JP2751795B2 - Grain storage equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE rice, wheat, and have you at the time of storage of grain, such as corn, depending on the heat that grain is produced for development
And the quality of the grain is reduced. For this reason, temperature and humidity must be suppressed to certain limits. The present invention relates to an apparatus for keeping the temperature and humidity of the stored grain constant.

[0002]

2. Description of the Related Art Conventionally, as a method for maintaining the temperature and humidity of cereals, in bagged cereal storage warehouses, only air conditioning in the warehousing has been stopped.

[0003] In addition, in the storage tank of the silo or the like, cereal once unloaded outside the storage tank of the silo or the like, to be back again to the silo or the like storage tank to lower the temperature and humidity of the grain is common by the outside air ventilation
there were.

[0004]

It is extremely difficult to maintain a constant temperature and humidity of a grain by air-conditioning a warehouse storing bagged grains, and it is usual to produce a temperature difference and a humidity difference. is there.

[0005] The following 15 ℃ in the example of the temperature of the grain such as rice in storage tank silo or the like, it is necessary to suppress the humidity to about 15%, by the outside air ventilation is once transported to a storage tank outside the silo or the like It had lowered the temperature and humidity, unloading grain from the reservoir, such as a regular silo, carrying the worn grain, resulting trauma, quality deterioration such as degradation, yet produces a non-uniform temperature and humidity of the grain Was. There were also problems such as an increase in maintenance costs.

On the other hand, for example, Japanese Patent Laid-Open No. 52-1225
In Japanese Patent No. 35, a cooler is installed in a storage tank such as a silo,
Circulate air in silos for long-term storage of cereals
What can be done is described. Also, the gazette
Is an elevator for transporting stored goods in the center of the silo
Circulating cool air from the cooler to the duct
An apparatus for pre-cooling grains and the like is also described.

[0007] In addition, Japanese Patent Application Laid-Open No. 57-122713.
Has a grain storage tank inside the cool room,
Cold air circulating in a vertical cold air passage that passes through the storage tank
To dry the paddy during storage and temperature sensing during storage
Stored at 20 ° C or less by circulating cold air linked to the container
A cereal dry storage device is described.

[0008] However, Japanese Patent Application Laid-Open No. 57-122713.
No. is stored in a cool room equipped with a cooler.
For private small storage devices with tanks
Large storage tanks, such as silos, require only structural aspects.
It is not suitable in terms of efficiency.

Japanese Patent Application Laid-Open No. 52-122535 discloses
This is for relatively large storage tanks.
Cooling equipment and elevator ducts for transport in storage tanks such as iro
When considering large capacity, the structural
It is not sufficient in terms of cooling efficiency and economic efficiency.

The present invention addresses these problems in the prior art.
The structure of the storage tank is relatively simple.
Pure, suitable for large capacity, and excellent in cooling efficiency and economy
It is intended to provide a grain storage device.

[0011]

A grain according to claim 1 of the present application.
The material storage device includes a storage tank for storing grain, and a storage tank for storing the storage tank.
Primary and secondary heat exchangers installed outside and
The cooling air circulation path by connecting the lower with the ventilation pipe
And circulate through the ventilation pipe with the primary heat exchanger.
Heat exchange between the cooling air and the external cooling source
And cooled by the primary heat exchanger in the secondary heat exchanger
Heat exchange between the cooling air and the grains carried into the storage tank
And the secondary heat exchanger
Cooled grain is transported into the storage tank through the grain delivery pipe
And stored in bulk, cooled by the primary heat exchanger
Cooling air is introduced into the storage tank with the blower and ventilation piping.
Through the grain layer stored in bulk
And place it in the storage tank or piping for ventilation.
The information of the placed temperature sensor is transmitted to the primary heat exchanger and the secondary heat exchanger.
Feeds back to the next heat exchanger to control the cold heat source,
It is important to keep the temperature and humidity of the grains inside
It signifies.

In the present invention, the above structure was allowed to cool beforehand grain prior to storage, the layer of grain <br/> bulk state after storage in the reservoir, such as a silo, for example evaporation of liquefied gas Pass the air cooled by heat to keep the grain temperature and humidity constant. Passing gas is not good any other inert gas may be in the air. Cold heat source may be a low-temperature liquefied gas such as LNG, for example, as described above utilized in heat exchangers, by the to the low-temperature liquefied gas may be utilized vaporization heat of the vaporized in an evaporator refrigerator Cooling heat may be used.

[0013] In the temperature sensor captures the temperature of the air immediately after passing through the inside with a layer of or to or cereal be caught temperature direct grain stored grains, the temperature of the cooling air which is fed back to the cold heat source It shall be controlled appropriately.

[0014] The pressure at which the cooling air passes through the bed of grain should be obtained with a blower or a compressor. However, the passage resistance of a grain layer normally piled in bulk is high when the grain layer is as high as 10 to 20 m, and the cooling air may not pass through the grain layer efficiently.

[0015] To solve this problem, storage in bulk
In the above-mentioned grain layer, hollow steel balls are used for grain particles.
By mixing ventilation balls with many small holes,
Cooling air can pass through the grain layer uniformly and efficiently.
And air permeability is improved.

[0016]

FIG. 1 shows an embodiment of the present invention. A storage tank 2 such as a silo , a primary heat exchanger 3 and a secondary heat exchanger 4 installed outside the storage tank 2, and a blower 5 are connected to a ventilation pipe 12,
Circulation route of cooling air connected by 13,15,16,17
, While for cereals, the cereal piping 20,2
1 forms a carry-in path via the secondary heat exchanger 4.
You.

In such an arrangement, the secondary heat exchanger 4
The grain cooled in advance is carried into the storage tank 2, and the storage tank 2 sucks dry cooling air cooled by the primary heat exchanger 3, and passes through the gaps of the bulk grain 1, thereby storing the grain during storage. The heat and humidity generated by the growth of the grain 1 are removed.

The air <br/> pressure for cooling air to pass through the layer of grains 1, the air intake piping 16 and the primary heat exchanger 3 from the reservoir 2
Obtained by the blower 5 installed between the circulating air intake Re pipe 17 leading to.

The cooling air (circulating air ) in the primary heat exchanger 3
The cooling of the gas), in this example, through intake Re pipe 10 interposed the flow control valve 9, for example, LN as cold source
A low-temperature liquefied gas such as G is taken in, vaporized by the primary heat exchanger 3, and returned by the return pipe 11.

The circulating air taken into the primary heat exchanger 3 through the circulating air intake Re pipe 17 is cooled by evaporation heat of the cold source, through the switching valve 6 from the cooling air generating pipe 12, intake Through the pipe 13 and the secondary heat exchanger 4
, And pre-cool the grains, and then directly cool the cooling air
It is circulated to savings tank 2 through.

After the grain has been pre-cooled, the switching valve 6
Is switched to the bypass pipe 14 side, and the secondary heat exchanger 4
Without being connected to the cooling air supply pipe 15 .

As the cold heat source, a coolant such as Freon or brine may be used.

Further, the temperature sensor 7 installed at the outlet of the grain layer of the circulating air in this example, and feeds back the information to the control unit 8, the flow control valve 9 to control the flow rate of the cold source, savings tank 2 It shall control the temperature of the stored grains in the house. Alternatively, the temperature sensor may be located in the bulk grain layer.

FIG. 2 shows another embodiment in which circulating air is sucked from the upper portion of a storage tank 2 such as a silo. The layer of cereal 1 deposited in bulk as shown in FIG. 1 is up to several 10 m, to the gap between the grains 1 circulating air passes require considerable <br/> pressure. Therefore, by mixing ventilation sphere 30 that puncture holes many holes 33 smaller than the grain particles in the empty steel ball in as shown in FIG. 5 in stored grains 1, increase the transmission efficiency of the cooling air. FIG. 5 shows the details of the ventilation bulb 30.

FIG. 3 shows another embodiment of the present invention , in which a cooling pipe 3 is provided inside a storage tank 2 such as a silo as a cooling air passage in order to reduce the passing air resistance.
1 is provided. By a number of cooling pipes 31 provided in savings tank 2 passes through the cooling air, the surrounding grain is cooled, successively, Yuku to cool the stored grains 1.

[0026] As FIG still another embodiment 4, the cooling pipe 3, is an example where a porous cooling pipe 32 that many puncture holes with small pores 33 than grain. FIG.
An example of the multi-hole cooling pipe 32 is shown in FIG. The tip of the perforated cooling pipe 32 Yes closed, cooling air ejected from the air holes 33, reducing the passage resistance at the same time through the air gap of stored grains 1 directly enhance the cooling effect of the grain <br/> product .

[0027] In the case a layer of storage cereal is shallow, without passing through the direct grain layer is cooling air, the temperature of the grain in ventilated only by the cooling air savings tank can kept constant.

Although all of the above are cooling air suction systems,
The compressed air is cooled, press-feeding the savings tank 2 is also possible.

Further, all of the above-mentioned devices are of the cooling air circulation type, but after storage grain cooling, air can be released to the atmosphere.

[0030]

According to the present invention, the grain stored in a storage tank such as a silo grows due to the heat generated for growth, and the quality is reduced. Conventionally, grain stored in a storage tank such as a silo was periodically taken out, cooled, dehumidified, and stored again in a storage tank such as a silo. , this to prevent dehumidify, unloading, wear of cereals caused for carrying, damage, deterioration in quality due to deterioration
Can be .

In the apparatus of the present invention, cooling air is circulated.
Cooling equipment other than ventilation pipes and pipes for grain
Since it can be installed outside the tank, the structure of the storage tank
It can be simplified and is suitable for large storage tanks.

Further, it is cooled by a primary heat exchanger and used for ventilation.
Cooling air circulating in the piping of
Pre-cools the grain at the time of introduction and carries the temperature sensor
Feedback information to control the cold source and the same ventilation
Temperature and humidity of the grain in the storage tank with cooling air
Cooling efficiency and cooling efficiency.
It is also economical.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration in an embodiment of the present invention.

FIG. 2 is a diagram showing a basic configuration according to another embodiment of the present invention.
It is.

FIG. 3 shows a basic configuration of still another embodiment of the present invention .
FIG.

FIG. 4 shows a basic configuration of still another embodiment of the present invention .
FIG.

FIG. 5 is a detailed view of a vent used in the embodiment of FIG. 2;

FIG. 6 is a partial detailed view of a perforated cooling pipe used in the embodiment of FIG.

[Explanation of symbols]

1 ... cereal, 2 ... savings tank, 3 ... primary heat exchanger, 4 ... secondary heat exchanger, 5 ... blower, 6 ... switching valve, 7 ... temperature sensor, 8 ... controller 9 ... flow control valve, 10 ... cold heat source intake <br/> Re pipe, 11 ... cold source return pipe, 12 ... cooling air generating pipe, 13 ... intake Re pipe, 14 ... bypass pipe, 15 ... cold <br/>却空gas infeed pipe , 16 ... air intake pipe, 17 ... circulating air intake pipe, 20 ... grain pipe , 21 ... grain pipe , 3
0 ... Ventilation bulb, 31 ... Cooling pipe, 32 ... Porous cooling pipe, 33 ... Hole

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeaki Sakaguchi 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Koichiro Kanai 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Yasufumi Iseki 1-2-7 Motomoto Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (56) References JP-A-52-122535 (JP, A) JP-A-57- 122713 (JP, A) Actually open 55-80292 (JP, U)

Claims (2)

(57) [Claims] 1. A storage tank for storing grain, and a storage tank for storing the grain.
Primary and secondary heat exchangers installed outside and
The cooling air circulation path by connecting the lower with the ventilation pipe
And circulate through the ventilation pipe with the primary heat exchanger.
Heat exchange between the cooling air and the external cooling source
And cooled by the primary heat exchanger in the secondary heat exchanger
Heat exchange between the cooling air and the grains carried into the storage tank
And the secondary heat exchanger
Cooled grain is transported into the storage tank through the grain delivery pipe
And stored in bulk, cooled by the primary heat exchanger
Guiding the cooling air, the storage tank in the pipe for the blower and the air was
Can, distribution Rutotomoni, the storage tank or in a pipe for venting is passed through <br/> the layer of grains being stored in bulk state
The information of the placed temperature sensor is fed back to the primary heat exchanger and the secondary heat exchanger to control the cold heat source ,
A grain storage device characterized in that the temperature and humidity of the grains in the inside are kept constant . 2. The grain stored in bulk
In the layer, the hollow Grain particles smaller number of holes in the steel ball
Grain storage of puncture holes are ventilation spheres claim 1, wherein you have incoming mixed
Equipment .