Extraction equipment for microalgae extraction

The extraction equipment comprises a tower body (1), an upper sealing cover (2) and a lower sealing cover (3) are respectively arranged at the upper end and the lower end of the tower body (1), a reciprocating screw rod (5) driven by a motor (4) is arranged at the upper end of the upper sealing cover (2), a screw rod seat (6) on the reciprocating screw rod (5) is connected with a connecting rod (7), sieve plates (8) which are uniformly distributed are arranged on the connecting rod (7), and movable brushes (11) are arranged on the sieve plates (8) through guide grooves (10). A connecting rope (12) connected with the upper sealing cover (2) is arranged on the movable brush (11), a raw material liquid inlet (13) and an extracting agent inlet (14) are respectively formed in the upper side and the lower side of the tower body (1), and an extraction phase outlet (15) and a raffinate phase outlet (16) are respectively formed in the upper sealing cover (2) and the lower sealing cover (3). Self-cleaning can be achiev