Patents Assigned to Steag A.G.
  • Patent number: 4342192
    Abstract: A plant for producing power from solid fossil fuels, more particularly bituminous coal, is made up of at least one boiler in which the solid fuels are burned. The plant furthermore has a steam turbine and a gas turbine for producing power from the gas, the gases being cleaned of dust and sulfur before running into the gas turbine. The boiler of the plant is a pressure-fired boiler in which firing takes place in the dry condition, that is without melting of ash.
    Type: Grant
    Filed: November 15, 1979
    Date of Patent: August 3, 1982
    Assignee: Steag A.G.
    Inventors: Klaus Heyn, Hans-Joachim Pogrzeba
  • Patent number: 4239500
    Abstract: A process for the utilization of tar-dust which is separated from the gases derived from gasification of granular fuel under pressure, especially of bituminous coal, and in which the tar-dust separated from the gases is fed back into the pressure gasification cycle of the fuel. The tar-dust is added as a binder in the pelletization of the fine grained portions of the fuel and is fed in pellet form into the generator. Apparatus for carrying out the process comprises a pressure generator having a feed device for granular fuel, a tar-dust separator, and a pelletizing device connected by a tar-dust coveying pipe to the tar-dust separator, for the pelletizing of fine grains of fuel with tar-dust as a binder, the pelletizing device conveying the green pellets produced thereby into the feed device. The granular fuel is screened to pass only that portion below a predetermined grain size to the pelletizer, the remaining portion being fed directly to the generator.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: December 16, 1980
    Assignee: Steag A.G.
    Inventor: Wolfgang Ratzeburg
  • Patent number: 4231761
    Abstract: Apparatus for limiting fuel gas fed to the gas flare unit in a coal pressure gasification unit provided with a gas-steam turbine power plant connected thereto. Safety valves and a pressure orifice minimize atmospheric pollution.
    Type: Grant
    Filed: June 23, 1978
    Date of Patent: November 4, 1980
    Assignee: Steag A.G.
    Inventor: Helmut Meyer-Kahrweg
  • Patent number: 4111665
    Abstract: Apparatus for the gasification under pressure of bituminous coal, especially fine coal, comprising a generator which has a container to receive the coal to be gasified and a feed device which supplies the coal to the container, while keeping the container closed off so as to maintain the pressure in the generator. The feed device includes a briquette forming device located on the container, and a continuously operable screw conveyor which feeds the coal to be gasified through the briquette forming device and directly into the container in the form of briquettes. The feed device is encapsulated and, together with the fine coal and briquettes within it, forms a gas tight closure for the container to maintain the pressure therein.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: September 5, 1978
    Assignee: Steag A.G.
    Inventors: Rudolf Pasternak, Jochen Bauer