Pulverized Coal Boiler - YOKOGAWA EXAxt ZR22G Technical Information

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Pulverized coal boiler

These are almost always large facilities such as power generation boilers; the zirconia oxygen
analyzer is used for combustion monitoring and combustion control. Since the exhaust gas
entrains a rather large amount of ash dust, a detector with dust protector will be used.
Sample point
Economizer outlet
(economizer, feedwater
afterheater)
Drum
Fuel
Dust Flow Direction
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System type
(detector with probe
protector)
Steam
Superheater
Exhaust
Boiler Main
Unit
Ash
Abrasion Due to Dust
Probe Pipe
Probe Protector
Detector
L2, L3
Dust Guard
Horizontal Superheater
Economizer
Air
Heater
Gas
High Density Dust
Ash
Centrifugal Force
<4. Applications>
Objective
Combustion monitoring
D4
O
2
Electric
Precipitator
: Optimum mounting position
: Second best mounting position
Pulverized coal boiler
Gas temperature: 300 to 400°C
Gas pressure: –1.5 to +1.5 kPa
Dust: Approximately 15 g/Nm
Fuel: Pulverized coal
TI 11M12A01-01E
4-3
control
3
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Mar. 14, 2017-00