Heat exchange sleeve device and method for efficiently exploiting geothermal resources

Abstract

The invention discloses a heat exchange sleeve device and method for efficiently exploiting geothermal resources, and relates to the technical field of energy recovery equipment. The floor heating device comprises a floor heating layer, floor heating pipes are installed in the floor heating layer, and heat absorption metal sheets are installed at the bottoms of the surfaces of the floor heating pipes; a circulation assembly is arranged on the top of the geothermal layer and comprises a main water tank. Through the arrangement of the circulating assembly, heat energy in the geothermal layer can be recycled in a circulating mode, when working medium circulating fluid enters the geothermal pipe, convection is formed around geothermal fluid, heat transfer is achieved, and the utilization efficiency of the heat energy is effectively improved; opening and closing of the first circulating pipe and the second circulating pipe can be controlled, working medium circulating fluid can be guided into the auxiliary water tank in a concentrated mode by changing the circulating direction of the second circulating pipe, use in the external low-temperature environment is facilitated, and the utilization efficiency of heat energy is further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of geothermal resource exploitation, and in particular relates to a heat exchange sleeve device and method for efficiently exploiting geothermal resources. Background Art

[0002] Geothermal energy is a clean and renewable energy source. The development and utilization of geothermal energy, especially the development of deep geothermal resources, has gradually become one of the key focus areas of new energy development. At present, the development and utilization of geothermal resources not only include direct utilization such as heating and planting, but also can realize geothermal cooling and medium and high temperature geothermal resource power generation. In addition, geothermal resource development has also developed from medium and shallow hydrothermal resources to deeper geothermal, hot dry rock resources and other deeper formations. By utilizing the phase change of the working fluid in the pipe, heat can be quickly transferred from the high temperature section to the low temperature section. It is one of the most effective heat transfer equipment currently.

[0003] In the prior art, a Chinese patent with publication number "CN107144035A" discloses a loop heat pipe geothermal mining system with adjustable working fluid circulation flow rate. The circulation flow rate of the working fluid is controllable by controlling a one-way valve or a steam pump, a one-way throttle valve, a heat exchange temperature of a surface heat exchanger, and the liquid height of a liquid storage tank, thereby achieving no liquid accumulation in the outer casing, no dry burning, and film boiling, thereby maximizing the heat transfer efficiency of the heat pipe.

[0004] However, the existing technology still has major deficiencies, such as:

[0005] When the geothermal heat exchange tube is placed inside the formation, the working medium circulating fluid is continuously heated and vaporized, and the heat is transferred by hot steam. However, the rising process of hot steam is easily affected by the external environment. When the external temperature is low, the pressure of the rising hot steam will be affected by the external temperature and decrease, which greatly reduces the heat transfer efficiency. Moreover, when the working medium circulating fluid is continuously heated and circulated, the high temperature will also affect the inner wall of the pipeline and the circulation equipment, causing the inner wall coating and impurities such as iron filings to fall off, and deposition and agglomeration will occur inside the pipeline, which greatly reduces the heat exchange efficiency of the pipeline.

[0006] To this end, we provide a heat exchange sleeve device and method for efficiently exploiting geothermal resources to solve the above-mentioned problems. Summary of the invention

[0007] The purpose of the present invention is to provide a heat exchange casing device and method for efficiently exploiting geothermal resources. Through the cooperation of a circulation component, a diversion component, a heat exchange component and a heat conduction component, the problem in the prior art that the geothermal heat exchange pipe is easily affected by the external temperature when exchanging heat through hot steam, resulting in a decrease in heat exchange efficiency, and when the working medium circulating fluid is continuously heated, impurities from the inner wall of the pipe and the inside of the circulation equipment will continue to accumulate inside the working medium circulating fluid, affecting the heat exchange efficiency.

[0008] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0009] The present invention is a heat exchange sleeve device for efficiently exploiting geothermal resources, comprising a geothermal layer, a geothermal pipe installed inside the geothermal layer, and a heat absorbing metal sheet installed on the bottom of the surface of the geothermal pipe;

[0010] A circulation component is provided on the top of the geothermal layer, and the circulation component includes a main water tank, which is installed on the top of the geothermal layer, a secondary water tank is fixedly connected to one side of the main water tank, and a pressure pump is connected to the front side of the secondary water tank. A first circulation pipe and a second circulation pipe are respectively provided inside the geothermal pipe, and the heat energy in the geothermal layer is circulated through the circulation component;

[0011] A flow splitter assembly is provided at the front side of the main water tank, and the opening and closing of the first circulation pipe and the second circulation pipe are controlled by the flow splitter assembly;

[0012] A heat exchange component is provided on the top of the main water tank, through which the temperature collected inside the geothermal layer is conducted;

[0013] A heat-conducting component is arranged on the surface of the geothermal pipe, and the heat of the geothermal layer is used to preheat the working medium circulating fluid of the secondary circulation through the heat-conducting component.

[0014] The present invention is further configured such that the diversion component includes a sealing shell, the sealing shell is connected to the interior of a first circulation pipe, the top of the first circulation pipe is connected to a first water pipe, one side of the sealing shell is fixedly connected to a driving motor, the output end of the driving motor is fixedly connected to a rotating rod, the other end of the rotating rod passes through the interior of the sealing shell and is fixedly connected to a ball valve, and a through opening is opened inside the ball valve.

[0015] The present invention is further configured such that support pipes are sleeved on the surfaces of the first circulation pipe and the second circulation pipe, the rear end of the first circulation pipe is connected to the main water tank, the top end of the first water pipe is connected to the sealing shell, and the top end of the second circulation pipe passes through the geothermal pipe and is connected to the main water tank.

[0016] The present invention is further configured such that a second water pipe is connected to the bottom of the sealing shell, the other end of the second water pipe is connected to a pressure pump, and a bracket is fixedly connected between the driving motor and the main water tank.

[0017] The present invention is further configured as follows: the heat exchange component includes a steam pipe, the steam pipe is connected to the top end of the geothermal pipe, a steam turbine is arranged inside the steam pipe, a transmission shaft is fixedly connected inside the steam turbine, a generator is fixedly connected to one side of the steam pipe, an output end of the generator passes through the steam pipe and is fixedly connected to the transmission shaft, a rear end of the steam pipe is connected to a plate heat exchanger, and a drain pipe is connected to the rear side of the plate heat exchanger.

[0018] The present invention is further configured such that a circulating heat pipe is fixedly connected to the inside of the steam pipe, the front end of the circulating heat pipe passes through the steam pipe and is connected to the second water pipe, a solenoid valve is sleeved on the surface of the circulating heat pipe, the rear end of the circulating heat pipe passes through the steam pipe and is connected to the auxiliary water tank, the bottom of the plate heat exchanger is connected to a third water pipe, and the bottom end of the third water pipe is connected to the main water tank.

[0019] The present invention is further configured such that the heat-conducting component includes a heat storage pipe, the heat storage pipe is respectively fixed to the surface of the first circulation pipe and the second circulation pipe, and a sealing plug is provided on the top of the heat storage pipe.

[0020] The present invention is further configured such that a first one-way valve is sleeved on the surface of the first circulation pipe, and a second one-way valve is sleeved on the surface of the second circulation pipe.

[0021] The present invention is further configured such that a thermal insulation pipe is fixedly connected to the surface of the geothermal pipe, and the front sides of the main water tank and the auxiliary water tank are both connected to a water inlet pipe.

[0022] A method for efficiently exploiting geothermal resources using a heat exchange sleeve device comprises the following steps;

[0023] S1: After the geothermal pipe is placed in the geothermal layer, the working medium circulating fluid can be injected into the main water tank and the auxiliary water tank. The working medium circulating fluid entering the main water tank can enter the geothermal pipe through the first circulation pipe and the second circulation pipe. When the working medium circulating fluid enters the geothermal pipe, its temperature is usually lower than the surrounding geothermal fluid. Due to the low density of hot water or steam, they tend to float up, while the cold geothermal fluid sinks. This natural convection effect can promote the transfer of heat, making the heat exchange between the working medium circulating fluid and the geothermal fluid more efficient, so that it forms convection around the geothermal fluid to achieve heat transfer. The geothermal temperature is usually between 80°C and 150°C, which can evaporate the high-temperature working medium circulating fluid;

[0024] S2: The evaporated gas enters the steam pipe and drives the steam turbine to rotate. The steam turbine transmits power to the generator while rotating. The steam condenses when it is cooled to produce distilled water, which is discharged into the main water tank through the pipe at the bottom of the plate heat exchanger for storage, thus achieving the effect of circulation;

[0025] S3: At the same time, the booster pump is started, and the booster pump draws the working medium circulating fluid in the auxiliary water tank into the second water pipe, and injects it into the circulating heat conduction pipe through the second water pipe. The circulating heat conduction pipe absorbs the heat emitted from the surface of the steam pipe, so as to fully utilize the heat energy;

[0026] S4: When the external environment is in a low temperature state, the rising state of steam will be affected. At this time, the driving motor can be started to drive the ball valve to rotate to close the first circulation pipe, and the opening can be connected with the first water pipe and the second water pipe. At this time, the booster pump can be started again, and the hot water in the geothermal pipe can be pumped out through the booster pump and the second circulation pipe, and the hot water is injected into the auxiliary water tank to realize thermal energy utilization.

[0027] The present invention has the following beneficial effects:

[0028] 1. The present invention can circulate and recover the heat energy in the geothermal layer through the setting of the circulation component. When the working medium circulating fluid enters the geothermal pipe, it forms convection around the geothermal fluid to achieve heat transfer, effectively improving the utilization efficiency of thermal energy. Through the setting of the diversion component, the opening and closing of the first circulation pipe and the second circulation pipe can be controlled. By changing the circulation direction of the second circulation pipe, the working medium circulating fluid can be concentratedly introduced into the auxiliary water tank, which is convenient for use in an external low-temperature environment, further improving the utilization efficiency of thermal energy.

[0029] 2. The present invention can make full use of the heat energy carried by the working medium circulating fluid through the arrangement of the heat exchange component. The evaporated working medium circulating fluid drives the steam turbine to rotate, and the steam energy is converted into electric energy through the generator and transported to the power grid equipment for storage. The steam after passing through the steam pipe enters the plate heat exchanger, and the heat energy is convectively conducted to the external circulating water flow through the plate heat exchanger, thereby realizing full use of the heat energy.

[0030] 3. The present invention can preheat the working medium circulating fluid of the secondary circulation by setting the heat-conducting component. The working medium circulating fluid in the main water tank has a low temperature. When it is directly injected into the geothermal pipe, the temperature inside the geothermal pipe will be reduced, so that the evaporation temperature is affected. A part of the temperature can be stored by the heat storage pipe fixed on the surface of the first circulation pipe and the second circulation pipe. During the circulation process, the working medium circulating fluid discharged from the main water tank can be heated to achieve the preheating effect.

[0031] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0033] Figure 1 A structural stereogram of a heat exchange sleeve device and method for efficiently exploiting geothermal resources;

[0034] Figure 2 It is a partial cross-sectional view of a geothermal pipe and a heat storage pipe in a heat exchange casing device and method for efficiently exploiting geothermal resources;

[0035] Figure 3 A top cross-sectional view of a geothermal pipe in a heat exchange casing device and method for efficiently exploiting geothermal resources;

[0036] Figure 4 It is a side view of a main water tank, a secondary water tank and a steam pipe in a heat exchange casing device and method for efficiently exploiting geothermal resources;

[0037] Figure 5 A side cross-sectional view of a steam pipe in a heat exchange casing device and method for efficiently exploiting geothermal resources;

[0038] Figure 6 A top view of the front structure of a main water tank in a heat exchange sleeve device and method for efficiently exploiting geothermal resources;

[0039] Figure 7 It is a side cross-sectional view of a sealing shell in a heat exchange sleeve device and method for efficiently exploiting geothermal resources;

[0040] Figure 8 The diagram is an exploded view of the internal structure of a sealing shell in a heat exchange sleeve device and method for efficiently exploiting geothermal resources.

[0041] In the attached figure: 1, geothermal layer; 2, geothermal pipe; 3, heat-absorbing metal sheet; 4, main water tank; 5, auxiliary water tank; 6, pressure pump; 7, first circulation pipe; 8, second circulation pipe; 9, sealing shell; 10, first water pipe; 11, driving motor; 12, rotating rod; 13, ball valve; 14, through port; 15, supporting pipe; 16, second water pipe; 17, bracket; 18, steam pipe; 19, steam turbine; 20, transmission shaft; 21, generator; 22, plate heat exchanger; 23, drain pipe; 24, circulating heat pipe; 25, solenoid valve; 26, third water pipe; 27, heat storage pipe; 28, sealing plug; 29, first one-way valve; 30, second one-way valve; 31, insulation pipe; 32, water inlet pipe. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Specific embodiment 1

[0044] See also Figure 1-8The present invention is a heat exchange sleeve device for efficiently exploiting geothermal resources, comprising a geothermal layer 1, a geothermal pipe 2 is installed inside the geothermal layer 1, and a heat-absorbing metal sheet 3 is installed on the bottom of the surface of the geothermal pipe 2; a circulation component is arranged on the top of the geothermal layer 1, and the circulation component comprises a main water tank 4, which is installed on the top of the geothermal layer 1, and a secondary water tank 5 is fixedly connected to one side of the main water tank 4, and a booster pump 6 is connected to the front side of the secondary water tank 5, and a first circulation pipe 7 and a second circulation pipe 8 are respectively arranged inside the geothermal pipe 2, and the heat energy in the geothermal layer 1 is circulated and utilized through the circulation component; a shunt component is arranged on the front side of the main water tank 4, and the opening and closing of the first circulation pipe 7 and the second circulation pipe 8 are controlled by the shunt component; a heat exchange component is arranged on the top of the main water tank 4, and the temperature collected inside the geothermal layer 1 is conducted through the heat exchange component; a heat conduction component is arranged on the surface of the geothermal pipe 2, and the heat of the geothermal layer 1 is used to preheat the working medium circulation fluid of the secondary circulation through the heat of the geothermal layer 1.

[0045] Specifically: the geothermal pipe 2 is made of high-temperature alloy steel, which has high corrosion resistance and thermal conductivity, and can fully absorb the heat energy in the geothermal layer 1. The heat-absorbing metal sheet 3 can increase the contact area between the geothermal pipe 2 and the geothermal layer 1, and increase the heat exchange effect. The main water tank 4 and the auxiliary water tank 5 are both injected with working medium circulating fluid. The first circulation pipe 7 and the second circulation pipe 8 are made of high-temperature alloy steel, which can increase the absorption efficiency of heat energy. The booster pump 6 can generate negative pressure, and the working medium circulating fluid in the geothermal layer 1 is extracted through the first circulation pipe 7 to achieve the circulation effect. Specific embodiment 2

[0047] See also Figure 1-8 On the basis of the specific embodiment 1, the flow diversion component includes a sealing shell 9, the sealing shell 9 is connected to the inside of the first circulation pipe 7, the top of the first circulation pipe 7 is connected to the first water pipe 10, one side of the sealing shell 9 is fixedly connected to a driving motor 11, the output end of the driving motor 11 is fixedly connected to a rotating rod 12, the other end of the rotating rod 12 penetrates into the inside of the sealing shell 9 and is fixedly connected to a ball valve 13, a through port 14 is opened inside the ball valve 13, the surfaces of the first circulation pipe 7 and the second circulation pipe 8 are both sleeved with a support pipe 15, the rear end of the first circulation pipe 7 is connected to the main water tank 4, the top of the first water pipe 10 is connected to the sealing shell 9, the top of the second circulation pipe 8 penetrates the geothermal pipe 2 and It is connected to the main water tank 4, and a second water pipe 16 is connected to the bottom of the sealing shell 9. The other end of the second water pipe 16 is connected to the booster pump 6. A bracket 17 is fixedly connected between the drive motor 11 and the main water tank 4. The heat exchange component includes a steam pipe 18, and the steam pipe 18 is connected to the top of the geothermal pipe 2. A steam turbine 19 is arranged inside the steam pipe 18, and a transmission shaft 20 is fixedly connected inside the steam turbine 19. A generator 21 is fixedly connected to one side of the steam pipe 18, and an output end of the generator 21 passes through the steam pipe 18 and is fixedly connected to the transmission shaft 20. The rear end of the steam pipe 18 is connected to a plate heat exchanger 22, and the rear side of the plate heat exchanger 22 is connected to a drain pipe 23.

[0048] Specifically: a temperature sensor is provided on the surface of the steam pipe 18, and the temperature sensor is used to detect the temperature of the external environment of the steam pipe 18, and a temperature value is set for the temperature sensor. When the external environment temperature of the steam pipe 18 is lower than the set value, the heat exchange mode can be switched, and the ball valve 13 fits the inner wall of the sealing shell 9. When the ball valve 13 rotates to a horizontal state, the connection between the first circulation pipe 7 and the main water tank 4 can be ensured. When the ball valve 13 rotates to a vertical state, the connection between the first water pipe 10 and the second water pipe 16 can be ensured. The driving motor 11 is a servo motor in the prior art, and the rotation angle of the ball valve 13 can be preset and controlled. High-pressure steam enters the steam pipe 18, drives the steam turbine 19 to rotate, and converts heat energy into mechanical energy. The rotation of the steam turbine 19 transmits the mechanical energy to the transmission shaft 20. When the transmission shaft 20 drives the shaft of the generator 21 to rotate, the magnetic lines of force in the magnetic field interact with the current to generate an electromotive force, thereby generating current. The generated current is sent to the transformer, and after boosting, it is output to the power grid for storage. Specific embodiment three

[0050] See also Figure 1-8 On the basis of the specific embodiment 1, a circulating heat conducting pipe 24 is fixedly connected inside the steam pipe 18, the front end of the circulating heat conducting pipe 24 passes through the steam pipe 18 and is connected to the second water pipe 16, a solenoid valve 25 is sleeved on the surface of the circulating heat conducting pipe 24, the rear end of the circulating heat conducting pipe 24 passes through the steam pipe 18 and is connected to the auxiliary water tank 5, a third water pipe 26 is connected to the bottom of the plate heat exchanger 22, and the bottom end of the third water pipe 26 is connected to the main water tank 4, the heat conduction component includes a heat storage pipe 27, the heat storage pipe 27 is respectively fixed on the surface of the first circulation pipe 7 and the second circulation pipe 8, a sealing plug 28 is arranged on the top of the heat storage pipe 27, a first one-way valve 29 is sleeved on the surface of the first circulation pipe 7, and a second one-way valve 30 is sleeved on the surface of the second circulation pipe 8, an insulation pipe 31 is fixedly connected to the surface of the geothermal pipe 2, and the front sides of the main water tank 4 and the auxiliary water tank 5 are both connected with a water inlet pipe 32.

[0051] Specifically: the circulating heat pipe 24 is fixed inside the steam pipe 18. When the steam enters the steam pipe 18 and drives the steam turbine 19 to rotate, part of the heat will be dissipated through the outer wall of the steam pipe 18. The dissipated heat energy can be conducted and absorbed through the circulating heat pipe 24. The top of the heat storage pipe 27 passes through the outside of the geothermal layer 1. Liquid with high conductivity can be injected into the heat storage pipe 27. The heat energy in the geothermal layer 1 is absorbed by the heat storage pipe 27, and the heat energy is conducted to the first circulation pipe 7 to achieve the preheating effect. The first one-way valve 29 and the second one-way valve 30 can respectively control the opening and closing of the first circulation pipe 7 and the second circulation pipe 8, so that the working medium circulating fluid in the main water tank 4 can only be discharged in one direction to avoid backflow.

[0052] A method for efficiently exploiting geothermal resources using a heat exchange sleeve device comprises the following steps;

[0053] S1: After the geothermal pipe 2 is placed in the geothermal layer 1, the working medium circulating fluid can be injected into the main water tank 4 and the auxiliary water tank 5. The working medium circulating fluid entering the main water tank 4 can enter the geothermal pipe 2 through the first circulation pipe 7 and the second circulation pipe 8. When the working medium circulating fluid enters the geothermal pipe 2, when the working medium circulating fluid enters the geothermal pipeline, its temperature is usually lower than the surrounding geothermal fluid. Due to the low density of hot water or steam, they tend to float up, while the cold geothermal fluid sinks. This natural convection effect can promote the transfer of heat, making the heat exchange between the working medium circulating fluid and the geothermal fluid more efficient, so that it forms convection around the geothermal fluid to achieve heat transfer. The geothermal temperature is usually between 80°C and 150°C, which can evaporate the high-temperature working medium circulating fluid;

[0054] S2: The evaporated gas enters the steam pipe 18 and drives the steam turbine 19 to rotate. The steam turbine 19 transmits power to the generator 21 while rotating. The steam condenses when it is cooled to produce distilled water, which is discharged into the main water tank 4 through the pipe at the bottom of the plate heat exchanger 22 for storage, thus achieving a circulation effect;

[0055] S3: Simultaneously start the booster pump 6, which pumps the circulating fluid in the auxiliary water tank 5 into the second water pipe 16, and injects it into the circulating heat pipe 24 through the second water pipe 16. The circulating heat pipe 24 absorbs the heat emitted from the surface of the steam pipe 18, thereby fully utilizing the heat energy.

[0056] S4: When the external environment is in a low temperature state, the rising state of the steam will be affected. At this time, the driving motor 11 can be started to drive the ball valve 13 to rotate to close the first circulation pipe 7, and make the port 14 connected with the first water pipe 10 and the second water pipe 16. At this time, the booster pump 6 can be started again, and the hot water in the geothermal pipe 2 can be pumped out through the booster pump 6 and the second circulation pipe 8, and the hot water is injected into the auxiliary water tank 5 to realize the utilization of thermal energy.

[0057] The working principle of the present invention is as follows: after the geothermal pipe 2 is placed in the geothermal layer 1, the working medium circulating fluid can be injected into the main water tank 4 and the auxiliary water tank 5. The working medium circulating fluid entering the main water tank 4 can enter the geothermal pipe 2 through the first circulation pipe 7 and the second circulation pipe 8. When the working medium circulating fluid enters the geothermal pipe 2, convection is formed around the geothermal fluid to achieve heat transfer. The geothermal temperature is usually between 80°C and 150°C, and the high-temperature working medium circulating fluid can be evaporated;

[0058] The evaporated gas enters the steam pipe 18 and drives the steam turbine 19 to rotate. The steam turbine 19 rotates and transmits power to the generator 21. The steam energy is converted into electrical energy through the generator 21 and transmitted to the power grid equipment for storage. The steam after passing through the steam pipe 18 enters the plate heat exchanger 22, which is composed of multiple groups of pipes and is used to transfer heat between steam and other fluids. The steam flows through the pipes in the pipe bundle and transfers heat to other fluids flowing outside the pipes. There are inlets and outlets inside the shell for introducing and discharging fluids. When the steam is cooled and condensed, distilled water is produced, which is discharged into the main water tank 4 again through the pipe at the bottom of the plate heat exchanger 22 for storage, thereby achieving a circulation effect.

[0059] At the same time, the booster pump 6 is started, and the booster pump 6 draws the working medium circulating fluid in the auxiliary water tank 5 into the second water pipe 16, and injects it into the circulating heat pipe 24 through the second water pipe 16, and the circulating heat pipe 24 absorbs the heat emitted from the surface of the steam pipe 18, so as to fully utilize the heat energy;

[0060] When the external environment is in a low temperature state, the rising state of the steam will be affected. At this time, the driving motor 11 can be started, and the ball valve 13 can be driven by the driving motor 11 to rotate ninety degrees clockwise. When the ball valve 13 rotates, the first circulation pipe 7 is closed, and the port 14 is connected with the first water pipe 10 and the second water pipe 16. At this time, the booster pump 6 can be started again, and the hot water in the geothermal pipe 2 can be pumped out by the booster pump 6 in cooperation with the second circulation pipe 8, and the hot water is injected into the auxiliary water tank 5 to realize the utilization of thermal energy. At the same time, after the working medium circulating fluid is accumulated for many times inside, the working medium circulating fluid can also be completely pumped into the auxiliary water tank 5, which is convenient for the staff to replace it.

[0061] The standard parts used in the present invention can all be purchased from the market, and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatically controlled by a control unit. The control circuit of the control unit can be realized by simple programming by technicians in this field, which is common knowledge in this field, so the control method and circuit connection are not explained in detail in the present invention.

[0062] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can better understand and utilize the present invention.

Claims

1. A heat exchange sleeve device for efficiently exploiting geothermal resources, comprising a geothermal layer (1), characterized in that: A geothermal pipe (2) is installed inside the geothermal layer (1), and a heat-absorbing metal sheet (3) is installed at the bottom of the surface of the geothermal pipe (2); A circulation component is arranged on the top of the geothermal layer (1), and the circulation component comprises a main water tank (4). The main water tank (4) is installed on the top of the geothermal layer (1), a secondary water tank (5) is fixedly connected to one side of the main water tank (4), and a pressure pump (6) is connected to the front side of the secondary water tank (5). A first circulation pipe (7) and a second circulation pipe (8) are respectively arranged inside the geothermal pipe (2), and the heat energy in the geothermal layer (1) is circulated through the circulation component; A flow splitter assembly is provided on the front side of the main water tank (4), and the opening and closing of the first circulation pipe (7) and the second circulation pipe (8) are controlled by the flow splitter assembly; A heat exchange component is provided on the top of the main water tank (4), and the temperature collected inside the geothermal layer (1) is conducted through the heat exchange component; A heat conducting component is provided on the surface of the geothermal pipe (2), and the heat of the geothermal layer (1) is used to preheat the working medium circulating fluid of the secondary circulation through the heat conducting component.

2. A heat exchange sleeve device for efficiently exploiting geothermal resources according to claim 1, characterized in that: The flow diversion component comprises a sealing shell (9), the sealing shell (9) is connected to the inside of a first circulation pipe (7), the top of the first circulation pipe (7) is connected to a first water pipe (10), one side of the sealing shell (9) is fixedly connected to a driving motor (11), the output end of the driving motor (11) is fixedly connected to a rotating rod (12), the other end of the rotating rod (12) passes through the inside of the sealing shell (9) and is fixedly connected to a ball valve (13), and a through port (14) is provided inside the ball valve (13).

3. A heat exchange sleeve device for efficiently exploiting geothermal resources according to claim 2, characterized in that: The surfaces of the first circulation pipe (7) and the second circulation pipe (8) are both sleeved with a support pipe (15); the rear end of the first circulation pipe (7) is connected to the main water tank (4); the top end of the first water pipe (10) is connected to the sealing shell (9); and the top end of the second circulation pipe (8) passes through the geothermal pipe (2) and is connected to the main water tank (4).

4. The heat exchange sleeve device for efficiently exploiting geothermal resources according to claim 2, characterized in that: The bottom of the sealed shell (9) is connected to a second water pipe (16), the other end of the second water pipe (16) is connected to a pressure pump (6), and a bracket (17) is fixedly connected between the drive motor (11) and the main water tank (4).

5. The heat exchange sleeve device for efficiently exploiting geothermal resources according to claim 1, characterized in that: The heat exchange assembly comprises a steam pipe (18), the steam pipe (18) being connected to the top end of the geothermal pipe (2), a steam turbine (19) being arranged inside the steam pipe (18), a transmission shaft (20) being fixedly connected inside the steam turbine (19), a generator (21) being fixedly connected to one side of the steam pipe (18), an output end of the generator (21) passing through the steam pipe (18) and being fixedly connected to the transmission shaft (20), a rear end of the steam pipe (18) being connected to a plate heat exchanger (22), and a rear side of the plate heat exchanger (22) being connected to a drainage pipe (23).

6. A heat exchange sleeve device for efficiently exploiting geothermal resources according to claim 5, characterized in that: A circulating heat-conducting pipe (24) is fixedly connected inside the steam pipe (18); the front end of the circulating heat-conducting pipe (24) passes through the steam pipe (18) and is connected to the second water pipe (16); a solenoid valve (25) is sleeved on the surface of the circulating heat-conducting pipe (24); the rear end of the circulating heat-conducting pipe (24) passes through the steam pipe (18) and is connected to the auxiliary water tank (5); the bottom of the plate heat exchanger (22) is connected to a third water pipe (26); the bottom end of the third water pipe (26) is connected to the main water tank (4).

7. The heat exchange sleeve device for efficiently exploiting geothermal resources according to claim 1, characterized in that: The heat-conducting component comprises a heat storage pipe (27), the heat storage pipe (27) being respectively fixed to the surface of the first circulation pipe (7) and the second circulation pipe (8), and a sealing plug (28) is arranged at the top of the heat storage pipe (27).

8. The heat exchange sleeve device for efficiently exploiting geothermal resources according to claim 1, characterized in that: A first one-way valve (29) is sleeved on the surface of the first circulation pipe (7), and a second one-way valve (30) is sleeved on the surface of the second circulation pipe (8).

9. The heat exchange sleeve device for efficiently exploiting geothermal resources according to claim 1, characterized in that: A heat preservation pipe (31) is fixedly connected to the surface of the geothermal pipe (2), and a water inlet pipe (32) is connected to the front sides of the main water tank (4) and the auxiliary water tank (5).

10. A method for efficiently exploiting geothermal resources using a heat exchange casing device, based on the heat exchange casing device for efficiently exploiting geothermal resources according to any one of claims 1 to 9, characterized in that: The steps include: S1: After the geothermal pipe (2) is placed in the geothermal layer (1), the working medium circulating fluid can be injected into the main water tank (4) and the auxiliary water tank (5). The working medium circulating fluid entering the main water tank (4) can enter the geothermal pipe (2) through the first circulation pipe (7) and the second circulation pipe (8). When the working medium circulating fluid enters the geothermal pipe (2), convection is formed around the geothermal fluid to achieve heat transfer. The geothermal temperature is usually between 80° C. and 150° C., and the high-temperature working medium circulating fluid can be evaporated; S2: The evaporated gas enters the steam pipe (18) and drives the steam turbine (19) to rotate. The steam turbine (19) transmits power to the generator (21) while rotating. The steam condenses when it encounters cold to produce distilled water, which is discharged into the main water tank (4) through the pipe at the bottom of the plate heat exchanger (22) for storage, thus achieving a circulation effect; S3: simultaneously starting the booster pump (6), the booster pump (6) pumps the working medium circulating fluid in the auxiliary water tank (5) into the second water pipe (16), injects the circulating heat conducting pipe (24) through the second water pipe (16), and absorbs the heat emitted from the surface of the steam pipe (18) through the circulating heat conducting pipe (24), thereby achieving the effect of fully utilizing the heat energy; S4: When the external environment is in a low temperature state, the rising state of the steam will be affected. At this time, the driving motor (11) can be started to drive the ball valve (13) to rotate to close the first circulation pipe (7) and connect the opening (14) with the first water pipe (10) and the second water pipe (16). At this time, the booster pump (6) can be started again, and the hot water in the geothermal pipe (2) can be pumped out through the booster pump (6) in cooperation with the second circulation pipe (8), and the hot water is injected into the auxiliary water tank (5) to realize the utilization of thermal energy.

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