Mixing, aeration or oxygenating method and apparatus

• US 6,787,045 B1
• Filed: 08/31/2001
• Issued: 09/07/2004
• Est. Priority Date: 03/05/1999
• Status: Expired due to Term

• Current Assignee: Oʼhara, Kenneth
• Original Assignee: Oʼhara, Kenneth
• Inventors: OʼHara, Kenneth
• Primary Examiner(s): Barry, Chester T.
• Application Number:
  US09/914,706
• Time in Patent Office: 1,103 Days
• Field of Search: 210/739, 210/97, 210/136, 210/150, 210/194, 210/221.2
• US Class Current: 210/739
• CPC Class Codes: B01F 23/23121 having injection means, e.g. nozzles with circumferential outlet
• CPC Class Codes: B01F 23/237611 Air
• CPC Class Codes: B01F 23/237612 Oxygen
• CPC Class Codes: B01F 35/20 Measuring; Control or regulation
• CPC Class Codes: B01F 35/2213 Pressure
• CPC Class Codes: C02F 3/201 Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
• CPC Class Codes: C02F 7/00 Aeration of stretches of water
• CPC Class Codes: G05D 7/012 the sensing element being deformable and acting as a valve
• CPC Class Codes: Y02W 10/10 Biological treatment of water, waste water, or sewage

Abstract

A mixing, aerating or oxygenating method and apparatus to aerate or oxygenate ponds, rivers or lakes, sewage or effluent treatment lagoons or beds or to airstrip volatile compounds from water or other solutes by distributing gas through a piped system having a plurality of outlets (4) branching from a common distribution line (2). In order to deliver a desired quantity of air or oxygen at each outlet, a constant flow regulator (5) is disposed in each outlet which limits the flow to a set amount when the pressure in the pipe system exceeds a predetermined minimum value. In one method, the regulator is chosen to achieve this irrespective of pressure drop along the distribution line. In another method, the regulator is chosen to give the desired output with no pressure drop along the distribution line.

Claims

1. A method of mixing, aerating or oxygenating ponds, rivers or lakes, sewage/treatment lagoons or effluent beds or air striping volatile compounds from water or other solutes, the method comprising the steps of:

(a) providing a pipe system having a plurality of outlets branching from a common distribution line;

(b) continuously providing a predetermined minimum volume of a gas comprising oxygen and introducing the gas into the pipe system; and

(c) delivering a desired constant quantity of the gas at each of the outlets by providing a moving element constant flow regulator means for each outlet which limits gas flow from each of the outlets to a constant amount when pressure in the pipe system exceeds a predetermined minimum value.

2. A method an claimed in claim 1 in which the predetermined minimum volume of gas exceeds a calculated minimum volume which is required to be delivered from the outlets.

3. A method as claimed in claim 1 in which substantially the same quantity of gas is delivered at each outlet irrespective of pressure drop along the pipe system.

4. A method as claimed in claim 1 in which gas pressure is kept substantially constant along the distribution line and each constant flow regulator means is a moving “

0”

ring constant flow regulator.

5. A method as claimed in claim 1, wherein the gas is air.

6. A mixing, aeration or oxygenating system to aerate or oxygenate ponds, rivers, or lakes, sewage or effluent treatment lagoons or beds or to airstrip volatile compounds from water or other solutes and comprising:

(a) a pipe system having a plurality of outlets branching from a gas distribution supply line;

(b) a source of pressurized gas comprising oxygen connected to the distribution supply line; and

(c) an “

O”

ring moving element constant flow regulator for each outlet to cause a desired constant flow of gas to be delivered through the outlets when pressure in the pipe system exceeds a predetermined minimum value, each regulator in designed to only allow a desired maximum flow of gas to pass through at a known pressure of gas.

7. A system as claimed in claim 6 in which the source of pressurized gas in adapted to supply a predetermined minimum volume of gas, which volume is calculated to exceed a minimum volume which in to be delivered from all the outlets.

8. A system as claimed in claim 6 in which each regulator is tuned to deliver a desired calculated supply of gas required at each outlet irrespective of changes in supply pressure such that the regulator is self compensating for changes in supply pressure within a designed operating range of the regulator.

9. A system as claimed in claim 6 in which each outlet has a suitable outlet nozzle.

10. A system as claimed in claim 6 in which the outlets are disposed in series along the distribution supply line.

11. A system as claimed in claim 6 in which the source of pressurized gas is a pump which delivers a constant volume of gas.

12. A system as claimed in claim 6 in which the distribution supply line comprises at least one length of pipe.

13. A system as claimed in claim 6 in which the distribution supply line comprises a plurality of lengths of pipe branching from a common manifold.

14. A system as claimed in claim 6 in which the distribution supply line comprises a plurality of lengths of pipe having a direct connection with the source of pressurized gas.

15. A system as claimed in claim 6 in which the distribution supply line includes a return line.

16. A system as claimed in claim 6 in which the distribution supply line is of a ring main type.

17. A system as claimed in claim 6 in which the outlets incorporate a backflow regulation device and an isolation ball valve.

18. A system as claimed in claim 6 in which the outlets incorporate a backflow regulation device.

19. A system as claimed in claim 6 in which the outlets incorporate an isolation ball valve.

20. A system as claimed in claim 6, wherein the pressurized gas is air.