YOKOGAWA EXAxt ZR22G User Manual

<4. Applications>
4-15
TI 11M12A01-01E
Mar. 14, 2017-00All Right Reserved Copyright © 2004, Yokogawa Electric Corporation
4.6 Non-Combustion Applications
(1) Oxygen enrichment facility
Although in most combustion systems air is used as-is, there are cases such as in blast furnaces
insteelplantswheretheairwillbeenrichedwithoxygengastoraiseefciency.Whenthisis
done, oxygen analyzers are used to monitor the oxygen generation unit (air separator, etc.),
and/ or to check the condition of the mixing with the air in later process stages. In these cases,
the oxygen analyzer will be measuring values higher than the concentration of oxygen in the air
(approximately 21%).
Sample point System type Detector Objective
Oxygen supply line
Oxygen compressor outlet
H3 (Note 1) Note 2 Operational monitoring
Air-oxygen mixing line H3 (Note 1) Note 2 Operational monitoring
Note 1: Measurement will be done using a sampling system, since all the points are at high pressure.
Note 2: The high-temperature detector should be used.
F0415.ai
Air
Intake Tower
Air Compressor
490 kPa
20 kPa
75 to 100%O
2
75 to 100%O
2
420 kPa
Reducing Valve
or Needle Valve
Note 1: Due to the high pressure, measurement will
be done with a sampling type system.
0 to 50%O
2
Air
Blast Furnace
Blower
Oxygen
Generation Unit
(Air Separation
Unit)
Blast Furnace Oxygen Enrichment Example
490 to 780 kPa
Blast Furnace
Hot Blast Stove
Oxygen Gas
Compressor

YOKOGAWA EXAxt ZR22G Specifications

General

Brand	YOKOGAWA
Model	EXAxt ZR22G
Category	Measuring Instruments
Language	English