10
INZ-TN2ZRE-E
The following illustrates a typical system conguration for ve component gas measurement for
monitoring combustion exhaust gas from boiler, refuse incinerator, etc.
Contact Fuji Electric for system conguration matching the particular use or further information.
(1) Gas extractor
15
Drain
Exhaust
2-way
solenoid
valve
Air
ZERO NO SO
2 CO O2CO2
NO
/N
2
SO2
/N2
CO2
/N2
CO
/N
2
O2
/N2
Infrared gas
analyzer
main frame (O
2)
ZRE unit
or larger
(10)
Zirconia
O
2 senor
φ10/φ8
Teflon
tube
(ZFK7)
(2) Mist filter
(3) Safety
drain
trap
(4) Gas aspirator
Electronic
gas cooler
(5)
(8) Flowmeter
(7) Membrane
filter
(11) NO
2/NO
converter
(6)
Solenoid
valve
Pressure
reducing valve
(9) Standard gas
Pressure at the sampling gas outlet should be adjusted to the atmospheric pressure.
Name Description Name Description
(1) Gas extractor Gas extractor with a heating
type stainless steel lter of
standard mesh 40µm
(8) Flowmeter Adjusts and monitors the ow
rate of the sample gas.
(2)
Mist lter
Removes drain, mist, and dust. (9) Standard gas Reference gas used for cali-
brating zero and span of the
analyzer, depending on the
measured gas.
(3) Safety drain trap The safety drain trap is divided
into two rooms for positive and
negative pressure. It moni-
tors and adjusts the sample gas
pressure.
(4) Gas aspirator For aspiration of the sample gas (10) Zirconia O
2
sensor
External zirconia oxygen
sensor used for measuring
the oxygen concentration in
sample gas.
(This is not necessary in case
when O
2
sensor is built-in.)
(5) Electronic gas
cooler
Dries the moisture in the
sample gas to a dew point of
approx. 2˚C.
(6)
Solenoid valve
Used for introducing the cali-
bration gas.
(7) Membrane lter PTFE lter used to eliminate
ne dust particles.
(11) NO
2
/NO con-
verter
Added to NOx analyzer.
A special catalyst material for
efcient conversion of NO
2
gas to NO is used.
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