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| Number | Title | Issue Date |
| 4409196 | Synthesis gas for ammonia production A process for producing a gas stream for ammonia synthesis in which a gas stream containing hydrogen and nitrogen in excess of ammonia synthesis requirements, e.g. obtained by partial oxidation of natural gas, coal or oil, is treated to remove other compo... | 10/11/1983 |
| 4389222 | Gas producers apparatus A gas producer for coal gasification in which the gas collecting flues are provided with means for flow rate determination and adjustable flow restriction.... | 06/21/1983 |
| 4359968 | Fluidized bed heat exchanger utilizing a baffle system A fluidized bed heat exchanger in which a bed of particulate material is supported on a grate in a housing and air is passed through the grate and the particulate material to fluidize the bed and promote the combustion of combustible material contained th... | 11/23/1982 |
| 4328019 | Melting system and process for use in the production of high temperature mineral wool insulation A method and apparatus for melting low-cost raw materials such as blast furnace slag, basalt, feldspar or electrophos slag in the formation of high temperature mineral wool insulation. The low-cost mineral stock material is fed in particulate form continu... | 05/04/1982 |
| 4326897 | Post weld heat treatment of shell and tube heat exchangers and apparatus An apparatus and method is provided for heat treating a tubular type heat exchanger. A heat fluid is passed through the tube bundle in order to heat the exchanger from within.... | 04/27/1982 |
| 4325716 | Mixing chamber in combination with a dust cyclone separator A mixing chamber for mixing gases produced in a gas producer in combination with a dust cyclone, the mixing chamber comprising a housing having at least two inlets and a perforated hood structure covering one of the inlets. In use the gas delivered from t... | 04/20/1982 |
| 4320244 | Melting furnace for the production of mineral wool insulation A melting furnace for the production of mineral wool insulation in the nature of a receptacle closed by a cover or crown through which spaced carbon electrodes extend from an external support and also through which particulate stock material is introduced... | 03/16/1982 |
| 4315893 | Reformer employing finned heat pipes An apparatus is provided for supplying heat required for a reforming reaction through the use of heat pipes adapted to transfer heat from a source to reforming reactants. Heat pipes extend between two chambers, with a catalyst material being disposed with... | 02/16/1982 |
| 4308914 | Double plate flow distributor A U-tube type heat exchanger is provided with means for uniformly distributing shell side fluid across the lateral expanse of the tube bundle. The distributor means includes first and second upstanding plates between which are connected several ribs.... | 01/05/1982 |
| 4308810 | Apparatus and method for reduction of NOx emissions from a fluid bed combustion system through staged combustion Apparatus and method for the reduction of nitrogen oxides (NOx) in the emissions of a fuel burning fluidized bed combustion system. Using a staged combustion technique, an overfire air inlet is provided in the freeboard zone above the bed. In the first st... | 01/05/1982 |
| 4304001 | Industrial control system with interconnected remotely located computer control units A control system for controlling an industrial process includes a plurality of remotely located process control units (remotes) each coupled to an associated input/output device(s) and adapted to communicate with one another through a dual channel communi... | 12/01/1981 |
| 4294200 | Variable pressure vapor generator utilizing crossover circuitry for the furnace boundary wall fluid flow tubes A vapor generator including an enclosure defined by front wall or rear wall and two sidewalls with each of the walls being formed by a plurality of interconnected fluid flow tubes. Fluid is passed initially through the entire length of at least one of the... | 10/13/1981 |
| 4290388 | Vapor generator A vapor generator is provided for producing vapor such as steam to be used for heavy oil recovery and the like. The vapor generator includes an octagonal cross-section furnace, which has evaporator surface arranged to allow for heating of said fluid to fi... | 09/22/1981 |
| 4290003 | High voltage control of an electrostatic precipitator system There is provided a precipitator system including a voltage controller which produces from an alternating power source a variable output. This variable output drives a high voltage converter which applies a high voltage to a precipitator. This variable ou... | 09/15/1981 |
| 4287430 | Coordinated control system for an electric power plant The operation of an electric power plant is controlled by generating a control signal in response to the pressure at the throttle valves, the load demand signal and the megawatt output of the power plant. During the start-up, before the pressure ramp ends... | 09/01/1981 |
| 4286654 | Heat exchanger tube supports A heat exchanger having a number of heat exchange tubes and an improved tube support. The support comprises a plurality of strips which are identical and joined together so that the support engages each tube.... | 09/01/1981 |
| 4286549 | Steam generator support system An apparatus and method are provided for top-supporting a steam generator from a frame which is connected to a base. A plurality of dampers are connected between upstanding frame members and the steam generator, acting to absorb a portion of the energy re... | 09/01/1981 |
| 4275668 | Coal feed system for a fluidized bed combustor A coal feed system for use in a fluidized bed combustor in which a grate is supported in a housing and is adapted to support a bed of particulate material including a combustible fuel. Air is passed through the grate and into the bed to fluidize the parti... | 06/30/1981 |
| 4272498 | Process for comminuting and activating limestone by reaction with CO2 The present invention relates to a non-mechanical method of converting coarsely ground limestone to a very fine powder. A slurry of ground calcium carbonate or limestone is contacted with carbon dioxide gas at high pressure to convert the solids in the sl... | 06/09/1981 |
| 4270895 | Swirl producer A fuel-staging burner assembly and method in which a burner nozzle has separate, concentrically disposed elements to burn coarse and fine coal particles under different combustion conditions to reduce the production of nitrogen oxides from the combustion ... | 06/02/1981 |
| 4270599 | Tube support structure for a fluidized bed heat exchanger A fluidized bed heat exchanger in which a grid plate is supported in a housing for receiving a bed of particulate material, at least a portion of which is combustible. At least one perforated support pier projects from the surface of the grid plate and ai... | 06/02/1981 |
| 4259304 | Activation of coal The activation of coal, in which coal that has been partially oxidized with Sulfur Dioxide is introduced into a reaction zone. The coal is contacted with super-heated steam and then impregnated with vanadium.... | 03/31/1981 |
| 4257357 | Furnaces A furnace in which burners are incorporated into water-cooled tube panels without the need for heavy steel castings, the furnace including one or more walls formed of upright tubes having fins connecting adjacent tubes, some of said tubes and associated f... | 03/24/1981 |
| 4253425 | Internal dust recirculation system for a fluidized bed heat exchanger A fluidized bed heat exchanger in which air is passed through a bed of particulate material containing fuel disposed in a housing. A steam/water natural circulation system is provided in a heat exchange relation to the bed and includes a steam drum dispos... | 03/03/1981 |
| 4253148 | Distributed single board computer industrial control system An industrial control system in accordance with the present invention is provided with a plurality of diverse controlled devices (e.g., fans, pumps, valves, solenoids, relays, etc.) for effecting overall system control. Each device has a unique set of log... | 02/24/1981 |
| 4250839 | Vapor generator utilizing stacked fluidized bed and a water-cooled heat recovery enclosure A vapor generator in which a plurality of vertically aligned fluidized beds are disposed in a furnace section with one of the boundary walls of the furnace section having openings therein for permitting the discharge of effluent gases from the fluidized b... | 02/17/1981 |
| 4249470 | Furnace structure A furnace structure has a particle separator for separating a mixture of a transport fluid and pulverized coal into a coarse coal fraction and a fine coal fraction, a furnace, a burner assembly for burning the pulverized coal, and a windbox for providing ... | 02/10/1981 |
| 4248179 | Internally grooved heat transfer conduit A heat transfer conduit is provided having a groove formed in its inner wall and a lip extending along the groove adjacent thereto. The lip and groove inhibit the formation of a vapor barrier between the tube inner wall and heat transfer fluid passed ther... | 02/03/1981 |
| 4245588 | Vapor generating system having a division wall penetrating a furnace boundary wall formed in part by angularly extending fluid flow tubes A vapor generator including an upright furnace section the boundary walls of which are formed by a plurality of tubes, a portion of which extend at an angle with respect to a horizontal plane. A plurality of divisional walls are provided which extend from... | 01/20/1981 |
| 4241585 | Method of operating a vapor generating system having integral separators and a constant pressure furnace circuitry A method of operating a vapor generating system for use in a power plant having a turbine control valve means, steam turbine and condenser connected in a main flow circuit in a series flow relationship, in which fluid is passed through a vapor generator f... | 12/30/1980 |
| 4240234 | Adjustable buckstay system for vapor generators or the like There is disclosed an adjustable buckstay system for use in association with the walls of vapor generators or the like and whereby the magnitude of necessary clearances in various connecting elements of the system may be adjusted to reduce or eliminate vi... | 12/23/1980 |
| 4239693 | Process for production of methanol An improved process for the production of methanol is provided. A purge gas is removed from the synthesis reaction stage at an elevated pressure and is expanded prior to combustion in a gas turbine combustor. Exhaust gases are expanded and then sent to th... | 12/16/1980 |
| 4231839 | After-treatment processes and apparatus, especially for urea and ammonium nitrate plants Disclosed are after-treatment processes and apparatus for synthesis plants, particularly urea and ammonium nitrate plants, but applicable also to various other plants in which the synthesis reaction does not go to substantial completion. In such plants pr... | 11/04/1980 |
| 4227488 | Fluidized bed unit including a cooling device for bed material A fluidized bed combustion or gasification unit in which a grate is disposed in a housing to divide the housing into an upper chamber and a lower chamber. A bed of particulate material including burning fuel is supported by the grate and extends in the up... | 10/14/1980 |
| 4226282 | Heat exchange apparatus utilizing thermal siphon pipes A heat exchange apparatus in which each of a plurality of thermal siphon pipes has an upper portion extending in an upper heat exchange section and a lower portion extending in a lower heat exchange section. Each pipe is closed at its ends and contains a ... | 10/07/1980 |
| 4226279 | Method of suppressing formation of heat exchange fluid particles into standing waves A method of suppressing formation of heat exchange fluid particles into standing waves is provided. Pursuant to the method a plurality of metal fins attached to a plurality of tube sections extending within a shell are disposed within a heat exchanger she... | 10/07/1980 |
| 4219537 | Desulfurization and low temperature regeneration of carbonaceous adsorbent A gas desulfurization process is disclosed wherein a particulate, partially oxidized coal is used as an adsorbent for gaseous sulfur oxides and is regenerated by contact with a low temperature recycled stream of its own desorbed off-gas containing at leas... | 08/26/1980 |
| 4208650 | Data transmission system A data transmission system is provided for transmitting data over a communication link extending between a transmitter and a receiver. The transmitter is connected to a data containing unit and operates through a data cycle which addresses the data unit t... | 06/17/1980 |
| 4207292 | System for reducing sulfur dioxide A system for reducing sulfur dioxide in which a vessel is provided with an inlet for receiving coal and a plurality of gas distribution nozzles for receiving the sulfur dioxide and discharging same downwardly in the lower portion of the vessel for flowing... | 06/10/1980 |
| 4206712 | Fuel-staging coal burner A fuel-staging burner assembly and method in which a burner nozzle has separate, concentrically disposed elements to burn coarse and fine coal particles under different combustion conditions to reduce the production of nitrogen oxides from the combustion ... | 06/10/1980 |
