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| Number | Title | Issue Date |
| 7862789 | Circulating fluidized bed power plant having integrated sulfur dioxide scrubber system with lime feed A circulating fluidized bed power plant 100 includes; a circulating fluidized bed boiler 110 which generates flue gases, a flash dry absorber scrubber 140 configured to receive the flue gases from the circulating fluidized bed boiler 110,... | 01/04/2011 |
| 7435400 | Optimizing post-combustion nitrogen oxide and sulfur dioxide reductions and improving combustion efficiency in coal fired boilers A method for increasing the nitrogen oxide emissions by either removing or modifying fuel rich nitrogen oxide (NOx) reduction processes thereby improving combustion efficiencies especially with low volatile low sulfur coals, and remove unburned carbon, re... | 10/14/2008 |
| 7427385 | Systems and processes for reducing the sulfur content of hydrocarbon streams Systems and processes for removing a first sulfur compound from a hydrocarbon stream. The systems and process utilize at least one reaction vessel incorporating a hydrolysis catalyst suitable for hydrolyzing the first sulfur compound to a second sulfur compound. The... | 09/23/2008 |
| 7427384 | Method of reducing sulfur dioxide emissions of a circulating fluidized bed boiler A method of reducing sulfur dioxide emissions of a circulating fluidized bed boiler. Sulfur-containing carbonaceous fuel is fed to a furnace of the boiler, and calcium carbonate is fed to the furnace at a rate relative to the first stream such that the molar ratio o... | 09/23/2008 |
| 7404940 | Method for flue-gas reduction of pollutants in combustion processes Systems and methods for reduction of pollutants in combustion processes using combined rotating opposed fired air (ROFA) and fuel injection sorbents (FSI) for increased chemical reactivity. ... | 07/29/2008 |
| 7323021 | Ash reactivation Sulphur control in fluidized bed combustion systems often involves adding a source of calcium to the combustor so that the calcium may combine with the sulphur. Ash resulting from such combustion often contains a significant amount of calcium which does not combine ... | 01/29/2008 |
| 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 |
| 7247285 | Reduction of sulfur, nitrogen oxides and volatile trace metals from combustion in furnaces and boilers A method for reducing the cost of emission control by utilizing a combination of low cost, combustion and post-combustion processes to eliminate emissions of sulfur and nitrogen oxides, and trace metals, including mercury, and trace dioxins and furans. These process... | 07/24/2007 |
| 7067456 | Sorbent for separation of carbon dioxide (CO) from gas mixtures A reaction-based process has been developed for the selective removal of carbon dioxide (CO2) from a multicomponent gas mixture to provide a gaseous stream depleted in CO2 compared to the inlet CO2 concentration in the stream. The pr... | 06/27/2006 |
| 7022296 | Method for treating flue gas A multiple-field precipitator, flue-gas treating device, in accordance with the principles of the invention, includes a first section having a dual-function, sensible-cooling heat exchanger/electrostatic precipitator, a second section having a wet electrostatic prec... | 04/04/2006 |
| 6946102 | Apparatus for the remediation of particulate material and toxic pollutants in transit in flue gas The invention is in an apparatus for the remediation of particulate material and gaseous pollutants from a flue gas flow that is simple and highly efficient in removing nearly all toxic pollutants, particularly sulfur dioxide, from a flue gas flow, and includes a ma... | 09/20/2005 |
| 6817304 | Process for generating heat to reduce the emission of oxides of sulphur and reduce adsorbent consumption For reducing emissions of oxides of sulphur: a) a sulphur-containing fuel is burned in a combustion zone comprising a heat exchange zone in which at least a portion of the heat is extracted, and effluents or combustion fumes are recovered at a temperatu... | 11/16/2004 |
| 6780385 | Method for treating a gas A method for treating a gas containing a SO3 component, which comprises adding a sodium carbonate powder having a mean particle diameter of at most 20 μm to the gas to remove the SO3 component from the gas. ... | 08/24/2004 |
| 6749820 | Chloride/sulfate removal system The liquid cooling spray in a gas conditioning chamber is modified by the addition of an alkali to scrub sulfuir dioxide and other acid forming gases and a separation unit to remove particles that may contain either unreacted alkali or salts of the acid forming gase... | 06/15/2004 |
| 6743405 | Low temperature sorbents for removal of sulfur compounds from fluid feed streams A sorbent material is provided comprising a material reactive with sulfur, a binder unreactive with sulfur and an inert material, wherein the sorbent absorbs the sulfur at temperatures between 30 and 200° C. Sulfur absorption capacity as high as 22 weight percent h... | 06/01/2004 |
| 6737031 | Method of simultaneously reducing CO2 and SO2 emissions in a combustion installation The method of simultaneously reducing carbon dioxide (CO2) emissions and sulfur dioxide (SO2) emissions produced by the combustion of carbon-containing matter in a hearth consists in injecting into the hearth a calcium-based agent, a fraction o... | 05/18/2004 |
| 6722295 | Method for the combined reduction of nitrogen oxide and sulfur dioxide concentrations in the furnace region of boilers A method for the combined reduction of sulfur dioxide, SO2, and nitrogen oxides, NOx, in the gas stream of a furnace from the combustion of fossil fuels is disclosed. In a narrow gas temperature zone in a furnace, NOx is converted to... | 04/20/2004 |
| 6685902 | Procedure and apparatus for the cleaning of flue gases containing sulfur dioxide A process for cleaning flue gases containing ash and sulfur dioxide produced by burning sulfur-containing coal in the combustion chamber of a circulating fluidized-bed firing system includes delivering a particulate SO2 sorbent into the combust... | 02/03/2004 |
| 6464952 | Sulfur dioxide abatement method A pollution control apparatus and method to scrub sulfur dioxide uses a lime slurry consisting of small diameter hydrated lime particles injected into the cooling water of a gas cooling tower. The diameter of the lime slurry particles is selected to be le... | 10/15/2002 |
| 6383464 | Method for reducing sulfur-oxide emissions from an asphalt air-blowing process A method for substantially reducing sulfur-oxide emissions from an asphalt air-blowing process involves adding an emission-reducing additive to the asphalt prior to air-blowing, or early in the air-blowing process, and filtering the flue gases produced in... | 05/07/2002 |
| 6372187 | Alkaline sorbent injection for mercury control A mercury removal system for removing mercury from combustion flue gases is provided in which alkaline sorbents at generally extremely low stoichiometric molar ratios of alkaline earth or an alkali metal to sulfur of less than 1.0 are injected into a powe... | 04/16/2002 |
| 6290921 | Method and apparatus for binding pollutants in flue gas A method of binding pollutants, such as sulfur dioxide, hydrochloric acid and/or hydrofluoric acid, in flue gas in one or more combustion plants. The method includes the steps of (a) combusting fuel in a furnace of the one or more combustion plants, resul... | 09/18/2001 |
| 6290872 | Composition containing at least sodium bicarbonate, preparation method therefor and uses thereof A composition having sodium bicarbonate, sodium carbonate, and ammonia in the form of ammonium salts is formed by heat treating ammoniacal bicarbonate at a temperature between 20 and 150° C. A method of using the composition includes reacting the composi... | 09/18/2001 |
| 6284208 | Method for removing mercury and sulfur dioxide from gases A process is provided for the removal of mercury and sulfur dioxide out a flue gas from, for example, power stations, smelters, waste incineration plants and crematories, by washing the flue gas with an oxidized, chloride-containing washing water, which m... | 09/04/2001 |
| 6228336 | Dust collecting method A dust collecting apparatus and method for dedusting a Ca-containing gas using a ceramics filter is provided, in which a filter differential pressure elevation rate is suppressed. A desulferizing agent 103 and a mineral 106 containing MgO are supplied via... | 05/08/2001 |
| 6214308 | Process for removal of nitric oxides and sulfur oxides from flue gases A two stage method is described for the removal of NOx and SOx from flue gas. The first stage removes all NOx by sodium sulfite sorbent injection. The second stage removes SOx by sodium bicarbonate injection. Th... | 04/10/2001 |
| 6180074 | Method for processing flue gases containing sulphur oxides A method for removing contaminants, such as sulfur dioxide, mercury and hydrochloric acid, out of flue gases is provided, said method including the steps of: treating the flue gases with a reagent, such as sodium carbonate, sodium bicarbonate and ammonium... | 01/30/2001 |
| 6146607 | Process for producing highly reactive lime in a furnace A limestone furnace calcination process involves injecting finely divided limestone particles into a zone in a furnace at which the temperature of the flue gas stream, as it passes through the zone, is above the minimum calcination temperature and below t... | 11/14/2000 |
| 6123910 | Method of predicting and controlling harmful oxide and apparatus therefor The present invention provides a method and an apparatus for predicting and calculating an amount of harmful oxide such as NOx contained in an exhaust gas from a reference concentration of harmful oxide, which is previously determined by a type of fuel su... | 09/26/2000 |
| 6096279 | Flue gas treating process and system Flue gas is treated for the presence of SO3, without resorting to ammonia injection, by adding a powder into the flue gas and subsequently bringing the flue gas into gas-liquid contact with an absorbing fluid, whereby the SO2 present... | 08/01/2000 |
| 6074620 | Method for the cleaning of exhaust gas and prevention of explosions therein A powdered medium for the cleaning of exhaust gases, e,g. smoke and gases from industrial chimneys, employing the principle of dry adsorption, which includes a mixture of activated cokes with inert materials which have no dust explosiveness To prepare a m... | 06/13/2000 |
| 5993765 | Process for the dry desulfurization of a combustion gas The process for dry desulfuration of a combustion gas includes providing an electrostatic precipitator (12) or an inertia force separator for dedusting; dedusting the combustion gas at temperatures of 100° C. to 180° C. in the electrostatic precipitator... | 11/30/1999 |
| 5980848 | Method for production of sodium bicarbonate, sodium carbonate and ammonium sulfate from sodium sulfate There is disclosed a process for recovering sodium bicarbonate and forming ammonium sulfate from a source containing sodium sulfate. The method involves contacting the sodium sulfate in solution with carbon dioxide and a compound containing ammonia. Sodiu... | 11/09/1999 |
| 5935539 | Reactive composition and method for the purification of a nitric oxide containing gas A process for removing nitrogen oxides and/or sulfur oxides and/or hydrogen chloride out of a gas, for example from the combustion of fuel or the incineration of waste, by injecting a mixture of a peroxide compound such as sodium percarbonate and an alkal... | 08/10/1999 |
| 5814288 | Flue gas desulfurization method and apparatus A combined furnace limestone injection and dry scrubber flue gas desulfurization (FGD) system collects solids from the flue gas stream in first particulate collection device located downstream of an outlet of a convection pass of the furnace and upstream ... | 09/29/1998 |
| 5785938 | Process using recyclable sorbents for the removal of sox from flue gases and other gas streams A process for removing and then capturing noxious sulfur oxides from gas streams, particularly from the flue gases of coal-burning power plants, using Ni-containing heated layered double hydroxide (LDH) as recyclable sorbents. The sorbent compositions con... | 07/28/1998 |
| 5779464 | Calcium carbonate sorbent and methods of making and using same A novel CaCO3 sorbent with its physical properties tailored for high SO2 removal is produced in accordance with the present invention. The surface area, porosity and the distribution of pore sizes of the sorbent have been designed an... | 07/14/1998 |
| 5653944 | Slurry filtration device and flue-gas desulfurization system This invention is related to a slurry filtration device and the wet lime-gypsum flue-gas desulfurization system comprising a slurry filtration device for the separation (concentration) of gypsum. The slurry filtration device comprises tank that has a slur... | 08/05/1997 |
| 5651948 | Low pressure drop, turbulent mixing zone dry scrubber Contaminants such as sulfur oxides are removed from flue gas in a low pressure drop, turbulent mixing zone, vertical dry scrubber by channeling the flue gas through a low pressure drop gas distribution means which controls flue gas introduction to the scr... | 07/29/1997 |
| 5647892 | Method for acid gas emission control An improved apparatus and process is provided for scrubbing sulphur oxide gas from combustion flue gas with wet limestone particles as a reactive scrubbing agent. The process is carried out in a moving bed reactor having louvered inlet and outlet sides wh... | 07/15/1997 |
