Introduction
The reduction of gas emissions by industrial plants is now
a global concern for the environment as climate change, forest
devastation and respiratory diseases are endangering present
and future generations.
The aim of Awa Instruments is to provide worldwide reliable
and cost effective environmental monitoring solutions to control
emission gases.
With a 10-years experience on ammonia gas detection by UV
spectroscopy and hundreds of on-line analyzers installed,
we now extend our technology to a wide range of UV absorbing
gases.
Key factors for successful on-line analysis as stability,
low maintenance and low operating cost have oriented our design
to the DOAS method (Differential Optical Absorbance Spectroscopy)
based on the Beer Lambert law. No sampling system is needed
reducing the maintenance and installation costs. An air purge
circuit maintains clean the optics.
Typical applications are SCR and SNCR processes where simultaneous
measurement of NO, NO2 and NH3 is necessary to control the
DENOx process, as well as other chemical processes.
Multi-gas system based on proprietary FFT-UV algorithms
Based on the recognition of the specific UV spectrum of gases
by proprietary algorithms using Fast Fourier Transform, the
system can detect with a high selectivity and simultaneously
up to 8 gases on a complex gas matrix.
High flux direct light coupling
Using a direct light coupling without optical fiber, the high
flux of light enable the measurements with a high level of
dust inside the stack. The distance between the stack and
the controller is not limited as with optical fiber systems.
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Second assembly by clamp
The use of clamp enables a second assembly/disassembly
of the emitter and receiver for checking or recalibration
procedures. The emitter and receiver can be easily transferred
on a special calibration tube for zero checking or a specific
gas calibration.
10-years lamp lifetime
The UV xenon lamp is specified for 1,000,000,000 flashes that
give more than 10 years of lifetime with continuous measurements.
This reduces significantly the maintenance and the risk of
wrong measurement due to age lamps or due to the replacement
itself.
2-wires RS485 link over long distance
A 2-wires inexpensive RS485 link is used
to connect the receiver on the stack to the analyser located
in the control room. Distance over hundreds of meters can
be achieved in an electrically noisy environment.
No risk of interference with CO, CO2, H2O
The major emission
gases like CO, CO2 and H2O do not have UV absorption, and
so will never interfere with the measured gases at the opposite
of FT-IR based systems.
Advantages:
- Cost-effective FT-UV DOAS Technology
- In-situ cross stack measurement for low maintenance
- No risk of interference with H2O, CO, CO2 at the opposite of FT-IR
- 10-years lamp lifetime
Applications:
- Power Plants
- Waste Incinerators
- Chemical Industry
- Cement Industry
- Mineral wool Industry
- Fertilizer Industry
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Call Us: 631-756-9116 