CN100443183C - Processing method and equipment for washing-free rice - Google Patents

Abstract

The invention provides a processing method for non-washing rice, which does not need to be washed before cooking, and comprises the following steps: preparing polished rice, the polished rice is polished by built-in white rice polishing equipment, and Sieving and/or polishing rice from an external source by means of a built-in sifting device; preparing polished rice bran (roasted rice bran) as an abrasive; preparing a mixture consisting of polished rice and abrasive in which the rice is polished and The abrasive material adopts the required ratio; the mixture is stirred by rotating the stirring blade, so that the polished rice and the abrasive material rub against each other to remove the adhered rice bran including bran and impurities on the surface of the rice grain; sieve the stirred mixture, In order to separate the rice bran from the rice grains; separate the remaining adhered rice bran and impurities from the sieved rice grains to obtain finished non-washing rice; and recover the separated rice bran as recycled rice bran, and the recycled rice bran as abrasive.

Description

Processing method and equipment for washing-free rice

technical field

The invention relates to a processing method and device for washing-free rice. The washing-free rice does not need to be washed before cooking.

Background technique

Most methods of processing no-wash rice use a rinsing (using water) step (ie, wet processing). However, some use dry processing methods. Published Japanese Patent Application No. 2001-286773 (herein incorporated as reference 1) discloses one of such dry processing methods, which provides a simple and compact waterless rice rinsing device, the procurement cost Low, can be used in units such as small food processing enterprises, restaurants, hotels and hospitals. The disclosed waterless rice rinsing device includes: a feeding device for supplying polished rice and abrasive mixed with white rice, a rice rinsing chamber for accommodating the mixture of polished rice and abrasive, a separation device for separating pure polished rice, Abrasives and rice bran from the washing mixture, wherein: the feeding device is arranged above the rice washing chamber, the separating device is arranged below the rice washing chamber, and a plurality of baffles are arranged in the rice washing chamber.

Published Patent Application No. 2001-96177 (herein as reference 2) discloses a polished rice washing device that can remove the oxide layer, rice bran layer and polished rice surface without damaging the polished rice surface scratches in the rice bran. The disclosed polished rice rinsing device includes: a rice feeding port, a rice polishing chamber, a pair of rice polishing discs embedded with brushes, an end cover to prevent the rice from overflowing from the rice polishing disc, a driving device for driving the polishing disc, Another end cover for preventing the rice bran from overflowing from the polished rice polishing chamber is a polished rice discharge port, wherein: the polished rice feeding port and the polished rice discharge port communicate with each other through the polished rice polishing chamber, the polished rice polishing disc is arranged inside the polished rice polishing chamber, and The tips of the brushes are respectively arranged on the rice polishing disc in directions opposite to each other, and a through hole is arranged on the end cover of the rice polishing disc. According to the device obtained by the disclosed invention, the oxide layer on the surface of polished rice, the layer of rice bran and the rice bran in the scratches of polished rice can be removed without damaging the surface of polished rice through the brushes arranged at the upper and lower parts of the device .

In the invention disclosed in Reference Document 1, although rolled natural grains or extruded fine grains are used as abrasives, the quality of non-washing rice obtained by this device cannot be perfectly guaranteed.

In the invention disclosed in Reference Document 2, a brush is used as means for removing rice bran from the surface of rice grains. Since the rice bran remaining on the surface contains 20% oil, using a brush is a problematic approach from the viewpoint of actual production such as the efficiency of removing the rice bran, the operability of the device, and the contamination of the brush. Cooked rice still endures the smell of rice bran. The removed bran will re-adhere to the surface of the rice grains in some parts of the unit, so one or two rinses are necessary to avoid sustaining the bran smell in the cooked rice.

The so-called non-washing dry rice processing method refers to a processing method in which the polished rice is rinsed with water and then dried. Even in this processing method, mold and microorganisms are easy to grow due to the moisture remaining in the rice grains. on polished rice. In addition, even if the polished rice is coated with a layer of starch slurry to protect the surface of the rice grains, the starch slurry layer will gradually deteriorate, which means that the quality of the polished rice has deteriorated, so that the polished rice cannot be stored for a long time.

Contents of the invention

The present invention focuses on the above-mentioned problems, and aims to provide a processing method for washing-free rice and a device for applying the method. The non-washing rice processing method of the present invention does not need to use water, and only uses the polished rice bran (roasted rice bran) patented by the applicant as an abrasive to remove adhered rice bran and impurities on the surface of rice grains. Because the roasted rice bran is hard and dry, and does not contain any oil, even if it is dry sand-polished white rice, the rice bran adhering to the surface of the rice grain can be effectively removed by stirring the roasted rice bran and the rice grain. In addition, the toasted rice bran can be easily separated from the polished rice, and there is no need to endure the taste of coarse bran. The processing method and device for producing non-washing rice of the present invention utilize the above-mentioned characteristics of the toasted rice bran. The processing method for producing non-washing rice of the present invention comprises: a stirring step, a screening step and a separation step, and a recovery and recycling step of using the collected and recycled rice bran as an abrasive. The processing device includes not only a device for performing the above steps, but also an electrostatic precipitator that can prevent rice bran and impurities from adhering to the polished rice in a step subsequent to the sieving step.

Using the method and apparatus described hereinafter, the above-mentioned problems can be solved.

(1) A processing method for non-washing rice, which does not need to be washed before cooking, comprising the following steps: preparing polished rice, the polished rice is made by polishing brown rice with a built-in white rice polishing equipment, and Sieving and/or polishing rice from an external source by means of a built-in sifting device; preparing polished rice bran (roasted rice bran) as an abrasive; preparing a mixture consisting of polished rice and abrasive in which the rice is polished and The abrasive material adopts the required ratio; the mixture is stirred by rotating the stirring blade, so that the polished rice and the abrasive material rub against each other to remove the rice bran and impurities including the chaff on the surface of the rice grain; sieve the stirred mixture, In order to separate the rice bran from the rice grains; separate the remaining adhered rice bran and impurities from the sieved rice grains to obtain finished non-washing rice; and recover the separated rice bran as recycled rice bran, and the recycled rice bran as abrasive. Among them: in the stirring step, if the level of the mixture in the stirring box is lower than the predetermined level, 1) whether it is at the end of the non-washing rice processing operation, 2) or the mixture is not enough to fill the capacity of the stirring box, it is necessary to increase the stirring at this time The speed of the blades.

(2) The method as described in (1), wherein: the sieving step is carried out in a cylindrical sieving device installed at an inclination, the outer profile of the cylindrical sieving device is made of a screen, and when the mixture flows downward, The rice bran is separated from the rice grains by the rotation of the inclined cylindrical sieving equipment.

(3) The method as described in (1), wherein: the separation step is a step of separating impurities such as fine powder adhering to the surface of the rice grain, and the separation step is carried out in one or more finished components , each finished product assembly includes: a feeding guide device for feeding rice grains evenly; a cylindrical rotating brush device for brushing the surface of rice grains; an adjustment for smoothing the fed rice grain layer and adjusting the stock of fed rice grains device; and a comb-shaped wedge for cleaning the brush of the cylindrical rotating brush device; wherein: while adjusting the stock and residence time of the rice grains, the rice grains are evenly fed in the opposite direction to the rotating direction of the cylindrical rotating brush device, so that The rice grains are rubbed by the cylindrical rotating brush device to remove impurities such as fine powder adhering to the surface of the rice grains; the finished rice is discharged as non-washed rice; and the separated impurities such as fine powder are drawn out and passed through The solid-gas separation device is discharged.

(4) The method as described in any one of (1)-(3), wherein: the ionized air from the ion generating device is sent to the screening step and the separation step to eliminate static electricity to avoid The impurities in the rice stick to the finished rice again.

(5) A processing device for non-washing rice, which does not need to be washed before cooking, including: a polished rice warehouse for accommodating polished brown rice, and the brown rice passes through the built-in brown rice polishing equipment Polishing and sifting through built-in sifting equipment or using polished rice from an external source; stirring device for mixing the mixture, which consists of polished rice and abrasives, by rotating stirring paddles , in the mixture, the polished rice and abrasives adopt the required ratio; a conveying device for conveying the stirred mixture including polished rice and rice bran; a screening device for sieving the rice bran from the polished rice; A separation device comprising a cylindrical rotating brush device for removing residual impurities such as fine powder from the surface of rice grains in order to obtain finished non-washed rice; and a separation device for using recycled rice bran as an abrasive out of the rice bran recovery device. Wherein: the stirring device includes: a vertical rotating shaft installed in the vertical rotating chamber; a plurality of rotating blades arranged in multiple layers rotates radially around the vertical shaft; the shut-off valve is arranged at the bottom of the vertical rotating chamber; and a control device , used to control the rotation speed of the rotating paddle according to the level of the mixture in the vertical rotating chamber, and to control the delivery amount of the stirred mixture to the next step.

(6) The device as described in (5), wherein: the screening device is a cylindrical screening device arranged obliquely, and the outer profile of the cylindrical screening device is formed by a screen; The guide part is arranged obliquely inside the cylindrical sieving device arranged obliquely, so that the mixture is sieved while the mixture rotates and moves downwards, and the rice bran is separated from the rice grains.

(7) The device as described in (5), wherein: the separation device is a device for separating impurities such as fine powder adhering to the surface of the sieved rice grains, and the separation device is composed of one or more Composition of separation components, each separation component includes: feeding guide device for balanced feeding of rice grains; cylindrical rotating brush device for brushing the surface of rice grains; used for smoothing the fed rice grain layer and adjusting the stock of fed rice grains and a comb-shaped wedge for cleaning the brush of the cylindrical rotary brush device; wherein: impurities such as fine powder are separated from rice grains; and impurities such as fine powder are extracted and passed through solid The gas separation device is discharged.

(8) The device as described in (7), wherein: the separation assembly also includes: the feeding guide device inclined downward is composed of a bottom plate and a partition, and the partition is arranged on the bottom plate along the width towards the end; The device is arranged below the end of the feeding guide device, and a brush is set on the barrel of the cylindrical rotating brush device; wherein: the brush rotates to lift the falling rice grains; While forming the gap between the rotating brush devices, adjust the inclination angle of the adjusting device to make the fed rice grain layer smooth and adjust the stock of fed rice grains; and the comb wedge for cleaning the brush of the cylindrical rotating brush device piece.

(9) The device as described in (7), wherein: the separation assembly includes: feeding guide device; feeding guide auxiliary device; cylindrical rotating brush device; and comb-shaped wedge; wherein: feeding guide device and feeding material The guide auxiliary devices are all set at a predetermined inclination angle, and are composed of a permeable screen with a screening structure; keep the gap formed between the end of the feeding guide device and the end of the cylindrical rotating brush device, so that the falling The rice grains are lifted by the rotating brushes on the drum rotating brush unit; the comb wedges used to clean the brushes of the said drum rotating brush unit; all parts are pre-designed to install each part conveniently position.

(10) The device as described in any one of (5)-(7), wherein: the static elimination device is connected with the screening device and the separation device; and the static elimination device includes an ionized air generator and an ionized air delivery device.

The invention provides a processing method and device for washing-free rice. The non-washing rice processing method of the present invention uses the polished rice bran (roasted rice bran) that the applicant enjoys as an abrasive to remove the rice bran and impurities adhering to the surface of the rice grains. The non-washing rice processing method of the present invention comprises a stirring step, a sieving step, a separation step and a recovery and recycling step of using the collected and recycled rice bran as an abrasive. The processing device for non-washing rice includes not only the operating components to carry out the above-mentioned steps, but also an electrostatic precipitator that supplies ionized air to the separated rice bran and impurities to prevent them from being Adheres to polished rice during each step of the process.

Treating no-wash rice with water or coating with starch can produce mold or breed microorganisms on the surface of the treated rice grains. Most of the dry-processed non-washing rice on the market still contains 20% oil because the rice bran adheres to the surface of the rice grain, so the cooked rice has an unpleasant smell produced by coarse rice bran.

Since the non-washing rice processing device of the present invention does not need to use water at all, and only uses roasted rice bran obtained from defatted rice bran, and does not introduce impurities into polished rice, it is possible to obtain safe and unnecessarily endure the unpleasant smell from coarse rice bran. The smelly rice contains only a very small amount of oil on the surface of the rice grains. Thus, the present invention can provide high quality polished rice with a longer shelf life than non-washed rice treated with water, and can provide no-washed rice that does not require rinsing before cooking.

Description of drawings

Fig. 1 shows a flow chart of each step of rice-free processing in one embodiment.

Fig. 2 is a schematic diagram of a whole set of processing equipment for non-washing rice in one embodiment.

Figure 3 shows a schematic side view of the stirring device: (a) the stirring paddles arranged obliquely in the vertical cylinder; (b) the comb-shaped paddles formed by rods in the vertical cylinder; (c) the inverted Comb-shaped paddles formed by rods in a tapered barrel.

Fig. 4(a) shows a partially cutaway side view of the structure of the screening device, and Fig. 4(b) is a sectional view along line A-A in Fig. 4(a).

Figure 5 shows a schematic side view of the combined separation device.

Figure 6 shows a perspective view of the feed guide and the cylindrical rotating brush arrangement.

Fig. 7 shows a schematic side view of the combined separation assembly in another embodiment.

Explanation of reference signs

1 Abrasive feeding bin

2 polished rice feeding silo

3 mixing box

3a Stirring paddle

3b Axis of rotation

3c Rotary drive assembly

4 shut-off valve

5 conveying device

6 Screening equipment (rotary drum screening equipment with inclined setting)

6a Cylinder (composed of screen mesh)

6b Box-shaped shell

6c drive unit

6d bezel

9 Recovery and recycling device for separated rice bran

10 level sensor

11 Separation device

9a Feeding guide device

9b Cylindrical rotating brush device

9c Feeding smoothness and adjustment device

9d, 9d, comb wedge

9B Bottom plate

9S Partition

12 air inlet

Br hair brush

11a Continuous shut-off valve

13 Solid-gas separation device

13a exhaust pipe

13b exhaust fan

14a Ion generating device

14b Ionized air supply device

14c ionized air intake

15 blower

15a ionized air mixer

20 rice polishing device

20a Rice Polishing Equipment

20b Screening equipment

20c Ash Collector

20d exhaust fan (suction fan)

20e Conveying device

ai ionized air

Ri rice grains

U1 to U5 finished components

pa fine powder

70 Feeding guide device

71 Feeding guide auxiliary device

72 Cylindrical rotating brush device

73 Comb Wedge

Detailed ways

In the case of referring to the accompanying drawings, the embodiment of the non-washing rice processing method and equipment thereof of the present invention will be described in detail.

Example

Referring to Fig. 1, one embodiment of the rice processing method without washing will be described.

Prepare polished rice (step S1). The polished rice can be provided by the common rice polishing equipment of the present invention, or by other polishing equipment. Polished rice bran (roasted rice bran; described in Japanese Patent No. 3453127 of the present inventor) is prepared as an abrasive (step S2). The polished rice and the abrasive are mixed in a desired ratio, for example, 1:1 volume ratio, by stirring the paddle 3a (see FIG. 2 ) (step S3). In this step, the polished rice and the abrasive are rubbed against each other to remove the rice bran, which includes rice bran from the surface of the rice grain and impurities adhering to the surface of the rice grain. While stirring the mixture of polished rice and ground material, the level of the mixture is measured by the level sensor 8 (see FIG. 2 ) for determining whether a predetermined level (or depth) is exceeded (step S4). If the mixture exceeds the predetermined level, the mixture will be conveyed to the rotary drum screening equipment 6 arranged at an inclination through the conveying device 5 for screening (step S5). The conveying device 5 can be such as a hopper conveyor, a screw conveyor, a pneumatic Conveying devices such as conveyors. The cylinder 6a is made of a screen (see FIG. 4(a)), the screen surrounds the outer surface of the rotary drum sieving device 6, and the conveyed mixture is carried out inside the rotary drum sieving device 6. sieve. The sieved rice is discharged from the rotary drum sieving plant (step S6) and sent to a separation device consisting of several modules (U1, U2....Un), each of which includes a feeding guide 9a, a cylindrical rotating brush device 9b, an adjustment device 9c for smoothing the rice grain layer and regulating the retained amount of rice grains, and comb-shaped wedges 9d, 9d. The remaining rice bran and impurities are separated from the sieved rice in the separation device (step S7). The rice is discharged as a finished product after the separation operation (step S11). Impurities such as fine powder are discharged through a draft exhaust device, which has a gas-solid separation device 13 (see Figure 2) such as a cyclone separator, a bag filter (step S12), and at the same time, the Machine 13b draws air out.

All the rice bran obtained in the sieving step (step S5 ) and the rice grain separation step is collected by the separated rice bran recovery and circulation device. The rice bran is then returned to the abrasive feed bin (see Figure 2), where it is used as abrasive (step S9). When the recycled rice bran is damaged, it is replaced with a new abrasive (roasted rice bran for white rice polishing). The damaged rice bran is discarded after being discharged (step S10). A portion of the damaged rice bran can be recycled to be used with newly added fresh rice bran.

When the measured mixture level in step S4 is lower than the predetermined level, the rotation speed of the stirring blades may be increased so that the pressure of the mixture rises to the pressure of the predetermined level within the normal rotation speed. When increasing the rotational speed of the rotating paddle, a sufficient frictional force can be obtained between the rice grains and the abrasive even when the continuous non-washing rice processing process is terminated or when the amount of the mixture is lower than the predetermined level, almost consistent processing.

The polished rice bran is roasted at high temperature (120° C. in this embodiment), so the roasted rice bran does not contain moisture substantially, and forms dry and hard granules without the smell of rough rice bran. Therefore, the roasted rice bran showed excellent grinding effect, which is an ideal abrasive for rice grain polishing. Based on the characteristics mentioned above, the toasted rice bran can pass through the sieve holes smoothly without clogging the sieve holes.

As shown in FIG. 2, ionized air from the ion generating device is supplied to the sieving and separating step for eliminating static electricity of the rice grains Ri, thereby preventing impurities such as fine powder from adhering to the rice grains Ri again.

The bran in the present invention includes all the rice bran adhered to the surface of rice grains, pits and scratches.

The configuration and functions of the equipment for processing non-washing rice will be described below with reference to the accompanying drawings.

In Fig. 2, the figure mark "1" refers to the abrasive material feed bin, and the reference numeral "2" refers to the polished rice feed bin for accommodating the polished rice, which comes from the non-washing rice processing device combined The rice polishing device 20 or the polished rice from the outside. The above-mentioned two feeding bins are connected with the stirring box 3, and rice bran and polished rice are mixed at a volume ratio of 1:1. In the stirring tank 3, a stirring paddle 3a is installed on a rotating shaft 3b driven by a driving assembly 3c to rotate at a predetermined speed. The thoroughly mixed mixture including rice bran and polished rice is conveyed to a screening device 6 through a shut-off valve 4 such as a rotary valve and a conveying device 5 such as a barrel conveyor, screw conveyor or pneumatic conveyor. The shut-off valve 4 has a plurality of rotating blades, and the feeding amount can be changed by changing the rotation speed of the blades. Reference numeral "20a" refers to rice polishing equipment, reference numeral "20b" refers to screening equipment, reference numeral "20c" refers to ash collector, and reference numeral "20d" refers to waste gas fan (extractor Air machine), reference numeral "20e" refers to conveying devices such as barrel conveyors, pneumatic conveyors, eccentric motors, electromagnetic drive conveyors and the like.

The level sensor 8 is arranged at a position of 1/3 height from the bottom of the mixing box 3 . The level sensor is connected to a control device 8a such as a control module, which controls the rotation speed of the stirring blade 3a and the feed rate of the mixture to the next step according to the measured level.

The quantity of the level sensor 8 is not limited to only one, but two or more sensors can be used to realize precise control.

In order to determine the stirring speed and the rotation (feeding) speed of the shut-off valve 4 through the detection data of the sample and environmental conditions such as temperature and humidity, a sampling valve for sampling can be provided at the bottom of the stirring tank 3 . The rotational (feeding) speed of the shutoff valve 4 is changed according to the rotational speed of the rotational drive assembly 3c. For example, when the rotational speed of the rotary drive assembly 3c is at a low speed, the rotational speed of the shutoff valve 4 increases. In other words, when the mixture in the stirring tank has a large holding amount, the rotation speed of the shutoff valve 4 is increased to increase the discharge speed (feed speed to the next step).

Contrary to this, when the rotational speed of the rotary drive assembly 3c is at a high speed, the rotational speed of the shutoff valve 4 decreases. In other words, when the hold amount of the mixture in the stirring tank is small, the rotation speed of the shutoff valve 4 is reduced to reduce the discharge speed (feed speed to the next step).

The speed change control mentioned above is usually operated at the end of the continuous processing process or when the feed amount of the mixture is changed for some reason. However, it is preferred to keep these speeds constant during continuous processing. Control components can be switched from automatic to manual control and vice versa.

The agitating blade 3a shown in Figure 2 has a similar herringbone structure, but as shown in Figure 3 (a), the agitating blade 31a can be twisted in the horizontal direction around the axis of rotation arranged in the upright cylinder 31. A plurality of long plates constitute, or as shown in Figure 3 (b), the comb-shaped stirring paddle 32a can be formed by a plurality of rods around the axis of rotation arranged in the upright cylinder 32, or as shown in Figure 3 (c) As shown, the comb-shaped stirring blade 33a may be composed of a plurality of rods (similar to FIG. 3( b )) arranged in the inverted cone-shaped cylinder 33 around the rotation axis.

In FIG. 3 , reference numerals 31c, 32c and 33c are rotating drive assemblies, 31b, 32b and 33b are rotating shafts for installing stirring blades, and 31d and 33d are rotating blades for conveying the mixture. 31e, 32e and 33e are frames for securing the rotary drive assembly to the mixing tank. The reference numeral "8" is a level sensor, such as a capacitive level indicator, as shown in h1, h2 and h3 in Fig. 3, the level sensor is installed in the stirring tank at a height of 1/3 from the bottom. But it is not limited to the height of 1/3 from the bottom.

Usually the conveying device 5 can adopt a conveying device such as a hopper conveyor, a screw conveyor, and the like, and is connected with the next step, that is, connected with the screening equipment 6, but a pneumatic conveyor can also be used.

If the non-washing rice processing system has sufficient height for installing the mixing box 3 at the highest point in the system, gravity conveying components can be used in the whole system.

Figure 4(a) shows a schematic side view, partially cut away, of the structure of the screening device.

The screening device 6 is a rotary drum screening equipment, which is installed inclined downwards. The cylinder 6a, which is the rotating part, consists of a screen, which is also composed of most of the parts of the screening device. As shown in FIG. 4(a), a plurality of baffles 6d are obliquely installed inside the cylindrical body 6a one by one. Since the outer peripheral surface of the cylinder is composed of a screen with a certain size of mesh, the rice grains move forward sequentially through the rotation of the cylinder, and at the same time, the rice bran, which is smaller than the rice grain, is discharged through the mesh on the outside of the cylinder. . The rice grains inside the barrel are discharged to the next step through the discharge ports 6i and 6f.

Ionized air from the ion generating assembly is delivered to the box-shaped housing of the screening device 6 through the ionized air inlet at least while the cylinder 6a is rotating. Therefore, ionized air is filled inside the box-shaped case, and static electricity on rice grains and rice bran can be eliminated by the antistatic effect of the ionized air.

The cylindrical body 6a is constituted by a mesh, and its rotating shaft 6h is fixed and supported by the box-shaped casing 6b. The drive transmission assembly 6e is provided at the end of the rotating shaft 6h extending to the outside of the box-shaped case 6b, and is connected to a driving device 6c such as a motor.

The discharge port 6k connected with the separated rice bran recovery and circulation device box 7 is arranged at the bottom of the box-shaped housing, so the discharge port 6k can easily recycle the rice bran screened outside the cylinder (see Figure 4 (a) ). The separated rice bran recovery and circulation device box 7 is provided with a control unit 7a for controlling the delivery amount of the separated rice bran, a regulating valve 7b for adjusting the delivery amount, and a storage box 7c for containing the discharged rice bran.

Reference numeral "6g" in FIG. 4(a) is a strut for reinforcing and supporting the supporting member 6m supported on the sliding surface abutting against the lower end of the cylindrical body 6a.

The screening device 6 is not limited to the above-described embodiments, but may adopt driving methods such as eccentric motor driving and electromagnetic driving. Other driving methods such as reciprocating chassis and rotary can be used. It also goes without saying that ionized air for static elimination is necessary in any type of screening installation.

Reference numeral 5 a is the outlet of the conveying device 5 and leads to the screening device 6 .

Fig. 4(b) is a sectional view of the cylinder body 6a along line A-A in Fig. 4(a). As shown in FIG. 4( b ), a baffle is provided inside the cylinder 6 a, and the provided baffle divides the inner surface of the cylinder 6 a into three regions. Figure 4(b) shows an example of the clockwise direction as described by the direction of the arrow. The height of the baffle is 1/4 of the diameter of the cylinder 6a, but its height is not limited to this height.

FIG. 5 shows a schematic side view of the separating device 9 composed of finished components U1 to U5 .

As shown in Figure 6, the finished device U1 comprises a downwardly inclined feeding guide 9a made of a bottom plate 9B and a partition 9S, and the partition 9S is arranged on the width direction of the end of the bottom plate 9B; the cylindrical rotating brush device 9b consists of Composed of a plurality of brushes Br and a rotating shaft 9j, the brushes Br are implanted on the cylinder below the end of the downwardly inclined feeding guide 9a, and the rotating shaft 9j rotates the brushes Br in the direction C to lift the falling rice grains Ri; a comb wedge for cleaning the brush Br of the cylindrical rotating brush unit 9b; and a feed smoothing and adjusting device 9c, which can adjust the gap between itself and the brush Br by changing its inclination.

As shown in FIG. 5, by moving the common connecting arm 9e back and forth in the direction A, the feeding smoothing and adjusting device 9c can be swung around the support shaft 9f, so that the feeding smoothing and adjusting device 9c can be swung in the direction B to Change its angle of inclination, just can adjust feeding smoothness and the gap between regulating device 9c and the brush Br, thereby when obtaining smooth feeding rice grain layer, just adjusted the stock of rice. The individual feed smoothing and regulating devices 9c of the individual finished units U1 to U5 are linked together by a common connecting arm 9e and can therefore be swiveled together.

As shown in Fig. 5, in the finished components U1 to U3 constituting the separation device 9, the smoothness and smoothness of the brushes and the feed material can be adjusted by changing the inclination angle of the feed smoothness and adjustment device 9c for adjusting the retention volume and residence time of rice. The gap between the adjustment devices 9c, therefore, while the rice grains are bouncing on the brush, friction is obtained in the rotation of the brush in the opposite direction (direction C as shown in Figure 6), and then the rice grains Ri rotate along the direction E of brushes fall to the next finished component. At the same time, impurities such as fine powder remaining in the rice grains are sucked and discharged by the exhaust fan 13b.

In the finished units U4 and U5, the rice grains Ri are fed in the same direction (G direction) as the rotation direction (C direction), and therefore, the friction between the rice grains is softer than that in U1 to U3. In the finished assemblies U4 to U5, reference numeral 9d is a comb wedge.

The preferred characteristics of the brushes of the cylindrical rotating brush device 9b, such as thickness, hardness, length and implantation density, can be determined by the bouncing friction of rice grains Ri on the brushes.

In the embodiment of the invention, the finished assemblies U1 to U3 and U4 and U5 are all combined in the same separation device. While they can also be installed in different systems. In the present embodiment, 5 finished assemblies are used, but the number of finished assemblies can be freely selected and determined according to the conditions of production and the characteristics of the rice.

The various parts of the finished product assembly, that is: feeding guide 9a, cylindrical rotating brush device 9b, feeding smooth and regulating device 9c and comb wedge 9d, should be according to the feeding direction of rice grain Ri (E among Fig. 5 and G directions) and other conditions are respectively set in appropriate positions.

When the rice grain Ri falls on the brush, the rice grain Ri jumps, and the impurities pa remaining on the rice grain Ri, such as fine powder, are separated from the rice grain Ri and drawn out along the D direction under negative pressure. The waste gas pipe 13a is discharged to the solid-gas separation device 13 composed of a cyclone or a bag filter. The solid-gas separation device 13 discharges the impurities, and at the same time, the separated air is discharged through the exhaust fan 13b.

A wall 12 surrounds the separating device 9 so as to form a compartment of appropriate size. A continuous shut-off valve such as a rotary valve is arranged at the outlet 11 of the non-washed rice.

The air blower 15 with a suction volume slightly lower than that of the exhaust fan 13b is arranged at the bottom of the separating device 9 . The air from the blower 15 is mixed with the ionized air in the ionized air mixer 15a, and then filled into the compartment of the separation device 9 through the blower air 10, so that the compartment can be placed in a negative pressure to facilitate the separation The fine powder is discharged under the suction of blower 13b.

The static elimination device includes: an ion generating device 14a, a supply device 14b for supplying ionized air ai, a selection valve 14d and a one-way valve 14f.

The feed guide 9a in the finished modules U2 to U5 is slightly different from the feed guide 9a in the finished module U1 in which the plurality of partitions S are arranged parallel to each other.

In addition to screw conveyors, hopper conveyors, and pneumatic conveyors, vibration conveying devices such as electromagnetic vibration methods and motor vibration methods can also be used as conveying devices. The appropriate conveying device should be selected among these conveying devices according to the layout of the non-washing rice processing device and various surrounding conditions.

The bottom plate 9B in FIG. 6 may be constituted by a screen. When a screen is used, the combined effect of the smoothing of the feed and the regulating device reduces the resistance to the upward suction flow.

As a material for making screens, if plastic fibers have sufficient tensile strength, plastic fibers can be used instead of stainless steel wires.

another embodiment

As described in claim 11 and shown in FIG. 7 , the finished assembly includes: a feed guide device 70 , a feed guide auxiliary device 71 , a rotating brush device 72 , and a comb-shaped wedge 73 . The feed guide device 70 is constituted by a permeable net with a sieve structure, and the feed guide auxiliary devices 71 are arranged inclined according to predetermined angles θ1 and θ2, respectively. The end of the feed guide 70 is located above the rotating brush device 72 and forms gaps g1, g2 and g3 so that the rice grains Ri from the feed guide 70 form a stock. The comb wedge 73 continuously cleans the tips of the brushes of the rotating brush device 72 . In this embodiment, all parts are pre-designed to facilitate the installation of each part at a predetermined position.

FIG. 7 shows a schematic side view of a co-finished assembly in another embodiment of the separation device 9 .

As shown in Figure 7, the feeding guide device 70 is arranged obliquely, and the cylindrical rotating brush device 72 (in this embodiment, adopts long and soft bristles as the material for making brushes) is respectively positioned under the feeding guide device 70, Its gaps are g1, g2 and g3. The cylindrical rotating brush device 72 rotates around the shaft 72a in the K direction, and since the brush rotates in the direction opposite to the falling direction of the rice grains Ri from the feeding guide 70, the rice grains Ri are carried on the brush rather slowly. The position of the comb wedge 73 is such that it can continuously clean the brushes of the rotary brush device 72 . In this example, 3 finished modules were used. The feed guide auxiliary device 71 corresponds to each feed guide device 70 . The feed guide device 70 and the feed guide auxiliary device 71 are arranged obliquely, and the angles formed with the vertical wall surface 74 are θ1 and θ2 respectively. In this embodiment, these angles are set to 30 degrees. Since the rice grains from the feeding guide device 70 are in the process of falling, friction occurs at the tip of the brush of the cylindrical rotating brush device 72, so the fine powder positioned on the surface and depressions such as rice bran after roasting just floats up, and these One effect of the brush setting is the easy and effective removal of fine powders.

The different features of this embodiment and the previously described embodiments are as follows: 1) the setting of the feeding guide 70 and the brush makes the outline of the brush intersect with the feeding guide 70 at point A; 2) the feeding guide auxiliary device 71 The end of the brush is inserted slightly into the contour of the brush. To achieve these characteristics, the components of the finished assembly need to be pre-designed and arranged. The separation effect of fine powder such as toasted rice bran on the surface and depressions of rice grains can be enhanced with feature 1) because the fine powder is caught by the brush and rubbed. The function of feature 2) is to regulate the stock of rice grains, and at the same time, it can also strengthen the effect of removing fine powder from the brush together with the function of the comb wedge 73.

As shown in Figure 7, the feed guide 70 is formed of frames 70a, 70b, the frame 70a being made of a rigid material, such as metal. Upstanding edges 70c are provided on both sides of the feed guide 70 . In the same way, the feed guide auxiliary device 71 is composed of a frame 71a and a screen 71b, the frame 70a being made of a rigid material such as metal. The sieve size of the sieve 70b and the sieve 71b is determined in that rice grains cannot pass through the sieve, but the fine powder of the roasted rice bran can pass through the sieve.

Either metal or resin can be used as the material for making the screens 70b, 71b. Ideal materials have high tensile strength and elasticity.

Since the main part of the feed guide 70 and the feed guide auxiliary device 71 are formed in the screen structure, the air supports the upward direction (shown by the arrow H) that separates and sieves the roasted rice bran from the rice grains Ri. ) of ionized air flow. Rice grains Ri move downward along the K direction of the rotating brush and are collected as finished rice. Fine powder Pa such as toasted rice bran is carried by the upward air flow and discharged to the outside of the separation and finishing device.

The dimensions of the main parts in this embodiment are set as follows. The length L1 of the feed guide 70 is 135 mm. The length L2 of the feed guide auxiliary device 71 is 120 mm. The outer diameter of the cylindrical rotating brush device 72 is 70 mm. The diameter d of the shaft 72a is 15 mm. The distance L3 between two adjacent cylindrical rotating brush devices 72 is 100 mm. The length of L4 in Fig. 7 is 30 mm. The width L5 between the two wall panels 74 is 150 mm. The gaps g1, g2, and g3 were set at 15 mm, 10 mm, and 10 mm, respectively.

The dimensions are not limited to the numbers mentioned above, but may be determined according to varying conditions. The number of finished modules is not limited to three as shown in FIG. 7 . The separation device can be arranged vertically as shown in Fig. 7, or arranged obliquely. The layout of the equipment can be freely determined according to the production capacity and installation conditions of the separation device.

With the structure described above, the air intake efficiency and exhaust efficiency can be improved, so that the inside of the branching device can maintain a favorable environment.

In this embodiment, the separation device is accommodated in a box-shaped housing with a vertically upward suction flow. All or part of the vertical walls are formed by hinged doors so that the breakaway unit can be easily serviced.

In order to ensure that the non-washing rice production device is in a safe production state, a safety device that stops the entire operation quickly in an emergency can be set.

In summary, the features of the present invention are as follows;

1) Since no water is used in the process of washing-free rice, the quality of the rice will not deteriorate and the shelf life can be extended.

2) Since roasted rice bran that does not contain other added ingredients is used as an abrasive, it can be used safely without mixing any impurities.

3) By roasting defatted rice bran at high temperature (for example, at 120° C.), hard granular roasted rice bran can be obtained. When toasted rice bran is mixed with polished rice, the bran on the surface of the rice grains can be removed even if the rice has been polished with grit.

4) Since the baked rice bran in the embodiment of the present invention contains 0% water, 0.5% oil, no living microorganisms, no insect eggs, and no bad smell of coarse bran, it is hygienic and ideal of abrasives.

5) Since the surface of the rice grains and the bran contain 20% oil, it is usually difficult to remove the bran. But toasted rice bran, which contains a very small amount of oil, can effectively remove the oil and bran on the surface of the rice grain.

6) Since the toasted rice bran used to polish the rice contains little oil, it is hard and dry and can be easily separated from the polished rice.

7) Since the static electricity generated by the movement of rice grains can be removed by the static electricity removal measures, it is possible to prevent the chaff and impurities from adhering to the polished rice and the inside of the non-washing rice production device, thereby maintaining good conditions in terms of hygiene and rice quality.

8) The inside of the separation device 9 has an upward air flow, and in combination with the static removal measures mentioned in 7), the residual fine powder such as rice bran can be completely removed from the separation device, therefore, the inside of the separation device can be maintained Good conditions, so as to obtain high-quality non-washing rice.

Possibility of industrial application

As mentioned above, the present invention provides a processing method and device for washing-free rice. The method of the present invention uses rice bran (roasted rice bran) during rice polishing that the applicant enjoys a patent (Japanese Patent No. 3453127) as an abrasive to remove rice bran and impurities adhering to the surface of rice grains. The method includes a stirring step, a screening step, a separation step, a recovery and circulation step of rice bran, and a recovery and circulation step of using the collected and recycled rice bran as grinding material. The apparatus of the present invention includes not only means for performing the above steps, but also an electrostatic precipitator for supplying ionized air to remove rice bran and impurities that can prevent these impurities from adhering to the polishing process in subsequent steps up to sieving on the rice.

Claims (10)

1. A processing method for washing-free rice, wherein the washing-free rice does not need to be washed before cooking, comprising the following steps: preparing polished rice obtained by polishing brown rice with built-in white rice polishing equipment and sifting and/or polishing rice from external sources through built-in sieving equipment; prepare polished rice bran as an abrasive; Prepare a mixture consisting of the polished rice and the abrasive, in which the required ratio of the polished rice and the abrasive is used; Stir the mixture in the stirring box by rotating the stirring blade, so that the polished rice and the abrasive are rubbed against each other to remove rice bran and fine powder adhering to the surface of the rice grains. impurities; sieving the agitated mixture to separate the bran from the grains; Separation of adhered rice bran and impurities such as fine powder remaining on the sieved rice grains to obtain finished no-wash rice; and The separated rice bran is recovered as recycled rice bran, and the recycled rice bran is used as abrasive, In said mixing step, if the level of said mixture in said mixing tank is lower than a predetermined level, whether it is at the end of the non-washing rice processing operation, or said mixture is not enough to fill the capacity of the mixing tank, At this time, it is necessary to increase the rotating speed of the stirring blade. 2. The method of claim 1, wherein: The sieving step is carried out in a cylindrical sieving device set at an inclination, the outer contour of the cylindrical sieving device is composed of a screen, and when the mixture flows downward, the The rotation of the provided cylindrical sieving equipment separates the rice bran from the rice grains. 3. The method of claim 1, wherein: The separation step is a step of separating impurities such as fine powder adhering to the surface of the rice grains, and Said separating step is carried out in one or more finished components, each said finished component comprising: Feeding guide device for evenly feeding rice grains; A cylindrical rotating brush device for brushing the surface of rice grains; adjusting means for smoothing the layer of fed rice grains and regulating the stock of fed rice grains; and A comb-shaped wedge for cleaning the brush of the cylindrical rotating brush device; wherein: While adjusting the stock and residence time of the rice grains, the rice grains are evenly fed in the direction opposite to the rotation direction of the cylindrical rotating brush device, so that the rice grains are rubbed by the described cylindrical rotating brush device so as to remove the sticking on the Impurities such as fine powder on the surface of rice grains; Finished rice is discharged as non-washed rice; and The separated impurities such as fine powder are drawn out and discharged through the solid-gas separation device. 4. The method of any one of claims 1-3, wherein: Ionized air from the ion generating device is sent to the sieving step and the separation step to eliminate static electricity to prevent impurities such as fine powder from adhering to the finished rice again. 5. A processing device for washing-free rice, the said washing-free rice does not need to be washed before cooking, including: A polished rice bin for containing polished rice after polishing of brown rice, which is polished by built-in brown rice polishing equipment and sieved by built-in sieving equipment, or using polished rice from an external source; A stirring device for mixing the mixture, mixing the mixture comprising the polished rice and the abrasive by rotating the stirring blades, in which the polished rice and the abrasive are in a required ratio; Conveying means for conveying the stirred mixture including polished rice and rice bran; Sieving device for sieving rice bran from polished rice; a separation device comprising a cylindrical rotating brush device for removing residual impurities such as fine powder from the surface of the rice grains in order to obtain finished non-washed rice; and Rice bran recovery unit for separation of recycled rice bran as abrasive, wherein: Described stirring device comprises: a vertical rotation axis mounted in an upright rotation chamber; A plurality of rotating paddles arranged in multiple layers radially surrounds the vertical rotating shaft; a shut-off valve is disposed at the bottom of said upright spin chamber; and The control device is used to control the rotation speed of the rotating paddle according to the level of the mixture in the vertical rotating chamber, and is used to control the delivery amount of the stirred mixture to the next step. 6. The apparatus of claim 5, wherein: The screening device is a cylindrical screening device arranged obliquely, and the outer contour of the cylindrical screening device is composed of a screen; and One or more guiding parts composed of baffles are arranged obliquely inside the cylindrical sieving device, so that the mixture is sieved while the mixture is rotating and moving downward, and the rice bran is separated from the separated from the rice grains. 7. The apparatus of claim 5, wherein: The separating device is a device for separating impurities such as fine powder adhering to the surface of the sieved rice grains, and Described separation device is made of one or more separation components, and each separation component comprises: Feeding guide device for evenly feeding rice grains; A cylindrical rotating brush device for brushing the surface of rice grains; adjusting means for smoothing the layer of fed rice grains and regulating the stock of fed rice grains; and Comb wedges for cleaning the brushes of rotary brush units; where: Separation of impurities such as fines from rice grains; and The impurities such as fine powder are extracted and discharged through the solid-gas separation device. 8. The apparatus of claim 7, wherein: Described separation assembly also includes: The feeding guide device inclined downwards is composed of a bottom plate and a partition, and the partition is arranged on the end of the bottom plate along the width; The cylindrical rotating brush device is arranged, and a brush is arranged on the cylinder body of the cylindrical rotating brush device under the end of the feeding guide device; wherein: the brush rotates to lift the falling rice grains; The adjustment device is used to adjust the inclination angle of the adjustment device while changing the gap between the cylindrical rotating brush devices according to the feeding amount of rice grains, so as to make the fed rice grain layer smooth and adjust the feeding the stock of rice grains; and A comb-shaped wedge for cleaning the brushes of the cylindrical rotating brush device. 9. The apparatus of claim 7, wherein: Described separation component comprises: feeding guide device; Feeding guide auxiliary device; Cylindrical rotating brush units; and Comb wedge; of which: Both the feeding guiding device and the feeding guiding auxiliary device are arranged at a predetermined inclination angle, and both include a permeable screen with a screening structure; maintaining the gap formed between the end of the feeding guiding device and the end of the cylindrical rotating brush device, so that the falling rice grains are lifted by the rotating brushes on the cylindrical rotating brush device; said comb wedges for cleaning the brushes of said drum rotating brush unit; and All the parts described are pre-designed so that each part can be conveniently installed in the predetermined position. 10. The device of any one of claims 5-7, wherein: The static elimination device is connected with the screening device and the separating device; and The static elimination device includes an ionized air generating device and an ionized air conveying device.

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