Including Air Supply Means Extending Vertically Within Refuse Patents (Class 110/251)
  • Patent number: 8667914
    Abstract: A process and related apparatus for the treatment of hazardous waste and an initially separate waste stream, the process comprising gasifying the waste stream in a gasification unit to produce an offgas and a char material; and plasma treating the offgas, and optionally the char material, in a plasma treatment unit to produce a syngas; and blending hazardous waste with the waste stream at a point in the process determined by the relative chemical and/or physical properties of the hazardous waste and the waste stream.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: March 11, 2014
    Assignee: Advanced Plasma Power Limited
    Inventors: Chris Chapman, Martin Brooks, Rolf Stein, Edward S. Manukian, Robert M. Clark
  • Publication number: 20130167760
    Abstract: The invention relates to a method for incinerating carbon-containing dry metallic ash and a pertinent device. The method comprises the steps of p) adding the metallic ash into a trough; q) aerating with ambient air from above, and concurrently, at least for part of the time, r) injecting air and/or oxygen through the trough hearth; s) establishing the ignition temperature; t) stirring of the metallic ash by means of a suitable tool; u) whereby the carbon content is reduced to less than 3%; and whereby steps b), c), and d) can proceed concurrently or in alternating order or pairs or all of these steps can proceed concurrently; step d) can just as well proceed selectively in partial quantities of the metallic ash; and whereby the reverse transport of ash through the trough hearth is prevented, whereas the supply of air and/or oxygen is maintained.
    Type: Application
    Filed: December 17, 2012
    Publication date: July 4, 2013
    Applicant: HERAEUS PRECIOUS METALS GMBH & CO. KG
    Inventor: Heraeus Precious Metals GmbH & Co. KG
  • Patent number: 8443741
    Abstract: A process for the treatment of waste, the process comprising either a gasification step or a pyrolysis step to produce an offgas and a non-airborne, solid char material; followed by a a plasma treatment step. An associated apparatus having a plasma treatment unit which is separate from the gasification unit or pyrolysis unit.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: May 21, 2013
    Assignee: Advanced Plasma Power Limited
    Inventors: Chris Chapman, David Ovens, David Deegan, Saeed Ismail
  • Patent number: 8438983
    Abstract: A process for the treatment of waste, the process comprising either a gasification step or a pyrolysis step to produce an offgas and a non-airborne, solid char material; followed by a plasma treatment step. An associated apparatus having a plasma treatment unit which is separate from the gasification unit or pyrolysis unit.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: May 14, 2013
    Assignee: Advanced Plasma Power Limited
    Inventors: Chris Chapman, David Ovens, David Deegan, Saeed Ismail
  • Patent number: 8365433
    Abstract: A technique by which various types of organic waste can be easily treated so as to obtain a reusable material. An apparatus is provided which comprises a vessel (20) for introducing organic waste (18) therein, the vessel being equipped with: stirring means (82), (92), and (98) for stirring the organic waste (18); steam supply means (62), (64), and (66) which supply high-temperature high-pressure steam to the vessel (20); evacuation means (77), (78), and (80) which evacuate the vessel (20); and heating means (24), (68), (64), and (66) which heat the organic waste (18) present in the vessel (20). The apparatus has such constitution, in which the organic waste (18) in the vessel (20) is decomposed by hydrolysis and pyrolysis and vacuum dried using those means.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: February 5, 2013
    Assignee: Kunitomo Kankyo Plant Co., Ltd.
    Inventor: Kunio Ogura
  • Patent number: 8109218
    Abstract: A process for the treatment of waste, the process comprising either a gasification step or a pyrolysis step to produce an offgas and a non-airborne, solid char material; followed by a plasma treatment step. An associated apparatus having a plasma treatment unit which is separate from the gasification unit or pyrolysis unit.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: February 7, 2012
    Assignee: Advanced Plasma Power Limited
    Inventors: Chris Chapman, David Ovens, David Deegan, Saeed Ismail
  • Patent number: 8100992
    Abstract: A biomass thermochemical gasification apparatus is provided that can manufacture high-quality fuel gas out of solid biomass in an industrial manner. This fuel gas can be used as fuel for a gas engine and a gas turbine for example and also can be used as synthesis gas for methanol synthesis. A high-temperature combustion gas generation apparatus (101) for biomass operates entirely by biomass and the heat source thereof does not depend on fossil fuel. A coarsely-ground powder biomass (205) subjected to gasification and gasification agent (303) are introduced to a primary gasification reaction room (202) and generate gasification reaction by, as reaction heat, radiation heat from a wall face of the primary gasification reaction room (202) heated by combustion gas (109a) generated in the high-temperature combustion gas generation apparatus (101) and are dissolved. Consequently, the biomass (205) is converted to clean and high-quality generated gas.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: January 24, 2012
    Assignee: Nagasaki Institute of Applied Science
    Inventors: Masayasu Sakai, Toshiyuki Takegawa, Hachiro Kawashima, Nobuaki Murakami
  • Patent number: 7658155
    Abstract: A process for the treatment of waste, the process comprising: (i) either (a) a gasification step comprising treating the waste in a gasification unit in the presence of oxygen and steam to produce an offgas and a char, or (b) a pyrolysis step comprising treating the waste in a pyrolysis unit to produce an offgas and a char; and (ii) a plasma treatment step comprising subjecting the offgas and the char to a plasma treatment in a plasma treatment unit in the presence of oxygen and, optionally, steam.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: February 9, 2010
    Assignee: Advanced Plasma Power Limited
    Inventors: Chris Chapman, David Ovens, David Deegan, Saeed Ismail
  • Patent number: 7624707
    Abstract: An over fire air (OFA) port arrangement for a pulverized coal-fired boiler or furnace has at least one OFA port through each of the sidewalls for injecting OFA to increase residence time for each burner level. Plural OFA ports may be employed, staggered both vertically and horizontally to effectively deliver over fire air to the burner flames at the appropriate time and location to most efficiently reduce the formation of fuel NOx. OFA port configurations for both single-wall and opposed-wall fired furnaces and boilers are provided.
    Type: Grant
    Filed: January 29, 2004
    Date of Patent: December 1, 2009
    Assignee: Babcock & Wilcox Power Generation Group, Inc.
    Inventor: Albert D. LaRue
  • Patent number: 7438003
    Abstract: A burning device includes a plurality of interconnected chamber walls defining a burning chamber and a central axis, each chamber wall also defining a plurality of chamber apertures. A plurality of flanges extend radially from the chamber walls and substantially parallel to the central axis, and a plurality of circumferentially extending lips extending from a respective flange. Each lip is radially spaced apart from an associated chamber wall and defines therebetween an air flow passageway communicating with the burning chamber and affording air flow into the burning chamber. Ventilation apertures are defined in at least one of the plurality of lips and the plurality of flanges, the ventilation apertures providing communication between the air flow passageways and the burning chamber. A cover is removably supported by the chamber walls and defines a plurality of apertures.
    Type: Grant
    Filed: July 20, 2005
    Date of Patent: October 21, 2008
    Inventor: Ronald R. Wilfer
  • Publication number: 20080149012
    Abstract: A method for reducing nitrogen oxide emissions of a bubbling fluidized bed boiler burning biofuel and an air distribution system for a bubbling fluidized bed boiler biofuel. A fluidized bed is arranged in a lower part of a furnace of the boiler. The bed is fluidized by fluidizing gas that includes primary air. Fuel is fed to the fluidized bed, which dries and pyrolizes into pyrolysis gas including volatile matter of the fuel. The gas rises upwards in the furnace and burns. Secondary air is supplied above the fluidized bed from secondary air nozzles, and tertiary air is supplied above the secondary air nozzles. A part of primary air is supplied in connection with fuel feeding such that the fuel is forced substantially on the surface of the fluidized bed, thus pyrolizing entirely, and at least a part of the pyrolysis gases formed in the pyrolysis is burned by primary air such that the air coefficient in relation to the volatile matter of fuel in the pyrolysis gases is in the substoichiometric area.
    Type: Application
    Filed: February 9, 2006
    Publication date: June 26, 2008
    Applicant: Metso Power OY
    Inventors: Pauli Dernjatin, Marko Fabritius, Jukka Roppanen
  • Patent number: 6938562
    Abstract: A gasification system that includes a gasification reactor chamber having perforated conduits or an inner lining that increases the exposed surface area of waste materials to gasification conditions, thereby decreasing gasification temperature, time, and cooling period between subsequent gasification procedures. After an aspirator withdraws and oxidizes fuel gas from the gasification reactor chamber, a flare assembly combusts the mixed fuel gas to provide power or heat to at least one heat recovery device. The at least one heat recovery device recaptures thermal energy entrained in the exhaust, thereby reducing exhaust temperature and eliminating the need for an exhaust stack. An absorber purifies the exhaust and an extractor removes carbon dioxide. A portion of the removed carbon dioxide may be used for industrial purposes or for supporting vegetation. At least a portion of the remaining exhaust is returned to the gasification reactor chamber as recycled process gas, thereby completing a closed-loop system.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: September 6, 2005
    Assignee: SenreQ, LLC
    Inventor: Michael G. Pope
  • Patent number: 6932001
    Abstract: A container for burning refuse including yard waste, household waste and the like. The container has a cylindrical portion that defines a burning chamber. The cylindrical portion includes a plurality of ventilation apertures and inwardly protruding flanges. The container also includes a cover supportable by the cylindrical portion to open and close the burning chamber. A pair of cross braces extends across a lower portion of the burning chamber to partially support the burnable refuse. During burning of the refuse, the flanges prevent the refuse from collecting along the inner walls of the burning chamber and define air flow passageways to improve air circulation through the chamber.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: August 23, 2005
    Inventor: Ronald R. Wilfer
  • Patent number: 6874433
    Abstract: An incinerator includes a furnace defining a combustion chamber, a feed supply, a feed-delivering conduit connected to the feed supply and the furnace, an air supply connected to the furnace, and an air distributor disposed in the combustion chamber, connected to the air supply, and having an elongated segment which is formed with a plurality of spaced apart holes for uniformly distributing air into the combustion chamber.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: April 5, 2005
    Inventor: Dai-You Lin
  • Patent number: 6815572
    Abstract: The present invention provides a method of processing organic waste (D) in divided solid and/or liquid form, the method being implemented in a single reactor (1) containing a bath of molten glass (V) surmounted by a gas phase (G), the method comprising incinerating said waste (D) in the presence of oxygen at the surface (S) of said bath of molten glass (V), and in vitrifying said incinerated waste (D) in said bath of molten glass (V). In said method, and in characteristic manner, in addition to the oxygen delivered as oxidizer into said gas phase (G), oxygen is also injected into said bath of molten glass (V) in a quantity that is sufficient to minimize or to avoid any formation of metal within said bath of glass (V); advantageously in a quantity that is sufficient to minimize or to avoid any formation of metal within said bath of glass (V) and also to subject said bath of glass (V) to moderate stirring.
    Type: Grant
    Filed: May 24, 2001
    Date of Patent: November 9, 2004
    Assignees: Korea Electric Power Corporation, Societe General pour les Techniques Nouvelles - SGN
    Inventors: Pierre Brunelot, Jacques Lacombe, Serge Merlin, Patrice Roux, Valérie Thiebaut, Kwan-Sik Choi, Myung-Jae Song
  • Patent number: 6532879
    Abstract: A solid fuel fed combustor system having a first chamber portion with an inlet feed for feeding a metered amount of a solid fuel thereto, a first burner stage having a first traveling conveyor firebelt, a metered amount of air introduced in progressively increasing proportions along the length of the first traveling conveyor. A second burner stage having a second traveling conveyor firebelt with air introduced in a progressively decreasing amount along the length of said second traveling conveyor firebelt and a controller for controlling air introduced to the system. The chamber has a sloped common roof section common to the burner stages and is made of radiative energy reflective fire brick and angled to reflect radiative energy generated from fuel traveling on the traveling conveyor firebelts and directing the radiative energy on fuel traveling on the first firebelt.
    Type: Grant
    Filed: February 4, 2002
    Date of Patent: March 18, 2003
    Assignee: Nathaniel Energy Corporation
    Inventor: Stan E. Abrams
  • Patent number: 6401636
    Abstract: A process for the incineration of particulate solids, especially biological waste matter with low caloric value, feeds the solids into a combustion chamber of a furnace together with a sub-stoichiometric amount of fresh air to control the rate of combustion and to inhibit the formation of sintered ash. The furnace for implementing the process can be a cyclone furnace having a primary combustion chamber with a first feed inlet for the solids and air and a second air inlet positioned between the first inlet and an exhaust gas outlet. A supply tube extends through the exhaust gas outlet of the primary combustion chamber to supply a source of fresh air at ambient temperature to maintain the primary combustion chamber at a desired temperature. The fresh air maintains the furnace temperature at least at about 850° C. and generally at about 850° C. to less than about 1100° C.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: June 11, 2002
    Assignee: Andritz-Patentverwaltungs-Gesellschaft mbH
    Inventors: Erwin Brunnmair, Gerhard Moosmann
  • Patent number: 6363868
    Abstract: Various smoke and combustible gas combustors (200, 300) are disclosed, and also disclosed are systems (100, 200) combining gas combustor with inventive burner. Such a burner (100 or 100′) provides combustion of a particulate fuel such as sawdust, and many types of varying moisture content biomass fuels such as poultry litter. The combustors and burners exhibit a high turndown ratio [‘TDR”].
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: April 2, 2002
    Assignee: Independant Stave Co.
    Inventors: John J. Boswell, Dale R. Eichmeyer
  • Patent number: 6321665
    Abstract: A waste management incinerator has a combustion chamber with a number of U-shaped air supply pipes protruding toward the chamber center. A number of air supply branch pipes are installed on the air supply pipes for supplying air to the combustion chamber to form a vortex-like current circulating in the combustion chamber so as to minimize imperfect combustion. Each air supply pipe is double-structured, having a water pipe connected to an air chamber with the air supply branch pipes located inside penetrating through the water pipe.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: November 27, 2001
    Assignee: Evergreen Planet SDN BHD
    Inventor: Yotaro Uchida
  • Publication number: 20010015160
    Abstract: A process for the incineration of particulate solids, especially biological waste matter with low caloric value, feeds the solids into a combustion chamber of a furnace together with a sub-stoichiometric amount of fresh air to control the rate of combustion and to inhibit the formation of sintered ash. The furnace for implementing the process can be a cyclone furnace having a primary combustion chamber with a first feed inlet for the solids and air and a second air inlet positioned between the first inlet and an exhaust gas outlet. A supply tube extends through the exhaust gas outlet of the primary combustion chamber to supply a source of fresh air at ambient temperature to maintain the primary combustion chamber at a desired temperature. The fresh air maintains the furnace temperature at least at about 850° C. and generally at about 850° C. to less than about 1100° C.
    Type: Application
    Filed: February 28, 2001
    Publication date: August 23, 2001
    Inventors: Erwin Brunnmair, Gerhard Moosmann
  • Patent number: 6230664
    Abstract: A method and an arrangement for supplying air to a fluidized bed boiler are disclosed. In the method, the air is supplied from all comers of the fluidized bed boiler substantially parallel to two opposite walls and from the middle of said walls toward the center of the fluidized bed boiler whereby the air flows cause the formation of four vortexes in the fluidized bed boiler. The arrangement comprises nozzles that blow air jets towards each other parallel to the opposite walls of the fluidized bed boiler and nozzles in the middle of the walls arranged to blow air toward the center of the fluidized bed boiler.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: May 15, 2001
    Assignee: Kvaerner Pulping Oy
    Inventors: Kauko Janka, Matti Ylitalo, Tuomo Ruohola
  • Patent number: 6216610
    Abstract: A process for the incineration of particulate solids, especially biological waste matter with low caloric value, feeds the solids into a combustion chamber of a furnace together with a sub-stoichiometric amount of fresh air to control the rate of combustion and to inhibit the formation of sintered ash. The furnace for implementing the process can be a cyclone furnace having a primary combustion chamber with a first feed inlet for the solids and air and a second air inlet positioned between the first inlet and an exhaust gas outlet. A supply tube extends through the exhaust gas outlet of the primary combustion chamber to supply a source of fresh air at ambient temperature to maintain the primary combustion chamber at a desired temperature. The fresh air maintains the furnace temperature at least at about 850° C. and generally at about 850° C. to less than about 1100° C.
    Type: Grant
    Filed: April 1, 1999
    Date of Patent: April 17, 2001
    Assignee: Andritz-Patentverwaltungs-Gesellschaft m.b.H.
    Inventors: Erwin Brunnmair, Gerhard Moosmann
  • Patent number: 6041724
    Abstract: A tower garbage incinerator is provided, consisting of an upper main blast furnace having a zigzag furnace cavity, and a lower accessory burning furnace. When garbage is fed through the inlet of the main blast furnace, the zigzag design of the furnace cavity combined with the hot upwardly flowing gas in the blast furnace, causes the garbage to drop slowly and to burn as it drops, as well. The hot gas tumbles the garbage thoroughly, so that caked garbage is completely dispersed, and thereby increases the burning area of the garbage, so as to greatly improve the burning efficiency thereof. Any residual incompletely burned garbage that drops into the accessory burning furnace is burned therein. The accessory burning furnace increases the temperature of gases entering the blast furnace.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: March 28, 2000
    Inventor: Ming Chin Hung
  • Patent number: 5954001
    Abstract: A fluidized bed reactor includes an axial recirculating fluidized bed and at least first and second lateral dense fluidized beds, respectively disposed along a first and a second wall of the jacket of the reactor. Waste is fed via at least one point on the first wall of the jacket of the reactor, above the first lateral dense fluidized bed. The reactor includes at least one duct for extracting non-fluidizable heavy elements at the base of the first lateral dense fluidized bed.
    Type: Grant
    Filed: January 29, 1997
    Date of Patent: September 21, 1999
    Assignee: GEC Alsthom Stein Industrie
    Inventor: Jean-Xavier Morin
  • Patent number: 5941184
    Abstract: A controlled thermal oxidation process for solid combustible waste. The process comprises a first combustion stage wherein the waste is burned in a downward direction from top to bottom. A first, fixed air flow of predetermined volume is passed from bottom to top of the waste. A second, modulated air flow of predetermined lesser volume is passed over the waste and through the combustion flame. The process further comprises a second combustion stage wherein products of combustion from the first stage are exposed to high temperature conditions for a short period of time under 135% to 200% overall stoichiometric air conditions.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: August 24, 1999
    Assignee: Eco Waste Solutions Inc.
    Inventors: Lucy Casacia, Barry Knowlton, Frank Sherman
  • Patent number: 5915309
    Abstract: The oblique bed wall (6) of the furnace main unit (1) is inclined in downward direction towards the ash discharge outlet (5). Oblique side walls (24R, 24L) are formed in the right and left side walls (1c, 1d) on the inlet (4) side of the furnace main unit (1), and fluidized bed material (S) blown up from the side fluid layers (RS, LS) is guided into the central fluid layer (CS). The fluidized bed material (S) is caused to circulate in succession from the central fluid layer (CS) at the inlet (4) side towards the central fluid layer (CS) at the ash discharge outlet (5) side towards side fluid layers (RS, LS) at the ash discharge outlet (5) side towards side fluid layers (RS, LS) at the inlet (4) side towards central fluid layer (CS) at the inlet (4) side, by dispersive air emitted from dispersive air pipes (21A, 21B, 25). In this way, the fluidized bed material (S) is caused to circulate in virtually a horizontal plane without partitioning walls.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: June 29, 1999
    Assignee: Hitachi Zosen Corporation
    Inventors: Seiichi Nakai, Ryozo Shiji, Takeshi Matsui, Norihiro Aoki, Yoshimasa Miura, Yusuke Okada
  • Patent number: 5799590
    Abstract: Incinerator apparatus includes a furnace and a chimney in communication with the furnace. Within the furnace, a pipe having a bore and extending upward from the bottom of the furnace is disposed. The pipe is in communication with atmospheric air at the lower end thereof and is provided with a plurality of air holes therein. The pipe also includes a top air hole at the top end thereof. The top air hole has a transverse cross-sectional area smaller than that of the bore of the pipe. External air is spontaneously introduced from the outside of the furnace and flows out through the top air hole. As air flows out of the top air hole, it is also uniformly distributed through the air holes into the furnace and garbage to be burned in said furnace.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: September 1, 1998
    Assignee: Sunny Industry Company, Limited
    Inventor: Takuya Noguchi
  • Patent number: 5791266
    Abstract: The specification describes a system for the thermal treatment of energetic materials which generate a tremendous volume of gaseous products upon combustion. The system includes a containment system which maintains an interface between hot exhaust gas products and a cooler gas, yet allows the relatively slow removal and treatment of the exhaust gas products from the containment system while permitting the inflow of gas into the containment system to replace an equivalent volume of exhaust gas products removed therefrom.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: August 11, 1998
    Assignee: International Technology Corporation
    Inventors: Jeff L. Fleming, Michael P. Barkdoll, Richard Westbrook, Chris E. McBride
  • Patent number: 5775237
    Abstract: A dry bottom ash handling system contemplates a plurality of hoppers disposed beneath a solid fuel-fired steam boiler. Each hopper includes angled walls converging at a generally rectangular opening controlled by a grate door. Air inlets are provided at intersections between adjacent angled walls to (1) facilitate combustion of unburned fuel in the storage hopper, and (2) facilitate flow of ash through the hopper opening. Ash flowing through the hopper opening enters a crusher and is then conveyed via a vacuum line to a point of disposal including a mobile tank truck that receives heavier ash particles and allows bypassing of lighter particles to a silo.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: July 7, 1998
    Assignees: Florida Power Corporation, United Conveyor Corporation
    Inventors: William P. Reilly, John S. Tomaszek
  • Patent number: 5771817
    Abstract: A recovery boiler for combusting spent liquor from cellulose cooking while at the same time recovering chemicals. The recovery boiler is constructed for so-called "rotafire" combustion and the speed of rotation of the secondary air has been increased by a constriction of the boiler being arranged at the tertiary air level. The invention also includes a process for using the boiler which is based on certain ports through which the secondary air is blown in being provided with air which is at a higher pressure than that at the other ports on the same level, thereby achieving a higher inflow velocity than from the other ports.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: June 30, 1998
    Assignee: Kvaerner Pulping AB
    Inventors: Lars Olausson, Jan Bergman, Sven-Erik Jansson, Agneta Larsson
  • Patent number: 5769008
    Abstract: The low-emission swirling-type furnace is designed to burn organic fuel and it can be most advantegeously used for dust combustion.A low-emission swirling-type furnace, according to the invention, comprises a combustion chamber (1) with a prismatic dry-bottom hopper (5) having a slot mouth, and an undergrate blast inlet means (7) disposed thereunder. The furnace includes at least one burner (2) formed by at least a pair of ducts (2a,2b ) lying one above the other and intended for supplying the air-fuel mixture. The ducts (2a, 2b) are each provided with a device (3, 4) for controlling the "air/fuel" ratio, ensuring such a ratio between the amount of air and the amount of fuel in each of the ducts (2a,2b ) that for the overlying duct (2a), this ratio turns out to be invariably higher than for the underlying duct (2b).
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: June 23, 1998
    Assignee: Maloe Gosudarstvennoe Vnedrencheskoe Predpriyatie "Politekhenergo"
    Inventors: Felix Zalmanovich Finker, Javad Berovich Akhmedov, Igor Borisovich Kubishkin, Czeslaw Sobczuk, Jan Swirski, Mark Semenovich Glazman
  • Patent number: 5752452
    Abstract: An improved apparatus and method for efficiently processing material, e.g. incinerating waste material, particularly dewatered waste water sludge, in a multiple hearth furnace by injecting high velocity jets of oxygen into the heating or drying zone of the furnace to augment turbulent gas-phase mixing, to aid in the burnout of carbon monoxide and hydrocarbons in the gas phase to achieve lower emissions, to increase convection over the drying sludge to increase its drying rate, and to ignite the drying sludge to further increase its drying rate. The apparatus and method provides an increase in sludge throughput and a reduction in carbon monoxide, nitrogen oxides and hydrocarbon emissions.
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: May 19, 1998
    Assignee: Praxair Technology, Inc.
    Inventor: Christopher Brian Leger
  • Patent number: 5724895
    Abstract: This invention is directed to an arrangement and a device for distribution of oxygen-containing gas (air) in a furnace, into which fuel is supplied as solid or fluid particles (1). The fuel consists of e.g. spent liquor from the pulp industry. Said liquor burns partly as char (2) on the floor (3), and partly as suspended particles and as volatiles. Horizontal rows of gas jets (4) activate the char burning on the floor. Vertically extended configuration of gas jets (5) higher up induces strong horizontal gas circulation but reduces vertical flow extremes. The improved horizontal mixing increases burning stability, capacity and energy efficiency, but reduces emission of SO.sub.x, NO.sub.x and TRS. Lowered vertical recirculation permits better concentration of burning in the lower furnace and less carry-over of fuel particles.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: March 10, 1998
    Assignee: Oy Polyrec AB
    Inventor: Erik Uppstu
  • Patent number: 5678494
    Abstract: A biomass-fueled furnace for residential or institutional space and hot water heating. Wood chips, the preferred fuel, are purchased "green and/or wet" and are stored in a dryer/storage assembly which uses waste clean exhaust gases produced by the furnace to dry them. Wood chips are fed via gravity to the primary combustion chamber where, via pyrolysis, they are burned. A thimble combustor eliminates radiant heat loss from the primary pyrolysis zone, allowing stable pyrolysis at low burning rates. A second combustion chamber fed with pre-heated air completely oxidizes pyrolysis gases. This furnace is capable of operating continuously at extremely low fuel consumption rates so that heat release can be regulated by thermostat in the same manner as conventional gas and oil fired furnaces. A combination of fuel drying plus secondary air preheating by the secondary flame allows stable operation at extremely low or "idle" fuel rates.
    Type: Grant
    Filed: March 22, 1995
    Date of Patent: October 21, 1997
    Inventor: Gael Ulrich
  • Patent number: 5664504
    Abstract: A combustion apparatus includes a combustion chamber having a bottom portion, and a blower for supplying air. An air blowing section is provided at a lower portion of the combustion chamber and blows out the air supplied from the blower toward the bottom portion. As a result, air is moved toward the bottom portion in the center portion of the lower portion of the combustion chamber in a radius direction and combustion gas rises upwardly along a wall of the combustion chamber. Therefore, a maximum combustion temperature portion is confined in the vicinity of the bottom portion by a forced air flow. Also, the combustion temperature in the lower portion of the combustion apparatus is high and that in the upper portion thereof is low. That is, the combustion temperature distribution is inverted, compared to that in the conventional combustion apparatus.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: September 9, 1997
    Inventor: Shizuo Kobayashi
  • Patent number: 5566625
    Abstract: High temperature combustion apparatus incorporating a pneumatically suspended combustion zone and capable of supporting relatively high combustion temperatures, in excess of 2400.degree. C. (4352.degree. F.) for essentially total combustion with minimal pollutant production. The combustion apparatus may be employed for waste material incineration in general, toxic waste incineration, and for smokeless burning of wood and vegetation. The combustion apparatus may be employed in an efficient steam electric power generating plant which employs municipal solid waste as fuel, and/or in combination with a magnetohydrodynamic (MHD) electric generator. The pneumatically suspended combustion zone is created by having streams of combustion air directed upwardly from a floor grate and from the sides of a combustion chamber such that combustion occurs in a swirling turbulent mass which does not directly contact either the walls or the floor of the combustion chamber.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: October 22, 1996
    Inventor: Bob W. Young
  • Patent number: 5535685
    Abstract: An incinerator for carrying out incineration of general or specific waste dry distillation, which can improve wastes incineration efficiency and prevent secondary pollution, such as a gas smell, by performing complete combustion by facilitating feeding of waste and discharging of ash under a condition that the furnace maintained sealed like for a conventional dry distillation incineration furnace. The incinerator is provided to feed waste introduced into a waste placing tube to a dry distillation incineration furnace by repeatedly pressing the waste, to discharge ash heaped on the bottom of the dry distillation incineration furnace by dropping into an ash placing tube with a discharge blade and pressing the dropped ash with a pressing plate, and to incinerate specific waste with high moist contents and waste wire using an indirect dry distillation tank accommodated in a combustion tank.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: July 16, 1996
    Assignee: Dae Hwan Co., Ltd.
    Inventor: Mu-Hung Choi
  • Patent number: 5451738
    Abstract: For disposal of waste material including water, volatile components and vitrifiable components, the waste material is heated in a dehydrator to remove the water, heated in a high-temperature dryer to vaporize hydrocarbon liquids, and then fed to the focus point of a primary plasma reactor where plasma arc jets are focused on the surface of a pool of the vitrifiable components. At the focus point the vitrifiable components are melted, and the volatile components are volatized. The melted vitrifiable components are received in a quench chamber where they solidify on a quench roller and are broken into chips and delivered to a receiving area. Heat from the quench chamber is transferred to the dehydrator and high-temperature dryer. The hydrocarbon liquids and volatized components are fed to a secondary plasma reactor where they are disassociated into their elemental components.
    Type: Grant
    Filed: May 25, 1993
    Date of Patent: September 19, 1995
    Assignee: Itex Enterprises Services, Inc.
    Inventors: Obaid U. Alvi, Irfan A. Toor
  • Patent number: 5408942
    Abstract: High temperature combustion apparatus incorporating a pneumatically suspended combustion zone and capable of supporting relatively high combustion temperatures, in excess of 2400.degree. C. (4352.degree. F.) for essentially total combustion with minimal pollutant production. The combustion apparatus may be employed for waste material incineration in general, toxic waste incineration, and for smokeless burning of wood and vegetation. The combustion apparatus may be employed in an efficient steam electric power generating plant which employs municipal solid waste as fuel, and/or in combination with a magnetohydrodynamic (MHD) electric generator. The pneumatically suspended combustion zone is created by having streams of combustion air directed upwardly from a floor grate and from the sides of a combustion chamber such that combustion occurs in a swirling turbulent mass which does not directly contact either the walls or the floor of the combustion chamber.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: April 25, 1995
    Inventor: Bob W. Young
  • Patent number: 5357879
    Abstract: In a dried sludge melting furnace apparatus, at least one of following two controls is executed. In one of the controls, the primary combustion chamber (PCC) upper combustion air supply amount and the PCC lower combustion air supply amount are adjusted so as to respectively become a target PCC upper combustion air supply amount and a target PCC lower combustion air supply amount which are obtained from an inferred PCC upper combustion air supply amount and an inferred PCC lower combustion air supply amount. The inferred PCC upper and lower combustion air supply amounts are obtained by a fuzzy inference device (221). In the other control, the total combustion air supply amount and the second combustion chamber (SCC) burner fuel supply amount are adjusted so as to respectively become a target combustion air supply amount and a target SCC burner fuel supply amount which are obtained from an inferred combustion air supply amount and an inferred SCC burner fuel supply amount.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: October 25, 1994
    Assignee: Ebara-Infilco Co., Ltd.
    Inventors: Shunichi Shiono, Kazuyuki Suzuki
  • Patent number: 5311828
    Abstract: An incinerator includes a furnace body which confines a combustion chamber for receiving refuse therein and which has a bottom wall formed with a central opening, an ash release gate mounted pivotally to the bottom wall at the central opening, a stack which is provided on one side of the furnace body and which has a lower end part that is communicated with the combustion chamber adjacent to the bottom wall, and an exhaust port provided adjacent to an open top of the furnace body and operable so as to communicate the stack and the combustion chamber. A furnace cover is provided on the open top of the furnace body. First and second preheating tube arrangements are received in the lower part of the furnace body. The first preheating tube arrangement includes a plurality of upwardly extending concentric coil turns and has a surface formed with a plurality of air holes.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: May 17, 1994
    Inventors: I-Cheng Wu, Guor-Rern Wu
  • Patent number: 5269287
    Abstract: A furnace grate for use in a combustion furnace includes rows of grate bars positioned one behind the other, moveable and stationary grate bar supports, side plates, drive shafts and fluid cylinders. The grate bars are seated on the grate bar supports within the furnace while the fluid cylinders are positioned outside the furnace wall.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: December 14, 1993
    Assignee: Noell K&K Abfalltechnik GmbH
    Inventor: Friedrich Krieger
  • Patent number: 5245936
    Abstract: An incinerator of sectional structure has an airpipe for sending combustion air into a furnace. The airpipe is a straight pipe tapered off at end portion and closed by a plug of castable refractory material filled up in the tapered portion to improve the durability under high temperature circumstances. The airpipe is also inserted into a furnace through a hole opened on an upper furnace wall, and a seal member of easy spallable and castable refractory material fills up the gap between the airpipe and the hole to make easy exchange of the airpipe possible.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: September 21, 1993
    Inventor: Susumu Nakata
  • Patent number: 4771709
    Abstract: Disclosed is an air supply apparatus for open pit incineration for supplying a curtain or layer of combustion air into an open pit. A plenum is provided for being positioned alongside of the pit and a fan and conduit provide air to the plenum. An elongate nozzle directs air from the plenum into the pit in a curtain or layer. Means are provided for selectively exhausting air from the conduit to adjust the volume of air being directed by the nozzle into the pit. Also disclosed is a secondary air supply for air curtain incineration in permanent or semi-permanent pits having walls provided by refractory panels. The plenum and nozzle are positioned adjacent one wall to direct the air curtain so that it primarily impinges upon an opposite wall. The secondary air supply introduces air into the pit at the wall adjacent to the plenum.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: September 20, 1988
    Inventor: William G. Applegate
  • Patent number: 4712491
    Abstract: The downward burning of a vertical stack of solid fuel in a vertical furnace shaft is controlled by supplying most of the combustion air to the side of the stack through vertically spaced apart rows of combustion air supply openings in the vertical furnace shaft, each row of combustion air supply openings being generally horizontally oriented and including a plurality of separate openings. Each row of combustion air supply openings is supplied with combustion air through a separate combustion air supply channel, and the combination air fed to each supply channel is controlled by a distribution element which shifts the supply of combustion air to lower rows of air supply openings as the combustion zone moves down to the bottom of the vertical stack.
    Type: Grant
    Filed: March 5, 1986
    Date of Patent: December 15, 1987
    Assignee: Wamsler-Herd-Und Ofen GmbH
    Inventor: Lothar Schmidt
  • Patent number: 4702179
    Abstract: This invention relates to a method and apparatus for controlling the burn of coal, or fuel to produce the desired output of heat ranging from under 10,000 BTU per hour to over 150,000 BTU per hour, and the collection of said heat. It depends on the sizing of the grate, firebox and combustion area to produce the desired burn, the vertical exhaust pipes and soot and ash traps for self-cleaning and storing waste, the automatic controls for self-maintenance, the air washing system for cleaning the exhaust air of pollutants, the water heating coils and tanks for storing the produced heat, the chimney insulated compartments with gravel for accelerating heat absorption, and its own chimney that makes it a self-contained unit that can be located for use inside or outside of most any selected existing house or building.
    Type: Grant
    Filed: April 18, 1984
    Date of Patent: October 27, 1987
    Assignee: Temperature Adjusters, Inc.
    Inventor: Henry T. Childs
  • Patent number: 4676175
    Abstract: Incinerator furnace for incinerating organic substances, especially compounds which contain radioactive actinides in chemically bound form or are contaminated with chemical compounds, having an incinerating chamber which has a feed opening for oxygen-containing gas, a discharge opening for exhaust gas, and a filter body of the exhaust gas stream. The filter body is cup-shaped, and is arranged with its opening at the feed opening for oxygen-containing gas. The filter body on the side facing the feed opening for oxygen-containing gas forms a receiving space for the organic substances.
    Type: Grant
    Filed: October 18, 1985
    Date of Patent: June 30, 1987
    Assignee: Alkem GmbH
    Inventors: Friedrich-Wilhelm Ledebrink, Karl-Rupprecht Link
  • Patent number: 4538529
    Abstract: A garbage incinerator comprises a combustion grate, a passage for feeding garbage to be combusted onto the grate, a combustion chamber above the grate, and a flue communicating with the combustion chamber and projecting upwardly therefrom. A nozzle box supplied by a separate blower with compressed air is arranged in the region of the flue and provided with a plurality of nozzles oriented to direct air streams at high speed in at least two directions transverse to each other into the stream of flue gas passing through the flue. Preferably, some of the nozzles are oriented to direct air streams substantially parallel to the wall of the flue, whereas other nozzles are oriented to provide air streams which extend transverse to the direction of the first-mentioned air streams.
    Type: Grant
    Filed: July 12, 1984
    Date of Patent: September 3, 1985
    Assignee: Vereinigte Kesselwerke AG
    Inventor: Sedat Temelli
  • Patent number: 4502464
    Abstract: This invention is for a stove having a cylindrical body with holes circumferentially disposed on the sides thereof and which holes gradually increase in number and in size towards the top thereof. The cylindrical body has an open top and a bottom wall and supported by legs at the bottom thereof. Disposed within the cylindrical body and spaced from the bottom wall are vertically spaced apart plates, the upper of said plates being perforated and both plates are connected to a central downwardly extending short cylinder communicating with the space above the bottom wall which has primary inlet openings with an adjustable rotatable plate for opening said primary inlet opening. Resting on the short cylinder is the vertical cylindrical screen, and at the top of said cylindrical body is a cover which has a flame opening defined by a short upwardly and downwardly protruding short cylinder. At the bottom of said cover is suspended a fuel top shield with a central opening.
    Type: Grant
    Filed: February 8, 1984
    Date of Patent: March 5, 1985
    Inventor: Alberto A. Figueroa
  • Patent number: 4449460
    Abstract: Freshly harvested agricultural materials having a moisture content no greater than 45% by weight are burned in a furnace in which the housing thereof is divided into preburning and afterburning spaces by a baffle wall. The preburning space contains a horizontally arranged first grating adjacent the baffle wall and a second grating adjacent the first and inclined upwardly therefrom and juxtaposed with an inlet in the housing for the introduction at a constant rate of the materials onto the inclined grating, the upper portion of which is fed by a first portion of primary air for the removal of moisture from the materials, while a lower portion of the inclined grating is fed with a second portion of primary air for the air-deficient burning of the dried materials and the production of combustible gases.
    Type: Grant
    Filed: March 16, 1982
    Date of Patent: May 22, 1984
    Assignee: Lang Gepgyar
    Inventors: Batyi Bela, Gulyas Geza, Bozso Zoltan, Csakany Istvan, Bartucz Janos