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4556017 |
Fluidized bed combustion apparatus
A fluidized bed furnace and boiler for the combustion of flyash with a moisture content of 45% by weight. The flyash is produced as a by-product of a coal gasification process and transported in...
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4555992 |
Coal gasification installation
An installation for gasifying coal in a fluidized bed under high pressure has a vessel resistant to the high pressure and a reactor disposed in the interior of the vessel and having a principal...
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4553502 |
Tube-type heat exchanger
The exchanger is placed in a fluid of elevated temperature and comprises tubes connected to an inlet header and to an outlet header. The exchanger comprises a plurality of panels (4) constituted by...
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4552097 |
Steam generator with a stationary fluidized-bed hearth
A steam generator arranged as a single-pass boiler with a stationary fluidized-bed hearth and a superimposed ash-circulating system. The fluidized bed is divided into several individually...
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4552203 |
Method and device for controlling the temperature of a reaction carried out in a fluidized bed
Method and a device for controlling the temperature of a reaction carried out within a vessel in a fluidized bed containing solid particles which can be entrained with the smoke and then recovered...
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4552078 |
Process and installation for recycling solid unburnt materials in a fluidized bed
Process and apparatus for supplying combustible material to a fluidized bed in a vessel connected to a separating device for the solid particles entrained with the smoke and containing a certain...
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4550769 |
Solids quench boiler and process
A process for quenching and cooling reactor effluent is provided. The apparatus utilized to practice the process includes a section for introducing relatively cool particulate solids into a hot...
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4548138 |
Fast fluidized bed reactor and method of operating the reactor
A fast fluidized bed reactor, comprising an upright reaction chamber for containing a bed of granular material, the chamber having a cylindrical upper region and a lower region; a feeder for...
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4543894 |
Process for staged combustion of retorted oil shale
A two-stage process for staged combustion of crushed retorted particles, especially sulfur and nitrogen-bearing shale, provides maximum heat from combustible materials in shale while emissions of...
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4542716 |
Fluidized bed compact boiler
A boiler comprising a fluidized bed combustion chamber which communicates with an exchange enclosure containing water tubes heated by the combustion tubes and within which is arranged an exchange...
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4539939 |
Fluidized bed combustion apparatus and method
The invention includes the steps of, and suitable apparatus for, maintaining a plurality of relatively dense bead-like particles of inert solid material dispersed throughout the fluidized...
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4535706 |
Fluidised beds
Fluidised bed combustor comprising a housing (10) and an air diffuser bed support arrangement (12, 14, 15, 16) disposed in the housing (10) to support and fluidise a bed of material (11) in the...
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4528945 |
Boiler and method of heating liquid
In a tube boiler, fuel is burned in a fluidized bed which has a shallower part and a deeper part. The tubes extend only through the shallower part which can be fluidized independently of the deeper...
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4522154 |
Fluidized bed combustion boiler
A combustion boiler is described for use with low quality feedwater. A combusting fluidized bed is circulated through a substantially vertical elongated combustion chamber in an upward path from...
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4519770 |
Firetube boiler heater system
The burner system is adapted for retrofit into the combustion chambers of firetube boilers. The burner is comprised of a hollow shell molded from a porous ceramic fiber matrix. Fuel and air...
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4515205 |
Method for fluidized particle tray heat exchange
A heat exchanger system exhibits an improved coefficient of heat transfer over a conventional convection heat exchanger while maintaining the beneficial high temperature driving force of...
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4510892 |
Seal for boiler water wall
A boiler (10) made up of three separate sections consisting of (1) a bottom supported fluidized bed (12); (2) a top supported upper furnace portion (14); and (3) a vertical boiler section (24) in...
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4506631 |
Process to produce hydrogen and oxygen utilizing the energy content of waste materials
The invention describes a process wherein high-purity hydrogen and oxygen gases can be economically produced via a water electrolysis method, utilizing cheap energy recovered from an incineration...
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4505230 |
Fluidized bed combustion units
The specification describes arrangements in which the attemperation or control of the temperature of a fluidized bed in a fluidized bed combustion unit effected by means of the mixture of a...
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4499857 |
Fluidized bed fuel burning
Controlling a fluidized bed coal combustor by sensing certain variables and thereby controlling other variables.
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4499944 |
Heat exchangers installed in fluidized beds
A heat exchanger including a serpentine heat transfer tube embedded in a fluidized bed contained in a vertical casing. The heat transfer pipe has a construction such that fluid undergoing heat...
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4494485 |
Fired heater
A fired heater incorporating radiant tube sections in the combustion chamber. Radiant burners mounted in the chamber side walls combust reactants flamelessly and transfer thermal energy inwardly to...
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4492184 |
Solids cooling
Apparatus for cooling hot particulate solids, especially shale solids, and reclaiming heat therefrom. The apparatus is constituted of an elongate housing divided into two compartments by a...
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4488512 |
Feedstock injection system for fluidized bed combustor
A hydro-pressurized fluidized bed combustor having an uptanding shell and an entry at its bottom for admission of feedstock. The feedstock passes through a conduit surrounded by a heat exchanger....
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4483276 |
Fluid particle backmixed cooling apparatus
An apparatus for the cooling of hot fluidized solid particles. The apparatus comprises in combination: (a) a vertically oriented combustion chamber; (b) a disengagement chamber above and connected...
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4481892 |
Atmospheric fluidized bed combustor
A fluidized bed combustion system for burning fuel particles, such as coal. The system includes a housing defining a first combustion region. An endless, flexible, perforate belt is shiftably...
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4479458 |
Hexagonal pressurized fluidized bed reactor
A reactor in which a plurality of vertical panels are disposed in a vessel and are constructed and arranged so as to form three combustion cells. Three of the panels each form a common wall between...
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4476790 |
Method of feeding particulate material to a fluidized bed
A centrifugal spreader type feeder that supplies a mixture of particulate limestone and coal to the top of a fluidized bed reactor having a flow of air upward therethrough. Large particles of...
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4476816 |
Staged cascade fluidized bed combustor
A fluid bed combustor comprising a plurality of fluidized bed stages interconnected by downcomers providing controlled solids transfer from stage to stage. Each stage is formed from a number of...
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4475472 |
Method and apparatus for operating a vortex bed furnace
Known vortex bed furnaces have a relatively high structural volume in relation to the firing performance. In addition, special devices are necessary for supplying the vortex bed with fuel and with...
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4473032 |
Steam generator with circulating atmosphere or pressurized turbulent layer firing, and method for control thereof
The total evaporator heating surface of a steam generator with circulating atmospheric or pressurized turbulent layer firing is distributed over several partial surfaces which are arranged in a...
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4473033 |
Circulating fluidized bed steam generator having means for minimizing mass of solid materials recirculated
The invention comprising a circulating fluidized bed firing system for a steam generator wherein the mass flow ratio for solid materials recirculated to hot gas flow employed to entrain and carry...
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4471723 |
Heat recovery method and installation, particularly for cooling ash
The invention relates to a recovery method and installation for the heat contained in a solid substance, occurring in divided form and more especially in ash produced by a fluidized bed combustion...
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4466385 |
Support for in-bed heat exchanger
A heat exchanger is mounted in the upper portion of a fluidized combusting bed for controlling the temperature of the bed. The supported heat exchanger may be fed by or be a part of water-cooled...
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4466479 |
Method of transferring heat between two fluids and heat exchange tube
A method for transferring heat between two fluids comprises (1) flowing the first fluid in an upright diamond shaped tube, and (2) flowing the second fluid therearound the tube over upper and lower...
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4465022 |
Fluidized bed retrofit boiler
A boiler is adapted for solid-fuel firing by connecting with an existing combustion chamber of the boiler. Apparatus comprising a bed of particles with means for feeding solid fuel and primary air...
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4465021 |
Steam generator with a main boiler and a fluidized bed furnace
A steam generator in which a main boiler is provided and at least one fluidized bed furnace is connected with the main boiler and is operated independently of the furnace of the main boiler. The...
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4462341 |
Circulating fluidized bed combustion system for a steam generator with provision for staged firing
The invention comprises a steam generator having a circulating fluidized bed combustion system whereby there is provision to admit air flow incrementally along the gas path to control combustion...
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4459071 |
Solids flow regulator
An apparatus to serve as a valve to regulate the flow of particulate solids, from an upstream to a downstream location. The valve relies on pressure differential rather than moving mechanical...
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4455969 |
Fluidized bed combustor
A fluidized bed combustor has its fluidizing chamber in thermal contact with a surrounding heat exchanger. A lined base portion of the chamber capable of containing the bulk of bed material while...
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4455968 |
Boilers
A shell boiler is disclosed having apparatus for feeding solid fuel to a furnace grate, contained within a furnace tube of the boiler, downwardly through the steam and/or water space of the boiler....
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4454838 |
Steam generator having a circulating fluidized bed and a dense pack heat exchanger for cooling the recirculated solid materials
The invention comprises a dense pack heat exchanger for a steam generator having a circulating fluidized bed combustion system whereby a bed of solid particles comprising fuel and inert material is...
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4453495 |
Integrated control for a steam generator circulating fluidized bed firing system
The invention comprises an integrated control means, and particularly at partial loads, for a steam generator having a circulating fluidized bed combustion system wherein gas recirculation means is...
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4453497 |
Augmented heat transfer method and apparatus
The operation of gas turbines in combined cycle or cogeneration plants utilizing circulating fluidized beds is improved by increasing the temperature of the air supplied them. The temperature of...
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4453494 |
Fluidized bed boiler having a segmented grate
A fluidized bed furnace (10) is provided having a perforate grate (9) within a housing which supports a bed of particulate material including some combustibles. The grate is divided into a...
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4450146 |
Heat recovery in P.sub.2 O.sub.5 production process
Waste heat is recovered during the production of phosphorus pentoxide by a process comprising the combustion of phosphorus and the passing of the combustion gases through a fluid bed, wherein the...
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4449482 |
Fluidized bed boilers
A fluidized bed boiler having a water-wall type construction has a steam-water natural circulation system for heat exchange. Vertical in-bed heat exchange tubes are provided and the steam drum of...
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4446917 |
Method and apparatus for producing viscous or waxy crude oils
Tubing which contains crude oil being moved to the surface is surrounded by concentric sections of pipe at various depths along portions of the tubing. Said concentric sections of pipe contain a...
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4446629 |
Fluidized bed heat exchanger utilizing induced circulation
A fluidized bed heat exchanger in which a perforated plate is disposed within a housing for supporting a bed of particulate material which is introduced into the housing through an inlet. Air is...
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4445844 |
Liquid fuel and air feed apparatus for fluidized bed boiler
A fluidized bed furnace is provided in which liquid fuel can be burned. Injectors extend up through an imperforate bed plate which properly mix the oil or other liquid fuel with the fluidizing air...
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