Wireless Flexibility - Siemens

Strengthened by the high quality and reliability
of its products, Siemens has chosen to
propose the best and most suitable technology
for each application instead of having a multicomponents
system with a global average result.
All Siemens analyzers are compliant with the latest
regulations in Europe, Asia and US (TUV, QAL1...etc).
Furthermore, in order to bring a complete solution
to its customer, Siemens is able to propose the
system integration (sampling and conditioning system,
shelter), maintenance and service contract
through its own local or regional office and partners
network.
Non Dispersive Infra-Red (NDIR) Analyzer
Since all gases absorb infrared light energy of various
wavelengths, multiple gas mixtures, even with
very complicated absorption spectra, can be accurately
quantified using this technique. Siemens developed
an original and efficient design by using double
or triple layer detectors filled with the measuring
component. One broad bandwidth IR source is used
for all components and the selection is realized inside
the detector with no moving part.
The Ultramat 23, by using this specific technique,
allows to measure up to three IR components simultaneously
with the option of an additional electrochemical
cell for O2 measurement. Measured components
are CO, NO(x), SO2, CO2 and O2.
For emission monitoring in large combustion plant
or incineration plant, the Ultramat 23 is the benchmark
solution.
Its main advantages are the use of cleanable sample
cell, of no moving part and the possibility to perform
a calibration with ambient air by using the so
called “AUTOCAL”. These key factors make the Ultramat
23 to have the lowest cost of ownership on the
market.
In-situ Laser spectroscopy
The basic principle of the diode laser absorption
spectroscopy is the use of a laser beam crossing a
stack. One of the characteristics of the laser is its monochromatic
feature and therefore emits only one
specific wavelength resulting in a low interferences
with other gases.
The laser beam being absorbed by the specific gas
molecules reaches the receiver with a lower intensity.
The Intensity absorbed by the molecule is then directly
proportional to the concentration of this molecule
in the gas volume. The LDS 6 is a single (or dual)
gas analyzer, which can simultaneously measure at 3
locations. From the central unit to the sensors, there
The LDS 6 in-situ laser spectrometer
is a robust optical fiber which can lengthen up to
1000m. An important difference with any other in
situ technology is the use of the second derivative
calculation of the signal which allows to be independent
of the transmission condition as opacity of the
stack, and water droplet.
Due to the very low concentration of HF and HCL to
be measured for the emission monitoring and their
high reactivity with their environment, the in situ Laser
LDS6 is the perfect solution. An extractive system,
because of the sampling line, will cause the loss
of these components. Therefore, the high selectivity
of the laser LDS6 and its high sensitivity allows
measurement of the HF, HCL and H2O.
The last important feature to remember is its quasi
inexistent maintenance due to the absence of consumable,
moving part and the permanent self calibration
by using a build-in reference gas cell.
A new WTE plant in Singapore
The future waste-to-energy plant and Singapore’s
fifth, is expected to be running in operations in early
2009. Siemens will provide the equipment - Ultramat
and LDS 6, for the continuous emission monitoring
system. When completed, the plant will be able
to treat 800 tones of solid waste a day to generate
more than 20MW of energy.
p
info
contact
www.siemens.com/processanalytics
frederic.thielland@siemens.com
Pictures: Siemens AG
ideas singapore | 2008 21