EP1044050A1 - Procede pour la filtration d'un liquide - Google Patents

Procede pour la filtration d'un liquide

Info

Publication number
EP1044050A1
EP1044050A1 EP98965744A EP98965744A EP1044050A1 EP 1044050 A1 EP1044050 A1 EP 1044050A1 EP 98965744 A EP98965744 A EP 98965744A EP 98965744 A EP98965744 A EP 98965744A EP 1044050 A1 EP1044050 A1 EP 1044050A1
Authority
EP
European Patent Office
Prior art keywords
filter
filter aid
liquid
filtration
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.)
Withdrawn
Application number
EP98965744A
Other languages
German (de)
English (en)
Inventor
Karl-Günter BREMER
Karl Heinz BÜHL
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.)
Mann and Hummel GmbH
Original Assignee
Mann and Hummel GmbH
Filterwerk Mann and Hummel GmbH
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
Application filed by Mann and Hummel GmbH, Filterwerk Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP1044050A1 publication Critical patent/EP1044050A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0058—Working-up used lubricants to recover useful products ; Cleaning by filtration and centrifugation processes; apparatus therefor

Definitions

  • the invention relates to a method for filtering a liquid according to the features of claim 1.
  • DE 35 37 384 discloses a method for cleaning liquid cooling lubricants.
  • a precoat filter is arranged in a circuit, and filter aids are used in the precoat filter with a highly surface-active and adsorbing substance.
  • These filter aids are, for example, commercially available bleaching earths.
  • a disadvantage of the system is that a filter cake must first be built up from the filter aid so that a sufficient filter fineness is produced. A high level of filter aids is therefore to be expected.
  • Another disadvantage is that a precise dosing of the precoat is problematic due to turbulence and therefore the filtration result may be subject to very strong fluctuations.
  • the invention has for its object to provide a method and an apparatus for filtering a liquid, wherein the amount of filter aid is to be minimized and a high filtration quality is achieved in filtration systems.
  • the advantage of the method is that a precoat is not necessary, but filter aids are added to the dirty liquid to be filtered and a higher degree of cleaning can be achieved.
  • it is proposed to ensure the open-pore structure by appropriate metering of the filter aid. What is important in this measure is, above all, an appropriate grain size of the filter aid or a corresponding pressure resistance of the filter aid in order to avoid caking.
  • the filter aid can be metered in batchwise or continuously.
  • the vaccination is expediently carried out when the contamination is very low or the service life of a filtration system is to be extended.
  • Filter aids can also be added when the system is not in operation and only the quality of the liquid has to be maintained.
  • a further development of the invention provides that the filter aid is premixed with dirt constituents or with the dirt liquid, so that the filter aid is better distributed.
  • corn meal and cellulose can expediently be used.
  • Vaccination with cellulose in particular, achieves a filtration quality that is better than with the alluvial deposits previously used by diatomaceous earth or bleaching earth.
  • Diatomaceous earth in particular should be avoided in the future as it is considered to be hazardous to health.
  • Another advantage of using corn meal or cellulose is that the residue can be easily disposed of.
  • the filter aid increases both the life of the liquid, for example an emulsion.
  • a filter fineness of ⁇ 15 ⁇ is also achieved.
  • the filter systems include, for example, gravity band filter systems, pressure band filter systems or vacuum filter systems.
  • a filter system is only partially washed up, ie the filter aid only in a certain area the effective filter area covered.
  • the main advantage is that two filters can be integrated in a single filter system. It is also possible to carry out the precoat in different densities. This also creates filters with different filter fineness.
  • the basic build-up of the filter aid represents an additional variant.
  • filter aid is initially entered, and then dirty liquid is added.
  • This wash-up has the advantage that the high filter fineness is achieved right at the beginning of the filtration process.
  • the invention has the following improvements over the previously known method:
  • Figure 1 shows the schematic structure of a system for cleaning liquid
  • Figure 2 shows the variant of a system for cleaning liquid cooling lubricants.
  • FIG 1 shows the schematic structure of a system for cleaning liquid cooling lubricants.
  • the cooling lubricant supplied by machine tools (not shown here) and loaded with chips and contaminants is introduced via lines 10, 11, 12 into a dirt container 13. From this dirt container 13, the liquid reaches a precoat filter system 16 via line 14 and a pump 15.
  • a precoat filter system there are usually several candle filters.
  • Such a precoat filter system is known for example from DE 29 08 625 A1.
  • the cleaned liquid leaves the system via line 17 and can be fed back to the machine tools via a clean tank and possibly additional pumps.
  • a line 18 and a valve 19 are arranged at the discharge opening of the precoat filter system 16. When the valve 19 is opened, the dirt and the filter aid are conveyed into a container 20.
  • a filter aid for the alluvial coating comes from a container 21 to a conveyor 22.
  • This conveyor has a metering device 23 and a screw conveyor 24. From here, the filter aid is metered into a container 25 which is filled with oil or suspension. The filter aid and the liquid are mixed with an agitator 26. This means that at the start of the filter, the precoat is provided and pumped to the filter. The precoat filter system is ready for use once the basic precoat has been completed.
  • Oil vaccine substance is continuously or discontinuously added to the filtration circuit via line 27 and valve 28, ie oil vaccine substance is continuously or intermittently inoculated into the filtration circuit with an inoculation pump 29. In order to avoid unnecessary expenditure of energy, this is preferably done by injecting the inoculation substance via the pipeline 27 into the pipeline 14.
  • the dirty liquid pumped over the filter candles is constantly mixed with the inoculant, so that a mixture consisting of inoculum and dirt forms on the filter candles.
  • the porosity of the deposits on the filter candles or the property of the stratification increases and thus enables a very effective and high quality filtration quality.
  • Vaccination also significantly extends the service life.
  • the precoat is provided in a container 30 and from there is a conveyor 31 consisting of metering device 32 and
  • Screw conveyor 33 supplied.
  • the screw conveyor device places the precoat in the container 34, in which there is oil or suspension.
  • the precoat is mixed with the oil or the suspension and fed via line 36 and the valve 37 to the precoat filter system before the start of a filtration process.
  • the basic precoat deposits on the filter candles and forms a first filter layer.
  • the subsequent inoculation of the supplied dirty liquid results in a better quality of the cooling lubricant, i. H. the degree of purity of the cooling lubricants increases.
  • the variant according to Figure 2 shows a structure in which certain parts of the system are duplicated, such as. B. the filter devices or certain feed pumps.
  • the system consists of a clean container 38 in which cleaned cooling lubricants are located, a dirt container 39, two filter devices 40, 41, a vaccination device, consisting of an inoculation tank 42, a metering device 43, a wash-off tank 44 and a corresponding equipment with pumps and pipes.
  • the cooling lubricant to be cleaned arrives from machine tools (not shown here) via lines 45, 46 to the dirt container 39.
  • the dirty liquid is conveyed to the two filter devices 40, 41 via several pumps 48 and lines 49, 50.
  • the supply of filter aids via the lines 51, 52 is provided on the suction sides of these pumps 48.
  • the filter aid for example corn meal, is made available in a container 53 and from there it reaches the inoculation container 42 via a conveyor 54 and a dosing screw 55.
  • the inoculation container contains pure liquid.
  • the filter aid is mixed with the pure liquid in this container.
  • a mixer 56 is provided for this.
  • the pure liquid with the filter aid reaches the suction side of the pumps 48 via feed pumps 57, 58 and the lines 51, 52.
  • the dirty liquid now mixed with filter aid is fed to the filter devices 40, 41.
  • Filter candles are arranged in the filter devices, for example, which have a certain filter fineness and on which the dirt is deposited.
  • the cleaned liquid reaches the clean container 38 via the lines 59, 60 and can be conveyed from there via the pumps 61 and line 70 to the corresponding machine tools.
  • compressed air is supplied via the lines 62, 63. This compressed air displaces the pure liquid and at the same time dehumidifies the filter cake that has formed through the filtration.
  • the filter cake is fed via lines 64, 65 to a flushing tank 44.
  • the dirt is removed from this flushing tank by means of the pump 66 to a pressure band filter 67.
  • This pressure band filter separates the residual moisture from the sludge.
  • the sludge is discharged into the container 68, the residual liquid reaches the dirt container 39 via the line 69.
  • the filter aid can also be entered if there is no contamination. This is a maintenance filtration, which is particularly necessary on weekends and thus enables a longer service life of the cooling lubricant.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'invention concerne un procédé pour la filtration d'un liquide et un dispositif pour la mise en oeuvre de ce procédé. Un récipient permet de faire parvenir un adjuvant de filtration à un appareil de dosage à l'aide d'un appareil d'alimentation, et l'adjuvant de filtration est acheminé, par l'intermédiaire de l'appareil de dosage, à un contenant de vaccin et/ou à un élément filtrant.
EP98965744A 1997-12-04 1998-12-03 Procede pour la filtration d'un liquide Withdrawn EP1044050A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19753717 1997-12-04
DE19753717 1997-12-04
PCT/EP1998/007846 WO1999029396A1 (fr) 1997-12-04 1998-12-03 Procede pour la filtration d'un liquide

Publications (1)

Publication Number Publication Date
EP1044050A1 true EP1044050A1 (fr) 2000-10-18

Family

ID=7850659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98965744A Withdrawn EP1044050A1 (fr) 1997-12-04 1998-12-03 Procede pour la filtration d'un liquide

Country Status (4)

Country Link
US (1) US6555014B1 (fr)
EP (1) EP1044050A1 (fr)
CA (1) CA2312794A1 (fr)
WO (1) WO1999029396A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19946391A1 (de) * 1999-09-28 2001-03-29 Mann & Hummel Filter Verfahren zum Reinigen von Kühlschmierstoffen
DE19963421A1 (de) * 1999-12-28 2001-07-12 Seitz Schenk Filtersystems Gmb Verfahren und Vorrichtung zur Zuführung von Filterhilfsmitteln und/oder technischen Hilfsstoffen während der Filtration
JP2004524132A (ja) * 2000-08-21 2004-08-12 シーメンス　アクチエンゲゼルシヤフト 煙道ガス装置及び浄化剤の供給方法
US20200078894A1 (en) * 2018-09-07 2020-03-12 Manufacturing Productivity Systems Coolant filtration system
CN109652197B (zh) * 2018-12-21 2022-06-17 乳源东阳光优艾希杰精箔有限公司 一种润滑油的回收过滤方法
SE543443C2 (en) 2019-02-08 2021-02-16 Skf Recondoil Ab Purification of oil 11
CN111974041A (zh) * 2020-08-12 2020-11-24 李聪 一种磨床磨削油过滤装置

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1284750A (en) * 1917-04-07 1918-11-12 Refiners Engineering & Supply Company Process for clarifying oil.
US1579171A (en) * 1923-02-13 1926-03-30 Celite Company Process of filtration and treatment of liquids
US2455130A (en) * 1945-11-08 1948-11-30 Mary P Lomax Method of and apparatus for filtering
US3674686A (en) * 1970-02-24 1972-07-04 Laval Turbine Filter precoating method
JPS5613099A (en) * 1979-07-10 1981-02-07 Nichireki Chem Ind Co Ltd Treating method of sludge
DE3121953A1 (de) * 1981-06-03 1982-12-23 Henkel KGaA, 4000 Düsseldorf Verwendung von hochgegluehtem (alpha)-al(pfeil abwaerts)2(pfeil abwaerts)o(pfeil abwaerts)3(pfeil abwaerts) als filtehilfsmittel zur reinigung von alkalischen loesungen
US4454044A (en) * 1981-07-13 1984-06-12 Max Klein Water treatment process
US4510061A (en) * 1981-08-25 1985-04-09 Alar Engineering Corporation Method of filtering
US4507208A (en) * 1983-06-30 1985-03-26 Drilling Waste, Incorporated Process for handling waste from oil well operations
JPS60135483A (ja) * 1983-12-22 1985-07-18 Ngk Insulators Ltd 油の清浄化法
US5062968A (en) * 1987-09-14 1991-11-05 Warning Theodore A Apparatus and process for filtering fluids
DE4110252C1 (fr) * 1990-06-02 1992-02-27 Schenk-Filterbau Gmbh, 7076 Waldstetten, De
US5141526A (en) * 1991-05-20 1992-08-25 Shell Oil Company Fuel preparation from a waste sludge
US5262064A (en) * 1991-09-26 1993-11-16 Florida Institute Of Phosphate Research Dewatering method and agent
US5908561A (en) * 1996-01-16 1999-06-01 Advanced Minerals Corporation Purified natural glass product
AUPN858596A0 (en) * 1996-03-08 1996-04-04 Csl Limited Filtration of plasma precipitates using cellulose filter aid
EP0968040B1 (fr) * 1997-03-13 2003-06-04 FILTERWERK MANN + HUMMEL GmbH Procede d'epuration de refrigerants lubrifiants liquides

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9929396A1 *

Also Published As

Publication number Publication date
CA2312794A1 (fr) 1999-06-17
WO1999029396A1 (fr) 1999-06-17
US6555014B1 (en) 2003-04-29

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