JPH03191288A - Grain drying apparatus - Google Patents

Abstract

PURPOSE:To keep intake air at a predetermined normal temperature for satisfactory drying of the air stabilized at all times by providing, at a fresh air intake port of a grain dryer, a dried air producer which supplies air of regulated humidity at ordinary temperature. CONSTITUTION:The subject apparatus includes dry air producers 61 provided on a bin 9 and a drier 14 each for supplying air of regulated humidity at ordinary temperature. The dry air producer 61 comprises a cooling dehumidifying evaporator 62, an ordinary temperature restoring condenser 63, a fresh air intake duct 65 for taking in humid air through a dehumidification adjusting flap 64, and a regulated dehumidification damper 66 for adjusting the air flow of the air of regulated humidity at ordinary temperature by mixing air dehumidified at ordinary temperature produced by the evaporator 62 and the condenser 63 and humid air from the duct 65. Unfulled rice in each bin chamber 9a is previously dried with use of the air of regulated humidity at ordinary temperature from the producer 61 during the time the unfulled rice is resident in the storage bin 9. Drying temperature is restricted to a low temperature, no quality lowering is produced thereat.

Description

Detailed Description of the Invention r Industrial Field of Application J The present invention relates to grain drying facilities such as country elevators, which target grains such as rice or wheat, and are comprised of a receiving section, a drying section, a storage section, a preparation and shipping section, etc. .

``Conventional technology'' For example, in the case of drying rice, high moisture content (approximately 24% moisture)
Because we receive a large amount of paddy, we separate the drying process into primary (down to about 17% moisture) and secondary drying (down to finishing moisture of about 14.5%) to maintain the quality of the paddy and reduce the processing capacity of the facility. We are trying to improve this.

``Problem to be solved by the invention'' However, in such drying, temperature control when drying paddy to a target moisture level is not only based on the moisture level to be removed, but also based on the dryer. The problem is that control must be performed under temperature conditions that are determined each time depending on changes in humidity and temperature, as the temperature is greatly affected by changes in the humidity and temperature of the air taken into the air.

"Means for Solving the Problems" Accordingly, the present invention provides a dry air generator for supplying normal temperature and constant humidity air to the outside air intake port of a grain dryer.

The drying temperature control means of the grain dryer is configured to input humidity and temperature data of the air supplied from the generator, and to control the drying temperature in the grain dryer based on these data values. .

"Function" According to the present invention, the temperature and humidity of the hot air taken into the dryer are kept constant at room temperature, and the moisture content of the grains is reduced without being affected by these temperatures and humidity. It is possible to perform accurate temperature control based only on the value, and temperature control can be made accurate and easy, and the quality of grain can be maintained.

``Example'' An example of the present invention will be described in detail below based on the drawings. 1st
The figure is an explanatory diagram of the drying section, Figure 2 is a plan explanatory diagram of the entire facility,
Figure 3 is an explanatory diagram of the same work process, which is equipped with a cargo receiving section (1) that receives raw paddy, which is the raw material brought in individually and by cargo, from a cargo receiving hopper (2) to a receiving conveyor (3) and an elevator (4). ); a rough sorter (5) that removes impurities from the paddy that is received through the grain picker; a receiving weighing machine (6) that measures the tube mouth weight and moisture content for each rough sorter and each consignment; and the weighing machine. (6
), storage bins (9) are provided in the cargo receiving section (11), into which raw paddy is carried in via a bin loading elevator (7) and a top conveyor (8) and temporarily stored therein before drying.

In addition, it is equipped with a drying section (lO) that dries the raw paddy after receiving it by repeating drying and temporary suspension to equalize the moisture inside the grain and prevent shell cracking. The paddy is transferred to the bottom conveyor (11) and the bin discharge elevator (1).
2) and a dryer (14), which is a thermal dryer that is carried in via a dryer loading elevator (13) and removes a predetermined percentage of moisture each time, and a temporary drying stop that is taken out from the dryer (14). The paddy is removed from the dryer by the conveyor (1
5) and an elevator (16), a drying silo elevator (17), a sub-silo (19) which is a tempering tank carried in via a charging conveyor (18), and semi-dried paddy taken out from the sub-silo (19). The drying section (lO) is equipped with a drying silo take-out elevator (21) that sends the paddy to the dryer (14) again via the drying silo take-out conveyor (20), and the dried paddy in the drying section (10) is transferred to the storage section ( 22).

Further, the storage section (22) stores dried paddy from the drying section (lO) through the conveyor (15) and the elevator (161(
171 and a main silo (23), which is a storage silo carried in and stored via a conveyor (18), and the silo (23).
) is transported through a silo take-out conveyor (24) and a sorting machine input elevator (25), and a sorting machine (26) that removes impurities from the dry paddy and separates it, and a sorting machine (26).
) The carefully selected first-grown and demixed rice is sold to a weighing machine (2).
7) and an adjustment tank (30) into which the rice is fed via the sorting machine take-out elevator (28) or the rice deweighing elevator (29), and an awning machine for removing the awns from the awned paddy taken out from the sorting machine (26). (31), and a selected silo elevator (33) for transporting selected paddy after weighing for sale to the main silo (23) via a selected silo input conveyor (32), and the adjustment tank (30)
The selected paddy is sent to the preparation and shipping section (34) for the next process.

The adjustment and shipping section (34) includes a huller (36) that transports selected paddy from the adjustment tank (30) via a paddy elevator (35) and removes the rice from the huller (36), and A vibrating sorter (38) transports the demixed mixed rice through a mixed rice elevator (37) and extracts only good brown rice, and a vibrating conveyor (39) and a brown rice elevator convey the brown rice from the vibrating sorter (38). (40)
A grain sorter (
41) and a stone removal machine (42) that removes stones from brown rice after grain selection.
), and a flexible container (4) into which the good brown rice after destoning is fed via the good brown rice elevator (43).
4) and a packaging and shipping tank (45).
6), an unripe rice tank (48) into which the unripe rice taken out from the grain sorter (41) is carried in via the unripe rice elevator (47) and the demixing rice elevator (29), and the good brown rice elevator (48);
The machine is equipped with a rice milling machine elevator (49), a brown rice tank (50), and a polished rice tank (52) into which good brown rice from the rice milling machine 151) is fed.

In addition, (53) is the receiving room, (54) is the office, (55)
(56) is the main operation room, and (56) is the blower (
(57) is a blower room in which the storage bin (58) is installed;
(9) is the dust removal chamber installed in parallel with the dust removal chamber 158), (59) is the dust removal chamber 158)
(60) is a product storage area.

By the way, a dry air generator that supplies air at room temperature and constant humidity (
61) is provided in the bottle (9) and the dryer (14), and the generator (61) is connected to the cooling and dehumidifying evaporator C6.
2), a normal temperature restoration condenser (63), an outside air intake duct (65) that takes in humid air via a dehumidification adjustment flap (64), and a normal temperature dehumidification generated in the evaporator (62) and condenser (63). Air and said duct (65
), and the storage bin (9) is equipped with a damper for pre-drying (66) which adjusts the flow rate of room-temperature and constant-humidity air mixed with humid air from Connect the generator (61) to the blower (57),
), the air at room temperature and constant humidity is sucked into the blower (57) and sent into each bin room (9a), thereby reducing the moisture difference between the raw rice stored in each bin room (9a). It is designed to be pre-dried as described above.

As shown in FIG. 1, the dryer (14) supplies the paddy in the condensation tank (67) to an endless slat chain conveyor (70) that is moved on top and bottom ventilation floor plates +681 (691) with a louver bed structure. Then, while the paddy is flowing by the conveyor (70), hot air from the burner (71) is supplied to the paddy by the blower (72), and the paddy is dried to a predetermined moisture value and then passed through the grain drying outlet (73). The outside air intake port (74a) of the soundproof chamber (74) of the dryer (14) is
) is provided with the generator (61), and the air at normal temperature and constant humidity supplied from the generator (61) is supplied to the blower (72).
) is taken into the dryer (14) by suction force, and the paddy is dried using constant-humidity hot air.

As shown in FIG. 5, a temperature sensor (75) and a humidity sensor (76) are provided near the outside air intake port (74a) of the soundproof room (74) to detect the temperature and humidity of the air taken in. A moisture sensor (77) is provided in the condensation tank (67) to detect the moisture value of the paddy in the tank (67).
and a humidity adjustment mechanism (78) of the generator (61).
The outputs of these sensors (75) (761 (771) are connected to the central controller (80) which is a control means for driving and controlling the hot air temperature adjustment mechanism (79) of the dryer (14). 76) (Dehumidification control of the generator (61) or dryer (based on the detected value of 771)
14) The hot air temperature control is performed.

The present embodiment is constructed as described above, and the paddy in each bin chamber (9a) is pre-dried by normal temperature and constant humidity air from the generator (61) while the paddy is stored in the storage bin (9). In this case, the air in the bin room (9a) is not heated by using normal temperature and constant humidity air, and the moisture in the air is removed and dry air with a constant humidity is sent to increase the amount of paddy. Naturally dry to an equilibrium moisture content with almost no difference,
During work in the dryer (14) in the post-process, the drying temperature can be kept low enough to avoid quality deterioration, thereby preventing inconveniences such as excessive drying and the generation of large amounts of cracked grains. are doing.

Moreover, in the dryer (14), the generator (6
By introducing normal temperature and constant humidity air from 1), the 6th
As shown in the flowchart in the figure, the temperature of the hot air from the dryer (14) is adjusted by the adjustment mechanism (79) to a temperature calculated only according to the moisture value of the paddy, keeping these constant and not affected by outside temperature and humidity. The adjustment mechanism (7
8) The set humidity of the intake air is further adjusted to a lower value, and the temperature of the hot air from this dryer (14) is kept below the appropriate temperature. Dryer like this (14)
By always keeping the humidity and temperature of the air taken into the rice constant, the drying temperature can be accurately calculated and set based on a simple functional relationship between the moisture value of the paddy and the drying temperature. It can be made simple.

"Effects of the Invention" As is clear from the above embodiments, the present invention provides a dry air generator (61) for supplying normal temperature and constant humidity air to the outside air intake port (74a) of the grain dryer (14). Therefore, the air taken into the dryer (14) can be kept at room temperature and constant humidity, making it possible to always perform stable and good drying without being affected by the air taken in.

The drying temperature control means (80) of the grain dryer (14)
) inputs the humidity and temperature data of the air supplied from the generator (61) and controls the drying temperature in the grain dryer (14) based on these data values. Temperature control based only on the moisture value with humidity and temperature as constants becomes possible, this temperature control can be made easy and accurate, and the quality of the grain can be maintained, which is a remarkable effect.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the drying section, Fig. 2 is a plan explanatory diagram of the entire facility, Fig. 3 is an explanatory diagram of the work process, Fig. 4 is an explanatory diagram of the storage bin section, Fig. 5 is a control circuit diagram, FIG. 6 is a flowchart. (14)... Dryer (dryer) (61)...
Generator (74al...Outside air intake

Claims (2)

[Claims] (1) A grain drying device characterized in that a dry air generator for supplying room-temperature and constant-humidity air is provided at an outside air intake port of the grain dryer. (2) The drying temperature control means of the grain dryer is configured to input humidity and temperature data of the air supplied from the generator, and control the drying temperature in the grain dryer based on these data values. 2. The grain drying device according to claim 1, characterized by: