Reingas SCR – Zementwerk Rohrdorf AK-NOx Minderung 11.10.2011 Dr. Helmut LEIBINGER SPZ Rohrdorf Tail-End SCR Technology for Mitigation of NO x and NH 3 - Operational Experience at Rohrdorfer Zement Dr. Helmut Leibinger, SPZ Rohrdorf 7th International VDZ Congress, 25-27 September 2013, Duesseldorf
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Tail-End SCR Technology for Mitigation of NO Reingas … SCR – Zementwerk Rohrdorf AK-NOx Minderung 11.10.2011 Dr. Helmut LEIBINGER SPZ Rohrdorf Tail-End SCR Technology for Mitigation
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*) Mass flows in relation to 6.500 hours of operation per year2012: exkl. Plant stop because of fire
Mass flow NOx Mass flow NH3
[t/year]
Tail-End SCR Rohrdorf Operation Experience
NOx before cat
NOx stack
NH3 before cat
NH3 stack
Clin
kerC
oole
r Con
vers
ion
Clin
kerC
oole
r Con
vers
ion
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Tail-End SCR Rohrdorf Operation Experience
0,0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
0 2.000 4.000 6.000 8.000 10.000 12.000
K /K
0 [-]
Operating Hours [h]
Activity History of 1st Layer
Wood Chips*
Sub-bituminous Coal*
Bituminous Coal*
Light Fuel Oil*
Heavy Fuel Oil*
*Additional data based on Jensen‐Holm, Castellino, SCR DeNOx catalyst considerations when using biomass in power generation,Haldor‐Topsoe (2012)
Rohrdorfer Zement
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Tail-End SCR Rohrdorf Operation Experience
Kiln Exhaust Gas
sp. el. Energy Consumption of SCR
Production of Clinker
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Ecology
76 % abatement of NOx (setpoint 200 mg/m³ STP dry)
92 % abatement of NH3
40 % abatement of VOC
Operation Experience
90 % activity of catalyst after 2 years of operation
92 - 97 % availability of SCR-plant (start-up time excluded)
sp. electrical energy consumption: 5 - 6 kWh/tclinker
NH4OH injection at molar ratio < 1 (0,7 – 0,8)
Tail-End SCR Rohrdorf Resume
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Many thanks to:
Shareholders of Südbayerisches Portland-Zementwerk Gebr. Wiesböck & Co. GmbH who have made this projectpossible and have financally supported it to a great extent
Federal Ministry for the Environment, Nature Conservationand Nuclear Safety which has supported this project givinggrants from the Environmental Innovation Programme (Umweltinnovationsprogramm)