SO - Rheinkalk
SO - Rheinkalk
SO - Rheinkalk
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In the next picture operating results from different municipal waste incineration plants<br />
are compared. By the use of the two-stage-process (MCD) it is possible to reduce not<br />
only the lime consumption between 30 – 50 % but the residue as well. The<br />
application of such a process allows very flexible operation of a flue gas cleaning<br />
system. Even peaks on the raw gas side are controllable.<br />
spec. consumption [kg/t]<br />
40<br />
35<br />
30<br />
25<br />
20<br />
15<br />
10<br />
5<br />
0<br />
MWI I (MKT)<br />
MWI II (MKT)<br />
MWI III (MKT)<br />
MWI IV<br />
MWI V<br />
→ MCD Process: Specific consumption ca. 18 - 22 kg/t waste<br />
spec. consump.<br />
Spongiacal<br />
spec. consump. HL<br />
(lime based)<br />
→ One Stage Spray Dry Sorption: Specific consumption ca. 28 - 35 kg/t waste<br />
Graph 9: Comparison of operational results<br />
Conclusions<br />
• Even in the temperature ranges previously regarded as being unfavourable for<br />
the use of hydrated lime, the removal of acid-forming pollutants, such as HCl<br />
and <strong>SO</strong>2, by means of a highly reactive additive tailored to the application case,<br />
was highly effective.<br />
• The limiting values of the 17th BImSchV were observed.<br />
• In works trials, it was proved that the use of Spongiacal ® gave reductions of<br />
more than a half in the consumption of operating materials.<br />
• This gave corresponding reductions in the amount of residual waste.<br />
• According to currently available operating experience, the use of Spongiacal ® in<br />
a MWI with a single or two-stage dry sorption plant can safely comply with the<br />
limiting values for <strong>SO</strong>2 and HCl specified in the 17th BImSchV. It is<br />
advantageous to use these products in a mixture with a carbon component for<br />
the removal of ecotoxic pollutants. This means that complicated flue-gas<br />
cleaning processes are not necessary. It also ensures an economically viable<br />
operation on a long-term basis with low expenditures of personnel, equipment<br />
and materials.<br />
• If high contents in the raw gas occur frequently, the use of the MCD process<br />
with its high effectiveness and low consumption of additives allows compliance<br />
with mandatory limiting values, even under conditions that were previously<br />
considered to be unfavourable. Moreover, this process allows operation with low<br />
expenditures of personnel, equipment and materials.<br />
8
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