| Entries |
| Document | Title | Date |
|---|
| 20080267847 | PROCESS AND SYSTEM FOR REMOVING HYDROGEN SULFIDE AND MERCAPTANS IN AMMONIA-BASED DESULFURIZATION SYSTEMS - A flue gas desulfurization process and system that utilize ammonia as a reactant, and in which any hydrogen sulfide and/or mercaptans within the ammonia are separated during the desulfurization process so as to prevent their release into the atmosphere. The process and system entail absorbing acidic gases from a flue gas with a scrubbing media containing ammonium sulfate to produce a stream of scrubbed flue gas, collecting the scrubbing media containing the absorbed acidic gases, injecting into the collected scrubbing media a source of ammonia that is laden with hydrogen sulfide and/or mercaptans so that the injected ammonia is absorbed into and reacted with the collected scrubbing media, stripping the hydrogen sulfide and/or mercaptans from the collected scrubbing media by causing the hydrogen sulfide and/or mercaptans to exit the collected scrubbing media as stripped gases, and collecting the stripped gases without allowing the stripped gases to enter the stream of scrubbed flue gas. | 10-30-2008 |
| 20090004085 | Method and System for Removing Mercury from Flue Gas - A biomass feeding unit feeds biomass to a boiler. A hydrogen-chlorine monitoring unit measures hydrogen-chloride content in flue gas fed to a desulfurization equipment. A mercury monitoring unit measures mercury content in treated flue gas emitted from the desulfurization equipment. A feed-amount instruction unit instructs proper feed amount of the biomass to the biomass feeding unit based on measurement values obtained by the hydrogen-chlorine monitoring unit and the mercury monitoring unit. | 01-01-2009 |
| 20090047200 | MULTIFUNCTIONAL ABATEMENT OF AIR POLLUTANTS IN FLUE GAS - An apparatus and a method that uses generated alkaline, alkaline-earth, and/or silica/alumina aerosols as a multifunctional additive to scavenge sulfur oxides in flue gas, minimize poisoning effects of sulfur oxides on mercury sorbent performance, and enhance particulate matter capture in electrostatic precipitators and other particulate filter devices by conditioning the fly ash. | 02-19-2009 |
| 20090117019 | REDUCING MERCURY EMISSIONS FROM THE BURNING OF COAL - Processes and compositions are provided for decreasing emissions of mercury upon combustion of fuels such as coal. Various sorbent compositions are provided that contain components that reduce the level of mercury and/or sulfur emitted into the atmosphere upon burning of coal. In various embodiments, the sorbent compositions are added directly to the fuel before combustion; are added partially to the fuel before combustion and partially into the flue gas post combustion zone; or are added completely into the flue gas post combustion zone. In preferred embodiments, the sorbent compositions comprise a source of halogen and preferably a source of calcium. Among the halogens, iodine and bromine are preferred. In various embodiments, inorganic bromides make up a part of the sorbent compositions. | 05-07-2009 |
| 20090130013 | METHODS AND SYSTEMS FOR ENHANCING MERCURY, SELENIUM AND HEAVY METAL REMOVAL FROM FLUE GAS - A method for treating flue gas may include adding iron to a slurry in a ratio between approximately 20-to-1 and 5000-to-1 by weight of iron to a weight of mercury, selenium or other heavy metal to be removed from the flue gas, and contacting the slurry with the flue gas in a flue gas desulfurization system. A system for treating flue gas may include a scrubber, a slurry tank, and a water source. Water and limestone may be combined in the slurry tank to form a limestone slurry. At least a portion of the limestone slurry may be used to treat flue gas in the scrubber. Iron may be added to at least a portion of the limestone slurry used to treat flue gas in the scrubber. The iron used in either the method or system may be a ferrous or ferric salt, or elemental iron. | 05-21-2009 |
| 20090220402 | NOVEL SULFUR RECOVERY PLANT - Novel sulfur recovery plants, and processes utilizing these plants are disclosed. These apparatuses eliminate the use of a condenser between the waste heat boiler and first Claus catalytic reactors, and also eliminate the use of reheaters in between Claus catalytic reactors. | 09-03-2009 |
| 20090263305 | WET FLUE-GAS DESULFURIZATION APPARATUS AND METHOD OF WET FLUE-GAS DESULFURIZATION - Exhaust (Flue) gas of boiler is introduced through gas inlet part (port) ( | 10-22-2009 |
| 20100068111 | Joining the mixing and variable gas atomizing of reactive chemicals in flue gas cleaning systems for removal of sulfur oxides, nitrogen oxides and mercury - Diverse methods of utilization and the corresponding, related modifications, of linear type, Variable Gas Atomization (VGA) nozzles and lances are described. Therein is joined the mixing and gas atomization of chemicals that react to form active products that further react with harmful flue gas constituents of combustion so as to enable their effective collection. One version combines, in a lance assembly of nozzles, the injection of reactants, in the form of finely divided dry solids conveyed in a carrier air stream, and the fine atomization of water, aqueous solutions or slurries. Atomization of such streams is employed to effectively wet the surfaces of the dry particles and, thereby, promote the rapid sorption of gaseous constituents of flue gas being treated. Another version simultaneously mixes and atomizes reacting chemicals to produce, and release into the flue gas stream, strongly oxidizing, transient, species of their reaction products. The simultaneous atomization and chemical reaction enables the effective capture of targeted flue gas constituents. An accompanying flue gas duct modification is described providing means for cost effective, high-performance system operation of linear VGA nozzle-lance arrays, as components of the various subject flue gas cleaning processes. The combination of linear VGA nozzle-lances and, as needed, flue gas duct enhancement, is intended to provide an economical and technically practicable means of retrofitting existing fossil fueled boilers of a wide range of capacities to meet future emission limits for SO | 03-18-2010 |
| 20100284878 | AIR POLLUTION CONTROL SYSTEM AND METHOD FOR COAL COMBUSTION BOILER - An air pollution control system for a coal combustion boiler according to the present invention includes: a NOx removing apparatus ( | 11-11-2010 |
| 20100290967 | Process for producing sodium bicarbonate for flue gas desulphurization - Process for producing sodium bicarbonate for purifying flue gases, according to which an aqueous solution containing sodium sulfate is subjected to electrodialysis to produce a sodium hydroxide solution and a sodium bisulfate solution, the sodium hydroxide solution being carbonated in order to obtain sodium bicarbonate. | 11-18-2010 |
| 20100303700 | PROCESS FOR TREATING A GAS STREAM OR EFFLUENT - One exemplary embodiment can be a process for treating a tail gas stream from a sulfur recovery zone. Generally, the process includes passing the tail gas stream through, in sequence, a hydrogenation zone, a quench zone, and an acid gas removal zone using a solvent. The solvent can include at least one of a dimethyl ether of polyethylene glycol, a N-methyl pyrrolidone, a N-formyl morpholine, a N-acetyl morpholine, a tetrahydro-1,4-oxazine, and a mixture comprising diisopropanolamine and tetrahydrothiophene-1,1-dioxide. | 12-02-2010 |
| 20110014104 | REDOX METHOD FOR CAPTURE OF TOTAL GASEOUS MERCURY BY WET FGD - A method for capturing gaseous elemental mercury in a flue gas wherein a soluble mercury oxidizer is utilized to oxidize gaseous elemental mercury at a gas-liquid interface of a wet scrubber, and oxidized mercury product is removed prior to re-emission. | 01-20-2011 |
| 20110076216 | Carbon Dioxide Capture Power Generation System - The present invention discloses a carbon dioxide capture power generation system provided with a boiler to combust a fuel in the oxygen atmosphere, a carbon dioxide capture equipment to remove carbon dioxide in the wake flow of the boiler, a piping branching from the wake flow of the boiler to recycle the combustion exhaust gas to the boiler, and a desulfurization equipment to remove sulfur oxides and a sulfuric acid removal equipment to remove a sulfuric acid gas in the upstream of carbon dioxide capture equipment and in the wake flow of the boiler. | 03-31-2011 |
| 20110135554 | SYSTEMS AND METHODS FOR REMOVING GASEOUS POLLUTANTS FROM A GAS STREAM - Horizontal gas-liquid scrubbing systems and associated gas scrubbing methodologies are provided. In one embodiment, a horizontal duct scrubbing system includes a horizontally disposed housing having a waste gas inlet and a treated gas outlet, a liquid inlet manifold disposed within the horizontally disposed housing, the liquid inlet manifold comprising a plurality of nozzles oriented to spray a scrubbing liquor co-current to the flow of a gas stream flowing through the horizontally disposed housing, and a demister located proximal the treated gas outlet, where the horizontally disposed housing is substantially free of flow deflection members between the liquid inlet manifold and the demister. | 06-09-2011 |
| 20110195008 | DESULFURIZATION PROCESS - The invention relates to a desulfurization process, wherein a gas mixture is subjected to a separation process to separate the acidic components of the gas, an acid gas containing carbon dioxide and sulfur compounds, in particular hydrogen sulfide, being formed in this process, the acid gas being sent to a Claus plant for separation of elemental sulfur, and the residual gas leaving the Claus plant being subjected to a further separation, in which the water formed in the Claus process is at least partially removed, only technically pure oxygen being supplied as the oxygen-containing reaction gas to the Claus plant, and carbon dioxide in a purity which allows direct sequestration or industrial utilization being removed downstream from the Claus plant. | 08-11-2011 |
| 20120003133 | Air Pollution Solution to the Problem of Opacity in Coal Fired Power Plant Stack Emissions - A method of controlling air pollution arising from sulphur trioxide and or sulphuric acid in coal combustion gases, combustion gases passing through the demister region of a wet flue gas desulphurisation unit are exposed to a sulphide based reducing agent such as hydrogen sulphide, such that metal catalysts promoting the oxidation of ammonia leading to the formation of nitrosylsulfuric acid are poisoned and so prevented from catalysing the formation and discharge of sulphuric acid in aerosol emissions in stack gases. | 01-05-2012 |
| 20120034145 | TREATMENT METHOD AND TREATMENT FACILITIES OF EXHAUST GAS - An object of the present invention is to provide a treatment method and a plant of an exhaust gas in which corrosion resistance of the exhaust gas treatment plant to a sulfuric acid mist after wet type desulfurization is increased. The treatment method of an exhaust gas in the present invention, wherein sulfur oxide is removed by wet type desulfurization of the exhaust gas and a sulfuric acid mist is removed by feeding ammonia into the exhaust gas, is characterized in that an ammonia gas is mixed into the exhaust gas by feeding inorganic ammonium salt to an alkali desulfurizing agent when the desulfurizing agent is sprayed into the exhaust gas to absorb and remove the sulfur oxide in the exhaust gas. | 02-09-2012 |
| 20120058035 | System and Method for Flue Gas Conditioning - A method and system for enhancing the efficiency of an electrostatic precipitator in a flue gas stream that withdraws a selected amount of combustion gas from a main flue gas stream at a location downstream of the electrostatic precipitator; typically heats the selected amount of combustion gas to a predetermined temperature; passes the selected amount of combustion gas through a catalyst to convert sulfur dioxide to sulfur trioxide producing a mixture of flue gas enriched with sulfur trioxide; and returns the mixture of the flue gas enriched with the sulfur trioxide back into the main flue gas stream at a point upstream of the electrostatic precipitator. Optionally a filter removes most of the remaining particulate matter from the selected amount of combustion gas entering the catalyst bed. A portion of this selected amount can be made to bypass the catalyst for precise control of the amount of sulfur trioxide being produced. A controller can control fans, heaters and dampers as well as make computations as the required amount of sulfur trioxide needed. | 03-08-2012 |
| 20120121492 | SYSTEM AND METHOD FOR TREATING GAS FROM A BIOMASS GASIFICATION - A process and a system treat a synthesis gas originating from a biomass gasification, which contains the following steps: a) performing a first quenching of the synthesis gas at a first temperature and a first pressure; b) performing a second quenching of the quenched synthesis gas at a second temperature and a second pressure, wherein the second temperature is lower than the first temperature; c) scrubbing the twice-quenched synthesis gas in an oil scrubber at a scrubbing temperature which is in the range of the second temperature; d) purifying the quenched and scrubbed synthesis gas in a catalyst-doped adsorption stage; and e) feeding the thus-purified synthesis gas into a refining process. The thus-described multistage prepurification by quenching and also an absorption/desorption stage and if appropriate reactive adsorption and also if appropriate HDS catalysis and/or chemisorption fulfils this object in an excellent manner. | 05-17-2012 |
| 20130058854 | PROCESS AND APPARATUS FOR SULPHURIC ACID PRODUCTION - A process for the conversion of sulphur dioxide contained in a feed gas to sulphur trioxide, comprising the steps of a) alternatingly providing a first feed gas containing a high concentration of sulphur dioxide and a second feed gas containing a low concentration of sulphur dioxide as a process gas, b) preheating the process gas by heat exchange with a heat exchange medium, c) reacting the process gas in the presence of a catalytically active material in a catalytic reaction zone, d) converting at least in part the sulphur dioxide of the process gas into sulphur trioxide contained in a product gas in the catalytic reaction zone, e) cooling the product gas by contact with a heat exchange medium, wherein a thermal buffer zone is provided in relation to one of said process steps, providing thermal energy produced during super-autothermal operation for heating the process gas during sub-autothermal operation. | 03-07-2013 |
| 20130259788 | CONDENSER AND METHOD FOR CLEANING FLUE GASES - An apparatus and method to clean flue gases. As shown in FIG. | 10-03-2013 |
| 20130280155 | Sterically Hindered Amines and Associated Methods - Amine compositions comprising sterically hindered amines and associated methods are provided. In some embodiments, amine compositions of the present disclosure may be useful for selective removal of H | 10-24-2013 |
| 20130309157 | CONTROL OF WET SCRUBBER OXIDATION INHIBITOR AND BYPRODUCT RECOVERY - The present disclose is directed to a method for controlling iodine levels in wet scrubbers, and, in particular, recirculating wet scrubbers. | 11-21-2013 |
| 20130343978 | SOUR GAS AND ACID NATURAL GAS SEPARATION MEMBRANE PROCESS BY PRE REMOVAL OF DISSOLVED ELEMENTAL SULFUR FOR PLUGGING PREVENTION - Methods for removing sulfur from a gas stream prior to sending the gas stream to a gas separation membrane system are provided. Two schemes are available. When the sulfur content is high or flow is relatively high, a scheme including two columns where one tower is regenerated if the sulfur concentration exceeds a preset value can be used. When the sulfur content is low or flow is relatively low, a scheme including one column and an absorption bed. | 12-26-2013 |
| 20140050645 | WET SCRUBBER FOR REMOVING SULFUR DIOXIDE FROM A PROCESS GAS - A wet scrubber ( | 02-20-2014 |
| 20140140914 | COST CONTROL FOR CO2 CAPTURE - A flue gas treatment process and system is presented. The system includes a fan capable of moving a flue gas through a flue gas desulfurizer, direct contact cooler, and CO | 05-22-2014 |
| 20140199224 | METHOD FOR MONITORING A CLEANING OF A PROCESS GAS - The present disclosure is directed to a method for monitoring a cleaning of a process gas passing through a wet scrubber. The wet scrubber comprises an inlet zone, a contact zone and an outlet zone. The contact zone is divided into at least two sections. The method comprises measuring a concentration of sulphur dioxide in at least a first measuring point corresponding to a first section of the at least two sections of the contact zone to obtain measurement information; and comparing the measurement information to a reference value to determine a local sulphur dioxide removal performance of the first section. | 07-17-2014 |
| 20140308191 | SYSTEMS AND METHODS FOR POST COMBUSTION MERCURY CONTROL USING SORBENT INJECTION AND WET SCRUBBING - A system for cleaning flue gas includes a particulate removal system; a powdered sorbent injector, for injecting powdered sorbents, positioned downstream from the particulate removal system; and a flue gas desulfurization system positioned downstream from the powdered sorbent injector. | 10-16-2014 |
| 20140322117 | METHOD FOR DETECTING LOSS OF DESULFURIZATION ORGANIC COMPONENTS AND REGENERABLE FLUE GAS DESULFURIZATION PROCESS - A method for detecting paths and amount of loss of desulfurization organic components in a flue gas desulfurization system includes preparing a to-be-measured solution and a base standard solution, and diluting the base standard solution with water to a plurality of standard solutions containing different concentrations of desulfurization organic components; adjusting the to-be-measured solution and standard solutions to have a strong acidity, respectively, such that each of desulfurization organic components in the to-be-measured solution and standard solutions exists in ion forms; heating and oscillating the to-be-measured solution and standard solutions, respectively; respectively detecting carbon elements in the standard solutions, to form a linear relationship between concentrations of the desulfurization organic components in the standard solutions and detected carbon element data; and detecting carbon elements in the to-be-measured solution, and obtaining a total concentration of the desulfurization organic components in the to-be-measured solution according to the linear relationship. | 10-30-2014 |
| 20150352489 | EFFECTIVE REMOVAL OF ACIDIC SULFIDE GAS USING AMMONIA-BASED DESULFURIZATION - A method for effectively removing acidic sulfide gas using ammonia-based desulfurization includes the following steps of: 1) pre-treatment, wherein sulfide in acid gas undergoes through pre-treatment methods of sulfur recovery, acid making or/and incineration to convert remaining sulfur in the acid gas into sulfur oxides, and the acid tail gas with sulfur oxides is obtained; and the acid gas is derived from petrochemical industry, natural gas chemical industry, coal chemical industry, etc.; 2) ammonia absorption of sulfur oxides, wherein the acid tail gas with sulfur oxides is allowed to flow into an ammonia absorption apparatus, and a cyclic absorption solution is used to absorb sulfur oxides; and 3) post-treatment of ammonium sulfate, wherein a saturated or nearly saturated absorption solution undergoes concentration, crystallization, solid-liquid separation, and drying to obtain a solid product of ammonium sulfate. Sulfur oxides (including sulfur dioxide, sulfur trioxide and hydrates thereof) in the acid tail gas are removed and sulfuric acid, sulfur and ammonium sulfate are byproduced, and the cleaned gas is discharged upon meeting the emission standard. | 12-10-2015 |
| 20150375166 | AIR POLLUTION CONTROL SYSTEM AND AIR POLLUTION CONTROL METHOD - Provided is an air pollution control system including: a denitration apparatus; an air heater; a precipitator; a desulfurization apparatus; a dehydrator; a spray drying apparatus provided with a spray unit that is configured to spray dehydrated filtrate supplied from the dehydrator; a flue gas introduction line through which a branch gas branched from the flue gas is introduced to the spray drying apparatus; a flue gas supply line through which a flue gas from the spray drying apparatus returns to a main flue gas duct; a solid content separator that performs a solid-gas separation on solid contents contained in the flue gas; and a kneader that performs kneading and immobilizing treatment on the separated solid contents together with an immobilization aid. | 12-31-2015 |
| 20190143265 | METHOD AND APPARATUS FOR REMOVING SULFUR OXIDES FROM GAS | 05-16-2019 |
