Are there any recommendations for detecting the flue gas flow at 700℃?
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Now, it’s necessary to measure the flue gas flow at the rear of the boiler at 700℃. Experts, please give me some advice! Pressure -200Pa, square pipe.
Our company has thermal gas mass flow meters for multi-point measurement in square tubes. Flue gas has many applications.
Currently, domestic thermal gas mass flow meters can withstand temperatures of up to 500 degrees. At such high temperatures and with relatively low pressures, target flow meters can be used, as can differential pressure flow meters; however, the issue of pressure loss must be taken into consideration
Why isn’t heat recovery implemented at such high temperatures? I made a mistake in my previous message when I said our flow meter would work; the temperature is 850°F, which is equivalent to 454°C. )
Are there any other methods? What kind of instrument is based on the principle of differential pressure? Will it get clogged?
A section is taken out in the middle as a bypass to avoid heat exchange, in order to meet the temperature requirements of subsequent stages.
For example, V-cone flowmeters, Venturi flowmeters, and Anemometer flowmeters can all be used. For the issue of blockages caused by Kelvin effect, it is recommended to use V-cone flowmeters, as they are resistant to dirt, less prone to blockage, and offer good performance.
Differential pressure types such as V-cone and Weiba are suitable, as they are not prone to clogging
The differential pressure type can be purged on a timed basis; the target type can also be purged. The temperature range is quite wide – measurements can be taken up to over 500 degrees, while for 700 degrees it’s best to consult the manufacturer.
Thermal methods should be ruled out; even if the temperature requirements are met, it is not recommended to use thermal methods for measuring flue gas.