Rotary filter wash distributor
US4008154A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1975 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Jul 11, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D11/0273
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A wash liquid distributor for a rotary drum filter which distributes liquid uniformly across the filter cake and provides very effective washing. The distributor apparatus in its preferred embodiment comprises an elongated hollow pipe, one or more being used in parallel operation, each pipe having a multiplicity of evenly spaced and axially aligned small holes. Each hole imposes a substantial pressure drop on the fluid passing therethrough and creates a uniform distribution of the wash liquid along the distributor pipe. To avoid damage to the filter cake from the jets of liquid produced, a diffusion channel is provided which damps the kinetic energy of the jets and subdivides the liquid entering the channel. Upon leaving the diffusion channel the liquid is collected and redistributed from drip points spaced at intervals which are generally narrower than those of the holes in the distributor pipe. In the preferred embodiment such drip points are provided by helical overwrap of wire which serves both to collect liquid leaving the diffusion channel and to redistribute it onto the filter cake. The three-step procedure of the distributor creates a multiplicity of narrow pools of liquid …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.