JPH0813341B2 - How to dry undried brown rice - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for drying undried brown rice.

[Problems to be Solved by Prior Art and Invention]

Once the paddy rice has been dried by the dryer and the hulling work is carried out after a certain period of time, if the moisture value of the finished brown rice collected in this hulling work is abnormally high, it becomes difficult and must be interrupted. It will not happen.

By the way, the grain that has already been browned cannot be delivered as it is because of its high water content, and it is troublesome because it has to be dried by a method such as sun drying. In addition, discarding wastes wastes productivity.

[Means for solving the problem]

The present invention has taken the following technical measures in an attempt to solve the above drawbacks. That is, brown rice that has been detreated as undried, or brown rice that has regained moisture due to outside air conditions, etc., is mixed with dried paddy rice that has a predetermined moisture value and dried while circulating and drying. Configure the method.

[Operation and effect of the invention]

The paddy rice, which is appropriately put in a dryer, is dried until a predetermined moisture value is reached. Next, it is used for hulling and sorting with a hull sorting machine, but the temperature of the hulled rice rises immediately after drying and is not suitable for hulling. To start.

By the way, in the above-mentioned series of paddy rice preparing steps, if a cooling time is provided at the time of shifting from the drying step to the removing / sorting step, a so-called moisture return phenomenon occurs depending on the outside air conditions.
That is, paddy rice, which should have been finished to 15%, causes a moisture absorption phenomenon to reach a state of equilibrium when the outside air humidity is high.
Return to about%.

When this dehumidified paddy rice is detreated, it is not suitable as donation rice, and therefore, when the measured water content appears higher than the planned moisture value, it means that the water content is already rehydrated. The unpolished / selected brown rice is returned to the dryer 1 from the loading hopper 2 and mixed with undischarged paddy rice to be dried while circulating in the machine.

Therefore, the above-mentioned drawbacks can be solved. Especially, when the brown rice that has been pasted is mixed in the paddy rice and is slowly dried, the outer skin part of the paddy rice functions as a cushioning material, and the feeding valves 9 and 9 and the vertical transfer spirals 4 and 10 Damage to the circulatory system of the grain machine 3 and the like can be reduced.

〔Example〕

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

Reference numeral 1 is a circulation type dryer, which allows a certain amount of paddy rice to be stored in a storage tank 5 inside a machine frame from a squeeze hopper 2 through a grain elevator 3 and an upper transfer spiral 4 while flowing down drying passages 6 and 6. It is configured such that hot air generated by the burner 7 or the suction fan 8 is blown to dry it. 9 and 9 are feeding valves, and 10 is a lower transfer spiral, which collects dried paddy rice and the above-mentioned grain elevator 3 and the above-mentioned transfer spiral 4
It is configured to be reduced and tempered through.

A moisture meter 11 is configured to receive sample grains from the middle part of the grain fried machine 3 to measure moisture at predetermined intervals and output the signal to the control panel 12. The control panel 12 is provided with switches for loading, drying, discharging, stopping, etc. on the panel surface,
It has a swelling amount setting switch, a finishing moisture setting switch, etc.
The built-in microcomputer stores a control program necessary for drying control, and while collecting the selection information of these switches, the measurement information of the moisture meter 11 and other information such as an abnormality detection sensor arranged in each unit, the burner 7, the hot air temperature setting signal, the drive motor control signal for each part, etc. are output.

A discharge chute 14 is connected to the transfer start end side of the transfer gutter 13 having the above-mentioned upper transfer spiral 4, and the lower part of the transfer gutter 13 is opened by an opening / closing valve (not shown) to discharge the dried paddy rice outside the machine. It is designed to be possible.

Reference numeral 15 is a hulling / sorting machine, which is provided with a stripping section 17 having a pair of stripping rolls 16 and 16, a box-shaped wind sorting section 18 and a sorting cylinder 19 for forming a large number of jar holes on its inner peripheral surface for rotation The mixed rice, which is composed of a sorting unit 20 and the like, receives the dried unhulled rice from the supply funnel 21 and is detreated, and the rice husk and immature rice are removed, is separated into unhulled rice and brown rice in the rotary sorting unit 20.

Reference numeral 22 is a mixed rice thrower for supplying the mixed rice to the rotary sorting section 20, and 23 is a finished rice thrower for collecting the finished brown rice from the rotary sorting section 20 outside the machine.

24 is a weighing bagging machine provided at the outlet of this finishing rice thrower 23 except for the receiving hopper 25, which comprises a rotary sieving net 26 for separating and removing small rice during the internal transfer process, a rotary fried helix 27, etc. . Reference numeral 28 denotes a weighing platform, which is configured to output a weighing signal to a built-in control unit (not shown) to close the shutter 30 below the hopper 29 when the brown rice contained in the bag reaches a predetermined weight.

 The operation of the above example will be described.

Set the finishing moisture value in advance to 15%, and add the paddy rice to be dried from the hopper 2 into which the rice is to be dried. When the dryer is started, the paddy rice is circulated in the machine, and hot-air drying and conditioning are repeated to finish the above-mentioned predetermined moisture value.

Immediately after the burner 7 is stopped, the temperature of the unhulled rice is high and there is a risk of degrading the quality of the unhulled rice, so a cooling time of several hours is set. After an appropriate time has elapsed, the discharge chute 14 is connected to the feed funnel 21 of the paddy hull sorter 15, and the open / close valve of the transfer gutter 13 is opened to discharge the paddy rice.

On the side of the paddy sorting machine 15, the paddy rice is received and the sorting / sorting process is performed. The brown rice taken out from the finished rice thrower 23 is supplied to the weighing bagging machine 24 as it is, and only the sized brown rice from which the small rice has been removed is bagged, for example, every 30 kg.

By the way, in the above-mentioned series of paddy rice preparing steps, if a cooling time is provided at the time of shifting from the drying step to the removing / sorting step, a so-called moisture return phenomenon occurs depending on the outside air conditions.
That is, paddy rice, which should have been finished to 15%, causes a moisture absorption phenomenon to reach a state of equilibrium when the outside air humidity is high.
Return to about%.

When the dehumidified paddy rice is detreated, it is not suitable as donated rice, and therefore the following treatment is taken. That is, the moisture value of the brown rice taken out from the weighing bagging machine 24, a portable moisture meter (not shown) prepared appropriately, or the moisture meter 11 when an external measuring function is added to the moisture meter 11. Use to measure.

When this measured value is higher than the planned moisture value, it means that the moisture has been rehydrated. The brown rice already packed in the bag is returned from the loading hopper 2 into the dryer 1 and the undischarged paddy rice is discharged. It mixes and circulates in the machine while drying. At this time, when the remaining unhulled rice in the dryer 1 is additionally dried to have a predetermined moisture value or slightly overdried, the burner 7 is not necessarily started, but the undried brown rice is directly added without additional drying. At this time, it is advisable to circulate while generating low-temperature burner 7 hot air as necessary.

When the brown rice that has been put up later is mixed in the paddy rice and slowly dried, the outer skin part of the paddy rice functions as a cushioning material, and the feeding valve 9,9, the vertical transfer spiral 4,10, and the grain elevator 3 The damage caused by can be reduced.

In the above example, the dryer 1 was used to mix brown rice and dry paddy rice to reduce the moisture content of the undried brown rice. However, when the moisture return state is extremely gentle, the sized brown rice is stored separately. When supplying new brown rice that has been dried and de-sorted with an appropriate moisture value to the weighing bagging machine 24, the undried brown rice is gradually added to eliminate moisture reversion by mixing with brown rice with an appropriate moisture value. Good.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall side sectional view and FIG. 2 is a perspective view of a circulation dryer. In the figure, 1 is a circulation dryer, 2 is a feed hopper, 3 is a grain elevator, 4 is an upper transfer spiral, 5 is a storage tank, 7 is a burner,
8 is a suction fan, 9 and 9 are feeding valves, 10 is a lower transfer spiral, 11 is a moisture meter, 12 is a control panel, 13 is a transfer gutter, 14 is a discharge chute, 15 is a hull sorter, and 16 and 16 are desorption. Roll, 17 is departing section, 18 is wind selecting section, 19 is a sorting cylinder, 20 is a rotary sorting section, 21 is a feeding funnel, 22 is a mixed rice thrower, 23 is a finished rice thrower, 24 is a weighing bagging machine, 28 is a It is a weighing platform.

Claims (1)

[Claims] 1. A undried brown rice that has been undried and detreated, or brown rice that has regained moisture due to outside air conditions, etc., is mixed with dried paddy rice that has been dried to a predetermined moisture value and circulated and dried. How to dry brown rice.