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Topic: Electrostatic precipitator

	Electrostatic precipitator with precipitator electrodes - Patent 4239514
		An electrostatic precipitator in accordance with claim 9, wherein the spring strip includes two end portions which are slightly angled with respect to the remainder of the spring strip and are parallel to the outer edges of the precipitator electrodes.
		An electrostatic precipitator in accordance with claim 9, wherein the respective end of the spring strip is rigidly connected with the outer edge of the precipitator electrode by a permanent connection.
		An electrostatic precipitator in accordance with claim 16, wherein at least one of said spring elements is connected to two of said precipitator electrodes intermediate and at a distance from the ends of the latter.
	www.freepatentsonline.com /4239514.html (2286 words)

	Particulate Controls - Institute of Clean Air Companies
		Precipitator sectionalization has the added advantage that particles reentrained in the flue gas stream by rapping may be collected in downstream sections of the precipitator, thus minimizing net rapping reentrainment losses.
		Precipitator size also is related to the specific collection area (SCA), the ratio of the surface area of the collection electrodes to the gas flow.
		This fabric filter may be separate from the precipitator, as is being installed at a large utility plant in Texas, or may be installed into the last field of an electrostatic precipitator, as has been demonstrated at a plant in Alabama.
	www.icac.com /i4a/pages/index.cfm?pageid=3398 (2592 words)

	PPC Electrostatic Precipitator Technical Article
		Precipitators are designed to handle gas flow form 10,000 cfm to 300,000 cfm and can operate at temperatures as high as 750 degrees F. Normal gas flow through a precipitator is 2-5 feet per second, consequently, the pressure drip is only 0.5" wc.
		Electrostatic forces are applied directly to the particles and not the entire gas stream.
		Electrostatic precipitators have proven to be reliable workhorses in the wood products industry as more companies focus on profits.
	www.ppcesp.com /ppcart.html (1290 words)

	electro
		If an existing precipitator is not controlling fly ash emissions to the degree required in spite of the electrical and mechanical components of the precipitator being found to be satisfactory, then it is usually possible to use flue gas additives and/or electrical enhancement to significantly improve the overall efficiency of the electrostatic precipitator.
		Electrostatic precipitation and fabric filtration are the two main methods used to collect the fine particles of fly ash that are generated from coal combustion in power station boilers.
		In practice precipitator size and design characteristics vary considerably and in order for the precipitator to operate effectively it is important that the design incorporates uniform gas/fly ash distribution into the several parallel paths and that the gas velocity and temperature through the paths be within the design specification.
	www.acarp.com.au /Newsletters/electrostatic.html (3333 words)

	Elex - Electrostatic precipitator
		Optimum availability of the ELEX electrostatic precipitator is assured, which is as good as that of the upstream production plants such as kilns, boilers and mills.
		The electrostatic precipitator is suitable for the separation of solid particles.
		Evaporative coolers are installed primarily in the cement industry, but also in refuse incineration plants and other branches of industry.They create the required physical conditions at the electrostatic precipitator inlet which guarantee trouble-free operation.By spraying water into the flue gas, the dust is also cooled to the most efficient precipitator operating temperature.
	www.elex.ch /E/html/elektrofilter.html (810 words)

	Process for separating particulates in an electrostatic precipitator - Patent 5009677
		Such electrostatic precipitators have come into wide use because of their ability to separate extremely fine particulates, as low as one micron, and even less than one micron, from the gas stream efficiently and quickly and without any excessive pressure drop in the gas stream being passed through the precipitator.
		The gas enters on one side of the precipitator, sweeps to the opposite, and is thus unevenly distributed with the vast majority flow being on the far side of the gas inlet.
		One of the problems in the operation of a vertical tube electrostatic precipitator is that the gas which is introduced at the base of the precipitator is difficult to distribute uniformly through the precipitator.
	www.freepatentsonline.com /5009677.html (3221 words)

	Electrostatic Precipitator
		Electrostatic precipitators have collection efficiency of 99%, but do not work well for flyash with a high electrical resistivity (as commonly results from combustion of low-sulfur coal).
		A description of a more elaborate demonstration of how an electrostatic precipitator works using a Van de Graaff generator may be found at http://www.physics.umd.edu/lecdem/services/demos/demosj2/j2-15.htm.
		Electrostatic precipitators are not only used in utility applications but also other industries (for other exhaust gas particles) such as cement (dust), pulp and paper (salt cake and lime dust), petrochemicals (sulfuric acid mist), and steel (dust and fumes).
	www.eas.asu.edu /~holbert/wise/electrostaticprecip.html (535 words)

	Electrostatic Filters
		Electrostatic precipitators are commonly used to remove particles from airstreams having large steady flow rates.
		Small electrostatic precipitators designed for home or other non-industrial applications are known as electronic air cleaners.
		It eliminates all the negatives of an electrostatic filter, has no yearly maintenance, and is superior in its ability to purifier the air of a much broader range of air pollution, and does so throughout the entire house or building.
	www.inspiredliving.com /airpurifiers/electrostatic-filters.htm (665 words)

	How an Electrostatic Precipitator Works (Site not responding. Last check: 2007-11-03)
		Basically, in an electrostatic precipitator, particles caught in the flow of gas move through a collector chamber or passageway containing sets of electrodes in the form of parallel plates, bundles of tubes, or simply the collector's inner walls.
		In a simple electrostatic precipitator, opposite high voltages (plus and minus) are charged on two plates or grids.
		Explanation of a wet electrostatic precipitator by E-Tube.
	www.lehigh.edu /~kaf3/envt/HowanElectrostaticPrecipitatorWorks.htm (438 words)

	Compare Technology - Electrostatic Air Filters (Electrostatic Precipitator Air Cleaners) versus Biozone Air Purifiers
		A typical two-stage electrostatic precipitator has a stage of corona wires and a stage of collecting plates.
		The problem with electrostatic and all other air filters is that they can only remove the larger airborne particulates.
		Electrostatic air filters work by electrically charging particles so they are attracted to the metal plates in the machine.
	www.ourfamilyshealth.com /airpurifier/electrostatic.cfm (821 words)

	Compare Centrifugal, Media & Electrostatic Precipitator Mist Collectors - BreathePureAir.com
		Electrostatic precipitator mist collectors use high voltage to charge and gather the smaller mist particles and droplets.
		Electrostatic precipitator oil smoke and coolant mist collectors are perfect for petroleum based cutting oils, mist and smoke.
		Electrostatic precipitator collector cells when used to filter mist caused by petroleum cutting oils keep the collectors clean of dust and smoke buildup because the petroleum cutting oils do not evaporate.
	www.breathepureair.com /mist_four_technologies.html (1314 words)

	Envitech: Wet Electrostatic Precipitator Air Pollution Control System
		Envitech's Wet Electrostatic Precipitators may also be designed with an optional scrubber section for removal of acid gases.
		The Wet Electrostatic Precipitator uses high-intensity ionization disks mounted on a central discharge electrode.
		The greater the electrostatic field strength, the greater the particle migration velocity (velocity component towards the collection tube).
	www.envitechinc.com /wep.zhtml (218 words)

	Electrostatic Precipitator Sizing - Hamon Research-Cottrell
		Electrostatic precipitators have been used in many industries; several examples are cement, refinery and petrochemical, pulp and paper and power generation.
		Although the physical operation of a precipitator is simple and essentially the same for each industry, involving particle charging, collection, dislodging and disposal, the sizing of a precipitator is more complex combining both art and science.
		The size of the precipitator must be increased in these cases because the fine particulate is easily re-entrained into the gas stream.
	www.hamon-researchcottrell.com /Center_Fundamentals_03.asp (647 words)

	Electrostatic precipitator - Wikipedia, the free encyclopedia
		The layer does not collapse, thanks to electrostatic pressure (given from layer resistivity, electric field, and current flowing in the collected layer).
		A wet electrostatic precipitator (WESP) merges the operational methods of a wet scrubber with an electrostatic precipitator to make a self-washing, self-cleaning yet still high-voltage device.
		Plate precipitators are commonly marketed to the public as air purifier devices (such as the Ionic Breeze) or as a permanent replacement for furnace filters, but all have the undesirable attribute of being somewhat messy to clean.
	en.wikipedia.org /wiki/Electrostatic_precipitator (783 words)

	Dry Electrostatic Precipitator
		The dry electrostatic precipitator is employed on hot process exhausts (250 - 850 deg.
		The dry electrostatic precipitator typically handles collection of dust particles such as wood ash, incinerator ash, or coal ash from boiler or incinerator applications.
		Our dry electrostatic precipitator systems are attractive due to their ability to collect and transport the dust in a non wet condition.
	www.ppcbio.com /dry_electrostatic_precipitator.html (116 words)

	Electrostatic Precipitator - Search Results - MSN Encarta
		Electrostatic Precipitator - Search Results - MSN Encarta
		Electrostatic Precipitator, an electrical device for removing suspended impurities such as dust, fumes, or mist, from air or other gases.
		The National Inventors Hall of Fame is a U.S. organization founded in 1973 to honor successful inventors.
	encarta.msn.com /Electrostatic_Precipitator.html (116 words)

	1PPC - Electrostatic Precipitator Technology Page 2
		In the simplest terms, a precipitator is a large box.
		As oppose to conventional hoppers, the PPC precipitator hoppers have integral support members which simplifies supoort steel fabrication and structural steel erection.
		One of the most important considerations in design and operation of precipitators is the removal of collected material from the collecting surfaces without re-entraining it in the gas stream.
	www.ppcesp.com /brchpg2.html (451 words)

	Electrostatic Precipitator as a Generator Rather Than a Remover of Small Droplets
		The electrostatic precipitator (ESP) is used all over the world to clean particles from contaminated industrial and domestical air.
		The air cleaner consisted of a coarse filter, a corona wire, an electrostatic precipitator, a filter, and an air blower.
		When an electrostatic field of sufficient strength is applied to a liquid droplet, the droplet deforms into a conical shape; this is commonly called a Taylor cone (Figure 3c).
	pubs.acs.org /cgi-bin/jtextd?esthag/33/24/html/es990093o.html (2024 words)

	Electrostatic Applications: Parker (Site not responding. Last check: 2007-11-03)
		Increased awareness of the effects of atmospheric pollution and ever-tightening legislation have challenged the precipitation industry to increase performance at economical costs and operation of the precipitators has to be maintained at optimum levels to prevent penalizing consequences to plant operators.
		The technique of electrostatic precipitation has undergone considerable development over the past decades and is now the method of choice for limiting particulate discharges.
		Even the non-specialist will find this worthwhile as the basic theories of precipitation from both fluid and electrodynamic views are clearly presented.It also includes practical designs and gaseous and particulate features which impact precipitator performance.
	www.electrostatic.com /parker.htm (317 words)

	Beltran Electrostatic Precipitator (Site not responding. Last check: 2007-11-03)
		Repulsion forces (due to the likeness in charge) interacting between the electrode and thc particle, as well as forces of attraction between particle and grounded walls (grounded walls are "oppositely charged" as far as the particle is concerned) cause the particle to drift towards the walls of the tube where collection occurs.
		This "push-pull" effect is behind the electrostatic precipitators high collection efficiency and lower power requirements.
		For equal efficiencies, the tubular precipitator will be able to handle a greater volume of exhaust, thus a more compact design.
	www.beltranassociates.com /esp.htm (515 words)

	CONTROL SYSTEM FOR ELECTROSTATIC PRECIPITATOR POWER SUPPLY (US3622839)
		A sparking rate control system for electrostatic precipitators and the like wherein current supplied through a transformer to a rectifier connected to the precipitator is compared with a reference signal to produce an error signal for regulating the current supplied to the precipitator.
		This reduces the output of the integrator as well as the current supplied to the precipitator; whereupon the integrating action again increases the current until the next successive spark when the current is again reduced.
		The effect is to regulate the precipitator current and voltage near the value which provides a sparking rate set for optimum precipitator efficiency.
	www.delphion.com /details?pn10=US03622839 (217 words)

	Precipitator principles - electrostatic precipitators South Africa (Site not responding. Last check: 2007-11-03)
		Electrostatic precipitators South Africa Geecom OEM of electrostatic precipitators
		GEECOM are Original Equipment Manufacturers of electrostatic precipitators have supplied and installed control equipment as well as mechanical components for dry and wet Electrostatic Precipitators to major South African installations.
		Electrostatic precipitation removes particles from the exhaust gas stream of a process.
	www.geecom.co.za /principles.htm (192 words)

	Electrostatic Precipitator(TWEP) - Terng Woei Industry Co., Ltd.
		Terng Woei Industry Co., Ltd. Home : Products Product Description: Electrostatic Precipitator(TWEP), The reason for this is that approximately 95% of airborne dirt is composed of particles too small to be caught in the mesh of an ordinary filter.
		A Terng Woei air Precipitator, however, is non-selective as to particle size and will stop particles as small as 0.01 micron.
		The extent to which it is harmful is still not known, but ever-increasing research strongly points to polluted air as a contributing factor to many illnesses-particularly diseases of the respiratory and circulatory systems.
	www.allproducts.com /manufacture3/terngwoei/twep.html (439 words)

	Sho-Me Dictionary - C
		Is removed from the combustion Gases primarily by cleaning the gas with an electrostatic precipitator or by filtering it with a baghouse.
		With an electrostatic precipitator fly ash particles are given an electrical Charge as the gases pass through the precipitator.
		Periodically, the material collected by the precipitator or the baghouse is emptied into a collecting bin, or hopper, where it can be removed.
	www.shomepower.com /dict/c/coal_major_combustion_b00000666.htm (469 words)

	Wet Scrubbers&Electrostatic Precipitator Technology
		Envitech is a leading supplier of air pollution control systems for the treatment of medical, pathological, chemical, and industrial wastes.
		Our systems include high efficiency wet scrubbers, NOx scrubbers, packed tower scrubbers, and electrostatic precipitators for particulate and gaseous emission collection.
		Envitech’s Wet Electrostatic Precipitator is the most versatile air pollution control system on the market.
	www.envitechinc.com (268 words)

	Invent Now \| Hall of Fame \| Search \| Inventor Profile
		These charged particles were then electrically attracted to an electrode with an opposite charge, where they could be collected and retrieved as valuable minerals or chemical compounds.
		Cottrell's electrostatic precipitator, which became known simply as a 'Cottrell,' removed from 90 to 98 percent of all particles from escaping smoke and gases.
		In 1912, with the help of Charles Walcott, then secretary of the Smithsonian Institution, Cottrell founded Research Corporation, a nonprofit group that plowed money from the precipitator and other inventions back into the advancement of science.
	www.invent.org /hall_of_fame/34.html (268 words)

	Electrostatic Precipitator Equipment Links on Powder and Bulk Dot Com
		A multi-specialty engineering firm specializing in pollution, precipitation, flue gas conditioning, gasification, particulate removal, electrostatic precipitation, waste management and other air pollution control technologies.
		Providing electrostatic precipitator upgrades, improvement products and services for over 25 years.
		Designer and supplier of pre-engineered and custom-engineered air pollution control systems including fabric filters, electrostatic precipitators, wet or dry scrubbers, NOx control, flue gas conditioning, rebuild and parts services.
	www.powderandbulk.com /air/electrostatic.htm (201 words)

	PPC Biofilter, PPC Industries, Wet Dry Electrostatic Precipitator, Wet Dry ESP
		The dry electrostatic precipitator and wet electrostatic precipitator (wesp), are manufactured for particulate and opacity control of gas streams containing pm10, pm2.5 and condensable particulate emissions.
		The ESP technology is designed for flu gas desulferization and to remove boiler fly ash, sulfuric acid mist, cement kiln exhaust, coke oven exhaust, glass oven exhaust, incinerator exhaust and more.
		The dry and wet electrostatic precipitator products compete with the scrubber, venturi scrubber, bag house and high energy filter.
	www.ppcbio.com (205 words)

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