Abstract: A liquid separator comprises a vessel with an inlet for a liquid/gas mixture. The vessel defines a space sealed at the top by means of a lid in which is situated an outlet to discharge treated gas. A shield is provided in the space extending around the outlet as of the lid, and a filter element provided within the shield. An outlet zone is defined between the shield and the filter element, wherein the outlet zone is in connection with the outlet. The shield comprises a bottom wall with at least one inlet opening and connection means for attaching the filter element onto the bottom wall. The connection means is configured such that the filter element, in a mounted condition, extends around the inlet opening as from the bottom wall, within a chamber defined by the shield, the lid and the bottom wall.

Abstract: The present invention is an apparatus and method having dynamically reconfigurable air flow paths for supporting polishing and non-polishing operations. The invention includes a first baghouse section and a second baghouse section coupled to the first baghouse section via conduit. A set of valves is disposed along the conduit to direct air flow through the baghouse apparatus. A controller configures the baghouse apparatus by actuating at least one valve in the set of valves. The controller automatically configures the baghouse apparatus in either a polishing operation or a non-polishing operation based on a predetermined criteria.

Abstract: A filter device is proposed for cleaning gas entraining foreign bodies, including at least one filter unit having at least one filter surface on a raw gas side to which a raw gas stream containing foreign bodies can be supplied, wherein filtration aids can be supplied to the raw gas stream and/or the filter surface, and wherein filtration aids and/or foreign matter attached to the filter surface can be cleaned off. The filter device additionally includes a fluidized bed arrangement in which a carrier fluid stream can be generated such that cleaned-off filtration aids and/or foreign matter can be held at least in part as filtration aerosol in a surrounding of the filter unit and/or can re-attach to a filter surface.

Abstract: A robot cleaner is provided that may include a suction motor installed within a main body to generate a suction force, at least two conductive plates spaced apart from each other to form a flow path for external air introduced by the suction force, and a calculator to measure a capacitance value between the at least two conductive plates. Further, provided is a robot cleaner that may include a suction motor installed within a main body to generate a suction force, a porous structure having at least one through hole, through which external air introduced by the suction force may flow, at least one filter disposed on a surface of the porous structure to filter dust contained in the air, and a power supply configured to apply alternating current (AC) power to at least a portion of the surface of the porous structure.

Abstract: An ionization air purification system for the passenger cabin of vehicles, which modifies the degree of ionization by modifying the energy levels applied to the ionization tube or ionization source proportional to the change in air flow dynamics and air quality. In one embodiment, an ionization air purification system for the passenger cabin of a vehicle is disclosed. The system includes an ionization device for purifying the air prior to entering into the passenger cabin of the vehicle; and means for modifying the degree of ionization by modifying the energy levels applied to the ionization tube or ionization source proportional to the change in air flow dynamics and/or air quality.

Abstract: A modular ductwork assembly decontaminates an air stream circulating within a heating, ventilation and air conditioning (HVAC) system. The assembly includes one or more of (a) an ionizing module for removing particulates from the air stream, (b) a sterilization module for neutralizing airborne pathogens present in the air stream, (c) an ozone treatment module for neutralizing pathogens or odoriferous or gaseous constituents or volatile organic compounds (VOCs) present in the air stream, optionally (d) baffles for slowing and disrupting the flow rate and promoting turbulence in the air stream traveling through the modules, optionally (e) a fan module for directing a treated air stream, optionally (f) an ozone sensor, optionally (g) a monitoring or ozone control means, and optionally (h) a means of delivering and repurposing generated ozone. Each of the modules is arranged substantially adjacent to at least one of the other modules.

Abstract: An HVAC system having an air cleaner, a fan configured to selectively generate an air flow, wherein at least a portion of the air flow is passed through the air cleaner, and a controller configured to control the air cleaner in response to at least one of a setting for controlling the fan and an operation characteristic of the fan is disclosed.

Abstract: An air filtration system includes a frame directing an airflow through the air filtration system and a media filter. The media filter includes a plurality of media fibers arranged to capture particles flowing therethrough and a conductive surface located at the media filter and having a conductivity within a selected range. Two or more contact pads are located at the media filter and are alignable with an electrical circuit located at the frame to determine whether a resistance across the conductive plane is within a selected resistance range. A method of installing a media filter in an air filtration system includes inserting the media filter into a frame of the air filtration system and aligning one or more contact pads of the media filter with one or more grounding pads of the frame. A resistance across the media filter is measured.

Abstract: An HVAC system having an air cleaner, a fan configured to selectively generate an air flow, wherein at least a portion of the air flow is passed through the air cleaner, and a controller configured to control the air cleaner in response to at least one of a setting for controlling the fan and an operation characteristic of the fan is disclosed. A method of controlling an air cleaner by determining an air flow related criterion value, wherein the air flow is associated with an air flow through an air cleaner, comparing the determined air flow related criterion value to a threshold criterion value, and controlling the air cleaner as a function of a result of comparing the determined air flow related criterion value to the threshold criterion value is disclosed. A method of controlling an ozone concentration outputted by an air cleaner is disclosed.

Abstract: The method of modeling fly ash collection efficiency in wire-duct electrostatic precipitators provides for the optimization of fly ash collection through the generation of numerical solutions to the electrostatic and electrodynamic equations associated with the particular geometry of the wire-duct electrostatic precipitator. Particularly, the solutions are developed through use of the finite element method and a modified method of characteristics.

Abstract: Technologies are presented for applying electrical energy to a combustion reaction to produce agglomerated combustion particulates. For example, a system may include: one or more electrodes configured to apply electrical energy to a combustion reaction; a combustion zone configured to support the combustion reaction of a fuel at a fuel source; and an electrical power source operatively coupled to the one or more electrodes and configured to apply electrical energy to the combustion reaction. The combustion reaction is controlled to produce a distribution of agglomerated combustion particulates characterized by an increase in at least one of an average particulate diameter or an average particulate mass.

Abstract: A method of controlling operation of an electrostatic precipitator (6) is provided wherein a soot-blowing operation is performed in an upstream device. According to the method, a signal is sent to a controller (34) that a soot-blowing operation is about to be initiated in the upstream device (2). The controller (34) is operative for controlling performance of a rapping event with respect to the electrostatic precipitator (6), and causes a rapping decision (52; 152) to be made, based on receipt of the signal. The rapping decision includes establishment of a first point in time (T1) for initiating performance of a rapping event with respect to the electrostatic precipitator (6), such that said first point in time (T1) is correlated to a second point in time (T2). The second point in time (T2) is the time at which the soot-blowing operation of upstream device (2) is initiated.

Abstract: A method for monitoring operation of a rapper in an electrostatic precipitator using a rapper control system is described. The method includes determining model electrical characteristics of the rapper. The model electrical characteristics of the rapper correspond to model mechanical operating characteristics of the rapper. The method also includes storing data corresponding to the model electrical characteristics and the model mechanical operating characteristics of the rapper, determining actual electrical characteristics of the rapper, and comparing the actual electrical characteristics of the rapper to the stored model electrical characteristics to determine actual mechanical operating characteristics of the rapper.

Abstract: The present disclosure generally relates to cyclonic separation or filtering of nanoparticles suspended in a gas. A plume of liquid droplets may be generated using an ultrasound or other generator. The gas may be mixed with the plume of liquid droplets, which may have received an electrostatic charge prior to mixing, to promote preferential adhesion of the nanoparticles to the liquid droplets. The gas with suspended nanoparticles and suspended liquid particles may flow through a cyclonic separator that spins rapidly, causing the cleaned gas to flow out of the filter while the liquid with adhered nanoparticles may be discharged, collected, and/or re-used in the plume generator. By causing nanoparticles to adhere to larger liquid particles, the filter may allow the filtering and collection of much smaller particles than current systems may filter under atmospheric pressure.

Abstract: The method of modeling fly ash collection efficiency in wire-duct electrostatic precipitators provides for the optimization of fly ash collection through the generation of numerical solutions to the electrostatic and electrodynamic equations associated with the particular geometry of the wire-duct electrostatic precipitator. Particularly, the solutions are developed through use of the finite element method and a modified method of characteristics.

Abstract: An electrostatic precipitator and a method of removal of particulates from gaseous flows. A plurality of screens, secured in sets within a central chamber in a housing, comprise at least one set of electrically chargeable first screens and at least one set of electrically grounded second screens. For each set of chargeable screens, all the screens of the set are provided with an identical electrical charge, either positive or negative, and the set is provided with a plurality of spikes directed at the oncoming gaseous flow. At least one screen cleaning means selectively acts on the screens of each set. The precipitator can comprise a plurality of central chambers in a single housing or separate housings, and the chambers can be selectively activated or deactivated. The precipitator provides improved particulate removal from gaseous flows, including hot flows having temperatures up to at least 1200° C.

Abstract: Apparatus and methods for collection and removal of particulate matter, including fine particulate matter, from a gas stream, comprising a unique combination of high collection efficiency and ultralow pressure drop across the filter. The apparatus and method utilize simultaneous electrostatic precipitation and membrane filtration of a particular pore size, wherein electrostatic collection and filtration occur on the same surface.

Abstract: A system and method is provided for electrostatic air filtering in automotive vehicles, such as electric and hybrid electric vehicles. The system includes an electrical distribution system and an electrostatic filtering system having discharge electrodes and an accumulation electrode. The distribution system is in high-voltage electrical communication with the filtering system as well as an electric motor and a high-voltage energy storage device in the vehicle. In operation, the distribution system distributes high-voltage electric power to the filtering system. The filtering system receives the high-voltage electric power to generate a high-voltage electrostatic potential between the accumulation electrode and the discharge electrodes to remove particulates from air flowing through a region of the electrostatic filtering system.

Abstract: A method of operating a filtration system that filters flue gas, which includes particulate matter and a gaseous pollutant. The filtration system may include a fabric filter, which is cleaned with periodic pulse cleanings, a discharge electrode upstream of the fabric filter, which imparts an electric charge to at least some of the particulate matter before the particulate matter collects on the fabric filter, a sorbent, which is injected into the flue gas upstream of the fabric filter and absorbs at least some of the gaseous pollutant, and a fan, which draws the flue gas through the fabric filter. The filtration system may have a pulse cleaning interval setting that may be manipulated by an operator of the filtration system. The pulse cleaning interval setting may be the time between the pulse cleanings.

Abstract: A system and method for ionization detection in electrically enhanced air filtration systems is described. One embodiment includes a system for electrically enhanced air filtration, the system including an electrically enhanced filter having a filter and an ionizing electrode disposed on an upstream side of the filter; a control device connected to the electrically enhanced filter, wherein the control device can control the electrically enhanced filter; and an ionization detector, wherein the ionization detector is adjacent to the electrically enhanced filter and wherein the ionization detector is connected to the control device.

Abstract: The aim of the invention is to be able to adapt an item of visualization or optimization software with the least possible amount of effort made on any electrostatic filter configurations. To this end, the invention provides that the electrostatic filter, the high-voltage supply units, and the auxiliary functional units can be used by the software modules in the server component as objects with characteristic features and with characteristic methods, that are capable of being accessed as information, which only exists in the server component, for the client modules via data interfaces.

Abstract: A tower ionizer air cleaner is provided. The tower ionizer air cleaner includes a tower chassis, with a base of the tower chassis including a small footprint, one or more airflow inlet openings in the tower chassis, one or more airflow outlet openings in the tower chassis and substantially opposite to the one or more airflow inlet openings, and an ionizer element positioned within the tower chassis. The tower ionizer air cleaner further includes one or more fan units substantially vertically located within the tower ionizer air cleaner and affixed to the tower chassis. The one or more fan units are configured to provide an airflow between the one or more airflow inlet openings and the one or more airflow outlet openings and through the ionizer element.

Abstract: A method of controlling the dust particle emission from an electrostatic precipitator (1), which has a first and a second bus-section (16, 20), comprises observing that a rapping event of the first bus-section (16) is about to be initiated, verifying, before allowing the rapping event of said first bus-section (16) to be initiated, that the second bus-section (20), which is located downstream of said first bus-section (16) with respect to the flow direction of the flue gas in said electrostatic precipitator (1), is ready to receive the dust particles to be released during the rapping event of said first bus-section (16), and initiating, after said verification, said rapping event of said first bus-section (16).

Abstract: A method of operating a filtration system that filters flue gas, which includes particulate matter and a gaseous pollutant. The filtration system may include a fabric filter, which is cleaned with periodic pulse cleanings, a discharge electrode upstream of the fabric filter, which imparts an electric charge to at least some of the particulate matter before the particulate matter collects on the fabric filter, a sorbent, which is injected into the flue gas upstream of the fabric filter and absorbs at least some of the gaseous pollutant, and a fan, which draws the flue gas through the fabric filter. The filtration system may have a pulse cleaning interval setting that may be manipulated by an operator of the filtration system. The pulse cleaning interval setting may be the time between the pulse cleanings.

Abstract: An electric power supply of a discharge device which generates a streamer discharge is provided with a discharge control part. By virtue of the discharge control part, the discharge electric power of the discharge device is increased or decreased depending on the treatment amount of a component to be treated in an air purification device.

Abstract: A method for handling a fluid may be incorporated into the operation of, for example, a corona discharge device and an electric power supply. Such a corona discharge device typically includes at least one corona discharge electrode and at least one collector electrode positioned proximate each other so as to provide a total inter-electrode capacitance within a predetermined range. The electric power supply is connected to supply an electric power signal to said corona discharge and collector electrodes so as to cause a corona current to flow between the corona discharge and collector electrodes. A relationship between alternating and direct (or constant, non-time varying) components of the voltage may be expressed as (Vac/Vdc)?(Iac/Idc).

Abstract: An intense field dielectric air filtration system includes a perimeter frame for wall or ceiling mounting at the inlet of a return air duct for an air conditioning apparatus. A door including a grille disposed thereon is mounted for movement on the frame between working and non-working positions for access to an air filter unit, a pre-filter unit and an intense field particle charging unit. Contacts on the filter unit and the field charging unit engage cooperating contacts on an enclosure mounted on the frame when the door is closed to supply electrical power. An interlock is provided to interrupt power when the door is moved to an open position or the grille is removed. A control system disposed in the enclosure includes user control features accessible when the door is in an open position. An alternate embodiment includes a support frame for positioning the filtration system in ductwork or the like other than a return air inlet.

Abstract: An air cleaner is provided that includes one or more ionizing panels having at least one ionizing wire in connection with a voltage source. One or more collector cells separate from the one or more ionizing wire panels are releasably received within the air cleaner housing to establish an electrical connection between the collector cell and the voltage source for applying a voltage potential between the collector cell and the ionizing wire. The collector cell may be removed from the air cleaner to permit cleaning of the collector cell separate from the ionizing panels. The air cleaner monitors at least one variable indicative of the operation of the air cleaner. Upon determining that the variable has reached a predetermined level indicative of a significant amount of dust accumulation, a controller activates a light source to illuminate indicia on a display screen which indicates a need for servicing the air cleaner.

Abstract: A gas separation apparatus using electrostatic precipitators and mechanical rappers is enhanced by the addition of an opposite polarity refreshing power supply and a switching arrangement. The switching components selectively disconnect the primary power supply and connect the refreshing power supply to the electrostatic precipitator, causing an electrical impulse in the precipitator sufficient to dislodge precipitate from the collector plates. In one embodiment, an RC filter is further provided to control the impulse and reduce the burden that would otherwise be placed upon the refreshing power supply. In a second embodiment, a pair of SCR strings serve as the switches. Cleaning power is delivered from a capacitor through one of the SCR strings using a resonant circuit, the resonance which causes the SCR string to commutate off after the impulse has been delivered.

Abstract: An air cleaner is provided according to an embodiment of the invention. The air cleaner includes a power supply, an electrostatic precipitator cell, and a door. The door closes the electrostatic precipitator cell inside the air cleaner. The air cleaner further includes a door switch that is actuated by the door when the door is substantially closed. The air cleaner further includes a cell presence switch. The electrostatic precipitator cell actuates the cell presence switch when the electrostatic precipitator cell is at least partially inserted into the air cleaner. The cell presence switch and the door switch enable electrical power to be supplied from the power source to one or more air cleaner components when the electrostatic precipitator cell is at least partially inserted into the air cleaner and when the door is substantially closed.

Abstract: A dual-filter electrically enhanced air-filtration apparatus and method are described. One embodiment includes an upstream electrically enhanced filter; a downstream electrically enhanced filter; a first control electrode adjacent to an upstream side of the upstream electrically enhanced filter; a second control electrode adjacent to a downstream side of the downstream electrically enhanced filter; and an ionizing electrode disposed between the upstream and downstream electrically enhanced filters, the ionizing electrode having an electrical potential with respect to the first and second control electrodes. Optional field electrodes may be included to enhance the electric fields associated with the upstream and downstream electrically enhanced filters.

Abstract: An arrangement for treating room air has a first air quality sensor in an external air conduit of an air conditioning device. An ionization apparatus, an ozone sensor, an air humidity sensor, an airflow sensor, and at least one air temperature adjusting device are arranged in the supply conduit between air conditioning device and room. Chamber or hood devices forming a component of the room are coupled to the supply conduit. A side of the chamber or hood devices has openings ensuring convection of the supply air into the room. A recirculating air conduit branches off an exhaust conduit to the air-conditioning device. A second air quality sensor is arranged in the recirculating air conduit. A control device is connected to first air quality sensor, ozone sensor, air humidity sensor, airflow sensor, second air quality sensor, and the air temperature adjusting device.

Abstract: A method for continuously removing mercury from a supply of combustion gas is provided. The method includes adjusting a power input to an electrostatic precipitator to control a quantity of fly ash emitted from the electrostatic precipitator. A turbulent flow of combustion gas is produced to suspend particulate matter including the quantity of fly ash contained in the supply of combustion gas. A substantial portion of the mercury is absorbed within the particulate matter including the quantity of fly ash. The supply of combustion gas is filtered to remove the particulate matter from the mercury. A quantity of absorption sites available for absorbing mercury is controlled by monitoring an emission of fly ash from the electrostatic precipitator.

Abstract: Methods and apparatuses are provided for separating froth into liquid and gas components. One apparatus includes a container that is configured to hold froth therein and change at least a portion of the froth into substantially separate liquid and gas portions when an electrostatic charge is discharged through at least a portion of the froth between at least two electrodes at least partially arranged within the container.

Abstract: An intense field dielectric air filtration system associated with an air conditioning unit includes a microprocessor based control system which may be connected to the thermostat of the air conditioning unit to energize the air filtration system in response to a call for heat or cooling signal at the thermostat or startup of the fan motor for the air conditioning unit. The control system includes a power supply for the air filtration system together with voltage and current monitoring circuits for detecting a fault condition. Filtration system on/off and timing function reset switches are connected to the microprocessor and visual displays, including a multicolored LED bargraph display, are controlled by the microprocessor to indicate voltage potential applied to the air filtration system, a fault condition or a test mode.

Abstract: An air cleaner is provided according to an embodiment of the invention. The air cleaner includes a power supply, an electrostatic precipitator cell, and a door. The door closes the electrostatic precipitator cell inside the air cleaner. The air cleaner further includes a door switch that is actuated by the door when the door is substantially closed. The air cleaner further includes a cell presence switch. The electrostatic precipitator cell actuates the cell presence switch when the electrostatic precipitator cell is at least partially inserted into the air cleaner. The cell presence switch and the door switch enable electrical power to be supplied from the power source to one or more air cleaner components when the electrostatic precipitator cell is at least partially inserted into the air cleaner and when the door is substantially closed.

Abstract: Disclosed is an apparatus and method for controlling an air cleaning. The apparatus includes an air cleaning element, an AC high-voltage generator and a control unit. The air cleaning element generates negative ions and ozone using plasma discharge, and cleans indoor air using the negative ions and ozone. The AC high-voltage generator generates an AC high-voltage, and applies the AC high-voltage to the air cleaning element. The control unit varies at least one of the AC voltage and AC frequency applied to the air cleaning element by the AC high-voltage generator depending on a state of indoor air being cleaned using the air cleaning element. Therefore, it is possible to effectively generate negative ions while minimizing ozone generation to an acceptable level depending on a state of indoor air, thereby increasing air cleaning performance so as to sterilize and clean contaminants more efficiently.

Abstract: A method for operating a filter assembly having a filter medium includes applying a constant or nearly constant static DC potential to dust entering the filter assembly and the filter medium, passing dust-laden gas through the filter medium in a first direction through the filter assembly while the filter medium is statically charged with the DC potential, measuring pressure drop through the filter assembly, and, in response to the pressure drop meeting a preset limit, reversing the polarity of the DC potential to thereby allow dust particles on the filter medium to drop off the filter medium.

Abstract: A battery (16) drives an electric motor (17) which in turn drives a fan (18). A circuit board (20) controls the operation of the motor and fan to maintain the flow rate. Air is drawn through an inlet (22) and out through a vent (24). Foam discs (32) and (34) may extract particles from the air and an electrostatic filter may attract aerosols in the air.

Abstract: A spot ventilator and method for spot ventilating a localized environment of a building is provided. The spot ventilator includes a passage and at least one corona discharge apparatus. The passage extending between an inlet positioned in the localized environment and an outlet. The at least one corona discharge apparatus positioned in relation to the passage such that a fluid from the localized environment is drawn into the passage through the inlet and is expelled through the outlet. The method of ventilating a localized environment of a building includes the steps of sensing a first change in the localized environment, energizing a corona discharge apparatus to produce an electric wind, drawing air from the localized environment into a passage via the electric wind and expelling the air from the passage through the outlet.

Abstract: The present invention is embodied in a system for collecting biological samples from air including a collection assembly to store at least one biological sample and a separator to remove selected particles from the air prior to entry into the collection assembly. In one embodiment, the selected particles are magnetic and the separator includes at least one magnet to attract the particles from the air.

Abstract: A device for handling a fluid includes a corona discharge device and an electric power supply. The corona discharge device includes at least one corona discharge electrode and at least one collector electrode positioned proximate each other so as to provide a total inter-electrode capacitance within a predetermined range. The electric power supply is connected to supply an electric power signal to said corona discharge and collector electrodes so as to cause a corona current to flow between the corona discharge and collector electrodes. An amplitude of an alternating component of the voltage of the electric power signal generated is no greater than one-tenth that of an amplitude of a constant component of the voltage of the electric power signal.

Abstract: An apparatus for separating and converting exhaust particulates from a stream of exhaust gas, especially a diesel engine, into gaseous substances, in which the exhaust gas is guided through a honeycomb filter (6) made from a porous ceramic material whose axially extending channels (1, 2) are open merely at one face side of the filter and are closed off at the respective other face side, and a voltage is applied to electrodes (3, 4) extending parallel to the channels (1, 2) of the honeycomb filter (6). The closure of the channels (1, 2) at the face side is made in such a way that the channels (1, 2) each extending at the same normal distance from one of the electrodes (3, 4) are either all open or all closed off at their face side (9). The channels (1, 2) are mutually offset in a brickwork-like way.

Abstract: An air purifier device includes a fan unit in an electrically conductive housing for drawing ambient air into the housing via an air inlet, and an electrically conductive dust-collecting member in the housing and disposed adjacent to an air outlet. A detecting unit is operable so as to provide a control signal in response to at least one of a change in electrical characteristics of the housing due to body contact therewith, and a change in electrical characteristics of the dust-collecting member due to excessive accumulation of dust thereon. A power control unit is operable to supply electric power to a negative ion generating unit such that a drive voltage is applied to an ionizing member of the negative ion generating unit, and is responsive to the control signal from the detecting unit to interrupt supply of the electric power to the negative ion generating unit.

Abstract: The invention relates to apparatus and methods for generating and recycling fluorine. The applicants recognized that a fluorine separator, used either alone or in combination with a plasma generator can produce sufficient quantities of fluorine at its point of use for thin film processing. The fluorine separator can take the form of a condenser, a membrane separation device, a fluorine ion conductor comprising a solid electrolyte, or a combination of the foregoing. In some embodiments, reaction products comprising fluorine are passed to the fluorine separator. In other embodiments, separated fluorine is passed, either alone or in conjunction with additional feed stock comprising fluorine, to a plasma generator. The fluorine separator allows fluorine to be recycled and waste products to be eliminated from the system.

Abstract: A vapor filtration device including a first electrode, a second electrode, and a filter between the first and second electrodes is disclosed. The filter is formed of dielectric material and the device is operated by applying a first electric potential between the electrodes to polarize the dielectric material such that upon passing a vapor stream through the filter, particles from the vapor stream are deposited onto the filter. After depositing the particles a second higher voltage is applied between the electrodes to form a nonthermal plasma around the filter to vaporize the collected particles thereby cleaning the filter. The filter can be a packed bed or serpentine filter mat, and an optional upstream corona wire can be utilized to charge airborne particles prior to their deposition on the filter.

Abstract: An improved method and system is provided to control the rapping process used to clean the internal collection plates and discharge electrodes of electrostatic precipitators. The system obtains the performance characteristics of a first rapper and calculates a rapper lift value. The system then obtains performance characteristic data from two or more additional rappers and calculates rapper lift values for each of the rappers. Finally, the system compares the rapper lift value of each additional rapper and adjusts its performance characteristics so that it substantially approximates the performance characteristics of the first rapper.

Abstract: An improved method and system is provided to control the rapping process used to clean the internal collection plates and discharge electrodes of electrostatic precipitators. The system obtains the performance characteristics of a first rapper and calculates a rapper lift value. The system then obtains performance characteristic data from two or more additional rappers and calculates rapper lift values for each of the rappers. Finally, the system compares the rapper lift value of each additional rapper and adjusts its performance characteristics so that it substantially approximates the performance characteristics of the first rapper.

Abstract: An electrostatic air cleaner for installation in an air-circulating system, including a flow sensor for sensing the flow of air across the electrostatic air cleaner, and a switch, responsive to the flow sensor, for operating the electrostatic air cleaner only when the flow of air exceeds a predetermined threshold. More particularly, the electrostatic air cleaner includes an electrostatic air cleaner cover unit adapted to be secured over the opening in a frame in the air circulating system which frame contains at least one removable electrostatic air cleaning cell. The cover unit has a baffle for substantially blocking the air flow between the electrostatic air cleaning cell and the cover unit. The baffle has an opening therein, and a bypass tube is aligned with the opening in the baffle. An air flow sensor is disposed in the tube for sensing the air flow through the tube. The air flow sensor preferably includes a self-heating thermistor for sensing the flow in the bypass tube.

Abstract: An exhaust emissions filtering system for filtering of particulate matter from a flow of exhaust. The exhaust emissions filtering system comprises an ultrasonic transducer unit, an ultraviolet light unit, a magnetic particle filter unit, and an electronic control unit. The exhaust emissions filtering system removes particulates from exhaust emissions by fracturing the particles with the ultrasonic transducer unit, further breaking down the fractured particles with a high-intensity ultraviolet light, and removing the particles with an electrostatic mesh that is located in the magnetic particle filter unit.