JPH0316652A - Treatment of harvested rice - Google Patents

Abstract

PURPOSE:To solve problems, such as the yield of pestling, rice hulling rate and surface rubbing, and to maintain an adequate moisture so as to obtain the rice of a good taste by subjecting the harvested rice to an intermediate drying at the moisture between 22 to 17%, then to a finish drying just before the rice hulling. CONSTITUTION:The harvested rice is dried gently in the range of 22 to 17% moisture in intermediate drying stages 10, 11 but even if the drying is by fire power, the temp. rising speed of the hull is low and since the rice is maintained at the high moisture, the overdrying does not rise. The uniformization of the moisture is attained and the finish drying 14 of the ensuing stage is facilitated if the dehumidification drying is adopted for the intermediate drying. The harvested rice which is subjected to this intermediate dying is then subjected to the finish drying just prior to the rice hulling stage 6. The moisture conditions of the rice just prior to the rice hulling are exactly adjusted in this way, by which the yield of the pestling is improved, the rice hulling rate is improved, the surface rubbing is decreased and the taste is maintained. In addition, the dealing with all kinds of treatment forms is possible by the combination of the dehumidification drying and fire power drying.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for processing harvested rice by adjusting the moisture content of the harvested rice. (Prior Art) First, general matters regarding the processing of harvested rice will be explained in order to facilitate understanding of the present invention. The quality and processing (storage, hulling, etc.) of harvested rice are greatly influenced by the moisture content (wt%) of harvested rice. For example, in terms of quality, the higher the moisture content, the better the taste. On the other hand, if the moisture content is high, mold will form during storage, and the dehulling rate (husk removal rate) during hulling will decrease. For these reasons, the Ministry of Agriculture, Forestry and Fisheries recommends that from the perspective of taste, the moisture content at the time of hulling should be kept at 16% or less, and at the time of storage, it should be kept at 16% without ventilation.
It is stipulated that 7% can be stored for 35 days. In other words, there are certain conditions between the moisture content in storage and the number of days it is stored to prevent harvested rice from getting moldy. Next, if a grain of harvested rice has parts with high moisture content and parts with low moisture content, the rice grains may crack and sometimes become powder, reducing the milling yield. At the time of hulling, the husks are removed from the paddy, so it is better to have a suitable amount of moisture and hair remaining on the paddy. When the moisture content is high, the skin of brown rice is easily damaged by the rubbing during hulling (called skin abrasion), and if there is little stubble on the rice, the dehulling rate decreases. Next, there are two types of drying methods: thermal drying and dehumidifying drying, which differ in their drying principles. First, the principle of thermal drying is to use hot air to raise the temperature of harvested rice and evaporate the moisture to dry it, which has the advantage of being able to dry in a short time. On the other hand, the principle of dehumidifying and drying is to absorb and remove moisture using the latent heat of air close to the operating temperature, in other words, to generate low-humidity air and blow this air over the harvested rice. It absorbs and removes moisture, and the time required to remove moisture is longer than that of thermal drying. The moisture content of harvested rice varies depending on the time of harvest, the weather, and variations in flowering and ripening within a single rice plant. The Ministry of Agriculture, Forestry and Fisheries has set the moisture content for harvested rice at 24%.

Now, as a conventional method for processing harvested rice, there is a method shown in Figure 9. After receiving the harvested rice that has been harvested and threshed in the receiving process 1, the harvested rice is dried in a thermal drying process 2 to reduce the moisture content to 24%. Dry to a moisture content of 17% as specified by the Ministry.
Next, this 17% dried harvested rice is stored in the primary storage tank 3. The harvested rice thus primarily stored is then finished and dried in a finishing fire drying step 4 to a specified moisture content of 16% or less, and stored in a silo 5. Then, depending on the demand, silo 5 also discharged the required amount while carrying out the hulling process 6 and shipping. In the processing method shown in FIG. 1O, the harvested rice received in the receiving process 1 is received in a receiving storage tank 7 which is naturally ventilated. Therefore, the moisture content of the harvested rice in the receiving storage tank 7 is 24%.
It is. Next, the harvested rice is discharged from the receiving storage tank 7, and after drying from 24% moisture content to 16% or less in a finishing fire drying process 8, the rice is hulled in a hulling process 6 and shipped. The processing method shown in FIG.
Harvested rice with a moisture content of 24% received at
The rice was hulled and shipped. (Problems to be Solved by the Invention) Among the conventional processing methods described above, the one shown in FIG. 9 has the following problems. First, in the thermal drying process 2, the moisture content is reduced from 24% to 17% all at once, so some of the harvested rice becomes overdried, causing cracking, which reduces the milling yield. There is. In addition, in the thermal drying step 2, the rice is heated and stirred while drying, so there is a problem that the grains of the rice are removed and the dehulling rate by hulling is reduced. Next, in the finish drying step 4, the rice is finished dried to a moisture content of 16% or less, and then stored in the silo 5. However, due to the principle of heat drying, the amount of water evaporation varies depending on the temperature distribution of the paddy.
The moisture content of paddy is not always constant. Therefore, between the paddy stored in the silo 5, moisture transfers from the paddy containing a lot of moisture to the paddy with a low moisture, maintaining an equilibrium state (hereinafter referred to as moisture transfer), and ensuring that the moisture of the harvested rice in the silo 5 is maintained. Therefore, if the moisture content is higher than 16%, mold and fermentation will occur, resulting in a significant decrease in quality, and the brown rice will become soft. There is a problem in that the skin is rubbed during hulling and the rice does not turn into normal brown rice, and when the moisture content is less than 16%, the taste is affected.

Next, according to the processing method shown in FIGS. 10 and 11,
In the finishing fire drying step 8.9, the moisture content is reduced from 24% to 16% at once, which causes problems such as a decrease in the milling yield due to shell cracking and a decrease in dehulling rate due to the sludge of the chaff. The cause of these problems is that drying is done only by fire-power drying, but because the harvested rice that has been harvested and threshed must be dried within the same day, it is necessary to use fire-power, which has a faster drying speed. The reality is that a drying method has no choice but to be adopted.

The present invention provides a method for processing harvested rice that retains an appropriate amount of moisture and has good taste by using dehumidifying drying or a combination of dehumidifying drying and thermal drying to solve problems such as polishing yield, deblubbling rate, and peeling. This is what I am trying to do.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a method for processing harvested rice in which the harvested rice is dried and then hulled, and the moisture content of the harvested rice is between 22% and 17%. After the rice is partially dried, the partially dried harvested rice is finished and dried to a predetermined moisture level before the hulling process. (Function) With this configuration, the harvested rice is slowly dried with a moisture content in the range of 22% to 17% during intermediate drying, and even if drying is done by fire, the rate of temperature rise of the paddy is slowed down. , and maintains a high level of moisture, eliminating overdrying and preventing cracking of the hull and shedding of the paddy. Also, by dehumidifying the intermediate drying, the moisture content can be made uniform, making the final drying in the next step easier.

Next, this intermediately dried harvested rice is finished and dried before being hulled. As a result, the moisture conditions of the harvested rice immediately before hulling are controlled accurately, and there is no drop in dehulling rate or deterioration in taste. (Example) An example of the present invention will be described in detail below. First of all,
The basis for setting the moisture content to 22% to 17% in intermediate drying is as follows.

(The planned moisture content of harvested rice is set at 24%, but the moisture content of harvested rice varies depending on the harvest time, weather, and degree of flowering maturity.

For example, even if rice is harvested on the same day, the flowering maturity will vary depending on the field exposure, fertilizer, etc., and the flowering maturity will also vary even within a single grain of rice. different. Therefore, if the paddy is uniformly dried to a moisture content of 17%, there will naturally be some paddy with extremely low moisture content (overdrying), and there will also be paddy that suffers from cracking and poor taste. Therefore, at the early stage of harvest (mid-drying),
It was made to have a specified width for drying. In addition, in the past, the moisture content varied depending on the weather and soil conditions, so the moisture content was separated when receiving the cargo.
By allowing a specified width for drying in the early stages of harvest, there is no need to separate the moisture from the cargo, which eliminates cracking and loss of flavor, and simplifies the work. [ii) Harvested rice is generally dried on the same day to prevent mold growth and deterioration in taste during storage. Therefore, the dryer's capacity must match this. In the case of fire-powered drying, the hourly drying rate (drying rate per hour) is 0.6%/hour to 0.8%/hour, which is 20 hours a day (24 hours a day) according to the Ministry of Agriculture, Forestry and Fisheries standard. However, if you convert the amount of water by 1 hour per day (with a 4-hour allowance),
It is possible to dry 2% to 16%. Therefore, in the case of thermal drying, the planned moisture content is 12% compared to 24%.
It has the ability to dry up to 8% of harvested rice. This is the basis for conventional drying using only thermal drying. However, the inventor conducted experiments focusing on the superiority of dehumidification and drying for drying harvested rice. The advantage of dehumidifying drying is that it uses latent heat to remove moisture from harvested rice using temperature-controlled air that does not dry the harvested rice below a specified moisture content, so there is less evaporation of moisture from paddy with low moisture content. , a large amount of moisture evaporates from rice with a high moisture content (this phenomenon is called moisture equilibrium). On the other hand, thermal drying involves heating and evaporating paddy by raising its temperature, so both paddy with low moisture content and paddy with high moisture content are uniformly heated. Therefore, paddy with low moisture content becomes overdried. In dehumidifying drying, there is no such overdrying, and the moisture content of paddy after dehumidifying drying is
It is averaged. According to experiments on dehumidification and drying, the hourly drying loss rate is 0.1
It was found that 5%/hour to 0.3%/hour is optimal. In other words, this drying rate per hour is the result of an experiment to find the drying rate corresponding to the amount of air that contributes to drying the harvested rice when dehumidified air is introduced into the stored harvested rice. ．． The air that simply passes through without contributing to the drying of the harvested rice causes loss in the dehumidifying dryer, and the
．． A value of 15%/hour to 0.3%/hour can be said to be the most efficient value for dehumidification and drying. When calculated using this hourly drying loss rate of dehumidifying and drying, the drying loss per day of dehumidifying and drying is O. l5 x 20 days = 3%, 0.3
x20 days = 6%, and for the planned moisture of 24%, 2
It will be 1% to 18%. Therefore, considering the upper limit of 21%, I decided to take a 1% margin (margin for finish drying) and set it to 22%.
In addition, the lower limit of 17% is the standard 1 for preventing overdrying and finishing drying when the moisture content of harvested rice varies and it is stored with ventilation in primary storage.
This was determined based on an expected moisture content of 6%. This makes it possible to use dehumidifying drying instead of drying that was previously only possible using fire-powered drying. In this way, by controlling the moisture content to 22% to 17% during intermediate drying, there is no need to separate the moisture at the time of receiving the goods, and cracking of the shell and deterioration of flavor due to incorrect moisture separation can be prevented. In addition, by using dehumidifying drying, cracking of the shell and deterioration of flavor can be more reliably prevented. Even when thermal drying is used for intermediate drying, the hourly drying loss rate is 0.1 to 0.3%/hour { (24-22
) /20 days = 0.1%, (24-18)
/20 days = 0.3% The temperature increase rate of the rice is slowed down, thereby preventing shell cracking and deterioration of flavor. Next, in the final drying just before hulling, the drying loss rate per day was 22%-16
Since % = 6% and 18% - 16% = 2%, the hourly drying loss rate is 0.1 to 0.3%, and the final drying can be performed under almost the same conditions as the intermediate drying. Next, we will explain the processing method for harvested rice that is directly used to implement this method. In Figure 1, the harvested rice that has been harvested and threshed is received in receiving process 1 without separating the moisture. And an intermediate drying process l by dehumidifying drying.
Dry at O until the moisture content is in the range of 22% to 17%. In this intermediate drying step 10 by dehumidifying and drying, the paddy is dehumidified using the latent heat held by the air whose humidity and temperature are controlled so that the moisture content does not fall below a specified level. The characteristics of dehumidification using latent heat are that the air temperature is close to room temperature, so the rice grains are not heated, and because the rice is not stirred, there is little evaporation of water from the rice grains with low moisture content, and there is less evaporation of water from the rice grains with high moisture content. The amount of moisture evaporates increases, and drying is performed while maintaining an equilibrium state in the atmosphere, similar to so-called natural drying.
It is dried evenly without any deterioration in flavor due to cracking, falling off, or overdrying. The harvested rice that has been intermediately dried in this way is then transferred to the primary storage tank 11.
It is stored in Then, if necessary, the air is ventilated into the storage tank 11 from the ventilation fan l3 and stored. Even in this ventilation storage,
The harvested rice in the primary storage tank l1 has a moisture content of 22% to 17%, which is sufficient for the drying loss rate due to ventilation drying, so it is not overdried. There is no loss of taste. Next, primary storage tank 1
The harvested rice stored in 1 is discharged according to the required amount 2, and is dried to a predetermined moisture content in a final drying step 12 by dehumidification and drying.

The standard moisture content at this time is 16% or less, so it is best to use 6% moisture for the best taste. This adjustment to 16% moisture is achieved by dehumidifying and drying in the intermediate drying step 10, so for example, the moisture content in the primary storage tank 11 is uniformly 22%.
Since there is no variation in its moisture content, it is dried to an exact 16% moisture content. Since dehumidifying drying is also used in this finishing drying step 12, the temperature of the paddy is at room temperature, and there is no deterioration in flavor due to cracking of the shell, falling of sludge, or overdrying. Then, in the hulling process 6, hulling is carried out. In this hulling process 6, the rice satisfies all conditions such as moisture, temperature, and removal of sludge, and brown rice with good taste is obtained without reducing the dehulling rate and milling yield, and without peeling. It will be done. In the case of this example, since dehumidification drying is performed in both the intermediate drying step 1O and the final drying step 12, a dehumidifier with the same drying load is used to unhull the harvested rice on the same day the next day. It can be treated by rubbing, or it can be treated by reducing the moisture content to 17% in the intermediate drying step 10 and storing it for 35 days without ventilation, and then in the final drying step 12.
It is also possible to control the drying load to reduce the drying load. Next, the embodiment shown in FIG. 2 will be described. The cargo receiver 1, the intermediate drying process lO using dehumidification and drying, and the primary storage tank 11. The ventilator l3 is the same as the embodiment shown in FIG.

In this embodiment, thermal drying is used in the final drying step l4. Therefore, it is better to reduce the drying load in the final drying step 14 using thermal drying. For example, in the intermediate drying process lO using dehumidifying drying, moisture l
It is dehumidified and dried to 7% and stored in the primary storage tank 11 without ventilation. The harvested rice thus dehumidified and dried and stored in the storage tank 11 has a uniform moisture content of 17% due to the principle of dehumidification and drying, and there is no sloughing or cracking. Next, the harvested rice thus stored in the storage tank 11 is discharged from the storage tank 11 according to the required amount, and is dried to a moisture content of 16% in a final drying step 14 using thermal drying. In other words, it is only necessary to evaporate 1% water, from 17% water to 16% water. 0.0 when converted to hourly drying rate
5%/hour, slowing down the drying speed without raising the temperature of the paddy so much, and reducing the amount of stirring of the paddy to eliminate sludge, making it possible to accurately adjust the moisture content to 16%. Become. As a result, the rice can be hulled in the hulling process 6 without any problems in terms of milling yield, pulp removal rate, peeling, and taste. In the case of this example, an intermediate drying step l using dehumidifying drying
It is suitable for processing by increasing the drying load of O and reducing the drying load of the final drying step 14 using thermal drying. Next, the embodiment shown in FIG. 3 will be described. In this embodiment, thermal drying is used in the intermediate drying step 15, and dehumidifying drying is used in the final drying step 16.

In the case of this example, an intermediate drying step l using thermal drying
It is better to reduce the drying load in step 5. For example, in the intermediate drying step 15 using thermal drying, the material is dried to a moisture content of 22%. In other words, the moisture content of the harvested rice received at the receiving station is 24
It is sufficient to evaporate 2% moisture from % to 22%.
When converted to hourly drying loss rate, it is 0.1%/hour, so the drying speed is slowed down without raising the temperature of the paddy so much, and the amount of stirring of the paddy is reduced to eliminate sludge dropping. Then, it is stored in a 1 liter primary storage tank. Harvested rice with a moisture content of 22% stored in the primary storage tank 1l will not cause any problems if sent to the final drying process within the same day, but if it is stored for several days, it will be transferred to the primary storage tank 11 using a ventilation fan l3. Ventilate and store. Due to this ventilation, the moisture in the harvested rice in the primary storage tank 11 evaporates, but since the moisture content is 22%, it will not become over-dry. Also, due to ventilation storage, primary storage tank 1
Even if the moisture content of the harvested rice in step 1 and the intermediate drying step 15 is thermal drying, and the moisture content is uneven, the final drying step 1
Since step 6 is dehumidifying and drying, the final dry moisture content of 16% is uniform. It will be adjusted. In this way, the rice can be hulled in the hulling process 6 without problems with the milling yield, pulp removal rate, and texture. Regarding the embodiments shown in Figs. 1 to 3 above, the most likely processing mode has been explained, but the control of the drying load in the intermediate drying process and the final drying process depends on the processing status of harvested rice and the energy consumption. It is also controlled arbitrarily in relation to the milling yield and taste. Next, the embodiment shown in Figs. 4 to 6 will be explained.
The example shown here has a moisture content of 22% in the primary storage tank.
It was adjusted to ~17%. Further, in this embodiment, the harvested rice received at the receiving area 1 is stored directly in the primary storage tank 11, so as to alleviate congestion during harvesting, threshing, and transportation during the busy farming season.
In FIG. 4, the harvested rice received at the receiving tank 1 is directly stored in the primary storage tank 11. and stored water 2
4% harvested rice has a moisture content of 22% in the primary storage tank 1l due to the air at a predetermined humidity and temperature sent from the dehumidifying dryer l8.
% to 17%. Since the intermediate drying in this primary storage tank 11 is also dehumidified drying, the harvested rice stored according to the principle of dehumidifying drying is dried uniformly at almost room temperature without stirring. Harvested rice stored in this way is not over-dried, has no cracking, no loss of flavor, and no sludge falling off. In addition, in the case of this method, since air is sent into the 1 liter primary storage tank, it serves both as ventilation storage and intermediate drying. Therefore, the moisture content of the harvested rice discharged from the primary storage tank l1 is 22% to l7
It is a certain moisture percentage in the range of %. In other words, since the rice is dehumidified and dried, there is no variation in the moisture content of the stored harvested rice, and the moisture content of the harvested rice is equalized to 20% within the range of 22% to 17%, for example. The harvested rice that is dispensed according to the required amount of rice in this way is
The rice is dried to a moisture content of 16% in a final drying process 17 using dehumidification and drying, and then hulled in a hulling process 6. Since it is dehumidified and dried in this final drying step l7,
There is no cracking, no deterioration of flavor, and no grain loss, and the rice is hulled with the moisture content precisely adjusted to 16%. Therefore, the rice can be hulled without reducing the milling yield, causing peeling, degrading the taste, or reducing the rate of dehulling. The embodiment shown in FIG. 5 uses a thermal dryer l9 instead of the dehumidifying dryer l8 of the embodiment shown in FIG.
1, with intermediate drying at a moisture content ranging from 22% to 17%. In this example, the primary storage tank l
It is desirable to reduce the drying loss load of the intermediate drying in step 1 and increase the drying loss load of the final drying step 17 using dehumidifying drying. This embodiment also functions as both ventilation storage and intermediate drying, so it is suitable for long-term storage. In other words, by lowering the temperature of the air sent from the thermal dryer 19 and sufficiently reducing the drying load, the temperature of the stored paddy is gradually raised and the agitation is moderated, thereby preventing overdrying. This makes it possible to prevent cracking of the shell, loss of taste, and falling of the sludge. In addition, even when hulling is done the day after harvesting, it can be handled by setting the hourly drying loss rate to 0.1% during intermediate drying, so the drying loss rate is slow and there is no chance of hull cracking due to overdrying. No deterioration in taste or loss of texture occurs. The harvested rice that has been intermediately dried in the primary storage tank 11 in this way is then dried in a final drying step 17. Since the intermediate drying is thermal drying, there is some variation in the moisture content of the harvested rice discharged from the primary storage tank 11, but since the final drying step 17 is dehumidifying drying, the rice is dried uniformly and accurately to a moisture content of 16%. It will be done. Since the rice is hulled with a moisture content of 16%, no sludge falling off, and no hull cracking, the rice can be hulled in the hulling process 6 without any problems in terms of milling yield, plastic removal rate, skin slippage, and taste. Next, the embodiment shown in FIG. 6 uses thermal drying instead of the dehumidifying drying in the final drying step 17 of the embodiment shown in FIG. In the case of this embodiment as well, it is desirable to reduce the drying loss load in the final drying process 20 using thermal drying, and to increase the drying loss load in the intermediate drying process in the primary storage tank 11 using the dehumidifying dryer 18. That is, intermediate drying in the primary storage tank 11 is performed by dehumidification and drying using air whose humidity and temperature have been adjusted in the dehumidification dryer 18. Therefore, the harvested rice stored in the primary storage tank 11 is
It is dried at almost room temperature so that the moisture is evenly distributed. Also, due to the principle of dehumidifying drying, the lower limit of moisture content in the intermediate drying process is 17%.
Even if the product is dried to a maximum of 100%, it will not become partially over-dried, so it is possible to dry the product to the minimum moisture content and minimize the drying load of the thermal drying in the final drying step 20. As a result, in the hulling process 6, the rice is hulled without any problems in terms of milling yield, plastic removal rate, skin slippage, and taste. This example also
It serves as both ventilation storage and intermediate drying. Regarding the embodiments shown in FIGS. 4 to 6 above, the most likely processing mode has been explained, but the control of the drying load in the intermediate drying process and the final drying process depends on the processing status of harvested rice and the energy consumption. It is also controlled arbitrarily in relation to the milling yield and taste. It is also possible to use the dehumidifier used in the final drying step 17 in FIG. 4 instead of the dehumidifier 18. Next, the embodiment shown in FIGS. 7 and 8 will be explained. This embodiment is provided with a pre-process of receiving harvested rice received at a receiving tank 1 into a receiving storage tank 2 liters and equalizing the moisture content. In the case of this example, consideration was given to alleviating congestion during harvesting, threshing, and transportation during the busy farming season, as well as taking into consideration variations in moisture due to weather and other factors, and long-term storage of the entire amount. The receiving storage tank 2L is designed to serve both as ventilation storage and moisture averaging drying.

In FIG. The harvested rice is directly received into the receiving storage tank 21. Then, the storage tank 2 receives the air whose humidity and temperature have been adjusted by the dehumidifying dryer 22.
1, and dehumidify and dry at a moisture content of 24% to 20%. As a result, the moisture content of the harvested rice in the 2L receiving storage tank is averaged and the rice is ventilated and stored. Next, the harvested rice is dried to a moisture content ranging from 22% to 17% in an intermediate drying step 10 using dehumidifying drying, and stored in a primary storage tank 11. The rice is then discharged according to demand, dried to a moisture content of 16% in a finishing drying process 12 using dehumidifying drying, and hulled in a hulling process 6. In this processing process, for example, when storing the entire amount of harvested rice for 35 days, it is best to dry it to 17% moisture in the intermediate step 1O using dehumidification and drying, and then store the entire amount in a 1L primary storage tank without ventilation. It is preferable in terms of energy, and since the intermediate drying step 10 is dehumidifying drying, the moisture content of the rice grains is uniform, and there is no movement of moisture in the primary storage tank 11. Therefore, the moisture 1 of harvested rice stored in the primary storage tank 1
7% is highly reliable and makes it easy to manage mold growth even if stored for a long time. In addition, when storing for a longer period of 35 days or more, ventilation is stored in the receiving storage tank 21, and the drying reduction load of the dehumidifying dryer 22 is controlled with respect to the number of storage days to prevent overdrying with a moisture content of 16% or less. In addition, the receiving storage tank 21. Since the intermediate drying step 10 and the final drying step 12 are both dehumidifying drying, the milling yield, dehulling rate, skin slippage, and taste in the hulling step 6 are similar to the example shown in FIG. 1 described above. Since they are the same, their explanation will be omitted. Next, the embodiment shown in FIG. 8 is the same as the embodiment shown in FIG. 7 except that the dehumidifying dryer 22 is replaced with a thermal dryer $3123. That is, the harvested rice directly received into the receiving storage tank 21 is thermally dried to a moisture content in the range of 24% to 20% by hot air sent from the thermal dryer 23, and is stored in ventilation storage. By drying with a reduced drying load, there is no overdrying, no cracking, no sloughing, no deterioration in flavor, and the moisture content is evened out. In addition, within the receiving storage tank 2l, water is moved due to long-term storage, contributing to uniformity of the water content. Equalizing the moisture as a pre-process in this way helps control the subsequent intermediate drying process, final drying process, and hulling process. It is possible to quickly respond to demand without causing deviations or loss of flavor, and it can be applied to a variety of processing methods such as long-term storage or short-term processing. Note that natural ventilation may be used instead of the dehumidifying dryer 22 and the thermal dryer 23. (Effects of the Invention) As detailed above, according to the present invention, harvested rice is intermediately dried and its moisture content is in the range of 22% to 17%, so that rice harvested on the same day can be processed within a few days. In addition to making it possible to use dehumidifying drying for this processing mode, it is also possible to process harvested rice in a state where the drying rate of dehumidifying drying is the best, and it is also possible to store it for a long time, so that it can be harvested during the busy farming season. It is possible to reduce labor by distributing labor intensive tasks such as receiving cargo, drying, and hulling rice. In addition, by making it possible to use dehumidifying drying in this way, it is possible to improve the milling yield, improve the deblubbling rate, reduce skin slippage, and maintain flavor. By combining dehumidifying drying and thermal drying, In addition to improving the above-mentioned milling yield, etc.,
It has excellent effects such as being able to handle all types of processing.

[Brief explanation of the drawings] Figures 1 to '8 show one embodiment of the present invention, and Figure 1 is a schematic diagram when dehumidifying drying is used for intermediate drying and final drying. Figure 1 is a schematic diagram of the case where thermal drying is used for the final drying, and Figure 3 is a schematic diagram of the case where thermal drying is used for the intermediate drying of Figure 1. Schematic diagram, Figure 4 is a schematic diagram of a case where a dehumidifying dryer is used to perform intermediate drying while primary storage, and dehumidifying drying is used for final drying. Figure 5 is a schematic diagram of a case where a dehumidifying dryer is used instead of the dehumidifying dryer shown in Figure 4. Fig. 6 is a schematic diagram of the case in which thermal drying is used for the final drying in Fig. 4, Fig. 7 is a schematic diagram of the case in which a dehumidifying dryer is used to receive and store the product,
Figure 8 is a schematic diagram when a thermal dryer is used instead of the dehumidifying dryer shown in Figure 7. Figure 9 is a schematic diagram showing the conventional processing method for harvested rice, Figure 10
The figure is a schematic diagram of another conventional example, and FIG. 11 is a schematic diagram of still another conventional example. 1... Receiving goods, 6... Husking process, 10, 11,
18. 19... intermediate drying step, 12, 14,
16, 17. 20...Finishing drying process patent applicant Toyooh Industries Co., Ltd. (2 idiots) 4th 1st 12 E ゛3 313 1. ．． a receiving 6/#7 sliding process 10, 11,
18.19 Central FA Dry Food 12, 14, 16, 77
, 2≧(:) 1 i:=:. :: ・f 7th 5th Nose and 2nd 7th L1 Mei 8 yo

Claims (1)

[Scope of Claims] (1) In a method for processing harvested rice in which the harvested rice is dried and then hulled, the moisture content of the harvested rice is once intermediately dried between 22% and 17%, and then the A method for processing harvested rice characterized by finishing and drying intermediately dried harvested rice to a predetermined moisture content. (2) A claim characterized in that the received harvested rice is intermediately dried to a moisture content of 22% to 17% and then primary stored, and the primary stored harvested rice is finished to a predetermined moisture content and dried before being hulled. The method for processing harvested rice according to item 1. (3) The method for processing harvested rice according to claim 2, characterized in that intermediate drying and final drying are dehumidified drying. (4) The method for processing harvested rice according to claim 2, characterized in that the intermediate drying is dehumidified drying and the final drying is thermal drying. (5) The method for processing harvested rice according to claim 2, characterized in that the intermediate drying is thermal drying and the final drying is dehumidifying drying. (6) Receive and store the harvested rice that has been received, intermediately dry the moisture content of the harvested rice to 22% to 17% during this reception and storage, and dry the harvested rice that has been received and stored and intermediately dried before hulling. 2. The method for processing harvested rice according to claim 1, further comprising finishing and drying the rice to reduce moisture. (7) The method for processing harvested rice according to claim 6, characterized in that intermediate drying and final drying are dehumidified drying. (8) The method for processing harvested rice according to claim 6, characterized in that the intermediate drying is thermal drying and the final drying is dehumidifying drying. (9) The method for processing harvested rice according to claim 6, characterized in that the intermediate drying is dehumidified drying and the final drying is thermal drying. (10) Receive and store the harvested rice that has been received, and dry the harvested rice to equalize the moisture content during the reception and storage, and reduce the moisture content of the harvested rice to 22% or more.
Processing of harvested rice according to claim 1, characterized in that the harvested rice is intermediately dried to a moisture content of 17% and then stored for the first time, and the harvested rice that has been stored for the first time is finished and dried to a predetermined moisture content before hulling. Method. (11) The method for processing harvested rice according to claim 10, characterized in that moisture-averaging drying, intermediate drying, and final drying are dehumidified drying. (12) Claim 1 characterized in that the moisture-averaging drying is performed by thermal drying, and the intermediate drying and final drying are performed by dehumidifying drying.
The method for processing harvested rice described in 0. (13) The method for processing harvested rice according to claim 10, characterized in that the moisture-averaging drying is carried out by natural ventilation drying, and the intermediate drying and finishing drying are carried out by dehumidifying drying.