To efficiently remove foreign materials and to restrain coloring, crosslinking and generation of gel by inserting a center pole to collect a filtered polymer in a space in leaf disc type filters and discharge it to the outside of a filtering device and integrating a center pole with a filter pressing check into a solid structure.
The leaf disk type filters 5 and spacers 6 are laminated inside the filtering device and the center pole 7 is inserted into the space formed by the inner peripheries of the respective leaf disc type filters 5. A seal packing 9 is disposed between the filter pressing check 4 of the filters 5 and a flange plate 2, and the center pole 7 is integrated with the check 4 into a seamless solid structure. The polymer introduced into the device by passing through a polymer inflow passage 3 is filtered at the filters 5 to pass it through the insides of the filters 5, is collected in a polymer passage 10 to pass it through a hollow polymer passage 11 (a hole opened inside the pole 7) and is discharged to the outside.
| JP4467127 | Filtration method |
MATSUOKA YUKI
SAWAKI TORU
SASAKI KATSUJI
