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In 2017 A TEC and CRH Slovakia have installed an alternative fuel system for kiln riser duct firing in Turna Nad Bodvou, Slovakia. The Turna Nad Bodvou cement plant has already operated a SAF system for the main burner which consists mainly of a double truck docking station and a dosing system.
The riser duct itself has a gas residence time of approx. 3 sec, so up to 25 % TSR at the riser duct are possible by limitation of the material to max. 50 mm (2D) size. The SAF is now injected above the bypass take-off point (in the location of the current meal inlet). To limit the CO emissions, a hot ignition zone has been created at the SAF injection. This was realized by moving the existing meal inlets to the riser duct of about 8 – 10 m.
As the kiln is equipped with an extended kiln riser duct (without tertiary air) it is possible to fire a significant amount of fuel in this kiln riser duct. Now about 20 % of the total fuel as SAF with main burner quality can be fired.
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About A TEC
A TEC Production & Service GmbH is an engineering and technologies company located in Austria. It is focused on optimization and efficiency improvement of cement plants. In total, A TEC has successfully completed more than 600 cement plant optimization projects.
Part of modern cement plant operation is the usage of alternative fuels. A TEC can offer the complete AF system for nearly any kind of solid and liquid waste materials including material handling, preparation, storage and feeding into the kiln.
Besides A TEC’s core business of cement plant optimization, A TEC provides consultancy and overall project management and supervision for Greenfield and Brownfield projects (e.g. EPCM), including assistance in tendering process and assistance with environmental and other local norms and standards.
