WO2008057013A1 - Procédé permettant de cirer du fromage - Google Patents

Procédé permettant de cirer du fromage Download PDF

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Publication number
WO2008057013A1
WO2008057013A1 PCT/SE2006/001262 SE2006001262W WO2008057013A1 WO 2008057013 A1 WO2008057013 A1 WO 2008057013A1 SE 2006001262 W SE2006001262 W SE 2006001262W WO 2008057013 A1 WO2008057013 A1 WO 2008057013A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
wax
cheese
waxing
baffle plate
Prior art date
Application number
PCT/SE2006/001262
Other languages
English (en)
Inventor
Bengt Hagström
Tobias Andersson
Per Gösta PERSSON
Peter Isacsson
Original Assignee
Vantec System Ab
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 Vantec System Ab filed Critical Vantec System Ab
Priority to PCT/SE2006/001262 priority Critical patent/WO2008057013A1/fr
Publication of WO2008057013A1 publication Critical patent/WO2008057013A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J27/00—After-treatment of cheese; Coating the cheese
    • A01J27/02—Coating the cheese, e.g. with paraffin wax
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23C—DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; MAKING THEREOF
    • A23C19/00—Cheese; Cheese preparations; Making thereof
    • A23C19/14—Treating cheese after having reached its definite form, e.g. ripening, smoking
    • A23C19/16—Covering the cheese surface, e.g. with paraffin wax
    • A23C19/163—Covering the cheese surface, e.g. with paraffin wax with a non-edible liquid or semi-liquid coating, e.g. wax, polymer dispersions

Definitions

  • the invention concerns a cheese waxing system comprising a container comprising an upper rim, a bottom part and side walls interconnecting the bottom part and the upper rim.
  • the container is arranged to be at least partly filled with wax for cheese dipping purposes and the waxing system comprises a heating system arranged to heat the wax into a liquid state.
  • the invention also concerns a method for waxing a cheese wheel.
  • the melting of the wax has been done by introducing electrical heaters into a container/tray filled with wax.
  • the electrical heaters are arranged to heat up the wax to a desired temperature of about 135 0 C.
  • the heaters are controlled by a control system that controls the heat by changing the electrical effect supplied to the electrical heaters.
  • a problem with electrical heaters is that that the surface temperature of the electrical heater has to be much higher than the desired wax temperature in the container in order to get an average temperature of the wax in the container having the desired temperature.
  • the surface temperature of electrical heaters may become so hot that the surface temperature exceeds the flash point of the wax and the wax may then catch on fire.
  • One such condition is when the electrical heaters are faulty or becomes faulty, for example a short circuit, etc.
  • Another condition is when the control system wrongly feeds too much effect to the electrical heater, for example when there has been a stop in the production line and the wax has become too cold and the control system tries to rectify this by an increase in heat.
  • a control system may then allow an excess amount of heat to be fed to the wax in order to raise the average temperature of the wax.
  • the wax layer closely adjacent the electrical heaters has very little motion and only circulates because of its own motion due to temperature differences in the wax.
  • the excess heat may therefore locally bring wax, adjacent the electrical heat, to a temperature above the flash point.
  • the use of electrical heaters is thus a dangerous process step in a cheese waxing manufacturing plant, because of the potential risk of fire.
  • the object of the present invention is to meet the above need and to rectify the above described deficiencies.
  • the invention refers to a cheese waxing system comprising a container comprising an upper rim, a bottom part and side walls interconnecting the bottom part and the upper rim.
  • the container is arranged to be at least partly filled with wax for cheese dipping purposes, wherein the waxing system comprises a heating system arranged to heat the wax into liquid phase, characterized in that the heating system comprises a first heat exchanger arranged to exchange heat between a first fluid suitable for the food industry and the wax, wherein the heating system comprises a first tubing arrangement arranged to circulate the wax from the container via the first heat exchanger and back to the container.
  • the system also advantageously comprises a second tubing arrangement in which the first fluid flows.
  • Another advantage of the invention is that the wax in the container constantly is in motion, due to the first tubing arrangement, which reduces the risk of the wax forming a layer in or on any of the parts involved in the system.
  • Another advantage is that the wax quickly can be brought back into operation conditions, i.e. the correct temperature, by increasing the temperature of the wax in the first tubing arrangement and also increasing the flow rate of the wax in the first tubing arrangement.
  • the process of increasing the temperature of the wax will be explained further below.
  • control system is easy to maintain because all parts are easy to disassemble and to reassemble.
  • the container can be made smaller because the previously used electrical heater is removed from the container.
  • the container can be of the same size as in prior art, but with a larger area to be used for dipping the cheese wheels, i.e. it is possible to process a larger amount of cheese during a corresponding time period.
  • the container comprises an inlet box connected to one end of the first tubing arrangement.
  • the inlet box is arranged in the container so that an inlet opening allows wax to flow in a first direction in the container.
  • the inlet opening is arranged laterally to the flow direction along the inlet box in order to give an optimum distribution of wax in the container.
  • the first tubing arrangement comprises an outlet opening preferably positioned in the container between the wall and the inlet box, and preferably at the bottom part of the container.
  • the position of the outlet opening can be varied dependent on the design of the container in order to achieve the best re-circulation properties of the wax in the container.
  • the outlet opening may be positioned above the inlet box.
  • the container may have a cross-section, as seen from above, being rectangular, square, oval, round or a mix of these geometrical shapes.
  • the first tubing arrangement may thus be arranged to feed wax from the bottom part of the container to the first heat exchanger and then back to the inlet box.
  • the inlet box is also advantageously positioned at the bottom part of the container for ultimate wax distribution purposes.
  • the container comprises a baffle plate positioned to direct the flow of the wax in the container.
  • the baffle plate is advantageously positioned above the inlet box so that the baffle plate divides the container into a first container section and a second container section. The inlet opening then opens out into the second container section.
  • the baffle plate is positioned at a distance from the upper rim and is arranged to force wax to flow from the second container section to the first container section over an upper edge of the baffle plate.
  • the baffle plate is also used for level control of the wax. Due to the positioning of the baffle plate and the inlet box, the flow pattern of the wax in the container is as follows:
  • the melted wax forms a pool of wax in the container.
  • the pool of wax is divided by the baffle plate but the wax in the first container section is in fluid communication with the second container section, and vice versa.
  • the inlet box and the baffle plate gives a flow pattern in the wax pool where a bottom part of the wax pool follows the stream of wax forced out from the inlet opening.
  • the stream of wax then follows the above flow pattern so that an upper part of the wax pool flows in one direction and the bottom part of the wax pool in the opposite direction.
  • the counter-stream directions gives a shearing force forming eddies which mixes the both streams.
  • the waxing system is intended to be used when waxing a piece of cheese and this waxing process comprises the step of dipping the cheese into the container.
  • the cheese is dipped into the second container section.
  • the cheese is dipped such that both the above described counter-streams are crossed. This crossing adds to the above described mixing of the counter-streams.
  • the baffle plate comprises an opening arranged in an upper part of the baffle plate at a distance from the upper edge.
  • the opening has the advantage of balancing the flow of the wax over the edge of the baffle plate when the cheese is dipped into the wax pool by allowing a part of the wax to flow through the baffle plate.
  • the re-circulation of the wax gives the advantage that the wax can be fed through a filter device for filter purposes, for example for filtering particles.
  • a suitable filter device for the invention is arranged to filter out particles with a size larger than 1 mm.
  • the temperature of the wax in the container can range from about 70 0 C to about 140 0 C.
  • the first fluid is advantageously a liquid capable of being heated to about 140 0 C in atmospheric pressure without changing into a gas phase.
  • One suitable oil is Casida Fluid HT which is a synthetic heat transferring oil adapted for the food industry.
  • the wax shall be heated to a temperature below 100 0 C the first fluid can be heated water.
  • the cheese waxing system advantageously comprises a second heat exchanger and a third tubing arrangement arranged to exchange heat between the first fluid, flowing in the second tubing arrangement, and a second fluid flowing in the third tubing arrangement.
  • the second heat exchanger gives an advantageous intermediate step between the wax and the original heating source. This intermediate step protects the wax from intermittent peaks in heat from the original heat source since the first fluid absorbs the heat peaks and distributes the excess heat within the first fluid. The heat transferred to the wax is thus well controlled and the system provides a smooth and even heat distribution to the wax.
  • the second heat exchanger is especially advantageous when the wax in the container shall be brought to a temperature above 100 0 C since the use of steam directly on the wax could give a disadvantageous flashing of wax into a gaseous state in the heat exchanger.
  • the second fluid is therefore preferably steam, and most preferably superheated steam, which exchanges heat with the first fluid chosen to be able to take up heat without disintegrating.
  • the first fluid then transfers the heat from the steam to the wax in the first heat exchanger with a more soft transition than if steam would have been applied directly in the first heat exchanger.
  • the wax can be any form of wax suitable for use with cheese, for example Dypian made by Procudan.
  • a typical wax has a melting temperature of 70° C, a working temperature of 80-135 0 C and a flash point temperature of 240° C. These parameters may however change somewhat dependent on the composition of the wax and the degree of pollution of the wax.
  • the steam typically has 170° C under 7 bars overpressure when the working temperature of the wax is about 135 0 C.
  • the intermediate first fluid is then heated to a temperature of about 140-150 0 C by the steam, dependent on fluid properties and the properties, e.g. coefficient of utilization, of the first and second heat exchangers.
  • Fig. 1 schematically shows a top view of a container according to the invention, and where;
  • Fig. 2 schematically shows a flow chart and a waxing system according to the invention and a cross-section of the container in figure 1 along line H-Il.
  • Fig. 1 schematically shows a top view of a container 1 comprised in a cheese waxing system 2 according to the invention.
  • the container 1 comprises an upper rim 3, a bottom part 4 and side walls 5 interconnecting the bottom part 4 and the upper rim 3.
  • the container 1 has a rectangular cross- section as seen from above.
  • the container side walls 5 comprise two opposing short sides 6 extending in a lateral direction and two opposing long sides 7 extending in a longitudinal direction.
  • the container 1 is arranged to be at least partly filled with wax 8 for cheese dipping purpose.
  • the cheese is dipped by a dipping means (see fig. 2) from above the container 1 in an essentially vertical movement.
  • a rescue basket 9 comprised in the container 1 for enabling a cheese rescue operation should the cheese fall out from the dipping means.
  • the container 1 comprises an inlet box 10 connected to one end 11 of the first tubing arrangement 12.
  • the inlet box 10 comprises an inlet opening 13 and the inlet box 10 is arranged in the container 1 so that the inlet opening 13 allows wax to flow in a first direction in the container 1.
  • a first direction refers to a direction from that short side 14 where the inlet box 10 is positioned to the opposing short side 15. If the container 1 should have another shape, for example oval, the "first direction” would be in a direction from the inlet opening to an opposing side wall. Since the wax 8 flow is directed to opposing side wall 15, the stream of wax is forced up along the side wall 15 and then back in the opposite direction of the first direction. This enables a good circulation of wax in the container 1.
  • the directions of flow are shown with arrows in figure 2.
  • the container 1 comprises a baffle plate 16 positioned to direct the flow of the wax in the container 1.
  • the baffle plate 16 is positioned above the inlet box 10 so that the baffle plate 16 divides the container 1 into a first container section 17 and a second container section 18.
  • the inlet opening 13 is thus arranged to open out into the second container section 18.
  • the inlet box 10 is positioned adjacent or in close vicinity to the bottom part 4 of the. first container section 17 and the inlet opening 13 is arranged at a distance from the bottom part 4 of the container 1.
  • the inlet box 10 is preferably loosely attached to the container 1 so that the inlet box 10 can be removed from the container 1 , for example during cleaning of the system.
  • the inlet box 10 is positioned at a distance from the side wall 14 in the first container section 17 and an outlet opening 19 is positioned in the side wall 14 at a position in the vicinity of the bottom part 4, preferably between the wall 14 and the inlet box 10.
  • the outlet opening 19 can be used for completely emptying the container 1 , for example when the system needs to be maintained or cleaned.
  • Another advantage of this arrangement is that the wax 8 that has flown over and/or through the baffle plate 16 flows over the inlet box 10 which helps to keep down the temperature difference of the wax 8 in the outgoing and ingoing wax streams.
  • Fig. 2 schematically shows a flow chart and a waxing system 2 according to the invention and a cross-section of the container 1 in figure 1 along line H-Il.
  • the flow chart is incorporated in the waxing system by use of dotted arrows and continuous line arrows showing the flow direction of different fluids in the waxing system.
  • the rescue basket in figure 1 is not shown in figure 2.
  • the dotted arrows concerns wax streams within an object and the continuous line arrows concerns wax streams in the container 1.
  • the container 1 has a double bottom, i.e. has double walls 5 forming a space 20 for allowing hot water to flow between the walls 5 in order to keep a wax pool 21 in the container in a liquid state during, for example, a stop in the system.
  • the container 1 may comprise connector devices 22 for manually connecting tubing (not shown) to the space 20 between the double walls 5.
  • the container 1 may also comprise a fixed tubing arrangement (not shown) for supply of hot water. This tubing arrangement may then be controlled by a control system as described below.
  • the first tubing arrangement 12 is connected to the outlet opening 19 in the bottom part 4 of the container and is arranged to feed wax 8 from the container 1 to the inlet box 10 via a first heat exchanger 23.
  • the outlet opening 19 is arranged in the same section as the inlet box for allowing wax 8 to flow in an essentially circular manner in the container 1.
  • the first tubing arrangement 12 comprises at least one filter device 24 for particle filtration of the wax 8.
  • the filter device 24 may comprise two or more filter units for allowing maintenance of one filter unit while another filter unit is active.
  • the waxing system (2) also comprises a pumping device 25 for pumping the wax 8 in the first tubing arrangement 12.
  • the pumping device 25 may be of any commercially known type and may be positioned any where suitable in the first tubing arrangement 12. However, when the outlet opening 19 is positioned at the bottom part 4 of the container 1 and the pumping device 25 is positioned essentially at the same level, the pumping device does not need to be able to suck wax 8 from the container 1 , but the wax 8 will flow to the pumping device 25 by the pressure from the wax pool 21. However, should the outlet opening 19 and the pumping device 25 be positioned at other locations, the pumping device may need to be able to perform suction as well as pressure.
  • the baffle plate 16 has an upper edge 26 advantageously positioned at a distance from the upper rim 3 and the baffle plate 16 is arranged to force wax to flow from the second container section 18 to the first container section 17 over the upper edge 26 of the baffle plate 16.
  • the baffle plate 16 is also used for level control of the wax 8. Due to the positioning of the baffle plate 16 and the inlet box 10, the flow pattern of the wax 8 in the container is as follows:
  • the baffle plate 16 comprises an opening 27 arranged in an upper part 28 of the baffle plate 16 at a distance from the upper edge 26.
  • cheese 29 is dipped from above into the container in an essentially downward and upward motion by a dipping arrangement 30.
  • the dipping arrangement 30 may comprise a conveyer arrangement 31 and a vertical lift 32.
  • the dipping arrangement 30 may function so that the conveyer arrangement 31 allows the lift 32 to stand still, with reference to a horizontal motion, during the dipping phase, but may also allow a certain horizontal movement of the lift 32. In the latter case the cheese 29 may be dragged in the wax pool 21 in addition to being dipped.
  • the waxing system 2 comprises a heating system 33 arranged to heat the wax 8 into liquid phase and to maintain the wax 8 at a predetermined temperature.
  • the heating system 33 comprises the first heat exchanger 23 arranged to exchange heat between a first fluid 34, suitable for the food industry, and the wax 8.
  • the heating system 33 also comprises a second heat exchanger 35 arranged to exchange heat between the first fluid 34 and a second fluid 36.
  • the heating system 33 comprises the first tubing arrangement 12 arranged to circulate the wax 8 from the container 1 via the first heat exchanger 23 and back to the container 1 as explained above.
  • the heating system 33 also comprises a second tubing arrangement 37 arranged to circulate the first fluid 34 through the first heat exchanger 23 and the second heat exchanger 35.
  • the heating system 33 also comprises a third tubing arrangement 38 arranged to feed the second fluid 36 through the second heat exchanger 35 for exchanging heat to the first fluid 34.
  • the second fluid 36 is preferably steam, most preferably superheated steam.
  • the wax 8 is thus heated by the first fluid 34 which in turn is heated by the second fluid 36.
  • the heating system 33 has the benefit of an easy control of the temperature of the wax 8. Furthermore, since there are fluids transferring the heat, the wax 8 cannot catch on fire due to a too high surface temperature of a heating device.
  • the first and second heat exchangers 23, 35 are preferably all-welded plate heat exchangers of counter-flow-type, but they are not restricted to such heat exchangers. For example, another type may be of a cross-flow-type or a parallel-flow-type.
  • the heating system 33 and the waxing system 2 are controlled by a control system (not shown) comprising a control device, for example a computer.
  • the control system comprises a number of indicators, sensors and measuring devices.
  • a control device for example a computer.
  • the control system comprises a number of indicators, sensors and measuring devices.
  • an advantageous mass flow measuring device 39 comprises also a temperature sensor for measuring the temperature of the wax flowing through the mass flow measuring device 39.
  • the measured values of the temperature of the wax and the mass flow are used together with known properties for the wax 8 for calculation of, for example, volume flow, fluid properties, etc.
  • the mass flow measuring device 39 is double walled so that hot water may be flushed through the space generated by the double walls. This is advantageous since the temperature of the mass flow measuring device 38 may be risen to a level above the wax melting point in the case where wax has solidified du to, for example, a stop in the system.
  • the container 1 may be equipped with a level sensor (not shown) for detection of the surface level 40 of the wax pool 21.
  • the level sensor gives information to the control system when the surface level 40 is below a set threshold and the control system may answer by giving a signal to an operator that more wax 8 need to be added to the pool, or may control an external unit to add wax 8 to the wax pool 21 automatically from a wax reservoir unit 41.
  • the reservoir unit 41 comprises a container filled with wax that is delivered at a temperature well below the melting point of the wax.
  • the waxing system 2 therefore advantageously comprises a fourth tubing arrangement 42 that can deliver hot water to the reservoir unit 41 in order to melt solid phase wax into a liquid phase.
  • the waxing system 2 may also comprise two reservoir units for allowing switching between the two reservoir units when one of the reservoir units shall be replaced by a new one.
  • the reservoir unit 41 also comprises a fifth tubing arrangement 43 for delivering wax directly to the container 1 or to the first tubing arrangement 12.
  • control devices for the filter device 24 that detect when the filter device 24 is full and thus needs to be replaced.
  • An advantageous solution is to use two filter devices and to switch between the filter devices so that when one filter device is full and needs to be maintained, the control system shuts down that filter and switches over to the other filter.
  • the control devices for the filter devices may be a sensor detecting a change in density or the like, or may be a flow measuring device measuring the flow through the filter. The latter may advantageously be done by use of the above described mass flow measuring device together with information on what power the pump needs to be fed in order to maintain the desired mass flow.
  • the filter device gets clogged, the harder the pumping device has to work in order to maintain the flow, and the pump frequency may therefore be used as a measuring tool for the control system in order to find out if the filter needs to be changed. For example, when the pumping device works with a frequency above a predetermined threshold value, the filter is considered to be full and the control system switches to the other filter.
  • the first tubing arrangement may be isolated and/or may comprise double walls for allowing hot water to flow between the walls for keeping the wax in a liquid state.
  • the waxing system may comprise an expansion tank for the first fluid.
  • the first fluid is normally an oil that deteriorates upon contact with oxygen, why the expansion system may comprise an inert gas at a pressure above atmospheric in order to hinder air to come into contact with the oil.
  • heating cabinet 44 keeps the heat since the heat from the third tubing section leaks to its environment, i.e. to the space formed by the heating cabinet 44.
  • the waxing system may comprise only the first heat exchanger under certain conditions. Such conditions are, for example, when the temperature of the wax is below 100 0 C and the first fluid cannot accidentally be heated to a temperature above the flash point of the wax. It is however important that the heating system for the wax is positioned outside the container.

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  • Life Sciences & Earth Sciences (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Dairy Products (AREA)

Abstract

L'invention concerne un procédé et un système (2) permettant de cirer du fromage. Le système (2) comprend un récipient (1) comprenant un rebord supérieur (3), une partie inférieure (4) et des parois latérales (5) interconnectant la partie inférieure (4) et le rebord supérieur. Le récipient (1) est aménagé pour être au moins partiellement rempli de cire (8) afin d'immerger le fromage. Le système de cirage (2) comprend un système de chauffage (33) aménagé pour chauffer la cire (8) en phase liquide. L'invention est caractérisée par le fait que le système de chauffage (33) comprend un premier échangeur de chaleur (23) aménagé pour échanger de la chaleur entre un premier fluide (34), qui est approprié pour l'industrie alimentaire, et la cire (8). Le système de chauffage (33) comprend un premier agencement de tubes (12) qui est agencé pour recycler la cire (8) provenant du récipient à travers le premier échangeur de chaleur (23) et la renvoyer au conteneur (1).
PCT/SE2006/001262 2006-11-07 2006-11-07 Procédé permettant de cirer du fromage WO2008057013A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SE2006/001262 WO2008057013A1 (fr) 2006-11-07 2006-11-07 Procédé permettant de cirer du fromage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE2006/001262 WO2008057013A1 (fr) 2006-11-07 2006-11-07 Procédé permettant de cirer du fromage

Publications (1)

Publication Number Publication Date
WO2008057013A1 true WO2008057013A1 (fr) 2008-05-15

Family

ID=39364748

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2006/001262 WO2008057013A1 (fr) 2006-11-07 2006-11-07 Procédé permettant de cirer du fromage

Country Status (1)

Country Link
WO (1) WO2008057013A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1762909A (en) * 1928-03-30 1930-06-10 Berry Edwin Daniel Apiaratus for use in coating cheeses with paraffin wax or the like and in other analogous operations
US5165472A (en) * 1991-03-18 1992-11-24 Louis Cloutier Heat exchanger with fluid injectors

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1762909A (en) * 1928-03-30 1930-06-10 Berry Edwin Daniel Apiaratus for use in coating cheeses with paraffin wax or the like and in other analogous operations
US5165472A (en) * 1991-03-18 1992-11-24 Louis Cloutier Heat exchanger with fluid injectors

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