Regarding the issue of the flash bottom pump not being able to deliver fluid, could anyone please help explain it?
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The water content in the raw material fed to my unit is <0.8%; no water is supplied for electrodialysis, the temperature after desalination is 130, and the flash bottom temperature is 180. Every 8-10 hours, the bottom pump fails to achieve the required flow rate. Preliminary analysis suggests an imbalance in gas-liquid phase exchange, with the light components not entering the atmospheric pressure tower sufficiently; we seek expert advice
It is possible that the light components enter the pump inlet, causing cavitation in the pump; the net positive suction head is insufficient
Can it be explained this way: the trays don’t facilitate effective gas-liquid phase exchange, causing a large amount of gas to accumulate and eventually fall to the bottom of the tower?
It is unlikely that the vapor from the flash tower will reach the bottom of the tower; moreover, the flash tower does not have trays – only diagonal baffles – so it is not easy for the vapor to reach the bottom. It is recommended to consider issues related to moisture content or blockages in the pump filters.
Lift the pumping head of the pump and take a look; also, try raising the temperature at the bottom of the tower slightly.
The light components in the flash tower generally do not end up at the bottom of the tower. If electrodesorption is not in use, is water separation carried out? If the water separation effect is poor, excessive amounts of water may enter the bottom of the flash tower, preventing the pumps from functioning properly. It would be advisable to test the moisture content after desorption