On-line slurry ash monitoring system

Details On-line slurry ash monitoring system On-line slurry ash monitoring system

1989-09-14

1991-11-12

Westin, Edward P.

X-ray or gamma ray systems or devices

Specific application

Absorption

378 45, 378 83, 378 51, G01N 2306, G01N 23223

Patent

active

050654160

ABSTRACT:
An on-line slurry ash monitoring system for evaluating the composition of coal slurries in coal preparation plants. A coal slurry is introduced into a sample reservoir where it is removed and passed through a closed loop slurry transport system which causes the sample to be directed through a sensor and recirculated back to the reservoir. In order to enhance sensor accuracy, a sample is exposed to vacuum pressure conditions which removes gas bubbles and dissolved gases from the sample. The sensor is preferably a radiation absorption type in which characteristic absorptions of coal particles, ash and iron are evaluated by associated electronics to provide an output of slurry composition.

REFERENCES:
patent: 4282434 (1981-08-01), Lyman
patent: 4388530 (1983-06-01), Lubecki et al.
patent: 4450576 (1984-05-01), Lubecki et al.
patent: 4486894 (1984-12-01), Page et al.

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