    Abstract: A warp resistant fuel feed door assembly for use in injecting supplemental fuel into a high temperature combustion chamber such as a rotating cement kiln without substantial loss of heat or combustion gases. The apparatus, which is positioned on the exterior side of a fuel passage transecting the wall of a rotating kiln, opens to receive fuel and then seals during the balance of the rotation of the kiln. Warping, bearing fracture, shaft distortion and jamming due to exposure to extreme heat and cooling are minimized by the sectional construction of the doors. The door includes a plate positioned over the mouth of the passage, a plurality of support arms attached to the plate and a hinge shaft attached to the arms. Stresses on the door structure from inconsistent expansion of the plate are reduced due to symmetrically spaced oblong and oversized bolt attachment bores in the support arms. Synchronous opening of the feed doors is achieved by levered rotation of the hinge shafts by an electric motor.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: January 13, 2004
    Inventor: Thomas R. Largent
  • Publication number: 20030211438
    Abstract: A rotary drum heater for mixing asphalt with a hot gas introduced into the drum by gas burners is disclosed. The drum has an inlet opening for material to enter the drum to be processed and an outlet opening for material to exit. The hot gas is blown into the interior of the drum and is diverted by a hot gas conduit segment that is designed to gently heat the asphalt.
    Type: Application
    Filed: July 16, 2002
    Publication date: November 13, 2003
    Inventor: Dieter Marquardt
  • Publication number: 20030165788
    Abstract: A grizzly bar device for a rotating kiln having an annular array of bars having at least two adjacent bars, wherein the thickness the bars is reduced in lateral and radial directions, and gap between the adjacent bars increases in width as the bars extend laterally from front to back of the bar and extend radially inward of the kiln. Another taper on a front face of the bars provides a cutting corner on each bar.
    Type: Application
    Filed: February 27, 2003
    Publication date: September 4, 2003
    Inventor: Royce G. McCarty
  • Publication number: 20030134249
    Abstract: A rotary furnace includes a drum and a frame supporting the frame for rotation about a nominally horizontal rotational axis. The frame and the drum are supported for pivotal movement about a horizontal pivotal axis. A door supported on the frame normally closes the front end of the drum and is selectively pivotal to an open position to facilitate charging of the drum. The door includes a pouring door which is openable to facilitate discharge of molten material from the drum.
    Type: Application
    Filed: March 5, 2003
    Publication date: July 17, 2003
    Inventors: Richard S. Slade, Robert J. Garrett, David P. LaVelle, Lee Newton, Joseph Wojciechowski
  • Patent number: 6558157
    Abstract: A rotary drum for carrying out chemical processes at elevated temperatures which includes a rolling body arrangement for cleaning the interior of the drum, a stationary feed end for the material to be treated, a mounting device for the rolling body arrangement on the feed end of the rotary drum, and a rotary bearing that allows the rolling body to roll on the inner side of the rotary drum wall and which connects the rolling body to the mounting device. The rotary drum further including an oblong scraping device which is arranged between the mounting device and said rotary bearing. Since the scraping device is mounted on the mounting device, it is able to carry out a pendulum motion in at least one direction, but unable to turn about itself, and the end of the scraping device on the side of the rotary bearing is connected to the rotary bearing in such a way that it is able to carry out a pendulum motion in at least one direction.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: May 6, 2003
    Assignee: Veba Oel Technologie und Automatisierung GmbH
    Inventors: Peter H. Raichle, Wolfgang Mai, Harry F. Werner, Gaston F. V. Vangilbergen
  • Patent number: 6530779
    Abstract: A rotary furnace includes a drum and a frame supporting the frame for rotation about a nominally horizontal rotational axis. The frame and the drum are supported for pivotal movement about a horizontal pivotal axis. A door supported on the frame normally closes the front end of the drum and is selectively pivotal to an open position to facilitate charging of the drum. The door includes a pouring door which is openable to facilitate discharge of molten material from the drum.
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: March 11, 2003
    Assignee: Imco Recycling, Inc.
    Inventors: Richard S. Slade, Robert J. Garrett, David P. LaVelle, Lee Newton, Joseph Wojciechowski
  • Publication number: 20030030194
    Abstract: The powder homogenizing apparatus of the invention comprises a cylindrical shell with a circular section and a substantially horizontal axis, an assembly of cylindrical drums disposed inside the shell and comprising an inner drum and an outer drum, the external face of the cylindrical wall of said outer drum being overlaid with blades, which drum assembly can homogenize the powder contained in the annular space formed between the outer drum and the shell, a space of revolution being formed between said inner and outer drums, and a shaft on which said cylindrical drum assembly is mounted in integral manner, said shaft being hollow and connected outside the shell to a cold air supply system and also connected to an air exhaust system outside the shell; drive means for rotating said shaft are also provided.
    Type: Application
    Filed: July 19, 2002
    Publication date: February 13, 2003
    Applicant: Compagnie Generale Des Matieres Nucleaires
    Inventors: Gerard Bertolotti, Christian Orange
  • Patent number: 6474985
    Abstract: A rotary kiln for pyroprocessing particulate material includes a cylindrical kiln shell supported for rotation about a longitudinal central axis. The kiln has a plurality of circumferentially spaced peripheral openings provided in the kiln shell near its exit end for discharging pyroprocessed particulate material therethrough. A raised grate disposed over each discharge opening has a generally convex geometric profile that projects into the interior of said kiln shell.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: November 5, 2002
    Assignee: Metso Minerals Industries, Inc.
    Inventors: Samuel A. Miller, Thomas H. Luepke, Jr.
  • Patent number: 6467190
    Abstract: A duct system includes an upper duct that supplies heated air to an upper plenum and a lower duct that supplies heated air to a lower plenum, and the upper and lower plenums provide the heated air to a kiln chamber. An intermediate plenum is between the upper and lower plenums and has outlets through which heated air supplied to the upper and lower plenums is discharged. A plurality of circulation passages extend generally laterally through the intermediate plenum. Fans positioned in the circulation passages circulate heated air that is external to the plenums. The outlets are nozzles defining discharge axes that are respectively directed generally parallel to, yet slightly toward, the rotational axes of the fans. Tips of the fans' blades extend into boundary layers adjacent the interior surfaces of the circulation passages. The fans operate in first and second modes to respectively force flow in opposite first and second directions.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: October 22, 2002
    Inventors: Robert T. Nagel, John Craig Holbert
  • Patent number: 6468074
    Abstract: A rotary kiln for calcination of light aggregate cement comprises a calcination kiln body, a heavy-oil combustion device, and a cooling device, wherein the calcination kiln body is formed in a U-turn for saving construction site and is composed of a feeding entrance at its upmost end, a product exit at the lowest end, and a plurality of revolving segments varied in caliber by segment so as to raise the calcination efficiency, save construction expenditure, and meet environment requirements.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: October 22, 2002
    Inventor: Chieh-Yuan Wu
  • Patent number: 6447289
    Abstract: A support stand for supporting an elongated rotary drum for rotation about a longitudinally extending drum axis includes a lower portion extending upwardly from a base to a tilted top extending in a plane of tilt; a correspondingly tilted upper portion mounted atop the lower portion, and a carrying roller rotatably mounted on the upper portion for rotation about a roller axis while a riding ring extending coaxially around the drum bears against and rides in rolling contact on the roller. The upper portion is rotatably positionable relative to the lower portion about a skew axis perpendicularly intersecting the plane of tilt at a fixed point. The skew axis substantially radially intersect the drum axis. As well, the skew axis substantially radially intersects the roller axis. A mechanism for adjusting the amount of skew and an indicator for displaying the amount of skew are also disclosed.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: September 10, 2002
    Inventors: Jeffery Franklin Boyne, Donavan Roy Larsen