On-line analysis of ash containing slurries

Details On-line analysis of ash containing slurries On-line analysis of ash containing slurries

1988-06-07

1990-04-10

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Fluorescence

378 47, 378 88, 138 37, G01N 23223

Patent

active

049167197

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.

REFERENCES:
patent: 2878831 (1959-03-01), Farnham et al.
patent: 3270204 (1966-08-01), Rhodes
patent: 3889113 (1975-06-01), Rhodes
patent: 4090074 (1978-05-01), Watt et al.
patent: 4282434 (1981-08-01), Lyman
patent: 4388530 (1983-06-01), Lubecki
patent: 4450576 (1984-05-01), Lubecki
patent: 4486894 (1984-12-01), Page
patent: 4566114 (1986-01-01), Watt
"The On-Line Measurements of Ash in Coal Slurries" by Itawatra et al.

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