System for the in-line extraction and dilution of a representati

Details System for the in-line extraction and dilution of a representati System for the in-line extraction and dilution of a representati

1998-02-25

2000-02-01

Font, Frank G.

Optics: measuring and testing

For size of particles

By particle light scattering

356335, 356337, 356338, 356 73, G01N 1502, G01N 2100

Patent

active

060209607

ABSTRACT:
A system is disclosed for the extraction and delivery of a diluted representative sample of a processed medium, flowing as a process stream in a conduit, for the analysis by a particle measurement instrument. The system includes a shroud tube located within the conduit, longitudinally aligned with the process stream and arranged to receive and allow a portion of the process stream to flow therethrough. A diluent delivery apparatus includes an emitter that is located in the shroud tube arranged to release a stream of diluent into the shroud tube. The diluent released by the emitter mixes with the processed medium within the shroud tube. A sample recirculation apparatus is connected to the particle measurement instrument and includes a collector located in the shroud tube downstream from the emitter and a drain located in the conduit downstream of the collector. The collector captures representative samples of the diluted processed medium flowing past the collector and conveys, on a continual basis, the captured samples to the particle measurement instrument for analysis. The representative samples displaced by the newly arriving samples are conveyed to the drain and returned to the process stream flowing in the conduit. The flow of the diluent from the emitter can be adjusted by manipulating a flow control device. The flow control device can be adjusted manually or automatically by the controlling output of a controller responsive to output signals from the particle measurement instrument.

REFERENCES:
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patent: 5074158 (1991-12-01), Tokoyama
patent: 5274431 (1993-12-01), Kuroda
patent: 5287168 (1994-02-01), Poucher et al.
patent: 5416580 (1995-05-01), Trainer
patent: 5568266 (1996-10-01), Ciza et al.
patent: 5757476 (1998-05-01), Nakamoto et al.
patent: 5801820 (1998-09-01), Bysouth et al.

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