Emerson HASXEDE-IM-EX Welding Consumables User Manual


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Emerson Process Management GmbH & Co. OHG 1-19
1
Techn. Description
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
03/2012
1.9 Vapor Recovery Application
1.9 Vapor Recovery Application (Simultaneous Measurement of CH
4
and Non-CH
4
)
This application is served by a special con-
guration of the X-STREAM XEFD ameproof
analyzer.
EXPLOSION HAZARD BY HOT COMPONENTS
Temperatures inside an analyzer for VAPOR RECOVERY applications exceed
the analyzer‘s temperature classication for hazardous areas!
Special conditions apply to handling this analyzer, consider the safety
instructions at the beginning of this manual and the special conditions for
safe use
(
1-5 )!
Consider the waiting time statement on the front door label before opening!
FA1: Analyzer‘s inlet ame arrestor
FA2...3: Analyzer‘s outlet ame arrestors
F1: Filter
T1: Throttle
V1: Valve
The conguration consists of a dual channel
IR measurement, connected to the inlet and
outlet of a converter. This converter is instal-
led inside the X-STREAM analyzer and is
heated to about 280 °C (536 °F).
Fig. 1-7: Vapor Recovery Gas Flow Diagram
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Converter
CH2: non-CH
4
CH1: CH
4
Principle of measurement
The sample gas is taken towards a converter.
At it‘s inlet the gas stream is divided into two:
one is directly fed to a non-CH
4
measurement.
The other is supplied to a solenoid valve,
normally forwarding the gas to the converter.
Within the converter, hydrocarbons higher
than CH
4
are converted into H
2
O and CO
2
.
The converter outlet is connected to a second
IR measurement system, analyzing the re-
maing amount of hydrocarbons (mainly CH
4
)
in the sample gas.
After switching power on, wait
about 50 min. for the converter
to reach its operating tempera-
ture before applying gases!
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