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| Number | Title | Issue Date |
| 7374604 | System and method for flue gas treatment The present invention discloses a system for flue gas treatment, wherein the provided system comprises a quench module, a first control module, a filter collecting module, a wet scribing module and a regeneration module. In this system, parts of the particles contai... | 05/20/2008 |
| 7329298 | Filter A filter for exhaust gases produced by an internal combustion engine, and a method of using such a mat on a vehicle. The filter is a mat of fibers enclosed within a metal gauze. Preferably, the mats are corrugated and spaced apart within a housing such that exhaust ... | 02/12/2008 |
| 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 |
| 7306654 | Method and apparatus for recovering water from atmospheric air A method of separating water from air is provided comprising the steps of (a) contacting air having water vapor with an hygroscopic liquid mixture to produce a water rich hygroscopic liquid mixture, (b) heating at least a portion of the water rich hygroscopic liquid... | 12/11/2007 |
| 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 |
| 7065962 | Exhaust gas purifying system An exhaust gas purifying system and a method for purifying exhaust gas of combustion engines. The system includes a hollow casing, a converter chamber disposed within the casing, spray nozzles for spraying a scrubbing liquid into the converter chamber for forming a ... | 06/27/2006 |
| 7037474 | Use of sulfide-containing liquors for removing mercury from flue gases A method and apparatus for reducing and removing mercury in industrial gases, such as a flue gas, produced by the combustion of fossil fuels, such as coal, adds sulfide ions to the flue gas as it passes through a scrubber. Ideally, the source of these sulfide ions m... | 05/02/2006 |
| 7025809 | Dual-type air purification system An air purification system for treating pollutants in a gas stream. The air purification system includes a housing with a plurality of nozzles, an acidic water supply device and an alkaline water supply device. The housing introduces the gas stream. The acidic water... | 04/11/2006 |
| 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 |
| 6946105 | Process and apparatus for the recovery of metal oxide particles A process for the recovery of metal oxides from a solution containing metallic salts by spray roasting of these solutions. The process is particularly suitable for spray roasting spent pickling acids. The process feeds the solution to a reactor for spray roasting of... | 09/20/2005 |
| 6923852 | Flue gas desulfurization system with a stepped tray A stepped, perforated tray is provided for increasing the available gas-slurry contact area in a flue gas desulfurization chamber. The tray redirects the horizontal flow upwardly through the tray for increased surface area and contact time with slurry for removing S... | 08/02/2005 |
| 6863716 | Trap-type air purification system An air purification system which is well-suited to removing particles from outside air as the air flows into a cleanroom used in the fabrication of semiconductor integrated circuits. A housing provides at least one spray nozzle for spraying fine mist water droplets.... | 03/08/2005 |
| 6827765 | Scrubber for reducing siliciferous byproducts A scrubber for removing particles from waste gas. The scrubber comprises a chamber and a water-injecting device. The chamber has an outlet, an inlet connected to a gas inlet pipe, and a plurality of sprayers connected to a water source to spray water into the chambe... | 12/07/2004 |
| 6821317 | Wet-process gas treatment method and 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... | 11/23/2004 |
| 6759018 | Method for point-of-use treatment of effluent gas streams A system for abating undesired component(s) from a gas stream containing same, such as halocompounds, acid gases, silanes, ammonia, etc., by scrubbing of the effluent gas stream with an aqueous scrubbing medium. Halocompounds, such as fluorine, fluorides, perfluoroc... | 07/06/2004 |
| 6726748 | Method of converting a downflow/upflow wet flue gas desulfurization (WFGD) system to an upflow single-loop WFGD system A method of reducing the pressure drop in a downflow/upflow wet flue gas desulfurization (WFGD) system and of improving overall sulfur dioxide collection efficiency by converting the downflow/upflow WFGD system to an upflow single-loop WFGD system. The method includ... | 04/27/2004 |
| 6719829 | Venturi and methods for particulate removal with counterflow sprays The present invention provides improved systems and methods for scrubbing gas with a venturi scrubber. A dual spray venturi scrubber, in which a scrubbing liquid is injected upstream and counter to the flow through the venturi, provides for improved scrubbing perfor... | 04/13/2004 |
| 6695018 | 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 ... | 02/24/2004 |
| 6645273 | Method for removing impurity contents in the air A method for removing impurity substances in air flowing in a flow passage includes filtering the air in a first filter for removing solid substances; cooling the air in a first cooler to not higher than its dew-point temperature; capturing gaseous substa... | 11/11/2003 |
| 6623546 | Method and installation for chemical purification of vapor in a dehydrator with mechanical vapor compression According to the invention, the vapor is taken from the condensation chamber of the dehydrator and, prior to being compressed and at a temperature substantially equal to 100° C., it is caused to pass in succession through a series of purifiers, and in ea... | 09/23/2003 |
| 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 |
| 6511529 | Method of reducing the number of pollutants in a gas flow and device for carrying out said method The object of the invention is to provide a method of treating wash water resulting from the scrubbing of process gases in smelting plants, according to which method the wash water is brought into intimate contact with the process gas and is circulated wh... | 01/28/2003 |
| 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 |
| 6458188 | Method and means for air filtration A method of filtering an air or gas stream utilizes a liquid, such as water, to saturate the gas stream. A sufficient quantity of water is presented to the gas stream to saturate the gas stream and knock particulate matter out of the gas stream. The gas s... | 10/01/2002 |
| 6325983 | Nox scrubbing system and method A treatment system for process exhaust streams containing NOx. The system includes a plurality of sequential scrubbing assemblies that collectively receive and contact a process exhaust stream containing NOx and a water stream to produce a product exhaust... | 12/04/2001 |
| 6312503 | System to quench gasses and remove condensables A method and apparatus for quenching and scrubbing a hot gas using a liquid in a single packed column while controlling mist formation. Hot gas is introduced at the bottom of the column and drawn upward countercurrent to the scrubbing liquid. The column h... | 11/06/2001 |
| 6197093 | Method and apparatus for the purification of waste gas of a drying apparatus The exhaust gas enters via an exhaust gas line into a washing apparatus. In the washing apparatus solid matter particles are predominantly separated. The pre-washed exhaust gas flows from the washing apparatus through a droplet removing conduit to a trick... | 03/06/2001 |
| 6102990 | Multistep gas scrubber apparatus A multiphase scrubber for the wet scrubbing of gases in several different phases comprises at least three separate basic scrubbing units so that the scrubbing of the gas is carried out in at least three, advantageously six, successive steps. The droplet s... | 08/15/2000 |
| 6102377 | Wet scrubbing spray apparatus for removing sulfur oxides from combustion effluents Sulfur oxides (SOx) are scrubbed from combustion effluents with economies in capital and operating costs by virtue of an arrangement of spray header piping and nozzles which permits ease of access for service with reduced spacing (e.g., 0.5 to ... | 08/15/2000 |
| 6068686 | Scrubber system and method of removing pollutants from a fluid A scrubber for removing pollutants from a fluid and having an inlet for receiving the fluid and an outlet for emitting the fluid, the scrubber comprising a first scrubber coupled with the fluid intermediate the inlet and the outlet for removing a first me... | 05/30/2000 |
| 6051055 | Exhaust gas desulfurization system An exhaust gas desulfurization system includes a spray pipe which is provided with a plurality of nozzles in the lengthwise direction and whose one end is closed and arranged horizontally in an absorption tower through which the exhaust gas passes vertica... | 04/18/2000 |
| 6036756 | Retrofit of a center inlet type scrubber with absorption/gas distribution tray to improve gas-liquid contact in the absorption zone An improvement in a center inlet type scrubber that retrofit the scrubber with a perforated tray made up of rectangular or partially rectangular sections supported on beam supports in the annulus of the scrubber. The supports can be modified to form turni... | 03/14/2000 |
| 6019816 | Systems and methods for removing residue from process gases exhausted from microelectronic device fabrication processes Process gases from microelectronic device fabrication processes are pumped through a filter unit including a plurality of absorbers for absorbing water entrained within the process gases. Residues deposited within the filtering unit are removed by sprayin... | 02/01/2000 |
| 6019819 | Apparatus and method for extracting heat from contaminated waste steam Disclosed is a contaminated waste steam heat recovery apparatus 10 and method therefore which includes a primary condensing unit 38, a low pressure water washing unit 26, a liquid to liquid heat exchanger 36 and a vent fan 31. Waste gas is ducted from fry... | 02/01/2000 |
| 6010559 | Mixing apparatus for gas scrubbing systems Gases containing solubles or suspended particles are mixed with a scrubbing liquid in a mixing apparatus having a chamber with a rotatable wheel mounted therein. The gas is mixed with a scrubbing liquid by the rotating wheel which has first and second scr... | 01/04/2000 |
| 5972078 | Exhaust rinse manifold for use with a coating apparatus Exhaust components of a coating apparatus can be cleaned to remove coating material therein and/or can be periodically treated so as to prevent the buildup of coating material with exhaust components. Moreover, coating materials and cleaning liquids can b... | 10/26/1999 |
| 5951743 | Method and apparatus for feeding exhaust gases to a wet scrubber The present invention discloses an exhaust gas conduit for feeding exhaust gases to a scrubber wherein the conduit is equipped with a self-cleaning device mounted inside the conduit body adjacent to an outlet end of the conduit for dispensing a cleaning s... | 09/14/1999 |
| 5879434 | Multi-washer and method of total cleaning of gases The invention relates to a multi-washer, and to a method of cleaning synthesis gases obtained by the gasification of wastes of the most varied composition. Such multi-washers are used to remove lumpy and adhesive materials from the synthesis gas, such as ... | 03/09/1999 |
| 5785901 | Gas-liquid contact apparatus An object of this invention is to provide a gas-liquid contact apparatus for use in wet flue gas desulfurizers and the like which is equipped with lightweight and inexpensive header pipes having excellent wear resistance and corrosion resistance and hence... | 07/28/1998 |
| 5756047 | Air purification method Scrubber sterilization method which initially sterilize a gas scrubber with an initial cleaning with hydrogen peroxide, provide an iodine level of approximately 5 to 10 mg/liter in water which is sprayed into the scrubber to contact the effluent gas strea... | 05/26/1998 |
