Method for sampling plant fluids
Abstract
Abstract AN AUTOMATIC METHOD FOR THE SAMPLING OF A PLANT FLUID CONTAINING SUSPENDED FINE SOLIDS TO PROVIDE A SUBSTANTIALY CONTINUOUS SUPPLY OF CLEAR FLUID FOR ANALYSIS. THE COMPOSITION OF THE FLUID IS SUBSTANTIALLY CONTINUOUSLY MONITORED. THE PROCESS COMPRISES (A) REPEATEDLY AND SEQUENTIALLY (I) WITHDRAWING A SAMPLE STREAM OF FLUID FROM THE PLANT; (II) FILTERING SAID SAMPLE STREAM, WHEREBY A FILTER CAKE ACCUMULATES AND THE FILTERED SAMPLE STREAM IS INITIALLY CLOUDY AND SUBSEQUENTLY BECOMES CLEARER AS THE FILTER CAKE ACCUMULATES; (III) ISOLATING THE CLEARER POR- TION OF THE FILTER SAMPLE TO OBTAIN CLEAR SAMPLE FLUID; (IV) DISPERSING THE FILTER CAKE BY BACKWASHING; (B) COLLECTING SUCCESSIVELY ISOLATED PORTIONS OF SAID CLEAR SAMPLE FLUID TO PROVIDE A SUPPLY OF CLEAR FRESHLY FILTERED FLUID IN A HOLDING VESSEL; (C) SIMULTANEOUSLY, AND SUBSTANTIALLY CONTINOUSLY, WITHDRAWING FLUID FROM THE SUPPLY IN SAID HOLDING VESSEL; AND (D) ANALYSING SAID WITHDRAWN FLUID.
Inventors
- 👤 W Hamshere
- 👤 T Atkinson
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |