JPS59104072A - Method of drying cereal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for drying grains that have uneven moisture content and cannot obtain an accurate detected moisture value at the initial stage, but can be dried at a predetermined value with 9# water content or hourly drying rate. Even if both the grain temperature and the hourly drying rate are controlled to be below a predetermined value at the same time during the drying process, the set hourly drying rate The present invention relates to a method for drying grains that can efficiently dry grains with less occurrence of shell cracking by controlling a heating device or a blower device so as to maintain the drying temperature.

Conventionally, in order to obtain dried grains with less occurrence of shell cracking and good taste, drying is required. The grain temperature and hourly drying rate of the proboscis are sequentially detected over time, and the grain temperature and hourly drying rate are kept below a preset value of 15r in accordance with the moisture content of the grain. vl′J
The drying method was previously disclosed in Japanese Patent Application Laid-open No. 55-15047 by the present applicant.
It has been developed and known as described in Publication No. 5.

The main purpose of the above-mentioned conventional grain drying method is to automatically dry the grain to be dried so as to minimize the occurrence of shell cracking and improve the taste.

By the way, the amount of moisture contained in the harvested I# grains is not always constant, and there are differences in compatibility, and the dried grains, which have a lot of moisture unevenness among the grains, are directly processed into the above-mentioned known grains. When drying using a drying method, the detected hourly drying loss rate detected over time changes rapidly in the early stage of drying, and the heating device and blower device must be operated each time. Since the drying rate is controlled 1, it is difficult to accurately control (111) the drying rate to be less than a predetermined value.

Moreover, when the initial grain temperature of the grain to be dried is 30°C or higher or the initial moisture content is 30°C or higher, the moisture unevenness among the grains to be dried is greater than before, making the detection of the hourly drying rate more accurate. However, when drying grains to be dried according to a predetermined value to reduce cracking and improve taste, the drying time takes a long time and is not suitable for practical use. There is.

Therefore, when the above-mentioned grain proboscis is dried at a faster drying speed to make it suitable for practical use, both the detected grain temperature and the hourly drying rate of the grain to be dried are equal to or higher than a preset value. Therefore, it cannot be controlled to a predetermined value or less, and as a result, there are serious drawbacks in that not only many shell cracks occur but also the taste is significantly deteriorated.

SUMMARY OF THE INVENTION In order to solve the drawbacks of the known grain drying methods, the present invention aims to solve the above-mentioned drawbacks of the known grain drying methods. Initial drying is performed at a constant hot air temperature to eliminate moisture unevenness among grains to be dried. The heating device and the blower device are controlled so that the detected drying rate is below a predetermined value. In the case of drying, if both the detected grain temperature 2 and the detected hourly drying rate cannot be controlled to be below the predetermined value at the same time, both the heating device or the air blower should be adjusted to maintain the set hourly drying rate. Alternatively, it is an object of the present invention to provide a grain drying method that can efficiently dry provisionally dried grains with less occurrence of shell cracking by controlling one of the operations.

In view of the above, and in order to solve the drawbacks of the known grain drying methods, the present invention has been developed by sequentially detecting the grain temperature and hourly drying loss rate of the grain to be dried over time. In the early stage of drying when there is a lot of moisture unevenness between grains, initial drying is performed at a preset constant hot air temperature of 11p, and after the moisture unevenness among the grains to be dried has decreased, the detected grain temperature obtained Then, dry the grain while controlling one or both of the heating device and the blower device so that the detected hourly drying loss rate is below a preset value according to the moisture content of the grain, or If it is not possible to simultaneously control both the detected vortex and the detected hourly drying rate to a predetermined 11th point or higher, control only one or both of the heating device and the blower device. ) is also a grain drying method that finishes drying while maintaining the set hourly drying loss rate.
Even if there is a lot of moisture unevenness in the amount of drying W material at the beginning of drying, the moisture unevenness can be quickly resolved to ensure accurate detection of the hourly drying loss rate, and the detection of grain temperature and detection of the dried grain. It is possible to accurately operate the heating device and the blower device so that the hourly drying loss rate is below a predetermined value set in advance, and to efficiently obtain V-dried grains with less occurrence of shell cracking and good taste. Even if the grain to be dried has a high initial width or initial moisture content, it is possible to sow efficiently with less occurrence of shell cracking as long as the taste is tolerated to some extent.

A block circuit for carrying out the grain drying method according to the present invention will be explained below.

In FIG. 1, reference numeral 1 denotes a grain temperature detector for detecting the grain temperature of the grain to be dried over time during the drying time and sending the detected signal to the comparator circuit 4, which is a grain temperature detector according to the present invention. The detector 1 is designed to detect the grain temperature of the grain to be dried over time, for example every hour, from the beginning of drying to the end of drying. Reference numeral 2 denotes an hourly drying loss rate detector for detecting the hourly drying rate, that is, the drying rate of the grain to be dried over time during the drying time, and sending the detected value to the comparator circuit 4, which is an hourly drying rate detector of the present invention. The hourly drying loss rate detector 2 detects the hourly drying rate, that is, the drying speed, of the grain to be dried over time from the beginning of drying to the end of drying, for example, every hour.

Reference numeral 3 denotes a grain temperature and hourly drying rate standard setting circuit, and when the intergrain temperature and hourly drying rate are accurately detected, the circuit 3 sets the standard setting circuit according to the moisture content of the object. It has the role of sending the determined grain temperature reference value and hourly drying rate reference number Ig of the first shift to the comparison circuit 4, respectively. Therefore, the grain temperature and hourly drying rate reference setting circuit 3 sends signals of the grain temperature reference value and the hourly drying rate reference value to the comparing circuit 3 at the beginning of drying when there is a lot of moisture unevenness among the grains to be dried. These signals are sent to the comparator circuit 4 after the unevenness between the pieces to be dried is reduced. In the present invention, based on experimental results, the moisture content of the grain to be dried is set to, for example, Ij@21.5.

In addition, the above 1# and hourly drying rate standard setting circuit 3 includes:
As shown in the drying curve graph of Figure 2, for example, drying 1#8 grain whose moisture content has become approximately 21.5% due to the initial drying operation is reduced to approximately 100% until the final moisture content reaches 15%. 3
Grain temperature standard table that can be maintained at 8℃ or less and approximately 2
The hourly drying rate standard 1 is determined to be, for example, 0.6%/hour for finishing drying grains having a moisture content of 1.5% to a final moisture content of about 15%. The reason why the minimum moisture content in each of the above standard tables is set to 15% and the upper limit is set to infinity is that the harvested grain is approximately 154%.
This is for the purpose of drying it to a certain extent.

4 are the signals sent over time from the grain temperature detector 1 and the hourly drying rate detector 2, and the signals sent over time from the v section and the hourly ψ゛ reduction rate base setting circuit. This is a comparator circuit for comparing the signal and sending a signal to the f-control circuit 5 of the heating device 6 and the blower I. , or the grain temperature detected by the grain temperature detector 1 and the hourly drying rate detection circuit 2 during the drying operation. and the grain temperature standard table in which the hourly drying rate values are set in advance and the values determined as the hourly drying rate reference values (for example, grain temperature is 38°C, hourly drying rate is 0.
6/hour), it immediately sends a signal to the control circuit 5 to control the amount of fuel supplied to the heating device 6' and/or the amount of air blown M and/or the amount of air blown 7. By increasing/decreasing only one side, the detected hourly trunk loss rate is controlled so that only the detected hourly trunk loss rate is maintained at a preset hourly drying rate reference value (for example, 0.6 sections/hour), which reduces the occurrence of trunk cracking. , so that grain can be harvested efficiently.

Therefore, the grain temperature of the dried grain is the value in the grain temperature standard table, (
For example, even if the grain temperature becomes higher than 38° C., the heating device 6 and the blower device 7 are not controlled to make the grain temperature a few degrees below the grain temperature reference table. In addition, during a period when there is a lot of pressure and moisture unevenness among grains to be dried, the heating device #6 and the blower device 7 are operated to generate hot air at a constant temperature of, for example, 48°C, regardless of the control circuit 5. Initial drying is carried out between grains to be dried in a width of one vessel until the moisture content is reduced to reduce the occurrence of moisture unevenness (for example, about 21.5%), and thereafter the process is shifted to an automatic wholesale drying vessel.

Note that the oven width, hourly drying rate standard table (predetermined values of the present invention) and hot air temperature mentioned above can be adjusted at any time based on conditions such as the amount of grain, the humidity introduced by the outside air, the desired drying speed, and the grain to be dried. Of course, the numerical values are subject to change.

Next, its effect will be explained.

Now, when you want to finish dried grain with an initial moisture content of, for example, 29 qb, and dry it so that it has a moisture content of 15, first!
l; At the start of drying, measure the moisture content of the grains to be dried using a moisture meter, and if there is uneven moisture content among the grains to be dried, operate the heating device 6 and the blower device 7 to dry the grains in advance. Initial drying is performed at a constant hot air temperature (for example, 48° C.).

By the way, even in this early stage of drying, the detected grain temperature value and the detected number of cars turning over per hour 1i1 detected over time by the IF-1 detector 1 and the hourly If accuracy rate detector are sent to the comparison circuit 4 every issue. It is being

In the past, when the grains to be dried, which were 29% of the water-containing carriageway, were dried to a moisture content of about 21.5% through this initial drying process, the moisture unevenness among the grains to be dried was significantly reduced, and the grain temperature detector 1 and the hourly drying rate value detected by the hourly drying rate detector 2 become stable. In such a situation, the grain temperature and hourly drying rate standard setting circuit 3
Over time, the oven width standard number 1・a (e.g. 38°C) and the hourly drying rate basic thread value (e.g. 0.6%/11♀ ) becomes a signal in the □ circuit and is sent to the comparator circuit 4 where it is compared.

As a result, the moisture content of the dried grain was determined to be between 21.5% and 1% by the time-dependent detection function of the above-mentioned Radiation Inspection Instrument 1 and Hourly Drying Rate Standard Table 2.
Up to 5qb, the grain width is below 38℃ and the hourly drying rate is 0.
It will be less than 6%/hour5 fl+lI ri11 circuit 5
A signal is sent to the control information to automatically open one or both of the heating device 6 and the feeding device 1θ1, respectively.
Then, the drying process is continued until the moisture content reaches approximately 15%, and the drying process is completed.

In addition, using the above drying method, if the initial grain temperature is 30°C or higher,
Alternatively, if you try to quickly dry the material to be dried with an initial moisture content of 30% or more based on the grain η^ of the drying method described in Section 11 and the hourly drying loss rate standard table, Detection 2 and Detection Both hourly drying rates are set to predetermined values (e.g. grain temperature of 38°C).
, hourly I# reduction rate of 0.6 units/hour) or less may not be possible and the case may occur. If something like this is detected by the furnace width detector 1 and the hourly drying rate detector 2, at this point the comparison circuit 4 operates and calculates only the hourly drying rate from the preset hourly drying rate reference table. A signal is sent to the control circuit 5 to maintain the numerical value (for example, 0.6 coefficients/hour), and the amount of fuel supplied to the heating device 6 or the amount of fuel supplied to the air bag by 7 is sent to the control circuit 5.
Temporary drying is performed by automatically controlling both or either of t and the detected hourly drying rate while maintaining the hourly drying rate number 1i & (for example, 06%/hour) set in advance in the standard table. To efficiently dry grains with less cracking and to a finished moisture content of, for example, 15.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of a fire application method according to the present invention, and FIG. 2 is a single-axis single curve graph using a predetermined ratio and hourly dry carpet base i+M. 1... Grain temperature detector, 2... Hourly drying rate detector, 3.
... Grain temperature and hourly drying rate reference setting circuit, 4... Comparison circuit, 5... Control circuit, 6... Warming device, 7...
Patent attorney representing applicant Kaneko Agricultural Machinery Co., Ltd. for blower equipment % 1-, Arco 8 D Kyoto -: ; Indication cfXi, +1 1986-213192 No. 2, Name of the invention Grain drying method 3, Relationship with the case of the person making the amendment Patent applicant No. 2-21-1-1 Nishi, Hanyu City, Saitama Prefecture (146) Representative of Kaneko Agricultural Machinery Co., Ltd. Kaneko Aijibe 4, Agent 201-5, Date of amendment order March 9, 1980 6, Subject of amendment "Column for brief explanation of drawings" 7. Contents of amendment fil Specification, page 12, No. "The drawing is" written in line 17 will be corrected to "Figure 1 is".

Claims (1)

[Claims] The grain temperature and hourly drying rate of the grain to be dried are detected sequentially over time, and in the early stage of drying when there is a lot of moisture unevenness among the grains to be dried, initial drying is performed at a preset constant hot air temperature.
After the moisture unevenness among the grains to be dried is reduced, the detected grain temperature and the detected hourly drying loss rate are adjusted to the moisture content of the grain and are adjusted to be equal to or lower than the preset Qt constant pressure. Either one or both of the heating device and the feeding device are dried with the open side, or both the detection temperature and the detection hourly drying rate of the grain to be dried are simultaneously reduced to below a predetermined value. If this is not possible, drying should be completed while maintaining the set hourly drying rate while controlling either or both of the heating device and the feeder. Grain threats and drying methods.