What type of remote-transmission flow meter with low pressure resistance is used for measuring the hot flue gas flow rate in boilers at 600℃?
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What type of remote transmittance flow meter should be used to measure the flow rate of hot flue gas at 600°C coming from the outlet of a high-temperature fan, one that generates low resistance (less than 300 Pa)?
A target type or pitot tube, or maybe an ultrasonic flow meter
Can a thermal mass flow meter be used instead?
Both pitot tubes and venturi tubes (Anubas) can be used； Flute tubes are easy to align accurately, but it’s troublesome when they get blocked ； The pitot tube, when equipped with a backflow device, is more durable; the downside is that it requires a precise installation location, as it must be aligned with the representative measurement point.
Target-type flowmeters are suitable; others are not very effective
The standards allow the use of three types: differential pressure type, ultrasonic type, and thermal type. Use differential pressure types; they are technically mature and offer good cost-performance.
To measure flue gas, use differential pressure transmitters such as Pitot tube or Wilo type; the value should be less than 300 Pa but greater than 100 Pa
This post was last edited by leit on 2018-12-10 17:01. It’s not possible; the reason is as follows: 1. The smoke ducts are quite large, at least 500mm in diameter. What kind of investment is required to produce one with such a large caliber (insertion types are also available)? At 2,600 degrees Celsius, thermal flowmeters cannot operate properly at such temperatures. (Basically limited to 300 degrees) 3: The most important point is that it simply can’t be used in principle. The composition of flue gas is complex and can change. The thermal type is suitable for measuring gases with relatively stable compositions.