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GE Technology Selected to Lower Emissions and Rebuild Electrostatic Precipitator at Enel Maritza East 3 in Bulgaria - GE (NYSE: GE) was recently awarded a contract by Enel SpA to complete phase 6 of an 8-phase project at Enel Maritza East 3 (EME3) Thermal Power Plant in Bulgaria
GE Technology Selected to Lower Emissions and Rebuild Electrostatic Precipitator at Enel Maritza East 3 in Bulgaria

 

PRZOOM - /newswire/ - Kansas City, MO, United States, 2010/02/09 - GE (NYSE: GE) was recently awarded a contract by Enel SpA to complete phase 6 of an 8-phase project at Enel Maritza East 3 (EME3) Thermal Power Plant in Bulgaria. NYSE: GE

   
 
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During this phase, GE will convert two electrostatic precipitators (ESP) from tumbling hammer to GE’s advanced top rap technology, helping to increase reliability of the unit, lower maintenance costs and achieve lower emissions. GE commenced work on the four units at this power station in 2003, in a phased approach, during the now completed rehabilitation project of the power plant.

GE was awarded the top rap conversion of fields 3 and 4 of all ESPs for the four boilers in 2005. Execution of the project was staged to one boiler per year with final completion in 2008. The performance of the partially rebuilt precipitators was demonstrated to be successful, and in order to achieve an additional margin on the emission limits, EME3 decided to also rebuild fields 1 and 2 of the precipitators.

Electrostatic precipitators collect airborne particulates using electrical current to deposit the particles on large steel surfaces inside the precipitator. To maintain the collection efficiency of the system, the collector plates and high voltage discharge electrodes need to be regularly cleaned of dust by a rapping system. Cleaning on the original units at Maritza used rotating hammers mounted inside the precipitator. The hammer train components are exposed to the flue gas and suffer wear in the hostile environment. Having the rotating hammer train inside the precipitator precludes maintenance while the precipitator is on line, resulting in unplanned outages to repair the hammer trains.

GE's top-rap design mounts the rapping devices externally on the roof of the precipitator, allowing maintenance to the rappers while the precipitator is online. Since GE's top-rap technology does not make use of a mechanical hammer train, but rather uses a reliable electrically actuated rapper, maintenance is virtually eliminated. The rappers supplied by GE can be individually actuated as required, which allows the customer to optimize precipitator performance.

Top rapping is a means of cleaning the internal parts of the precipitator while keeping all the moving parts of the rappers out of the hot gas and dust stream. Each rapper can be programmed to act independently in terms of rapping intensity, rapping duration and rapper off time, so that when installed in conjunction with GE's sophisticated rapper controller, the cleaning of the internal parts can be varied infinitely if desired, to suit the specific application.

This latest contract will convert fields 1 and 2 of the Unit 2 precipitator to help achieve emissions below 50 mg/Nm3 (dry at 6% O2). The contract to rebuild fields 1 and 2 of the Unit 1 precipitator was awarded to GE in November 2008, and the project was successfully completed in August 2009. Currently, Fields 1 and 2 are configured as a rigid emitter frame, tumbling hammer design. GE previously reconfigured fields 3 and 4 of the Unit 2 precipitator to a top-rap design. As part of the new contract, the two inlet fields will be converted to the same top-rap design with components supplied by GE.

“Our proven technology and commitment to service has allowed us to be successful in the previous stages of the Enel Maritza East 3 project,” Mark Hachenski, product general manager for GE Energy Services. “Within the framework of the new contract, we will continue to work with Enel to meet the plant’s emission reduction needs.”

As part of the contract, all existing internal components will be removed to accommodate the new parts. The existing casing, inlet transition, outlet transition, hoppers, and structural supports will be reused as part of the rebuild scope. GE’s acclaimed rigid discharge electrodes will replace the existing wire frame discharge electrodes. Electromagnetic impact rappers will be mounted on the roof of the precipitator to impart cleaning force into the collecting plates and rigid electrodes. GE also is supplying acoustic horns to aid ash evacuation and prevent hopper buildup, which will minimize the possibility of unplanned maintenance and outages.

About GE
GE is a diversified global infrastructure, finance and media company that's built to meet essential world needs. From energy, water, transportation and health to access to money and information, GE serves customers in more than 100 countries and employs more than 300,000 people worldwide.

GE serves the energy sector by developing and deploying technology that helps make efficient use of natural resources. With 60,000 global employees and 2009 revenues of $37 billion, GE Energy ge.com/energy is one of the world’s leading suppliers of power generation and energy delivery technologies. The businesses that comprise GE Energy—GE Power & Water, GE Energy Services and GE Oil & Gas—work together to provide integrated product and service solutions in all areas of the energy industry including coal, oil, natural gas and nuclear energy; renewable resources such as water, wind, solar and biogas; and other alternative fuels.

For more information, visit the company’s Website age.com. GE is imagination at work.

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GE Technology Selected to Lower Emissions and Rebuild Electrostatic Precipitator at Enel Maritza East 3 in Bulgaria

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