Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1996-03-13
1998-09-22
Williams, Hezron E.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73 6168, 73 6169, 7386435, 7386481, G01N 1504, G01N 114, B01D 2130
Patent
active
058098259
ABSTRACT:
A device for the determination of the rate of sedimentation of particles in a sample of a liquid and controlling the addition of a flocculant to the liquid in accordance with the rate of sedimentation so determined. The device comprises a sample container (18), a sample inlet duct (17) in fluid communication with the sample container (18) and extending downwardly from a lower end thereof and adapted to extend into a body of liquid to be sampled, a suction unit (34) in fluid communication with an upper end of the sample container (18) and adapted to create a reduced pressure in the sample container such that a sample of the liquid is drawn into the sample container. Units (not shown) are provided to measure the rate of sedimentation of particles in the liquid sample and flocculant addition units (not shown) are adapted to add flocculant to the body of liquid from which the sample was drawn. Units (not shown) are provided to control the addition of flocculant from the flocculant addition units into the body of liquid in accordance with the rate of sedimentation of the particles in the liquid sample. The device is characterized in that the sample inlet duct (17) includes an S-bend (40) having a lower bight portion (46) below a lower end of the sample container (18) and an upper bight portion (47) adjacent to or above the upper end of the sample container (18). A gas inlet duct (45) is provided in communication with the sample inlet duct (17). Valve units (48) in the gas inlet duct (45) control the flow of gas through the duct (45). The valve units (48) are disposed at a level adjacent to or above the upper end of the sample container (18), and control units (not shown) are provided to control the opening and closing of the valve units (48).
REFERENCES:
patent: 3880011 (1975-04-01), Johnson
patent: 3915011 (1975-10-01), Nelson
patent: 4194391 (1980-03-01), Rosenberger
patent: 4313340 (1982-02-01), Schniewind
patent: 4318296 (1982-03-01), Parker et al.
patent: 5431037 (1995-07-01), Howard
Larkin Daniel S.
Oscillation Pty Limited
Striker Michael J.
Williams Hezron E.
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