JPS60257841A - Rice refining method and apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to improvements in rice milling methods and equipment.

Generally, the grain temperature of polished rice immediately after being milled to a predetermined degree of polishing using a rice milling device increases to about 5℃ to 38℃,
In addition, since the adhering bran remains on the rice grain surface, if the polished rice is stored as it is in a grain tank etc., the rice grain surface (adhesive bran) will remain.
The quality of rice grains may deteriorate due to mold or pests, etc.
In addition, due to the rice temperature, the water content of the rice grains evaporates and dries, resulting in poor taste.

In view of the above points, the present invention has been developed by humidifying and tempering white rice milled to an arbitrary predetermined degree of polishing to appropriately correct the moisture content and rice temperature of the rice grains described above, and polishing the softened rice grain surface. It is an object of the present invention to develop and provide a rice milling method and apparatus for improving the quality of rice grains by processing the rice into high-quality polished rice with a glossy surface free from adhesion of bran.

The present invention will be explained with reference to embodiment figures. The drawing shows a rice polishing apparatus in which a rice polishing apparatus 1 is provided in the previous process and a humidification conditioning apparatus 2 using moist air is provided, and a polishing apparatus 3 is provided in the subsequent process to form an integrated rice polishing process.

The rice polishing device 1 has a polishing chamber 7 in which a friction polishing trochanter 5 is mounted on a main shaft 6 consisting of a ventilation tube shaft inside a perforated wall polishing cylinder 4.
In addition, the whitening chamber 7 is provided with a rice feeding port 9 communicating with the supply hopper 8 and a rice discharging port 11 equipped with a pressure lid 10, so that the polished rice discharged from the rice discharging port 11 of the whitening chamber 7 is disposed of. It is formed to be supplied to the humidification conditioning device 2 via the fried grain 8112, and 13 is a bran removal chamber 1 provided on the outer periphery of the porous-walled whitening cylinder 4.
This is the exhaust fan connected to No. 4.

The humidification conditioning device 2 is provided with a grain supply port 16 in the upper part of the machine frame 15 and a grain discharge port 17 in the lower part thereof, and has an exhaust chamber 18 in the grain flow path inside the machine frame 15. A ventilation passageway 19 that communicates with the air supply room 20
1 and are arranged in multiple stages and rows by opening up and down,
The air supply chamber 20 is a fog generator via a feed pipe 22.

The grain discharge port 17 is connected to a moist air generator 23 consisting of a blower, etc., and the grain discharge port 17 is provided with a switching valve 24, and branch passages 25 and 26 are connected to each other. The other branch path 26 connects to the grain frying machine 27 to circulate the grains in the tempering device 2.
The structure is such that the grains can be fed to the polisher 8 and 3.

The polishing device 3 has a polishing chamber 31 by horizontally suspending a polishing body 30, which is a cylindrical body having a plurality of polishing band-shaped supports 29 disposed around it, inside a box-shaped machine frame 28. A porous wall tube 32 for removing rice bran is provided on the outer periphery of the polishing body 30, and a rice bran receiving trough 33 is installed at the lower part thereof, and a screw conveyor 34 for discharging is rotated inside the rice bran receiving trough 33. A supply hopper 35 is provided on one side of the polishing chamber 31, and a discharge port of the grain lifting machine 27, which is connected to the hopper 35 and the branch passage 26 of the humidification and tempering device 2, is connected by a flow passage 36. 37 is a rice discharge port provided on the other side of the polishing chamber 31;
8 is a rice bran discharge port.

With the above-mentioned configuration, the brown rice flowing into the milling chamber 7 from the supply hopper 8 is subjected to the milling action by the rotation of the milling trochanter 5, and the bran powder generated thereby is discharged through the holes in the porous-walled milling tube 4. The white rice that has been produced and removed from the machine by 1fi13 and milled to an arbitrary predetermined level of polishing is sent to the discharge port 11.
At the same time, the grains are fed through the grain supply port 16 into the humidification and tempering device 2 for the next step by the grain lifting machine 12 installed next to the grains. The polished rice in the humidification conditioning device 2 is placed in a tank vertically.
The polished rice flows down in a zigzag pattern between the ventilation passages 19 and the picture style passages 20, which are arranged in a zigzag manner, and the grains are supplied via the branch passage 25 and the grain frying machine 12. It is returned to the port 16 and circulated within the tank. Meanwhile, the humid air consisting of fog generated by the fog generator of the humidification conditioning device 2 humidifies the polished rice flowing down the grain flow path in the tank in a zigzag pattern from the air supply chamber 20 through the supply passage 21. At the same time, the discharged air is discharged from the exhaust passage 19 to the outside of the machine via the exhaust chamber 18. This humidification conditioning action cools the white rice, whose temperature has risen to about 5°C to 38°C due to the milling action of the rice milling device 1, to about room temperature, and also cools the rice to about room temperature by 0.2% to 0.3% % weight ratio is circulated and tempered while humidifying over a period of 30 minutes to 1 hour, and is carried out in order to produce polished rice of any predetermined moisture content without cracking the rice grains. The polished rice whose grain surface has been moistened and softened by the humidification and conditioning action is discharged through the branch passage 26, and is also discharged from the grain frying machine 2 located next to it.
7 to the polishing device 3. The polished rice that has flowed into the polishing device 3 is polished by a plurality of belt-shaped branches 29 as the polishing body 31 rotates, removing the adhering bran and polishing the exposed hard surfaces of the rice grains. As a result of this action, the rice is finished with a beautiful glossy surface and is discharged from the rice discharge port 37 to the outside of the machine. In addition, the peeled rice bran powder flows down and accumulates in the rice bran receiving trough 33, and the rice bran powder is collected in the rice bran receiving trough 33.
4, the polished rice is removed from the machine through the rice bran discharge port 38, and the polished rice taken out of the machine is entrusted to the next process.

The humidification and conditioning device 2 is not limited to the configuration shown in the drawings, and any general humidification and conditioning means may be selected and used, and the polishing material of the polishing device 3 may include cloth pieces, brush bodies, In some cases, a helical rotating body equipped with stirring blades is used as the polishing body. - A grain tank may be provided in the communication process of each of the above-mentioned apparatuses 1, 2.3 in the rice polishing process to adjust the throughput of humidification and tempering or polishing.

In addition, in the humidification conditioning device 2, the machine frame 15 that is in contact with the outside air
Condensation water often forms on the inner wall surface, and the condensation water causes a plurality of rice grains to form lump-like granules, which may mix into the product and cause quality deterioration, but with this device,
Since the humidified rice grains reliably pass through the polishing device 3 provided in the post-process, nodule-like grains are reliably broken down and polished, so that the damage caused by condensed water on the rice grains as described above can be completely prevented, and This has the effect of constantly and stably securing high-quality polished rice with a glossy surface.

As described above, the rice milling method and apparatus of the present invention moisturizes and refines polished rice to an arbitrary predetermined degree of polishing, so the moisture content and ice temperature of the rice grains described above are appropriately corrected to prevent cracks in the rice grains and improve taste. Deterioration can be completely prevented, and since the softened rice grain surface is polished, the attached bran is removed and the hard surface of the rice grain is polished to produce high-quality polished rice with a glossy surface, improving the quality of the rice grains. It has the following effects.

[Brief explanation of drawings]

The drawing shows an embodiment of the present invention, and is a partially cutaway side view of the device. 1... Rice polishing unit N 2... Humidification conditioning device 3... Polishing device 4... Porous wall polishing tube 5... Friction polishing trochanter 6
... Main shaft 7 ... Milling room 8 ... Supply hopper 9 ... Rice feeding port 10 ... Pressure lid 11 ... Rice discharge port 12 ... Grain lifting machine 13 ... Ventilation fan 14 ... Bran removal chamber 15 ... Machine frame 16 ... Grain supply port 17 ... Grain discharge port 18 ... Ventilation chamber 19 ... Ventilation passage 20.
...Air supply room 21...Picture passageway 22...Fleet pipe 23...Damp air generator 24...Switching valve 25...
Branch road 26... Branch road 27... Grain lifting machine 28... Box-shaped machine frame 29... Strip-like branch for polishing 30... Polishing body 31... Polishing chamber 32
... Porous wall tube for removing bran 33 ... Reception trough for bran discharge 34 ... Screw conveyor for discharge 35 ... Supply hopper 36 ... Downflow path 37 ...
Rice discharge port 38...Branch discharge port patent applicant Satake Seisakusho Co., Ltd. □

Claims (2)

[Claims] (1) A rice polishing method characterized in that polished rice polished to an arbitrary predetermined degree of polishing is humidified and tempered, and then the rice grain surface is polished to produce polished rice with a glossy surface. (2) A rice polishing processing device characterized in that a rice polishing device is provided in the previous step and a polishing device is provided in the subsequent step of the humidification conditioning device using moist air to form an integrated rice polishing process.