A TEC GROUP

Alternative fuel system for kiln riser duct firing at CRH Slovakia

In 2017 A TEC and CRH Slovakia have installed an alternative fuel system for kiln riser duct firing in Turňa nad ­Bodvou/Slovakia. The Turňa 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 retention time of approx. 3 sec, so up to approx. 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 height 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 25 % of the total fuel as SAF with main burner quality can be fired in the kiln riser.

www.atec-ltd.com

x

Related articles:

Issue 2017-3 WO 2017/001638 A1

Process for producing cement using a secondary fuel

(22) 30.06.2016 (43) 05.01.2017 (57) The invention provides a process for producing cement, the process comprising providing heat to a cement manufacturing process using a secondary fuel, wherein the...

more
Issue 2018-7-8 EP3317231 (A1)

Process for producing cement using a secondary fuel

(22) 30.06.2016 (43) 09.05.2018 (57) Summary of the corresponding patent WO2017001638 (A1): The invention provides a process for producing cement, the process comprising providing heat to a cement...

more
Issue 2020-4

“Efficiency – what is that?” – How to measure the performance of a kiln line?

In the past editions I have written in a rather abstract way about “process optimization” time and time again – and you may be asking yourself: what does that mean in a specific case? The question...

more
Issue 2015-11 US 2015/0265989 A1

Cement production system

(22) 05.11.2013 (43) 24.09.2015 (57) The invention relates to a cement production system with a preheater for preheating the cement raw meal, a calciner for pre-calcining the preheated cement raw...

more
Issue 2015-11 WO 2015/133161 A1

Cement burning apparatus, and method for denitrating exhaust gas from cement kiln

(22) 08.01.2015 (43) 11.09.2015 (57) [Problem] To efficiently reduce the concentration of NOx in an exhaust gas from a cement kiln while keeping the burned state at a good level regardless of the type...

more