NO142410B - APPLIANCES FOR WASHING AND DRAINING SUSPENSIONS, EX. PULP - Google Patents

APPLIANCES FOR WASHING AND DRAINING SUSPENSIONS, EX. PULP Download PDF

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Publication number
NO142410B
NO142410B NO1878/73A NO187873A NO142410B NO 142410 B NO142410 B NO 142410B NO 1878/73 A NO1878/73 A NO 1878/73A NO 187873 A NO187873 A NO 187873A NO 142410 B NO142410 B NO 142410B
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Norway
Prior art keywords
sieve
pressure
plate
drum
drums
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NO1878/73A
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Norwegian (no)
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NO142410C (en
Inventor
Oscar Luthi
Lawrence A Carlsmith
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Improved Machinery Inc
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Publication date
Application filed by Improved Machinery Inc filed Critical Improved Machinery Inc
Publication of NO142410B publication Critical patent/NO142410B/en
Publication of NO142410C publication Critical patent/NO142410C/en

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/60—Cylinder moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/60—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for washing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/62—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying
    • B01D33/64—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by compression
    • B01D33/644—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by compression by pressure plates, membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/62—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying
    • B01D33/64—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by compression
    • B01D33/646—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying by compression by pressure rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D21C9/06—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in filters ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/28—Position of the filtering element
    • B01D2201/282—Filtering elements with a horizontal rotation or symmetry axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/34—Seals or gaskets for filtering elements

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Filtering Materials (AREA)

Description

Foreliggende oppfinnelse angår et apparat for vasking og awanning av suspensjoner, f.eks. cellulose, og apparatet er av den art som omfatter en innløpsanordning for innføring av suspensjonen under trykk til den øvre ende av en avsmalnende kanal,som forløper mellom mantelflaten på The present invention relates to an apparatus for washing and dewatering suspensions, e.g. cellulose, and the apparatus is of the kind which comprises an inlet device for introducing the suspension under pressure to the upper end of a narrowing channel, which extends between the mantle surface of

en i en trykktank roterbart lagret siltrommel og en ved sin forende,i tankveggen, svingbart lagret pressplate, som strekker seg langs utsiden av siltrommelens mantel over en vesentlig del av dennes omkrets, idet pressplaten er trykkbelastet ved hjelp av vaskevæske som fra en tilførselsan-ordning føres under trykk inn i et rom som begrenses av pressplaten og tankveggen,slik at platen holdes ettergivende presset mot det massesjikt som dannes på silmantelen og vaskevæsken ved pressplatens avløpskant får adgang til silmantelen og vasker massesjiktet på denne, idet væsken presses gjennom og inn i siltrommelen. a screen drum rotatably supported in a pressure tank and a pressure plate rotatably supported at its front end, in the tank wall, which extends along the outside of the screen drum's mantle over a significant part of its circumference, the pressure plate being pressurized by means of washing liquid from a supply device is fed under pressure into a space limited by the pressure plate and the tank wall, so that the plate is held yieldingly pressed against the mass layer that forms on the sieve mantle and the washing liquid at the discharge edge of the pressure plate gains access to the sieve mantle and washes the mass layer on it, as the liquid is pressed through and into the sieve drum .

De kjente apparater for dette formål er ikke særlig egnet til behandling av høykonsistenssuspensjoner, og foråt apparatene skal arbeide tilfredsstillende må de også arbeide med vakuum eller undertrykk, noe som kan skape problemer. The known devices for this purpose are not particularly suitable for treating high-consistency suspensions, and in order for the devices to work satisfactorily, they must also work with vacuum or negative pressure, which can cause problems.

Formålet med foreliggende oppfinnelse er å oppheve disse ulemper og å komme frem til et apparat som gir god vasking og awanning av høykonsistenssuspens joner, uten undertrykk, slik at apparatet kan være lukket for å unngå The purpose of the present invention is to eliminate these disadvantages and to arrive at an apparatus which provides good washing and dewatering of high-consistency suspensions, without negative pressure, so that the apparatus can be closed to avoid

å utsette suspensjonen for påvirkning fra luft. to expose the suspension to the influence of air.

Oppfinnelsen er kjennetegnet ved de i kravene gjengitte trekk og vil i det følgende bli forklart nærmere under hen-visning til tegningen,som viser et snitt gjennom et apparat i henhold til oppfinnelsen. The invention is characterized by the features reproduced in the claims and will be explained in more detail below with reference to the drawing, which shows a section through an apparatus according to the invention.

I den viste utførelsesform er apparatet en vaskepresse. som omfatter et par sylindriske tromler eller pressvalser 142, 144, som er lagret slik at de kan rotere om parallelle akser, og de er anbrakt inne i en trykktank 146. Tromlene 142, 144 har omløpende perforerte mantler eller filteranord-ninger 148, som mellom seg danner et nip 150, og de har de vanlige aksiale væske- eller filtratutløpskanaler som for-binder åpningene i silmantlene 148 med filtratutløpsled-ninger i den motstående ende av tromlene 142, 144. Tromlene ^L.42, 144 er forsynt med-hveast-^si-tt skraperblad 152 som fjerner presset, fast materiale fra silmantelen 148, og en utløpsledning 154 er åpen mot tanken 146 i hele dennes lengde, slik at den kan motta presset, fast materiale fra ledningen 150, idet det i denne er anbrakt en transport-skrue 156 av kjent type som roterer i pilens retning, for derved å trevle opp det faste materiale og føre dette vekk fra vaske- og avvanningsapparatet. In the embodiment shown, the device is a washing machine. which comprises a pair of cylindrical drums or press rollers 142, 144, which are stored so that they can rotate about parallel axes, and they are placed inside a pressure tank 146. The drums 142, 144 have circumferential perforated mantles or filter devices 148, which between a nip 150 is formed, and they have the usual axial liquid or filtrate outlet channels which connect the openings in the sieve jackets 148 with filtrate outlet lines at the opposite end of the drums 142, 144. The drums ^L.42, 144 are provided with -^si-tt scraper blade 152 which removes the pressed, solid material from the sieve jacket 148, and an outlet line 154 is open to the tank 146 throughout its length, so that it can receive the pressed, solid material from the line 150, as it is placed in this a transport screw 156 of a known type which rotates in the direction of the arrow, thereby loosening up the solid material and leading it away from the washing and dewatering apparatus.

Tromlene 142, 144 er forsynt med dusjer 158 for å på-føre rensevæske på silmantlene 148 etterat det faste materiale er fjernet fra mantlene av skraperbladene 152,og lek-kasje rundt endene av tromlene 142, 144 forhindres av passende tetningsanordninger av kjent type (ikke vist). Når apparatet er i drift, drives tromlene 142, 144 kontinuerlig i motsatte retninger som vist ved pilene, og oppbygningen kan være som beskrevet i U.S. patent nr. 3.730.079. En av tromlene 142, 144 tillates å bevege seg sideveis i forhold til den annen for derved å variere tverrsnittet av nipet 150, mens aksene for tromlene 142, 144 holdes parallelle. The drums 142, 144 are provided with showers 158 to apply cleaning fluid to the screen jackets 148 after the solid material has been removed from the jackets by the scraper blades 152, and leakage around the ends of the drums 142, 144 is prevented by suitable sealing devices of a known type (not shown). When the apparatus is in operation, the drums 142, 144 are continuously driven in opposite directions as shown by the arrows, and the construction may be as described in U.S. Pat. patent No. 3,730,079. One of the drums 142, 144 is allowed to move laterally in relation to the other to thereby vary the cross-section of the nip 150, while the axes of the drums 142, 144 are kept parallel.

Pressen omfatter en innløpsanordning som tilfører en fibersuspensjon under trykk til silmantlene 148 på hver av tromlene 142, 144 og i hver trommels rotasjonsretning. For hver trommel 142, 144 omfatter pressen et tilførselsrør 160 som er forbundet med en trykkilde for væskesuspensjonen, og formålet er å innføre suspensjonen i tanken 146 nær den øvre del av trommelen 142 og 144. Nær hvert tilførselsrør 160 finnes det også en elastisk tetningsstrimmel 162 som ligger an mot silmantelen 148 på den tilhørende trommel 142 eller 144 over hele trommelens lengde, slik at tetnings-strimler 162 hindrer den suspensjon som tilføres gjennom røret 160 i å strømme rundt tromlen 142 eller 144 i en retning motsatt tromlens rotasjonsretning. The press comprises an inlet device which supplies a fiber suspension under pressure to the screen jackets 148 on each of the drums 142, 144 and in the direction of rotation of each drum. For each drum 142, 144, the press comprises a supply pipe 160 which is connected to a pressure source for the liquid suspension, and the purpose is to introduce the suspension into the tank 146 near the upper part of the drum 142 and 144. Near each supply pipe 160 there is also an elastic sealing strip 162 which rests against the sieve jacket 148 on the associated drum 142 or 144 over the entire length of the drum, so that sealing strips 162 prevent the suspension supplied through the pipe 160 from flowing around the drum 142 or 144 in a direction opposite to the drum's direction of rotation.

Like etter det punkt der tilførselsrørene 160 er forbundet med tanken 14 6 er det anbrakt en tett, dobbel avbøy-ningsplate 164 som strekker seg over tankens hele lengde, og platen 164 er fast montert på tankveggen 168 i avstand fra silmantelen 148 slik at det dannes et buet kammer 166 som står i forbindelse med tilførselsrøret 160. En tett pressplate 170 som strekker seg over hele lengden av tromlens silmantel 148, går langs den ytre omkrets av mantelen 148 i direkte tilslutning til den bakre kant av avbøyningsplaten 164. Hver pressplate 170 har fortrinnsvis en bue som er mer enn 40° og mindre enn 120° av tromlens omkrets, og den totale lengde av hvert! sett plater 164, Just after the point where the supply pipes 160 are connected to the tank 146, a tight, double deflection plate 164 is placed which extends over the entire length of the tank, and the plate 164 is firmly mounted on the tank wall 168 at a distance from the strainer jacket 148 so that it forms a curved chamber 166 which is in communication with the supply pipe 160. A tight pressure plate 170 extending the entire length of the drum screen jacket 148 runs along the outer circumference of the jacket 148 in direct connection with the rear edge of the deflection plate 164. Each pressure plate 170 has preferably an arc that is more than 40° and less than 120° of the circumference of the drum, and the total length of each! set plates 164,

170 bør være større enn 80° og mindre enn 180° av trommel-omkretsen. 170 should be greater than 80° and less than 180° of the drum circumference.

Hver plate 170 er bevegelig lagret ved sin forkant Each plate 170 is movably supported at its leading edge

på en lagerblokk 172 slik at den kan svinge mot og vekk fra den tilhørende silmantel 148. Hver plate 170 deler over hele sin lengde tanken 80 i indre og ytre buede kammere, henholdsvis 174 og 176, og hvert indre kammer 174 står i åpen forbindelse med rommet 166 som befinner seg umiddel-bart foran kammeret 174, sett i rotasjonsretningen. Det er avgrenset langs sin ytre omkrets ved innerflaten av platen 170 og langs sin indre omkrets av silmantelen 148. Det ytre kammer 176 er langs sin ytre omkrets avgrenset av tankveggen 168 og langs sin indre omkrets av yttersiden av platen 170. Den ytre sideflate av hver plate 70 er forsynt med en rekke avstivende ribber 178 som strekker seg over størsteparten av den buede lengde av platen 170 og avstiver denne mot bøyning, men ribbene er avsluttet noe før den bakre kant av platen slik at det bakre parti 180 av hver plate 170 er forholdsvis bøyelig. Den indre sideflate av hver plate 170 er i det minste nær den bakre ende,forsynt med et belegg med lav friksjonskoeffisient, såsom et belegg av polytetrafluoretylen (TSE). De motstående sidekanter av platen 170 ligger i en viss avstand fra tankens endevegger, og det finnes passende ettergivende tetningsanordninger (ikke vist) mellom sidekanten og den tilstøtende endeflate av tanken, f.eks. for å hindre at suspensjonen strømmer rundt disse sidekanter på flatene 170. on a bearing block 172 so that it can swing towards and away from the associated screen jacket 148. Each plate 170 divides the tank 80 over its entire length into inner and outer curved chambers, 174 and 176 respectively, and each inner chamber 174 is in open communication with the room 166 which is located immediately in front of the chamber 174, seen in the direction of rotation. It is bounded along its outer circumference by the inner surface of the plate 170 and along its inner circumference by the sieve jacket 148. The outer chamber 176 is bounded along its outer circumference by the tank wall 168 and along its inner circumference by the outer side of the plate 170. The outer side surface of each plate 70 is provided with a series of stiffening ribs 178 which extend over most of the curved length of the plate 170 and stiffen it against bending, but the ribs are terminated slightly before the rear edge of the plate so that the rear part 180 of each plate 170 is relatively flexible. The inner side surface of each plate 170, at least near the rear end, is provided with a low coefficient of friction coating, such as a polytetrafluoroethylene (TSE) coating. The opposite side edges of the plate 170 are at a certain distance from the end walls of the tank, and there are suitable compliant sealing devices (not shown) between the side edge and the adjacent end surface of the tank, e.g. to prevent the suspension from flowing around these side edges of the surfaces 170.

En rekke trykkdrevne drivanordninger 182 er forbundet med hver plate 170 med mellomrom i platens lengderetning og nær platens bakre ende for, ved tilførsel av et trykk-medium, å presse platen 170 mot tromlen 140 og 142. Driv-anordningen 182 kunne selvfølgelig benyttes til å presse 'platene 170 med fjæring mot silmantlene 148, men de har til<* >formål å løfte platene 170 mot silmantlene 14 8. i hver opp-starting av apparatet. Når den forreste kant av hver platen 170 finnes en innløpsåpning 184 som står i forbindelse med en trykkilde, f.eks. vann under trykk, og dette kan til-føres kammeret 176 som ligger på utsiden av pressplaten 170. Trykkvæsken som tilføres gjennom rørene 184 benyttes for fjærende å presse platen 170 mot silmantlen 148 under normal drift, og bevirker at hver plate 170 gradvis nærmer seg silmantlen 148 for den tilhørende trommel 142 resp. 144 sett i tromlens rotasjonsretning. Man vil også se at de bakre endepartier av kamrene 176 er i åpen forbindelse med de partier av silmantlen 148 som befinner seg bak de bakre kanter av platene 170, slik at væsken videre tjener til å ' vaske det oppsamlede faste stoff på silmantlene 148 etterat det faste stoff har beveget seg forbi bakkanten av platen 170 . A number of pressure-driven drive devices 182 are connected to each plate 170 with spaces in the longitudinal direction of the plate and near the back end of the plate in order, by supplying a pressure medium, to press the plate 170 against the drum 140 and 142. The drive device 182 could of course be used to press the plates 170 with spring against the sieve jackets 148, but they have the purpose of lifting the plates 170 against the sieve jackets 14 8. in each start-up of the apparatus. When the front edge of each plate 170 has an inlet opening 184 which is connected to a pressure source, e.g. water under pressure, and this can be supplied to the chamber 176 which is located on the outside of the pressure plate 170. The pressure fluid which is supplied through the pipes 184 is used to springily press the plate 170 against the sieve jacket 148 during normal operation, and causes each plate 170 to gradually approach the sieve jacket 148 for the associated drum 142 or 144 seen in the direction of rotation of the drum. It will also be seen that the rear end parts of the chambers 176 are in open connection with the parts of the sieve mantle 148 which are located behind the rear edges of the plates 170, so that the liquid further serves to 'wash the collected solid matter on the sieve mantles 148 after it solid matter has moved past the rear edge of the plate 170 .

Som vist kan hver trommel 142, 144 være forsynt med en buet pressplate 186 som strekker seg over "hele lengden av tromlenes silmantler 148, og som er anbrakt mellom den bakre ende av hver plate 170 og nipet 150. Pressplatene 186 kan dessuten som vist på tegningen, være montert på en felles understøttelse 188 som spennes mot nipet 150 ved hjelp av en rekke trykkdrevne drivanordninger 190. As shown, each drum 142, 144 can be provided with a curved press plate 186 which extends over the entire length of the drums' screen jackets 148, and which is placed between the rear end of each plate 170 and the nip 150. The press plates 186 can also, as shown in drawing, be mounted on a common support 188 which is clamped against the nip 150 by means of a series of pressure-driven drive devices 190.

Når apparatet er i drift, drives tromlene 142, 144 When the apparatus is in operation, the drums 142, 144 are driven

med jevn bevegelse i motsatte rotasjonsretninger som er vist med piler, og trykkvæske tilføres gjennom rørene 184 og presser dermed platene 170 som er blitt løftet ved hjelp av drivanordningene 182, slik at platene 170 gradvis kommer nærmere inn til den tilstøtende trommel 14 2, resp. 144, sett i tromlenes rotasjonsretning. with steady movement in opposite directions of rotation which are shown with arrows, and pressure fluid is supplied through the pipes 184 and thus presses the plates 170 which have been lifted by means of the drive devices 182, so that the plates 170 gradually come closer to the adjacent drum 14 2, resp. 144, seen in the direction of rotation of the drums.

Fibersuspensjon under trykk tilføres kontinuerlig til tanken 146 gjennom ledningene 160 og strømmer gjennom kamrene 166, 174 langs hver trommel 142, 144 i trommelens dreieretning. Passasjen av denne suspensjon gjennom kamrene 166 fører til at væske strømmer inn gjennom silmantelen 148 slik at det på denne begynner å danne seg belegg av fibrøst materiale. Mens suspensjonen passerer gjennom kamrene 174, Fiber suspension under pressure is continuously supplied to the tank 146 through the lines 160 and flows through the chambers 166, 174 along each drum 142, 144 in the direction of rotation of the drum. The passage of this suspension through the chambers 166 causes liquid to flow in through the sieve mantle 148 so that a coating of fibrous material begins to form on it. As the suspension passes through the chambers 174,

. vil innerflatene av platene 170 ligge an mot det fiber- . will the inner surfaces of the plates 170 rest against the fiber

Claims (4)

materiale som er avsatt på silmantelen 148, slik at beleg-get eller matten trykkes sammen og væske presses fra denne slik at ytterligere væske vil strømme fra suspensjonen gjennom silmantelen 148.material deposited on the sieve mantle 148, so that the coating or mat is pressed together and liquid is pressed from this so that further liquid will flow from the suspension through the sieve mantle 148. Det fibrøse materiale beveges ved rotasjonen av tromlene forbi de bakre kanter av platen 170 og vaskes først av trykkvæsken som strømmer fra kamrene 176, hvor-etter materialet presses av platene 186 og deretter inn i nipet 150, der de to tromler tjener som pressvalser. Etter dette fjernes materialet fra tromlene 142, 144 ved hjelp av skraperbladene 152 og føres ut av pressen ved hjelp av skruen 156.The fibrous material is moved by the rotation of the drums past the rear edges of the plate 170 and is first washed by the pressure liquid flowing from the chambers 176, after which the material is pressed by the plates 186 and then into the nip 150, where the two drums serve as press rollers. After this, the material is removed from the drums 142, 144 by means of the scraper blades 152 and led out of the press by means of the screw 156. Den utførelsesform som her er vist og beskrevet skal bare betraktes som et eksempel på hvorledes oppfinnelsen kan bringes til utførelse, idet det godt kan tenkes andre utførelsesformer som faller innenfor rammen av oppfinnelsen. Patentkrav. 1. Apparat for vasking og awanning av suspensjoner, i f.eks. cellulose, omfattende en innløpsanordning (160) for innføring av suspensjonen under trykk til den øvre ende av en avsmalnende kanal (16 6) som forløper mellom mantelflaten (148) på en i en trykktank (146) roterbart lagret siltrommel (144) og en ved sin forende (172) i tankveggen (146) sving-i bart lagret pressplate (170) , som strekker seg langs utsiden av siltrommelens mantel (148) over en vesentlig del av dennes omkrets, idet pressplaten (170) er trykkbelastet ved hjelp av vaskevæske som fra en væsketilførselsanordning (184) føres under trykk inn i et rom (176) som begrenses av pressplaten (170) og tankveggen (146), slik at platen (170) holdes ettergivende presset mot det massesjikt som dannes på silmantelen, (148) og vaskevæsken ved pressplatens (170) avløpskant (180). får adgang til silmantelen (148) og vasker massesjiktet på denne, idet den presses gjennom og inn i siltrommelen (144),karakterisert ved at minst to siltromler (142, 144) står med parallelle akser og mantelflåtene (148) vendt mot hverandre, slik at det dannes et nyp (150) som ligger mellom avløpskantene (180) på pressplatene (170) og en utmatningsanordning (152) som er felles for begge tromler. The embodiment that is shown and described here should only be considered as an example of how the invention can be implemented, as other embodiments that fall within the scope of the invention are conceivable. Patent claims. 1. Apparatus for washing and dewatering suspensions, in e.g. cellulose, comprising an inlet device (160) for introducing the suspension under pressure to the upper end of a narrowing channel (166) which extends between the mantle surface (148) of a screen drum (144) rotatably stored in a pressure tank (146) and a its front end (172) in the tank wall (146) swing-in bare bearing pressure plate (170), which extends along the outside of the sieve drum's mantle (148) over a significant part of its circumference, the pressure plate (170) being pressurized by means of washing liquid which from a liquid supply device (184) is fed under pressure into a space (176) which is limited by the pressure plate (170) and the tank wall (146), so that the plate (170) is kept yieldingly pressed against the mass layer that is formed on the sieve jacket, (148) and the washing liquid at the drain edge (180) of the pressure plate (170). gets access to the sieve mantle (148) and washes the pulp layer on it, as it is pressed through and into the sieve drum (144), characterized in that at least two sieve drums (142, 144) stand with parallel axes and the mantle floats (148) face each other, as that a nip (150) is formed which lies between the drainage edges (180) of the pressure plates (170) and a discharge device (152) which is common to both drums. 2. Apparat som angitt i krav 1, karakterisert v e d at det mellom nypet (150) og avløpskantene (180) på hver av pressplatene (170) finnes en ytterligere pressplate (186) for hver siltromme.l. 2. Apparatus as stated in claim 1, characterized in that between the pinch (150) and the drainage edges (180) on each of the pressure plates (170) there is a further pressure plate (186) for each sieve drum.l. 3. Apparat som angitt i krav 2, karakterisert v e d at hver pressplate (170) sammen med en tilstøtende avbøyningsplate (164) strekker seg over hver sin trommel over en bue som er- større enn 80° og mindre enn 180° av trommelens omkrets. 3. Apparatus as stated in claim 2, characterized in that each pressure plate (170) together with an adjacent deflection plate (164) extends over each drum over an arc that is greater than 80° and less than 180° of the drum's circumference. 4. Apparat som angitt i krav 3, karakterisert v e d at den ytterligere pressplate (186) for hver siltrommel er bevegelig uavhengig av de øvrige pressplater (164, 170), og har midler (190) for innstilling av pressplaten (186) mot de tilstøtende tromler.4. Apparatus as specified in claim 3, characterized in that the additional pressure plate (186) for each sieve drum is movable independently of the other pressure plates (164, 170), and has means (190) for setting the pressure plate (186) against the adjacent drums.
NO1878/73A 1972-05-15 1973-05-07 APPLIANCES FOR WASHING AND DRAINING SUSPENSIONS, EX. PULP NO142410C (en)

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US25319872A 1972-05-15 1972-05-15

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NO142410C NO142410C (en) 1980-08-20

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JP (1) JPS5443602B2 (en)
AU (1) AU469448B2 (en)
BR (1) BR7303440D0 (en)
CA (1) CA1014073A (en)
DE (1) DE2322155C2 (en)
FI (1) FI57455C (en)
FR (1) FR2184877B1 (en)
GB (1) GB1388079A (en)
NO (1) NO142410C (en)
SE (2) SE410019B (en)

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Publication number Priority date Publication date Assignee Title
DE2545030C2 (en) * 1975-10-08 1983-01-13 Klöckner-Humboldt-Deutz AG, 5000 Köln Double drum filters, especially vacuum filters
JPS5527478A (en) * 1978-08-19 1980-02-27 Hitachi Kiden Kogyo Ltd Dehydrator
JPS5811760A (en) * 1981-07-16 1983-01-22 Hitachi Metals Ltd Aluminum alloy for casting
JPS5864338A (en) * 1981-10-12 1983-04-16 Mitsubishi Keikinzoku Kogyo Kk Aluminum alloy for high pressure solidification and casting
US4702845A (en) * 1986-02-06 1987-10-27 Amsted Industries Incorporated Rotary drum filter
JPH0511414Y2 (en) * 1986-04-17 1993-03-22
AT401185B (en) * 1994-10-14 1996-07-25 Andritz Patentverwaltung DEVICE FOR DRAINAGE AND OR OR WASHING SUSPENSIONS, ESPECIALLY FIBROUS SUSPENSIONS
DE19715783A1 (en) * 1997-03-06 1998-09-10 Voith Sulzer Stoffaufbereitung Fibre suspension water extraction method
SE532099C2 (en) * 2007-12-13 2009-10-20 Metso Paper Inc Apparatus for washing and dewatering pulp, systems for controlling such apparatus, and method for processing pulp in such apparatus
SE532366C2 (en) * 2008-04-23 2009-12-22 Metso Paper Inc Distribution device for dispensing cellulose pulp
SE533686C2 (en) * 2009-04-09 2010-12-07 Andritz Oy Pressure for dewatering a suspension, and ways of cleaning it
SE540916C2 (en) 2016-09-15 2018-12-18 Valmet Oy An apparatus for washing and dewatering pulp, a system for controlling such an apparatus, and a method for processing pulp in such an apparatus
KR102597565B1 (en) * 2021-05-03 2023-11-06 성균관대학교산학협력단 Pcr apparatus

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US2602549A (en) * 1945-10-02 1952-07-08 Peterson Filters & Eng Filtering apparatus
SE307508B (en) * 1963-04-03 1969-01-07 Svenska Cellulosa Ab

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FR2184877B1 (en) 1982-07-09
DE2322155A1 (en) 1974-01-17
GB1388079A (en) 1975-03-19
CA1014073A (en) 1977-07-19
AU469448B2 (en) 1976-02-12
DE2322155C2 (en) 1981-11-12
AU5442573A (en) 1974-10-17
BR7303440D0 (en) 1974-07-18
FI57455B (en) 1980-04-30
SE428707B (en) 1983-07-18
FI57455C (en) 1980-08-11
SE410019B (en) 1979-09-17
NO142410C (en) 1980-08-20
JPS5443602B2 (en) 1979-12-21
JPS4947602A (en) 1974-05-08
SE7609878L (en) 1976-09-07
FR2184877A1 (en) 1973-12-28

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