1. Application of zirconia oxygen analyzer

YTZO series zirconia oxygen analyzer can perform fast and accurate online detection and analysis of the flue gas content generated by boilers, kilns, heating furnaces and other combustion equipment during the combustion process, so as to realize low-oxygen combustion control and achieve the purpose of energy saving. reduce environmental pollution.

YTZO series zirconia oxygen analyzer consists of zirconia head (primary instrument) and oxygen transmitter (secondary instrument).

YTZO type zirconia probe shell is made of high temperature and corrosion resistant stainless steel material. No need to add air, the reference air can convect by itself. It is also equipped with a standard gas interface, which can be calibrated and calibrated with standard gas during on-site operation. The zirconium tube of the probe can be easily disassembled and replaced.

YTZO type oxygen transmitter has simple structure, standardized installation size, reasonable circuit design, good process quality, stable and reliable instrument performance, and convenient debugging.

YTZO series zirconia oxygen analyzers have been widely used in domestic large and medium-sized power plants for several years due to their superior cost performance.

2. Technical Specifications of Zirconia Oxygen Analyzer

Measurement object: various industrial furnace flue gas, mixed gas concentration Measuring element: zirconia tube

1. Oxygen measurement range: 0-20.6%O2 or 0--10%

2. Instrument accuracy: system oxygen measurement error ≤±2% of full scale value

3. Transmitter accuracy: Class 1.0 (≤1.0% full scale value)

4. Temperature control accuracy: 700±1℃ of constant temperature point

5. Response time: ≤3 seconds (reaching 90% response)

6. Alarm output: upper and lower limit node output, optional "normally open" or "normally closed" point

7. Analog output signal: 4—20 mA ADC (load 0Ω—750Ω) corresponding to oxygen 0—10%O2 or 0—20.6%O2

8. Background correction range: -20 mV—+20 mV

9. Digital display form: LED four-digit digital tube display

10. Power supply: AC220V±15%

11. Power consumption: ‹6W (excluding heating power)

12. Heating power: about 50W (average) can provide 150W output power

13. Environmental conditions: temperature -20°C—60°C; relative humidity ‹90%

14. The detector is about 10Kg, and the converter is about 5Kg

15. Calibration method: three-parameter calibration. Air point, standard gas point, working point.

How to choose

The following aspects are mainly considered for selection:

1. Converter

The converter is mounted on a disk (HD-2D): hole size 75+2mm×150+2mm

Wall-mounted (HD-2C): Installation Dimensions: 260mm×205mm×90mm

The display range of the converter is: 0-20.6% or 0-10%.

The output is: 4-20mA

The upper and lower limits are normally open nodes, and the user can set the alarm point by himself.

2. Detector

(1) Selection of insertion depth: furnace wall thickness + 300mm (the detector length specifications are available in 400mm, 600mm, 800mm, 1000mm, 1200mm) (2) Selection of flue gas temperature at installation point: flue gas temperature ‹700°C, choose SK Standard detector; smoke temperature ≥ 700℃, choose TX high temperature detector

Third, the zirconia oxygen analyzer has the following main characteristics:

1. The sensor uses Japanese ion coating technology, which greatly improves the service life.

2. The zirconia probe adopts full 321 stainless steel (1Cr18Ni9Ti) sheath, which has wear resistance and corrosion resistance.

3. In-line type: no sampling system, fast response, effectively reduce ash blockage in flue gas.

4. Thermal diffusion reference: no special reference air pump is required, and the use and maintenance are simple.

5. Dual-parameter design: Overcome the discrete performance of domestic zirconia, accurate measurement and prolong service life.

6. Online calibration of working conditions: accurate and reliable, online calibration of single standard gas is convenient, working point can be directly calibrated, and the measurement is accurate.

7. Thermal inertia protection: easy to install, can be installed hot, and has strong adaptability to stopping and starting the furnace.

8. The components are removable: the components are easy to replace, easy to maintain, and reduce the cost of use.

9. Multi-function display: oxygen content (%); oxygen potential; temperature, background potential parameters digital display is intuitive and convenient

10. Dual range: It has 0-10% and 0-20.6% dual range at the same time, and the measurement range is wide.

11. Dual output: It has switch node output and 4-20mA two-speed output at the same time.

12. Large load: 750 ohms/4-20mA, which is convenient for remote installation.

13. The background potential is adjustable, the adjustment range is wide, and the parameters such as component aging can be checked at any time.

14. Full floating design: common mode input, strong resistance to electric field interference, no need for special ground wire, easy installation.

15. Strong adaptability: it can be applied to various furnace types of gas, oil and coal. Suitable models can be selected for measuring temperature from room temperature to 1400 degrees.

1. Working principle of zirconia analyzer

Fully stabilized zirconia ceramics is a solid dielectric, which has ionic conductivity at a certain temperature, and is a key component in the measurement device to convert the oxygen concentration of flue gas into electrical signals. At a certain temperature, when the oxygen concentrations on the inside and outside of the zirconia tube are different, an oxygen concentration difference potential will be generated on the inside and outside of the zirconia tube, and the two leads on the zirconium tube will send the oxygen concentration potential to the secondary instrument for processing. Calculate and display the oxygen level.

2. Main components of zirconia analyzer

Dust filter, zirconia tube element (zirconia solid electrolyte), protection tube, thermocouple, heating furnace, standard gas to gas pipe, junction box and other main components.

3. Basic conditions for normal work

 1. The zirconia element needs to be heated to 700°C and kept at a constant temperature of 700°C.

2. The flue gas temperature at the installation point of the zirconia analyzer should be lower than 700℃.

3. The output voltage of the analyzer should match the resistance value of the heating wire. (Can heat the electric furnace to 700℃)

4. Ordering instructions

※Before ordering, you need to ask the customer about the industry of zirconia, its use and whether there are special requirements for zirconia. Use industries: 1. Conventional power plants 2. Sulfuric acid plants and chemical plants 3. Municipal waste incineration power plants (burning garbage, straw, etc.).

2.3 These two industries have higher requirements on the quality of the instruments because of their high corrosiveness and harsh environment. Conventional zirconia cannot meet the requirements. Therefore, according to their characteristics, the special zirconia for sulfuric acid plants and the special oxidation for waste power plants are withdrawn. zirconium. The price of special zirconia is much higher than that of ordinary zirconia.