Process and apparatus for filtrate measurement
US5641894A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 23, 1996 |
| Grant date | Jun 24, 1997 |
| Priority date | — |
| Expiry date | Jan 23, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/2057
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sampling cylinder 3 is attached to a process piping 2 through which a slurry flows. A front piston 9 and a rear piston 10 which slide within the sampling cylinder 3 are driven via a driving rod 12 by a fluid pressure cylinder 11. These two pistons 9,10 are allowed to slide to collect the slurry into a sampling space 30 defined between the pistons 9,10. The front piston 9 is brought closer to the rear piston 10 to reduce the volume of the sampling space 30. Thus, only the filtrate in the slurry is fed through a filter 5 into a filtrate collecting tank 6, where pH etc. of the filtrate is measured by a sensor 8. Subsequently, the front piston 9 is brought apart from the rear piston 10 to increase the volume of the sampling space 30. Thus, the filtrate is returned into the sampling space 30 back-washing the filter 5. Then, the slurry in the sampling space 30 is returned to the process piping 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.