US3631985A - Device for cleaning magnetic filters - Google Patents
Device for cleaning magnetic filters Download PDFInfo
- Publication number
- US3631985A US3631985A US28301A US3631985DA US3631985A US 3631985 A US3631985 A US 3631985A US 28301 A US28301 A US 28301A US 3631985D A US3631985D A US 3631985DA US 3631985 A US3631985 A US 3631985A
- Authority
- US
- United States
- Prior art keywords
- magnetic
- container
- grate
- container means
- blade
- 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.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 38
- 238000004140 cleaning Methods 0.000 title description 10
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000005294 ferromagnetic effect Effects 0.000 description 4
- 230000002000 scavenging effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010011416 Croup infectious Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/06—Filters making use of electricity or magnetism
Definitions
- the present invention relates to a device for cleaning magnetic filters. It has already been suggested to clean magnetic filters of ferromagnetic substances deposited on the magnetic parts of the filters by moving the magnets relative to the surrounding water at such a high speed that the magnetic deposits are torn off the magnetic parts of the filter. The torn off deposits can then by scavenging water be washed out from the magnetic filter. This method, however, has the drawback that considerable energy is required in order to rotate the rather heavy magnetic system at correspondingly high speeds.
- the known method is carried out in a device in which within a pressure body there is provided a permanent magnet system on a rotatable shaft which permanent magnet system is at a standstill during normal operation so that the magnetic impurities in the water can deposit or collect on the filter.
- a permanent magnet system on a rotatable shaft which permanent magnet system is at a standstill during normal operation so that the magnetic impurities in the water can deposit or collect on the filter.
- the device according to the present invention comprises a plurality of magnetic systems arranged one above the other in spaced relationship to each other while between the individual magnetic systems propellers or blades are rotatably arranged which for purposes of cleaning the magnetic system are rotated at relatively high speed so as to impart upon the surrounding water such a speed that the ferromagnetic substances deposited on the magnetic system will be torn off from the latter and can be withdrawn from the filter by scavenging fluid.
- the arrangement shown therein comprises a pressure resistant housing 1 having its lower portion provided with an intake 2 while its upper portion is provided with a discharge 3.
- a plurality of magnetic grates 4 are so arranged that for purposes of servicing the filter, they can be removed individually from the housing 1.
- propellers 5 are connected or keyed to a shaft 6 rotatably journaled in bearings 7, 8.
- Shaft 6 is through a coupling 9 drivingly connected to a transmission 10 which in its turn is drivingly connected to an electric motor 11.
- the bearing 8 is sealed toward the outside by a stuffing box seal 12.
- an inlet 13 for scavenging or rising water which is necessary for cleaning the magnetic grates 4.
- the water which is already in the housing 1 may be discharged through the discharge opening 14 and the discharge valve 15.
- the water to be cleaned flows from the bottom in upward direction through the pressure resistant housi n l as indicated by the arrows. Ferromagnetic parts or partlc es w
- the propellers 5 are normally at a standstill.
- the water supply is first shutoff and scavenging or cleaning water is admitted through the intake 2 while their propellers 5 are rotated by the motor 11 through the intervention of the transmission 10, the coupling 9 and the shaft 6. In this way the propellers create such a strong flow that the deposits are torn off from the magnetic grates and are washed out by the rinsing water.
- the blades of the propellers are expediently so designed that their angle of incident or pitch may be adjusted. It is furthermore advantageous to arrange the propellers in pairs and so to design the same that the propellers of each pair will run counter currently so that a strong turbulent flow will be produced. Moreover, the pitch angles of the individual propeller blades may be different. in this way, in addition to creating turbulence, a slow flow to the discharge will now be realized.
- the variation of the pitch angle of the propellers may be effected in any standard manner, at it is known, for instance, in connection with airplane propellers.
- a magnetic filtering device which includes longitudinally extending container means having fluid inlet and outlet means at oppositely located end portions of said container means, a plurality of magnetic grate means serially arranged in said container means and spaced from each other in the longitudinal direction of said container means, a plurality of rotary blade means interposed between said magnetic grate means, and means operatively connected to said blade means for selectively rotating the same to produce a strong fluid flow along the surfaces of said grate means.
- a device in which all of said rotary blade means are keyed to a common shaft extending in the longitudinal direction of said container means and substantially coaxial therewith.
- each two successive blade means are rotatable in counter current direction with regard to each other for creating turbulence.
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
A magnetic filtering device in which propeller means are interposed between serially arranged magnetic grates and are adapted to be rotated to impart a high-velocity flow upon liquid surrounding the magnetic grates.
Description
United States Patent [72] Inventor Joachim Taeger Rheinhausen, Germany [21] Appl. No. 28,301
[22] Filed Apr. 14, 1970 [45] Patented Jan. 4, 1972 [73] Assignee Fried. Krupp Gesellschafl mit beschrankter I-Iaitung Essen, Germany [32] Priority May 3, 1969 [3 3] Germany [54] DEVICE FOR CLEANING MAGNETIC FILTERS 4 Claims, 1 Drawing Fig.
[52] US. (I 210/222,
[51] Int. Cl B036 1/30 [50] Field of Search 210/222, 223, 327, 332, 333, 353, 354, 391
[56] References Cited UNITED STATES PATENTS 969,364 9/1910 Gootenhuis 210/354 3,326,374 6/1967 Jones 210/222 Primary ExaminerReuben Friedman Assistant Examiner-T. A. Granger Attorney-Walter Becker ABSTRACT: A magnetic filtering device in which propeller means are interposed between serially arranged magnetic grates and are adapted to be rotated to impart a high-velocity flow upon liquid surrounding the magnetic grates.
DEVICE FOR CLEANING MAGNETIC FILTERS The present invention relates to a device for cleaning magnetic filters. It has already been suggested to clean magnetic filters of ferromagnetic substances deposited on the magnetic parts of the filters by moving the magnets relative to the surrounding water at such a high speed that the magnetic deposits are torn off the magnetic parts of the filter. The torn off deposits can then by scavenging water be washed out from the magnetic filter. This method, however, has the drawback that considerable energy is required in order to rotate the rather heavy magnetic system at correspondingly high speeds. For instance, the known method is carried out in a device in which within a pressure body there is provided a permanent magnet system on a rotatable shaft which permanent magnet system is at a standstill during normal operation so that the magnetic impurities in the water can deposit or collect on the filter. For purposes of cleaning the filter, it is however necessary to rotate the magnetic system at a high speed for which purpose considerable power is required.
It is, therefore, an object of the present invention to provide a device for cleaning the magnetic filters which will overcome the above-mentioned drawbacks.
For purposes of realizing the above-outlined object, it is suggested according to the present invention for purposes of removing the deposited ferromagnetic material collected on the magnetic system at relatively low water speed, to permit the magnetic system to rest and to rotate the surrounding water at such a speed that the ferromagnetic substances deposited on the magnets will be torn off from the latter. More specifically, the device according to the present invention comprises a plurality of magnetic systems arranged one above the other in spaced relationship to each other while between the individual magnetic systems propellers or blades are rotatably arranged which for purposes of cleaning the magnetic system are rotated at relatively high speed so as to impart upon the surrounding water such a speed that the ferromagnetic substances deposited on the magnetic system will be torn off from the latter and can be withdrawn from the filter by scavenging fluid.
It will be appreciated that in this way with the device according to the invention, no major masses have to be accelerated. The propellers or blades can easily be turned and the power consumption is low so that the driving device and, if necessary, transmissions pertaining thereto can have small dimensions and can be light in weight.
This object and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawing diagrammatically illustrating a vertical section through a magnetic filter according to the present invention.
Referring now to the drawing in detail, the arrangement shown therein comprises a pressure resistant housing 1 having its lower portion provided with an intake 2 while its upper portion is provided with a discharge 3. In the housing 1 there are provided in superimposed and spaced relationship to each other a plurality of magnetic grates 4. These grates are so arranged that for purposes of servicing the filter, they can be removed individually from the housing 1. Between the fixedly arranged magnetic grates 4 and above the uppermost magnetic grate, there are provided correspondingly spaced propellers 5 which are connected or keyed to a shaft 6 rotatably journaled in bearings 7, 8. Shaft 6 is through a coupling 9 drivingly connected to a transmission 10 which in its turn is drivingly connected to an electric motor 11. The bearing 8 is sealed toward the outside by a stuffing box seal 12. In the upper portion of the pressure resistant housing I there is furthermore provided an inlet 13 for scavenging or rising water which is necessary for cleaning the magnetic grates 4. The water which is already in the housing 1 may be discharged through the discharge opening 14 and the discharge valve 15.
During the normal operation of the filter, the water to be cleaned flows from the bottom in upward direction through the pressure resistant housi n l as indicated by the arrows. Ferromagnetic parts or partlc es w|ll deposit on the magnetic grates 4. The propellers 5 are normally at a standstill. For purposes of cleaning the filter, the water supply is first shutoff and scavenging or cleaning water is admitted through the intake 2 while their propellers 5 are rotated by the motor 11 through the intervention of the transmission 10, the coupling 9 and the shaft 6. In this way the propellers create such a strong flow that the deposits are torn off from the magnetic grates and are washed out by the rinsing water.
The blades of the propellers are expediently so designed that their angle of incident or pitch may be adjusted. It is furthermore advantageous to arrange the propellers in pairs and so to design the same that the propellers of each pair will run counter currently so that a strong turbulent flow will be produced. Moreover, the pitch angles of the individual propeller blades may be different. in this way, in addition to creating turbulence, a slow flow to the discharge will now be realized. A
It may also be added that the variation of the pitch angle of the propellers may be effected in any standard manner, at it is known, for instance, in connection with airplane propellers.
It is, of course, to be understood that the present invention is, by no means, limited to the particular construction shown in the drawing but also comprises any modifications within the scope of the appended claims.
What I claim is:
l. A magnetic filtering device which includes longitudinally extending container means having fluid inlet and outlet means at oppositely located end portions of said container means, a plurality of magnetic grate means serially arranged in said container means and spaced from each other in the longitudinal direction of said container means, a plurality of rotary blade means interposed between said magnetic grate means, and means operatively connected to said blade means for selectively rotating the same to produce a strong fluid flow along the surfaces of said grate means.
2. A device according to claim I, in which all of said rotary blade means are keyed to a common shaft extending in the longitudinal direction of said container means and substantially coaxial therewith.
3. A device according to claim 1, in which each two successive blade means are rotatable in counter current direction with regard to each other for creating turbulence.
4. A device according to claim 1, in which the pitch angle of the blade means is variable.
Claims (4)
1. A magnetic filtering device which includes longitudinally extending container means having fluid inlet and outlet means at oppositely located end portions of said container means, a plurality of magnetic grate means serially arranged in said container means and spaced from each other in the longitudinal direction of said container means, a plurality of rotary blade means interposed between said magnetic grate means, and means operatively connected to said blade means for selectively rotating the same to produce a strong fluid flow along the surfaces of said grate means.
2. A device according to claim 1, in which all of said rotary blade means are keyed to a common shaft extending in the longitudinal direction of said container means and substantially coaxial therewith.
3. A device according to claim 1, in which each two successive blade means are rotatable in counter current direction with regard to each other for creating turbulence.
4. A device according to claim 1, in which the pitch angle of the blade means is variable.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691922635 DE1922635B1 (en) | 1969-05-03 | 1969-05-03 | Device for cleaning magnetic filters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3631985A true US3631985A (en) | 1972-01-04 |
Family
ID=5733166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US28301A Expired - Lifetime US3631985A (en) | 1969-05-03 | 1970-04-14 | Device for cleaning magnetic filters |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3631985A (en) |
| AT (1) | AT299255B (en) |
| DE (1) | DE1922635B1 (en) |
| FR (1) | FR2047120A5 (en) |
| GB (1) | GB1232948A (en) |
| NL (1) | NL7005841A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2420568A1 (en) * | 1973-05-02 | 1974-11-21 | Water Technology Service Inc | LIQUID TREATMENT EQUIPMENT |
| US4422934A (en) * | 1982-04-22 | 1983-12-27 | Debney-Spencer Industries Ltd. | Magnetic device for the treatment of calcareous fluids |
| US6077333A (en) * | 1995-10-16 | 2000-06-20 | Wolfs; Paulus | Device for removing magnetizable parts |
| US20060027504A1 (en) * | 2004-07-23 | 2006-02-09 | Takeshi Nakashima | Method to produce the activated liquid which contains micro gas bubbles and methods realized by the use of the liquid |
| US20060076277A1 (en) * | 2002-02-22 | 2006-04-13 | Regents Of The University Of Minnesota | Separation apparatus and methods |
| US20210394093A1 (en) * | 2019-08-01 | 2021-12-23 | Yanshan University | Consumption-free high-efficiency filter |
| US20220001310A1 (en) * | 2018-11-14 | 2022-01-06 | Bollfilter Nordic Aps | Filter candle and method for operating such filter candle |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4490252A (en) * | 1976-04-01 | 1984-12-25 | Brigante Miguel F | Electrostatic scale control apparatus for feed water having rotating helix responsive to water flow rate |
| CN110860945B (en) * | 2019-11-29 | 2020-08-18 | 重庆宏钢数控机床有限公司 | Flat guide rail inclined bed body with lubricating oil return groove and oil collecting box |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US969364A (en) * | 1910-02-15 | 1910-09-06 | Lewis T Grootenhuis | Revolving self-cleaning screen. |
| US3326374A (en) * | 1962-07-25 | 1967-06-20 | Quebec Smelting & Refining Ltd | Magnetic separator with washing and scouring means |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1277488B (en) * | 1967-06-08 | 1968-09-12 | Siemens Ag | Device for the electromagnetic removal of iron oxides from liquid |
-
1969
- 1969-05-03 DE DE19691922635 patent/DE1922635B1/en active Pending
-
1970
- 1970-04-14 US US28301A patent/US3631985A/en not_active Expired - Lifetime
- 1970-04-22 NL NL7005841A patent/NL7005841A/xx unknown
- 1970-04-24 AT AT376170A patent/AT299255B/en not_active IP Right Cessation
- 1970-04-29 FR FR7015713A patent/FR2047120A5/fr not_active Expired
- 1970-05-01 GB GB1232948D patent/GB1232948A/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US969364A (en) * | 1910-02-15 | 1910-09-06 | Lewis T Grootenhuis | Revolving self-cleaning screen. |
| US3326374A (en) * | 1962-07-25 | 1967-06-20 | Quebec Smelting & Refining Ltd | Magnetic separator with washing and scouring means |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2420568A1 (en) * | 1973-05-02 | 1974-11-21 | Water Technology Service Inc | LIQUID TREATMENT EQUIPMENT |
| US4422934A (en) * | 1982-04-22 | 1983-12-27 | Debney-Spencer Industries Ltd. | Magnetic device for the treatment of calcareous fluids |
| US6077333A (en) * | 1995-10-16 | 2000-06-20 | Wolfs; Paulus | Device for removing magnetizable parts |
| US20060076277A1 (en) * | 2002-02-22 | 2006-04-13 | Regents Of The University Of Minnesota | Separation apparatus and methods |
| US20060027504A1 (en) * | 2004-07-23 | 2006-02-09 | Takeshi Nakashima | Method to produce the activated liquid which contains micro gas bubbles and methods realized by the use of the liquid |
| US8097166B2 (en) | 2004-07-23 | 2012-01-17 | Takeshi Nakashima | Method to produce the activated liquid which contains micro gas bubbles and methods realized by the use of the liquid |
| US20220001310A1 (en) * | 2018-11-14 | 2022-01-06 | Bollfilter Nordic Aps | Filter candle and method for operating such filter candle |
| US11872507B2 (en) * | 2018-11-14 | 2024-01-16 | Bollfilter Nordic Aps | Filter candle and method for operating such filter candle |
| US20210394093A1 (en) * | 2019-08-01 | 2021-12-23 | Yanshan University | Consumption-free high-efficiency filter |
| US11845023B2 (en) * | 2019-08-01 | 2023-12-19 | Yanshan University | Filter with passive-rotation filter flements |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2047120A5 (en) | 1971-03-12 |
| DE1922635B1 (en) | 1970-07-30 |
| GB1232948A (en) | 1971-05-26 |
| NL7005841A (en) | 1970-11-05 |
| AT299255B (en) | 1972-06-12 |
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