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| Number | Title | Issue Date |
| 6033108 | Extended range fiber-optic temperature sensor An apparatus and method for sensing temperature within a broad temperature range, includes a fiber optic having an etalon at one end for reflecting light supplied at an opposite end by a pair of light sources operating at different wavelengths. The light ... | 03/07/2000 |
| 6010664 | Oxidation detection for sulfite/sulfate systems A method for monitoring the oxidation rate in a flue gas desulfurization system having a slurry comprises locating a monitor in the system for accessing the slurry. A sample is periodically drawn from the slurry by the monitor wherein a titration is perfo... | 01/04/2000 |
| 6006702 | Retainer shield for split ring castings A retainer shield for a split ring retains boiler tubes aligned therein and dissipates heat from a front weld thereon. The retainer shield is preferably made from about 50% chromium and about 50% nickel and is welded to one end of the split ring to assist... | 12/28/1999 |
| 5961321 | Distributive integral gas burner A burner apparatus useful in steam producing or waste heat boilers. The apparatus includes a fuel delivery means placed between two airfoils that define an elongated venturi throat. The airfoils may be provided with a plurality of perforations to allow a ... | 10/05/1999 |
| 5953935 | Ethane recovery process An improved ethane recovery system and process which increases the recovery of ethane up to about 99% with no increase in plant residue compression horsepower. The improved ethane recovery process employs an additional fractionation column which receives ... | 09/21/1999 |
| 5934227 | Variable pressure once-through steam generator upper furnace having non-split flow circuitry A once-through steam generator having single pass non-split fluid flow upper furnace circuitry with a one to one connection of tubes of the lower furnace spiral or vertical tube assembly being connected to the vertical tubes of the upper furnace assembly ... | 08/10/1999 |
| 5901669 | Variable pressure once-through steam generator upper furnace having non-split flow circuitry A once-through steam generator having single pass non-split fluid flow upper furnace circuitry with a one to one connection of tubes of the lower furnace spiral or vertical tube assembly being connected to the vertical tubes of the upper furnace assembly ... | 05/11/1999 |
| 5895507 | Diesel or dual-fuel engine and black liquor gasifier combined cycle A combined cycle power generation and chemical recovery system has a gasifier system for producing a fuel gas from a by-product of an industrial process, such as a black liquor from a paper mill and a diesel, or dual-fuel, engine/generator connected to th... | 04/20/1999 |
| 5893340 | Erosion protection at line discontinuity for enclosure and internal walls in fluidized bed combustors and reactors A water tube wall or heat transfer surface for use in a circulating fluidized bed combustor or reactor having reduced erosion at a transition between a protective refractory material and the upper wall.... | 04/13/1999 |
| 5890442 | Gas stabilized reburning for NOx control A coal-water slurry liquid fuel or coal or other liquid fuel is atomized for combustion in the reburn zone of a boiler with a relatively small addition of natural gas to produce NOx reductions comparable to the reburn effect of natural gas alon... | 04/06/1999 |
| 5884776 | Dynamic classifier with hollow shaft drive motor A dynamic classifier for a coal pulverizer has an improved drive mechanism which is mounted on top of a pulverizer and concentric with the classifier axis of rotation and is directly controllable. The drive mechanism is a variable-speed DC or AC electric ... | 03/23/1999 |
| 5866820 | Coil volumetric and surface defect detection system A EMAT inspection system is utiliized on sheet metal prior to it being formed or rolled to identify surface defects and sub-surface defects such as pencil pipe inclusions by using ultrasonic Lamb waves with the results being displayed on a remote screen o... | 02/02/1999 |
| 5845033 | Fiber optic sensing system for monitoring restrictions in hydrocarbon production systems A sensor apparatus and method for identifying a restriction in the flowline of a hydrocarbon production system, utilizes an optical fiber or optical fiber cable which is engaged along and preferably spirally wound around and along the flowline. Spaced apa... | 12/01/1998 |
| 5829369 | Pulverized coal burner A burner having lower emissions and lower unburned fuel losses by implementing a transition zone in a low NOx burner. The improved burner includes a pulverized fuel transport nozzle surrounded by the transition zone which shields the central ox... | 11/03/1998 |
| 5826518 | High velocity integrated flue gas treatment scrubbing system An integrated flue gas treatment desulfurization system for treating flue gas exhausted from an electrostatic precipitator and passing at a flue gas flow velocity in the range of 10-20 ft./sec. or more through a condensing heat exchanger and a wet flue ga... | 10/27/1998 |
| 5824141 | Apparatus for mixing a tank and improving air/liquid contact in an oxidized system An apparatus to mix a slurry mixture with an oxidization air within a reaction tank of a wet scrubber spray tower of a flue gas desulfurization system for a furnace. The apparatus improves the contact between forced oxidization air and slurry mixture with... | 10/20/1998 |
| 5799724 | Trapezoidal deflectors for heat exchanger tubes A deflector means having a trapezoidal cross section for reducing erosion of heat exchanger tubes caused by a flowing, particle-laden combustion gas produced in a fossil fuel-fired boiler, and a draft loss reduction means for use in connection with the de... | 09/01/1998 |
| 5787821 | High velocity integrated flue gas treatment scrubbing system An integrated flue gas treatment desulfurization system for treating flue gas exhausted from an electrostatic precipitator and passing at a flue gas flow velocity in the range of 10-20 ft./sec. or more through a condensing heat exchanger and a wet flue ga... | 08/04/1998 |
| 5782209 | Segmented automated sludge lance A segmented automated sludge lance is described for cleaning sludge from tubes in a steam generator. The segmented lance guide and waterlance are moved inside the steam generator to direct a fluid between the tubes to effectively clean sludge from the tub... | 07/21/1998 |
| 5775650 | Roll wheel stand A roller wheel stand for providing long term storage for a roller wheel assembly and allowing scheduled rotation of the roller wheel assembly for proper lubrication includes a pair of vertically oriented channel members fastened to a pair of bottom member... | 07/07/1998 |
| 5762005 | Wedge splash plate for kraft recovery furnace black liquor burners A wedge shaped form is mounted on the splash plate of a black liquor nozzle with the sharp edge of the wedge located at the exhaust of the nozzle to split the black liquor from the nozzle into two flat sheets on each side of the wedge with no droplet form... | 06/09/1998 |
| 5763786 | Automated mill roll inspection system An EMAT inspection system is utilized on a mill roll to identify surface and sub-surface defects such as firecracks in steel mill rolls with the results being displayed on a remote screen of a display and control system which also records the inspection r... | 06/09/1998 |
| 5760307 | EMAT probe and technique for weld inspection A method and apparatus of inspecting for flaws in a specular reflector, where the flaws having an expected length and the reflector is electrically conductive. The method includes directing a beam of an electromagnetic acoustic transmitting transducer alo... | 06/02/1998 |
| 5759961 | Superconductor fiber elongation with a heated injected gas An improved method and apparatus for producing flexible fibers (30) of superconducting material includes a crucible (12) for containing a charge of the superconducting material. The material is melted in the crucible (12) and falls in a stream (18) throug... | 06/02/1998 |
| 5755188 | Variable pressure once-through steam generator furnace having all welded spiral to vertical tube transition with non-split flow circuitry A once-through steam generator furnace having single pass non-split fluid flow circuitry to prevent steam-water separation with a one to one connection of smaller diameter tubes of the lower furnace spiral tube assembly being connected to the larger diame... | 05/26/1998 |
| 5752994 | Black liquor gasifier A system and method for producing product gas using residual waste liquor is described with a gasifier reactor having a fluidized bed located therein. The gasifier reactor is heated to a predetermined temperature range with either an external heater or a ... | 05/19/1998 |
| 5730087 | Tube enclosure and floor support routing for once through steam generators Pendant convection pass tube circuitry of once through steam generator have their floor and floor support tubes enlarged by a swage coupling and connected to enlarged sidewall tubes supported from steel boiler top supports to provide a more flexible circu... | 03/24/1998 |
| 5726408 | Weld backing ring for nozzle repairs A tube such as a nozzle to be repaired or tubular sections to be repaired or connected to each other, are welded using a backing ring having a groove in the area to be welded. The groove forms a purge space for purge gas between the ring and the tube to e... | 03/10/1998 |
| 5722353 | Once-through steam generator vertical tube hopper enclosure with continous transition to spiral furnace enclosure A once-through steam generator having single pass non-split fluid flow circuitry with a one to one connection of furnace hopper vertical tubes assembly being connected to the spiral tubes of the lower furnace assembly.... | 03/03/1998 |
| 5716671 | Continuous deposition of bridge free interfacial coatings on multifilamentary ceramic fiber tows A method for coating ceramic fibers such as Al2 O3 fibers includes immersing the Al2 O3 fibers in a polyelectrolyte solution. After the polyelectrolyte is allowed to adsorb on the fibers, the unabsorbed polyelec... | 02/10/1998 |
| 5714689 | Zig zag electromagnetic acoustic transducer scan A flaw detection method and arrangement utilizes electromagnetic acoustic transducers (EMATs) which ultrasonically test a material for cracks or flaws. Four EMATs are used in a pitch-catch configuration, i.e. two pairs of EMAT transmitters and receivers. ... | 02/03/1998 |
| 5713291 | Rotated multi-cylinder air delivery port A multi-cylinder air delivery port for introducing air into a fossil fuel-fired boiler and auxiliary equipment. The air delivery port is generally comprised of a linearly translatable and rotatable bundle of open ended cylinders that allow air to be injec... | 02/03/1998 |
| 5707426 | Key advanced linear kinetic absorber method using a particulate arresting device A method for improved removal of particulates and contaminants from a flue gas produced by the combustion of waste materials or fossil fuels in industrial processes having at least one horizontally oriented heat exchanger stage in which a wet scrubbing so... | 01/13/1998 |
| 5685243 | Apparatus for the injection distribution and dispersion of sorbent in a utility boiler furnace A system and method for distributing, injecting, and dispersing a sorbent mixture of sorbent and compressed filtered flue gas into the combustion furnace portion of a boiler furnace. Prior to injection into the combustion furnace, the sorbent mixture is h... | 11/11/1997 |
| 5685170 | Propane recovery process Increased recovery of propane, butane and other heavier components found in a natural gas stream is achieved by installing an absorber upstream from an expander and a separator. The separator is downstream from the expander and returns the liquid stream g... | 11/11/1997 |
| 5680823 | Short flame XCL burner A pulverized fuel burner having lower emissions and lower unburned fuel losses by outwardly diverting and swirling pulverized fuel at the outlet of a fuel nozzle carrying the pulverized fuel. Diverting cone is positioned at the outlet of the fuel nozzle a... | 10/28/1997 |
| 5676716 | Apparatus for mixing a tank and improving air/liquid contact in an oxidized system An apparatus to mix a slurry mixture with an oxidization air within a reaction tank of a wet scrubber spray tower of a flue gas desulfurization system for a furnace. The apparatus improves the contact between forced oxidization air and slurry mixture with... | 10/14/1997 |
| 5676715 | Key advanced linear kinetic absorber system particulate arresting device An apparatus for improved removal of particulates and contaminants from a flue gas produced by the combustion of waste materials or fossil fuels in industrial processes having at least one horizontally oriented heat exchanger stage in which a wet scrubbin... | 10/14/1997 |
| 5676193 | Cast abrasion resistant hollow balls A cast abrasion resistant hollow ball is formed with a hollow ceramic core that generates no gas during the casting operation. Solid ceramic bars or supports hold the hollow ceramic core in a fixed location at the center of the cast ball during the castin... | 10/14/1997 |
| 5673939 | Fuel tank for storing and dispensing hydrogen and oxygen gas to a fuel cell A dual-gas fuel tank assembly for a fuel cell driven vehicle wherein the fuel tank is interposed within the vehicle frame as an integral portion thereof with the tank assembly having a plurality of cylindrical pressure tanks of composite material construc... | 10/07/1997 |
