JPH0568897A - Washed rice working device - Google Patents

Abstract

PURPOSE:To finish polished rice into excellently cleaned rice by providing both a dryer for drying dehydrated polished rice and an agitating polishing machine by which the dried polished rice is polished grain by grain. CONSTITUTION:Washed polished rice is sent to a dehydrator 9 and supplied to a cleaned rice chamber 26. Herein a bran layer remaining in polished rice is separated. Water containing bran which is eluted from polished rice is discharged through the holes of a perforated-wall drum 28. Polished rice is rewashed by water and rehydrated in a dehydration chamber 29. Then the dehydrated polished rice is introduced into the perforated-wall rotary drum 49 of a horizontal dryer 45. When polished rice is agitated and fluidized in the rotary drum 49 by a screw conveyor 48, it is dried by dry wind supplied from a vent cylinder 53. The dried polished rice is introduced into the supply tank 59 of an agitating polishing machine 58 and horizontally sent to a polishing chamber 68 by a spiral rotor 63. Herein polished rice is rubbed grain by grain by agitating action based on rotation of an agitation rotor 65 and the surface of grain of rice is smoothed. At this time, moisture still on the surface of polished rice is dried by bran removing wind.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice washing processing apparatus for producing so-called unwashed rice which does not require washing rice prior to cooking rice.

[0002]

2. Description of the Related Art Most of the bran removed from the white rice refined by a rice polishing machine is removed in the process of whitening, but fine bran still adheres to the white rice. If you cook the rice as it is, it will be cooked into bran-like rice, so it was necessary to wash the white rice before cooking. However, this rice washing is time-consuming and troublesome, and tends to be disliked by housewives at home. Therefore, there has been a demand for white rice (so-called unwashed rice) that can be cooked by adding water directly without the need for washing rice.

The applicant of the present invention has already proposed a rice washing processing apparatus for producing non-washed rice (Japanese Patent Laid-Open No. 10646/1993). This is a structure in which a rice washing machine and a dehydrator are connected to a subsequent step of the rice polishing machine, and the whitened rice is washed in the rice washing machine, dehydrated, and processed into non-washed rice.

Another apparatus for producing non-washed rice is a moistening rice polishing machine, which grinds the polished rice by grain rubbing while adding (humidifying) water to the white rice polished by the rice polishing machine.

[0005]

However, in the above-mentioned rice washing processing apparatus, the water attached to the surface of the white rice is removed by the dehydrator, but the water cannot be completely removed by the dehydrator alone. Furthermore, water is ubiquitous on the surface of white rice,
This causes cracks on the surface of the white rice, and when the rice is cooked, it loses its shape and is cooked as sticky rice.

Further, in the above-mentioned humidified rice polishing machine, the bran (paste layer) remaining on the white rice becomes viscous due to the humidified polishing,
The surface of white rice is covered with bran. As a result, water absorption during dipping and cooking is hindered, resulting in a hard and unsatisfactory rice cooked rice, and the rice cooked has a defect of bran.

The present invention solves the above drawbacks,
The purpose of the present invention is to provide a rice washing processing device that prevents cracks from being generated on the surface of white rice by drying and grain-grinding dehydrated white rice with a drier and a stirring and abrading machine, and finishes the washed rice to be beautiful and tasty. And

[0008]

[Means for Solving the Problems] A rice washing machine for washing white rice to remove bran, a dehydrator for removing moisture adhering to the surface of washed rice, and a dryer for drying dehydrated white rice,
A washing machine is formed with a stirring grinder that grinds dried white rice by mounting a stirring rotator on a main shaft rotatably provided in a porous wall cylinder.

In the dryer, a perforated wall rotary cylinder is rotatably provided in a casing, and an opening of a supply cylinder provided in the rotary cylinder is provided close to the rotary cylinder.

[0010]

In the rice washing machine, the white rice is washed with water to remove the bran, and the washed white rice is dehydrated by the dehydrator to remove the water adhering to the surface of the white rice. The dehydrated white rice is surely dried by the hot air from the cylinder of the dryer, and the dried white rice is sent to the stirring and polishing machine and is ground by the rotation by the stirring rotator.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a flow chart of a rice washing processing apparatus embodying the present invention, FIG. 2 is a partial side sectional view of a stirring and polishing machine, FIG. 3 is a side sectional view of a rice washing dehydrator, FIG. 4 is a front sectional view of a horizontal dryer, and FIG. ,
6 and 7 are enlarged cross-sectional views of white rice.

The feed hopper 2 of the rice washing apparatus 1 is connected to a mixing tank 4 via a rotary valve 3, and the mixing tank 4 is fed to a rice washing / dehydrating machine 9 via a rice washing machine 8 consisting of pumps 5, 6 and 7. I have reached 10. The rice washing machine is not limited to the one used in this embodiment, and may be any of various types such as washing rice by stirring.

Next, the rice washing and dehydrating machine 9 will be described with reference to FIG. A motor 12 is provided on one side wall of a stand 11 of the rice washer / dewaterer 9.
The pulley 13 mounted on the motor 12 is attached to the belt 1
4 is connected to a pulley 16 mounted on a main shaft 15. The pulley 17 is a hollow rotary shaft 1 via a belt 18.
Reference numeral 21 denotes a tension pulley, which is connected to the pulley 20 of 9. The main shaft 15 is connected to the stirring body 23 via the connecting shaft 22, and the connecting body 24 attached to the stirring body 23 is connected to the rice washing cylinder 25. Reference numeral 26 denotes a rice washing chamber. A spiral blade 27 for lifting is attached to the outer periphery of the rice washing cylinder 25, and a dehydration chamber 29 is formed by the rice washing cylinder 25 and a perforated wall cylinder 28 surrounding the spiral blade 27. The perforated wall cylinder 28 is connected to the rotary shaft 19 via a rotary base 30, and the upper end of the spiral blade 27 communicates with a discharge gutter 32 via a discharge port 31. A nozzle 33 provided on the rice washing cylinder 25 faces the dehydration chamber 29, the nozzle 33 communicates with a water supply pipe 37 through a water storage chamber 34, a passage 35, and a water supply passage 36, and 38 indicates a supply pipe 10 and a rice washing chamber 26. It is a supply route to communicate with. Denoted at 39 is a discharge port for collecting and discharging dewatered water, and the discharge port 39 communicates with the viable cell purification device 41 via a discharge cylinder 40 and a solenoid valve 60. An air shutter 43 is provided on a discharge tube 42 connected to the discharge trough 32, and a lower portion of the discharge tube 42 is formed as a porous wall to which water droplets fall.

The discharge cylinder 42 of the rice washing / dehydrating machine 9 is connected to the supply cylinder 46 of the horizontal dryer 45 via the rotary valve 44. The horizontal dryer 45 has a casing 47 in which a perforated wall rotary cylinder 49 around which a screw conveyor 48 is provided is provided, and the perforated wall rotary cylinder 49 is horizontally suspended on the discharge side. The outside air communicates with the cylinder 53 through the filter 50, the fan 51, and the heater 52, and the opening 54 of the cylinder 53 is provided in the vicinity of the multi-walled rotary cylinder 49 so as to face the flux of white rice (FIG. 4). reference). An exhaust pipe 55 is provided above the casing 47, and an exhaust pipe 56 is provided below the casing 47, and a rotary valve 57 attached to the exhaust pipe 56 is connected to the supply tank 5 of the stirring and polishing machine 58.
Contact 9.

A spiral rotor 63 and a stirring rotator 65 having a stirring protrusion 64 are axially mounted on a main shaft 62 rotatably provided in a side wall 61 of a stirring and polishing machine 58 installed side by side. The individual ventilation holes 66 are provided in the stirring rotator 65, and the air blowing ports 67 are respectively provided. One end of the polishing chamber 68 formed by the stirring rotator 65 and the perforated wall cylinder 61 is connected to the supply port 69 and the other end is connected to the discharge port 70. A shutter 71 is provided above the supply port 69 and the discharge port 70 is provided. Is provided with a resistance lid 73 connected to the resistance device 72. An air supply port 74 is opened at one end of the main shaft 62, and an air exhaust chamber 75 below the perforated wall tube 61 communicates with an air exhaust unit 77 via an air exhaust tube 76. A pulley 79 mounted on a motor 78, a pulley 80 mounted on a main shaft 62, and a belt 81 are wound, and a discharge gutter 82 of an agitating / grinding machine 58 is attached to a grain lifting machine 8.
Contact 3.

The viable cell purification apparatus 41 comprises a raw water tank 84, a flocculating tank 85 for adding a flocculant (for example, CaCl2, etc.), a flocculating sedimentation tank 86, and an activated sludge tank 87 for adding activated sludge bacteria.
And a settling tank 88.

Next, the operation of the above configuration will be described. First, when water is poured into the mixing tank 4 from a water supply device (not shown) and a certain level of water is stored in the mixing tank 4, the white rice in the supply hopper 2 is intermittently discharged by the rotary valve 3 and mixed. It is put into the tank 4 and mixed with water. The white rice is pre-washed by the pumps 5, 6 and 7 of the rice washing machine 8, and the washed white rice is sent to the rice washing and dehydrating machine 9.

The white rice sent to the washing and dehydrating machine 9 is supplied to the supply pipe 1.
It is supplied to the rice washing chamber 26 from 0 through the supply passage 38. When the motor 12 is activated, the rice washing cylinder 25 is about 1,500 to 2,000 per minute.
The agitator 23 is rotated by 0 rotation, and the white rice supplied to the rice washing chamber 26 is subjected to a rice washing action. The bran layer remaining in the white rice is separated and eluted by the rice washing action, and the washed white rice is removed by the spiral blade 27 in the dehydration chamber 29.
Is pumped inside. At that time, dehydration is performed by the perforated wall cylinder 28 rotating about 100 rotations slower than the rice washing cylinder 25,
The water containing the bran eluted from the white rice is discharged from the holes of the perforated wall cylinder 28. In the dehydration chamber 29, initial dehydration is performed in the lower part first, and then the white rice is rewashed by water injection from the nozzle 33 facing the dehydration chamber 29 to remove adhered substances such as bran remaining on the surface of the white rice. The washed and rewashed white rice is pumped and re-dehydrated. The residence time of the white rice in the washing and dehydrating machine 9 is 2 to 10 seconds, and the water content of the white rice is increased by 1.5 to 2% with respect to the water content of the raw rice. The discharged rice rinsing waste water is collected in the discharge port 39, flows down the discharge cylinder 40, and the solenoid valve 6 is discharged.
When it is opened 0, it is discharged to the outside of the machine and sent to the viable cell purification device 41. After washing the rice, when washing the rice washing dehydrator 9, the air shutter 43 is closed to prevent the water from flowing to the subsequent steps, and then the water is supplied.

In the above-mentioned conventional humidified rice polishing machine, about 0.3 to 0.5% of the dry matter of the white rice is removed, but the dry matter removed by the rice washing and dehydrator 9 is 0.7 to 0.5%. It is about 1.2%, and most of the aleurone layer is removed.

The dehydrated white rice is pumped by the spiral blade 27, discharged from the discharge port 31, and discharged from the discharge gutter 32 to the discharge cylinder 4.
2, is discharged intermittently by the rotary valve 44, and is fed from the supply cylinder 46 to the perforated wall rotary cylinder 49 of the horizontal dryer 45.
It is thrown in. When the white rice is agitated and flowed in the porous wall rotary cylinder 49 by the screw conveyor 49,
It is dried by the dry air (40 ° to 50 ° C.) supplied from No. 3. Since the opening 54 of the supply cylinder 46 is provided in the vicinity of the perforated wall rotary cylinder 49, the dry air can surely dry the white rice, and the drying efficiency can be greatly improved. Then, the polished rice is discharged from the discharge port 56 by the rotary valve 57, and the dry air is discharged from the exhaust pipe 55 to the outside of the machine.
The residence time of the white rice in the horizontal dryer 45 is 3 to 30 seconds, and the water content of the white rice is dried to a value increased by 0.7 to 1.5% with respect to the water content of the raw rice. The dried white rice is intermittently discharged by the rotary valve 57 and then put into the supply tank 59 of the stirring and polishing machine 58. The white rice put into the supply tank 59 is supplied from the supply port 69 to the spiral rotator 63 by opening the shutter 71, and is laterally transferred to the polishing chamber 68 by the spiral rotator 63. In the polishing chamber 68, the stirring rotator 65
Due to the stirring action by the rotation of (circumferential speed of 100 to 300 m / min), the polished rice is rubbed into grains and the surface of the grains becomes smooth.

The outside air is sucked from the air supply port 74 by the suction action of the blower 77 to become bran-free air.
The gas is ejected from the air outlet 67 into the polishing chamber 68 through the second air outlet 66. The white rice is ground and abraded while being stirred and flowed in the polishing chamber 68, and the moisture remaining on the surface of the white rice is dried by the bran removal air. The bran removal air is discharged from the perforated wall cylinder 61 together with the dust attached to the crushed rice and the white rice,
The air is discharged to the outside of the machine by the air exhaust unit 77 through the air exhaust chamber 75 and the air exhaust tube 76.

The residence time of the stirring and polishing machine 58 is 5 to 10
Second, the moisture content of white rice is 0.3 to 0.5 relative to the moisture content of raw rice.
It will be a value increased by%. Due to the frictional action of the stirring and polishing machine 58, the hygroscopic portion of the surface of the polished rice is scraped off before the moisture is absorbed inside the polished rice. Therefore, the water adhering to the surface of the white rice is further reduced, and it is possible to prevent the generation of fine cracks occurring on the surface of the white rice, and the water absorption at the time of soaking and cooking is improved. In addition, the polished rice 68 is subjected to a polishing action in the polishing chamber 68 to be finished into a beautiful glossy rice, and the surface of the polished rice is smoothed, so that the taste of the cooked rice is significantly improved.
The polished rice is discharged from the discharge port 70 against the discharge lid 73, and is sent from the discharge gutter 82 to the next step through the grain elevator 83.

Next, the above-mentioned processing of white rice will be described with reference to FIGS.
Will be explained. FIG. 5 is a cross-sectional view of white rice before the rice washing process, in which a starch powder layer 90 has an adhesive powder layer 90 attached to the uneven surface. When this is washed and dehydrated by the washing and dehydrating machine 9,
As shown in FIG. 6, the aleurone layer 90 is completely removed. However, the surface of the white rice is uneven, so if you cook this white rice, you will end up with a bad texture. However, the white rice that was abraded by the agitating and abrading machine 58 is shown in FIG.
As shown in, the surface of the white rice is smoothed, and the taste is greatly improved.

The water used for washing rice in the washing and dewatering machine 9 is
The raw water tank 84 is supplied to the raw water tank 84 of the viable bacteria purification apparatus 41.
In the washing rice wastewater, chlorine or the like is added to sterilize the rice, and then the wastewater is sent to the flocculation tank 85 and a flocculant (for example, CaCl2) is added. Washing wastewater is from the flocculation tank 85 to the flocculation sedimentation layer 86
The coagulant is concentrated and settled at the bottom, and the BOD of the rice rinsing wastewater is about 10,000 PPM to about 2,000 ~.
Reduced to 3,000PPM. The rice rinsing wastewater with reduced BOD is sent to the activated sludge tank 87, where activated sludge bacteria are added and aeration is performed. Wastewater from washing rice is sent from the activated sludge tank 87 to the settling tank 88,
In 8, the organic matter is precipitated together with the sludge bacteria, and the purified water in the upper layer has a BOD of 20 P.PM or less and is discharged.

In this embodiment, the rice washing / dehydrating machine is a vertical type, but it may be a horizontal type as shown in FIG. 8 and its constitution and operation will be described below. An inner cylinder 96 is rotatably provided laterally in a cylindrical machine frame 91 having a supply gutter 92 at one end and a discharge gutter 93 at the other end via a pair of bearings 94 and 95. The one end opening of the inner cylinder 96 is a rice supply path 98 formed by a supply gutter 92 and an inclined supply chute 97 connected to the supply gutter 92.
And the other end opening communicates with the rice discharge passage 100 formed by the discharge gutter 93, and the rice supply passage 98 has a discharge port of a water pipe 99 provided with a flow rate adjusting means (not shown). No The end of the inner cylinder 96 is formed by the porous wall 101 to form the draining portion 102, and the other inner cylinders 9 are formed.
6. The inside of the drainage part 102, which forms the inside of the drainage part 103, is formed as a drainage chamber 105 by a partition wall 104.
A drain gutter 107 is arranged below the drain port 106 at the lower end.

Further, a screw 109 having resin-made screw blades 108 is horizontally provided over the entire length of the inner cylinder 96. That is, the screw shaft 112 is rotatably supported by the bearing 110 and the bush 111 at both ends of the machine frame 91,
A bearing pulley 113 is attached to the end of the screw shaft 112 on the side of the rice supply path 98. On the other hand, the passive pulley 114 is formed on the outer peripheral wall of the inner cylinder 96, and these passive pulleys 113, 114
And a pair of motor pulleys 116 and 117 pivotally attached to both shafts of the motor 115 by V belts 118 and 119. In the passive pulleys 113 and 114, the passive pulley 113 of the screw 109 has the inner cylinder 9 so that the screw 109 rotates faster than the inner cylinder 96.
6 has a smaller diameter than the passive pulley 114. Also,
The gap between the screw blade 108 and the inner cylinder 96 is 0.
It is about 3 mm and the porous wall 10 of the draining part 102
Needless to say, 1 is formed so that the rice grains are not exposed.

Incidentally, the drainage hole 10 is appropriately provided on the bottom of the machine frame 91.
2 should be drilled.

Next, a specific operation in the above embodiment will be described. When the motor 115 is started, the screw 109 and the inner cylinder 96 simultaneously start rotating in the same direction. The rotation speed is, for example, 1600 rpm for the inner cylinder 96 and 1720 rpm for the screw 109. Polished rice fed from a hopper or the like (not shown) flows down into the supply gutter 92, and water is supplied from a water pipe 99. The amount of water supplied is 1.5 times the amount of milled rice, for example, the flow rate of milled rice is 20 times per hour.
With 0 kilograms, water is 300 kilograms per hour.

When the operation of the apparatus is started under such conditions, the polished rice falling in the supply gutter 92 comes into contact with the rice while flowing down the supply chute 97, and goes to the dipping section 103 in the inner cylinder 96 as it is. Pour in. Since the inner cylinder 96 rotates at 1600 rpm, the milled rice and the water spread along the inner peripheral wall of the inner cylinder 96 due to the centrifugal force, and the state of the cross section becomes substantially annular. On the other hand, since the screw 109 is 1720 rotations per minute, the screw 109 transfers milled rice and water at 120 rotations per minute. Therefore, the polished rice soaked in water passes through the soaking section 103 in about 4 to 5 seconds, during which the bran pieces attached to the surface of the polished rice absorb water and soften.
Therefore, it is sufficient for the immersion section 103 to have enough time for the bran pieces to soften, and the passage time of the immersion section 103 is appropriately set by changing the rotation speed of the screw 109.

The milled rice and water that have passed through the immersion section 103 are
Next, water is blown off from the porous wall 101 while passing through the water draining section 102 in 1 to 2 seconds. In this way, the polished rice that has been completely drained of rice bran and the like, that is, the washed polished rice falls in the discharge gutter 93 and is discharged.
The polluted water mixed with the bran pieces is blown into the drainage chamber 105 and then discharged through the drain gutter 107.

[0031]

According to the rice washing apparatus of the present invention,
Moisture that is ubiquitous on the surface of white rice that is not removed by dehydration by a dehydrator is completely dried by a dryer and a stir-polishing machine to prevent cracks that occur on the surface of white rice due to the ubiquity of water, and during immersion. In addition, the water absorbency at the time of cooking rice is improved, and it is possible to finish non-washed rice that does not become sticky and sticky rice when cooking rice. Further, in the stirring and polishing machine, by the stirring flow action by the stirring trochanter,
Polished rice is rubbed into pieces and the surface of the polished rice is smooth-polished, and it is beautiful, and it can be made into non-washed rice that has a good taste during cooking.

Further, since the opening of the supply cylinder of the dryer is provided close to the perforated wall rotary cylinder, the dry air can surely dry the white rice, and the drying efficiency can be greatly improved.

[Brief description of drawings]

FIG. 1 is a flow chart of a rice washing processing apparatus embodying the present invention.

FIG. 2 is a partial side sectional view of a stirring and polishing machine.

FIG. 3 is a side sectional view of a rice washing dehydrator.

FIG. 4 is a front sectional view of a horizontal dryer.

FIG. 5 is an enlarged cross-sectional view of white rice.

FIG. 6 is an enlarged cross-sectional view of white rice.

FIG. 7 is an enlarged cross-sectional view of white rice.

FIG. 8 is a side sectional view of another rice washing and dehydrating machine.

[Explanation of symbols]

 1 Rice Washing Processing Equipment 2 Supply Hopper 3 Rotary Valve 4 Mixing Tank 5 Pump 6 Pump 7 Pump 8 Rice Washing Machine 9 Rice Washing Dewatering Machine 10 Supply Pipe 11 Frame 12 Motor 13 Pulley 14 Belt 15 Spindle 16 Pulley 17 Pulley 18 Belt 19 Rotating Shaft 20 Pulley 21 Tension Pulley 22 Connection Shaft 23 Stirring Body 24 Connection Body 25 Rice Washing Cylinder 26 Rice Washing Chamber 27 Spiral Blade 28 Perforated Wall Cylinder 29 Dewatering Chamber 30 Rotating Table 31 Discharge Port 32 Discharge Gutter 33 Nozzle 34 Water Storage Chamber 35 Passage 36 Water Supply Channel 37 Water Supply Pipe 38 Supply path 39 Exhaust port 40 Exhaust pipe 41 Viable bacteria purifying device 42 Exhaust pipe 43 Air shutter 44 Rotary valve 45 Horizontal dryer 46 Feed cylinder 47 Casing 48 Screw conveyor 49 Perforated wall rotary cylinder 50 Filter 51 Fan 52 Heater 53 Supply Cylinder 54 Opening 55 Exhaust Cylinder 56 Discharge Cylinder 57 Rotary Valve 58 Stirring and Polishing Machine 59 Supply Tank 60 Solenoid Valve 61 Perforated Wall Cylinder 62 Spindle 63 Spiral Rotor 64 Stirring Protrusion 65 Stirring Rotor 66 Ventilator 67 Jet Vent 68 Drying Chamber 69 Supply Port 60 Discharge port 71 Shutter 72 Resistor device 73 Resistive lid 74 Air inlet 75 Air exhaust chamber 76 Air exhaust tube 77 Air exhaust device 78 Motor 79 Pulley 80 Pulley 81 Belt 82 Discharge gutter 83 Grain lifter 84 Raw water tank 85 Coagulation tank 86 Coagulation sedimentation Tank 87 Activated sludge tank 88 Settling tank 89 Starch layer 90 Glue layer 91 Machine frame 92 Supply gutter 93 Discharge gutter 94 Bearing 95 Bearing 96 Inner cylinder 97 Supply chute 98 Feeding channel 99 Water pipe 100 Discharging channel 101 Perforated wall 102 Draining section 103 Immersion part 104 Partition wall 105 Drainage chamber 106 Drainage port 107 Drain gutter 1 8 screw blade 109 screw 110 bearing 111 bushing 112 screw shaft 113 driven pulley 114 driven pulley 115 motor 116 motor pulley 117 pulley 118 V belt 119 V belt 120 drainage holes

Claims (2)

[Claims] 1. A rice washing machine for washing white rice to remove bran, a dehydrator for removing water adhering to the surface of washed white rice, a dryer for drying dehydrated white rice, and a rotation in a perforated wall cylinder. An apparatus for washing rice, characterized in that it comprises a stirring rotator mounted on a freely provided main shaft and a stirring and polishing machine for polishing dried white rice into grains. 2. The rice washing machine according to claim 1, wherein the dryer has a multi-walled rotary cylinder rotatably provided in a casing, and an opening of a supply cylinder provided in the rotary cylinder is provided close to the rotary cylinder. Processing equipment.