YOKOGAWA EXAxt ZR22G User Manual

<4. Applications>
4-3
TI 11M12A01-01E
Mar. 14, 2017-00All Right Reserved Copyright © 2004, Yokogawa Electric Corporation
(3) 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 System type Detector Objective
Economizer outlet
(economizer, feedwater
afterheater)
L2, L3
(detector with probe
protector)
D4
Combustion monitoring
O
2
control
F0403.ai
Ash
Steam
Boiler Main
Unit
Exhaust
Gas
Drum
Fuel
Superheater
Dust Guard
Horizontal Superheater
Abrasion Due to Dust
Probe Pipe
Probe Protector
Economizer
Air
Heater
Electric
Precipitator
Pulverized coal boiler
Gas temperature: 300 to 400°C
Gas pressure: –1.5 to +1.5 kPa
Dust: Approximately 15 g/Nm
3
Fuel: Pulverized coal
Ash
Centrifugal Force
High Density Dust
Dust Flow Direction
: Optimum mounting position
: Second best mounting position

YOKOGAWA EXAxt ZR22G Specifications

General

Brand	YOKOGAWA
Model	EXAxt ZR22G
Category	Measuring Instruments
Language	English