High Pressure Patents (Class 48/DIG3)
  • Patent number: 5868805
    Abstract: The invention relates to a process for integrated evaporation and gasification of spent liquor from the production of cellulose, the gasification taking place in a reactor (1) at a pressure of from atmospheric pressure up to about 150 bar and at a temperature of about 500.degree.-1600.degree. C., by partial combustion of the spent liquor, a gas phase and a phase of solid and/or smelted material being formed in the reactor and being removed therefrom. The invention is characterized in that the combustion gas obtained from the reactor (1) by partial combustion of the spent liquor is brought together in direct contact with spent liquor, which may have been pre-evaporated, in a first stage--for example a venturi scrubber--, with alkali metal compounds, etc.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: February 9, 1999
    Assignee: Kvaerner Pulping AB
    Inventor: Bengt Nilsson
  • Patent number: 5383944
    Abstract: A method for gasifying a combustible liquid or powder using a gas detonation wave including a step of introducing detonable mixed gas including oxidizing gas into a detonation tube, a step of spraying, coating or laying combustible liquid or powder in the detonation tube and a step of detonating the mixed gas by ignition so that the combustible liquid or powder is thermally decomposed by the high-temperature and high-pressure behind the detonation wave.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: January 24, 1995
    Assignees: Koatsu Gas Koygo Co., Ltd., Hidenori Matsui
    Inventor: Hidenori Matsui
  • Patent number: 5021270
    Abstract: The moisture or water vapor barrier protection of a composite pressure vessel suitable for use as a composite cased solid propellant rocket motor is improved by immersing the pressure vessel, during pressure testing thereof, in a curable liquid polymer solution, optionally containing electrically conductive material such as metallic flakes or powder, so that the solution may flow into open voids, cracks or fractures in the pressure vessel and subsequently curing the curable liquid polymer in said voids, cracks or fractures.
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: June 4, 1991
    Assignee: Thiokol Corporation
    Inventors: Robert E. Black, Jr., Don C. Carson, Frederick W. Van Name
  • Patent number: 4597772
    Abstract: A tilted, fixed kiln with rotory steam gasifier having a fixed elongated, pressurizable kiln body member with an input end and an output end and with the center axis supported at an angle to the horizontal so as to bring into effect gravitational forces acting on high moisture content biomass material fed into the input end and travelling through the kiln to the output end and having in the kiln body an axially extending rotor and a motor, radially spaced-apart scoop-like blade elements extending along the axial length of the kiln for tumbling the material, means for increasing the temperature from its input to its output end, spaced-apart blades and chains disposed in the rotor kiln cavities for stirring the biomass material as it travels through the kiln to prevent agglomeration, a plurality of parallel, axially extending hot gas counter-flow feedback pipes arranged around the kiln body and along the backsides of the scoop-like blade elements, a metering auger mounted vertically to the input end of the kiln
    Type: Grant
    Filed: September 20, 1984
    Date of Patent: July 1, 1986
    Assignee: Wright-Malta Corporation
    Inventor: John A. Coffman
  • Patent number: 4472171
    Abstract: Method and/or system for removing liquid slag from a pressurized gasifier. Hot liquid slag is quenched in a quenching medium such as water. The quenched and solidified slag is crushed to a maximum particle size. The crushed slag and quenching medium are alternatively connected to opposite ends of a floating piston while the other end is connected to an outlet for disposal of the slag. The crushed slag and quenching medium are subjected to the gasifier pressure so that the piston acts to forceably eject the mixture through the outlet.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: September 18, 1984
    Assignee: Texaco Development Corporation
    Inventor: James E. Broderick
  • Patent number: 4094651
    Abstract: A method for continuously reacting particulate solids with gases and/or vapors at elevated pressures by feeding the particulate solids into a reaction zone under the pseudohydrostatic pressure generated by very tall fluidized columns of particulate solids, with the descent velocity of the solids and gas in the columns being greater than the ascent velocity of the gas. Fluidizing gas is preferably used at selected points in the column in order to avoid a harmful compaction of the particulate solids.
    Type: Grant
    Filed: May 26, 1977
    Date of Patent: June 13, 1978
    Inventor: Ernest E. Donath