Water phase concentrated phosphoric acid extraction process and core process equipment:

Wet process phosphoric acid filtrate - filtration concentration - reciprocating sieve plate extraction tower TBP extraction - extraction phase concentration

Core equipment: reciprocating sieve plate extraction system

Including reciprocating sieve plate extraction column (RPEC), extraction agent feed preheating heat exchanger, feed liquid storage tank, extraction agent storage tank, extraction liquid storage tank, waste liquid storage tank, automation controller, etc;

The basic structure of RPEC is to install a series of perforated sieve plates on the central axis of the tower. The central axis is driven by the driving mechanism at the top of the tower to perform reciprocating motion. The light phase and heavy phase enter from the bottom and top of the tower respectively. Due to the reciprocating vibration of the tray, the two-phase liquid in countercurrent contact is evenly dispersed, with a large mass transfer area. Then, the light and heavy two-phase liquids are clarified and separated at the top and bottom of the tower, completing the continuous countercurrent extraction process.

Compared with other types of extractors, RPEC is an efficient continuous extraction equipment with external energy, used in liquid-liquid extraction processes, with maximum volumetric efficiency, small amount of extractant, solvent savings, and cost reduction. It is also suitable for materials that are prone to emulsification and impurities. Due to the adjustable parameters of the tower, it is flexible and convenient to operate, and has a wide range of applicability.