On-line analysis of ash containing slurries
US4916719A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1988 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Jun 7, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The ash content of coal suspended in a slurry is determined by bombarding a sample of the slurry flowing past a window of a measuring chamber with radiation from an annular nucleonic source, such as Cm-244, for emitting radiation within the range of about 7 to about 30 KeV and causing the sample to emit both backscattered and iron fluorescent x-rays. These x-rays are detected by a radiation detector which produces first and second electrical signals representative of the intensity of each. The density of the sample flowing from the measuring chamber is measured, such as by a nucelonic density gauge, to produce an electrical signal representative of the density and the ash content is determined from the detected intensities of the backscattered and iron fluorescent x-rays and the sample density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.