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Electrostatic Precipitators (ESPs) - Alstom (1).pdf

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© ALSTOM 2013. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited. Photo credits: ©
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  © ALSTOM 2013. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited. Photo credits: © ALSTOM 2013. All rights reserved. Printed on environmentally friendly paper.     T    P    W    /    B    P    R    O    S    /    E    S    P    B    R    C    1    2    /    E    N    /    E    C    S    /    1    0 .    1    3    /    C    H    /    7    7    0    9 Alstom’s wide rangeof ElectrostaticPrecipitators (ESP)designs offer the bestfit for all applications,optimising emissioncompliance andsaving power. Meeting the most stringent regulation with the lowest cost Electrostatic Precipitators (ESP) are widely accepted across the world as an effective system for particulate emissions control. Alstom Electrostatic Precipitators, offer a reliable solution to the demands of increasingly strict regulations for particulate matter emissions worldwide, at the lowest lifecycle cost. ESPs work by creating a high voltage electrical field (corona) around the discharge electrodes, which causes the gases and the dust particles being carried by the gases, to get ionised. The dust particles, once charged, migrate to and deposit themselves on the neutral collecting plates, from which they are dislodged by periodic rapping and guided to dust hoppers for removal.Alstom offers a wide range of ESP designs, with a choice of discharge electrodes and rapping systems, to provide the most cost effective, technically reliable solution for every application.  APPLICATIONS ã Power and industrial boilers firing coal, lignite, oil, orimulsion, biomass and other fuels ã Various processes in iron and steel and non-ferrous metallurgical industries, cement industry, incineration plants, glass smelting and pulp & paper plants, etc.  AIR QUALITY CONTROL  SOLUTIONS Electrostatic Precipitators Effectively improving the environment Customer benefits HIGH PARTICULATE REMOVAL EFFICIENCY Emission levels less than 10 mg/Nm 3 . CUSTOMISATION Choice of discharge electrodes customised to specific demands of various applications. INCREASED AVAILABILITY Robust design and construction ensures reliability. REDUCED COMPLIANCE COSTS Integrated control system optimises power savings while maximising performance. LOWER INVESTMENT Easy to install due to flexible layout and modular design. PROVEN DESIGN Proven technology fine tuned with global experience and a large installed base.  LOWERINGENVIRONMENTAL FOOTPRINT <10  mg/Nm 3  emissions achievable using our ESP Solutions and Technology. Alstom has a strong reference base of more than 4,500 successful ESP installations worldwide including 230 GW eqv. in power generation. © ALSTOM 2013. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited. Photo credits: © ALSTOM 2013. All rights reserved. Printed on environmentally friendly paper.     T    P    W    /    B    P    R    O    S    /    E    S    P    B    R    C    1    2    /    E    N    /    E    C    S    /    1    0 .    1    3    /    C    H    /    7    7    0    9 To find out more about Alstom’s ESP technology and applications,please contact your local Alstom representative: Alstom PowerBrown Boveri Strasse 75401 BadenSwitzerland Visit us online: www.alstom.com  AIR QUALITY CONTROL  SOLUTIONS ELECTROSTATIC PRECIPITATORSSCOPE OPTIONS EPC OPTION Design, engineering, supply, erection and commissioning with or without civil works EP OPTION Design, engineering and supply with advisory service during erection and commissioning SERVICES ONLY Operation and maintenance services TECHNICAL SPECIFICATIONS PM removal efficiencyapprox. 99.95%Emission level< 10 mg/Nm 3 Corona power consumption1 – 10 W/m 2 3 STEPS TO MAXIMISE PERFORMANCE 1 Optimum charging of the dust  is fundamental to effective ESP performance and this is achieved by perfectly matching the choice of the discharge electrode design to the demands of the application. ã The Alstom spiral discharge electrodes ensure uniform corona current distribution and is universally recognised as the most effective solution for medium and high resistivity dust. ã The Alstom multi-peak discharge electrodes are best suited for applications involving low resistivity dusts or dusts having large amounts of fine particles. 2 Effective Cleaning System design helps prevent dust building up on the collecting plates, minimising the “back corona” effect, which otherwise diminishes the efficiency of the ESP, especially if the dust resistivity is high. ã Alstom uses a robust tumbling hammer design which is most effective in dislodging even the most resistant dust from the electrodes, to ensure consistently high efficiency of the ESP. ã Alstom also offers, Electric Impact Rapping (EIR) for applications involving low resistivity dust, where relatively mild rapping is sufficient. The design of the EIR is simple and easy to maintain as all the moving parts are accessible from outside the flue gas path. 3 High quality Integrated ESP Control systems ensure optimised performance of the ESP ã Alstom’s Electrostatic Precipitator Intelligent Controller (EPIC III) is a 3 rd  generation state-of-the-art ESP control system that delivers –optimum performance and power savings thanks to a range of operating modes –rapping sequence optimisation and power controlled rapping as well as self-optimisation algorithms (EPOQ) ã Alstom also offers the Switch Integrated Rectifier (SIR) high frequency output power supplies, which ensures maximum power injection without sparking and is highly effective for low and medium resistivity dusts. TYPICAL ESP LAYOUT AND KEY COMPONENTS Gas distribution screensPower supplyCasingCollecting electrodesDischarge electrode systemBottom arrangement (pyramid hoppers, trough hoppersor scrapers, baffles)Rapping mechanism for discharge and collecting electrodes STATE-OF-THE-ART LABORATORY AND TESTING FACILITIES Highly-skilled engineers and technicians from Alstom’s R&D Execution Centre in Växjö, Sweden support our customers and the further development of our ESP technology solutions.
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