TW202031137A - Rice germ extraction method capable of obtaining a sieved germ product containing a higher proportion of germs - Google Patents

Abstract

This invention relates to a rice germ extraction method which is suitable for extracting germs from a plurality of brown rice, comprising the following steps: a rotation and collision step: placing the brown rice in a rotation and collision unit and making the rotation and collision unit rotate to drive the brown rice to roll and generate collision, so that the germs on the brown rice collide and fall off to obtain a collided product; a sieving step: sieving and classifying the collided products with a plurality of particle sizes and a plurality of weights by a mesh sieving unit and an air sieving unit, so as to obtain a sieved germ product with a particle size within a germ size range and a weight within a germ weight range, wherein the sieved germ product contains a higher proportion of germs.

Description

Rice germ extraction method

The invention relates to a grain processing method, in particular to a method for extracting rice germ from brown rice.

The rice after the rice husk is removed is called brown rice. The main components of brown rice include endosperm, germ attached to the endosperm, and a bran layer covering the endosperm and the germ. The main component of the endosperm is starch, and the bran layer and the germ are rich in multiple vitamins and dietary fiber, which are the main nutrients of the brown rice. Although brown rice has high nutritional value, because the bran layer is rich in fiber, the taste is not good after cooking. Therefore, the brown rice is processed through a rice mill to separate the bran layer and the germ from the endosperm, and then the endosperm is obtained by sieving, that is, the common white rice or polished rice on the market, and cooking The taste is good, but most of the nutrients in the rice are removed, and only starch and micronutrients are added after eating.

In order to prevent waste after the germ is removed, the remaining product after sieving, namely the germ, the bran layer, and the fragmented endosperm crushed by the rice mill, are used to use the particle size and The difference in weight is sieved again, and a sieve within the germ weight range and the germ size range is taken. The sieve contains a higher proportion of germs, which can be used as an additive for white rice cooking to increase the nutritional value of rice And retain the taste. However, because the remaining product contains a large amount of the bran layer and the fragmented endosperm, and has been milled to be quite finely crushed by the rice milling process, it is easy to be misjudged as germs and mixed into the components during the re-sifting process. The sieve material makes the germ content of the sieve material low.

The purpose of the present invention is to provide a rice germ extraction method that can overcome at least one of the disadvantages of the prior art.

Therefore, the rice germ extraction method of the present invention is suitable for extracting germs on most brown rice, and includes the following steps, a rotating collision step: putting the brown rice into a rotating slot of a rotating collision unit, and rotating the rotating collision unit Drive the brown rice to roll in the rotating trough to produce collisions, so that the germs on the brown rice collide and fall off, so as to obtain a collision product composed of the germs and germ-free brown rice; the sieving step: a mesh sieve The unit and a wind sieve unit screen and classify the collision products with multiple particle sizes and multiple weights, so as to obtain germ sieved products with a particle size within a germ size range and a weight within a germ weight range.

The effect of the present invention is that the germs on the brown rice are collided and shed off by the rotating collision step to obtain a collision product composed of the germ and germ-free brown rice. Among the collision products, due to the Most of the bran layer is still attached to the germ-free brown rice, and the germ-free brown rice is not broken into broken rice due to rolling, so the chance of being misjudged as the germ in the subsequent sieving step is reduced , And then can obtain the germ sieving product with a higher germ ratio.

Referring to Figures 1, 2, and 3, a first embodiment of the method for extracting rice germs of the present invention is suitable for extracting germs from most brown rice 9 (not shown), and includes the following steps:

Rotational collision step 11: Put the brown rice 9 in a rotating slot 21 of a rotating collision unit 2. The rotating collision unit 2 includes a rotating member 22 installed in the rotating slot 21, and a rotating member surrounding the rotating member 22 impact wall 23 radially outside. The rotating member 22 has a rotating disk 221 that generates rotation, and a plurality of ribs 222 protruding from one of the axial sides of the rotating disk 221 and arranged at intervals around the center of the rotating disk 221. By the centrifugal force generated by the rotation of the rotating member 22, the fins 222 guide the rotation displacement of the brown rice 9 and hit the collision wall 23. The germs on the brown rice 9 are collided and fallen off, so as to obtain a collision product 91 composed of the germs and germ-free brown rice (not shown in the figure) separated from the germs.

Screening step 12: screening and classifying the collision product 91 with multiple particle sizes and multiple weights by a mesh screen unit 3 and a wind screen unit 4, including the following sub-steps:

Screening step 121: Use the screen unit 3 to screen and classify the collision product 91 with multiple particle sizes. The screen unit 3 has several screens 31 arranged one above the other and the meshes gradually decrease from top to bottom. The collision product 91 undergoes layer-by-layer screening and classification of various particle sizes. In this embodiment, the mesh diameters of the screens 31 on the upper two layers are larger than the size range of the germ, so the first sieving product 92 obtained by sieving the screens 31 on the upper two layers Its main composition is the germ-free brown rice in the collision product 91, and the first sieved product 92 can be collected and then subjected to a general rice milling process to remove the bran layer outside the germ-free brown rice to obtain Common white rice; the mesh diameter of the bottom sieve 31 is smaller than the size range of the germ, so the sieve through the bottom sieve 31 is that the size is within a germ size range The germ mesh sieve product 93.

Air sieve step 13: The air sieve unit 4 is used to screen and classify the germ mesh product 93 by various weights. The air sieve unit 4 is a blower that provides appropriate wind power. The germ mesh product 93 will be blown by wind. Moving and spreading in front of the air sieve unit 4, the lighter the weight of the germ mesh product 93 is blown away, so that the substances of different weight ranges in the germ mesh product 93 are blown. The range of flying distance is different. Then, according to a distance range corresponding to a germ weight range, the substances within the distance range after the concentrated air sieve are selected to obtain a germ sieving product 94 with a high germ content. During implementation, the materials within the remaining distance range can be concentrated to obtain a second sieving product 95, which can be mixed into the feed of poultry or livestock for use.

It should be particularly noted that in other variations of the first embodiment, the order of the mesh screen step 121 and the air screen step 122 in the sieving step 12 can be reversed, so that the air screen unit 4 can The collision product 91 is screened and classified with different weights to obtain a germ air sieving product within the germ weight range (not shown). Then, the mesh sieve unit 3 is used to screen and classify the germ air sieve products with various particle sizes. In the end, the particle size is within the germ size range and the weight is within the germ weight range. The germ was screened product 94.

Moreover, the germ sieved product 94 can still be finely sieved by other mesh sieving units or other air sieving units to further narrow down the smaller germ weight range and smaller germ size range to obtain higher germ content The product.

In addition, it should be supplemented that the rotation collision step 11 is not limited to using the rotation collision unit 2 to generate centrifugal force on the brown rice 9 to cause the brown rice 9 to collide with the collision wall 23. In this embodiment, In other variants, the brown rice 9 can also be repeatedly stirred by rotating to make the brown rice 9 collide with each other, so as to achieve the effect of dropping the germ from the brown rice 9.

The number of the screens 31 used in step 121 of the mesh screen is not limited to three. In other variations of this embodiment, more screens 31 can be used for more fine sieving as required. Or only one sieve 31 with a variety of different mesh sizes can be used to classify the collision products 91 as particle size.

The wind screen unit 4 used in the wind screen step 122 is not limited to the use of positive pressure wind. In other variations of this embodiment, the wind screen unit 4 can also be arranged on the opposite side of this embodiment. , And using negative pressure to drive the lighter germ mesh sieve product 93 closer to the wind sieve device 4, the germ mesh sieve product 93 can also be classified by weight.

1 and 4, a second embodiment of the rice germ extraction method of the present invention is different from the first embodiment in that the rotation collision step 11 also uses a negative pressure suction unit 5 to generate the inside of the rotation groove 21 A negative pressure suction force, and by adjusting an appropriate magnitude of the negative pressure suction force, the product whose weight in the rotating tank 21 is less than or equal to the weight of the germ is sucked out of the rotating tank 21 and collected in a collection bag 6, and The collision product 91 is obtained, and then the collision product 91 is subjected to the subsequent sieving step 12. This process can reduce the weight of the substance in the collision product 91 that is heavier than the germ, thereby reducing the processing burden of the subsequent sieving step 12.

In summary, the effect of the method for extracting rice germ of the present invention is that the brown rice 9 obtains the collision product 91 through the rotating collision step 11, and the collision product 91 mainly contains all that is separated from the brown rice 9 due to the collision. The germ, and the germ-free brown rice. The germ and the germ-free brown rice have a large difference in particle size and weight, and are less likely to be misjudged in the subsequent screening process of the sieving step 12, and a higher proportion of the germ can be obtained.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

11: Rotation collision step 12: Screening step 121: Mesh Sieve Step 122: Wind Sieve Step 2: Rotating collision unit 21: Rotating slot 22: Rotating parts 221: Turntable 222: Rib 23: collision wall 3: Mesh screen unit 31: Screen 4: Wind screen unit 5: Negative pressure suction unit 6: Collection bag 9: Brown rice 91: collision product 92: The first screening product 93: Germ mesh sieve product 94: Germ sieved product 95: Second screening product

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a step flow chart of a first embodiment of the rice germ extraction method of the present invention; Figure 2 is a schematic flowchart of the first embodiment; Figure 3 is an incomplete cross-sectional view schematically illustrating the structure of a rotating collision unit; and Fig. 4 is a schematic flowchart of a second embodiment of the rice germ extraction method of the present invention.

11: Rotation collision step

12: Screening step

121: Mesh Sieve Step

122: Wind Sieve Step

Claims (8)

A method for extracting rice germs, which is suitable for extracting germs from most brown rice, including the following steps: Rotating collision step: putting the brown rice in a rotating slot of a rotating collision unit, rotating the rotating collision unit to drive the brown rice to roll in the rotating slot to produce collisions, so that the germs on the brown rice collide and fall off , To obtain a collision product consisting of the germ and germ-free brown rice; and Screening step: screening and classifying the collision products with multiple particle sizes and multiple weights by a mesh sieve unit and a wind sieve unit, so as to obtain a particle size within a germ size range and a weight within the germ weight The germs in the range are sieved. The method for extracting rice germs according to claim 1, wherein the sieving step includes a mesh sieve step: the collision product is screened and classified with multiple particle sizes by the mesh sieve unit to obtain the particle size The germ mesh sieve product within the germ size range, and an air sieve step: the germ mesh sieve product is screened and classified by various weights by the air sieve unit to obtain the germ sieve product. The method for extracting rice germ according to claim 1, wherein the sieving step includes an air sieve step: the air sieve unit is used to screen and classify the collision products by multiple weights, so as to obtain a weight of the germ The germ air sieve product within the weight range, and a mesh sieve step: the germ air sieve product is screened and classified with various particle sizes by the mesh sieve unit to obtain the germ sieve product. The method for extracting rice germs according to any one of claims 1 to 3, wherein, in the rotating collision step, a negative pressure suction unit is also used to generate a negative pressure suction force in the rotating tank, and the weight in the rotating tank The products below the germ weight are absorbed and collected to obtain the collision products. The method for extracting rice germs according to any one of claims 1 to 3, wherein the rotating collision step is driven by the centrifugal force generated by the rotation of a rotating member of the rotating collision unit located in the rotating groove The brown rice eccentrically strikes a collision wall that defines the rotating groove. The method for extracting rice germs according to claim 5, wherein the rotating collision step uses a turntable of the rotating member and a plurality of fins arranged around the center of the turntable to guide the brown rice to hit the collision wall . The method for extracting rice germs as described in claim 2, wherein the mesh sieve step is to carry out a variety of processes on the collision products through a plurality of sieve meshes arranged up and down in the sieve unit and gradually decreasing meshes from top to bottom. The particle size is screened and classified layer by layer to obtain the germ mesh product. The method for extracting rice germs as described in claim 3, wherein the mesh sieving step is to screen the germs by means of a plurality of sieves arranged up and down in the sieve unit with meshes gradually decreasing from top to bottom. Perform layer-by-layer screening and classification of various particle sizes to obtain the germ sieved product.

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