# US 2014/0196795 A1 · Eductor pump and replaceable wear inserts and nozzles for use therewith

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- Number: US 2014/0196795 A1
- Document ID: US20140196795A1
- Status: Published application
- Kind: A1
- Application number: 13/739,784
- Filed: 2013-01-11
- Published: 2014-07-17
- Earliest claimed: 2013-01-11
- Assignees: ALSTOM Technology Ltd
- Applicants: ALSTOM Technology Ltd.
- Inventors: Harvey Kent Dunning
- Web page: https://patentgrep.com/patent/US20140196795A1

## CPC

- F04F 5/44: Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F 5/00: Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow (diffusion pumps F04F9/00; combination of jet pumps with pumps of other than jet type F04B; use of jet pumps for priming or boosting non-positive-displacement pumps F04D)
- B01F 25/30: Injector mixers (mixing by creating vortex flow B01F25/10)
- B01F 25/3125: {characteristics of the Venturi parts}
- B01F 25/31251: {Throats}
- B01F 25/31252: {Nozzles}
- B01F 25/31253: {Discharge}
- F04F 5/24: displacing liquids, e.g. containing solids, or liquids and elastic fluids
- Y10T 137/0441: Repairing, securing, replacing, or servicing pipe joint, valve, or tank
- Y10T 137/87652: With means to promote mixing or combining of plural fluids
- F04F: PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED {(evacuating by sorption F04B)}; SIPHONS {(conveying materials in bulk by flows of gas, liquid of foam B65G53/00)}
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An eductor for conveying materials includes a body defining a first end and a second end and having a first inlet proximate the first end and a body outlet proximate the second end, the body defining a second inlet positioned between the first inlet and the body outlet, and the body defining an interior area. The eductor includes one or more inserts disposed within the body. The insert or inserts are manufactured from an abrasion resistant material.

## Claims

### Claim 1

An eductor for conveying materials comprising:
a body comprising a pressure boundary, the body defining a first end and a second end and having a first inlet proximate the first end and a body outlet proximate the second end, the body defining a second inlet positioned between the first inlet and the body outlet, and the body defining a first interior area which extends between first inlet, the second inlet and the body outlet; and
at least on insert disposed with in the body, said at least one insert being formed of an abrasion resistant material.

### Claim 2 (depends on 1)

The eductor of claim 1 wherein the at least one insert includes at least one of:
a mixing chamber insert positioned in the interior area, proximate the first inlet and extending downstream thereof, the mixing chamber insert defining a second interior area that is in communication with the first inlet, the second inlet and the body outlet;
a motive fluid nozzle positioned in the first inlet and extended at least partially into the mixing chamber insert;
a feeder conduit insert positioned in the second inlet, the feeder conduit insert defining a third interior area that is in communication with the second interior area;
a venturi outlet insert positioned in the body outlet; and
a venturi inlet insert positioned in the first interior area and having one end positioned proximate the mixing chamber insert.

### Claim 3 (depends on 1)

The eductor of claim 1 wherein the at least one of the at least one inserts is removable from the eductor.

### Claim 4 (depends on 1)

The eductor of claim 1, wherein the abrasion resistant material is a wear resistant, heat treated white iron.

### Claim 5 (depends on 1)

The eductor of claim 1, wherein at least one of the mixing chamber insert, the motive fluid nozzle, the feeder conduit insert, the venturi outlet insert and the venturi inlet insert defines a mounting portion removably secured to the body and at least one free end that is movable relative to the mounting portion to accommodate thermal expansion and contraction in response to changes in temperature.

### Claim 6 (depends on 1)

The eductor of claim 1, wherein the mixing chamber insert has a first bore extending therethrough and the venturi inlet insert has a second bore extending therethrough.

### Claim 7 (depends on 6)

The eductor of claim 6, comprising a differential pressure sensor having one side in communication with the first bore and an opposing side in communication with the second bore for measuring differential pressure between the second interior area and a fourth interior area defined by the venturi inlet insert.

### Claim 8 (depends on 1)

The eductor of claim 1, wherein the body comprises at least a first body portion separate from a second body portion.

### Claim 9 (depends on 1)

The eductor of claim 1, wherein the first body portion and the second body portion are removably secured to one another.

### Claim 10 (depends on 8)

The eductor of claim 8, wherein the mounting portion of the mixing chamber insert is removably secured to a portion of the first body portion proximate to the venturi inlet insert.

### Claim 11 (depends on 8)

The eductor of claim 8, wherein the mounting portion of the venturi inlet insert is removably secured to a portion of the second body portion proximate to the mixing chamber insert.

### Claim 12 (depends on 8)

The eductor of claim 8, wherein the mounting portion of the venturi outlet insert is removably secured to the second body portion proximate to the body outlet.

### Claim 13 (depends on 8)

The eductor of claim 8, wherein the mounting portion of the motive fluid nozzle is removably secured to the first body portion proximate to the first inlet.

### Claim 14 (depends on 8)

The eductor of claim 8, wherein the mounting portion of the feeder conduit insert is removably secured to the first body portion proximate to the second inlet.

### Claim 15 (depends on 1)

The eductor of claim 1, wherein the feeder conduit insert extends partially into second interior area of the mixing chamber insert.

### Claim 16 (depends on 1)

The eductor of claim 1, wherein the body is manufactured from a cast material.

### Claim 17 (depends on 16)

The eductor of claim 16, wherein the first interior area of the body has a contour complementary to exterior surfaces of the mixing chamber insert, the motive fluid nozzle, the feeder conduit insert, the venturi outlet insert and the venturi inlet insert.

### Claim 18 (depends on 1)

The eductor of claim 1, wherein the body comprises at least two pipe sections.

### Claim 19 (depends on 18)

The eductor of claim 18, wherein the at least one of the at least two pipe sections defines an interior pipe surface that is spaced apart from exterior surfaces of the venturi outlet insert and the venturi inlet insert.

### Claim 20 (depends on 19)

The eductor of claim 19, comprising an annular spacer having an exterior surface which engages the interior pipe surface, the annular spacer having an interior support surface which engages the exterior surface of the venturi outlet insert so that the venturi outlet insert and the venturi inlet insert are supported centrally in the at least one of the at least two pipe sections.

### Claim 21

A method of refurbishing a worn eductor comprising:
removing at least one of a mixing chamber insert, a motive fluid nozzle, a feeder conduit insert, a venturi outlet insert and a venturi inlet insert from the eductor; and
installing at least one of a removable abrasion resistant mixing chamber insert, motive fluid nozzle, feeder conduit insert, venturi outlet insert and venturi inlet insert into the eductor.

### Claim 22

An eductor for conveying materials comprising:
a body comprising a pressure boundary, the body defining a first end and a second end and having a first inlet proximate the first end and a body outlet proximate the second end, the body defining a second inlet positioned between the first inlet and the body outlet, and the body defining a first interior area which extends between first inlet, the second inlet and the body outlet;
a mixing chamber insert positioned in the interior area, proximate the first inlet and extending downstream thereof, the mixing chamber insert defining a second interior area that is in communication with the first inlet, the second inlet and the body outlet, the mixing chamber insert manufactured from an abrasion resistant material;
a motive fluid nozzle positioned in the first inlet and extended at least partially into the mixing chamber insert, the motive fluid nozzle manufactured from an abrasion resistant material;
a feeder conduit insert positioned in the second inlet, the feeder conduit insert defining a third interior area that is in communication with the second interior area, feeder conduit insert manufactured from an abrasion resistant material;
a venturi outlet insert positioned in the body outlet, venturi outlet insert manufactured from an abrasion resistant material; and
a venturi inlet insert positioned in the first interior area and having one end positioned proximate the mixing chamber insert, venturi inlet insert manufactured from an abrasion resistant material.