Pipe system for receiving and transporting lime sludge from a white liquor filter
US6793809B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2003 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Nov 3, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/928
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The pipe system is for receiving and transporting lime sludge from a filter medium in a continuously operating pressurized filter 1 in a causticizing process, where lime sludge is scraped off from the filter medium 2 and falls down into receiving chutes 4a for the lime sludge. Conventional storage tanks for scraped-off lime sludge and their mechanical agitators are thus replaced by a pipe system 11 where the pipe system does not have a mechanical agitator at all but has a flow cross section which maintains a flow rate in the lime sludge so that sedimentation of the lime sludge does not take place from the receiving chute 4a to the feed-out opening 30 of the pipe system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.