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| Number | Title | Issue Date |
| 7780761 | Adsorptive gas sampler using ionic nano-droplets A gas sampling canister has an electrospray nozzle for creating an ionic fluid electrospray plume. A gas sample intake is positioned to provide a gas sample flowing through the ionic fluid electrospray plume. A cooled counter electrode is positioned to collect the e... | 08/24/2010 |
| 7318857 | Dual flow wet electrostatic precipitator An apparatus for removing particulate matter from a gas stream containing particular matter, the apparatus comprising: a mist-producing element that mixes a gas stream entering the apparatus with liquid droplets; a down-flow Wet Electrostatic Precipitator (WESP) sec... | 01/15/2008 |
| 7288140 | Wet process gas treatment apparatus In a wet-process gas treatment method of treating an acid gas by using at least two treating columns connected in series, a ratio of the concentration of an acid gas at an outlet to a concentration of the acid gas at an inlet of a first treating column is set higher... | 10/30/2007 |
| 7273516 | Plate heat exchanger A plate heat exchanger for exchanging heat between a first air stream and a second air stream includes a plurality of plates limiting first and second exchange chambers which are serially arranged in a transversal direction with respect to the plates. A first air st... | 09/25/2007 |
| 7267708 | Rigid electrode ionization for packed bed scrubbers An ionizing particulate scrubber is provided for the removal of particulate from a gaseous exhaust stream, said scrubber including two sections: a charging section and a collection section. The charging or ionizing section includes one or more cylindrical tubular gr... | 09/11/2007 |
| 7160358 | Pollution control in wood products dryer Contaminant laden gas streams from wood product dryer operations, and other sources, are purified. The gas stream first is saturated with moisture by contacting the gas stream with fine liquid droplets which entrain particulates. The gas stream then is subjected to ... | 01/09/2007 |
| 7156898 | Low pressure drop deep electrically enhanced filter A method and apparatus using deep pleated filters to provide efficient and safe electrically enhanced filtering (EEF), with ultra low pressure drop, higher efficiency of particulate removal and higher dirt holding capacity over the life of the filter. An EEF may be ... | 01/02/2007 |
| 7147692 | Air cleaning apparatus and method for cleaning air The method involves contacting the air with an aqueous or non-aqueous liquid in a stand-alone system. The air may be brought into contact with the liquid using a number of different types of apparatus, including a packed column scrubber. The liquid may be non-evapor... | 12/12/2006 |
| 7077884 | Hydrogen sulfide scrubber using polymeric amine and associated methods A hydrogen sulfide scrubber includes first and second scrubber tanks with scrubber media contained therein. Scrubbing solution circulators each include a dispenser for dispensing scrubbing solution into contact with the scrubber media, a sump for collecting the scru... | 07/18/2006 |
| 6974494 | Apparatus and method using an electrified filter bed for removal of pollutants from a flue gas stream Pollutants in a flue gas stream from a dryer of products, such as wood chips, are removed by a pollution abatement system that includes an electrified filter bed unit for removing solid particulates. To prevent deteriorated operation of the electrified filter bed un... | 12/13/2005 |
| 6953495 | Low-energy venturi pre-scrubber for an air pollution control system and method A low-energy venturi pre-scrubber optimized for removing abrasive particles from a gaseous effluent is disclosed. While venturi scrubbers are efficiently used for at removing entrained particulates in air pollution control systems, they can be damaged due to the abr... | 10/11/2005 |
| 6918951 | Disc-type air filters An air filter includes a stack of filter discs formed with contacting faces having surface formations defining filtering passageways between adjacent discs for removing solid particles from the air passing through the stack. The filter discs in the stack further inc... | 07/19/2005 |
| 6858064 | Apparatus for the electrostatic cleaning of gases and method for the operation thereof In an apparatus for the purification of a gas which apparatus includes a three section conduit with an ionization and cleaning section in which particles contained in water-saturated air are ionized and then conducted through a cha... | 02/22/2005 |
| 6551382 | Hot-humid/cold gas scrubbing process and apparatus Effluent gas cleaning process and apparatus for effectively removing particulates in the 0.01 micron to 0.1 micron diameter range, and for removing water-soluble gaseous contaminants, by first bringing the effluent to a relatively high temperature and hum... | 04/22/2003 |
| 6508861 | Integrated single-pass dual-field electrostatic precipitator and method An improvement in an electrostatic precipitator and method for removing particulate contaminants entrained in a gas stream passed through an electrode arrangement in which particulates are charged in a first electrostatic field and subjected to a second e... | 01/21/2003 |
| 6110256 | Apparatus and method for removing particulates and corrosive gases from a gas stream Apparatus and method for removing particulates and corrosive gases from a gas stream includes the serial use of a condensing wet electrostatic precipitator section for removing smaller particulates, in the submicron range, in conjunction with a vertically... | 08/29/2000 |
| 6074458 | Method and apparatus for separation of unburned carbon from flyash Apparatus and method for separating carbon particles from flyash includes one of increasing a relative humidity of the flyash or decreasing the relative humidity of the flyash to within an optimum humidity range, and introducing the flyash within the opti... | 06/13/2000 |
| 5827352 | Method for removing mercury from a gas stream and apparatus for same A method for removing mercury from a gas stream. In the method, sorbent is injected into the gas stream. Water is dispersed into the gas stream to create a cooled gas stream. The cooled gas stream is allowed to dwell with the sorbent in a chamber to remov... | 10/27/1998 |
| 5792238 | Fine-particulate and aerosol removal technique in a condensing heat exchanger using an electrostatic system enhancement An integrated flue gas treatment condensing heat exchanger having a particle charger located upstream of the second stage heat exchanger of the system for improved cleaning of flue gas and increased removal of fine particulate matter.... | 08/11/1998 |
| 5753012 | Method for the cleaning of flue gases with different contents of acidic components A method of operating an apparatus for the cleaning of industrial waste gases and especially power plant flue gases. The gases are fed through a quencher to a first scrubber with its own recirculation and upstream of a second scrubber having its own recir... | 05/19/1998 |
| 5427608 | Method of separating solid and/or liquid particles and/or polluting gas from a gas stream, and apparatus for carrying out the method A method and apparatus for separating solid and/or liquid particles and/or polluting gas from a gas stream includes two component nozzles by which a washing liquid is finely distributed in a gaseous phase and introduced in the gas stream within a gas wash... | 06/27/1995 |
| 5364457 | Electrostatic gas cleaning apparatus In the purification of gases generated in metallurgical and similar furnace operations, the impurities include solid particles and compounds or elements which are gaseous at the furnace temperatures and only form solid or liquid at temperatures approachin... | 11/15/1994 |
| 5282885 | Electrostatic gas cleaning process and apparatus In the purification of gases generated in metallurgical and similar furnace operations, the impurities include solid particles and compounds or elements which are gaseous at the furnace temperatures and only form solid or liquid at temperatures approachin... | 02/01/1994 |
| 5061299 | Air/gas/micro partical pollution control system Contaminated hot gases are first cooled and then the flow is divided between a plurality of identical modules for removal or contaminants. There are two stages of treatment in each module, starting with submergence of the flow under the surface of an agit... | 10/29/1991 |
| 5041144 | Process of purifying raw fuel gas produced by a gasification of solid fuels The raw gas produced by gasification is cooled to temperatures from 150° to 400° C. and has an NH3 content of at least 0.1% by volume as it is fed to a spray drying zone. Recycle water is fed to and is entirely evaporated in the spray drying ... | 08/20/1991 |
| 5000762 | Method for separating dioxins from gases The invention relates to a method for extracting dioxins and like highly toxic, organic contaminants from a gas. The invention is characterized by contacting the gas with a liquid aerosol over a pre-determined period of time, and by electrically charging ... | 03/19/1991 |
| 4964885 | Method of cleaning exhaust gas of drying plants and an apparatus for implementing such method The dew point of the exhaust gas is firstly reduced to a value in the range of 60°-65° C. Thereafter the exhaust gas flows through a washing and condensing apparatus. A part of the prepurified condensate is recirculated in a loop for carrying out the la... | 10/23/1990 |
| 4957512 | Method of cleaning gas from solid and gaseous matter and apparatus materializing same A method of cleaning gas from solid and gaseous matter is accomplished by a two-stage scrubbing of a gas flow with a liquid. For the first-stage scrubbing, the gas is admitted at a velocity of 30-40 m/s and is cooled in the course of scrubbing to the temp... | 09/18/1990 |
| 4888158 | Droplet impingement device An apparatus and method for separating unevaporated droplets from a hot gas stream such as a flue gas. The apparatus referred to as a droplet impingement device is designed to enable a modified electrostatic precipitator to efficiently remove sulfur dioxi... | 12/19/1989 |
| 4569682 | Process for removing solids from a gas containing the same An electrically resistive flocculating agent is added to electrically conductive solid fines recovered from an electrofiltration zone. The dry flocculated solid fines including the flocculating agent are recycled to the electrofiltration zone in which a g... | 02/11/1986 |
| 4530822 | Gas/liquid contact processes In a process involving contacting a gas with a liquid whereby to cool and/or clean the gas, the liquid is sprayed into the gas by a rotary-cup atomizer or other "air-assisted" atomizer in which the spray is produced by impacting a film of the liquid with ... | 07/23/1985 |
| 4473380 | Pollution control system A pollution control system is disclosed wherein condensable pollutants are removed from a high-temperature gas stream by counterflow contact in a vertical tower with downwardly flowing, relatively cool absorbent oil. The absorbent is at a sufficiently low... | 09/25/1984 |
| 4364910 | Integrated flue gas processing method A system and process for flue gas processing to remove both gaseous contaminants such as sulfur dioxide and particulate matter such as flyash integrates spray scrubbing apparatus and wet electrostatic precipitation apparatus and provides for the advantage... | 12/21/1982 |
| 4305909 | Integrated flue gas processing system A system for processing hot flue gas to remove both gaseous contaminants such as sulfur dioxide and particulate matter such as flyash integrates spray scrubbing apparatus and wet electrostatic precipitation apparatus and provides for the advantageous extr... | 12/15/1981 |
| 4261720 | Method and system for purifying fiber-resin emissions A method and apparatus for purifying waste product emissions from the manufacture of glass fiber products, including a system in which an electrostatic precipitation may or may not be employed, and in which separate, and easily controlled, forming air and... | 04/14/1981 |
| 4201753 | Flue gas desulfurization process A method of desulfurizing carbonaceous fuel, such as coal and oil containing sulfur. The fuel is ignited in a boiler combustion zone and a saturated solution of potassium carbonate and potassium hydroxide is sprayed into the flue gas stream immediately do... | 05/06/1980 |
| 4194889 | Method of and apparatus for processing sulfur-containing exhaust gas The sulfur-containing roasting gases of an ore-roasting plant are cooled in a waste-heat boiler, which produces steam, and then are subjected to particle removal in an electrostatic precipitator or cyclone. The gases are then scrubbed with recirculated aq... | 03/25/1980 |
| 4184886 | Method of conditioning hot gases for filtration Hot dust laden gases from heated kilns in cement plants are mixed with a cooler moistening medium to provide a mixture having a dew point lying within a temperature range in which dust separation in electrofilters is greatly enhanced. Volatile alkali comp... | 01/22/1980 |
| 4093426 | Method of and apparatus for the liquid contact of dust from a hot-gas stream and drying sludge A hot-gas stream containing suspended solids (e.g., dust), generally from a cement-clinker kiln, is cooled and treated with a liquid (generally water) in a cooling tower after which the gas stream is subjected to electrostatic precipitation to remove entr... | 06/06/1978 |
| 4039304 | Method of removing SO2 and/or other acid components from waste gases Waste gas is contacted with a solution of a salt from a pollutant of the gas. This solution is obtained from another stage of the process used for cleansing or purifying the gas. The resulting mixture of gas and solution is subjected to vaporization so as... | 08/02/1977 |
