JP2005333955A - Method for producing rice flour for rice flour bread and apparatus for producing the rice flour - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing rice flour preferable for applying as a raw material for rice flour bread and as a food material applicable to a small production apparatus in accord with local characteristics, to provide an apparatus for producing the rice flour, and to provide a method for producing rice flour for rice flour bread, making soaking constant and the apparatus minimized, suppressing increase of rice temperature due to powdering heat in a milling step and capable of finishing the powdered flour to have a constant moisture, and to provide an apparatus for producing the rice flour. <P>SOLUTION: The method comprises continuously washing material rice with a rice washer 1, soaking the washed material rice in water with a continuous soaking conveyor 2, dripping water from the material rice, adjusting moisture of the material rice to about 28-34% with a tempering conveyor 3, finely milling the material rice with a vortex pulverizing mill 4, and drying the finely milled material rice with a flash dryer 5 to adjust moisture to be 12-14%. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rice flour production method suitable for use as a raw material for rice flour bread and a rice flour production apparatus thereof.

  In recent years, in order to promote villages throughout the region and improve the local food self-sufficiency rate, and to use and spread a wide variety of foods, as a food material that can replace flour, large-scale manufacturing such as flour milling Rice flour is attracting attention as a food material that requires small-scale production facilities that meet local characteristics, rather than food materials that require equipment.

  Recently, making bread using rice flour has become widespread nationwide, mainly among housewives. It is important that the rice flour suitable for use as a raw material for this rice flour bread undergoes a milling process that is not damaged by starch. In the milling process, it is necessary to soften the raw rice so as not to damage the starch. To soften the raw rice, it absorbs moisture and weakens the hardness of the raw rice. For this purpose, it is necessary to perform immersion for a certain period of time and moisture adjustment.

Conventionally, as a method for producing rice flour suitable for use as a raw material for rice flour bread, there is a method for machine milling after subjecting raw rice to macerate enzyme treatment. More specifically, this rice flour production method is intended to reduce the molecular weight of cell wall tissue components by causing macerating enzyme to act on raw rice such as brown rice, polished rice, and crushed rice, and in particular, the raw rice The rice flour obtained by airflow pulverization is obtained (Patent Document 1).
Japanese Patent Publication No. 7-100002 (Pages 1, 2)

  However, rice flour obtained by a currently practiced milling method is processed and used for dumplings, rice cakes, Japanese confectionery, etc., but the range of use of rice flour is still narrow. The reason for this is that, when compared to other cereals, the temperature when starch is gelatinized is high, the amount of water required at that time is large, and the water absorption of the rice flour itself is large, so stickiness and sagging are likely to occur. This is because the processability is inferior.

  In addition, the flour milling method that is currently generally performed is a batch type, and the raw rice is put into a dip tank, washed, dehydrated, and drained in a koji or container, so that the time elapsed from the beginning to the end of draining, There was a problem that moisture control could not be made uniform.

  Conventionally, there are roll mills, high-speed mills, drum mills, and vortex mills that are widely used as milling machines. Becomes a cylinder grinder. However, the pulverizer has a problem that the incidental equipment is large and cannot be made compact, and the cost of the equipment is high. In addition, the conventional equipment requires a sieving machine after pulverization, and when the raw material is supplied to the airflow drying tube after sieving, the temperature rises from the ambient temperature to the required drying temperature to obtain the amount of heat necessary for airflow drying. And had the problem that it was not suitable for energy saving.

  In addition, in the conventional rice flour production method described above, when the raw rice is treated with the enzyme, the washed raw rice is transferred to a dipping tank, and an aqueous solution with an appropriate enzyme concentration is added and dipped in the same amount as the rice weight. It is assumed that the enzyme treatment is performed at 20 to 40 ° C for 12 hours at 20 to 30 ° C, 8 hours at 30 to 35 ° C, and 5 hours at 35 to 40 ° C. Therefore, this conventional rice flour production method has a problem that it takes a long time for enzyme treatment of raw rice at any immersion water temperature.

  Therefore, the present invention has an object to solve the above-mentioned conventional problems, and a rice flour production method suitable for use as a raw material of rice flour bread as a food material that requires a small-scale production facility suitable for regional characteristics. And a rice flour production apparatus for the same, so that the immersion can be made constant and the apparatus can be miniaturized. Further, the rise in the product temperature due to the heat of grinding in the milling process can be suppressed, and the rice powder after grinding can be finished to a constant moisture. It is made for the purpose of providing the rice flour manufacturing method for rice flour bread, and the rice flour manufacturing apparatus.

  Therefore, the rice flour manufacturing method of the present invention continuously washes the raw rice with the rice washing machine 1, soaks the washed raw rice with the continuous dipping conveyor 2, drains the soaked raw rice, and then tempering the conveyor. 3 so that the moisture content of the raw rice is about 28-34%, and then the raw rice is finely pulverized by the vortex fine pulverizer 4, and the finely pulverized raw rice is dried by the airflow drying pipe 5. The moisture is adjusted to about 12 to 14%.

  In the rice flour production method of the present invention, when the raw rice is pulverized by the vortex pulverizer 4, the weight Wa of raw rice per minute supplied to the vortex pulverizer 4 and the vortex pulverizer inside The ratio Wb / Wa to the weight Wb of air per minute to pass through is adjusted to 0.05 to 0.1.

  Furthermore, in the rice flour manufacturing method of this invention, it is preferable that the washed rice is immersed in the continuous immersion conveyor 2 for 30 to 180 minutes.

  Moreover, the rice flour manufacturing apparatus of this invention is the rice washing machine 1 which wash | cleans raw rice continuously, the continuous immersion conveyor 2 which immerses the raw rice after washing | cleaning, and the tempering conveyor which adjusts the water | moisture content of the raw rice after immersion. 3, a vortex-type fine pulverizer 4 for finely pulverizing the raw material rice after moisture adjustment, and an airflow drying pipe 5 for drying the finely pulverized raw material rice.

  And it is preferable that the rice flour manufacturing apparatus of this invention shall connect the exhaust port of the said vortex-type fine crusher 4 to the airflow drying pipe | tube 5. FIG.

  Since the present invention is configured as described above, it is intended to make immersion constant and reduce the size of the apparatus, further suppress an increase in the product temperature due to the heat of grinding in the grinding process, and make the rice powder after grinding a constant moisture. The rice flour manufacturing method for rice flour bread which can be finished, and the rice flour manufacturing apparatus can be provided.

  And this invention can provide the rice flour manufacturing method suitable for using for the raw material of rice flour bread, and its rice flour manufacturing apparatus as food material which is small-scale, and requires the manufacturing equipment suitable for local characteristics.

  Hereinafter, the best mode for carrying out the rice flour production method and the rice flour production apparatus of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the rice flour production apparatus of the present invention includes a rice washer 1 for continuously washing raw rice, and a continuous dipping conveyor 2 for dipping the raw rice after washing. And the tempering conveyor 3 which adjusts the water | moisture content of the raw material rice after the said immersion, and the eddy current type pulverizer 4 which finely pulverizes the raw material rice after moisture adjustment, and also the air flow drying pipe 5 which dries the raw material rice after pulverization It is supposed to be equipped with.

  The rice washing machine 1 is supplied with raw rice stored in a raw material tank 7 by a bucket elevator 6. In this rice washing machine 1, a stirring blade, a suction pump, and the like are provided in a rice washing tank 15, and a draining rotary rod 16 is provided in an inclined state above the rice washing tank 15. In the rice washing machine 1 thus configured, while the water supplied to the rice washing tank 15 is overflowed, the raw rice is introduced into the rice washing tank 15, and the raw rice is submerged in the rice washing tank 15 while being washed with a water stream. The submerged raw rice is supplied to the draining rotary rod 16 by a suction pump, and rinsed and drained to continuously discharge the raw rice.

  The continuous immersion conveyor 2 is provided with spiral screw blades 21 inside the U-shaped trough, and the rotation of the screw blades 21 moves the raw rice in water toward the discharge port. A hopper 22 and a pump 23 are installed below the discharge port, and the soaked raw rice is sent to the dehydrator 8 by pumping up.

  The tempering conveyor 3 is supplied with the raw rice after immersion sent from the continuous immersion conveyor 2 to the dehydrator 8. The tempering conveyor 3 is a belt conveyor of a type in which belts are stacked in three stages, upper, middle and lower. The upper stage uses a mesh belt 31, and a slippery resin is attached to the steel plate so that the mesh belt 31 travels on the table. In addition, the mesh belt 31 is lifted slightly upward from the inlet side to incline the mesh belt 31, and a drain (not shown) is provided below the inlet. The middle and lower tiers use ordinary conveyor belts 32 and are provided with overflow prevention guides on both sides of the belt to cope with changes in the layer thickness of the raw material rice being conveyed. In addition, each of the upper, middle, and lower stages is provided with a single electric motor and a speed change mechanism, and the moisture of the raw rice is adjusted by the belt speed. In the tempering conveyor 3 configured as described above, the raw rice from the dehydrator 8 is first charged into the upper mesh belt 31, and the water adhering to the surface of the raw rice is removed while the mesh belt 31 is being transported. Transfer to 32. At that time, the raw material rice is inverted and mixed, and the surface adhering water of the raw material rice is further removed while the conveyor belt 32 is transported, and is transferred to the lower conveyor belt 32. The raw rice is inverted and mixed again, and the surface adhering water of the raw rice is further removed while the conveyor belt 32 is conveyed. That is, while being conveyed by these belts, the speed of the belts at each stage is adjusted so that the raw rice has a uniform moisture content. In addition, by providing the continuous immersion conveyor 2 and the tempering conveyor 3, the immersion can be made constant and the apparatus can be downsized.

  The vortex pulverizer 4 is supplied with the raw rice after moisture adjustment from the tempering conveyor 3 by the supply feeder 9. Although not shown in the figure, the vortex fine pulverizer 4 is sucked into the pulverization chamber by sucking the raw rice from the air intake port and the supply port attached to the lower portion of the pulverization chamber by a fan attached to the upper portion of the pulverization chamber. A rotor and blades are rotating in the room, and a serrated liner is attached to the inner surface of the casing, and the raw rice is finely crushed while repeatedly crushing and rubbing between particles caused by collision with the liner and high speed rotation. The fan is sucked up to the fan at the top of the grinding chamber and discharged outside the machine. In the vortex-type fine pulverizer 4 thus configured, in order to suppress an increase in the product temperature due to the pulverization heat, the mixing ratio between the feed rice and the amount of air passing through the inside of the machine is determined, and the raw rice becomes alpha due to heat etc. Is not caused. That is, when finely pulverizing the raw rice with this vortex pulverizer, the weight Wa of raw rice per minute supplied to the vortex pulverizer and the weight of air per minute passing through the vortex fine pulverizer By adjusting the ratio of Wb and Wb / Wa to 0.05 to 0.1, an increase in the product temperature due to the heat of grinding is suppressed.

  The raw material rice after pulverization is supplied from the vortex pulverizer 4 to the airflow drying tube 5. When the raw rice containing moisture is put into the tube through which the hot air passes, the air drying tube 5 is evaporated while the raw rice moves on the hot air and moves through the tube. The pipe through which hot air passes is divided into two parts, one being connected to the hot air generator 10 and the other being connected to the outlet of the vortex pulverizer 4. The airflow drying pipe 5 thus configured is directly connected to the exhaust port of the vortex pulverizer 4 and uses the pulverization heat of the pulverization process, so that the hot air temperature of the hot air generator 10 can be kept low, The amount of heat required to dry rice can be reduced. And in this airflow drying pipe | tube 5, the water | moisture content of the dried said ground rice is adjusted to about 12 to 14%.

  Further, the crushed rice dried by the airflow drying pipe 5 is supplied from the cyclone 12 to the product tank 13 by the blower 11. In addition, 14 in a figure is a bag filter for cleaning the ventilation by the blower 11. FIG.

  Then, the rice flour manufacturing method of this invention using the said rice flour manufacturing apparatus is demonstrated in detail below.

  First, the raw rice is continuously washed with the rice washing machine 1 of the rice flour production apparatus, and the washed raw rice is immersed with the continuous dipping conveyor 2. And after draining this immersed raw material rice, it adjusts so that the water | moisture content of raw material rice may be about 28 to 34% with the tempering conveyor 3. FIG. In this case, the surface moisture and the internal moisture of the raw rice are almost the same. Next, the raw material rice is finely pulverized by the vortex fine pulverizer 4, and further, the finely pulverized raw material rice is dried by the airflow drying tube 5 to adjust the moisture to about 12 to 14%.

  In the rice flour production method of the present invention, when the raw rice is pulverized by the vortex pulverizer 4, the weight Wa of raw rice per minute supplied to the vortex pulverizer 4 and the inside of the vortex pulverizer are passed through. The ratio with the weight Wb of air per minute, Wb / Wa, is adjusted to 0.05 to 0.1. Furthermore, the airflow drying pipe 5 is directly connected to the exhaust port of the vortex fine pulverizer 4, and the pulverized raw rice is dried to adjust the water content to about 12 to 14%. The particle size distribution of the raw rice after pulverization using the vortex pulverizer 4 can be appropriately adjusted by the rotational speed of the vortex pulverizer 4 and the amount of air passing through the apparatus.

  Moreover, in the rice flour production method of the present invention, the raw rice can be brown rice, polished rice, crushed rice, etc., but polished rice with a yield of about 90% is suitable for producing high-quality bread dough. It will be.

  Furthermore, in the rice flour manufacturing method of the present invention, it is preferable to adjust the water content of the raw rice with the tempering conveyor 3 by immersing the washed raw rice with the continuous immersion conveyor 2 for 30 to 180 minutes. It becomes.

  And, using the rice flour obtained by the production method of the present invention, bread dough was made by a conventional method, molded, fermented and baked to make coppe bread, and tasted inferior to coppe bread made using flour. I was able to get it. Furthermore, although bread, rolls, etc. were made using the rice flour obtained by the manufacturing method of this invention, the taste which is not inferior to what used wheat flour was able to be obtained like a cupe bread. Although the rice flour obtained by the production method of the present invention is suitable for use as a raw material for rice flour bread, it is used as a raw material for other foods such as udon, ramen, pasta, spaghetti, cookies, okonomiyaki and takoyaki. You can also.

  In the rice flour production method of the present invention configured as described above, the moisture content of the raw rice can be made constant, the air and rice flour are heated by pulverization heat, and an excessive amount of heat is not applied, and the vortex flow By connecting the pulverizer 4 and the air-flow drying pipe 5, the amount of heat required for drying can be kept low, the alpha of the rice flour is kept low, and the water content becomes uniform without impairing the flavor of the rice flour. Adjusted as follows. In addition, it adjusted the water | moisture content of the manufactured rice flour to about 12 to 14% in consideration of quality maintenance.

BRIEF DESCRIPTION OF THE DRAWINGS It is whole explanatory drawing of the rice flour manufacturing apparatus for the rice flour bread | pan of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rice washer 2 Continuous dipping conveyor 3 Tempering conveyor 4 Eddy current type fine crusher 5 Airflow drying pipe

Claims (5)

  The rice is washed continuously with the rice washing machine (1), the washed rice is soaked with the continuous dipping conveyor (2), the soaked rice is drained, and then the tempering conveyor (3) with the rice. Next, the raw material rice is finely pulverized by a vortex pulverizer (4), and the finely pulverized raw rice is dried by an air flow drying tube (5). And the water | flour was adjusted to about 12-14%, The rice flour manufacturing method for rice flour bread | pan characterized by the above-mentioned.   In pulverizing the raw rice with the vortex pulverizer (4), the weight of the raw rice (Wa) per minute supplied to the vortex pulverizer (4) and the inside of the vortex pulverizer are passed for 1 minute. 2. The method for producing rice flour for rice flour bread according to claim 1, wherein the ratio (Wb / Wa) to the weight (Wb) of the hit air is adjusted to 0.05 to 0.1.   The method for producing rice flour for rice flour bread according to any one of claims 1 to 3, wherein the washed raw rice is dipped for 30 to 180 minutes on a continuous dipping conveyor (2).   A rice washing machine (1) for continuously washing raw rice, a continuous immersion conveyor (2) for immersing the raw rice after washing, a tempering conveyor (3) for adjusting the moisture of the raw rice after immersion, and moisture An apparatus for producing rice flour for rice flour bread, comprising: a vortex type fine pulverizer (4) for finely pulverizing the raw material rice after adjustment; and an airflow drying pipe (5) for drying the finely pulverized raw material rice .   6. An apparatus for producing rice flour for rice flour bread according to claim 5, wherein an exhaust port of the vortex pulverizer (4) is directly connected to an air flow drying pipe (5).

Images