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What causes the periodic \"fluctuations\" in traffic volume?

2010-08-22View Original

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We reduce the flow rate by 2 units, with fluctuations occurring every 6 to 7 hours. The flow rate rises from around 200 tons to nearly 300 tons in an instant, before returning to normal levels; the entire process takes less than 10 seconds. The motor current fluctuates in sync, and all parameters of the tower remain stable. Do you think the issue is mainly caused by the control valve, or by the pump? Or is there some other cause?
Reply #22010-08-23
1. In the past, the flowmeter experienced fluctuations because moisture in the purge air caused moisture to accumulate in the regulator valve’s filter, leading to periodic fluctuations. 2. Has the operating system been checked? 3. Still, conduct a detailed inspection from the instrumentation perspective.
Reply #32010-08-23
The change in motor load indicates that the flow rate indeed increases. Since all other parameters of the tower are normal, this change is abnormal – yet there is no change in the liquid level inside the tower? 100 tons is indeed a significant amount. With periodic fluctuations, the problem is likely to lie near the secondary extraction point – could it be an issue with the control valve?

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