SYSTEMS AND METHODS FOR DOSING SLURRIES TO REMOVE SUSPENDED SOLIDS
First Claim
Patent Images
1. A system for dosing a slurry to remove suspended solids, the system comprising:
- a batch mix tank;
an electroacoustic zeta potential sensor in fluid communication with the batch mix tank;
a coagulant feed system for adding coagulant to the batch mix tank; and
a coagulant control system, the coagulant control system comprising a controller communicatively coupled to the coagulant feed system and configured to terminate coagulant addition based on a zeta potential parameter.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods for dosing slurries to remove suspended solids from the slurry are disclosed. The systems and methods may be used to dewater slurries having relatively high solids content such as earthen slurries. In some embodiments, the zeta potential of the slurry is monitored by an electroacoustic zeta potential sensor to control coagulant addition.
1 Citation
47 Claims
-
1. A system for dosing a slurry to remove suspended solids, the system comprising:
-
a batch mix tank; an electroacoustic zeta potential sensor in fluid communication with the batch mix tank; a coagulant feed system for adding coagulant to the batch mix tank; and a coagulant control system, the coagulant control system comprising a controller communicatively coupled to the coagulant feed system and configured to terminate coagulant addition based on a zeta potential parameter. - View Dependent Claims (2, 7, 9, 12, 16, 18, 21)
-
-
3-6. -6. (canceled)
-
8. (canceled)
-
10-11. -11. (canceled)
-
13-15. -15. (canceled)
-
17. (canceled)
-
19-20. -20. (canceled)
-
22. (canceled)
-
23. A system for dosing a slurry to remove suspended solids, the system comprising:
-
a coagulant feed system for adding coagulant to an infeed slurry, the coagulant feed system comprising; a coagulant mixing vessel; a first coagulant feed port formed in the coagulant mixing vessel; a first zeta potential sensor downstream of the first coagulant feed port, a first mixing zone of the coagulant mixing vessel being defined between the first coagulant feed port and the first zeta potential sensor; a second coagulant feed port formed in the coagulant mixing vessel; and a second zeta potential sensor downstream of the second coagulant feed port, a second mixing zone of the coagulant mixing vessel being defined between the second coagulant feed port and the second zeta potential sensor; one or more coagulant feed pumps in fluid communication with the first and second coagulant feed ports; and a coagulant control system, the coagulant control system comprising a controller configured to control coagulant addition based on a zeta potential parameter sensed by the first and/or second zeta potential sensor. - View Dependent Claims (24, 30)
-
-
25-29. -29. (canceled)
-
31. A method for dewatering earthen slurries, the method comprising:
-
ejecting slurry from a slurry transport vehicle into a pretreatment system to remove an initial amount of solids from the slurry and produce a solids-depleted slurry; introducing the solids-depleted slurry into a batch mix tank; adding coagulant to the solids-depleted slurry in the batch mix tank to change the zeta potential of the slurry; and adding flocculant to the solid-depleted slurry in the batch mix tank to agglomerate suspended solids and form an agglomerated suspension; and separating solids from the agglomerated suspension. - View Dependent Claims (33, 35, 39, 41, 43, 44, 46, 47)
-
-
32. (canceled)
-
34. (canceled)
-
36-38. -38. (canceled)
-
40. (canceled)
-
42. (canceled)
-
45. (canceled)
Specification