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World’s firstsinter planthybrid filter
CASE: ArcelorMittal Zenica sinter plant, Bosnia-HerzegovinaA turnkey solution to convert an existing Electrostatic Precipitator to a FLSmidth hybrid solution has reduced emissions below regulatory standards.
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Before and after the hybrid filter was installed at ArcelorMittal Zenica
FLSmidth hybrid filter solution at ArcelorMittal Zenica improved plant performance and reduced emissions while meeting future requirements
High productivity & environmental compliance
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Hybrid filter internal components
FLSmidth has successfully commissioned the world’s first hybrid filter on an ArcelorMittal sinter plant in Zenica, Bosnia-Herzegovina. This advanced technology answered ArcelorMittal’s need for a solution that would reduce emissions and improve plant performance.
Facing new regulations for dust emissions, ArcelorMittal needed to upgrade its existing electrostatic precipitators (ESPs). Using FLSmidth’s advanced filtration technology, the project involved revamping the plant’s ESP4 and its connection to the no. 5 sinter machine.
Rapid installationThe entire installation consists of an ESP and bag filter contained in one casing, making it a compact hybrid solution. The filter’s existing casing and hoppers were in good shape and could be retained in the new hybrid filter solution. It was successfully installed and commissioned in February 2017.
This included installing an entirely new compressor unit for cleaning the filter bags. The system also includes a lime injection system installed between the ESP and bag filter section, which protects the bags ensuring longer bag lifetime. Other additives can also be added to reduce emissions of other pollutants.
The compact hybrid filter installation is controlled with advanced FLSmidth control equipment, which has been incorporated into ArcelorMittal Zenica’s existing control system on sinter machine no.5.
A protective enclosure on top of the filter protects the installation from adverse weather conditions, while also allowing easier maintenance.
Proven hybrid technologyHybrid technology is already well proven in power plant boiler de-dusting systems and in cement plants. Delivering the same benefits as fabric filtration, it offers lower installation and operational costs as well as further improvements in the plant production and performance.
To develop the perfect setup for sinter plants, FLSmidth and ArcelorMittal conducted a year’s testing at a pilot project in ArcelorMittal Asturias in Spain.
Project Centre DenmarkFLSmidth A/S, AirtechVigerslev Allé 77DK-2500 ValbyCopenhagenTel: +45 3618 1000Fax: +45 3630 1820E-mail: [email protected]
Project Centre USAFLSmidth Inc.2040 Avenue CBethlehem, PA 18017-2188Tel: +1 610-264-6011Fax: +1 610-264-6170E-mail: [email protected]
Project Centre IndiaFLSmidth Private LimitedFLSmidth House34, Egatoor, Kelambakkam(Rajiv Gandhi Salai, Chennai)Tamil Nadu – 603 103Tel: +91-44-4748 1000Fax: +91-44-2747 0301E-mail: [email protected]
Copyright © 2017 FLSmidth A/S. ALL RIGHTS RESERVED. FLSmidth is a (registered) trademark of FLSmidth A/S. This brochure makes no offers, representations or warranties (express or implied), and information and data contained in this brochure are for general reference only and may change at any time.
Since commissioning, dust emissions have been reduced well below allowable limits and the sinter plant’s performance increased more than 10%. Total air volume for the filter is 368,558 Nm3/h and sintering speed has increased from 2.09 m/min to 2.17 m/min.
Furthermore, concentration of oxygen in off-gases has been reduced by 1.5%, while the temperature in the filter entrance has been increased from 64.9°C to 88.2°C. This is due to more effective sealing and prevention of air leakages, one of the most important parameters of successful sintering. This also extends the filter’s life.
Emir Grmalic, Director of ArcelorMittal Zenica’s sinter plant and project leader is satisfied with the new solution, commenting: “The hybrid filter is the latest technology in filtering. We are very proud at ArcelorMittal Zenica to be the first company in the world to have successfully installed it. Our preliminary control measurements of hybrid filter dust emissions are below 5 mg/Nm3, and we can say that we have fully achieved our goal to reduce dust emissions. This project brings significant improvements both in terms of our environmental performance and the sintering process in the plant. No less important is the fact that during the project implementation, we had a significant number of workers on site who were working at height – but we had zero injuries during the project. This is the result of the commitment and effort of all those who participated in the project.”
Results
Preliminary performance test conducted by FLSmidth Airtech and witnessed by Arcelor Mittal Zenica staff
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