What type of flow meter is suitable for the PSA outlet stream in hydrogen purification? Thank you!
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Our unit was originally designed to use a thermal-mass flow meter, but the measurements obtained from this type of meter are not accurate. Is there a suitable flow meter available?
If the inaccuracy is caused by pressure fluctuations, you can try using a mass flow meter, one based on the Coriolis principle.
All mass flowmeters are inaccurate, so I don’t know what flowmeter to recommend to you
There should be a pressure stabilizing tank after the pressure swing adsorption outlet; otherwise, significant pressure fluctuations will occur during equalization, and any flow meter will have errors. Orifice plate flowmeters have the highest error when used in this application, while mass flowmeters are too expensive.
It’s a metal rotor here~~ it makes such a clanging sound~~
I have also worked with many devices that used rotameters, and indeed the problem of the rotor colliding upward and downward, as you mentioned, does occur. For instance, when I was dismantling a set of equipment, one of the flow meters used to measure the conversion gas flowing into the PSA unit was also of the rotameter type; it couldn’t be used apparently due to an error in density calculations during the design phase. I have also worked with some systems that use vortex flow meters and orifice plates. Based on my experience, whether the flow rate remains stable depends mainly on the process design, as well as on the actual operation practices. It is necessary to avoid the problem of the final charging valves opening too quickly, as well as the issue of the system pressure regulating valves being too sensitive. If the final charging control valve opens too quickly, a large amount of product gas will flow back, resulting in a significant decrease in the amount of product gas exiting the system. If the system pressure regulating valve is too sensitive, it will cause the valve to operate frequently, and even excessive regulation can lead to significant fluctuations in the flow rate of the product gas.
At low loads, the final charging time is longer; it is possible to adjust the final charging valve to open more slowly, but this becomes problematic at high loads~~
What kind of device are you? Who designed that one?
I used to be from Sichuan Asia United. Naphtha or natural gas? Which company are you from? :handshake
Looking at your information, it seems to be nail cracking; could it be AFK?