Regarding the vibration at the outlet of the SO2 fan
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When the flue gas volume is low, reducing the inlet opening and speed causes vibration in the outlet pipeline; anyone who knows about this please share some advice
The rotational speed is decreasing; it is possible that the actual speed is within the fan’s surge zone.
It hurts so much – if the air intake is reduced, it stops vibrating; what a pity
The circulation valve of the fan can be opened.
This is fan surge, which occurs when the negative pressure at the inlet plus the positive pressure at the outlet exceeds the head pressure. It should be capable of reducing the fan’s speed through frequency conversion; you can appropriately lower the frequency when shutting off the inlet
When the fan reaches the resonance point, it is possible to slightly open the fan’s circulation valve, and then adjust the fan’s frequency so as to move it away from that resonance point