A low-range flow meter for measuring the reflux flow rate in a reaction kettle
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The reflux flow rate in our reactor is only a few dozen liters per hour. We have tried using metal rotor flow meters, but found that the resistance exerted by the rotors affects the reflux process and blocks the reflux pathway. Therefore, we are looking to switch to other types of flow meters that are easier to use; accuracy is not a major requirement – it’s sufficient if such meters can indicate only an approximate range of the reflux flow rate. This is crucial for the automatic control of reflux in our system. Please help!
Medium, pipe diameter, pressure, temperature, Reynolds number? The information is too simple to make a choice from. Well, I’m just passing by and checking things out
Low resistance: mass flow meter, but at a higher price.
At atmospheric pressure, using substances like ammonium bromide, temperature below 110 degrees, pipe diameter can be adjusted, there is shrinkage, Reynolds number unknown
Can’t afford it, and there’s no suitable place either
For applications where precision isn’t a priority, and where cost is low along with simple maintenance, nothing other than the rotor comes to mind. As for the issue of the opening being blocked or problems with the parameters provided, this can be resolved through diameter reduction or other methods offered by the manufacturer. Or choose a orifice plate rotor, instead of the one with a spinal canal design. Huhu~~ Since cost is a concern and high precision isn’t necessary, options that can merely indicate flow rate will suffice. If one is willing to invest a bit more, vortex flow meters or electromagnetic flow meters (suitable for media with dielectric constants) are good choices; for those willing to spend even more, mass flow meters are also an excellent option. Putting it together, I think the pressure in your pipeline is too low, so a differential pressure flow meter doesn’t seem to be a suitable choice……
I just don’t know if a water meter will work; haha, this is the cheapest option
Are there suitable electromagnetic flowmeters for low flow rates?
Look at the dielectric constant; if precision requirements are not high, an electromagnetic option can be chosen. The rotor is a variable-area flow meter; there is pressure loss, and differential pressure types are not considered either.
Ask the manufacturers of positive displacement flowmeters. Both vortex flow meters and electromagnetic flow meters require a certain flow velocity; it’s likely that they won’t work well in your situation.