JPH0749650B2 - Circulating underground device that uses cooling and reducing liquid as resuscitation / snow melting geothermal liquid - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground device capable of exchanging and rejuvenating a snow-melting reducing liquid having a novel structure with a snow-melting geothermal liquid.

[0002]

2. Description of the Related Art Heretofore, in this type, the following has been done. Among the conventional snow melting road methods, there is a method of using groundwater that is relatively economical and has a good effect of snowmelt, and this method uses the sprinkling type snow melting method (spraying groundwater on the snow surface to remove the snow). There are two methods, a snow melting method and a non-slupping snow melting method (a method in which ground water is circulated in a pipe buried in the ground to melt snow).

[0003]

However, the conventional method of melting snow using groundwater has the following problems. 1. In both the sprinkling snow melting method and the non-sprinkling snow melting method, an aquifer capable of sucking groundwater must always exist in the underground geology of the site where snow melting and snow melting occur. 2. The sprinkling snow melting method requires a large amount of groundwater, so if snowmelting is performed, the groundwater level will drop, causing changes in the environment that cause depletion of groundwater and wasting valuable groundwater. .

3. Since the sprinkling system consumes a large amount of groundwater, it causes environmental destruction due to groundwater level drop and depletion of groundwater, which is a valuable underground resource, and a sewer or sewer system for treating used snowmelt water is required. 4. In the sprinkling type snow melting method in extremely cold areas, groundwater is sprayed on the snow-melting road surface so that it winds up and adheres to road traffic and freezes, and water spray particles drift on the road surface. It also causes a freezing phenomenon on the water surface. 5. In the sprinkling type snow melting method, depending on the quality of the sprinkled water, the pollution caused by the water quality of the snow-melting road surface becomes serious.

6. Depending on the quality of the groundwater used in the unsprinkled snow melting method, the snow melting pipe may become clogged with scale. 7. The currently practiced unsuccessful snowmelt method requires two wells, a groundwater pumping well and a return well, which are used at the time of construction.
It is considerably limited by costs. When the above problems are solved as a problem to be solved, an underground device for exchanging / reviving the snow-melting reducing liquid to the geothermal liquid is obtained.

The present application is an invention made in view of such problems of the prior art, and an object of the invention is to provide the following things. 1. This application uses the snow melting medium liquid used for the non-sprinkling snow melting road. 2. The snowmelt geothermal liquid, which is a snowmelt medium liquid, uses groundwater in the aquifer, which has underground snow and has a snowmelt temperature, as the snowmelt geothermal liquid.
By the snow melting operation of the snow melting geothermal liquid, the snow melting cooling reductant that radiates heat is reduced to the reducing layer. That is, the used snow melting cooling reductant, which is the snow melting medium liquid, is reduced to the reducing layer and exchanged with the snow melting geothermal liquid in the aquifer layer at the snow melting temperature in the lower part of the same geothermal collection casing. As a result, efficient continuous circulation and snowmelt operation can be performed by exchanging the snowmelt medium liquid.

3. Even if snowmelt geothermal water cannot be obtained from the underground aquifer, if the artificial aquifer formed along the outer wall of the geothermal collection casing is filtered during the flow of the snowmelt medium liquid, the stored geothermal heat must be preserved. , Geothermal heat is collected and becomes a snowmelt geothermal liquid. The snow-melting geothermal liquid becomes a snow-melting cooling reducing liquid due to the snow-melting operation, and what is reduced to the geothermal collection casing is revived by obtaining the geological geothermal heat described above to become a snow-melting geothermal liquid. By resuscitating the snowmelt medium liquid, continuous snowmelt operation can be continued. 4. In the present application, the used snowmelt cooling reductant is reduced to the reducing layer, or the used snowmelt cooling reductant is revived as a snowmelt geothermal liquid, and it is composed of a continuous circulation snowmelt mechanism. Although a well was necessary, a well of one well is often used in the present application, and at the same time, the cost for producing the well is low, and at the same time, the city sewage facility that processes the used snow melting cooling reductant becomes unnecessary.

[0008]

In order to achieve the above-mentioned object, the present invention is as follows. That is, the first aspect of the present invention is to plant a geothermal collection casing 2 composed of a cylindrical portion 2A, a ceiling plate 2B stretched and sealed at the upper and lower ends of the cylindrical portion, and a bottom plate 2C so as to reach a predetermined depth in the ground. The axial portion of the geothermal heat collection casing 2 has a cylindrical portion 3
A and a heat insulating casing 3 composed of a ceiling plate 3B which is stretched and sealed at the upper end of the cylindrical portion is drawn in from above, and a lower opening 3C of the heat insulating casing 3 is provided in a bottom plate 2C of the geothermal collection casing 2. At the lower end 4A of the snow melting geothermal liquid circulation pipe 4 opened in the vicinity and drawn into the heat insulating casing 3 from above, a pump 5 for pumping the revived snow melting geothermal liquid liquid 2 to the snow melting geothermal liquid circulation pipe 4 is provided. The tip 4B of the liquid circulation pipe 4 is a circulating underground device that uses the cooling and reducing liquid that penetrates the top plate 2B of the geothermal collection casing 2 and communicates with the upper part of the geothermal collection casing 2 as resuscitation / snow melting geothermal liquid.

According to the second aspect of the invention, the geothermal heat collecting casing 21 which is planted to reach a predetermined depth in the ground has a cylindrical portion 21A and a ceiling plate 21B stretched and sealed at the upper end of the cylindrical portion.
And a cylindrical portion 21A having a position corresponding to the reduction layer B in the snow melting cooling reducing liquid reducing strainer 21A.
1, a geothermal liquid collecting strainer 21A2 is provided at a position corresponding to the aquifer B, and the heat insulating casing 31 drawn into the axial center of the geothermal collecting casing 21 from above includes a cylindrical portion 31A and a cylindrical portion 31A. The heat insulating casing 3 is composed of a ceiling plate 31B that is stretched and sealed at the upper end of the portion.
The lower opening 31C of 1 is opened near the bottom of the geothermal collection casing 21, and the pump 51 is attached to the lower end 41A of the snow melting geothermal liquid circulation pipe 41 drawn into the heat insulating casing 31 from above. 41 of 41
B penetrates the top plate 21B of the geothermal collection casing 21 and communicates with the upper part of the geothermal collection casing 21, and a separating packer 61 for the reducing liquid and the geothermal liquid is stretched between the geothermal collection casing 21 and the heat insulating casing 31. This is a circulating underground device that uses the cooling reduction liquid that is used as a resuscitation / snow melting geothermal liquid.

Further, in the third aspect of the present invention, the geothermal heat collecting casing 22 which is planted to reach a predetermined depth in the ground has a cylindrical portion 22A and a ceiling plate 22 which is stretched and sealed at the upper end of the cylindrical portion.
And a cylindrical portion 22A having a position corresponding to the reduction layer B in the snow melting cooling reducing liquid reducing strainer 22.
A1 is provided, a geothermal liquid collection strainer 22A2 is provided at a position corresponding to the aquifer B, and the heat insulating casing 32 drawn into the axial center of the geothermal collection casing 22 from above is a cylindrical portion 32A and this cylinder. It is composed of a ceiling plate 32B which is stretched and sealed at the upper end of the section, and a lower opening 32C of the heat insulating casing 32 is opened near the bottom of the geothermal collecting casing 22 and is drawn into the heat insulating casing 32 from above to melt the geothermal liquid circulation of snow. A pump 52 is attached to the lower end 42A of the pipe 42, and the tip 4 of the snow melting geothermal liquid circulation pipe 41 is attached.
2B penetrates the top plate 22B of the geothermal collection casing 22 and communicates with the upper part of the geothermal collection casing 22. Between the geothermal collection casing 22 and the heat insulating casing 32, a dividing packer 62 for reducing liquid and geothermal liquid is stretched. This is a circulating underground device that uses the cooling reduction liquid that is used as a resuscitation / snow melting geothermal liquid.

[0011]

EXAMPLES Examples will be described with reference to the drawings. Referring to FIG. 1, reference numeral 1 denotes a circulating underground device (hereinafter referred to as an underground device 1) that uses a cooling reducing liquid as a rejuvenating / snow melting geothermal liquid in a geothermal collection casing. This underground device 1 is applied in the case of the following unsuitable conditions. There is an aquifer in the underground geology of the snow melting facility,
Even if there is a snowmelt geothermal liquid that stays in the stratum, the water quality is not suitable as a snowmelt liquid medium for the water quality that separates the snowmelt geothermal liquid circulation pipe during the snowmelt operation and adheres to the inner wall of the pipe. . In addition, it is also unsuitable for a geological formation where the underground geological structure is severe and cannot be retained no matter how much the snow melting medium liquid is replenished.

Therefore, the structure of the underground device 1 is as follows. A geothermal collection casing 2 composed of a cylindrical portion 2A and a ceiling plate 2B and a bottom plate 2C that are stretched and sealed at the upper and lower ends of the cylindrical portion is planted in the ground to reach a predetermined depth. A heat insulating casing 3 composed of a cylindrical portion 3A and a ceiling plate 3B that is stretched and sealed at the upper end of the cylindrical portion is drawn into the core from above, and the lower opening 3C of the heat insulating casing 3 has a geothermal heat collecting portion. Casing 2
Of the snow melting geothermal liquid circulating pipe 4 that is opened near the bottom plate 2C and is drawn into the heat insulating casing 3 from above to the lower end 4A of the snow melting geothermal liquid circulating pipe 4 through the pump 5 to operate the snow melting geothermal liquid circulating pipe 4. To do. Further, the tip 4B of the snowmelt geothermal liquid circulation pipe 4 penetrates the top plate 2B of the geothermal collection casing 2 and communicates with the upper part of the geothermal collection casing 2.

Next, the working effects of the underground device 1 are as follows. The snowmelt medium liquid in the geothermal collection casing 2 is converted into the revived snowmelt geothermal liquid D by the geothermally preserved geothermal heat, and the pump 5 is operated to operate the snowmelt geothermal liquid circulation pipe 4 to perform the snowmelt operation and then to the geothermal collection casing 2. It is recirculated and further, while collecting geological geothermal heat from the outer wall of the geothermal heat collection casing 2, the snowmelt cooling / reducing liquid gradually changes to the revived snowmelt geothermal liquid D. That is, the revived snow melting geothermal liquid D at the bottom of the geothermal collection casing 2 is heated and sucked by the pump 5 to operate the heat insulating casing 3
From the lower opening 3C to the pump 5, the pumping force causes the snowmelt geothermal liquid circulation pipe 4 to become a snowmelt cooling reducing liquid, which is reduced to the geothermal collection casing 2. Further, the geothermal geothermal heat is conducted and collected from the outer wall of the geothermal heat collecting casing 2 while flowing down in the geothermal heat collecting casing 2, and is revived into the rejuvenating snowmelt geothermal liquid 2 before reaching the bottom of the geothermal heat collecting casing 2. The above process is repeated and the continuous snow melting operation is performed.

Referring to FIG. 2, reference numeral 11 denotes a circulating underground device (hereinafter referred to as an underground device 11) which uses the cooling reducing liquid of another embodiment as a rejuvenating / snow melting geothermal liquid.
This is to replace the snowmelt cooling reduction liquid with the snowmelt geothermal liquid liquid. This underground device 11 is suitable for using the groundwater in the aquifer as a snowmelt geothermal fluid unit when there is an aquifer in the underground geology of the snowmelt facility that can collect groundwater.

Therefore, the structure of the underground device 11 is as follows. Reference numeral 21 denotes a geothermal heat collection casing that is planted in the ground to reach a predetermined depth, and is composed of a cylindrical portion 21A and a ceiling plate 21B that is stretched and sealed at the upper end of the cylindrical portion. A snow melting cooling reducing liquid reducing strainer 21A1 is provided at a position corresponding to B, and a geothermal liquid collecting strainer 2 is provided at a position corresponding to the aquifer B.
1A2 is provided. In addition, G is an impermeable layer such as clay that cannot collect the snowmelt geothermal fluid unit (groundwater), which is located other than the reducing layer B and the aquifer B.

Reference numeral 31 denotes a heat insulating casing which is drawn into the axial center of the geothermal heat collecting casing 21 from above, and includes a cylindrical portion 31A and a ceiling plate 31B stretched and sealed at the upper end of the cylindrical portion.
And the lower opening 31 of the heat insulating casing 31.
C is opened near the bottom of the geothermal collection casing 21. A pump 51 is attached to the lower end 41A of the snowmelt geothermal liquid circulation pipe 41 drawn into the heat insulating casing 31 from above, and a tip 41B of the snowmelt geothermal liquid circulation pipe 41 penetrates the top plate 21B of the geothermal collection casing 21 to pass the geothermal heat. It communicates with the inside of the collection casing 21.

Reference numeral 61 is a dividing packer for stretching the reducing liquid and the geothermal liquid, which is stretched between the geothermal collecting casing 21 and the heat insulating casing 31. In the figure, 21C is a reducing chamber for the snowmelt cooling reducing liquid, and 21D is a receiving chamber for the snowmelt geothermal liquid.

The operation and effect of the underground device 11 are as follows. The groundwater in the aquifer B serves as snowmelt geothermal liquid, and the operation of the pump 51 causes the geothermal liquid collection strainer 21A2 to lower the opening 3 of the heat insulating casing 31 which is a heat non-conducting material.
The revived snow melting geothermal liquid D that has been sucked from 1C and pumped to the snow melting geothermal liquid circulation pipe 41 through the pump 51 performs snow melting operation on the snow-covered road surface to become the snow melting cooling reducing liquid and becomes the geothermal collection casing 21 and the heat insulating casing 31. Is refluxed during.
The recirculated snowmelt cooling reductant is not reduced in the geothermal collection casing 21 by the dividing packer 61 for the reductant and the geothermal liquid, and is reduced to the reducing layer B through the snowmelt cooling reductant reducing strainer 21A1. The above process is repeated and the continuous snow melting operation is performed.

Referring to FIG. 3, reference numeral 12 denotes a circulating underground device (hereinafter referred to as an underground device 12) which uses the cooling and reducing liquid of another embodiment as a rejuvenating / snow melting geothermal liquid, and melts snow in an artificial aquifer c. It is a device that revives the cooling reduction liquid into the rejuvenating snowmelt geothermal liquid. This underground device 12 is suitable for use under the following conditions. An underground device that regenerates the snowmelt cooling reductant into a resuscitating snowmelt geothermal fluid in the artificial aquifer c. The underground geological form of the snowmelting facility is composed of an impermeable layer such as clay that is a layer that cannot collect the resuscitating snowmelt geothermal fluid. In the case of geological features, when excavating the intubation hole of the geothermal collection casing 22, a drilling well construction with a large excavation diameter that can attach an artificial aquifer c along the outer wall of the geothermal collection casing is constructed, and after the geothermal collection casing is intubated, the geothermal An artificial aquifer is formed on the outer wall of the geothermal collection casing by pouring and burying gravel, which is the aquifer layer material, in the gap between the outer wall of the collection casing and the excavation diameter. After that, the whole snow melting facility is filled outside the artificial aquifer c where the snow melting medium liquid (mainly water) was created.

Therefore, the structure of the underground device 12 is as follows. Reference numeral 22 is a geothermal collection casing that is planted to reach a predetermined depth in the ground, and is composed of a cylindrical portion 22A and a ceiling plate 22B that is stretched and sealed at the upper end of the cylindrical portion. A snow melting cooling reducing liquid reducing strainer 22A1 is provided at a position corresponding to B, and a geothermal liquid collecting strainer 2 is provided at a position corresponding to the aquifer B.
2A2 is provided. In addition, G is an impermeable layer such as clay that cannot collect the resuscitated snowmelt geothermal fluid (groundwater) in the formations other than the reducing layer A and the aquifer B.

Reference numeral 32 denotes a heat insulating casing which is drawn into the axial center of the geothermal heat collecting casing 22 from above, and includes a cylindrical portion 32A and a ceiling plate 32B stretched and sealed at the upper end of the cylindrical portion.
And the lower opening 32 of the heat insulating casing 32.
C is opened near the bottom of the geothermal heat collection casing 22. A pump 52 is attached to a lower end 42A of the snow melting geothermal liquid circulation pipe 42 drawn into the heat insulating casing 32 from above, and a tip 42B of the snow melting geothermal liquid circulation pipe 42 penetrates the top plate 22B of the geothermal collection casing 22 to pass the geothermal heat. The collection casing 22 communicates with the upper side.

Reference numeral 62 denotes a packer for dividing the reducing liquid and the geothermal liquid, which is stretched between the geothermal collecting casing 22 and the heat insulating casing 32. In the figure, 22C is a reducing chamber for the snowmelt cooling reducing liquid, and 22D is a receiving chamber for the snowmelt geothermal liquid.

Next, the operation and effect of the underground device 12 are as follows. The artificial aquifer C is an underground device in the case of an impermeable layer without a snowmelt medium liquid, and the snowmelt medium liquid filled in the entire device transfers the geothermal geothermal heat while passing through the artificial aquifer C. Resurrection to the snow melting geothermal fluid during the stay.

By the operation of the pump 52, the snowmelt medium liquid in the artificial aquifer C is changed into the revived snowmelt geothermal liquid D, and the geothermal liquid collection strainer 22A2 provided at the bottom of the geothermal collection casing 22 causes the geothermal liquid collection casing. 22D, is pumped into the snow melting geothermal liquid circulation pipe 42 through the pump 52 in the heat insulating casing 32, and is subjected to snow melting operation to become the snow melting cooling reducing liquid, and the geothermal collection casing 2
2 and the heat insulating casing 32 are circulated.

The recirculated snowmelt cooling reductant does not flow down into the geothermal collection casing 22 by the packer 62 for separating the snowmelt cooling reductant and the revived snowmelt geothermal fluid D, and passes through the snowmelt cooling reductant reduction strainer 22A1. It is returned to the artificial aquifer c. That is, the artificial snow aquifer c passes through the snow melting cooling reductant reduction strainer 22A1 to reduce the snow melt cooling reductant and is revived while passing through the artificial aquifer c to revive to the snow melting geothermal fluid D → Pumping force of pump 52 -> Geothermal heat collection casing 2
2 → insulating casing 32 → pump 52, and by pumping force → snow melting geothermal liquid circulation pipe 42 for cooling snow melting → returning to geothermal collection casing 22 ... Separating packer 62 between the snow melting cooling reducing liquid and the revived snow melting geothermal liquid D It is blocked by and does not flow down the geothermal collection casing 22 ... It returns to the artificial aquifer c. The above process is repeated and the continuous snow melting operation is performed.

Referring to FIG. 4, the dividing packers 61 and 62 for the reducing liquid and the geothermal liquid are constructed as follows. That is, the dividing packers 61 and 62 are the snow melting cooling reducing liquid reducing strainers 21A1 and 22A1 and the geothermal liquid collecting strainer 21.
Geothermal heat collecting casing 2 at an appropriate position between A2 and 22A2
The reducing liquid and the geothermal liquid are installed in the gaps between the inner walls of 1, 22 and the outer walls of the heat insulating casings 31, 32 so as to divide the reducing liquid and the geothermal liquid, and the snow melting cooling reducing liquid is recirculated from the snow melting geothermal liquid circulation pipes 41, 42 to one side. , It is for avoiding the mixed flow of the snowmelt geothermal fluid and the revived snowmelt geothermal fluid in the aquifer with the snowmelt cooling reducing fluid with a large temperature difference. As shown in FIG. 4, the slanted ring is welded to the inner wall of the geothermal heat collecting casing to form the valve seats 61A and 62A of the split packer, while the heat insulating casing is installed as a snow melting underground device at the outer wall of the heat insulating casing. To form the valves 61B and 62B by welding a ring valve with a slope so as to be in close contact with the valve seats 61A and 62A.
The close packer 61, 62
Will be completed.

Note that 1. The geothermal heat collection casing is made of metal with good heat conductivity and is piped. 2. The heat-insulating casing is made of a material having poor heat conduction and is piped. 3. Reduction layer a is a layer that returns the snowmelt cooling reduction liquid to the ground. 4. The aquifer B is a layer that holds the snowmelt geothermal fluid (groundwater). 5. The artificial aquifer C is an aquifer artificially created along the outer wall of the geothermal collection casing. 6. The snowmelt geothermal fluid is groundwater in the aquifer, and the deeper the aquifer has a higher temperature. 7. The revived snowmelt geothermal fluid D becomes a higher geothermal fluid as the geothermal temperature of the outer wall of the geothermal collection casing becomes higher. 8. The pump is installed in the heat insulating casing and sucks the snowmelt geothermal liquid unit and sends it under pressure to the snowmelt geothermal liquid circulation pipes 41 and 42.

The present invention operates as follows. Depending on the subsurface geology of the desired location of snowmelt, the snowmelt cooling reduction liquids of Fig. 1, Fig. 2, and Fig. 3 will be replaced with snowmelt geothermal liquid units or resuscitated. . With reference to FIG. 1, the underground device 1 is a geothermal device in which the water quality in the aquifer B of the underground device that revives the snow-melting cooling reducing liquid into the snow-melting geothermal liquid is regenerated into the snow-melting geothermal liquid circulation device. In the case of geology that is not suitable or does not retain the snowmelt medium liquid, the geothermal heat of the underground geology is collected from the outer wall of the geothermal heat collection casing while the snowmelt medium liquid flows down in the geothermal heat collection casing by the suction and pumping force of the pump. , Revived snow melting geothermal fluid D becomes the snow melting cooling reduction liquid in the snow melting geothermal fluid circulation pipes 41 and 42, is reduced to the geothermal collection casing, and further collects geothermal heat to be revived in the revived snow melting geothermal fluid D. In this way, the snow melting medium liquid is revived in the geothermal collection casing.

With reference to FIG. 2, the underground device 2 collects the snowmelt geothermal liquid solution in the aquifer B, performs the snowmelt operation, and converts it into the snowmelt cooling reducing solution to the reducing layer I. Reduce to. In this way, the snowmelt geothermal liquid solution in the aquifer is exchanged with the snowmelt cooling reducing solution. With reference to FIG. 3, in the case of an impermeable layer such as a clay layer without an aquifer, the underground device 3 has an artificial aquifer layer c formed along the outer wall of the geothermal collection casing of the underground device. During the passage, the snow melting cooling reductant after the completion of the snow melting operation is pumped by the pumping force to collect the geothermal heat of the underground geology and revive it to the rejuvenating snow melting geothermal fluid. In this way, the snow melting cooling reductant is revived by the artificial aquifer C to revive the snow melting geothermal fluid.

[0030]

INDUSTRIAL APPLICABILITY Underground geology planned for a snow melting facility always has geothermal heat that rises at a constant rate with increasing depth. The present invention has the following effects by selectively installing an underground device in each type of configuration described in the preceding paragraph according to the underground geology of the snow melting facility. 1. In the snowmelt operation, the snowmelt cooling and reducing liquid is exchanged with the snowmelt geothermal liquid unit, and the revived snowmelt geothermal liquid unit is continuously circulated as the snowmelt geothermal liquid unit or the revived snowmelt geothermal liquid unit that is effective by resuscitation. Even if there is a water layer, and the entire geology is impermeable, it is possible to plan according to its underground form. 2. A single underground device can reduce, replace, and revive the snowmelt medium liquid, making centralized management easier. 3. In the past, it was thought that two wells, a pumping well and a reducing well, were required to make such a plan, but one well is sufficient, so drilling costs are lower. 4. There is no depletion of groundwater, which is a valuable underground resource of snowmelt geothermal fluid.

5. After the snowmelt geothermal fluid is operated, it becomes a snowmelt cooling reductant and is reduced to the reducing layer a, while the snowmelt geothermal fluid is collected as fresh snowmelt geothermal fluid. That is,
There is no contamination of underground geology or groundwater because it is a continuous circulation snow melting method in which the resuscitated snowmelt geothermal fluid D is constantly returned to the reducing layer B as it is fresh. 6. Since the geothermal heat source is infinite, no fuel cost is required. 7. Since the mechanism is simple, there are few failures. 8. Because of the replacement of the snowmelt geothermal fluid unit and the resuscitation circulation method of the snowmelt geothermal fluid solution, snowmelting facilities can be established even in areas where urban sewerage facilities are not maintained. As is clear from the above, since the present invention has comprehensive advantages, it can be planned and constructed in a place required as a snow melting system.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a circulating underground device in which a cooling reducing liquid is used as a resuscitation / snow melting geothermal liquid.

FIG. 2 is a vertical cross-sectional view of another embodiment of a circulating underground device in which a cooling reducing liquid is used as a resuscitation / snow melting geothermal liquid.

FIG. 3 is a vertical cross-sectional view of another embodiment of a circulating underground device in which a cooling reducing liquid is used as a resuscitation / snow melting geothermal liquid.

FIG. 4 is an enlarged vertical sectional view of a divided packer portion.

[Explanation of symbols]

1 Circulating underground device that uses cooling reduced liquid as resuscitation / snow melting geothermal liquid 2 Geothermal collection casing 3 Insulation casing 4 Snow melting geothermal liquid circulation pipe 5 Pump 11 Circulating underground device that uses cooling reduced liquid as resuscitation / snow melting geothermal liquid 21 Geothermal collection Casing 21A1 Snow melting cooling reducing liquid reducing strainer 21A2 Geothermal liquid collecting strainer 31 Adiabatic casing 41 Snow melting geothermal liquid circulating piping 51 Pump 61 Dividing packer between reducing liquid and geothermal liquid 12 Circulating underground device for resuscitating and melting snow geothermal liquid 22 Geothermal Collection Casing 22A1 Snow Melting Cooling Reducing Liquid Reduction Strainer 22A2 Geothermal Liquid Collecting Strainer 32 Insulating Casing 42 Snow Melting Geothermal Liquid Circulation Pipe 52 Pump 62 Separation of Reducing Liquid and Geothermal Liquid Packer Reduction Layer Aquifer HA Artificial Aquifer Unit Geothermal fluid for snow melting D Resuscitation Snowmelt for geothermal fluid Water layer

Claims (3)

[Claims] 1. A geothermal collection casing (2) comprising a cylindrical portion (2A), a ceiling plate (2B) stretched and sealed at the upper and lower ends of the cylindrical portion, and a bottom plate (2C) to a predetermined depth in the ground. The heat insulation casing (3) is composed of a cylindrical portion (3A) and a ceiling plate (3B) stretched and sealed at the upper end of the cylindrical portion at the axial center of the geothermal collection casing (2).
Is drawn from above, the lower opening (3C) of the heat insulating casing (3) is opened near the bottom plate (2C) of the geothermal heat collecting casing (2), and is drawn into the heat insulating casing (3) from above. A pump (5) for pumping the revived snowmelt geothermal liquid (4) to the snowmelt geothermal liquid circulation pipe (4) is provided at the lower end (4A) of the snowmelt geothermal liquid circulation pipe (4), and also the snowmelt geothermal liquid circulation pipe. The tip (4B) of (4) penetrates the top plate (2B) of the geothermal collection casing (2) and communicates with the upper part of the geothermal collection casing (2). A circulating underground device that uses geothermal fluid. 2. The geothermal heat collecting casing (21) which is planted to reach a predetermined depth in the ground has a cylindrical portion (21A).
And a top plate (21B) stretched and sealed on the upper end of the cylindrical portion, and the reducing layer (a) is provided on the cylindrical portion (21A).
Is provided with a snowmelt cooling reducing liquid reducing strainer (21A1), and a position corresponding to the aquifer (b) is provided with a geothermal liquid collecting strainer (21A2), and the axial center of the geothermal collecting casing (21). The heat-insulating casing (31) drawn into the inside of the
A) and a ceiling plate (31
B), the lower opening (31C) of the heat insulation casing (31) is opened near the bottom of the geothermal collection casing (21), and the snow melting geothermal liquid circulation pipe is drawn into the heat insulation casing (31) from above. Lower end of (41) (41A)
A pump (51) is attached to the snow melting geothermal liquid circulation pipe (41) at its tip (41B).
1) penetrating the top plate (21B) of 1) and communicating with the upper part inside the geothermal collection casing (21),
A circulating ground using a cooling reducing liquid as a resuscitation / snow melting geothermal liquid, characterized in that a dividing packer (61) for the reducing liquid and the geothermal liquid is stretched between 1) and the heat insulating casing (31). apparatus. 3. A geothermal collecting casing (22) which is planted to reach a predetermined depth in the ground has a cylindrical portion (22A).
And a top plate (22B) stretched and sealed on the upper end of the cylindrical portion, and the reducing layer (a) is provided on the cylindrical portion (22A).
Is provided with a snowmelt cooling reducing liquid reducing strainer (22A1) at a position corresponding to the above, and a geothermal liquid collecting strainer (22A2) is provided at a position corresponding to the aquifer (b), and the axial center of the geothermal collecting casing (22). The heat-insulating casing (32) drawn into the cylinder from above is the cylindrical part (32).
A) and a ceiling plate (32
B), the lower opening (32C) of the heat insulation casing (32) is opened near the bottom of the geothermal heat collection casing (22), and the snowmelt geothermal liquid circulation pipe is drawn into the heat insulation casing (32) from above. Lower end of (42) (42A)
A pump (52) is attached to the snow melting geothermal liquid circulation pipe (41) at its tip (42B).
2) penetrating the top plate (22B) of 2) and communicating with the upper side in the geothermal collection casing (22),
A circulating ground using a cooling reducing liquid as a resuscitation / snow melting geothermal liquid, characterized in that a dividing packer (62) for the reducing liquid and the geothermal liquid is stretched between the heat insulating casing (32) and the heat insulating casing (32). apparatus.