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US 7,088,446 B2Granted
Optical measurement of the chemical constituents of an opaque slurry
AssigneeParticle Measuring Systems, Inc.
InventorTodd A. Cerni
Life of this patent
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AssigneeParticle Measuring Systems, Inc.
InventorTodd A. Cerni
Estimating the term…
An opaque slurry chemical constituent measurement system includes a cross-flow or membrane filter having a porous filter element connected between a global slurry loop and a spectrometer. The opaque slurry particles cannot pass through the filter element but pass through the filter cartridge into the day tank, while the chemical constituent to be measured permeates through the filter element to the spectrometer, where it is measured, and thence to a reservoir. About once every five minutes the porous filter element is reverse flushed for less than a second to clear the filter pores. One to several times per hour, the reservoir is emptied into the day tank. The system provides essentially continuous measurement of the slurry chemical composition, does not consume reagent chemicals, does not create a chemical waste stream, and provides high reliability and low maintenance by preventing the abrasive slurry particles from contacting the fluidic sampling valves.
A method of measuring a chemical constituent of an opaque slurry comprising opaque slurry particles and said chemical constituent, said method comprising:
A method of measuring a chemical constituent of an opaque slurry comprising opaque slurry particles and said chemical constituent, said method comprising:
A method of measuring a chemical constituent of an opaque slurry comprising opaque and abrasive slurry particles and said chemical constituent, said method comprising flowing said chemical constituent into an optical detector and measuring said chemical constituent without ever contacting a fluid valve with said abrasive slurry particles.
A system for measuring a chemical constituent of an opaque slurry comprising opaque slurry particles and said chemical constituent, said method comprising:
A system for measuring a chemical constituent of an opaque slurry comprising opaque slurry particles and said chemical constituent, said systems comprising:
Dependencies are inferred from the claim text.