Reverse problem of vortex street flowmeter
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The methanol plant has a steam pipeline; it sometimes produces steam and sometimes uses it, so the steam in this pipeline flows in one direction at times and in the opposite direction at other times. It is necessary to measure both the steam generated from methanol and the steam used; therefore, we have installed two flow meters on this pipeline. A orifice plate was installed during steam generation, and a vortex street meter was installed during steam use. A problem arises: when steam is generated, orifice plate metering is used, but the steam flows in the opposite direction within the vortex street; yet the vortex street still generates numerical values. How can we eliminate the inaccurate measurement data caused by the reverse flow in the vortex street? ?
I really don’t know; I gave up on studying it! !
Just connect two flow meters in parallel – use the orifice plate when steam is generated by keeping the bypass closed, and use the vortex flow meter when using liquid, by closing this side
If two flowmeters are connected in series on the process pipeline, this cannot be avoided. However, could reversing the vortex flowmeter so that it does not measure any values, or turning off power to it, serve as a compromise solution? The parallel connection mentioned on the third floor is also an option, but it’s a bit complicated due to the need for switching valves for steam supply and steam generation. Finally, I personally think that a flow meter with lateral two-way flow can be used.
Thank you all for your participation. Two additional points: 1. The two tables are connected in series. 2. It is impossible to predict when the steam in the pipeline will flow in one direction or the other.
Connect two meters in parallel and add a one-way valve on the pipeline.