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WO1996041671A1 - Filtre en verre cellulaire - Google Patents

Filtre en verre cellulaire Download PDF

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Publication number
WO1996041671A1
WO1996041671A1 PCT/EP1996/002359 EP9602359W WO9641671A1 WO 1996041671 A1 WO1996041671 A1 WO 1996041671A1 EP 9602359 W EP9602359 W EP 9602359W WO 9641671 A1 WO9641671 A1 WO 9641671A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter according
water
foam glass
filter
production
Prior art date
Application number
PCT/EP1996/002359
Other languages
German (de)
English (en)
Inventor
Lothar Thiele
Hans-Peter Kohlstadt
Werner Fahle
Rainer Tost
Original Assignee
Henkel Kommanditgesellschaft Auf Aktien
TOST, Annebärbel
Tost, Peter
Tost, Frank
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 Henkel Kommanditgesellschaft Auf Aktien, TOST, Annebärbel, Tost, Peter, Tost, Frank filed Critical Henkel Kommanditgesellschaft Auf Aktien
Priority to AU60040/96A priority Critical patent/AU6004096A/en
Publication of WO1996041671A1 publication Critical patent/WO1996041671A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/16—Polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2003—Glass or glassy material
    • B01D39/2006—Glass or glassy material the material being particulate
    • B01D39/2013—Glass or glassy material the material being particulate otherwise bonded, e.g. by resins
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
    • E03B3/06—Methods or installations for obtaining or collecting drinking water or tap water from underground
    • E03B3/08—Obtaining and confining water by means of wells
    • E03B3/16—Component parts of wells
    • E03B3/18—Well filters
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/08—Screens or liners
    • E21B43/082—Screens comprising porous materials, e.g. prepacked screens
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
    • C04B2111/00284—Materials permeable to liquids
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/152—Water filtration

Definitions

  • the invention relates to a filter made of a solid layer bonded with a polyurethane binder for the collection and lifting of groundwater for the treatment of industrial and drinking water or for the infiltration of water into the ground and for sealing off water veins, as well as its manufacture and use.
  • Such filters with a flow rate of 0 to 3 m 3 / min ⁇ m 2 are known.
  • DE 4310725 describes a filter made of a solid layer of quartz sand bonded with polyurethane adhesive. It is characterized in that the polyurethane binder contains, in addition to the polyol and the polyisocyanate, an organotin compound with a molecular weight of more than 600 as a catalyst and a mixture of highly disperse silica and / or bentonite with a thickening of alumino-silicates as a modifier.
  • a filter is also made from a polyurethane binder and quartz sand.
  • the water permeability of the filter is greatly reduced by adding water to the polyol.
  • quartz sand or gravel is used as the filter material. No other filter materials are mentioned.
  • the filter materials made from it are very heavy, which is particularly noticeable when transporting and assembling the wells from the individual filter elements.
  • Foam glass is a solidified glass foam with airtight cells that are filled with gas.
  • the foam glass is in round, preferably spherical, particles.
  • Their grain size is in the range from 0.2 to 16 mm, in particular in the range from 0.5 to 4 mm.
  • the grain density for the large particles is approx. 0.25 kg / dm 3 and for the smaller particles it is approx. 0.75 kg / dm 3 . It is preferably in the range from 0.3 to 0.5 kg / dm 3 .
  • the grain strength of the glass foam particles is in the range between 2 and 20 KM according to ghost, in particular between 10 and 15.
  • the bulk density of the foam glass particles is in the range between 100 and 400 kg / m 3 , in particular in the range from 150 to 300 kg / m 3 .
  • the glass is an inorganic glass based primarily on the oxides of the following metals: Si, Al, Ca, Mg, Na and K.
  • the glass foam can be made synthetically as well as of natural origin. In the case of natural glass foams especially tufa. Pumice sand or gravel and expanded clay can also be used.
  • the quantity ratio of foam glass: polyurethane binder is less than 5: 1, in particular less than 3: 1.
  • Polyurethane binder is understood to mean an adhesive which consists of polyisocyanates, polyols, catalysts, modifiers and fillers and, if appropriate, water.
  • a two-component polyurethane adhesive is preferably used, a low molecular weight polyisocyanate and a likewise relatively low molecular weight polyol, which contains the further additives, being mixed only shortly before they are used.
  • the polyhydroxy polyethers known per se in the molecular weight range from 60 to 10,000, preferably 70 to 6000, with 2 to 10 hydroxyl groups per molecule are particularly suitable.
  • Such polyhydroxy polyethers are obtained in a manner known per se by alkoxylation of suitable starter molecules, e.g. of water, propylene glycol, ethylene glycol, glycerin, trimethylolpropane.
  • suitable alkoxylating agents are in particular propylene oxide and possibly also ethylene oxide.
  • the water content is in the range from 0 to 7.5% by weight, based on the polyol component. If filters with a high water permeability are to be produced, the water content should be below 0.3% by weight and, if possible, 0% by weight. If, on the other hand, the water flow rate is to be low or even practically 0, then a water content of more than 0.3% by weight should be used, in particular 0.5 to 2.5% by weight.
  • the water flow rate is 3 m 3 / min ⁇ m 2 when 2 parts by weight of foam glass with 1 part by weight of binder without water are used, and 0 m 3 / min. m 2 if the binder contains 1.1% water.
  • All polyvalent aromatic and aliphatic isocyanates are suitable as polyisocyanates. They preferably contain on average 2 to at most 4 NCO groups. Aromatic isocyanates are preferred, especially diphenylmethane diisocyanate.
  • the polyisocyanate is used with an up to 30% excess of isocyanate, based on the polyol, preferably with a 10 to 25% excess.
  • the polyurethane binder contains an organotin compound with a molecular weight of more than 600 as a catalyst and a highly disperse silica and / or bentonite.
  • organotin compound is used as the catalyst.
  • organotin compound means a compound with one or more Sn-C bonds. Specific compounds are: dibutyl and dioctyl-tin dilaurate, dioctyl-tin di-2-ethylhexoate, dibutyl and dioctyl-tin distearate, dibutyl and dioctyl-tin didodecyl thiolate, butyl and octyl-tin trisate (thioglyutyl) disodium (2) tin bis (thioglycolic acid 2-ethylhexoate), tributyl and trioctyl tin (thioglycolic acid 2-ethylhexoate) as well as tributyl and trioctyl tin tris (thioethylene glycol 2-ethylhexoate), tributyl and trioctyl tin
  • the organotin compounds can be used individually or in a mixture, in an amount of 0.001 to 0.5, preferably 0.01 to 0.25% by weight, based on the polyol.
  • Highly disperse silica is understood to mean a silica with a SiO 2 content of over 99.8% by weight, which was produced by hydrolysis of silicon tetrachloride in a detonating gas flame. It is e.g. commercially available under the trademark "Aerosil”.
  • Bentonite means contaminated clays that have arisen from the weathering of volcanic tuffs.
  • products with the "Bentone” trademark are used.
  • a "thickening of alumino-silicates" is used to produce filters with a high water flow rate.
  • the absorber paste is preferred, in particular based on castor oil. This is to make moisture in the PUR components harmless.
  • the alumino-silicate concentration depends on the moisture to be expected and is generally 1 to 12, in particular 2 to 8,% by weight, based on the polyol.
  • the polyol can also contain 0 to 70, in particular 10 to 60% by weight of at least one filler. It not only serves to increase the weight and volume, but also to improve the technical usability.
  • the grain size of the filler is up to 0.05 mm.
  • Suitable antioxidants are in particular up to 1.5% by weight of Irganox 1010, 1076, 3114 and 1425 from Ciba Geigy, Topanol 0 from ICI, and Goodrite 3114 from Goodrich.
  • Tinuvin P, 328 and 144 (Ciba Geigy), Sanduvor VSU and 3035 (Sandoz), Chimassorb 81 from Chimosa are particularly suitable as UV absorbers.
  • Tinuvin 865 and 770 from Ciba Geigy, Sanduvor 3050, 3051 and 3052 from Sandoz and Chimassorb 119 from Chimosa and Mark LA 62, 63, 67 and 68 from Argus Chemical Corporation.
  • composition and amount of the binder must be matched to the grain size of the foam glass, in particular its dust content, and to the specific conditions of use, in particular the strengths and the water flow rate.
  • the reduction in grain size increasingly requires a special modification of the binder.
  • Concrete operating conditions are understood primarily as the sieve lines of the geological material of an aquifer.
  • a laminar groundwater flow into the well is usually achieved using a gravel fill between the aquifer and filter. It works Wall of the filter described as a second bed of gravel and reinforces the effect of the laminar flow.
  • the weight ratio of foam glass: polyurethane binder is preferably less than 5: 1, in particular equal to or less than 3: 1.
  • the filter material generally consists of 60 to 75% by weight of foam glass and 25 to 40% by weight of polyurethane adhesive.
  • the polyurethane adhesive generally consists of 50 to 99% by weight of isocyanate / polyol reactive resin, which may contain water, 0.001 to 0.5% by weight of organotin compounds, 0.03 to 2.5% by weight. % of silica and / or bentonite, 1 to 12% by weight of aluminosilicate and 0 to 70% by weight of fillers, where the polyol can contain 0 to 7.5% by weight of water, based on the polyol .
  • the filter is preferably free of additional elements for increasing the mechanical strength. It consists of the foam glass with its glass dust content and the polyurethane binder system.
  • the geometrical shape of the filter is arbitrary and depends on the specific application.
  • the filters can in particular represent plates or pipes. They are preferably circular, cylindrical tubes with a length that is easy to handle. Diameter and thickness depend on the size and length of the well made from it.
  • the filters are made by adding the polyurethane binder system to the foam glass with a given amount of glass dust.
  • the two polyurethane components that Contain catalysts and modifiers first mixed together and then added to the foam glass. Now the mixture is mixed thoroughly and put into a mold. The mixture is then heated to a temperature of over 120 ° C., in particular to a temperature between 125 to 150 ° C. for at most 10 minutes. The mold is removed without cooling.
  • the filters obtained in this way can be used immediately after cooling to room temperature, ie they can be used in drinking water production without further treatment.
  • the curing process according to the invention is therefore very economical, since conventional polyurethane adhesives require very long curing times at temperatures of over 100 ° C. if the filtrate is to be of drinking water quality.
  • the filters according to the invention are suitable for extracting industrial and drinking water from groundwater or for infiltrating water into the soil. Due to the freely adjustable water penetration rates, wells can be built that exclude the connection of different aquifers by providing aquifers with unwanted water through water-impermeable pipes, the so-called full pipes with a water permeability of 0 m 3 / min. m * ⁇ be expanded. Layers of earth with the water to be discharged, however, are expanded with water-permeable filters.
  • the use of the filter according to the invention using foam glass with a fine grain fraction of less than 0.25 mm in diameter allows - particularly advantageous in combination with polyol / water mixtures - the production of filters with different water penetration rates, and at relatively low costs due to the low consumption of polyurethane binders.
  • foam glass instead of sand or gravel reduces the weight of the filter by a factor of up to approx. 5.
  • the strength in the wet state is only reduced by a factor of approx. 2.
  • Example 1 Production of a filter tube with foamed glass particles
  • the resin component consists of
  • the hardener component consists of diphenylmethane-4,4'-diisocyanate. 100 parts by weight of the resin are mixed with 55 parts by weight of the hardener at about 20 ° C. using a dynamic mixer and then mixed in a screw mixer with twice the amount of foamed glass particles with a particle size between 1 and 4 mm. These are glass particles with the trade name Poraver (manufacturer: Dennert Poraver GmbH 96130 réellefeld, Federal Republic of Germany). A 1: 1 mixture of these particles with a grain size distribution of 1 to 2 mm (grain density 0.40 ⁇ 0.07 kg / dm 3 ) and 2 to 4 mm (grain density 0.34 + 0.06 kg / dm 3 ) used.
  • This mixture is introduced into a tube shape with a length of 1 m and cured at 135 ° C. for 9 minutes. After that time leaves the filter tube can be removed from the mold practically without cooling, without sticking to the mold wall.
  • the filter tube After the filter tube has cooled to room temperature, it can be used immediately at a defined water flow rate according to the selected grain size. According to the example described, the water flow rate is about 3 m 3 / min. m 2 .
  • the filter tube weighs 18 kg.
  • a corresponding filter tube with sand as filter material weighs 70 kg.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ceramic Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Dispersion Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Fluid Mechanics (AREA)
  • Materials Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Filtering Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention décrit un filtre léger dans lequel du verre cellulaire est lié par des liants polyuréthanne. Même sans solidification mécanique, on obtient ainsi des éléments de puits pour une profondeur d'au moins 80 m. Le filtre est particulièrement adapté pour extraire de l'eau potable des eaux souterraines dans les régions de mines à ciel ouvert.
PCT/EP1996/002359 1995-06-08 1996-05-31 Filtre en verre cellulaire WO1996041671A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU60040/96A AU6004096A (en) 1995-06-08 1996-05-31 Foamed glass filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19520367A DE19520367A1 (de) 1995-06-08 1995-06-08 Filter
DE19520367.4 1995-06-08

Publications (1)

Publication Number Publication Date
WO1996041671A1 true WO1996041671A1 (fr) 1996-12-27

Family

ID=7763584

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/002359 WO1996041671A1 (fr) 1995-06-08 1996-05-31 Filtre en verre cellulaire

Country Status (4)

Country Link
AU (1) AU6004096A (fr)
DE (1) DE19520367A1 (fr)
WO (1) WO1996041671A1 (fr)
ZA (1) ZA964874B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1115182C (zh) * 1998-04-20 2003-07-23 刘澄清 用于囊式过滤器的充排水装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1900697A1 (fr) 2006-09-12 2008-03-19 "TECHNOPOR" Handels GmbH Granulés de verre mousse fabriqués de manière synthétique
DE102008063815A1 (de) 2008-12-19 2010-06-24 Hans-Peter Kohlstadt Offenporiger Formkörper
DE202008016807U1 (de) 2008-12-19 2010-05-20 Kohlstadt, Hans-Peter Offenporiger Formkörper

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1013376A (en) * 1961-07-24 1965-12-15 Siporex Int Ab Synthetic resin-bonded concrete
DE4310725A1 (de) * 1993-04-02 1994-10-06 Henkel Kgaa Filter
DE4445382C1 (de) * 1994-12-20 1996-02-22 Henkel Kgaa Rohr aus einer mit Polyurethan-Klebstoff gebundenen Feststoffschicht aus Quarzsand und Verfahren zur Herstellung des Rohres sowie seine Verwendung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE290961C (fr) *
DE3107805A1 (de) * 1981-02-28 1982-12-09 Peter 2915 Saterland Mack Schaumzementkuchenverfahren zur herstellung von filtermasse
DD291013A5 (de) * 1989-12-28 1991-06-20 Veb Trisola Steinach,De Glasfilter und verfahren zu seiner herstellung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1013376A (en) * 1961-07-24 1965-12-15 Siporex Int Ab Synthetic resin-bonded concrete
DE4310725A1 (de) * 1993-04-02 1994-10-06 Henkel Kgaa Filter
DE4445382C1 (de) * 1994-12-20 1996-02-22 Henkel Kgaa Rohr aus einer mit Polyurethan-Klebstoff gebundenen Feststoffschicht aus Quarzsand und Verfahren zur Herstellung des Rohres sowie seine Verwendung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1115182C (zh) * 1998-04-20 2003-07-23 刘澄清 用于囊式过滤器的充排水装置

Also Published As

Publication number Publication date
ZA964874B (en) 1997-03-20
DE19520367A1 (de) 1996-12-12
AU6004096A (en) 1997-01-09

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