CN116717925A - Geothermal energy utilization system - Google Patents
Geothermal energy utilization system Download PDFInfo
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- CN116717925A CN116717925A CN202310927986.6A CN202310927986A CN116717925A CN 116717925 A CN116717925 A CN 116717925A CN 202310927986 A CN202310927986 A CN 202310927986A CN 116717925 A CN116717925 A CN 116717925A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000005482 strain hardening Methods 0.000 claims abstract description 53
- 238000003860 storage Methods 0.000 claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims description 79
- 239000012530 fluid Substances 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 20
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- 230000005484 gravity Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 13
- 238000010248 power generation Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 238000005381 potential energy Methods 0.000 description 4
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- 230000005540 biological transmission Effects 0.000 description 2
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- 238000002844 melting Methods 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G4/00—Devices for producing mechanical power from geothermal energy
- F03G4/023—Devices for producing mechanical power from geothermal energy characterised by the geothermal collectors
- F03G4/029—Devices for producing mechanical power from geothermal energy characterised by the geothermal collectors closed loop geothermal collectors, i.e. the fluid is pumped through a closed loop in heat exchange with the geothermal source, e.g. via a heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T50/00—Geothermal systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The application provides a geothermal energy utilization system, which comprises a cold working medium tank, a geothermal well, a thermal working medium storage device, a steam generator, a high-pressure processor and a turbo generator, wherein the cold working medium tank is connected with the geothermal well; the cold working medium tank is communicated with the geothermal well, and the cold working medium in the cold working medium tank is output to the geothermal well for heat exchange to form a first thermal working medium; the geothermal well is communicated with the thermal working medium storage device, and the first thermal working medium in the geothermal well is output to the thermal working medium storage device; the first thermal working medium in the thermal working medium storage device is output to the steam generator so as to evaporate water in the steam generator into steam; the steam generator is communicated with the high-pressure processor, and the steam in the steam generator is output to the high-pressure processor; the high-pressure processor is communicated with the steam turbine generator, so that steam in the high-pressure processor is output to the steam turbine generator to drive the steam turbine generator to generate power. The geothermal energy utilization system improves the utilization efficiency of geothermal energy and has wide application range.
Description
Technical Field
The application relates to the technical field of new energy utilization, in particular to a geothermal energy utilization system.
Background
In recent years, with the continuous improvement of the technology level, people have new knowledge of renewable resources, and geothermal heat is one of newly discovered renewable resources, and has stability, continuity and high availability. When geothermal resources are used for power generation, the geothermal resources are hardly influenced by weather, the electric power can be continuously transmitted to a power grid, geothermal energy is stored in a stratum with permeability in deep underground, and the temperature of the underground is increased along with the increase of the depth.
At present, most geothermal power plants acquire high-pressure hot water from deep underground and convert the hot water into steam to drive a generator to generate power, and the steam is cooled, condensed into water and injected into the underground for reuse.
However, the geothermal power generation mode has high requirements on the temperature of groundwater, poor applicability, more energy loss in the power generation process and low power generation efficiency.
Disclosure of Invention
The application provides a geothermal energy utilization system which is used for solving the problems of low geothermal power generation efficiency and more energy loss in the prior art.
The application provides a geothermal energy utilization system which comprises a cold working medium tank, a geothermal well, a thermal working medium storage device, a steam generator, a high-pressure processor and a turbo generator.
The cold working medium tank is used for storing cold working medium, the cold working medium tank is communicated with the geothermal well, and the cold working medium in the cold working medium tank is output to the geothermal well for heat exchange to form a first thermal working medium.
The geothermal well is communicated with the thermal working medium storage device, and the first thermal working medium in the geothermal well is output to the thermal working medium storage device.
The heat working medium storage device is communicated with the steam generator, and a first heat working medium in the heat working medium storage device is output to the steam generator for heat exchange, so that liquid water in the steam generator is evaporated into steam.
The steam generator is communicated with the high-pressure processor, and the steam in the steam generator is output to the high-pressure processor for pressurization.
The high-pressure processor is communicated with the steam turbine generator, so that steam in the high-pressure processor is output to the steam turbine generator to drive the steam turbine generator to generate power.
In one possible implementation manner, the geothermal energy utilization system provided by the application, the steam generator comprises a first heating element and a steam generating element, and the first heating element is used for increasing the temperature of the steam generating element so as to evaporate liquid water in the steam generating element into steam.
The first heating piece is communicated with the thermal working medium storage device, so that the first thermal working medium is output from the thermal working medium storage device to the first heating piece, and the first thermal working medium exchanges heat in the first heating piece to form a second thermal working medium.
The first steam output port of the steam generating part is communicated with the high-pressure processor so that the steam in the steam generating part is output to the high-pressure processor.
In a possible implementation manner, in the geothermal energy utilization system provided by the application, steam in the steam turbine generator drives the steam turbine generator to generate electricity to form liquid water, and the second water output port of the steam turbine generator is communicated with the first water input port of the steam generating member so that the water in the steam turbine generator is output to the steam generating member.
In one possible implementation manner, the geothermal energy utilization system provided by the application further comprises a heat exchange assembly, wherein the heat exchange assembly is used for providing heat energy for external equipment, the heat exchange assembly comprises at least two heat exchangers, each heat exchanger comprises a second heating element and a heating element, the second heating element is used for increasing the temperature of the heating element, and the second heating elements of the heat exchangers are sequentially communicated.
The first heating piece is communicated with the second heating piece, so that the second heat working medium is output from the first heating piece to the second heating piece for heat exchange to form a cold working medium, and the second heating piece is communicated with the cold working medium tank, so that the cold working medium is output from the second heating piece to the cold working medium tank.
In a possible implementation manner, in the geothermal energy utilization system provided by the application, the high-pressure processor is communicated with the second steam input port of the turbo generator and outputs steam to the turbo generator to drive the turbo generator to generate power in a concentrated mode, the second steam output port of the turbo generator is communicated with the third steam input port of the heating piece so that the steam remained after the turbo generator is driven to generate power is output to the heating piece, the third water output port of the heating piece is communicated with the first water input port of the steam generating piece, and the steam in the heating piece is cooled into liquid water and then is output to the steam generating piece.
In one possible implementation, the geothermal energy utilization system provided by the present application, the thermal working medium storage device is a thermal working medium tank.
In one possible implementation, the application provides a geothermal energy utilization system, the thermal medium storage being a thermal mass seal well.
In one possible implementation, the geothermal energy utilization system provided by the application is provided with a mechanical wheel, a steel strand and a mass in a thermal mass seal well.
The thing piece is in butt with the inside wall of thermal mass seal well, and the one end and the thing piece of steel strand wires are connected, and the other end and the mechanical wheel of steel strand wires are connected, and the thing piece rises the moment wheel rotation makes the steel strand wires twine in mechanical wheel week side.
The mechanical wheel is connected with the mechanical generator, and when the object blocks descend, the object blocks drive the mechanical wheel to rotate through the steel stranded wires, so that the mechanical generator is driven to generate electricity.
In one possible implementation, the geothermal energy utilization system provided by the application, the working substance input port and the working substance output port of the thermal mass seal well are positioned at the bottom of the thermal mass seal well.
Outputting a first thermal working medium in the geothermal well to the thermal mass seal well, and extruding and lifting the object blocks; after the first thermal medium in the thermal mass seal well is output, the mass is lowered by gravity.
In one possible implementation manner, the geothermal energy utilization system provided by the application is provided with check valves at the working medium input port and the working medium output port of the thermal mass sealing well.
The application provides a geothermal energy utilization system which comprises a cold working medium tank, a geothermal well, a thermal working medium storage device, a steam generator, a high-pressure processor and a steam turbine generator. The cold working medium is output from the cold working medium tank to the geothermal well to form a first thermal working medium after heat exchange, the first thermal working medium is output from the geothermal well to the thermal working medium storage device, and then the first thermal working medium is output from the thermal working medium storage device to the steam generator, so that water in the steam generator is evaporated into steam, the steam is pressurized by the high-pressure processor and then is output to the steam turbine generator to generate power, and the geothermal energy is converted into mechanical energy and then is converted into electric energy to realize geothermal energy power generation. The rotating speed of the generator can be increased by pressurizing the steam, so that the generating efficiency is effectively improved. In addition, the application also provides a heat exchange assembly, the first heat working medium forms a second heat working medium after heat exchange in the steam generator, and the second heat working medium enters the heat exchange assembly to exchange heat again to supply heat to the outside, thereby further improving the energy utilization efficiency of geothermal energy and reducing the loss of heat energy.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a geothermal energy utilization system according to an embodiment of the present application;
FIG. 2 is a schematic view of the heat exchanger of FIG. 1;
FIG. 3 is a schematic diagram of a communication structure of the steam generator, heat exchange assembly, high pressure processor and turbo generator of FIG. 1;
FIG. 4 is a schematic diagram of a geothermal energy utilization system according to another embodiment of the present application;
fig. 5 is a schematic view of the structure of the heat sealed well in fig. 4.
Reference numerals illustrate:
100-a geothermal energy utilization system;
110-a cold working medium tank;
120-geothermal well;
130-a thermal working medium storage device; 131-a hot working medium tank; 132-thermal mass seal well; 1321-mechanical wheel; 1322-steel strand; 1323-block; 1324-working medium input port; 1325-working medium outlet; 1326-check valve;
140-a steam generator; 141-a first heating element; 142-steam generator; 1421-a first steam outlet; 1422-a first water input;
150-a high-pressure processor;
160-a turbo generator; 161-a second water outlet; 162-a second steam input; 163-a second steam outlet;
170-a heat exchange assembly; 171-heat exchanger; 1711-a second heating element; 1712-heating element; 1712 a-a third steam inlet; 1712 b-a third water outlet;
180-mechanical generator.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
As demonstrated by the background art, in the prior art, by making a geothermal well, obtaining high-pressure hot water from the deep underground, converting the high-pressure hot water into steam, and generating electricity by using geothermal heat, the generating efficiency of generating electricity in this way is lower, the applicability is poor, the geothermal energy loss in the generating process is larger, and the utilization rate of geothermal energy is low.
Aiming at the technical problems, the embodiment of the application provides a geothermal energy utilization system which comprises a cold working medium tank, a geothermal well, a hot working medium storage device, a steam generator, a high-pressure processor and a turbo generator. The cold working medium in the cold working medium tank is firstly output into the geothermal well for heat exchange to form a first thermal working medium, the first thermal working medium is output into the thermal working medium storage device, and then is output into the steam generator from the thermal working medium storage device, so that water in the steam generator is heated and evaporated into steam, the steam is output into the high-pressure processor for pressurization, and the obtained high-pressure steam is output into the turbine generator to drive the turbine to rotate for power generation. Through setting up hot working medium storage device and storing first hot working medium, can reduce the loss of heat energy in the working medium transmission process, to steam pressurization, can improve the rotational speed of steam turbine to improve the efficiency of electricity generation. In addition, the geothermal energy utilization system also comprises a heat exchange component, the first thermal working medium forms a second thermal working medium after heat exchange in the steam generator, and the second thermal working medium is output to the component for heat exchange, so that heat energy is provided for external equipment, secondary utilization of geothermal energy is realized, heat energy loss is reduced, and energy utilization rate is improved.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings:
referring to fig. 1, a geothermal energy utilization system 100 according to an embodiment of the present application includes a cold medium tank 110, a geothermal well 120, a hot medium storage 130, a steam generator 140, a high pressure processor 150, and a turbo generator 160.
The cold working medium tank 110 is used for storing cold working medium, the cold working medium tank 110 is communicated with the geothermal well 120, and the cold working medium in the cold working medium tank 110 is output to the geothermal well 120 for heat exchange to form a first thermal working medium.
The geothermal well 120 is in communication with the thermal working fluid storage 130, and outputs a first thermal working fluid in the geothermal well 120 to the thermal working fluid storage 130.
The thermal working medium storage device 130 is communicated with the steam generator 140, and the first thermal working medium in the thermal working medium storage device 130 is output to the steam generator 140 for heat exchange, so that liquid water in the steam generator 140 is evaporated into steam.
The steam generator 140 communicates with the high pressure processor 150, and the steam in the steam generator 140 is output to the high pressure processor 150 for pressurization.
The high-pressure processor 150 is communicated with the turbo generator 160, so that the steam in the high-pressure processor 150 is output to the turbo generator 160 to drive the turbo generator 160 to generate electricity.
It should be noted that, the cold working medium stored in the cold working medium tank 110 may be different fluids such as water, molten salt, nano fluid, etc., and geothermal energy is stored in a stratum having permeability in deep underground, and as the depth increases, the temperature of underground also increases, so that the cold working medium with different melting points and boiling points needs to be selected according to the depth of the geothermal well 120 and the temperature of underground, thereby improving the applicability of the geothermal energy utilization system. In addition, the process of delivering the working fluid selects whether to install the cold working fluid pump or the hot working fluid pump for auxiliary delivery at the delivery pipe according to the positional relationship among the cold working fluid tank 110, the geothermal well 120, the hot working fluid storage 130 and the steam generator 140, which is not limited in the present application.
In particular implementations, geothermal well 120 may be retrofitted with a abandoned oil well having available geothermal energy, thereby reducing the construction costs of the geothermal energy utilization system. The geothermal energy utilization system of the present application comprises a plurality of geothermal wells 120, a cold working fluid tank 110 is communicated with each geothermal well 120, and a cold working fluid is extracted from the cold working fluid tank 110 by a cold working fluid pump and outputted to each geothermal well 120. The first thermal working medium may need to be conveyed to the steam generator 140 through a long distance, each geothermal well 120 is communicated with the same thermal working medium storage device 130, the geothermal wells 120 and the thermal working medium storage devices 130 are relatively close in position distance, after the first thermal working medium in each geothermal well 120 is conveyed to the thermal working medium storage device 130, the first thermal working medium is conveyed to the steam generator 140 through the thermal working medium storage device 130, heat energy loss in a conveying pipeline in the long-distance conveying process of the first thermal working medium can be reduced, and the utilization rate of geothermal energy is improved.
Specifically, a temperature control valve may be disposed at a pipe for outputting the first thermal medium in the geothermal well 120, after the cold medium in the cold medium tank 110 is output into the geothermal well 120, the temperature of the cold medium gradually rises to form the first thermal medium, and when the temperature control valve detects that the temperature of the medium in the geothermal well 120 is greater than or equal to a preset temperature, the temperature control valve is opened, and the first thermal medium is output into the thermal medium storage device 130. Thereby, the temperature of the first thermal working medium output to the steam generator 140 can be ensured, and the power generation efficiency can be ensured.
In addition, since the temperature in the geothermal well 120 is constant, the temperature does not change after the working medium exchanges heat in the geothermal well 120 for a period of time, the valve at the pipeline of the geothermal well 120 outputting the first thermal working medium can also be a timing valve, the timing valve starts timing after the cold working medium is output to the geothermal well 120, and the valve is automatically opened after a preset period of time, so that the temperature of the first thermal working medium is controlled in such a way that the energy utilization rate and the power generation efficiency are improved.
In the present application, the effect of generating electricity using geothermal energy is achieved by converting geothermal energy into mechanical energy and converting the mechanical energy into electrical energy by the steam generator 140 and the high pressure processor 150. The steam generated in the steam generator 140 is pressurized by the high-pressure processor 150 and then output to the steam turbine generator 160 to drive the steam turbine generator 160 to generate electricity, so that the rotating speed of the steam turbine can be increased, and the electricity generation efficiency is improved.
In some implementations, referring to fig. 1 and 3, the steam generator 140 according to the embodiment of the present application includes a first heating member 141 and a steam generating member 142, and the first heating member 141 is used to raise the temperature of the steam generating member 142 so as to evaporate liquid water in the steam generating member 142 into steam.
The first heating element 141 is in communication with the thermal working medium storage device 130, so that the first thermal working medium is output from the thermal working medium storage device 130 to the first heating element 141, and the first thermal working medium exchanges heat in the first heating element 141 to form a second thermal working medium.
The first steam output port 1421 of the steam generating part 142 communicates with the high pressure processor 150 so that the steam in the steam generating part 142 is output to the high pressure processor 150.
In the present application, the steam generator 140 includes a first heating element 141 and a steam generating element 142, wherein liquid water is stored in the steam generating element 142, after the first thermal working medium is input into the first heating element 141, the first heating element 141 heats the water in the steam generating element 142, the water is heated and evaporated into steam, and meanwhile, the temperature of the existing steam in the steam generating element 142 can be increased, part of heat energy of the first thermal working medium is transferred into the steam, so that the first utilization of geothermal energy is realized, and the temperature of the first thermal working medium is reduced to form a second thermal working medium.
In a specific implementation, after steam is generated in the steam generating element 142, the steam is delivered to the high-pressure processor through the first steam output port 1421 for pressurization treatment, so that the steam is more suitable for power generation, and the steam power generation efficiency is improved.
In some possible implementations, referring to fig. 1 and 3, the steam in the turbo generator 160 drives the turbo generator 160 to generate liquid water, and the second water output 161 of the turbo generator 160 is communicated with the first water input 1422 of the steam generating element 142, so that the water in the turbo generator 160 is output to the steam generating element 142.
It should be noted that, the lower end of the turbo generator 160 is provided with the second water outlet 161, when the high pressure steam drives the turbo generator 160 to generate electricity, part of the steam is cooled into liquid water, the liquid water enters the steam generating part 142 through the second water outlet 161 and the first water inlet 1422, and waits for the first heating part 141 to heat to form steam again, so as to realize recycling of water resources, thereby being beneficial to saving resources and reducing the electricity generation cost of the geothermal energy utilization system 100.
In some possible implementations, referring to fig. 1, 2 and 3, the geothermal energy utilization system 100 according to the embodiment of the present application further includes a heat exchange assembly 170, where the heat exchange assembly 170 is configured to provide heat energy to an external device, the heat exchange assembly 170 includes at least two heat exchangers 171, the heat exchangers 171 include a second heating element 1711 and a heating element 1712, the second heating element 1711 is configured to raise a temperature of the heating element 1712, and the second heating elements 1711 of the heat exchangers 171 are sequentially connected.
The first heating element 141 is communicated with the second heating element 1711, so that the second thermal working medium is output from the first heating element 141 to the second heating element 1711 for heat exchange to form a cold working medium, and the second heating element 1711 is communicated with the cold working medium tank 110, so that the cold working medium is output from the second heating element 1711 to the cold working medium tank 110.
In the present application, the heat exchange assembly 170 may enable the secondary use of geothermal energy. The heat exchange assembly 170 is composed of at least two heat exchangers 171, the heat exchangers 171 include a second heating member 1711 and a heating member 1712, and liquid water is stored in the heating member 1712. The second heat working medium flows through the second heating parts 1711 of the heat exchangers 171 in sequence after being output from the first heating parts 141, so that the heat energy in the second heat working medium is transferred to the liquid water in the heating parts 1712 of the heat exchangers 171, the temperature of the water is increased, the temperature of the second heat working medium is continuously reduced, and after the cold working medium is finally formed, the cold working medium is conveyed into the cold working medium tank 110, so that the recycling is realized, the geothermal energy utilization cost is reduced, and meanwhile, the geothermal energy loss is reduced and the energy utilization rate is improved through the utilization of the heat energy of the second heat working medium.
In a specific implementation, the heating element 1712 is connected to an external device, such as a radiator, floor radiant heating, etc., and delivers water with a higher temperature to the external device, thereby providing heat energy for a user, and recovering and re-heating the water with a reduced temperature for recycling.
In some possible manners, referring to fig. 1 and 3, the high-pressure processor 150 of the embodiment of the present application is in communication with the second steam input port 162 of the turbo generator 160, and outputs steam to the turbo generator 160 to drive the turbo generator 160 to generate electricity, the second steam output port 163 of the turbo generator 160 is in communication with the third steam input port 1712a of the heating element 1712, so that the steam remaining after the steam generator 160 is driven to generate electricity is output to the heating element 1712, the third water output port 1712b of the heating element 1712 is in communication with the first water input port 1422 of the steam generating element 142, and the steam in the heating element 1712 is cooled to liquid water and then output to the steam generating element 142.
It should be noted that, after the high-pressure steam enters the turbo generator 160 to drive the turbo generator 160 to generate electricity, part of the steam is cooled into liquid water, and part of the steam is still in a gaseous state, and the steam still has a certain heat energy at this time. The rest steam is delivered to the heating element 1712 through the second steam output port 163 and the third steam input port 1712a, and is subjected to heat exchange with water in the heating element 1712, the steam is cooled into liquid water, at this time, the liquid water in the heating element 1712 is increased, the rest liquid water can be output through the third steam output port 1712b and is input into the steam generating element 142 through the first water input port 1422, so that the water in the steam generator 140 is recycled, and the geothermal energy utilization cost is saved. Meanwhile, by fully utilizing the heat energy remained in the steam, the geothermal energy utilization rate of the geothermal energy utilization system 100 is further improved, and the energy loss is reduced.
In some implementations, referring to fig. 1, the thermal working medium storage device 130 according to the embodiment of the present application is a thermal working medium tank 131.
When the thermal medium storage device 130 is specifically implemented, the thermal medium tank 131 may be made of a thermal insulation material, and the thermal medium tank 131 has a large capacity, and can simultaneously accommodate the first thermal medium formed in the plurality of geothermal wells 120, thereby playing a transitional role in the geothermal energy utilization system and reducing thermal energy loss caused by long-distance transportation of the first thermal medium.
In some implementations, referring to fig. 4, the thermal medium storage device 130 of an embodiment of the present application is a thermal mass seal well 132.
In particular implementations, the thermal medium storage device 130 may be a thermal mass seal well 132, and the thermal mass seal well 132 may be retrofitted with a abandoned oil well to reduce the construction costs of the geothermal energy utilization system.
In some implementations, referring to fig. 4 and 5, mechanical wheels 1321, steel strands 1322, and blocks 1323 are disposed within the thermal mass seal well 132 of an embodiment of the present application.
The object block 1323 is abutted against the inner side wall of the thermal mass seal well 132, one end of the steel stranded wire 1322 is connected with the object block 1323, the other end of the steel stranded wire 1322 is connected with the mechanical wheel 1321, and the mechanical wheel 1321 rotates when the object block 1323 ascends to enable the steel stranded wire 1322 to be wound on the periphery side of the mechanical wheel 1321.
The mechanical wheel 1321 is connected to the mechanical generator 180, and when the object block 1323 descends, the object block 1323 drives the mechanical wheel 1321 to rotate through the steel stranded wire 1322, so as to drive the mechanical generator 180 to generate electricity.
It should be noted that, the material block 1323 may be selected from materials with a melting point higher than the temperature of the first thermal working medium according to the temperature of the first thermal working medium. The outer sidewall of the mass 1323 is in close proximity to the inner sidewall of the thermal mass seal well 132 to ensure that when a first thermal medium is input into the thermal mass seal well 132, the first thermal medium cannot flow out of the gap between the mass 1323 and the thermal mass seal well 132, the first thermal medium always being located below the mass 1323. The outer sidewall of the mass 1323 and the inner sidewall of the thermal mass seal well 132 are smooth surfaces to ensure that the mass 1323 can slide smoothly within the thermal mass seal well 132.
In a specific implementation, the mechanical wheel 1321 may be connected to a motor, the motor may drive the mechanical wheel 1321 to rotate, and when the object 1323 moves upwards, the steel strand 1322 is in a loose state and is not under the action of a tensile force, and the mechanical wheel 1321 bundles the steel strand 1322, so that the steel strand 1322 is wound around the circumference of the mechanical wheel 1321; when the object 1323 descends under the action of gravity, the object 1323 applies a pulling force to the steel strand 1322, and the steel strand 1322 drives the mechanical wheel 1321 to rotate in the opposite direction of the steel strand 1322, so that the mechanical wheel 1321 rotates to drive the mechanical generator 180 to generate electricity. Therefore, gravitational potential energy is converted into electric energy, and the energy utilization rate is improved. The mechanical generator 180 can supply power to the electric equipment in the geothermal energy utilization system 100 while supplying power to the external equipment, so that long-distance external transmission of electric energy is reduced, and the in-situ consumption rate of the electric energy is improved.
In some implementations, referring to fig. 4 and 5, a working fluid input port 1324 and a working fluid output port 1325 of a thermal mass seal well 132 of an embodiment of the present application are located at the bottom of the thermal mass seal well 132.
The first thermal medium in geothermal well 120 is output to thermal mass seal well 132 and mass 1323 is extruded up; after the first thermal medium output in the thermal mass seal well 132, the mass 1323 is lowered by gravity.
In the present application, the working medium input port 1324 and the working medium output port 1325 are both disposed at the bottom of the thermal mass seal well 132, so as to ensure that the first thermal working medium is located below the mass 1323, and avoid the first thermal working medium applying downward pressure to the mass 1323. The first thermal working medium is acted by gravity to make the first thermal working medium enter the thermal mass sealing well 132 from the bottom of the thermal mass sealing well 132, upward force is applied to the object block 1323 to enable the object block 1323 to move upward, gravitational potential energy is generated, after the first thermal working medium is output, the object block 1323 is lowered under the action of gravity, the gravitational potential energy is converted into kinetic energy, the mechanical wheel 1321 is driven to rotate, and accordingly the mechanical generator 180 is driven to generate electricity, and the kinetic energy is converted into electric energy. Thereby, the gravitational potential energy can be stored and utilized, and the energy utilization rate and the power generation efficiency of the geothermal energy utilization system 100 can be further improved.
In some implementations, referring to fig. 5, a check valve 1326 is installed at each of the working fluid inlet 1324 and the working fluid outlet 1325 of the thermal mass seal well 132 of an embodiment of the present application.
In the present application, the check valve 1326 is installed to effectively avoid the first thermal medium in the thermal mass seal well 132 from flowing backward due to the gravity of the first thermal medium and the pressure of the mass 1323, which causes damage to the geothermal energy utilization system 100, and simultaneously ensure the function of storing the first thermal medium in the thermal mass seal well 132.
In describing embodiments of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly coupled, indirectly coupled through an intermediary, in communication between two elements, or in an interaction relationship between two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
The embodiments of the application may be implemented or realized in any number of ways, including as a matter of course, such that the apparatus or elements recited in the claims are not necessarily oriented or configured to operate in any particular manner. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless specifically stated otherwise.
The terms first, second, third, fourth and the like in the description and in the claims and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be capable of being practiced otherwise than as specifically illustrated and described.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The term "plurality" herein refers to two or more.
It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application.
It should be understood that, in the embodiment of the present application, the sequence number of each process does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present application.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (10)
1. The geothermal energy utilization system is characterized by comprising a cold working medium tank, a geothermal well, a hot working medium storage device, a steam generator, a high-pressure processor and a turbo generator;
the cold working medium tank is used for storing cold working medium, is communicated with the geothermal well and outputs the cold working medium in the cold working medium tank to the geothermal well for heat exchange to form a first thermal working medium;
the geothermal well is communicated with the thermal working medium storage device, and the first thermal working medium in the geothermal well is output to the thermal working medium storage device;
the first thermal working medium in the thermal working medium storage device is output to the steam generator for heat exchange, so that liquid water in the steam generator is evaporated into steam;
the steam generator is communicated with the high-pressure processor, and the steam in the steam generator is output to the high-pressure processor for pressurization;
and the high-pressure processor is communicated with the steam turbine generator, so that steam in the high-pressure processor is output to the steam turbine generator to drive the steam turbine generator to generate power.
2. A geothermal energy utilizing system according to claim 1 wherein the steam generator comprises a first heating element and a steam generating element, the first heating element being adapted to raise the temperature of the steam generating element to evaporate liquid water in the steam generating element into steam;
the first heating piece is communicated with the thermal working medium storage device, so that the first thermal working medium is output from the thermal working medium storage device to the first heating piece, and the first thermal working medium exchanges heat in the first heating piece to form a second thermal working medium;
the first steam output port of the steam generating part is communicated with the high-pressure processor, so that steam in the steam generating part is output to the high-pressure processor.
3. The geothermal energy utilization system of claim 2, wherein the steam in the turbo generator drives the turbo generator to generate the liquid water, and wherein the second water output port of the turbo generator is in communication with the first water input port of the steam generator to output the water in the turbo generator to the steam generator.
4. A geothermal energy utilizing system according to claim 3 further comprising a heat exchange assembly for providing thermal energy to an external device, the heat exchange assembly comprising at least two heat exchangers, the heat exchangers comprising a second heating element and a heating element, the second heating element being for increasing the temperature of the heating element, the second heating elements of each heat exchanger being in turn in communication;
the first heating piece is communicated with the second heating piece, so that the second heat working medium is output from the first heating piece to the second heating piece for heat exchange to form the cold working medium, and the second heating piece is communicated with the cold working medium tank, so that the cold working medium is output from the second heating piece to the cold working medium tank.
5. The geothermal energy utilization system of claim 4, wherein the high pressure processor is in communication with a second steam input of the turbo generator and outputs steam to the turbo generator to drive the turbo generator to generate electricity, the second steam output of the turbo generator is in communication with a third steam input of the heating element so that steam remaining after the turbo generator generates electricity is output to the heating element, a third water output of the heating element is in communication with the first water input of the steam generating element, and the steam in the heating element is cooled to liquid water and then output to the steam generating element.
6. A geothermal energy utilizing system according to any one of claims 1 to 5 wherein the thermal working fluid storage is a thermal working fluid tank.
7. A geothermal energy utilizing system according to any one of claims 1 to 5 wherein the thermal medium storage is a thermal mass seal well.
8. The geothermal energy utilizing system of claim 7, wherein the thermal mass seal well is provided with mechanical wheels, steel strands and blocks;
the object block is abutted to the inner side wall of the thermal mass sealing well, one end of the steel strand is connected with the object block, the other end of the steel strand is connected with the mechanical wheel, and the mechanical wheel rotates when the object block ascends to enable the steel strand to be wound on the periphery of the mechanical wheel;
the mechanical wheel is connected with the mechanical generator, and when the object blocks descend, the object blocks drive the mechanical wheel to rotate through the steel stranded wires, so that the mechanical generator is driven to generate electricity.
9. The geothermal energy utilizing system of claim 8, wherein the working fluid input and output of the thermal mass seal well are located at a bottom of the thermal mass seal well;
outputting the first thermal working medium in the geothermal well to the thermal mass seal well, wherein the object block is extruded and lifted; after the first thermal medium in the thermal mass seal well is output, the mass is lowered by gravity.
10. The geothermal energy utilizing system of claim 9, wherein the thermal mass seal well has a check valve mounted at both the working fluid inlet and the working fluid outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310927986.6A CN116717925A (en) | 2023-07-26 | 2023-07-26 | Geothermal energy utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310927986.6A CN116717925A (en) | 2023-07-26 | 2023-07-26 | Geothermal energy utilization system |
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| CN116717925A true CN116717925A (en) | 2023-09-08 |
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| CN202310927986.6A Pending CN116717925A (en) | 2023-07-26 | 2023-07-26 | Geothermal energy utilization system |
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| Country | Link |
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| CN (1) | CN116717925A (en) |
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