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Product Description:
The HVZR-508AL series high-temperature zirconia oxygen analyzer is the earliest intelligent oxygen content analyzer developed by our company. It has the characteristics of high sensitivity, good reproducibility and stability, wide range, automatic switching, fast response, and continuous online measurement. It can be used in conjunction with various electric unit instruments, conventional display recorders, and DCS distributed control systems. It can quickly and accurately display, detect, and analyze the oxygen content in the flue gas generated by combustion equipment such as boilers, kilns, and heating furnaces during the combustion process, in order to achieve low oxygen combustion control, energy conservation, and reduce environmental pollution. It can be widely used in industries such as metallurgy, electronics, petrochemicals, chemical fibers, glass, building materials, magnetic materials, and oxygen production. It is an ideal equipment for process control and product testing. working principle:
The high-temperature zirconia oxygen analyzer is composed of an oxygen concentration difference electromotive force, which is converted by the detection instrument into a standard voltage signal that is linearly related to the oxygen content of the measured gas. It is input to the input terminal of the digital instrument, and then converted to the CPU of the instrument through A/D conversion. After calculation, it is transmitted to the instrument to display the oxygen content and the temperature value, and outputs corresponding pulse control signals to control the temperature value, or 4-20mA analog signals, for use by other control systems. The instrument is equipped with oxygen content and temperature alarm indicators, and is accompanied by external alarm relays. The instrument adopts reliable switching power supply, cold end compensation adopts three wire Pt100, low drift operational amplifier, high-resolution A/D conversion, LED high brightness, dual row digital display, PID temperature self-tuning control, with 4-20mA or RS232/485 communication interface.
Features:
1. The zirconia oxygen analyzer consists of two parts: zirconia probe and oxygen transmitter. 2. The probe is made of corrosion-resistant alloy material, and zirconia is easy to disassemble and replace without the need for an external gas pump. The reference gas flows naturally and is equipped with a standard gas interface for background and preset standard gas testing. According to user needs, protective sleeves can also be added.
3. The instrument software has complete functions, all panel operations, simple wiring, circuit integration, reliable performance, easy debugging, and the meter performance is at the leading level in China.
Technical Specifications:
1. Range: 0-20.6% O2
2、 仪表精度: ≤0.5%F.S
3. Temperature display range: 0~1300 ℃
4. Measurement temperature: 0~600 ℃ (low temperature type), 0~800 ℃ (medium temperature type), 0~1300 ℃ (high temperature type)
5、 本底修正： －20mV～+20mV
6. Output signal: 4-20mADC or 1-5V
7. Environmental conditions: 0-50 ℃, relative humidity<90%
8. Power supply: 220VAC 50Hz
9. Heating time of detector heating furnace: about 20 minutes
10. Heating temperature: PID self-tuning control ≤± 1 ℃ (constant temperature point can be set arbitrarily)
11. Response time: Approximately 3 seconds (90% response)
12. Display format: LED four digit digital tube dual row display; LCD (Liquid Crystal Display)
13. Communication interface: RS232 or RS485
Specifications and appearance:
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Appearance
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Dimensions mm
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Hole size mm (height x width)
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Plate mounted horizontal (H)
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160×80×110
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152+1×76+1
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Plate mounted vertical (S)
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80×160×110
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76+1×152+1
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Wall mounted (G)
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220 × 170 × 75 (height × width × thickness)
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Installation method:
1. The selection of installation points should meet the relevant requirements for the flue gas temperature. Generally speaking, low flue gas temperature results in a long service life of the detector, while high flue gas temperature results in a short service life. The detector cannot be installed in blind spots where smoke does not flow, nor in places where smoke flows quickly (such as expansion chambers in some bypass airways). In addition, it is required that the flue gas leakage is small and the detector is easy to install and maintain. For medium and small boilers, it is recommended to install it before the economizer and after the superheater, because the flow direction of the boiler system flue gas from the furnace to the steam drum, passes through the superheater, economizer, and air preheater, and is recovered and treated by the induced draft fan before being discharged from the chimney. If the measuring point is too close to the outlet of the flue gas furnace, due to high temperature and fast flow rate, it will cause erosion and corrosion to the stainless steel shell of the detector, reducing its service life; If the measuring point is too biased, due to gas leakage in the flue system, the oxygen content value at the measuring point will be too high, which cannot accurately reflect the oxygen content of the flue gas in the furnace.
2. The fixed flange of the detector on the furnace wall is made of steel as a transition frame. The flange of the transition frame can be directly welded to the furnace wall or buried in the furnace wall, but it is required to be airtight and firm. The flange on the other end of the transition frame is designed to fix the detector, so it must match the screw hole of the fixed flange of the detector. If a 12mm mounting hole is selected, evenly distribute four 12mm mounting holes on the ￠ 130mm circle of the transition frame flange, use four M1O × 40 screws, and fasten it to the fixed flange of the detector. To prevent air leakage, a rubber cardboard sealing ring can be filled between the two flanges.
3. The installation of the detector relies on natural convection of air to provide the reference gas. The detector needs to be installed horizontally, with the reference gas and standard gas interfaces facing downwards. Rubber cardboard must be filled between the installation flange of the detector and the transition frame flange to prevent air from leaking into the flue and affecting measurement accuracy. The detector end must be at least 150mm away from the inner wall of the boiler, so that the exposed porous ceramic part of the filter faces away from the flow direction of the flue gas (the direction of the filter can be rotated separately) to avoid the ceramic body being washed away by gas and extend its service life. When the detector is pushed into the hot flue, to prevent the zirconium tube from bursting, it is advisable to gradually push it in sections, generally at a rate of 10-20 centimeters per minute.
4. The wiring between sensors and secondary instruments or transmitters consists of six wires, including zirconia, thermocouples, and heating furnaces, all of which can be made of 0.75mm2 plastic insulated wires.
Product selection:
1. The selection of zirconia oxygen analyzer is as follows:
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HVZR-508AL series zirconia oxygen analyzer
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code
TL
TM
TH
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Heating form of probe
Low temperature type
Medium temperature type
high-temperature type
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code
BH
BS
BG
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Oxygen transmitter model
Plate mounted horizontal
Plate mounted vertical
wall-mounted
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code
1
2
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Material of probe outer protective tube
Conventional anti-corrosion alloy
Special anti-corrosion alloy
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code
1
2
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output signal
4～20mA
1～5V
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Probe length
L : 400～1800mm 任选
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2. The product selection demonstration is as follows:
HVZR-508Al -TM-BH-1-1 L=800mm, Medium temperature type, disc mounted horizontal oxygen transmitter, conventional anti-corrosion alloy, 4-20mA output, probe length 800mm.
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