JPS61283358A - Germ 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] Industrial Field of Application The present invention is a method for producing germ-based rice even from ordinary brands of rice by performing pre-treatment to significantly improve the germ survival rate of rice grains in the pre-polishing process and then milling the rice. and regarding equipment.

Conventional germ polished rice is standardized to have a germ retention rate of 80% or more, and in order to ensure this standard value, it was necessary to carefully select rice with high germ retention. However, suitable rice is expensive and in absolute quantity, making it difficult to secure brown rice as a raw material. During the process, the raw brown rice is dried, and the germ part wilts and shrinks due to the release of water, and by strengthening the adhesion with the endosperm part, it prevents the germ from detaching due to the impact of the polishing action in the rice milling machine. A rice milling device for improving the germ survival rate is known as Japanese Patent Publication No. 57-29217.

In addition, a direct type cooling device is installed in a rice grain container having a rice grain supply port and a rice grain discharge port to rapidly cool the rice grains by bringing cold air into direct contact with the rice grains, and the rice grain discharge port is connected to the rice grain supply port of the grinding rice polishing machine. A grinding rice polishing device is known as Japanese Patent Application Laid-open No. 55-167054, which improves the germ survival rate by cooling the raw brown rice and milling the rice while maintaining the adhesion of the germ.

Problems to be Solved by the Invention However, in the rice milling apparatus described in Japanese Patent Publication No. 57-29217, since the temperature of brown rice rises and the surface layer of the rice grain becomes soft, the surface layer of the rice grain due to the polishing trochanter This causes deep scratches on the rice, lowering the milling yield, and roughening the grain surface, lowering the commercial value.When high-temperature polished rice comes into contact with the air, it dries and cracks, impairing the taste. This had the problem of lowering the temperature.

Furthermore, in the device disclosed in JP-A-55-167054, if the moisture content of the raw brown rice supplied to the rice grain container is high (for example, 15%), the germ will be absorbed by the impact of being ejected from the conveyor. Even if it is cooled, its effect cannot be expected, and the temperature difference between the inside and outside of the rice grain container induces dew condensation on the inner wall of the rice grain container, and the condensation wets the raw brown rice and causes the rice grains In addition to making the rice soft, water droplets that exceed the water absorption rate may cause cracks, and the germ may expand due to water absorption, or the adhesion with the endosperm may be reduced and the germ may break off due to the impact of the milling trochanter. This caused adverse effects and did not lead to a definitive improvement in germ retention.

In order to solve the above-mentioned problems, the technical object of the present invention is to provide a rice milling method and a rice milling apparatus for easily producing germinated rice with a high residual percentage using general brand rice.

Means for Solving the Problems In order to achieve the above technical problems, the germ rice polishing method of the present invention dries the rice grains to a desired moisture content in the previous step, and then cools the rice grains to harden the surface layer of the rice grains. The feature is that the rice is polished in the post-process.

Further, the germ rice milling device of the present invention is characterized by a configuration in which the rice milling device is disposed in a subsequent stage of the rice milling pre-treatment stage formed by the rice grain dryer and the rice grain cooler.

In the rice milling pre-treatment process, in which raw brown rice is dried to a desired moisture content using a rice grain dryer, and then the high-temperature brown rice is cooled down to a low temperature below room temperature using a rice grain cooler, the germ part is withered and attached to the endosperm part. Since the rice grains are fed to the rice milling equipment after strengthening their adhesion and hardening the surface layer, the germ part is not affected by the impact of the polishing trochanter, increasing the germ survival rate, and low-temperature milling improves the smoothness of the grain surface. The rice is polished to high-quality germ-white rice, and because it is milled at a low temperature, germ-white rice does not cause cracks even when exposed to air.

Example An embodiment of the present invention will be described based on FIG.

Reference numeral 1 in the figure is a rice grain dryer, in which an air drying device 2 is connected to the air outlet of a blower 3, and an air cylinder 5 is attached to one side wall 4 of a rice grain tank 7 for drying, and air is blown through the air dryer 5. A rice grain dryer 1 is formed by connecting a blower 3 through a pipe 6. Inside the rice grain tank 7, a plurality of porous walls 8 for ventilation are installed at appropriate intervals, and the picture style room 9... is provided with a picture style 1i! A drying chamber 12 is provided between the air exhaust chamber 11 .
A rotary valve 13 for controlling the outflow of rice grains is rotatably mounted on the bottom of the drying chamber 12, and a rotary valve 13 for controlling the outflow of rice grains is rotatably mounted at the end of the receiving gutter 15 of the conveyor 14 for conveying the outflowing rice grains. A downflow gutter 16 is connected, and the downflow gutter 16 is connected to a grain lifting machine 17. A three-way switching valve 18 is provided at the discharge port of the grain lifting machine 16, one flow path 19 is connected to the rice grain tank 7 for drying, and the other flow path 2 is connected to the rice grain tank 7 for drying.
0 is communicated to the grain frying machine 22 for the rice grain cooler 21 in the next process. A cold air supply chamber 25 is provided on one side wall 24 of the rice grain tank 23 for cooling.
Air cooling device 2 equipped with a humidifier and an air cooler
6 and the picture room 25 are connected by a cold air pipe 2. Inside the rice grain tank 23, chevron vein cold air supply troughs 28 and chevron vein exhaust pipes 29 are arranged alternately in parallel in multiple stages, and an air exhaust cylinder 30 is attached to the other side wall of the rice grain tank 23. It is connected to the exhaust fan 29. A discharge gutter 31 provided at the bottom of the rice grain tank 23 is connected to the grain lifting machine 22, a three-way switching valve 32 is provided at the discharge port of the grain lifting machine 22, and one flow path 33 is connected to the rice grain tank 23,
The rice grain dryer 1 and the rice grain cooler 21 form a rice milling pretreatment process.

Rice grain cooling tanks 35A, 35B, and 35C are connected to the rice grain supply parts of the rice mills 1fi 36A, 36B, and 36C of the rice milling device, and the tanks 35A, 35B.

Cold air blowing pipe 40D connected to 35C and air cooling device 26
and are connected to each other through cold air supply pipes 40A, 40B, and 40C. The rice polishing machines 36A and 36B have the same configuration, and a polishing trochanter 42 formed by a grinding wheel is mounted inside a porous wall bran removing cylinder 41 to form a grinding type polishing W43.
A polishing trochanter 45 made of an oval iron roll is mounted on the shaft inside a porous-walled bran removal cylinder 44 to form a friction type polishing chamber 46, and a blower 37A is installed in each of the rice polishers 36A and 368.36C. , 37B.

There are water tanks 39 in wind pipes 38A, 3.8B, and 38C of 37C.
A, 398, 390 are connected by a water pipe. In addition, wind pipes 38A, 38B, and 38C are connected to cold air pipes 47A, 47, and 4.
70 and is connected to the air cooling device 26 via the cold air blowing pipe 39. The blowing sides of the blowers 37A and 37B are communicated with the grinding type whitening chamber 43, and the blowing side of the blower 1137c is communicated with the friction type whitening chamber 46.

A grain lifting machine 48A that connects the other side flow path 34 of the three-way switching valve 32 to the rice grain cooling tank 35A via a downflow gutter 50A.
Contact us and have your rice polished! The rice grain discharge passage 49A of 136A is connected to the grain lifting machine 48B, and the rice grain discharge passage 49B of the rice milling machine 36B is connected.
is communicated to the grain lifting machine 48C, and the grain lifting machine 48B is connected to the downflow gutter 50B.
The grain lifting machine 48G is connected to the rice grain cooling tanks 35B and 350, respectively, via a downflow gutter 50C, thereby forming an integrated rice milling device.

The operation of the above embodiment will be explained below. The raw brown rice is supplied to the rice grain dryer 1 from the grain lifting machine 17, and the raw rice is supplied from the air drying device 2 to the air pipe 6. Picture style cylinder 5. Dry air is ventilated through the brown rice in the drying chamber 12 through the air supply chamber 9 to dry the brown rice, and the exhaust air is passed from the ventilation chamber 11 to the ventilation barrel 1.
0 and is discharged outside the machine. Drying chamber 12... The brown rice that has been subjected to the drying action from inside is discharged in predetermined amounts by rotation of the rotary valve 13, and the brown rice discharged into the receiving gutter 15 is conveyed to the conveyor 14.
The unpolished rice is collected from the downflow gutter 16 and supplied to the grain lifting machine 17. If the brown rice discharged from the drying chamber 12 has not reached the desired moisture content, it is circulated through the flow path 19 to the rice grain dryer 1 via the three-way switching valve 18 and dried to the desired moisture content. When the brown rice is in the flow path 2, the three-way switching valve 18 is operated.
0 to the rice grain cooler 21 via the fried grains 11122. In the rice grain cooler 21, the air cooled by the air cooling device 26 is blown to the cold air supply gutter 28 through the cold air pipe 27 and the painting room 25, and the air is sent to the supply gutter 28 to the brown rice layer in the rice grain tank 23 for cooling. The brown rice heated to high temperature by the rice grain dryer 1 is cooled by circulating cooling air through the exhaust air TA29 from the air exhaust machine TA29. The brown rice that has been discharged outside the machine via the exhaust cylinder 3o is discharged from the discharge gutter 31 to the grain lifting machine 22, and if the cooling temperature of the brown rice has decreased to the desired temperature, the three-way switching valve 32 is operated. It is connected to the grain lifting machine 48A of the rice milling device for the next process through the flow path 34. Brown rice whose temperature has not lowered to the desired temperature is again supplied to the rice grain cooler 21 through one flow path 33.

In addition, when rapidly cooling high-temperature brown rice, cracks may occur in the rice grains, so if necessary, use the air cooling device 26.
Humidifiers may be turned on to introduce trace amounts of moisture into the cooling air.

In the rice milling pre-processing process using the rice grain dryer 1 and the rice grain cooler 21, for example, when brown rice with a moisture content of 14% is dried to a moisture content of 13%, water mainly evaporates through the germ part, and therefore the germ part As the endosperm withers and shrinks, its adhesion to the endosperm strengthens. Brown rice with improved survivability in the dryer 1 has a soft grain surface due to the high brown rice temperature, so when the brown rice is cooled in the rice grain cooler 21, the grain surface becomes soft as the brown rice temperature decreases. hardens.

By drying and cooling the brown rice in this way, the germ raw material brown rice can be obtained in a rice milling machine by avoiding degermination when subjected to impact from the polishing trochanter of the rice milling machine or the grain lifting machine.

Brown rice processed through the rice milling pre-treatment process is aged 1148A.
The cooling air from the air cooling device 26 is sent to the cooling tank 35A through the cold air blowing pipe 40D and the cold air supply pipe 40A.
Aerate the flowing brown rice. The brown rice supplied to the grinding type milling chamber 43 of the rice milling machine 36A is stripped of the surface bran by the milling trochanter 42, and the cooling air generated by the air cooling device 26 is passed through the cold air blow pipe 40D, the cold air pipe 47A, and the wind pipe 38A. The blower 37A blows air into the grinding type whitening chamber 43, and the air suppresses the heat generation of the rice grains and discharges the peeled bran to the outside of the porous-walled bran removing cylinder 41. In the rice milling machine 36B, the polishing degree is improved by the same action, and the rice grains supplied from the grain lifting machine 48C to the rice grain cooling tank 35C are transferred to the rice grain cooling tank 35C.
Friction type milling of rice milling machine 36G ff146 after being cooled in C
The stirring action of the milling trochanter 45 and the cold air blowing pipe 4
00. Along with the cold air sucked from the cold air pipe 47G, the water tank 39C
Moisture is added to the rice grains by the blower 37C and a blast of air blown into the friction polishing chamber 46 to humidify the fine powder adhering to the surface of the rice grains, making it easier to separate from the rice grains, and the polishing trochanter 45 The rice grains are stirred and polished to a smooth surface, and the peeled bran is discharged to the outside of the bran removing cylinder 44 with a porous wall.

During the above-mentioned rice polishing process, the brown rice is dried in the pre-polishing process, the germ part is shriveled and collapsed towards the endosperm part, so it is not affected by the impact of the polishing trochanter and the germ does not separate. Because the rice grains are cooled, the heat generated during the milling process is suppressed, and because they are hardened, they are polished to a smooth surface by the milling trochanter. Conventionally, the grain density in the milling chamber is increased by the release of water that accompanies the heat generation during milling. In addition, since the rice is milled at a low temperature and discharged outside the milling machine, it does not dry out even when exposed to air, so there is no accident of cracking, and the glossy surface with no bran adhesion is highly polished. It is possible to produce high-quality germ rice with a residual germ rate.

Note that a small amount of moisture is removed from water tanks 39A and 39B by a blower 37 to the rice grains being polished in the rice milling machines 36A and 36B.
It may be supplied from A or 37B.

Next, another embodiment of the rice milling pretreatment process of the present invention will be described based on FIG.

Inside the rice grain tank 51, a plurality of chevron-vein gutter style gutters 52 and chevron-vein wind blowers 53 are arranged alternately in parallel in multiple stages.
A wind blowing cylinder 55 is provided on one side wall 54 of the housing 1 and communicates with the blower 53, and a picture style cylinder 57 is mounted on the other side wall 56 and communicating with the picture gutter. The air conditioner 58 includes an air cooler 60 and an air dryer 61 inside an air conditioning room 59 , one end of the wind pipe 62 is connected to the blower 64 and the other end is connected to the air conditioning room 59 , and the inside of the wind pipe 62 is connected to the air blower 64 . It is formed by installing a heater 63 in the.

A switching valve 65 for switching between a cooling action and a drying action is mounted on an axis in the air conditioned room 59, and a switching actuator 66 is connected thereto.

Heater 63 of air conditioner 58. Air dryer 61° Air cooler 60. Each of the switching actuators 66 is in communication with a controller 67. The blower 64 and the picture flii 57 are connected by a blow pipe 68.

A rice temperature measuring device 69 and a moisture measuring device 70 for measuring brown rice temperature and moisture are installed at arbitrary locations on the side wall of the rice grain tank 51 and communicated with the control device 67.

A rotary valve 72 whose rotation is controlled by an electric motor 73 is provided in the rice grain discharge section 71 at the bottom of the rice grain tank 51, a switching valve 75 is installed in a branch section provided in the discharge lower 4, and an air cylinder 76 is installed in the switching valve 75. is connected. The discharge part of one branched downflow gutter 77 is connected to the grain lifting machine 78 and the rice grain tank 51 is connected by the supply gutter 79 to form a brown rice circulation process and also to the rice milling pre-processing process of drying and cooling the rice grains. It is formed. The other branched downflow gutter 80 is connected to the fried grain 1II81 for transporting brown rice to the next stage.

Next, the configuration of the control device in the above embodiment will be explained based on FIG.

The control device 67 branches the output side of the moisture measuring device 70 into three directions and connects them to input terminals of a moisture indicator 82 and a comparator 83. Further, the output side of a comparator 83, which has an input terminal connected to a moisture setting device 84 into which the moisture value at the end of drying is input, is connected to a control circuit 86 via an A/D converter 85. The output side of the rice temperature measuring device 69 is branched into three directions and a comparator 88.89
The output side of a comparator 88 connected to the input terminal is connected to the input terminal of the comparator 88 and the temperature display 87, and the high temperature setting device 90 into which the high temperature control value is input is connected to the control circuit 86 via the A/D converter 92. The output side of the comparator 89 is connected to the control circuit 86 via the A/D converter 93, and the output side of the comparator 89 is connected to the input side terminal of the low temperature setting device 91 into which the low temperature control value for stopping the cooling action is input.

Further, a drive circuit 95, 96, 97, 98° 99 is connected to the output side of the control circuit 86 connected to the arithmetic circuit 94, and an air dryer 61 of the air conditioner 58 is connected to the output side of the drive circuit 95. The switching actuator 66 is connected to the output side of the drive circuit 96, the heater 63 is connected to the output side of the drive circuit 97, and the drive circuit 9
8 has an electric motor 11173 on the output side, and a drive circuit 99.
An air cooler 60 is connected to the output side of each.

Further, the output side of the control circuit 86 connected to the timer 100 is connected to the air cylinder 76 via the drive circuit 101.

The operation of the above embodiment will be explained below with reference to FIGS. 2 and 3.

The moisture value of the brown rice supplied from the grain raising machine 78 to the rice grain tank 51 is displayed on the moisture display 82 based on the detection signal of the moisture measuring device 70, and the moisture value is compared with the moisture value input to the moisture setting device 84. control circuit 8 via the A/D converter
Contact 6. If the moisture value detected by the moisture measuring device 70 is, for example, 15% and the moisture value input to the moisture setting device 84 is 13%, the rice grain tank 51
Since the moisture content of brown rice is 13% or more, the signal inputted to the control circuit 86 is outputted to the drive circuit 95.96,
The drive circuit 95 operates the air dryer 61 to dry the rice grain tank 51.
Dry air is supplied to the interior of the interior, and the dry air is ventilated through the brown rice layer from the air gutter 52 to dry the brown rice, and the exhaust air is passed through the air exhaust gutter 5.
3... to the exhaust cylinder 55 and discharged outside the machine.

The switching actuator 66 also receives an output signal from the drive circuit 96.
, and the switching valve 65 closes the air cooler 60 side. On the other hand, the signal sent from the comparator circuit 83 to the control circuit 86 via the A/D converter 85 is sent to the arithmetic circuit 94, and in the arithmetic circuit 94, the maximum drying capacity for one pass (for example, 0.6% ) is required to be circulated through the rice grain tank 51, and the calculated value is sent to the control circuit 8.
6 to drive circuits 97 and 98, the rotation of the electric motor 73 is controlled by the output value of the drive circuit 98, the rotary valve 82 is rotated at the lowest speed, and the brown rice is discharged to the discharge lower 4.

In the arithmetic circuit 94, 1.8% is circulated three times.
It has been calculated that brown rice can be dried, and the shortage is 0.2%.
The signal sent to the drive circuit 97 activates the heater 63 to assist. Note that when the detected value of the moisture measuring device 70 that detects the moisture content of the brown rice supplied to the rice grain tank 51 is 14%, the calculation value of the calculation circuit 96 is determined by circulating the rice grain tank 51 twice to reduce the moisture content to 1%. The electric motor 73
is controlled to set the rotational speed of the rotary valve 72.

The brown rice flowing into the discharge lower 4 is circulated into the rice grain layer 51 via the downflow gutter 77 and the grain lifting machine 82, so that the brown rice moisture value detected by the moisture measuring device 70 is the same as the moisture value input into the moisture setting device 84. When the signal from the comparator 83 is communicated to the control circuit 86 via the A/D converter 85, the control device 86
The output signals from the drive circuits 95.96 and 97.99 stop the operation of the air dryer 61 and the heater 63.

The switching actuator 66 is actuated by a signal from the drive circuit 96, and the switching valve 65 closes the air dryer 61 side. Then, the air cooler 60 is activated by the output signal of the drive circuit 99, and the rice grains flowing down are ventilated and cooled during the process of circulating the cooling air from the air supply t152... to the exhaust Jill 153.

During the drying and cooling of the brown rice, the detected value of the rice temperature measuring device 69 is displayed on the temperature display 87, and the detected value is communicated to the comparator 88.89. When the rice temperature delivered to the comparator 88 is higher than the temperature value input to the high temperature setter 90, the signal is passed through the A/D converter 92 to the control circuit 86. The calculation circuit 94 is connected to the control circuit 86 . It is delivered to the air dryer 61 via the drive circuit 95 to properly control the air drying temperature. Also, a rice temperature measuring device 69 that detected the temperature of cooled brown rice.
When the comparator 89 inputs that the detected value is the same as the temperature value input to the low temperature setting device 91, the output signal is communicated to the control circuit 86 via the A/D converter 93, and the circuit 86 The control signal from the drive circuit 99 stops the operation of the air cooler 60, and when the time for brown rice to flow from the rice temperature measuring device 69 to the discharge port has elapsed, the timer 101 outputs a signal to the drive circuit 99 and the timer 100. The air cylinder 76 is actuated by the output signal, the brown rice that has been dried and cooled by the switching valve 75 flows out to the downstream 8180, and the brown rice is conveyed by the grain lifting machine 81 to the rice milling device for the next process.

FIG. 4 shows another embodiment of the present invention, in which a tempering tank 1 is installed between the rice grain dryer 1 and the rice grain cooler 21.
02 is installed, and the air exhaust cylinder 30 of the rice grain cooler 21 is connected to the air blast cylinder 103 of the tempering tank.
Since a rice grain humidifier 104 connected to a humidifier 105 is installed in the post-stroke of A, 36B, and 36G, the tempering tank 1 supplied with high-temperature brown rice discharged from the rice grain dryer 1
In 02, the brown rice in the rice grain cooling unit 21 is ventilated with cooling air, and the exhaust air is sent from the ventilation barrel 30 to the tempering tank 102 via the ventilation barrel 103, and the high temperature brown rice is ventilated and cooled, so that the rice grains are cooled. Economical effects such as shortening the time required for cooling in the container 21 and saving energy can be obtained. Further, the polished germ white rice is humidified in the rice grain humidifier 104 to prevent cracking of the rice grains in dry air or water and to improve the taste.

Please note that there is no limit to the number of rice milling machines;
Furthermore, the effects of the present invention can be achieved even if germ-polishing is performed by circulating the rice multiple times in one rice milling machine, or by milling using only a plurality of frictional rice milling machines (including a humidifying frictional rice milling machine). It is something that can be done.

Effects of the Invention As explained above, according to the germ rice milling method and germ rice milling apparatus of the present invention, the problem of difficulty in obtaining germ-friendly rice is solved, and by drying and cooling general brand rice, It can be processed into raw brown rice with a higher germ retention rate than germ-friendly rice, and the product can be milled to a high quality with a smooth grain surface, and has various effects such as increasing the germ retention rate and rice milling yield. It is something.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the overall configuration of the present invention, FIG. 2 is a side sectional view showing another embodiment of the same rice milling pre-treatment process, and FIG.
FIG. 4 is a block diagram showing the configuration of the control device of the embodiment shown in the figure, and FIG. 4 is an overall configuration diagram showing another embodiment of the present invention. 1... Rice grain dryer, 2... Air drying device, 3...
Blower, 4...-side wall, 5... Picture style cylinder, 6... Air pipe, 7... Rice grain tank, 8... Porous wall for ventilation, 9...
・Picture style room, 10...Exhaust cylinder, 11...Exhaust room, 12
... Drying room, 13... Rotary valve, 14... Conveyor, 15... Receiving gutter, 16... Downflow gutter, 17... Grain lifting machine, 18... Three-way switching valve, 19 ...Flow path, 20.
... Channel, 21 ... Rice grain cooler, 22 ... Grain frying machine,
23...Rice grain tank for cooling, 24...-side wall, 25...
・Picture room, 26...Air cooling device, 27...Cold air pipe, 28...Cold air supply gutter, 29...Exhaust fan, 30...
・Exhaust cylinder, 31...Discharge gutter, 32...Three-way switching valve,
33... Channel, 34... Channel, 35A, 35B, 3
5G...Rice grain cooling tank, 36A, 36B, 36G.
...Rice polishing machine, 37A, 37B, 37C...Blower, 3
8A, 388, 380...Wind pipe, 39A, 39B, 3
9C...Aquarium, 40A, 40B. 40C... Cold air supply pipe, 40D... Cold air blowing pipe, 4
1... Porous wall bran removal cylinder, 42... Refined trochanter, 43...
・Grinding type whitening chamber, 44... Porous wall bran removal cylinder, 45...
Refining trochanter, 46... Friction type refining chamber, 47A, 478° 470... Cold air pipe, 48A, 48B, 48C... Grain lifting machine, 49A, 49B... Discharge channel, 50A, 50B
, 50C...downflow gutter, 51...rice grain tank, 52...
Picture-style gutter, 53...exhaust tmra, 54...-side wall, 5
5... Exhaust cylinder, 56... Other side wall, 57... Picture cylinder, 58... Air cooler, 59... Air conditioning room, 60...
・Air cooler, 61...Air dryer, 62...Wind tube, 63...Heater, 64...Blower, 65...Switching valve, 66...Switching actuator, 67... ...control device, 6
8...Blow pipe, 69...Rice temperature measuring device, 70...Moisture measuring device, 71...Rice grain discharge section, 72...Rotary valve,
73... Electric motor, 74... Discharge port, 75... Switching valve, 76... Air cylinder, 77... Downflow gutter,
78... Grain lifting machine, 79... Supply gutter, 80... Downflow gutter, 81... Grain lifting machine, 82... Moisture indicator, 83...
... Comparator, 84 ... Moisture setting device, 85 ... A/D
Converter, 86...Control circuit, 87...Temperature display, 88...Comparator, 8...Comparators, 90...
・High temperature setting device, 91...Low temperature setting device, 92...A/
D converter, 93...A/D converter, 94
... Arithmetic circuit, 95, 96, 97, 98, 99...
Drive circuit, 100... Timer, 101... Drive circuit, 102... Tempering tank, 103... Air blower body, 104... Rice grain humidifier, 105... Humidifier

Claims (5)

[Claims] (1) A germ rice polishing method characterized in that rice grains are dried to a desired moisture content in a previous step, and then the rice grains are cooled to harden the surface layer of the rice grains, and the rice is polished in a subsequent step. (2) A germ rice polishing device characterized in that a rice polishing device is disposed in a process subsequent to a rice polishing pretreatment process formed by a rice grain dryer and a rice grain cooler. (3) The rice grain dryer and the rice grain cooler are a common rice grain tank, and an air drying device and an air cooling device are connected to the rice grain tank to form a rice milling pre-processing process.
2) The germ rice polishing device described in section 2). (4) The germ rice milling apparatus according to claim (3), wherein a grain lifting machine is connected to the rice milling pretreatment process to form a rice grain circulation process. (5) The germ rice milling device according to claim (2), further comprising a rice grain humidity controller disposed in a post-stroke of the rice milling device.