JPH084751B2 - White rice humidifier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a humidifier for polished rice, and more particularly to a humidifier for polished rice whose temperature has been raised by rice polishing or a heating device.

[Conventional technology]

Conventionally, the white rice that has been milled by a rice milling machine generates heat during rice milling and loses its water content, causing a deterioration in the taste (hikio) and rubbing. It is placed in a tank and slowly humidified at a rate of about 0.2% per hour for 5 to 10 hours to prevent cracking of rice grains due to rapid water absorption, and finishes white rice with an appropriate water content. This has made the moisturizing process for the polished rice essential after the rice polishing, which is also indispensable for the producers to tend to supply the brown rice that has been prepared to be overdried.

[Problems to be solved by the invention]

By the way, in rice mills and the like in recent years, equipment having a large processing capacity is arranged consistently and operated efficiently, but as for the humidification step, as described above,
The current situation is that it requires time, interrupts the flow process of the entire factory, and requires a large-capacity storage tank.

Also, the moisture absorption rate of white rice varies depending on the part of the white rice grain,
Since it is difficult for the back part to absorb moisture and the abdomen easily absorbs moisture, if the amount of water for humidity adjustment is unevenly distributed to the part where there is white rice, the white rice grains will crack due to the difference in water supply speed.

In view of this point, the present invention is to provide a moistening device for polished rice, which is capable of moisturizing polished rice after polishing rice in the shortest possible time to humidify rice grains having an appropriate water content (about 15%). It is an issue.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a screw for stirring and transporting white rice immediately after the grain temperature is raised by the rice polishing machine or the heating device of the white rice in the process immediately after the rice heating machine or the heating device of the white rice. A conveyor cylinder provided with a conveyor is provided, and this conveyor cylinder is provided with a water addition unit that directly drops water on the polished rice at a plurality of positions in the conveying direction with an air blower that blows air into the conveyor cylinder. I took the technical means of communicating.

And, the conveyor cylinder, a supply unit at one end side,
It is effective to provide a discharge section at each of the other ends, provide an air shutoff valve at each of the supply section and the discharge section, and pressurize the inside of the conveyor cylinder by the blower.

[Work]

The temperature of white rice that has been raised due to rice polishing or the heated white rice is such that the water in the inner layer moves (diverges) toward the surface layer, and the temperature of the rice grains in such a state drops to the ambient temperature. Safe to moisturize polished rice Even if water (about 1% of rice grain weight) is added at a humidification rate that is about 5 times the humidification rate, the rate of water absorption inside the rice grain will be partial if it is uniformly moisturized Since there is no bias in rice, there is almost no rice grain cracking.

Therefore, by adding water to the polished white rice whose temperature has risen or heated white rice while stirring and transporting it, and removing excess moisture by ventilation while the rice temperature is maintained, It gives water in a short time without cracking. Further, when a high humidification speed is required, it is possible to heat or heat under pressure to accelerate and humidify.

Example of Invention

 A preferred embodiment of the present invention will be described with reference to the drawings.

A milling trochanter 3 is rotatably placed horizontally in a bran removal mill 2 made of porous walls, and a cylindrical shape is provided immediately after the rice milling machine 1 including a supply hopper 4, a discharge port 5, a bran hopper 6, and the like. A conveyor case 7 is erected, and a screw conveyor 8 is rotatably provided in the conveyor case 7. The conveyor shaft 9 of the screw conveyor 8 protrudes from the upper end of the conveyor case 7, and the pulley 10 is mounted on the conveyor case 7.
An electric motor control wheel 12 of an electric motor 11 provided at the upper end of the control wheel 10 and the control wheel 10 are interlocked by a V-belt or the like. Further, a discharge port 13 is opened at the upper end of the conveyor case 7, a supply port 14 is opened at the lower end thereof, and a supply hopper 15 is provided, and the supply hopper 15 is equipped with a temperature sensor 16 for measuring the temperature of white rice.

The conveyor case 7 is provided with water adding portions 17, 17 at a plurality of positions at intervals. That is, the other end of the water pipe 18 having one end connected to an appropriate water source (such as a water tank) is exposed to the inside of the conveyor case 7 through the water amount control valve 73, and the water is directly dripped onto the white rice pumped by the screw conveyor 8. To do. The water pipe 18 may be provided with a spout at the end of the water pipe 18 for discharging water in a shower shape, or very fine water drops may be dropped. The amount of water to be added is adjusted by each water amount control valve 73 according to the flow rate and the water content of the white rice discharged from the rice polishing machine 1. Also, if the flow rate of white rice and the water content are determined,
The amount added depends on the temperature of the white rice. That is, when the rice temperature rise by the rice polishing machine 1 is small, it is necessary to reduce the amount of added water to prevent cracking of rice grains, and the control of the total amount of water is performed by the flow rate control attached to the temperature sensor 16 and the water pipe 18. The valve 20 is formed so as to be automatically operated by electrically connecting it to a control unit (CPU or the like) built in the operation panel 19.

A chute pipe 21 is provided at the discharge port 13 of the conveyor case 7, and the chute pipe 21 directly discharges the white rice discharged from the discharge port 13 to the next process or passes through a plurality of white rice humidifiers 22. There is also.

Next, the blowing and pressurizing device will be described. A large number of ventilation holes 24 are provided on the conveyor shaft 9 of the screw conveyor 8, and the ventilation ports 24 are exhaust pipes connected to the shaft ends of the conveyor shaft 9.
It is connected to the intake side of the blower 26 via 25, and branch pipes 28, 29 and dampers 30, 31, 32 are provided in the middle thereof. The branch pipes 28, 29 and the dampers 30, 31, 32 may be on the discharge side of the blower 26. The discharge side of the blower 26 is connected to an air supply pipe 27 opened in the conveyor case 7. Also, reference numeral 33
Is an air cutoff valve provided in the supply hopper 15 part, and 34 is an outlet
An air shutoff valve provided in 13 parts, and the same 35 is a pressure gauge for measuring the pressure in the conveyor case 7.

The specific operation of this embodiment will be described below.

The brown rice grains thrown into the supply hopper 4 of the rice mill 1 are stripped of the bran layer at the surface layer of the brown rice while passing through the gap between the bran removal white barrel 2 and the white trochanter 3 to be milled. It The milled polished rice is discharged from the discharge port 5 and supplied to the supply hopper 15 below the conveyor case 7. Supply hopper 15
The temperature of the white rice grains inside is measured by the temperature sensor 16, and this measured value (usually 15 ℃ to 20 ℃ due to rice polishing action)
There is a rise in rice temperature. ) Is A / D converted and taken into the control unit of the operation panel 19. Supply port 14 to conveyor case 7
The white rice grains that have flowed in are fed by the screw conveyor 8, but are subjected to water addition by the water addition unit 17 provided at the bottom of the conveyor case 7.

That is, water in a water tank or the like is dropped directly from the water addition section 17 to the white rice grains through the water pipe 18 and the water amount control valve 73. The addition amount per unit time is set to a fixed amount by the flow control valve 20 connected to the control unit, for example, the amount of water that raises the water content by 0.5% is set, and the rice temperature is fixed by being corrected by the measurement value of the temperature sensor 16. When it is lower than the range, the water absorption is reduced to prevent cracking of rice grains. In this way, the white rice grains to which water has been added are immediately flown and stirred by the screw conveyor 8 while being pumped, while water is evenly attached to the white rice grains and safely absorbed, and the mutual pressure of the rice grains acts. Then so-called humidified rice is conducted. This action is repeated a plurality of times during flowing and stirring, and the humidity control proceeds to a desired water content. Further, since the flow of water and stirring are continued, the rice temperature does not drop sharply, and when the rice mill is contacted, the temperature at the time of discharging from the rice mill 1 is maintained. Therefore, the water adhering to the surface of the white rice grain does not penetrate into the inside of the whole surface of the white rice grain at a high humidification rate to cause cracking of the rice grain.

On the other hand, by driving the blower 26, the air flowing in from the branch pipe 29 is sucked into the conveyor shaft 9 from the ventilation port 24 through the air supply pipe 27 and the conveyor case 7 (damper 30 ... Closed, damper 31 ... Open, damper 32). … Open). Next, when the dampers 30 and 31 are closed and the damper 32 is opened in the high pressure state, the inside of the conveyor case 7 is in the high pressure state. Then, when the predetermined pressure is reached, the damper 30 is opened by an arbitrary amount,
A circulating air passage can be formed and the inside of the conveyor case 7 can be maintained at a constant high pressure.

Under such pressurization, the white rice grains in the conveyor case 7 are ground by the friction between the grains while being fed while being fluidized and stirred by the screw conveyor 8, and are added by the plurality of water adding portions 17 respectively. The generated water is evenly permeated into the inner layer from the surface of the rice grains that flows and is stirred. In this way, the white rice grains that have been humidified and subjected to the polishing action become glossy white rice grains and are conveyed from the upper end of the conveyor case 7 to the subsequent step.

In the present embodiment, the rice milling machine 1 is temporarily set to one, but may be seated together, and may be a grinding type, a friction type, a horizontal axis type or a vertical axis type. Also, conveyor case 7
It is also possible to promote the stirring action by providing a projection that enhances the stirring action on the inner wall of the above, and by providing a stirring piece on the screw conveyor 8.

Next, another embodiment of the present invention will be described with reference to FIG. The white rice heating device 36 has the following configuration. That is, the perforated wall rotary cylinder 37 is horizontally provided inside the machine frame 38, the one side of the perforated wall rotary cylinder 37 is provided with a white rice supply hopper 40 having a flow rate adjusting shutter 39, and the other side is provided with a white rice discharge port 41. A grain thermometer 23 is provided at the white rice discharge port 41. Then, a part of the lower part of the machine frame 38 is opened, a blower duct 42 is installed, and a blower 43 and a combustion furnace 44 are provided in the blower duct 42 to form the hot air generator 45,
An upper wall 47 having an air outlet 46 is provided on the upper surface of the machine frame 38 to form a hot air passage 48. Immediately after the heating device 36, a cylindrical conveyor case 49 is horizontally installed, and the discharge port 38 and the input port 70 are connected.
A screw conveyor 50 is rotatably provided in the conveyor case 49. The conveyor shaft of the screw conveyor 50 protrudes from one end of the conveyor case 49 and has a pulley 51 attached thereto, and a pulley 53 of an electric motor 52 provided above the conveyor case 49.
And the adjusting wheel 51 are interlocked by a V-belt or the like. Further, an outlet 55 provided with an air shutoff valve 54 is provided at the lower part of the other end of the conveyor case 49. The conveyor shaft 56 of the screw conveyor 50 is formed in a hollow shape and has a large number of through holes 57 in the peripheral wall.
Has been drilled. In addition, one end of the hollow conveyor shaft 56 is closed, the other end of the conveyor shaft 56 is open, and it is slidably connected to the blower 58. The suction port 59 of the blower 58 is connected to a discharge pipe 62 of a wet air generator 61 including an ultrasonic vibration element 60. Further, an exhaust port 63 opened in a part of the conveyor case 49 and a suction side of the wet air generating device 61 are connected by a duct 64. The duct 64 has branch pipes 65, 6 for adjusting the air volume.
6 is provided, a damper 67 is provided on the branch pipe 65, a damper 68 is provided on the branch pipe 66, and a damper 69 is provided between the branch pipes 65 and 66. Reference numeral 71 is an air cutoff valve provided in the inlet 70, and reference numeral 72 is the same structure as the water addition unit 17 described in the above embodiment.

The specific operation of this embodiment will be described below. The white rice grains charged into the supply hopper 40 in the heating device 36 are heated by the hot air generated from the hot air generator 45 while flowing through the porous wall rotary cylinder 37 from the supply side to the discharge side,
It is discharged from the discharge port 41 and then supplied to the charging port 70 of the conveyor case 49. White rice is a grain thermometer installed in the outlet 41
The temperature is measured by 23, and the measured value is communicated to the control unit and compared with an arbitrary set value to automatically adjust the hot air temperature of the hot air generator 45. The white rice grains that have flowed into the conveyor case 49 from the charging port 70 are each humidified by a plurality of moisture adding sections 72 in the path of the conveyor case 49, and are flowed / stirred by the screw conveyor 50, and a wet air generator 61 is also provided. The uniform moisturizing action is supplementarily received by the moist air generated at. Moreover, the rice temperature does not drop sharply due to the heat generated by the flow and stirring, and the rice temperature is maintained at almost the same temperature as when it was discharged from the heating device 36. Therefore, the water that has been dropped onto the surface of the white rice grains and has adhered penetrates inside at a high speed,
It is humidified without cracking rice grains. The white rice grains reaching the other end of the conveyor case 49 are discharged from the discharge port 55 and conveyed to the next step.

When the inside of the conveyor case 49 is in a pressurized state,
Open the damper 68 installed on the branch pipe 66, and
The fan is closed and blown, and when the pressure reaches the specified level, the damper
Open 69 an arbitrary amount to maintain a constant high pressure. In this embodiment, the air is blown from the screw shaft. However, the air may be sucked from the screw shaft in some cases.

〔The invention's effect〕

As described above, the present invention has the following remarkable effects. That is, since a water adding device is provided at a plurality of positions in the conveying direction of the conveyor cylinder that immediately stirs and transports the white rice whose grain temperature has been increased by the rice polishing machine or the heating device, and excess water is removed by ventilation, With a simple structure, it is possible to add water in an amount that does not cause cracks in the white rice during the process of stirring and transporting white rice, and add water in an amount that does not cause cracks again when the water moves from the surface of the white rice to the inside. Efficient humidity control can be performed in the entire agitation / transportation path. In addition, water is added to polished rice of which the temperature has risen during polishing or optionally heated white rice and ventilation is performed, and while transporting the polished rice while flowing and stirring, the moisture is evenly added to the surface of the rice grains and sufficient By removing excess moisture by ventilation, polishing the rice, and maintaining the rice temperature by stirring, the rice grain temperature is much safer than that of normal rice grains (rice cracking does not occur. ) Allows water to be added at high speed.

Further, by carrying out pressure humidification, it becomes possible to add desired water at a speed 10 to 20 times faster than usual as a result.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing the whole of one embodiment of the present invention, and FIG. 2 is a partially cutaway side view showing the whole of another embodiment. 1 ... rice polishing machine, 2 ... bran removal white barrel, 3 ... whitening trochanter, 4
…… Supply hopper, 5 …… Discharge port, 6 …… Bran hopper,
7 ... Conveyor case, 8 ... Screw conveyor, 9
…… Conveyor axis, 10 …… control wheel, 11 …… motor, 12 …… motor control, 13 …… discharge port, 14 …… supply port, 15 …… supply hopper, 16 …… temperature sensor, 17 …… Water addition section, 18 ...
… Water pipe, 19 …… Operation panel, 20 …… Flow control valve, 21 …… Shoot pipe, 22 …… White rice humidifier, 23 …… Grain thermometer, 24…
… Ventilation port, 25 …… Exhaust pipe, 26 …… Blower, 27 …… Air pipe, 28,29 …… Branch pipe, 30 to 32 …… Damper, 33,34 ……
Air shutoff valve, 35 …… pressure gauge, 36 …… warming device, 37 …… multi-walled rotary cylinder, 38 …… machine frame, 39 …… flow rate control shutter,
40 …… Supply hopper, 41 …… White rice outlet, 42 …… Blower duct, 43 …… Blower, 44 …… Burning furnace, 45 …… Hot air generator, 46 …… Blower, 47 …… Upper wall, 48 ...... Hot air path, 49 ……
Conveyor case, 50 …… Screw conveyor, 51 …… Control wheel, 52 …… Electric motor, 53 …… Control wheel, 54 …… Air shutoff valve, 55
…… Discharge port, 56 …… Conveyor shaft, 57 …… Hole, 58 …… Blower, 59 …… Suction port, 60 …… Ultrasonic vibration element, 61 …… Wet air generator, 62 …… Discharge pipe, 63 ...... Exhaust port, 64 ...... Duct, 65,66 …… Branch pipe, 67 to 69 …… Damper, 70 …… Inlet, 71 …… Air shutoff valve, 72 …… Water addition part, 73 …… Water volume adjustment valve.

Claims (2)

[Claims] 1. A conveyor cylinder provided with a screw conveyor for stirring and transporting the white rice immediately after the shell temperature is raised by the rice polishing machine or the rice heating device, in the process immediately after the rice polishing machine or the rice heating device. Is provided, this conveyor cylinder,
A white rice humidifier characterized in that a water addition section for directly adding water to white rice is provided at a plurality of positions in the conveying direction at intervals, and a blower for ventilating the inside of the conveyor cylinder is connected. 2. The conveyor cylinder body is provided with a supply unit at one end side and a discharge unit at the multi-end side, and an air shut-off means is provided at each of the supply unit and the discharge unit. The white rice humidifier according to claim 1, wherein the rice is humidified.