Electrostatic precipitator,esp,working principle of esp in hindi,esp in power plant duration. An electrostatic precipitator esp is an device that removes dust particles from a flowing gas such as air using the force of an induced electrostatic attraction i. The main reason for problems in working of an electrostatic precipitator is the dust resistivity reentrainment and back corona these are due to the ionization volume and flow velocity of the particles. Electrostatic precipitator an overview sciencedirect. Electrostatic precipitator working principle, types. Electrostatic pr eci pitator elex we work for better air.
Esp operation electrostatic precipitators use electrostatic charges to separate particles from a dirty gas stream. An electrostatic precipitator esp is a particle control device that uses electrical forces to move the particles out of the flowing gas stream and onto collector plates. The precipitator consists of vertical parallel plates collecting plateselectrodes. Background a wet electrostatic precipitator wesp typically is used to control pm emissions in exhaust gas streams containing sticky, condensible hydrocarbon pollutants, or where the potential for explosion is high. In detail, these solid or liquid particles, are positively or negatively charged thanks to the application of a high voltage electric. We install this device in the way of flue gases from the furnace to the chimney so that the device can filter the flue gases before they enter the chimney. High voltage, direct current electrodes are used to establish a strong electric field. Electrostatic precipitation is an extremely efficient way of filtering fine particles from a flowing gas. The principle of electrostatic charge encompasses the force between two charges that are static or moving slowly in a medium.
The electrodes, through a corona effect, emit negatively charged ions into the gas which travel to the grounded collecting plates. Electrostatic precipitator free download as powerpoint presentation. Electrostatic precipitator construction, working, and its. What is the working principle of esp in a power plant. Esp to to remove the ash particulate matter from dust laden gas and is used in coal power plants. Electrostatic precipitators use up to 50% less energy than equivalently sized media air cleaners.
It has two sets of electrodes one is positive, and another is negative. Unlike media air cleaners and cartridge collectors that can lose up to 50% of its airflow with a dirty filter, electrostatic precipitators see an airflow drop of less than 5% when dirty. This manual should be of interest to both users and suppliers of electrostatic precipitators as well as advanced students on environmental based courses. Electrostatic precipitation definition is removal of suspended particles such as dust and acid mists from a gas such as air or blastfurnace gas by charging the particles and precipitating them by applying a strong electric field as by passing the gas between collecting and discharge electrodes in a precipitator. How electrostatic precipitators work trion iaq envirco. What is an electrostatic precipitator esp an esp is a device for the cleaning of dust particles from the harmful flue gases that are exposed out from the boiler of a steam power plant. Particles suspended in a gas enter the precipitator and pass through ionized zones around the high voltage discharge electrodes. But for the electrostatic precipitator electric field, there is always a maximum voltage, once more than the maximum voltage, the dust collector will produce spark discharge.
Electrostatic precipitator using weak corona discharge. Electrostatic precipitator working principle manufacturers, factory, suppliers from china, because we stay in this line about 10 years. Electrostatic precipitator electrostatic air cleaner. This charge is associated with rubbing surface valence electrons off and building up as a charged layer on the surface. Monitoring approach the key elements of the monitoring approach, including the indicators to be monitored, indicator ranges, and performance criteria are presented in table a. Secondary voltage and current are monitored in each field and the total power input to each esp is determined. Electrostatic precipitators have a very high collection efficiency upto 99%. In general, the output voltage of electrostatic precipitator is higher, according to the working principle of electrostatic precipitator, dust removal effect should be better.
Design and implementation of an electrostatic precipitator. The studies of the problems that arise during the working of an electrostatic precipitator are also the part of this thesis report. Principle of operation of electrostatic precipitator. In principle, the migration velocity is a very important empirical value for sizing, and with its help the efficiency of the dust removal can be calculated. This is the principle of electrostatic precipitation, and electrostatic precipitator apply this principle on an industrial scale. Working of electrostatic precipitator an esp works because of electrostatic attraction like charges repel. The electrostatic precipitator working principle is very simple. The outline and subjects of this previous study are shown as follows. Electrostatic precipitators esps can handle large volumes of air without significantly slowing down the rate of flow, because of the low pressure drop across the electrostatic filter.
An esp uses a high voltage electrostatic field to separate dust, fume or mist from a gas stream. What is an electrostatic precipitator and how does it. The shape of the two electrodes mainly depends on the type of precipitator employed like bars, plates, metal wires, etc. Design and optimisation of electrostatic precipitator for. When these fuels undergo combustion, smoke is produced. Electrostatic precipitator esp is a technique to remove particles in a gas stream using an electrostatic force turner et al. Components of electrostatic precipitator electrical4u. Wet electrostatic precipitators for pm control facilities i and p pdf 16 pp, 257 k, 1998.
Electrostatic precipitator meaning an efficient flue gas cleaning device esp means electrostatic precipitator is a device have been used for over half a century to control particulate emissions or dust cleaning device in many industries like power plants boiler,cement and steel mills. We got best suppliers support on quality and price. Plates are periodically rapped vibrated to make the collected particles fall. Electrostatic precipitator is a device which can remove airborne particles with highefficiency and low pressure drop. The particles are given an electrical charge by forcing them to pass through a corona, a region in which gaseous ions flow. Electrostatic precipitator article about electrostatic. Electrodes at high voltage create a corona effect ionized atmosphere surrounding them. Us34005a us57843566a us34005a us 34005 a us34005 a us 34005a us 57843566 a us57843566 a us 57843566a us 34005 a us34005 a us 34005a authority us united states prior art keywords repulser dust collector electrostatic precipitator prior art date 19660908 legal status the legal status is an assumption and is not a legal conclusion. Electrostatic precipitators have been used in various gascleaning applications almost for a century. A gas stream containing suspended particulates is allowed to pass between two electrodes electrically insulated from each other, and between which there is a. The electrostatic precipitator remains one of the most costeffective means of controlling the emission of particulates from most industrial processes. Construction, working, operation and maintenance of. Romil kumar electrostatic precipitator esp principle. The negative electrodes are in the form of rod or wire mesh.
Gea has been building electrostatic precipitators for cleaning industrial process for over many years. The basic principle of electrostatic precipitator is that gas borne particles mainly ash are ionised by the high voltage discharge electrode by the corona effect. Electrostatic precipitator does this work for afurnace system. The width of the precipitator is determined by the number of ducts required to achieve the desired flow velocity of about 1 ms. The precipitator functions by applying energy only to the particulate matter being collected, without significantly impeding the flow of gases. Most power stations burn fossil fuels such as coal or oil to generate electricity for use. Principle of operation electrostatic attraction efficiencyof99%inmanyindustries donnerstag, 12. Electrostatic precipitation definition of electrostatic. The ash particles ionise to negative charge and are attracted to the positive. Electrostatic precipitator uses the highintensity electric field to ionise the.
We are one of the bestknown early manufacturers of electrostatic air cleaner electrostatic precipitator in china since 1995. Jul 25, 2018 electrostatic precipitator does this work for afurnace system. An electrostatic precipitator esp is a filtration device that removes fine particles, like dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit in contrast to wet scrubbers, which apply energy directly to the flowing fluid medium, an esp applies energy only to the particulate matter being collected and. China electrostatic precipitator working principle. Electrostatic precipitator pollutioncontrol device. In our previous study, published as the reference 1, the two stage electrostatic precipitator esp, hereafter was used, composed of a front stage charger and a rear stage collector. Electrostatic precipitator components electrostatic precipitator working. You may need a pdf reader to view some of the files on this page.
Application of highvoltage power supply on electrostatic. Alphair is a trademark held by our company on our highquality electrostatic precipitator to remove exhaust fume and odor from hvac air systems, commercial kitchens, workshops, etc. Electrostatic precipitator, also called electrostatic air cleaner, a device that uses an electric charge to remove certain impuritieseither solid particles or liquid dropletsfrom air or other gases in smokestacks and other flues. When an electrostatic precipitator runs, we may experience a number of problems causing the performance to be much lower than expected. A gas stream with particulate material to be removed is introduced between the plates. Design and analysis of an electrostatic precipitator for a. Sep 25, 20 electrostatic precipitator esp working function 1. This article discusses an overview of an electrostatic precipitator which includes its operation, working principle, and its applications. A simple wireplate electrostatic precipitator esp was constructed in order to test the efficiency of collecting smoke particles from combustion of rubberwood that is used as a source of. The working principle of the electrostatic precipitator is quite simple. Electrostatic precipitators are mandatory nowadays in thermal power plants and other power plants where there is a discharge of flue gases. An electrostatic precipitator consists of electrically grounded plates with negativelycharged electrode suspended between them. The principle of the electrostatic precipitator is a well proven technology.
An electrostatic precipitator esp is a device that removes dust particles from a flowing gas such as air using force of an induced electrostatic attraction i. Esp electrostatic precipitator linkedin slideshare. The unclean flue gas flowing through the tube is supplied by two electrodes. Heikki torvela, in industrial ventilation design guidebook, 2001. Electrical operation of electrostatic precipitators iee.
It consists primarily of wires and collection plates, with a high voltage applied from an electrostatic field between the wires and the collecting. The electric charge on the electrode creates a corona field which imparts a negative charge to the particulate. An electrostatic precipitator is a type of filter dry scrubber that uses static electricity to remove soot and ash from exhaust fumes before they exit the smokestacks. Modeling and simulation of an electrostatic precipitator. Electrostatic precipitator nature physical sciences. The basic principle of an electrostatic precipitator esp is to give particles an electrostatic charge and then put them in an electrostatic field that drives them to a collecting wall. Once charged, particles are subject to a transverse electrostatic force that pulls them toward the collecting plates. Compliance assurance monitoring technical guidance. With ever increasing concern about environmental pollution and the need to reduce it, electrostatic precipitators have become a necessity. Working principle of electrostatic precipitator electrical4u. Electrostatic precipitator training redkoh industries manufactures electrostatic precipitator controls for three decades, including analog, solid state, and microprocessor type controls for the air pollution control industry in the usa and worldwide. Electrostatic precipitator working principles at its most basic, an electrostatic precipitator is an air purification tool that uses electrostatic force to grab and hold dust and other particles.