JP2002348590A - Method and apparatus for regenerating edible oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for regenerating an edible oil used by frying or the like in a hotel, a restaurant, a factory of packed lunches and daily dishes or the like. SOLUTION: This apparatus for carrying out the treatment for regenerating the used edible oil has a treating vessel 11 for storing water and the edible oil, a water-feeding means 20 for feeding the water to the treating vessel 11, an oil-feeding means 24 for feeding the used edible oil to the treating vessel 11, a filtering means for removing impurities such as frying scum in the used edible oil, a water level-regulating means 14 installed in the position corresponding to the water surface stored in the storing vessel 11, a freely openable regenerated oil-discharging means installed in the position slightly upper than the water level-regulating means 14 or the position corresponding to the stored water level, a freely openable water-discharging means 17 installed in the lower position of the treating vessel 11, and a stirring means 12 for mixing the used edible oil with the water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for regenerating edible oil used in frying or the like in a hotel, restaurant or bento prepared food factory.

[0002]

2. Description of the Related Art Conventionally, edible oil which has been used several times for tempura, fry and the like is oxidized by heat to deteriorate the oil quality, or the mixed fried scum burns to cause a bad smell. When oil with deteriorated oil quality is used,
Since it would impair the taste of the ingredients, they were frequently replaced with new cooking oil, and the old oil was disposed of as waste oil.

However, disposal of waste oil is troublesome,
Disposing of a large amount of waste oil is not only costly, but also causes environmental pollution, which is a problem. There has been a demand for the development of a method and apparatus for effectively using edible oil as much as possible and reducing the amount of oil to be disposed of. Therefore, an attempt was made to remove used fried scum and the like by passing used cooking oil through a filter. The filter has to be replaced easily and frequently, which is troublesome and expensive, and is not practical.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has been made so that a used edible oil which has been once used and deteriorated can be regenerated and reused in a short time.
An object of the present invention is to provide a method and an apparatus for regenerating edible oil which is extremely practical and useful for environmental preservation without impairing the taste of food ingredients, and which contributes to cost reduction.

[0005]

According to the present invention, there is provided a method for regenerating used edible oil, comprising the steps of: supplying a predetermined amount of water into a treatment tank in advance; A step of gradually supplying the used cooking oil heated to the water surface of the treatment tank, and a step of mixing the used cooking oil and water by stirring them after a predetermined amount of used cooking oil is supplied, A step of separating the edible oil and water in a state where the stirring is stopped, a step of discharging the edible oil separated and regenerated by the above step to the outside of the processing tank, and a step of discharging the separated water to the outside of the processing tank. And a method for regenerating edible oil characterized by comprising (1).

[0006] In order to solve the above-mentioned problems, the present invention is characterized in that the temperature of the used edible oil is 100 to 220 ° C when the used edible oil is poured into water in a treatment tank. It is preferable to use the above-mentioned method for regenerating edible oil (claim 2).

[0007] In order to solve the above-mentioned problems, the present invention provides a method wherein the ratio of used edible oil and water to be treated in the treatment tank is in the range of 3: 7 to 7: 3 by volume ratio. Preferably, the above-mentioned method for regenerating edible oil is characterized in that:

In order to solve the above-mentioned problems, the present invention provides an apparatus for regenerating used edible oil,
A treatment tank for storing water and edible oil, a water supply means for supplying water to the treatment tank, an oil supply means for supplying used edible oil to the treatment tank, and contaminants such as fried scum in the used edible oil. Filtering means for removing, water level adjusting means provided at a position corresponding to the water storage surface of the treatment tank, and openable and closable regenerated oil discharging means provided slightly above the water level adjusting means or at a position corresponding to the water storage surface A cooking oil regenerating device, comprising: a drainable means which can be opened and closed freely provided in a lower part of the treatment tank; and a stirring means for mixing used cooking oil with water. 4).

In order to solve the above-mentioned problems, the present invention relates to the above-mentioned edible oil regenerating apparatus, wherein the edible oil regenerating device is provided at least at a lower portion of a regenerated oil discharging means, and water is discharged when regenerated oil is discharged. It is preferable that the edible oil regenerating device is provided with a water stopping means for preventing the edible oil (claim 5).

[0010]

According to the method for regenerating edible oil according to the first aspect of the present invention, as described above, the water stored in the treatment tank in advance is
Since the heated used edible oil is gradually supplied, unlike the case where the heated oil is poured with water, the phenomenon that the water boils or splashes does not occur. In addition, by mixing the oil and water in a mixed state with a stirrer, the heated oil and water are molecularly mixed (Molecular Mixing).
It disperses into fine particles close to the state of the above, the potential energy between the particles is increased with the help of this thermal kinetic energy and mechanical energy, and fine contaminants and It is presumed that fried scum and the like, which are the source of the offensive odor, are extracted into the water. Then, when the stationary state is maintained for a while, the oil or water is united and separated into the original state. After separation, the edible oil is removed and regenerated, removing fried scum and other small contaminants.
Once again, it can be used repeatedly, just like a new cooking oil.

[0011] In the method for regenerating edible oil according to the present invention, the temperature of the edible oil is 100 to 100 ° C. or higher than the boiling point of water.
The thermal kinetic energy can be increased by contacting with water at 220 ° C., and the oil and water can be brought into finer particles by molecular incorporation so that the washing action can work more efficiently.

In the method for regenerating edible oil according to the third aspect of the present invention, the ratio of oil to water to be treated is set within a range of 3: 7 to 7: 3 by volume ratio, so that the balance between the two can be maintained. The particles are kept in a fine particle state and can be efficiently regenerated.

[0013] In the edible oil regenerating apparatus according to the fourth aspect of the present invention, the water supply means can supply an appropriate amount of water determined by the water level adjusting means into the treatment tank. For example, when a water level adjusting outlet having an on-off valve is provided as the water level adjusting means, water is supplied into the treatment tank with the on-off valve of the water level adjusting outlet being open, and the water level is adjusted to the position of this outlet. When the water comes, the water is discharged, so it can be seen that the water level has reached this position. Also, since the reclaimed oil discharge means is provided slightly above the water level adjustment discharge port, only the separated and regenerated edible oil stored at the upper position of the reclaimed oil discharge means is discharged first, and then it is discharged downward. The treated water stored in the section can be discharged from the drainage means.

In the apparatus for regenerating edible oil according to the fifth aspect of the present invention, since a water stopping means is provided at a lower portion of the regenerated oil discharging means, as shown in FIG. When the used cooking oil is discharged, it is possible to prevent the treated water stored in the lower portion from being discharged together.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A typical embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited to the embodiment of the present invention. Figures 1-3
1 is an edible oil regenerating apparatus showing an embodiment of the present invention. In the embodiment of the present invention shown in FIGS. 1 to 3, the regenerating apparatus 1 includes a box-shaped processing tank 11, a stirring unit 12 that extends laterally from a substantially central portion of a side wall of the processing tank 11, And a filtering means 13 for removing contaminants such as fried scum in used cooking oil provided at an upper part of the cooking oil 11. The regenerating apparatus 1 is attached to a bottom 22 of the processing tank 11. It is movably supported by moving wheels 18 such as four casters. Further, it is preferable to provide a lid 21 on the upper part of the processing tank 11 in order to prevent intrusion of dust and scattering of oily water.

Inside the processing tank 11, edible oil (O) and water (W) are stored at an upper portion and an interface (WOS) at an oil-water interface. Is provided with a water level adjusting drain port 14 having an on-off valve 19 as a water level adjusting means near an oil-water interface (WOS),
On the other side, a regenerating oil outlet 15 having an on-off valve 19 serving as a regenerating oil discharging means is provided slightly above the water level adjusting drain port 14. A water stopping plate 16 as a water stopping means for preventing outflow of water when the oil is discharged is provided in a fan shape. Further, a treated water discharge port 17 having an on-off valve 19 as a drain means is provided near the bottom of the side wall.

The treatment tank 11 is formed of a rustproof stainless steel plate in the shape of a box, and the bottom portion 22 is located at a position slightly lower than the surroundings at the front center where the treated water discharge port 17 is provided. As shown in FIG. The stirring means 12
A rotating shaft 12A penetrating the center of the side wall, a disk-shaped agitating portion 12C having a number of blades 12B on one surface and provided at a front end toward the inside of the rotating shaft, and connected to the other end of the rotating shaft Motor 12D. The filtering means 13 forms a stainless steel wire mesh 13A in a dish shape, and supports it with two support rods 13B.
It is hooked on the support rod receiving groove 13C at the upper end of the processing tank 11. The size of the mesh of the wire mesh 13A is not particularly limited, but is preferably in the range of about 0.5 to 5.0 mm for the purpose of effectively removing fried scum and the like.

On the front side wall portion of the treatment tank 11, there are provided a water level adjusting drain port 14, a reclaimed oil discharge port 15, and a treated water discharge port 17 near the bottom. These outlets are normally connected to the tip of a faucet having an on-off valve 19, respectively, so that the contents can be discharged to the outside as appropriate. Above the water level adjusting drain port 14, a water supply port 20 which is a water supply means for supplying water to the treatment tank 11 is provided. If necessary, a discharge pump such as a gear pump can be attached to the reclaimed oil discharge port 15 and the treated water discharge port 17 to forcibly discharge the contents.

The reclaimed oil outlet 15 is connected to the water level adjusting drain 14
The reason why it is provided at a position slightly higher than that is to prevent water from being discharged together when the regenerated oil is discharged to the outside. In addition, because the volume of water increases due to the warming and expansion of the water and the migration of contaminants from the cooking oil, the cooking oil cools and shrinks, and the contaminants move into the water, The water level after the treatment is slightly higher than the water level immediately after the water is supplied into the treatment tank 11. It is preferable that the position of the reclaimed oil outlet 15 be set slightly higher than the water level immediately after water is supplied in consideration of the above-mentioned increase in the water level.

The water level adjusting means is a sensor for detecting moisture in place of the water level adjusting drain 14, for example, a detecting device generally used for a water drop alarm in a bath, etc. A water detector through which current flows,
A transistor or a silicon controlled rectifier (thyristor) for amplifying the weak current, a resistor and a capacitor, and the water detecting portion is provided at a mounting position of the water level adjusting drain port 14 on the side wall portion. The water detector is arranged in place of the port 14, while the detector is connected to the electromagnetic valve 19 of the water supply means. When the water level reaches the water detector, a weak current flows through the water detector and the water is automatically detected. Then, the solenoid valve 19 of the water supply means is closed and the water supply is stopped. You may comprise so that an alarm may be emitted simultaneously.

Further, the used oil outlet 2 of the fryer 23
In conjunction with the solenoid valve 19 of FIG. 4, the used cooking oil of the fryer 23 is discharged simultaneously with the stop of the water supply, and then all the used cooking oil is discharged. After the outflow is no longer detected, the stirring means 12 is operated for a predetermined time set by a timer. After the stirring means 12 is stopped, and the stirring means 12 is stopped for a predetermined time set by the timer, the electromagnetic valve of the regenerated oil discharge port 15 is stopped. When the flowmeter no longer detects the outflow of the regenerated oil, the solenoid valve 19 of the treated water discharge port 17 is opened to discharge the treated water. The above series of operations,
For example, a commercially available sequence controller or programmable logic controller (PLC or PC), which is a control device, can be stored in a ladder program or the like in advance and executed as an automated system.

The water supply means for supplying water into the processing tank 11 is, for example, connected to a commercially available hose from a water tap and the other end of the hose is attached to a water supply port 20 above the processing tank 11. When using the water level detection device, an electromagnetic valve is provided in the middle. The oil supply means for supplying used edible oil to the treatment tank is usually designed so that the edible oil regenerating device of the present invention is designed to fit in a position below a commercial fryer or the like. , The open / close valve 19 of the fryer 23 is opened, and the used edible oil is supplied to the inside of the processing tank 11 through the filtering means 13. Of course, cooking oil used by a plurality of fryers can be collected and processed in one edible oil regenerating apparatus.

In the embodiment of the invention described above, the stirring means 12 is provided laterally from the front side wall portion, but depending on the installation location or the like, the stirring means 12 may be attached downward from above the processing tank 11 to the inside of the processing tank. It is also preferable to be able to be provided detachably. Similarly, instead of providing the reclaimed oil discharge port 15 in the front side wall portion, the hose can be moved upward and downward according to the position of the oil-water interface, with the hose directed downward from above the processing tank 11 into the processing tank. It may be configured to be detachably provided and to suck up regenerated oil by a vacuum or a pump.

[0024]

[Usage Example] A typical usage example of the edible oil regenerating apparatus 1 according to the embodiment of the present invention will be described below. First, the edible oil regenerating apparatus 1 is moved to a space below the fryer 23, and the wheels 18 and the stoppers of the casters are set to the stop position to fix the apparatus so that the apparatus does not accidentally move. Next, the tap of the tap is opened, and tap water is poured into the treatment tank 11. When a predetermined amount of water is supplied and the water level reaches the water level adjustment drain 14,
Water starts to leak from this drain, and at this point the water tap is closed to stop the water.

Next, the valve 19 of the used oil discharge port 24 at the bottom of the fryer 23 is opened, and the heated edible oil is gradually poured onto the filtering means 13 suspended above the treatment tank 11. It is supplied on the water surface in the processing tank 11. The temperature of the edible oil supplied is 100-220 ° C., in particular 160-180 ° C.
C. is preferred. The used cooking oil is heated to such a temperature and does not need to be reheated, which saves thermal energy.

When the used cooking oil in the fryer 23 is completely discharged into the treatment tank 11, the ratio of oil and water is set to be approximately 1: 1 by volume. Here, the upper lid 21 is closed, the motor 12D of the stirring means 12 is rotated, and the stirring section 12C at the shaft end is rotated to mix the oil and water. The time required for stirring is determined by the amount of oil and water to be treated and the stirring capacity, and the time is not limited,
It is preferable to stir for about 2 to 5 minutes to treat about 20 L of edible oil, then stop stirring and let stand for 10 to 15 minutes to separate the oil and water.

After the separation of the oil and water, the on-off valve 19 of the regenerated oil discharge port 15 is opened, and the regenerated oil is discharged out of the treatment tank 11. The removed reconstituted cooking oil was slightly pale but nearly colorless and transparent because the fried scum and the like were removed, and almost all of the unpleasant odors before the treatment disappeared, and could be used as a new cooking oil. . In the case of conventional untreated edible oil, it deteriorates after 3 to 4 uses at most and cannot withstand use. However, when processed by the edible oil regeneration method or apparatus according to the embodiment of the present invention, Indeed, no deterioration is observed even after repeated use for one week or more, and it has been confirmed that the food material is extremely delicious.

After the regenerated oil is discharged out of the treatment tank 11, the on-off valve 19 of the treated water discharge port 17 is opened to discharge the treated water out of the treatment tank 11. Since the oil after the treatment is completely separated from the oil, the water can be treated according to the usual wastewater treatment. By the above operation, the edible oil is sufficiently regenerated, but the regenerated oil can be further passed through a filter, and deodorized, decolorized, dehydrated, and the like to obtain a more complete regenerated oil. In particular, the oil immediately after the separation of the oil and water in the above step is emulsified because a small amount of water is mixed therein. However, the oil is dehydrated and clarified by heating with the passage of time or when reused. Alternatively, dehydration is possible by reducing the pressure, adding a drying agent, or the like. Decolorization can be performed by blowing heated steam under vacuum by desorbing acid clay. In addition, since the regenerated oil is free from fried scum and the like, even if it passes through a microfilter, clogging of the filter does not occur, and processing can be performed in a short time.

[0029]

The method and apparatus for regenerating edible oil according to the present invention are constructed as described above, and the used edible oil is regenerated by a simple apparatus in a short time to reduce waste oil. Since the amount of waste disposal can be reduced, it contributes to environmental protection by preventing river pollution and contributes to cost reduction, and at the same time, has an excellent effect of providing hygienic and delicious foodstuffs.

[Brief description of the drawings]

FIG. 1A is a plan view illustrating a reproducing apparatus according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of the reproducing apparatus of FIG. It is.

FIG. 2 is a side view illustrating the playback device according to the embodiment of the present invention;

FIG. 3 (a) is a view showing Y of the filtering means illustrated in FIG. 2 (a).
FIG. 3 is a cross-sectional view taken along the line Y, and FIG. 2B is a front view illustrating the playback device according to the embodiment of the present invention.

FIG. 4A is a cross-sectional view illustrating a flow state of oil water when a water stoppage plate is not attached to a reclaimed oil discharge port, and FIG. It is sectional drawing which illustrated the flow state of the oil water in the case, (c) is the top view which illustrated the flow state of the oil water at the time of attaching a water stoppage plate.

FIG. 5 is a side view illustrating a state in which the reproducing apparatus according to the embodiment of the present invention is placed below a fryer;

[Explanation of symbols]

1: regenerator, O: edible oil, W: water, WOS: interface, 1
1: processing tank, 12: stirring means, 12A: rotating shaft, 12
B: blade, 12C: stirring section, 12D: motor, 1
3: filtration means, 13A: wire mesh, 13B: support rod, 13
C: support rod receiving groove, 14: water level adjusting drain port, 15: recycled oil outlet, 16: water stop plate, 17: treated water outlet, 1
8: Wheel for movement, 19: On-off valve, 20: Water inlet, 21:
Lid, 22: bottom, 23: fryer, 24: used oil outlet

Claims (5)

[Claims] 1. A method for regenerating used edible oil, comprising: supplying a predetermined amount of water into a treatment tank in advance;
A step of gradually supplying the used cooking oil heated to the water surface of the treatment tank, and a step of mixing the used cooking oil and water by stirring them after a predetermined amount of used cooking oil is supplied, A step of separating the edible oil and water in a state where the stirring is stopped, a step of discharging the edible oil separated and regenerated by the above step to the outside of the processing tank, and a step of discharging the separated water to the outside of the processing tank. A method for regenerating edible oil, comprising: 2. The method for regenerating an edible oil according to claim 1, wherein the temperature of the edible oil when the used edible oil is poured into water in a treatment tank is 100 to 220 ° C. 3. The edible product according to claim 1, wherein the ratio of used edible oil and water to be processed in the processing tank is within a range of 3: 7 to 7: 3 by volume ratio. How to regenerate oil. 4. An apparatus for regenerating used edible oil, a treatment tank for storing water and edible oil, a water supply means for supplying water to the treatment tank, and an oil supply for supplying used edible oil to the treatment tank. Means, filtration means for removing contaminants such as fried scum in used edible oil, water level adjusting means provided at a position corresponding to the water storage surface of the treatment tank, and equivalent to the water level adjusting means or the water storage surface Opening / closing regenerative oil discharging means provided slightly upward from the position to be opened, openable / closable draining means provided at a lower portion of the treatment tank, and stirring means for mixing used cooking oil and water. An edible oil regenerating device, comprising: 5. The edible oil regenerating apparatus according to claim 1, further comprising a water stopping means provided at least at a lower portion of the regenerated oil discharging means for preventing outflow of water when discharging the regenerated oil. The edible oil regenerating device according to claim 4, characterized in that: