Mechanical Conveying Means Patents (Class 110/228)
  • Patent number: 9903654
    Abstract: Apparatus for pre-heating and conveying a metal charge to a container of a melting plant, comprising at least a conveyor channel along which said metal charge is able to advance so as to be delivered to the container, and in which above said conveyor channel at least a hood is disposed which defines a tunnel inside which at least part of the fumes exiting from said container are able to advance. At least a zone of the hood comprises an expansion chamber located above at least a portion of said metal charge, and able to expand and keep said fumes inside it for a minimum desired time of at least 1.5 seconds before they go into contact with the metal charge.
    Type: Grant
    Filed: April 26, 2016
    Date of Patent: February 27, 2018
    Assignee: DANIELI & C. OFFICINE MECCANICHE SPA
    Inventors: Thomas Narholz, Bernard Villemin
  • Patent number: 9878932
    Abstract: A submerged combustion melter 10 is arranged with a vertical melting chamber 11, which may be cylindrical, and at least five submerged combustion burners 21-26 in the bottom base 13, the burners so spaced apart from each other and from the walls and angled from the vertical that in use a toroidal flow pattern can be achieved, providing intensive mixing. The claims also pertain to a method of melting a vitrifiable material from solid batch by submerged combustion melting.
    Type: Grant
    Filed: July 30, 2014
    Date of Patent: January 30, 2018
    Inventors: Jerry Demott, Bostjan Marolt, Randy Etzkorn, David Ducarme
  • Patent number: 9494313
    Abstract: Provided are a device and a method for manufacturing a semi-carbonized fuel of a biomass that does not require an external heat source and is capable of suppressing adhesion of tar, condensed water, or the like to a pipe. The device includes a drying device for heating and drying a biomass, a pyrolysis device for decomposing the dried biomass, and a combustion device for supplying heat to the drying device and the pyrolysis device. The pyrolysis device is supplied with a part of a combustion exhaust gas generated in the combustion device, directly mixes the supplied combustion exhaust gas and the biomass to heat and pyrolytically decompose the biomass, and supplies a mixed gas of a generated pyrolysis gas and the combustion exhaust gas to the combustion device. The combustion device is supplied with an air for combustion, combust the supplied mixed gas, and generate the combustion exhaust gas.
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: November 15, 2016
    Assignee: Mitsubishi Hitachi Power Systems, Ltd.
    Inventors: Hirofumi Okazaki, Akihito Orii, Tetsuma Tatsumi
  • Patent number: 9316444
    Abstract: Apparatus for continuously conveying and pre-heating a metal charge inside a container of a melting plant, comprising at least a conveyor channel, having walls to convey the metal charge, and at least a hood defining a conveyor tunnel and/or an expansion chamber. The hood is disposed above the conveyor channel for the transit of at least part of the fumes exiting from the container, and the conveyor channel cooperates with apertures to discharge the fumes. The apertures cooperate with at least a fume diverting channel defining at least a first expansion compartment, located substantially vertical or sub-vertical, connected both to the apertures and also to at least a channel to take in the fumes.
    Type: Grant
    Filed: December 10, 2010
    Date of Patent: April 19, 2016
    Assignee: Danieli & C. Officine Meccaniche SPA
    Inventors: Thomas Narholz, Bernard Villemin
  • Publication number: 20150107497
    Abstract: A system and for incinerating solid waste material that generates energy and minimal emissions. The incinerator system of the present disclosure is modular and may be configured to fit within a desired location. The system accepts raw solid material and processes, dries and ignites the waste material in an, optionally automated process.
    Type: Application
    Filed: October 21, 2014
    Publication date: April 23, 2015
    Inventor: Anthony Hughey
  • Patent number: 8776700
    Abstract: A system is described for the pyrolysation and gasification of organic substances, in particular biomasses, comprising in cascade at least one evaporation module, at least one pyrolysis reactor and at least one gassing device, such evaporation module being supplied with the organic substance, to be dried and then be transferred through first supplying means in such pyrolysis reactor to be subjected to a pyrolysis process for producing at least one pyrolysis fuel syngas and remaining organic products, the remaining organic products being then transferred through second supplying means to such gassing device to produce at least one gasification fuel syngas, further comprising first channelling means for such pyrolysis fuel syngas and such gasification fuel syngas from such pyrolysis reactor to at least one energy user, second channelling means of burnt exhaust gases produced by such energy user towards such evaporation module, and third channelling means of such gasification fuel syngas from such gassing device
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: July 15, 2014
    Inventor: Elio Faussone
  • Patent number: 8701573
    Abstract: A two stage refuse gasification combustion system for processing refuse is disclosed. The system may contain features such as an advancer, a first and second gasifier, a drier, a gas regulator, and a post combustor. Additionally, methods for regulating gas and advancing refuse through a two stage refuse gasification combustion system are disclosed.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: April 22, 2014
    Assignee: Convanta Energy Corporation
    Inventors: Ron Broglio, Hanwei Zhang, Robert Lees Barker, Stephen Paul Goff
  • Publication number: 20130305972
    Abstract: An apparatus for the simultaneous drying and transport of low-rank coal is described. The apparatus has a first pipe having an inner wall surface surroundingly defining a first flow channel and an outer wall surface; a low-rank coal supply system to supply particulate low-rank coal to an inlet of the first flow channel; a transport gas supply to supply transport gas to an inlet of the first flow channel; a heating apparatus to apply heat to an outer wall surface of the first pipe along at least part of the length thereof for example in the form of a drying fluid supply to supply a drying fluid, configured such that a drying fluid is brought into contact with the outer wall surface of the first pipe along at least part of the length thereof. A system of design of thermal power plant incorporating such an apparatus is also described. A method for the simultaneous drying and transport of low-rank coal is also described. A system and method for supplying dried low-rank coal for combustion are also described.
    Type: Application
    Filed: November 25, 2011
    Publication date: November 21, 2013
    Applicant: DOOSAN POWER SYSTEMS UK LIMITED
    Inventors: Chao Hui Chen, Michael John Smith
  • Publication number: 20130247800
    Abstract: A method for drying solid fuels prior to injection and burning in solid fuel boilers is described. High moisture content solid fuels such as bark, sludge, wet coal, etc. must be dried before they can burn. Embodiments of the present invention incorporates a fuel delivery chute integrated with the boiler wall using a flow of combustion gasses and radiant heating to partially dry the solid fuel before it reaches the combustion zone of the boiler. The combustion gasses are drawn through the delivery chute by means of the flowing fuel and air jet inductors that then blows the combustion gasses back into the boiler. A refractory wall separates the fuel chute from the boiler proper, is heated by the combustion in the boiler, and radiates heat to the fuel falling through the fuel chute.
    Type: Application
    Filed: October 27, 2012
    Publication date: September 26, 2013
    Inventors: Daniel R. Higgins, Eugene Sullivan, Michael J. Kranda, David J. Knighten
  • Publication number: 20130186311
    Abstract: It is disclosed a two-section type waste incinerator, wherein secondary air supplying holes (27e) are provided on a front arch and a back arch of an incinerator body (27), and an ignition combustion-supporting hole (27f) is provided on the back arch of the incinerator body. Grate inside the incinerator body (27) is divided into two sections from a high point to a low point, i.e., an upper section and a lower section, the upper section is a pusher type section (6) and the lower section is a reverse pusher type section (7), and an independent primary air chamber (26) is provided under each section. All heads of the grate-pieces (3, 5) on the pusher type section (6) face toward a low point of the grate, and all heads of the grate-pieces (3, 5) on the reverse pusher type section (7) face toward a high point of the grate.
    Type: Application
    Filed: August 29, 2011
    Publication date: July 25, 2013
    Applicant: Chongqing University of Science & Technology
    Inventors: Shun-hong Lin, Ming Xu, Xiang Li, Xin-cai Zhu, Yi-ke Tang, Da-Zhi Xiao, You-qing Ding
  • Patent number: 8056255
    Abstract: A manure removal and drying system is used in an agricultural setting. The system includes a static pressure control system for regulating an amount of static pressure in a high pressure area of the agricultural setting, a variable speed loading system for varying a speed of operation of the system based on an amount of manure being removed and dried in the agricultural setting, a moisture sensing control system for detecting moisture from the manure in order to activate or deactivate the system, a selective capacity control system for selectively scaling a distance the manure in the agricultural setting is moved, and a friction reduction system for reducing the buildup of friction within the system caused by the movement of belts.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: November 15, 2011
    Assignee: CTB, Inc.
    Inventors: Nathaniel Lee Smith, Michael E. Krehl, Todd J. Martin
  • Patent number: 7735434
    Abstract: The inventive multi-level furnace comprises a furnace wall delimiting a cylindrical space having a vertical axis, a plurality of beds defining the levels inside said cylindrical space and at least one scraping arm which is provided with a wall scraper and associated with the bed in such a way that it is rotatable about the vertical axis of the furnace. During scraping arm rotation, said wall scraper defines a scraped area on the internal surface of the furnace wall which comprises a plurality of wall cavities forming a row of access openings in the scraped area, thereby making it possible to avoid the formation of a hardened crust adhered to the internal surface of the furnace wall and to develop braking shocks in the scraping arm.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: June 15, 2010
    Assignee: Paul Wurth S.A.
    Inventor: Emile Lonardi
  • Publication number: 20080308018
    Abstract: Disclosed herein is an apparatus for producing a refuse-derived solid fuel using combustible waste. The apparatus of the present invention includes a forming body (10) which has a hopper (10a) through which combustible waste is supplied into the forming body (10), with a drive unit (11) mounted to the forming body (10). The apparatus further includes a force-feed pipe (30) which is mounted to the forming body (10). Thermal oil flows through a space defined between layers constituting the force-feed pipe (30). A force-feed screw (50) is provided in the force-feed pipe (30). The apparatus further includes a siphon (70) which is provided in a space defined in the force-feed screw, so that thermal oil flows through the siphon (70), thus drying the combustible waste. The apparatus further includes a plurality of rod type heaters (90) which are disposed at the first end of the force-feed pipe (30), thus heating an outer surface of the compressed waste.
    Type: Application
    Filed: August 24, 2005
    Publication date: December 18, 2008
    Inventor: Song-Kwon Kang
  • Publication number: 20080257709
    Abstract: The method and equipment are intended for application in the chemical industry for destruction off solid substances, containing carbon and hydrocarbons. The invention guarantees absence of oxygen in the reactor and permits increased thermal efficiency. The closed forehearth is used to preheat every tyre that follows. The technologic comfort is due of use of spark proof material for the internal space of the forehearth; off the use water-cooled rollers (22) sealed in a casing (23), placed under the cylindrical reactor (1) and into a water pool (24), forming a back-pressure gate and of the use of three independent band conveyors, forming an discharge transport system.
    Type: Application
    Filed: December 28, 2004
    Publication date: October 23, 2008
    Applicant: "EKOPROCESS" AD
    Inventors: Dimitar Hristov Dimitrov, Hristo Dimitrov Hristov
  • Patent number: 6832564
    Abstract: A method of operating a multiple hearth furnace with a plurality of vertically aligned hearth floors includes feeding a first material onto the uppermost hearth floor and moving it over the hearth floor before it falls through a drop hole onto the next lower hearth floor. The first material is processed in this way from hearth floor to hearth floor to the lowermost hearth floor. A second material is fed onto one of the hearth floors to be mixed into the first material. This second material is moved separately from the first material in a separate annular zone of the hearth floor onto which it is fed before it is mixed into the first material, providing an efficient thermal preconditioning of the second material prior to mixing it with the first material without requiring any supplemental equipment.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: December 21, 2004
    Assignee: Paul Wurth S.A.
    Inventors: Patrick Hutmacher, Pascal Ferretti, Steve Arendt, Emile Lonardi
  • Patent number: 6698365
    Abstract: Material to be treated such as garbage is charged into a first rotary kiln 14 to be mainly dehydrated and charged into a second rotary kiln 18 to be carbonized. The first rotary kiln 14 has a first nozzle pipe 11 therein for spouting a first high temperature gas and the second rotary kiln 18 has a second nozzle pipe 15 for spouting a second high temperature gas, mainly high temperature superheated steam with a temperature higher than a temperature of the first high temperature gas. The carbonized material is discharged outside after a temperature thereof is lowered to prevent spontaneous combustion in an atmosphere. Thereby, it is able to provide an apparatus for thermal treatment using superheated steam which can be built relatively small and by which treatment time can be shortened, and further, the final carbonized material can be used as charcoal.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: March 2, 2004
    Assignee: S.T.M. Co., Ltd.
    Inventor: Katsumi Shibata
  • Patent number: 6418864
    Abstract: An incineration process and an incinerator using heat generated from combustion to bake and sublimate waste to produce gas as for burning waste is designed to use heat generated from the gas as burning chamber in the baking process and to allow waste to emit inflammable gas to be used as fuel in the gas burning chamber without using any other kind of fuel. The baked waste will be burned until it becomes charcoal in the burning chamber while its ash will be continuously removed and more waste continuously fed into the burning chamber. With this process, high temperature, low pollution, and budget savings will result.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: July 16, 2002
    Inventors: Manop Piyasil, Somjit Piyasil
  • Patent number: 6405662
    Abstract: A compression device for feeding a waste material to a reactor includes a waste material feed assembly having a hopper, a supply tube and a compression tube. Each of the supply and compression tubes includes feed-inlet and feed-outlet ends. A feed-discharge valve assembly is located between the feed-outlet end of the compression tube and the reactor. A feed auger-screw extends axially in the supply tube between the feed-inlet and feed-outlet ends thereof. A compression auger-screw extends axially in the compression tube between the feed-inlet and feed-outlet ends thereof. The compression tube is sloped downwardly towards the reactor to drain fluid from the waste material to the reactor and is oriented at generally right angle to the supply tube such that the feed-outlet end of the supply tube is adjacent to the feed-inlet end of the compression tube.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: June 18, 2002
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Paul M. Williams, Kenneth M. Faller, Edward J. Bauer
  • Patent number: 6386124
    Abstract: A waste treatment system for solidifying and increasing the speed at which manure would dry. The waste treatment system includes support members; and also includes an elongate tubular member being mounted upon the support members and having an inlet end and an outlet end and having a bore being disposed therethrough; and further includes a waste holding/compressing assembly being mounted to the elongate tubular member; and also includes an incineration/discharge assembly being disposed in and about the elongate tubular member for incinerating waste material.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: May 14, 2002
    Inventor: Dale T. Norquist
  • Patent number: 6276286
    Abstract: A compression device for feeding a waste material to a reactor includes a waste material feed assembly having a hopper, a supply tube and a compression tube. Each of the supply and compression tubes includes feed-inlet and feed-outlet ends. A feed-discharge valve assembly is located between the feed-outlet end of the compression tube and the reactor. A feed auger-screw extends axially in the supply tube between the feed-inlet and feed-outlet ends thereof. A compression auger-screw extends axially in the compression tube between the feed-inlet and feed-outlet ends thereof. The compression tube is sloped downwardly towards the reactor to drain fluid from the waste material to the reactor and is oriented at generally right angle to the supply tube such that the feed-outlet end of the supply tube is adjacent to the feed-inlet end of the compression tube.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: August 21, 2001
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Paul M. Williams, Kenneth M. Faller, Edward J. Bauer
  • Patent number: 6244198
    Abstract: The present invention refers to a method and an equipment for pyrolytic treatment of organic material comprising a supply storage receiving the organic material to be treated, a number of containers with meshlike walls, each to be charged with a batch of said organic material, a horizontal reactor with a charge gate in one end and a discharge gate in the opposite end, the interior of the reactor being divided by means of internal gates into at least a heating chamber, a pyrolysis chamber, and a cooling chamber, as well as a recovery storage for a solid pyrolytic residue of the organic material, i.e. the pyrolytic coke, the pyrolysis chamber being provided with an outlet pipe for generated pyrolytic gas terminating in a fractionating condenser, said condenser being provided with an outlet for each liquid fraction and an outlet pipe for uncondensed pure pyrolytic gas, which outlet pipe terminates in a gas tank.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: June 12, 2001
    Assignee: BCDE Group Waste Management Ltd., Oy
    Inventor: Hannu Lauri Suominen
  • Patent number: 6202577
    Abstract: A municipal or like refuse, from which large articles of metals have been removed, is mixed with an alkaline substance like limestone preferably in a triple screw mixer, and then advanced along the pyrolysis path in which the refuse mixture is subjected to heat from combustion gases from an incineration chamber therebelow. A portion of the pyrolyzed product is recycled to the upstream side of that path and the remainder of the pyrolyzed product is scrubbed with an aqueous medium, e.g. water and/or aqueous acetic acid and the washed pyrolyzed product is then incinerated to produce the combustion gas.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: March 20, 2001
    Inventors: Anatoly Boguslavsky, Yuriy Rabiner
  • Patent number: 6164220
    Abstract: A device for combustion of granular material, for example wood flour pellets, chippings and the like, comprises a rotary solid fuel burner (1), air intake to the bumer, at least one conduit (18) for the supply of fuel and outlet (3) for combustion gases to a boiler part for heat transfer to water-cooled surfaces, for example. The rotary solid fuel burner is formed as a vessel with a rear wall, said outlet (3) for combustion gases and a jacket part between the rear wall and the outlet. A fuel feed pipe (18), which forms part of a fuel feed conduit, extends through the rear end wall, and an air admission pipe (19) surrounds the central fuel feed pipe at a distance from this, so that a space (20) which is ring-shaped in section is formed between the central fuel feed pipe (18) and the air admission pipe (19).
    Type: Grant
    Filed: September 16, 1999
    Date of Patent: December 26, 2000
    Assignee: Swedish Bioburner System Aktiebolag
    Inventor: Jan Magnusson
  • Patent number: 6135035
    Abstract: A method of and apparatus for the combustion of animal wastes to avoid release of objectionable odors and to obtain useful products from the animal wastes involving the drying of the animal waste in a primary heat exchange dryer, mixing the dried animal waste material with a combustible fuel and moving the mix of dried waste and combustible fuel to a burner assembly of a furnace for burning, the exhaust from the primary heat exchange dryer being collected so that gases in the exhaust are used as combustion air for the burner assembly and with exhaust from the burner assembly housing being separated into fly ash and acceptably clean exhaust.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: October 24, 2000
    Inventor: Tommy D. Masek
  • Patent number: 5967062
    Abstract: An apparatus burns tires in a horizontally rotating combuster. The tires are loaded into a rotating combustion chamber through a traveling air lock and burned until they are reduced to ash. Combustion is enhanced by tumbling the burning tires in the rotating chamber while adding preheated draft air. The intake draft air is controlled using thermal expansion of the rotary combustion chamber to activate the draft control valve. The inner surface of the chamber is tapered in order to prevent unburned debris from advancing prematurely; however, angled flights, positioned along the inner surface, cause the residual ash to advance with each successive revolution of the combustion chamber. The resulting combination of gases and ash are then forwarded to an afterburner for completion of the combustion and disposal of the ash.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: October 19, 1999
    Assignee: Atlantic Pacific Energy Systems, Inc.
    Inventors: Jack B. Larson, James C. Branscome
  • Patent number: 5927215
    Abstract: A preheater in an incineration system consists of: a first opening through which refuse is input; a second opening which is formed under the first opening and communicates with an incinerator; a heat flow passageway which is formed between the first and second openings, and passes the heat generated by the incinerator; and a receiving unit between the two openings which rotates the refuse in the heat flow passageway.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: July 27, 1999
    Assignee: Yaichiro Moriguchi
    Inventor: Yaichiro Moriguchi
  • Patent number: 5647288
    Abstract: In a scrap conveyor for feeding a scrap to a processing furnace such as an arc furnace, etc, while pre-heating the scrap by an exhaust gas from the processing furnace, the periphery of the scrap conveyor is covered with a gas seal cover, a flue is disposed above the scrap conveyed, an exhaust gas passage portion is disposed below the scrap conveyor, and an exhaust gas suction duct opening to the exhaust gas passage portion through an exhaust gas suction space is disposed. In the conveyor, an exhaust gas flow passage for allowing the exhaust gas inside the flue to pass through the scrap from its surface layer to its lower layer is formed inside the layer of the scrap, so that pre-heating of the scrap can be efficiently effected throughout the whole layer of the scrap.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: July 15, 1997
    Assignee: Nippon Steel Corporation
    Inventors: Hiroshige Matsumoto, Makoto Takahashi, Hitoshi Kuroda
  • Patent number: 5454333
    Abstract: A method and apparatus for continuously feeding hazardous waste fuels having a relatively high solids content to a rotary cement kiln by delivering the fuel to a feed hopper with screw-conveyor which transfers the fuel to a filling zone where a piston pump capable of pumping a composition having a solids content of at least 40% with particle sizes up to a maidmum of 2 inches continuously charges the fuel through a conveyance tube into a feed tube which introduces the fuel into the kiln through the feed end housing.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: October 3, 1995
    Assignee: Southdown, Inc.
    Inventors: H. Michael Von Seebach, E. J. Marston, III
  • Patent number: 5433018
    Abstract: The present invention includes a purge chamber which includes a chamber holding the interlocking solid material. An entrance port apparatus passes the interlocking solid material into the chamber where it is purged by a purging gas. An exit port apparatus passes the solid interlocking solid material from the chamber. Located within the chamber is other apparatus which move the interlocking solid material from the chamber through the exit port apparatus and other apparatus which prevent the binding of the interlocking solid material.
    Type: Grant
    Filed: October 28, 1993
    Date of Patent: July 18, 1995
    Assignee: Texaco Inc.
    Inventors: Vahan Avetisian, Constantin Bugescu, Craig J. Castagnoli, Suk-Bae Cha
  • Patent number: 5357881
    Abstract: This invention comprises a combined cellulose sludge dryer and burner in which the drying procedure is positively and automatically controlled in response to the moisture content of the dewatered raw sludge supplied to the dryer headbox and carried through a drying chamber to discharge a dried sludge having but a 15% moisture content and suitable to be burned to provide the hot air for the drying procedure. With the sludge being critical as to charring, a temperature of 300 degrees Fahrenheit to prevent pre-burning and charring of the sludge has to be maintained in the drying chamber and positive and automatic control for the hot air to maintain the temperature is done by checking differences between input and output temperatures of the dryer and diluting the air produced by the burner by the use of a heat exchanger and air dampers. The extracted wet air from the drying chamber and diverted over-supply of air to the drying chamber are delivered through a scrubber and chimney to the atmosphere.
    Type: Grant
    Filed: February 9, 1993
    Date of Patent: October 25, 1994
    Assignee: Northrop Engineering Corporation
    Inventors: Andrew W. Elcik, John J. Devine, John H. Northrop, Kurt T. Dunn, John F. Healey
  • Patent number: 5253597
    Abstract: A method for economically separating chemical contaminants such as volatile and semivolatile organic chemicals and polychlorinated biphenyls (PCBs), even if the contaminants are present at low concentrations, from inert materials such as soils or sludges is disclosed. The process comprises subjecting inert materials contaminated with chemical compounds to vacuum at a temperature effective to volatilize the contaminants but below incineration temperature, while continuously removing the evolved vapors, for a period of time sufficient to effect the desired degree of separation of contaminants. The evolved vapors may be collected and condensed for off-site disposal.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: October 19, 1993
    Assignee: Chemical Waste Management, Inc.
    Inventors: Carl P. Swanstrom, Peter G. Romzick, Carl R. Palmer
  • Patent number: 5233763
    Abstract: A sludge drying apparatus (10) including a housing through which air is recirculated wherein makeup air forms an air curtain assuring recirculation of heated air. The housing (12) includes a receiving station (14) in which sludge (20) is deposited on a conveyor belt (18). The conveyor belt (18) moves the sludge (20) to a drying station (16) where infrared heaters (42) radiate infrared heat on the sludge. Air for drying the sludge circulates from a fan plenum (28) to an air supply plenum (24). Air from the air supply plenum (24) passes across the face of the infrared heaters (42), and is directed downwardly toward the sludge (20) in a belt passageway (30). Air is returned through a return air plenum (26) located below the belt passageway (30). Part of the air received by the return air plenum (26) is ported directly from the belt passageway (30) to the return air plenum (26).
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: August 10, 1993
    Inventor: Clarence O. Minnie, Jr.
  • Patent number: 5161326
    Abstract: A method and apparatus for treating soil contaminated with hydrocarbons by breaking up the soil into discrete particles and passing the particles through an open flame to cause the volatile substances in them to vaporize and burn. The apparatus is preferably portable and provides for continuous processing of the contaminated soil on-site so that it can be immediately returned to the ground free from contamination.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: November 10, 1992
    Inventors: Frank H. Weirich, Claudia A. Wright, Jon K. Hake
  • Patent number: 4951417
    Abstract: A method and apparatus for on-site remedial soil restortation activity of a work site contaminated with volatile organic compounds. Soil is removed from the ground and hauled to an initial feed hopper whereat it is conveyed to an inlet end of a hollow rotating cylinder having plural flights therein for effecting a moving of the contaminated soil lengthwise of the rotating cylinder toward an outlet end. The soil is heated as it tumbles about in the cylinder and the volatile organic compounds (VOCs) are volatilized inside the rotating cylinder. The soil exiting the outlet end of the cylinder is thence recirculated through the rotating cylinder and thereafter fed to a conveying mechanism, whereat the cleaned soil is delivered to a selected location. The hot gases are scrubbed to remove therefrom any organics, acids and phosgenes and, if present, soil fines. The now cleansed gases are thereafter allowed to escape into the atmosphere as clean air.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: August 28, 1990
    Assignee: Canonie Environmental Services Corp.
    Inventors: Steven L. Gerken, Brian M. Bell, John P. Isley
  • Patent number: 4882903
    Abstract: A combined cycle waste-to-energy plant is utilized to thermally convert municipal and industrial solid wastes into essentially complete products of combustion and use the combustion heat to produce steam and/or electrical power. The plant includes a building enclosure having a waste receiving area, a waste fuel separation and processing area, an incinerator area and a heat recovery and power generation area. Processed waste fuel is delivered to a series of incinerators by an automated conveyor and hopper system, and the waste fuel is burned in the incinerators by hot exhaust gas delivered thereto from one or more combustion turbines located outside the building and drivingly connected to electrical generators. Inlet air to the turbines is drawn from with the building to maintain its interior at a negative pressure, thereby preventing waste odors and pathogens from escaping from the building.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: November 28, 1989
    Assignees: CH Guernsey & Company, Maurice G. Woods, Teresa J. Woods, Applied Thermal Systems, Inc.
    Inventors: William L. Lowry Jr., Maurice G. Woods, Charles A. Martin
  • Patent number: 4827853
    Abstract: Initially moist metal hydroxide sludge is formed into a suitable mass, such as sludge cakes (2) which are fed downwardly in a hopper (1) and pressed into the cells (7) of a multi-cellular moving metal belt (5) in a two-stage process. The first stage deposits the sludge roughly into the cells, while the second stage compresses and compacts the deposited sludge tightly into the cells so that the sludge is in intimate contact with the cell walls throughout each cell. The sludge-filled belt is passed through a dryer (3) whereby the belt is subject to indirect, rather than direct, heating. More particularly, the belt passes through an enclosed muffle (21) and is caused to be in direct heat-exchanging contact with the bottom muffle wall (23). The latter wall is heated from beneath and outside the muffle chamber, as by heated air jets.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: May 9, 1989
    Assignee: Oven Systems, Inc.
    Inventor: Michael F. Emery
  • Patent number: 4815397
    Abstract: A method and apparatus for treating sludge from a paint spray booth operation. The sludge from the spray booth is deposited onto a porous belt of a conveyor system to allow the water to pass through the belt where it is collected for discharge from the apparatus. The remaining residue is passed over a vacuum device positioned beneath the belt and is then carried by the belt through an oven comprising a series of infrared thermal reactors arranged in serial fashion over the belt. The sludge is passed continuously beneath the infrared reactors and is dried thereby so that the sludge leaving the apparatus is in a dried particulate form which may be readily disposed of and/or solid. Convection air is recirculated through the apparatus to preheat the incoming sludge, remove smoke and other contaminants from the oven, and provide the desired pressure condition within the oven to optimize the efficiency of the thermal reactors.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: March 28, 1989
    Assignee: Warren Engineering Corporation
    Inventor: Clarence O. Minnie, Jr.
  • Patent number: 4789332
    Abstract: A process and apparatus for removing volatile contaminants from scrap metal is disclosed. The process is carried out in a furnace maintained at a relatively constant temperature and having a first zone in which volatiles contained on the surface of the metal are vaporized and a second zone in which carbon contained on the surface of the metal is pyrolyzed. The furnace also has a conveyor for transporting metal therethrough at a specific speed to ensure complete vaporization and pyrolysis of the contaminants. The process includes the steps of sufficiently vaporizing the volatiles without oxidizing the metal, the vaporizing producing fumes containing unburned hydrocarbons. The hydrocarbon fumes are then burned to produce hot gas which is recirculated to the furnace. The hot gas contacts the incoming metal and vaporizes the volatiles contained thereon.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: December 6, 1988
    Assignee: Aluminum Company of America
    Inventors: Everett M. Ramsey, Bruce A. Gray, Donald C. Evans
  • Patent number: 4784603
    Abstract: A process and apparatus is disclosed for removing volatile contaminants from scrap metal. The process is carried out in a furnace maintained at a relatively constant temperature having a first zone in which volatiles contained on the surface of the metal are vaporized and a second zone in which carbon contained on the surface of the metal is pyrolyzed. The furnace also has a vibrating conveyor for transporting metal therethrough at a specific speed. The process includes the step of vaporizing and fluidizing the volatiles to produce fumes containing unburned hydrocarbons without oxidizing the metal. The hydrocarbon fumes are then burned to produce hot gas which is recirculated to the furnace so as to contact new incoming scrap metal.
    Type: Grant
    Filed: October 16, 1987
    Date of Patent: November 15, 1988
    Assignee: Aluminum Company of America
    Inventors: Casimir B. Robak, Jr., Donald C. Evans, Everett M. Ramsey
  • Patent number: 4774894
    Abstract: System and method for burning wood and other fuel materials in a substantially smokeless manner. The fuel material is fed to the inlet end of an inverse pile burning chamber through an air lock chamber having inlet and outlet gates to prevent smoke from escaping from the inlet end of the burning chamber. The burning chamber is inclined in a downward direction from its inlet end to its outlet end, and the angle of inclination can be adjusted to facilitate the passage of different types of fuel material through the burning chamber. Combustion gases from the burning chamber are utilized for drying the fuel material before the material is delivered to burning chamber.
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: October 4, 1988
    Inventor: R. Edward Burton
  • Patent number: 4745869
    Abstract: A method and apparatus for calcining limestone to produce lime wherein coal is combusted to provide heat for the calcination. The coal is combusted in a two stage combustion unit, with at least seventy-five percent of the slag formed by the coal combustion removed from the first stage of the combustion unit. Residual gases and fuel are further combusted in the second stage of the two stage combustor, with hot combustion gases therefrom, having the molten slag removed, fed directly to the calcining chamber of a rotary lime kiln. The coal may be carbonized to form a char and a fuel gas for use in the two stage combustor.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: May 24, 1988
    Assignee: Westinghouse Electric Corp.
    Inventors: James A. Dilmore, Suh Y. Lee, William E. Young, Wesley M. Rohrer, Jr.
  • Patent number: 4738206
    Abstract: Apparatus and method for removing volatile and semi-volatile organic contaminants from natural soil containing moisture by sealing the soil in a stripping conveyor against contact with air and vapor stripping the contaminants at a temperature below the boiling temperatures of the contaminants.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: April 19, 1988
    Assignee: Roy F. Weston, Inc.
    Inventor: John W. Noland
  • Patent number: 4726301
    Abstract: A system wherein the contaminated cuttings are fed into the system for eventual incineration. The principal apparatus of the system comprises a plurality, preferrably three, of horizontally disposed cylindrical drying chambers mounted onto a skid for receiving contaminated cuttings into each separate chamber. There is provided on the first end of the chambers a receiving bin or hopper, wherein the cuttings are received from the shakers or the like into the bin, and dropped into an opening in the first end of the three chambers. Each chamber is provided with a seperate variable motor controlled auger disposed substantially throughout the length of the chamber wherein rotation of the auger would move the cuttings along the length of the interior of the chamber. The second end of each chamber is provided with a lower exit chute for removal of the cuttings from the chamber as the auger has moved into position.
    Type: Grant
    Filed: March 17, 1986
    Date of Patent: February 23, 1988
    Inventors: Farrell P. Des Ormeaux, Thomas F. Des Ormeaux, Mark R. Des Ormeaux
  • Patent number: 4656955
    Abstract: In an improved refuse incineration system, wet refuse is heated in a dryer by inlet superheated steam in direct contact to remove most moisture therefrom while converting such moisture into outlet steam also in superheated state. The dried refuse is then fed into a boiler, through which the outlet superheated steam is circulated to raise temperature to much higher superheated level and recycled to the dryer as inlet superheated steam. This system will greatly increase the drying efficiency and productivity and thus reduce the necessary volume of the dryer.
    Type: Grant
    Filed: May 1, 1986
    Date of Patent: April 14, 1987
    Inventor: Tsung H. Kuo
  • Patent number: 4643108
    Abstract: A method and apparatus for dehydrating a metal hydroxide sludge, including depositing the concentrated metal hydroxide sludge containing approximately 60-80% water into a feed hopper, breaking up the concentrated sludge with rotary beaters and preferably a rotary breaker bar, then transferring the broken sludge through a feed auger to an elongated dehydrater chamber in which the sludge is conveyed longitudinally along the dehydrater chamber by a dryer auger continuously in contact with a longitudinally flowing hot gas. The moisture-laden hot gas is exhausted from the outlet end of the dehydrater chamber while the dryed sludge is deposited through a discharge port.
    Type: Grant
    Filed: January 3, 1986
    Date of Patent: February 17, 1987
    Inventors: Daniel D. Singelyn, Paul J. Singelyn
  • Patent number: 4635379
    Abstract: The invention relates to a method of drying particle material in a bed under pressure by indirect heating. The method according to the invention is carried out so that the steam driven off from the material is superheated with heat of a higher temperature, that the steam is passed through the material bed, which is advanced slowly. The steam leaves the bed at a low speed, thereby preventing greater material particles from following along with the steam from the bed. The steam heat is recovered in a manner known per se.
    Type: Grant
    Filed: May 14, 1984
    Date of Patent: January 13, 1987
    Inventor: Erik G. Kroneld
  • Patent number: 4628828
    Abstract: An ash handling system includes a conveyor and crusher extending from an ash collection trough beneath an underfeed stoker retort to a hopper from which ash is discharged into an ash receiving zone of a container. A suction nozzle is used to extract ash from the zone for disposal.
    Type: Grant
    Filed: November 6, 1984
    Date of Patent: December 16, 1986
    Assignee: Coal Industry (Patents) Limited
    Inventors: Roy D. Holtham, Anthony J. Falconer, John F. G. Grainger
  • Patent number: 4606283
    Abstract: A system wherein the contaminated cuttings are fed into the system for eventual incineration. The principal apparatus of the system comprises a plurality, preferably three, of horizontally disposed cylindrical drying chambers mounted onto a skid for receiving contaminated cuttings into each separate chamber. There is provided on the first end of the chambers a receiving bin or hopper, wherein the cuttings are received from the shakers or the like into the bin, and dropped into an opening in the first end of the three chambers. Each chamber is provided with a separate variable motor controlled auger disposed substantially throughout the length of the chamber wherein rotation of the auger would move the cuttings along the length of the interior of the chamber. The second end of each chamber is provided with a lower exit chute for removal of the cuttings from the chamber as the auger has moved them into position. The cuttings would then be collected in a polyurethane bag or the like.
    Type: Grant
    Filed: March 13, 1985
    Date of Patent: August 19, 1986
    Inventors: Farrell P. DesOrmeaux, Thomas F. DesOrmeaux, Mark R. DesOrmeaux
  • Patent number: 4592290
    Abstract: Stalks of crop material, especially straw, are incinerated by comminuting them to pieces having a length of substantially 8 to 10 cm, pneumatically transporting the stalks to a separator in which the air is separated from the stalks and the stalks are then compacted and advanced in a rising bed into a furnace. Within the furnace, a low temperature distillation is initially effected and combustion is promoted along the free surface of the bed, in part sustained by the gases produced by the distillation. Ash as it is formed on the surface is entrained away with the hot gases. The ash is separated from the hot gases and advantageously collected in a water basin while the hot gases can be used for agricultural drying purposes and the ash for fertilizer.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: June 3, 1986
    Inventor: Franz Berthiller
  • Patent number: RE33776
    Abstract: Apparatus and method for removing volatile and semivolatile organic contaminants from natural soil containing moisture by sealing the soil in a stripping conveyor against contact with air and vapor stripping the contaminants at a temperature below the boiling temperatures of the contaminants.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: December 24, 1991
    Assignee: Roy F. Weston, Inc.
    Inventor: John W. Noland