Oscillatory Patents (Class 110/278)
  • Patent number: 7921786
    Abstract: The invention includes a grate system for a boiler. The grate system includes a grate unit and a side header guard. The grate unit supports fuel during combustion thereof, and has an upper surface, a lower surface, and upturned lateral edges. The side header guard is arranged along a side wall of the boiler and has upwardly and downwardly projecting fin portions. The upwardly projecting fin portion is adapted and configured to extend over and protect the boiler side wall from abrasion by fuel. The downwardly projecting fin portion is adapted and configured to extend over the upturned lateral edge of the grate unit, inhibiting passage of fuel therebetween.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: April 12, 2011
    Assignee: Riley Power Inc.
    Inventors: John Sund, Larry Pace, Kevin Toupin
  • Patent number: 6332410
    Abstract: The invention relates to a grate for incineration plants for the incineration of combustible material, in particular refuse, comprising at least one grate track, which is composed of fixed and movable grate-lining rows, which are arranged alternately in the direction of flow of the combustible material and have a number of grate-lining units lying side by side, the grate-lining units being connected in the region of their rear end to fixed and movable grate-lining carriers respectively and moving with their front end on or over the following grate-lining unit, and a drive being assigned to the movable grate-lining units, which drive has a torsion bar led out of the underblast region.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: December 25, 2001
    Assignee: Alstom
    Inventors: Friedrich Freiermuth, Max Künzli
  • Patent number: 6221329
    Abstract: A process and system for the recovery of desirable constituent materials from vehicle tire pieces through pyrolysis. The system includes a pyrolysis section that is divided into a plurality of individual heating zones. Each of the heating zones is heated to a distinct operating temperature that is independent from the operating temperature of the remaining heating zones. Vehicle tire pieces are fed into the infeed end of the pyrolysis section by a rotatable feed cylinder that includes a screw-like flight extending from the inner wall of the feed cylinder. As the feed cylinder rotates, the flight directs the supply of vehicle tire pieces into the infeed end of the pyrolysis section. The pyrolysis section includes a rotary kiln that is divided into the plurality of heating zones.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: April 24, 2001
    Assignee: Svedala Industries, Inc.
    Inventors: Bobby P. Faulkner, Robert J. Unterweger, Roy W. Hansen
  • Patent number: 6213031
    Abstract: To cool a grate having alternately fixed and movable rows (1, 1′) of grate bars (2), cooling liquid is sprayed into cavities (7), open at the bottom, of the grate bars (2) from spray tubes (10) situated in the underblast region (8) and in the process vaporizes essentially completely, so that the heat of vaporization is extracted from the grate bars (2). The angle sector (12) into which the cooling liquid is sprayed may be set in such a way that in each case only those sections of the grate bars (2) whose top sides form the free surface of the grate are sprayed. The cavities may also be closed except for a discharge opening leading into the underblast region and may be connected to a supply reservoir, in which the liquid is kept at a constant level, which is just below the discharge openings.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: April 10, 2001
    Assignee: Asea Brown Boveri AG
    Inventors: Max Künzli, John Millard, Peter Serck-Hanssen
  • Patent number: 5671687
    Abstract: An incinerator comprises a feeding plate, a first combustion chamber, a second combustion chamber, a curved duct, an air exhausting device, a water screen device, and a water tank. The feeding plate is provided on the underside thereof with a vibrating device for causing the feeding plate to vibrate so as to move trash gradually into the first combustion chamber in which trash is incinerated to produce ash and exhaust fume which is then burned completely in the second combustion chamber. When the exhaust fume is passed through the water screen located in the curved duct, ash contained in the exhaust fume is washed away and deposited in the water tank which is provided therein with a device for removing ash that is deposited in the water tank.
    Type: Grant
    Filed: June 16, 1995
    Date of Patent: September 30, 1997
    Inventor: Chwan Yuh Chen
  • Patent number: 5497711
    Abstract: Improved grate plates are designed to produce multiple eddy currents in the absence of clinker and to provide even greater air distribution when overlaid by clinker. Each grate plate has a plurality of upwardly flaring wells which open to the upper surface on which the clinker bed is supported. Within each well is at least one semi-annular slot providing ingress for cooling air from a remote source. The slot extends only partially around the wall of the well such that air is injected into the well somewhat tangentially to the flaring surface to induce cyclonic motion of the air which is enhanced by the flared conic walls of the wells. Accordingly, the energy imparted the air by injection is diminished by the rotational energy dissipated and the cooling air's initial vertical component of velocity is diminished.
    Type: Grant
    Filed: April 20, 1995
    Date of Patent: March 12, 1996
    Assignee: Southern Alloy Corporation
    Inventor: Billy T. Bobbitt
  • Patent number: 5235921
    Abstract: The present invention is a combustion chamber for an incinerator that has a chamber with a plurality of refractory walls and an opening for the delivery of materials into the chamber. A hearth is contained within the chamber. The hearth has a surface for the receipt of these materials and is positioned generally adjacent to the opening. An oscillator is connected to the hearth for causing the hearth to oscillate within the chamber. An air plenum is arranged beneath the hearth. The hearth has a first and second flange extending upwardly along each side of the hearth. A third flange extends upwardly at the end of the hearth adjacent to the chamber opening. The hearth has a plurality of air passageways extending therethrough and communicating with the air plenum. A collection ridge is formed about one edge of the hearth. A suitable heat exchange fluid circulating system is provided within the hearth so as to pass a fluid and heat exchange relationship with the hearth.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: August 17, 1993
    Assignee: Dunham Environmental Services, Inc.
    Inventor: Richard M. Dunham
  • Patent number: 4981090
    Abstract: A movable grate comprising a number of grate steps which are arranged adjacent each other, partly overlap one another and are pivotable around an axis extending in the longitudinal direction of said grate step, and which are pivotably mounted outside shield members (7, 10) which in lateral direction enclose a combustion chamber, end plates (5) being rigidly secured to the ends of the grate steps and swingable therewith, the end plates being aligned with and fitted in openings in the shield members. The novel matter of the invention resides in that portions (10) of the shield members having such openings aligned with the end plates (5), are displaceably mounted relative to adjoining shield members (7) in the direction of the grate step axis, and that the shield portions (10) which outwardly sealingly engage adjoining shield members (7) and inwardly sealingly engage the end plates (5), are in the direction of said axis rigidly secured to the grate step shaft.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: January 1, 1991
    Assignee: B & S Miljoteknik A/S
    Inventor: Hans B. Andersen
  • Patent number: 4744311
    Abstract: A new and improved system for feeding solid particulate material such as refuse derived fuel for burning in a combustion reactor vessel such as a boiler includes a fuel injector chute having a lower end for directing a flow of said solid particulate material into the vessel and an upper end for receiving a flow of said material. A feeder is provided having a discharge end for delivering a continuous controllable flow of said material to the inlet of the injector chute and a plurality of separate, spaced apart, vibratory feed hoppers are mounted above the feeder to supply the feeder with a steady flow of material from one or both hoppers. Each hopper is adapted for holding a reservoir or supply of said solid particulate material and is selectively controllable to provide a steady flow of solid particulate material into the feeder for delivery through the injector chute to the combustion reactor vessel.
    Type: Grant
    Filed: May 27, 1987
    Date of Patent: May 17, 1988
    Assignee: Riley Stoker Corporation
    Inventor: Stanley J. Piekos
  • Patent number: 4665840
    Abstract: An improvement for use in a mechanical stoker with a coal stove is disclosed. The improvement device is used with a stoker, generally including a hopper, operatively connected to a small stove having a fire box forming an ash pit. The fire box, through its sides sloping downward from the hopper, supports a ramp. The lower portion of the ramp is a perforated fire grate, while the upper portion is a plate that extends through the hopper bottom and into the stove. A fan effecting a forced draft through the grate is operatively connected to a fan motor. The improvement comprises a wiper bar which overlies generally the width of the plate. The wiper bar oscillates about the longitudinal center line of the plate to feed coal or other solid fuels from the hopper onto the grate. The oscillation of the wiper bar is effected by eccentric connection to a gear motor.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: May 19, 1987
    Inventor: Garrett D. Yarnell
  • Patent number: 4600098
    Abstract: A grate plate and a combination of a grate plate and support apparatus for a reciprocating grate type material transport apparatus. The support apparatus includes spaced apart forward posts having an interconnecting transverse bar and spaced apart rearward posts having an interconnecting transverse bar. The grates include a transverse lower rib with a protrusion which permits the grate to be secured to the forward posts. The grate includes downwardly extending wings along each side. The rear end of each wing includes a detent that cooperate with the bar interconnecting the rear posts. Protrusions in the midsection of the grate rest on the forward posts. Each grate is thus supported at four points.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: July 15, 1986
    Assignee: Fuller Company
    Inventor: David R. N. Orren
  • Patent number: 4586442
    Abstract: A gas generator for generating combustible gases from biomass material comprising an enclosure within which is mounted an inclined support intermediate the top and bottom such as to define a gas generating chamber above the support and a plenum chamber below the support, a feed conductor at the top of the enclosure through which biomass material is delivered to the upper end of the support, a discharge conductor at the top of the enclosure through which gas generated within the chamber is discharged and a conductor at the bottom for delivering primary air to the underside of the support, the support being characterized in that it is comprised of a plurality of hollow metal tubes, the longitudinal axis of which partake of the inclination of the support, linkage including a crank for effecting oscillation of the tubes about their longitudinal axis, a blower arranged to deliver cooling air to the lower ends of the tubes, a vent chamber at the upper ends of the tubes for discharging air therefrom, a blower for su
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: May 6, 1986
    Assignee: New Hampshire Flakeboard
    Inventor: Robert A. Caughey
  • Patent number: 4563959
    Abstract: The present invention relates to a step type stoker with an oscillation mechanism having: a plurality of stoker frames (2 and 2') which are installed at an interval in the upstream to downstream direction, and at least one of which forms an air supply path (5); reciprocating fire grates (3) each of which is formed with a plurality of fire grate members (8) installed in a step-like manner on a groove-shaped frame (7) equipped with an air path (6) which is in communication with the aforementioned air supply path (5) at all times; and fixed fire grates (4) each of which is formed with a plurality of fire grate members 8 installed in a step-like manner on a groove-shaped frame (7) equipped with an air path (6) which is in communication with the aforementioned air supply path (5) at all times. The fixed fire grates are arranged to be adjacent to and parallel with the aforementioned movable fire grates (3), but are fixed on the aforementioned stoker frames (2 and 2').
    Type: Grant
    Filed: November 21, 1984
    Date of Patent: January 14, 1986
    Assignee: Kabushiki Kaisha Takuma
    Inventor: Koji Fujiwara
  • Patent number: 4491077
    Abstract: The invention relates to vibrating hearth burners. Three problems exist in known such burners, these being uniformity of fuel combustion; ash discharge; and over-heating of the grate. To meet the first of these, the present invention provides a burner in which the grate (30) and the vibrating mechanism (10,16) cooperate to decelerate the movement of fuel along the grate (30) as it travels towards the discharge end. This results in a build-up of ash towards the discharge end providing a substantially uniform thickness of fuel/ash on the grate (30), and a substantially uniform pressure drop across the grate (30). The provision of an ignition grate (32) is also contemplated to ensure that the fuel is ignited at the delivery end of the grate (30). To meet the second, the invention contemplates the provision of an ash return chute (54) incorporated in the vibrating grate assembly (8).
    Type: Grant
    Filed: August 18, 1981
    Date of Patent: January 1, 1985
    Assignee: Richardsons Westgarth & Co., Ltd.
    Inventors: Michael H. Petty, Kenneth Tidd
  • Patent number: 4463688
    Abstract: An improved grate block includes a blow-out channel terminating at a blow-out opening through the face of the block, the opening having pre-determined dimensional relationships with respect to the size of the front face of the block. The ratio of the width to the height of the front face is smaller than the ratio of the width to the height of the blow-out opening, and one-half the area of the front face is between 20 and 40 times larger than the cross-sectional area of each blow-out opening. Additionally, the blow-out openings are arranged above the horizontal center line and laterally spaced from the vertical center line through the front face, the channel sloping at an angle relative to the upper surface of the grate block which lies between about 15.degree. and about 25.degree..
    Type: Grant
    Filed: April 15, 1983
    Date of Patent: August 7, 1984
    Assignee: Von Roll AG.
    Inventor: Bruno Andreoli
  • Patent number: 4254715
    Abstract: A primary combustion chamber is located above a secondary combustion chamber with a support grate between the two for supporting particulate solid waste fuel to be burned efficiently. Primary air is introduced to the primary combustion chamber with secondary air introduced below the grate into a combustion gas flow to cause complete burning in the secondary combustion chamber. A brick wall screen means of high temperature, corrosion-resistant brick forms the secondary combustion chamber to allow exhaust gaseous product to exit therethrough while screening out ash which can be removed from the combustion area. The gaseous product passed through the screen is then passed to a heat exchanger to utilize part of the heat produced for heating primary and secondary air used in the combustor. The exhaust gas from the heat exchanger can then be put to use in a boiler or other energy producing device.
    Type: Grant
    Filed: November 15, 1978
    Date of Patent: March 10, 1981
    Assignee: Hague International
    Inventors: Paul G. LaHaye, John W. Bjerklie, Ivan G. Most, Kenneth G. Hagen
  • Patent number: 4250818
    Abstract: A vibration bed (1) is assembled together of a plurality of rigidly connected frames (2) extending in the feed direction (A) of the material to be burned. The frames have projecting sides (10) extending downwardly and in the feed direction. Two effectively synchronously driven vibration generator arrays (12, 13) are located on the downwardly extending projection or extensions, each one of the arrays (12, 13) has a plurality of axially serially arranged vibrators (7); preferably, every other frame has a vibrator associated therewith, and the number of frames is odd, the vibrators of one group being connected by a continuous shaft, energized by a drive from the axial ends.
    Type: Grant
    Filed: July 14, 1978
    Date of Patent: February 17, 1981
    Assignee: Carl Schenck AG
    Inventor: Conrad Sigg