# US 2008/0185326 A1 · Open-end filter assembly for fluid processing system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0185326 A1 - Document ID: US20080185326A1 - Status: Published application - Kind: A1 - Application number: 11/703,476 - Filed: 2007-02-07 - Published: 2008-08-07 - Earliest claimed: 2007-02-07 - Inventors: Mark Serafin; Stanley R. Ellis; Neal K. Nelson; Richard D. Olmsted - Web page: https://patentgrep.com/patent/US20080185326A1 ## CPC - B01D 29/115: {open-ended, the arrival of the mixture to be filtered and the discharge of the concentrated mixture are situated on both opposite sides of the filtering element} - B01D 29/908: {provoking a tangential stream} - 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) ## Abstract The disclosure is directed to a fluid processing system utilizing an open-end filter assembly to produce a product fluid. The system includes a fluid pump to deliver the raw fluid to a fluid processor and a heat exchanger to control the temperature of the processed fluid. The processed fluid is sent to an open-end filter assembly that allows a first portion of the processed fluid to pass through a filter element. A second portion of the processed fluid does not pass through the filter element and is directed back to the high pressure pump for further processing. In one example, the open-end filter assembly includes an outer cylinder that surrounds a cylindrical filter element to create an outer flow channel and an inner flow channel. Fluid may be introduced to the outer flow channel in a tangential orientation to enhance circular flow around the filter element. ## Claims ### Claim 1 An open-end filter assembly comprising: an inlet; a bypass outlet; an outer flow channel coupled to the inlet and the bypass outlet; an inner flow channel in fluid communication with the outer flow channel via the filter element; and a filtered outlet coupled to the inner flow channel. ### Claim 2 (depends on 1) The open-end filter assembly of claim 1, wherein the filter element is cylindrical, and wherein the outer flow channel and inner flow channel share a central axis. ### Claim 3 (depends on 1) The open-end filter assembly of claim 1, wherein the inlet and bypass outlet are housed within an outer region of a filter head and the filtered outlet is housed within a center region of the filter head. ### Claim 4 (depends on 1) The open-end filter assembly of claim 1, wherein the inner flow channel is defined by the filter element, and wherein the outer flow channel is defined by an outer cylinder and the filter element. ### Claim 5 (depends on 4) The open-end filter assembly of claim 4, wherein the inlet comprises one or more tangential channels formed within the outer cylinder and oriented tangentially to the outer flow channel. ### Claim 6 (depends on 1) The open-end filter assembly of claim 1, further comprising: a connection member that couples the filter element to a filter head, wherein the filter element is configured to fit within an outer cylinder and the filter head is configured to mate with the outer cylinder; and a lockable collar configured to mate with a filter head flange and an outer cylinder flange and seal the filter head to the outer cylinder. ### Claim 7 (depends on 1) The open-end filter assembly of claim 1, wherein the open-end filter is constructed as an encapsulated disposable element. ### Claim 8 A system comprising: a fluid pump; a fluid processor that processes raw fluid from the fluid pump; and an open-end filter assembly that allows a first portion of the fluid to pass through a filter element of the open-end filter assembly and directs a second portion of the fluid to the fluid pump. ### Claim 9 (depends on 8) The system of claim 8, further comprising a heat exchanger that at least one of heats and cools the fluid before the fluid enters the open-end filter assembly. ### Claim 10 (depends on 9) The system of claim 9, wherein the heat exchanger is at least one of a high pressure heat exchanger downstream of a high pressure pump and upstream of the fluid processor and a low pressure heat exchanger downstream of the fluid processor and upstream of the open-end filter assembly. ### Claim 11 (depends on 8) The system of claim 8, further comprising: at least one of an input pressure gauge that measures fluid pressure from the fluid pump, an output pressure gauge that measures fluid pressure of the second portion of the fluid, a flow meter that measures a flow rate of the first portion of the fluid, and a flow meter that measures a flow rate of the second portion of the fluid; and a back pressure regulator that regulates fluid pressure of the second portion of the fluid from the open-end filter assembly. ### Claim 12 (depends on 8) The system of claim 8, wherein the fluid processor is an annular flow processor comprising a first annular flow channel that meets a second annular flow channel opposing the first annular flow channel at an outlet of the fluid processor. ### Claim 13 (depends on 8) The system of claim 8, wherein the open-end filter assembly comprises: an inlet; a bypass outlet; an outer flow channel coupled to the inlet and the bypass outlet; an inner flow channel in fluid communication with the outer flow channel via the filter element; and a filtered outlet coupled to the inner flow channel. ### Claim 14 (depends on 13) The system of claim 13, wherein: the outer flow channel is defined by an outer cylinder and the filter element; and the inlet comprises one or more tangential channels formed through the outer cylinder and oriented tangentially to the outer flow channel. ### Claim 15 (depends on 8) The system of claim 8, wherein the open-end filter assembly comprises a primary open-end filter assembly, the system further comprising a secondary open-end filter assembly arranged in series with the primary open-end filter assembly, wherein the primary open-end filter assembly directs the first portion of fluid to the secondary open-end filter assembly. ### Claim 16 (depends on 8) The system of claim 8, further comprising a valve capable of being configured to prevent the second portion of fluid from flowing through the bypass outlet. ### Claim 17 A method comprising: pumping a fluid to a fluid processor with a fluid pump; processing the fluid with the fluid processor; directing the fluid into an inlet of an open-end filter assembly; directing the fluid through an outer flow channel coupled to the inlet of the open-end filter assembly and a bypass outlet of the open-end filter assembly; passing a first portion of the fluid through a filter element of the open-end filter assembly; directing the first portion of the fluid through a filtered outlet of the open-end filter assembly; and directing a second portion of the fluid through the bypass outlet of the open-end filter assembly and to the fluid pump. ### Claim 18 (depends on 17) The method of claim 17, further comprising controlling the temperature of the fluid before directing the fluid to the open-end filter assembly. ### Claim 19 (depends on 17) The method of claim 17, further comprising: measuring at least one of an input pressure and an input flow rate of the fluid from the fluid pump; measuring at least one of an output pressure and an output flow rate of the second portion of the fluid; and regulating at least one of the output pressure and the output flow rate according to the measured output pressure. ### Claim 20 (depends on 17) The method of claim 17, wherein passing the first portion of the fluid further comprises allowing the first portion of the fluid to pass through the filter element of the open-end filter assembly and into an inner flow channel coupled to the filtered outlet. ### Claim 21 (depends on 17) The method of claim 17, wherein directing the fluid into the open-end filter assembly further comprises injecting the fluid through one or more tangential channels oriented tangentially to the outer flow channel and into the outer flow channel to create circular flow of the fluid within the outer flow channel. ### Claim 22 (depends on 17) The method of claim 17, wherein the open-end filter assembly comprises a primary open-end filter assembly, further comprising: directing the first portion of the fluid to a secondary open-end filter assembly; directing the first portion of the fluid through an outer flow channel of the secondary open-end filter assembly coupled to an inlet of the secondary open-end filter assembly and a bypass outlet of the secondary open-end filter assembly; passing a third portion of the fluid through a filter element of the secondary open-end filter assembly; directing the third portion of the fluid through a filtered outlet of the secondary open-end filter assembly; and directing a fourth portion of the fluid through the bypass outlet of the secondary open-end filter assembly and to the fluid pump. ### Claim 23 (depends on 17) The method of claim 17, further comprising preventing the second portion of fluid from flowing through the bypass outlet.