JP2003274749A - Low-temperature storage facilities - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To preserve grain in a fresh state while significantly reducing an electric power cost by storing cold at a cold district in winter and radiating the cold. <P>SOLUTION: The low-temperature storage facilities are equipped with a pair of front and rear outer walls 4 provided with a plurality of opening parts for doorways in a line, a large number of outer shell bodies 5 which are installed between both the outer walls 4 and composed of arch-like structures connected to each of the opening parts, ice manufacture water tanks 24 arranged under the bottoms of floor slabs 21 on which the outer shell bodies 5 are placed, sealing storage tanks 6 of opening and closing type which are concentrically inside the outer shell bodies 5 in the length direction of the outer shell bodies and provided with transportation routes 28 at the centers, covering soil 7 for covering each of the outer shell bodies between the outer walls 4, accumulated or removed snow 8 piled and arranged on the covering soil 7 and a large number of air ducts 26 for freezing the covering soil, which are embedded and piped in the covering soil 7 and introduce open air. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low temperature storage facility suitable for storing a large amount of stored materials such as grains.

[0002]

2. Description of the Related Art For example, for government-stored rice, a low-temperature storage warehouse kept at 15 ° C. is used. An electric refrigerator is generally used as the method for maintaining the temperature, but the maintenance cost such as the electricity bill is high. Instead of this, storage warehouses that use snow in cold regions as a cold heat source have recently been proposed.In this case, however, organic heat insulating materials are used to store heat in the cold heat source throughout the year. There is a problem in terms of means and temperature control. Especially in a small-scale facility, the heat capacity becomes insufficient, and even in a cold region, the cold heat source may be consumed up depending on the temperature in summer.

For example, the Hokkaido Agricultural Experiment Station, as shown in the following table, compared the characteristics of rice stored for 12 months for each temperature range and announced the result.

Table Normal temperature 15 degrees C 5 degrees C 1. TZ value indicating the activity of embryo of brown rice 60% 66.8% 90% 2. Fatty acid concentration (mg / 100g) as an indicator of old rice odor 18 15 13 3. Rice cooking characteristic value (H / -H storage start 3.49) 4.3 4 3.8 4. Taste sensory test (deliciousness) -0.8 -0.4 0 5. Taste sensory test (odor) -0.7 -0.3 0 From the results shown in this table, by storing rice at a storage temperature of 0 to 5 ° C, it is possible to stockpile rice without deteriorating various characteristics including taste. Become. By the way, in fact,
For practical and economical reasons, temperature is 10 to 15 degrees C, humidity is 70.
-80%, and it is stipulated that this condition be kept for about 6 months, mainly in high temperature summer.

By the way, in recent years, in order to cope with an emergency or fluctuations in agricultural production, the importance of international stockpiling has been questioned, and a large-scale long-term stockpiling plan for rice, wheat, etc. has emerged. According to this concept, it is required to stockpile grains for about five years, and one of the prerequisites is an emergency. Therefore, it is necessary to use a private power generation system for all power for management. .

[0006]

However, according to the above table, the current preservation method is not suitable for preservation for 5 years. On the other hand, in order to prevent the taste and oxidation of grains for five years and maintain a large amount of grains at 0 to 5 degrees C while maintaining plant activity, a huge amount is needed even in cold regions. Since it requires a cold heat source, the electric refrigeration system must be relied upon, resulting in enormous maintenance costs such as electric power costs.

The present invention is intended to solve the above problems, and an object thereof is to store cold heat in a cold region in winter and radiate the cold heat in summer, thereby significantly reducing the electric power cost. It is intended to provide a low temperature storage facility suitable for large-scale stockpiling so that grains can be stored in a fresh state.

[0008]

In order to achieve the above object, the present invention provides an outer shell body made of an arched metal structure and an ice making machine installed on the lower surface of a floor slab on which the outer shell body is arranged. A water tank, a sealed storage tank arranged concentrically along the longitudinal direction inside the outer shell, a cover soil for covering the outer shell, and a pipe buried in the cover soil to introduce outside air. It is characterized in that it is provided with a large number of blower pipes for freezing the covered soil. Therefore, according to the present invention, the inside of the tank can be kept at a low temperature by the latent heat of the ice produced by the cold air in winter or the cover soil made by frozen soil in summer. In particular, by using covering soil as the heat insulating layer, the organic heat insulating material is not required, which is environmentally suitable.

Further, since the outer shell body is a half-divided body of a corrugated tube, it can be constructed at a low cost, and it can sufficiently resist the earth pressure covering the upper part thereof and has a high heat transfer efficiency. Will be things.

Further, in the storage tank of the present invention, the storage tank connects a roof portion having an arch-shaped section, a central partition having a substantially rectangular cross section, and a bottom side of the central partition and a bottom side of the roof section. In addition, the left and right bottom plates inclined toward the central bulkhead in a curved cross-section are provided, and the inside of the central bulkhead is used as a transport vehicle passage, so that the stored goods transport vehicle can be loaded into and out of the aisle. You can

Further, the ceiling of the central partition in the storage tank of the present invention is used as an inlet for the stored material, and a lower portion of the side wall of the central partition is used as an outlet. After the stored material is filled, the interior is filled with an inert gas. By sealing in the state, it is possible to rationalize the loading and unloading work, and
In the storage state, the inert gas prevents oxidation of the stored material,
It is possible to prevent the activity from decreasing.

The storage tank is a storage tank in which a plurality of storage tanks are arranged inside the outer shell at a predetermined interval in the longitudinal direction, and the tanks are adjacent to each other in the longitudinal direction of the tank. In between, and by disposing a plurality of axial fans for the introduction of outside air in the space formed between the outer shell and the tank, it is possible to introduce cold air in the cold season, It is suitable for ensuring a cold state.

In the present invention, the running cost is reduced by disposing the private electric power generation equipment in the vicinity as the fan motor for introducing the outside air into the blower pipe, the drive power of the axial fan and the control power for temperature management. Besides,
It can fully respond to emergencies.

[0014]

Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Figure 1,
2 shows the whole of the large-scale low temperature storage facility according to the present invention. The storage facility according to this embodiment is constructed in a cold region, and has, for example, a frontage width of about 800 m and a depth of about 2
A stockpiling storage box 1 that occupies a site area of 00m, and a private power generation facility 3 that is built on the site that separates the main road 2 for transportation and that supplies driving power to the storage box 1 and that controls ventilation, etc. It consists of

The stockpiling storage 1 is arranged with one surface facing the main road 2 and has a pair of outer walls 4 in which a large number of entrances and exits are arranged in a row.
And an outer shell 5 made of a half-divided body of metal corrugated tubes arranged in a row between the outer walls 4 and concentrically provided along the inside of each outer shell 5 and separated by a predetermined distance and arranged linearly 3 It is composed of two storage tanks 6, a cover soil 7 covered with an upper portion of the outer shell 5, and snow removal 8 further stacked on the upper portion of the cover soil 7. For example, per one outer shell body 5 500
0 tons, about 250,000 tons of seed paddy can be stocked.

The corrugated tube is used as the outer shell 5 because the material itself can be supplied at a low cost, and the earth pressure,
In addition to being arcuate enough to withstand snow pressure,
This is because the heat transfer area for cold heat can be increased.

Further, since the soil cover 7 and the snow removal 8 themselves function as a heat insulating material and have a sufficient capacity, the outer shell 5 and its inside can be cooled and stored by utilizing latent heat of fusion in the summer. In particular, since the snow removal 8 only needs to carry in the snow accumulated on the site during the winter season, as well as the snow generated in the neighboring areas due to shoveling, etc.
These can be effectively used.

The private power generation facility 3 includes a wind power generation facility zone 10 in which a plurality of wind power generators 9 are arranged and a lead-in road 11.
It is composed of various power generation facilities constructed adjacent to the zone 10 through the installation zone 14 and the installation zone 14 of the management building 12.

As various power generation facilities, there are a temperature difference power generation facility 15 utilizing a heat drop, a biomass power generation facility 16, a fuel cell facility 17, a solar power generation facility 18 utilizing solar heat, and the like. By compensating for the weaknesses of each facility by stabilizing or collecting the power generated by 9 and various power generation facilities, and obtaining stable power throughout the year and using this power The cold air ventilation in the storage 1 and the temperature control are performed.

FIG. 3 is a front and side sectional view of the storage 1.
FIG. 4 is a front sectional view showing an enlarged main part. In the figure, each outer shell 5 is installed on both sides on a foundation 20 standing on a concrete foundation 19. Further, a floor slab 21 is installed on the base 20, and joists 22 support the floor slab 21.

The outer wall 4 disposed before and after each outer shell 5 is covered with the soil 7 up to the vicinity of the top thereof, and a drainage groove 23 is formed between the surface of the soil 7 and the outer wall 4, and the upper portion of the soil 7 is covered. The snow-removing snow 8 melted in (3) is drained through the drain groove 23.

A plurality of openings in each outer wall 4 (see FIG. 1)
And the heat insulation door which opens and closes this is provided for each outer shell body 5.

The concave portion formed under the floor of each outer shell 5 is an ice making water tank 24, and the inside thereof is cooled by the latent heat of melting of the ice 25 stored in this water tank 24 in summer.
In addition, a large number of air ducts 26 are embedded in the frozen soil 7 covering the upper portion of the outer shell 5, and in the winter, the cover soil 7 is frozen by ventilating the outside air into each air duct 26 by a fan (not shown). At the same time, the cycle of re-freezing the ice 25 is repeated.

The two paddy storage tanks 6 arranged inside the outer shell 5 are of a closed storage type in which a stainless plate is bent.
A hermetically sealed structure including an arch-shaped roof portion 6a, a central partition wall 6b formed in a substantially rectangular cross section, left and right bottom plates 6c connecting the bottom side of the central partition wall 6b and the bottom side of the roof portion 6a, and front and rear mirror plates, The paddy 27 is stocked in the inside surrounded by these, and the inside of the central partition wall 6b is used as a carrier passage 28.

Then, the left and right bottom plates 6c are inclined in a curved shape toward the central partition wall 6b, and the paddy 27 put inside is accumulated toward the central partition wall 6b side by its own weight.

Further, curved injection guides 6d are provided on the left and right sides of the inside of the tank 6, and these serve as cooling fins. Further, although not shown, a sealed opening / closing type inlet is provided in the ceiling portion of the central partition wall 6b, and a sealing opening / closing type inlet port is also provided in the lower portion of the side wall of the central partition wall 6b.

The carrier passage 28 is used for the carrier 2 for loading and unloading paddy.
9 is a passage through which the vehicle can travel, and when carrying in, the outer wall 4
The vehicle 29 that has turned to the right or left of the main road 2 through the opening is passed through the opening formed in the outer wall, and can travel in the passage 28.

Then, the vehicle is stopped at the inlet position, the loading platform and the inlet are connected by the suction device 30, and the device 30 is driven to
The paddy is sucked, divided into left and right in the tank 6, and stacked in bulk, and sequentially accumulated from the lower inside of the side wall of the central partition wall 26b.

After the tank 6 is filled with paddy 27,
If an inert gas such as nitrogen gas is supplied to the inside and the charging port is sealed, it becomes a stockpiling state. Further, when carrying out, the paddy 27 can be taken out by opening the taking-out port at the lower part of the side wall.

Between the front and rear outer walls 3 and the tank 6 and between the tanks 6, there are a plurality of axial flows in the space formed inside the outer shell 5 and outside the tank 6. A fan 31 is arranged. As shown in a partially enlarged view, the axial fan 31 includes a motor 31b and a propeller 31c rotatably driven by the motor 31b inside a tubular duct 31a. The axial fan 31 located at position 21 penetrates the outer wall 3 and communicates with the outside.

These axial fans 31 are driven all at once during the cold season, thereby forcibly ventilating the outside air while accelerating the outside air from the one outer wall 21 side toward the other outer wall side, and the internal air without relying on the refrigerant or the like. To cool efficiently.

As described above, the electric power of the power generation equipment 3 is exclusively used for the rotational drive of the motor for ventilation in the cold season and for controlling the drive of these by temperature, so that the electric power of the electric power generation equipment 3 is higher than that in the case of using a refrigeration facility. Electric power can be reduced by about 95%, and maintenance costs can be made extremely low.

As the above temperature control method, it suffices to meet the conditions for storing paddy for about 5 years, and the storage temperature is 5 ° C.
Hereinafter, the humidity may be controlled to 70% or less.

In order to prevent oxidation, the paddy 27 may be filled in the tank 6 as described above, and then the tank 6 may be sealed after enclosing an inert gas such as nitrogen gas.

Since the fan motor for blowing the axial fan 31 and the ventilation pipe 26 is used only in the severe winter season, surplus power due to the suspension of use of these is sold to a power company,
It can be effectively used as driving power for other incidental facilities.

[0036]

As is apparent from the above description, according to the low temperature storage facility of the present invention, the cold heat of the cold region in winter is stored and the heat is dissipated in the summer, thereby significantly reducing the power cost. At the same time, since the grain can be stored in a fresh state, it is suitable as a large-scale storage facility.

[Brief description of drawings]

FIG. 1 is an overhead view showing the overall configuration of a low temperature storage facility according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a front sectional view and a side sectional view of a low temperature storage in the same facility.

FIG. 4 is an enlarged front sectional view showing a portion.

[Explanation of symbols]

1 low temperature storage 3 Private power generation equipment 4 outer wall 5 outer shell (corrugated pipe) 6 closed storage tanks 6a roof part 6b Central partition 6c bottom plate 7 soil cover 8 Snow removal 21 floorboard 24 ice making tank 25 ice 26 Blower pipe for freezing soil 27 Rice (cereals) 28 carrier passage 29 transport vehicles 31 Axial fan

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) E04H 5/10 F24F 5/00 102Z E21D 13/00 F25C 1/00 D F24F 5/00 102 F25D 16/00 F25C 1/00 E02D 29/04 A F25D 16/00 (72) Inventor Toshio Ichikawa 2-15-2 Konan, Minato-ku, Tokyo Obayashi Corporation Tokyo Head Office F-term (reference) 2B100 AA02 BA09 BB05 BD12 CA07 2D047 AB02 3L045 AA01 BA01 CA02 EA01 PA04 3L054 BH02

Claims (6)

[Claims] 1. An outer shell body made of an arch-shaped metal structure, an ice making water tank installed on a lower surface of a floor slab on which the outer shell body is arranged, and inside the outer shell body along a longitudinal direction thereof. And a concentrically-arranged hermetically-sealed storage tank, a cover soil for covering the outer shell, and a large number of blower pipes for freezing the cover soil that are buried in the cover soil to introduce outside air. Characteristic low temperature storage facility. 2. The low temperature storage facility according to claim 1, wherein the outer shell is a half-divided body of a corrugated tube. 3. The storage tank connects a roof portion having an arch-shaped cross section, a central partition wall having a substantially rectangular cross section, a bottom side of the central partition wall and a bottom side of the roof portion, and is curved toward the central partition wall. The low temperature storage facility according to claim 1 or 2, further comprising: left and right bottom plates inclined in a cross section, wherein an inner side of the central partition wall serves as a carrier passage. 4. The ceiling of the central partition in the storage tank serves as an inlet for the stored material, and the lower portion of the side wall of the central partition serves as an outlet, and after filling the stored material, the interior is filled with an inert gas and sealed. It is what stops, Claim 1 characterized by the above-mentioned.
Low temperature storage facility according to any one of 3 to 3. 5. A plurality of the storage tanks are arranged inside the outer shell body at predetermined intervals in the longitudinal direction, and the storage tank is provided between the tanks adjacent to each other in the longitudinal direction of the tank. The cold storage facility according to any one of claims 1 to 4, wherein a plurality of axial flow fans for introducing outside air are arranged in a space formed between the outer shell and the tank. 6. A private electric power generation facility is provided in the vicinity as a fan motor for introducing the outside air to the blower pipe, drive power for an axial fan, and control power for temperature management. Low temperature storage facility according to any one of 5.