Flow meter selection
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I’m seeking advice from the experts! How to select flow meters for thermal power plants?
The range is too wide; the selection varies depending on the medium and conditions.
In the denitration system, there is a flow meter at the inlet of the urea pyrolysis furnace; the temperature is 320 degrees, the pressure is 8200 Pa, the maximum flow rate is 1250 Nm3/h, the minimum flow rate is 450 Nm3/h, and the pipe diameter is DN250. Please advise!
For the air flow rate at the inlet of the pyrolyzer, an vortex flow meter will suffice; if high precision is not required, an orifice plate can also be used.
For the air flow rate at the inlet of the pyrolyzer, an vortex flow meter will suffice; if high precision is not required, an orifice plate can also be used.
It is recommended to choose vortex flow meters~~skip orifice plates; their deviation is too large~~~
Based on the parameters provided by the poster, it is almost certainly measuring the heat air flow rate. Due to the large pipe diameter and low flow rate, the flow velocity is relatively low. After calculation, it is approximately 7 Nm/s, with a minimum flow velocity of 2.55 Nm/s. It is recommended to use a thermal gas mass flow meter. This type of flow meter is installed in an insertion manner, making it easy to install and remove, and it can also be installed and removed online. Since it is a mass flow meter, temperature and pressure compensation as well as a flow calculator are not required. In terms of configuration, it is simpler and less hassleful compared to flow meters using other methods. It operates stably and requires no maintenance. Due to the high operating temperature, it is recommended to use a thermal mass flow meter with a high-temperature probe.
High precision isn’t necessary for vortex flow meters; they are versatile. If cost is not a concern, then a mass flow meter is definitely the better choice! What if the price difference is 10 times?
The venturi differential pressure flow meter is unbeatable and covers every detail; it outshines all other crappy, foolish, idiotic, and insane flow meters. {:2_45:} The monkey sits in the tree, with its heavenly eyes open.