# US 10,309,426 B2 · Fluid exchanger devices, pressure exchangers, and related methods

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,309,426 B2
- Document ID: US10309426B2
- Status: Granted
- Kind: B2
- Application number: 15/257,591
- Filed: 2016-09-06
- Published: 2016-12-29
- Granted: 2019-06-04
- Earliest claimed: 2012-08-16
- Assignees: Flowserve Management Company
- Applicants: Flowserve Management Company
- Inventors: Daniela Lehner; Andrew Schevets; Andreas Dreiss
- Web page: https://patentgrep.com/patent/US10309426B2

## CPC

- F15B 3/00: Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids {(fluid-driven pumps F04B9/08)}
- B01D 61/06: Energy recovery
- B01D 61/10: Accessories; Auxiliary operations
- F04F 13/00: Pressure exchangers
- C02F 1/441: {by reverse osmosis}
- C02F 2303/10: Energy recovery
- Y10T 137/0396: Involving pressure control
- Y10T 137/86638: Rotary valve
- F15B: SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- 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)}
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Exchanger devices include a plurality of fixed exchange ducts and a rotating valve assembly for directing flow to and from the plurality of exchange ducts. Methods of exchanging pressure between fluid streams may include directing fluids through an exchange device and pressurizing a fluid in the plurality of exchange ducts of the exchanger device.

## Claims

### Claim 1

A method of exchanging pressure between fluid streams, the method comprising:
supplying a relatively high-pressure fluid into a first port formed in a first end of a housing of a pressure exchanger;
supplying a relatively low-pressure fluid into a second port formed in a second, opposing end of the housing of the pressure exchanger;
rotating a valve element including a first valve positioned on a first end of a plurality of stationary ducts extending along a longitudinal axis of the pressure exchanger and a second valve positioned on a second, opposing end of the plurality of stationary ducts about the plurality of stationary ducts, wherein each of the first valve and the second valve further comprises an axial port at least partially extending along the longitudinal axis of the housing, each axial port being in communication with an associated port formed in the housing extending in a direction along the longitudinal axis of the housing;
transferring the relatively high-pressure fluid from the first port and into at least one duct of the plurality of stationary ducts with the first valve;
transferring the relatively low-pressure fluid from the second port and into at least one duct of the plurality of stationary ducts with the second valve;
pressurizing the relatively low-pressure fluid with the relatively high-pressure fluid to form a pressurized fluid and a spent fluid;
transferring the pressurized fluid from the at least one duct of the plurality of stationary ducts with the second valve and outputting the pressurized fluid from the pressure exchanger through a third port formed in the second end of the housing; and
transferring the spent fluid from the at least one duct of the plurality of stationary ducts with the first valve and outputting the spent fluid from the pressure exchanger through a fourth port formed in the first end of the housing.

### Claim 2 (depends on 1)

The method of claim 1, wherein:
supplying a relatively high-pressure fluid comprises transferring a super saline solution into the pressure exchanger from a reverse osmosis device; and
supplying a relatively low-pressure fluid comprises transferring a saline solution into the pressure exchanger.

### Claim 3 (depends on 1)

The method of claim 1, wherein supplying a relatively high-pressure fluid, supplying a relatively low-pressure, transferring the pressurized fluid, and transferring the spent fluid occur substantially simultaneously.

### Claim 4 (depends on 1)

The method of claim 1, further comprising offsetting the occurrence of the supply of the relatively high-pressure fluid into a duct of the plurality of ducts and the occurrence of the transfer of the pressurized fluid from the same duct of the plurality of ducts with an angular offset formed between the first valve and the second valve.

### Claim 5 (depends on 1)

The method of claim 1, wherein transferring the relatively high-pressure fluid from the first port and into at least one duct of the plurality of stationary ducts with the first valve comprises directing the relatively high-pressure fluid through the axial port formed in the first valve in a direction along the longitudinal axis of the pressure exchanger and wherein transferring the relatively low-pressure fluid from the second port and into at least one duct of the plurality of stationary ducts with the second valve comprises directing the relatively low-pressure fluid through two radial ports formed in the second valve in a direction at least partially transverse to the longitudinal axis of the pressure exchanger.

### Claim 6 (depends on 1)

The method of claim 1, wherein transferring the relatively high-pressure fluid from the first port and into at least one duct of the plurality of stationary ducts with the first valve comprises directing the relatively high-pressure fluid through two radial ports formed in the second valve in a direction at least partially transverse to the longitudinal axis of the pressure exchanger and wherein transferring the relatively low-pressure fluid from the second port and into at least one duct of the plurality of stationary ducts with the second valve comprises directing the relatively low-pressure fluid through the axial port formed in the first valve in a direction along the longitudinal axis of the pressure exchanger.

### Claim 7 (depends on 6)

The method of claim 6, wherein transferring the pressurized fluid from the at least one duct of the plurality of stationary ducts with the second valve comprises directing the pressurized fluid through the axial port formed in the second valve in a direction along the longitudinal axis of the pressure exchanger.

### Claim 8 (depends on 7)

The method of claim 7, wherein transferring the spent fluid from the at least one duct of the plurality of stationary ducts with the first valve comprises directing the relatively spent fluid through two radial ports formed in the first valve.

### Claim 9 (depends on 1)

The method of claim 1, further comprising forming an axial seal between the first valve and the first end of the plurality of stationary ducts and the second valve and the second end of the plurality of stationary ducts while rotating the valve element.

### Claim 10 (depends on 1)

A method of exchanging pressure between fluid streams, the method comprising:
supplying a relatively high-pressure super saline solution into the pressure exchanger of claim 1 from a reverse osmosis device through a first port in a first end of the housing;
supplying a relatively low-pressure saline solution into the pressure exchanger through a second port in a second, opposing end of the housing;
pressurizing the relatively low-pressure saline solution with the relatively high-pressure super saline solution to form a pressurized saline solution and a spent super saline solution;
transferring the pressurized saline solution from the pressure exchanger through a third port formed in the second end of the housing; and
transferring the spent super saline solution from the pressure exchanger through a fourth port formed in the first end of the housing.