JP2021062333A - Rice finishing device, rice polishing tank, rice polishing device, and manufacturing method of clean rice - Google Patents

Abstract

To develop a device capable of improving cleanliness of clean rice.SOLUTION: A rice polishing device includes a rice polishing system device, a rice milling supply system device, a defatted bran supply system device and a clean rice finishing system device. The rice polishing device includes a rice polishing tank with a pressurization part as the rice polishing system device, and includes a free fine powder removal device having an air carrier cylinder with a dust collector, and an adhering fine powder removal device having a water mist supply device on the lower side and a dust collector of the upper side, in the clean rice finishing system.SELECTED DRAWING: Figure 1

Description

The present invention relates to an apparatus using milled rice as a raw material and further polishing the rice. The present invention relates to a technique for producing clean rice (sometimes referred to as "polished rice") or non-washed rice by a dry method by polishing rice without using water.

Viscous nuka (also called "starch" or "skin bran") that cannot be removed by a rice mill remains on the surface of the polished white rice. By scrubbing the rice, the nuka on the surface of the rice is washed off and the rice becomes delicious. Wash-free rice eliminates the need to wash the rice. Non-washed rice is hygienic (clean) rice that does not need to be washed. You can take the rice out of the bag, pour water on it, and cook the rice right away.
As a method for producing non-washed rice, there are a wet method in which the rice bran is removed from the surface of the rice using water and dried, and a dry method in which the rice bran is removed using a rice polishing material without using water. The so-called wet method of washing rice by rubbing the polished rice in water without using a rice polishing material and polishing the rice with water has become the mainstream of the current manufacturing method of non-washed rice. However, the drawbacks of this method are problems such as deterioration of taste and deterioration of polished rice, but it should be noted that mold and the like are generated.
The applicant has proposed an invention relating to a method and apparatus for producing wash-free rice by a dry method. That is, Patent No. 2958885 "Clean rice manufacturing apparatus and manufacturing method" (Patent Document 1), Patent No. 4451006 "Clean rice manufacturing apparatus and manufacturing method using defatted rice bran" (Patent Document 2), and Patent. No. 4153844, "Rice polishing method, rice polishing apparatus, rice polishing material, washing-free rice manufacturing method and washing-free rice manufacturing apparatus" (Patent Document 3).
These inventions focus on defatted bran as a rice polishing material and try to remove the nuka remaining in the rice milling. This is a method in which a rotating body is attached to a rotating shaft and the rice is agitated and polished in order to bring the nuka remaining on the surface of the rice into contact with the defatted bran by mixing and stirring the milled rice and the polished rice material. In this rice polishing technology, the rice polishing material rotates as a unit while intervening between the polished rice, and it takes a long time to polish the rice to the extent that the turbidity of the polished rice is sufficiently reduced. There was room for improvement, such as.

In Patent Document 1, defatted rice bran and a nut-shaped pressurizing material are blended with raw rice milling, and these blends are put into a rotating drum and subjected to rotary stirring treatment to obtain clean rice, a pressurizing material, and a cleaning material. It is an invention to produce clean rice which is non-washed rice by sorting and removing fine powder adhering to rice grains.
Patent Document 2 is an invention that is an improvement of the invention proposed in Patent Document 1, and is a manufacturing apparatus for producing clean rice by blending treated rice and defatted rice without using a pressurizing material. It is an improvement on the means and device configuration.
Patent Document 3 is an improved invention of the invention proposed in Patent Document 1, in which rice grains and defatted bran are supplied to the distance between two objects while relatively moving between two objects arranged at intervals. This is an invention for friction-polishing rice grains.

Since the defatted bran is defatted, it easily adsorbs the lipid-containing nuka on the surface of the milled rice, has a hardness that does not damage the rice even if it is rubbed strongly, and adjusts the water content to the same level as the rice. It is easy to mix with rice and can prevent dry cracking without drying, it is a safe material because it is a natural material obtained from rice, and it can be obtained in large quantities at low cost, so it is familiar with rice. Therefore, it is an original rice polishing material that the present inventor has been paying attention to. What is familiar with rice is that it adheres to the surface of rice and, on the contrary, is hard to fall off. The present inventor has developed a method and an apparatus for efficiently contacting and rubbing the defatted bran and the milled rice to attach and remove the starch remaining in the milled rice to the defatted bran. Patent Document 4 proposes a means and an apparatus for pressing the defatted bran against the surface of rice, and Patent Documents 4 and 5 propose that the used defatted bran is recycled.
In Patent Document 4 (Japanese Patent No. 47384427), rice grains and rice polishing material are supplied to the distance between the two objects to grind the rice grains while relatively moving between the two objects arranged at intervals. It is a rice polishing method, which is a rice polishing method or a washing-free rice production method, characterized in that a rice polishing material obtained by removing pregelatinized white starch from a defatted bran is used as the rice polishing material.
Patent Document 5 (Patent No. 5261294) proposes a two-step regeneration device using a primary sieve and a classifier as a means for reusing the polished rice material.

Japanese Patent No. 2958885 Japanese Patent No. 4451006 Japanese Patent No. 4153844 Japanese Patent No. 4738427 Japanese Patent No. 5261294

An object of the present invention is to develop an apparatus for improving the cleanliness of clean rice.

The present invention mainly has the following configuration.
1. 1. A rice finishing device that removes fine powder from milled or polished rice grains.
A transport cylinder that air-conveys rice grains from the bottom to the top, a free fine powder removal device provided with a dust collector at the top of the air transport cylinder, and
A transport cylinder for air-transporting rice grains from the bottom to the top, which is provided in a subsequent process of the free fine powder removing device, a water mist supply device provided below or below the transport cylinder, and an upper portion of the transport cylinder. Adhesive fine powder removal device equipped with a dust collector
Rice finishing device equipped with.
2. 1. The rice grain is a grain of clean rice and is a clean rice finishing device. The described rice finishing device.
3. 3. It is a rice polishing tank in a rice polishing device using defatted bran as a rice polishing material. The rice polishing tank has a pressurizing part on the inlet side and a continuous rice polishing part on the pressurizing part.
The pressurizing part is equipped with a plurality of pressurizing rods inclined to the rotating shaft.
In the rice polishing section, a rice polishing container provided with a resistor extending from the inner wall and a rotating shaft to which a rod-shaped rice polishing rod is attached are provided in the rice polishing container.
A rice polishing tank characterized in that the resistor and the rice polishing rod are arranged so that they can move relative to each other at intervals through which grains can pass.
4. It is a rice polishing device equipped with a rice polishing system device, a rice milling system device, a degreasing bran supply system device, and a clean rice finishing system device.
Equipped with a rice polishing tank equipped with a pressurizing part as a rice polishing device
The rice polishing system is characterized by being equipped with a free fine powder removing device equipped with an air transport cylinder equipped with a dust collector, a water mist supply device on the lower side, and an adhering fine powder removing device equipped with a dust collector on the upper side. apparatus.
5. The rice polishing device has a rice bran sorting sieve installed at the rice bran sorting tank and the discharge port of the rice bran tank, and the degreasing bran supply system device has a degreasing bran recycling device immediately after the rice bran sorting sieve.
4. The rice bran sorting tank, the rice bran sorting sieve, and the degreasing bran regenerating device are all vertically rotating. The described rice polishing device.
5-1. The rice bran sorting sieve and the rice bran sorting sieve are characterized by having a common axis of rotation. The described rice polishing device.
5-2. A rice bran sorting sieve that grinds milled rice using a defatted bran and sorts the defatted bran and rice after the rice polishing process.
It is characterized in that a perforated cylinder and a ventilation mechanism are provided inside the perforated cylinder. The described rice bran sorting sieve.
5-3. The blower mechanism is a rotating plate. 5-2. The described rice bran sorting sieve.
5-4. The degreasing bran regenerator is a device that grinds milled rice using degreasing bran, selects used degreased bran after the rice polishing process, and reuses it.
It is equipped with an input port for inserting used degreased bran, a separation unit, and a collection unit for collecting regenerated degreased bran.
The separation part is provided with a vertical outer cylinder and a tubular sieve arranged inside the outer cylinder.
The outer cylinder is characterized in that one of the outer cylinders is provided with a blower portion and the other is provided with a suction portion, and the tubular sieve is provided with a rotation mechanism. The degreasing bran regeneration device described.
5-5. 5-4. The tubular sieve is provided with a perforated tubular body and / or a rotary inclined plate. The degreasing bran regeneration device described.
5-6. The tubular sieve is characterized in that no hole is provided on the lower end side 5-4. Or 5-5. The degreasing bran regeneration device described.
5-7. Rice bran sorting sieve is 5-2. Or 5-3. It is a rice bran sorting sieve described in
The degreasing bran regenerator is 5-4. ~ 5-6. 4. It is a degreasing bran regenerating device described in any of the above. Or 5. The described rice polishing device.
6. A process of mixing milled rice with defatted bran and applying a rubbing rice polishing treatment to separate fine powder such as skin bran adhering to the milled rice and separating it from the defatted bran to produce unclean rice.
A process of removing free fine powder by air-transporting unclean rice from the bottom to the top and collecting the free fine powder scattered in the transport flow.
Adhesive fine powder removal process, in which water mist is sprayed on clean rice from which free fine powder has been removed, air is transported from below to upward, and the adhered fine powder separated during transport is collected.
A method for producing clean rice, which is characterized by being equipped with.

1. 1. We were able to produce clean rice with improved cleanliness. By reviewing each process of the method for producing clean rice proposed so far and adding new means, the cleanliness of clean rice could be improved.
2. The raw clean rice separated from the defatted bran contains defatted bran fine powder that has not been completely separated and fine powder that adheres to the rice grains, and the fine powder remains on a simple sieve. Using this, fine powder removal was applied in two stages to produce clean rice with improved cleanliness. This technique can also be applied to ordinary polished white rice to improve the cleanliness of the white rice.
In this two-step finishing, first, by air-transporting from the bottom to the top, rice grains and fine powder are scattered and suspended, so dust is collected on the upstream side. Next, the fine powder adhering to the rice grains is exposed to water mist and humidified, and the fine powder adhering to the rice grains is separated by the air flow or the stimulus that the rice grains come into contact with each other by air transporting the rice grains in a state where they can be easily separated from the surface of the rice grains. Then, dust is collected on the upstream side. If water adheres to the surface of the rice grains and there is fine powder on the surface, the humidity of the fine powder rises, a moisture difference occurs between the rice grains and the rice grain body, and it is considered that the rice grains are easily separated by mutual friction during transportation.
3. 3. Further, in the present invention, it is also proposed to provide a pressure portion on the upper part of the rice polishing tank, and since the grain and the defatted bran pass through a narrow gap in the rice polishing tank, the temperature of the grain is raised by friction. When the temperature rises and the temperature of the rice rises, it dries and causes cracks and chips, but as a result of suppressing overheating of the rice by supplying water mist, cracks and chips can be prevented and humidity can be controlled. It will lead to the improvement of.
4. By providing the pressurizing portion on the upper part of the rice polishing tank, the length (height) of the rice polishing tank can be shortened, and the installation height of the rice polishing apparatus can be suppressed. By lowering the installation height, the operation and management of the rice polishing equipment becomes easier. In particular, when the rice polishing tank, rice bran separation sieve, and degreasing bran recycling device are arranged in series and vertically, the effect of suppressing the installation height of the rice polishing device is high, and work at heights including the supply of rice milling and degreasing bran can be performed. What can be reduced makes it easier to manage, including safety.
In the present invention, a rotating rod is used as the pressurizing means to prevent excessive pressurization and prevent clogging and breakage of rice grains. In the present invention, which employs a rice polishing means for passing between a rotating rod and a fixed rod, even if excessive pressure is applied, a large force is applied to the rice grains passing through the passing portion, which is not beneficial. Forced molds such as mold feeders are not suitable.
5. The rice polishing apparatus of the present invention improves the cleanliness of milled rice and clean rice by adopting a pressure type rice polishing tank, removal of free fine powder by air transport, water mist supply, and removal of adhered fine powder by air transport. As the height of the device was low, the manageability could be improved.
6. The clean rice produced in the present invention has a cleanliness such that it can exhibit a suspendability of 20 ppm or less in one washing with water. 20 ppm or less is cleaner than the final sharpened water when rice is usually sharpened and cooked, and is as clean as or better than the non-washed rice that is generally distributed.
7. Furthermore, the following effects are exhibited by devising each component.
(1) In the rice polishing apparatus of the present invention, the rice and bran are continuously processed in the falling direction by arranging the rice polishing tank, the rice bran sorting sieve and the degreasing bran recycling apparatus vertically as a vertically rotating device. It was possible to realize labor saving and compactness.
(2) By using a rice bran sorting sieve having a rotating plate having a vertical axis, the rice bran sorting tank having a vertical rotating axis and the rotating axis can be shared, and the motor can be made common.
(3) In order to realize that rice and bran are processed while falling, in the rice bran sorting sieve, the mixture of rice and bran discharged from the outlet of the rice bran tank is blown off by the wind generated by the vertical rotating plate. As a result, heavy rice either falls downward or hits the perforated cylinder and falls. Light bran is discharged from the hole of the perforated cylinder, and rice and bran are separated. The holes formed in the perforated cylinder are set to a size that allows rice to pass through but rice bran to pass through.
The rotating plate is a function of wings that generate wind, and the falling rice may hit the plate and be bounced off, but since there is a perforated cylinder, it does not jump out of the perforated cylinder and falls. Further, by blowing air from the central part such as blowing air from the rotating shaft, the action of blowing off the lightweight bran can be enhanced. In this case, for example, the rotating shaft is a hollow pipe, and air is sent from the shaft end.
This sorting is basically gravity sorting, in which heavy rice is dropped nearby and light defatted bran is blown outward. The perforated cylinder mainly collects rice that is blown off by a rotating plate or the like. The degreased bran mixed in the separated rice portion is removed by a finishing sieve in a subsequent process.
(4) The degreasing bran recycling device is provided with an inlet for inserting used degreasing bran, a separation unit, and a collection unit for collecting the regenerated degreasing bran. The separation unit is a vertical outer cylinder and an outer cylinder. It is provided with a tubular sieve having a sieve hole arranged inside.
The outer cylinder of the separation part has a blower part on one side and a suction part on the other side, and has a structure in which fine skin bran and finely powdered degreased bran are sucked out from the suction part. A tubular sieve having olfactory holes arranged inside the outer cylinder has a sieving function. The olfactory foramina is a hole having a size that prevents the reusable degreased bran from passing through. The used degreasing bran descends using a rotating tubular sieve, and during the descent, it receives suction and ventilation, and allows fine components to pass through on the suction side. Even if the olfactory foramina of the tubular sieve is clogged on the suction side, it is blown off on the blower side and scattered while moving to the suction side, and the fine composition is discharged on the suction side. Produced in available degreasing sieve. Since it is repeatedly screened, the quality of the defatted bran to be reused is improved.
Used degreased bran contains fine powder with strong adhesiveness such as skin bran, which causes the degreased bran to become lumps and clog the olfactory holes of the tubular sieve. It is important to prevent clogging of the olfactory foramina of the shape sieve and maintain the sieving function. The separation part of the degreasing bran regenerator of the present invention is exposed to suction and blast while rotating the tubular sieve, so that even if the suction side is clogged, it is exposed to the blast and cleaned to regenerate the sieve function. The Rukoto.
That is, since the rotating tubular sieve is made vertical and has a constant cleaning function by blowing air and suction, the sieve function can be maintained even if there is a component such as skin bran having a strong adhesive force. In addition, the degreased bran is also scattered and loosened while moving from side to side on the wind. Therefore, in the degreasing bran regenerating device, it functions as a mesh sieve used by rotating a cylindrical sieve vertically.
Further, in the present invention, as a means for accelerating the decomposition of the lump of degreased bran, a perforated tubular body is arranged concentrically inside the tubular sieve, and an umbrella-shaped rotary inclined plate is arranged inside the tubular sieve. ing.
By providing the perforated cylinders concentrically arranged inside the tubular sieve, the mass of degreased bran passes through the perforated cylinders and decomposition is promoted. The diameter of the holes in the perforated cylinder is larger than the diameter of the sieve holes in the outer tubular sieve.
The degreased bran rolls up and down along the inclination of the rotating inclined plate, and decomposition is promoted during that time.
The umbrella-shaped inclined rotating plate can be used in combination with a perforated cylinder.
(5) By blinding the lower side of the tubular sieve without providing holes, a portion that is not affected by ventilation and suction is formed to promote the fall of the regenerative degreasing bran and promote the recovery.
(6) In the rice polishing apparatus of the present invention, these devised rice bran sorting sieves and degreasing bran regenerating apparatus are suitable for being combined vertically with the rice polishing tank, and are arranged vertically in a row so as to be high in the entire rice polishing apparatus. It is low in size, does not take up space, saves space, saves energy, and is easy to maintain.

Block diagram of rice polishing equipment The figure which shows the outline of the example of the rice polishing apparatus Diagram showing an example of a rice mill The figure which shows the example of the fine powder removal device with a mist feeder The figure which shows the example of the rice bran sorting sieve The figure which shows the example of the degreasing bran regenerator The figure which shows the example of the new degreasing bran mixing mechanism The figure which shows another example of the degreasing bran regenerator Example 2 of a tubular sieve for a degreasing bran regenerator Example 3 of a tubular sieve for a degreasing bran regenerator Example 4 of a tubular sieve for a degreasing bran regenerator

The present invention will be described in detail below.
The present invention relates to a technique for processing milled rice into clean rice by using defatted bran as a rice polishing material.
A block diagram of the clean rice production system is shown in FIG.
The rice polishing device 1000, which is a clean rice production system, is composed of a rice polishing system 100, a rice milling system 200, a degreasing bran supply system 300, a clean rice finishing system 400, and a waste system 500.
In the rice polishing device 100, the defatted bran B and the rice milling A, which are the rice polishing materials, are put into the rice polishing tank, mixed, rubbed and polished, and both are discharged as the mixed rice polishing product C. Then, the degreased rice bran and the like are separated to obtain unclean rice D. The unclean rice is carried out to the clean rice finishing system 400.
The rice milling system 200 supplies the rice milling A obtained by processing brown rice with a rice milling machine to the entrance of the rice milling tank of the rice milling system 100.
The device 300 of the degreasing bran supply system supplies the degreased bran to the entrance of the rice polishing tank of the rice polishing system 100, and in the present invention, the once used degreased bran discharged from the rice polishing tank is regenerated. It is recycled and used to supply new defatted bran as a shortage.
The clean rice finishing device 400 removes the fine powder mixed in the unclean rice D discharged from the polishing rice system 100 and the fine powder adhering to the unclean rice D to finish the clean rice with high cleanliness. ..
The waste system 500 is waste that is discharged from each process, such as skin bran separated from rice milling A, degreased bran that has become so small that it cannot be reused, and chipped rice.

In the present invention, in particular, (1) a pressure portion is provided on the entrance side of the rice polishing tank to shorten the rice polishing portion by the rice polishing rod and the resistance rod, and the entire rice polishing tank is miniaturized (shortened). When placed vertically with the rice polishing tank, the top of the rice polishing tank can be lowered, and rice milling and degreasing bran input management can be facilitated. The rice polishing tank can be a horizontal type, and even in this case, the size can be reduced.
(2) As a clean rice finishing process, the fine powder mixed in the defatted rice bran discharged from the rice polishing tank and the raw clean rice separated and recovered is placed on an ascending stream by air transportation to separate the grains and the mixed fine powder. A free fine powder removing device was provided to collect dust in a scattered state.
(3) As a clean rice finishing process, in order to further remove the fine powder adhering to the rice grains, water mist is sprayed from the lower side of the air transport to humidify the adhering fine powder and make it easy to peel off. Therefore, an air-conveyed device is provided to clean the clean rice by separating and collecting the adhering fine powder by receiving the action of mutual contact and scattering of rice grains by the ascending current.
The two-step fine powder removing device used in these finishing steps is a technology that can be applied not only to clean rice but also to milling rice.
(4) A turbidity type or small type rice polishing device that can be applied to low installation locations by reducing the height of the rice polishing device and facilitates operation management by omitting work in high places. By providing a finishing process for clean rice with a removal function, we have realized a rice polishing device that produces clean clean rice (fresh clean rice) that can suppress the washing water to a low turbidity.
In the present invention, each component of the clean rice production apparatus proposed in the past by the present inventors can also be used. In addition to the patent documents mentioned above, Japanese Patent Application No. 2018-076461 can be mentioned.

The outline of the rice polishing method using the defatted bran as the rice polishing material is as follows.
1. 1. The rice polishing method using defatted bran as a rice polishing material does not scrape off the surface layer of the rice grain, but the nuka remaining on the rice grain after polishing (“nuka” means the rice bran remaining on the surface of the rice polishing, and starchy substance. It is also called skin bran that contains a lot of rice. In order to distinguish it from the rice bran that is produced during rice milling, it is referred to as "skin bran". In order to peel off this skin bran (which contains peeled fine powder material such as "starch"), a defatted bran is used. For example, a bran obtained from rice on the surface of rice grains. The degreasing bran obtained by removing the oil component from the bran is used for the rice polishing material. The rice polishing method using the degreasing bran is efficient in processing a large amount of rice in a short time. It has the property and can be cleaned by polishing the surface of each rice grain, polishing the rice to remove starch from the surface of the rice grain, and cleaning the rice to the extent that it does not need to be washed when cooking rice.
2. Rice grains and milled rice materials are discharged from the rice milling tank in a mixed state, and the rice grains are sorted and collected from this, and a finishing sieve is performed to collect the unclean rice. When collecting rice grains, the rice grains are heavier than the defatted bran and skin bran, which are the polished rice materials, so by sending a horizontal wind while dropping impurities, the heavy rice grains are dropped downward and the lightweight ones are blown away. It can be separated and sorted.
3. 3. Since the amount of degreased bran used for rice polishing is about the same as that of rice in bulk, recycling without discarding is an important elemental technology in the development of rice polishing equipment. The applicant has developed a device capable of effectively removing starch from the defatted bran to regenerate the defatted bran and use it in a circulating manner. The clean rice provided in the present invention can be positioned as one of "wash-free rice", and "wash-free rice" follows the definition of the Japan Rice Milling Industry Association.

<Example of basic configuration of rice polishing equipment>
The basic configuration of the rice polishing apparatus of the present invention is as follows.
Raw rice milling and defatted rice bran are put into a rice milling tank, and both are rubbed in the rice milling tank to attach the starchy skin bran adhering to the rice milling to the defatted rice bran and peel it off from the milled rice. After that, the polished rice is separated as unclean rice and sent to the finishing device, and air transport is used to remove impurities mixed in the unclean rice, and then the rice is cleaned. The rice is sprayed with water mist and air-conveyed to separate and remove the fine powder adhering to the clean rice, and the humidity is controlled to finish the rice as clean rice with improved cleanliness.
On the other hand, defatted bran and the like other than clean rice are refined as defatted bran that is reused by performing a regeneration treatment for removing the worn-out and finely defatted bran and skin bran.
As described above, the device configuration of the rice polishing apparatus uses the apparatus disclosed in Japanese Patent No. 4153844, Japanese Patent No. 47384427, Japanese Patent No. 5261294, and Japanese Patent Application No. 2018-076461 proposed by the present applicant. it can.

The main components of the rice polishing apparatus proposed in this application will be described below. In the present invention, the rice polishing tank and the device for finishing clean rice have been particularly improved.

[Rice tank]
The rice polishing method using defatted bran as a rice polishing material is based on the methods and devices disclosed in Japanese Patent No. 4153844 and Japanese Patent No. 5261294 proposed by the applicant. The vertical rice polishing tank is disclosed in Japanese Patent No. 5261294.
An example of a vertical rice polishing tank is a vertically provided cylindrical type, in which a resistor provided in a cylindrical body arranged at intervals and a rotating body provided in a rotating shaft are provided in the rice polishing tank. This is a rice polishing method in which rice grains and a rice polishing material (defatted rice bran) are supplied at intervals between two objects to grind the rice grains while moving the charged rice from the top to the bottom.
It is a device that grinds rice by rotating and stirring the rice milling and degreasing bran stored in the rice milling tank, and is fixed to the inner wall of the tubular rice milling container of the rice milling tank at intervals in the length direction. A rod-shaped rice polishing rod is arranged in the rice polishing container so as to move relative to each other, and the rice polishing container and the rice polishing rod are arranged so as to move relative to each other. It is a rice polishing device equipped with a machine.
In the rice polishing tank of the present invention, a pressurizing portion is provided in front of the rice polishing portion by the resistor and the rice polishing rod. The pressurizing section is provided with an inclined rod on the rotating shaft to apply downward feeding pressure to the rice milling. This pressurizing rod does not generate a strong pressure like a screw, but a round rod with a slightly flat surface, and while applying pressure with a slight twist, rice grains slip through the rod body. It is a mechanism that generates light enough pressure. This is to prevent damage such as chipping due to a large force applied to the rice grains when excessive pressure is applied to the rice polishing part where the rice is passed through the narrow space between the resistor and the rice polishing rod. ..

[Rice bran sorting sieve]
The rice bran sorting sieve is a device that separates clean rice and polished rice material after mixing milled rice and defatted rice bran, which is a rice bran material, and polishing the rice in a rice polishing tank.
The example of the rice bran sorting sieve proposed in Japanese Patent Application No. 2018-076461 utilizes a wind selection means for separating a product having a small specific gravity by blowing wind while dropping a processed rice product from a rice bran polishing tank. ..
The mechanism of the rice bran sorting sieve includes a vertical perforated cylinder and a blower that generates wind from the inside to the outside of the perforated cylinder. The size of the holes in the perforated cylinder is smaller than that of the rice grains. The processed rice material released from the rice polishing tank is thrown in from above the perforated cylinder, and the processed rice material hits the outward wind while falling down the perforated cylinder, resulting in light substances such as degreased bran (degreased rice bran). The powder and granules) are released to the outside through the holes of the perforated cylinder, and the heavy rice falls below the perforated cylinder to separate the rice from the defatted bran (powder and granules). is there. In the sieve for selecting rice bran, it is permissible that some rice bran components are mixed with the rice components to be dropped and collected. The rice component separated here is called unclean rice, and the rice bran component is separated and finished as clean rice in a later process.
Due to the presence of the perforated cylinder, the rice grains can be dropped against the wall inside the cylinder and collected, and it is not necessary to increase the area required for sorting rice and bran.
The perforated cylinder is a cylinder having holes smaller than rice grains and sufficiently larger than defatted bran, and a metal such as stainless steel or a material such as plastic can be used. As a material having holes, a punching metal, a mesh-like mesh body, or the like is used. Since the holes of the perforated cylinder have a diameter sufficiently larger than that of the defatted bran, the defatted bran can be passed through without clogging.

As the blower, a device for blowing air from a rotating plate or a blower pipe provided in the center of the perforated cylinder is used. The rotating plate exerts a rotating fan function, but it may bounce rice grains, and the bounced rice grains hit the inner wall of the perforated cylinder and fall.
It is not necessary to rotate the perforated cylinder, but by rotating it, centrifugal force can be exerted to prevent clogging, and further, it is possible to apply a brush from the outside for cleaning.
It is equipped with a cylinder with a mesh body and a blower installed in the center of the cylinder. When the polished rice is dropped from above the cylinder, light degreasing bran etc. is blown off from the mesh of the cylinder. It is discharged to the outside and heavy clean rice falls to the bottom of the cylinder.
The clean rice is further subjected to a finishing sieve to obtain a finished clean rice.
The degreased bran is made into a regenerated degreased bran by a degreasing bran regenerating device for further reuse.

In the present invention, as a finishing process of clean rice, a screw conveyor type rice lifting device equipped with a fine powder removing device with a mist supply device for supplying water mist to unclean rice to remove fine powder and a dust collector is provided to improve the cleanliness. Was improved.

[Free fine powder remover]
The unclean rice taken out from the above-mentioned rice bran sorting sieve through a transport gutter or the like contains impurities that have not been completely separated. Clean rice mixed with this contaminant is transported from bottom to top using air to separate the contaminants, scatter them in the air, and remove free fine powder that collects floating contaminants. The device was provided.
It is a device that transports unclean rice from the bottom to the top in the cylinder that transports air, and installs a dust collector above it to collect impurities.

[Water mist supply adhering fine powder removal device]
Fine powder that cannot be separated and recovered even by removing the free fine powder in the previous process is attached to the rice grains. Many of these persistent adherent fine powders are those in which the skin bran that was once peeled off in the rice polishing process reattached to the rice grains. In the present invention, water mist is sprayed to humidify the adhered fine powders on the surface of the rice grains to provide air. Adhering fine powder is shed from the rice grains by scattering due to transportation and contact stimulation between rice grains. The separated fine powder is collected by a dust collector provided above to improve the cleanliness of the clean rice.
Even if you spray fine mist-like water mist, water droplets like a shower do not adhere, so the whole becomes a humidified atmosphere, and the powdery fine powder on the surface is first humidified, and the humidity with the rice grain surface It is thought that a difference can be made and it becomes easier to separate. After that, the rice grains are also humidified, and the humidity can be adjusted to an appropriate moisturizing state.
This water mist supply adhering fine powder removal device is provided with a nozzle for spraying water mist below the air transport cylinder provided in the vertical direction (including vertical inclination), a dust collector is provided at the top of the cylinder, and grains are collected from the city. It is a device that conveys air upward.
The obtained clean rice will be referred to as clean rice F2 (or "fresh clean rice").

[Degreasing bran regeneration device]
The degreasing bran regenerating device proposed in Japanese Patent Application No. 2018-076461 is an apparatus for reusing the degreasing bran used for polishing rice.
The polished rice that has left the rice bran is a mixture of polished clean rice (rice grains), used defatted bran, worn defatted bran, and fine powder such as skin bran (starch) that has peeled off from the rice bran. The rice bran is put into a sorting sieve, and the clean rice is separated from the skin bran and the defatted bran in the rice bran sorting sieve.
The used degreased bran is a mixture of rice bran that has become finer due to wear and tear during the rice polishing process, and nuka (skin bran) that has a large amount of starch that has been peeled off from the raw rice milled during the rice polishing process. The degreasing bran regeneration device is a device that removes fine powder such as skin bran and finely degreased bran to make it a reusable degreasing bran.
The configuration of the degreasing bran regenerating device is a degreasing bran regenerating device that grinds rice using the degreasing bran, selects and reuses the used degreasing bran after the rice polishing treatment, and puts in the used degreasing bran. It is equipped with a loading port, a separation unit, and a collection unit for collecting recycled degreased rice bran. The separation unit has a vertical outer cylinder body and a rotating portion having a large number of small holes arranged inside the outer cylinder. It is provided with a hole cylinder and / or a rotating inclined plate, and one of the outer cylinders is provided with a blower portion and the other is provided with a suction portion.

The separation portion has a vertical cylindrical shape and includes an outer cylinder and a tubular sieve.
The outer cylinder is provided with a blower and a suction part at opposite positions, and a blower is connected to the blower and an intake device is connected to the suction part. Alternatively, it may be either a blower device or an intake device.

The tubular sieve is a rotating tubular body formed by using small holes provided in a punching metal, a mesh screen, or the like as sieve holes. The size of the hole is such that the degreased bran to be reused cannot pass through. The tubular sieve has a function of passing a small material to be discarded and collecting it without passing through a degreasing bran having a size for reuse. This tubular sieve functions as a mesh sieve. Since the tubular sieve is a vertical type, it is necessary to send the object to be sorted in the horizontal direction, and the object to be sorted is placed on the horizontal wind generated by the air outlet and the suction port provided opposite to the outer cylinder. Polished rice materials (defatted bran, etc.) separated in the previous process, which are products, are sent in the horizontal direction. In addition, "sending in the horizontal direction" here means flowing from one side to the other in the cross-sectional direction of the vertical cylindrical sieve, and does not mean completely horizontal, and is accompanied by diagonal movement. It is a thing. Further, since the mechanism is to throw in from the top and collect from the bottom, the degreasing bran of the size to be collected will gradually descend.
Then, since the tubular sieve rotates, the degreased bran or the like that once clings to the inner wall of the cylinder on the suction port side of the outer cylinder is blown off when it rotates and moves to the blower side, and is sorted again. Therefore, by rotating this vertical cylindrical sieve and blowing air from one side to the other side, the sieving action is repeated and the sorting accuracy is improved.
Further, even if the olfactory foramina provided in the tubular sieve is clogged, it is blown off when it rotates and turns to the blower side, and the clogging is cleared.

The tubular sieve may be further provided with a perforated tubular body or a rotary inclined plate as an internal configuration.
The objects to be sorted in the tubular sieve are composed of degreased bran, which is the rice polishing material used for polishing rice, and skin bran peeled off from the milled rice. In particular, since the skin bran has adhesive force, the degreased brans are separated from each other. It may be attached to form a lump. In order to loosen this mass and exert the sorting performance of the sieve, these perforated cylinders and rotary inclined plates are provided. Since the holes provided in the perforated cylinder do not have a sieving function, the holes are the same as or larger than the mesh.
The perforated cylinder is formed into a cylinder using punching metal, a mesh screen, a wire mesh, or the like. The perforated cylinder is arranged concentrically with the tubular sieve and rotates. As it rotates, it will be repeatedly blown and sucked, so the loosening effect will be improved. A plurality of perforated cylinders may be provided. Further, the perforated cylinder can be provided with a large space such as arranging an empty space and a perforated plate to form a strong or weak air flow or a turbulent flow.

The rotary inclined plate has a shape such as a cone, and a plate without holes or a perforated plate can be used as a material. The loosening effect can be achieved by exerting the action of blowing up the degreasing bran or the like along the inclination of the inclined plate on the blowing side. A hole is provided in the rotating inclined plate so that wind, degreasing bran, and fine powder can pass through the hole to exert a loosening function.
By arranging the rotary inclined plates in multiple stages, the loosening action can be exerted in multiple stages, the falling speed of the degreasing bran and the like can be relaxed, and the number of times of the sieving action by the vertically placed cylindrical sieve can be increased.
The number of plates to be provided is arbitrary, and the rotation behavior of used degreased bran or the like changes depending on the plate inclined in an umbrella shape, causing dispersion and dispersal, and improving sorting efficiency. Further, by providing a large number of protrusions and holes on the upper surface of the plate body, it assists the used degreasing bran and the like to collide, decompose, and disperse. The protrusion is preferably a thin needle-shaped body or a triangular rod.
The perforated cylinder and the rotary inclined plate can be used alone or in combination.

FIG. 2 shows an example of the rice polishing apparatus according to the first embodiment.
The rice polishing device 1000 includes a rice polishing device 100, a rice milling supply system device 200, a degreasing bran supply system device 300, and a clean rice finishing system device 400. Since the waste system is generated from various places such as the rice bran sorting sieve, the degreasing bran recycling device, and the clean rice finishing process, the notation is omitted.
From the top, the rice bran sorting tank 1, the rice bran sorting sieve 2, and the degreasing bran regenerating device 3 are arranged vertically in this order. A degreasing bran supply system device 300 and a rice milling supply system device 200 are arranged on the side. Further, a clean rice finishing system device 400 is provided on the side, and unclean rice is sent out from below the rice bran sorting sieve 2 toward the clean rice finishing system device 400. The degreased bran regenerated from the lower part of the degreased bran regenerating device 3 is supplied to the degreased bran supply system device 300, and a new degreased bran is replenished on the way. The rice milled to be supplied to the rice milling tank 1 is supplied from the rice milling storage tank 53 provided in the rice milling supply system device 200. A rice milling hopper 52 and a degreasing bran hopper 42 are provided above the rice polishing tank 1.
The rotating shaft 11 of the rice polishing tank 1 is rotated by the rice polishing shaft rotation motor 12. In this example, the driving force of the rice bran shaft rotation motor 12 also rotates the shaft of the rice bran sorting sieve 2.

The rice milling and degreasing bran treatment is performed as follows.
Rice milling A is temporarily stored in the upper rice milling hopper 52 from the rice milling storage tank 53 through the grain raising cylinder 51. On the other hand, in the degreased bran B, which is a rice polishing material, the new degreased bran H initially stored in the new degreased bran storage tank 43 rises up the frying bran cylinder 41 and is temporarily stored in the upper degreased bran hopper 42. ..
Rice milling A and defatted bran B are supplied from their respective hoppers to the rice polishing tank 1 in a predetermined ratio, and the rice is polished to be a mixture of rice grains, defatted bran, and skin bran peeled from the rice milling. The processed product C is discharged from the discharge port 16 at the bottom of the rice bran 1 and enters the rice bran sorting sieve 2 as it is. In the rice bran sorting sieve 2, the rice grains are separated and separated into unclean rice D and powder granules E. To.
The unclean rice D is transferred to the clean rice finishing system device 400, and fine powder, waste rice, etc. are separated in the finishing process to finish the unclean rice F2.
The powder and granules E, which are a mixture of the defatted bran used for polishing rice and the skin bran peeled off from the milled rice, are processed by the defatted bran regenerator 3 and recycled defatted bran G having a size that can be reused. Fine powder J1 such as skin bran mixed with skin bran and degreased bran that has been worn and pulverized, and fine powder J2 such as skin bran discharged from the shifter are separated. The regenerated degreased bran G is supplied to the lower part of the frying bran cylinder 41, and new degreased bran is replenished as a shortage on the way, and is supplied to the upper degreased bran hopper 42. As a result, the degreased bran is used in a circulating manner.

[Rice polishing machine]
An example of the rice polishing machine 101 is shown in FIG. The rice polishing machine 101 includes a rice polishing tank 1 and a rice bran sorting sieve 2.
The rice polishing tank 1 is provided with a pressurizing portion 111 above the rice polishing portion 110, and is a container tank 10, a rotary shaft 11, a rice polishing shaft rotating motor 12, a pressure rod 112, a resistor 13, and a polishing tank 1. It is provided with a rice bar 14, an inlet 15, and an outlet 16. The rice milling A and the defatted bran B are charged from the inlet 15 provided above the tank 10, and in the rice polishing section 110, the rice milling A and the defatted bran B are rotationally stirred and polished in the tank 10 to polish the rice milling A and the defatted bran B. It is a rice polishing tank 1 that discharges the rice-polished rice from the discharge port 16 provided below the above, and in the tank 10, a plurality of resistors 13 attached to the inner wall of the tank 10 and a rotating shaft 11 The rice polishing rod 14 provided in the above is arranged. In a rice polishing tank configured to rotate the rice polishing rod 14 in the tank and to perform the rice polishing action by rubbing the rice polishing and the defatted bran while restricting the movement of the rice polishing by the resistance action of the resistor 13. is there.
A pressurizing section 111 is provided above the rice polishing section 110. A pressure rod 112 is provided on the rotating shaft 11 at an angle. The pressure rod 112 acts on the rice milling A and the degreasing bran B put into the tank, and a downward pressure is generated. The pressure generated by the pressure rod 112 is not such that an excessive pressure is generated in the rice polishing portion and the rice milling is cracked by the rotation of the rice polishing rod.
The pressure rod should have a shape such as a round rod or an elliptical cross section that allows rice grains to slip through, and can be attached with a twist.

[Rice bran sorting sieve]
The rice bran sorting sieve 2 is a device for sorting rice bran by using a wind sorting means that separates low-specific gravity items such as degreased bran by blowing wind while dropping the polished rice processed product C from the rice bran tank 1. ..
A detailed example of the rice bran sorting sieve 2 is shown in FIG.
The overall configuration of the rice bran sorting sieve is shown in FIG. 5A. The rice bran sorting sieve 2 has a perforated cylinder 21, a blower mechanism 22 (rotary plate 27), a rotating shaft (blower) 23, and a perforated cylinder throttle end. It includes 24, a housing 25, a rice feeding cylinder 26, a receiving hopper 28, and a lower opening 29.
The cross-sectional structure is shown in FIG. 5 (b). The cross section has a rotating shaft 23 at the center, and a rotating plate 24 is provided on the rotating shaft 23. A perforated tubular body 21 having holes 21b concentrically with the rotating shaft 23 and a housing 25 outside the perforated cylinder 21 are arranged. The rotating shaft 23 can be shared with the rotating shaft 11 of the rice polishing tank 1 or can be a mechanism linked to the rotation of the rotating shaft 11. In this example, it is represented as a common axis.
The rotating plate 27 exerts the function of a fan by rotating, and sends wind to the surroundings to exert a blowing function. By using the rotating shaft 23 as a cylinder provided with a large number of holes and blowing air into the cylinder, it is possible to exert the blowing function used as an air blowing cylinder. As the ventilation mechanism, both or one of the rotating plate 27 and the rotating shaft 23 serving as the air blowing cylinder can be used.

A material example of the perforated cylinder 21 is shown in FIG. 5 (c). The perforated material 21a is a punching metal. The holes 21b are selected to be smaller than the size of rice grains and larger than the defatted bran. Although it uses wind selection, it plays the role of a shielding plate because there are rice grains that are repelled by the rotating plate. In addition, since rice grains can be dropped against the inner wall of the cylinder and collected, there is no need to increase the area required for sorting rice and bran, and by actively using the function of the shielding plate, the perforated cylinder The diameter of the can be reduced. As the perforated tubular body 21, a fixed type or a rotating type attached to a rotating shaft can be adopted.
The material example of the perforated cylinder is made of punching metal with priority given to durability, but it can also be made of plastic. In the case of plastic, although it is inferior in durability, it can be replaced frequently and made disposable. Therefore, a metal such as stainless steel and a material such as plastic can be used. As a material having holes, a punching metal, a mesh-like mesh body, or the like is used. The holes of the perforated cylinder form a diameter sufficiently larger than that of the defatted bran, and allow the defatted bran to pass through without clogging.

The rice bran sorting sieve 2 includes a vertical perforated cylinder 21, a blowing mechanism 22 that generates wind from the inside to the outside of the perforated cylinder 21, and a housing 25 that encloses the perforated body 21. ing. The size of the hole 21b of the perforated cylinder 21 is smaller than that of the rice grain. The rice-polished product C discharged from the rice-polishing tank 1 is received from the receiving hopper 28 provided above the perforated cylinder 21. The polished rice processed product C, which is a mixture of polished rice grains and defatted rice bran, hits the outward wind created by the blower mechanism 22 (rotary plate 27 or blower cylinder 23) while falling inside the perforated cylinder 21. , Light substances (powdered granules E) such as degreased rice bran pass through the holes 21b of the perforated cylinder 21 and are released to the outside, and heavy rice grains fall inside the perforated cylinder 21 and the perforated cylinder squeezed end. It is collected in 24 to become unclean rice D, collected in a rice delivery cylinder 26, and sent to a clean rice finishing system 400. On the other hand, the powder or granular material E, which is a lightweight component such as degreased bran that has come out from the hole 21b of the perforated tubular body 21, passes through the lower opening 29 of the housing 25 and is thrown into the degreased bran regenerating device 3.

The blower can be constructed by a blower mechanism 22 in which a rotary plate 27 is attached to the rotary shaft 23 to exert a fan function, or a blower mechanism in which a cylinder provided with a large number of blowout holes is used as the rotary shaft 23. The rotating plate 27 and the blower cylinder 23 can be used alone or when they are insufficient alone.

[Clean rice finishing device]
The clean rice finishing system 400 includes a fine powder removing device 401 for removing free impurities and a humidifying fine powder removing unit 402 for removing fine powder adhering to rice grains. Both devices remove fine powder to improve the cleanliness of clean rice, cool the rough heat, control the humidity, prevent deterioration of the quality of clean rice, and improve the quality.

[Free fine powder remover]
FIG. 4 shows an example of the fine powder removing device 401.
The fine powder removing device 401 receives the unclean rice D after the rice bran sorting sieve 2 from the rice delivery cylinder 26, sends the unclean rice D from the bottom to the top in the air transport cylinder 411 while scattering the unclean rice D, and is a dust collector provided at the top. It is a device that collects fine powder at 430 to obtain clean rice F1 from which impurities have been removed.
The illustrated fine powder removing device 401 includes an air transport cylinder 411, a suction fan 412 provided on the upper part of the air transport cylinder, a dust collector 430 provided on the upper part of the air transport cylinder 411, and a dust collector 430 for collecting fine powder. It includes a dust bag 431 and a relay cylinder 415 provided on the upper outlet side of the air transport cylinder 411. The lower part of the air transport cylinder 411 is provided with an opening so that air can be sucked in, and a rice receiving hopper 417 is provided. Facing. The rice receiving hopper 417 is made of a breathable material such as punching metal.
By suction by the suction fan 412, as the air 422 taken into the air transport cylinder 411 rises, the unclean rice D is also sent upward, and the grains and impurities exposed to the air flow are separated and separated above. It is sucked by the dust collector 430 and collected in the dust collector bag 431.
The clean rice from which impurities have been removed is sent to the lower part of the air transport cylinder 441 of the humidifying fine powder removing device 402 through the intermediate cylinder 415.

In the figure, the air transport cylinder 411 is upright, but an inclined cylinder can also be adopted. The air transport is a suction type, but a fan system for blowing air from below can also be adopted.

[Humidifying fine powder remover]
FIG. 4 shows an example of a humidifying fine powder removing device.
The humidified fine powder removing device 402 shown in the figure includes an air transport cylinder 441. A suction fan 442, a dust collector 432, a dust collecting bag 431 for collecting fine powder, and a clean rice feeding cylinder 416 are provided on the upper side of the air transport cylinder 441. There is a clean rice tank 480 at the tip of the clean rice feed cylinder 416, and the clean clean rice F2 is stored in the clean rice tank. The lower part of the air transport cylinder 441 is provided with an opening so that air can be sucked in, and a breathable rice receiving hopper 417 is provided, and the tip of the relay cylinder 415 that receives clean rice from the previous process. Is facing. Further, a nozzle 423 for spraying water mist 421 is provided on the lower side of the rice receiving hopper 417.
The water mist generator 420 includes a nozzle 423 and a compressor 424, and the water mist 421 sprayed from the nozzle 423 is taken into the sucked air 422 and becomes the water mist air 425 to enter the air transport cylinder 441. To rise. Water is supplied to the water mist generator 420 through a water supply pipe (not shown).

The humidifying fine powder removing device 402 takes in the clean rice F1 from which the free fine powder such as impurities has been removed in the previous step into the lower side of the air transport cylinder 441, and uses the fan 442 to take the water mist air 425 containing the water mist 421. It is supplied into the air transport cylinder 411, placed on the water mist air 425, and the clean rice F1 is spouted from the bottom to the top. While the clean rice F1 is being transported upward while being scattered, the fine powder adhering to the rice grains is separated. It is a device that controls the humidity of rice grains. The clean clean rice F2 discharged from the outlet has improved cleanliness by removing most of the adhered fine powder on the surface of the rice grains.
The freshly cleaned rice F2 clears the non-polished rice standard and can achieve a turbidity of 20 ppm.

In the clean rice F1, fine powder clinging to the rice grain remains, and the fine powder on the surface of the rice grain first touches the water mist 421 and is moist than the rice grain body, and there is a water difference between the rice grain body and the fine powder. There is, and it peels off in the process of mixing rice grains while being lifted by air transportation. The fine powder that has fallen off can be sucked by a dust collector 432 provided above and collected in a dust collecting bag 431 to obtain clean clean rice F2 (clean clean rice).
The fine powder removing device 401 and the humidifying fine powder removing device 402 for removing the liberated fine powder are finishing devices having generality that can be applied not only to the clean rice manufacturing device but also to the rice milling device.

[Degreasing bran regeneration device]
An example of the degreasing bran regenerating device 3 of this example is shown in FIG.
The degreasing bran regenerating device 3 is an apparatus for reusing the degreasing bran used for polishing rice.
FIG. 6A shows an overall configuration diagram. The degreasing bran regenerating device 3 includes an outer cylinder 6, a tubular sieve 7 arranged inside the outer cylinder 6, and a shifter 36 that sends the regenerated degreased bran to the degreasing bran supply system. An inlet 33 (common with the lower opening 29 on the rice bran sorting sieve 2 side) is provided above the outer cylinder 6.
In the degreasing bran regenerating device 3, the powder and granules E supplied to the inlet 33 pass through the tubular sieve 7 to separate the fine powder J1 such as the skin bran, and further, the fine powder J2 such as the skin bran is separated by the shifter 36. Then, it becomes a refined regenerated degreased bran G and is provided to the degreased bran supply system.

FIG. 6B shows the outer cylinder body 6. The outer cylinder 6 is provided with a housing 60 that covers the peripheral surface of the tubular sieve 7, a blower portion 61 on one side surface of the housing 60, and a suction portion 62 on the other side surface. A bottom plate 34 is provided on the bottom surface, and the bottom plate 34 is provided with a hole for passing the rotating shaft 31 and a discharge port 35 for dropping the recycled degreasing bran on a part of the bottom surface. Although the discharge port 35 is represented by a slit in the figure, the discharge area can be adjusted by using a part or the whole of the bottom plate 34 as a mesh material. Since the design of the opening for discharge is related to the flow of wind, it is possible to add a configuration in which a shutter is provided to adjust the opening area.
The upper surface is an opening. For the opening on the upper surface, consider the opening shape and opening area so that air does not blow out. A cross wind 63 is generated from the blower unit 61 toward the suction unit 62.
The air flow in the degreasing bran regenerating device 3 exerts a sieving action when a power such as a fan is provided on the suction side, so the suction device is indispensable. However, since the upper surface of the degreasing bran regenerating device 3 is open, it is difficult to suck the entire degreasing bran or the like that falls, and the sorting performance is not good. Further, by adding a blower portion to positively create an air flow from the blower side to the suction side, the falling degreasing bran or the like can be flowed in the horizontal direction, and the sorting effect can be improved. Therefore, it is appropriate that ventilation and suction are paired.

FIG. 6 (c) shows the tubular sieve 7. The cylindrical sieve 71 is used as a vertical type by rotating it. "Cylindrical sieve 7" represents a mechanism, and "cylindrical sieve 71" represents a tubular body of a mesh. The rotating shaft 31 is in the center, and a cylindrical sieve 71 is attached to the rotating shaft 31. The degreased bran or the like supplied from the rice bran sorting sieve 2 above is the eyes of the cylindrical sieve 71 provided vertically on the crosswind 63 flowing from the blower portion 61 provided on the outer cylinder toward the suction portion 62. It is a mechanism to be sorted.
Since the cylindrical sieve 71 rotates, the sieve function portion is constantly updated. Further, when the suction portion 62 is deviated from the suction portion 62, the wind pressure becomes weaker, and the degreased bran adhering to the inner surface of the sieve can be dropped and collected. Further, the portion of the cylindrical sieve 71 facing the blower portion 61 is exposed to strong wind from the surface side, and is in a state of being cleaned by blowing off clogging and substances adhering to the eyes. Therefore, by exposing the cylindrical sieve 71 to crosswind while rotating, the sieve function can be exerted even if it is a vertical type, and the cleaning action and the recovery function can be effectively exerted.
Further, by providing a blinded blind portion 72 (blind or fine mesh material) on the lower side of the cylindrical sieve 71 to reduce wind contact, the recoverability of the degreased bran can be improved.
A scraper that guides the subsided degreased bran from the bottom plate 34 of the outer cylinder to the discharge port 35 may be provided at the lower end of the cylindrical sieve 71. In that case, it is efficient to attach a scraper to the rotating shaft 31.

The sieve material used for the cylindrical sieve 71 is shown in FIG. 6 (d).
The sieve mesh used for this cylindrical sieve 71 has an opening smaller than that of the defatted bran. An example is a punching metal in which a round hole or a vertically long hole is formed. The material is stainless steel, which is durable and is ideal for hygiene and damage. Plastic can also be used satisfactorily.

The shifter 36 has a sieving function and a feeding function, can dispose of fine powder, and can supply a fixed amount of regenerated degreased bran to the degreased bran supply system while vibrating. This is the same behavior as the vibration feeder adopted in Japanese Patent No. 47384427 proposed by the present inventor.

[Other Example 1 of Degreasing Bran Regenerating Device]
FIGS. 8 and 9 show examples of other degreasing bran regenerating devices.
The degreasing bran regenerating device 3 is an example in which a perforated tubular body 73 and a rotary inclined plate 74 are provided as an internal mechanism of the tubular sieve 7. Other mechanisms such as the outer cylinder 6 are common to the above (FIG. 6). An example of the tubular sieve 7 of this example is shown in FIG.
The perforated cylinder 73 is attached to the inside of the cylindrical sieve 71 attached to the rotating shaft 31, and the rotating inclined plate 74 is attached below the perforated cylinder 73. A blind portion 72 is formed on the lower peripheral surface of the cylindrical sieve 71.
The perforated tubular body 73 has a smaller diameter and a shorter length than the cylindrical sieve 71. The holes provided in the perforated cylinder 73 are larger than the mesh of the cylindrical sieve 71, and are formed in a size that allows the degreased bran to sufficiently pass through. The perforated cylinders 73 may be provided in a plurality of positions. A wire mesh mesh material is suitable for the perforated cylinder 73.
The rotary tilt plate 74 has a conical umbrella shape and is attached to the rotary shaft 31. In the illustrated example, three sheets are provided, but one to several sheets can be provided.

The perforated tubular body 73 and the rotary inclined plate 74 are mechanisms for loosening and separating the powder or granular material E that passes through the inside of the cylindrical sieve 71 downward. Since the powder or granular material E contains sticky skin bran or the like, the degreased bran tends to form a dumpling-like mass. This lump causes clogging of the cylindrical sieve 71 and drops quickly, which also deteriorates the quality of the regenerated degreased bran. The perforated tubular body 73 and the rotary inclined plate 74 are responsible for the preliminary action of loosening the mass, breaking it apart, and sieving it.
The powder or granular material E collides with the perforated tubular body 73 by the wind flowing from the blower portion 61 toward the suction portion 62, and is separated. Further, the lower rotary inclined plate 74 is pushed up while rotating on the blower side, and rolls down on the leeward side to be disassembled. By such an action, unnecessary fine powder is removed from the powder or granular material E, and the quality of the regenerated degreased bran G is improved.

[Other Example 2 of Degreasing Bran Regenerating Device]
Further, FIG. 10 shows an example of another degreasing bran regenerating device provided with a tubular sieve 7.
This is an example in which a perforated tubular body 73 is provided as an internal mechanism of the tubular sieve 7. Other mechanisms such as the outer cylinder 6 are common to the above. A perforated cylindrical body 73a is attached to the inside of the cylindrical sieve 71 attached to the rotating shaft 31. A blind portion 72 is formed on the lower peripheral surface of the cylindrical sieve 71.
The perforated cylinder 73a has a plurality of layers of cylinders having a diameter smaller than that of the cylindrical sieve 71. The holes provided in the perforated cylinder 73 are larger than the mesh of the cylindrical sieve 71, and are large enough to allow the degreased bran to pass through. The hole of the inner perforated cylinder is made larger to increase the number of times the powder or granular material E collides with each other, and the loosening effect is improved.
In this example, one perforated cylinder 73 is shown, but a plurality of perforated cylinders 73 may be used.
The cylinder is easy to manufacture and easy to maintain. A wire mesh mesh material is suitable for the perforated cylinder 73.

[Other Example 3 of Degreasing Bran Regenerating Device]
FIG. 11 shows an example in which the degreasing bran regenerating device 3 is provided with a rotary inclined plate 74 as an internal mechanism of the tubular sieve 7. A cross-sectional view of the degreasing bran regenerating device 3 is shown in (a), and an example of a rotary inclined plate is shown in (b).
A plurality of rotary inclined plates 74 are arranged inside the cylindrical sieve 71 and attached to the rotary shaft 31. A blind portion is formed on the lower peripheral surface of the cylindrical sieve 71.
The rotary inclined plate 74 is pushed up while rotating on the blower side, and rolls down on the leeward side to perform a loosening action on the powder or granular material E.
The rotary inclined plate 74 shown in FIG. (B) is a conical shape provided with a large number of holes. The size of the holes should be about the size of the defatted bran to be regenerated, or smaller than the defatted bran. Complex air flow due to rotation such as blowing up and suction affects the powder or granular material E, and the loosening effect is improved in addition to the rolling of the surface. Alternatively, a small protrusion may be provided on the surface to give a collision action, or may be used in combination with a hole.

[Defatted bran supply system]
The defatted bran regenerated from the shifter 36 is supplied to the defatted bran supply system. New degreased bran is replenished on the way. The frying bran cylinder 41 used in the degreasing bran supply system (see FIG. 1) can use a conveying means or the like using the rotation of a spiral shaft inside the pipe. In addition, as a feeding device for degreasing bran, a device used for transporting grains used in a rice milling device or the like can be used.
Since the degreased bran is consumed, a new degreased bran H is supplied to the regenerated degreased bran G from the new degreased bran storage tank 43. The supply amount can be controlled by the level sensor 45 provided in the degreasing bran hopper 42, or the regenerated degreasing bran G supplied from the shifter 36 can be detected and the shortage of new degreasing bran H can be added. The new defatted bran mixing mechanism 44 for replenishing these new defatted bran H can utilize the techniques disclosed in Japanese Patent No. 4738427 and Japanese Patent No. 5261294 that have already been proposed.
For example, the new degreasing bran mixing mechanism disclosed in Japanese Patent No. 47384427 is shown in FIG. 8 as an example. This exemplary mechanism will be provided during the transfer from the shifter 36 to the winnowing cylinder 41. Detailed explanation will be omitted.

[Rice milling system]
The rice milling A supplied to the rice polishing tank 1 is supplied from the rice milling supply system 200. The rice milling supply system 200 includes a rice milling storage tank 53, a grain raising cylinder 51, and a rice milling hopper 52 for temporary storage provided above the rice milling tank 1. In the present invention, the rice bran sorting tank 1, the rice bran sorting sieve 2, and the degreasing bran regenerating device 3 are vertically connected in series, but since the rice bran tank 1 is kept low, the rice milling A is placed in the rice bran tank 1 from below. The fried grain cylinder 51 to be sent upward can also be short. Although it depends on the amount of rice milled, the upper end of the rice milling tank is suppressed to 3 m or less, preferably 2 m or less, avoiding high-altitude work and high-altitude management, and realizing ease and safety of work.

[Quality of clean rice]
The water turbidity of washed rice produced by the method for producing clean rice previously proposed by the applicant is disclosed in, for example, Japanese Patent No. 47384427 (see Tables 1 and 2 of Patent Gazette). It was about 59 to 74. The turbidity of the washed water obtained by performing the clean rice finishing process of the present invention once washed with water has sufficiently reached the non-washed rice standard, and it becomes about 20 ppm depending on the management of the apparatus. It was found that the degree of purification was improved.

A ... Rice milling B ... Degreased rice bran C ... Polished rice processed product D ... Raw clean rice E ... Powdered grain F, F2 ... Clean rice (F2: Fresh clean rice)
F1 ・ ・ ・ Clean rice G ・ ・ ・ Recycled degreased rice bran H ・ ・ ・ New degreased rice bran I ・ ・ ・ Waste rice J1 ・ ・ Fine powder such as skin bran J2 ・ ・ Fine powder such as skin bran

1 ... Rice polishing tank 10 ... Tank 11 ... Rotating shaft 12 ... Rice polishing shaft rotating motor 13 ... Resistor 14 ... Rice polishing rod 15 ... Input port 16 ... Discharge port

2 ... Rice bran sorting sieve 21 ... Perforated cylinder 21a-Perforated material 21b-Hole 22 ... Blower mechanism 23 ... Rotating shaft (blower)
24 ... Perforated cylinder squeezing end 25 ... Housing 26 ... Rice feeding cylinder 27 ... Rotating plate 28 ... Accepting hopper 29 ... Lower opening

3 ... Degreasing bran regeneration device 31 ... Rotating shaft 32 ... Motor 33 ... Input port 34 ... Bottom plate 35 ... Discharge port 36 ... Shifter

41 ... Fried bran cylinder 42 ... Degreased bran hopper 43 ... New degreased bran storage tank 44 ... New degreased bran mixing mechanism 45 ... Level sensor

51 ... Winnowing cylinder 52 ... Rice milling hopper 53 ... Rice milling storage tank

6 ... Outer cylinder 60 ... Housing 61 ... Blower 62 ... Suction 63 ... Crosswind

7 ... Cylindrical sieve 71 ... Cylindrical sieve 72 ... Blind part 73 ... Perforated tubular body 74 ... Rotating inclined plate


1000 ・ Rice polishing device 100 ・ ・ ・ Rice polishing device 200 ・ ・ ・ Rice milling system device 300 ・ ・ ・ Degreasing bran supply system device 400 ・ ・ ・ Clean rice finishing system device 500 ・ ・ ・ Waste

101 ・ ・ ・ Rice polishing machine 110 ・ ・ ・ Rice polishing part 111 ・ ・ ・ Pressurizing part 112 ・ ・ ・ Pressurizing rod 401 ・ ・ ・ Fine powder removing device 402 ・ ・ ・ Humidifying fine powder removing device


411 ... Air transport cylinder 412 ... Suction fan 415 ... Relay cylinder 416 ... Clean rice feed cylinder 417 ... Rice receiving hopper 420 ... Water mist generator 421 ... Water mist 422 ...・ ・ Air 423 ・ ・ ・ Nozzle 424 ・ ・ ・ Compressor 425 ・ ・ ・ Water mist air

430 ... Dust collector 431 ... Dust collection bag 432 ... Dust collector 441 ... Air transport cylinder 442 ... Suction fan

480 ... Clean rice tank

Claims (6)

A rice finishing device that removes fine powder from milled or polished rice grains.
A transport cylinder that air-conveys rice grains from the bottom to the top, a free fine powder removal device provided with a dust collector at the top of the air transport cylinder, and
A transport cylinder for air-transporting rice grains from the bottom to the top, which is provided in a subsequent process of the free fine powder removing device, a water mist supply device provided below or below the transport cylinder, and an upper portion of the transport cylinder. Adhesive fine powder removal device equipped with a dust collector
Rice finishing device equipped with. The rice finishing device according to claim 1, wherein the rice grains are rice grains of clean rice, which is a clean rice finishing device. It is a rice polishing tank in a rice polishing device using defatted bran as a rice polishing material. The rice polishing tank has a pressurizing part on the inlet side and a continuous rice polishing part on the pressurizing part.
The pressurizing part is equipped with a plurality of pressurizing rods inclined to the rotating shaft.
In the rice polishing section, a rice polishing container provided with a resistor extending from the inner wall and a rotating shaft to which a rod-shaped rice polishing rod is attached are provided in the rice polishing container.
A rice polishing tank characterized in that the resistor and the rice polishing rod are arranged so that they can move relative to each other at intervals through which grains can pass. It is a rice polishing device equipped with a rice polishing system device, a rice milling system device, a degreasing bran supply system device, and a clean rice finishing system device.
Equipped with a rice polishing tank equipped with a pressurizing part as a rice polishing device
The rice polishing system is characterized by being equipped with a free fine powder removing device equipped with an air transport cylinder equipped with a dust collector, a water mist supply device on the lower side, and an adhering fine powder removing device equipped with a dust collector on the upper side. apparatus. The rice polishing device has a rice bran sorting sieve installed at the rice bran sorting tank and the discharge port of the rice bran tank, and the degreasing bran supply system device has a degreasing bran recycling device immediately after the rice bran sorting sieve.
The rice polishing apparatus according to claim 4, wherein the rice polishing tank, the rice bran sorting sieve, and the degreasing bran regenerating apparatus are all vertically rotating type. A process of mixing milled rice with defatted bran and applying a rubbing rice polishing treatment to separate fine powder such as skin bran adhering to the milled rice and separating it from the defatted bran to produce unclean rice.
A process of removing free fine powder by air-transporting unclean rice from the bottom to the top and collecting the free fine powder scattered in the transport flow.
Adhesive fine powder removal process, in which water mist is sprayed on clean rice from which free fine powder has been removed, air is transported from below to upward, and the adhered fine powder separated during transport is collected.
A method for producing clean rice, which is characterized by being equipped with.

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