Preheating Patents (Class 202/150)
  • Patent number: 9005401
    Abstract: A system for tire distillation including an upper chamber, a first conveyor configured to transport a tire through the upper chamber, a lower chamber located beneath the upper chamber, the lower chamber that includes an ultrasonic purge chamber configured to radiate the tire with ultrasonic radiation, a microwave radiation chamber configured to radiate the tire with microwave radiation, and a second conveyor configured to transport the tire from the ultrasonic purge chamber to the microwave radiation chamber. The system further includes a vacuum system configured to maintain an atmosphere in the ultrasonic purge chamber and the microwave radiation chamber under a vacuum wherein the tire is preheated during conveyance through the upper chamber from heat produced in the lower chamber.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: April 14, 2015
    Assignee: Infinite Earth, Inc.
    Inventor: James C. Johnson
  • Patent number: 8986507
    Abstract: Methods, devices and systems for continuously converting biomass are described herein. A device has a feed section for holding a moving bed of biomass, namely wood, having a drying section, a flame zone for degassing, and a, smolder zone for carbonizing the biomass into a solid converted product, namely charcoal. The device includes a tank for collecting the solid converted product arranged below a grate and coupled with the feed section in a gas-tight manner. The system comprising the device, a biogas plant and/or a combined heat and power plant conveys the liquid converted product, namely pyroligneous acid or acetic acid, to the biogas plant and/or the solid converted product, namely charcoal, to the combined heat and power plant.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: March 24, 2015
    Assignee: European Charcoal AG
    Inventor: Bernd Schottdorf
  • Patent number: 8951390
    Abstract: A reactor for the continuous production of charcoal, having a substantially vertical structure, comprising, in sequence, a top charging zone, a drying zone, a carbonization zone, a cooling zone, and a discharge zone, wherein the charging zone has a smaller cross section than the drying zone and has an extension into the drying zone , forming an annular space around the extension, which space comprises, in the wall of the drying zone, an outlet to a gas extraction line for the recirculation of these gases into the reactor. The reactor reduces sawdust drag by the gases extracted from the preheating zone, without substantially altering the shape and the size of the reactor, which is achieved due to the fact that the charging zone is arranged eccentrically relatively to the drying zone, and that the outlet to the gas extraction line of the drying zone is located substantially on the larger area section of the annular space.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: February 10, 2015
    Assignee: V&M do Brasil S.A.
    Inventors: Vamberto Ferreira de Melo, Túlio Jardim Raad, Romero Mantuano Netto, Henri Bordet, Remi Bordet
  • Publication number: 20150001061
    Abstract: A system and process for converting plastics and other heavy hydrocarbon solids into retail petroleum products are provided. The plastics are processed by melting, pyrolysis, vapourization, and selective condensation, whereby final in-spec petroleum products are produced. The system provides a reactor for subjecting the plastics to pyrolysis and cracking hydrocarbons in the plastics to produce a plastics vapour comprising hydrocarbon substituents; one or more separation vessels for separating the plastics vapour into hydrocarbon substituents based on boiling points of the hydrocarbon substituents; one or more condensers for condensing the hydrocarbon substituents into one or more petroleum products; and means for collecting the one or more petroleum products. Fuels generated during the process can be recycled for use upstream in the process.
    Type: Application
    Filed: August 5, 2011
    Publication date: January 1, 2015
    Applicant: JBI INC.
    Inventor: John William Bordynuik
  • Publication number: 20140332363
    Abstract: A continuous system for gasification of a biomass feedstock comprising: a fuel conditioning zone, a gasification zone and a char cooling area.
    Type: Application
    Filed: February 6, 2013
    Publication date: November 13, 2014
    Inventor: Michael MCGOLDEN
  • Publication number: 20140251783
    Abstract: A fluid coking unit for converting a heavy oil feed to lower boiling products by thermal has a centrally-apertured annular baffle at the top of the stripping zone below the coking zone to inhibit recirculation of solid particles from the stripping zone to the coking zone. By inhibiting recirculation of the particles from the stripping zone to the coking zone, the temperatures of the two zones are effectively decoupled, enabling the coking zone to be run at a lower temperature than the stripping zone to increase the yield of liquid products.
    Type: Application
    Filed: February 20, 2014
    Publication date: September 11, 2014
    Applicant: ExxonMobil Research and Engineering Company
    Inventors: Bing Du, Timothy M. Healy, Fritz A. Bernatz, Yi En Huang, Zachary R. Martin, Brenda A. Raich
  • Patent number: 8808509
    Abstract: Pyrolytic gas generator for generating clean useful gas from biomass, particularly wood, oil seeds or the like, where a gasification channel in multi-chambered construction is provided, which gasification channel is provided with an assist burner which can supply heat from the outside to the gasification channel during gasification of the biomass, a pre-pyrolyzing pipe is connected upstream of the gasification channel and an ash discharge downstream of the gasification channel, wherein the generated gases are re-gasified in the gasification channel while the material to be gasified is mechanically transported from a material container to the ash discharge.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: August 19, 2014
    Assignee: von Goertz & Finger GmbH
    Inventor: Ulrich Finger
  • Patent number: 8409406
    Abstract: A processor for vacuum distillation of whole tires including; an insulated housing having a door on one end, and rails on a lower surface of the housing to support a cart loaded with whole tires. A plurality of first heat tubes arranged around and spaced from a central radiant heat tube, the central radiant heat tube having an unsupported end adjacent the door such that whole tires loaded on the cart and through the door will pass over the central radiant heat tube such that the central radiant heat tube is located in a central opening of each tire on the cart.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: April 2, 2013
    Inventor: Harvey Buhr
  • Publication number: 20110198207
    Abstract: The Ultrasonic Microwave Molecular Vacuum Distillation System for Waste Tires is an apparatus that uses a combination of vacuum, ultrasound, and microwave technology to separate components of waste tires. The combination of technologies creates molecular distillation to separate carbon, fuel oil, combustible gas vapors and high tensile strength steel.
    Type: Application
    Filed: February 17, 2010
    Publication date: August 18, 2011
    Inventor: James C. Johnson
  • Publication number: 20100300864
    Abstract: A method for the reduction of mercury emissions from an industrial plant that utilizes a cement or minerals kiln that has a high level of mercury emissions during specific operating conditions. The invention reduces a large spike in mercury emissions typically seen in cement kiln systems when the in-line raw mill is shut-down and all preheater gases are vented to the stack directly. The invention diverts the preheater gases to a cooling device that functions as an adsorption reactor to provide mercury absorption during periods when the raw mill is not in operation.
    Type: Application
    Filed: May 28, 2009
    Publication date: December 2, 2010
    Inventors: Ove Lars Jepsen, Peter T. Paone, III, John S. Salmento
  • Patent number: 7767187
    Abstract: An apparatus for separating carbon products from used tires includes a decomposing chamber into which used tires are charged, a nitrogen gas supply device that supplies nitrogen gas into the decomposing chamber, one or more magnetrons that generate microwave of predetermined frequency and one or more phase shifters that removes interference between microwaves generated by the magnetrons, a receiving plate that is adapted to receive carbon black and iron cores generated by the decomposing process, a tire support that is adapted to support used tires, an opening and closing device that opens or closes a door on which used tires are placed, conveyor belt that moves carbon black and iron cores to a desired location after decomposition is complete, and a cooling plate that is provided in an upper portion of the apparatus and cools down gaseous oil that is generated by decomposition by microwave into liquid oil.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: August 3, 2010
    Inventor: Charlie Hong
  • Patent number: 7344622
    Abstract: A pyrolysis process and reactor converts various hydrocarbons such as waste materials, for example, scrap polymers, tires, etc., into various chemical components or amounts thereof, not otherwise produced by conventional pyrolytic processes. A large reactor size is utilized in association with a low heat input per unit weight of charge. A thick pyrolyzate/“char” layer is formed during pyrolysis. The product or various components thereof can be utilized as a fuel or octane additive.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: March 18, 2008
    Inventor: Charles W. Grispin
  • Patent number: 7101464
    Abstract: A microwave distillation apparatus provides destructive distillation of whole waste tires. The apparatus includes a housing including a plurality of vertically arranged chambers. A preheat chamber provides preheating of a whole waste tire received therein. An irradiation chamber, located below the preheat chamber and thermally coupled to the preheat chamber such that heat generated in the irradiation chamber creates heat convection currents in the preheat chamber, receives a preheated whole waste tire from the preheat chamber. A microwave energy supply supplies microwave energy to the irradiation chamber to provide destructive distillation of a tire received in that chamber. A cooling chamber, located below the irradiation chamber, receives by-products of the destructive distillation therefrom and provides delivery of the by-products from the housing.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: September 5, 2006
    Assignee: The Tire Chief, Inc.
    Inventor: Joe Allen Pringle
  • Patent number: 7037410
    Abstract: An improved process and apparatus for the destructive distillation or pyrolysis of rubber, such as used rubber tires, to produce liquid and gaseous hydrocarbons and a solid carbonaceous char. A heat transfer gas circulating in a circulation loop is used to cool the hot char produced in the distillation chamber of a distillation oven, the circulation loop having some means for removing the heat transferred to the heat transfer gas from the hot char. In one embodiment, two distillation ovens are operated in off-set, batchwise distillation cycles. The distillation cycles in the two ovens are coordinated so that a fresh charge of rubber feed is introduced into the distillation chamber of one of the ovens as the distillation of rubber in the other oven is concluded.
    Type: Grant
    Filed: February 22, 2002
    Date of Patent: May 2, 2006
    Assignee: Gentech, Inc.
    Inventor: V. J. Flanigan
  • Patent number: 5993751
    Abstract: Embodiments of a pyrolizer are disclosed in which carbonaceous materials are pyrolyzed in a two stage process. In the first stage the materials are moved through a pretreater using augers and are heated to between 180 and 220 degrees C. In the second stage the materials are moved through a pyrolysis reactor using augers and are heated to between 500 and 1,100 degrees C.
    Type: Grant
    Filed: June 2, 1998
    Date of Patent: November 30, 1999
    Inventors: Jack Moriarty, Bill Moriarty, Nathan Moriarty
  • Patent number: 5302254
    Abstract: A plant for treating industrial and/or urban waste includes a stage for drying of the waste, followed by a stage for effecting thermolysis of the dried waste and a stage for effecting recovery of the solids and gases resulting from the thermolysis. Thermolysis of the waste is effected in a reactor by indirect heat exchange with combustion gases and drying gases for drying of the waste are subsequently treated to remove vapor materials and then recycled to a gas generator for generating the drying gases. Additionally the plant includes a stage for effecting dechlorination of the solids resulting from the thermolysis by washing the solids with an aqueous liquid, as well as a stage of separating the wash solids and the resulting wash liquid.
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: April 12, 1994
    Assignee: Institut Francais Du Petrole
    Inventors: Gerard Martin, Robert Gaulard
  • Patent number: 5230777
    Abstract: A method and apparatus for producing fuel and carbon black from rubber are disclosed. The method and apparatus produce a liquid fuel that is low in sulfur content, gaseous hydrocarbons, and solid carbonaceous materials from used rubber tires. Rubber is heated under negative pressures in the presence of a minimal amount of oxygen. The methods and apparatus of the present invention also produce little air emissions and conserve energy.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: July 27, 1993
    Inventor: James Jarrell
  • Patent number: 4600476
    Abstract: A retort apparatus for recovering oil from crushed oil shale moved through an elongated housing, includes a plurality of heat exchangers located in the housing for transferring heat to or from the shale. The heat exchangers are spaced to define in sequence a drying zone, a preheating zone, a cracking and distillation zone, and a waste heat recovery zone. An auxiliary heating assembly connected to the heat exchangers delivers sufficient heat to raise the temperature of the shale in the cracking and distillation zone to the critical temperature for separating hydrocarbons in vapor form therefrom. The tubes of the heat exchangers are elongated ovals in cross-section and are offset from each other in alternate rows to increase the area of heat exchange and to reduce the temperature drop between the entering heated air and exiting heated air flowing through each heat exchange tube.
    Type: Grant
    Filed: February 28, 1985
    Date of Patent: July 15, 1986
    Assignee: Edwards Engineering Corporation
    Inventor: Ray C. Edwards
  • Patent number: 4502920
    Abstract: An improved retort apparatus for recovering oil from crushed oil shale moved by gravity through a passageway of an elongated housing includes a control assembly connected adjacent the outlet end of the housing to control the rate of movement of the crushed oil shale through the passageway. A plurality of heat exchangers are located in the housing for transferring heat in sequence to or from the crushed oil shale. The heat exchangers are spaced to define a drying zone, a preheating zone, a hydrocarbon recovery zone, and a waste heat recovery zone. A pump recirculating circuit is provided for passing waste heat recovered from the waste heat recovery zone to the preheating zone. An auxiliary heating assembly connected to the heat exchangers in the hydrocarbon recovery zone delivers sufficient heat to raise the temperature of the crushed oil shale moving through the hydrocarbon recovery zone to the critical temperature for separating hydrocarbons in vapor form therefrom.
    Type: Grant
    Filed: January 14, 1983
    Date of Patent: March 5, 1985
    Assignee: Edwards Engineering Corporation
    Inventor: Ray C. Edwards
  • Patent number: 4445910
    Abstract: A gas generating system deriving useful BTU products from cellulosic waste material and comprising a conical shell to which the waste material is fed at the bottom and moved upwardly by an auger to permit the expanding walls of the cone to loosen the material by sintering action in the upper portion of the shell in a combustion zone located above the level of a row of air inlet ports substantially midway of the shell, the shell also having a gas accumulating chamber in the top thereof and a gas discharge device leading from the chamber to gas purifying and cooling mechanism including spray devices, a settling tank and liquid storage tank operating in a manner to re-use liquid incident to the operation of the spray devices. Operation of the controlled air delivery to the nozzles and cone also can be regulated to produce desirable amounts of charcoal and mechanism is included to remove the same from the cone.
    Type: Grant
    Filed: July 9, 1982
    Date of Patent: May 1, 1984
    Inventor: Edwin H. Zimmerman
  • Patent number: 4348211
    Abstract: A gas generating system utilizing cellulosic waste, such as sawdust and the like, of a low BTU rating, which is partially dried on the closed top of, and then fed to the bottom of a conical generator into which a limited air supply is delivered to the upper portion of the generator where a combustion zone occurs to sinter the material and form steam and wood gas (methane) which passes to and through a heat exchange coil in an after-cooler tank in which water is heated incident to cooling the gas which successively passes through several cyclone units which successively remove dust, ash, creosote and other condensates, a blower also being included to induce a low rate of suction in the system to insure movement of the gas through the system which finally preferably is passed through a scrubber to clean the gas product of any appreciable impurities and the scrubbing water is recirculated to absorb more impurities after being stratified to remove heavy condensates and other solids.
    Type: Grant
    Filed: February 6, 1981
    Date of Patent: September 7, 1982
    Inventor: Edwin H. Zimmerman
  • Patent number: 4338160
    Abstract: A plant for pre-heating by fluidizing and for milling coking coal in a treatment chamber is combined, by means of heat a exchanger interposed in a circuit for recirculating heat-conveying gas, with a plant for the dry quenching of hot coke in a quenching chamber. The flow, through the heat exchanger, of recycled quenching fumes of the coke is regulated in dependence on the rate at which the coal is introduced into the treatment chamber by a screw conveyor. An auxiliary heat combustion chamber permits precise control of the temperature in the treatment chamber.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: July 6, 1982
    Assignee: Charbonnages de France
    Inventors: Serge Delessard, Roger M. Puff
  • Patent number: 4325787
    Abstract: A continuously operable retort-type processing system for the recovery of petroleum-like products from comminuted oil-bearing shale and other oil-yielding particulate solid materials. The retort portion of the system includes an insulated retort outer shell for a wall jacket-type heat exchanger. Disposed within the retort, all driven from a common axially disposed motor-driven shaft, are a plurality of stirring fingers, wall scrapers and discharge shovels, the latter for use in discharge of spent solid material from the retort. The system envisions burning gases from the process to provide a fluid heat exchange medium as a source of the heat required for the process. The system further includes means for the admixture of steam and acetic acid with the starting particulate materials prior to its introduction into the retort.
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: April 20, 1982
    Assignee: Georgia Oil and Gas Company
    Inventor: Louis Strumskis
  • Patent number: 4306941
    Abstract: A dry coke quenching process comprises the steps of preheating a coke from a coke oven to a temperature of not lower than C. by way of burning over its layer a combustible gas mixed with heated air, cooling the coke first to a temperature of not lower than C. with a mixture of hydrocarbons and water vapor, and then with an inert gas to a temperature of from to C.An apparatus for effecting the process of the invention comprises a chamber lined from inside with refractory brick and provided with a means for introducing a combustible gas and heated air to the upper part of the chamber and for discharging combustion gases therefrom. Provided in the middle part of the chamber are means intended for a heated mixture of hydrocarbons and water vapor to pass in therethrough and for a flow of the resultant gas containing hydrogen and carbon monoxide to escape therethrough.
    Type: Grant
    Filed: July 8, 1980
    Date of Patent: December 22, 1981
    Inventors: Vasily E. Privalov, Ivan G. Zubilin, Zoltan-Ivan I. Todavchich, Nikolai K. Kulakov, Adolf N. Silka, Alexandr N. Minasov, Mikhail G. Ananievsky, Naum E. Temkin, Vyacheslav I. Solodkov
  • Patent number: 4293388
    Abstract: Abrasion-proof coke forms are produced from bituminous coal, brown coal, or peat in the form of briquets, by preheating the briquets, dehydrating or predrying them, carbonizing them and then cooling them in at least three separate stages in which the briquets are dehydrated indirectly by subjecting them to indirect temperature conditions, producing a temperature gradient in the briquets. The briquets are automatically fed into a shaft tower which includes an upper drying shaft portion made up of a plurality of stacked radiators which include tube elements for the passing of a heating fluid, such as steam, therethrough and which define vertical shaft passages through which the briquet forms are passed downwardly and into a carbonizing shaft which has separate gas channels for directing heating gases therethrough and to a heating flue and which subsequently includes a lower cooling zone through which the briquets pass and then into a discharge channel where they are delivered for classification.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: October 6, 1981
    Assignee: Firma Carl Still GmbH & Co. KG
    Inventors: Kurt Lorenz, Horst Dungs, Hans B. Koenigs, Roman Kurtz
  • Patent number: 4288295
    Abstract: A coking oven having a coking chamber and a combustion chamber with a high temperature flue gas outlet connected to a first heat exchanger for heating cool air to cool the flue gases to an intermediate temperature, a coal dryer using the intermediate temperature flue gases for drying wet coal to a water content of a few percent by weight and preheating the coal to a temperature below the boiling point of water, a coal oiler to oil the partially dried and preheated coal, and a gas cleaner system for removing particulate matter from the low temperature flue gas coming from the coal dryer; also disclosed is an improved method of coking coal and apparatus for preheating and partially drying coal that can be added to existing coke oven structures.
    Type: Grant
    Filed: June 12, 1979
    Date of Patent: September 8, 1981
    Assignee: Interlake, Inc.
    Inventor: Brian W. H. Marsden
  • Patent number: 4284477
    Abstract: Vertically elongate pockets are defined between fixed and horizontally movable vertical refractory walls. When the bottom of the pocket is closed, coal dropped into the pocket from above is compressed between the fixed and movable walls and heated to coking temperature by hot gases in vertical flues extending through the refractory walls. When coked, the moveable wall recedes and the coke therein drops into a shaft furnace below, where devolatilization is complete and the coke is quenched in an inert gas atmosphere, which is totally enclosed to prevent air pollution.
    Type: Grant
    Filed: July 25, 1980
    Date of Patent: August 18, 1981
    Assignee: Mansfield Carbon Products, Inc.
    Inventor: Vaughn Mansfield
  • Patent number: 4276120
    Abstract: A process and apparatus are disclosed for purification of petroleum coke to produce an economical low sulfur product suitable for electrode production. Finely ground green coke is treated on an enclosed circular grate apparatus and subjected to sequential treatments in which hot gases are passed through a deep permeable bed of coke on the grate in a series of separate treating zones including a preheat zone, a heating and calcining zone, a desulfurizing zone in which hydrogen rich gas is passed through the heated bed, a reduction gas generation zone in which hydrocarbon and steam pass through hot coke to form hydrogen, and a cooling zone.Adequate temperatures for calcination and desulfurization are achieved and the proper heating rate is obtained without overheating the metal parts of the hearth by use of radiant and hot gas heating means in the calcining zone and in the desulfurizing zone and by introducing the air and/or fuel gas near the bottom of the coke bed.
    Type: Grant
    Filed: July 10, 1979
    Date of Patent: June 30, 1981
    Assignee: Davy Inc.
    Inventor: Irvin H. Lutz
  • Patent number: 4259157
    Abstract: Abrasion-proof coke forms are produced from bituminous coal, brown coal, or peat in the form of briquets, by preheating the briquets, dehydrating or predrying them, carbonizing them and then cooling them in at least three separate stages in which the briquets are dehydrated indirectly by subjecting them to indirect temperature conditions, producing a temperature gradient in the briquets. The briquets are automatically fed into a shaft tower which includes an upper drying shaft portion made up of a plurality of stacked radiators which include tube elements for the passing of a heating fluid, such as steam, therethrough and which define vertical shaft passages through which the briquet forms are passed downwardly and into a carbonizing shaft which has separate gas channels for directing heating gases therethrough and to a heating flue and which subsequently includes a lower cooling zone through which the briquets pass and then into a discharge channel where they are delivered for classification.
    Type: Grant
    Filed: April 17, 1979
    Date of Patent: March 31, 1981
    Assignees: Firma Carl Still GmbH & Co. KG, Rheinische Braunkohlenwerke Aktiengesellschaft
    Inventors: Kurt Lorenz, Horst Dungs, Hans B. Koenigs, Roman Kurtz
  • Patent number: 4248670
    Abstract: A device for producing abrasion-proof coke forms from bituminous or brown coal briquettes, charcoal or peat, comprising, a preheating stage, a dehydrating stage, a carbonization stage and a cooling stage, each stacked in a column to form a tower furnace. Each of the stages include an annular zone for receiving the coal or charcoal material and each stage is supplied with a separate and independent gas circuit. Each annular zone is formed between an inner substantially cylindrical jacket and an outer substantially cylindrical jacket with a shaft space defined in the inner cylindrical jacket. Heaters for the gas circuits of the preheating, dehydrating and carbonizing stages are disposed in the shaft space.
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: February 3, 1981
    Assignee: Firma Carl Still GmbH & Co. KG
    Inventors: Kurt Lorenz, Horst Dungs
  • Patent number: 4247366
    Abstract: A method of preparing and delivering coal to a coking plant, comprises, conveying the coal to the plant on a moving conveyor while an inert combustion gas is directed over the coal being conveyed. The combustion gas is generated by burning a fuel with air to produce a substantially inert combustion gas which is passed over the coal during its conveying and, thereafter, passed through a cooler for removing the moisture which has been picked up from the coal by the gas. The heating and predrying inert gases are advantageously generated by the direct combustion of air and fuel which are passed through flash dryer tubes and one or more separate separator systems and then delivered into a conveyor pipeline through which the coal is conveyed. A portion of the gases which are generated are also directed with a return gas to a filter for removal of any coal therefrom and to a cooler for removing the moisture picked up from the coal and then back into the stream for delivery to the conveyor for the coal.
    Type: Grant
    Filed: April 18, 1978
    Date of Patent: January 27, 1981
    Assignee: Firma Carl Still
    Inventors: Johannes Knappstein, Dieter Stalherm, Janos Bocsanczy
  • Patent number: 4246071
    Abstract: This invention is directed to a process for making coke and recovering the heat therefrom for preheating the firing gas to the coke oven. The process involves the use of the coke oven firing gas to extract the sensible heat from the hot coke from the coking oven to both preheat the firing gas for the coke oven and cool the hot coke. Significant economies are achieved in the two-fold function of coke production and heat recovery in accordance with the method disclosed.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: January 20, 1981
    Assignee: Didier Engineering GmbH
    Inventors: Dietrich Wagener, Claus Flockenhaus, Joachim F. Meckel
  • Patent number: 4240877
    Abstract: A method of preheating coal for coking comprises bringing a hot operating gas into direct contact with the coal to preheat the coal. Both the coal and the operating gas are passed into a separator and the separator is operated so as to effect the separation of the coarse preheated coal for delivery to the coke oven from the operating gases and coal dust. The operating gases and coal dust are then passed into a deduster to remove the coal dust from the operating gases. A portion of the removed dust is continuously directed into an accumulator. The dust is either supplied from the deduster or the accumulator to a combustion furnace where it is burned to generate at least a portion of the operating gas.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: December 23, 1980
    Assignee: Firma Carl Still GmbH & Co. KG
    Inventors: Dieter Stahlherm, Gerhard Rutkowski, Janos Bocsanczy, Hans Becker
  • Patent number: 4231844
    Abstract: A method of producing abrasion resistant coke from brown coal briquets in a shaft furnace comprises charging the coke briquets into the top of the furnace and removing coke from the bottom of the furnace while directing inert hot combustion gases into the furnace and through the briquets at a plurality of vertically spaced levels throughout the height of the shaft furnace. Gases are directed at temperatures to effect and successively lower stages of the furnace the preheating, predrying, carbonization, and cooling of the charge. Gases are collected in each of the preheating and predrying stages by the use of a tubular suction arm which extends substantially across the width of the furnace and includes a performated bottom and sidewalls which extend partly below the bottom and are provided with a saw-tooth configuration so as to withdraw the gases through the space below the bottom and through the perforations of the bottom and to effect entrainment of dust from the charge in so doing.
    Type: Grant
    Filed: March 9, 1979
    Date of Patent: November 4, 1980
    Assignees: Firma Carl Still GmbH & Co. KG, Rheinische Braunkohlwerke AG
    Inventors: Heinrich Weber, Kurt Lorenz, Horst Dungs, Roman Kurtz, Hans-Joachim Kersting
  • Patent number: 4226699
    Abstract: In a process for the retorting of oil shale wherein hot flue gases containing oxygen are used for preheating the raw oil shale and wherein, additionally, a combustible sludge containing particulate matter and bottoms oil is produced, method and apparatus are disclosed for forming a combustible mixture of the sludge and the gases whereby the sludge is combusted to raise the temperature of the gases and produce only entrained particulate matter as a by-product. By so doing, the requirement for additional fuel to heat the gases to operational temperatures is reduced and the sludge is eliminated as a by-product of the process requiring separate disposal. Rather, the entrained particulate matter is removed and disposed of along with particulate matter normally produced within the process.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: October 7, 1980
    Assignee: Tosco Corporation
    Inventor: John F. Nutter
  • Patent number: 4208251
    Abstract: A process comprising heating coal in a substantially air-free environment to liberate volatile materials and produce coke, condensing at least some of the volatile materials so liberated to liquefied products and dispersing the coke therein to form a coke slurry, feeding the coke slurry to a slurry pipeline, and pumping the coke slurry through the pipeline to a destination.Apparatus comprising a tube furnace having an external heating means for indirectly heating powdered coal therein in a substantially air-free environment to a temperature adequate to liberate volatile materials and produce coke, means to feed powdered coal to the furnace under pressure and force the volatile materials and coke produced in the furnace through the furnace to a condensing means in which at least some of the volatile materials are condensed with the coke dispersed therein to form a coke slurry, and means to convey the coke slurry from the condensing means to a pipeline for transport to a destination.
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: June 17, 1980
    Inventor: Ross H. Rasmussen
  • Patent number: 4198273
    Abstract: Green petroleum coke is indirectly dried, than calcined in a cylindrical rotary kiln and indirectly cooled utilizing a one-way gas flow in the system. Most of the dust in the vapor from the drying step is directly burned in a steam boiler whose off-gases are used to heat the dryer. Any residual dust in the gas is collected in an electro-filter. This dust together with dust which settles out from the dryer and the kiln is collected and added in controlled amounts to the dried coke before calcining. Hydrocarbons expelled during calcining are partially burned off with a stream of secondary air introduced at the coke exit end of the kiln. Most of the remaining hydrocarbons are burned off before they leave the coke inlet end of the kiln. The calcined coke product contains 0.1% by weight of hydrocarbons. The final off-gas from the process has a residual dust content of less than 100 mg/nm.sup.3.
    Type: Grant
    Filed: July 12, 1978
    Date of Patent: April 15, 1980
    Assignee: Wintershall Aktiengesellschaft
    Inventors: Max Dudek, Otto Tieke
  • Patent number: 4190497
    Abstract: After replacement of the walls of one chamber of a coking battery this one chamber is heated up by withdrawing relatively hot air from another still-hot chamber of the coking battery and injecting it into the cold chamber. This is done by means of a conduit extending between the two chambers and provided with an internal nozzle that conducts the hot gas from the hot chamber to the cool chamber by jet-pump action. This hot gas is mixed with relatively cool air so as slowly to heat the cool chamber up.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: February 26, 1980
    Assignee: Krupp-Koppers GmbH
    Inventors: Gunther Lagemann, Wilhelm Heisterkamp
  • Patent number: 4053364
    Abstract: In a coking installation moist coal to be converted into coke is dried and preheated by being contacted by a hot drying gas. The hot coke which is formed is subjected to a dry quenching in which at least a portion of the heat lost by the hot coke during the drying quenching thereof is imparted to the drying gas. There is provided a closed flow circuit for the continual recirculation of a body of drying gas. The closed flow circuit includes a portion in which the drying gas comes into contact with moist coal which is to be dried and preheated. When the drying gas comes into contact with the moist coal water vapor becomes mixed with the drying gas. The water vapor is removed from the drying gas by means of condensation.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: October 11, 1977
    Assignee: Buttner-Schilde-Haas Aktiengesellschaft
    Inventors: Werner Poersch, Martin Wischniewski, Jakob Essers