The inlet of the bottom pump in the vacuum tower operates under negative pressure, so there is a possibility of air leaking into the pump, right?
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The inlet of the bottom pump in the vacuum tower operates under negative pressure, so there is a possibility of air leaking into the pump, right?
There’s no need to worry about this; the Tabi pump is much more dangerous: in theory, if the pump is operated properly, it remains filled with liquid~
The pressure inside the vacuum tower is negative, but the inlet of the pump is at positive pressure. Generally, there is a pressure gauge at the pump inlet at the bottom of the vacuum tower; you might want to check that.
The pump inlet is at positive pressure; however, if the mechanical seal leaks, it will prevent the pump from delivering fluid
The inlet of the bottom-reduction pump should be under slight negative pressure when the pump is operating normally; why isn’t it under positive pressure? This is related to the design of the liquid level at the bottom of the tower. However, this is not the main factor. If the liquid level at the bottom of the tower is set too high, it is possible to ensure positive pressure at the pump inlet, but it becomes difficult to extract heavier fractions from the crude oil. Moreover, it is hard to increase the flow rate once the pump becomes empty
It’s impossible; there’s not the slightest chance of it happening, unless the tower is empty. If the inlet of the centrifugal pump is under negative pressure, it’s not possible for the pump to function properly. The decompression tower is installed at a certain height precisely to ensure that the pump can operate correctly. For the pump to work properly, there must be pressure to force the liquid into the pump. If there’s a leak at the inlet of the pump at the bottom of the decompression tower, the residue oil will leak out and catch fire on its own.
Under normal circumstances, it shouldn’t be negative pressure, right?
The pump inlet pipeline is at positive pressure, while the suction chamber of the pump is at slightly negative pressure. The height of the depressurization tower skirt must be sufficient to ensure the priming height of the pump; otherwise, the pump will not be able to draw in fluid. If anyone encounters sand holes in the pump body, they will understand.