Negative pressure at the inlet of the triple-effect evaporation pump
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I am now working on a three-effect evaporator; according to the current process calculations, the evaporation temperature is 93 degrees for the first effect, 74 degrees for the second effect, and 51 degrees for the third effect. The feed solution is sodium chloride wastewater. I’m not sure if this is reasonable; moreover, the equipment is installed at a relatively low height. Due to the high vacuum level in the triple-effect system, the inlet of the evaporation forced circulation pump operates under negative pressure. I wonder if this will have an impact on the process circulation. I’ve just started using a triple-effect system, so I would appreciate any advice
I don’t see any problem; by negative pressure, you mean below normal pressure, right?
MVB should be used; it’s not quite appropriate to opt for multi-effect evaporation for this new evaporation process
The three-effect evaporation tower should be installed at a higher height, ensuring that the required net positive suction head is available for the pump.
The height is now strictly limited; I’m afraid the discharge pump won’t be able to discharge the material
The manufacturer requires that MVR be used these days
If the three-effect forced circulation pump and the three-effect reboiler are integrated as one unit, then there is no problem