C) Pulverized Coal Boiler - YOKOGAWA ZR22G Technical Information

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c) Pulverized coal boiler

These are almost always large facilities such as power generation boilers; the O
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.
Economizer outlet
(economizer, feedwater
afterheater)
Drum
Fuel
All Rights Reserved. Copyright © 2004, Yokogawa Electric Corporation
Sample point
Steam
Superheater
Boiler Main
Unit
Ash
Dust Flow Direction
System type
L2, L3
(detector with probe
protector)
Dust Guard
Horizontal Superheater
Economizer
Exhaust
Gas
High Density Dust
Ash
Centrifugal Force
Abrasion Due to Dust
Probe Pipe
Probe Protector
4. Applications
Detector
Combustion monitoring
D4
Air Electric
Heater 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
analyzer is used
2
Objective
O control
2
T0403.EPS
3
F0403.EPS
May 31,2004-00