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| Number | Title | Issue Date |
| 8146540 | Continuous steam generator The invention relates to a continuous steam generator comprising a surrounding wall which forms a gas draught and whose lower section is configured from gas-tight evaporator tubes that are welded together and whose upper section is configured from gas-tight superhea... | 04/03/2012 |
| 8117995 | Method of and an apparatus for protecting a heat exchanger and a steam boiler provided with an apparatus for protecting a heat exchanger A method of protecting a heat exchanger that includes a flue gas cooler having plastic heat recovery tubes arranged on a counterflow principle in heat exchange connection with flue gases generated by a thermal power boiler. The heat recovery tubes are connected by a... | 02/21/2012 |
| 8096268 | Municipal solid waste fuel steam generator with waterwall furnace platens A steam generator includes a furnace configured and adapted to generate a stream of furnace exit gases from the combustion of municipal solid waste fuel. At least one superheater is disposed within an upper portion of the furnace or backpass. The superheater is conf... | 01/17/2012 |
| 7971559 | Method for removing salt deposits in reformer waste heat boilers The invention provides a method for removing salt deposits from waste heat boilers in a reformer train. The method includes the steps of producing a fluid stream which includes steam from a reformer and flowing to waste heat boilers, and controlling the temperature ... | 07/05/2011 |
| 7963257 | Sustainable waste heat management system A self-contained waste heat recovery system for a commercial oven provides circulating an energy source to an oven heating system. The oven heating system recovers heat from an oven stack or downstream of oxidizer if used and distributes the heat to bakery systems s... | 06/21/2011 |
| 7841304 | Apparatus for steam heat recovery from multiple heat streams Disclosed is an apparatus and process for recovering heat from multiple hot process streams without multiplying instrumentation. Each hot process stream is indirectly heat exchanged with a water circuit which leaves and feeds a steam drum. Heat is added to the steam... | 11/30/2010 |
| 7806090 | Boiler apparatus for combusting processed agriculture residues (PAR) and method An apparatus that extracts energy from processed agriculture residue (PAR) such as dried distiller grains or rapeseed as a biomass fuel having about 12% by weight or less moisture combusted in a vertically elongated combustion chamber having at least one suspension ... | 10/05/2010 |
| 7730854 | Process for steam heat recovery from multiple heat streams Disclosed is an apparatus and process for recovering heat from multiple hot process streams without multiplying instrumentation. Each hot process stream is indirectly heat exchanged with a water circuit which leaves and feeds a steam drum. Heat is added to the steam... | 06/08/2010 |
| 7621237 | Economizer for a steam generator An economizer for a heat recovery steam generator utilized to improve the efficiency of the Rankine cycle by preheating the water that flows to the evaporator section. The economizer multi-pass sections include up-flow tubes only. This arrangement greatly reduces th... | 11/24/2009 |
| 7587994 | Arrangement in recovery boiler The invention relates to an arrangement in a recovery boiler into which spent liquor to be incinerated and combustion air are supplied, the arrangement comprising superheaters (4a-4d) in the upper part of the recovery boiler for recoverin... | 09/15/2009 |
| 7587995 | Radiant syngas cooler A radiant syngas cooler used to contain and cool the synthesis gas produced by coal gasification processes employs radiant and convection surfaces in a specific arrangement to achieve a cost-effective, compact design. ... | 09/15/2009 |
| 7434543 | Arrangement in recovery boiler The invention relates to an arrangement in a recovery boiler, into which spent liquor to be combusted and combustion air are fed, the arrangement comprising superheaters in the upper part of the recovery boiler for recovering heat. Instead of screen tubes the invent... | 10/14/2008 |
| 7412945 | Waste heat boiler A waste heat boiler includes an axial bypass pipe and multiple heat transfer pipes disposed within a cylindrical jacket. A hot exhaust gas stream transported between inlet and outlet ends of the heat transfer pipes is cooled by a coolant. A control system controls g... | 08/19/2008 |
| 7331312 | Waste heat recovery apparatus and method for boiler system An apparatus and method for recovery of waste heat in a boiler system, wherein heat from the hot condensate water in the system, which otherwise would be lost through dissipation, is used for other applications. Particularly, the waste heat energy recovered in the f... | 02/19/2008 |
| 7322317 | Heat-recovery boiler The invention relates to a heat-recovery boiler (3) consisting of a tube bundle heat exchanger (7) which is incorporated into a pressure vessel (2) downstream of a gasification device. Displacement bodies (9) are inserted into pipes which... | 01/29/2008 |
| 7320733 | Electron bombardment heating apparatus and temperature controlling apparatus and control method thereof An electron bombardment heating apparatus, in which thermions emitted from filaments 9 are accelerated and impinge upon a heating plate 2, so as to heat the heating plate 2, wherein a peripheral wall of a heated material supporting member 1 | 01/22/2008 |
| 7296542 | Device for introducing hot gas into a heating surface pipe of a waste heat boiler A device for introducing hot gas into a heating surface tube of a waste heat boiler having an outer tube connected to the boiler wall, in particular to the tube plate, has an inner or inlet tube that is connected to the outer tube by a rounded reversing cap to form ... | 11/20/2007 |
| 7275503 | Heat transfer tube panel module and method of constructing exhaust heat recovery boiler using the module A method of constructing an exhaust heat recovery boiler. A required number of heat transfer tube group panel modules (20) are produced in an appropriate size according to design specifications of HRSG, where the heat transfer tube group panel modules (20 | 10/02/2007 |
| 7270086 | Steam generator A stream generator wherein a continuous evaporating heating surface is disposed in a heating gas duct through which a heating gas flows in an approximately horizontal manner. The continuous evaporating heating surface comprises a plurality of steam-generating pipes ... | 09/18/2007 |
| 7272531 | Aggregation of asset use indices within a process plant A method of monitoring an entity within a process plant wherein the entity includes a plurality of lower level entities, includes acquiring a plurality of use indices, acquiring a plurality of weighting values, and creating an aggregate use index from a combination ... | 09/18/2007 |
| 7243619 | Dual pressure recovery boiler A dual pressure boiler system has a bottom furnace that operates as a low pressure natural circulation steam generating system and a top furnace that operates as a high pressure natural circulation steam generating system. The low pressure natural circulation steam ... | 07/17/2007 |
| 7243618 | Steam generator with hybrid circulation A hybrid vapor generator has at least one evaporator with tubes arranged in sections, one section including a natural circulation loop with a separating drum and downcomer(s), and another section being a pump assisted once-through circulation section. ... | 07/17/2007 |
| 7221988 | Creation and display of indices within a process plant A process control system uses an asset utilization expert to collect data or information pertaining to the assets of a process plant from various sources or functional areas of the plant including, for example, the process control functional areas, the maintenance f... | 05/22/2007 |
| 7204966 | Method and apparatus for improved fired heaters A fired heater is adapted for increasing the output of a plant where the furnace capacity is considerably improved without corresponding increase in the pressure drop. The described technique utilizes a parallel thermal path in contrast to the conventional series th... | 04/17/2007 |
| 7195059 | Heat exchanger and method of performing chemical processes A heat exchanger including a passageway having an internal passage adapted to form a first flow path, and an array of conduits having internal passages that collectively form a second flow path. The conduits extend through the internal passage of the passageway, and... | 03/27/2007 |
| 7191598 | Gas turbine by-pass system A gas turbine by-pass system is used between a gas turbine generator outlet nozzle and the inlet of a heat recovery steam generator (HRSG). The system allows operators to divert gasses from the HRSG in combined cycle mode to a silencer assembly to operate in simple ... | 03/20/2007 |
| 7140328 | Miniature vaporizers for use with chemical converters and energy devices A miniature vaporizer for effectively vaporizing a process fluid (e.g., a liquid media) in small energy system applications, such as systems employing chemical reformers and fuel cells. The vaporizer of the present invention can employ a heating medium, such as a ho... | 11/28/2006 |
| 7100356 | Heat recovery apparatus with aerodynamic diffusers A sound attenuating duct unit suitable for connection to an outlet of a gas turbine and an improved heat recovery apparatus for use with such a turbine are disclosed. The former unit includes a duct housing having exterior sides, an air inlet at one end and first an... | 09/05/2006 |
| 7059134 | Gas seal apparatus and method for use in cogeneration applications A cogeneration system having a gas turbine generator (10) that provides combustion air via an exhaust to a heat recovery steam generator (13) has a gas-seal stack (19) coupled there between. The gas-seal stack (19) prevents substantial po... | 06/13/2006 |
| 7055465 | Water heater having waste gas disposal structure A water heater includes a housing, an air box, two windproof hoods, and a catalyst converter. Thus, the catalyst converter converts the carbon monoxide produced during the combustion process of the burner into the carbon dioxide and the water, thereby preventing the... | 06/06/2006 |
| 7036461 | Waste-heat boiler for a Clause plant The invention relates to a waste-heat boiler (3) for a Claus plant, comprising a steam generation chamber that is surrounded by a pressure-proof jacket (14), a long tube bundle (18) of heat exchanger tubes that extend through the steam generatio... | 05/02/2006 |
| 7033420 | Process and apparatus for the thermal degassing of the working medium of a two-phase process A process is disclosed for thermally degassing a condensate or feedwater by heating the condensate or feedwater in a feedwater vessel/degassing means, to which preheated condensate is fed and from which feedwater for heating surfaces heated in a heat recovery steam ... | 04/25/2006 |
| 7032390 | Method for recovery of VOC gas and an apparatus for recovery of VOC gas Recovered, compressed VOC gas is used as fuel for a steam system where the steam produced is used for the operation of one or more compressors (26,28,30) that are used for the compression of the VOC gas. ... | 04/25/2006 |
| 7021248 | Passive system for optimal NOx reduction via selective catalytic reduction with variable boiler load A passive system for recovering energy and nitrogen oxides from flue gas produced by a boiler, and which employs a particular arrangement of economizer surface to ensure that the temperature of the flue gas entering a selective catalytic reduction (SCR) reactor is m... | 04/04/2006 |
| 7017529 | Boiler system and method of controlling a boiler system A boiler system including a first manifold, a second manifold provided at an elevation above the first manifold, and a heat exchanger conduit fluidly connecting the first and second manifolds. The conduit is provided within a first fluid flow, and the heat exchanger... | 03/28/2006 |
| 7004086 | Injection of overfire air through the upper furnace arch for penetration and mixing with flue gas The boiler nose or arch of a furnace projects into the upwardly flowing flue gas to form a restricted passage. Overfire air is introduced into the cavity or plenum of the boiler nose and flows to injection ports along the inclined surface of the boiler nose to provi... | 02/28/2006 |
| 7005866 | Apparatus and process for detecting condensation in a heat exchanger A feedwater heater for an HRSG is provided with a monitoring unit for detecting the presence of condensation in the feedwater heater. The monitoring unit includes a dielectric band around one of the tubes of the feedwater heater near the location where the feedwater... | 02/28/2006 |
| 6996989 | Process to recover energy from hot gas A process to recover energy from a gas having a temperature of above 650° C. and an absolute pressure of more than 1.7 bar and having non-solidified alkali containing compounds and particles by performing the following steps: (a) cooling the gas to a t... | 02/14/2006 |
| 6990930 | Steam generation apparatus and method In one aspect, the invention provides a steam generation apparatus that is liquid fuel fired and addresses conversion of gaseous fuel SIB units to operate with liquid fuel. The invention also relates to a conversion unit for a steam injection boiler, a method for co... | 01/31/2006 |
| 6957540 | Multi-mode complex cycle power plant A power plant (10) including a boiler unit portion (12) and a gas turbine unit portion (14) operable in multiple modes, including operation of the boiler unit portion independent of the gas turbine unit portion. Exhaust gas from the gas turbine ... | 10/25/2005 |
