A geothermal system exploitation simulation device

Abstract

The present invention provides a simulation device for geothermal system exploitation, which includes a geological model, a monitoring system, a rainfall system, a water flow control system, a heating system and an exploitation system; the geological model includes a seepage tank, a rock layer arranged in the seepage tank and a soil layer arranged on the rock layer; the rock layer includes several rocks, and gaps are formed between adjacent rocks; both sides of the seepage tank are respectively communicated with the water flow control system; the monitoring system includes monitoring elements and a data acquisition unit, monitoring holes are arranged on the tank wall of the seepage tank, monitoring elements are arranged in the monitoring holes, and the monitoring elements are electrically connected with the data acquisition unit; the exploitation system is arranged on the soil layer and penetrates through the soil layer to be communicated with the gaps of the rock layer; the rainfall system is arranged above the exploitation system; the heating system is arranged at the bottom of the seepage tank. The present invention effectively simulates the exploitation situation of the fractured geothermal system based on the temperature field and the flow field, and has important significance for the development and research of the fractured geothermal water system.

Description

Technical Field

[0001] The present invention relates to the technical field of physical simulation experimental devices, and particularly relates to a simulation device for geothermal system exploitation. Background Art

[0002] In today's society, energy has become the key to national development. The extensive use of fossil energy will lead to serious environmental problems, which have become a severe challenge faced by the whole world. Geothermal energy, with the characteristics of environmental protection, good stability, and recyclability, is a practical and competitive renewable energy source.

[0003] In China, the reserves of medium and deep geothermal resources in groundwater are huge, accounting for about 1 / 6 of the global total. As an important part of guiding the efficient development of geothermal resources, the current conceptual model in the exploitation process of geothermal water systems is not yet perfect; especially in fractured geothermal water systems, since the fractures cut deep into the ground and these fractures are usually the dominant channels for geothermal water migration, the coupling effect between the temperature field and the flow field (i.e., the place where water flows) is very obvious due to the increase in heat source temperature and the limitation of the flow field. However, the existing simulation devices do not consider the coupling effect between the temperature field and the flow field, which has a great impact on the development of fractured geothermal systems and is likely to cause a large deviation between the simulated exploitation and the actual exploitation results.

[0004] In summary, there is an urgent need for a simulation device for geothermal system exploitation to solve the problems existing in the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a simulation device for geothermal system exploitation, aiming to solve the problem that the prior art does not consider the coupling effect between the temperature field and the flow field, resulting in a large deviation between the simulated exploitation and the actual exploitation results. The specific technical solutions are as follows:

[0006] A simulation device for geothermal system exploitation includes a geological model, a monitoring system, a rainfall system, a water flow control system, a heating system, and an exploitation system;

[0007] The geological model includes a seepage tank, a rock layer arranged in the seepage tank, and a soil layer arranged on the rock layer; the rock layer includes several rocks, and gaps for water supply flow are formed between adjacent rocks; both sides of the seepage tank are respectively communicated with the water flow control system; the monitoring system includes several monitoring elements and a data acquisition unit. Monitoring holes are arranged on the tank wall of the seepage tank, monitoring elements are arranged in the monitoring holes, and the monitoring elements are electrically connected to the data acquisition unit; the exploitation system is arranged on the soil layer and is communicated with the gap pipeline of the rock layer through the soil layer; the rainfall system is arranged above the exploitation system and is used to simulate natural rainfall; the heating system is arranged at the bottom of the seepage tank and is used to simulate natural underground heat sources.

[0008] Preferably, the monitoring elements include a temperature sensor and a pressure sensor; a plurality of temperature sensors and a plurality of pressure sensors are respectively arranged on the monitoring holes and are both electrically connected to the data acquisition unit.

[0009] Preferably, the data acquisition unit includes a temperature monitor and a water pressure monitor; the temperature sensor is electrically connected to the temperature monitor; the pressure sensor is electrically connected to the water pressure monitor.

[0010] Preferably, the mining system includes a water pump and a flow meter. The water inlet of the water pump is connected to the rock layer gap through a pipeline for pumping water in the gap; the water outlet of the water pump is connected to an external water source pipeline; a valve one is arranged on the pipeline at the water inlet of the water pump; a flow meter is arranged at the water outlet of the water pump.

[0011] Preferably, it further includes a surrounding rock system. The surrounding rock system includes robotic arms. A plurality of robotic arms are arranged between the tank wall of the seepage tank and the rock layer, and the robotic arms are used to apply pressure to the rocks in the rock layer.

[0012] Preferably, the rainfall system includes a rain shower and a water supply pipeline. The water supply pipeline is erected above the seepage tank. A plurality of rain showers are connected to the water supply pipeline, and a valve two for controlling the rainfall amount is arranged between the water supply pipeline and the rain shower.

[0013] Preferably, the water flow control system includes two water flow control units. The two water flow control units are respectively arranged on both sides of the seepage tank and are both connected to the seepage tank; the water flow control unit includes a water tank, a hose and a lifting platform. The water tank is connected to the seepage tank through the hose and a communicating vessel is formed between them. The water tank is arranged on the lifting platform.

[0014] Preferably, the heating system includes a power supply, a heating tank, a heating rod and a heat source body. The heating rod is arranged in the heating tank and is connected to the power supply; the heat source body is arranged between the bottom of the seepage tank and the rock layer for heating the rock layer; the heating tank is arranged outside the seepage tank and is connected to the heat source body through a pipeline; heating liquid is filled in both the heating tank and the heat source body.

[0015] Preferably, it further includes a control system. The control system is electrically connected to the temperature monitor, the water pressure monitor, the water pump, the flow meter, the valve one, the robotic arm, the valve two, the lifting platform and the electric heating rod respectively. The control system is used to control the working states of the temperature monitor, the water pressure monitor, the water pump, the flow meter, the valve one, the robotic arm, the valve two, the lifting platform and the electric heating rod.

[0016] Preferably, the control system is a host computer.

[0017] Applying the technical solution of the present invention has the following beneficial effects:

[0018] The present invention simulates and constructs a real geothermal system exploitation simulation device in a seepage tank, and sets up a geological model to simulate the fractured geological conditions; the adopted water flow control system can freely control the water head in the seepage tank, can set different test conditions at any time, and simulate different field situations; the rainfall system can set experimental situations under different rainfall conditions; the heating system at the bottom of the seepage tank can effectively simulate natural underground heat sources; the monitoring system can measure the data changes during the exploitation of underground hot water; the exploitation system can restore various actual working conditions. The present invention effectively simulates the exploitation situation of the fractured geothermal system based on the coupling effect of the temperature field and the flow field, and has important significance for the development research of the fractured geothermal water system.

[0019] In addition to the purposes, features and advantages described above, the present invention has other purposes, features and advantages. The following will refer to the drawings to further elaborate on the present invention in detail. Brief Description of the Drawings

[0020] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0021] Figure 1 is the overall structural schematic diagram of the geothermal system exploitation simulation device in the preferred Embodiment 1 of the present invention;

[0022] Figure 2 is Figure 1 the structural schematic diagram of another angle of the geothermal system exploitation simulation device in;

[0023] Among them, 1 - seepage tank, 2 - monitoring hole, 3 - temperature sensor, 4 - pressure sensor, 5 - temperature monitor, 6 - water pressure monitor, 7 - water pump, 8 - flowmeter, 9 - valve one, 10 - rainfall device, 11 - valve two, 12 - water supply pipeline, 13 - water tank, 14 - heating tank, 15 - heating rod, 16 - heat source body, 17 - robotic arm, 18 - control system. Detailed Description of the Specific Embodiments

[0024] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below, and preferred embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure content of the present invention more thorough and comprehensive.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention.

[0026] Embodiment 1:

[0027] Refer to Figure 1-2 , a simulation device for geothermal system exploitation, comprising a geological model, a monitoring system, a rainfall system, a water flow control system, a heating system, an exploitation system, a surrounding rock system, and a control system 18;

[0028] The geological model includes a seepage tank 1, a rock layer arranged in the seepage tank 1, and a soil layer arranged on the rock layer; the rock layer includes several rocks, and gaps (i.e., flow fields) for water supply flow are formed between adjacent rocks.

[0029] The monitoring system includes several monitoring elements and a data acquisition unit. Monitoring holes 2 are arranged on the tank wall of the seepage tank 1. The monitoring elements include a temperature sensor 3 and a pressure sensor 4; a plurality of temperature sensors 3 and a plurality of pressure sensors 4 are respectively arranged on the monitoring holes 2. The data acquisition unit includes a temperature monitor 5 and a water pressure monitor 6; the temperature sensor 3 is electrically connected to the temperature monitor 5; the pressure sensor 4 is electrically connected to the water pressure monitor 6.

[0030] The exploitation system includes a water pump 7 and a flowmeter 8. The water inlet of the water pump 7 is respectively connected to the gaps in the rock layer through four pipelines for pumping the water in the gaps; the water outlet of the water pump 7 is connected to an external water source pipeline, and the water in the gaps is pumped to the external water source through the water pump 7; valves 9 are arranged on the four pipelines at the water inlet of the water pump 7; a flowmeter 8 is arranged at the water outlet of the water pump 7. The exploitation flow of a single pipeline is controlled by controlling the valve 9, and the total exploitation flow is collected through the flowmeter 8.

[0031] The surrounding rock system includes robotic arms 17 (product model: Dobot MG400). A plurality of robotic arms 17 are arranged between the tank wall of the seepage tank 1 and the rock layer. The robotic arms 17 are used to apply pressure to the rocks in the rock layer. By the robotic arms 17, the gaps between the rocks are changed, thereby simulating different flow fields.

[0032] The rainfall system includes a rain shower 10 (a sprinkler head in this embodiment) and a water supply pipe 12. The water supply pipe 12 is erected above the seepage tank 1. A plurality of the rain showers 10 are communicated with the water supply pipe 12. A valve two 11 for controlling the rainfall amount is arranged between the water supply pipe 12 and the rain shower 10. By adjusting the valve two 11, the rainfall intensity, rainfall area, rainfall duration, etc. can be controlled. The rainfall simulates natural rainfall, thereby simulating geothermal exploitation under different weather conditions.

[0033] The water flow control system includes two water flow control units, which are respectively arranged on both sides of the seepage tank 1 and are both communicated with the seepage tank 1. The water flow control unit includes a water tank 13, a hose and a lifting platform. The water tank 13 is communicated with the seepage tank 1 through the hose, and a communicating vessel is formed between the two. The water tank 13 is arranged on the lifting platform. By controlling the heights of the water tanks 13 on both sides of the seepage tank 1, the water head in the seepage tank 1 can be adjusted. In this embodiment, a partition is arranged in the water tank. The partition divides the water tank to form a first water storage chamber and a second water outlet chamber. The first water storage chamber is communicated with the seepage tank through the hose, and a communicating vessel is formed between the two. The top of the first water storage chamber and the second water storage chamber are communicated. The second water storage chamber is provided with a drain hole. When the first water storage chamber is filled with water, the water flows into the second water storage chamber through the top channel thereof and is discharged through the drain hole.

[0034] The heating system includes a power supply, a heating tank 14, a heating rod 15 and a heat source body 16. The heating rod 15 is arranged in the heating tank 14 and is connected to the power supply. The heat source body 16 is arranged between the bottom of the seepage tank 1 and the rock layer for heating the rock layer. The heating tank 14 is arranged outside the seepage tank 1 and is communicated with the heat source body 16 through a pipeline. Both the heating tank 14 and the heat source body 16 are filled with a heating liquid. By the heating system, a natural underground heat source is simulated. After starting heating, the heated heating liquid in the heating tank moves to the heat source body through the pipeline by thermal movement.

[0035] The control system 18 is electrically connected to the temperature monitor 5, the water pressure monitor 6, the water pump 7, the flowmeter 8, the valve one 9, the robotic arm 17, the valve two 11, the lifting platform and the electric heating rod respectively. The control system 18 is used to control the working states of the temperature monitor 5, the water pressure monitor 6, the water pump 7, the flowmeter 8, the valve one 9, the robotic arm 17, the valve two 11, the lifting platform and the electric heating rod. Specifically, the control system is used to collect the temperature, water pressure and flow data of the temperature monitor 5, the water pressure monitor 6 and the flowmeter 8, and is also used to control the start and stop of the water pump 7, the valve one 9, the robotic arm 17, the valve two 11, the lifting platform and the electric heating rod.

[0036] In this embodiment, the control system 18 is a host computer.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A geothermal system exploitation simulation device, characterized in that, It includes a geological model, a monitoring system, a rainfall system, a water flow control system, a heating system, and a mining system; The geological model includes a seepage tank (1), a rock layer disposed within the seepage tank (1), and a soil layer disposed on the rock layer; the rock layer includes a number of rocks, and gaps for water flow are formed between adjacent rocks; both sides of the seepage tank (1) are respectively connected to the water flow control system; the monitoring system includes a number of monitoring elements and a data acquisition unit, monitoring holes (2) are provided on the tank wall of the seepage tank (1), monitoring elements are provided within the monitoring holes (2), and the monitoring elements are electrically connected to the data acquisition unit; the mining system is disposed on the soil layer and penetrates the soil layer to be connected to the gap pipeline of the rock layer; the rainfall system is disposed above the mining system for simulating natural rainfall; the heating system is disposed at the bottom of the seepage tank (1) for simulating natural underground heat sources; The mining system includes a water pump (7) and a flow meter (8), the water inlet of the water pump (7) is connected to the rock layer gap through a pipeline for pumping water in the gap; the water outlet of the water pump (7) is connected to an external water source pipeline; a valve one (9) is provided on the pipeline at the water inlet of the water pump (7); a flow meter (8) is provided at the water outlet of the water pump (7); It further includes a surrounding rock system, the surrounding rock system includes a robotic arm (17), and a plurality of robotic arms (17) are provided between the tank wall of the seepage tank (1) and the rock layer, and the robotic arm (17) is used for applying pressure to the rocks in the rock layer.

2. The geothermal system exploitation simulation device according to claim 1, characterized in that, The monitoring elements include a temperature sensor (3) and a pressure sensor (4); a plurality of temperature sensors (3) and a plurality of pressure sensors (4) are respectively provided on the monitoring holes (2) and are both electrically connected to the data acquisition unit.

3. The geothermal system exploitation simulation device according to claim 2, characterized in that The data acquisition unit includes a temperature monitor (5) and a water pressure monitor (6); the temperature sensor (3) is electrically connected to the temperature monitor (5); the pressure sensor (4) is electrically connected to the water pressure monitor (6).

4. The geothermal system exploitation simulation device according to claim 3, wherein The rainfall system includes a rain shower (10) and a water supply pipeline (12), the water supply pipeline (12) is erected above the seepage tank (1), a plurality of the rain showers (10) are connected to the water supply pipeline (12), and a valve two (11) for controlling the rainfall amount is provided between the water supply pipeline (12) and the rain shower (10).

5. The geothermal system exploitation simulation device according to claim 4, characterized in that The water flow control system includes two water flow control units, the two water flow control units are respectively provided on both sides of the seepage tank (1) and are both connected to the seepage tank (1); the water flow control unit includes a water tank (13), a hose, and a lifting platform, the water tank (13) is connected to the seepage tank (1) through the hose and a communicating vessel is formed therebetween, and the water tank (13) is provided on the lifting platform.

6. The geothermal system exploitation simulation device according to claim 5, wherein, The heating system includes a power supply, a heating tank (14), heating rods (15), and a heat source body (16). The heating rods (15) are arranged in the heating tank (14) and connected to the power supply. The heat source body (16) is arranged between the bottom of the seepage tank (1) and the rock layer for heating the rock layer. The heating tank (14) is arranged outside the seepage tank (1) and is connected to the heat source body (16) through a pipeline. Heating liquid is filled in both the heating tank (14) and the heat source body (16).

7. The geothermal system exploitation simulation device according to claim 6, characterized in that, It further includes a control system (18). The control system (18) is electrically connected to a temperature monitor (5), a water pressure monitor (6), a water pump (7), a flowmeter (8), a first valve (9), a robotic arm (17), a second valve (11), a lifting platform, and an electric heating rod respectively. The control system (18) is used to control the working states of the temperature monitor (5), the water pressure monitor (6), the water pump (7), the flowmeter (8), the first valve (9), the robotic arm (17), the second valve (11), the lifting platform, and the electric heating rod.

8. The geothermal system exploitation simulation device according to claim 7, characterized in that, The control system (18) is a host computer.

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