JPS6137987B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a rice polishing method and apparatus particularly suitable for polishing sake-brewing rice.

BACKGROUND OF THE INVENTION It is already known to obtain polished rice by sequentially performing a plurality of grinding rice milling operations.

In this case, each grinding rice milling operation generates heat, which increases the humidity of the rice grains and causes them to dry out. In particular, in the polishing of sake-brewing rice, a large number of grinding-type rice milling operations are performed in sequence until the yield rate is extremely low, which generates a lot of heat and causes severe drying, resulting in poor milling efficiency and increased burden on each rice milling operation. The amount of rice fluctuates, resulting in broken rice due to drying. Also,
At the end of rice milling, milled rice has a desirable moisture content of 14% to 16%.
If a large amount of water is added in an attempt to improve the quality of the rice, it will cause cracks in the polished rice and its quality will deteriorate.

Problems to be Solved by the Invention The first aspect of the invention eliminates the above-mentioned drawbacks, suppresses changes in the moisture content of rice grains during each grinding rice milling operation as much as possible, and makes the load of each grinding rice milling operation approximately constant. It is also intended to prevent the occurrence of broken rice caused by the temperature rise of polished rice during grinding rice milling operations.

A second object of the present invention is to provide a series of rice milling apparatuses for achieving the above object.

Furthermore, the third object of the present invention is to provide a rice milling apparatus that is further simplified in order to achieve the above object.

Means for Solving the Problems The first aspect of the present invention is a rice milling apparatus that sequentially performs a plurality of grinding and rice milling operations, and is characterized in that the rice grains are cooled and humidified between each grinding and rice milling operation. It has the following.

The second aspect of the present invention is a rice polishing apparatus in which a plurality of grinding rice polishing machines are arranged in series, and a rice grain cooling humidifier is disposed between each of the grinding rice milling machines. It has a configuration.

Furthermore, the third aspect of the present invention is a rice milling device in which a rice grain discharge section of a grinding type rice milling machine is connected to a rice grain supply port of the grinding type rice milling machine, in which a gap between the rice grain discharge section and the rice grain supply port is provided. It has a configuration characterized by the arrangement of a rice grain cooling humidifier.

Embodiment An embodiment of the second rice milling apparatus of the present invention that implements the first rice milling method of the present invention will be described with reference to FIG.

1 is a grinding rice polishing machine, and as is well known, there is a rice grain supply port 2 at the top, a porous-walled rice polishing cylinder 3, and a grinding rotor 4.
It consists of a whitening room 5 which is formed by rotatably forming a whitening room 5.

A plurality of these grinding rice polishing machines 1 are arranged in series, and a rice grain cooling humidifier 6 is disposed between each of the grinding rice milling machines 1.

The rice grain cooling humidifier 6 has an open part 7 by opening the lower end.
A flow bed 9 consisting of a wall body with a closed part 8 bent at the upper end is arranged in multiple rows and stages, and is placed alternately up and down in a container 12 with a supply port 10 at the top and a discharge port 11 at the bottom. The lower end open parts of the flowbeds 9 in every other stage are connected to an air supply device 14 having a blower 13 via an air supply part 15, and the lower end open parts of the remaining flowbeds 9 are connected to an exhaust part 16. death,
The discharge port 11 is connected to the rice grain supply port 2 of the grinding rice mill 1.

The air supply device 14 is provided with a heat exchanger 18 of an air cooling device 17 and an air humidifier 19, and its air passage is open and communicated with the rice grain passage between the flowbeds 9 of the rice grain cooling humidifier 6.

A moisture meter 20 is provided at the discharge port serving as a rice grain passage between the rice grain cooling humidifier 6 and the subsequent rice milling machine 1, and this moisture meter 20 is connected to the air humidifier 19 of the rice grain cooling humidifier 6. has been done.

Reference numeral 21 denotes a grain lifting machine that connects the polished rice discharge section 22, which is a rice grain discharge section of the grinding rice milling machine 1, with the supply port 10 of the rice grain cooling and humidifying machine 6.

Next, to explain its function, first, the rice grains supplied to the rice grain supply port 2 of the grinding rice milling machine 1 are transferred to the milling chamber 5.
The rice is ground and polished inside by the rotation of the grinding rotor 4, and the generated bran is discharged to the outside from the porous-walled bran removal and polishing cylinder 3, and the polished rice is transferred from the polished rice discharge section 22 to the grain lifting machine 21.
The rice grains are sent to the supply port 10 of the rice grain cooling humidifier 6 through the rice grain cooling humidifier 6.

The rice grains supplied from the supply port 10 to the rice grain cooling humidifier 6 are separated by the upper end closing portion 8 of the plurality of flow beds 9 as they descend through the rice grain cooling humidifier 6, and are cooled by the air cooling device 17. The air is humidified by the air humidifier 19, stirred, cooled and humidified by the cooled and humidified air supplied from the lower end openings of the plurality of alternately arranged fluidized beds 9, and then discharged from the discharge port 11.

The air that is supplied from a plurality of alternately arranged flowbeds 9 and has finished cooling and humidifying the rice grains is discharged to the outside from the exhaust section 16 via the lower end opening 7 of each of the remaining flowbeds 9. In this cooling device, the rice grains are cooled while being sufficiently stirred while flowing down, so that the whole grain is cooled uniformly.

The rice grains cooled and humidified by the rice grain cooling humidifier 6 and discharged from the discharge port 11 are supplied to the rice grain supply port 2 at the top of the grinding rice mill 1, and are ground in the milling chamber 5 by the rotation of the grinding rotor 4. Be refined. The bran generated at this time is discharged through the porous-walled bran removal and polishing tube 3, and the rice grains are polished. This polished rice is sent from the polished rice discharge section 22 through the grain lifting machine 21 to the next rice grain cooling and humidifying machine 6, where the same rice grain cooling and humidification and grinding and rice polishing are performed.

At this time, a moisture meter 20 installed in the rice grain passage between the rice grain cooling humidifier 6 and the subsequent grinding rice polishing machine 1 is used.
The water content of the milled rice that has been cooled and humidified and enters the grinding rice milling machine 1 is measured, and the air humidifier 19 of the rice grain cooling humidifier 6 is operated so that the moisture content becomes a moisture ratio of 14% to 16%. Adjust.

FIG. 2 shows an embodiment of the third rice milling apparatus of the present invention for carrying out the first rice milling method of the present invention, and the grinding rice milling machine 1 and the rice grain cooling humidifier 6 are the same as those in FIG. 1. However, the polished rice discharge section 22 of the grinding rice polishing machine 1
The supply port 1 of the rice grain cooling and humidifying machine 6 is connected to the grinding rice milling machine 1 through the grain lifting machine 21 through its discharge port 11.
0 was contacted.

Therefore, in this invention, the milled rice discharged from the grinding rice milling machine 1 is cooled and humidified by the rice grain cooling humidifier 6 and then supplied to the original grinding rice milling machine 1. It circulates through the cooling humidifier 6.

Effects of the Invention As described above, the rice milling method according to the first aspect of the present invention is a rice milling method in which a plurality of grinding and rice milling operations are sequentially performed, in which rice grains are cooled and humidified between each grinding and rice milling operation. This feature suppresses changes in the moisture content of rice grains during each grinding and milling process as much as possible, and also keeps the load of each rice milling constant, thereby preventing the occurrence of broken rice caused by the temperature rise of the polished rice during the rice milling process. This makes it possible to obtain high-quality polished rice that is particularly suitable for sake-brewing rice.

In particular, the present invention is suitable for polishing sake-brewed rice, which requires polishing to an extremely low yield rate, without causing broken rice, unlike friction-type rice polishing, by polishing rice by grinding. It is.

Further, the second rice milling device of the present invention is characterized in that in the rice milling device in which a plurality of grinding type rice milling machines are arranged in series, a rice grain cooling humidifier is arranged between each grinding type rice milling machine. In order to
The object of the third invention can be achieved with a single device, and furthermore, the third rice polishing device of the present invention replaces the rice grain discharge section of the grinding type rice polishing machine with the rice grain discharging section of the grinding type rice polishing machine. The rice milling device connected to the supply section is characterized in that a rice grain cooling and humidifying device is disposed between the rice grain discharge section and the rice grain supply section, so that the effects of the first invention and the second invention are achieved. This can be achieved with a single grinding rice polishing machine and rice grain cooling/humidifying device, and the number of parts and installation space can be reduced.

Incidentally, the grinding type rice polishing machine used in the present invention is not limited to the horizontal type shown in the above embodiment, but it goes without saying that it may be a vertical type.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an embodiment of the second invention used to carry out the first method of the present invention, and FIG. 2 is a partially cutaway front view of the embodiment of the third invention. It is a diagram. 1...Grinding rice polishing machine, 2...Rice grain discharge section, 3...
Porous wall polishing cylinder, 4...Grinding trochanter, 5...Refining chamber,
6... Rice grain cooling humidifier, 10... Supply port, 11...
...Discharge port, 19...Air humidifier, 20...Moisture meter, 22...Discharge section.

Claims (1)

[Scope of Claims] 1. A rice polishing method in which a plurality of grinding and rice polishing operations are sequentially performed, and the rice grains are cooled and humidified between each grinding and rice polishing operation. 2. The rice polishing method according to claim 1, wherein the cooling and humidification is performed to reduce the moisture content of rice grains to 14% to 16%. 3. A rice polishing device in which a plurality of grinding type rice milling machines are arranged in series in sequence, and a rice grain cooling humidifier is disposed between each of the grinding type rice milling machines. 4. A moisture meter is provided in the rice grain passage between each rice grain cooling humidifier and the subsequent grinding type rice polishing machine, and this moisture meter is connected to the air humidification device of the rice grain cooling humidifier. The rice milling device according to item 3 of the scope of the invention. 5. A rice polishing device in which a rice grain discharge section of a grinding type rice polishing machine is connected to a rice grain supply port of the grinding type rice polishing machine, characterized in that a rice grain cooling humidifier is disposed between the rice grain discharge section and the rice grain supply port. rice milling equipment. 6. Claim 5, wherein a moisture meter is provided between the rice grain cooling humidifier and the rice grain supply port of the grinding rice polishing machine, and this moisture meter is connected to the air humidification device of the rice grain cooling humidifier. The rice milling equipment described.