JP2001131571A - Purifying apparatus for food oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a purifying apparatus for food oil capable of purifying a used oil close to a new oil by sufficiently removing free fatty acids and peroxides and browning materials which are the deterioration product in the used oil and capable of shortening time for purification. SOLUTION: This purifying apparatus for food oil comprises a mixing tank 2 having many holes on sidewall and installing a filter part 4 inside, a motor 14 provided with a clutch mechanism 32 to rotate the tank 2, an outside body 3 to store the tank 2, a circulating pump 5 connected to the outside body 3 to return oil accumulated between the outside body 3 and the tank 2, a filter part 7 connected to the outside body 3 through a valve 6, an oil storage tank 8 to store the purified oil filtrated by the filter part 7 and a pressure reducing device 13 connected to the oil storage tank 8 through a valve 11 to decrease pressure inside the tank 8, and the deterioration oil is purified by agitating and mixing the oil with a purifying agent composition in the mixing tank 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a purified oil obtained by adsorbing free fatty acids, peroxides and browning substances to an edible oil purification composition by stirring and mixing a used deteriorated oil and an edible oil purification composition. The present invention relates to an edible oil purifying apparatus for obtaining edible oil.

[0002]

2. Description of the Related Art In order to purify edible oil and dispose of it, it is easiest to remove degraded oil having a large particle diameter by passing deteriorated oil used for frying through filter paper or wire mesh. It was a general method. However, in such a removing method, the used oil purified by the filter paper has a precipitate of fine particles accumulated at the bottom of the oil during storage, and the removal of the fine particles is insufficient, and the removal of the deteriorating component cannot be expected at all. On the other hand, various apparatuses for purifying used edible oil have been conventionally proposed. For example, JP-A-56-15
No. 646 discloses that a used oil and a purifying agent are mixed, a edible oil purifying composition adsorbs and removes a deteriorating component in the used oil, and is passed through a fine filter by a natural filtration method.
A method for obtaining purified oil is described. Also, Japanese Patent Application Laid-Open
JP-A-226598 describes that a suction filtration method is used. This suction filtration method comprises an outer tank, a middle tank, and an upper tank, a filter is provided at a step of the upper tank, and air in the outer tank is discharged by a pump from an upper hole of the outer tank. Things. In such a configuration, even when using a fine-grained filter that is difficult to permeate so that oil water can be separated, since the inside of the outer tank is depressurized by the pump, filtration is quickly performed without clogging. I can do it.

[0003]

However, in the purifying apparatus described in Japanese Patent Application Laid-Open No. 56-15646, although the filtration is carried out smoothly at the beginning of the filtration, the filtration is promoted by other than the own weight of the oil. It is inevitable that the purifier will block the eyes of the filter over time. Therefore, the time required to filter becomes longer,
Particularly in a cafeteria where a large amount of oil is used, low processing efficiency is a major problem.

Further, in the apparatus utilizing the suction filtration method described in JP-A-60-226598, the filtration time is shortened, but the contact time between the used deteriorated oil and the purifying agent is shortened. For this reason, there is a problem that the cleaning composition for edible oil cannot sufficiently adsorb the deteriorating components in the used oil, resulting in insufficient cleaning.

As described above, in the conventional edible oil purifying apparatus,
There are many points to be improved regarding the length of filtration time and the degree of purification, and the current situation is that it cannot meet the needs of the food service industry such as fast food, family restaurants, and izakayas.

According to the present invention, free fatty acids, peroxides and browning substances, which are deteriorating components in used oil, can be sufficiently adsorbed and removed, and the oil can be purified to a level close to new oil, and the purification time can be reduced. It is an object to provide a simple edible oil purification device.

[0007]

According to the present invention, there is provided an edible oil purifying apparatus comprising: a mixing tank having a plurality of holes formed in a peripheral wall thereof and having a filter portion therein; a motor having a clutch mechanism for rotating the mixing tank; An outer shell for storing the mixing tank, a circulation pump connected to the outer shell and returning oil accumulated between the mixing tank and the outer shell to the mixing tank, and connected to the outer shell via a valve; A filtration filter unit, an oil storage tank for storing the purified oil filtered by the filtration filter unit, and a pressure reducing device for reducing the pressure inside the oil storage tank connected to the oil storage tank via a valve, I do.

In such a configuration, the deteriorated oil in the edible oil purifying apparatus and the edible oil purifying composition are mixed and agitated, and the deteriorated oil exuded from a plurality of holes is returned to the mixing tank by the circulation pump.
The deteriorated oil is always mixed, and the deteriorated components in the deteriorated oil can be adsorbed and removed. Further, due to the pressure difference between the atmospheric pressure and the reduced pressure created by the pressure reducing device, the purified oil from the mixing tank is sent to the filter section, and the sent purified oil is further filtered and purified by the filter. Furthermore, since the mixing tank rotates at high speed to remove the oil soaked in the edible oil purification composition, the filtration is completed in a short time, the edible oil purification composition can be used again, and the yield can be increased. .

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention according to claim 1 is a mixing tank having a plurality of holes formed in a peripheral wall and having a filter part therein, a motor with a clutch mechanism for rotating the mixing tank, and the mixing tank. A circulating pump connected to the outer shell for returning oil collected between the mixing tank and the outer shell to the mixing tank; and a filtration filter connected to the outer shell via a valve. An edible tank for storing purified oil filtered by the filtration filter unit, and a decompression device for reducing the pressure inside the oil storage tank connected to the oil storage tank via a valve. It is an oil purification device, which has the effect that filtration can be completed in a short time, the edible oil purification composition can be used again, and the yield can be increased.

[0010] According to a second aspect of the present invention, the filter provided in the mixing tank has a double structure including a filter that does not allow the edible oil purification composition to pass therethrough and a mounting jig having a plurality of holes in a peripheral wall. The edible oil purifying device according to claim 1, wherein the filter is configured to be detachable from the mounting jig, and has an effect that a filter can be easily replaced and a high filtration efficiency can be maintained.

According to a third aspect of the present invention, a heat retaining means is provided between the outer shell and the pressure reducing device for setting the internal temperature of the mixing tank so as to reduce the viscosity of the oil to be purified. 3. The edible oil purifying apparatus according to claim 1 or 2, wherein the viscosity of the deteriorated oil which has been excessively cooled is increased, whereby the viscosity is reduced to facilitate filtration and the filtration time can be reduced. Have.

According to a fourth aspect of the present invention, a vibration absorbing spring for absorbing vibration during rotation of the mixing tank is disposed between the mixing tank and the outer shell. 3. The edible oil purifying apparatus according to any one of the items 3, wherein the edible oil purifying apparatus has an effect of absorbing vibration of the mixing tank during high-speed rotation and quickly stopping the mixing tank even after high-speed rotation. Also, when the mixing tank is rotated at a high speed, the oil on the surface of the edible oil purification composition is removed by centrifugal force,
The purifying agent can be reused.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of an edible oil purifying apparatus according to an embodiment of the present invention.

As shown in the figure, an edible oil purifying apparatus 1 has a mixing tank 2 having a large number of holes in a peripheral wall and a filter section 4 along the inner periphery thereof, and a motor 14 for rotating the mixing tank 2.
An outer shell 3 for accommodating the mixing tank 2, a circulation pump 5 connected to the outer shell 3 and returning oil accumulated between the mixing tank 2 and the outer shell 3 to the mixing tank 2, and a valve for the outer shell 3. 6, a filter unit 7 for storing filtered purified oil, and a pressure reducing device 13 connected to the oil storage tank 8 via a valve 11 to reduce the pressure in the system. ing. In addition, valve 1
A heater 12 is disposed as a heat retaining means in a pipe section between the pressure reducing device 1 and the pressure reducing device 13.

FIG. 2 is an exploded perspective view of the mixing tank 2 and the filter section 4. The filter section 4 is housed in the mixing tank 2 so as to be exchangeable. The mixing tank 2 is in the form of a container formed by a punching metal 24 having a handle 23 attached to the upper end, and has many holes opened all around and on the bottom surface. And
A boss 25 is provided at the bottom of the mixing tank 2 for connection to the output shaft of the motor 14. The filter section 4 is formed of a nonwoven fabric 22 having a flange-shaped edge 21 for hooking on the upper edge of the mixing tank 2.

FIG. 3 is a longitudinal sectional view showing a main part of a connection structure between the motor 14 and the mixing tank 2.

In FIG. 3, a clutch 32 is connected to an output shaft of the motor 14 via a belt 14a. A boss portion of the mixing tank 2 is provided in a bore 36 provided at an upper end of a rotating shaft 32a protruding upward from the clutch 32. 25 are fitted. A disk-shaped auxiliary plate 32 is provided around the rotation shaft 32a.
b is provided so as to rotate integrally with the rotating shaft 32a.
The hooks 31 are arranged on the outer peripheral edge of the auxiliary plate 32b, and the hooks 35 are also provided on the bottom surface of the mixing tank 2 located directly above the hooks 31.
35 are connected by a tensile vibration absorbing spring 9. The hooks 31 and 35 are arranged at an angular pitch of 90 ° around the rotation axis 32a, and the mixing tank 2 is supported at four points by the vibration absorbing spring 9 with respect to the auxiliary plate 32b.

In the above configuration, the deteriorated oil and the edible oil purifying composition are put into the mixing tank 2 having a large number of holes in the peripheral wall at a predetermined ratio, and the motor 14 including the clutch 32 in the drive system is used for the operation. Purification is performed by mixing and stirring at a low speed for a predetermined time. The purified oil is filtered by the filter unit 4 inside the mixing tank 2 and accumulates between the outer shell 3 and the mixing tank 2. The accumulated oil is returned to the mixing tank by the circulation pump 5. By taking such steps, the edible oil purifying composition adsorbs and removes free fatty acids, peroxides and browning substances, which are deteriorating components in degraded oil. Thereafter, the valve 6 is opened, the pressure reducing device 13 is operated, the opening degree of the valve 11 is adjusted, and the internal pressure of the oil storage tank 8 is reduced.
The inside of the oil storage tank 8 has a negative pressure, and a pressure difference is generated between the oil storage tank 8 and the mixing tank 2 which is open to the atmosphere and has a body pressure. Due to this pressure difference, the purified oil passes through the filter unit 7, filters out the fine edible oil purification composition in the purified oil, and is guided to the oil storage tank 8. Thereafter, the clutch 32 connected to the motor 14
And the high-speed rotation, the oil accumulated on the surface and pores of the edible oil purification composition passes through the filter unit 7 and is guided to the oil storage tank 8. Most of the edible oil purification composition is filtered off by the filter unit 14 and
Remains and will be used again.

Here, a heater 12, which is a heat retaining means, is installed in a pipe section between the valve 11 and the pressure reducing device 13.
Therefore, when the temperature of the degraded oil is decreasing, the motor 14 of the pressure reducing device 13 rotates in the reverse direction to be in a blowing state, and the air heated by the heater 12 is sent out. When the temperature of the degraded oil is high, the motor 14 of the pressure reducing device 13 rotates forward to draw air, and functions to lower the temperature to a predetermined temperature. By such a temperature operation, the temperature of the deteriorated oil that has been excessively cooled can be increased to lower the viscosity, and the filtration can be performed more efficiently due to its fluidity.

Further, the mixing tank 2 is driven by a vibration absorbing spring 9 to form an auxiliary plate 32b which rotates integrally with the rotating shaft 32a.
When the mixing tank 2 is stopped after being rotated at a high speed, the mixing tank 2 can be stopped quickly by buffering the rotation of the mixing tank 2 due to inertia.

As described above, according to the present invention, the purified oil is
The free fatty acids peculiar to the deteriorated oil are reduced, the brown color becomes yellow close to white, the odor is removed, and the purification is completely performed. Further, since the filter section 4 attached to the mixing tank 2 can be replaced as soon as a predetermined time comes, it can be optimally used in a family restaurant using a large amount of edible oil and other food processing fields. In addition, when the mixing tank 2 is rotated at a high speed, the oil present on the surface of the edible oil purifying composition is removed by its centrifugal force, so that the edible oil purifying composition can be used again, which saves time and economic effects. Rises. In addition, the use of the edible oil purifier of the present invention enables the reuse of degraded oil, which has been requested of a waste oil supplier, and is therefore an environmental measure.

[0023]

According to the first aspect of the present invention, since the deteriorated oil is circulated and purified by the circulating pump, the purifying composition can sufficiently remove free fatty acids, peroxides and browning substances which are deteriorated components in the deteriorated oil. It can be adsorbed and the degraded oil can be purified until it is close to new oil. Further, the synergistic effect of the centrifugal separation by the rotation of the mixing tank and the suction filtration to the oil storage tank can shorten the filtration time, and the purification composition remaining in the mixing tank is captured by the filter portion and remains, so that continuous use is possible. It is possible.

According to the second aspect of the present invention, since the filter and the mixing tank have a double structure, and the filter inside the mixing tank is detachable, the replacement operation is simplified.

According to the third aspect of the present invention, the viscosity of the deteriorated oil can be reduced by heating with the heat retaining means between the outer shell and the pressure reducing device, so that the purification and the filtration can be performed more efficiently. You can save time.

According to the fourth aspect of the present invention, since the vibration absorbing spring is provided between the mixing tank and the outer shell, the start-up operation when the mixing tank is rotated at a high speed for purification and the stop operation after the purification are performed. Can be performed promptly, and the durability of the member can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an edible oil purification device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a mixing tank and a filter section.

FIG. 3 is a longitudinal sectional view showing a main part of a connection structure between a motor and a mixing tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Edible oil purification apparatus 2 Mixing tank 3 Outer body 4 Filter part 5 Circulation pump 6 Valve 7 Filtration filter part 8 Oil storage tank 9 Vibration absorption spring 11 Valve 12 Heater 13 Decompression device 14 Motor 14a Belt 21 Edge 22 Nonwoven fabric 23 Pattern 24 Punching metal 25 Boss part 31 Hook 32 Clutch 32a Rotary shaft 32b Auxiliary plate 34 Plate 35 Hook 36 Bore

Claims (4)

[Claims] 1. A mixing tank having a plurality of holes formed in a peripheral wall thereof and having a filter section therein, a motor with a clutch mechanism for rotating the mixing tank, an outer shell for housing the mixing tank, and an outer shell. A circulating pump connected to return the oil accumulated between the mixing tank and the outer shell to the mixing tank, a filtration filter unit connected to the outer shell via a valve, and filtered by the filtration filter unit An edible oil purifying device comprising: an oil storage tank for storing purified oil; and a decompression device connected to the oil storage tank via a valve to reduce the pressure inside the oil storage tank. 2. The filter section provided inside the mixing tank has a double structure of a filter that does not allow the edible oil purification composition to pass therethrough and a mounting jig having a plurality of holes in a peripheral wall. The edible oil purification device according to claim 1, wherein the edible oil purification device is detachable from the mounting jig. 3. A heat retaining means provided between the outer shell and the pressure reducing device for setting an internal temperature of the mixing tank so as to lower the viscosity of oil to be purified. Item 3. An edible oil purifying apparatus according to item 1 or 2. 4. The method according to claim 1, wherein a vibration absorbing spring for absorbing vibration during rotation of the mixing tank is disposed between the mixing tank and the outer shell. Edible oil purification equipment.