JP2020133992A - Ground source heat utilization system - Google Patents

Abstract

To provide a ground source heat utilization system which is embedded in advance so as to recover ground source heat with a medium and effectively utilize the ground source heat on the ground, achieves good maintainability, and utilizes the medium that does not affect an underground environment.SOLUTION: A ground source heat utilization system (1) transports a medium (L3) that recovers ground source heat to the ground in a state that steam is prevented from occurring and utilizes the heat on the ground. The ground source heat utilization system (1) includes a medium process system (20) which processes raw water to change it into a medium (L5) that is soft water.SELECTED DRAWING: Figure 1

Description

The present invention relates to a geothermal heat utilization system that recovers geothermal heat from a heat source in the ground and utilizes the recovered heat energy on the ground to promote energy saving.

Conventionally, a method of generating geothermal power has been known as a method of utilizing geothermal heat. In geothermal power generation equipment, natural steam existing in the geotropics is extracted using natural pressure and separated into steam and water for use. Therefore, the extracted steam contains sulfur and other impurities peculiar to the geotropics. Is contained in a large amount. These impurities become scales and adhere to hot wells, pipes, turbine blades, and the like. If the scale adheres, the amount of power generation decreases over time, making it difficult to use for a long period of time.

In Patent Document 1, in a binary power generation system, a geothermal absorber in which water descends from the ground to the geothermal zone, absorbs heat in the geothermal zone and rises to the ground, and water passing through the geothermal absorber is on the primary side. A heat exchanger in which a liquid having a boiling point lower than that of water is supplied to the secondary side and heat is transferred from the water to the liquid to vaporize the liquid, and a steam turbine that rotates with the steam generated by the heat exchanger. The present invention is a geothermal power generation system comprising: a geothermal absorber, a primary side of a heat exchanger, and a first circulation flow path in which a pump is provided in the flow path and water is circulated by the pump.

JP-A-2014-156843

In the power generation method in which hot spring water is pumped up and used, scale adheres to equipment such as piping equipment and turbines, and the amount of power generation decreases over time, or maintenance is required. In terms of the environment, hot spring water is pumped up and used, which may affect the amount of hot spring water discharged. In addition, the water that has been pumped up and used for power generation is returned to the ground from the reduction well, but it contains chemical substances for removing scale and has a considerable impact on the environment.
Further, as seen in Patent Document 1, the method of generating power using only underground heat is effective because it is environmentally friendly and it is not necessary to consider concerns about the amount of hot spring water and chemical substances.

However, the hot water heated underground may not always be hot, depending on the temperature of the tropics. Therefore, when high temperature is required, it is necessary to excavate deeply. Therefore, some of these systems, such as pipes buried in the ground, are difficult to replace once they are buried in the ground. Therefore, the pipes, etc. are made of materials that can withstand pressure and are corroded. It is necessary to use materials with few materials.
In addition, as the medium for heat exchange in the ground, it is necessary to use a medium that does not affect the underground environment even if an unexpected situation occurs and the medium leaks.

The present invention has been made in view of such problems, and an object of the present invention is to provide a geothermal heat utilization system using a medium that has good maintainability of the geothermal heat system and does not affect the underground environment. To do.

The present invention has adopted the following means in order to achieve the above-mentioned object.

A geothermal heat utilization system that uses a transport pump to transport a medium that has recovered the heat in the ground to the ground without generating steam, and uses that heat on the ground. It is characterized by being equipped with a medium processing system that changes the medium into a new medium.

Due to the above features, by using a medium from which hard substances that cause scale such as calcium and magnesium have been removed, dirt in the system is less likely to adhere, resistance in the transport path is reduced, and transport by a transport pump, etc. Less addition to the device. Therefore, the heat utilization system can be used for a long period of time.

FIG. 1 is a schematic view showing the configuration of the geothermal heat utilization system of the present invention according to the first embodiment. FIG. 2 is a relationship diagram showing the relationship between the depth of the medium transfer pipe of the geothermal heat utilization system of the present invention and the temperature distribution of hot water according to the first embodiment. FIG. 3 is a schematic view showing the configuration of the geothermal heat utilization system of the present invention according to the second embodiment. FIG. 4 is a schematic view showing the configuration of the geothermal heat utilization system of the present invention according to the third embodiment. FIG. 5 is a schematic view showing the configuration of the geothermal heat utilization system of the present invention according to the fourth embodiment. FIG. 6 is a schematic view showing the configuration of the deoxidizer 60 of the geothermal heat utilization system of the present invention according to the first embodiment.

The first to fourth embodiments of the geothermal heat utilization systems 1, 100, and 400 according to the present invention will be described in detail with reference to the drawings. It should be noted that the embodiments and drawings described below exemplify a part of the embodiments of the present invention, are not used for the purpose of limiting to these configurations, and do not deviate from the gist of the present invention. Can be changed as appropriate in. The corresponding components in each figure are designated with the same or similar reference numerals.

(First Embodiment)
The geothermal heat utilization system 1 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic view showing the configuration of the geothermal heat utilization system of the present invention according to the first embodiment. FIG. 2 is a relationship diagram showing the relationship between the depth of the medium transfer pipe 10 of the geothermal heat utilization system 1 of the present invention and the temperature distribution of hot water according to the first embodiment.

The geothermal heat utilization system 1 will be described with reference to FIG. The geothermal heat utilization system 1 is composed of a geothermal heat exchange system C that recovers the heat in the ground and a heat utilization system K that utilizes the heat on the ground. The geothermal heat exchange system C is mainly composed of a heat medium transfer pipe 10, a heat exchanger E, a transfer pump 3, and a medium processing system 20.

In the medium transfer pipe 10 shown in FIG. 2, the medium transfer pipe 10 is buried from the surface S to the tropics U which is a heat source in the deep underground. A cylindrical medium injection pipe 11 is embedded in the medium transfer pipe 10 on the outside, and the circumference of the medium injection pipe 11 is in front of the region from the ground surface S to the geothermal U, that is, a temperature lower than the temperature required for power generation. The underground area of the building is hardened with geothermal cement, etc., so that there is no danger of collapse. The deepest part of the medium injection pipe 11 of the medium transfer pipe 10 absorbs heat from the fluid or bedrock of the tropics U. The total length of the medium transfer pipe 10 changes depending on the temperature of the geotropic U, and extends to a desired heat source, for example, a geotropic U capable of absorbing about 200 ° C. as heat.

The medium injection tube 11 is made of a material such as steel or stainless steel. In the region of the tropical U where the temperature is high, the medium injection pipe 11 is formed so as to have a large surface area in order to easily transfer the heat of the tropical U to the outer periphery, and columnar fins having a circular cross section are welded. ing. The medium injection pipe 11 has a heat insulating structure provided with a heat insulating material or an air layer so that the heat of the medium L1 to be injected hot water is not taken away in a region having a low temperature close to the ground surface S.

Inside the medium injection pipe 11, a cylindrical medium take-out pipe 12 for transferring water heated in the tropics U is provided. The medium take-out pipe 12 is formed inside the medium injection pipe 11 in a cylindrical shape coaxially. The medium take-out pipe 12 has a double structure in which the structure inside the cross section in the vertical direction forms a fiber, a resin, or an air layer of a heat insulating material between the outer portion and the inner portion. This double structure not only has a heat insulating effect, but also increases the volume, reduces the density, and brings it closer to the density of water. Therefore, when installing, water is injected into the medium injection pipe 11 as a medium, and then this double structure is used. Buoyancy is generated by inserting the medium take-out pipe 12 which has been removed, and the load on the device for suspending and supporting the medium take-out pipe 12 can be reduced.

In the present invention, as shown in the shading of FIG. 2, the heat insulating region of the medium injection pipe 11 and the medium take-out pipe 12 is formed of a material having a heat transfer coefficient of 0.1 W / m · K or less. The best one has a heat insulating performance of 0.05 W / m · K to 0.001 W / m · K. By maintaining the heat insulating performance, it is possible to prevent the temperature from dropping at the outlet, and as a result, it is not necessary to set the pressure of the transfer pump 3 high. In FIG. 2, the broken line shows the underground temperature distribution 21 including the geotropic U, and the solid line shows the medium temperature distribution 25 of hot water (L1 to L3).

Further, the outlet pressure of the medium L3 to be hot water is preferably a pressure range larger than at least the evaporation curve by the transfer pump 3 in consideration of the pressure loss of the medium injection pipe 11 and the medium take-out pipe 12, and the temperature is equal to or higher than the boiling point. The pressure was set so that steam would not be generated so that the hot water could be transferred as it was.
Further, the medium injection pipe 11 is made of a material having a high thermal conductivity of 50 W / m · K in a region having a high temperature distribution in the ground, that is, an endothermic region required for power generation. If it is particularly high, it may have a high conductivity, but considering the pressure and corrosion in the ground, it is desirable to form it with a metal material, and the effective thermal conductivity is 20 W / m · K or more. Good.

The medium L3 as hot water, which recovers the underground heat of the geotropical U by the pressure of the transfer pump 3 from the ground medium transfer pipe 10 and is transported without steam, is a heat exchange unit that is bent dozens of times. It passes through the heat exchanger E provided with 9. The medium L4 as hot water that has exchanged heat is transported to the tropics U again.

Further, a switching valve PV is provided in the middle of the heat exchanger E and the transfer pump 3. It is used to stop operation during inspection and to replace water as a medium. Further, the switching valve PV is connected to the medium processing system 20.
The medium treatment system 20 is provided with a spare pump 5 and a water treatment device 4. The spare pump 5 is used as a spare when the transfer pump 3 fails, and at the same time, is used to transfer the raw water used at the initial stage.

The water treatment device 4 is used when initially generating water as a medium L5 to be charged into the geothermal heat exchange system C. The water treatment device 4 is a device for purifying soft water from which hardness components (calcium, magnesium) in raw water serving as river water or industrial water have been removed. In particular, the ion exchange resin provided in the water treatment apparatus 4 can exchange calcium ions and magnesium ions in water with sodium to generate a certain amount of soft water. Further, since the water treatment device 4 can purify soft water that is a non-conductor that does not conduct electricity, the purified soft water is less likely to adsorb impurities.

The ion exchange resin can be regenerated with a saline solution or the like, and even if the soft water cannot be regenerated, it can be reused by washing the ion exchange resin with the saline solution. The sodium ion of the saline solution is a device that can be exchanged with calcium ions and magnesium ions adsorbed on the ion exchange resin, and the sodium ion is adsorbed on the ion exchange resin to collect soft water again.

By using soft water for the medium L5, it is possible to prevent dirt such as calcium and magnesium from adhering to the path in the geothermal heat exchange system C such as the piping of the ground medium transfer pipe 10. Further, the resistance in the pipe is reduced as compared with hard water or water without ion exchange, and the media L1, L2, L3, and L4 can be circulated without imposing a burden on the transfer pump 3. Further, the water treatment device 4 removes bubbles such as dissolved oxygen by using a deoxidizer or a deoxidizer as described below.

In particular, the medium of water L5 that has been deoxidized using a substitution method using an inert gas 62 or the like can passivate the medium or the inside of the pipe by circulating inside the pipe. This makes it possible to prevent corrosion of the metal portion of the path in the geothermal heat exchange system C.
The deoxidizer 60 for passivation in detail is shown in FIG. The water treatment device 4 is provided with a gas replacement type deoxidizing tank 65 inside. The gas replacement type deoxidizing tank 65 introduces the inert gas 62 from the gas introduction pipe 61, and removes the dissolved oxygen 64 existing inside the water L5 which is the medium of the gas replacement type deoxidizing tank 65 from the gas discharge pipe 63. The medium is passivated by letting it escape. Also,

In addition, typical examples of antacids include hydrazine, tannin, and products derived from plant spots. Further, in the deoxidizing device 60 using the inert gas 62, the inert gas 62 that does not easily cause a chemical reaction is adopted. As an example of the inert gas 62, less harmful helium, neon, nitrogen, argon and the like are adopted. In particular, since it is necessary to control the pressure of the heat exchange medium at a high temperature as in the present invention, a deoxidizer or a deoxidizer 60 that does not cause a change in physical properties is preferable.
Further, the inert gas such as nitrogen is easily dissolved in water by using a microbubble generator and injected, so that the gas is easily replaced with oxygen.
In addition, the water treatment device 4 also includes a filtration device that filters out impurities when using river water.

Next, a power generation system using binary power generation will be described as an example of the heat utilization system K.
The working medium M1 heated by the heat exchange unit 51 of the heat exchanger E evaporates to rotate the steam turbine T, and the generator G generates electricity.
The power receiving facility TF supplies electricity and supplies electricity to an electric power company or the like via a power transmission network. Here, as the working medium M1, M2, M3, a non-flammable or non-toxic inert gas such as HFC-245fa or R245fa or a medium having a low boiling point (a mixture of water and ammonia, a hydrocarbon (pentane)) or the like is used. To.

As the steam turbine T, an expansion turbine or the like is used. The working medium M2 that has passed through the steam turbine T is cooled by the cooling water 57 of the cooler 56. Further, the working medium M3 is condensed from gas to liquid or the like and sent to the heat exchange unit 51 again by the circulation pump 55.
By using such an operating medium (M1 to M3), even hot water at 70 ° C. to 95 ° C. can generate electricity if the flow rate is 9 t / h (hours) to 24 t / h. In this system, it is a power generation system that exchanges heat in a system in which the medium is closed.

(Second Embodiment)
The geothermal heat utilization system 100 will be described with reference to FIG. 3 as an example system in which the heat utilization system K is constructed mainly by steam power generation. In the geothermal heat exchange system C, the same reference numerals are given to the parts described in the first embodiment, and the configurations are the same. Therefore, the description thereof will be omitted and different parts will be described. The geothermal heat utilization system 1 mainly includes a transfer pump 3, a medium transfer pipe 10, a hot water service tank 16, a condensate unit 17, the above-mentioned medium treatment system 20, a steam separator F, a steam turbine T, a generator G, and the like. It is composed of power receiving equipment TF.

The underground heat utilization system 100 supplies steam V1 to the steam turbine T to rotate a generator G to generate electricity, supply electricity to the power receiving equipment TF, and supply electricity to an electric power company or the like via a power transmission network. It is to supply.
The steam turbine T may be of a screw type or the like as well as a turbine type, and may be of a type capable of generating electricity by steam. The steam V1 supplied to the steam turbine T is generated by the steam separator F by depressurizing the medium L3, which is hot water and is carried under pressure so as not to become steam, and boiling it.

Since the total amount of the medium L3 which is hot water supplied to the steam separator F is not regarded as steam V1, the medium L6 which is a large amount of hot water from the steam separator F, so-called drain, is the hot water service tank 16 Will be sent to. Further, the steam V3 exhausted by the steam turbine T is sent to the condensate unit 17, and the steam V4 sent to the condensate unit 17 is sent to the cooling tower 15 connected to the condenser 6. The sent steam V4 is condensed and returned to water, passes through the condenser 6, is temporarily stored in the condenser tank 14, and then is sent to the hot water service tank 16 by the condenser pump 7. The hot water service tank 16 can supply steam V2 to the steam separator F again and use it as steam for steam power generation.

The medium L9 which is the hot water of the hot water service tank 16 is transferred to the medium transfer pipe 10 as the medium L1 which is the hot water by the transfer pump 3. The medium L1 transferred by the transfer pump 3 again absorbs heat from the geothermal heat in a deep part of the geotropic U and exchanges heat. The medium L2, which is the heat-exchanged hot water, is transferred by the transfer pump 3 by the medium transfer pipe 10 described later.

The condensate unit 17 has a function of condensing steam V3 exhausted from the turbine T and returning it to water, and is mainly composed of a condenser 6, a condensate tank 14, and a cooling tower CT. The steam V3 received by the condenser 6 is cooled by the cooling tower CT, returns to the medium L8 which is condensed and hot water, passes through the condenser 6, and is stored in the condenser tank 14. The medium L8, which is the stored hot water, is sent to the hot water service tank 16 by the condensate pump 7, and is stored in the hot water service tank 16.

As the cooling method by the cooling tower CT, an air-cooled type, a water-cooled type using river water, seawater, or the like, or a geothermal heat replacement type that is buried in the ground and exchanges heat in the ground can be adopted. .. Further, the medium L5, which is soft water obtained by purifying river water or the like treated by the medium treatment system 20 described above, is initially put into the geothermal heat utilization system 100.

(Third Embodiment)
The geothermal heat utilization system 400 is a geothermal heat utilization system 400 that employs a plurality of geothermal heat exchange systems C and recovers a larger amount of heat from the geothermal U. The geothermal heat utilization system 400 will be described with reference to FIG. In the heat utilization system K, the same reference numerals are given in the parts described in the first embodiment, and the configurations are the same. Therefore, the description thereof will be omitted, and different parts of the geothermal heat exchange system C will be described.

As shown in FIG. 4, the medium transfer pipe 410 has a plurality of medium transfer pipes (410a to 410f) installed from the surface S to the tropics U.
In the geothermal power generation system 400, the medium injection pipe 11 absorbs the geothermal heat of the geotropical U, exchanges heat with the medium (L2) which is hot water, and transfers the medium (L3) which is hot water to the ground. If the temperature of the medium L3 drops due to reasons such as the heat of the geothermal U near the medium injection pipe 11 not recovering, the switching valve PV provided on the ground side of the medium transfer pipe (410a to 410f) and The flow path switching valves 413 and 414 are switched to circulate water as a heat medium in the medium transfer pipes (410a to 410f) leading to the geothermal U.

When the medium L3 is circulated in the medium transfer pipe 410 (410a to 410f), it is normally circulated by heat convection, but a pressure pump 411 is provided so that hot water does not boil. Further, the geothermal power generation system 400 circulates through a plurality of medium transfer pipes 410 (410a to 410f) by applying pressure by heat convection so as not to boil even during normal power generation, but the pressure is increased by heat convection. If not enough, use pump 411. The pressure feed pump 411 plays a role of adjusting the pressure so that the pressure in the heat medium transfer pipe 410 (410a to 410f) becomes constant.

Hot water is circulated in the medium transfer pipe 410 (410a to 410f) in a single-phase flow by applying pressure in the medium transfer pipe 410 (410a to 410f) to prevent boiling. Compared with the case of circulating in the medium transfer pipe 410 (410a to 410f) in the state of multiphase flow, it is possible to effectively absorb heat from the geotropic U.

The medium transfer pipe 410 (410a to 410f) includes a circulation sensor unit 412 provided with a temperature sensor and a pressure sensor for measuring the temperature and pressure of the hot water L3 in the middle of the circulation path. The medium transfer pipe 410 (410a to 410f) uses the pressure control valve PV to generate hot water even when power generation is not performed due to regular maintenance or an unexpected temperature drop in the tropics U due to a natural disaster or the like. Water can be circulated including the tropics U so that the temperature becomes uniform, and the temperature of the circulated hot water can be made uniform. Therefore, by measuring the circulation sensor unit 412 provided on the ground, the ground Even if the temperature in the tropics U is unknown, it is possible to estimate the temperature state of the tropics U and use it as an index for planning the amount of power generation.

(Fourth Embodiment)
Among the embodiments described in the above-mentioned geothermal heat utilization systems 1, 100, and 400, a modification of the heat utilization system K that utilizes the heat recovered from the ground by the geothermal heat exchange system C will be described with reference to FIG. To do.
The heat utilization system K shows a plurality of forms in which the heat recovered from the ground by the underground heat exchange system C is utilized.

For example, steam boiler and steam utilization equipment 31-1 to n, hot water supply equipment 32-1 to n, distillation equipment 33-1 to n, absorption chiller 34-1 to n, power generation equipment 35-1 to n, power generator. 36-1 to n, steam generators 37-1 to n, heating furnaces 38-1 to n, heat storage devices 39-1 to n, indoor air conditioning equipment 40-1 to n, and steam turbine power devices 41-1 to n. is there. These supply a heat source from the medium L3, which is hot water obtained from the heat recovered by the geothermal heat exchange system C, to each device (31-1 to 41-n) via a transfer pipe 18. Further, the hot water or steam medium L4 used in each device (31-1 to 41-n) is recovered by the recovery pipe 19. Then, the medium L4 is returned to the ground again by the geothermal heat exchange system C to utilize the medium L3 which is hot water for recovering heat.

For the transfer pump 3, the pressure feed pump 411, the spare pump 5, and the condensate pump 7 described above, stainless steel or the like that does not rust is used.

(Other technical features considered from the above embodiments)
An example of the technical features of the present embodiment is shown in parentheses below, but it is not particularly limited and is illustrated, and the effects that can be considered from these features are also described.
<First feature point>
A geothermal heat utilization system that transports a medium that has recovered heat in the ground (for example, mainly medium L1 or the like) to the ground without generating steam, and uses the heat on the ground.
It is characterized by being provided with a medium processing system (for example, mainly a medium processing system 20) that changes raw water into a medium (for example, mainly medium L5) that has been treated to soften water.

Due to the above features, by using a medium from which hard substances that cause scale such as calcium and magnesium have been removed, it becomes difficult for dirt in the geothermal heat utilization system to adhere, and the resistance of the transport path is reduced for transport. Less addition to transport equipment such as pumps. Therefore, the heat utilization system can be used for a long period of time.

<Second feature>
The medium treatment stem is a passivation treatment device (for example, mainly a deoxidizer) that removes dissolved oxygen (for example, mainly dissolved oxygen 64) of the raw water and immobilizes the medium (for example, mainly medium L5). It is characterized by having 60).
With the above features, it is possible to suppress corrosion of metal parts and the like in the geothermal heat utilization system by passivating the medium. Therefore, the heat utilization system can be used for a long period of time.

<Third feature point>
The medium treatment stem is characterized by including a soft water purification device (for example, mainly a water treatment device 4) for purifying soft water as a non-conductor that does not conduct electricity.
Due to the above characteristics, impurities are less likely to be adsorbed on the medium, and dirt in the system is less likely to adhere. In addition, the resistance of the transport path is reduced, and the addition to the transport device such as a transport pump is reduced. Therefore, the heat utilization system can be used for a long period of time.

<Fourth feature>
The medium treatment stem is characterized by comprising a soft water purification apparatus (for example, mainly a water treatment apparatus 4) for purifying soft water from which hardness components have been removed by ion exchange.

Due to the above features, by using a medium from which hard substances that cause scale such as calcium and magnesium have been removed, dirt in the system is less likely to adhere, resistance in the transport path is reduced, and transport by a transport pump, etc. Less addition to the device. Therefore, the heat utilization system can be used for a long period of time.

<Fifth feature point>
The soft water purification apparatus is characterized by including an ion exchange resin that performs ion exchange.
Due to the above features, the device is simplified and maintenance is easy.

<Sixth feature point>
The soft water purification apparatus is characterized in that the ion exchange resin can be reused by adhering sodium ions to the ion exchange resin.
Due to the above characteristics, it is economically advantageous because it can be reused and can be used many times.

<7th feature>
A plurality of medium transfer pipes (for example, mainly medium transfer pipe 410) for recovering geothermal heat from the medium generated by the medium processing stem are embedded, and pressures that can be controlled for each of the medium transfer pipes are embedded. It is characterized by being provided with a pump (for example, mainly a pressure pump 411).
With the above features, the heat recovered from the ground can be used in a wide variety of equipment even in a large-scale facility.

<Eighth feature point>
The medium that has recovered the geothermal heat can be transported to a plurality of different types of heat utilization devices (for example, mainly each device (31-1 to 41-n)) that utilize the heat recovered on the ground. It is characterized by being provided with a transport path (for example, mainly a transport pipe 18).

With the above features, the heat recovered from the ground can be used in a wide variety of equipment even in a large-scale facility.

<Ninth feature point>
It is characterized in that it is provided with a recovery path (for example, mainly a recovery pipe 19) capable of recovering exhaust heat from the plurality of heat utilization devices via the medium and transporting the exhaust heat to the medium transfer pipe again. ..

With the above features, the heat recovered from the ground can be used in a wide variety of equipment even in a large-scale facility.

It goes without saying that the present invention is not limited to the above-described embodiments, and can be implemented in various aspects as long as it belongs to the technical scope of the present invention.

As shown in the above-described embodiment, the heat recovery system can be used not only in the tropics where hot springs spring out, but also in volcanic areas, volcanic areas in the sea, and the like.

1,100,400 ... Geothermal heat utilization system,
3 ... Conveyor pump,
4 ... Water treatment equipment,
5 ... Spare pump,
6 ... Condenser,
7 ... Condensate pump,
9 ... Heat exchange part,
10, 410 ... Media transfer tube,
11 ... Medium injection tube,
12 ... Media take-out pipe,
14 ... Condensate tank,
15 ... Cooling tower,
16 ... Hot water service tank,
17 ... Condensate unit,
18 ... Transfer piping,
19 ... Recovery piping,
20 ... Media processing system,
21 ... Geotropical temperature distribution,
25 ... Medium temperature distribution,
31-1 to n ... Steam boiler and steam utilization equipment 31-1
32-1 to n ... Hot water heater,
33-1 to n ... Distiller,
34-1 to n ... Absorption chiller,
35-1 to n ... Power generator,
36-1 to n ... Power generator,
37-1 to n ... Steam generator,
38-1 to n ... Heating furnace,
39-1 to n ... Heat storage device,
40-1 to n ... Indoor air conditioner,
41-1 to n ... Steam turbine power unit,
50 ... Heat exchange part,
51 ... Heat exchange unit,
55 ... Circulation pump,
56 ... Cooler,
57 ... Cooling water,
60 ... Deoxidizer,
61 ... Gas introduction pipe,
62 ... Inert gas,
63 ... Gas discharge pipe,
64 ... Dissolved oxygen,
65 ... Gas replacement type deoxidizing tank,
411 ... Pumping pump,
412 ... Circulation sensor unit,
413, 414 ... Flow path switching valve,
C ... Geothermal heat exchange system,
CT ... Cooling tower,
F ... Brackish water separator,
K ... Heat utilization system,
T ... Steam turbine,
G ... Generator,
TF ... Power receiving equipment,
PV ... Switching valve S ... Ground surface,
U ... Tropical.

Claims (9)

A geothermal heat utilization system that uses a transport pump to transport a medium that has recovered the heat in the ground to the ground without generating steam, and uses that heat on the ground.
A geothermal heat utilization system characterized by being equipped with a medium treatment system that treats raw water into a softened medium. The geothermal heat utilization system according to claim 1, wherein the medium treatment stem includes a passivation treatment device that removes dissolved oxygen in the raw water and immobilizes the medium. The geothermal heat utilization system according to any one of claims 1 and 2, wherein the medium processing stem is provided with a soft water purification device for purifying soft water as a non-conductor that does not conduct electricity. The geothermal heat utilization system according to claim 3, wherein the medium treatment stem includes the soft water purification apparatus for purifying soft water from which a hardness component has been removed by ion exchange. The geothermal heat utilization system according to claim 4, wherein the soft water purification apparatus includes an ion exchange resin that performs ion exchange. The geothermal heat utilization system according to claim 5, wherein the soft water purification apparatus can reuse the ion exchange resin by adhering sodium ions to the ion exchange resin. A claim characterized in that a plurality of medium transfer pipes for recovering geothermal heat are embedded in the medium generated by the medium processing system, and each of the medium transfer pipes is provided with a controllable pressure pump. The geothermal heat utilization system according to claim 1 to 6. Claims 1 to 7 are provided with a transport path capable of transporting the medium that has recovered geothermal heat to a plurality of different types of heat utilization devices that utilize the heat recovered on the ground. Geothermal heat utilization system described in. The geothermal heat according to claim 8, further comprising a recovery path capable of recovering exhaust heat from the plurality of heat utilization devices via the medium and then transporting the exhaust heat to the medium transfer pipe again. Usage system.

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