DK141316B - ELECTROmAGNET FILTER - Google Patents
ELECTROmAGNET FILTER Download PDFInfo
- Publication number
- DK141316B DK141316B DK160774A DK160774A DK141316B DK 141316 B DK141316 B DK 141316B DK 160774 A DK160774 A DK 160774A DK 160774 A DK160774 A DK 160774A DK 141316 B DK141316 B DK 141316B
- Authority
- DK
- Denmark
- Prior art keywords
- water
- cylindrical container
- filter
- connection point
- coil
- Prior art date
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 45
- 230000005291 magnetic effect Effects 0.000 description 8
- 238000011010 flushing procedure Methods 0.000 description 6
- 238000010926 purge Methods 0.000 description 4
- 239000003599 detergent Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000008400 supply water Substances 0.000 description 3
- 239000008237 rinsing water Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000001848 dysentery Diseases 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/025—High gradient magnetic separators
- B03C1/031—Component parts; Auxiliary operations
- B03C1/032—Matrix cleaning systems
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Magnetically Actuated Valves (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Description
( (11) FREMLÆ66ELSESSKRIFT 141316 DANMARK (en int.ci.3 b t(21) Arraigning nr. 1607/7^ (22) Indleveret den 25* mar. 19?^ (23) Lebedag 25· mar. 1974 (44) Ansøgningen fremlagt og _ . , non((11) PUBLICATION MANUAL 141316 DENMARK (an int.ci.3 bt (21) Arraigning No. 1607/7 ^ (22) Filed on 25 * Mar 19? ^ (23) Lebedag 25 · Mar 1974 (44) The application presented and _., non
fremlseggelseaaluiftBt offentliggjort den 25· ΓθΩ. l yOUthe promotion aluiftBt published on 25 · ΓθΩ. l yOU
DIREKTORATET FORDIRECTORATE OF
PATENT-OG VAREMÆRKEVÆSENET (30) Prioritet begæret fra dsn 15. apr. 1973a 2318755, 3® <71> JSLAFTWERK UNION AJKTIENGESELLSCHAFT, Muelheim (Ruhr), DE.PATENT AND TRADEMARKET (30) Priority requested from dsn 15 apr. 1973a 2318755, 3® <71> JSLAFTWERK UNION AJKTIENGESELLSCHAFT, Muelheim (Ruhr), DE.
(72) OpfinderJ Hans-Guenter Heitmann, Buckenhof, Im Heidewinkel 10, DE:(72) InventorJ Hans-Guenter Heitmann, Buckenhof, Im Heidewinkel 10, DE:
Manfred Schott, Erlangen, Wehneltstr. 3, DE.Manfred Schott, Erlangen, Wehneltstr. 3, DE.
(74) Fuldmægtig under sagens behandling:(74) Plenipotentiary in the proceedings:
Ingeniørfirmaet Glersing & Stellinger. _ (64) Elektromagnetfilter.The engineering firm Glersing & Stellinger. _ (64) Electromagnetic filter.
Pra de tyske patentskrifter nr. 1.277*^88 og 1.816.859 kendes elektromagnetfiltre, som i det væsentlige består af en cylindrisk beholder fyldt med magnetiserbare kugler. Den cylindriske beholder omgiver en spole, som under filterets drift magnetiseres med jævnstrøm og før gennemspullng af filteret afmagnetiseres med Veksel s tr&iia. Herunder strømmer vandet fra oven og nedefter igennem elektromagnetfilterets cylindriske beholder. Vandhastigheden indstilles under spulingen således, at kuglerne hvirvles op i den cylindriske beholder, således at aflejrede bestanddele fjernes fra kuglerne.German Patent Nos. 1,277 * 88 and 1,816,859 disclose electromagnetic filters, which consist essentially of a cylindrical container filled with magnetizable balls. The cylindrical container surrounds a coil which, during operation of the filter, is magnetized with direct current and, before flushing of the filter, is demagnetized with alternating wire. Below this, the water flows from above and down through the cylindrical container of the electromagnetic filter. The water velocity is adjusted during flushing so that the balls are swirled up into the cylindrical container so that deposited components are removed from the balls.
Sådanne elektromagnetfiltre benyttes f.eks. i dampkraft-anlseg, der opvarmes med fossile brændstoffer, og også i kernekraftværker for at fjerne ferromagnetiske urenheder fra fødevandet.Such electromagnetic filters are used e.g. in steam power plants heated with fossil fuels, and also in nuclear power plants to remove ferromagnetic impurities from the feed water.
2 14 ΐ 3162 14 ΐ 316
Afhængigt af mængden af fødevand, der skal renses i et sådant anlæg, må der enten anbringes et stort antal paralleltkob-lede magnetfiltre, eller der må konstrueres elektromagnetfiltre med relativt stor diameter i forhold til en ringe konstruktionshøjde*Depending on the amount of feed water to be purified in such a plant, either a large number of parallel-coupled magnetic filters must be applied or electromagnetic filters of relatively large diameter must be constructed in relation to a low structural height *
Svarende til filterets dimensioner må også spolen til frembringelse af et magnetfelt i filteret udformes med relativ stor diameter og ringe spolehøjde for store gennemstremmende mængder. Et elektromagnetfilter har herved ved omtrent samme konstruktionshøjde og dobbelte diameter en relativt væsentlig højere andel af magnetisk spredningsf lux* Dette medfører uregelmæssigheder i magnetfeltet og dårligere udskillelse. Yderligere er spulevandsmængden, som pr. tids» enhed må strømme igennem filteret for at hvirvle kuglerne op, i det væsentlige bestemt af filterets diameter, således at en væsentlig for» øgelse af filterets diameter kræver tilsvarende foranstaltninger for tilsikring af en tilstrækkelig tilførsel af spulemiddel.Corresponding to the dimensions of the filter, the coil for generating a magnetic field in the filter must also be designed with a relatively large diameter and low coil height for large flow rates. An electromagnetic filter hereby has a relatively substantially higher proportion of magnetic scattering flux at approximately the same design height and double diameter * This causes irregularities in the magnetic field and poorer excretion. Further is the amount of rinsing water, which per time unit must flow through the filter to swirl the balls up, essentially determined by the diameter of the filter, so that a substantial increase in the diameter of the filter requires similar measures to ensure a sufficient supply of rinse aid.
Det er den foreliggende opfindelses opgave at tilvejebringe et elektromagnetfilter, som tillader en væsentligt højere gennemstrømningsmængde ved ringe spulevandsforbrug, uden at der herved ved et ugunstigt dimensionsforhold imellem spolens diameter og spolens konstruktionshøjde kan optræde uregelmæssigheder i magnetfeltet og høje magnetiske spredningsfelter.It is the object of the present invention to provide an electromagnetic filter which permits a substantially higher flow rate at low wastewater consumption, without which an adverse dimensional relationship between the coil diameter and the coil design height can cause irregularities in the magnetic field and high magnetic scattering fields.
Ved et elektromagnetfilter af den indledningsvis nævnte art bestående af en cylindrisk beholder, der er fyldt med magnetiserbare kugler og er gennemstrømmet af vand, der skal renses, hvor beholderen er omgivet af en elektrisk spole til frembringelse af et magnetfelt, og hvor der findes en spulemiddeltilførselsledning til den cylindriske beholders nedre ende, såvel som en spulemiddelafgangsledning fra beholderens øvre ende, løses denne opgave derved, at der i en plan, som står vinkelret på den cylindriske beholders akse og går gennem den fælLes midte for de påfyldte kugler, findes der igennem tværsnittet fordelt åbninger, at disse åbninger er forbundet med et af to vandtilslutningssteder for tilførsel, henholdsvis bortledning, af vand, at ledningerne fra den cylindriske beholders ender fører til de andre vandtilslutningssteder, og at der i den ene afgående ledning fra den cylindriske beholders ene ende er indskudt en afspærringsventil.In an electromagnetic filter of the kind mentioned above, consisting of a cylindrical container filled with magnetizable balls and flowed through water to be cleaned, the container being surrounded by an electric coil to produce a magnetic field and where a purging supply line is provided to the lower end of the cylindrical container, as well as a detergent outlet conduit from the upper end of the container, this task is solved by the fact that in a plane perpendicular to the axis of the cylindrical container and passing through the common center of the filled balls, there is found through the cross-section distributed openings, these openings are connected to one of two water connection points for supply or discharge, respectively, of water, that the conduits from the ends of the cylindrical container lead to the other water connection points, and that at one outlet conduit from one end of the cylindrical container is inserted a shut-off valve.
En fordelagtig videre udformning ifølge opfindelsen består i, at der i den afgrenende ledning fra den cylindriske beholders øvre ende mellem afgreningsstedet for spulemiddelafgangsledningen og vandtilslutningsstedet, hvormed den cylindriske beholders to ender er forbundet, er indskudt en afspærringsventil, og at der findes en 3 141316 afspærrelig forbindelsesledning imellem den cylindriske beholders nedre ende og det andet vandtilslutningssted.An advantageous further embodiment of the invention consists in the insertion of a shut-off valve in the branching conduit from the upper end of the cylindrical container between the branching point of the detergent outlet conduit and the water connection point to which the two ends of the cylindrical container are connected. connecting line between the lower end of the cylindrical container and the second water connection point.
En anden fordelagtig videreudformning ifølge opfindelsen består i, at de med den cylindriske beholders to ender forbundne vand-tilslutningssteder tjener til tilførsel af vand, og at der til omskiftning fra filterdrift til spuling findes anbragt en afspærrings-ventil imellem dette vandtilslutningssted og den cylindriske beholder^ øvre ende, således at ledningen til den cylindriske beholders nedre ende samtidigt udgør spulemiddelafgangsledningen.Another advantageous further embodiment of the invention is that the water connection points connected to the two ends of the cylindrical container serve to supply water and that a switching valve between this water connection point and the cylindrical container is provided for switching from filter operation to flushing. upper end such that the conduit to the lower end of the cylindrical container simultaneously constitutes the detergent outlet conduit.
Endnu en videre udformning ifølge opfindelsen er karakteriseret ved, at vandtilslutningsstedet, som er forbundet med åbningerne i midten af kuglepåfyldningen, tjener for tilførsel af vand, og at kuglepåfyldningen hviler på en som si udformet bund, der befinder sig over den cylindriske beholders nedre ende.A further embodiment of the invention is characterized in that the water connection point, which is connected to the openings in the middle of the ball filling, serves to supply water and that the ball filling rests on a bottom shaped bottom which is above the lower end of the cylindrical container.
Et udførelseseksempel ifølge opfindelsen beskrives nærmere i det følgende under henvisning til tegningen, der viser et principdiagram for et elektromagnetfilter ifølge opfindelsen.An exemplary embodiment of the invention is described in more detail below with reference to the drawing which shows a principle diagram of an electromagnetic filter according to the invention.
På tegningen er vist et elektromagnetfilter, der i det væsentlige består af en cylindriske beholder 1, i hvilken der er p&-fyldt magnetiserbare kugler 2. Beholderen 1 er ud for området for kuglepåfyldningen 2 omgivet af en spole 3· Kuglepåfyldningen hviler på en som filter udformet bund 4, således at der over og under kugle-påfyldningen findes et frit rum i den cylindriske beholder 1» I midten af kuglepåfyldningen 2 i den cylindriske beholder 1 findes der igennem tværsnittet fordelt åbninger 5, som via rør 6 og en indgangs-ventil 7 ar forbundet med et vandtilslutningssted 8. 1 det forelig gende udførelseseksempel tjener vandtilslutningsstedet 8 for tilførsel af vand, der skal renses. Den cylindriske beholder l's ender 9 og 10 er via ledninger 11 og 12 og en udgangsventil 13 forbundet med et andet vandtilslutningssted 14. I ledningen 12, som er afgrenet fra den cylindriske beholder l's øvre ende 10, er der indskudt en afspærringaven-til 15. Yderligere udgår der fra den cylindriske beholder l's øvre ende 10 en spulemiddelafgangsledning 16 med en deri indskudt afspærringsventil 17· Endvidere findes der mellem den cylindriske beholder l's øvre ende 9 og vandtilslutningsstedet 8 anbragt en forbindelsesledning 18 med en afspærringsventil 19. Som det ikke er nærmere angivet på tegningen, kan spolen 3 efter ønske forbindes med en jævnspændingskilde eller med en vekselspændlngskilde.In the drawing, an electromagnetic filter is shown, consisting essentially of a cylindrical container 1, in which there are p-filled magnetizable balls 2. The container 1 is outside the area of the ball filling 2 surrounded by a coil 3 · The ball filling rests on a filter formed bottom 4 so that above and below the ball filling there is free space in the cylindrical container 1 »In the middle of the ball filling 2 in the cylindrical container 1 there are openings 5 distributed through the cross-section, which via pipe 6 and an inlet valve 7 ar associated with a water connection point 8. In the present embodiment, the water connection point 8 serves to supply water to be purified. The ends 9 and 10 of the cylindrical container 1 are connected via a conduit 11 and 12 and an output valve 13 to another water connection point 14. In the conduit 12, which is branched from the upper end 10 of the cylindrical container 1, a shut-off port-15 is inserted. Further, from the upper end 10 of the cylindrical container 1, a purging outlet line 16 is provided with a shut-off valve 17 inserted therein. In addition, a connecting line 18 is provided with a shut-off valve 19 between the cylindrical container 1 and the water connection point 8. In the drawing, the coil 3 may, if desired, be connected to a DC source or to an AC source.
Ved normal drift flyder der gennem filterets spole 3 en jævnstrøm, der magnetiserer kuglerne i den cylindriske heholder l's kuglepåfyldning 2. Vand ankommer fra vandtilslutningsstedet 8 via 141316 if indgangsventilen 7 og rørene 6 til åbningerne 5 i midten af kuglepåfyldningen. Herfra flyder der en del af vandet til den øvre ende 10 og en anden del af vandet til den cylindriske beholder 1's nedre ende 9. Tilstedeværende magnetiske urenheder forbliver hængende på kuglerne i kuglepåfyldningen 2, og det rensede vand strømmer igennem ledningerne 11 og 12 og igennem udgangsventilen 13 til vandtilslutningsstedet l4.In normal operation, a direct current flows through the coil 3 of the filter, which magnetizes the balls of the cylindrical holder 1's ball filling 2. Water arrives from the water connection point 8 via 141316 in the inlet valve 7 and the pipes 6 to the openings 5 in the center of the ball filling. From here, part of the water flows to the upper end 10 and another part of the water to the lower end 9 of the cylindrical container 1. Magnetic impurities present remain on the balls in the ball filling 2 and the purified water flows through the conduits 11 and 12 and through the output valve 13 to the water connection point 14.
En væsentligt højere gennemstrømningsmængde tillades for et sådant elektromagnetfilter derved: 1. ved opdeling af vandstrømmen i to dels trømme, 2. ved muligheden for at vælge en væsentlig større diameter for den cylindriske beholder 1, da kuglepåfyldningens højde ligeledes ligger væsentligt over den for et kun i én retning gennemstrømmet elektromagnetfilter.A substantially higher flow rate is allowed for such an electromagnetic filter thereby: 1. by dividing the water flow into two part streams, 2. by the possibility of choosing a substantially larger diameter for the cylindrical container 1, since the height of the ball filling is also substantially above that of a electromagnetic filter flowed in one direction.
Til omskiftning af filteret til spuling lukkes afspær»» ringsventilen 15» indgangs ven ti len 7 og udgangsventilen 13, medens afspærringsventilerne 17 og 19 åbnes. Nu strømmer der vand igennem forbindelsesledningen 18 til den nedre ende 9 og igennem kuglepåfyldningen 2 til den cylindriske beholder l's øvre ende forladende denne igennem spulemiddelafgangsledningen 16. Spulevandshastigheden må som tidligere vælges således, at kuglerne i kuglepåfyldningen 2 ophvirv-les, idet dog varigheden af spuleprocessen ikke forøges væsentligt trods kuglepåfyldningens større højde, når der mider elektromagnetfilterets spuling atter påtrykkes spolen 3 en jævnspænding, således at rester af urenheder, der endnu ikke er bortspulet, atter bindes til kuglerne. X dette tilfælde opnås der meget hurtigt atter rent spulevand i spulevandsafgangsledningen 16, og der kan ved omskiftning af ventilerne atter omstilles til filterdrift. I forhold til den gennem-stremmende mængde behøves der nu væsentligt mindre mængde af spulevand end ved et filter med gennemstrømning i én retning. Denne kendsgerning tillader også, at spulemidlet afgrenes fra vandtilslutningsstedet for tilførsel af vand, når vandstrømmen ikke bør afbrydes. I dette tilfælde er det nødvendigt, at afspærringsventilen 15, som vist i udførelseseksemplet, imellem den cylindriske beholder l's øvre ende og vandtilslutningsstedet 14 betjenes* I dette tilfælde lukkes afgangsventilen 13 ikke helt, således at en del af vandet, som strømmer igennem forbindelsesledningen 18, anvendes til spuling af elektromagnetfilteret, og at en anden del af vandet anvendes til opretholdelse af vandstrømmen imellem vandtilslutningsstedeme 8 og 14.For switching the filter to flush, the shut-off valve »» ring valve 15 »inlet valve 7 and the output valve 13 are closed, while the shut-off valves 17 and 19 are opened. Now, water flows through the connecting line 18 to the lower end 9 and through the ball filling 2 to the upper end of the cylindrical container 1 passing it through the purging outlet conduit 16. does not increase substantially despite the greater height of the ball filling when the flushing of the electromagnetic filter is re-applied to the coil 3 a direct voltage, so that residues of impurities which have not yet been flushed are again bonded to the balls. In this case, pure rinsing water is very quickly obtained again in the rinsing outlet 16, and the valves can again be switched to filter operation by changing the valves. Relative to the flow rate, a much smaller amount of flushing water is now needed than a one-way flow filter. This fact also allows the flushing agent to be branched from the water connection point for supplying water when the flow of water should not be interrupted. In this case, it is necessary that the shut-off valve 15, as shown in the embodiment, between the upper end of the cylindrical container 1 and the water connection point 14 be operated. is used to flush the electromagnetic filter and that another portion of the water is used to maintain the flow of water between the water connection points 8 and 14.
Kan en afbrydelse af vandstrømmen finde sted, så kan forbindelsesledningen 18 falde bort. Det er dog også muligt uden 141316 5 shuntledning at anvende vandtilslutningsstedet l4 for tilførsel af vand og vandtilelutningsstedet 8 for bortledning af vand* En særlig spulemiddeltilførselsledning er da ikke nødvendig, da ved lukket afspærring svent il 15 ledningen 11, der i forvejen tjente for tilførsel af vand, kan overtage denne opgave.If an interruption of the water flow can occur, then the connecting line 18 may fall away. However, it is also possible without the shunt conduit to use the water connection point 14 for supplying water and the water connection point 8 for water discharge * A special purging supply line is then not necessary, since by closed shut-off, the line 11 which previously served for supplying water can take over this task.
Anvendes dog vandtilslutningsetedet 8 for tilførsel af vand og anbringes den som filter udfor··de bund k for kuglepåfyldningen 2 over den cylindriske beholder 1 'nedre ende 91 s& kan det ved bortfald af spænding til spolen 3 opnås, at vand, der er blevet tilsaidset af løsnede forureninger, anko—>r til vaadkredøløbet, da tiden, øen vandet bruger til gmxammatreaning af ruaawt inelløn kuglefyldningena ende og den cylindriske beholders ende er tilstrækkelig til at afbryde vandstrensen igennem elektromagnetfilteret,However, if the water connection site 8 is used for supplying water and it is placed as a filter outside the bottom k of the ball filling 2 over the lower end 91 of the cylindrical container 1, it can be obtained that the water which has been saturated is lost when voltage is applied to the coil 3. of loosened contaminants, anchors to the water circuit as the time spent on the island water for gamma-ray mating of roughly inelastic sphere filling and the end of the cylindrical container is sufficient to interrupt the water flow through the electromagnetic filter;
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732318755 DE2318755C2 (en) | 1973-04-13 | 1973-04-13 | Double current electromagnetic filter |
| DE2318755 | 1973-04-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK141316B true DK141316B (en) | 1980-02-25 |
| DK141316C DK141316C (en) | 1980-08-25 |
Family
ID=5878032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK160774A DK141316C (en) | 1973-04-13 | 1974-03-25 | ELECTROmAGNET FILTER |
Country Status (14)
| Country | Link |
|---|---|
| AT (1) | AT330805B (en) |
| BE (1) | BE813413A (en) |
| CA (1) | CA1036949A (en) |
| CH (1) | CH564374A5 (en) |
| CS (1) | CS178913B2 (en) |
| DE (1) | DE2318755C2 (en) |
| DK (1) | DK141316C (en) |
| FI (1) | FI57216C (en) |
| FR (1) | FR2225213B1 (en) |
| GB (1) | GB1468748A (en) |
| IT (1) | IT1009763B (en) |
| NL (1) | NL7404490A (en) |
| RO (1) | RO72371A (en) |
| SE (1) | SE395370B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4172084A (en) * | 1977-05-31 | 1979-10-23 | Standard Oil Company | Production of maleic anhydride from four-carbon hydrocarbons using catalysts prepared by hydrothermal techniques |
| CA1134752A (en) * | 1978-04-17 | 1982-11-02 | John R. Slavens | Dual-flow electromagnetic filter |
| FR2437862A1 (en) * | 1978-10-05 | 1980-04-30 | Framatome Sa | FILTER FOR PURIFYING A FLUID CONTAINING FERRO-MAGNETIC PARTICLES |
| DE3624626A1 (en) * | 1986-07-18 | 1988-01-28 | Pilgrimm Herbert | Process for separating off substances from a mixture of substances using magnetic liquids |
| DE3938245A1 (en) * | 1989-11-17 | 1991-05-23 | Erwin Lotze | Liq. filtration by fine mobile magnetic particles layer - subject to variable field and periodically transformed for regeneration |
-
1973
- 1973-04-13 DE DE19732318755 patent/DE2318755C2/en not_active Expired
-
1974
- 1974-03-08 FI FI70274A patent/FI57216C/en active
- 1974-03-25 DK DK160774A patent/DK141316C/en active
- 1974-04-02 NL NL7404490A patent/NL7404490A/xx not_active Application Discontinuation
- 1974-04-04 SE SE7404560A patent/SE395370B/en unknown
- 1974-04-05 AT AT286974A patent/AT330805B/en not_active IP Right Cessation
- 1974-04-08 BE BE142937A patent/BE813413A/en not_active IP Right Cessation
- 1974-04-09 IT IT2113474A patent/IT1009763B/en active
- 1974-04-09 CA CA197,174A patent/CA1036949A/en not_active Expired
- 1974-04-10 RO RO7478369A patent/RO72371A/en unknown
- 1974-04-10 GB GB1604974A patent/GB1468748A/en not_active Expired
- 1974-04-10 FR FR7412659A patent/FR2225213B1/fr not_active Expired
- 1974-04-11 CH CH514574A patent/CH564374A5/xx not_active IP Right Cessation
- 1974-04-11 CS CS263174A patent/CS178913B2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1468748A (en) | 1977-03-30 |
| DK141316C (en) | 1980-08-25 |
| FR2225213A1 (en) | 1974-11-08 |
| CS178913B2 (en) | 1977-10-31 |
| RO72371A (en) | 1982-02-26 |
| AU6768274A (en) | 1975-10-09 |
| CA1036949A (en) | 1978-08-22 |
| CH564374A5 (en) | 1975-07-31 |
| FI57216C (en) | 1980-07-10 |
| NL7404490A (en) | 1974-10-15 |
| DE2318755C2 (en) | 1982-03-04 |
| FR2225213B1 (en) | 1978-06-30 |
| BE813413A (en) | 1974-07-31 |
| IT1009763B (en) | 1976-12-20 |
| AT330805B (en) | 1976-07-26 |
| FI57216B (en) | 1980-03-31 |
| DE2318755A1 (en) | 1974-10-24 |
| SE395370B (en) | 1977-08-15 |
| ATA286974A (en) | 1975-10-15 |
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