Zro2-ii Zirconia oxygen analyzer is a modern instrument, suitable for all kinds of industrial boilers, kilns and heating furnace flue gas oxygen content measurement. Zro2-ii type direct plug oxygen analyzer has high sensitivity, excellent performance and stability performance, automatic switching, fast response, wide range and continuous online measurement characteristics, can achieve low oxygen combustion control, energy saving, reduce environmental pollution, improve environmental quality.
Zro2-ii Zirconia oxygen analyzer principle:
1, according to the concentration cell principle, like other cells, it has two and a half cells, and between the two electrodes, with solid dielectric zirconia connection.
2. At high temperature, when the oxygen concentration difference on both sides of zirconia is formed, the oxygen concentration battery is formed. The electromotive force of the battery can be calculated according to the Nernst formula, that is:
Where: e-concentration battery output, mV; N - number of electron transfers, in this case 4;
R- Ideal gas constant, 9.314 W*S/mol; F- Faraday constant,96500 C;
T - temperature, K; P"Q- High concentration side oxygen partial pressure; P 'q - Partial pressure of low concentration side oxygen.
When the battery working temperature is fixed at 700℃, the formula above is:
According to the above formula, when the temperature is 700℃, when the oxygen partial pressure on the side of the solid dielectric is air (20.6%), the concentration battery output electromotive force E, you can calculate the oxygen partial pressure on the side of the solid dielectric, which is the oxygen measuring principle of the zirconia oxygen automatic analyzer.
Zro2-ii type direct plug zirconia oxygen analyzer oxygen measurement stability and reliability, prolong service life, improve the ability of self-diagnosis and anti-interference. The instrument has made obvious improvements in the following aspects:
1. The signal has the necessary self-diagnosis function.
2, with a variety of linear range options.
3. The temperature rise curve given by the instrument temperature control system can meet the requirements of the temperature rise rate of zirconia material.
4, porous platinum electrode chemical formula and production process can ensure that oxygen detector zirconia probe in boiler smoke atmosphere has enough service life.
Zro2-ii Zirconia oxygen analyzer operating conditions:
1. The installation site of oxygen detector must meet the following conditions:
Have enough work space;
The instrument avoids vibration occasions;
The flue gas temperature and pressure shall be within the range specified by the instrument. (Flue gas temperature < 650℃)
2, signal converter needs to meet the conditions:
Ambient temperature: 0-50℃
Working environment temperature: ≤90%
Supply voltage: 220V.AC±10%Hz
Power consumption: 150W
No flammable, explosive and corrosive gases, and good ventilation is required.
Zro2-ii Zirconia oxygen analyzer technical parameters:
Length of detector: 0.2m, 0.4m, 0.8m, 1.0m, 1.2m, 1.4m (can be customized according to requirements);
Measurement range: 0~25.0%;
Measurement accuracy: 3%;
Temperature accuracy: 700±1℃;
Output signal: 0-10mA or 4-20mA;
Response time: ≤5S (90% measured value);
Load resistance: 0-800 ω (4-20mA output), 0-1.6K ω (0-10mA output);
Display: oxygen concentration (), oxygen potential (mV), furnace temperature (℃), heating voltage (V), upper and lower range (), upper and lower limit alarm ().
Keyboard setting: alarm upper and lower limit setting, probe zero potential correction.
Self-diagnosis contents and fault type symbols: E-0 oxygen upper limit, E-1 oxygen lower limit, E-2 abnormal temperature (high), E-3 abnormal temperature (low), E-4 abnormal temperature (fast), E-5 abnormal temperature (stop), E-6 abnormal oxygen potential E-7 broken couple.
