GB2392855A - Filter cleaning device - Google Patents

Filter cleaning device Download PDF

Info

Publication number
GB2392855A
GB2392855A GB0309723A GB0309723A GB2392855A GB 2392855 A GB2392855 A GB 2392855A GB 0309723 A GB0309723 A GB 0309723A GB 0309723 A GB0309723 A GB 0309723A GB 2392855 A GB2392855 A GB 2392855A
Authority
GB
United Kingdom
Prior art keywords
spray
cfs
cleaning
filter
solids
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0309723A
Other versions
GB2392855B (en
Inventor
Richard Victor Johnson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB0221277A external-priority patent/GB0221277D0/en
Priority claimed from GB0301624A external-priority patent/GB0301624D0/en
Application filed by Individual filed Critical Individual
Publication of GB2392855A publication Critical patent/GB2392855A/en
Application granted granted Critical
Publication of GB2392855B publication Critical patent/GB2392855B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6438—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles
    • B01D29/6446—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element nozzles with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
    • B01D29/682—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with a rotary movement with respect to the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/58—Power supply means for regenerating the filter
    • B01D2201/583—Power supply means for regenerating the filter using the kinetic energy of the fluid circulating in the filtering device

Abstract

A filter for removing solids from a fluid 10, comprises a filter body 11 having a connecting filtering 14 and cleaning section 16, a cylindrical filter screen 13 movable along a longitudinal axis 15 between the filtering and cleaning section and a spray (21, Fig 3) located in the cleaning section to blow entrapped solids from the filter when position in the cleaning section. Preferably the spray is fixed or rotary and is positioned to clean an inner or outer surface of the filter screen. Optionally, there are a series of sprays which generate a tangential force on the surface of the filter causing filter rotation during cleaning. Removed solids may be collected in a demountable solids retention area 17. Preferably, unfiltered liquid passes from the outside to the inside of the filter screen, allowing filtrate to pass to the filter outlet 12 while collected solids (24, Fig 3) gather on the outside filter screen face. When gathered solids block the filter screen, flow through the filter may be suspended and the filter screen positioned in the cleaning section to enable the cleaning process to commence. Preferably the rotary spray is stopped before the cleaned filter screen is returned to the filtering section.

Description

1. FILTER FOR THE REMOVAL OF SUSPENDED SOLIDS FROM A LIQUID OR GAS
This invention relates to a new form of filter for the removal of suspended solids from a liquid or gas. With the proposed invention the liquid or gas containing solids is induced through the filter body, by any means, which will ensure that it can only reach the outlet by passing through a cylindrical filter screen (CFS). This screen can be manufactured from any material that is compatible with the substances being filtered and will allow the liquid/gas to pass through, while entrapping all, or a reasonable percentage of, the solids which are suspended in the liquid/gas at the inlet. It will have sufficient mechanical strength to withstand the cleaning operation. Filters operating in this manner are currently available. The body of the filter will have two sections. One, where the liquid/gas containing solids flows through and a second cleaning section where the solids which have become entrapped by the CFS can be removed and retained without recontamination of the liquid/gas. The CFS will be able to move between the two sections along its longitudinal axis. As the CFS moves into the second (cleaning) section it passes by a spray which blows off the solids, which have become entrapped on its surface. This cleaning section is designed to contain the products of the cleaning spray and removed solids and allow the spray media to escape while retaining the removed solids for subsequent disposal. It may be demountable to facilitate disposal. A suitable arrangement of the proposed filter is shown in Fig. 1 & 2.
In operation the CFS will remain in its filtering position (i.e. in the normal liquid/gas flow) until it is considered to be sufficiently blocked. At this stage the cleaning cycle will be commenced as follows. OPTION ONE. Cleaning by rotary spray The rotary spray is fixed in a position in the cleaning section and inside the circumference of the CFS when it moves to the cleaning section. The mechanical operation of this spray can be by any suitable means and it can spray any substance at a pressure and spray pattern that is best suited to the cleaning operation. A suitable design for this rotary spray is shown in Fig. 3.
CLEANING SEQUENCE
1. Flow through the filter is suspended 2. The rotary spray is activated 3. The CFS is moved, by any means, longitudinally out of the normal flow into the cleaning section. The solids entrapped on its surface are blown off in one circular plane as it passes the rotary spray. The speed of passing is controlled to give the best cleaning of the CFS.
This process is shown in Fig. 2.
4. The CFS is moved (by any means) back into its filtering position. The spray may be stopped during this operation or be left running so that the CFS passes by it again.
5. Steps 3 and 4 may be repeated.
6. The spray is stopped (if not already stopped) and flow through the filter is resumed.
7. The solids collected will be retained for subsequent disposal.
OPTION TWO,THREE & FOUR
In these three options the CFS can rotate about its longitudinal axis.
CLEANING SEQUENCE
OPTION TWO
1. Flow through the filter is suspended.
2. A spray is activated which is located in a fixed position in the cleaning section. It can be either inside or outside the circumference of the CFS when it moves to the cleaning section and will generate a jet in a tangential direction relative to the CFS wall. The discharge angle of the spray relative to a true tangent of the cylinder can vary to give the best combination of cleaning and rotation. These two possible positions are shown in Fig 2 & 4. It will spray any substance at a pressure and spray pattern that is best suited to the cleaning operation.
3. The CFS is moved, by any means, longitudinally out of the normal flow into the cleaning section and the solids entrapped on its surface are blown off in one direction as it passes the fixed spray. The force generated on the circumference of the CFS by the spray will cause it to rotate so that all of its surface will pass by the spray and be cleaned. The speed of passing is controlled to give the best cleaning of the CFS. This process is shown in Fig. 2 & Fig.4 4. The CFS is moved, by any means, back into its filtering position. The spray may be stopped during this operation or may be left in operation so that the CFS passes by it again.
5. Steps 3 and 4 may be repeated.
6. The spray is stopped (if not already stopped) and flow through the filter is resumed.
7. The solids collected will be retained for subsequent disposal.
OPTION THREE
1. Flow through the filter is suspended.
2. A spray is activated which is located in a fixed position in the cleaning section and inside the circumference of the CFS when it moves into the cleaning section. The location and discharge angle of this spray will be to give the best combination of removal and collection of solids from the surface of the CFS. It will spray any substance at a pressure and spray pattern that is best suited to this operation.
3. The CFS is moved, by any means, longitudinally out of the normal flow into the cleaning section and in doing so passes by the fixed spray. As it moves longitudinally it is also caused, by any means, to rotate so that all of its surfaces pass by the spray and are cleaned. The spray blows solids trapped on the surface of the CFS in one direction. The speed of passing is controlled to give the best cleaning of the CFS. This process is shown in Fig. 5.
4. The CFS is moved, by any means, back into its filtering position. The spray may be stopped during this operation or may be left in operation so that the CFS passes by it again.
5. Steps 3 and 4 may be repeated.
6. The spray is stopped (if not already stopped) and flow through the filter is resumed.
7. The solids collected will be retained for subsequent disposal.
OPTION FOUR
1. Flow through the filter is suspended.
2. The CFS is moved, by any means, longitudinally out of the normal flow into the cleaning section. 3. When the CFS is fully in the cleaning section a spray, or series of sprays, is activated, which is located in a fixed position in the cleaning section. This jet(s) will have a flat fan shape to cover the full length of the CFS. It can be either inside our outside the circumference of the CFS when it is in the cleaning section and will generate a jet(s) in a tangential direction relative to the CFS wall. The discharge angle of the spray relative to a true tangent of the cylinder can vary to give the best combination of cleaning and rotation. These two possible
3. positions are shown in Fig. 6. It will spray any substance at a pressure and spray pattern that is best suited to the cleaning operation. The spray blows entrapped solids from the surface of the CFS in one plane. The tangential force of the spray(s) on the wall of the CFS causes it to rotate so that all of its surfaces will pass by the spray(s) and be cleaned. This process is shown in Fig.6.
4. The spray is stopped and the CFS moved, by any means, back into its filtering position.
5. Steps 2, 3 and 4 may be repeated.
6. Flow through the filter is resumed.
7. The solids collected will be retained for subsequent disposal.
Referring to the drawing, liquid or gas with suspended solids 10 is induced into the filter body 11 and can only reach the outlet 12 by passing through a cylindrical filter screen (CFS) 13. The CFS is normally located in the normal liquid/gas flow 14, but can be moved along its longitudinal axis 15 into the cleaning section 16. This cleaning section has a solids retention area 17. To achieve this, in Fig. 1 there is a fixed sleeve 18, a moving sleeve 19 and seal 20.
Fig.1 shows the general arrangement with the CFS in the normal flow position. Fig. 2 shows the CFS in the cleaning section.
Cleaning is achieved in any of four ways ONE By a rotary spray 21 which in this example has circumferential cleaning spray(s) 22 and tangential spray(s) 23 to promote rotation. Solids 24 are blown off radially in one circular plane. This action is shown in Fig.2 & Fig. 3 TWO By a fixed spray inside 25 or outside 26 the circumference of the CFS. The angle of these sprays 27 relative to a true tangent can vary to suit the best results. Solids 24 are blown off in one direction. This action is shown in Fig. 2 & Fig. 4 THREE By a fixed spray 28 inside the circumference of the CFS. The angle 29 of this spray can vary to suit the best results. Solids 24 are blown off in one direction. In this example angled vanes 30 inside the feed pipe cause longitudinal and radial movement. This action is shown in Fig 5.
FOUR By a fixed spray or sprays inside 31 or outside 32 the circumference of the CFS. The angle of these sprays 33 relative to a true tangent can vary to suit the best results. Solids 24 are blown off in one plane. In this example, longitudinal movement of the CFS and delayed feed to the spray(s) are effected by a disc 34 fixed to a spindle of the CFS. This action is shown in Fig. 6.

Claims (5)

1. A filter for the removal of suspended solids from a liquid or gas which comprises of a body with inter-connecting normal flow and cleaning sections, a cylindrical filter screen (CFS) which can move along its longitudinal axis between the two sections and a spray(s) located in the cleaning section which blows solids entrapped in the normal flow position from the CFS as it passes by.
2. A filter as described in 1. where in the cleaning cycle the CFS, while moving between the normal flow and cleaning sections, passes by a rotary spray located in the cleaning section and inside the circumference of the CFS, which blows entrapped solids from the surface of the CFS in one circular plane.
3. A filter as described in 1. where the CFSis free to rotate and, in the cleaning cycle while moving between the normal flow and cleaning sections, passes by a fixed spray located in the cleaning section either inside or outside the circumference of the CFS. This spray is directed in a tangential direction relative to the CFS wall and blows solids from its surface in one direction.
The tangential force of the spray on the wall of the CFS causes it to rotate so that all of its surfaces pass by the spray.
4. A filter as described in 1. where, in the cleaning cycle the CFS, while moving between the normal flow and cleaning sections, is caused to rotate as it moves. It passes by a fixed spray located in the cleaning section and inside the circumference of the CFS which blows solids from the surface of the CFS in one direction. As the CFS rotates as it moved longitudinally, all of its surfaces pass by the spray.
5. A filter as described in 1. where the CFSis free to rotate and in a cleaning cycle moves fully into the cleaning section wherein a spray, or series of sprays, is activated which is located in the cleaning section either inside or outside the circumference of the CFS wherein the spray(s) is flat fan shaped to cover the full length of the CFS and is directed in a tangential direction relative to its wall and the spray(s) blows entrapped solids from the surface of the CFS in one plane wherein the tangential force of the spray(s) on the wall of the CFS causes it to rotate so that all of its surfaces pass by the spray(s).
i
5. A filter as described in 1. where the CFSis free to rotate and in the cleaning cycle moves fully into the cleaning section. Once there a spray, or series of sprays, is activated which is located in the cleaning section either inside or outside the circumference of the CFS. This spray is flat fan shaped to cover the full length of the CFS and is directed in a tangential direction relative to its wall. The spray(s) blows entrapped solids from the surface of the CFS in one plane. The tangential force of the spray(s) on the wall of the CFS causes it to rotate so that all of its surfaces pass by the spray(s).
Amendments to the claims have been filed as follows: 1. A filter for the removal of suspended solids from a liquid or gas which comprises of a body with inter-connecting normal flow and cleaning sections, a cylindrical filter screen (CFS) which can move along its longitudinal axis between the two sections and a spray(s) located in the cleaning section which blows solids entrapped in the normal flow position from the CFS as it passes by.
2. A filter as described in 1. where in a cleaning cycle the CFS, while moving between the normal flow and cleaning sections, passes by the spray, which is a rotary spray, located in the cleaning section and inside the circumference of the CFS, which blows entrapped solids from the surface of the CFS in one circular plane.
3. A filter as described in 1. where the CFSis free to rotate and, in a cleaning cycle while moving between the normal flow and cleaning sections, passes by the spray, which is a fixed spray, located in the cleaning section either inside or outside the circumference of the CFS wherein the spray is directed in a tangential direction relative to the CFS wall and blows solids from its surface in one direction wherein the tangential force of the spray on the wall of the CFS causes it to rotate so that all of its surfaces pass by the spray.
4. A filter as described in 1. where, in a cleaning cycle the CFSis caused to rotate while moving between the normal flow and cleaning sections and passes by the spray which is a fixed spray located in the cleaning section and inside the circumference of the CFS wherein the spray is directed in a radial direction relative to the CFS wall and blows solids from its surface in one direction and as the CFS rotates as it moves longitudinally, all of its surfaces pass by the spray.
GB0309723A 2002-09-13 2003-04-29 Filter for the removal of suspended solids from a liquid or gas Expired - Fee Related GB2392855B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0221277A GB0221277D0 (en) 2002-09-13 2002-09-13 Filter for the removal of solids from a liquid
GB0301624A GB0301624D0 (en) 2003-01-24 2003-01-24 Filter for the removal of solids from a liquid or gas

Publications (2)

Publication Number Publication Date
GB2392855A true GB2392855A (en) 2004-03-17
GB2392855B GB2392855B (en) 2004-08-18

Family

ID=31889684

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0309723A Expired - Fee Related GB2392855B (en) 2002-09-13 2003-04-29 Filter for the removal of suspended solids from a liquid or gas

Country Status (1)

Country Link
GB (1) GB2392855B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1457246A1 (en) * 2003-03-13 2004-09-15 DIOSNA Dierks & Söhne GmbH Device for processing pulverous materials
CN107529445A (en) * 2017-08-25 2018-01-02 广东溢达纺织有限公司 Filtering net cleaning device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256599A (en) * 1991-06-06 1992-12-16 Beaudrey & Cie Filter with rotary washing arms

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256599A (en) * 1991-06-06 1992-12-16 Beaudrey & Cie Filter with rotary washing arms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1457246A1 (en) * 2003-03-13 2004-09-15 DIOSNA Dierks & Söhne GmbH Device for processing pulverous materials
CN107529445A (en) * 2017-08-25 2018-01-02 广东溢达纺织有限公司 Filtering net cleaning device
CN107529445B (en) * 2017-08-25 2023-11-28 广东溢达纺织有限公司 Filter screen cleaning device

Also Published As

Publication number Publication date
GB2392855B (en) 2004-08-18

Similar Documents

Publication Publication Date Title
AU635137B2 (en) Self-cleaning filter
CA2851224C (en) Dust collector with a constant suction force
US20020008068A1 (en) Apparatus and method for backwashing fluid filter systems
CA2933519C (en) High-efficiency automatic self-cleaning strainer
US3936902A (en) Automatic cleaning apparatus for fluid filters
JP2015120157A (en) Apparatus for separating oil from gas mixture, and method for separating oil from gas mixture
US6543624B1 (en) Back-washable filter for liquids
JP2009517204A (en) Cleaning device
JPH06205911A (en) Method and rotary filter for filtering suspension
US3993564A (en) Filtration apparatus
GB2392855A (en) Filter cleaning device
WO1982001666A1 (en) Self cleaning filter
KR100380225B1 (en) A continuous filter's auto back wash device used cyclone methode
EP0616829A2 (en) Filter for liquids with solid particles in suspension, in particular lubricating and cooling fluid in machine tools
GB2121325A (en) Cleaning centrifuge
GB2059816A (en) Centrifugal separator apparatus
USRE34218E (en) Easily-cleanable filters
SU1736561A1 (en) Device for cleaning liquids
AU703286B2 (en) Apparatus and method for backwashing fluid filter systems
JP3011631U (en) Filter
SU1456188A1 (en) Apparatus for purifying liquids
JP3005713U (en) Filter
SU1650211A1 (en) Filter for gas purification
RU2485995C1 (en) Method of cleaning gas catching unit cartridge filter and turbofan to this end
RU2557595C1 (en) Rotary filter

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20080429