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| Industry | : Power | | Product | : Zirconia Oxygen Analyzer (ZR22G Detector, ZR402G Converter) |
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Package boilers require less fuel and electric power to operate
and are widely used in the pharmaceutical, food, ceramic, and
other industries. A package boiler operates more efficiently if the
oxygen concentration in the flue gas is reduced. On the other
hand, insufficient air intake causes incomplete combustion,
resulting in increased smoke emission. Optimizing air intake for
boiler operation requires continuous measurement of the oxygen
concentration in the flue gas.
The typical package boiler is a water tube boiler or flue and
smoke tube boiler with a capacity of 5 to 20 t/h (average steam
generation capacity). The most widely used fuels are heavy oil,
light oil, and gas.
The ZR22/ZR402 zirconia oxygen analyzer is ideally suited
for package boilers thanks to its long service life and low
maintenance, and is an effective tool for the reduction of fuel
and electric power consumption. |
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Increases combustion efficiency of package boilers |
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Stable, continuous measurement |
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Reduces operating cost |
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Keeps the initial cost of equipment replacement to a minimum |
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| Process Conditions |
| Measuring point: |
Boiler outlet, economizer outlet |
| Temperature: |
150 to 300 °C |
| Flow Velocity: |
15 m/s max. |
| Pressure: |
±0.5 kPa |
| Dust: |
1 g/Nm3 max. |
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| Effectiveness in Saving Energy |
| A 1% reduction in excess oxygen of flue gas realizes a 0.8% saving in fuel. |
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| Measurement system |
| Detector: |
ZR22G-☐☐☐-S-☐-☐-☐-☐-E-A |
| Converter: |
ZR402G-☐-E-E-A |
| Flow setting unit: |
ZA8F-☐*B |
| Options: |
Dust guard protector: P/N K9471UC |
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| Utilities |
| Power supply: |
85 to 264 V AC, 50/60 Hz |
| Instrument air (reference gas): |
Pressure; 300 to 700 kPa |
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| Notes on Installation
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The detector should be mounted 2 to 3 m away from the boiler
outlet. |
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Typical good/bad installation examples are shown in Figure 1. |
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Figure 1 Instructions for Installation
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| Special Notes |
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The ZR22G/402G zirconia oxygen analyzer can also be used in bagasse- or bark-fired boilers under general conditions. |
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Use of VVVF control can yield further reductions in fuel and electric power consumption. This can be done by combining the zirconia
oxygen analyzer with a VVVF inverter and a programmable controller. |
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Download printer-friendly version (1MB)
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Measurement of Oxygen Concentration
in Package Boiler Flue Gases |
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