| 摘要 |
A rapid backwashing filter; a hollow outer drum (13) arranged longitudinally on the top of a shell (18), an inner drum (14) fitting inside the outer drum (13), the outer drum (13) being rotatably mounted on the shell (18) and passing downwards through a post-filtering channel (5) and a pre-filtering channel (2); the inner drum (14) is fitted inside the outer drum (13), and the sides of the inner drum (14) and the outer drum (13) are correspondingly provided with an upper valve opening (15) and a lower valve opening (16), the position of the upper valve opening (15) corresponding to the post-filtering channel (5), and the position of the lower valve opening (16) corresponding to the pre-filtering channel (2); when the outer drum (13) rotates, a liquid inlet (17) is connected to or disconnected from the pre-filtering channel (2), and the post-filtering channel (5) is simultaneously connected to or disconnected from a liquid discharge outlet (12); a baffle (14a) is provided between the upper valve opening (15) and the lower valve opening (16) of the inner drum (14), a lower end of the outer drum (13) and the inner drum (14) is open and in communication with a residue discharge outlet (1) and the upper end of the inner drum (14) is also provided with a rotary joint (9) used for air intake. |
