NL2020880B1 - Method and machine for cleaning metal mesh type protective clothing - Google Patents

Method and machine for cleaning metal mesh type protective clothing Download PDF

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Publication number
NL2020880B1
NL2020880B1 NL2020880A NL2020880A NL2020880B1 NL 2020880 B1 NL2020880 B1 NL 2020880B1 NL 2020880 A NL2020880 A NL 2020880A NL 2020880 A NL2020880 A NL 2020880A NL 2020880 B1 NL2020880 B1 NL 2020880B1
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NL
Netherlands
Prior art keywords
drum
washing
protective clothing
metal mesh
washing liquid
Prior art date
Application number
NL2020880A
Other languages
Dutch (nl)
Inventor
Frans Neels Willem
Jan Van Den Brink Marinus
Original Assignee
Unikon B V
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unikon B V filed Critical Unikon B V
Priority to NL2020880A priority Critical patent/NL2020880B1/en
Priority to PCT/NL2019/050251 priority patent/WO2019212339A1/en
Application granted granted Critical
Publication of NL2020880B1 publication Critical patent/NL2020880B1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/06—Cleaning involving contact with liquid using perforated drums in which the article or material is placed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/041—Cleaning travelling work
    • B08B3/042—Cleaning travelling work the loose articles or bulk material travelling gradually through a drum or other container, e.g. by helix or gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/045—Cleaning involving contact with liquid using perforated containers, e.g. baskets, or racks immersed and agitated in a liquid bath

Abstract

The present invention relates to a method and a machine for cleaning' metal mesh type protective clothing soiled with meat remains. The present invention is based on the finding that metal mesh type clothing soiled with 5 meat remains can. be very effectively cleaned. in a drum type washing machine at elevated temperatures using a washing composition in large batches.

Description

© 2020880 © B1 OCTROOI © Aanvraagnummer: 2020880 © Aanvraag ingediend: 4 mei 2018 © Int. Cl.:
B08B 3/04 (2018.01) B08B 3/06 (2019.01) D06F
21/04 (2019.01) (© Afsplitsing van aanvraag , ingediend @ Voorrang:
Aanvraag ingeschreven: 12 november 2019 (43) Aanvraag gepubliceerd:
© Octrooihouder(s):
Unikon B.V. te Barneveld © Uitvinder(s):
Willem Frans Neels te LOCHEM
Marinus Jan van den Brink te BARNEVELD
47) Octrooi verleend:
november 2019 © Gemachtigde:
ir. F.A. Geurts c.s. te Den Haag © Octrooischrift uitgegeven:
november 2019
54) Method and machine for cleaning metal mesh type protective clothing
The present invention relates to a method and a machine for cleaning metal mesh type protective clothing soiled with meat remains. The present invention is based on the finding that metal mesh type clothing soiled with meat remains can be very effectively cleaned in a drum type washing machine at elevated temperatures using a washing composition in large batches.
B1 2020880
Dit octrooi is verleend ongeacht het bijgevoegde resultaat van het onderzoek naar de stand van de techniek en schriftelijke opinie. Het octrooischrift komt overeen met de oorspronkelijk ingediende stukken.
NLP203320
Method and machine for cleaning metal mesh type protective clothing
The present invention relates to a method and a machine for cleaning metal mesh type protective clothing soiled with meat remains .
Introduction
Meat packing and processing industries involve manual or semi-manual cutting operations. Safety regulations require that the person operating the cutting equipment or device wears protective clothing, such as gloves and/or an apron made of metal mesh material. Such clothing is commonly referred to as chainmail protective clothing.
Because the clothing is in constant contact with food, it has to be cleaned on a regular basis. This has to be done thoroughly in order to minimize risks of food contamination by for instance harmful microorganisms.
The metal mesh structure causes cleaning difficulties, because during operation meat sticks in the crevices and spaces of the metal mesh structure. Meat and fish particles, in particular sinews tend to be sticky and have a strong tendency to get stuck in the mesh structure of the protective clothing.
Various methods for cleaning metal mesh type protective clothing have been proposed.
For instance, FR2647038(Al) describes a method for cleaning chainmail gloves, wherein a) a glove is placed on an artificial hand mounted for this purpose firmly on a frame which holds it in a fixed position; b) the glove is impregnated with a detergent solution which partially dis2 solves waste accumulated between the links of said glove;
c) the glove is washed and then rinsed by spraying hot water at high pressure onto it to expel the dissolved impurities and undissolved impurities from said glove; d) the glove is impregnated with a bactericidal solution; and e) the cleaned glove is removed from the artificial hand.
FR2711324 (Al) also describes the use of placing a chainmail glove on an artificial hand. In this document an apparatus is described for cleaning a chainmail glove mounted on such an artificial hand by means of jets of water sprayed through a number of nozzles and revolving injectors, the water being under pressure.
EP2425901 and NL9201579 describe devices for cleaning chainmail gloves, wherein a chainmail glove to be cleaned is slipped over a nozzle. The glove is then cleaned by means of high pressure water from said nozzle.
The above methods and devices do not allow cleaning metal mesh type protective clothing in large batches.
This is in particularly disadvantageous in large slaughterhouses. For instance, when many workers of a slaughterhouse take a break at a time, many gloves will have to be cleaned simultaneously. If this cleaning would take a long time, the slaughterhouse would need at least double the amount of protective clothing to prevent lag time and delays.
Moreover, due to the fact that each piece of protective clothing needs to be handled separately with the cleaning methods known in the art, it is common practice that dedicated personnel is hired for cleaning of the protective clothing.
Furthermore, the methods in the art make use of high pressure cleaning techniques which use a lot of water and energy. High pressure cleaning techniques also require that protective clothing can be directly reached by a spray nozzle to ensure effective cleaning, thus limiting the amount of pieces of protective clothing that can be cleaned simultaneously.
The present invention aims to overcome these advantages .
Summary of the invention
The present invention is based on the finding that metal mesh type clothing soiled with meat remains can be very effectively cleaned in a drum type washing machine at elevated temperatures using a washing composition in large batches .
In a first aspect the invention relates to a method for batch-wise cleaning of metal mesh type protective clothing, comprising washing of multiple pieces of metal mesh type protective clothing soiled with meat remains simultaneously in a rotatable drum at elevated temperature; wherein washing comprises: supplying a washing liquid into said drum to fill at least a part of said drum containing said multiple pieces of metal mesh type protective clothing with said washing liquid; and rotating said drum to effect tumbling of said multiple pieces of metal mesh type protective clothing in and out of the washing liquid.
In a second aspect the invention relates to a drum type washing machine for batch-wise cleaning of metal mesh type protective clothing soiled with meat remains, comprising a first chamber adapted to contain washing liquid, a drum contained in said first chamber and rotatable with respect to a horizontal axis of the washing machine by receiving a rotational force from a driving motor, the drum having a plurality of pores allowing liquid to pass through the drum, the drum having a receiving opening for receiving a batch of multiple pieces of metal mesh type protective clothing soiled with meat remains; wherein said first chamber comprises a washing liquid inlet and a washing liquid outlet; a filter unit located downstream of said washing liquid outlet adapted to filter meat remains out of washing liquid; and recirculation means configured to recirculate filtered washing liquid back into the first chamber via the washing liquid inlet .
It is preferred that the method of the invention is carried out with the drum type washing machine according to the invention.
Short description of the drawings
Fig. 1 shows a perspective view of a schematic representation of an exemplary embodiment of the drum type washing machine according to the invention.
Fig. 2 shows a front view of the drum type washing machine of Fig. 1.
Fig. 3 shows a side view of the right side of the drum type washing machine of Fig. 1.
Fig. 4 shows a rear view of the of the drum type washing machine of Fig. 1.
Fig. 5 shows a top view of the washing machine of
Fig. 1.
Detailed description of the invention
The present invention allows cleaning of steel mesh type protective clothing in large batches in a few minutes time. For instance, in accordance with the invention it becomes possible to clean at least 200 chainmail gloves simultaneously in a few minutes time. This way the full stock of protective clothing can be cleaned during lunch or coffee breaks and taken again when work is resumed. The present invention removes the necessity to have a large overstock of protective clothing. The use of a rotating drum to effect tumbling of the protective clothing in and out of the washing liquid inside drum effects full contact of the washing liquid with any piece of protective clothing and the inventor has observed very effective cleaning in a few minutes.
The invention is directed to the cleaning of steel mesh type protective clothing. Steel mesh type clothing may also be referred to as chainmail protective clothing, and these terms are used interchangeably in this application. Said steel mesh type protective clothing may suitably be gloves or aprons. Gloves or aprons or any combination thereof can be cleaned in accordance with the invention .
The present invention is in particular directed to the cleaning of steel mesh type protective clothing soiled with meat remains. The term meat remains is meant to encompass fish meat remains as well as meat remains from any other animal, such as pig, cow, horse, chicken, sheep, etc. The invention is in particular suitable to remove persistent remains which have a tendency of getting stuck between the rings of chainmail structures, such as tendons and sinews, from the crevices and openings of the chainmail .
The combination of washing at elevated temperatures and washing liquid in the method of the invention results in degradation and remains sticking in the protective clothing. To this effect, it is preferred that washing takes place at a temperature above 50 °C, preferably above 60 °C, more preferably above 65 °C. A further beneficial effect of the use of such temperatures is that exposure to these temperatures also leads to disinfection of the protective clothing.
In a preferred embodiment the washing liquid is an alkaline washing composition with a pH between 12 and 14. These compositions are preferably based on sodium hydroxide or potassium hydroxide or a combination thereof. Additives may be added thereto, for instance complexing agents, foam inhibitors and dispersing agents. These compositions in combination with an elevated temperature lead to complete disintegration of soft tissue sticking into the protective clothing in a very short time. As a result meat remains are easily removed from the crevices and spaces of the metal mesh structure. A particularly suitable composition which the inventors have observed to be very effective in this respect comprises sodium hydroxide, potassium hydroxide, ethylene diamine tetra acetate, alanine, n, n, bis (carboxymethyl) -trisodium salt and alkylethoxypropoxylates. These washing liquids are preferably used for washing at a temperature above 65 °C, and preferably between 65 °C and 70 °C. Preferred ratios between these components are 20-25 parts of sodium hydroxide: 2-2,5 parts potassium hydroxide: 1-2,5 parts of ethylene diamine tetra acetate: 1-2,5 parts of alanine, n, n, bis (carboxymethyl) -trisodium salt: 0,5-1 parts of alkylethoxypropoxylate, dissolved in water. Suitable concentrations can be determined based on the persistence of the meat remains which may differ between the particular kind of meat processed.
In view of the preferred washing liquid as described above it is preferred that at least the drum is made of stainless steel. Also the chamber in which the drum is mounted is preferred to have at least a stainless steel surface, because it contains washing liquid. This way the drum and the chamber containing the drum are resistant towards the corrosive properties of the alkaline washing liquid. Furthermore, stainless steel is also wearresistant, which is particularly advantageous because the chainmail protective clothing to be washed would otherwise lead to a limited life span of the rotatable drum.
The drum may suitably have a cylindrical structure, although other structures may also be possible.
It is preferred that the rotating drum during washing is filled only partially with said washing liquid. In a suitable embodiment a drum having a plurality of pores is positioned in a chamber which can be partially filled with washing liquid. The pores in the drum allow liquid to pass through in and out of the drum while rotating. Rotation of the drum results in tumbling of the protective clothing in and out of the washing liquid, resulting in a rinsing action which contributes to the effectivity of the wash treatment. In order to enhance tumbling of protective clothing to maximize proper rinsing with the washing liq uid through the steel mesh of the clothing, the drum preferably contains a plurality of lifting means arranged inside the drum to facilitate tumbling. For this purpose, the drum is preferably equipped with a plurality of lifting ribs arranged inside the drum.
The washing liquid can be discharged from the drum simultaneously with supplying the washing liquid into the drum (continuous washing cycle) or it can be supplied first and discharged subsequently after a predetermined period of rotating the drum (discontinuous washing cycle).
To maximize the effect of rinsing the washing liquid through the steel mesh of the clothing it is also preferred that the method of the invention comprises multiple cycles of washing. In a suitable exemplary embodiment 3 to 6 cycles of washing protective clothing in washing liquid for 1 minute at 65 C° and discharging the washing liquid result in complete cleaning and disinfection of the protective clothing.
It is preferred to recycle washing liquid after discharging said washing liquid from said said multiple pieces of metal mesh type protective clothing, for further use of washing the same batch of metal mesh type protective clothing or for use in washing a further batch of multiple pieces of metal mesh type protective clothing. It is for this reason that the drum type washing machine according to the invention is equipped with a filter unit located downstream of the washing liquid outlet of the chamber containing the rotatable drum. This filter unit is adapted to filter meat remains out of washing liquid. After filtration, recirculation means transport the washing liquid back to the chamber containing the drum. Such recirculation means may for instance be realized by means of a suitable tubing configuration and a pump. In one embodiment the drum type washing machine according to the invention comprises a second chamber positioned downstream of said filter unit, which second chamber is configured to receive filtered washing liquid. In this embodiment said recirculation means is configured to recirculate filtered washing liquid back to the first chamber from said second chamber. In another embodiment a second chamber is positioned below the first chamber and in fluid connection therewith by means of a fluid connection. In this embodiment said fluid connection is configured such that used washing liquid can stream from the first chamber to the second chamber by gravitational force. Such fluid connection can instance be a pipe, optionally with a sieve of filter therein. In this embodiment the filter may be provided upstream or downstream of the second chamber.
In one embodiment the method of the invention comprises
a) supplying washing liquid into said drum during rotation of the drum while discharging washing liquid from said rotating drum;
b) directing the discharged washing liquid over a filter to filter out meat remains from said discharged washing liquid,
c) redirecting of the filtered washing liquid back into said drum, wherein steps a) to c) take place continuously during a predetermined period of time. In this embodiment washing liquid is continuously pumped in and out the drum while rotating, so that a constant level of washing liquid is maintained in the drum. The discharged washing liquid is directed through a filter and subsequently directed into the drum again. The washing liquid thus continuously cycles in and out the drum with a filtration step between discharging the washing liquid from the drum and supplying it back again. The inventors have observed that when washing liquid is continuously circulated a number of advantageous effects are achieved. The inventors have namely observed that heat loss occurs, because the recycling allows the washing machine to warm up. The inventors have also observed that foaming of the washing liquid was markedly reduced compared to washing protocols where washing liquid was not continuously circulated. In addition, the inventors have observed that by continuous circulation meat remains are removed more effectively. This way meat remains can be removed in shorter time and less concentrated washing liquids can be used.
In a further embodiment the method of the invention comprises recycling of washing liquid and multiple cycles of washing, wherein at least a first cycle comprises:
a) supplying washing liquid into said drum during rotation of the drum while discharging washing liquid from said rotating drum;
b) directing the discharged washing liquid over a filter to filter out meat remains from said discharged washing liquid,
c) redirecting of the filtered washing liquid back into said drum, wherein steps a) to c) take place continuously during said first cycle. The advantages of continuous circulation have been discussed above. It is preferred that in case multiple washing cycles are applied, that only the first cycle takes place under continuous circulation, because the inventors have observed that one washing cycle of continuous circulation already removes most of the meat remains, so that next steps may require less intensive procedures. This saves energy. The subsequent cycles may then be performed discontinuously, i.e. by supplying a washing liquid into said drum to fill at least a part of said drum containing said multiple pieces of metal mesh type protective clothing with said washing liquid; rotating said drum to effect tumbling of said multiple pieces of metal mesh type protective clothing in and out of the washing liquid; and discharging the washing liquid after supplying the same washing liquid and after a predetermined period of rotation. Of course, if energy reduction is less important, all washing cycles may be performed under continuous circulation of washing liquid. This results in very short times required for cleaning steel mesh type protective clothing.
In between wash cycles or during recycling washing liquid chemicals may be replenished. It is therefore preferred that the drum type washing machine according to to the invention comprises a means for replenishing washing liquid chemicals. Such means may comprise a reservoir for washing liquid chemicals and a dosage pump for dosing the chemicals into the washing liquid, for instance into the second chamber.
It is preferred that washing is followed by rinsing said said multiple pieces of metal mesh type protective clothing with water to remove residual washing liquid, because residual washing chemicals may be harmful for the user. It is highly preferred that also the outside of the drum and the chamber in which the drum is mounted are rinsed with water, because also there remaining washing liquid and meat remains may be present, which may otherwise enter the drum. Therefore, the machine according to the invention preferably comprises means for charging and discharging water into and from said first chamber. Such means may suitably comprise pipes and a pump for pumping the water into the drum. A nozzle for spraying water may be provided inside the drum for this purpose, for instance protruding from the horizontal axis that drives rotation of the drum. Also inside the chamber but on the outside of the drum one or more nozzles may be provided for spraying water in the parts of the chamber surrounding the drum. For disinfection purposes, it is preferred that rinsing with water preferably takes place at higher temperatures than the temperatures used for washing with washing liquid. It is preferred that rinsing with water takes place with water having a temperature of 70 °C or more, such as 75 °C or more, or 85 °C or more.
The method according to the invention may also comprise a step of drying said protective clothing after washing and rinsing, for instance by centrifuging the drum.
The machine according to the invention may be a top load type or a front load type machine. It is preferred that the machine is a front load type machine because this facilitates placing the pieces of soiled chainmail protective clothing in the machine and taking them out. It is therefore preferred that the machine has a front section with said receiving opening for receiving a batch of multiple pieces of metal mesh type protective clothing soiled with meat remains. In case the machine is a top load type machine it has a top section with said receiving opening for receiving a batch of multiple pieces of metal mesh type protective clothing soiled with meat remains.
In a further preferred embodiment the machine according to the invention has a front and back section, one having said receiving opening for receiving a batch of multiple pieces of metal mesh type protective clothing soiled with meat remains, the other having an opening for taking out cleaned multiple pieces of metal mesh type protective clothing. In this respect the method also may comprise placing a batch of multiple pieces of metal mesh type protective clothing soiled with meat remains in the receiving opening, followed by washing, and after washing, taking out cleaned multiple pieces of metal mesh type protective clothing from other opening. This embodiment is particularly suitable in case of short breaks during the working day at a slaughterhouse. The machine may be positioned suitably at a place with the receiving opening directed to the route where workers pass on the way to a resting place (the dirt side) and with the other opening directed to the route where workers pass after having their break in the resting place (the clean side). The workers may then conveniently drop their gloves and/or aprons in the receiving opening on the way to their break, and take them back from the other opening on the route back to the work place.
Detailed description of the drawings
The invention will now be further elucidated in the attached drawings. The following explanation is meant to illustrate and explain the invention and not to limit the claims .
Figs. 1 to 5 show an exemplary embodiment of the drum type washing machine 1 for batch-wise cleaning of metal mesh type protective clothing soiled with meat remains according to the invention. Fig. 1 shows a perspective view. Fig. 2 shows a front view of the same machine. Fig. 3 shows a side view of the right side of of the same machine. Fig. 4 shows a rear view of the same machine. Figure 5 shows a top view of the same machine.
In the machine shown in Figs. 1-5 the washing machine is a front load washing machine which comprises a first chamber 2 in housing 3. For purposes of explanation the top side of the housing is omitted from the drawing so that the position of the drum in the first chamber can be visualized. Operation of the machine is controlled via control unit 4. First chamber 2 has a stainless steel surface to adapt it to contain highly alkaline washing liquid. Rotatable drum 5 is contained in first chamber 2 and rotatable with respect to a horizontal axis 6 of the washing machine by receiving a rotational force from a driving motor 7. Drum 5 has a cylindrical structure with a plurality of pores 8 allowing liquid to pass through it. Because machine 1 is of a front load type it has a receiving opening 9 for receiving a batch of multiple pieces of metal mesh type protective clothing soiled with meat remains. Receiving opening 9 can be closed by means of door 10 which has a safety lock 11, which for safety reasons is adapted such that the door can only be opened by means when the washing process is completed. The door has hinges 12 to enable opening and closing. For purposes of explanation the part of the door normally covering receiving opening 9 when the machine is in operation is omitted from Figs. 1 and 2 so that the position of the drum in the first chamber and the inside of the drum can be visualized .
In order to supply a washing liquid inside drum 5 to fill a part of it with said washing liquid when the machine is in action washing liquid is pumped from second chamber 13, which is a tank for containing washing liquid, by means of pump 14 via pipes 15 and 16 and chamber inlet 17 into first chamber 2. Washing liquid can be removed from first chamber 2 via chamber outlet 18, which is placed on the bottom of first chamber 2, via pipe 19 by means of pump 20. Pump 20 further pumps the used washing liquid via pipe 21 to filter unit 22. Filter unit 22 is adapted to filter meat remains out of washing liquid by the provision of a fabric filter bag. Filter unit 22 can be opened and closed by means of closing means 23. After passing the filter, the filtered washing liquid is directed back to tank 13 via pipe 24, from which it can be recycled back to first chamber 2.
In situations where filtering is not necessary, for instance when cleaning the machine or when it is desired that washing liquid is not recycled, a side pipe 25 is provided in pipe 19 so that filter unit 22 can be bypassed and exit the machine via outlet 26 in pipe 28. Pipe 28 is also coupled to the tank via tank outlet 29 to enable the tank to be emptied using valve 27.
Heat elements 30 are provided in first chamber 2 and tank 13 to elevate the temperature of the washing liquid. The bars of the heat elements which are not shown in the present drawings extend into first chamber 2 and tank 13. In order to ensure adequate levels of washing liquid in first chamber 2, a floater based water level meter 31 is provided in first chamber 2.
Water for rinsing remaining washing liquid from the washed gloves may be sprayed into drum 5 by nozzle 32. Nozzle 32 is connected via tube 33 to an inlet 34. To control flow through tube 32 a valve 35 is provided. Inlet 34 may be connected to a water source. Inlet 34 is provided with a flow meter 36. Water may also be sprayed into chamber 2 via chamber inlet 37 and pipe 38 which is also connected with inlet 34. Flow through pipe 38 is controlled via valve 39.
Inlet 34 may also be used for supply or replenishment of washing liquid or water into tank 13 via tube 40 which can be controlled by means of valve 41. Liquid enters tank 13 from tube 40 via tank inlet 42.
Washing chemicals or concentrated washing liquid may 10 be dosed into the tank via dosage pump 43. If dosage pump 43 is used, tube 40 may be used for supply of water into tank 13 via tank inlet 42 from a water source connected to tube inlet 34 in order to dilute the washing chemicals or concentrated washing liquid to concentrations suitable for 15 washing chainmail protective clothing.

Claims (25)

CONCLUSIESCONCLUSIONS 1. Werkwijze voor het batch-gewijs reinigen van beschermende kleding van het metalen mazen type, omvattende het gelijktijdig in een roteerbare trommel bij verhoogde temperatuur wassen van meerdere stuks beschermende kleding van het metalen mazen type verontreinigd met vleesresten; waarbij het wassen omvat:A method for batchwise cleaning of protective clothing of the metal mesh type, comprising simultaneously washing a plurality of protective clothing of the metal mesh type contaminated with meat residues in a rotatable drum at an elevated temperature at an elevated temperature; wherein washing comprises: het toevoeren van een wasvloeistof in de trommel om ten minste een deel van de trommel die de meerdere stuks beschermende kleding van het metalen mazen type bevat te vullen met de wasvloeistof; en het roteren van de trommel om tuimelen van de meerdere stuks beschermende kleding van het metalen mazen type in en uit de wasvloeistof te bewerkstelligen.feeding a washing fluid into the drum to fill at least a portion of the drum containing the multiple pieces of metal mesh type protective clothing with the washing fluid; and rotating the drum to cause tumbling of the multiple pieces of metal mesh type protective clothing into and out of the wash liquor. 2. Werkwijze volgens conclusie 1, omvattendeThe method of claim 1, comprising a) het toevoeren van wasvloeistof in de trommel tijdens rotatie van de trommel terwijl wasvloeistof uit de roterende trommel verwijderd wordt;a) supplying washing liquid to the drum during rotation of the drum while washing liquid is removed from the rotating drum; b) het leiden van de verwijderde wasvloeistof over een filter om vleesresten uit de verwijderde wasvloeistof te filteren;b) passing the removed washing liquid over a filter to filter residual meat from the removed washing liquid; c) het terug in de trommel herleiden van de gefilterde wasvloeistof;c) recycling the filtered washing liquid back into the drum; waarbij stappen a) tot c) continu gedurende een vooraf bepaalde tijdsperiode plaats hebben.wherein steps a) to c) take place continuously for a predetermined period of time. 3. Werkwijze volgens één van de voorgaande conclusies, omvattende meerdere wascycli.Method according to one of the preceding claims, comprising a plurality of washing cycles. 4. Werkwijze volgens één van de voorgaande conclusies, omvattende meerdere wascycli, waarbij ten minste een eerste cyclus omvat:A method according to any one of the preceding claims, comprising a plurality of washing cycles, wherein at least a first cycle comprises: a) het toevoeren van wasvloeistof in de trommel tijdens rotatie van de trommel terwijl wasvloeistof uit de roterende trommel verwijderd wordt;a) supplying washing liquid to the drum during rotation of the drum while washing liquid is removed from the rotating drum; b) het leiden van de verwijderde wasvloeistof over een filter om vleesresten uit de verwijderde wasvloeistof te filteren;b) passing the removed washing liquid over a filter to filter residual meat from the removed washing liquid; c) het terug in de trommel herleiden van de gefilterde wasvloeistof;c) recycling the filtered washing liquid back into the drum; waarbij stappen a) tot c) continu gedurende een vooraf bepaalde tijdsperiode plaats hebben.wherein steps a) to c) take place continuously for a predetermined period of time. 5. Werkwijze volgens één van de voorgaande conclusies, omvattende een stap van het recirculeren van wasvloeistof na het verwijderen van de wasvloeistof van de meerdere stuks beschermende kleding van het metalen mazen type voor gebruik bij het wassen van een verdere batch van meerdere stuks beschermende kleding van het metalen mazen type .A method according to any one of the preceding claims, comprising a step of recirculating washing liquid after removing the washing liquid from the multiple pieces of metal mesh type protective clothing for use in washing a further batch of multiple pieces of protective clothing from the metal mesh type. 6. Werkwijze volgens één van de voorgaande conclusies, waarbij het wassen gevolgd wordt door het spoelen van de meerdere stuks beschermende kleding van het metalen mazen type met water om residuele wasvloeistof te verwijderen .A method according to any one of the preceding claims, wherein the washing is followed by rinsing the multiple pieces of metal mesh type protective clothing with water to remove residual washing liquid. 7. Werkwijze volgens één van de voorgaande conclusies, verder omvattende een stap van het drogen van de beschermende kleding na het wassen en spoelen.The method of any one of the preceding claims, further comprising a step of drying the protective clothing after washing and rinsing. 8. Werkwijze volgens één van de voorgaande conclusies, waarbij de beschermende kleding handschoenen of schorten of een combinatie daarvan zijn.A method according to any one of the preceding claims, wherein the protective clothing is gloves or aprons or a combination thereof. 9. Werkwijze volgens één van de voorgaande conclusies, waarbij het wassen plaatsvindt bij een temperatuur boven 50 °C, bij voorkeur boven 60 °C, met meer voorkeur boven 65 °C.A method according to any one of the preceding claims, wherein the washing takes place at a temperature above 50 ° C, preferably above 60 ° C, more preferably above 65 ° C. 10. Werkwijze volgens één van de voorgaande conclusies, waarbij de wasvloeistof een alkalische wassamenstelling is met een pH tussen 12 en 14.A method according to any one of the preceding claims, wherein the washing liquid is an alkaline washing composition with a pH between 12 and 14. 11. Werkwijze volgens conclusie 10, waarbij de wasvloeistof gebaseerd is op natriumhydroxide of kaliumhydroxide of een combinatie daarvan.The method of claim 10, wherein the washing fluid is based on sodium hydroxide or potassium hydroxide or a combination thereof. 12. Werkwijze volgens conclusie 11, waarbij de alkalische wassamenstelling natriumhydroxide, kaliumhydroxide, ethyleendiamine tetra-acetaat, alanine,N,N,bis(carboxymethyl)-trinatriumzout en alkylethoxypropoxylaten omvat en waarbij het wassen bij voorkeur uitgevoerd wordt tussen de 65 en 70 °C.The method of claim 11, wherein the alkaline wash composition comprises sodium hydroxide, potassium hydroxide, ethylenediamine tetraacetate, alanine, N, N, bis (carboxymethyl) trisodium salt and alkylethoxypropoxylates and wherein washing is preferably carried out between 65 and 70 ° C . 13. Werkwijze volgens één van de voorgaande conclusies, waarbij de trommel van roestvrij staal is.The method of any one of the preceding claims, wherein the drum is made of stainless steel. 14. Werkwijze volgens één van de voorgaande conclusies, waarbij de trommel meerdere hefmiddelen bevat die gerangschikt zijn in de trommel om tuimelen te vergemakkelijken .A method according to any one of the preceding claims, wherein the drum comprises a plurality of lifting means arranged in the drum to facilitate tumbling. 15. Werkwijze volgens conclusie 8, waarbij de trommel is uitgerust met meerdere hefribben gerangschikt in de t rommel.The method of claim 8, wherein the drum is equipped with a plurality of lifting ribs arranged in the drum. 16. Wasmachine van het trommeltype voor het batchgewijs reinigen van beschermende kleding van het metalen mazen type verontreinigd met vleesresten, omvattende een eerste kamer die is ingericht om wasvloeistof te bevatten, een trommel opgenomen in de eerste kamer en roteerbaar met betrekking tot een horizontale as van de wasmachine door het ontvangen van een rotatiekracht van een aandrijfmotor, waarbij de trommel meerdere gaten heeft die vloeistof door de trommel kunnen laten gaan, waarbij de trommel een ontvangstopening heeft voor het ontvangen van een batch van meerdere stuks beschermende kleding van het metalen mazen type verontreinigd met vleesresten;A drum type washing machine for batch cleaning of metal mesh type protective clothing contaminated with meat residues, comprising a first chamber adapted to contain washing liquid, a drum accommodated in the first chamber and rotatable with respect to a horizontal axis of the washing machine by receiving a rotational force from a drive motor, wherein the drum has a plurality of holes that allow liquid to pass through the drum, the drum having a receiving opening for receiving a batch of multiple pieces of metal mesh type contaminated clothing with meat scraps; waarbij de eerste kamer een wasvloeistofinlaat en wasvloeistofuitlaat omvat;wherein the first chamber comprises a wash liquid inlet and wash liquid outlet; een filtereenheid stroomafwaarts van de wasvloeistofuitlaat geplaatst en ingericht om vleesresten uit de wasvloeistof te filteren; en recirculatiemiddelen die zijn ingericht om gefilterde wasvloeistof via de wasvloeistofinlaat terug in de eerste kamer te recirculeren.a filter unit positioned downstream of the washing liquid outlet and arranged to filter residual meat from the washing liquid; and recirculating means adapted to recirculate filtered wash liquid back into the first chamber via the wash liquid inlet. 17. Wasmachine van het trommeltype volgens conclusie 16, omvattende een tweede kamer stroomafwaarts geplaatst van de filtereenheid, waarbij de tweede kamer ingericht is om gefilterde wasvloeistof te ontvangen, en waarbij de recirculatiemiddel ingericht zijn om gefilterde wasvloeistof vanuit de tweede kamer terug naar de eerste kamer te recirculeren .A drum type washing machine according to claim 16, comprising a second chamber located downstream of the filter unit, wherein the second chamber is adapted to receive filtered washing fluid, and wherein the recirculating means is adapted to return filtered washing fluid from the second chamber to the first chamber to recirculate. 18. Wasmachine van het trommeltype volgens conclusie 16, omvattende een tweede kamer stroomafwaarts geplaatst van de filtereenheid, waarbij de tweede kamer onder de eerste kamer geplaatst is en in vloeistofverbinding daarmee is door middel van een vloeistofverbinding, waarbij de vloeistofverbinding zodanig geconfigureerd is dat gebruikte wasvloeistof vanuit de eerste kamer naar de tweede kamer kan stromen door zwaartekrachtwerking.A drum type washing machine according to claim 16, comprising a second chamber located downstream of the filter unit, the second chamber being positioned below the first chamber and in fluid communication therewith by means of a fluid communication, the fluid communication being configured such that used washing fluid can flow from the first chamber to the second chamber by gravity action. 19. Wasmachine van het trommeltype volgens één van de conclusies 16 tot 18, met een voorsectie met de ontvangstopening voor het ontvangen van een batch van meerde re stuks beschermende kleding van het metalen mazen type verontreinigd met vleesresten.A drum type washing machine according to any one of claims 16 to 18, having a front section with the receiving opening for receiving a batch of multiple pieces of metal mesh type protective clothing contaminated with meat scraps. 20. Wasmachine van het trommeltype volgens conclusie 19, met een voorsectie en een achtersectie, waarbij de één de ontvangstopening voor het ontvangen van een batch van meerdere stuks beschermende kleding van het metalen mazen type verontreinigd met vleesresten heeft, waarbij de ander een opening voor het uitnemen van gereinigde meerdere stuks beschermende kleding van het metalen mazen type heeft.A drum type washing machine according to claim 19, having a front section and a rear section, wherein one has the receiving opening for receiving a batch of multiple pieces of metal mesh type protective clothing contaminated with meat scraps, the other having an opening for the take out cleaned multiple pieces of protective clothing of the metal mesh type. 21. Wasmachine van het trommeltype volgens één van de conclusies 16 tot 18, met een bovensectie met de ontvangstopening voor het ontvangen van een batch van meerdere stuks beschermende kleding van het metalen mazen type verontreinigd met vleesresten.A drum type washing machine according to any one of claims 16 to 18, with an upper section with the receiving opening for receiving a batch of multiple pieces of metal mesh type protective clothing contaminated with meat scraps. 22. Wasmachine van het trommeltype volgens één van de conclusies 16 tot 21, verder omvattende een middel voor het verversen van wasvloeistofchemicaliën.The drum type washing machine according to any one of claims 16 to 21, further comprising a means for refreshing washing liquid chemicals. 23. Wasmachine van het trommeltype volgens één van de conclusies 16 tot 22, verder omvattende middelen voor het invoeren en verwijderen van water in en uit de eerste kamer.The drum type washing machine according to any of claims 16 to 22, further comprising means for introducing and removing water into and from the first chamber. 24. Gebruik van een wasmachine van het trommeltype voor het batch-gewijs reinigen van beschermende kleding van het metalen mazen type verontreinigd met vleesresten.24. Use of a drum type washing machine for batch cleaning of metal mesh type protective clothing contaminated with meat residues. 25. Werkwijze volgens één van de conclusies 1 tot 15, waarbij het wassen van de meerdere stuks beschermende kleding van het metalen mazen type uitgevoerd wordt met de wasmachine van het trommeltype volgens één van de conclusies 15 tot 23.A method according to any one of claims 1 to 15, wherein washing of the multiple pieces of metal mesh type protective clothing is carried out with the drum type washing machine according to one of claims 15 to 23. -o-o-o1-o-o-o1 F®h* Ar®®®®F®h * Ar®®®® S R OCX JCK/G&S R OCX JCK / G & J8 Lla ï irffln Xfannfft H ffinnnnrJ8 Lla ï ir ffl n Xfannfft H ffinnnnr 22 3522 35 mn se©mn se © UH SUH S 99©99 © SS 9 9 © ©9© ssöqoosssssss©® © oo ® © ® ® ©©οοοο©φοοοο®φ® ©©©ΘΦ&ΦΦ ©©ΦϩϮΦΦΦΦΦΦΦΦSS 9 9 © © 9 © ssöqoosssssss © ® © o o ® ® ® ® © 038309999999688 o Ö $ © Ö & SS 03030969999998 © Ö $ © δ $ SS ©eeee$$sösess%038309999999688 o Ö © © & SS 03030969999998 © Ö $ © δ $ SS © eeee $$ sösess% 8 8 6 © © smmo 88 6® 3 8896699©8 8 6 © © smmo 88 6® 3 8896699 © 8869 © 886969© :U 6 9 © 886969© iU 9 6 ©8869 © 886969 ©: U 6 9 © 886969 © iU 9 6 © 8899996 iS6 9 6 98899996 IS6 9 6 9 88999968899996 8899©8899 © 9899699898996998 ΟΟΦΟΦΦ©© ©ΘΦΟΘΟΦΦΦΦΦ©©©©© © © © © ΟΟΦΘΦΦΦ© ©000ΟΟΦΦΦΦΦΦΦΦΦ ©ΟΦΟΦΦΦΦ ©000ΟΟΦΦΦΦΦΦΦΦΦ ©©ΦΟΦΦΦΦΟΟΦΘΦΦΦ © © 000ΟΟΦΦΦΦΦΦΦΦΦ © ΟΦΟΦΦΦΦ © 000ΟΟΦΦΦΦΦΦΦΦΦ © ¥ ΦΟΦΦΦΦ ΟΟ©ΟΟΟ®Φ©©©©Φ®ΦΟΟ © ΟΟΟ®Φ © ©©©©ΦΦΦ Ο0ΦΟΦΦΦΦ ©©©ΟΟΟΦΦ©©©®®©® ©ΟΦ0ΦΦΦΦ ©φφοοοφφφφφφφφφ ©©©ΟΦΦΦΦ©0ΦΟΦΦΦΦ © ©©©ΟΟΟΦΦ©©©©©©©©©©©©©©©©© ÖÖOOOQCBSJ® Φ © Φ ©Φ© ö $ $ s sssi ©oooooooG^mss © © © 6 9 $ SS öööö§möii^ © © $ $ m« ©©©©©$9©$8@$&s © © « ® ΰ δ 8i o©©©o©$m@9$88ÖÖOOOQCBSJ® Φ © ö © Φ © ö $ $ s sssi © oooooooG ^ mss © © © © 6 9 $ SS öööö§möii ^ © © $ $ m «© ©©©©© $ 9 © $ 8 @ $ & s © ©« ® ΰ δ 8i © © ¥ o © $ m @ 9 $ 88 0 O 3 © © 9 SS0 O 3 © © 9 SS 03030099696668 © © 3 © 9 9 SS ©3030060099668 © © © ® 3 9 SS ©O3O83G999969803030099696668 © © 3 © 9 9 SS © 3030060099668 © © © ® 3 9 SS © O3O83G9999698
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