CH493569A - Regeneration of alusial agent from vistose - Google Patents
Regeneration of alusial agent from vistoseInfo
- Publication number
- CH493569A CH493569A CH1059169A CH1059169A CH493569A CH 493569 A CH493569 A CH 493569A CH 1059169 A CH1059169 A CH 1059169A CH 1059169 A CH1059169 A CH 1059169A CH 493569 A CH493569 A CH 493569A
- Authority
- CH
- Switzerland
- Prior art keywords
- filter medium
- grain size
- impurities
- microns
- regeneration
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F13/00—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like
- D01F13/02—Recovery of starting material, waste material or solvents during the manufacture of artificial filaments or the like of cellulose, cellulose derivatives or proteins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D41/00—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids
- B01D41/02—Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of loose filtering material
-
- 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
- B01J20/26—Synthetic macromolecular compounds
- B01J20/261—Synthetic macromolecular compounds obtained by reactions only involving carbon to carbon unsaturated bonds
-
- 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
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
-
- 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
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3425—Regenerating or reactivating of sorbents or filter aids comprising organic materials
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Regeneration of alluvial agent from viscose filtration. Contaminated, plastic-powder alluvial filter medium is freed from impurities by wet classification and subjected to flow classification to adjust its grain size. - Specifically, the filter medium is a mixture of polyvinyl chloride and suspension polymer whose fine particles have a grain size of 15-100 mu, its coarse particles a grain size of 80-200 mu.
Description
Verfahren zur Regeneration von Anschwemm-Mittel aus der Viskosefiltration unter Beeinflussung des Korngrösseverhältnisses Die Erfindung betrifft ein Verfahren zur Regenera tion des zur Filtration von Viskose gebrauchten An schwemm-Mittels nach Hauptpatent Nr. 436 241. Nach diesem Patent geschieht die Regeneration dadurch, dass die Filterrückstände unter vollständiger Aufschlämmung der Anschwemm-Filtermittel mit einer Flüssigkeit behan delt und die Verunreinigungen von den Anschwemm- Filtermitteln getrennt werden.
Die Abtrennung geschieht im wesentlichen durch Nassklassierung. Als Filterhilfs mittel hat sich Kunststoffpulver, vorzugsweise Polyvi- nylchlorid als Suspensionspolymerisat in Korngrössen von 15 bis 200 Mikron, bestens bewährt und es hat sich gezeigt, dass ein Optimum in Klärung und Filterstandzeit erreichbar ist, wenn je nach der Qualität der Viskose und der Art ihrer Verunreinigungen ein Gemisch aus Kunst stoffpulver verschiedener Korngrösse angewandt wird, wobei durch Änderung des Verhältnisses der Gemischan teile eine optimale Anpassung an die jeweiligen Bedin gungen möglich ist.
Für die Erfindung war die Aufgabe massgebend, die Regeneration des Anschwemm-Mittels so zu leiten, dass die zur Erreichung der optimalen Filterleistung günstigste Mischung der Korngrössenanteile in dem regenerierten Filtermittel je nach den Eigenschaften der zu filtrieren den Viskose gewählt werden kann.
Das Verfahren nach der Erfindung löst die Aufgabe dadurch, dass aus einem aus Kunststoffpulver bestehen den, nach Gebrauch verunreinigten Anschwemm-Filter- mittel zuerst die Verunreinigungen durch Nassklassieren entfernt werden, und dass das so gereinigte Anschwemm- Filtermittel anschliessend einer Strömungsklassierung, zwecks Einstellung seiner Korngrössenverteilung ausge setzt wird.
Auf der Zeichnung ist ein Hiess-Schema der zur Durchführung des Verfahrens beispielsweise anwendba ren Anlage dargestellt. Von dem mit einer rotierenden Siebtrommel ausgestatteten Nassklassierer 1 wird das im trichterförmigen Bodenteil dieses Apparates gesammelte, von groben Verunreinigungen befreite Filtermittel, ein Gemisch aus Polyvinylchlorid-Suspensionspolymerisat der beiden Korngrössenbereiche 15 bis 100 Mikron und 80 bis 200 Mikron,
zusammen mit dem zur Nassklassie- rung verwendeten Wasser mittels einer Exzenterschnek- kenpumpe 2 abgesaugt und in den als Strömungsklassie- rer arbeitenden Behälter 3 geleitet. In diesem Behälter sammeln sich die Filtermittelteilchen im Bodenteil, wäh rend die im Vorreiniger 1 noch nicht entfernten feinen Fasern und Schmutzpartikel durch einen Überlauf, zu sammen mit dem beigemischten Waschwasser abgeleitet werden.
Eine Niveauregelung sorgt dafür, dass im Behäl ter 3 das Filtermittel nur bis zu einer vorbestimmten Höhe steigen und kein Verlust durch Überlauf eintreten kann.
Aus dem Bodenteil des Behälters 3 wird durch eine Exzenterschneckenpumpe 4 das aus Anteilen verschiede ner Korngrösse bestehende Filtermittel zusammen mit Wasser abgezogen und in den Behälter 5 tangential eingeführt. Diese Pumpe 4 ist mit einem drehzahlregu lierbaren Antrieb versehen, so dass ihre Leistung und damit die Strömungsgeschwindigkeit im Behälter 5 ver ändert werden kann.
Aus dem konischen Unterteil des Behälters 5 wird durch eine Dosierpumpe 7, eine Exzen- terschnecken- oder Membranpumpe mit einstellbarer Mengenleistung, der aus Filtermittel und Wasser beste hende Schlamm abgezogen und in den Mischbehälter 8 gegeben, der die zu filtrierende Viskose enthält, die mit einer Pumpe laufend der Filteranlage zugeleitet wird. Aus dem Oberteil des Behälters 5 führt eine Leitung in den Behälter 6, in welchem das für die Voranschwem- mung der Filteranlage nötige Filtermittel gesammelt und bis zur Neuanschwemmung bereitgehalten wird.
Bei starkem Zufluss in den Behälter 5 wirkt dieser nach Art eines Hydrozyklon, die feinen Anteile werden nach oben und zum Behälter 6 geführt, während sich die groben Anteile des Filtermittels unten ansammeln, von wo sie durch die Dosierpumpe 7 abgezogen und der zu filtrie renden Viskose im Mischbehälter 8 beigcgeben werden. Bei langsamem Durchfluss, bei langsamem Lauf der Pumpe 4, ergibt sich im Behälter 5 nur geringe Strömung, die keine Klassierung bewirkt, so dass das von der Dosierpumpe 7 abgezogene Filtermittel etwa dieselbe Korngrössenverteilung aufweist wie im Behälter 3.
Durch Veränderung der Drehzahl der Pumpe 4 bietet sich so die Möglichkeit, das Verhältnis der feinen und groben Antei le des Filterhilfsmittels zu beeinflussen, wodurch die Filterleistung bei verschiedenen Viskosequalitäten jeweils zu einem optimalen Wert gebracht werden kann.
Process for the regeneration of precoat from viscose filtration by influencing the grain size ratio The invention relates to a process for the regeneration of the precoat used for the filtration of viscose according to main patent no. 436 241. According to this patent, the regeneration is done by removing the filter residue treated with complete suspension of the precoat filter media with a liquid and the impurities are separated from the precoat filter media.
The separation takes place essentially by wet classification. As a filter aid, plastic powder, preferably polyvinyl chloride as a suspension polymer in particle sizes of 15 to 200 microns, has proven to be very effective and it has been shown that an optimum in clarification and filter service life can be achieved if, depending on the quality of the viscose and the type of it Impurities a mixture of plastic powder of different grain sizes is used, whereby an optimal adaptation to the respective condi tions is possible by changing the ratio of the mixture.
The main task of the invention was to direct the regeneration of the precoat in such a way that the most favorable mixture of the grain size fractions in the regenerated filter medium to achieve the optimum filter performance can be selected depending on the properties of the viscose to be filtered.
The method according to the invention solves the problem in that the precoat filter medium made of plastic powder, contaminated after use, is first removed by wet classification, and that the precoated filter medium cleaned in this way is then flow classification for the purpose of adjusting its grain size distribution is suspended.
The drawing shows a Hiess diagram of the system, for example applicable for carrying out the method. From the wet classifier 1, which is equipped with a rotating sieve drum, the filter medium, which has been freed from coarse impurities and collected in the funnel-shaped bottom part of this apparatus, is a mixture of polyvinyl chloride suspension polymer of the two grain size ranges 15 to 100 microns and 80 to 200 microns,
Sucked off together with the water used for wet classification by means of an eccentric screw pump 2 and fed into the container 3, which works as a flow classifier. In this container, the filter medium particles collect in the bottom part, while the fine fibers and dirt particles not yet removed in the pre-cleaner 1 are diverted through an overflow, together with the added wash water.
A level control ensures that the filter medium in the container 3 only rises up to a predetermined height and that no loss can occur through overflow.
From the bottom part of the container 3, the filter medium consisting of fractions of various ner grain size is withdrawn together with water by an eccentric screw pump 4 and introduced into the container 5 tangentially. This pump 4 is provided with a speed regulatable drive so that its performance and thus the flow rate in the container 5 can be changed ver.
From the conical lower part of the container 5, a metering pump 7, an eccentric screw or diaphragm pump with adjustable volume capacity, the existing sludge drawn from filter medium and water and given into the mixing container 8, which contains the viscose to be filtered, which with a Pump is continuously fed to the filter system. A line leads from the upper part of the container 5 into the container 6, in which the filter medium necessary for the pre-alluviation of the filter system is collected and held ready until the new alluvial surface is deposited.
When there is a strong inflow into the container 5, this acts like a hydrocyclone, the fine fractions are led upwards and to the container 6, while the coarse fractions of the filter medium collect at the bottom, from where they are drawn off by the metering pump 7 and the viscose to be filtered be added in the mixing container 8. With slow flow, with slow running of the pump 4, there is only a small flow in the container 5, which does not cause any classification, so that the filter medium withdrawn from the metering pump 7 has approximately the same grain size distribution as in the container 3.
By changing the speed of the pump 4, it is possible to influence the ratio of the fine and coarse fractions of the filter aid, whereby the filter performance can be brought to an optimal value for different viscose qualities.
Claims (1)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1059169A CH493569A (en) | 1963-05-28 | 1969-07-09 | Regeneration of alusial agent from vistose |
BE751298D BE751298R (en) | 1969-07-09 | 1970-06-02 | PROCESS FOR FILTRATION OF SYNTHETIC SHEET AND ARTIFICIAL SILK SPINNING MASSES BY FILTERING SURFACES CHARGED WITH AN AGENT |
FR707023909A FR2051611B2 (en) | 1969-07-09 | 1970-06-26 | |
US51769A US3674146A (en) | 1969-07-09 | 1970-07-02 | Method of regenerating filter aids |
JP45059403A JPS4839767B1 (en) | 1969-07-09 | 1970-07-07 | |
DE19702033688 DE2033688C3 (en) | 1969-07-09 | 1970-07-07 | Process for the filtration of viscose spinning masses |
GB33498/70A GB1292168A (en) | 1969-07-09 | 1970-07-09 | Process for the filtration of viscose solutions |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH662163A CH407950A (en) | 1963-05-28 | 1963-05-28 | Process for the filtration of liquids that are difficult to filter |
CH696263A CH415555A (en) | 1963-06-05 | 1963-06-05 | Process for the filtration of liquids with the help of easily regenerable filter aids |
CH900463A CH436241A (en) | 1963-07-17 | 1963-07-17 | Process for the regeneration of precoat agents from viscose filtration |
CH950463A CH467808A (en) | 1963-05-28 | 1963-07-30 | Process for the regeneration of precoat from viscose filtration |
CH1429163A CH466852A (en) | 1963-05-28 | 1963-11-20 | Process for the regeneration of precoat filter media from viscose filtration |
CH1059169A CH493569A (en) | 1963-05-28 | 1969-07-09 | Regeneration of alusial agent from vistose |
Publications (1)
Publication Number | Publication Date |
---|---|
CH493569A true CH493569A (en) | 1970-07-15 |
Family
ID=27543786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1059169A CH493569A (en) | 1963-05-28 | 1969-07-09 | Regeneration of alusial agent from vistose |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH493569A (en) |
-
1969
- 1969-07-09 CH CH1059169A patent/CH493569A/en unknown
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Legal Events
Date | Code | Title | Description |
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PLZ | Patent of addition ceased |