JP2004016985A - Method and apparatus for washing rice - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently wash rice by continuously pressurizing, stirring and transporting rice while being sprayed with water, and to reduce the total amount of water for washing rice by reusing the water. <P>SOLUTION: The method for washing rice is carried out by spraying the rice to be washed with clear water, transporting the mixed water while stirring, separating the rice from the washing water, discharging the washing water while introducing the separated rice to a rice washing tank, and transporting the rice as mixed with water to a rice storage tank. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method and an apparatus for washing rice for automatically washing rice.
[0002]
[Prior art]
Conventionally, as a means for separating water from rice washing and rice, there has been proposed an invention of a rice washing apparatus in which a water distribution pipe is continuously connected to a lower portion of a mesh body and a water spraying / spraying section is provided at a lower portion of the mesh body (Japanese Patent Application Laid-Open No. HEI 9-208572). 7-185367).
[0003]
In addition, as a conventionally used apparatus, there is an apparatus that sprinkles water while washing rice passes through a net tube and separates the washed rice from water.
[0004]
Problems to be solved by the present invention
In the above-mentioned conventional apparatus, there is a problem that the amount of water required for washing rice is remarkably increased, so that the amount of wastewater is increased and the amount of treated wastewater is also increased.
[0005]
In addition, even in the rice washing method, the stirring and mixing during the transfer merely deteriorates the rice washing efficiency, which is one of the causes for increasing the amount of water used.
[0006]
In the above-mentioned known invention, water is further sprinkled to increase the amount of water used when separating water and rice.
[0007]
[Means for Solving the Problems]
The present invention differs from the conventional apparatus in that mixing is performed while constantly stirring and mixing and transferring fresh water to the rice to be washed while sprinkling fresh water thereon. That is, by applying the transfer pressure, the rice grains are brought into pressure contact with each other, and the rice grains rub against each other by stirring, so that the rice is washed well and the efficiency can be improved.
[0008]
That is, the method invention sprinkles fresh water on the rice to be washed, moves the mixture of rice and water while stirring, separates the rice and the wash water, drains the wash water, and separates the wash water. This is a rice washing method characterized by putting rice into a rice washing tank and transferring it to a rice storage tank as a mixture of rice and water, by sprinkling the rice to be washed with fresh water and moving the mixture of rice and water. After stirring, the rice and washing water are separated, the washing water is drained, and the separated rice is put into a rice washing tank and transferred to a rice storage tank as a mixture of rice and water to separate the rice and water. Then, a part or all of the separated water is returned to the rice washing tank, and the separated water is circulated and used. Further, the rice to be washed is stirred while being moved in the horizontal direction.
[0009]
In addition, the invention of the apparatus is arranged such that a hopper for charging rice is installed on one side of a rice washing tank having a transfer / stirring means installed on a bottom portion, and a discharge port is connected to a lower portion on the other side, and a discharge port is provided on a lower portion of the discharge port. A rice washing tank with a water pipe is provided, and a rice / water separating means is installed on the top of the rice washing tank so as to face the discharge port, and the rice is fed between the bottom of the rice washing tank and the rice storage tank. A rice washing device characterized by a transfer pipe with a pump interposed, a hopper for charging rice is installed at the top of one side of the rice washing tank with a transfer and stirring means installed at the bottom, and at the bottom of the other side. A discharge port is connected, a rice washing tank with a water supply pipe is provided below the discharge port, and a rice / water separating means is installed above the rice washing tank so as to face the discharge port. A transfer pipe with a rice transfer pump between the bottom of the tank and the rice storage tank. And tubes, the separation means of the US-water to the 貯米 tank provided a rice washing device, characterized in that the drain pipe of the separating means coupled to the rice washing tank.
[0010]
Next, the transfer / stirring means is a screw conveyor provided by providing a spiral blade on one side of the rotating shaft on which the rice is inserted, and a plurality of rows of stirring blades fixed on the other side, and the separating means is The upper end of the drainage pipe is connected to the lower end of the funnel, and the upper part of the funnel is covered with a mesh of meshes through which rice cannot pass.
[0011]
The cone net of the separating means may be a cone net, a pyramid net (for example, four to eight corners), etc., but the fallen rice is automatically rolled and dropped, and solidified water is surely separated and drained. It is desirable.
[0012]
The transfer / stirring means in the above invention must have a pressing force for transfer and a mixing force for stirring. However, as described above, the transfer / stirring means is transferred by, for example, a screw conveyor and stirred by a stirring blade. If a little reed is given to the stirring blade, the transfer force of the stirring blade is also taken into consideration, so that the rice is rubbed while being pressed, and the rice washing effect can be improved.
[0013]
The number of rotations of the rotating shaft in the above is, for example, 50 rpm to 100 rpm, and is intended for agitation washing, and is appropriately determined according to the transfer amount, the outer diameter of the agitation blade, the lead angle thereof, and the like.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention relates to an automatic rice washing method and apparatus which can use as little water as possible and can surely wash the rice.
[0015]
The present invention is a method of washing rice by repeatedly sprinkling and stirring water while transferring the rice in a substantially horizontal direction under pressure.
[0016]
In addition, a rice input hopper is connected to one side of the rice washing tank with transfer stirring means installed at the bottom, a discharge port is provided on the other side, then water and rice are separated, and the rice is dropped into fresh water. The mixture of water and rice is sent to the next rice storage tank, and the wastewater is purified and discharged to the outside world.
[0017]
Rice / water separation is performed again at the upper part of the rice storage tank, and part or all of the separated water is used as necessary water (fresh water) for the rice washing tank, so that water is circulated. Therefore, the required rice washing can be completed with a water amount of 2/3 to 1/3 of the conventional washing water amount.
[0018]
Embodiment 1
An embodiment of the present invention will be described with reference to FIG. Charge the rice into one side of the washing tank, supply fresh water, transfer, agitate, wash the rice, separate the water and the rice, purify the separated water (sedimentation, filtration, etc.) and discharge it. Or a part of it can be used for watering rice washing tank.
[0019]
The separated rice is put into a rice washing tank, mixed with fresh water (or separated water from a rice storage tank), sent to a rice storage tank by a pump, and separated from rice and water again. The whole is returned to the rice washing tank (or the separated water is purified and returned to the rice washing tank), and the others are discharged.
[0020]
In the above, since part or all of the wastewater generated by the water / rice separation in the rice storage tank is reused, the amount of water used for washing rice can be reduced.
[0021]
Embodiment 2
An embodiment of the apparatus according to the present invention will be described with reference to FIGS. In the apparatus of the present invention, a rice washing tank 2 having a U-shaped cross section is horizontally installed on one upper side of a machine frame 1 and a hopper 3 for supplying rice to one upper side of the rice washing tank 2 is installed. A funnel-shaped discharge port 4 is connected to the lower part on the other side, and a rotary shaft 5 is installed in the lower part of the inside of the rice washing tank 2 in parallel with the center line. Are fixed, and a plurality of stirring blades 7 are fixed at equal intervals on the rotating shaft 5 between the terminal end of the spiral blade 6 and the discharge port 4.
[0022]
A rice washing tank 8 is installed on the other upper side of the machine frame 1, and a drain hopper 9 is installed in the rice washing tank 8 so as to face the discharge port 4. A drainage pipe 12 is connected between a lower end of the drainage hopper 9 and a drainage pipe 11 installed vertically outside the rice washing tank, and a drainage pipe 12 is connected to the drainage pipe 12. An overflow box 13 is provided at the upper end of the tube 11.
[0023]
A pump 16 is interposed in a rice feeding pipe 15 connecting the bottom of the rice washing tank 8 and the rice storage tank 20, and a branch pipe 17 with a switching valve 14 is provided. Can be appropriately transferred to the rice storage tanks 20 and 20a. The rice storage tank may be further installed. A drain pipe 50 is connected to the rice sending pipe 15 of the rice washing tank 8 via a valve 49.
[0024]
A drain hopper 18 is provided at the upper part of the rice storage tank 20, and a conical net 19 is provided at the upper part of the drain hopper 18 with a mesh through which rice does not pass. And is branched into a second drain pipe 22 and a return pipe 23.
[0025]
A drainage box 46 is provided between the rice storage tanks 20 and 20a, and overflows to the drainage box 46 when the water level of the rice storage tanks 20 and 20a rises above a predetermined water level. The drainage overflowing to the drainage box 46 is connected to the first drainage pipe 21 via the third drainage pipe 47 and enters the return pipe 23 via the valve 45 or is drained to the outside from the second drainage pipe 22.
[0026]
Part or all of the wastewater from the rice storage tanks 20 and 20a can be supplied to the rice washing tank 8. In the above, when waste water is used, the amount of fresh water used can be significantly reduced.
[0027]
A tip of a water supply pipe 24 is connected to a lower portion of one side of the rice washing tank 8, and a water sprinkling pipe 26 for spraying water to the rice washing tank 2 is connected to a tip of a branch pipe 25 in the middle of the water supply pipe 24. The branch pipe 25 is further connected to a flexible pipe 28 from a branch pipe 27, and the distal end of the flexible pipe 28 faces the upper part of the hopper 3 so that water can be supplied into the hopper 3. Thus, the rice washing device 30 is configured.
[0028]
In the above-described embodiment, the rice is fed from the hopper 3 as indicated by an arrow 31 and when the motor 29 is started, the rotary shaft 5 rotates in conjunction with the shaft of the motor 29. It is moved in the direction of 32 and then stirred by the stirring blades 7,7. In this case, since the rice moves in the direction of arrow 32, the rice moves toward the discharge port 4 while being stirred, and water is sprinkled from the watering pipe 26 as shown by arrow 33. Then, it is pressurized, agitated and washed, and falls from the discharge port 4 onto the conical net 10 as shown by arrow 34, and separated water (dirty water) is discharged from the drain pipe 12 as shown by arrow 35 from the overflow drain pipe. It is discharged to the outside through arrow 11 as shown by arrow 48.
[0029]
On the other hand, the rice enters the fresh water in the rice washing tank as indicated by arrow 36. In the above, the fresh water enters the rice washing tank 8 via the water supply pipe 24 as shown by an arrow 37, and always keeps the overflow water level 38. In this way, the solid material floating on the water surface passes through the overflow casing 13 as shown by arrow 39, passes through the drainage base pipe 11 as shown by arrow 40, and is discharged as shown by arrow 48.
[0030]
When the pump 16 is started, the pump 16 is stored in the rice storage tank 20 via the rice feed pipe 15 as indicated by an arrow 41. In this case, water and rice are separated by the conical net 19 at the upper part of the drain hopper 18, and the separated water passes through the first drain pipe 21 as indicated by an arrow 44, and flows from the second drain pipe 22 and the valve 45 to the outside. It is discharged as indicated by 42 or returned to the rice washing tank 8 via the return pipe 23 as indicated by arrow 43.
[0031]
As described above, by circulating and using clean water, rice washing water can be saved. For example, 1/2 to 1/3 can be saved.
[0032]
【The invention's effect】
According to the present invention, the rice is washed by pressurizing, moving and stirring, so that the rice washing efficiency is improved and the washing time is shortened, so that there is an effect that water can be saved. Also, since the water separated from the rice storage tank is reused, a water saving effect can be expected from this point as well.
[Brief description of the drawings]
FIG. 1 is a block diagram of an embodiment of the present invention.
FIG. 2 is a conceptual diagram of an embodiment of the apparatus.
FIG. 3 is a front view in which a part is omitted and a part is similarly sectioned.
FIG. 4 is a side view partially omitted.
FIG. 5 is a plan view partially omitted.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Machine frame 2 Rice washing tank 3 Hopper 4 Discharge port 5 Rotating shaft 6 Spiral blade 7 Stirring blade 8 Rice washing tank 9 Drain hopper 10, 19 Conical net 11 Drain base pipe 12 Drain pipe 13 Overflow box 15 Rice feed pipe 16 Pump 17 Branch pipe 18 Drain hopper 20 Rice storage tank

Claims (7)

After sprinkling the rice to be washed with fresh water and moving the mixture of rice and water with stirring, separate the rice and washing water, drain the washing water, and put the separated rice in the washing rice tank. A rice washing method characterized in that the rice is transferred to a rice storage tank as a mixture of rice and water. After sprinkling the rice to be washed with fresh water and moving the mixture of rice and water with stirring, separate the rice and washing water, drain the washing water, and put the separated rice in the washing rice tank. A rice washing method comprising transferring rice and water as a mixture of rice and water, separating rice and water, returning part or all of the separated water to the rice washing tank, and circulating and using the separated water. . The rice washing method according to claim 1 or 2, wherein the rice to be washed is mixed and stirred with water while moving the rice in the horizontal direction. At the top of one side of the rice washing tank with transfer and stirring means installed at the bottom, a hopper for charging rice is installed, a discharge port is connected at the bottom of the other side, and a rice washing tank with a water supply pipe is installed at the bottom of the discharge port. A transfer pipe provided with a rice / water separating means at the top of the rice washing tank, facing the discharge port, and a rice feed pump interposed between the bottom of the rice washing tank and the rice storage tank. Rice washing equipment characterized by piping. At the top of one side of the rice washing tank with transfer and stirring means installed at the bottom, a hopper for charging rice is installed, a discharge port is connected at the bottom of the other side, and a rice washing tank with a water supply pipe is installed at the bottom of the discharge port. At the same time, a rice / water separation means is installed at the top of the rice washing tank so as to face the discharge port, and a transfer pipe having a rice feed pump interposed between the bottom of the rice washing tank and the rice storage tank is provided. A rice washing apparatus comprising a pipe, a rice / water separating means provided in the rice storage tank, and a drain pipe of the separating means connected to the rice washing tank. 6. The transfer / stirring means, wherein a screw blade is provided on one side of the rotating shaft on which the rice is inserted to constitute a screw conveyor, and a plurality of rows of stirring blades are fixed on the other side. The rice washing device as described. The rice washing apparatus according to claim 4 or 5, wherein the separation means connects an upper end of the drain pipe to a lower end of the funnel, and covers an upper part of the funnel with a mesh of meshes through which rice cannot pass.

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