System Schematic - ABB CEMcaptain GAA610-M Operating Instruction

12 GAA610-M ADVANCED EMISSION GAS MONITORING SYSTEM | OI/GAA610-M-EN REV. B
... 2 Design and function
... System structure

System schematic

A Exhaust gas stream
B Compressed instrument air inlet
C Calibration gas inlet
1 Exhaust pipe
2 Heated sample probe with probe tube and filter unit
3 Backpurging solenoid valves
4 Backpurging air panel
5 Heated sample gas line
6 Sample gas solenoid valve
7 Sample gas cooler SCC-C
Figure 2: System schematic
Sample gas flow
The sample gas is extracted from the exhaust duct after the
scrubber by a heated sample probe.
The heated sample gas line is the connection and supplying line
between sample probe and analyzer cabinet. The probe and the
sample gas line are heated to avoid condensation.
To clean the filters in the sample probe a back-purging system
via the filter chamber can be integrated. The filters are cleaned
with pressurized air every 12 hours cyclically or automatically
when the flow is below the minimum value.
At the entrance of the analyzer cabinet there is a 3/2-way
solenoid valve. The gas flow goes to the gas cooler and via filter,
flow meter, pump and aqua stop filter to the gas analyzer.
See also Piping diagram on page 98.
D Ambient air / zero gas inlet
E Sample gas outlet
F Condensate outlet
8 Oil/Soot removal filter
9 Sample gas feed unit SCC-F
0 Aqua stop filter
k AO2020 gas analyzer with Uras26
l Cooling unit for analyzer cabinet
m 10 l condensate bottle with condensate alarm switch
Sample probe
The sample probe is connected gas tight to the process with a
flange. The probe tube extracts the gas in the middle of the
exhaust duct.
An external heated filter separates the dust from the sample
gas. The Filter is heated by a self-limiting PTC heater to 180 °C
(356 °F). The filter is equipped with a ceramic filter element.
To clean the filters in the sample probe a back purging system
via the filter can be integrated.