Apparatus for purifying and activating water

• US 5,336,399 A
• Filed: 04/16/1992
• Issued: 08/09/1994
• Est. Priority Date: 12/27/1991
• Status: Expired due to Fees

• Current Assignee: Takekazu Kajisono
• Original Assignee: Takekazu Kajisono
• Inventors: Kajisono, Takekazu
• Primary Examiner(s): Lithgow, Thomas M.
• Application Number:
  US07/869,378
• Time in Patent Office: 845 Days
• Field of Search: 210/170, 210/192, 210/242.2, 210/243, 210/220, 210/219, 210/221.1, 210/169, 210/178, 210/179, 261/120, 261/87, 261/DIG. 42, 261/93, 261/141, 261/140 R, 261/121.1, 366/102, 366/107, 119/215, 119/263
• US Class Current: 210/170.02
• CPC Class Codes: B01F 23/2331 characterised by the introduction of the gas along the axis of the stirrer or along the stirrer elements
• CPC Class Codes: B01F 23/23311 through a hollow stirrer axis
• CPC Class Codes: B01F 23/23312 through a conduit surrounding the stirrer axis
• CPC Class Codes: B01F 23/23314 through a hollow stirrer element
• CPC Class Codes: B01F 23/23341 with tubes surrounding the stirrer
• CPC Class Codes: B01F 23/2373 for obtaining fine bubbles, i.e. bubbles with a size below 100 µm
• CPC Class Codes: B01F 27/1161 having holes in the surface
• CPC Class Codes: B01F 27/80 with stirrers rotating about a substantially vertical axis
• CPC Class Codes: B01F 27/941 being hollow, perforated or having special stirring elements thereon
• CPC Class Codes: B01F 33/503 Floating mixing devices
• CPC Class Codes: C02F 1/46104 Devices therefor; Their operating or servicing
• CPC Class Codes: C02F 1/74 with air aeration of stretches of water C02F7/00
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C02F 3/205 Moving, e.g. rotary, diffusers; Stationary diffusers with moving, e.g. rotary, distributors
• CPC Class Codes: C02F 7/00 Aeration of stretches of water
• CPC Class Codes: Y02W 10/10 Biological treatment of water, waste water, or sewage
• CPC Class Codes: Y10S 261/42 Ozonizers

Abstract

An apparatus for purifying and activating water is provided. The apparatus comprises a drive shaft having a hollow inside, a capsule secured to a lower end of the drive shaft, a device for supporting the drive shaft for rotation so that an upper opening of the drive shaft is positioned above the surface of water and the capsule is positioned in the water, and a motor for rotationally driving the drive shaft, the capsule including a plurality of small apertures communicating with the hollow inside of the drive shaft.

Claims

1. An apparatus for injecting gas into a body of water having a surface, said apparatus comprising;

a base;

float means connected with said base for supporting said apparatus base in a position floating on the water surface and with said base extending generally parallel to and above the water surface;

a non-rotatable outer casing fixed to said base and projecting from said base in a direction transverse to said base and downward into the water from the water surface when said apparatus is floating on the water surface, said outer casing having an axis extending generally vertically when said apparatus is floating on the water surface, said outer casing having upper and lower end portions and a cylindrical inner surface;

a rotatable inner shaft disposed within said outer casing in a coaxial relationship with said outer casing, said inner shaft having upper and lower end portions and a cylindrical outer surface;

bearing means connected with said base and supporting said inner shaft for rotation relative to said base;

said cylindrical inner surface of said outer casing and said cylindrical outer surface of said inner shaft defining between them an annular outer gas flow passage extending axially between said inner shaft and said outer casing, said outer gas flow passage for receiving therethrough a downwardly flowing first gas flow for injection into the water;

said outer gas flow passage having a first gas inlet opening disposed in air above the water surface when said apparatus is floating on the water surface, said outer gas flow passage having a first gas outlet opening disposed in water below the water surface when said apparatus is floating on the water surface;

said inner shaft having an inner surface defining an inner gas flow passage extending axially through said inner shaft, said inner gas flow passage for receiving therethrough a downwardly flowing second gas flow for injection into the water;

said inner gas flow passage having a second gas inlet opening disposed in air above the water surface when said apparatus is floating on the water surface;

said inner shaft lower end portion projecting in the water below said outer casing lower end portion;

said inner gas flow passage terminating in a gas outlet chamber at least partially defined by a cylindrical capsule fixed for rotation with said inner shaft, said capsule including surfaces defining a plurality of second gas outlet openings extending radially from said chamber through said capsule for injecting said second gas flow into the water; and

means for generating negative pressure adjacent to said lower end portion of said outer casing, comprising a motor connected with said base and with drive shaft for rotating said drive shaft and said capsule about said axis to thereby generate negative pressure adjacent to said lower end portion of said outer casing to draw gas into said first gas inlet and through said first gas flow passage and to draw gas into said second gas inlet and through said second gas flow passage.

2. An apparatus as set forth in claim 1, wherein said second gas outlet openings have a size in a range of about 1/1000 mm to about 3/1000 mm.

3. An apparatus as set forth in claim 1 wherein, said bearing means comprising first and second bearings disposed above and spaced from said outer casing, said apparatus being free of bearings within said outer casing.

4. An apparatus as set forth in claim 1 wherein said rotating cylindrical outer surface of said inner shaft includes means to generate static electricity in said first gas flow.

5. An apparatus as set forth in claim 1 further comprising impeller means for drawing air into said inner gas flow passage upon rotation of said inner shaft, said impeller means being fixed for rotation with said upper end portion of said inner shaft and being disposed in air above the water surface when said apparatus is floating on the water surface.

6. An apparatus as set forth in claim 1 wherein said inner shaft is rotatable by said motor at a speed of about 10,000 rpm or more.

7. An apparatus as set forth in claim 1 wherein said outer surface of said inner shaft includes surfaces defining a helical groove extending around said inner shaft along the length of said inner shaft.

8. An apparatus as set forth in claim 1 further comprising an ozone generator connected with said base at a location adjacent to said first gas inlet opening of said outer casing for supplying ozone to said first gas inlet opening.

9. An apparatus as set forth in claim 1 further comprising means for heating said first gas flow, said means for heating being connected with said base at a location adjacent to said first gas inlet opening of said outer casing.

10. An apparatus as set forth in claim 1 further comprising means for cooling said first gas flow, said means for cooling being connected with said base at a location adjacent to said first gas inlet opening of said outer casing.

11. An apparatus as set forth in claim 1 wherein said cylindrical capsule having a diameter greater than the outer diameter of said inner shaft, said cylindrical capsule having a diameter less than the inner diameter of said outer casing.