Method and apparatus for working up a sample of liquid
US5964984A · kind A · utility
Inventors
Key dates
| Filing date | Dec 22, 1997 |
| Grant date | Oct 12, 1999 |
| Priority date | — |
| Expiry date | Dec 22, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/34
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus act on a sample liquid of a pulp and paper industry process water, such as a pulp slurry or white water. The sample is acted upon in an apparatus including sample flow chamber, a filtrate flow chamber, and a filter connecting the sample flow chamber with the filtrate flow chamber. A flow sample liquid, including solid substances such as fibers and filler materials (as well as dissolved and colloidal substances) is introduced through an inlet into the sample flow chamber. A main flow of the sample liquid is discharged through an outlet. A flow of filtrate is passed through a filter from the sample flow chamber into the filter flow chamber, thereby separating a predetermined fraction of solid substance from a minor portion of the introduced flow of sample liquid, in the filter. The minor portion of sample liquid corresponds to less than 1%, typically less than 0.1%, of the total introduced flow of sample liquid. A mat of solid substances is prevented from building up on the inlet side of the filter by inducing in the sample flow chamber turbulence or a high flow velocity of sample liquid adjacent the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.