JPH0868231A - Structure for storing water insoluble material or water slightly soluble material and method of storing the material - Google Patents

Abstract

PURPOSE: To make it possible to store a material inside an envelop in an airtight state, and what is more, to store the material under the application of a pressure load by filling water in a cavity formed underground and inserting an envelop made of a porous film member and storing a water insoluble material or a water slightly soluble material in the envelop by way of a transfer pipeline against water pressure. CONSTITUTION: A cavity 2 is formed at a specified depth of a ground 1. While holding a specified water level in a shaft 3 installed to allow the cavity 2 to communicate with the ground surface, filling water 10 is filled in the cavity 2. An envelop made of a porous film member is installed into the cavity 2. A storage material 7, which comprises a nonwater soluble material or a water insoluble material is fed into the envelope by way of a delivery pipeline 6 from the ground and stored inside the envelope 5 while it is expanding the envelope 5 against the water pressure by the filing water 10. The material 7 is stored in airtight inside the envelope 5 with a water film formed by a surface tension of the filling water 10 prevailing in each fine hole of the porous film member which constitutes the envelop 5. The material 7 is stored in the cavity 2 under the application of a specific pressure load produced by a static pressure of the filling water 10 in the cavity 2 determined by the water level in the shaft 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage structure for non-water-soluble substances or sparingly water-soluble substances such as LPG, petroleum, and various other gases, and a storage method for these substances, and particularly The present invention relates to a storage structure for a water-insoluble substance or a poorly water-soluble substance using the formed cavity and a storage method for these substances.

[0002]

2. Description of the Related Art Generally, as a storage tank for storing oil, gas and other energy resources, a storage tank made of iron or other metal material is known. These storage tanks secure the safety by utilizing the liquid-tightness and airtightness of the metal itself, and are installed on the ground or in the ground.

On the other hand, in recent years, the importance of energy resources has come to be particularly emphasized. Therefore, the development of a large-capacity storage tank is desired, and in the case of a storage tank made of a metal material, a large-capacity storage tank is required. Since it is difficult to construct economically, a large-capacity rock tank using rock cavities formed in the ground has been implemented as an alternative to the conventional metal storage tank.

Such a bedrock tank forms an underground cavity in the bedrock below the groundwater level, and the liquid-tightness and airtightness necessary for the safety of the tank are applied to the outer circumference of the tank through minute cracks in the bedrock. It is held by the so-called "water-sealing principle", in which the stored material is contained by the water pressure. This water-sealed bedrock tank can store large-capacity energy resources, is safe from fires on the ground, and maximizes the natural scenery and environment. In addition, there are advantages that the land can be utilized three-dimensionally according to the usage condition of the surface of the earth, the surface equipment can be kept to the minimum, and the labor of the maintenance can be saved.

[0005]

However, while the above water-sealed rock tank has the above-mentioned advantages,
It is difficult to secure the groundwater level in the bedrock to obtain liquid-tightness and air-tightness, and it is difficult to accurately grasp the state of the rock bed's cracks and water permeability. If the water permeability is high, the amount of spring water in the tank will increase and the burden of wastewater treatment will increase, and the groundwater level will drop, making it impossible to obtain the desired liquid-tightness and air-tightness. There is a problem that there is. Further, in such a case, a method of pouring cement grout or the like into the cracks in the bedrock to adjust the water permeability of the bedrock by clogging the cracks is proposed, but the effect of improving the water permeability by the grout is accurately proposed. There is a problem in that it is difficult to grasp, and a great amount of money is required for such grout work. Furthermore, for example, during excavation of a rock tunnel as a rock tank, once the rock becomes unsaturated due to a decrease in groundwater level and groundwater flowing out from cracks, etc. Since it is difficult, construction of a rock tunnel has a problem that it is necessary to carefully manage the situation of spring water from the rock.

Therefore, the present invention has been made in order to solve such a conventional problem, and has a storage structure for storing a water-insoluble substance or a poorly water-soluble substance as an energy resource in a cavity formed in the ground. And the storage method, whether or not the ground around the cavity is rock, and even if it is rock, regardless of the condition of cracks in the rock or the saturation of groundwater in the cracks, a simple configuration To secure the liquid-tightness and air-tightness necessary to store the storage substance,
An object of the present invention is to provide a storage structure of a water-insoluble substance or a sparingly water-soluble substance capable of easily and safely storing a water-insoluble substance or a sparingly water-soluble substance in an underground cavity, and a storage method for these substances. It is a thing.

[0007]

The present invention has been made in order to achieve the above object, and its gist is to provide a cavity formed in the ground, filling water filled in the cavity, and The bag body is formed by inserting the bag body made of a perforated membrane member inserted into the cavity into the bag body through a transportation pipe installed so as to communicate with the inside of the bag body. A storage structure for a water-insoluble substance or a water-insoluble substance, characterized by comprising a water-insoluble substance or a water-insoluble substance which is stored in the bag body by being pushed and spread against the water pressure of the filling water.

Here, as the cavity in the present invention, various cavities such as tunnels, vertical holes and other underground cavities newly excavated for the storage structure, abandoned mines and naturally formed cavities are used. can do.

As the filling water to be filled in the cavity, tap water, lake water, river water, etc., as well as ground water, etc. can be used as they are, and these water can be used as grout or the like. It is also possible to use a mixture of which the specific gravity is adjusted. That is, natural water can be used in addition to artificially added water.

Further, the bag body made of the porous membrane member in the above description has a large number of fine pores capable of forming a water film by the surface tension of water when contacting with water, for example, cloth, woven fabric, sponge. It refers to a bag body formed by using a film member made of, for example,

Another feature of the present invention is to connect the ground through a vertical shaft and fill the inside of a cavity formed in the ground with filling water and insert and install a bag body made of a porous membrane member. , A transportation pipe that connects the ground and the inside of the bag body through the shaft is provided, and a storage substance made of a water-insoluble substance or a poorly water-soluble substance is fed into the bag body through the transportation pipe. By expanding the bag body against the water pressure of the filling water by the above, the storage material is stored airtight in the bag body in a state in which the water pressure of the filling water from the outer periphery of the bag body is loaded. The method of storing a water-insoluble substance or a poorly water-soluble substance.

In the above description, the vertical shaft means a shaft that connects the ground and the cavity, and includes not only so-called vertical shafts formed in the vertical direction but also inclined shafts.

[0013]

According to the storage structure of the water-insoluble substance or the slightly water-soluble substance of the present invention, the water-insoluble substance or the slightly water-soluble substance stored in the bag body by expanding the bag body against water pressure is , Out of the bag due to the water film formed by the surface tension in each micropore of the porous membrane member constituting the bag and the water pressure due to the filling water, and due to its water-insoluble or slightly water-soluble physical property Without being carried out, the bag is held in an airtight state inside, and is stored in the cavity under a predetermined pressure by the hydrostatic pressure from the filling water filled in the cavity. Also, the desired pressure to load the storage material can be easily managed by adjusting the fill water level above the cavity, regardless of natural or surrounding ground water level.

According to the method for storing a water-insoluble substance or a poorly water-soluble substance of the present invention, after a cavity is formed at a predetermined depth in the ground, a predetermined pressure is applied by the work from the ground. The stored material can easily be stored in the underground cavity in the stored state.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A storage structure for a water-insoluble substance or a poorly water-soluble substance and a storage method for these substances according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows the overall structure of a storage structure 30 according to an embodiment of the present invention.
That is, the storage structure 30 of this embodiment maintains a predetermined water level in the cavity 2 formed at a predetermined depth of the ground 1 and the vertical shaft 3 provided to connect the cavity 2 and the ground, Filling water 10 to be filled in the cavity 2, a bag body 5 made of a porous membrane member inserted and installed in the cavity 2, and a receiving pipe as a transportation pipe for communicating the inside of the bag body 5 with the ground. The storage material 7 is fed from the ground to the inside of the bag body 5 via 6.

Here, the ground 1 on which the storage structure 30 is installed
It is desirable that the ground is stable and has a low hydraulic conductivity such as rock, but the shape of the formed cavity 2 can be retained, the hydraulic conductivity is small, and the filling water 10 is in the shaft 3 etc. Since it is easy to keep the water level at a constant level in the soil, if the soil can easily maintain the predetermined pressure applied to the bag 1 by the filling water, the soil 1 such as clay layer or silt layer can be used. Can also be installed.

The cavity 2 forming the storage structure 30 is
In addition to the cavity 2 newly excavated and formed by using various existing tunnel excavation methods and vertical hole excavation methods, for example, an abandoned mine used for ore mining or a natural cavity can be used as it is.

The filling water 10 filled in the cavity 2
As the water, tap water, lake water, river water, sea water, sewage-treated water, etc. can be used, and those in which an additive such as grout or bentonite is mixed to adjust the specific gravity can also be used. Even if the filling water 10 in the cavity 2 flows out to the surrounding soil 1 due to the water permeability of the soil 1, the filling water 10 is replenished in the vertical shaft 3 to easily maintain the water level at a predetermined height. You can keep it.

Further, the bag body 5 constituting the storage structure 30 is
A porous membrane member, that is, a membrane member having a large number of minute holes that can form a water film due to the surface tension of water such as cloth, woven fabric, sponge, etc. when it comes into contact with it In addition, in the state where the storage substance 7 is fed inside and pushed out, it has substantially the same shape and size as the cavity 2. Further, at the upper end of the bag body 5, a receiving and paying pipe 6 which is vertically arranged in the vertical shaft 3 and communicates with the ground is attached, through which a storage substance 7 described later is fed into the bag body 5. It

The storage material 7 stored in the bag body 5, that is, the inside of the cavity 2, is made of, for example, LPG (liquefied petroleum gas), petroleum, or other various gases or liquids.
It is a substance that can serve as an energy resource and is insoluble or poorly soluble in water. Ie such storage material 7
Is fed from the ground to the bag body 5 through the receipt and payment pipe 6,
It is stored inside the bag body 5 while pushing and expanding the bag body 5 against the water pressure of the filling water 10. And such storage material 7
Is water-insoluble or sparingly water-soluble, so that the water film formed by the surface tension of the filling water 10 in each micropore of the porous membrane member forming the bag body 5 causes the outside of the bag body 5 to disappear. It is stored in an airtight state inside the bag body 5 without flowing out into the cavity 2 and is filled with a predetermined pressure by the hydrostatic pressure of the filling water in the cavity 2 which is determined by the water level in the vertical shaft 3.
Will be stored inside. In this embodiment, LPG having a specific gravity smaller than that of water is stored as the storage substance 7. As shown in FIG.
Liquid LPG 7b is stored in the central portion of the bag 5 of the PG 7a.

Further, in the storage structure 30 of this embodiment, a drainage pipe 8 which is open from the bottom of the bag body 5 to the ground through the vertical shaft 3 is vertically arranged, through which the drainage pipe 8 is provided at the bottom of the bag body 5. The inflow water 9 accumulated and discharged can be discharged to the ground. That is, the drainage pipe 8 has a perforated portion 8a at the lower end thereof which is immersed in the inflow water 9,
The inflow water 9 can be easily discharged to the ground by installing a pump inside.

In order to install the storage structure 30 of this embodiment in the ground, first, the filling water 10 is filled in the cavity 2 through the vertical shaft 3 formed by excavation to connect the cavity 2 to the ground. Further, the bag body 5 in the folded state is inserted and installed in the cavity 2 through the vertical shaft 3, and the receiving and paying pipe 6 provided at the upper end of the bag body 5 is installed and fixed in the vertical shaft 3. In addition, in the case of the ground in which the cavity 2 and the vertical shaft 3 can be formed in a dry state, the filling water 1 is provided after the bag body 5 is installed in the cavity 2.
It is also possible to fill 0.

Then, while the water level of the filling water 10 in the vertical shaft 3 is maintained at a predetermined height, the stored substance 7 is pumped into the bag body 5 installed in the cavity 2 through the receiving and receiving pipe 6. The bag 5 is filled with filling water 10 by the stored substance 7 thus stored.
As a result, the storage substance 7 is airtightly stored inside the bag body 5 under a predetermined storage pressure of the filling water 10 from the outer periphery of the bag body 5 as a result of being pushed and spread out against the water pressure due to. become.

That is, after the underground cavity 2 and the shaft 3 are formed, it is possible to easily store the storage substance 7 in the underground cavity 2 under a predetermined pressure, mainly by working from the ground. You can

When necessary, the bag body 5 can be put in and taken out of the cavity 2 in a narrowed state, so that the cavity 2 and the bag body 5 can be easily maintained and repaired, and the surrounding ground 1 and The storage material 7 does not come into contact, so an open inspection can be performed if required.

Further, the storage substance 7 can be dispensed by using a dedicated pump or by injecting the filling water 10.

[0027]

As described in detail above, according to the storage structure for a water-insoluble substance or a poorly water-soluble substance of the present invention, the storage substance fed into the inside of the bag constitutes the bag. Due to the water film formed by the surface tension in each micropore of the porous membrane member, the water is formed in the cavity inside the bag body in a hermetically sealed state and under a predetermined pressure without flowing out of the bag body. Stored. That is, the liquid-tightness and air-tightness necessary for storing the storage substance can be ensured with a simple structure, and the water-insoluble substance or the slightly water-soluble substance can be stored easily and safely in the underground cavity.

Further, according to the method for storing a water-insoluble substance or a poorly water-soluble substance of the present invention, after a cavity is formed at a predetermined depth in the ground, a predetermined pressure is applied mainly by work from the ground. The stored material can easily be stored in the underground cavity in the stored state.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a storage structure for a water-insoluble substance or a poorly water-soluble substance of the present invention.

[Explanation of symbols]

 1 Ground 2 Cavity 3 Vertical Shaft 5 Bag 6 Receiving Pipe (Transportation Piping) 7 Storage Material 10 Filled Water 30 Storage Structure

Claims (2)

[Claims] 1. A bag formed of a cavity formed in the ground, filling water filled in the cavity, a porous membrane member inserted and installed in the cavity, and the inside of the bag. By being fed into the bag body via a transportation pipe installed in communication,
Storage of a water-insoluble substance or a sparingly water-soluble substance, characterized by comprising a water-insoluble substance or a sparingly water-soluble substance stored in the bag body by expanding the bag body against the hydraulic pressure of filling water. Construction. 2. A bag which is filled with filling water and is made of a porous membrane member is inserted and installed in a cavity formed in the ground by communicating with the ground through a vertical shaft, and the bag is connected to the ground through the vertical shaft. A transportation pipe that communicates with the inside of the bag is arranged, and a storage substance made of a water-insoluble substance or a poorly water-soluble substance is fed into the bag through the transportation pipe to fill the bag with water. A water-insoluble substance or a poorly water-soluble substance, which is characterized in that it is expanded against the water pressure of, and the storage substance is hermetically stored in the bag body under the pressure of water pressure due to the filling water from the outer periphery of the bag body. Method of storing volatile substances.