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| Number | Title | Issue Date |
| 8173090 | Sorbent use with oxyfuel sour compression Sulfur dioxide (SO2) is removed from carbon dioxide feed gas comprising SO2 as a contaminant by maintaining the carbon dioxide feed gas at an elevated pressure in contact with an alkaline sorbent for a period of time sufficient to react said al... | 05/08/2012 |
| 7438879 | Purification device for flue gas with divided scrubbing liquid sump A device provides the purification of flue gas comprising a scrubbing liquid sump divided into several basins and a pump device, which pumps the scrubbing liquid from at least one basin of the scrubbing liquid sump to scrubbing liquid nozzles. ... | 10/21/2008 |
| 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 |
| 7419646 | Method of deacidizing a gas with a fractional regeneration absorbent solution The gaseous effluent flowing in through line 1 is contacted in absorption zone ZA with the liquid absorbent solution flowing in through line 9. The gaseous effluent depleted in acid compounds is discharged through line 2. The absorbent solution ... | 09/02/2008 |
| 7371357 | Process for removal of pollutants A process for the removal of pollutants from a combustion process and, more particularly, a process for removing pollutants such as carbon dioxide, mercury, sulphur dioxide, nitrogen compounds and oxygen compounds from a combustion process. The process includes the ... | 05/13/2008 |
| 7351387 | Method for removing impurities accumulated in a scrubbing fluid A method for removing impurities accumulated in a scrubbing fluid in a flue gas scrubber and effluents from the scrubber. The flue gases are scrubbed with a scrubbing fluid that includes a calcium-containing absorbent. The scrubbing fluid containing gypsum and other... | 04/01/2008 |
| 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 |
| 7326333 | Apparatus and process for extracting sulfur compounds from a hydrocarbon stream Described is an apparatus and process for extracting sulfur compounds from a hydrocarbon stream. A prewash section for converting hydrogen sulfide to sodium sulfide by reaction with an alkali such as caustic communicates with an extractor section disposed directly a... | 02/05/2008 |
| 7326286 | Exhaust gas treating tower Provided is an exhaust gas treating tower in which exhaust gas flow velocity is increased more than a prior art case so that exhaust gas treating efficiency can be enhanced or the exhaust gas treating tower can be made compact if equivalent performance is to be main... | 02/05/2008 |
| 7326284 | Contamination control system and air-conditioning system of a substrate processing apparatus using the same An air-conditioning system of a substrate processing apparatus includes an air inlet line for providing air to a clean room. A contamination control apparatus for removing contaminants in the air is connected to the air inlet line. A controller controls temperature ... | 02/05/2008 |
| 7306776 | Method and an apparatus for processing flue gas scrubber material flows A method for processing flue gas scrubber material flows. The flue gas is scrubbed with a calcium-based absorbent containing washing fluid for absorbing sulphur oxides from the flue gases, and the formed gypsum slurry is directed from the flue gas scrubber to the se... | 12/11/2007 |
| 7294322 | Collection scoop for flue gas desulfurization systems with bleed streams or ex situ forced oxidation A scoop is used to collect a liquid slurry upstream of an internal collection tank. The scoop is in fluid communication with a downcomer, which receives at least part of the collected slurry, thereby maintaining a continuous flow of liquid slurry through the scoop t... | 11/13/2007 |
| 7288235 | Method and installation for purifying gas The invention relates to a method and an installation for separating sulphur dioxide from exhaust gas, wherein sea water is added to the exhaust gas in an absorption column and the sea water charged with sulphur compounds is extracted from the liquid sump of the abs... | 10/30/2007 |
| 7282087 | Wetted particle and droplet impingement surface An inert impingement surface that is pliable and which, when set in motion, works to shed itself of particle deposits. The pliable surface may be formed of a plurality of coactive members that co-operate with one another to clean-off the particle deposits from each ... | 10/16/2007 |
| 7273579 | Process for production of gypsum/fiber board An improved process calcining a gypsum/cellulosic fiber slurry to produce a composite gypsum/cellulosic fiber product resides in adding a selected crystal modifier to the gypsum/cellulosic fiber slurry prior to the heating step to reduce the time necessary to carry ... | 09/25/2007 |
| 7252703 | Direct contact liquid air contaminant control system The direct contact liquid air contaminant control system and method to revitalize air by removal of carbon dioxide and other trace gas contaminants use a direct contact air, liquid scrubber element and stripper element. The scrubber element has two rotor elements ro... | 08/07/2007 |
| 7250483 | Inhibition of catalytically active impurities in polycarbonate by the melt transesterification process An improvement to the melt transesterification process for the preparation of polycarbonate is disclosed. The improvement entails adding to the process between its medium viscosity reactor and a high viscosity reactor at least one bridged ester of organic sulphur-co... | 07/31/2007 |
| 7247284 | Method and apparatus for regeneration of flue gas scrubber caustic solutions A process to regenerate wet flue gas scrubber purge liquid into NaOH caustic suitable for make-up caustic for the scrubber is disclosed. Further, sulfur is removed from waste effluent in the form of gypsum with the process described herein. Lime is added to the spen... | 07/24/2007 |
| 7238223 | Acoustical stimulation of vapor diffusion system and method An apparatus for removing constituents from a fluid stream is provided. The apparatus includes a duct, a collection device, a sorbent injector, and an acoustic generator. The duct has a fluid passageway to receive a fluid stream having constituents. The collection d... | 07/03/2007 |
| 7179438 | Methods and apparatus for recovering gypsum and magnesium hydroxide The present invention provides methods and apparatus for treating flue gas containing sulfur dioxide using a scrubber, and more particularly relates to recovering gypsum and magnesium hydroxide products from the scrubber blowdown. The gypsum and magnesium hydroxide ... | 02/20/2007 |
| 7153481 | Method and device for separating sulphur dioxide from a gas A device (1) for separating sulphur dioxide from a gas (4) by means of an absorption liquid has an inlet (2) for gas (4) containing sulphur dioxide, an outlet (18) for gas (16), from which sulphur dioxide has been separated,... | 12/26/2006 |
| 7113835 | Control of rolling or moving average values of air pollution control emissions to a desired value A controller directs performance of a process having multiple process parameters (MPPs), including a controllable process parameter (CTPP), a targeted process parameter (TPP), a defined target value (DTV) representing a limit on an actual average value (AAV) of the ... | 09/26/2006 |
| 7094382 | Method and a device for the separation of sulphur dioxide from a gas A device (1) for separating sulphur dioxide from a gas has an inlet (2) for the gas (4) and an outlet (42) for gas (40), from which sulphur dioxide has been separated. An apertured plate (20) is arranged between the inlet ( | 08/22/2006 |
| 7087162 | Accessible well for brine tank A well (12) outside of a brine tank (10) is provided which provides better accessibility to the brine refill valve (112) or other components within the well. Also, apertures (42–48) of differing elevations above the bottom of the brine ... | 08/08/2006 |
| 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 |
| 7052662 | NOx, Hg, and SOremoval using alkali hydroxide A process and apparatus for removing SO2, NO, and NO2 from a gas stream having the steps of oxidizing a portion of the NO in the flue gas stream to NO2, scrubbing the SO2, NO, and NO2 with an alkali scrubbing so... | 05/30/2006 |
| 7048899 | Removing NOx, SO, and Hg from a gas stream using limestone regeneration A process and apparatus for removing SO2, NO, and NO2 from a gas stream having the steps of oxidizing a portion of the NO in the flue gas stream to NO2, scrubbing the SO2, NO, and NO2 with an ammonia, ammonium h... | 05/23/2006 |
| 7037434 | Integrated water treatment and flue gas desulfurization process A water stream containing hardness minerals is subjected to a water treatment process using an alkali agent to precipitate the hardness minerals and to produce a softened water stream is used to create an integrated water treatment and flue gas desulfurization proce... | 05/02/2006 |
| 7025336 | Apparatus for removing particulates from a gas stream Particulates are removed from a gas stream by contact with a liquid. The gas stream is conveyed through an inlet channel, towards a liquid reservoir which is located below a perforated sheet. Gas flowing through holes in the sheet creates a pressure drop between the... | 04/11/2006 |
| 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 |
| 7005058 | Process and apparatus for removing sulfur from hydrocarbons Disclosed is an apparatus and process for controlling the sulfur content of effluent from a hydrocarbon fractionation column. The effluent includes a low boiling stream, a middle boiling stream and a high boiling stream. Either of the feed or the low boiling stream ... | 02/28/2006 |
| 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 |
| 6960332 | Process for purifying aqueous buffer solutions The present invention describes a procedure for the removal of sodium sulphate from a phosphate solution that has been used for absorption of SO2 from flue gases, in which a precipitate forms when the absorption solution is regenerated by evaporation. In ... | 11/01/2005 |
| 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 |
| 6939523 | Method of removing SO3 from flue gases A calcium hydroxide slurry is injected into the off gases in the exhaust duct of an industrial plant which burns sulfur containing fuels. The calcium hydroxide slurry reacts with SO3 produced as a result of the combustion process and forms a primary solid... | 09/06/2005 |
| 6913737 | Method for the treating in exhaust gas and exhaust gas treating system The present invention provides a method for the treatment of mercury present in exhaust gas wherein, after a chlorinating agent is added to exhaust gas containing nitrogen oxides, sulfur oxides and mercury, the exhaust gas is subjected to a reductive denitration tre... | 07/05/2005 |
| 6881389 | Removal of H2S and CO2 from a hydrocarbon fluid stream A system for removal of Hydrogen Sulfide (H2S) and/or Carbon Dioxide (CO2) from natural gas via absorption and disassociation utilizing a sea water contact system. In the preferred embodiment of the present invention, a series of counter curren... | 04/19/2005 |
| 6863875 | Flue gas treating system and process In a flue gas treating system, an absorption tower (21), a reheating section (22) and a fan (23) are arranged in line on a vertical axis so as to function as at least a part of a stack for emitting the treated flue gas into the atmosphere. Moreo... | 03/08/2005 |
| 6841138 | Method and device for temperature reduction of exhaust gas by making use of thermal water A system for reducing the temperature of exhaust gas in an incinerator or boiler equipment having an exceedingly small size and avoiding any difficulties caused by damage to the wall surface of a gas cooling chamber due to adherence of sprayed water droplets and dep... | 01/11/2005 |
| 6803025 | Process for removing SO3/H2SO4 from flue gases A process of using sodium carbonate and sodium bicarbonate solutions to remove SO3 and other acidic gases or vapors from a flue gas without substantially decreasing the amount of sulfur dioxide also present in the flue gas. Very limited quantities of such... | 10/12/2004 |
