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| Number | Title | Issue Date |
| 7845292 | Process for slag and corrosion control in boilers A slag and corrosion control process is described. The process entails: identifying the location of at least one slagging problem area in a boiler; introducing a slag control chemical comprising magnesium oxide or hydroxide into combustion gases in a location identi... | 12/07/2010 |
| 7475646 | System and method for decreasing a rate of slag formation at predetermined locations in a boiler system A system and a method for decreasing a rate of slag formation at predetermined locations in a boiler system are provided. The boiler system has a plurality of burners, a plurality of slag detection sensors, a plurality of temperature sensors and a plurality of CO se... | 01/13/2009 |
| 7409838 | Reducing corrosion and particulate emission in glassmelting furnaces A glassmelting furnace is heated by combustion of fuel having an atomic ratio of hydrogen to carbon of 0.9 or less. ... | 08/12/2008 |
| 7332002 | Low sulfur coal additive for improved furnace operation The present invention is directed to additives for coal-fired furnaces, particularly furnaces using a layer of slag to capture coal particles for combustion. The additive(s) include iron, mineralizer(s), handling aid(s), flow aid(s), and/or abrasive material(s). The... | 02/19/2008 |
| 7332143 | Targeted duct injection for SOcontrol NOx and SO3 emissions from combustion of a sulfur containing carbonaceous fuel are reduced simultaneously. The combustion gases comprising NOx and SO2 are mixed with a NOx control agent into the combustion gases... | 02/19/2008 |
| 7276217 | Reduction of coal-fired combustion emissions A process for mitigation of fouling deposits within a combustion zone, capturing of toxic metal emissions, and reduction of visible sulfur emissions attributable to sulfuric acid mist during coal combustion. SO3 formed during coal combustion is reduced by... | 10/02/2007 |
| 7261046 | System and method of reducing pulverizer flammability hazard and boiler nitrous oxide output The present invention is a system and method of reducing nitrogen oxides in coal combustion exhaust gases and preventing fire and explosion in pulverized coal systems. The present invention first cools the flue gas exiting a boiler of the pulverized coal system with... | 08/28/2007 |
| 7231874 | Power supplies for projectiles and other devices A method for generating power in a device is provided. The method includes: generating power from an inherent characteristic of the device; and supplying the generated power to at least one power consuming element associated with the device. Preferably, the inherent... | 06/19/2007 |
| 7162960 | Process for reducing plume opacity Plume is mitigated by targeting treatment chemicals to locations in a furnace, which are connected with plume opacity. The effectiveness of targeted in furnace injection, in fuel introduction and in furnace introduction of slag and/or corrosion and/or plume control ... | 01/16/2007 |
| 6997119 | Combustion emissions control and utilization of byproducts A process for controlling both fireside ash deposits and corrosion, and fouling, corrosion, and emissions due to SO3 formation within a fossil-fuel-fired combustion system, such as a furnace forming part of an electrical power generating plant. A solution... | 02/14/2006 |
| 6978726 | Combustion with reduced carbon in the ash Combustion of coal in which oxygen is injected into the coal as it emerges from burner produces ash having reduced amounts of carbon. ... | 12/27/2005 |
| 6928937 | Sootblowing control based on boiler thermal efficiency optimization The present invention provides a process for the control of a cleaning system for a boiler which incorporates factors related to the overall operation and efficiency of the boiler. Current values of plant data parameters associated with the boiler furnace are compar... | 08/16/2005 |
| 6915751 | Method and apparatus for processing a pulverulent or particulate material In a fluid bed apparatus in which a layer of pulverulent or particulate material is fluidized by means of fluidizing gas which is introduced through openings in a bed plate in a first plurality of streams of flows of gas, means are provided for introducing a second ... | 07/12/2005 |
| 6883443 | Method for reduction of slagging and fouling of the waterwalls and of the firebox and superheater and reheater of steam boilers with coal combustion The present invention is a method for reducing the slagging and fouling of the surfaces of the waterwalls, firebox, superheater, and reheater of the furnace of a coal-fired steam boiler. The process reduces the firebox exit temperature to below the specific ash melt... | 04/26/2005 |
| 6848373 | Method of monitoring heat flux and controlling corrosion of furnace wall tubes In a method of measuring heat flux and corrosion in a furnace, pairs of thermocouples are attached to the back side of the furnace wall. One thermocouple of each pair is attached to a tube and the second thermocouple is attached to a web connected to that tube. A te... | 02/01/2005 |
| 6729872 | Method for protecting an SiO2 coating, and combustion device with protection A method for protecting a SiO2 coating on defining surfaces of a combustion chamber and a combustion device containing the protection. Accordingly, an additive is introduced into the combustion chamber, which increases the SiO content of the exhaust gas, ... | 05/04/2004 |
| 6694899 | Use of expanded agents for minimizing corrosion and build-up of deposits in flue-gas systems A method for minimizing corrosion and the build-up of deposits on surfaces of a flue-gas system exposed to moist substances and elevated temperatures, and particularly those surfaces which are used to convey other additives to the system and the surfaces ... | 02/24/2004 |
| 6615751 | Method for reducing agglomeration, sintering and deposit formation in gasification and combustion of biomass The present invention relates to a method for reducing agglomeration, sintering and deposit formation resulting from the gasification or combustion of a solid carbonaceous fuel material comprising a combustible portion and a non combustible inorganic port... | 09/09/2003 |
| 6517341 | Method to prevent recession loss of silica and silicon-containing materials in combustion gas environments While silicon-containing ceramics or ceramic composites are prone to material loss in combustion gas environments, this invention introduces a method to prevent or greatly reduce the thickness loss by injecting directly an effective amount, generally in t... | 02/11/2003 |
| 6478948 | Method of monitoring and controlling corrosion of furnace boiler tubes A method for monitoring and reducing corrosion in furnace boiler tubes measures electrochemical noise associated with corrosion mechanisms while corrosion is occurring at the surface of the tubes as they are exposed to combustion products. This noise is d... | 11/12/2002 |
| 6352041 | Method for preventing corrosion of a furnace A method for preventing corrosion of a furnace by a corrosive gas. The material for the bottom tray in the furnace is made of anti-corrosion alloy such as molybdenum and chromium. The furnace also has an oxygen-containing gas pipe for charging the oxygen-... | 03/05/2002 |
| 6318277 | Method for reducing NOx emissions with minimal increases in unburned carbon and waterwall corrosion A method and apparatus for reducing NOx emissions in a furnace having a main combustion zone with a waterwall and apparatus for supplying main combustion air and fuel to the main combustion zone, also reduces unburned carbon and waterwall corrosion in the... | 11/20/2001 |
| 6318088 | Heat recovery system and power generation system In an improved system for recovering heat from a combustion gas produced by burning wastes, the combustion gas or combustible gas produced by partial burning of the wastes subjected to dust filtration in a temperature range of 450-650° C. at a filtration... | 11/20/2001 |
| 6302039 | Method and apparatus for further improving fluid flow and gas mixing in boilers This invention improves fluid flow, gas mixing and combustion in the furnaces of recovery boilers which burn liquor from various pulping processes, namely, the kraft process, the soda process, the sodium-based sulphite process, the closed-cycle CTMP (chem... | 10/16/2001 |
| 6301896 | Heat recovery system and power generation system In an improved system for recovering heat from a combustion gas produced by burning wastes, the combustion gas or combustible gas produced by partial burning of the wastes subjected to dust filtration in a temperature range of 450-650° C. at a filtration... | 10/16/2001 |
| 6298666 | Heat recovery system and power generation system In an improved system for recovering heat from a combustion gas produced by burning wastes, the combustion gas or combustible gas produced by partial burning of the wastes subjected to dust filtration in a temperature range of 450-650° C. at a filtration... | 10/09/2001 |
| 6293781 | Method of and apparatus for decreasing attack of detrimental components of solid particle suspensions on heat transfer surfaces A method of and apparatus for decreasing attack of detrimental components of solid particle suspensions on heat transfer surfaces in a heat transfer chamber in a fluidized bed reactor. The method includes introducing solid particles into a first chamber, ... | 09/25/2001 |
| 6269754 | Steam generator for superheated steam for incineration plants with corrosive flue gases The invention relates to a steam generator (1) for superheated steam for incineration plants with corrosive flue gases, essentially comprising a radiation section (2) and a convection section (5), having at least one superheater (8) and having plates (10)... | 08/07/2001 |
| 6192811 | Air nozzle for a furnace An air nozzle for introducing secondary air into a furnace and including a housing provided with an inlet at one end thereof for receiving air and an outlet at the other end thereof for discharging the air. A damper is disposed in the housing in the path ... | 02/27/2001 |
| 6120281 | Combustion method utilizing tangential firing A combustion method in which a coal/primary air mixture is discharged from burners located in the corners of the furnace towards an imaginary circle disposed in the center of the furnace. Air is discharged from air nozzles also located in the corners of t... | 09/19/2000 |
| 6085673 | Method for reducing waterwall corrosion in low NOx boilers A method to reduce waterwall corrosion in a low NOx boiler includes the steps of locating a waterwall area of a low NOx boiler where oxidizing conditions exist and deposition of FeS is likely. The combustion air input at the waterwal... | 07/11/2000 |
| 6024028 | Protection of the air ports of a recovery boiler A method and apparatus for extending the life of air ports and nozzles in furnaces, particularly recovery boilers for burning black liquor to produce heat and a chemical melt. Apparatus is provided for feeding combustion air into a furnace having a tube w... | 02/15/2000 |
| 5988080 | Waste heat recovery system and power generation system with dust filtration In an improved system for recovering heat from a combustion gas produced by burning wastes, the combustion gas or combustible gas produced by partial burning of the wastes subjected to dust filtration in a temperature range of 450-650° C. at a filtration... | 11/23/1999 |
| 5894806 | Process for increasing the effectiveness of slag and/or corrosion control chemicals for combustion units Reduction of slagging is improved by targeting slag-reducing chemicals in a furnace with the aid of computational fluid dynamic modeling. Chemical utilization and boiler maintenance are improved.... | 04/20/1999 |
| 5809913 | Corrosion protection for utility boiler side walls A method for reducing the rate of side wall corrosion in a coal-fired utility boiler. A plurality of side wall slots are provided in the side walls of the boiler so that a protective layer of air may be introduced through the slots and propelled upward by... | 09/22/1998 |
| 5740745 | Process for increasing the effectiveness of slag control chemicals for black liquor recovery and other combustion units Reduction of slagging is improved by targeting slag-reducing chemicals in a furnace with the aid of computational fluid dynamic modeling. Chemical utilization and boiler maintenance are improved.... | 04/21/1998 |
| 5543116 | Method for reducing NOx using atomizing steam injection control A method and apparatus for controlling NOx produced by a natural gas fired combustion source includes establishing a control curve for the combustion source for indicating NOx levels based on steam injection rates and fuel flow rates... | 08/06/1996 |
| 5462429 | Mechanical wiper for waste gas incinerator A mechanical wiper mounted within an incinerator for waste gases, such as silane, and said wiper adapted to move adjacent selected internal surface areas to remove combustion products buildup on such selected areas.... | 10/31/1995 |
| 5368617 | Process for reducing sulfur emissions with calcium-containing sorbents An improved process for reducing sulfur oxide emissions from the combustion of coal is disclosed wherein a fuel mixture comprising calcium-containing sorbent and coal is fed to the burners and sulfur oxides react with calcium from the sorbent in a high te... | 11/29/1994 |
| 5307743 | Apparatus for deslagging a cyclone furnace A method and apparatus for deslagging a cyclone furnace in which a series of flexible hollow tubes are inserted into the combustion chamber and the explosive charges in each hollow tube are detonated sequentially. Each of the hollow tubes is biased outwar... | 05/03/1994 |
