DK166530B

DK166530B - Liquid filter unit

Info

Publication number: DK166530B
Application number: DK75590A
Authority: DK
Inventors: Kristian Svendsen
Original assignee: F F Melk A S
Priority date: 1990-03-22
Filing date: 1990-03-22
Publication date: 1993-06-07
Also published as: DK166530C; DK75590D0; DK75590A

Description

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Opfindelsen omhandler et væskefiltreringsanlæg til kontinuerlig filtrering og af den art, som er angivet i indledningen til krav 1.The invention relates to a liquid filtration system for continuous filtration and of the kind specified in the preamble of claim 1.

Anlæg af denne art kendes fra DE fremlæggelses-5 skrifterne nr. 3641658 og nr. 3822485. Ved disse kendte anlæg føres filterdugen ned langs den indvendige side af den første lodrette endevæg og ned til beholderens dybeste punkt. Her føres den rundt om en lederulle og op langs den perforerede bundflade til beholderens øverste 10 kant.Installations of this kind are known from DE submission notices 3641658 and No. 3822485. In these known installations the filter cloth is passed down along the inside of the first vertical end wall and down to the deepest point of the container. Here it is passed around a guide roller and up along the perforated bottom surface to the top 10 edge of the container.

Disse anlæg kan dog kun bruges effektivt, hvis procesvæsken indeholder meget få og små bestanddele. Er dette ikke tilfældet, vil lederullen køre fast og må ustandselig renses.However, these plants can only be used effectively if the process liquid contains very few and small constituents. If this is not the case, the guide roller will jam and must be constantly cleaned.

15 Opfindelsen har til formål at tilvejebringe et filtreringsanlæg, hvor filterbåndet kan fremføres uhindret, selvom der er en væsentlig mængde bestanddele i procesvæsken. Ifølge opfindelsen opnås dette ved, at anlægget er udført på den måde, som er angivet i den 20 kendetegnende del af krav 1. Herved kan filterdugen tilføres til den skrå bund helt uden brug af en lederulle inde i beholderen, og anlægget kan derfor arbejde på driftsikker måde nærmest uanset tykkelsen af det partikellag, der samler sig på filterdugen.The object of the invention is to provide a filtration plant in which the filter belt can be conveyed unhindered, even if there is a significant amount of constituents in the process liquid. According to the invention, this is achieved in that the plant is designed in the manner specified in the characterizing part of claim 1. Hereby the filter cloth can be supplied to the sloping bottom completely without the use of a guide roller inside the container, and the plant can therefore work on reliable manner virtually regardless of the thickness of the particle layer that accumulates on the filter cloth.

25 Der kan fortsat benyttes en lederulle, nemlig til fremstyring af filterdugen imod den nævnte indføringsspalte med et forløb svarende til retningen langs bundpladen, således at dugen kan indføres på ubesværet måde med et i hovedsagen retlinet forløb gennem spalten.A guide roller can still be used, namely for guiding the filter cloth against the said insertion gap with a course corresponding to the direction along the bottom plate, so that the cloth can be inserted in an effortless manner with a substantially rectilinear course through the gap.

30 Denne lederulle vil slet ikke komme i berøring med procesvæsken.30 This guide roller will not come into contact with the process liquid at all.

Opfindelsen forklares nærmere i det følgende under henvisning til tegningerne.The invention is explained in more detail below with reference to the drawings.

Fig. 1 viser en principskitse af et anlæg ifølge 35 opfindelsen, set fra siden 2FIG. 1 shows a principle sketch of a plant according to the invention, seen from the side 2

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Fig. 2 er et udsnit af Fig. 1, som viser filterdugens indførelse i anlæggetFIG. 2 is a section of FIG. 1, which shows the introduction of the filter cloth into the plant

Fig. 3 er et udsnit af Fig. 1, som viser væskefordeler en.FIG. 3 is a section of FIG. 1, which shows liquid distributors one.

5 Filtreringsanlægget som vist i Fig. 1 består af en beholder med to lodrette sidevægge og en lodret endevæg 9. Beholderen har en skråbund 18, som er placeret i en vinkel på 20-25 grader i forhold til vandret. Bunden 18 er forsynet med huller, som eventuelt er forskudt for 10 hinanden eller er anbragt på en hvilken som helst anden måde, som det er kendt fra de traditionelle filtreringsanlæg. For at få en bedre styring på filterdugen 3,10 er en smal kant rundt om hele skråbunden ikke perforeret. Beholderen kan yderligere være indrettet såle-15 des, at den perforerede bund kan udskiftes, således at skråbunden 18 kan have forskellige hulstørrelser og antal af huller alt efter, hvad der skal filtreres. Beholderen er yderligere forsynet med en niveaumåler 4, således at det er muligt at regulere væskehøjden i be-20 holderen.5 The filtration system as shown in Fig. 1 consists of a container with two vertical side walls and a vertical end wall 9. The container has a sloping bottom 18, which is located at an angle of 20-25 degrees relative to the horizontal. The bottom 18 is provided with holes, which are optionally offset from each other or arranged in any other way, as is known from the traditional filtration systems. For better control of the filter cloth 3,10, a narrow edge around the entire sloping bottom is not perforated. The container can further be arranged so that the perforated bottom can be replaced, so that the inclined bottom 18 can have different hole sizes and number of holes depending on what is to be filtered. The container is further provided with a level meter 4, so that it is possible to regulate the liquid height in the container.

Mellem den skrå bund 18 og beholderens bagvæg 9 er der en smal åbning, som forløber i hele anlæggets bredde. Nederst på bagvæggen og ca. vinkelret på denne er der fastgjort en plade 6 af et forholdsvis blødt materi-25 aie. Pladen 6 er fastgjort således, at den slutter tæt an mod skråbunden 18, uden dog at være fastgjort til denne. Der dannes derved en smal spalte, hvorigennem filterdugen 3,10 kan føres. Pladen 6 danner samtidigt en kontraventil, som forhindrer væske i at løbe ud gennem 30 spalten. En anelse af væsken i beholderen kan muligvis sive igennem det stykke af filterdugen, der ligger umiddelbart under pladen. Dette har dog ingen betydning, idet den væske, der siver igennem, samtidigt bliver filtreret.Between the sloping bottom 18 and the rear wall 9 of the container there is a narrow opening which extends along the entire width of the plant. At the bottom of the back wall and approx. perpendicular to this, a plate 6 of a relatively soft material is attached. The plate 6 is fixed so that it adjoins tightly against the inclined bottom 18, without, however, being attached to it. A narrow gap is thereby formed, through which the filter cloth 3,10 can be passed. The plate 6 simultaneously forms a non-return valve which prevents liquid from flowing out through the gap. A hint of the liquid in the container may seep through the piece of filter cloth immediately below the plate. However, this has no significance, as the liquid that seeps through is simultaneously filtered.

35 Filterdugen 3,10 føres ind i beholderen fra en filterrulle 13, som er anbragt på en hylde, fastgjort påThe filter cloth 3,10 is fed into the container from a filter roller 13, which is placed on a shelf, fixed on

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3 en ikke vist måde til beholderens bagvæg 9. Mellem hyldens kant og bagvæggen 9 er der et mellemrum. Hylden er anbragt i en vinkel, således at filterrullen 13 ligger tæt an mod beholderens bagvæg 9, når den er anbragt på 5 denne. Filterdugen 3,10 føres ned i det mellemrum, der er mellem skråhylden og beholderens bagvæg. Derefter føres dugen ned om en letløbende lederulle 11. Lederullen er anbragt således, at dugen fra det punkt, hvor den forlader lederullen 11, holdes i en vinkel, som er den 10 samme som den vinkel, den skrå bund 18 har i forhold til vandret.3 a way not shown for the rear wall of the container 9. Between the edge of the shelf and the rear wall 9 there is a space. The shelf is arranged at an angle so that the filter roller 13 lies close to the rear wall 9 of the container when it is placed on it. The filter cloth 3,10 is lowered into the space between the sloping shelf and the rear wall of the container. Then the tablecloth is lowered around an easily running guide roller 11. The guide roller is arranged so that the tablecloth from the point where it leaves the guide roller 11 is kept at an angle which is the same as the angle of the inclined bottom 18 relative to the horizontal. .

Når dugen forlader den skrå bund 18, føres den op over endnu en letløbende lederulle 2. Denne rulle er anbragt således, at dens overkant er i samme højde, som 15 bundpladens øverste kant. Ved lederullen 2 er anbragt en afskraberkant 1, således at filterkagen 15 skrabes af dugen, når denne føres over lederullen 2.When the cloth leaves the sloping bottom 18, it is passed up over another easy-running guide roller 2. This roller is arranged so that its upper edge is at the same height as the upper edge of the bottom plate. A scraper edge 1 is arranged at the guide roller 2, so that the filter cake 15 is scraped off the cloth when it is passed over the guide roller 2.

Filterkagen 15 falder derefter ned i en særskilt beholder 14. Det er en væsentlig fordel, at filterkagen 20 15 adskilles fra filterdugen 3,10, da dette kan give anledning til et eventuelt genbrug af filterrullen eller af filterkagen. I hvert fald er det nemmere at komme af med affaldet, når det er adskilt. Yderligere bevirker det, at filterdugen 3,10 kan rulles strammere op, hvil-25 ket bevirker en væsentlig pladsbesparelse.The filter cake 15 then falls into a separate container 14. It is a significant advantage that the filter cake 20 15 is separated from the filter cloth 3,10, as this can give rise to a possible reuse of the filter roll or of the filter cake. In any case, it is easier to get rid of the waste when it is separated. Furthermore, it means that the filter cloth 3,10 can be rolled up tighter, which results in a significant saving of space.

Fra lederullen 2 føres filterdugen ned på en spole 16, hvorpå dugen rulles op. Spolen 16 er anbragt således, at dugen 3,10 trækkes skråt indad i forhold til lederullen 2. Dette giver en ekstra tæt oprulning af 3 0 dugen.From the guide roller 2, the filter cloth is lowered onto a spool 16, whereupon the cloth is rolled up. The spool 16 is arranged so that the cloth 3,10 is pulled obliquely inwards relative to the guide roller 2. This gives an extra tight winding of the cloth.

Der skal kun en gearmotor til at føre filterdugen igennem anlægget. Motoren er anbragt således, at den trækker oprulningsspolen 16. Det er særligt fordelagtigt, hvis trækket er jævnt fordelt over hele spolens 35 bredde. Dette bevirker, at man kan benytte filtermateriale af en mindre styrke, hvilket kan være en stor økono-All that is needed is a gear motor to guide the filter cloth through the system. The motor is arranged so that it pulls the winding spool 16. It is particularly advantageous if the pull is evenly distributed over the entire width of the spool 35. This means that filter material of a smaller strength can be used, which can be a great economic

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4 mi sk fordel.4 mi sk advantage.

På filterdugen 10 kan der mellem lederullen 11 og filterrullen 13 anbringes en føler, som - når dugen imellem de to ovennævnte steder bliver slap, kan give et 5 signal til, at filterrullen er tom og skal skiftes.A sensor can be placed on the filter cloth 10 between the guide roller 11 and the filter roller 13, which - when the cloth between the two above-mentioned places becomes slack, can give a signal that the filter roller is empty and must be replaced.

Væskefordeleren, som ses i Fig. 3, består af et aflangt kammer, der er anbragt på tværs over filtreringsbeholderen i nærheden af dennes bægvæg 9. Kammeret har i denne udførelsesform et firkantet tværsnit, men 10 tværsnittet kan også have andre former, f.eks. trekantet eller cirkulært.The liquid distributor shown in Figs. 3, consists of an elongate chamber arranged transversely over the filtration container in the vicinity of its beak wall 9. In this embodiment the chamber has a square cross-section, but the cross-section can also have other shapes, e.g. triangular or circular.

En sidedel 7 af kammeret udgør et bevægeligt låg. Sidedelen 7, som i dette tilfælde udgøres af to sideflader, er løst hængslet til resten af kammeret ved hjælp 15 af en på kammeret anbragt udragende flange, der kan gå i indgreb med en ombøjet kant i den øverste ende af lågdelen. Ved en hængsling af denne art opnår man yderligere, at det er meget nemt at skille kammeret, når det skal renses for eventuelle slamrester. I kammerets ene ende 20 er der en åbning 8, hvorigennem væsken ledes ind. Væsken vil derefter løfte lågdelen 7, hvorved der dannes en smal åbning i hele kammerets bredde, således at væsken fordeles ligeligt. Åbningen dannes i den nederste del af kammeret, således at ingen dele af kammeret ligger under 25 denne åbning. Kammeret kan yderligere drejes, således at bundfladen bliver mere skrå, alt efter hvilken viskositet væsken, der skal fordeles, har.A side portion 7 of the chamber forms a movable lid. The side part 7, which in this case consists of two side surfaces, is loosely hinged to the rest of the chamber by means of a projecting flange arranged on the chamber which can engage with a bent edge in the upper end of the lid part. With a hinge of this kind, it is further achieved that it is very easy to separate the chamber when it has to be cleaned of any sludge residues. At one end 20 of the chamber there is an opening 8 through which the liquid is led. The liquid will then lift the lid part 7, whereby a narrow opening is formed in the entire width of the chamber, so that the liquid is evenly distributed. The opening is formed in the lower part of the chamber so that no parts of the chamber lie below this opening. The chamber can be further rotated so that the bottom surface becomes more inclined, depending on the viscosity of the liquid to be distributed.

Væskefordeleren er anbragt over beholderen således, at den væske, der strømmer ud fra denne, er rettet imod 30 den skrå bund 18 med filterdug 3. Dette bevirker, at der dannes en strømning i den væske, der er i beholderen, således at væskeoverfladen strømmer hen til det øverste af den skrå overflade, hvor overfladeslammet opsamles på filterdugen. Dette er især en fordel, når der er olie-35 rester eller lignende i den væske, der skal filtreres, idet sådanne stoffer har tendens til at akkmulere iThe liquid distributor is arranged over the container so that the liquid flowing out of it is directed towards the inclined bottom 18 with filter cloth 3. This causes a flow to be formed in the liquid which is in the container, so that the liquid surface flows to the top of the inclined surface where the surface sludge is collected on the filter cloth. This is especially advantageous when there are oil residues or the like in the liquid to be filtered, as such substances tend to accumulate in

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5 · overfladen af væsken.5 · the surface of the liquid.

Under beholderen er der anbragt en opsamlingsbeholder 17, som opsamler den væske, der er filtreret. Opsamlingsbeholderen 17 er indrettet således, at man kan 5 pumpe væske fra den i takt med, at filtreringen forløber.Below the container, a collection container 17 is arranged, which collects the liquid that has been filtered. The collecting container 17 is arranged so that liquid can be pumped from it as the filtration proceeds.

Filtreringsanlægget ifølge opfindelsen kan også være indrettet således, at der kan tilsluttes vacuum under skråbunden 18. Dette har særlig betydning, hvis 10 det er meget fine partikler, der skal frafiltreres.The filtration system according to the invention can also be arranged so that a vacuum can be connected under the inclined bottom 18. This is of particular importance if it is very fine particles that are to be filtered out.

Yderligere kan filtreringsanlægget indesluttes i en lukket kasse, således at det er muligt at arbejde med væsker som f.eks. organiske opløsningsmidler, uden at der derved opstår en sundhedsskadelig risiko.In addition, the filtration system can be enclosed in a closed box, so that it is possible to work with liquids such as organic solvents without creating a health hazard.

15 Filtreringsanlægget kan laves i mange størrelser alt efter, hvad det skal bruges til. I denne forbindelse er det også fordelagtigt, hvis der er anbragt hjul under anlægget, således at det kan transporteres rundt til forskellige arbejdsstationer.15 The filtration system can be made in many sizes depending on what it is to be used for. In this connection, it is also advantageous if wheels are arranged under the plant so that it can be transported around to different workstations.

2020

Claims

A liquid filtration system for continuous filtration, comprising a container with a perforated bottom plate (18) extending obliquely upwards from a lower area at the lower edge of a rear wall (9) in the container to an upper area (2) at the front of the container, which bottom plate carries a filter cloth (3) which is successively fed in web form from an outer supply for drawing up along the bottom plate and successively delivery to a collection area (16) after passage of the upper area, characterized in that at the transition between the bottom plate (18) and the rear wall (9) is formed an insertion slot for the filter cloth (3), which gap is formed between a lower upper surface area of the bottom plate and a lip plate (6) projecting from the lower edge of the rear wall of a relatively soft material.

Plant according to claim 1, characterized in that the filter cloth is guided from a supply roll (13) around a guide roll (11), from which it extends through the insertion gap with a run substantially in the plane of the bottom plate.

Plant according to Claim 1, characterized in that the supply roll (13) is arranged on an inclined shelf so that it abuts against the outside of the rear wall of the container or another fixed surface. 25