Water clarification apparatus

• US 5,492,622 A
• Filed: 12/20/1994
• Issued: 02/20/1996
• Est. Priority Date: 09/28/1990
• Status: Expired due to Term

• Current Assignee: Siemens Energy Incorporated (Siemens AG)
• Original Assignee: Paul C. Broussard
• Inventors: Broussard, Paul C.
• Primary Examiner(s): Lithgow, Thomas M.
• Application Number:
  US08/359,406
• Time in Patent Office: 427 Days
• Field of Search: 210/202, 210/207, 210/221.1, 210/221.2, 210/294, 210/256, 210/512.1, 210/512.2, 210/295, 209/728, 209/733, 209/729
• US Class Current: 210/202
• CPC Class Codes: B01D 17/0205 by gas bubbles or moving solids
• CPC Class Codes: B01D 17/0214 with removal of one of the phases
• CPC Class Codes: B01D 21/00 Separation of suspended solid particles from liquids by sedimentation separation of ores or the like by sedimentation B03B5/48 - B03B5/60 ; differential sedimentation B03D3/00; purification of water, waste water, sewage or sludge C02F, e.g. devices for separating or removing fatty or oily substances or similar floating material from water, waste water or sewage C02F1/40
• CPC Class Codes: B01D 21/0003 Making of sedimentation devices, structural details thereof, e.g. prefabricated parts
• CPC Class Codes: B01D 21/0027 Floating sedimentation devices
• CPC Class Codes: B01D 21/003 Sedimentation tanks provided with a plurality of compartments separated by a partition wall B01D21/0039 takes precedence
• CPC Class Codes: B01D 21/0039 Settling tanks provided with contact surfaces, e.g. baffles, particles
• CPC Class Codes: B01D 21/0045 Plurality of essentially parallel plates
• CPC Class Codes: B01D 21/0087 Settling tanks provided with means for ensuring a special flow pattern, e.g. even inflow or outflow B01D21/2411 takes precedence
• CPC Class Codes: B01D 21/2411 having a tangential inlet
• CPC Class Codes: B01D 21/2427 The feed or discharge opening located at a distant position from the side walls
• CPC Class Codes: B01D 21/2433 Discharge mechanisms for floating particles
• CPC Class Codes: B01D 21/26 Separation of sediment aided by centrifugal force or centripetal forcecentrifuges B04B; cyclones B04C
• CPC Class Codes: B01D 21/267 by using a cyclone
• CPC Class Codes: B01D 2221/06 Separation devices for industrial food processing or agriculture
• CPC Class Codes: B03D 1/1418 using centrifugal forces
• CPC Class Codes: B03D 1/1475 Flotation tanks having means for discharging the pulp, e.g. as a bleed stream
• CPC Class Codes: C02F 1/24 by flotation C02F1/465 takes precedence

Abstract

An apparatus and method for clarifying a contaminated fluid comprising a separator vessel having therein a pair of cyclonic flow chambers; preliminary spiral separators introduce the contaminated fluid to be separated into the cyclonic flow chambers by tangential inlets so as to establish a swirling body of fluid in each chamber; the cyclonic flow chambers have a shell positioned below their respective tangential inlets for discharging separated solids to a collection area and separating an oil and water mixture into a fluid flow zone formed by the cyclonic flow chambers and the wall of the separator vessel wherein water and oil are separated by aeration provided by sparging tubes; a vertical outlet port discharges separated oil and gas from the upper portion of the cyclonic flow chambers to a fluid flow zone wherein oil and gas are separated. The separated water, oil, gas and solids are removed through discharge ports.

Claims

1. An apparatus for clarifying a contaminated fluid, comprising:

(a) a separator vessel having provided therein a plurality of cyclonic flow chamber means, one of said cyclonic flow chamber means being of a different size than at least one other of said cyclonic flow chamber means, whereby different flow rates are established therein, each of said cyclonic flow chamber means including;

(i) a first vertical cylindrical shell having an outlet at the bottom and being closed at the top; and

,

(ii) a second cylindrical shell concentrically positioned within said first shell, thereby providing an annular space therebetween, and having an outlet port at the top which extends outside of said first cylindrical shell and being open at the bottom;

(b) means for tangentially introducing said contaminated fluid to be separated into each of said annular spaces between said first and second shells so as to establish swirling bodies of fluid therein;

(c) a third cylindrical shell annularly surrounding a lower portion of said first shells of said cyclonic flow chamber means and extending below the outlets of said first shells, the upper portion of said third shell being positioned below said tangential introducing means;

(d) means for discharging a first separated fluid of said contaminated fluid into a first fluid flow zone in said separator vessel, said means for discharging comprising the upper portion of said third cylindrical shell and the lower portion of said first cylindrical shells, said first fluid flow zone being formed by the outer walls of said shells and said separator vessel; and

,

(e) means for discharging a second separated fluid from said outlet port at the upper portion of each of said second shells to a second fluid flow zone located in the upper portion of said vessel.

2. The apparatus of claim 1, further comprising aeration means for introducing air into said first fluid flow zone.

3. The apparatus of claim 2, wherein said aeration means includes an inlet port connected to a semi-circular conduit having a discharge nozzle at its proximate and distal ends.

4. The apparatus of claim 1 further comprising filtration means positioned intermediate said first and second fluid flow zones for collecting oil droplets from said first separated fluid as it passes therethrough.

5. An apparatus for clarifying a contaminated fluid comprising:

(a) a cylindrical separator vessel having provided therein a plurality of cyclonic flow chamber means, one of said cyclonic flow chamber means being of a different size than at least one other of said cyclonic flow chamber means, whereby different flow rates are established therein, each of said cyclonic flow chamber means including;

(i) a first vertical cylindrical shell closed at the top and having a lower truncated portion having an outlet at the bottom thereof; and

,

(ii) a second cylindrical shell concentrically positioned within said first shell, thereby providing an annular space therebetween, and being open at the bottom and having an outlet port at the top which extends outside of said first cylindrical shell which passes through said first shell;

(b) means for tangentially introducing said contaminated fluid to be separated into each of said annular spaces between said first and second shells so as to establish swirling bodies of fluid therein;

(c) a third cylindrical shell annularly surrounding a lower portion of said first shells of said cyclonic flow chamber means extending below the outlets of said first shells, the upper portion of said third shell being positioned below said tangential introducing means;

(d) means for discharging a first separated fluid of said contaminated fluid into a first fluid flow zone in said separator vessel, said means for discharging comprising the upper portion of said third cylindrical shell and the lower portion of said first cylindrical shells, said first fluid flow zone being formed by the outer walls of said shells and said separator vessel; and

,

(e) means for discharging a second separated fluid from said outlet port at the upper portion of each of said second shells to a second fluid flow zone located in the upper portion of said vessel.

6. The apparatus of claim 5, further comprising aeration means for introducing air into said first fluid flow zone.

7. The apparatus of claim 6, wherein said aeration means includes an inlet port connected to a semi-circular conduit having a discharge nozzle at its proximate and distal ends.

8. The apparatus of claim 5, further comprising filtration means positioned intermediate said first and second fluid flow zones for collecting oil droplets from said first separated fluid as it passes therethrough.