JPH0773490B2 - Method for producing pregelatinized rice for brewing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing pregelatinized rice for brewing which continuously produces high-quality pregelatinized rice for brewing.

[0002]

2. Description of the Related Art Conventionally, with respect to a method for producing pregelatinized rice for brewing, pregelatinized rice is produced by steaming soaked rice with a steamer and then drying the steamed rice.

[0003]

In the above-mentioned conventional method for producing pregelatinized rice for brewing, in order to dry steamed rice, aeration drying with hot air or warm air is performed. At this time, there was a problem that thermal denaturation of steamed rice due to high temperature and oxidation of steamed rice due to hot air occurred, resulting in deterioration of solubility and aroma of steamed rice during brewing. In addition, freeze-drying increased the running cost and could not be used as a raw material for brewing.

In the ordinary vacuum drying, it is necessary to make the degree of vacuum extremely high because of the heating system. For this reason, continuous operation is difficult, and batch operation is required, which requires time and labor and is not suitable for mass production of pregelatinized rice for brewing.

Further, the pregelatinized rice obtained by such a conventional method for producing pregelatinized rice has a dry odor and a yellowish color, and the crude fat contained in the pregelatinized rice contains , For example, when steamed for 30 minutes, 0.
At 05%, it was difficult to reduce it further.
At the same time, the degree of gelatinization in steamed rice was limited to about 80%, and it was difficult to expect further improvement.

[0006] Therefore, Japanese Patent Application No. 1-262172 filed by the same inventor discloses a technique of performing steaming rice treatment and drying treatment after heat treatment in a microwave oven. However, steamed rice with a lower water content than conventional steamed rice is obtained, and by drying this, pregelatinized rice better than before can be obtained. However, there was a long-awaited expectation for even better quality alpha-rice rice.

In order to solve the above problems, the object of the present invention is to reduce the amount of crude fat unsuitable for brewing in order to improve the above-mentioned problems, and at the same time, it has good solubility and is suitable for mass production by continuous operation. The purpose is to provide a method of producing rice.

[0008]

[Means for Solving the Problems] In order to achieve the above object, the present invention is to wash brewing white rice and soak it so as to maintain a constant water content to obtain immersed rice. While subjecting the immersed rice to high frequency treatment, It is a method for producing pregelatinized rice for brewing, which comprises producing pregelatinized rice by rapidly drying steamed rice cooked continuously with a large amount of low temperature dehumidified air to produce pregelatinized rice.

[0009]

[Advantage] By adopting the method for producing pregelatinized rice for brewing of the present invention, white rice for brewing is washed and soaked to maintain constant water content to make soaked rice, and the soaked rice is continuously steamed while being subjected to high frequency treatment. The steamed rice is rapidly dried with low temperature dehumidified air to produce pregelatinized rice, which has less coloring and less crude fat unsuitable for brewing, and has good solubility, which is suitable for mass production by continuous operation.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a schematic block diagram of an embodiment of an apparatus for producing pregelatinized rice for brewing according to the present invention, and FIG. 2 is a plan view of FIG. 1 and 2, an apparatus 1 for producing pregelatinized rice for brewing is an apparatus for producing pregelatinized rice from soaked rice, which is a soaked rice tank 3 for temporarily storing soaked rice, and the soaked rice tank 3 It is composed of a high-frequency irradiation device 9 for injecting the soaked rice from the soaked rice via a soaked rice transporting conveyor 5 and a hopper 7, a continuous steamer 11, a low temperature dehumidifying / drying device 13 and a takeout conveyor 15.

Immersed rice from the immersed rice tank 3 is introduced into the high-frequency irradiation device 9 through the immersed rice transport conveyor 5 and the hopper 7. The steeped rice is subjected to high-frequency heat treatment by the high frequency supplied through the high-frequency oscillator 17 and the waveguide 19 while passing through the high-frequency irradiation device 9, and the moisture is evaporated.

As a result, the moisture content of the steeped rice is reduced from that at the time of charging, and the reduced steeped rice is supplied to the continuous steamer 11 through the supply port 21, and the temperature of the continuous steamer 11 is 100 ° C. or more. Steamed rice having a low water content is transferred to the low-temperature dehumidifying and drying apparatus 13 by performing steamed rice treatment at the temperature.

The low-temperature dehumidifying / drying device 13 of the present invention comprises a net belt 25, a drive roller 27 for driving the net belt 25, a back roller 29, and a net drive device 35 including tension rollers 31 and 33, and a net belt. In the present embodiment, two crushing rods 39 provided above 25 and driven to rotate by the drive motor 37, a suction fan 41 provided in the intake chamber 51 on the inlet side, and two suction fans 51 behind the intake chamber 51. The dehumidifier 43 provided in the drying chambers 53, 53,
In this embodiment, which is composed of the heater 45 and the blower 47, it is composed of two dryers 49.

Steamed rice steamed by the continuous steamer 11 is
The suction fan 41 in the intake chamber 51 is continuously expanded from the hopper 23 onto the net-shaped belt 25 in the low temperature dehumidifying / drying device 13 with a uniform thickness. Rapidly cools and solidifies,
It is crushed into pieces by a crushing rod 39 which is rotationally driven by a drive motor 37.

The steamed rice which has been rapidly cooled and crushed is dried in a dryer 49.
The air dehumidified by the dehumidifier 43 of
For example, by using a large amount of low temperature dehumidified air that is heated to about 40 ° C. and blown into the drying chambers 53, 53 by the blower 47, low temperature dehumidification drying is performed without being solidified again, and the alpha is converted. The finished alpha-modified rice is
It shall be continuously carried out by the take-out conveyor 15.

As described above, the pregelatinized rice prepared by spraying a large amount of low-temperature dehumidified air on steamed rice cooked after high-frequency irradiation to dry it rapidly is dried in a shorter time than the conventional technique, and colored. It is a pregelatinized rice that has less fat, has no dry odor, and has less crude fat, making it ideal for brewing.

The present invention is not limited to the above embodiment, but can be carried out in other modes by making appropriate design changes, for example, a crushing rod 39, a suction fan. The quantity of 41 and the dryer 49 can be appropriately selected.

[0019]

As is apparent from the above description, the method for producing pregelatinized rice for brewing of the present invention is to wash the brewing white rice and soak it to maintain a certain water content to make it soaked rice. The steamed rice that has been continuously steamed while being subjected to high-frequency treatment is rapidly cooled and dried with a large amount of low-temperature dehumidified air to produce pregelatinized rice, which effectively solves the problems of the conventional technology, and Further, it has less coloring, reduces crude fat unsuitable for brewing, has good solubility, and is suitable for mass production by continuous operation.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of an apparatus for producing pregelatinized rice for brewing according to the present invention.

FIG. 2 is a plan view of FIG.

[Explanation of symbols]

 1 Alpha-fabricated rice production device for brewing 9 High-frequency irradiation device 11 Continuous steaming rice machine 13 Low-temperature dehumidifying and drying device 17 High-frequency oscillator 25 Net belt 39 Crushing rod 49 Dryer

Claims (1)

[Claims] 1. Washed white rice for brewing and soaking it to retain a certain amount of water to make it soaked rice, which is steamed continuously and pregelatinized while being subjected to high frequency treatment by a large amount of low temperature dehumidified air. A method for producing pregelatinized rice for brewing, which comprises rapidly drying and producing pregelatinized rice.