DK174812B1

DK174812B1 - Plant for decontaminating carcasses with hot water on a slaughter line

Info

Publication number: DK174812B1
Application number: DK200001671A
Authority: DK
Inventors: Torben Jensen; Jens Teilmann
Original assignee: Slagteriernes Forskningsinst
Priority date: 2000-11-10
Filing date: 2000-11-10
Publication date: 2003-12-01
Also published as: AU2001223532A1; DK200001671A; WO2002039821A1

Description

i DK 174812 B1in DK 174812 B1

Anlæg til at dekontaminere slagtchalvkroppe med varmt vand på en slagtelinieInstallations for decontaminating carcasses with hot water on a slaughter line

Den foreliggende opfindelse angår et anlæg til at dekontaminere slagtehalvkroppe med varmt vand på en slagtelinie, der fremfører parvist samhørende halvkroppe, der er 5 ophængt i hængejem, hvilket anlæg omfatter en kabine med vandstråleindretninger, hvoraf en eller flere vandstråleindretninger ved kabinens langsgående vægge tilvejebringer vandfaldsagtige vandstråler, der set ovenfra går hovedsagelig vinkelret ind mod kabinens midterplan mellem de langsgående vægge.The present invention relates to a facility for decontaminating carcasses of hot water on a slaughter line which carries paired semi-carcasses suspended in hangings, comprising a cabin with water jet devices, one or more water jet devices at the longitudinal walls of the cabin providing waterfall , viewed from above, mainly perpendicular to the center plane of the cabin between the longitudinal walls.

10 Muskler i levende, sunde dyr, såsom kreaturer og svin, er normalt sterile, men under slagteprocessen kan bakterier fra dyrenes mave-tarmsystem og hud blive overført til slagtekroppens overflade. Tilstedeværelse af patogener kan her udgøre en risiko for forbrugernes sundhed.10 Muscles in live, healthy animals, such as cattle and pigs, are usually sterile, but during the slaughter process, bacteria from the animal's gastrointestinal system and skin can be transferred to the carcass surface. Presence of pathogens here may pose a risk to consumer health.

15 Der er tidligere konstrueret udstyr til at formindske antallet af patogene bakterier på overfladen af slagtekroppe. Visse konstruktioner bruger varmt vand til at dekontaminere overfladen. Brugen af varmt vand medfører visse fordele, idet det er velegnet til at destruere bakterier og ikke selv forurener kødet. Vandet kan imidlertid påføres på forskellige måder, hvilket kan give problemer. F.eks. vil anvendelse af sprøjtedyser 20 medføre, at vandet afkøles inden det rammer kroppen. Vandet forårsager desuden dannelse af en tåge i lokalet, og anvendelse af sprøjtedyser kræver et højt pumpetryk.15 Equipment has been previously designed to reduce the number of pathogenic bacteria on the carcass surface. Certain constructions use hot water to decontaminate the surface. The use of hot water has certain advantages as it is suitable for destroying bacteria and does not itself contaminate the meat. However, the water can be applied in different ways, which can cause problems. Eg. For example, the use of spray nozzles 20 will cause the water to cool before hitting the body. The water also causes a mist to form in the room and the use of spray nozzles requires a high pump pressure.

I WO 8901738 (Commonwealt Scientific and Industrial Research Organization) er beskrevet et anlæg til dekontaminering af kreaturhalvkroppe, der fremføres enkeltvis på en 25 slagtelinie. Anlægget har langs kabinens vægge nogle ledeplader, der fordeler tilført varmt vand til en film. Filmen rettes som vandstråle mod halvkroppenes sider i forskellige niveauer. Ved anvendelse af sådanne vandstråler undgås de ovennævnte problemer ved anvendelse af sprøjtedyser.WO 8901738 (Commonwealt Scientific and Industrial Research Organization) discloses a plant for decontamination of bovine half-carcasses that is fed individually on a slaughter line. The facility has along the walls of the cabin some baffles that distribute hot water to a film. The film is directed as a jet of water to the sides of the half-body at different levels. When using such water jets, the above problems are avoided by the use of spray nozzles.

30 Et lignende system forhandles af firmaet APV under betegnelsen ’’Steer-Cleer”. Ledeplader fordeler vand med en temperatur på 80° C til film, der som bløde, vandfaldsagtige stråler rettes mod overfladen af enkeltvist fremførte kreaturhalvkroppe og dekon- 2 DK 174812 B1 taminerer disse som følge af vandets kortvarige varmepåvirkning af overfladen. Systemet er uegnet til dekontaminering af svinehalvkroppe, der fremføres parvist samhørende på hængejem med kroppenes indersider vendende mod hinanden i forholdsvis tæt afstand, idet de vandfaldsagtige stråler ikke når ind til disse overfladedele.30 A similar system is being negotiated by the company APV under the designation '' Steer-Cleer ''. Guides distribute water at a temperature of 80 ° C to films which, like soft, waterfall-like rays, are directed to the surface of individually conveyed cattle half-bodies and deconstruct them as a result of the short-term heat effect of the surface of the water. The system is unsuitable for decontamination of pig half-bodies, which are fed in pairs at a hinge with the inside of the bodies facing each other at a relatively close distance, since the waterfall-like rays do not reach these surface parts.

55

Det er formålet med opfindelsen at tilvejebringe et anlæg, der er i stand til at dekontaminere svinehalvkroppe, som fremføres parvist ophængt på hængejem. Den opnåede dekontaminering skal derved være effektiv på alle overfladedele af halvkroppene, men må ikke forårsage en overbehandling af særligt eksponerede områder med heraf 10 følgende kvalitetsforringelser, og vandet skal i vidtgående grad kunne påføres uden anvendelse af sprøjtedyser, så de dermed forbundne ulemper undgås.SUMMARY OF THE INVENTION It is an object of the invention to provide a system capable of decontaminating pig half-bodies which are fed in pairs suspended in a hammock. The resulting decontamination must thereby be effective on all surface parts of the half-bodies, but must not cause over-treatment of particularly exposed areas, with the following 10 deteriorations in quality, and the water must be able to be applied extensively without the use of spray nozzles to avoid the associated disadvantages.

Dette opnås i et anlæg ifølge opfindelsen, hvilket anlæg er kendetegnet ved, at en eller flere andre vandstråleindretninger ved kabinens langsgående vægge tilvejebringer 15 vandfaldsagtige vandstråler, der set ovenfra går skråt ind mod midterplanet, og at der findes midler til at holde halvkroppene orienteret med deres flækkeplan hovedsagelig parallelt med kabinens midterplan.This is achieved in a system according to the invention, characterized in that one or more other water jet devices at the longitudinal walls of the cabin provide 15 waterfall-like water jets which are inclined from above from the middle plane and that means are provided for keeping the half-bodies oriented with their splitting plane mainly parallel to the center plane of the cabin.

En eller flere vandstråleindretninger, der tilvejebringer vandstråler, der går skråt ind mod 20 midterplanet, producerer fortrinsvis stråler, som set ovenfra danner en vinkel på mellem 45 og 75° med midterplanet.Preferably, one or more water jet devices which provide water jets inclined toward the center plane produce beams which, from above, form an angle of between 45 and 75 ° with the center plane.

En eller flere vandstråleindretninger omfatter fortrinsvis et strålerør, der er rettet skråt ind mod en ledeplade, der er bestemt til at udbrede vandstrålen fra strålerøret til en vandfilm, 25 som forlader indretningen som en vandfaldsagtig vandstråle.Preferably, one or more water jet devices comprise a jet pipe directed obliquely to a guide plate intended to propagate the water jet from the jet pipe to a water film leaving the device as a waterfall-like water jet.

Ved denne udførelsesform kan strålerøret være rettet nedad og ledepladen være hovedsagelig lodret og for neden være bøjet i buet facon bort fra kabinens væg, så vandfilmen forlader pladen som en vandfaldsagtig vandstråle med retning ind mod 30 kabinens midterplan. Anlægget kan herved omfatte vandstråleindretninger, hvor det ikke buede stykke af ledepladen er monteret på væggen eller parallelt hermed, og andre DK 174812 B1 3 vandstråleindretninger, hvor det ikke buede stykke af ledepladen set ovenfra er monteret i en vinkel i forhold til væggen.In this embodiment, the jet tube may be directed downwards and the baffle plate is substantially vertical and below it may be bent in a curved shape away from the cabin wall, leaving the water film as a waterfall-like jet of water facing towards the center plane of the cabin. The system may hereby comprise water jet devices where the non-curved piece of the baffle is mounted on the wall or parallel thereto, and other water jet devices where the non-curved portion of the baffle is viewed from above at an angle to the wall.

Ifølge en anden udførelsesform af vandstråleindretninger med strålerør kan strålerøret i 5 mundingen være forsnævre! til en slidsagtig åbning, der forløber hovedsagelig parallelt med ledepladen, og ledepladen være hovedsagelig plan og orienteret, så vandfilmen forlader pladen som en vandfaldsagtig stråle, der set ovenfra går skråt ind mod kabines midterplan.According to another embodiment of water jet devices with jet pipes, the jet pipe in the mouth 5 can be narrowed! to a slit-like opening extending substantially parallel to the baffle, and the baffle being substantially planar and oriented so that the water film leaves the baffle as a waterfall-like beam, which is viewed from above from the cabin plane mid-plane.

10 En eller flere vandstråleindretninger kan langs ledepladens kanter, som forløber i strålens retning, have sidestykker, der begrænser filmens sideudbredelse.One or more water jet devices may have along side edges of the guide plate which extend in the direction of the jet, which limit the side spread of the film.

Anlægget har fortrinsvis opsamlingsanordninger i kabinens nedre del til at modtage vand efter at det har forladt vandstråleindretningeme, hvoraf en første opsamlingsanordning 15 udgøres af kabinens bund og har et dræn til en recirkulationsbeholder, og en anden opsamlingsanordning består af en over kabinens bund hævet, langsgående rende og har et eget dræn, der hovedsagelig er forbundet til kloak. I et sådant anlæg forurenes genbrugsvandet mindre, så f.eks. tilsætningen af frisk vand kan reduceres.The system preferably has collecting devices in the lower part of the cabin to receive water after leaving the water jet devices, a first collecting device 15 being the bottom of the cabin and having a recirculation tank drain, and a second collecting device consisting of a longitudinal longitudinal channel raised above the cabin bottom. and has its own drainage, which is mainly connected to sewers. In such a plant, the recycled water is less polluted, so e.g. the addition of fresh water can be reduced.

20 Opfindelsen forklares nærmere i det følgende under henvisning til tegningen, hvori - fig. 1 viser et længdesnit gennem et anlæg ifølge opfindelsen til at behandle slagtehalvkroppe med varmt vand på en slagtelinie, der fremfører parvist samhørende halvkroppene, 25 - fig. 2 viser et tværsnit gennem samme anlæg efter linien A-A i fig. 1, og - fig. 3 viser detaljer ved to vandstråleindretninger i anlægget.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a plant according to the invention for treating carcasses with hot water on a slaughter line feeding in pairs of semi-carcasses; FIG. 2 shows a cross section through the same plant along line A-A in FIG. 1, and - FIG. 3 shows details of two water jet devices in the plant.

Anlægget i fig. 1 og 2 omfatter en kabine med to langsgående vægge 1. Giidestangen 2 i en slagtelinie strækker sig gennem kabinen i midterplanet m mellem de to vægge 1. På 30 væggene er monteret vandstråleindretninger 10, 11, 12, der tilvejebringer vandfaldslignende vandstråler 13 (fig. 2), som rammer overfladen af partvist samhørende halvkroppe 3. Halvkroppene er ophængt i et hængejem 4 og føres gennem kabinen ved hjælp af en transportør, der påvirker hængejemets overkrog på giidestangen 2. Vandstråle- 4 DK 174812 B1 indretningerne er anbragt i forskellige højder, så vandstråleme rammer forskellige dele af kroppenes overflade. Indretningerne er placeret på samme måde på de to vægge I og findes i tre forskellige konstruktioner.The system of FIG. 1 and 2 comprise a cabin with two longitudinal walls 1. The guide rod 2 in a stroke line extends through the cabin in the median plane m between the two walls 1. On the 30 walls are water jet devices 10, 11, 12 which provide waterfall-like water jets 13 (fig. 2) affecting the surface of partially related half-bodies 3. The half-bodies are suspended in a hinge 4 and passed through the cabin by means of a conveyor which affects the hinge of the hinge on the guide rod 2. The water jet devices are arranged at different heights, so the water jets hit different parts of the body's surface. The devices are located in the same way on the two walls I and are available in three different constructions.

5 Indretningerne 10 er af den art, som foroven består af en plan plade, der er monteret i direkte kontakt med væggen 1, og hvor pladen forneden er bøjet i en omtrentlig kvartcirkelformet bue bort fra væggen 1. Over hver plade findes et strålerør 10a for varmt vand. Rørets ende er bøjet ind mod den øvre del af pladen, så vandstrålen rammer pladen på den øverste del og udbredes til en nedadløbende vandfilm på pladen. Filmen afbøjes af 10 pladens nedre, buede del, så den forlader pladen som en bred vandfaldsagtig stråle, der har tilstrækkelig fart til, at den rammer slagtekroppens overflade i en vinkel, der typisk er mellem 30 og 60°. Indretningerne 10 er indstillet til at ramme den nærmest liggende halvkrop direkte på ydersiden.The devices 10 are of the type above which consist of a flat plate mounted in direct contact with the wall 1, and the plate below is bent in an approximate quarter circular arc away from the wall 1. Above each plate there is a jet tube 10a for hot water. The end of the tube is bent toward the upper portion of the plate so that the jet of water hits the plate on the upper portion and propagates into a downward flowing film of water on the plate. The film is deflected by the lower, curved portion of the plate to leave the plate as a wide waterfall-like beam that has sufficient velocity to hit the surface of the carcass at an angle typically between 30 and 60 °. The devices 10 are set to hit the nearest half-body directly on the outside.

15 Indretningerne 11 er konstrueret på lignende måde som indretningerne 10 og består således foroven af en plan plade 14 (fig. 3), og forneden af en fortsættelse af pladen, der er bøjet i en omtrentlig kvartcirkelformet bue bort fra væggen 1. Over hver plade findes et strålerør 11a for varmt vand. Rørenden er bøjet ind mod den øvre del af pladen, så vandstrålen rammer pladen på den øverste del og udbredes til en nedadløbende vandfilm, 20 som på tilsvarende måde som i indretningerne 10 afbøjes af den nedre, buede del og forlader pladen som en vandfaldsagtig vandstråle. Den plane plade og den tilhørende nedre buede del er ved hjælp af beslag 15 monteret på væggen 1 i en vinkel på ca. 25° set ovenfra og er indstillet, så vandstrålen fra den nedre, buede de! rammer den fjerntliggende halvkrop på indersiden. I modsætning til indretningerne 10 har indretningerne 11 på den 25 plane plade og den nedre, buede del nogle sidestykker 16, der begrænser vandfilmens sideudbredelse.The devices 11 are constructed in a similar manner to the devices 10 and thus consist at the top of a flat plate 14 (Fig. 3) and below a continuation of the plate which is bent in an approximate quarter circular arc away from the wall 1. Above each plate there is a radiant tube 11a for hot water. The pipe end is bent toward the upper portion of the plate so that the jet of water hits the plate on the upper portion and propagates into a downward flowing film 20, which is deflected by the lower, curved portion, in the same manner as in the devices 10, leaving the plate as a waterfall-like water jet. The flat plate and the associated lower curved part are mounted on the wall 1 at an angle of approx. 25 ° viewed from above and set so that the jet of water from the lower, they curved! striking the distant half-body on the inside. Unlike the devices 10, the devices 11 on the 25 flat plate and the lower, curved portion have some side pieces 16 which limit the lateral distribution of the water film.

Indretningerne 12 er konstrueret ved, at mundingen på et strålerør 12a er klemt sammen til en art spalte, så strålen fårstørre udgangshastighed. En vifteformet ledeplade 17 er svejset 30 på røret ved mundingen og er placeret skråt i strålens bane, så strålen udbredes til en bredere, vandfaldslignende stråle, som er rettet opad mod slagtekroppens haleparti i en DK 174812 B1 5 skrå vinkel set ovenfra og rammer kroppen fra rygsiden. Sidestykker 18 begrænser vandstrålens sideudbredelse.The devices 12 are constructed in that the orifice of a jet pipe 12a is clamped together to form a slit so that the jet gets a greater exit velocity. A fan-shaped baffle 17 is welded 30 to the pipe at the mouth and is positioned obliquely in the orbit of the beam, so that the beam is propagated to a wider, waterfall-like beam, which is directed upwardly toward the tail portion of the carcass at an inclined angle from above and strikes the body from above. dorsal side. Side pieces 18 restrict the lateral distribution of the water jet.

For neden i kabinen findes en rende 5 (fig. 1 og 2), som opsamler forbrugt vand, der løber 5 af forneden på slagtehalvkroppene. Dette vand har et forholdsvis højt forureningsindhold (kødsmuld fra midtflækningen og andet løst eller vandopløseligt materiale) og ledes direkte i kloak. Kabinens bund 6 opsamler forbrugt eller uudnyttet vand, som ikke opfanges af renden 5, og leder det til et rensningsudstyr, som grovfiltrerer returvandet og afskummer overfladen. Efter rensning føres vandet gennem en varmeveksler, der 10 genopvarmer vandet til 80° C, og derefter føres det igen til vandstråleiudretningerne (10, 11, 12) for fornyet brug. Et overvågningssystem, der måler det recirkulerede vands uklarhed, sikrer at vandet har den fornødne kvalitet. Anvendelsen af renden 5 betyder, at vandet forurenes mindre, således at anlægget kan køre en hel dag med mindre supplement af frisk vand (ledningsvand). Forholdet mellem recirkuleret vand og vand udledt til kloak 15 er ca. 4:1.At the bottom of the cabin is a gutter 5 (Figs. 1 and 2) which collects spent water that runs 5 from the bottom of the carcasses. This water has a relatively high contaminant content (mid-speckled meat debris and other dissolved or water-soluble material) and is conducted directly into sewers. The bottom of the cabin 6 collects consumed or unused water, which is not captured by the gutter 5, and directs it to a purification equipment which roughly filters the return water and foams the surface. After purification, the water is passed through a heat exchanger which reheats the water to 80 ° C and then it is fed again to the water jet devices (10, 11, 12) for reuse. A monitoring system that measures the turbidity of the recycled water ensures that the water has the necessary quality. The use of the gutter 5 means that the water is less polluted, so that the system can run an entire day with less fresh water (tap water). The ratio of recycled water to water discharged to sewer 15 is approx. 4: 1.

Slagtekroppene 3 føres ind i og gennem kabinen med ryggen forrest i transportretningen, som er angivet med pilen P. For at bibeholde orienteringen og holde halvkroppene adskilt fra hinanden på hængejemet 4 er der lidt over hængejemets niveau anbragt to parallelt 20 løbende stænger 7, der hindrer drejning af halvkroppene, mens de er i kabinen.The carcasses 3 are inserted into and through the cabin with the back at the front in the direction of transport indicated by the arrow P. In order to maintain orientation and keep the half-bodies apart from one another on the hinge 4, two parallel rods 7 are arranged slightly above the hinge level, preventing turning the half-bodies while in the cabin.

Anlægget kan behandle 400 kroppe i timen, hvilket svarer til den normale kapacitet på slagtelinier i Danmark. Efter dekontaminering føres kroppene til tunnelkøling og temperaturudligning. Ved hjælp af svaberprøver er det undersøgt, om dekontamineringen 25 er effektiv med hensyn til ensartethed og nedsættelse af det totale bakterietal. Dette er tilfældet i overraskende grad. Efter tunnelkøling blev konstateret en reduktion af antallet af E. coli-bakterier på 2,7 log-enheder, hvilket er fuldt tilfredsstillende. Desuden udviste ingen af kødoverflademe en varig nedsættelse af kvalitetsegenskaber. Kødet blev lettere gråtonet umiddelbart efter dekontamineringen, men genvandt farven i løbet af et døgn.The plant can process 400 bodies per hour, which corresponds to the normal capacity on slaughter lines in Denmark. After decontamination, the bodies are brought to tunnel cooling and temperature equalization. By means of swab tests, it has been investigated whether decontamination 25 is effective in uniformity and reduction of the total bacterial count. This is surprisingly the case. After tunnel cooling, a reduction in the number of E. coli bacteria of 2.7 log units was found, which is fully satisfactory. Moreover, none of the meat surfaces exhibited a lasting reduction in quality properties. The meat was slightly greyed out immediately after decontamination, but regained its color within a day.

30 Anlægget har derfor vist sig særdeles værdifuldt til dekontaminering af parvist fremførte svinehalvkroppe på en slagtelinie.30 The plant has therefore proved extremely valuable for decontamination of paired pig half-carcasses on a slaughter line.

Claims

An installation for decontaminating carcasses (3) with hot water on a slaughter line feeding paired semi-carcasses suspended in a hanging house, system 5 comprising a booth with water jet devices (10, 11, 12), one or more water jet devices (10) at the longitudinal walls (1) of the cabin provide waterfall-like water jets (13), viewed from above, substantially perpendicular to the median plane (m) of the cabin between the longitudinal walls (1), characterized in that one or more other water jet devices (11, 12) at the longitudinal walls (I) of the cabin 10 provide waterfall-like water jets (13), viewed from above, obliquely towards the center plane (m) and means (7) for keeping the half-bodies (3) oriented with their splitting plane substantially parallel with the center plane of the cabin (m).

Installation according to claim 1, characterized in that one or more water-jet devices (11), which provide water jets (13) which incline inclined towards the middle plane (m), produce rays which, as seen from above, form an angle of between 45 and 75 ° with the median plane.

Installation according to claim 1, characterized in that one or more water jet devices (10, 11, 12.) comprise a jet pipe (10a, 1a, 12a), which is directed obliquely to a guide plate (14, 17), 20 which is intended to propagate the water jet from the jet to a water film leaving the device as a waterfall-like water jet (13).

Installation according to claim 3, characterized in that the jet pipe (10a, 11a) is directed downwards and that the baffle (14) is substantially vertical and below is bent in curved form away from the wall (1) of the cabin 25, leaving the water film the plate as a waterfall-like water jet (13) with a direction towards the center plane (m) of the cabin.

Installation according to claim 4, characterized in that it comprises water jet devices (10), wherein the non-curved piece of the drain plate (14) is mounted on the wall (1) or parallel thereto, 30 and other water jet devices (11) where it does not curved. a top view of the guide plate (14) is mounted at an angle to the wall (1). DK 174812 B1 7

Installation according to claim 3, characterized in that it comprises water jet devices (12), wherein the jet pipe (12a) in the mouth is narrowed to a slit-like opening extending substantially parallel to the guide plate (17) and that the guide plate (17) is mainly plane and is oriented so that the water film (13) leaves the plate as a waterfall-like beam seen from above from the angle to the center plane (m) of the cabin.

6 DK 174812 B1

Installation according to claim 3, characterized in that it comprises one or more water jet devices (11, 12) having along the edges of the guide plate (14, 17) which extend in the direction of the beam, side pieces (16, 8) which limit the film's page spread.