Patents Assigned to C. Otto & Comp. G.m.b.H.
  • Patent number: 4113570
    Abstract: Vertical heating flues between adjacent coke oven chambers include rich-gas burners extending essentially to progressively increasing elevations in the flues in a manner such that the burner exit zones increase from flue-to-flue to a maximum elevation at the pusher side of each oven chamber. At the pusher side, the coke oven chamber has a minimum width which increases to a maximum width at the coke side where the rich-gas burners have exit zones at the lowest elevation in the heating flues. Such a rich-gas burner arrangement may additionally include rich-gas burners with exit zones at the soles of alternate heating flues while the remaining heating flues contain the burners extended to progressively increasing elevations. When the coke oven chambers are heated by twin-heating flues, the rich-gas burners extend vertically from the soles of only one heating flue in each of the twin-heating flues.
    Type: Grant
    Filed: December 3, 1976
    Date of Patent: September 12, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Erich Pries
  • Patent number: 4111758
    Abstract: Gas-flow resistance elements are incorporated in each of the rich-gas distribution lines, the lean-gas distribution ducts and the smoke-gas ducts forming part of a battery of coke ovens. The flow resistance elements are employed to insure uniform and adequate distribution of combustion media along the individual rows of heating flues of the coke oven battery. Substantially identical gas-flow resistance elements in the rich-gas distribution lines reduce the flow of rich-gas by an amount which is greater than 50 mmWG whereby, for example, a rich-gas head pressure of 120 mmWG is reduced to approximately 70 mmWG. Substantially identical gas-flow resistance elements in the lean-gas distribution branch ducts reduce the lean-gas pressure therein by an amount greater than 100 mmWG. Substantially identical gas-flow resistance elements in the smoke-gas ducts reduce the flow of smoke-gas therein by an amount corresponding to a loss of head pressure which is greater than 15 mmWG.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: September 5, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Folkard Wackerbarth
  • Patent number: 4102674
    Abstract: Iron ore pellets on a grid in a treatment chamber are hardened by contact with a heat treated, low calorific gas. The gas is generated in the gasification chamber of a slag bath generator. The generator receives a gasification agent and solid fuel that preferably further includes sulfur-binding materials, such as dolomite for generating a stream of low calorific gas. Inclined water-cooled pipes at the upper end of the slag bath generator extract liquid slag from the gas stream. The slag drips from the pipes into the slag bath generator. A mixing chamber receives the gas at a temperature of about 1450.degree. C passed beyond the inclined water-cooled pipes together with an air supply for heat treating the gas to a temperature of about 1100.degree. C. The heat treated gas is then passed into the treatment chamber for hardening the iron ore pellets contained therein.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: July 25, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Kurt Osterloh, Karl Peter, Paul Gernhardt, Wolfgang Grams, Christian Hundeshagen, Wilhelm Danguillier, Siegfried Pohl
  • Patent number: 4099554
    Abstract: A control system for a pressure vessel receiving a flow of hot rare gas, such as helium, from a nuclear reactor. The control system includes a thermocouple supported on the vessel wall within an airgap formed by an outwardly-spaced layer of insulation. An aperture in the bottom of the layer of insulation feeds air into the airgap. Air is withdrawn through an aperture in the top of the layer of insulation and passed along a conduit containing a control valve, and thence, through a motor controlled blower to a chimney. A controller receives the signal from the thermocouple for adjusting the control valve to both maintain a small continuous airflow and adjustably control the flow of air delivered by the conduit line to the chimney. The controller also controls the motor-driven blower. The flow of helium through the pressure vessel is detected to provide an output signal for controllably varying the operation of the blower.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: July 11, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Egon Haese
  • Patent number: 4098324
    Abstract: A system for cooling high-temperature gasifiers and method for its operation wherein cooling conduits extend vertically through the walls of the gasifier and are connected at their ends to a closed-water circulation system which incorporates heat exchangers for removing heat from the system. Boiling in the system is prevented, and good heat transfer characteristics are achieved, by maintaining a high pressure system, at least 40 bar, coupled with a flow velocity of between 5 and 7 meters per second at a maximum internal diameter of the cooling conduits of 51 millimeters. Means are provided for maintaining the temperature of the water exiting from the cooling conduits at least 10.degree. C below the boiling point at the pressure and flow rate of the system.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: July 4, 1978
    Assignees: Dr. C. Otto & Comp. G.m.b.H., Saarbergwerke A.G.
    Inventors: Joachim Kummel, Heinz Dressen, Wilhelm Danguillier, Paul Gernhardt, Wolfgang Grams, Siegfried Pohl
  • Patent number: 4097340
    Abstract: Apparatus for cleaning incrusted deposits from the regions of coke oven doors between a central refractory sealing plug and a surrounding sealing edge or strip with the use of two pairs of nozzles carried on the upper and lower ends of a frame which can traverse the inner end of the door on which the sealing plug is carried. The frame has a length preferably one-half the height of the door such that the upper nozzles will clean the upper half of the door while the lower nozzles clean the lower half. The nozzles are pivotally carried on the frame such that they can be actuated to clean the horizontally-extending portions of the door between the sealing plug and the sealing strip at the upper and lower extremities of the door.
    Type: Grant
    Filed: August 24, 1977
    Date of Patent: June 27, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Erich Pries
  • Patent number: 4093519
    Abstract: In the cellar located below an underjet-type of battery of coke ovens are gas distribution pipes. A gas dispensing nozzle is located within each of the separate pipes which extend from a distribution pipe through the regenerators into the burners for a row of heating flues between two coking chambers. These nozzles are cleaned by injecting compressed air from a pipeline that extends parallel to the rich gas distribution pipe. A nipple opposite each nozzle interconnects the air pipeline and the gas pipe. The nipple receives a plug having either an orifice or a nozzle tube to direct compressed air toward the gas dispensing nozzle. A supply header for compressed air extends along the battery of coke ovens and this header is connected by a valve to each compressed air pipeline in the cellar. A controller responsive to a timer operates the valves during regenerative heating reversals for periodic cleaning of the gas dispensing nozzles with compressed air.
    Type: Grant
    Filed: August 7, 1975
    Date of Patent: June 6, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Erich Pries
  • Patent number: 4083695
    Abstract: A tube-type reactor includes a reactor shell surrounding a bundle of vertically-arranged jacketed tube assemblies. An equilateral triangle is formed by lines interconnecting the central axes of the three jacketed tube assemblies in mutual contact. Each jacketed tube assembly includes a reactor tube forming an annular space within a sheathing tube which includes six longitudinally-arranged slots uniformly distributed about its top end and into which connecting elements are received and welded to join together the sheathing tubes. In one form, the connector element includes spacer heads extending along a web to lie within the annular gap between the reactor tube and the sheathing tube and abut against the reactor tube. In a second embodiment, the connector element includes a web having three spider arms with longitudinal recesses, the width of which corresponds to the wall thickness of a sheathing tube.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: April 11, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Egon Haese, Albert Kellermann
  • Patent number: 4073628
    Abstract: Fine-grain fuel is delivered from pressure vessels with a vehicle gas as a fluidized flow into a reactor for gasification at an elevated pressure. A gaseous gasification agent is also fed into the reactor. A control system for the fine-grain fuel and gasification agent includes detectors to provide an electrical signal which varies during feeding of fuel from the pressure vessels into the reactor. Controllers produce a fuel rate control signal corresponding to a comparison between the electrical signal from the detectors and a predetermined reference value corresponding to the desired fuel supply rate. Control valves respond to the fuel rate control signal to adjust the supply of vehicle gas to transfer fuel from the pressure vessels into the reactor.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: February 14, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Paul Gernhardt, Wolfgang Grams, Wilhelm Danguillier, Siegfried Pohl
  • Patent number: 4073728
    Abstract: Flushing liquor from a gas main of a coke oven is fed into a preliminary gravity separator to provide an aqueous liquid phase substantially free of tar and solids for reuse as flushing liquid in the gas main. A tar phase obtained from the preliminary gravity separator is fed into a circuit including a centrifuge for three-phase clarification and separation. The circulation in the circuit being at quantities greater than the quantities of the tar phase introduced per unit of time from the gravity separator to obtain a tar surplus which is substantially free of aqueous liquid and thick tar. The tar surplus is removed from the circuit by feeding clean tar from the centrifuge into an overflow tank from where clean tar is reintroduced into the circuit and clean tar is returned to the preliminary gravity separator in controlled response to the tar level therein.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: February 14, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Hansjurgen Ullrich, Heinz Dippel, Karl Loss
  • Patent number: 4073862
    Abstract: A process is provided for removing ammonia, hydrogen sulfide and hydrocyanic acid from gases such as coke oven gas. In carrying out the process, the gas to be cleaned is first washed with an alkaline solution to remove the hydrogen sulfide and hydrocyanic acid. The hydrogen sulfide is oxidized by air to produce elemental sulfur, which is removed, and the alkaline solution is recirculated for reuse, a portion of the solution carrying cyanide and other compounds being diverted for further treatment. The gas to be cleaned is subjected to a second washing operation with an inorganic acid solution which removes the ammonia from the gas by formation of an ammonia salt solution. The salt solution is regenerated to recover the acid which is recirculated for reuse.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: February 14, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Egon Haese
  • Patent number: 4066420
    Abstract: A process for gasification of pulverized or fine-grain coal is characterized by using a portion of the combustible gas generated at a temperature between 1500.degree. and 2200.degree. C in a slag bath generator as a gaseous agent that is mixed with the coal and then introduced under pressure into the slag bath generator. The portion of the combustible gas to be used for this purpose undergoes processing which includes extracting dust, cooling and drying before the gas is combined with the fuel. According to a different embodiment, the combustible gas produced in the generator is used in the reduction process by feeding the gas into a reduction shaft furnace. The top gas from the shaft furnace is processed by extracting dust, cooling, drying and normalizing the acidity of the top gas before the top gas is combined with fuel for introduction as a mixture into the slag bath generator.
    Type: Grant
    Filed: March 4, 1977
    Date of Patent: January 3, 1978
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Wilhelm Danguillier, Wolfgang Grams
  • Patent number: 4059885
    Abstract: A damaged part of a coke oven such as a heating wall is restored by selecting masonry bridging material with an essentially low thermal expansion property to close the heating flue and support the heating wall. The selected masonry bridging material may take the form of bridging bricks or castable concrete material. Such masonry bridging material is arranged to close and support the existing masonry which is to remain as part of the heating wall for continued use. The masonry bridging material forms flat connecting surfaces used to provide lateral expansion joints which are aligned from course-to-course. The expansion joint compensates for length changes of the renewed part of the heating wall formed by stretcher bricks having the usual relatively high thermal expansion property. The masonry bridging material reforms an internal crosswall that defines part of a heating flue chamber within a heating wall.
    Type: Grant
    Filed: March 19, 1976
    Date of Patent: November 29, 1977
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Hans Oldengott
  • Patent number: 4049394
    Abstract: A control system maintains a predetermined volumetric ratio between fine-particle fuel and a gasification agent which are fed separately into a reactor wherein the fuel is gasified under pressure. The control system includes a first measuring means responsive to the absorption of electromagnetic radiation by the fine-particle fuel in a fuel-feed line for producing a fuel-feed signal corresponding to the volumetric amount of fuel conducted by the line. A vehicle gas-feed signal is produced by a second measuring means in response to the volumetric amount of vehicle gas conducted by a line into the fuel-feed line for admixture with the fuel therein. Computing means is responsive to the fuel-feed signal and the vehicle gas-feed signal to produce a control signal according the expression:U.sub.1 . (U.sub.2 - U.sub.v)for all values of U.sub.2 greater than U.sub.v where U.sub.1 corresponds to the reciprocal of the fuel-feed signal, U.sub.2 corresponds to the vehicle gas-feed signal and U.sub.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: September 20, 1977
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Paul Gernhardt, Wolfgang Grams, Wilhelm Danguillier, Siegfried Pohl
  • Patent number: 4049570
    Abstract: The high temperature gasification of solid fuel or mixtures of solid and liquid fuels is carried out by a method and apparatus wherein the gasified product from a high temperature gasification chamber having a slag bath therein is fed into a first dust collector. Gases, including vapors or aerosols, are fed from the dust collector into a waste heat boiler to reduce the temperature of the gases down to about 250.degree. C. The solids which essentially include flue coke are discharged from the dust collector into a separate heat exchanger wherein the temperature of the solids is reduced down to about 200.degree. C. The cooled solids and the cooled gases are fed into an absorption chamber wherein for a period of 1 to 10 seconds, the aerosols are absorbed into the flue coke. The absorption chamber is connected to a second dust collector that separates the gases from the flue coke having the absorbed aerosols.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: September 20, 1977
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Paul Gernhardt, Wolfgang Grams, Siegfried Pohl, Wilhelm Danguillier
  • Patent number: 4046641
    Abstract: A process and apparatus for the regeneration of washing oil which has been spent to recover naphthalene and/or benzol from coke oven gas. The spent washing oil is stripped by steam in a bubble column arranged as an integral part of a single main column that includes first, second and third exchange column sections disposed in a superimposed relation one above the other to receive the stripped vapors from the bubble column. The first exchange column section is fed with a mixture of toluene, xylene and naphthalene as a reflux, the second exchange column section is fed with water as the reflux and the third exchange column section is fed with benzol as the reflux. The head product from the column is condensed and passed through a first-phase separator to obtain a substantially anhydrous benzol fraction and a water fraction. These fractions are separately used as a reflux for the second and third exchange column sections.
    Type: Grant
    Filed: March 12, 1975
    Date of Patent: September 6, 1977
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Hansjurgen Ullrich
  • Patent number: 4043766
    Abstract: Nozzles introduce jet streams of fine-grain fuel and a gasification medium downwardly toward the surface of a slag bath at the bottom of a cylindrical reactor shaft within a vessel to impinge upon the surface of liquid slag which is discharged through a centrally-arranged overflow in the bottom of the vessel. The nozzles are arranged at an angle within a range of 35.degree. to 40.degree. with respect to the horizontal and positioned so that the jet streams impinge upon the surface of the slag at points defined by a plurality of concentric circles with respect to the overflow to circulate and produce a resulting movement of the liquid slag toward the overflow while maintaining a high temperature and homogeneous slag bath. The nozzles are further positioned so that an angle of about 10.degree. is defined between each jet stream and a vertical tangential plane to the concentric circle at the point where the jet stream impinges.
    Type: Grant
    Filed: October 26, 1976
    Date of Patent: August 23, 1977
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Paul Gernhardt, Wolfgang Grams, Wilhelm Danguillier, Siegfried Pohl
  • Patent number: 4029055
    Abstract: A boiler has an outer wall of weldable material and an inner chamber including a high temperature heat exchanger which is connected by pipes passing through openings in the outer boiler wall for the supply and discharge of a heat exchange medium. Each pipe for the heat exchange medium is spaced from and passes through a sleeve-like jacket that is welded to the outer boiler wall and projects outwardly therefrom. A cooling gas is fed into the sleeve-like jacket to pass along an annular space between the jacket and the pipe. The cooling gas flows into an annular chamber between the outer boiler wall and the inner chamber. According to a second embodiment, concentric sleeves are provided in the annular space between the jacket and pipe to pass the cooling gas to and fro within this space.
    Type: Grant
    Filed: October 8, 1975
    Date of Patent: June 14, 1977
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Egon Haese
  • Patent number: 4026768
    Abstract: A carriage movable along the coke side of a coke oven battery and carrying a coke guide, a door extractor, a frame cleaner and a door cleaner. These elements can be manipulated on the carriage so as to effect door extraction, coke pushing, door cleaning and frame cleaning in a minimum amount of time and without the necessity for moving the carriage itself along the coke oven battery while servicing any one coke oven chamber.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: May 31, 1977
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Hans Bahnsch, Hans-Jurgen Kwasnik
  • Patent number: 4014750
    Abstract: This disclosure relates to reinforced support walls arranged to extend transversely of the length of a battery of coke ovens in a cellar for supporting battery decking of underjet coke ovens. Ducts extend in the cellar for supplying gaseous combustion media to the heating flues of the heating walls and control members are arranged in the cellar to control the flow of the combustion media in the individual ducts. A foundation slab includes reinforcement members bonded to reinforcement members within the support walls. Expansion joints, including slip plates, are arranged between the support walls and the battery decking. The decking may include a projection extending downwardly along the center line of the battery for bonding engagement with the support walls.
    Type: Grant
    Filed: January 22, 1975
    Date of Patent: March 29, 1977
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventor: Wolfgang Franzer