Method of supplying air masses and producing jets of water

• US 4,752,421 A
• Filed: 09/24/1986
• Issued: 06/21/1988
• Est. Priority Date: 04/01/1986
• Status: Expired due to Term

• Current Assignee: Kaiyo Kogyo Kabushiki Kaisha
• Original Assignee: Kaiyo Kogyo Kabushiki Kaisha
• Inventors: Makino, Masahiko
• Primary Examiner(s): Miles, Tim
• Application Number:
  US06/910,992
• Time in Patent Office: 636 Days
• Field of Search: 261/77, 261/120, 261/124, 210/242.2
• US Class Current: 261/77
• CPC Class Codes: B01F 23/23231 being at least partially immersed in the liquid, e.g. in a closed circuit
• CPC Class Codes: B01F 35/32015 Flow driven
• CPC Class Codes: B01F 35/3203 Gas driven
• CPC Class Codes: B01F 35/71 Feed mechanisms with proportioning B01F35/80
• CPC Class Codes: C02F 3/223 using "air-lift"
• 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

Abstract

A method is provided for use with an apparatus which produces jets of water through a vertical water diffuser tube by supplying individually formed air bubble masses at regular intervals, which are followed by the water being drawn under the action of the air bubble masses. The method improves the water processing efficiency and ability of the apparatus by defining the volumetric quantity of a formed air mass in relation to the diameter of the particular air diffuser tube and defining a certain relationship between the length L (m) of the tube through which the rises and the time interval T (sec) at which the individual air bubble masses are produced.

Claims

1. A method of using an apparatus having a water diffuser tube and a cylindrical air chamber in communication with and extending around a lower peripheral portion of the water diffuser tube adjacent a bottom open end of the tube, said method comprising:

disposing the diffuser tube and the cylindrical air chamber below the surface of a water source with the diffuser tube oriented vertically;

supplying a group of individual air bodies from the cylindrical air chamber into the diffuser tube;

forming said group into an air mass that has a volume between 0.75 and 1.25 times the volume of a sphere having a diameter equal to that of the diffuser tube within the diffuser tube so as to rise through the tube over a given distance to draw water through the diffuser tube from the bottom open end of the diffuser tube; and

boostering the drawn water through the diffuser tube and diffusing the water out of the top end of the tube by supplying successive groups of said individual air bodies from the cylindrical air chamber into the diffuser tube and forming each of said successive groups into a said air mass,

the forming of the air masses consisting of forming the air masses in succession according to the following conditions;

space="preserve" listing-type="equation">0.5L≦

T≦

4L to 6L, when L≧

10 meters (1)

space="preserve" listing-type="equation">0.5≦

T≦

10L, when 2 meters≦

L<

10 meters (2)

L(meters) being a length corresponding to said distance over which the air masses rise through the diffuser tube, and T (seconds) being the time interval between the formation of successive of air masses.

2. A method of using an apparatus as claimed in claim 1 and in which the cylindrical air chamber includes a first cylindrical jacket surrounding the lower peripheral portion so as to define a chamber therebetween, a second cylindrical jacket surounding the first cylindrical jacket, and a cylindrical partition extending between the first and the second cylindrical jackets, the cylindrical partition having aperture extending therethrough at an upper portion thereof, the inner cylindrical jacket having an aperture extending therethrough at a bottom portion thereof,

wherein the step of supplying individual air bodies includes supplying pressurized air between the outer cylindrical jacket and the medium partition which passes through the apertures into the chamber defined between the inner cylindrical jacket and the diffuser tube.

3. A method as claimed in claim 1,

wherein the forming of the air masses is also performed according to the following conditions:

space="preserve" listing-type="equation">5 seconds<

T<

30 seconds when 2 meters<

L<

10 meters (3)

space="preserve" listing-type="equation">15 seconds<

T<

100 seconds when L≧

10 meters. (4)

4. A method as claimed in claim 1,

wherein the disposal of the diffuser tube below the surface of a water source comprises disposing the diffuser tube below the surface of the water source with the top end of the diffuser tube disposed one meter to twenty meters below said surface.