JPH07303456A - Production of rapidly cooked rice and apparatus therefor - Google Patents

Abstract

PURPOSE:To provide a method for producing rapidly cooked rice, which does not need water discharge treating facility such as activated sludge treating facility, nor produce waste water treating expense. CONSTITUTION:This apparatus 1 for producing rapidly cooked rice is composed of a rice-washing device 2, a immersing device 4, cooking devices 3 and 8, a drying device 10 and a waste water tank 12 for housing a waste water discharged from the rice-washing device 2 and cooking devices 3 and 8, etc., and feeding the waste water as the immersing water to the immersing device 4 without discharging the waste water out of the system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing precooked rice.

[0002]

2. Description of the Related Art Rice that can be cooked in a time much shorter than the time required for normal rice cooking, for example, about 1/2, is called precooked rice. This type of rice has traditionally been rice (white rice rice). ) Is known to be dried rice (desired) or dried rice (karei), which has excellent storability, but its water absorption is poor, resulting in a significantly inferior taste and texture. .

[0003]

[Problems to be Solved by the Invention] Therefore, the gelatinized rice grains are formed into flakes or puffs.
It has been attempted to shorten the restoration time (improvement) by improving water absorption by swelling into a shape. In the manufacturing method, rice grains (white rice) are washed and dipped, and the dipped rice grains are steamed and then dried and puffed to produce early-cooked rice.

In the above-mentioned method for producing precooked rice, warm water is used as the immersion water. Therefore, if water having a high concentration is circulated and used, sugar will adhere to the rice grains and deteriorate the taste. Therefore, the immersion water must use the water of low concentration. And, usually, waste water used as soaking water 10 times as much as raw rice grains (white rice) in weight ratio is generated, and the waste water and the waste water discharged from the rice-washing device are cleaned, such as in an activated sludge treatment facility. Wastewater treatment equipment is required,
In addition, there is a drawback that the cost of treating the wastewater is enormous.

It is an object of the present invention to solve the above-mentioned drawbacks and to provide a method and an apparatus for producing precooked rice which eliminates the need for wastewater treatment equipment such as an activated sludge treatment facility and does not incur wastewater treatment costs. And

[0006]

[Means for Solving the Problems] In a method for producing fast-cooked rice, in which rice grains are washed and then immersed, and the immersed rice grains are steamed and then dried, waste water generated by washing and steaming is used as immersion water. And do not drain it out of the system.

[0007] A rice washing device for washing rice grains, a dipping device for soaking the rice grains for a predetermined time, a steaming device for gelatinizing the soaked rice grains, a drying device for drying the gelatinized rice grains, the rice washing device and the steaming device. A waste water tank that stores waste water drained from the above, and supplies the waste water as immersion water to the dipping device so as not to drain to the outside of the system constitutes a device for quick-cooking rice.

[0008]

The rice grains washed by the rice washing device are dipped by the dipping device, and the dipped rice grains are sent to the steaming device and steamed. The rice grains that have been gelatinized by steaming are sent to a drying device and dried and puffed to produce fast-cooked rice. At that time, the waste water discharged from the rice washing device, the steaming device and the like is supplied to the waste water tank, the waste water in the waste water tank is sent to the dipping device and used as the dipping water, and is not discharged to the outside of the system.

[0009]

Embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a flow chart of the fast-cooking rice manufacturing device, Fig. 2 is a schematic diagram of the quick-cooking rice manufacturing device, Fig. 3 is a configuration diagram of the quick-cooking rice manufacturing device, Fig. 4 is a side sectional view of the rice washing machine, and Fig. 5 is a steamer. 6 is a side sectional view of a rotary dipping device, FIG. 7 is a side sectional view of a vibrating carrier, FIG. 8 is a side sectional view of a downflow type cooking device, and FIG. 9 is an abbreviated side sectional view of a horizontal drying device. FIG. 10 is an abbreviated front sectional view of the horizontal dryer.

[0010] The rice washing machine 2 of the fast-cooking rice producing apparatus 1 is replaced with the steaming machine 3
To the rotary dipping device 4 (see FIGS. 2 and 3),
The rotary dipping device 4 is connected to the down flow type steamer 8 via the relay hopper 5, the pump 6 and the vibration transfer device 7, and the down flow type steamer 8 is connected to the horizontal drying device 10 via the vibration transfer device 9. . Reference numeral 11 is a humidifying device for adding water to the rice grains washed by the rice washing machine 2, 12 is a circulation tank for heating waste water discharged from the vibrating conveyer 7 or the like and supplying it again to the rotary dipping device 4, 1
3 is a boiler for generating steam to be supplied to the steam cooker 3, the downflow steam cooker 8 and the circulation tank 12, and 14 is a water supply tank for supplying water to the rice washing machine 2. An upper water level meter 142 and a lower water level meter 143 are attached to the circulation tank 12, and a water supply channel 144 connecting the water supply tank 14 and the circulation tank 12 is connected.
An on-off valve 145 is provided in the (see FIG. 1). Upper limit level 1
42 and the lower limit level meter 143 are control devices (not shown).
The on-off valve 145 is electrically connected via the.

Next, the construction of the rice washing machine 2 will be described with reference to FIG. A horizontally fixed quantity supply screw 16 is connected to the lower part of the supply hopper 15, and the constant quantity supply screw 16 is connected to the motor 1
It is driven by 7 and its transport end is connected to a feed screw 18 formed on the vertical shaft 137.
Feeding tube 1 through which a vertical shaft 137 which is erected substantially vertically is inserted.
9 and the primary rice washing cylinder 20 are continuously provided on the upper and lower sides, and the feeding screw 18 is provided in the upper feeding 19 and the stirring blade 21 is axially attached to the vertical shaft 17 in the primary washing rice cylinder 20. The feed screw 18 and the stirring blade 21 are the vertical shaft 1
7 is rotated by being rotated by the motor 22.

Below the primary washing rice cylinder 20, bearings 23,
Side-feed screw 2 rotatably supported by 24
Install 5 horizontally. The lower part of the connection hopper 26 is connected to the supply port 27, and the discharge end of the lateral feed screw is connected to the discharge port 29 of the discharge gutter 28. The secondary washing rice cylinder 30 and the dehydrating cylinder 31 which insert the transverse feed screw 25 are integrally connected, and the secondary washing rice cylinder 30 and the dehydrating cylinder 31 are rotatably formed. The groove 138 formed in the secondary washing rice cylinder 30 and the pulley 33 of the both-axis motor 32 are connected by the V belt 34, and the other pulley 3
5 and the pulley 37 of the screw shaft 36 are connected by a V belt 38.

Next, the construction of the steam cooker 3 will be described with reference to FIG. The inside of the steamer 3 is stored in the storage chamber 4 by an upright machine frame 39.
No. 0, and the transverse feed screw 4 is provided at the center of the bottom of the storage chamber 40.
A discharge gutter 42 in which 1 is installed is provided, and a discharge port 43 is opened at the discharge end of the discharge gutter 42. A motor 45 is mounted in a mount 44 for fixing the machine frame 39, and a pulley 46 axially attached to the shaft of the motor 45 and a pulley 47 axially attached to the shaft of the transverse feed screw 41 are connected by a V belt 48. A steam pipe 50 having a plurality of holes 49 is horizontally provided below the storage chamber 40,
The steam pipe 50 communicates with the boiler 13. 51 is the storage chamber 40
It is a drain pipe that discharges excess water inside.

Next, the structure of the rotary dipping device 4 will be described with reference to FIG. An impervious rotary cylinder 53 is horizontally provided in the machine frame 52 of the rotary dipping device 4, and one of the rotary cylinders 53 is rotated by a support wheel 55 via an annular body 54 attached to the outer periphery of the rotary cylinder 53. The other is rotatably supported, and the other is rotatably supported by a bearing 58 via a rotary shaft 57 attached to a support plate 56. A spiral blade 59 for conveying rice grains is provided around the inner peripheral wall of the rotary cylinder 53,
A supply gutter 62 having a supply port 61 is connected to the front opening 60 of the rotary cylinder 53. The rear opening of the rotary cylinder 53 is formed in the discharge port 63, and the discharge gutter 64 is connected to the discharge port 63.
Since the rotary cylinder 63 and the support plate 56 are connected by a plurality of connecting rods 65, rice grains are discharged to the discharge gutter 64 from the space formed by the connecting rods 65 and 65. Reference numeral 66 is a motor for rotating the rotary cylinder, and includes a pulley 67 axially attached to the shaft of the motor 66 and a pulley 68 axially attached to the rotary shaft 57.
And 69 are connected by a belt 69. Reference numeral 70 denotes a drain gutter that collects water leaking from the rotary cylinder 53 when the rice grains are immersed, and a drain pipe 71 is connected to the drain gutter 70.

Next, the structure of the vibrating carrier 7 will be described with reference to FIG. The vibrating carrier 9 has the same configuration as the vibrating carrier 7 and is omitted. Supply gutter 73 with the supply port 72 opened
The transport gutter 74 is connected to the bottom of the transport gutter 74, and the lower part of the transport gutter 74 is formed into a transport net 75 having a porous wall. A partition plate 76 that is rotated by a rotating device (not shown) is provided at an intermediate portion of the transport gutter 74, and a discharge port 77 is opened at a discharge end of the transport gutter 74. One of the lower parts of the transport gutter 74 is provided with a pedestal 80 through a spring 78 and a supporting leg 79.
On the other hand, the other is connected to the pedestal 80 via the spring 81, and the vibration device 82 is connected to the transport gutter 74. The drainage chamber 84 of the drainage gutter 83 is connected to the lower side of the transport net 75, and the drainage pipe 85 is connected to the drainage gutter 83.

Next, the construction of the flow-down type steam cooker 8 will be described with reference to FIG. The inside of the cooking chamber 87 is erected by the standing internal machine frame 86.
In the cooking chamber 87, two valve plates 88A and five valve plates 88B are horizontally arranged. Valve plate 88
Is attached to a valve shaft 90 having a plurality of holes 89, and a steam supply pipe 91 is connected to the valve shaft 90. Reference numeral 92 is a torque actuator that rotates the valve plate 88 by the operation of compressed air, and 93 is a solenoid valve control device that supplies and stops compressed air to the torque actuator 92 (see FIG. 1). A space formed by the internal machine frame 86 and the external machine frame 94 is defined as a drainage channel 95, and the drainage channel 95 drains dew condensation water generated on the outer wall of the internal machine frame 86 and the inner wall of the external machine frame 94. Moisture in the steam chamber 87 is discharged to the drainage channel 95 via the drainage pipe 96. The drain gutter 101 in which the upper part of the cooking chamber 87 is connected to the supply port 97 and the lower part is connected to the discharge port 99 of the discharge gutter 98, and the drain port 95 is opened to the drain port 100.
To contact. Further, 140 is a heater for additionally heating the steam supplied to the steam chamber 87, and the heater 140 is the valve shaft 9
Contact 0A and 90B.

Next, referring to FIG. 9 and FIG.
The configuration of will be described. A rotary drying cylinder 104 formed on a porous wall is connected to a rotary shaft 102 horizontally provided in a machine frame 141 of the horizontal drying device 10 via a connecting rod 103. Rotating shaft 102
Both ends of the rotary shaft 1 are supported by bearings 105 and 106.
The pulley 107 axially attached to 02 and the pulley 109 axially attached to the motor 108 are connected by a belt 110. A supply gutter 1 in which a supply port 111 is opened at a supply end of a rotary drying cylinder 104.
12, a discharge gutter 114 having a discharge port 113 opened is connected to the discharge end, and a partition plate 115 for keeping the layer thickness of rice grains constant is provided. An inner space of the rotary drying cylinder 104 is used as a drying chamber 116, and a spiral blade 116 that conveys rice grains is provided around the inner peripheral wall of the rotary drying cylinder 104. A stirring device 117 that stirs the rice grains to prevent binding is provided in the lower part of the drying chamber 135, and the stirring device 117 rotates when the motor 118 rotates.
It is rotated by being transmitted to transmission means such as 19.

Reference numeral 120 denotes a combustion device such as a gas burner,
The combustion device 120 communicates with the rotary drying cylinder 104 via the blower fan 121 and the air supply chamber 122, and the rotary drying cylinder 104 communicates with the exhaust pipe 126 via the exhaust chamber 123, the exhaust air passage 124, and the exhaust fan 125. The exhaust chamber 123 is connected to the blower fan 121 via the return air passage 127 to form a circulation air passage, and the return air passage 127 is connected to the supply air passage 128.
Further, reference numerals 129 and 130 are dampers for adjusting the supply air and the discharge air. Reference numeral 131 is a drain gutter that collects water discharged from the rotary drying cylinder 104, and a drain pipe 132 is connected to the drain gutter 131.

Next, the operation of the above configuration will be described. Raw milled rice (water content 13.4) put into the supply hopper 15.
%) Is fed by the constant quantity feeding screw 16 into the cylinder 1
The rice grains in the feeding cylinder 19 are continuously fed in a constant amount into the inside 9, and are fed by the feeding screw 18 to the primary rice washing cylinder 20 below. The rice grains in the primary washing rice cylinder 20 are
The water for washing rice supplied from the water supply nozzle 133 is agitated by the agitating blade 21, and the agitating action causes the aleurone layer of the rice grain surface layer to dissolve into the water. The rice grains mixed with water, which have been subjected to the primary washing rice in 5 to 6 seconds, fall from the lower end of the primary washing rice cylinder 20 into the connecting hopper 26 and flow into the secondary washing rice cylinder 30 from the supply port 27. The rice grains and water are agitated by the secondary washing rice cylinder 30 which rotates at a high speed, and the transverse feed screw 25 which rotates at a higher speed than the secondary washing rice cylinder 30 and rotates in the same direction.
Is conveyed to the discharge port 29 side. Secondary washing effect of about 4
The rice grains received for a second are dehydrated by the dehydration cylinder 31,
The adhered water is removed together with the water that has been washed, and the dehydrated water flows down from the drainage chamber 139 to the drain gutter 134 and is then discharged to the outside of the machine. The rice grains (water content 15.3%) dehydrated by passing through the dehydration cylinder 31 are discharged from the discharge port 29 through the discharge gutter 28 to the outside of the machine.

The rice grains discharged from the rice washing machine 2 are humidified by the humidifier 1
1, the water content is added, and the water content of the rice grain is increased to 20% by this water addition.

The rice grains to which the moisture has been added by the humidifier 11 are put into the storage chamber 40 of the steamer 3 and steamed by the steam ejected from the holes 49 of the steam pipe 50 while flowing down in the storage chamber 40. The steam is jetted downward from the steam pipe 50, but since the steam is light and has the property of rising, the steam pipe 50
Even the rice grains stored above are steamed by the steam rising between the rice grains. The steam pressure of the steam ejected from the steam pipe 50 is 3.0 kgf / cm ² , and the rice grains are stored for about 10 minutes and steamed in the storage chamber 40. The steamed rice grains (water content rises to 28.5%) are conveyed by the horizontal feed screw 41 and discharged from the discharge trough 42 to the discharge port 4.
It is discharged from the machine after passing 3. By performing the primary steaming (preliminary steaming) with this steaming machine 3, the water absorption speed in the next immersion step becomes faster. In addition, the rice grains are partially gelatinized by this primary steaming.

The rice grains cooked by the steamer 3 are supplied from the supply port 61 of the rotary dipping device 4 through the supply gutter 62 into the rotary cylinder 53, and the immersion water (80 ° C.) is supplied from the circulation tank 12. It is supplied to the gutter 62 and is similarly supplied into the rotary cylinder 53. The rice grains supplied into the rotary cylinder 53 are immersed in warm water when being conveyed to the discharge side in the rotary cylinder 53 by the spiral blade 59. The rice grain is immersed in the rotary cylinder 53 for about 20 minutes, and the rice grain (water content 4
(Increased to 5.8%) flows down the discharge trough 63 from the discharge port 63, and is sent from the relay hopper 5 to the vibration carrier 7 by the pump 6. In this way, by soaking with the rotary dipping device 4, the rice grains have a high water content, the α-formation in the subsequent secondary steaming proceeds rapidly, and the swelling becomes large.

Next, the immersion water supplied to the rotary immersion device 4 will be described (see FIG. 1). The washing water used in the rice washing machine 3 is sent from the drain gutter 134 to the water supply tank 14, tap water is added to the clear water of the water supply tank 14, and the water is supplied to the rice washing machine 2 by a pump and reused as rice washing water. It
The water in the water supply tank 14 is regularly drained and supplied to the circulation tank 12. Further, to the circulation tank 12, waste water drained from the drain pipe 51 of the steam cooker 3, waste water drained from the drain pipe 85 of the vibration transporters 7 and 9, and drainage from the drain port 100 of the downflow steam cooker 8. Waste water to be discharged or waste water discharged from the drain pipe 132 of the horizontal drying device 10 is supplied.

The waste water supplied to the circulation tank 12 is heated by steam from the boiler 13 and heated to raise the temperature (normally polished rice is about 80 ° C., parboiled rice is about 75 ° C.).
The waste water is used as immersion water sent to the rotary immersion device 4 by a pump. Then, the wastewater in the circulation tank 12 is supplied to the rotary dipping device 4 so that the water level is the lower limit level meter 1
When the position 43 is reached, the open / close valve 145 is opened by the detection signal from the lower limit level meter 143. By opening the on-off valve 145, the waste water in the water supply tank 14 is supplied into the circulation tank 12 via the water supply passage 145. When the level of wastewater in the circulation tank 12 reaches the position of the upper limit level meter 142,
The open / close valve 145 is detected by the detection signal from the upper limit level meter 142.
Is closed, and the supply of waste water from the water supply tank 14 to the circulation tank 12 is stopped. In this way, the water tank 1
The water levels in 4 and the circulation tank 12 are maintained substantially constant. The immersion action in the rotary immersion device 4 causes SS in water
(Floating substance) adheres to the surface of the rice grain, and the rice grain to which SS has adhered is sent to the vibration conveyor 7 in the next step. S attached to rice grains
The S is removed from the surface of the rice grain by the drying action of the horizontal drying device 10 in the final step and the grain-friction action by the rotation 104 such as rotation drying, and is discharged to the outside by the exhaust fan. In this way, the wastewater discharged from the rice washing machine 3 and the steaming machines 3 and 8 is not discharged to the outside of the system for the production process of precooked rice, so that the activated sludge treatment facility etc. which has been conventionally required is not required. No wastewater treatment equipment is required. In addition, the BO in the water supply tank 14
D (biochemical enzyme requirement) and SS are 20,000P
Stable with PM, BOD and SS in the circulation tank 12 are 4
It is stable at 50,000 to 50,000 PPM.

The rice grains and water are introduced into the supply port 72 of the vibrating carrier 7, dropped from the supply gutter 73 onto the carrier net 75, and then flowed down to the discharge port 77 side. At that time, the rice grain is the partition plate 76
Is retained on the vibrating net 75 for a certain time by the vibrating device 82.
Draining is performed by vibrating action by. The drained water is discharged into the drainage chamber 84 from the holes of the transport net 75, flows down the drainage gutter 83, and is discharged from the drainage pipe 85 to the outside of the machine. When the rice grains at the uppermost stage of the flow-down type steamer 8 in the next step are dropped, the rotating device (not shown) is operated to rotate the partition plate 76, so that the drained rice grains are transferred to the transport gutter 77. It flows down and is discharged from the discharge port 77 to the outside of the machine.

The rice grains drained by the vibrating carrier 7 fall into the cooking chamber 87 from the supply port 97 of the downflow type steamer 8 and are accumulated on the valve plate 88B. When the accumulation is completed, the valve plate 8 is closed.
8A is rotated halfway, and the hole 8 of the valve shaft 90 of the valve plate 88A
The rice grain layer is steamed by the steam injected from 9. When the rice grains on the valve plate 88B are cooked for a predetermined time, the valve plate 88B halves and the rice grains drop and accumulate on the valve plate 88A, and when the accumulation ends, the valve plate 88B halves.
The rice grains are cooked by the steam injected from the hole 89 of the valve shaft 90 of the valve plate 88B. In this way, the valve plate 88
By alternately rotating A and the valve plate 88B,
The rice grains flow down through the steaming chamber 87 while being steamed. In addition,
The thickness of the rice grain layer is formed to be smaller than the radius of the valve plate 88 (about 5 cm in this embodiment) so that the rice grains can be reliably dropped when the valve plate 88 is half-turned. The steam temperature is 100 ° C., the steam pressure is 7.5 kgf / cm ² , the steaming time is 20 minutes, and the water content after steaming rises to 53.2%. By the way, the rice grains flowing down in the steaming chamber 87 become softer in the surface due to the steaming and the rice grains are bound to each other, so that the flow of the rice grains in the post-process after the steaming becomes worse. Therefore,
This binding is prevented by heating a part of the steam supplied to the falling steamer 8. That is, part of the steam supplied to the downflow-type steamer 8 is additionally heated by the heater 140, and the heated steam is supplied into the steaming chamber 87 through the holes of the valve shafts 90A and 90B. Since the steam is heated by the heater 140, the relative temperature is lowered, and the relatively dry air is supplied to the rice grains due to the lowering of the relative temperature. As a result, the surface of the rice grains is dried to prevent the rice grains from binding to each other, and the flow of the rice grains in the next step is improved. Then, the cooked rice grains flow down the discharge gutter 98 and are discharged from the discharge port 99, are supplied to the vibration carrier 9 to be drained, and the rice grains that are easily bound by steaming are separated. Be seen. In addition, the rice grains are almost completely α by this secondary steaming.
Be converted.

The rice grains that have been drained by the vibration carrier 9 are introduced into the supply port 111 of the horizontal dryer 10 and then flow down through the supply gutter 112 to be supplied into the drying chamber 135.
The rice grains supplied into the drying chamber 135 are the rotary drying cylinder 104.
It is transferred in the drying chamber 135 as the spiral blade 116 rotates and is dried by the drying air during the transfer. Air supply passage 1
The air sucked from 28 is heated by the combustion device 120, and the heated dry air is blown from the air supply chamber 122 to the drying chamber 135 by the blower fan 121. Dry air that has dried the rice grains in the drying chamber 135 is discharged from the exhaust chamber 123 to the outside of the machine through the exhaust air passage 124 and the exhaust fan 125 through the exhaust pipe 126. Further, in order to reduce the combustion cost, it is possible to adjust the damper 130 and the damper 129 to form a circulation air passage to reuse the dry air. From the supply side, the drying chamber 135 has a first drying block 136A, a second drying block 136B, a third drying block 136C,
Fourth drying block 136D, fifth drying block 136E
The temperature of the dry air in each of the drying blocks 136 is appropriately adjusted. That is, since the rice grains have a high water content at the initial stage of drying, the rice grains are dried at a relatively high temperature, and at the end of the drying process, the rice grains have a low water content. In this embodiment,
The temperature of the drying air of the first drying block 136A is 275 ° C,
The second drying block 136B has a temperature of 270 ° C., the third drying block 136C has a temperature of 240 ° C., and the fourth drying block 136D has a temperature of 2 ° C.
The temperature of 00 ° C. and the fifth drying block 136E is adjusted to 195 ° C., respectively, and the first drying block 136A and the second drying block 136B mainly perform the puffing action, and the third drying block 136C, the fourth drying block 136D and the fifth drying block 136C. In block 136E, a drying operation is mainly performed. Draining is performed in the first drying block 136A, and the drained water is drained from the hole of the rotary drying cylinder 104, flows down the drain gutter 131, and is drained from the drain pipe 132 to the outside of the machine. The rice grains that have been dried in the fifth drying block 136E pass over the partition plate 115, flow down the discharge gutter 115, and are discharged from the discharge port 113 to the outside of the machine. In this embodiment, the drying time in the horizontal dryer 10 is about 5 minutes, and the water content of the rice grains after the completion of drying is 6.3%.

The steam pressure and steaming time in the steam cookers 3 and 8, the water temperature and soaking time in the dipping device 4, the temperature and the drying time of the drying air in the drying device 10, and the finishing water content of the rice grains are the same as those in this embodiment. There is no limitation, and various settings can be made.

Further, in the present embodiment, the steaming is performed twice, but the steaming is not limited to this, and the steaming may be performed once or three times or more.

[0030]

EFFECTS OF THE INVENTION According to the method and apparatus for producing fast-cooked rice of the present invention, the waste water generated by washing and steaming rice is used as immersion water. The wastewater is attached to the surface, the SS is removed by the drying action and the granular friction action, and the wastewater is purified, so that the wastewater is not discharged to the outside of the system for the production of precooked rice. Therefore, wastewater treatment equipment such as activated sludge treatment facility, which was required in the past to produce fast-cooked rice, is completely unnecessary, and the equipment cost of the apparatus for producing fast-cooked rice is significantly reduced and Since no processing cost is incurred, the running cost can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a flow chart of the rice cooked early.

FIG. 2 is a schematic view of an apparatus for producing fast-cooking rice.

FIG. 3 is a block diagram of an apparatus for producing early-cooked rice.

FIG. 4 is a side sectional view of the rice washing machine.

FIG. 5 is a side sectional view of the steamer.

FIG. 6 is a side sectional view of a rotary dipping device.

FIG. 7 is a side sectional view of the vibrating carrier.

FIG. 8 is a side sectional view of a downflow-type steaming machine.

FIG. 9 is an abbreviated side sectional view of a horizontal drying device.

FIG. 10 is an abbreviated front sectional view of a horizontal dryer.

[Explanation of symbols]

 1 Fast-cooking rice manufacturing device 2 Rice washing machine 3 Steaming machine 4 Rotating dipping device 5 Relay hopper 6 Pump 7 Vibration carrier 8 Downflow steamer 9 Vibration carrier 10 Horizontal dryer 11 Circulation tank 13 Boiler tank 14 Boiler tank 15 Water tank 15 Feeding hopper 16 Fixed amount feeding screw 17 Motor 18 Feeding screw 19 Feeding barrel 20 Primary washing rice barrel 21 Stirring blade 22 Motor 23 Bearing part 24 Bearing portion 25 Horizontal feeding screw 26 Connecting hopper 27 Feeding port 28 Discharge gutter 29 Discharging port 30 Secondary washing rice canister 31 Groove 32 Double Shaft Motor 33 Pulley 34 V Belt 35 Pulley 36 Screw Shaft 37 Pulley 38 V Belt 39 Machine Frame 40 Storage Chamber 41 Side Feed Screw 42 Discharge Trough 43 Discharge Port 44 Frame 45 Motor 46 Pulley 47 Pulley 48 V Belt 49 Hole 50 steam 51 Drain Pipe 52 Machine Frame 53 Rotating Cylindrical Body 54 Annular Body 55 Supporting Wheel 56 Support Plate 57 Rotating Shaft 58 Bearing 59 Spiral Blade 60 Opening 61 Supply Port 62 Supply Gutter 63 Discharge Gutter 64 Connection Gutter 65 Connection Rod 66 Motor 67 67 Pulley 68 Pulley 69 Belt 70 Drain gutter 71 Drain pipe 72 Supply port 73 Supply gutter 74 Conveyor gutter 75 Conveyor net 76 Partition plate 77 Discharge port 78 Spring 79 Support leg 80 Frame 81 Spring 82 Vibration device 83 Drain gutter 84 Drain chamber 85 Drain tube 86 Internal machine Frame 87 Steaming chamber 88 Valve plate 89 Hole 90 Valve shaft 91 Steam supply pipe 92 Torque actuator 93 Electromagnetic valve control device 94 External machine frame 95 Drainage channel 96 Drainage pipe 97 Supply port 98 Discharge gutter 99 Discharge port 100 Drainage port 101 Drain gutter 102 rotary shaft 103 connecting rod 104 rotary drying cylinder 10 Bearing part 106 Bearing part 107 Pulley 108 Motor 109 Pulley 110 Belt 111 Supply port 112 Supply gutter 113 Discharge port 114 Discharge gutter 115 Partition plate 116 Spiral blade 117 Stirrer 118 Motor 119 Belt 120 Combustion device 121 Blower fan 122 Air supply chamber 123 Exhaust Chamber 124 Exhaust air duct 125 Exhaust fan 126 Exhaust pipe 127 Return air duct 128 Air supply air duct 129 Damper 130 Damper 131 Drain gutter 132 Drain pipe 133 Water supply nozzle 134 Drain gutter 135 Drying chamber 136 Dry block 137 Vertical shaft 138 Drain section 139 Heater 141 Machine frame 142 Upper limit level meter 143 Lower limit level meter 144 Water supply channel 145 Open / close valve

Claims (2)

[Claims] 1. A method for producing fast-cooked rice, comprising washing rice grains after soaking, soaking the rice grains in steam, and then steaming and drying the soaked rice grains, wherein waste water generated by washing and steaming is used as immersion water outside the system. A method for producing precooked rice which is characterized in that it is not drained. 2. A rice washing device for washing rice grains, a dipping device for dipping the rice grains for a predetermined time, a steaming device for gelatinizing the soaked rice grains, a drying device for drying the α-rice grains, the rice washing device and the above. An apparatus for producing fast-cooked rice, comprising: a waste water tank that stores waste water drained from a steamer or the like and that supplies the waste water as immersion water to the immersion apparatus and does not drain it out of the system.