Geothermal energy power generation system of medium-deep geothermal well

Abstract

The invention discloses a geothermal energy power generation system of a middle-deep layer geothermal well, and belongs to the technical field of geothermal energy. The power generation system is connected with the geothermal well; the power generation system comprises a first separation mechanism, a second separation mechanism and a third separation mechanism. The first separation mechanism is arranged in a box body, and the box body is connected with a geothermal well through a pipeline; the second separation mechanism is arranged in the box body and is positioned above the first separation mechanism; the third separation mechanism is connected with the top of the box body through a pipeline; according to the geothermal power generation system, geothermal energy can be used for generating power through the arranged power generation system, so that waste of the geothermal energy when a geothermal well is idle is avoided, gas-liquid separation is conducted on the geothermal water through the arranged three-stage separation mechanism during power generation, steam is separated from the geothermal water to the maximum extent for power generation, and therefore the efficiency of geothermal power generation is improved; therefore, the utilization of geothermal energy is improved.

Description

Technical Field

[0001] The present invention relates to the field of geothermal energy technology, and in particular to a geothermal energy power generation system for a mid-deep geothermal well. Background Art

[0002] The utilization of geothermal energy is mainly concentrated in winter heating and geothermal power generation. Existing geothermal power generation mainly extracts high-temperature geothermal water into the heat exchange equipment on the ground, heats the working fluid in the heat exchange equipment through heat exchange to change the working fluid into gas, and uses the gaseous working fluid to drive the impeller of the power generation equipment to rotate, thereby realizing the power generation process.

[0003] However, the current heat exchange process has a low utilization rate of geothermal energy, mainly because most of the heat energy is not used and flows back into the geothermal well with the geothermal water, resulting in low efficiency in using geothermal energy to generate electricity and failure to achieve high-efficiency power generation. Summary of the invention

[0004] In order to solve the problems of the prior art, the present invention provides a geothermal power generation system for a medium-deep geothermal well, comprising: a geothermal well;

[0005] A power generation system, the power generation system is connected to the geothermal well and is used to convert geothermal energy into electrical energy and store it;

[0006] The power generation system comprises: a first separation mechanism, a second separation mechanism and a third separation mechanism;

[0007] The first separation mechanism is disposed in a box body, and the box body is connected to a geothermal well through a pipeline, and is used to spray geothermal water out from the first separation mechanism in an atomized state;

[0008] The second separation mechanism is disposed in the box body and located above the first separation mechanism, and is used to perform a first gas-liquid separation process on the steam separated by the first separation mechanism;

[0009] The third separation mechanism is connected to the top of the box through a pipeline, and is used to perform a second separation process on the steam separated by the second separation mechanism, and send the separated steam to the steam turbine unit through the pipeline to generate electricity.

[0010] Furthermore, the geothermal wells include: medium-deep geothermal wells and shallow geothermal wells;

[0011] The medium-deep geothermal well and the shallow geothermal well are connected to the box through pipelines to form a loop, and valves and geothermal water circulation pumps are installed on the pipelines.

[0012] Further, the first separation mechanism includes: a flower tube and a centrifugal mechanism;

[0013] The flower tube is located inside the box, one end of the flower tube is connected to a pipe on the box for geothermal water to flow into, and the other end of the flower tube is connected to an inner wall of the box;

[0014] The centrifugal mechanism is sleeved on the outside of the flower tube, and a through hole is provided on the surface of the centrifugal mechanism for throwing the geothermal water flowing out of the flower tube onto the inner wall of the box;

[0015] The second separation mechanism is located above the centrifugal mechanism.

[0016] Furthermore, a support shaft is arranged in the flower tube, one end of the support shaft is connected to the inner wall of the box body, and a plurality of rotating wheels are arranged on the support shaft at intervals.

[0017] Furthermore, the centrifugal mechanism comprises: a rotating drum, a gear disc and a servo motor;

[0018] The rotating drum is sleeved on the outside of the floral tube, and the two ends of the rotating drum are rotatably connected to the contact parts of the floral tube;

[0019] The surface of the rotating drum is provided with a plurality of through holes;

[0020] The toothed disc is annular in structure and has teeth on its outer side. The toothed disc passes through the flower tube and is connected to one end surface of the rotating drum.

[0021] The servo motor is arranged on the outer wall of the box body, the output end of the servo motor is connected with a shaft, the shaft extends into the inside of the box body, a gear is sleeved on the shaft, and the gear is meshed with teeth on the gear disc.

[0022] Furthermore, a plurality of base plates are staggeredly arranged on the inner wall of the rotating drum.

[0023] Further, the second separation mechanism comprises: a first separation plate, a second separation plate and a third separation plate, all of which are connected to the inner wall of the box body;

[0024] The first separation plate is located above the centrifugal mechanism, the second separation plate is located above the first separation plate, and the third separation plate is located above the second separation plate;

[0025] The first separation plate, the second separation plate and the third separation plate are all provided with a plurality of filter holes. The filter holes on the first separation plate are vertically arranged, and the filter holes on the second separation plate and the filter holes on the third separation plate are inclined, and the inclination directions are opposite.

[0026] Furthermore, a plurality of filter plates are arranged at intervals in the filter hole, and the surface of the filter plate is wrapped with a hydrophobic filter membrane.

[0027] Further, the third separation mechanism comprises: a separation box, a reversing plate and a filter screen;

[0028] The bottom of the separation box is connected to the top of the box body through a pipeline, and the top of the separation box is connected to the steam turbine through a pipeline;

[0029] There are multiple reversing plates, which are arranged in parallel in the separation box, and the reversing plates construct the interior of the separation box into a continuous S-shaped curve. A gap is left between one end of the reversing plate and the box body, and the filter screen is arranged between the gap, and along the flow direction of the steam, the size of the filter holes on the filter screen gradually decreases.

[0030] Furthermore, a slow flow plate is obliquely provided on the side surface of the reversing plate, and the angle between the extension direction of the slow flow plate and the flow direction of the steam is greater than 90°.

[0031] Beneficial effects of the present invention:

[0032] Through the power generation system that is set up, geothermal energy can be used to generate electricity, thereby avoiding the waste of geothermal energy when the geothermal well is idle. In the power generation process, the geothermal water is separated into gas and liquid through the three-stage separation mechanism that is set up, so as to maximize the separation of steam from the geothermal water for power generation, thereby improving the efficiency of geothermal power generation and further improving the utilization rate of geothermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is a schematic diagram of the system framework provided by the present invention;

[0035] Figure 2 It is a schematic diagram of the internal structure of the box provided by the present invention;

[0036] Figure 3 is a schematic diagram of the internal structure of the third separation mechanism provided by the present invention;

[0037] Figure 4 It is a schematic diagram of the internal structure of the flower tube provided by the present invention.

[0038] Figure numerals: 1 is a medium-deep geothermal well, 2 is a shallow geothermal well, 3 is a box body, 4 is a flower pipe, 5 is a support shaft, 6 is a rotating wheel, 7 is a rotating drum, 8 is a gear plate, 9 is a servo motor, 10 is a base plate, 11 is a first separation plate, 12 is a second separation plate, 13 is a third separation plate, 14 is a separation box, 15 is a reversing plate, 16 is a filter screen, and 17 is a slow flow plate. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] See also Figures 1 to 4 , a geothermal power generation system for a medium-deep geothermal well, comprising: a geothermal well;

[0041] A power generation system, the power generation system is connected to the geothermal well and is used to convert geothermal energy into electrical energy and store it;

[0042] The power generation system comprises: a first separation mechanism, a second separation mechanism and a third separation mechanism;

[0043] The first separation mechanism is disposed in a box 3, and the box 3 is connected to a geothermal well through a pipeline, and is used to spray geothermal water out of the first separation mechanism in an atomized state;

[0044] The second separation mechanism is disposed in the box body 3 and is located above the first separation mechanism, and is used to perform a first gas-liquid separation process on the steam separated by the first separation mechanism;

[0045] The third separation mechanism is connected to the top of the box body 3 through a pipeline, and is used to perform a second separation process on the steam separated by the second separation mechanism, and send the separated steam to the steam turbine unit through a pipeline to generate electricity.

[0046] Among them, the main invention point of this application is that by setting up a multi-stage separation mechanism, the water vapor in the geothermal water can be separated from the geothermal water to the greatest extent, and then the pure steam is sent to the steam turbine unit to generate electricity.

[0047] In some embodiments, the geothermal wells include: a medium-deep geothermal well 1 and a shallow geothermal well 2;

[0048] The medium-deep geothermal well 1 and the shallow geothermal well 2 are connected to the box 3 through pipelines to form a loop, and valves and geothermal water circulation pumps are installed on the pipelines.

[0049] In some embodiments, the first separation mechanism includes: a flower tube 4 and a centrifugal mechanism;

[0050] The flower tube 4 is located inside the box body 3, one end of the flower tube 4 is connected to the pipe on the box body 3 for the geothermal water to flow into, and the other end of the flower tube 4 is connected to the inner wall of the box body 3;

[0051] The centrifugal mechanism is sleeved on the outside of the flower tube 4, and a through hole is provided on the surface of the centrifugal mechanism for throwing the geothermal water flowing out of the flower tube 4 onto the inner wall of the box body 3;

[0052] The second separation mechanism is located above the centrifugal mechanism;

[0053] A support shaft 5 is disposed in the flower tube 4 , one end of the support shaft 5 is connected to the inner wall of the box body 3 , and a plurality of rotating wheels 6 are disposed on the support shaft 5 at intervals.

[0054] Among them, after the local hot water enters the flower tube 4, under the impact of the water flow, the impeller 6 rotates to cut the geothermal water, so that the geothermal water collides with the impeller 6 and the inner wall of the flower tube 4, thereby realizing the preliminary gas-liquid separation process, and then the geothermal water is sprayed out from the flower tube 4, and the gas-liquid separation is performed again. After the local hot water is sprayed out from the flower tube 4, it enters the centrifugal mechanism for another gas-liquid separation process.

[0055] In some embodiments, the centrifugal mechanism includes: a rotating drum 7, a gear disc 8 and a servo motor 9;

[0056] The rotating drum 7 is sleeved on the outside of the flower tube 4, and the two ends of the rotating drum 7 are rotatably connected to the contact parts of the flower tube 4;

[0057] The surface of the rotating drum 7 is provided with a plurality of through holes;

[0058] The toothed disc 8 is annular in structure and has teeth on its outer side. The toothed disc 8 passes through the flower tube 4 and is connected to one end surface of the rotating drum 7.

[0059] The servo motor 9 is arranged on the outer wall of the box body 3, and the output end of the servo motor 9 is connected to a shaft, and the shaft extends into the inside of the box body 3, and a gear is sleeved on the shaft, and the gear meshes with the teeth on the gear plate 8;

[0060] A plurality of substrates 10 are staggeredly arranged on the inner wall of the rotating drum 7 .

[0061] Among them, after the local hot water is sprayed out from the flower tube 4, it enters the rotating drum 7. During the spraying process, the geothermal water collides with the rotating drum 7, which can realize gas-liquid separation again. Then, the servo motor 9 drives the shaft to rotate, and synchronously drives the gear to rotate, and then drives the gear plate 8 to rotate, and synchronously drives the rotating drum 7 to rotate. In this way, the geothermal water performs centrifugal motion in the rotating drum 7, and the geothermal water collides multiple times in the rotating drum 7, thereby increasing the centrifugal process, making the gas-liquid separation process more sufficient, separating more steam, and making the working process of the steam turbine more stable.

[0062] In order to increase the centrifugal process of the geothermal water in the drum 7 , a plurality of base plates 10 are staggeredly arranged in the drum 7 , thereby increasing the collision frequency of the geothermal water in the drum 7 .

[0063] After the steam is ejected from the drum 7, it moves upward and enters the second separation mechanism in turn to undergo another gas-liquid separation process.

[0064] Furthermore, a return pipe is provided on the side of the box body 3, and the return pipe is connected to the geothermal well. When the geothermal water in the box body 3 rises to a certain height, the geothermal water can be sent back to the geothermal well by opening the valve on the return pipe. The water level can be detected by setting a liquid level sensor inside the box body 3.

[0065] In some embodiments, the second separation mechanism includes: a first separation plate 11, a second separation plate 12 and a third separation plate 13, all of which are connected to the inner wall of the box body 3;

[0066] The first separation plate 11 is located above the centrifugal mechanism, the second separation plate 12 is located above the first separation plate 11, and the third separation plate 13 is located above the second separation plate 12;

[0067] The first separation plate 11, the second separation plate 12 and the third separation plate 13 are all provided with a plurality of filter holes. The filter holes on the first separation plate 11 are vertically arranged, and the filter holes on the second separation plate 12 and the filter holes on the third separation plate 13 are inclined, and the inclination directions are opposite;

[0068] A plurality of filter plates are arranged at intervals in the filter holes, and the surfaces of the filter plates are wrapped with hydrophobic filter membranes.

[0069] Among them, after the steam is ejected from the drum 7, it first passes through the filter holes of the first separation plate 11, thereby performing a gas-liquid separation process again to purify the steam, and then the steam passes through the second separation plate 12 and the third separation plate 13 to perform a gas-liquid separation process again. By setting the filter holes on the three separation plates in different directions, the gas-liquid separation effect can be increased again. Furthermore, in order to increase the gas-liquid separation process, a filter plate is set in the filter hole, and a hydrophobic filter membrane is wrapped on the filter plate. The hydrophobic filter membrane is used to pass steam but not water, so that steam with higher purity can be obtained.

[0070] In some embodiments, the third separation mechanism includes: a separation box 14, a reversing plate 15 and a filter screen 16;

[0071] The bottom of the separation box 14 is connected to the top of the box body 3 through a pipeline, and the top of the separation box 14 is connected to the steam turbine through a pipeline;

[0072] The reversing plates 15 are provided in plurality and arranged in parallel in the separation box 14, and the reversing plates 15 construct the interior of the separation box 14 into a continuous S-shaped curve, a gap is left between one end of the reversing plate 15 and the box body 3, the filter screen 16 is arranged between the gap, and along the flow direction of the steam, the filter hole size on the filter screen 16 gradually decreases;

[0073] A slow flow plate 17 is obliquely disposed on the side surface of the reversing plate 15 , and the angle between the extending direction of the slow flow plate 17 and the flow direction of the steam is greater than 90°.

[0074] Among them, when the steam passes through the third separation plate 13 and enters the separation box 14 along the pipeline, a dryer can be set on the pipeline to reduce the water content of the steam, so that the steam entering the separation box 14 is drier, and then the steam flows in the separation box 14. Due to the setting of the reversing plate 15, the steam moves in the separation box 14 in an S-shaped path, thereby increasing the number of collisions between the steam and the reversing plate 15, making the gas-liquid separation process more thorough, and the filter screen 16 and the slow flow plate 17 with a barbed structure are set on the reversing plate to increase the gas-liquid separation process. By gradually reducing the size of the filter holes on the filter screen 16, the gas-liquid separation effect can be made more obvious, so that the steam that finally enters the steam turbine unit for operation has a higher purity, thereby achieving higher power generation efficiency.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A geothermal power generation system for a medium-deep geothermal well, characterized in that: include: geothermal wells; A power generation system, the power generation system is connected to the geothermal well and is used to convert geothermal energy into electrical energy and store it; The power generation system comprises: a first separation mechanism, a second separation mechanism and a third separation mechanism; The first separation mechanism is disposed in a box body, and the box body is connected to a geothermal well through a pipeline, and is used to spray geothermal water out from the first separation mechanism in an atomized state; The second separation mechanism is disposed in the box body and located above the first separation mechanism, and is used to perform a first gas-liquid separation process on the steam separated by the first separation mechanism; The third separation mechanism is connected to the top of the box through a pipeline, and is used to perform a second separation process on the steam separated by the second separation mechanism, and send the separated steam to the turbine unit through a pipeline to generate electricity.

2. The geothermal power generation system for medium-deep geothermal wells according to claim 1, characterized in that: The geothermal wells include: medium-deep geothermal wells and shallow geothermal wells; The medium-deep geothermal well and the shallow geothermal well are connected to the box through pipelines to form a loop, and valves and geothermal water circulation pumps are installed on the pipelines.

3. The geothermal power generation system for medium-deep geothermal wells according to claim 1, characterized in that: The first separation mechanism includes: a flower tube and a centrifugal mechanism; The flower tube is located inside the box, one end of the flower tube is connected to a pipe on the box for geothermal water to flow into, and the other end of the flower tube is connected to an inner wall of the box; The centrifugal mechanism is sleeved on the outside of the flower tube, and a through hole is provided on the surface of the centrifugal mechanism for throwing the geothermal water flowing out of the flower tube onto the inner wall of the box; The second separation mechanism is located above the centrifugal mechanism.

4. The geothermal power generation system for a medium-deep geothermal well according to claim 3, characterized in that: A support shaft is arranged in the flower tube, one end of the support shaft is connected to the inner wall of the box body, and a plurality of rotating wheels are arranged at intervals on the support shaft.

5. The geothermal power generation system for medium-deep geothermal wells according to claim 3, characterized in that: The centrifugal mechanism comprises: a rotating drum, a gear disc and a servo motor; The rotating drum is sleeved on the outside of the floral tube, and the two ends of the rotating drum are rotatably connected to the contact parts of the floral tube; The surface of the rotating drum is provided with a plurality of through holes; The toothed disc is annular in structure and has teeth on its outer side. The toothed disc passes through the flower tube and is connected to one end surface of the rotating drum. The servo motor is arranged on the outer wall of the box body, the output end of the servo motor is connected with a shaft, the shaft extends into the inside of the box body, a gear is sleeved on the shaft, and the gear is meshed with teeth on the gear disc.

6. The geothermal power generation system for medium-deep geothermal wells according to claim 5, characterized in that: A plurality of base plates are staggeredly arranged on the inner wall of the rotating drum.

7. The geothermal power generation system for a medium-deep geothermal well according to claim 3, characterized in that: The second separation mechanism comprises: a first separation plate, a second separation plate and a third separation plate, all of which are connected to the inner wall of the box; The first separation plate is located above the centrifugal mechanism, the second separation plate is located above the first separation plate, and the third separation plate is located above the second separation plate; The first separation plate, the second separation plate and the third separation plate are all provided with a plurality of filter holes. The filter holes on the first separation plate are vertically arranged, and the filter holes on the second separation plate and the filter holes on the third separation plate are inclined, and the inclination directions are opposite.

8. The geothermal power generation system for medium-deep geothermal wells according to claim 7, characterized in that: A plurality of filter plates are arranged at intervals in the filter holes, and the surfaces of the filter plates are wrapped with hydrophobic filter membranes.

9. The geothermal power generation system for medium-deep geothermal wells according to claim 1, characterized in that: The third separation mechanism comprises: a separation box, a reversing plate and a filter screen; The bottom of the separation box is connected to the top of the box body through a pipeline, and the top of the separation box is connected to the steam turbine through a pipeline; There are multiple reversing plates, which are arranged in parallel in the separation box, and the reversing plates construct the interior of the separation box into a continuous S-shaped curve. A gap is left between one end of the reversing plate and the box body, and the filter screen is arranged between the gap, and along the flow direction of the steam, the size of the filter holes on the filter screen gradually decreases.

10. The geothermal power generation system for medium-deep geothermal wells according to claim 9, characterized in that: A slow flow plate is obliquely arranged on the side surface of the reversing plate, and the angle between the extending direction of the slow flow plate and the flow direction of the steam is greater than 90°.

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