Uppfinnare: H W Thylefors Vid separering av t. ex. vattenextrakt av kaffe eller citronsaft, som utgora slamhaltiga blandningar av i varandra icke losliga vatskor, dvs. vattentosning och olja, liar man vid hogre krav pa slamfrihet hos de utgaende vatskorna hittills forfarit sa, att slammet skilts frail vatskan i en harfor lampad centrifug av s. k. klarifikatortyp. Darefter har vatskan i en annan centrifug av s. k. purifikatoreller koncentratortyp befriats fran sift innehall av olja. Detta fOrfarande liar salunda kravt anvandningen av tva olika centrifuger. Den centrifug, som i det enskilda fallet har den lagre avverkningsformagan, har darvid dessutom begransat hela anlaggningens maximala avverkningsformaga.
Inventor: H W Thylefors When separating e.g. aqueous extracts of coffee or lemon juice, which form sludge-containing mixtures of mutually insoluble water-shoes, ie. water defrosting and oil, if higher requirements for sludge freedom in the outgoing water tanks have so far been carried out in such a way that the sludge is separated from the water in a hair-lit centrifuge of the so-called clarifier type. Thereafter, the liquid in another centrifuge of the so-called purifier or concentrator type has been freed from the sieve containing oil. This procedure thus requires the use of two different centrifuges. The centrifuge, which in the individual case has the lower felling capacity, has thereby also limited the entire felling capacity of the entire plant.
F5religgande uppfinning har till andamal att i en och samma centrifug utfora dessa hada olika separeringsoperationer. Deana effekt kan uppnas ddrigenom, att man for andamblet anvander en i sig sjalv kand centrifug, som Or forsedd med i separeringsrummet anordnad insats av platar, av vilka en stracker sig, radiellt raknat, utanfor de 5vriga piatarna och delar upp dessa i tvh olika platsatspartier, av vilka det i genomstromningsriktningen raknat senare platsatspartiet har ett Iran platarnas innerkanter utgaende avlopp for utseparerad latt vatska och ett avlopp for utseparerad tung vatska, varjamte en passage for vatska finnes mellan platsatspartierna, och centrifugen enligt uppfinningen är Winnetecknad darav, att passagen ligger pa storre radier an platarnas innerkanter men pa vasentligt mindre radier an vhtskeblandningens inlopp i den del av separeringsrummet, som innehaller det i genomstromningsriktaingen raknat forsta platsatspartiet. I en pa sh sat utbildad centrifug later man det i stromningsriktningen raknat forsta platsatspartiet arbeta sasom klarifikator och det andra partiet sasom koncentrator eller purifikator. For att viitska skall kunna stromma fran det ena Dupl. kl. 82 13.: 6/10; 82 b: platsatspartiet till det andra genom den angivna passagen, bora avloppen for tung och Hilt vatska vara sh anordnade, att gransnivan mellan tung och latt vatska blir forlagd, radiellt sett, innanfor passagens ytterkanter. Gransnivans lage kan avea regleras genom t. ex. variation av mottrycket i avloppet for den tunga vatskan medelst en i detta avlopp insatt strypventil. Passagen kan erhallas darigenom, att innerkanten av den plasatspartierna atskiljande platen dr belagen radiellt tang-re ut On de Ovriga platarnas innerkanter eller att platen Or fOrsedd med ph lamplig radie belagna genomledningshal. Det är lampligt, att Oven samtliga ovriga platar hava dylika genornledningshal. For att trygga att den tunga vatskan i sin helhet tvingas att str8mma igenom passagen, b5r den platsatspartierna atskiljande platen stracka sig ut till de, yttersta delarna av separeringsrummets insida. The present invention has for its object to carry out in one and the same centrifuge these had different separation operations. This effect can be achieved by using a centrifuge known per se, which is provided with an insert of plates arranged in the separation space, one of which extends, radially shaved, outside the other plates and divides these into two different seat portions. , of which the later portion portion is shaved in the direction of flow, has an inner outlet of the plates of Iran for separated light liquid and a drain for separated heavy liquid, and a passage for liquid is present between the portion portions, and the centrifuge according to the invention is Winnet drawn. radii on the inner edges of the plates but on substantially smaller radii on the inlet of the liquid mixture in the part of the separation space which contains the first place portion portion shaved in the direction of flow. In a centrifugally trained centrifuge, the first batch portion is acted as a clarifier and the second portion as a concentrator or purifier in the direction of flow. In order for Viitska to be able to stream from one Dupl. at 82 13 .: 6/10; 82 b: the seat portion to the other through the specified passage, drill the drains for heavy and Hilt liquid be arranged so that the spruce level between heavy and light liquid is located, radially speaking, within the outer edges of the passage. The spruce level layer can avea be regulated by e.g. variation of the back pressure in the drain for the heavy liquid by means of a throttle valve inserted in this drain. The passage can be obtained in that the inner edge of the plate separating the plate portions is coated radially outwards on the inner edges of the other plates or that the plate is provided with a suitable radius for the passage. It is fitting that Oven all other plates have such a gene conduction hall. In order to ensure that the heavy liquid as a whole is forced to flow through the passage, the plate separating the seat portions should extend to the outermost parts of the inside of the separation space.
Uppfinningen Or nd.rmare beskriven i det foljande under hanvisning till bifogade ritning, som sthematiskt visar ett utforande av foreliggande centrifug, Ritningsfiguren visar den. vanstra halvan av en vertikalsektion genom en sjalvtOmmande centrifug, ehuru uppfinningen Oven kan tillampas vid en munstyckscentrifug eller slamackumulerande centrifug. The invention is further described in the following with reference to the accompanying drawing, which schematically shows an embodiment of the present centrifuge. The drawing figure shows it. left half of a vertical section through a self-emptying centrifuge, although the invention can also be applied to a nozzle centrifuge or sludge accumulating centrifuge.
PS. ritningen betecknar 1 rotorkroppen, 2 dennas lock och. 3 en lasring for fasthallande av locket vid kroppen 1. I den senares vagg finnas slamutmatningsbppningar 4, som Oppnas och stangas av en axiellt rorlig ventiltallrik 5. Vatska, som skall separeras, tillfores genom en kanal 6 i centrifugspindeln 7 och kommer geriom fordelaren 8 in i separeringsrummet 9. I detta finnas tva. platsatspartier 10 och 11, som atskiljas ay en plat 12 med st5rre diameter On i5vriga plhtar. Platen 12 har liksom de andra platarna uppledningshal 13. Utseparerad latt vatska samlas fran de bagge platsatspartierna 10 och 11 i ett centralt 2— — rum 14 och avgar fran detta genom ett avlopp 15. Utseparerad tung vatska avgar genom en kanal 16 och ett avlopp 17. I det senare är insatt en icke visad strypventil, medelst vilken gransnivan mellan tung och latt vatska kan bringas att ligga nagonsta.des innanfor ytterkanterna av halen 13. De bagge avloppen, som pa. ritningen aro visade sasom hermetiskt anslutna till centrifugtoppen, Aro -Made mot denna medelst packningar 18 och 19. Ventiltallriken 5 halles stangande, dvs. tryckt mot locket 2 medelst manovervatska (normalt vatten), som genom en stillastiende kanal 20 tillfores ett ringformigt rum 21 i rotorbottnen och fran detta genom en kanal 22 strommar in i ett koniskt rum 23 mellan ventiltallrikens undersida och rotorkroppens insida. Manovervatskan tillfores i sadan mangd, att den trots utstromning genom ett litet draneringshal 24 fyller rummet 23 till en niva, som bestammes av ett braddavlopp 25. Overskott av manovervatska avgar genom detta. Nar centrifugens separeringsrum skall tommas, avbrytes saval tillforseln av den vatska, som skall separeras, som tillforseln av manovervalska, utan att eentrifugen stannas. Vatskan i rummet 23 tommes da genom halet 24 och ventiltallriken 5 tryckes neat air rotorinnehallet, som darvid avg'a'r genom oppningarna 4. Ventiltallriken stanger sedan genom fiimyad tillforsel air manovervatska, innan separeringen aterupptages. PS. the drawing denotes 1 the rotor body, 2 its lid and. 3 a laser ring for holding the lid to the body 1. In the latter cradle there are sludge discharge openings 4, which are opened and closed by an axially movable valve plate 5. Liquid to be separated is supplied through a channel 6 in the centrifuge spindle 7 and enters the distributor 8 in the separation room 9. In this are two. seat portions 10 and 11, which are separated by a plate 12 of larger diameter on other plates. The plate 12, like the other plates, has a lead hall 13. Separated light liquid collects from the ram seat portions 10 and 11 in a central 2- room 14 and exits from this through a drain 15. Separated heavy liquid emits through a channel 16 and a drain 17. In the latter a throttle valve (not shown) is inserted, by means of which the spruce level between heavy and light liquid can be brought to lie somewhere inside the outer edges of the tail 13. The ram drains, which pa. the drawing aro showed as hermetically connected to the centrifuge top, Aro -Made against it by means of gaskets 18 and 19. The valve plate 5 is kept closed, i.e. pressed against the lid 2 by means of operating water (normal water), which is fed through a stationary channel 20 to an annular space 21 in the rotor bottom and from there through a channel 22 flows into a conical space 23 between the underside of the valve plate and the inside of the rotor body. The maneuvering liquid is supplied in such an amount that, despite outflow through a small drainage hall 24, it fills the room 23 to a level which is determined by a brad drain 25. Excess maneuvering liquid emits through it. When the centrifuge separation chamber is to be emptied, the supply of the liquid to be separated is interrupted, as the supply of control valves, without the centrifuge being stopped. The liquid in the space 23 is then emptied through the tail 24 and the valve plate 5 is pressed neatly into the rotor contents, which thereby exits through the openings 4. The valve plate then closes by means of a supply of air control fluid, before the separation is resumed.
Separeringen sker pa foljande satt. Den i separeringsrummet 9 inkommande vatskan befrias i utrymmet under platen 12 fran huvudmangden av slammet, som bildar en kudde 26 vid rummets 9 periferi. I detta utrymme avskild latt vatska avgar vid platarnas 10 innerkanter till rummet 14. Den tunga vatskan hindras genom sliming att ga runt ytterkanten av platen 12 utan tvin.gas att tillsammans med ej utseparerad latt vatska passera upp i utrymmet ovanfor platen 12 genom halen 13 I denna. I det ovre platsatspartiet utsepareras resten av latt vatska, som aven uppsanalas rummet 14, medan eventuella mindre mangder slam gâ till separeringsrummets periferi. Renseparerad tung vatska avgar darefter genom kanalen 16. The separation takes place in the following way. The liquid entering the separation space 9 is released in the space under the plate 12 from the main amount of sludge, which forms a cushion 26 at the periphery of the space 9. In this space separated small liquid exits at the inner edges of the plates 10 to the space 14. The heavy liquid is prevented by slimming to pass around the outer edge of the plate 12 without forcing gas to pass up into the space above the plate 12 through the tail 13 this. In the upper seat portion, the rest is separated from light liquid, which is also channeled up to the room 14, while any smaller amounts of sludge go to the periphery of the separation room. Purified separated heavy liquid then exits through the channel 16.
Allt efter behov kan man placera platen 12 langre ned eller langre upp i platsatsen och darigenom fa den for det enskilda fallet mest lampade proportionen mellan centrifugens klarifikatordel och purifikator- eller koncentratordel, sâ att centrifugen i sin helhet far storsta avverkningsformaga. Beteckningarna 12a och 12b angiva olika tankbara lagen av platen 12. Depending on the need, the plate 12 can be placed further down or further up in the seat set and thereby get the most lighted proportion for the individual case between the centrifuge part's clarifier part and the purifier or concentrator part, so that the centrifuge as a whole has the largest felling capacity. The designations 12a and 12b indicate different conceivable layers of the plate 12.