JP6948669B2 - Rice gel manufacturing method and rice flour bread using it - Google Patents

Description

The present invention relates to a gel-like food material made from rice.

The gelled food material has high moisturizing properties and is difficult to separate from water, so that the food lasts longer.
Gels made from rice are also sticky and have the property of being resistant to aging, so they can be used as additives in various foods.
When this gelled rice is used for bread, the swelling can be maintained, bread that lasts for a long time can be obtained, and gluten-free rice flour bread can also be made.
Moreover, when it is added to noodles and used, a chewy texture can be obtained.
In this specification, a gelled product made from rice is referred to as rice gel.

Patent Document 1 discloses a method for producing a rice gel.
However, the rice gel disclosed in the same publication must be high amylose rice having an amylose content of 25% or more.
In addition, since it is necessary to cook and gelatinize the rice and then mechanically stir it, the process is complicated and the storage stability of the cooked rice (rice) becomes a problem.

Japanese Patent No. 5840904

An object of the present invention is to provide a method for producing a rice gel, which can be obtained by a simple process and has excellent storage stability of the material before being made into a rice gel.
Another object of the present invention is to provide a method for producing gluten-free rice flour bread.

The method for producing a rice gel according to the present invention is characterized in that rice flour is heat-treated in a reducing atmosphere and then watered to form a gel.

Here, heating in a reducing atmosphere means making partially pregelatinized rice that has been partially pregelatinized while suppressing surface oxidation.
The pregelatinization rate may be adjusted according to the purpose and use of the rice gel.
For example, in the case of rice flour bread, the pregelatinization rate is preferably in the range of 10 to 40%.
As a method of heating in such a reducing atmosphere, for example, in the reducing atmosphere, a method of supplying superheated steam into the heater for the heat treatment can be mentioned as an example.

Superheated steam refers to active steam heated to a temperature exceeding 100 ° C., and is dry steam.
When rice flour or rice is heat-treated in such a state, partially pregelatinized dry rice flour or rice is obtained.

Rice flour that is heated in a reducing atmosphere becomes partially pregelatinized rice in a short time.
Further, the rice flour (powder) obtained by heating in a reducing atmosphere in the state of rice is a mixture of pregelatinized powder and non-pregelatinized powder because the surface side of the rice is partially pregelatinized.

As described above, since the rice flour partially pregelatinized in the reducing atmosphere is dried, it is excellent in storage stability unlike the conventional gelatinized material.
Further, the rice flour thus obtained becomes a sticky rice gel simply by adding water or warm water and mixing lightly.
This rice gel can be frozen and stored, and when it is used, it becomes a more sticky rice gel when it is thawed by warming it in a microwave oven or the like.
Although shearing may be performed as described in Patent Document 1, this shearing is not always necessary.
Moreover, it is not necessary to limit the rice to high amylose rice.

Next, when rice flour bread is produced using the rice flour (partially pregelatinized rice flour) thus obtained, a swelling and long-lasting bread can be obtained without using gluten.
Add lukewarm water to the rice flour produced by the above method and mix, and then add other flour, yeast, and seasonings such as sugar and salt to make bread dough.
At this stage, although it is a little pasty, it is fermented and baked in a commonly used bread machine or bakery to obtain plump rice flour bread.
Further, the superheated steam may be fermented for 20 to 30 minutes while supplying a small amount of superheated steam to the heater so that the inside of the vessel is in a reduced state.
Warm the ambient temperature of the heater to match the optimum temperature of yeast.
Next, the rice flour bread may be heated to 130 to 200 ° C. in a state of being sprayed with superheated steam and baked to obtain a fluffy rice flour bread having excellent maintainability.
Here, the expression of adding other flour is intended to mix commercially available flour such as rice flour and soybean in addition to the rice gel of the present invention.

According to the present invention, rice flour or rice is heat-treated in a heater in a reduced state by spraying superheated steam or the like, and then rice gel can be easily obtained.
Further, by using the rice flour or rice produced in this manner, a gluten-free rice flour bread can be made.

An example of the structure of the drum type continuous heat treatment apparatus is shown. An enlarged view of the vicinity of the rice flour input portion is shown. An enlarged view of the vicinity of the carry-out part is shown. (A) schematically shows a cross-sectional view of the device near the superheated steam input portion, and (b) shows an enlarged view of the vicinity where the inner cylinder portion is supported by a roller. The external view of the superheated steam spray pipe and the cover part is shown. A structural example of a superheated steam generator is shown.

An example of a rice flour or rice heating device used for the rice gel according to the present invention will be described with reference to the drawings.
FIG. 1 schematically shows the structure of the entire device, FIG. 2 shows a rice flour or rice input section, and FIG. 3 shows a unloading section.
FIG. 4A shows a cross-sectional view of the device near the loading portion of the inner cylinder drum, and FIG. 4B shows a cross-sectional view of the device near the roller support of the inner cylinder portion.

The drum-type continuous heat treatment device 10 has a tunnel-type outer chamber portion 11 having an inlet and an outlet, and an inner cylinder drum 12 composed of a rotating inner cylinder arranged along the tunnel.
The inner cylinder drum 12 is rotatably supported by rollers 12b and 12c as shown in FIG. 4, and is connected to a driving portion 13 such as a motor via a connecting portion 13a such as a coupling as shown in FIGS. 1 and 3. Are connected and rotation controlled.
One of the inner cylinder drums 12 is the loading section 14 and the other is the unloading section 15.
As long as the inner cylinder portion 12 is rotationally controlled, there is no limitation on the structure itself.
In addition, the inner cylinder drum has no holes in the outer peripheral wall to prevent rice flour from falling.

In this embodiment, as shown in the enlarged view in FIG. 3, in order to suppress an eccentric load from being applied to the inner cylinder drum 12, the drive motor shaft is coaxially connected to the inner cylinder drum 12, and the material to be processed is carried out. In order to secure 15, the flange 15a attached to the end of the cylindrical body of the inner cylinder drum 12 and the flange 15a fixed to the motor shaft were connected by a plurality of round bars 15b.
As a result, the partially pregelatinized rice flour falls from between the plurality of round bars 15b and can be received by the recovery hopper 18.
As shown in FIG. 4B, the presser roller 12e is attached downward by the spring 12f via the link 12d so that the radial displacement caused by the heating of the inner cylinder drum 12 can be easily absorbed. There is momentum.

Rice flour or the like is charged into the inner cylinder drum 12 from the charging portion 14, and the inner cylinder drum 12 moves toward the carrying portion 15 by the rotation of the inner cylinder drum 12.
It is preferable to incline a little so that the loading portion 14 of the inner cylinder drum 12 is slightly higher than the carrying out portion 15, and in this embodiment, the inner circumference of the inner cylinder drum 12 is easily controlled so that the transfer amount can be easily controlled. This is an example in which a spiral spiral screw 12a is attached along the surface.
It should be noted that FIGS. 2 and 3 show a state in which the outer peripheral wall of the inner cylinder drum is seen through.

There is no limitation on the method of charging the inner cylinder drum 12 into the charging unit 14.
In this embodiment, as shown in FIG. 2, a hopper 16 and a charging screw 16b are provided at the bottom thereof, and the charging screw 16b is rotationally driven by a motor 16a.

FIG. 6 shows a structural example of the superheated steam generator HE that supplies superheated steam to the superheated steam supply unit 20.
Applicants referred to the superheated steam generator as a hydroengine and used the abbreviation HE.
The HE is composed of a substantially L-shaped case body 51, and has a water storage portion 51b for storing water W on the lower side and a steam superheat space portion 51a erected above the water storage portion 51b.
A heater 52 is provided in the water storage section 51b, and an external cable and terminals 52a and 52b are connected to each other.
A superheater 53 is arranged in the steam superheat space 51a, and an external cable and terminals 53a and 53b are connected to each other.
Water is heated by the heater 52 of the water storage unit 51b, and steam is generated.
The generated steam is superheated by the superheater 53 in the superheated space 51a to superheated steam at 300 to 550 ° C.
The supply of water W to the superheated steam generator HE is connected to the water supply port 54 of the water storage unit 51b in a state of communicating with the water storage tank 30 provided outside by a pipe.
Therefore, when the water level of the water storage unit 51b drops, water is replenished only by the difference in water level from the water storage tank 30.
This water level can be confirmed by the water level meter 40.
Further, the water storage tank 30 is provided with an overflow portion 31 so that the water level becomes constant, and is connected to a water pipe or the like to adjust the valve.
The superheated steam generator according to the present invention is not limited to the L-shaped structure as long as it has a water storage section and a steam superheated space section provided above the water storage section.

As shown in FIG. 4A, the heater H is arranged inside the outer chamber portion 11 and above and below the outside of the inner cylinder drum 12.
The heating heater H has a plurality of rod-shaped sheathed heaters a built in the panel body, and is in a cantilever state in which the root side end portion is fixed to the side wall portion c of the outer chamber portion 11.
Terminals b ₁ and b ₂ are connected to an external cable and thermally expand when a current is applied, but since they are fixed in a cantilever state, they absorb thermal displacement.

Drum type continuous heat treatment apparatus 10 according to the present invention, the outer of the inner cylinder drum 12 a inside the outer chamber portion 11 as shown in FIG. 1, H ₁ a heater H of the structure described above and below in the divided into 10 sets of to H ₁₀ it has to the examples provided.
For example, the heaters (H ₁ , H ₂ ) are in zones 1, Z ₁ , (H ₃ , H ₄ ) are in zones 2, Z ₂ , and (H ₅ , H ₆ ) are in zones 3, Z ₃ , (H ₇ , 7,). By _{dividing the output of H 8} ) into zones 4, Z ₄ , and (H ₉ , H ₁₀ ) into zones 5 and Z ₅ , and controlling the output, the rice flour and the like are input from the input section 14 to the carry-out section 15. When heating from the outside of the inner cylinder drum 12, the temperature distribution inside the inner cylinder drum 12 can be controlled.
In this way, by controlling the temperature by dividing it into a plurality of zones, it is possible to control the conditions according to the rice flour and rice.

In order to reduce the inside of the inner cylinder drum 12 with superheated steam, the superheated steam supply unit 20 has a discharge port 51c of the superheated steam generator HE having the structure described above as shown in FIGS. 1 and 4. It is connected to the superheated steam spray pipe 21 of.
FIG. 5 shows an external view in which only the superheated steam supply unit 20 is taken out.
A plurality of spray holes 21a are formed in the superheated steam spray pipe 21 corresponding to each of the zones 1 to 5.
As a result, the inside of the inner cylinder drum 12 is reduced by superheated steam and comes into contact with the material to be treated, and the steam whose temperature has dropped is heated by the heater H in the inner cylinder drum 12 to, for example, 500 to 650 ° C. Because it is, it is reheated.
The present invention has made it possible to change the spray of this superheated steam by dividing it into zones.
As a method for this, the cover portion 22 was attached so as to form a predetermined insertion space portion 23 above the superheated steam spray pipe 21 as shown in the enlarged view in FIG. 4 (c).
The cover portion 22 was attached to the superheated steam spray pipe 21 by a support member 22a so as to have gap portions 23a at predetermined intervals.
As shown in FIG. 5, nozzle tubes 24a to 24c having different lengths are inserted into the insertion space portion 23, and in this embodiment, three nozzle tubes having different lengths (insertion depth lengths) are inserted. It is an example of placement, but there is no limit to the number.
The three nozzle pipes 24a to 24c are connected to the discharge ports 51c of the separate superheated steam generator HEs.
As a result, it is possible to provide a difference in the amount of superheated steam discharged to each zone.
The cover portion 22 has a chevron shape, and the powder soared by the air flow caused by the spray of superheated steam falls along the cover portion and returns to the lower side.

As a result, as shown in FIG. 1, _{heating can be controlled for each of zones Z 1 to} Z ₅ , and the discharge amount of superheated steam can also be controlled according to the position and state of passing through the inner cylinder drum 12 of the material to be treated.
The processing conditions for each zone are set on the operation panel 17.
Further, the discharge amount of superheated steam is mainly intended to bring the inside of the inner cylinder drum 12 into a reduced state, and although almost no exhaust gas is generated, exhaust cylinders 19a and 19b are provided.

Using this heat treatment device, rice flour made from white rice was continuously treated at a speed of passing from the charging section to the unloading section in about 1 minute.
When bread was made with commercially available rice flour using the partially pregelatinized rice flour thus obtained, a plump bread was obtained.

10 Drum type continuous heat treatment device 11 Outer chamber part 12 Inner cylinder drum 12a Spiral screw 13 Drive part 13a Connecting part 14 Input part 15 Conveying part 20 Superheated steam supply part 21 Overheated steam spray pipe 22 Cover part 24a Nozzle pipe 24b Nozzle pipe 24c Nozzle tube

Claims (1)

It has a tunnel-shaped outer chamber and an inner drum that is arranged inside and supported rotatably.
The inner cylinder drum is held at a position where the loading portion provided on one side is relatively higher than the carrying-out portion provided on the other side.
A heater is provided between the outer chamber portion and the inner cylinder drum.
In order to bring the inside of the inner cylinder drum into a reducing state, a superheated steam generator that sprays superheated steam into the inner cylinder drum is provided.
A method for producing a rice gel, which is produced by charging rice flour into the charging section of the inner cylinder drum and adding water to the partially pregelatinized rice flour carried out from the unloading section.

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