JP2001259442A - Waterless type rice cleaning method and waterless type rice cleansing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterless type rice cleaning device which is simple and compact in its structure, is therefore inexpensive and is adequate as a rice cleansing device used in small-scale eating-out industry, restaurants, etc. SOLUTION: A screw conveyor 10 is perpendicularly disposed in a vessel 1 of a vertical type A mixture composed of polished rice and inclusions for rice cleaning is transported upward by the screw conveyor 10, is discharged from an upper discharge opening 13 and is dropped by gravity. This operation is repeated for a prescribed time. The mixture comes into contact with the inside wall of a screw cylinder 11 and the flights of a screw 16 in the state that the mixture is loaded by gravity when the mixture is transported. As a result, the rice bran sticking to the surfaces of the polished rice is separated. The rice bran is further separated by the contact of the grains of the polished rice with each other or the friction contact with the inclusions for rice cleansing. The friction contact of the grains of the polished rice with each other or the friction contact with the inclusions for rice cleansing occurs during the falling as well and the rice bran is separated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anhydrous rice washing method for obtaining pure polished rice which can be cooked as it is, that is, it separates or removes rice bran adhering to the surface of polished rice without using water. The present invention relates to a method and an anhydrous rice washing apparatus used for carrying out the method.

[0002]

2. Description of the Related Art Brown rice from which rice husks have been removed is cooked as it is for health reasons, etc., and is provided for eating. However, in general, a rice milling operation for removing rice bran on the surface of brown rice is added. . When this rice polishing operation is performed, white rice is obtained, but rice bran is mixed in the white rice. Therefore, white rice and rice bran are separated by, for example, a sieve, and the separated white rice is commercially available as polished rice. On the other hand, rice bran is feed for livestock,
It is used as fertilizer. Thus, the rice bran is separated and removed from the white rice, but the remaining rice bran adheres to the surface of the polished rice as is well known. Therefore,
Prior to cooking rice, rice is washed to remove rice bran with water.

[0003] By the way, when rice is washed with water, rice bran pollutes the water, and when drained as it is, it pollutes the environment. Also,
Resources that can be used as livestock feed or fertilizer are also wasted. Therefore, an anhydrous rice washing device for mechanically removing rice bran from the surface of polished rice has been developed, and pure polished rice that does not require washing with water has been distributed.
A screw type anhydrous rice washing device is known as one of the anhydrous rice washing devices being developed. The screw-type anhydrous rice washing apparatus is generally composed of a screw cylinder and a screw provided to be rotationally driven in the screw cylinder. Therefore, if polished rice or polished rice and the rice washing inclusions are supplied to the supply end of the screw, the polished rice or the polished rice and the rice washing inclusions are loaded when transported to the discharge end. In frictional contact with each other. Thereby, rice bran is separated from the surface of the polished rice. Then, when sieved, pure white rice which does not require washing is obtained, and the separated rice bran can be used for feed, fertilizer and the like.

[0004]

As described above, rice can be washed with a conventional screw-type anhydrous rice washing apparatus, but the conventional screw-type anhydrous rice washing apparatus has a frictional contact time with the screw or a rice milling time. In order to sufficiently remove the rice bran by extending the frictional contact time, the distance between the supply start end and the discharge end is increased, that is, the axial length of the screw is increased. Since the shaft length is long, the size of the entire apparatus is increased, and there is a problem of installation space. It is also expensive. Furthermore, the conventional anhydrous rice washing device,
Although the processing amount is 500 kg or more per hour, it is suitable for a large-scale restaurant industry, but has a disadvantage that the business scale of the user is restricted. Therefore, an object of the present invention is to provide an anhydrous rice washing method and an anhydrous rice washing apparatus that can be easily implemented even by a small-scale user, and specifically, a relatively small food service industry, restaurants, hotels, hospitals, and the like. An anhydrous type rice washing method which can be easily carried out in a rice washing apparatus which is simple, compact and therefore inexpensive, and which is suitable as a rice washing apparatus used in small scale food service industries, restaurants, hotels, hospitals, etc. It is intended to provide.

[0005]

The above object of the present invention is attained by a constitution in which a mixture of polished rice and rice washing inclusions is repeatedly conveyed a predetermined number of times or for a predetermined time by a screw having a relatively short axial length. Is done. At this time, the mixture is conveyed upward to apply a predetermined load to the mixture, and is returned to the original position by gravity to convey the mixture a predetermined number of times. That is, in order to achieve the above object, the invention according to claim 1 transfers a mixture of polished rice and rice washing inclusions upward against the gravity by a screw and drops the transferred mixture by gravity. ,
The dropped mixture is transferred upward again by the same screw against gravity, and the transferred mixture is dropped again by gravity, and this is repeated for a predetermined time or a predetermined number of times to wash rice. The invention according to claim 2 is a vertical rice washing container in which a mixture of white rice and rice washing inclusions is put, and a mixture of polished rice and rice washing inclusions sucked from near one end and the other end. A screw conveyor adapted to discharge from the vicinity, wherein the screw conveyor is located in the vertical rice washing container, with one end near the lower end and the other end near the upper end. As described above, the axis is substantially perpendicular. The invention according to claim 3 is a device for supplying polished rice and rice washing inclusions, a vertical rice washing container into which a mixture of polished rice and rice washing inclusions is placed, and a mixture of polished rice and rice washing inclusions. A screw conveyor that sucks in near one end and discharges it from near the other end, and a separation device that separates the washed rice, the rice-washing inclusions, and the rice bran. The white rice and rice washing inclusion supply device is disposed above the vertical rice washing container, and the separation device is disposed below the vertical rice washing container, respectively, and the screw conveyor is provided in the vertical rice washing container. The axis is substantially vertical so that the vicinity of one end is located downward and the vicinity of the other end is located upward.

[0006]

Embodiments of the present invention will be described below with reference to FIG. The anhydrous rice washing device S according to the present embodiment is a milled rice supply device
0 and a rice washing inclusion supply device 20 ′, a vertical rice washing container 1 located below the supply devices 20 and 20 ′, a separation device 30 disposed below the rice washing container 1, and the like. . A screw conveyor 10 is provided in the rice washing container 1 so as to suck a mixture of the polished rice and the rice washing inclusion from near one end and discharge the mixture from near the other end.

The rice washing container 1 has a cylindrical shape as a whole, and the lower part thereof is tapered so that the mixture of the polished rice, the rice washing inclusions and the separated rice bran is guided downward by gravity. I have. A discharge opening 2 is formed at the lower end. Around the discharge opening 2, a flange 3 is attached. In the present embodiment, a slide-type opening / closing lid 4 which is slidably driven in the horizontal direction is provided on the flange 3. Since the opening / closing lid 4 is of a sliding type as described above, compared with the case of providing a double-sided opening / closing lid,
The entire anhydrous rice washing apparatus S is low. This lid 4
Is driven by a driving device such as an air cylinder unit 5 having no problem of odor of hydraulic oil in a direction to close the discharge opening 2 and in a direction to open the discharge opening 2 by a controlled predetermined amount. The upper opening of the rice washing container 1 thus configured is formally closed by a lid 7. A screw conveyor 10 is attached to the center of the lid 7 as described later. The lid 7 has first and second openings 8 and 8 ′ in two places.

The screw conveyor 10 includes a relatively short screw cylinder 11, a screw 16 that is driven to rotate in the screw cylinder 11, and a geared motor 15, for example, that drives the screw 16 to rotate. I have. The screw cylinder 11 has a tubular shape as a whole, as is well known in the related art, but has an opening 12 at the lower end. The lower end 17 of the screw 16 extends below the opening 12 by a predetermined amount. Thus, the mixture of the polished rice and the rice washing inclusions is automatically sucked into the screw cylinder 11 when the screw 16 is driven to rotate. A plurality of discharge openings 13, 13,... Are formed around the upper portion of the screw cylinder 11. A flange 15 is formed integrally with the upper end. Screw cylinder 11 configured as above
In the rice washing container 1, the upper flange portion 14 is attached to the lower surface of the lid 7 such that the opening 12 at the lower end is located near the lower end of the rice washing container 1. Thus, the screw cylinder 11 or the screw 16 is provided so that the axis of the screw is substantially vertical and at the center of the rice washing container 1. The shaft of the screw 16 penetrates the lid 7 upward, and is mechanically connected to the output shaft of the geared motor 15 attached to the gantry.

Since the milled rice supply device 20 and the rice washing inclusion supply device 20 'have the same structure, one milled rice supply device 20 will be described, and the other rice washing inclusion supply device 20' will be described. 'Is the same reference number with a dash "'" and is not described again. The milled rice supply device 20 includes a hopper 21 whose lower part is narrowed in a funnel shape. Then, a mechanical quantitative supply device, for example, a screw type feeder 22 is provided in the narrowed portion. Therefore, by controlling the rotation speed of the screw type feeder 22, the amount of the milled rice supplied to the rice washing container 1 is controlled. The milled rice supply device 20 configured as described above is not shown, with the lower end of the squeezed portion facing the lid 7 and the first opening 8 of the rice washing container 1 above the rice washing container 1. It is attached to the base.

[0010] The separating device 30 comprises a separating container 31 having a substantially square planar shape, and first to third vibrating sieves 41, 42 and 43 provided in the separating container 31. The mesh sizes of these vibrating sieves 41 to 43 are different from each other. Therefore, these vibrating sieves 41 to 43 can be vibrated at a specific frequency in relation to the size of the sieve mesh, but in the present embodiment, the entire separation device 30 vibrates. . That is, the separation container 31 includes a plurality of coil springs 32, 32,
, And a vibrator 33 is attached to a side portion thereof. Then, the first vibrating sieve 41 for separating the polished rice
Is provided at the uppermost part in the separation container 31 so as to be inclined to one side. The second vibrating sieve 42 for separating the rice washing inclusions includes:
Below the first vibrating screen 41, and similarly, the third vibrating screen 43, which separates the rice washing inclusions, is provided below the second vibrating screen 42 in a staggered manner so that the inclination directions are different from each other. ing. Since the first to third vibrating screens 41, 42, and 43 are provided in a staggered manner, the height of the separation device 30 is reduced. The side wall of the separation vessel 31 corresponding to the lower end of the first vibrating sieve 41 is provided with a first discharge slit 32 for extracting pure white rice, and a second and third vibrating sieve 4.
Second and third discharge slits 35 and 36 for discharging the rice washing inclusions are formed in the side wall of the separation container 31 facing the lower ends of the tubes 2 and 43, respectively. The lower end of the separation container 31 is formed in a tapered shape, and a rice bran discharge opening 37 is opened at the lower end. In the separation device 30 configured as described above, the upper part of the first vibrating screen 41 is provided below the rice washing container 1 in a state where mechanical vibration is insulated.
It is provided so as to be located below the discharge opening 2 of the rice washing container 1. The upper part of the separation container 31 is closed by a lid 38.

Next, a method for washing rice using the anhydrous rice washing apparatus S will be described. The polished rice is supplied to the hopper 21 of the polished rice supply device 20 and the hopper 21 ′ of the rice washing inclusion supply device 20 ′.
Inclusions for rice washing, such as bran, paddy, buckwheat hulls, or crushed products of natural food materials such as corn grits and crushed rice that have been subjected to high-speed and high-pressure extrusion sterilization treatment, or extruded fine foaming of natural food materials such as konjac and rice protein Put the rice washing inclusions consisting of body etc. The discharge opening 2 of the rice washing container 1 is closed with the opening / closing lid 4. Then, the screw type feeder 22 of the milled rice supply device 20 is driven at a predetermined speed and at a predetermined rotation speed. This allows
A predetermined amount of polished rice is supplied into the rice washing container 1. At the same time, the screw type feeder 22 'of the rice washing inclusion feeder 20'
Is driven at a predetermined speed for a predetermined number of revolutions. Thus, the rice washing container 1 is mixed with a predetermined amount of the polished rice and the rice washing inclusions.
It is fed into the inside. That is, a mixture of the polished rice and the rice washing inclusions in a predetermined ratio is supplied.

When a predetermined amount of the mixture is supplied or when the supply is completed, the geared motor 15 is started to rotate the screw 16. The mixture is scooped from the lower end 17 of the screw 16 into the screw cylinder 11 and transported upward. When transported, the mixture comes into contact with the inner peripheral wall of the screw cylinder 11 and the flight of the screw 16 under the load of gravity. Thereby, the rice bran attached to the surface of the polished rice is separated. Further, the rice bran is further separated by the contact between the polished rice or the frictional contact with the rice washing inclusions interposed between the polished rice and the polished rice. Then the screw cylinder 11
Are discharged into the rice washing container 1 from the discharge openings 13, 13,. The discharged mixture is placed in a rice washing container 1 by gravity.
Fall inside. When the rice is dropped, the rice bran is separated from the polished rice due to the contact between the polished rice and the frictional contact between the polished rice and the rice washing inclusions interposed between the polished rice and the polished rice. Hereinafter, in the same manner, the transport process by the screw conveyor 10 and the drop process by gravity are performed. This is performed a predetermined number of times or for a predetermined time. The number of times of processing is determined by calculating from the amount of the mixture and the carrying capacity of the screw conveyor 10.

After processing for a predetermined time, the separating device 30 is vibrated by the vibrator 33. Then, the opening / closing lid 4 of the rice washing container 1 is opened by a predetermined amount, and the mixture of the rice bran separated from the polished rice, the polished rice, and the rice washing inclusions is separated by a predetermined amount into the separating device 30.
Supply to fall. The mixture supplied by dropping is sieved by the first vibrating sieve 41, and the sifted top is converted into pure polished rice and discharged to the outside through the first discharge slit. The rice washing inclusions and the rice bran fall and are supplied onto the second vibrating sieve 42 below the sieve. The second vibrating sieve 42 separates relatively large-diameter inclusions for washing rice, and the second discharge slit 35
From the outside, and by the third vibrating sieve 43
The final rice washing inclusions are separated and discharged outside through the third discharge slit 36. The rice bran is discharged from the rice bran discharge opening 37 of the separation container 31. This completes one batch of anhydrous rice washing. By returning the separated rice-washing inclusions to the rice-washing inclusion supply device 20 ', a predetermined amount of the polished rice is washed in a batch manner as described above.

[0014]

As described above, according to the present invention, the mixture of the polished rice and the rice washing inclusions is transferred upward against the gravity by the screw, the transferred mixture is dropped by gravity, and the dropped mixture is dropped. Again by the same screw is transferred upward against the gravity, the transferred mixture is again dropped by gravity, and this is repeated for a predetermined time or a predetermined number of times to wash rice anhydrously, that is, according to the present invention,
The mixture of the polished rice and the rice washing inclusions is conveyed upward by screws and downward by gravity.
The shaft length of the screw is short despite repeated screw processing. Therefore, an effect unique to the present invention that a small-scale user can easily carry out is obtained. Also,
According to another invention, a vertical rice-washing container in which a mixture of polished rice and a rice-washing inclusion is put, and a mixture of polished rice and a rice-washing inclusion is sucked in from near one end and near the other end. A screw conveyor adapted to discharge the screw so that the screw conveyor is positioned in the vertical rice washing container such that one end is located near the lower end and the other end is located near the upper end. , Since its axis is provided substantially vertically, that is, the mixture of polished rice and the rice washing inclusions can be repeatedly processed by the screw, so that the axial length of the screw can be shortened, and gravity Therefore, a special structure for applying the load is not required, and the structure of the screw is simplified. Furthermore, since the screw has a short shaft length, it is compact and inexpensive. Therefore, the small food service industry, restaurants,
An anhydrous rice washing device suitable as a rice washing device used in hotels, hospitals, and the like can be obtained. Further, according to another invention, a milled rice and rice washing inclusions supply device, a vertical rice washing container in which a mixture of milled rice and rice washing inclusions is placed,
A screw conveyor that sucks a mixture of polished rice and rice washing inclusions from near one end and discharges the mixture from near the other end, and separates the washed rice, rice washing inclusions, and rice bran. A separating device, wherein the milled rice and the rice washing inclusion supplying device are arranged above the vertical rice washing container, and the separating device is arranged below the vertical rice washing container, respectively, and the screw conveyor is In the vertical rice-washing container, the axis is substantially vertical so that the vicinity of one end is located downward and the vicinity of the other end is located upward, so that it is provided substantially vertically. In addition to the above effects, the polished rice to be processed is a mixture of the polished rice and the rice-washing inclusions and rice bran from the supply device for the polished rice and the rice washing inclusions to the rice washing container without using any special power. To the separation device Effect that is transferred is obtained. Also,
Pure polished rice can be obtained at the same time.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a partially sectioned anhydrous water washing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

S Rice Washing Device 1 Rice Washing Container 10 Screw Conveyor 11 Screw Cylinder 16 Screw 20 Polished Rice Supply Device 20 'Inclusion Supply Device for Rice Washing 30 Separation Device 41-43 1st
3 vibrating sieve

Claims (3)

[Claims] 1. A mixture of polished rice and rice-washing inclusions is transferred upward against gravity by a screw, the transferred mixture is dropped by gravity, and the dropped mixture is again returned against gravity by the same screw. A water-removed rice washing method, wherein the transferred mixture is dropped again by gravity, and this is repeated for a predetermined time or a predetermined number of times to wash the water anhydrously. 2. A vertical rice-washing container in which a mixture of polished rice and rice-washing inclusions is placed, and a mixture of polished rice and rice-washing inclusions sucked in from near one end and discharged from near the other end. A screw conveyor, wherein the screw conveyor is located in the vertical rice washing container such that one end near the end is located downward and the other end is located near the top, An anhydrous rice washing apparatus characterized in that its axis is provided substantially vertically. 3. A device for supplying polished rice and rice-washing inclusions, a vertical rice-washing container in which a mixture of polished rice and rice-washing inclusions is placed, and a mixture of polished rice and rice-washing inclusions at one end. A screw conveyor that sucks in from the vicinity of the other end and discharges from the vicinity of the other end, and a separation device that separates the rice bran from the purely washed rice, the rice washing inclusions, and the rice bran. The inclusion feeder is above the vertical rice washing container and the separator is below it.
The screw conveyor is arranged in such a manner that its axial center is substantially in the vertical rice washing container so that the vicinity of one end is located downward and the vicinity of the other end is located upward. An anhydrous rice washing device characterized by being provided vertically.