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Patent Searching and Data


Matches 901 - 950 out of 7,738

Document Document Title
WO/1998/013141
Improved ionizing structure (10) for ambient air treatment wherein the structure (10) incorporates an ionizing needle (29) directed in the direction of airflow; the needle (29) is negatively charged to produce an electrostatic field, pre...  
WO/1998/011992
Apparatus and method for agglomerating fine particles in a gas stream. Larger particles are introduced into the apparatus and imparted with an electrical charge opposite in polarity to the charge imparted to the fine particles to be aggl...  
WO/1998/010868
The invention relates to a device in connection with an electrostatic precipitator (1) for cleaning a gaseous medium from particles that are present in said medium, said device including an ionizing portion (2), separating portion (4), e...  
WO/1998/004354
A clog-resistant filter (24) for extracting fine particulate contaminants, such as smoke, from a gaseous fluid stream, such as air, uses an induced voltage electrode (202) to efficiently capture the contaminant particles in a filter mate...  
WO/1998/005106
An electrostatic precipitator is provided within the housing (14) of a gas discharge laser (10), such as an exciter laser, to collect and trap dust particles generated in the course of laser operation. The precipitator comprises a plural...  
WO/1998/003429
A barrier discharge SO�2? to SO�3? converter for conditioning flue gas entering an electrostatic precipitator (ESP) comprising at least one electrode surrounded by high resistivity, high dielectric strength barrier secured at a dista...  
WO/1997/049904
The invention discloses a device for filtering (1) internal combustion engine exhaust gases, comprising an electrostatic filtering chamber (10) equipped with electrostatic filtering means (20), a line (13) for supplying gases into the ch...  
WO/1997/048652
The invention relates to a method of regulating the flue gas temperature in a cement production plant comprising a kiln (1), a flue gas conditioning device (2), a mill (3) and an electrostatic precipitator (4), whereby the flue gas from ...  
WO/1997/046322
The present invention refers to a precipitator having a through-flowing passage for the air to be purified, said precipitator being intended to be included in an air purification device, especially for purifying air from electrically cha...  
WO/1997/043044
The present invention relates to electrostatic precipitators which are used to remove particulate matter from gas flows, particularly from flue gas produced by electricity power generating stations. The present precipitators are bulky an...  
WO/1997/041958
A method for controlling the electrode cleaning of an electrostatic precipitator unit (1, 2, 3), comprising discharge electrodes and collecting electrodes, between which a high voltage is maintained. Dust deposited on the collecting elec...  
WO/1997/041959
A method for controlling an electrostatic precipitator unit, comprising discharge electrodes and collecting electrodes, between which a high voltage is maintained by a direct current supplied to the electrodes. Dust deposited on the coll...  
WO/1997/039817
There is provided a vacuum cleaner filter medium which is a nonwoven spunbond web of conjugate spunbond fibers. The web has a Frazier permeability of at least 250 CFM, an NaCl efficiency of at least 65 percent, a Gurley Stiffness of at l...  
WO/1997/039816
Systems and methods for operating gas cleaning devices (20) utilize vibration generators (22, 24, 26) wherein the systems include sensors (30, 32, 34) and programs for monitoring and predicting resonant conditions of different surface zo...  
WO/1997/035666
A method for controlling an electrostatic precipitator unit, which comprises discharge electrodes and collecting electrodes. Between the electrodes a varying high voltage is maintained by a pulsating direct current supplied thereto. Dust...  
WO/1997/035667
A method for controlling an electrostatic precipitator unit, which comprises discharge electrodes and collecting electrodes. Between the electrodes a varying high voltage is maintained by a pulsating direct current supplied thereto. Unde...  
WO/1997/034701
An exhaust system (400), such as for a motor vehicle, which releases emissions to atmosphere includes a corona discharge cell (408) with an ion emitter therein, whereby particulate pollutants passing through the system are electrically c...  
WO/1997/035378
A power supply system particularly adapted for use with an electrostatic precipitator to provide substantially ripple-free DC power for improved precipitator operation. The power supply is adapted to receive three-phase AC power and to t...  
WO/1997/030771
There is provided a nonwoven electret fiber filter formed with a nonwoven web of electret fibers needle-punched to an open scrim support. The scrim support material has individual discrete open areas with an average cross-sectional area ...  
WO/1997/030274
The invention relates to a device for the cleaning of exhaust gases from internal combustion engines, in particular a diesel exhaust soot filter. Said device has a discharge electrode (8), a counterelectrode (28) opposite thereto for ele...  
WO/1997/028883
A method of precipitating airborne particles from air comprising contacting the airborne particles with liquid droplets from a domestic aerosol spray device, a unipolar charge being imparted to the liquid droplets during the spraying of ...  
WO/1997/028902
An electrostatic air purification machine comprising a discharge electrode (4), a counter electrode (3, 31 or 32), a gas adsorption means having a gas removing capability and disposed on the counter electrode side. The dust in the air is...  
WO/1997/025448
Disclosed is a method for beneficiating trona from a feedstream containing trona and impurities by a dry separation method, namely, electrostatically separating a first portion of impurities from the trona at a temperature between about ...  
WO/1997/024515
A method and an apparatus for cleaning smoke and reducing noises of an internal combustion engine or external combustion engine by using high voltage field. The present invention relates to a method and an apparatus which can clean exhau...  
WO/1997/023294
Air filtration apparatus comprises a casing (12) with an inlet (14) and an outlet (16). A fan (18) draws air through the apparatus into a corona discharge cell (20) to charge pollutant particles which are subsequently collected on an ele...  
WO/1997/023267
The present invention provides a self-supporting laminate filter medium having an electret lofty spunbond web and an electret microfiber web, wherein the spunbond web has a density between about 0.01 g/cm3 and about 0.1 g/cm3.  
WO/1997/023246
A breathing mask fabric is provided which has between 50 and 95 weight percent of a through-air bonded, electret treated, nonwoven microfiber first web of fibers where the fibers have an average diameter of between about 10 and 25 micron...  
WO/1997/022400
In a method for separating dust from hot process gases, the process gases are passed via a gas inlet duct (4, 10) through a dust separator (5), in which dust is separated from the process gases, part of the separated dust being conducted...  
WO/1997/019740
A purging electrostatic gun (10) includes a housing (20) wherein a charging electrode (36) is maintained that is electrically coupled to receive a high voltage (18) and is axially centered in a cylindrical barrel charging section (26) wh...  
WO/1997/018899
System for treating gases or liquids by means of corona discharge, comprising: a) a corona discharge space through which the gases or fluids to be treated are guided; b) a corona wire inside the corona discharge space; c) a source for su...  
WO/1997/018884
The invention relates to a method of operating a surface filter (1) with a housing (2), filter elements (5, 16) inside the housing, a crude gas inlet (3) and a purified gas outlet (4), and to a filter (1) for applying the method. In orde...  
WO/1997/017138
An oscillating circuit comprises a first group of a static switch protected by DSAS or BOD diodes, under the protection of free-wheeling diodes in parallel; a second group of at least one storage-capacitor at direct current defined by a ...  
WO/1997/009117
Electrostatic precipitator for purifying air from charged particles, said electrostatic precipitator being composed of electrode elements (R and A) or groups of such elements that are charged in a suitable way and alternately arranged at...  
WO/1997/006891
The invention relates to a process for operating an electric filter for gaseous fluids containing impurities, especially in a crankcase ventilator for an internal combustion engine, in which the electric filter is fitted in the ventilati...  
WO/1997/005955
Any exhaust fan is unnecessary, and any special apparatus for preventing dust from again flying is unnecessary. A combustion furnage is formed on a building, and a funnel contiguous to a furnace wall is erected. The periphery of the funn...  
WO/1997/000727
A device in an electrostatic precipitator for suspending, controlling and rapping one or more collecting electrodes (2) arranged essentially vertically in one or more substantially parallel rows (1), said device comprising for each row (...  
WO/1997/000717
A filter is provided which includes an organic vapor adsorbing layer, a first particulate removal layer, and a second particulate removal layer. The organic vapor adsorbing layer includes porous adsorbent beads which allow air or gas to ...  
WO/1997/000114
Disclosed are novel composite fibrous structures which have utility as filters. These composite structures have at least two layers. The first layer is a nonwoven fibrous structure made from uniquely grooved fibers. The second layer is o...  
WO/1997/000139
A process and device are disclosed for influencing liquid drops in a gas stream. Surfaces that generate electric charges because of their high temperature are introduced into a flow section.  
WO/1997/000116
A process and device are disclosed for separating liquid droplets from a gas stream. Shaped elements that form very narrow flow passages are inserted into the flow path of the gas.  
WO/1996/040437
An electrostatic air cleaner has at least one hole in one of the plates over which air with charged dirt particles is passed. A light source is mounted adjacent to the hole so as to direct its light through the hole. A light sensor detec...  
WO/1996/040436
The present invention discloses a process for removing undesired particles (35) from a gas stream (36) including the steps of injecting (10) by the use of nozzles (37) a composition containing an adhesive (40) into contact with the gas s...  
WO/1996/038229
An apparatus for ionizing air to remove particulate matter. The apparatus comprising an ionizer and a bracket for mounting the ionizer in a duct or enclosure. The ionizer includes a series of electrodes which span a portion of the duct. ...  
WO/1996/036483
There is disclosed an allergen particle exclusion covering comprising a permeable composite fabric of which one component is a porous fabric having electrostatic charge which traps particles in the pores.  
WO/1996/036421
A process is proposed for the dry desulphurisation of a combustion gas. Dust is removed from the combustion gas produced in a combustion chamber and contaminated with fly ash and toxic gases; the combustion gas is then cooled with water ...  
WO/1996/035513
An air purifier, in particular an electrostatic air purifier, has a housing with an inlet nozzle (3) and an outlet nozzle (4) for an air flow (L) to be purified that is supplied to an air purifying unit (10) arranged inside the housing. ...  
WO/1996/035512
The invention relates to a cyclone for separating fine particles from a stream of gas, especially soot from the exhaust gases of internal combustion engines. According to the invention, a spray electrode (10) electrically insulated from ...  
WO/1996/033539
A device for transporting air with the aid of so-called electrical ion-wind, said device including at least one corona electrode (10), e.g. thread shaped, that extends transverse to the air flow path, and at least one target electrode (1...  
WO/1996/031939
A high voltage power supply (40) having a plurality of high voltage generators (50a, 50b,... 50j) that produce a controlled current in a load (24) having a capacitive component. Each high voltage generator consists of a pulsewidth-modula...  
WO/1996/031281
The invention relates to a method and to an apparatus for cleansing or purifying dust-laden gases, particularly hot process gases, with the aid of an electrostatic filter device (1; 1') which includes at least one emission electrode (5; ...  

Matches 901 - 950 out of 7,738