When the raw material unloading pump in the tank farm starts to unload material, the pump keeps tripping due to gas in the pipeline at low load – what should be done?
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When the raw material unloading pump in the tank area starts to unload material, the pump keeps tripping due to gas in the pipes. The technical supervisor will not allow the low-load trip protection interlock to be disabled – what should be done?
Does the unloading pump have a minimum return line that bypasses to the tank farm?
It should be a centrifugal pump; the workshop said it has self-priming capability and does not require venting. However, after startup, gas is pumped out first, which causes the low current protection to trigger and shut down the machine. The production supervisor will not allow this protection to be disabled.
No, it is delivered directly from the tank truck to the storage tank
How is the outlet pipeline designed? When a self-priming pump starts operating, it takes some time for gas and liquid to separate, allowing any air in the pipeline to be expelled.
There is a problem with the design. Also, regarding the low-load trip protection interlock, could the set value be changed?
Method 1: Manually remove the gas from within the pipeline. Method 2: Add a small tank between the tank truck and the pump to ensure that no gas enters the pump; the drainage connections of this small tank, the tank truck, and the storage tank should be balanced. Method 3: Release the gas in several batches, and it will naturally be expelled. These are some personal insights.
It is phenol being unloaded; it is in a solid state at temperatures below 40 degrees, so heating is required throughout the process； Phenol is toxic and cannot be discharged directly.