475 Technical Solutions for Reduction of Waste Fuel Specific Emissions Flue Gas t reatment Innovative Technical Solutions for Reduction of Waste Fuel Specific Emissions in Cement Plants


Renato Sarc, Roland Pomberger, Karl E. Lorber



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2017 WM 475-498 Sarc

Renato Sarc, Roland Pomberger, Karl E. Lorber

480

Flue 

Gas T

reatment

Mauschitz (2016) reports following frequently used RDF and their LHVs: 

•  SRF, LHV:  

19,400 MJ/t

OS

,

•  end-of-life-tyres, LHV:  



29,330 MJ/t

OS

,



•  residuals from paper industry, LHV:   4,850 MJ/t

OS

,



•  used solvents, LHV:  

25,420 MJ/t

OS

,

•  waste oil, LHV:  



32,850 MJ/t

OS

.



Regarding SRF, it has to be noted, that in the cement industry following SRF specifica-

tions with well defined qualities (LHV, particle size (d

95

 in [mm]) etc.) are used [29]:



•  SRF medium quality: having d

95

 ≤ 80 (for Hotdisc: d



95

 ≤ 300) mm and 12 ≤ LHV ≤ 

18 MJ/kg

OS

 which is used for energy recovery in secondary firing systems of cement 



kiln and/or in special pre-combustion chambers like Hotdisc and 

•  SRF premium quality: having d

95

 ≤ 30 (up to 35) mm and 18 ≤ LHV ≤ 25 MJ/kg



OS

 

that is used for energy recovery in primary firing system of cement kiln.



0

50,000


100,000

150,000


200,000

250,000


300,000

SRF


End-of-life tyres Residuals from 

paper industry

Waste solvents

Waste oils

2010

2011


2012

2013


2014

2015


Input quantities

t/y


Figure 6:   Quantities of selected RDF used in the Austrian cement industry, time period 2010 to 

2015 


Source:   Mauschitz, G.: Emissionen aus Anlagen der österreichischen Zementindustrie (Emissions from plants of the Austrian 

cement industry). Report. Vienna: Vienna University of Technology, 2016

Waste fuels that make up the biggest share of RDF are SRF medium and premium 

quality. Since the beginning of the nineties, RDF has experienced a massive increase 

as alternative fuel burnt in Austrian cement kilns. Figure 7 shows this development 

in detail, not based on the mass of RDF, but on its energy content. Finally, TSR of  

76 percent in 2015 has been reached. 




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