Method and apparatus for monitoring concentration of a slurry flowing in a pipeline
US6122956A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1998 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Sep 9, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An on-line sensor for measuring volumetric concentration or percent solids of a slurry flowing in a pipeline includes a section of composite or dielectric pipe connected in the pipeline, with a plurality of sensing electrodes mounted around the periphery of the composite pipe having their inner ends in contact with the slurry flowing therethrough. Preferably the inner ends of the sensor electrodes are flush with the inner pipe wall surface. An electrical signal is applied to a bridge circuit that is connected to successive pairs of sensor electrodes around the periphery of the sensor and the ratios of the local conductivity between adjacent pairs of sensing electrodes to the conductivity between a pair of reference electrodes in contact with the liquid are measured and are used to compute the local slurry concentration between adjacent pairs of sensing electrodes. A computer algorithm is used to average the local slurry concentration and produce an output signal representing the average solids volumetric concentration in the pipeline.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.