VacFlush adaptor for submersible pumps

Patent metadata

Field	Value
Publication number	US-11352277-B2
Application number	US-202016905186-A
Country	US
Kind code	B2
Filing date	Jun 18, 2020
Priority date	Jun 21, 2019
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

Wastewater treatment systems are disclosed. A wastewater treatment system includes a wastewater conduit disposed in a wastewater treatment vessel, a pump comprising an intake and an outlet connectable to the at least one opening of the wastewater conduit, and an adapter comprising a first end and a second end. The adapter is configured, in a treatment mode, to provide a flow path for wastewater from the wastewater treatment vessel through the adapter and pump to the wastewater conduit. The adapter is further configured to, in a backflush mode, provide a flow path for wastewater through the plurality of nozzles of the wastewater conduit and through the adapter and pump for discharge into the wastewater treatment vessel. Methods of treating wastewater using the system and adapter are disclosed. Methods of retrofitting a wastewater treatment system by providing the adapter are disclosed.

First claim

What is claimed is:

1. A wastewater treatment system, comprising:
a wastewater conduit disposed in a wastewater treatment vessel, the wastewater conduit comprising at least one opening and a plurality of nozzles;
a pump comprising an intake and an outlet, the outlet connectable to the at least one opening of the wastewater conduit; and
an adapter comprising a first end and a second end, the first end comprising a first interface connectable to the intake of the pump, the second end comprising a second interface that, in a treatment mode, is positioned within wastewater within the wastewater vessel to provide a flow path for the wastewater from the wastewater treatment vessel through the adapter and pump to the wastewater conduit, and, in a backflush mode, is configured to be connected to the at least one opening of the wastewater conduit to provide a flow path for wastewater through the plurality of nozzles of the wastewater conduit and through the adapter and pump for discharge into the wastewater treatment vessel.

2. The system of claim 1 , wherein the outlet of the pump comprises an interface substantially identical to the second interface of the adapter.

3. The system of claim 2 , wherein the at least one opening of the wastewater conduit comprises a corresponding interface to the second interface of the adapter.

4. The system of claim 1 , wherein the first end of the adapter is connected to the intake of the pump in the treatment mode and in the backflush mode.

5. The system of claim 4 , wherein the first interface and second interface are disposed at substantially 90° angles relative to each other.

6. The system of claim 1 , further comprising a pump positioning sub-system comprising a rail fixedly secured to a location in the wastewater treatment vessel and a mating feature connectable to a corresponding mating feature on the pump, the pump configured to be positioned along a length of the rail.

7. The system of claim 6 , wherein the rail is aligned vertically.

8. The system of claim 7 , wherein the pump is configured to travel along the vertically aligned rail.

9. The system of claim 8 , wherein the outlet of the pump interfaces with the at least one opening of the wastewater conduit at a lowermost position of the pump on the vertically aligned rail.

10. The system of claim 9 , wherein the second interface of the adapter interfaces with the at least one opening of the wastewater conduit when the pump is disposed above a lowermost position on the vertically aligned rail.

11. A method of treating wastewater in a wastewater treatment system comprising a wastewater conduit disposed in a wastewater treatment vessel with the wastewater conduit connected to an outlet of a pump having an adapter connected to the pump intake, the method comprising:
operating the system in a treatment mode comprising aerating a flow of wastewater through the intake of the pump and providing a flow path for the wastewater from the wastewater treatment vessel through the adapter and pump to a plurality of nozzles of the wastewater conduit; and
operating the system in a backflush mode comprising connecting the adapter to the wastewater conduit and flowing the wastewater through the plurality of nozzles of the wastewater conduit and through the adapter and pump for discharge into the wastewater treatment vessel.

12. The method of claim 11 , wherein operating the system in the backflush mode occurs according to a predetermined schedule.

13. The method of claim 11 , wherein operating the system in the backflush mode is responsive to observing a visual change in a flow pattern in the aerated wastewater visible from the top of the wastewater treatment vessel, the visual change being indicative of increased aeration through a subset of the plurality of nozzles.

14. The method of claim 11 , further comprising stopping operation of the system in the backflush mode after a predetermined period.

15. The method of claim 14 , further comprising returning the system to the treatment mode by reconnecting the outlet of the pump to the wastewater conduit.

Assignees

• Evoqua Water Tech Llc

Inventors

• Norcross Kenneth L

Classifications

• B01F23/454

  by injecting a mixture of liquid and gas · CPC title

• B01F25/21

  with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers · CPC title

• B01F35/13

  using one or more of the components of the mixture to wash-out the mixer · CPC title

• C02F3/223 Primary

  using "air-lift" · CPC title

• B01F2101/305

  Treatment of water, waste water or sewage · CPC title