US4576714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the clarification of sewage and other liquid-containing wastes
Assignee: Continental Manufacturing and Sales Inc
•
Filing: 1984-06-15
•
Granted: 1986-03-18
•
Expires: 2004-06-15
Abstract
Abstract A novel sewage purification system is provided herein. The system includes a pump for drawing sewage into the system and an injection inlet for injecting chemical into the effluent line from the pump. The pump leads to a pair of interconnected U-shaped mixing chambers connected to the effluent line from the pump, the U-shaped mixing chambers being baffled and being of a particular construction. There is also a recycle line from the inlet line to the mixing chambers back to the pump for recycling about 1-20% of the total flow rate, which is generally about 5-40 gallons/minute through the system. The U-shaped mixing chambers are also provided with at least two injection inlets for injecting chemicals thereinto. A splitter chamber is connected to the outlet from the mixing chambers to provide a pair of parallel flow outlets therefrom. A separator chamber is connected to the parallel flow outlets, the separator chamber having structure therein for providing tangential flow along the inside walls and also for separating sludge therefrom and for withdrawing it from the bottom thereof, and for withdrawing clean water from the upper central core thereof. Finally, a sludge removal line is provided, along with a sludge recycle line for recycling about 1-20% of the sludge back to the pump inlet line.
Inventors
- 👤 Anton P. Pohoreski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:58
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; B; B01; B01D; B01D21/00; B01D21/01; C02F1/5281
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
337 words
A sewage purification system comprising: (a) a pump for drawing sewage into said system; (b) an injection inlet for injecting a first chemical into the effluent line from said pump; (c) a first U-shaped mixing chamber and a second interconnecting U-shaped mixing chamber, said first and second mixing chambers being connected to said effluent line from said pump, each of said first mixing chamber and said second mixing chamber comprising a near arm and a far arm, the inlet to said mixing chambers being to a near arm of a first said mixing chamber, the outlet from said mixing chambers being from a far arm of a second said mixing chamber, the mixing chambers being interconnected between the far arm of said first mixing chamber and the near arm of said second mixing chamber, each of said near arm and said far arm having baffles therein, said baffles extending only partly across the cross-section of said arm and alternating from one longitudinal face to the opposed longitudinal face and each being inclined at the same angle, towards the direction of flow, to tend to cause turbulent flow, and a conduit interconnecting each said near arm with each said far arm, each said conduit including an injection inlet for the injection thereinto of a respective second chemical and respective third chemical into said respective mixing chambers; (d) a splitter chamber connected to the common outlet from said mixing chambers to convert said single flow into a pair of parallel flow outlets therefrom; (e) a separator chamber connected to said parallel flow outlets and having inlet structure therein to cause streams of said chemicallytreated sewage to flow in a unitary direction tengentially along the side walls of said separator chamber, said separator chamber also including means therein for separating sludge therefrom and withdrawing it from the bottom thereof, through a sludge withdrawal line and for withdrawing clean water from the upper central core thereof; and (f) a sludge recycle line interconnecting said separator chamber and said pump inlet line.
Claim 2
Dependent Claim
337 words
A sewage purification system comprising: (a) a pump for drawing sewage into said system; (b) an injection inlet for injecting a first chemical into the effluent line from said pump; (c) a first U-shaped mixing chamber and a second interconnecting U-shaped mixing chamber, said first and second mixing chambers being connected to said effluent line from said pump, each of said first mixing chamber and said second mixing chamber comprising a near arm and a far arm, the inlet to said mixing chambers being to a near arm of a first said mixing chamber, the outlet from said mixing chambers being from a far arm of a second said mixing chamber, the mixing chambers being interconnected between the far arm of said first mixing chamber and the near arm of said second mixing chamber, each of said near arm and said far arm having baffles therein, said baffles extending only partly across the cross-section of said arm and alternating from one longitudinal face to the opposed longitudinal face and each being inclined at the same angle, towards the direction of flow, to tend to cause turbulent flow, and a conduit interconnecting each said near arm with each said far arm, each said conduit including an injection inlet for the injection thereinto of a respective second chemical and respective third chemical into said respective mixing chambers; (d) a splitter chamber connected to the common outlet from said mixing chambers to convert said single flow into a pair of parallel flow outlets therefrom; (e) a separator chamber connected to said parallel flow outlets and having inlet structure therein to cause streams of said chemicallytreated sewage to flow in a unitary direction tengentially along the side walls of said separator chamber, said separator chamber also including means therein for separating sludge therefrom and withdrawing it from the bottom thereof, through a sludge withdrawal line and for withdrawing clean water from the upper central core thereof; and (f) a sludge recycle line interconnecting said separator chamber and said pump inlet line.
Claim 3
Dependent Claim
19 words
The sewage purification system of claim 1 including a sludge holding hopper at the base of said separator chamber.
Claim 4
Dependent Claim
16 words
The sewage purification system of claim 2 including a sludge withdrawal line from said holding hopper.
Claim 5
Dependent Claim
22 words
The sewage purification system of claim 2 wherein said sludge recycle line interconnects said sludge holding hopper to said pump inlet line.
Claim 6
Dependent Claim
19 words
The sewage purification system of claim 1 including a sludge sweeping member at the base of said separator chamber.
Claim 7
Dependent Claim
23 words
The sewage purification system of claim 1 including a valve to control the recycle flow of sludge from said separator to said pump.
Claim 8
Dependent Claim
34 words
The sewage purification system of claim 1 including a valved connector line between the sewage inlet line and the pump effluent line to provide for recycle from pump effluent line back to said pump.
Claim 9
Dependent Claim
64 words
The sewage purification system of claim 1 wherein said inlet structure comprises a pair of diametrically opposed inlets adjacent the upper regions of said separator chamber, said inlets each including a protrussion from the associated side wall of said separator chamber leading to an associated inner directing chamber having a downwardly directed outlet, thereby to direct outward flow annularly downwardly within said separator chamber.
Claim 10
Dependent Claim
16 words
The sewage purification system of claim 8 wherein sid inlets each comprise bulbous side wall protrusions.
Claim 11
Dependent Claim
44 words
The sewage purification system of claim 8 wherein said inlets feed a directing chamber defined by a cylinder, open ended at both ends, having depending cylindrical walls and a protruding annular rim by which it is secured to the inside of said separator chamber.
Claim 12
Dependent Claim
22 words
The sewage purification system of claim 10 wherein said directing chamber provides a continuous, downwardly-directed, outlet door, and a central, upwardly-directed port.
Claim 13
Dependent Claim
28 words
The sewage purification system of claim 8 wherein said means for withdrawing clean water from the upper central core of said separator chamber comprises a valved central outlet.
Claim 14
Dependent Claim
71 words
The sewage purification system of claim 1 wherein said means for separating sludge and withdrawing said sludge from the bottom of said separator chamber comprises: a holding hopper at the base of said separator chamber; a lower sweep mechanism to force sludge to a said hopper; means for removing waste sludge from said hopper; and means for withdrawing a predetermined amount of sludge from said hopper for recycling said withdrawn sludge.
Claim 15
Dependent Claim
24 words
The sewage purification system of claim 13 wherein said sludge recycle and sludge withdrawal is provided by an auger within said sludge holding hopper.
References Cited (Backward Citations)
US3434968A
Cited
US3773660A
Cited
US3899423A
Cited
US4219424A
Cited
US4141832A
Cited
US4274970A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |