GB2218351A - Filter belt cleaning device - Google Patents
Filter belt cleaning device Download PDFInfo
- Publication number
- GB2218351A GB2218351A GB8910613A GB8910613A GB2218351A GB 2218351 A GB2218351 A GB 2218351A GB 8910613 A GB8910613 A GB 8910613A GB 8910613 A GB8910613 A GB 8910613A GB 2218351 A GB2218351 A GB 2218351A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pipe
- belt
- path
- installation according
- outlet opening
- 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
- 238000004140 cleaning Methods 0.000 title claims description 12
- 238000009434 installation Methods 0.000 claims description 18
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000004064 recycling Methods 0.000 abstract 1
- 238000000889 atomisation Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
- B01D29/684—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with a translatory 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
- B01D29/688—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
-
- 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
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
-
- 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
- B01D33/44—Regenerating the filter material in the filter
- B01D33/48—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D33/50—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Filtration Of Liquid (AREA)
Abstract
A filter belt 1 moves through a rinsing chamber 3 where it is cleaned by liquid fed through the belt from a nozzle pipe 7 which contacts the belt directly. As shown the belt is guided by means 8 and deflected round the pipe 7. The pipe may have a row of discharge holes, a continuous slit or holes leading into an axial groove. Trough 5 collects the liquid for recycling. Chamber 3 and trough 5 are demountably connected, and the trough floor slopes to outlet 6. <IMAGE>
Description
WATER-JET INSTALLATIONS FOR CLEANING FILTER BELTS
The invention relates to installations for cleaning filter belts, particularly in belt filter units with rotating filter belts.
Cleaning devices for filter belts in belt filter units are used to increase the service life of the filter belt, into which impurities which are not removed with the filter cake become embedded with time. Attempts to remove these impurities by brushing or scraping have proved satisfactory, but are costly.
Blowing off the filter belt surface with compressed air has been proposed, but is generally unsatisfactory, and pollutes the environment due to the resulting atomisation.
It has also been proposed in German Utility Model
No 37 10 616 to clean a filter belt by providing a jet pipe with several nozzles above the filter belt from which nozzles a liquid medium is sprayed under pressure onto the filter belt during the regeneration process.
Beneath the filter belt there is provided a collecting device for the rinsing liquid and the dirt removed from the filter belt which device cooperates with a suction removal device.
It has been shown that the nozzles which operate at high pressure are liable to break down and no optimum cleaning of the filter belt takes place as a result of the reciprocal influence of the nozzle sprays. In addition, the necessarily high pressure is costly in terms of energy and also leads to atomisation.
The present invention seeks to improve the known water-jet installation so that fewer disruptions in operation and less environmental damage occur with lower operating and maintenance costs, and to extend the service life of the filter belts by better cleaning thereof. In an installation according to the invention, a path is defined for the passage of a filter belt through a rinsing chamber. A pipe extends in the chamber transversely adjacent the path, and defines a boundary of the path such that a belt thereon is in direct contact with a portion of the pipe. In this portion is formed at least one outlet opening, and means are provided for feeding rinsing medium to the pipe for discharge through the opening or openings to clean the belt as it moves along the path.We have found that direct contact between the pipe and the belt surface produces far more intensive and effective cleaning of the belt, while requiring substantially lower rinsing medium pressure than had been needed in comparable installations previously known.
Because of the contact between the belt and the pipe in the use of an installation according to the invention, the belt can be deflected by the pipe which is thus used as a belt guide. Thus, the invention obviates the need for a deflection roller within the unit.
The opening or openings may be arranged in various configurations in the pipe, preferably in the actual region of the pipe surface that engages the belt.
In one embodiment, they take the form of holes which are evenly distributed across the width of the filter belt for the discharge rinsing medium. Separate nozzles, which are both costly and prone to failure, can thus be dispensed with. The holes may be enlarged on the filter belt side. A particularly favourable configuration of openings is an arrangement of holes in a paraxial, groove-shaped recess in the pipe wall which is in contact with the filter belt. Another configuration comprises a single outlet opening for the rinsing medium in the form of a paraxial slot, which engages the filter belt.
Installations according to the invention may be constructed as structural units each with a collecting trough, an outlet, and a supply pump for the rinsing medium, for use as an auxiliary attachment to belt filter units. The rinsing chamber and the collecting trough can be detachably connected to each other to facilitate cleaning.
Use of the invention can achieve an overall better operability of the belt filter unit, because a better composition of the dirt cake on the belt is established due to the better cleaning of the filter belt. The lower operating and maintenance costs increase the efficiency of the unit, as do the longer useful life of the filter belts and the reduction in operating malfunctions.
An embodiment of the invention will now be by way of example and with reference to the accompanying drawings wherein:
Figure 1 shows a cross-section through an
installation according to the invention in a
plane generally parallel to the path of a belt
therethrough;
Figure 2 shows a broken cross-section
through the installation of Figure 1, in a plane
generally perpendicular#to the path of a belt
therethrough; and
Figures 3 to 6 show partial elevations and
cross-sections in each case of different water
jet pipe configurations.
In Figure 1, a filter belt, which passes through a belt filter unit, only a section of housing 2 of which is shown, is marked 1. To the housing 2 there is screwed the rinsing chamber, marked 3, as shown at 4, which chamber forms a collecting trough 5 beneath the filter belt 1, the base of which trough runs laterally obliquely downwards, and at the lowest point of which the outlet 6 is arranged (Figure 2).
In the upper region of the rinsing chamber 3 above the belt, a water-jet pipe 7 is arranged transverse to the filter belt 1. The filter belt 1 is in tangential contact with the casing of the pipe 7. In addition, guides 8 are provided which close off the rinsing chamber 3 at the top and at the same time guide the filter belt 1.
In Figure 2, the same parts have the same references. As can be seen in the abbreviated view of the cross-section through the rinsing chamber 3, the base of the collecting trough 5 is inclined downwards to the right and ends in front of the outlet 6. The rinsing medium is fed into the water-jet pipe 7 at 11, which pipe is covered at the top by the guide plates 8.
In Figure 3, a section of a water-jet pipe is shown in which a row of cylindrical holes 10a is made in the casing at a regular spacing. In the variant of
Figure 4, the holes 10a of Figure 3 are widened outwards in order to achieve better distribution of the#rinsing medium. The widened holes are marked lOb.
Another way of improving the rinsing effect and distributing the rinsing medium is shown in Figure 5. A paraxial groove connects the holes 10a to each other to distribute the rinsing medium across the width of the belt. In Figure 6 the pipe 7 has a single outlet opening in the form of a paraxial slot lOC for discharge of the rinsing medium.
The direct contact of the water-jet pipe 7 on the filter belt 1 and the configuration of the outlet opening or openings forcibly distribute the liquid used to clean the filter belt 1 evenly across the filter belt, so that optimum cleaning takes place. Th#e dirt which collects in the collecting trough 5 of the rinsing chamber 3 is removed through the outlet 6, and clean rinsing medium is supplied at 11. The medium may be supplied from an external source such as a separate rinsing container or purified and recycled from the trough 5.
Claims (10)
1. An installation for cleaning filter belts in which a path is defined for the passage of a said belt, comprising a rinsing chamber through which the path extends; a pipe in the chamber and extending transversely adjacent and defining a boundary of said path such that a belt on said path is in direct contact with a portion of the pipe, the pipe having at least one outlet opening in said portion of the pipe; and means for feeding rinsing medium to the pipe for discharge through said at least one outlet opening to clean a said belt as it passes along the path.
2. An installation according to Claim 1 wherein the path of a said belt is deflected by the pipe.
3. An installation according to Claim 1 or
Claim 2 wherein the path is defined by guide plates on either side of the pipe.
4. An installation according to any preceding
Claim wherein said at least one outlet opening comprises holes evenly spaced along the length of said portion of the pipe.
5. An installation according to Claim 4 wherein the holes are enlarged at their discharge ends.
6. An installation according to any preceding
Claim wherein said at least one outlet opening comprises holes arranged in a paraxial groove in the external surface of the pipe.
7. An installation according to any of Claims 1 to 3 wherein said at least one outlet opening comprises a narrow, paraxial slot.
8. An installation according to any preceding
Claim constructed as a structural unit with a collecting trough, an outlet and a supply pump for rinsing medium, for use as an auxiliary attachment to belt filter units.
9. An installation according to Claim 8 wherein the rinsing chamber and the collecting trough are detachably connected to each other.
10. An installation for cleaning filter belts substantially as described herein with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8806372U DE8806372U1 (en) | 1988-05-11 | 1988-05-11 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8910613D0 GB8910613D0 (en) | 1989-06-21 |
| GB2218351A true GB2218351A (en) | 1989-11-15 |
| GB2218351B GB2218351B (en) | 1992-06-03 |
Family
ID=6824050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8910613A Expired - Fee Related GB2218351B (en) | 1988-05-11 | 1989-05-09 | Water-jet installations for cleaning filter belts |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH0217909A (en) |
| DE (1) | DE8806372U1 (en) |
| FR (1) | FR2631250B3 (en) |
| GB (1) | GB2218351B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108541651A (en) * | 2018-06-29 | 2018-09-18 | 高礼凤 | A kind of fish jar water treatment facilities |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9100315U1 (en) * | 1991-01-11 | 1992-05-07 | Rothhardt, Uwe Ernst | |
| DE19537396C1 (en) * | 1995-10-09 | 1996-12-05 | F E S Gmbh | Filter band cleansing device for use in a cooling lubricant system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB278175A (en) * | ||||
| GB427936A (en) * | 1934-06-27 | 1935-05-02 | Ferdinand George Henry | Improvements in self cleaning continuous filters |
| GB430700A (en) * | 1934-11-08 | 1935-06-24 | Lamort E & M | Improvements in and relating to endless-band filters |
| GB808691A (en) * | 1957-05-16 | 1959-02-11 | Edward Haller Replogle | Improvements in gas-borne dust filter apparatus |
| GB1534315A (en) * | 1975-06-10 | 1978-11-29 | Ciba Geigy Ag | Apparatus for reducing the liquid content of a layer of material formed on a filter |
| GB2098081A (en) * | 1981-05-11 | 1982-11-17 | Ingersoll Rand Co | Cleaning filter by contact with stationary apertured membrane |
-
1988
- 1988-05-11 DE DE8806372U patent/DE8806372U1/de not_active Expired
-
1989
- 1989-04-25 FR FR898905484A patent/FR2631250B3/en not_active Expired - Fee Related
- 1989-05-09 GB GB8910613A patent/GB2218351B/en not_active Expired - Fee Related
- 1989-05-10 JP JP1117188A patent/JPH0217909A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB278175A (en) * | ||||
| GB427936A (en) * | 1934-06-27 | 1935-05-02 | Ferdinand George Henry | Improvements in self cleaning continuous filters |
| GB430700A (en) * | 1934-11-08 | 1935-06-24 | Lamort E & M | Improvements in and relating to endless-band filters |
| GB808691A (en) * | 1957-05-16 | 1959-02-11 | Edward Haller Replogle | Improvements in gas-borne dust filter apparatus |
| GB1534315A (en) * | 1975-06-10 | 1978-11-29 | Ciba Geigy Ag | Apparatus for reducing the liquid content of a layer of material formed on a filter |
| GB2098081A (en) * | 1981-05-11 | 1982-11-17 | Ingersoll Rand Co | Cleaning filter by contact with stationary apertured membrane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108541651A (en) * | 2018-06-29 | 2018-09-18 | 高礼凤 | A kind of fish jar water treatment facilities |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8806372U1 (en) | 1988-06-30 |
| FR2631250B3 (en) | 1990-08-24 |
| GB2218351B (en) | 1992-06-03 |
| GB8910613D0 (en) | 1989-06-21 |
| FR2631250A1 (en) | 1989-11-17 |
| JPH0217909A (en) | 1990-01-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19960509 |