Air gap eductor and method of making same

Patent metadata

Field	Value
Publication number	US-2022016584-A1
Application number	US-202117371251-A
Country	US
Kind code	A1
Filing date	Jul 9, 2021
Priority date	Jul 17, 2020
Publication date	Jan 20, 2022
Grant date	—

Abstract

An eductor for mixing a diluent with a chemical. The educator includes an eductor body having a nozzle section with an inlet portion and an air gap portion, the inlet portion configured to couple to a diluent source and the air gap portion open to the atmosphere, and a venturi section coupled to the nozzle section. The nozzle section and venturi section may be connected by a swivel joint. The venturi section includes a venturi configured to couple to a chemical source for drawing chemical into the venturi with the flow of diluent through the venturi. A nozzle assembly positioned in the nozzle section of the eductor body. The nozzle assembly is selected from a plurality of nozzle assemblies each configured to be positioned in the nozzle section and operable with the eductor body, and each corresponding to a different volume flow rate through the eductor.

First claim

What is claimed is:

1 . An eductor for mixing a diluent with a chemical, comprising:
an eductor body, comprising:
a nozzle section having an inlet portion and an air gap portion, the inlet portion configured to couple to a diluent source and the air gap portion open to the atmosphere; and
a venturi section coupled to the nozzle section, the venturi section including a venturi configured to couple to a chemical source for drawing chemical into the venturi with the flow of diluent through the venturi; and
a nozzle assembly positioned in the nozzle section of the eductor body, wherein the nozzle assembly is selected from a plurality of nozzle assemblies each configured to be positioned in the nozzle section and operable with the eductor body, and wherein each of the plurality of nozzle assemblies corresponds to a different volume flow rate through the eductor.

2 . The eductor of claim 1 , wherein the nozzle section and the venturi section of the eductor body are coupled by a swivel joint.

3 . The eductor of claim 1 , wherein at least one of the nozzle section and the venturi section is formed as a unitary body.

4 . The eductor of claim 1 , wherein the nozzle assembly comprises:
a nozzle defining a nozzle outlet; and a flow stabilizer positioned in the nozzle and configured to collimate the diluent.

5 . The eductor of claim 4 , wherein the flow stabilizer includes a screen assembly comprising a stacked arrangement of screens.

6 . The eductor of claim 1 , further comprising a flood ring coupled to the venturi section of the eductor body.

7 . The eductor of claim 1 , wherein the venturi section comprises:
a main body having a primary passageway; a venturi body disposed in the primary passageway and including the venturi, wherein a flow path through the venturi section includes a first flow path through a venturi passageway in the venturi and a second flow path through a bypass passageway around the venturi body.

8 . The eductor of claim 1 , further comprising a single discharge tube extending from the venturi section of the eductor body.

9 . An air gap eductor system, comprising:
the eductor of claim 1 ; and the plurality of nozzle assemblies, each being positionable in the nozzle section and operable with the eductor body, and each corresponding to a different volume flow rate through the eductor.

10 . The air gap eductor system of claim 9 , wherein each of the plurality of nozzle assemblies is color coded to reflect a specified flow rate.

11 . A method of manufacturing an air gap eductor, comprising:
providing a nozzle section including an inlet portion and an air gap portion, the inlet portion configured to couple to a diluent source and the air gap portion open to the atmosphere; providing a venturi section including a venturi configured to couple to a chemical source for drawing chemical into the venturi with the flow of diluent through the venturi; and connecting the nozzle section and the venturi section at a swivel joint to form an eductor body.

12 . The method of claim 11 , wherein providing the nozzle section further comprises moulding the nozzle section as a unitary body.

13 . The method of claim 11 , wherein providing the venturi section further comprises moulding the venturi section as a unitary body.

14 . The method of claim 11 , further comprising inserting a flood ring into the venturi section of the eductor body.

15 . The method of claim 11 , further comprising:
selecting a nozzle assembly from a plurality of nozzle assemblies, each of the plurality of nozzle assemblies configured to have a different flow rate; and connecting the selected nozzle assembly to the nozzle section of the eductor body.

16 . The method of claim 15 , further comprising connecting a flow stabilizer to the nozzle assembly, the flow stabilizer configured to collimate the diluent.

Assignees

• Capital Formation Inc

Inventors

• Dalhart Mark

Classifications

• B01F2025/917

  Laminar or parallel flow, i.e. every point of the flow moves in layers which do not intermix · CPC title

• B01F2025/911

  Axial flow · CPC title

• B01F25/31252

  Nozzles · CPC title

• B01F25/31243 Primary

  Eductor or eductor-type venturi, i.e. the main flow being injected through the venturi with high speed in the form of a jet · CPC title

• B01F2025/9171

  Parallel flow, i.e. every point of the flow moves in parallel layers where intermixing can occur by diffusion or which do not intermix; Focusing, i.e. compressing parallel layers without intermixing them · CPC title