GB2212733A - Filter - Google Patents
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- Publication number
- GB2212733A GB2212733A GB8728113A GB8728113A GB2212733A GB 2212733 A GB2212733 A GB 2212733A GB 8728113 A GB8728113 A GB 8728113A GB 8728113 A GB8728113 A GB 8728113A GB 2212733 A GB2212733 A GB 2212733A
- Authority
- GB
- United Kingdom
- Prior art keywords
- head
- filter
- liquid
- filtering
- container
- 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
Links
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000000717 retained effect Effects 0.000 claims abstract 2
- 239000012530 fluid Substances 0.000 claims description 3
- 230000000063 preceeding effect Effects 0.000 claims 2
- 239000011324 bead Substances 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000012993 chemical processing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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
- B01D29/09—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 filtering bands, e.g. movable between filtering operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/01—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
- B01D33/015—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with flat filtering elements
- B01D33/0183—Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with flat filtering elements supported
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
- B01D33/803—Accessories in which the filtering elements are moved between filtering operations ; Particular measures for removing or replacing the filtering elements; Transport systems for filters
-
- 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
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A filter comprises a perforated head 10 to which a vacuum is applied via a pipe 11. Filtering material is provided by a web 13. As the bead 10 moves down toward the liquid in a container 19, it punches out a piece of filtering material which is retained in position by the vacuum. The liquid is drawn up by the vacuum and filtrate passes along the pipe 12. After filtering the head 10 is moved upwards and compressed air is delivered to the head through inlet 18' and also to a ring nozzle 17, 18 to blow off the used filter material. Web 13 is then indexed to provide a clean piece of filter material, while a conveyor delivers a further container 19. <IMAGE>
Description
FILTER SYSTEM
The invention relates to filtering systems.
There are many requirements for filtering systems and in particular such systems are often required to be automated or semi#automated. In chemical processing plants for example part of a control or monitoring system may include periodic sampling of the ingredients. As such a sample is taken, treated with a reagent and tested to determine the progress of the chemical process. It is known in the sugar industry for example to sample test for sugar content and nitrogen by adding a reagent to a small process sample and testing the reaction. In this case and in many others it is necessary to filter before testing. It has been common practice to tip the mixed sample and reagent through a conical filter.This leads inevitably to require a conveyor arranged to upend the sampling vessel so as to pour the contents into the filter which complicates or at least limits the development of further automation.
It is an object of the present invention to provide a filtering system which at least overcomes this problem.
According to the invention there is provided a filtering system for filtering a liquid in a container comprising a movable filter head to which a vacuum can be applied, a transport for a filter web extending across the path of movement of the head, and means to move the head along the path, the arrangement being such that in use the filter head punches out a part of the filter web to cover the head as the head moves towards the surface of liquid to be filtered and the vacuum causes the liquid in the container to be drawn up through the filter.
The head is preferably controlled to move slowly during filtering at a rate which maintains the head a predetermined depth below the surface of the liquid in the container.
The head may include ports arranged to be supplied with compressed air to blow the filter off the head after filtering of the liquid has been completed.
Exhaust ports may be provided disposed around the path of movement of the head to direct air or other fluid against the side of the head as the head moves past to clean off any material on the sides of the head as the head moves past the ports.
A filtering system according to the invention will now be described by way of example with reference to the accompanying diagrammatic part-sectioned elevation of the system.
Referring to the drawing, a filter head 9 has a perforated lower plate 10 in communication with a vacuum pipe 11 connected to a source of vacuum via a delivery tube 12. A roll 13 of filter web 14 is mounted at one side of the head and supplies the web 14 via a web transport extending across the path of movement of the head 10 guided by circular jaws 15. The head 10 is mounted on the end of a shaft 16 supported by bearings (not shown) and driven by a motor (not shown) along a vertical path as explained in more detail below. Below the jaws 15 a hollow annular ring 17 is mounted to provide a circular port 18. A source of compressed air (not shown) is connected to the annular ring 17 and also to a pipe 18 in the head 10. A container 19 for transporting sampling fluid is mounted on a conveyor belt 20 below the head 10.
In use, when a container 19 is in the position shown, the head 10 is moved downwards and punches out a piece of filter material from the web 14 which covers the perforated plate 10 and is held against the plate by the vacuum. The head continues to move down until the plate 10 just enters the upper surface of liquid in the container 19. The downward movement is then slowed and continues at a rate which corresponds at least generally with the rate at which liquid is sucked up through the head, and filtered, and passes as test filtered liquid via the vacuum pipe 11 to another container (not shown). When sufficient liquid has been filtered the head is moved upwards, the vacuum is removed and air is supplied to the pipe 18 and to the ring 17.The punched-out piece of filter is blown off the plate 10 and falls into the container 19 and as the head 9 continues to move upwards the sides of the head are cleaned by the air exhausting from the ring 17.
The filter web is then indexed forward, being guided by the jaws 15 to bring a new piece of filter material under the head 9 ready for-a next cycle when the conveyor 20 has moved a next container into position under the head 9.
It will be noted that the filtering operation is carried out automatically; no manual intervention is required, not even to change or replenish the filter. In most cases the integrety of the sample is also maintained as the container 19 is not and certainly need not be completely emptied as is normally the case in the prior art when the container 19 must be upturned for carrying out filtering. This means that the precise sample can be re-tested if necessary. Further because the container 19 is not necessarily upturned, flexibility of the container transport system is not correspondingly restricted.
Claims (6)
1. A filtering system for filtering a liquid in a container comprising a movable filter head to which a vacuum can be applied, a transport for a filter web extending across the path of movement of the head, and means to move the head along the path, the arrangement being such that in use the filter head punches out a part of the filter web to cover the head as the head moves towards the surface of liquid to be filtered and the vacuum causes the liquid in the container to be drawn up through the filter.
2. A system according to Claim 1, in which the punched out part of the filter web is retained against the head solely by the vacuum applied to the head in use.
3. A system according to Claim 1 or 2, in which the head is controlled to move slowly during filtering at a rate which maintains the head a predetermined depth below the surface of the liquid in the container.
4. A system according to any of the preceeding Claims in which the head includes ports arranged to be supplied with compressed air to blow the filter off the head after filtering of the liquid has been completed.
5. A system according to any of the preceeding Claims in which exhaust ports are provided disposed around the path of movement of the head to direct air or other fluid against the side of the head as the head moves away from the surface of the liquid to clean off any material on the sides of the head as the head moves past the ports.
6. A filtering system substantially as herein described with reference to the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8728113A GB2212733B (en) | 1987-12-01 | 1987-12-01 | Filter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8728113A GB2212733B (en) | 1987-12-01 | 1987-12-01 | Filter system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8728113D0 GB8728113D0 (en) | 1988-01-06 |
| GB2212733A true GB2212733A (en) | 1989-08-02 |
| GB2212733B GB2212733B (en) | 1991-07-10 |
Family
ID=10627824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8728113A Expired - Lifetime GB2212733B (en) | 1987-12-01 | 1987-12-01 | Filter system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2212733B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993011850A1 (en) * | 1991-12-05 | 1993-06-24 | Profit Improvement & Engineering Limited | Improvements in or relating to belt filters |
| US5292434A (en) * | 1992-04-07 | 1994-03-08 | Benesi Steve C | Filter apparatus and method using belt filter medium |
| WO1995027195A1 (en) * | 1994-03-31 | 1995-10-12 | Millipore Corporation | Membrane cutter and retriever |
| CN102350116A (en) * | 2011-08-23 | 2012-02-15 | 湖州旺能环保科技有限公司 | Vacuum filter draining device |
| CN109529433A (en) * | 2018-11-22 | 2019-03-29 | 安徽六顺创业特种滤材有限公司 | A kind of filter cloth tensioning apparatus |
-
1987
- 1987-12-01 GB GB8728113A patent/GB2212733B/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993011850A1 (en) * | 1991-12-05 | 1993-06-24 | Profit Improvement & Engineering Limited | Improvements in or relating to belt filters |
| US5480544A (en) * | 1991-12-05 | 1996-01-02 | Profit Improvement And Engineering Limited | Belt filters |
| US5292434A (en) * | 1992-04-07 | 1994-03-08 | Benesi Steve C | Filter apparatus and method using belt filter medium |
| WO1995027195A1 (en) * | 1994-03-31 | 1995-10-12 | Millipore Corporation | Membrane cutter and retriever |
| CN102350116A (en) * | 2011-08-23 | 2012-02-15 | 湖州旺能环保科技有限公司 | Vacuum filter draining device |
| CN109529433A (en) * | 2018-11-22 | 2019-03-29 | 安徽六顺创业特种滤材有限公司 | A kind of filter cloth tensioning apparatus |
| CN109529433B (en) * | 2018-11-22 | 2021-06-04 | 安徽六顺创业特种滤材有限公司 | Filter cloth tensioning device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8728113D0 (en) | 1988-01-06 |
| GB2212733B (en) | 1991-07-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19921201 |