DK169248B1 - Systems for continuous sterilization of liquids such as milk - Google Patents

Systems for continuous sterilization of liquids such as milk Download PDF

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DK169248B1
DK169248B1 DK458687A DK458687A DK169248B1 DK 169248 B1 DK169248 B1 DK 169248B1 DK 458687 A DK458687 A DK 458687A DK 458687 A DK458687 A DK 458687A DK 169248 B1 DK169248 B1 DK 169248B1
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milk
vapor
sterilization
container
steam
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DK458687A
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Danish (da)
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DK458687A (en
DK458687D0 (en
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Ole Andersen
Henrik Kjaerbye
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Apv Pasilac As
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Priority to JP63216204A priority patent/JP2637784B2/en
Priority to AU21722/88A priority patent/AU610233B2/en
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Description

i DK 169248 B1in DK 169248 B1

Opfindelsen angår et anlæg til kontinuerlig sterilisering af væsker, såsom mælk, hvor usteriliseret mælk, fortrinsvis efter forvarmning, udsprøjtes i en steriliseringsbeholder, hvortil der via dampindsprøjtningsåbninger, som er jævnt fordelt i 5 toppen af beholderen, ledes vanddamp, som sammen med mælken ledes til en holder, hvori den af vanddampen opvarmede mælk holdes i en forudbestemt tid.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a plant for the continuous sterilization of liquids such as milk, wherein unsterilized milk, preferably after preheating, is injected into a sterilization vessel to which vapor is supplied via steam injection openings evenly distributed into the top of the container. a holder in which the milk heated by the water vapor is kept for a predetermined time.

Der kendes anlæg til sterilisering af mælk. Sådanne anlæg går undertiden under betegnelsen UHT-anlæg (Ultra High Temperature 10 Plant) . I disse anlæg sprøjtes der damp ind i den til steriliseringsbeholderen tilførte mælk, således at mælken bibringes en temperatur på ca. 140-148°C, og derefter ledes mælken videre til en såkaldt holder, der er en beholder, hvori mælken opretholdes et bestemt tidsrum (ca. 2-5 sekunder) i den opvar-15 mede tilstand. Derefter ledes mælken via et overløb til et vakuumkammer, hvori det fra vanddampen hidrørende vand fjernes igen, således at mælken efter vakuumkammeret har samme tørstofindhold som før damptilførslen. Efter behandlingen i vakuumkammeret ledes mælken normalt til en homogenisator og 20 derefter til afkøling og emballering. Den herved fremstillede mælk har en holdbarhed af størrelsesordenen 2-3 måneder eller mere. Den lider imidlertid ofte af den ulempe, at den ikke har samme smagsmæssige kvaliteter som pasteuriseret mælk. Mælken har nærmest smag af at have været kogt. Dette skyldes blandt 25 andet, at mælken i steriliseringsbeholderen har tendens til at brænde sig fast på indersiden af beholderens væg og derved opholder de pågældende mælkepartikler sig for længe i steriliseringsbeholderen og derved afgives den kogte smag til den øvrige del af mælken. Ulempen med hensyn til fremkomsten af 30 mælk med en smag af at være kogt, skyldes antagelig også, at der ved steriliseringsbeholderens udløb i bunden forekommer skumdannelse i den opvarmede mælk på grund af luftarter, der er indeholdt i mælken. Herved vil mælkens opholdstid i steriliseringsbeholderen for en del af mælken blive forhalet.Milk sterilization systems are known. Such plants are sometimes referred to as Ultra High Temperature 10 Plant (UHT) plants. In these plants steam is injected into the milk supplied to the sterilization vessel so that the milk is brought to a temperature of approx. 140-148 ° C, and then the milk is passed on to a so-called container, which is a container in which the milk is maintained for a certain period (about 2-5 seconds) in the heated state. The milk is then passed through an overflow to a vacuum chamber in which the water from the steam is removed again, so that the milk after the vacuum chamber has the same dry matter content as before the steam supply. After processing in the vacuum chamber, the milk is usually passed to a homogenizer and then to cooling and packaging. The milk thus produced has a shelf life of the order of 2-3 months or more. However, it often suffers from the disadvantage that it does not have the same taste qualities as pasteurized milk. The milk has the taste of boiling. This is due, among other things, to the fact that the milk in the sterilizing container tends to burn on the inside of the container wall, and thus the milk particles in question stay in the sterilization container for too long, thereby delivering the cooked taste to the other part of the milk. The disadvantage of the appearance of 30 milk with a taste of boiling is probably also due to the fact that at the bottom of the sterilization container, foam formation in the heated milk occurs due to gases contained in the milk. This will delay the residence time of the milk in the sterilization container for part of the milk.

35 Denne ulempe er ifølge svensk fremlæggelsesskrift nr. 427005 DK 169248 B1 2 blevet forsøgt afhjulpet ved, at både en nederste del af steriliseringsbeholderens væg og i det mindste en del af holderens væg er blevet tilknyttet en kølekappe, som er indrettet til at udsætte de pågældende vægdele for en sådan temperatur, 5 at væggenes temperatur på indersiden er lidt under vandets kogepunkt ved det pågældende damptryk.35 According to Swedish disclosure no. 427005 DK 169248 B1 2, this disadvantage has been attempted to be remedied in that both a lower part of the wall of the sterilization container and at least part of the wall of the holder have been attached to a cooling jacket which is arranged to expose the persons concerned. wall parts for such a temperature that the inside temperature of the walls is slightly below the boiling point of the water at the vapor pressure in question.

Fra US-patent nr. 4.375.185 kendes et anlæg med en steriliseringsbeholder, hvori mælken bredes ud i en film via en ringformet spalte i toppen. Omkring denne spalte findes der jævnt 10 fordelte darapudstrømningsåbninger.US Patent No. 4,375,185 discloses a plant with a sterilizing container in which the milk is spread into a film via an annular slit at the top. Around this gap, there are evenly distributed 10 darapic discharge openings.

Formålet med opfindelsen er at tilvejebringe et anlæg, som er i stand til at fremstille et produkt med samme smagsmæssige kvaliteter som pasteuriseret mælk og nærmere bestemt et anlæg, som undgår, at enkelte mælkepartikler forbliver for længe i 15 steriliseringskammeret og eventuelt også i holderen.The object of the invention is to provide a plant capable of producing a product with the same taste qualities as pasteurized milk and, more specifically, a plant which prevents individual milk particles from remaining too long in the sterilization chamber and possibly also in the holder.

Dette opnås ved, at anlægget ifølge opfindelsen er ejendommeligt ved, at der foroven i steriliseringsbeholderen findes i det mindste én langs en cirkel omkring beholdermidten anbragt række af nedadrettede udstrømningsåbninger for mælken, via 20 hvilke mælken strømmer ud i beholderen i separate stråler, og dampindstrømningsåbningerne findes i en separat klokkeformet indretning, som er fastgjort indvendigt i beholderen, og som sammen med beholderen afgrænser et rundtgående dampfordelings-kammer, hvori den tilførte damp kan fordele sig før udstrøm-25 ningen igennem dampindstrømningsåbningerne.This is achieved by the fact that the plant according to the invention is characterized in that at the top of the sterilizing vessel there is at least one series of downstream discharge openings for the milk, through which the milk flows into the container in separate jets, and the vapor inflow openings exist. in a separate bell-shaped device which is fixed internally in the container and which together with the container delimits a circular vapor distribution chamber in which the supplied vapor can disperse before the flow through the vapor inflow openings.

Herved har det vist sig, at i modsætning til i de kendte anlæg, hvor mælken bredes ud i en film, som undervejs møder den tilførte vanddamp, dannes der her stråler eller tove af mælk, som går over i dråber, og som straks allerede kort efter ud-30 strømningen fra udstrømningsåbningerne møder den tilførte vanddamp og derved hurtigt bibringes den forhøjede temperatur. Herved opnås yderligere sikkerhed for, at mælkepartiklerne ikke brænder sig fast til dele af steriliseringsbeholderen, DK 169248 Bl 3 idet ingen mælkepartikler rammer imod dele af steriliseringsbeholderen, som har højere temperatur end dem selv. Den herved fremstillede mælk har vist sig at have gode smagsmæssige kvaliteter. Tilførslen af mælken til steriliseringsbeholderen i 5 form af stråler i stedet for i form af en tynd film eller tæppe medfører også, at mælken har en forholdsvis høj hastighed og derved reduceres tendensen til, at der opstår turbulens i steriliseringskammeret. Herved opnås yderligere sikkerhed for, at mælkepartiklerne ikke slynges ud imod steriliserings-10 beholderens vægge. Denne tendens modvirkes yderligere ved, at dampen ledes ind i mælken via det rundtgående fordelingskammer som sikrer, at dampen strømmer langsomt og roligt direkte ind i strålerne af mælk fra alle sider.In this way, it has been found that, unlike in the known plants, where the milk spreads in a film that meets the supplied steam vapor along the way, rays or ropes of milk, which drop into droplets, are formed and which immediately fall short. after the outflow from the outflow openings, the water vapor supplied meets the rapidly elevated temperature. This provides further assurance that the milk particles do not burn to parts of the sterilizing container, since no milk particles strike against parts of the sterilizing container which have a higher temperature than themselves. The milk thus produced has been found to have good taste qualities. The delivery of the milk to the sterilizing container in the form of rays rather than in the form of a thin film or blanket also results in the milk having a relatively high velocity and thereby reducing the tendency for turbulence to occur in the sterilization chamber. This provides further assurance that the milk particles are not thrown out against the walls of the sterilizing container. This trend is further counteracted by the steam being fed into the milk via the circumferential distribution chamber which ensures that the steam flows slowly and calmly directly into the jets of milk from all sides.

Særligt hensigtsmæssigt kan ifølge opfindelsen dampindstrøm-15 ningsåbningerne findes i en separat klokkeformet indretning, som er fastgjort indvendigt i beholderen, og som sammen med beholderen afgrænser et rundtgående dampfordelingskammer, hvori den tilførte damp kan fordele sig før udstrømningen igennem dampindstrømningsåbningerne.Particularly conveniently, according to the invention, the steam inflow openings can be found in a separate bell-shaped device which is fixed internally in the container and which together with the container delimits a circular steam distribution chamber in which the supplied steam can disperse before the flow through the steam inflow openings.

20 Ifølge opfindelsen kan dampindstrømningsåbningerne være placeret inden for et område, som har en sådan aksial udstrækning, at mælken bibringes den forhøjede steriliseringstemperatur, inden den har forladt dette områdes grænse nedadtil i steriliseringsbeholderen, hvorved opnås yderligere sikkerhed for, at 25 ingen mælkepartikler møder beholderdele, som har en højere temperatur.According to the invention, the vapor inflow openings may be located within a region of such axial extent that the milk is imparted to the elevated sterilization temperature before leaving that area downward in the sterilization vessel, thereby providing additional assurance that no milk particles will meet container portions. which has a higher temperature.

I dampfordelingskammeret kan der ifølge opfindelsen findes fordelerorganer, som er anbragt i tilknytning til et indløb for dampen og er indrettet til at dirigere dampen rundt i 30 dampfordelingskammeret, hvorved opnås yderligere sikkerhed for en jævn fordeling af dampen og en tilførsel af dampen ved en nærmest laminar og jævnt fordelt strøm.In the steam distribution chamber, according to the invention, distributor means may be provided which are adjacent to a steam inlet and arranged to direct the steam around the steam distribution chamber, thereby providing additional security for an even distribution of the steam and a supply of the steam at a near laminar. and evenly distributed power.

Opfindelsen forklares nærmere nedenfor under henvisning til DK 169248 Bl 4 tegningen, hvor fig. 1 skematisk viser en foretrukken udførelsesform for et anlæg ifølge opfindelsen, og fig. 2 et lodret snit igennem en steriliseringsbeholder i det 5 i fig. 1 viste anlæg, set i større målforhold og med dele for tydeligheds skyld ikke gennemskåret.The invention is explained in more detail below with reference to the DK 169248 B1 drawing, in which fig. 1 shows schematically a preferred embodiment of a plant according to the invention, and FIG. 2 is a vertical section through a sterilization container 5 in FIG. 1, seen in larger dimensions and with parts for clarity not cut.

Det i fig. 1 viste anlæg til sterilisering af mælk omfatter en steriliseringsbeholder 1, som via en rørledning 2 står i forbindelse med bunden af en holder 3. Op igennem bunden af hol-10 deren 3 til et vist niveau inden i holderen 3 strækker der sig et overløbsrør 4, som står i forbindelse med indløbet 5 til et vakuumkammer 6. Vakuumkammerets udløb ved bunden står via en rørledning 7 i forbindelse med en homogenisator 8, hvis udløb står i forbindelse med en varmeveksler 9 via en rørledning 10.The FIG. 1, the sterilization system of milk comprises a sterilizing container 1 which, via a pipeline 2, communicates with the bottom of a holder 3. Upwardly through the bottom of the holder 3 to a certain level within the holder 3 an overflow tube 4 extends. connected to the inlet 5 to a vacuum chamber 6. The outlet of the vacuum chamber at the bottom communicates via a conduit 7 in connection with a homogenizer 8, the outlet of which communicates with a heat exchanger 9 via a conduit 10.

15 Varmevekslerens 9 kolde side er forbundet med en rørledning 11 for tilførsel af råmælk, som efter at have passeret igennem varmeveksleren 9 strømmer videre i en rørledning 12, som er forbundet med toppen af steriliseringsbeholderen 1. I toppen af denne steriliseringsbeholder 1 findes der, som nærmere be-20 skrevet nedenfor, et udstrømningshoved 13 med rækker af udstrømningsåbninger 14 og 15 (se fig. 2), som er anbragt langs en cirkel omkring beholderens midte. Via disse udstrømnings-åbninger strømmer der i varmeveksleren 9 foropvarmet råmælk ud i steriliseringsbeholderen i tynde stråler eller tove 16 og 25 17, som efterhånden deler sig op i dråber undervejs ned til bunden af steriliseringsbeholderen 1.The cold side of the heat exchanger 9 is connected to a pipeline 11 for supplying raw milk which, after passing through the heat exchanger 9, flows further into a pipeline 12 which is connected to the top of the sterilizing container 1. At the top of this sterilizing container 1 more particularly described below, an outflow head 13 having rows of outflow openings 14 and 15 (see Fig. 2) arranged along a circle around the center of the container. Via these outflow openings, preheated raw milk in the heat exchanger 9 flows into the sterilization vessel in thin jets or ropes 16 and 25, which eventually divide into droplets on the way down to the bottom of the sterilization vessel 1.

Rundt langs indersiden af steriliseringsbeholderens 1 øvre ende findes der et dampfordelingskammer 18, der via jævnt fordelte huller står i forbindelse med steriliseringsbeholderens 30 1 indre. Dampfordelingskammeret 18 forsynes med vanddamp under tryk via en rørledning 19.Around the inside of the upper end of the sterilization vessel 1 there is a vapor distribution chamber 18 which communicates via evenly distributed holes with the interior of the sterilization vessel 30 1. The vapor distribution chamber 18 is supplied with pressurized water vapor via a pipeline 19.

DK 169248 B1 5DK 169248 B1 5

Rundt langs steriliseringsbeholderens 1 nedre ende er der anbragt en kølekappe 20 til gennemstrømning af væske ved en forhøjet temperatur på ca. 110-130°C, hvilken temperatur er afpasset efter, at de foreliggende vægtykkelser i sterilise-5 ringsbeholderen 1 er ca. 3 mm, og trykket i det indre af steriliseringsbeholderen 1 er ca. 4,0 bar abs.Around the lower end of the sterilization vessel 1 is provided a cooling jacket 20 for flow of liquid at an elevated temperature of approx. 110-130 ° C, which temperature is adjusted according to the present wall thicknesses in the sterilization vessel 1 is approx. 3 mm and the pressure inside the sterilization vessel 1 is approx. 4.0 bar abs.

Væsken tilføres kølekappen fra en varmeveksler 21 via en rørledning 22, som er tilsluttet kølekappen 20 nær dennes nedre ende. Kølekappens 20 udløb står via en rørledning 23 i forbin-10 delse med varmevekslerens 21 indløb.The liquid is supplied to the cooling jacket from a heat exchanger 21 via a conduit 22 which is connected to the cooling jacket 20 near its lower end. The outlet of the heat sink 20 is connected via a conduit 23 to the inlet of the heat exchanger 21.

Omkring holderen 3 er der ligeledes anbragt en kølekappe 24, hvis indløb er forbundet med varmevekslerens 21 udløb via en rørledning 25, og hvis udløb er forbundet med varmevekslerens 21 indløb via en rørledning 26.Around the holder 3 is also provided a cooling jacket 24, the inlet of which is connected to the outlet of the heat exchanger 21 via a pipeline 25, and the outlet of which is connected to the inlet of the heat exchanger 21 via a pipeline 26.

15 Kølekapperne 20 og 24 på henholdsvis steriliseringsbeholderen I og holderen 3 er indrettet til at bibringe de tilstødende vægdele en lavere temperatur end steriliseringstemperaturen på ca. 140-148°C og nærmere bestemt en temperatur, der er lidt under vandets kogepunkt ved det pågældende damptryk.The cooling caps 20 and 24 of the sterilizing container I and the holder 3, respectively, are arranged to impart to the adjacent wall parts a temperature lower than the sterilization temperature of approx. 140-148 ° C and more specifically a temperature slightly below the boiling point of the water at the vapor pressure in question.

20 Når anlægget er i brug, strømmer der råmælk via rørledningerne II og 12 og varmeveksleren 9 frem til steriliseringsbeholderen 1, hvori den som nævnt strømmer ud i tynde stråler 16 og 17. Umiddelbart efter udstrømningen møder disse stråler 16 og 17 af mælk en strøm af vanddamp, som tilføres via rørledningen 25 19. Vanddampen opvarmer mælken til steriliserings temperaturen, og den således opvarmede mælk strømmer via rørledningen 2 over i holderen 3, hvori mælken holdes tilbage et vist tidsrum (2-3 sekunder), indtil den via overløbsrøret 4 strømmer videre til vakuumkammeret 6, hvori der foregår en fjernelse af væske, 30 indtil tørstofindholdet i mælken er det samme som før tilførslen til steriliseringsbeholderen 1. Fra vakuumkammeret 6 ledes mælken til homogenisatoren 8 og derfra via varmeveksleren 9 til videre behandling, idet mælken i varmeveksleren 9 afgiver DK 169248 B1 6 varme til den tilførte råmælk, således at denne bibringes en for opvarmning. Den i vakuumkammeret 6 fjernede vandmængde suges ud i toppen og ledes via en rørledning 27 frem til en varmeveksler 28, i hvilken der afgives varme til kølevand, som 5 via en rørledning 29 ledes frem til varmeveksleren 21, hvori væsken til kølekapperne 20 og 24 får temperaturen sænket efter at have passeret igennem kølekapperne 20 og 24.20 When the plant is in use, raw milk flows through the pipelines II and 12 and the heat exchanger 9 to the sterilization vessel 1, in which, as mentioned, it flows into thin rays 16 and 17. Immediately after the discharge, these rays 16 and 17 of milk meet a flow of water vapor supplied via the conduit 25 19. The water vapor heats the milk to the sterilization temperature and the thus-heated milk flows through the conduit 2 into the holder 3, in which the milk is retained for a certain period (2-3 seconds) until it flows through the overflow tube 4 further to the vacuum chamber 6, in which liquid is removed, until the dry matter content of the milk is the same as before the delivery to the sterilization vessel 1. From the vacuum chamber 6 the milk is fed to the homogenizer 8 and thereafter via the heat exchanger 9 for further processing, the milk in the heat exchanger 9 supplies DK 169248 B1 6 heat to the feed milk so that it is provided for heating g. The amount of water removed in the vacuum chamber 6 is sucked out at the top and is passed via a conduit 27 to a heat exchanger 28, in which heat is supplied to cooling water, which 5 is fed via a conduit 29 to the heat exchanger 21, where the liquid for the cooling coats 20 and 24 is obtained. the temperature lowered after passing through the cooling caps 20 and 24.

I fig. 2 ses steriliseringskammeret mere detaljeret. Steriliseringskammeret har foroven mælkens udstrømningshoved 13, som 10 har i cirkler anbragte udstrømningsåbninger 14 henholdsvis 15. Mælken tilføres udstrømningshovedet 13 via et fordelerhoved 30, som indeholder to rundtgående eller ringformede kamre 31 og 32, som strækker sig koaksialt omkring steriliseringsbeholderens 1 midterakse. Det yderste ringformede kammer 31 står i 15 forbindelse med steriliseringskammerets 1 indre via kredsen af udstrømningsåbninger 14, medens det indre ringformede kammer 32 står i forbindelse med steriliseringsbeholderens 1 indre via kredsen af udstrømningsåbninger 15. De to ringf omede kamre 31 og 32 er indbyrdes adskilte og forblindet med hver sin 20 indstrømningsstuds 33 og 34, som efter ønske kan tilsluttes rørledningen 12 for tilførsel af råmælk. Hvilken tilslutningsstuds 33 eller 34, der vælges, afhænger af den kapacitet, ved hvilken anlægget ønskes at arbejde. I en foretrukken udførelsesform for opfindelsen anvendes tilslutningsstudsen 33 med 25 tilhørende udstrømningsåbninger 14, hvis gennemstrømningsmængden ønskes at være 8000 liter mælk pr. time, medens tilslutningsstudsen 34 med tilhørende udstrømningsåbninger 15 anvendes, hvis gennemstrømningsmængden ønskes at være 4000 liter mælk pr. time.In FIG. 2 the sterilization chamber is shown in more detail. The sterilization chamber has top of milk outflow head 13, which 10 has in circulation outlet openings 14 and 15 respectively. The outer annular chamber 31 communicates with the interior of the sterilization chamber 1 via the circuit of outflow openings 14, while the inner annular chamber 32 communicates with the interior of the sterilization vessel 1 through the circuit of outflow openings 15. The two annular chambers 31 and 32 are mutually spaced apart. blinded by each of the 20 inflow nozzles 33 and 34, which can be connected to the pipe 12 for supply of raw milk as desired. Which connector plug 33 or 34 is selected depends on the capacity at which the system is desired to operate. In a preferred embodiment of the invention, the connection nozzle 33 with 25 associated discharge openings 14 is used if the flow rate is desired to be 8000 liters of milk per liter. while the connection nozzle 34 with associated discharge openings 15 is used if the flow rate is desired to be 4000 liters of milk per hour. hour.

30 Centralt i udstrømningshovedet 13 er der anbragt en gennemgående åbning 35, som via et centralt kammer 36 står i forbindelse med en foroven anbragt studs 37. Ved indersiden af åbningen 35 er der fastskruet en kugleformet dyse 38, der som antydet har et antal gennemstrømningshuller, som er jævnt 35 fordelt over dysens 38 overflade. Denne dyse tjener to formål.30 A central opening 35 is provided centrally in the outflow head 13 which communicates via a central chamber 36 with an upper pin 37. At the inside of the opening 35, a spherical nozzle 38 is screwed, which, as indicated, has a number of flow holes. which is evenly distributed over the surface of the nozzle 38. This nozzle serves two purposes.

DK 169248 B1 7DK 169248 B1 7

Under brug af anlægget kan udskilte luftarter strømme via dysen 38 ud igennem studsen 37, og under rengøring af steriliseringsbeholderen kan der via dysen 38 sprøjtes rengøringsvæske ind i steriliseringsbeholderen 1.During use of the plant, separated gases can flow through the nozzle 38 out through the nozzle 37, and during cleaning of the sterilizing vessel, cleaning fluid can be injected into the sterilizing vessel 1 via the nozzle 38.

5 Udstrømningshovedet 13 er på ikke nærmere vist måde skruet fast imellem rundtgående flanger 39 og 40 på henholdsvis fordelerhovedet 30 og steriliseringsbeholderens 1 væg. På indersiden af flangen 40 på steriliseringskammerets 1 væg er der samtidigt fastskruet en klokkeformet indretning 41, som består 10 af en keglestubformet del 42 og en cylindrisk del 43, som er indbyrdes forbundet med hinanden. Den nedre ende af den cylindriske del 43 har en skråt udadragende rundtgående flange 44. Den klokkeformede indretning er, som antydet på tegningen, opdelt i tre aksialt efter hinanden placerende sektioner 45, 46 15 og 47, af hvilke de to sidstnævnte sektioner 46 og 47, som udgår omkring midten på den keglestubformede del 42 og ender ved den cylindriske dels nedre ende, som antydet er forsynet med jævnt fordelte perforeringer 60 (på tegningen er der kun vist nogle få perforeringer 60, men de findes jævnt fordelt overalt 20 på de nævnte sektioner) , som tillader gennemstrømning af vanddamp, der som nævnt ovenfor tilføres dampfordelingskammeret 18, der afgrænses imellem den klokkeformede indretning 41 og steriliseringsbeholderens 1 væg.5 The outflow head 13 is not screwed in between the flanges 39 and 40 on the distributor head 30 and the wall of the sterilization vessel 1, not shown. At the inside of the flange 40 on the wall of the sterilization chamber 1, a bell-shaped device 41 consisting of a cone stub-shaped part 42 and a cylindrical part 43 which are interconnected are screwed simultaneously. The lower end of the cylindrical portion 43 has an obliquely projecting circumferential flange 44. The bell-shaped device, as indicated in the drawing, is divided into three axially adjacent sections 45, 46 15 and 47, of which the latter two sections 46 and 47 which extends about the center of the cone-shaped portion 42 and ends at the lower end of the cylindrical portion, which is indicated to have evenly distributed perforations 60 (in the drawing, only a few perforations 60 are shown, but they are evenly distributed throughout 20 on the aforesaid). sections) which allow the flow of water vapor, as mentioned above, is supplied to the vapor distribution chamber 18 which is delimited between the bell-shaped device 41 and the wall of the sterilization vessel 1.

Vanddampen tilføres via en studs 48, inden for hvilken der i 25 væggen ind til en rundtgående kanal 49 er anbragt en gennemgående åbning 61, inden for hvilken der er placeret en plade 50, imod hvilken den tilførte vanddamp rammer. Herfra strømmer vanddampen ud til siderne rundt i den rundtgående kanal 49, som indadtil er afgrænset af den øvre sektion 45 af den klok-30 keformede indretning 41 og udadtil, dvs. på den ind til dampfordelingskammeret 18 vendende side har en væg 62 med ikke nærmere viste perforeringer, som tillader udstrømning af dampen til fordelingskammeret 18. Den rundtgående kanal 49 og de herfra udgående perforeringer til fordelingskammeret 18 sikrer 35 en jævn fordeling af vanddampen til fordelingskammeret 18 og DK 169248 B1 8 samtidigt en dæmpning af vanddampens bevægelse, således at vanddampen, når den senere strømmer ind i det indre af steriliseringsbeholderen 1 via hullerne 60 i den klokkeformede indretning 41 har en nærmest laminar strømning ved en lav hastig-5 hed.The water vapor is supplied via a plug 48, within which a through opening 61 is provided in the wall to a circumferential channel 49, within which is placed a plate 50 against which the supplied steam vapor strikes. From here, the water vapor flows out to the sides around the circumferential channel 49, which is bounded inwardly by the upper section 45 of the bell-shaped device 41 and outwardly, i.e. on the side facing into the vapor distribution chamber 18 has a wall 62 with unspecified perforations which allow the outflow of vapor to the distribution chamber 18. The circumferential channel 49 and the perforations resulting therefrom to the distribution chamber 18 ensure an even distribution of the water vapor to the distribution chamber 18 and At the same time, a damping of the movement of the water vapor, such that when it later flows into the interior of the sterilization vessel 1 via the holes 60 in the bell-shaped device 41, has a near laminar flow at a low velocity.

Forneden på steriliseringsbeholderen 1 ses kølekappen 20, hvis indre kan være forsynet med strømningshindrende organer 52, 53, 54 og 55 i form af tynde, bukkede stangstykker, som er fastgjort på en passende måde. Disse strømningshindrende orga-10 ner sikrer en udjævning af kølevæskens strømningsbane igennem kølekappen 20, således at steriliseringsbeholderens 1 væg bibringes en ensartet temperatur langs hele dens omkreds. Kølekappens 20 indløb er antydet ved henvisningstallet 56 og udløb ved henvisningstallet 57.Below the sterilization container 1 is seen the cooling jacket 20, the inside of which may be provided with flow-preventing means 52, 53, 54 and 55 in the form of thin, curved rod pieces which are appropriately attached. These flow-preventing organs ensure a smoothing of the coolant flow path through the cooling jacket 20, so that the wall of the sterilizing vessel 1 is provided a uniform temperature along its entire circumference. The inlet of the cooling jacket 20 is indicated by the reference numeral 56 and the outlet by the reference numeral 57.

15 Ved brug af dette steriliseringskammer strømmer mælken som nævnt ud af enten kredsen af åbninger 14 eller kredsen af åbninger 15, alt efter hvilken strømningsmængde, der ønskes behandlet. Mælken strømmer ud i tynde stråler eller tove og udsættes straks for dampen, der tilføres via hullerne 60 i den 20 klokkeformede indretning 41. Den aksiale udstrækning af den klokkeformede indretning 41 er valgt således, at alle mælkepartikler bibringes den ønskede steriliseringstemperatur på ca. 140-148°, inden de har passeret det nedre område af den klokkeformede indretning. Mælkepartiklerne falder i en rolig 25 strøm ned imod steriliseringskammerets bund, idet de nærmest har opsuget al den tilførte vanddamp.Using this sterilization chamber, as mentioned, the milk flows out of either the circle of openings 14 or the circle of openings 15, according to the flow rate desired to be treated. The milk flows out into thin rays or ropes and is immediately exposed to the steam supplied through the holes 60 of the 20 bell-shaped device 41. The axial extent of the bell-shaped device 41 is selected such that all milk particles are imparted to the desired sterilization temperature of about 20. 140-148 ° before passing the lower region of the bell-shaped device. The milk particles descend in a calm stream towards the bottom of the sterilization chamber, having almost absorbed all the water vapor supplied.

Under brugen af steriliseringsbeholderen 1 sker der en kondensering af vand ud for kølekappen 20, hvorved der dannes en tynd film af væske, som løber ned imod bunden af sterilise-30 ringsbeholderen 1. Herved hindres mælkepartiklerne i at brænde fast på beholdervæggen. De bobler, der dannes i mælken, som følge af opvarmningen af deri værende luftarter, viser sig hurtigt at klappe sammen på girund af deres indhold af konden-serbare stoffer, dvs. vanddamp og andre bestanddele. De ud-During the use of sterilizing vessel 1, condensation of water occurs outside the cooling jacket 20, thereby forming a thin film of liquid which runs down to the bottom of the sterilizing vessel 1. This prevents the milk particles from burning to the vessel wall. The bubbles formed in the milk as a result of the heating of the gases contained therein appear to collapse rapidly on the girund of their content of condensable substances, ie. water vapor and other constituents. They out-

Claims (3)

10 Opfindelsen er blevet beskrevet under henvisning til en fore-trukken udførelsesform. Der kan foretages mange ændringer. F.eks. kan kølekapperne 20 og 24 være opdelt i flere sektioner og fødes med væske fra hver sin varmeveksler. Dertil kommer, at opfindelsen naturligvis tilpasses til det produkt, der skal 15 behandles, idet det kan dreje sig om mange andre produkter end egentlig mælk, nemlig f.eks. sojamælk, kokosnøddemælk, stivelsesbaserede produkter og andre næringsstofholdige væsker. Patentkrav.The invention has been described with reference to a preferred embodiment. Many changes can be made. Eg. For example, the cooling caps 20 and 24 may be divided into several sections and fed with liquid from each heat exchanger. In addition, the invention is, of course, adapted to the product to be treated, since it can be related to many products other than actual milk, viz. soy milk, coconut milk, starch-based products and other nutrient-containing liquids. Claims. 1. Anlæg til kontinuerlig sterilisering af væsker, såsom mælk, hvor usteriliseret mælk fortrinsvis efter forvarmning udsprøjtes i en steriliseringsbeholder (1), hvortil der via dampindsprøjtningsåbninger (60), som er jævnt fordelt i toppen af beholderen (l) ledes vanddamp, som sammen med mælken ledes 25 til en holder (3), hvori den af vanddampen opvarmede mælk holdes i en forudbestemt tid, kendetegnet ved, at der foroven i steriliseringsbeholderen (1) findes i det mindste én langs en cirkel omkring beholdermidten anbragt række af nedadrettede udstrømningsåbninger (14, 15) for mælken, via 30 hvilke mælken strømmer ud i beholderen (l) i separate stråler (16, 17) , og at dampindstrømningsåbningerne (60) findes i en separat klokkeformet indretning (41), som er fastgjort indvendigt i beholderen, og som sammen med beholderen afgrænser et DK 169248 B1 10 rundtgående dampfordelingskammer (18), hvori den tilførte damp kan fordele sig før udstrømningen igennem dampinds trømningsåbningerne (60) .A system for continuous sterilization of liquids, such as milk, where, after preheating, unsterilized milk is preferably injected into a sterilization vessel (1), through which steam vapor (60) evenly distributed at the top of the container (1) is fed, which together with the milk, 25 is directed to a holder (3) in which the milk heated by the water vapor is kept for a predetermined time, characterized in that at least one of a series of downwardly discharged discharge openings is arranged at the top of the sterilization container (1). 14, 15) for the milk, via which the milk flows into the container (1) into separate jets (16, 17) and the vapor inflow openings (60) are provided in a separate bell-shaped device (41) which is fixed internally in the container, and which together with the container delimits a DK 169248 B1 10 vapor distribution chamber (18), in which the vapor supplied can disperse before the flow through vapor nds the bore openings (60). 2. Anlæg ifølge krav 1 eller 2, kendetegnet ved, 5 at dampindstrømningsåbningerne (60) er placeret inden for et område, som har en sådan aksial udstrækning, at mælken bibringes den forhøjede steriliseringstemperatur, inden den har forladt dette områdes grænse nedadtil i steriliseringsbeholderen (1) .Plant according to claim 1 or 2, characterized in that the vapor inflow openings (60) are located within a region of such axial extent that the milk is imparted to the elevated sterilization temperature before leaving the boundary of this area downwards in the sterilization vessel ( 1). 3. Anlæg ifølge krav 2, kendetegnet ved, at der i dampfordelingskammeret findes fordelerorganer (49, 50, 61, 62), som er anbragt i tilknytning til et indløb (48) for dampen, og er indrettet til at dirigere dampen rundt i dampfordelingskammeret (18) . 15Installation according to claim 2, characterized in that the vapor distribution chamber is provided with distributor means (49, 50, 61, 62) which are arranged adjacent to an inlet (48) for the steam, and arranged to direct the steam around the steam distribution chamber. (18). 15
DK458687A 1987-09-02 1987-09-02 Systems for continuous sterilization of liquids such as milk DK169248B1 (en)

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DK458687A DK169248B1 (en) 1987-09-02 1987-09-02 Systems for continuous sterilization of liquids such as milk
JP63216204A JP2637784B2 (en) 1987-09-02 1988-08-30 Plant for continuous sterilization of liquids
AU21722/88A AU610233B2 (en) 1987-09-02 1988-09-01 A plant for continuously sterilising liquids, such as milk

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DK458687 1987-09-02
DK458687A DK169248B1 (en) 1987-09-02 1987-09-02 Systems for continuous sterilization of liquids such as milk

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SE513414C2 (en) * 1998-02-06 2000-09-11 Tetra Laval Holdings & Finance Anode infusion request for a liquid food product
SE513413C2 (en) 1998-02-06 2000-09-11 Tetra Laval Holdings & Finance Device for an infuser for a liquid food product
JP4713654B2 (en) * 2003-07-11 2011-06-29 森永乳業株式会社 Evaluation method of pasteurized drinking milk
WO2009113845A1 (en) 2008-03-12 2009-09-17 N.V. Nutricia High protein liquid enteral nutritional composition
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US4310476A (en) * 1979-04-12 1982-01-12 Dasi Industries, Inc. Apparatus for treating fluent materials
SE427005B (en) * 1981-09-22 1983-02-28 Alfa Laval Ab PROCEDURE AND DEVICE FOR STERILIZATION OF BACTERY CONCENTRATE IN VITES

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DE102009006248A1 (en) 2009-01-27 2010-07-29 Gea Tds Gmbh Device in an infusion system for a liquid food product and method for directly heating a liquid food product in an infusion system
WO2010086082A1 (en) 2009-01-27 2010-08-05 Gea Tds Gmbh Infusion system for a liquid food product and method for directly heating a liquid food product in an infusion system
DE102009006248B4 (en) * 2009-01-27 2011-09-01 Gea Tds Gmbh Infusion system for a liquid food product and method for directly heating a liquid food product in an infusion system
DE102010008448A1 (en) 2010-02-18 2011-08-18 GEA TDS GmbH, 31157 UHT plant and process for treating heat-sensitive liquid food products
WO2011101077A1 (en) 2010-02-18 2011-08-25 Gea Tds Gmbh Method and uht installation for treating heat-sensitive liquid food products

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JPH0195725A (en) 1989-04-13
JP2637784B2 (en) 1997-08-06
AU2172288A (en) 1989-03-02
DK458687A (en) 1989-03-03
DK458687D0 (en) 1987-09-02
AU610233B2 (en) 1991-05-16

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