Rotating drum filter
US4927435A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Mar 31, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D46/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A perforated drum (10) rotates in a coaxial cylindrical housing (18) having three circumferential ports (19,22,23), and an axial outlet (24) at one end. The axis (11) is horizontal. A fibrous filter medium (20) is fed through a port (19) on or near the top of the housing (81) by a distributing mechanism (36) which lays a uniform mat (26) of the desired thickness onto the rotating drum (10). This mat (26) is carried by the drum (10) to a second port (23) through which dirty fluid (13) enters. The fluid (13) passes through the filter (26) and the cleaned stream (16) exits through the open end (15) of the drum (10) and the axial port (24) in the housing (18). The dirty filter material (20) is carried on to a third port (22) near the bottom of the housing (18) and drops into a receiver (31) from which it is continuously removed, cleaned (30), and returned (32) to the charging port (36) at the top. To support the filter mat, the perforated cylinder may carry a series of tines (40), shaped blades (41), or pockets, so that the mat (26) will not fall from the drum (10) prematurely. To minimize risk of mat failure, the fluid inlet port (23) may be located above the horizontal centerline (11…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.