ABB SCC-K, Руководство оператора

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42/23-52 EN Rev. 2 SCC-K NO
2
/ NO Converter Operator’s Manual 17
Annex
Description
Legal Requirements In combustion processes – such as, for example, in large furnaces – in which the
nitrogen dioxide content amount to more than 5 % of the nitrogen oxide emission,
continuous measurement of total nitrogen oxide NOx consisting of nitrogen
monoxide NO and nitrogen dioxide NO
2
is prescribed by law in Germany.
Functional Principle The SCC-K NO
2
/ NO Converter converts the NO
2
content of the sample gas by
catalysis into NO (see also section “Conversion Principle”, page 19). To do this the
sample gas is conducted through a special stainless steel cartridge with a
catalyst-filling based on carbon-molybdenum. This conversion makes it possible
to measure nitrogen oxides indirectly using all commercially available NO-selective
measurement instruments.
Construction The converter is designed as compact, user-friendly and easy to service 19-inch
plug-in unit for mounting in 19-inch cabinet systems or with a mounting bracket
for wall-mounting (see also section “Converter Construction”, page 20).
Catalyst Cartridge The catalyst is filled and formatted at the works and is ready for use immediately.
The ability to select the appropriate catalyst filling and the possibility of adjusting
the cartridge temperature optimally to the catalytic reaction by way of an electro-
nic temperature controller means that the converter can be used in a wide range
of applications.