Non-Combustion Applications; A) Oxygen Enrichment Facility - YOKOGAWA ZR22G Technical Information

<Toc> <Ind>
4.6

Non-Combustion Applications

a) 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 efficiency. 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%).
Oxygen supply line
Oxygen compressor outlet
Air-oxygen mixing line
Note 1: Measurement will be done using a sampling system, since all the points are at high pressure.
Air
Blast Furnace
Air Compressor
All Rights Reserved. Copyright © 2004, Yokogawa Electric Corporation
Sample point
75 to 100%O
2
20 kPa
490 kPa
Blast Furnace Oxygen Enrichment Example
System type
H3 (Note 1)
H3 (Note 1)
75 to 100%O
2
Oxygen Gas
Compressor
490 to 780 kPa
Oxygen
Generation Unit
(Air Separation
Unit)
Air
Note 1: Due to the high pressure, measurement will
4. Applications
Detector
Note 1 Operational monitoring
Note 1 Operational monitoring
Intake Tower
Hot Blast Stove
Blast Furnace
Blower
420 kPa
0 to 50%O
2
be done with a sampling type system.
Regulator Valve
or Needle Valve
TI 11M12A01-01E
4-15
Objective
T0415.EPS
F0415.EPS
May 31, 2004-00