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| Number | Title | Issue Date |
| 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 |
| 7013817 | Method for reducing the amount of a pollutant in a flue gas resulting from the combustion of a fossil fuel A process for removal of a pollutant from a flue gas. An alkaline admixture is coated with a coating agent that improves dispersability and delays calcination of the alkaline admixture within a combustion zone and results in a coated alkaline admixture. The coated a... | 03/21/2006 |
| 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 |
| 5795367 | Method of and apparatus for reducing sulfur in combustion gases A method for reducing the sulfur content in combustion gases from burning coal includes the steps of applying opposite electrostic charges to fuel particles and to reaction particles, and mixing the oppositely charged particles prior to combustion to faci... | 08/18/1998 |
| 5585081 | SOx, NOx and particulate removal system A method for controlling emissions of a fossil fuel fired boiler including a high temperature fabric filter house with an SCR catalyst situated therein for receiving flue gases along with an injected ammoniacal compound and sorbent. The sorbent reacts wit... | 12/17/1996 |
| 5571490 | Method and means for exploiting fuel having high sulfur content High sulfur content fuel is combusted in the presence of oil shale containing significant amounts of calcium carbonate so that the sulfur and calcium carbonate oxidize and react to form calcium sulfate particulate which captures the sulfur and in the fuel... | 11/05/1996 |
| 5508013 | Process for the production of sulphur from at least one sour gas containing hydrogen sulphide and a fuel effluent and thermal reactor A process is provided for the production of sulphur from at least one sour gas containing H2 S and a gaseous or liquid fuel effluent, of the type comprising a thermal reaction step, wherein the thermal reaction step is conducted by performing t... | 04/16/1996 |
| 5238666 | Process for separating sulfur compounds from flue gases A process for desulfurization of fuel combustion gases and a new reactor wherein the primary flue gas stream containing sulfur oxides and alkaline oxide solids flows into the reactor vessel. A plurality of baffle columns is positioned at the top of the re... | 08/24/1993 |
| 5202101 | Regenerative process and system for the simultaneous removal of particulates and the oxides of sulfur and nitrogen from a gas stream A process and system for simultaneously removing from a gaseous mixture, sulfur oxides by means of a solid sulfur oxide acceptor on a porous carrier, nitrogen oxides by means of ammonia gas and particulate matter by means of filtration and for the regener... | 04/13/1993 |
| 5122353 | Reduction of sulfur emissions from coal-fired boilers SOx reduction treatments involving sorbent addition to coal-fired boilers is improved by retrofitting the boiler to burn fuel oil-in-water emulsions as a replacement for at least a portion of the coal. The ratio SOx removed to partic... | 06/16/1992 |
| 5058514 | Process for controlling acid gas emissions in power plant flue gases An in-furnace sorbent slurry injection process for the simultaneous control of SO2 and NOx from power plant flue gases is described. An aqueous slurry of limestone or dolomite-doped limestone and a nitrogenous progenitor compound is ... | 10/22/1991 |
| 5011400 | Controlled flow split steam burner assembly with sorbent injection A burner assembly in which an inlet is located at one end of an annular passage for receiving fuel, and an outlet is located at the other end of the passage for discharging the fuel. A register assembly is provided which includes an enclosure for receivin... | 04/30/1991 |
| 5002743 | Process for the removal of sulfur dioxide from hot flue gases The invention relates to a process for the removal of sulfur dioxide from hot flue gases (8) which have been obtained by burning a sulfur-containing substance (4) in a boiler (1). In the process, a substance (6), such as lime or limestone, which reacts wi... | 03/26/1991 |
| 4981667 | Removal of sulfur from petroleum coke with lime The sulfur in petroleum pitches and cokes can be converted to calcium sulfate instead of sulfur dioxide during combustion when calcium oxide or calcium carbonate is added to the molten pitch before burning.... | 01/01/1991 |
| 4960577 | Enhanced sorbent injection combined with natural gas reburning for a sox control for coal fired boilers A method is provided for reducing the sulfur content of exhaust gases from a combustion installation comprising the steps of calcining the dry sorbent particles in a controlled temperature environment outside of the combustion installation, forming an aqu... | 10/02/1990 |
| 4917874 | Desulfurization process Alkali metal sulfates are converted to a sulfur-free form by dissolving the alkali metal sulfate in water to produce an aqueous solution containing alkali metal ions and sulfate ions at a pH below about 8, and then passing the solution through a weak base... | 04/17/1990 |
| 4780291 | Process for removing sulfur gases from a combustion gas Solid carbonaceous fuel, such as bituminous coal, is copulverized with a basic metal reactant to provide a microground prepared fuel predominantly in minus 325 mesh particles of high specific surface area. The prepared fuel is fed directly to a burner and... | 10/25/1988 |
| 4758418 | Process for combusting solid sulfur-containing material An improved process for converting hydrocarbons using a catalyst which is periodically regenerated to remove carbonaceous deposits, the catalyst being comprised of a mixture containing, as a major component, solid particles capable of promoting hydrocarbo... | 07/19/1988 |
| 4746498 | Process for reducing gaseous sulfur dioxide content of flue gases by preheating coals prior to burning such coals and by controlling combustion temperature levels The present invention contemplates a process for reducing the gaseous sulfur dioxide content of flue gases by either or both preheating coal prior to burning the preheated coal and controlling the combustion temperature level to control the amount of sulf... | 05/24/1988 |
| 4696804 | Method for treating SO2, SO3 and dust simultaneously Here is disclosed a method for treating SO2, SO3 and a dust simultaneously which comprises causing an exhaust gas containing at least SO2, SO3 and the dust to pass through a dry dust collector in order to remove... | 09/29/1987 |
| 4676960 | Process for concentrating waste products arising during the manufacture of carbon electrodes The solid, liquid and gaseous waste products which arise during the manufature of carbon electrodes are concentrated. First, the solid electrode waste is mixed with the carbon-rich dusts from crushing operations, and with lime or lime and gypsum (from a wet ... | 06/30/1987 |
| 4645654 | Reducing sulfur content in flue gases produced by coal combustion A process for reducing the sulfur oxide content of flue gases produced by combustion of sulfur-containing coal containing cations of alkali metals, alkaline earth metals, or both, in ion exchangeable form. Flue gases containing sulfur oxides are recycled ... | 02/24/1987 |
| 4622213 | Sulfur dioxide removal from gas streams A process for absorbing sulfur dioxide from a gas stream comprising contacting said gas stream with a slurry of pretreated shale in an aqueous medium wherein the shale acts catalytically to convert the sulfite radical to the sulfate radical.... | 11/11/1986 |
| 4613487 | Flue gas desulfurization process Flue gas is desulfurized by mixing into the combustion zone a finely divided sorbent such as calcium carbonate and, downstream of the mixing point, reactivating the sorbent by spraying the gaseous suspension with an aqueous solution of solubilizing agent ... | 09/23/1986 |
| 4609538 | Scrap heating method During the heating of scrap in a container using sulfur-containing fuels for combustion, CaO, Ca(CO)2, or CaCO3 powder is injected into the container to fix sulfur oxides generated during the combustion mainly as CaSO4. Th... | 09/02/1986 |
| 4603037 | Desulfurization of flue gas from multiple boilers Flue gases from two or more boilers are treated for reduction of their sulfur dioxide content by injecting as sorbent fine limestone or dolomite into one of the boilers, recovering a mixture of spent and calcined sorbent from the resulting flue gas, hydra... | 07/29/1986 |
| 4588568 | Method of binding sulfur compounds, which result as reaction products during the combustion of sulfur-containing fuels, by addition of additives A method of binding sulfur compounds, which result as react products during the combustion of sulfur-containing fuels in firing equipment, by the addition of additives. A mixture of alkali carbonate and an alkaline earth oxide, for example a mixture of so... | 05/13/1986 |
| 4562054 | Treatment of flue gas A method of removing acid gases from hot flue gases wherein the flue gas is fed through a pipe (3) and up through a tubular reaction chamber (1) having a diverging bottom wall (2) which causes a rapid reduction in axial velocity. Further flue gas is intro... | 12/31/1985 |
| 4555392 | Portland cement for SO2 control in coal-fired power plants There is described a method of removing oxides of sulfur from the emissions of fossil fuel combustion by injecting portland cement into the boiler with the fuel, the combustion air, or downstream with the combustion gases. There is also described the ceme... | 11/26/1985 |
| 4547351 | Flue gas desulfurization A process and apparatus for removing sulfur oxide from combustion gas to form Na2 SO4 and for reducing the harmful effects of Na2 SO4 on auxiliary heat exchangers in which a sodium compound is injected into the ... | 10/15/1985 |
| 4540555 | Method of removing sulfur dioxide and other toxic and noxious components from flue gases A method of and an apparatus for the desulfurization of the flue gases from a fossil fuel power plant. A particulate absorbent is contacted with the flue gases in a dry desulfurization step, particulates being then separated from the flue gas and being ut... | 09/10/1985 |
| 4530291 | Separating spent and unreacted particles of calcium-based sulfur sorbent A fluidized bed combustor is utilized as a source of drains, including spent calcium-based sorbent. The reacted sorbent is broken to expose unreacted portions which can be recycled to capture additional sulfur compounds. A separation is provided by a magn... | 07/23/1985 |
| 4525142 | Process for treating flue gas with alkali injection and electron beam A process uses limestone injection into a combustion boiler burning pulverized coal or liquid hydrogen fuel. Effluent gas from the boiler is humidified and cooled to below 200° F. During the humidifying and cooling step, sulfur dioxide removal occurs in ... | 06/25/1985 |
| 4523532 | Combustion method A method and apparatus for combustion of a sulfur-containing fuel which substantially reduces the amount of gaseous sulfur compounds which would otherwise be emitted. A source of oxygen, a sulfur-containing fuel, and an inorganic alkaline absorbent are re... | 06/18/1985 |
| 4519995 | Method of desulfurizing flue gases of coal firings In a method for desulfurizing flue gas generated in coal combusting plants, the coal is burned in the presence of a dry additive material, such as CaCO optionally in presence of recycled cold flue gas whereby additive material which has not reacted is dis... | 05/28/1985 |
| 4517165 | Combustion method A method and apparatus for combustion of a sulfur-containing fuel which substantially reduces the amount of gaseous sulfur compounds which would otherwise be emitted. A source of oxygen, a sulfur-containing fuel, and an inorganic alkaline absorbent are re... | 05/14/1985 |
| 4508573 | Co-production of cementitious products A method and apparatus for thermally reacting one or more inorganic materials, the method involves the step of maintaining a flame in a combustion chamber at a predetermined reaction temperature by supplying a sufficient quantity of a hydrocarbon fuel and... | 04/02/1985 |
| 4439406 | Method of capturing sulfur A fluidized bed boiler, and a method of operating same in which air is passed through a grate to fluidize a bed of particulate material containing fossil fuel disposed on the grate. A raw acceptor for the sulfur produced as a result of the combustion of t... | 03/27/1984 |
| 4387653 | Limestone-based sorbent agglomerates for removal of sulfur compounds in hot gases and method of making Sulfur-containing compounds such as hydrogen sulfide and sulfur oxides arising from gasification or combustion of organic fuels such as coal may be removed from the hot gases by attrition resistant, highly reactive limestone-based sorbent agglomerates. Th... | 06/14/1983 |
| 4371150 | Sintering plant A sintering plant of the type sintering raw materials, such as pulverized ores, while transporting them with a conveyor, in which quicklime is fed to the lower layer of the raw materials on the conveyor so that SOx produced during sintering pro... | 02/01/1983 |
