A deep geothermal utilization device and a method of using the same

Abstract

The present invention provides a deep geothermal utilization device and a method for using the device, including a tube shell, an upper end cover and a lower end cover, an inner sleeve is welded inside the tube shell, a liquid storage cavity is formed between the inner sleeve and the tube shell, a drainage piece is provided at the bottom of the inner sleeve, the top is closed, and the top of the inner sleeve passes through the upper end cover and extends into the heat exchange component; the drainage piece includes a conical cover, a plurality of steam channels are provided on the conical cover, and a drainage hole is provided at the bottom of the conical cover. The device forms steam after water is heated by deep geothermal heat, releases heat and condenses into water, and then falls to the deep geothermal position again for heating, thereby forming a cyclic geothermal utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of geothermal development, and in particular to a deep geothermal utilization device and a method of using the same. Background Art

[0002] Geothermal energy is natural heat extracted from the earth's crust. This energy comes from the molten rock inside the earth and exists in the form of heat. It is the energy that causes volcanic eruptions and earthquakes. The simplest and most cost-effective way to use geothermal energy is to directly access these heat sources and extract their energy. Due to the limitations of the utilization of deep geothermal energy, it will face a variety of usage situations when it is used, but it is not limited to the one proposed below. More specifically, especially for the utilization of deep geothermal energy, a permeable artificial heat reservoir is built in dry hot rocks through hydraulic fracturing and other means, and then connected to the underground heat reservoir through at least two wells, and then water is injected into the underground heat reservoir through one of the wells, and then it is developed and utilized by flowing out from another well after absorbing heat.

[0003] However, the above-mentioned deep geothermal utilization methods involve large-scale storage and drilling projects, which require a large amount of upfront investment, and there are also technical problems such as fluid leakage, severe scaling, and heat storage short circuit.

[0004] Combining the above-mentioned problems, we can find that it is difficult to avoid the above-mentioned problems when using the existing deep geothermal utilization devices on the market, thus failing to achieve the desired effect. Therefore, we propose a deep geothermal utilization device that can directly utilize geothermal energy without building geothermal utilization wells, and injects water in a closed circulation mode, thereby avoiding technical problems such as fluid leakage, severe scaling, and heat storage short circuit. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a deep geothermal utilization device and a method of using the same, in which water is heated by deep geothermal heat to form steam, releases heat and condenses into water, and then falls back to the deep geothermal position for heating, thereby forming a cycle of geothermal utilization.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a deep geothermal utilization device, including a tube shell, an upper end cover and a lower end cover, an inner sleeve is welded inside the tube shell, a liquid storage chamber is formed between the inner sleeve and the tube shell, a drainage piece is provided at the bottom of the inner sleeve, and the top is closed, and the top of the inner sleeve passes through the upper end cover and extends into the heat exchange component; the drainage piece includes a conical cover, a plurality of steam channels are provided on the conical cover, and a drainage hole is opened at the bottom of the conical cover.

[0007] In a preferred solution, ribs are provided around the steam channel, and drainage channels are formed between the ribs.

[0008] In a preferred solution, the inner sleeve includes a main body layer, an inner wall of the main body layer is provided with a heat insulating layer, and an inner wall of the heat insulating layer is provided with a high temperature resistant layer.

[0009] In a preferred embodiment, the heat insulating layer is a ceramic coating, and the high temperature resistant layer is an organic silicon high temperature resistant paint.

[0010] In a preferred solution, the inner wall of the lower end cover is welded with heat transfer fins, and the number of heat transfer fins is several and they are arranged to fit the shape of the lower end cover.

[0011] In a preferred embodiment, the heat exchange component includes a shell, a fixed shell is provided at one end of the shell, a partition is provided inside the fixed shell, the partition divides the interior of the fixed shell into a liquid inlet chamber and a liquid outlet chamber, the liquid inlet chamber and the liquid outlet chamber are both provided with through holes connected to the fixed shell, a plurality of heat exchange fins are provided inside the shell, and the heat exchange fins are sleeved on the surface of the inner sleeve, a guide plate is provided inside the fixed shell, a liquid inlet is provided at the top of the fixed shell, and a discharge member is provided at the bottom.

[0012] In a preferred embodiment, the heat exchange fins are stacked and sleeved on the surface of the inner sleeve, and are distributed at a certain distance between two adjacent heat exchange fins. A number of heat conduction blocks are provided between the opposite sides of two adjacent heat exchange fins, and the top and bottom heat exchange fins are connected to the inner wall of the shell through fixing blocks.

[0013] In a preferred embodiment, the discharge member includes a fixed column, a temporary storage cavity is provided at the upper end of the fixed column, a plurality of liquid inlet holes connected to the temporary storage cavity are provided at the top of the fixed column, the temporary storage cavity is connected to the discharge cavity through a stepped hole, a deformable body is provided in the temporary storage cavity, the deformable body is a thermal expansion and contraction material, a push plate is bolted to the bottom of the deformable body, the bottom of the push plate is connected to the moving column, a reset spring is mounted on the outside of the moving column, the moving column is connected to the blocking block through a connecting column, a blocking plate is provided in the discharge cavity, and the blocking plate is provided with drainage holes that cooperate with the blocking block.

[0014] In a preferred solution, an arc-shaped guide plate is welded to the top of the partition, and a side of the arc-shaped guide plate close to the inner wall of the fixed shell is welded to the fixed shell.

[0015] The present invention also provides a method for using a deep geothermal utilization device, comprising the following steps:

[0016] Step 1: bury the tube shell below the ground, inject cold water into the liquid storage cavity formed between the tube shell and the inner sleeve, and increase the heat transfer area under the action of the heat transfer fins, so that the deep geothermal heat heats the cold water and generates steam;

[0017] Step 2: The steam will rise in the inner casing through the steam channel until it reaches the top of the inner casing and exchanges heat with the heat exchange component;

[0018] Step 3: The steam in the inner casing rises to the top and dissipates the heat inside the shell through the heat exchange fins. The cold water injected through the liquid inlet cavity flows in the upper layer of the shell under the action of the guide plate and then flows to the lower layer of the shell. In this flow process, it exchanges heat with the steam heat, thereby heating it into domestic hot water.

[0019] Step 4: After releasing heat, the steam condenses into water and flows back to the bottom, so that the condensed water falls into the inside of the cone, and enters the drainage hole through the drainage channel formed between two adjacent ribs and merges with the bottom liquid, so as to realize cyclic geothermal utilization;

[0020] In step five and step three, after the water in the heat exchanger is heated, the deformation body will expand thermally, pushing the push plate and the movable column to move, and driving the sealing block to move downward through the connecting column and separate from the sealing plate, thereby connecting the fluid channel and discharging the hot water from the interior of the fixed shell, achieving the effect of automatic discharge according to the water temperature.

[0021] The present invention provides a deep geothermal utilization device and a method of using the same, which have the following beneficial effects:

[0022] 1. Since a closed space can be formed between the upper end cover, the lower end cover and the inner casing of the tube shell, and a liquid storage cavity can be formed between the tube shell and the inner casing, water is injected into the liquid storage cavity, and after being heated by deep geothermal energy, steam can be formed. The steam rises to the ground through the inner casing, releases heat in the inner casing and condenses into water, and then falls back to the bottom of the liquid storage cavity, thereby forming a cyclic geothermal utilization, thereby avoiding technical problems such as loss of working fluid, severe scaling, and short circuit of heat storage. In addition, according to the use requirements and geothermal conditions, the steam can be connected to a direct-drive steam turbine for power generation to achieve the effect of multiple utilization.

[0023] 2. By setting up a heat exchange component, the heat exchange component can exchange heat with the rising steam, heat the injected cold water into domestic hot water, and transport it to residential use, thereby achieving the effect of deep geothermal utilization.

[0024] 3. The set discharge parts can discharge the cold water after heat exchange only when it reaches the actual required temperature, thus maximizing the utilization of geothermal heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the connection between the tube shell and the inner sleeve of the present invention;

[0028] Figure 3It is a schematic diagram of the structure of the drainage member of the present invention;

[0029] Figure 4 is an exploded schematic diagram of the inner sleeve of the present invention;

[0030] Figure 5 is a cross-sectional schematic diagram of a heat exchange assembly of the present invention;

[0031] Figure 6 It is a cross-sectional schematic diagram of the discharge member of the present invention.

[0032] In the figure: tube shell 1; upper end cover 2; lower end cover 3; inner sleeve 4, main body layer 401, insulation layer 402, high temperature resistant layer 403; liquid storage chamber 5; drainage member 6, cone 601, steam channel 602, drainage hole 603, retaining edge 604, drainage channel 605; heat exchange component 7, shell 701, fixed shell 702, partition 703, liquid inlet chamber 704, liquid outlet chamber 705, heat exchange fin 706, Guide plate 707, discharge member 708, fixed column 7081, temporary storage chamber 7082, liquid inlet hole 7083, stepped hole 7084, liquid discharge chamber 7085, deformation body 7086, push plate 7087, movable column 7088, connecting column 7089, blocking block 70810, blocking plate 70811, reset spring 70812; heat transfer fin 8; heat conductive block 9; fixed block 10; arc guide plate 11. DETAILED DESCRIPTION

[0033] Embodiment 1:

[0034] like Figures 1 to 4 As shown, a deep geothermal utilization device includes a tube shell 1, an upper end cover 2 and a lower end cover 3. An inner sleeve 4 is welded inside the tube shell 1, and a liquid storage chamber 5 is formed between the inner sleeve 4 and the tube shell 1. When in specific use, a water replenishment port can be provided at the upper end of the tube shell 1 and sealed by a sealing cover to facilitate water replenishment in the liquid storage chamber 5.

[0035] The inner sleeve 4 is provided with a flow guide 6 at the bottom, the top of the inner sleeve 4 is closed, and the top of the inner sleeve 4 passes through the upper end cover 2 and then extends into the heat exchange assembly 7. The inner sleeve 4 is used in conjunction with the heat exchange assembly 7. By setting the heat exchange assembly 7, the heat exchange assembly 7 can exchange heat with the rising steam, heat the injected cold water into domestic hot water, and transport it to the residence for use, so as to achieve the effect of utilizing deep geothermal heat. At the same time, the heat exchange assembly 7 can also discharge the cold water after heat exchange only when it reaches the actual required temperature, so as to maximize the utilization of geothermal heat.

[0036] like Figure 3As shown, the guide member 6 includes a conical cover 601, on which a plurality of steam channels 602 are arranged, and the steam channels 602 are distributed in a ring shape. A drainage hole 603 is opened at the bottom of the conical cover 601, and the drainage hole 603 is located at a lower position in the center, so that the condensed water can flow into the drainage hole 603 along the conical cover 601 and flow back to the liquid storage chamber 5 for reuse.

[0037] Preferably, a rib 604 is provided around the steam channel 602, and a drainage channel 605 is formed between the ribs 604. By providing the rib 604, the condensed water will not flow down from the steam channel 602, and convection with the steam is prevented. The drainage channel 605 guides the condensed water to flow from the drainage hole 603 into the liquid storage chamber 5.

[0038] Since a closed space can be formed between the upper end cover 2, the lower end cover 3 and the inner sleeve 4 of the tube shell 1, and a liquid storage chamber 5 can be formed between the tube shell 1 and the inner sleeve 4, water is injected into the liquid storage chamber 5, and after being heated by deep geothermal energy, steam can be formed, so that the steam rises to the ground through the inner sleeve 4, and the inner sleeve 4 in the heat exchange component 7 releases heat and condenses into water, and then falls back to the bottom of the liquid storage chamber 5, thereby forming a cyclic geothermal utilization, thereby avoiding technical problems such as loss of working fluid, severe scaling, and short circuit of heat storage, and according to the use requirements and geothermal conditions, the steam can be connected to a direct-drive steam turbine for power generation to achieve the effect of multiple utilization.

[0039] Embodiment 2:

[0040] Different from the first embodiment, the inner sleeve 4 comprises a main body layer 401 , the inner wall of the main body layer 401 is provided with a heat insulating layer 402 , and the inner wall of the heat insulating layer 402 is provided with a high temperature resistant layer 403 .

[0041] By arranging the inner sleeve 4 to consist of a main body layer 401, an insulating layer 402 and a high temperature resistant layer 403, the main body layer 401 can ensure the use strength of the inner sleeve 4 to prevent it from being damaged, and the insulating layer 402 can reduce the steam heat loss in the inner sleeve 4, thereby avoiding the transfer to the cold water in the liquid storage chamber 5, thereby ensuring the heat concentration of geothermal utilization, and by setting the high temperature resistant layer 403, the high temperature resistance of the inner sleeve 4 can be enhanced, making it not easily damaged by steam heat, thereby ensuring usability.

[0042] like Figure 4 As shown, the insulation layer 402 is a ceramic coating and is evenly coated on the inner wall of the main layer 401. By setting the insulation layer 402 to be composed of ceramic coating and evenly coating it on the inner wall of the main layer 401, the steam heat loss in the inner sleeve 4 can be reduced, thereby avoiding the transfer to the cold water in the liquid storage chamber 5, thereby ensuring the heat concentration of geothermal utilization.

[0043] The high temperature resistant layer 403 is an organic silicon high temperature resistant paint and is evenly coated on the inner wall of the heat insulating layer 402. By setting the high temperature resistant layer 403 to be composed of organic silicon high temperature resistant paint and evenly coating it on the inner wall of the heat insulating layer 402, the high temperature resistance of the inner sleeve 4 can be enhanced, making it less likely to be damaged by steam heat, thereby ensuring usability.

[0044] Embodiment 3:

[0045] Different from Example 1 and Example 2, Figure 2 As shown, the inner wall of the lower end cover 3 is welded with heat transfer fins 8 , and the number of the heat transfer fins 8 is several and the heat transfer fins 8 are arranged to fit the shape of the lower end cover 3 .

[0046] By providing the heat transfer fins 8, the heat transfer area in the liquid storage chamber 5 can be increased, thereby increasing the heat transfer efficiency and the heat transfer effect, and improving the utilization of deep geothermal energy.

[0047] The above three embodiments disclose a method for using a deep geothermal utilization device, comprising the following steps:

[0048] Step 1: bury the tube shell 1 below the ground, inject cold water into the liquid storage chamber 5 formed between the tube shell 1 and the inner sleeve 4, and increase the heat transfer area under the action of the heat transfer fins 8, so that the deep geothermal heat heats the cold water and generates steam.

[0049] Step 2: The steam rises in the inner sleeve 4 through the steam channel 602 until it rises to the top of the inner sleeve 4 and exchanges heat with the heat exchange component 7.

[0050] Step 3: After releasing heat, the steam condenses into water and flows back to the bottom, so that the condensed water falls into the interior of the cone 601, and enters the drainage hole 603 through the drainage channel 605 formed between two adjacent ribs 604 and merges with the bottom liquid, thereby performing cyclic geothermal utilization.

[0051] Embodiment 4:

[0052] Different from Examples 1 to 3, Figures 5 and 6As shown, the heat exchange component 7 includes a shell 701, a fixed shell 702 is provided at one end of the shell 701, a partition 703 is provided inside the fixed shell 702, the partition 703 divides the inside of the fixed shell 702 into a liquid inlet chamber 704 and a liquid outlet chamber 705, both the liquid inlet chamber 704 and the liquid outlet chamber 705 are provided with through holes connected to the fixed shell 702, a plurality of heat exchange fins 706 are provided inside the shell 701, and the heat exchange fins 706 are sleeved on the surface of the inner sleeve 4, a guide plate 707 is provided in the fixed shell 702, and the fixed shell 702 is divided into two layers, one end of the upper cavity is connected to the liquid inlet chamber 704, and the other end is connected to the lower cavity, and the other end of the lower cavity is connected to the liquid outlet chamber 705, and a liquid inlet is provided at the top of the fixed shell 702, and a discharge member 708 is provided at the bottom.

[0053] By setting up the heat exchange component 7, the steam in the inner sleeve 4 rises to the top, and the heat is dissipated inside the shell 701 through the heat exchange fins 706, and the cold water injected through the liquid inlet chamber 704 flows in the upper layer of the shell 701 under the action of the guide plate 707, and then flows to the lower layer of the shell 701. In this flow process, heat is exchanged with the steam heat, so that it is heated into domestic hot water for residential hot water use, and the steam is condensed by heat release, so that it falls back to the bottom for heating treatment again, and finally the cold water after heat exchange is discharged through the discharge member 708 for use.

[0054] like Figure 5 As shown, the heat exchange fins 706 are stacked on the surface of the inner sleeve 4, and there is a certain distance between two adjacent heat exchange fins 706. A plurality of heat conductive blocks 9 are provided between the opposite sides of two adjacent heat exchange fins 706. The top and bottom heat exchange fins 706 are connected to the inner wall of the shell 701 through fixing blocks 10.

[0055] By arranging the heat exchange fins 706 to be stacked and sleeved on the surface of the inner sleeve 4, and distributing the adjacent two heat exchange fins 706 at a certain interval, the heat exchange area can be expanded, thereby enhancing the heat exchange effect and efficiency. By arranging the heat conductive block 9, on the one hand, the heat exchange area can be further increased to make the heat exchange uniform. On the other hand, it can slow down the flow rate of cold water in the shell 701, thereby improving the heat exchange quality. By arranging the fixing block 10, the heat exchange fins 706 can be fixed and the stability of use can be enhanced.

[0056] An arc-shaped guide plate 11 is welded to the top of the partition plate 703 , and a side of the arc-shaped guide plate 11 close to the inner wall of the fixed shell 702 is welded to the fixed shell 702 .

[0057] By providing the arc-shaped guide plate 11, it can guide the cold water when it enters the liquid inlet chamber 704, reduce its pressure damage, and reduce the impact force on the structure, thereby ensuring the stability of the structure in use.

[0058] Embodiment 5:

[0059] Different from Example 4, Figure 6 As shown, the discharge member 708 includes a fixed column 7081, a temporary storage cavity 7082 is provided at the upper end of the fixed column 7081, a plurality of liquid inlet holes 7083 connected with the temporary storage cavity 7082 are provided at the top of the fixed column 7081, the temporary storage cavity 7082 is connected with the discharge cavity 7085 through a stepped hole 7084, a deformation body 7086 is provided in the temporary storage cavity 7082, the deformation body 7086 is a thermal expansion and contraction material, and is arranged in a wave shape. In a specific implementation, the deformation body 7086 can be made of rubber, and the effect of discharging the fluid can be achieved according to the water temperature.

[0060] The bottom of the deformation body 7086 is bolted to the push plate 7087, and the bottom of the push plate 7087 is connected to the movable column 7088. The outer side of the movable column 7088 is provided with a return spring 70812, and the stepped hole 7084 supports it. The movable column 7088 is connected to the blocking block 70810 through the connecting column 7089. A blocking plate 70811 is provided in the drainage cavity 7085, and a drainage hole cooperating with the blocking block 70810 is provided on the blocking plate 70811. The blocking block 70810 is an inverted "T" shaped structure, and the flow channel can be blocked by plugging it in the drainage hole cooperating with the blocking block 70810.

[0061] The heated water will enter the temporary storage chamber 7082. At this time, the heat of the heated water will cause the deformation body 7086 to expand, pushing the push plate 7087 and the movable column 7088 to move, and driving the blocking block 70810 to move downward through the connecting column 7089 and separate from the blocking plate 70811. Therefore, the fluid channel is connected, and the hot water is discharged from the interior of the fixed shell 702, which can achieve the effect of automatic discharge according to the water temperature, and when the water temperature does not meet the use requirements, the discharge of hot water can be temporarily suspended, thereby improving the utilization effect of geothermal energy and enhancing the utilization rate.

[0062] A method for using the deep geothermal utilization device of the above-mentioned embodiment 4 and embodiment 5 comprises the following steps:

[0063] Step 1: bury the tube shell 1 below the ground, inject cold water into the liquid storage chamber 5 formed between the tube shell 1 and the inner sleeve 4, and increase the heat transfer area under the action of the heat transfer fins 8, so that the deep geothermal heat heats the cold water and generates steam.

[0064] Step 2: The steam rises in the inner sleeve 4 through the steam channel 602 until it rises to the top of the inner sleeve 4 and exchanges heat with the heat exchange component 7.

[0065] Step 3: The steam in the inner sleeve 4 rises to the top and dissipates the heat inside the shell 701 through the heat exchange fins 706. The cold water injected through the liquid inlet chamber 704 flows in the upper layer of the shell 701 under the action of the guide plate 707, and then flows to the lower layer of the shell 701. During this flow process, it exchanges heat with the steam heat, thereby heating it into domestic hot water.

[0066] Step 4: After releasing heat, the steam condenses into water and flows back to the bottom, so that the condensed water falls into the interior of the cone 601, and enters the drainage hole 603 through the drainage channel 605 formed between two adjacent retaining edges 604 and merges with the bottom liquid, thereby performing cyclic geothermal utilization.

[0067] In step five and step three, after the water in the heat exchanger is heated, the deformation body 7086 will expand due to heat, so that it pushes the push plate 7087 and the movable column 7088 to move, and drives the blocking block 70810 to move downward through the connecting column 7089 and separate from the blocking plate 70811, thereby making the fluid channel connected and discharging the hot water from the interior of the fixed shell 702, so as to achieve the effect of automatic discharge according to the water temperature, and when the water temperature does not meet the use requirements, the discharge of hot water can be temporarily suspended, thereby improving the utilization effect of geothermal energy and enhancing the utilization rate.

Claims

1. A deep geothermal utilization device, comprising a tube shell (1), an upper end cover (2) and a lower end cover (3), characterized in that: An inner sleeve (4) is welded inside the tube shell (1), a liquid storage chamber (5) is formed between the inner sleeve (4) and the tube shell (1), a flow guide (6) is provided at the bottom of the inner sleeve (4), and the top is closed, the top of the inner sleeve (4) passes through the upper end cover (2) and then extends into the heat exchange component (7); the flow guide (6) comprises a conical cover (601), a plurality of steam channels (602) are provided on the conical cover (601), and a liquid drainage hole (603) is opened at the bottom of the conical cover (601); the heat exchange component (7) comprises a shell ( 701), a fixed shell (702) is provided at one end of the shell (701), a partition (703) is provided inside the fixed shell (702), the partition (703) divides the inside of the fixed shell (702) into a liquid inlet chamber (704) and a liquid outlet chamber (705), the liquid inlet chamber (704) and the liquid outlet chamber (705) are both provided with through holes communicating with the fixed shell (702), a plurality of heat exchange fins (706) are provided inside the shell (701), and the heat exchange fins (706) are sleeved on the surface of the inner sleeve (4), and the fixed shell (702) ) is provided with a guide plate (707), a liquid inlet is provided at the top of the fixed shell (702), and a discharge member (708) is provided at the bottom, the discharge member (708) comprises a fixed column (7081), a temporary storage cavity (7082) is provided at the upper end of the fixed column (7081), a plurality of liquid inlet holes (7083) connected to the temporary storage cavity (7082) are provided at the top of the fixed column (7081), the temporary storage cavity (7082) is connected to the discharge cavity (7085) through a stepped hole (7084), and a deformation body (7085) is provided in the temporary storage cavity (7082). 086), the deformation body (7086) is made of a thermal expansion and contraction material, the bottom of the deformation body (7086) is bolted to a push plate (7087), the bottom of the push plate (7087) is connected to a moving column (7088), a return spring (70812) is mounted on the outer side of the moving column (7088), the moving column (7088) is connected to a blocking block (70810) through a connecting column (7089), a blocking plate (70811) is provided in the drainage cavity (7085), and a drainage hole cooperating with the blocking block (70810) is provided on the blocking plate (70811).

2. A deep geothermal utilization device according to claim 1, characterized in that: A rib (604) is provided around the steam channel (602), and a drainage channel (605) is formed between the ribs (604).

3. The deep geothermal utilization device according to claim 1, characterized in that: The inner sleeve (4) comprises a main body layer (401), the inner wall of the main body layer (401) is provided with a heat insulating layer (402), and the inner wall of the heat insulating layer (402) is provided with a high temperature resistant layer (403).

4. A deep geothermal utilization device according to claim 3, characterized in that: The heat insulating layer (402) is a ceramic coating, and the high temperature resistant layer (403) is an organic silicon high temperature resistant paint.

5. The deep geothermal utilization device according to claim 1, characterized in that: The inner wall of the lower end cover (3) is welded with a plurality of heat transfer fins (8) which are arranged to fit the shape of the lower end cover (3).

6. The deep geothermal utilization device according to claim 1, characterized in that: The heat exchange fins (706) are stacked and sleeved on the surface of the inner sleeve (4), and two adjacent heat exchange fins (706) are distributed at a certain distance. A plurality of heat conduction blocks (9) are provided between opposite sides of two adjacent heat exchange fins (706), and the top and bottom heat exchange fins (706) are connected to the inner wall of the shell (701) via fixing blocks (10).

7. The deep geothermal utilization device according to claim 1, characterized in that: An arc-shaped guide plate (11) is welded to the top of the partition plate (703), and a side of the arc-shaped guide plate (11) close to the inner wall of the fixed shell (702) is welded to the fixed shell (702).

8. A method for using a deep geothermal utilization device according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: bury the tube shell (1) below the ground, inject cold water into the liquid storage chamber (5) formed between the tube shell (1) and the inner sleeve (4), and increase the heat transfer area under the action of the heat transfer fins (8), so that the deep geothermal heat heats the cold water and generates steam; Step 2: The steam rises in the inner sleeve (4) through the steam channel (602) until it reaches the top of the inner sleeve (4) and exchanges heat with the heat exchange component (7); Step 3: The steam in the inner sleeve (4) rises to the top and dissipates heat inside the shell (701) through the heat exchange fins (706), and the cold water injected through the liquid inlet chamber (704) flows in the upper layer of the shell (701) under the action of the guide plate (707), and then flows to the lower layer of the shell (701), and exchanges heat with the steam during the flow process, thereby heating it into domestic hot water; Step 4: After releasing heat, the steam condenses into water and flows back to the bottom, so that the condensed water falls into the inside of the conical cover (601), passes through the drainage channel (605) formed between two adjacent ribs (604), enters the drainage hole (603), and merges with the bottom liquid, thereby performing cyclic geothermal utilization; In step 5 and step 3, after the water in the heat exchanger is heated, the deformation body (7086) will expand thermally, causing it to push the push plate (7087) and the movable column (7088) to move, and drive the blocking block (70810) to move downward through the connecting column (7089) and separate from the blocking plate (70811), thereby connecting the fluid channel and discharging the hot water from the interior of the fixed shell (702), thereby achieving the effect of automatic discharge according to the water temperature.

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