JPH06343882A - Method and apparatus for production of refined rice - Google Patents

Abstract

PURPOSE:To enable long-term preservation without deteriorating the quality of rice and to eliminate the need for a water washing operation in general hot by mixing defatted bran and polishing material with milled rice, polishing the milled rice and separating away the defatted bran, polishing material and fine powder from the milled rice. CONSTITUTION:The defatted bran, milled rice and polishing material carried into a rotary drum 20c by rotation of a carrying-in screw 17b are rotationally polished by rotation of the rotary drum 20c and simultaneously the defatted bran intrudes between the rice grains so that the fat and oil components of the milled rice are properly removed. The defatted bran, milled rice and polishing material in the rotary drum 20c are then carried out by rotation of a carrying out screw 25d and are dropped onto a sieve 33e from the outlet of the rotary drum 20c. The polishing material is separated and screened at this time. The remaining milled rice and defatted bran are sent into a removing device 37 where the milled rice and defatted bran receive the air jetted from an jet nozzle 38e during the transportation on a belt conveyor 41e. The defatted bran is discharged together with the fine powder of the milled rice from a suction opening 45e by a suction pipe 36e. The refined rice is carried out by a belt conveyor 42e.

Description

Detailed Description of the Invention

[0001]

INDUSTRIAL APPLICABILITY The present invention makes it possible to store rice for a long period of time without causing deterioration of the rice, eliminates the need for washing with ordinary households, and is environmentally friendly (that is, river pollution is reduced). The present invention relates to a method and an apparatus for producing refined rice capable of distributing rice to the general market without any problems.

[0002]

2. Description of the Related Art At present, rice is generally provided to consumers in the state of milled rice that has just been processed by polishing. In the state of this polished rice, firstly, there is a problem that it is difficult to store the polished rice for a long period of time. That is, if stored for a long period after pearling, there is a problem that the oil content contained in the rice is oxidized and the taste is deteriorated to make it unusable. Secondly, before the consumer cooks rice, the polished rice is washed with water, but the bran adhering to the rice is discarded together with the drainage, and the sewage becomes high-enrichment water.
There is a problem that rivers are polluted and contribute to pollution problems. Thirdly, it is complicated for the consumer to wash the polished rice with water before cooking rice, and nowadays, the washing work of the polished rice is attempted to be simplified as much as possible in a general household. There is a request to eliminate it if possible.

[0003]

In order to solve such a problem, for example, in order to solve the problem of long-term storage, a packaging means such as carbon dioxide sealed packaging, vacuum packaging, oxygen absorbent sealed packaging is used. There is. In such packaging means,
It is possible to prevent the deterioration and deterioration of rice during storage to some extent. However, there was no solution to the problem of pollution caused by washing the polished rice with water, and the request for eliminating the need for washing with ordinary households.

As described above, at present, rice can be stored for a long period of time without causing deterioration of the rice, washing work in a general household is unnecessary, and it is environmentally friendly (that is, river pollution is reduced). It is desired to distribute rice to the general market (without problems), but there is no means to satisfy all of these requirements, and there is a long-awaited realization of such means.

The object of the present invention was made in view of the above-mentioned circumstances, and the rice can be stored for a long period of time without causing deterioration of the rice, and the washing work in a general household becomes unnecessary. Another object of the present invention is to provide a method and an apparatus for producing refined rice that is environmentally friendly and that can distribute the rice to the general market.

[0006]

To achieve this object, the method for producing refined rice according to the present invention comprises a step of polishing rice by mixing defatted rice bran and an abrasive with the defatted rice bran and the abrasive, and removing the defatted rice bran and the abrasive from the rice. The method is characterized by including a step of separating and removing and a step of removing fine powder adhering to rice polishing.

Further, the refined rice producing apparatus according to the present invention comprises a mixed rice polishing means for polishing rice by mixing defatted rice bran and an abrasive material with the polished rice; And a removing means for removing fine powder.

[0008]

[Function] As described above, since the defatted bran and the abrasive are mixed with the polished rice to polish the polished rice, the oil content of the polished rice is removed by the defatted bran and the abrasive is collided with the polished rice to remove the polished rice bran. Then, the fine powder existing in the ditch of milled rice is removed, and as a result, refined rice is obtained.

The surface of the refined rice thus obtained is
The bran, oil and fines were almost completely removed. Therefore, firstly, since the oil content is particularly removed, the refined rice is not oxidized during storage and its quality is not deteriorated, and long-term storage is possible. Secondly, since the refined rice has the same amount of bran and fine powder removed as it is washed with water before cooking rice, it is not necessary to wash the refined rice with water before cooking rice in a general household. Thirdly, since the washing with water is not necessary, the bran is not discarded together with the drainage, the river is not polluted, there is no pollution problem, and the environment is friendly.

In the present specification, "refined rice" means
It is used as rice, which is almost completely free of bran, oil, and fine powder and does not require washing with water before cooking rice.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method and an apparatus for producing refined rice according to embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a refined rice producing apparatus according to a first embodiment of the present invention. As shown in FIGS. 1 and 2, in the refined rice producing apparatus of the first embodiment, roughly, a polishing machine 1 for polishing brown rice to obtain polished rice and a defatted bran and an abrasive for polishing the polished rice are provided. A hopper 2 for mixing rice, a polishing machine 3 for polishing the polished rice while applying a predetermined pressure to the polished rice, the defatted bran and the abrasive, and a first for removing the defatted bran from the mixed rice, the defatted bran and the abrasive. A removing machine 4 and a second removing machine 5 for removing fine powder of the rice by rubbing an abrasive with the rice.
A third remover 6 is provided for removing the abrasive from the mixed rice and the abrasive to separate and obtain the refined rice.

First of all, the illustrated Luh Seiki 1 is an octagonal (square) type.
Although it is a friction type polishing machine, the polishing machine of the present invention is not limited to this, and various known polishing machines may be used. In the illustrated Luo Seiki 1, above the rectangular tube body 11,
A brown rice hopper 12 for introducing brown rice is provided. Inside the rectangular tubular body 11, it extends in the axial direction and is rotationally driven by a motor (driving source) not shown.
A drive shaft 13, which is also common as a drive shaft of the polishing machine 3, is rotatably provided. A feed roll 14 for feeding the brown rice to the left in FIG. 1 is fixed to the drive shaft 13 located below the brown rice hopper 12.
A Seisei roll 15 is provided on the left side of. Two to three parallel ridges 16 extend on the outer peripheral surface of the polishing roll 15. A resistor 17 is provided near the outlet of the polishing machine 1 for applying a predetermined pressure to the polished rice. A weight (not shown) is mechanically connected to the resistor 17, and when the weight of the weight is changed, the pressure applied to the brown rice by the resistor 17 is adjusted, whereby the bran removed from the brown rice is adjusted. Is configured to be adjusted.

The square tube body 11 has a two-layer structure in the middle portion thereof, the inner square tube 11a is provided with a mesh (or swing), and the outer square tube 11b is provided with refined rice production. A suction pipe 18a extending from a dust collector 18 provided below the device is connected. Furthermore, this outer corner cylinder 11
An air port 19 for taking in air is also provided in b.

With this construction, when brown rice is put into the brown rice hopper 12 and the drive shaft 13 is rotated, the brown rice is fed to the left by the feed rolls 14,
By the action of the parallel ridges 16 between the milling roll 15 and the inner corner cylinder 11a, the bran is rubbed and the bran is removed from the brown rice. At this time, the weight of the weight is adjusted so that the pressure applied to the brown rice by the resistor 17 becomes a predetermined value. The bran removed in this manner is guided from the inner square cylinder 11a of the mesh (or shake) between the inner square cylinder 11a and the outer square cylinder 11b, and is sucked into the dust collector 18 through the suction pipe 18a.

A delivery path 20 is provided between the polishing machine 1 and the polishing machine 3 in the next step, and the polished rice polished from brown rice is sent to the polishing machine 3 through the delivery path 20. .

In this polishing machine 3, the hopper 2 is arranged in the upper part near the entrance thereof. This hopper 2
It comprises an abrasive material charging section 2a for charging an abrasive material and a degreasing bran charging section 2b for charging a degreasing bran. The abrasive is, for example, a granular material of ceramics and has a diameter larger than that of milled rice or smaller than the diameter of milled rice. The defatted bran is obtained by, for example, immersing normal bran in normal hexane to remove oil. The abrasive material and the degreasing bran are mixed from the abrasive material introducing section 2a and the degreasing bran introducing section 2b and introduced into the vicinity of the inlet of the polishing machine 3.

The polishing machine 3 has a drive shaft 1 common to the polishing machine 1.
3 is provided with a screw 20 for mixing and sending the polished rice, the abrasive and the degreasing bran. Furthermore, the drive shaft 13
Is provided with a plurality of stirring bars 21 that are inclined. The square cylinders 22 on the outside of the stirring rods 21 have a two-layer structure, and the inner square cylinders 22a have meshes (or swings).
Is provided, and the suction pipe 18a extending from the dust collector 18 is connected to the outer corner cylinder 22b. Further, the outside corner tube 22b has an air port 2 for taking in air.
3 is also provided. A resistor 24 is provided near the outlet of the polishing machine 3 to apply a predetermined pressure to the rice polishing, the abrasive and the degreasing bran. The structure of the resistor 24 is the same as that of the resistor 17 of the polishing machine 1.

Since it is constructed in this way, the Hosei Seiki 1
The milled rice thus polished is mixed with the abrasive and degreasing bran by the screw 20, and is agitated and abraded by the agitating rod 21 while a predetermined pressure is applied by the resistor 24. By this polishing, the defatted bran removes and absorbs the oil content of the polished rice, and at the same time, the polishing material collides with the polished rice to remove the polished rice bran.

[0020] The polished rice and the degreasing bran, which have been devoid of bran and oil in this manner, are used in the polishing machine 3 and in the first step of the next step.
Through the sending pipe 25 provided between the removing machine 4 and the first
It is sent to the remover 4.

The first removing machine 4 is provided with a drive shaft 26 that is driven to rotate by a motor (driving source) not shown and is common to the second removing machine 5. The drive shaft 26 is provided with a feed roll 27, and is further provided with a plurality of obliquely inclined stirring bars 28. Further, the square tubular body 29 of this also has a two-layer structure, the inner square tubular 29a is provided with a mesh (or swing), and the outer square tubular 29b is provided with
A suction pipe 18b extending from the dust collector 18 is connected. Further, a resistor 30 for applying a predetermined pressure to rice milling or the like is provided near the outlet. The resistor 30 is also similar to the resistor 17 of the Waiki Seiki 1.

Since it is constructed in this way, the sending pipe 2
The milled rice, the abrasive and the degreased rice bran guided via 5 are sent to the right side in FIG.
The mixture is agitated by the agitation rod 28 while being applied with a predetermined pressure. By this agitation, the degreased rice bran that has absorbed the oil is guided between the inner corner cylinder 29a and the outer corner cylinder 29b through the mesh (or shake) of the inner corner cylinder 29a, and sucked into the dust collector 18 through the suction tube 18b. To be done.

The polished rice and the abrasive material from which the degreased bran has been removed in this way are passed through the delivery path 31 provided between the first removing machine 4 and the second removing machine 5 in the next step to the second removing machine. It is sent to the remover 5.

In the second removing machine 5, the drive shaft 26 common to the first removing machine 4 is provided with a screw 32 and a plurality of inclined stirring rods 33. Furthermore, near the exit,
A resistor 34 having the same structure as the resistor 17 of the polishing machine 1 is provided. The rectangular tubular body 35 of this also has a two-layer structure,
The inner square cylinder 35a is provided with a mesh (or swing), and the outer square cylinder 35b is connected to a suction pipe 18b extending from the dust collector 18.

Since it is configured in this way, the sending path 3
The milled rice guided through 1 and the abrasive are screw 3
2 is sent to the right in FIG. 1, and is agitated by the agitating rod 33 while being applied with a predetermined pressure by the resistor 34. By this stirring, the abrasive is mixed and rubbed with the rice polishing,
Fine powder existing in the ditch of milled rice is removed to produce refined rice. The removed fine powder is introduced between the inner square cylinder 35a and the outer square cylinder 35b through the mesh (or swing) of the inner square cylinder 35a, and is sucked into the dust collector 18 through the suction pipe 18b.

[0026] Polished rice from which fine powder has been removed in this manner,
The abrasive is sent to the third remover 6 via a delivery pipe 36 provided between the second remover 5 and the third remover 6 in the next step.

The third removing machine 6 has a two-stage structure,
The refined rice and the abrasive are separated. The third removing machine 6 is provided with a common drive shaft 37 in the first and second stages. In the first stage on the right side of FIG.
A screw 38 is provided at the first stage, and a resistor 39 having the same configuration as the resistor 17 of the polishing machine 1 is provided at the outlet of the first stage. In the second stage on the left side of FIG. 1, the drive shaft 37
Similarly, a screw 40 is provided, and a resistor 41 is similarly provided at the outlet of the second stage. The upper side of each of the first-stage and second-stage square cylinders 42 has a two-layer structure. The inner square cylinder 42a is provided with a mesh, and the outer square cylinder 42b extends from the dust collector 18. The suction pipe 18b is connected. Further, a mesh (or swing) having a predetermined diameter is provided on the lower side of the first-stage and second-stage square cylinders 42, and a receiving member 43 for receiving the abrasive is provided below the mesh. It is provided. On the other hand, a guide tube 44 for guiding the refined rice from the outside of the resistor 41 is provided at the outlet of the second stage. These receiving members 43
And below the guide tube 44, an abrasive container 45 for containing an abrasive and a refined rice container 4 for containing refined rice, respectively.
6 is provided.

Because of the above-mentioned structure, the refined rice from which the fine powder has been removed by the second removing machine 5 and the abrasive are put into the third removing machine 6 through the delivery pipe 36, and in the first stage, While being sent to the left in FIG. 1 by the screw 38,
Only the abrasive is dropped on the lower receiving member 43 by the mesh (or swing) having a predetermined diameter on the lower side of the rectangular tubular body 42. Also in the second stage, similarly, only the abrasive is dropped to the lower receiving member 43 through the mesh (or swing) of the rectangular tubular body 42 while being fed to the left side in FIG. 1 by the screw 40. At this time, fine powder and the like may be removed from the refined rice, and these fine powder and the like are sucked into the dust collector 18 through the mesh of the inner corner cylinder 42a and the suction pipe 18b. Only the refined rice from which the abrasive has been removed and separated in this manner is accommodated in the refined rice container 46 via the guide tube 44.

The third removing machine 6 shown in the figure is a case where the diameter of the abrasive is smaller than the diameter of the refined rice.
Therefore, the abrasive material is shaken off by the mesh (or shake) of the rectangular tubular body 42. However, if the diameter of the abrasive is larger than the diameter of the refined rice, the refined rice may be shaken off first due to the mesh (or shake) of the rectangular tube 42. .

From the above, the refined rice produced in this manner is almost completely free of bran, oil and fine powder.
Therefore, firstly, especially since the oil has been removed,
During storage, refined rice is not oxidized and its quality does not deteriorate, enabling long-term storage. Secondly, since the refined rice has the same amount of bran and fine powder removed as it is washed with water before cooking rice, it is not necessary to wash the refined rice with water before cooking rice in a general household. Thirdly, since washing with water is unnecessary,
The bran is not thrown away with drainage, the river is not polluted, and there is no pollution problem.

Next, referring to FIGS. 3 and 4, the first embodiment of the present invention will be described.
A method and apparatus for producing refined rice according to a modified example of the embodiment will be described.

In the apparatus of this modification, the drive shaft of the sugar refiner 1 is not directly connected to the drive shaft of the polishing machine 3, and the polishing machine 3 is operated in two steps only. Is different from However, it is the same as the first embodiment in that the polishing machine 1, the polishing machine 3, the first removing machine 4, the second removing machine 5, and the third removing machine 6 are housed in one housing. .

The sugar refiner 1 shown in FIG. 3 is substantially the same as that of the first embodiment, except that the drive shaft 51 of the sugar refiner 1 is dedicated to the sugar mill 1. This Waiki Seiki 1
A guide tube 52 for guiding the refined rice milled is provided between and the polishing machine 3 provided below the polishing machine. The lower end of the guide tube 52 is connected to the hopper 2 composed of an abrasive material charging section 2a and a degreasing bran charging section 2b.

The polishing machine 3 is composed of two stages,
The common drive shaft 53 is provided with the feed roll 54 and the stirring rod 55 in the first stage, and the screw 56 in the second stage.
And a stirring rod 57 is provided. Other configurations such as the resistor and suction by the dust collector 18 are the same as those in the first embodiment. Therefore, the rice milled by the polishing machine 1 is
In the first stage, it is mixed with an abrasive and degreasing bran, and is agitated by a stirring rod 54 while being applied with a predetermined pressure to be abraded. Also in the second stage, the polished rice is mixed with the abrasive and the degreasing bran by the screw 56 and the stirring rod 57, stirred, and polished. By such two-step polishing,
The defatted bran removes and absorbs the oil content of the polished rice, and at the same time, the polishing material collides with the polished rice to remove the polished rice bran.

In addition, the configurations of the first removing machine 4, the second removing machine 5, the third removing machine 6, the refined rice container 46 and the like are the same as those in the first embodiment.

In the first embodiment and the modification, the polishing machine 1, the polishing machine 3, the first removing machine 4, the second removing machine 5 and the third removing machine 6 are housed in one housing. But
The polishing machine 3, the first removing machine 4, the second removing machine 5, and the third removing machine 6 may be housed in one housing, and only the polishing machine 1 may be configured separately from these.

Next, the mixing ratio of the defatted rice bran and the abrasive to the polished rice will be described.

Regarding the mixing ratio, a certain amount of milled rice was successively added with degreasing bran and an abrasive to conduct a turbidity test, and the minimum value of the turbidity curve obtained as a result was obtained. The optimum mixing ratio of the corresponding degreasing bran and the abrasive is set.

More specifically, the smaller the mixing ratio of the defatted bran and the abrasive to the polished rice, the better the removal of bran, oil, etc. from the polished rice, but the smaller the mixing ratio, the smaller the mixing ratio. There is a high probability that the milled rice will collide with each other, and the milled rice often cracks or breaks.

Therefore, the degreasing bran and the abrasive are successively added to a certain amount of milled rice, and the turbidity test is conducted to find the minimum value of the turbidity curve obtained as a result. That is, if the mixing ratio of the defatted bran and the abrasive to the polished rice is increased successively, the removal of the bran, oil and the like from the polished rice will gradually become worse, but the probability of cracking or breaking of the polished rice will decrease.
The minimum value is obtained by finding these harmonic points. Therefore, in the case of the mixing ratio corresponding to this minimum value,
Rice bran, oil, etc. are well removed from the milled rice and cracked into milled rice.
You can get the refined rice without breaking.

Further, the mixing ratio of the defatted bran and the abrasive to the polished rice is increased or decreased according to the quality of the polished rice and the rotation speed of the drive source. This is because the efficiency of removing rice bran, oil, etc. from the milled rice changes depending on the quality of the milled rice and the rotation speed of the drive source.

Next, a method and apparatus for producing refined rice according to the second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 5 and 6, this manufacturing method firstly includes defatted rice bran, polished rice, and an abrasive (the abrasive functions to remove fine powder adhering to the surface of the polished rice, such as stone, ceramics, and resin. ) To the entrance of the polishing machine, secondly a means for loading into the polishing machine, thirdly means for polishing while rotating the polishing machine, fourthly means for carrying out from the polishing machine, Fifth, it consists of defatted rice bran, separation of a rice polishing machine and means for removing fine powder adhering to rice.

Next, the details will be sequentially described.

As the first mixing means, it is necessary to mix degreased rice bran, milled rice and abrasives 1a, 2a, 3a in a fixed ratio. Since each measures a fixed amount, the measuring devices 1a1, 2a1, 3a1 according to the rotational speed of the screw are linked with the motors 1a2, 2a2, 3a2 with an inverter by a chain, although not shown. The above defatted bran, rice milled
The transfer pipe in which the abrasive is continuously measured at a constant rate and enters the transfer pipe 9a is provided with a screw 10a provided on the main spindle 11a at the center and extends to the upper part of the inlet of the octagonal rotary drum 20c. When the degreased rice bran, the milled rice and the abrasive are continuously conveyed by a screw, they pass through the conveying pipe 12a through the dropping hole 7a of the conveying pipe and are fed to the lower portion 8a of the pipe. It should be noted that the supply amount of the degreasing bran, the rice polishing and the polishing material, that is, the supply amount varies depending on the rotation speed of the measuring motors 1a2, 2a2, 3a2. The polishing time can be changed according to the turbidity of the rice to be obtained such as shortening the time.

Secondly, as a means for loading degreasing bran, milled rice and an abrasive into the rotary drum, a loading screw 17b is provided by a gear 14b provided in a loading drive 13b. By the rotation of the screw 17b, the degreasing bran, the rice polishing and the abrasive are continuously carried into the rotary drum. Although not shown, the third polishing machine has a sensor cord inside the drive shaft 13b, and the polishing machine is configured to rotate. Since polishing is performed by rotating a drum, two octagonal rings 21c are evenly wound on the left and right sides. The ring of the rotary drum is sandwiched by a stopper 22c provided on a drive shaft 23c to prevent left and right movement, and at the same time, the drum is rotated by the support of the rotary drum and the feed roller 22c. With this configuration, the feed screw 17 of the carry-in drive unit 13b is
While rotating b, the degreasing bran, the rice polishing, and the abrasive are sequentially fed into the rotary drum 20c. The degreased rice bran, the rice milled, and the abrasive, which have been carried into the rotary drum 20c, are rotary-polished as the rotary drum 20c rotates. At this time, the rotary drum 20c
The rotation speed of, for example, is 25 rpm, and since it rotates relatively slowly, the rice polishing, the degreasing bran, and the abrasive in the rotary drum 20c are rotated and lifted up to a certain extent as indicated by the arrow in FIG. When it is hit, it will slide down diagonally. At this time, the polished rice is polished by the polishing material (downhill polishing distance), and at the same time, the defatted bran enters between the rice grains, and the oil and fat content of the polished rice is appropriately removed.

Fourthly, as a means for carrying out degreasing bran, rice polishing and an abrasive from the rotary drum, a carry-out screw 25d is provided by a gear 26d provided on a carry-out drive shaft 27d. By the rotation of the screw 25d, the degreased rice bran, the polished rice and the abrasive are carried out from the rotary drum. Also in the carry-out screw 25d, the drive shaft 29d and the gear 26d are connected by a chain. It is rotated independently of the rotary drum 20c. An internal sensor 24d for the drive shaft 27d is provided and is configured to control the amounts of degreasing bran, rice polishing, and abrasive. Thus, the rotation of the screw 25d causes the degreased rice bran, the rice milled and the abrasive material in the rotary drum to be carried out and fall from the outlet of the rotary drum.

Fifthly, the milled rice, the degreasing bran, and the abrasive, which are sequentially fed from the rotary drum, fall on the shaker 33e. At this time, the abrasive is separated and sorted. The remaining milled rice and defatted bran are sent to a device 37e for removing defatted bran and fine powder, as shown in FIG. The removing device 37e is provided with a hopper 31e for receiving and discharging the milled rice and defatted bran dropped from the sieving 33e. The milled rice and defatted bran discharged from the hopper 31e are conveyed onto the first belt conveyor 41e. A net 44e is arranged on the first belt conveyor 41e, and the net 44e faces the first belt conveyor 41e.
Are arranged. An injection nozzle 38e for injecting air is provided on the net 44e, a suction device 36e is provided below the first belt conveyor 41e, and a suction opening 45e of the suction device 36e is provided at a first position. It is provided in the belt conveyor 41e. As a result, the milled rice and defatted rice bran conveyed on the first belt conveyor 41e sandwich the milled rice between the upper net 44e and receive the blast air from the blast nozzle 38e. As a result, the degreasing bran is the net 4 of the first belt conveyor 41e.
4e and is discharged from the suction opening 45e by the suction pipe 36e. At this time, fine powder of milled rice is also sucked. In this way, the defatted bran and fine powder are separated, and the refined rice is carried out from the second belt conveyor 42e. An inverter motor 4a is used as a drive source for the transport shaft 11a. The drive shaft 23c of the rotary drum 20c and the transport shaft 1
The drive source for rotating 3b is also the inverter motor 4
It is 3 bc. The drive source for the transport shaft 27b and the separator 37e also uses an inverter motor 40be.

Next, the mixing ratio of the defatted rice bran and the abrasive to the milled rice in the second embodiment will be described.

In this second embodiment, the mixing ratio of the defatted bran, the polished rice and the abrasive is determined by determining the minimum amount of the abrasive which allows a certain amount of the rice to enter between the abrasive grains, and then a certain amount of the polished rice and the abrasive. To determine the maximum amount of defatted bran that enters between these particles, further mix them, and then send them to a rotary drum and perform downhill polishing to perform a turbidity inspection of polished rice The downsliding polishing distance is determined according to the turbidity.

Hereinafter, an experimental example will be described in detail. (1) Determination of Optimum Amount of Abrasive Material (Stone) As shown in FIG. 8, the rotary rice machine has a volume of 7 liters, an octagon, a direct line of 195 mm, and a length of 220 mm. 2 liters of polished rice was put into a rice polishing machine, and abrasives (stones) were successively added and added to observe how much the polished rice entered between the stone grains. In other words, it shows that when the amount of polished rice was 2 liters and the amount of stones was 1 liter, it became full. Considering that bran is also added, it is considered appropriate to use 1 liter of abrasive (stone).

[0051]

[Table 1] (2) Determining the optimum amount of defatted bran Mixing 2 liters of milled rice with 1 liter of abrasive (stone) and increasing the amount of bran between the particles, 0.65
Filled with liters. Considering the difference between the abrasive (stone) and the bran particles, 0.6 liter is considered appropriate.

[0052]

[Table 2] (3) Determining the optimum distance for downsliding polishing The turbidity was measured using Noda Tsushin (Arakawa Ward, Tokyo) by shaking 5 g of polished rice with 200 cc of water for 2 minutes and immediately putting the supernatant in a container. It is a thing.

From the results shown in Table 3, 180 m is considered to be the best.

[0054]

[Table 3] From the results in Table 4, 140m is considered to be the best. It can be seen that the downhill polishing time differs depending on the type of rice polishing.

[0055]

[Table 4] The present invention is not limited to the above-mentioned embodiments, and can be variously modified.

[0056]

As described above, according to the present invention, the surface of the refined rice is almost completely free of bran, oil and fines. Therefore, firstly, since the oil content is particularly removed, the refined rice is not oxidized during storage and its quality is not deteriorated, and long-term storage is possible. Secondly, since the refined rice has the same amount of bran and fine powder removed as it is washed with water before cooking rice, it is not necessary to wash the refined rice with water before cooking rice in a general household. Thirdly, since the washing with water is not necessary, the bran is not discarded together with the drainage, the river is not polluted, there is no pollution problem, and the environment is friendly.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a refined rice producing apparatus according to a first embodiment of the present invention.

FIG. 2 is another sectional view of the refined rice producing apparatus according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a refined rice producing apparatus according to a modified example of the first embodiment of the present invention.

FIG. 4 is another cross-sectional view of the refined rice producing apparatus according to the modification of the first embodiment of the present invention.

FIG. 5 is a schematic sectional view of a refined rice producing apparatus according to a second embodiment of the present invention.

FIG. 6 is a schematic side view of the refined rice producing apparatus shown in FIG.

FIG. 7 is a cross-sectional view of the rotary drum shown in FIGS. 5 and 6.

FIG. 8 is a reference diagram of a rotary drum for determining a mixing ratio of defatted rice bran, milled rice and an abrasive.

[Explanation of symbols]

 1a Degreasing bran 2a Rice milling 3a Abrasive material 1a1 Measuring device 2a1 Measuring device 3a1 Measuring device 17b Carrying screw 20c Octagonal rotary drum 25d Carrying screw 37e Removal device

Claims (8)

[Claims] 1. A method comprising: a step of polishing rice by mixing defatted rice bran and an abrasive material with the polished rice; a step of separating and removing the defatted rice bran and the abrasive material from the polished rice; and a step of removing fine powder adhering to the polished rice. A method for producing refined rice, which comprises: 2. The refined product according to claim 1, wherein the mixed milled rice, defatted bran and abrasive are sequentially fed to a drum and a main shaft is rotated while a predetermined pressure is applied by a resistor at an outlet to polish the rice. Rice production method. 3. Regarding the mixing ratio of the defatted rice bran and the abrasive to the polished rice, the turbidity test obtained by sequentially increasing the amount of the defatted bran and the abrasive to a fixed amount of rice and conducting the turbidity curve obtained as a result 3. The method for producing refined rice according to claim 1, wherein the optimum value is the mixing ratio of the defatted rice bran and the abrasive which corresponds to this minimum value. 4. The refinement according to claim 1, wherein the degreased rice bran, the milled rice and the polishing material are measured in a fixed amount, and each of them is sequentially fed at a fixed ratio to a square drum to polish the polished rice while rotating. Rice production method. 5. The mixing ratio of defatted rice bran, milled rice, and abrasive is determined by determining the minimum amount of the abrasive that allows a certain amount of rice to enter between the abrasive grains, and then mixing a certain amount of the milled rice and the abrasive. Determine the maximum amount of defatted bran that can enter between particles, etc., further mix them, and then send them to a rotating drum and perform downhill polishing to perform turbidity inspection of polished rice, which is suitable for the turbidity of polished rice The method for producing refined rice according to claim 1 or 4, wherein the downhill polishing distance is determined. 6. A mixing and polishing means for mixing polished rice with a defatted bran and an abrasive, and a removing means for separating and removing the defatted bran and the abrasive from the polished rice to remove fine powder adhering to the polished rice. An apparatus for producing refined rice, comprising: 7. The mixing and polishing means comprises means for sequentially feeding the mixed polished rice, defatted bran and abrasive to a drum and applying a predetermined pressure by a resistor at the outlet to polish the rice by rotating the spindle. The refined rice manufacturing apparatus according to claim 6. 8. The polishing means has means for measuring degreasing bran, rice polishing, and an abrasive in a fixed amount and sequentially feeding each of them to a square drum at a constant rate and polishing the rice while rotating. The refined rice manufacturing apparatus according to claim 6.