Regarding the vibration of gas-liquid reaction reactors
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I have a question for everyone: the reaction between methanol and fatty acids. As shown in the figure, the excess methanol first enters Reactor C for reaction, while the remaining methanol enters Reactor B in gaseous form to continue the reaction; thereafter, the methanol gas exits Reactor B and proceeds to the methanol tower for distillation. It has been observed that once the gaseous methanol from vessel C enters vessel B after heating, vessel B vibrates violently. From the sight glass, the liquid level and stirring condition in Tank B also appear quite stable. I’d like to ask everyone for the reason.
I think we can try it this way: first, verify whether the actual amount of gas entering and leaving Reactor B matches the calculations； Secondly, pause the mixer in Reactor B for a while and see if there is still vibration
Vibration continues even when the mixer in Tank B is turned off.
I had thought that it might be due to deposits on the blades of the mixer in tank B – for example, saturated long-chain fatty acids causing vibrations, or unstable vibrations of the mixer resulting from a misalignment or damage to the shaft seal. It seems that’s not the issue here.
Is there a valve on the methanol pipeline from Tank C to Tank B? Are there any valves on the distillation pipeline of the methanol removal tower in Reactor B? If so, try adjusting it slightly up or down; it is suspected that resonance is caused by the flow shock when methanol from tank C enters tank B.
All of them require valves, which are installed at the bottom of the reactor, and they are all in the fully open position.
Try adding a buffer tank or something between B and C; could it be that the flow rate in tank B is unstable?
It’s been fixed; it was more or less this issue. This is how I resolved it: I adjusted the opening degree of the intake valve; it seems that an excessive opening degree was causing unstable gas flow rates.
1. Control the air intake flow rate. 2. Use the air inlet as a gas distributor. 3. Verify the gas outlet pipeline – it should not be too small, but it also shouldn’t be too large
Vibration during underwater air inflation is normal, and mechanical means are required to reduce vibration. The air flow is steady and well-distributed, and the fixing and vibration damping of the tank also help to reduce vibrations