Efficient heat extraction device for supercritical carbon dioxide
By installing heat pipes and baffles between the high-pressure chamber and the low-pressure chamber, the problem of heat exchanger corrosion was solved, achieving efficient heat extraction and equipment miniaturization, thus improving the reliability and economy of the carbon dioxide refrigeration system.
Patent Information
- Application Number
- CN202422678040.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-11-04
AI Technical Summary
In carbon dioxide refrigeration systems, heat exchange tubes are susceptible to corrosion from concentrated brine, leading to unstable equipment operation and requiring large equipment size and high investment.
A high-efficiency supercritical carbon dioxide heat extraction device is designed. By installing heat pipes between the high-pressure chamber and the low-pressure chamber, and arranging baffles and fins in each chamber, the high-pressure carbon dioxide and low-pressure concentrated brine are isolated and circulated for heat exchange, thus slowing down corrosion.
This improved the reliability and heat exchange efficiency of the device, reduced equipment size and investment costs, and ensured the stable operation of the system.
Smart Images
Figure CN223470352U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat transfer technical field especially relates to a supercritical carbon dioxide high -efficient heat extraction device. BACKGROUND
[0002] In the carbon dioxide transcritical refrigeration cycle, the heat release process of carbon dioxide occurs in the supercritical region, and the heat exchange is sensible heat. Compared with liquid, the specific volume of carbon dioxide gas is larger, which makes the heat exchanger need larger heat exchange area to meet the demand of refrigerating capacity. Therefore, in the carbon dioxide refrigeration cycle, the equipment volume of the gas cooler is usually large, which is often limited by space in actual engineering application and also increases the equipment investment. Therefore, the heat transfer of the carbon dioxide gas cooler needs to be strengthened to reduce the equipment size and reduce the equipment investment.
[0003] Currently, the industry is studying the combination of the heat release process of the supercritical carbon dioxide of the refrigeration system and the industrial concentrated salt wastewater treatment. The industrial concentrated salt wastewater contains Cl - , F - , etc., has high concentration (TDS is 100,000-300,000 mg / l), and has strong corrosion. Zero emission is generally achieved by heating evaporation, which requires a large amount of heat and has high cost of heat source. At the same time, the carbon dioxide condensing heat recovery has good conditions and high heat release efficiency, which can provide heat source for high-concentration salt water treatment and realize waste heat utilization.
[0004] However, since the supercritical carbon dioxide has very high pressure, generally 8 MPa-14 MPa, and the corrosion of the near-saturated salt water is very large, if the heat exchange tube is corroded and leaks, it will seriously affect the operation of the carbon dioxide refrigeration system. INVENTION CONTENTS
[0005] The utility model provides a supercritical carbon dioxide high -efficient heat extraction device to solve the defect that the heat exchange tube of the carbon dioxide refrigeration system in prior art is corroded and leaks, realizes the corrosion of the concentrated salt water medium to the heat pipe is slowed down, and the reliability of the device is improved.
[0006] The utility model provides a supercritical carbon dioxide high -efficient heat extraction device, which comprises:
[0007] A high-pressure cavity is filled with flowing carbon dioxide medium;
[0008] A low-pressure cavity is arranged above the high-pressure cavity, and the low-pressure cavity is filled with flowing concentrated salt water medium;
[0009] A heat pipe is sealed between the high-pressure cavity and the low-pressure cavity, and has a carbon dioxide section and a concentrated brine section, the carbon dioxide section is arranged in the high-pressure cavity, the concentrated brine section is arranged in the low-pressure cavity, and the heat pipe is suitable for circulating heat exchange between the low-pressure cavity and the high-pressure cavity.
[0010] The supercritical carbon dioxide efficient heat extraction device further comprises a baffle plate arranged in the high-pressure cavity and the low-pressure cavity to prolong the flow path of the carbon dioxide medium in the high-pressure cavity and the flow path of the concentrated brine medium in the low-pressure cavity.
[0011] The baffle plate is arranged parallel to the extension direction of the heat pipe.
[0012] Alternatively, the baffle plate is arranged perpendicular to the extension direction of the heat pipe.
[0013] The supercritical carbon dioxide efficient heat extraction device further comprises fins arranged on the outer circumferential wall of the carbon dioxide section, and the fins are uniformly distributed along the circumferential direction and the vertical direction of the carbon dioxide.
[0014] The fins comprise any one of a plate fin, a needle fin or a spiral fin.
[0015] The supercritical carbon dioxide efficient heat extraction device comprises a low-pressure shell, a high-pressure shell and a partition plate, the low-pressure shell and the high-pressure shell are respectively arranged on opposite sides of the partition plate, the low-pressure cavity is formed in the low-pressure shell, the high-pressure cavity is formed in the high-pressure shell, the heat pipe is arranged on the partition plate so that the carbon dioxide section is arranged in the high-pressure cavity and the concentrated brine section is arranged in the low-pressure cavity.
[0016] The low-pressure shell is provided with a liquid inlet and a liquid outlet communicated with the low-pressure cavity, and the high-pressure shell is provided with a gas inlet and a gas outlet communicated with the high-pressure cavity, wherein the gas inlet, the gas outlet and the high-pressure cavity jointly form a first flow path for the carbon dioxide medium, the liquid inlet, the liquid outlet and the low-pressure cavity jointly form a second flow path for the concentrated brine medium, and the flow directions of the first flow path and the second flow path are opposite.
[0017] The low-pressure shell is additionally provided with a pollution discharge opening, and the pollution discharge opening is communicated with the low-pressure cavity.
[0018] The high-pressure shell is in a hemispherical shape, and the supercritical carbon dioxide high-efficiency heat extraction device further comprises a plurality of supporting legs, and the plurality of supporting legs are arranged on the outer peripheral wall of the high-pressure shell.
[0019] The supercritical carbon dioxide high-efficiency heat extraction device further comprises a working medium detection unit, and the working medium detection unit is suitable for detecting the concentration of impurity content in the carbon dioxide medium in the high-pressure cavity.
[0020] The supercritical carbon dioxide high-efficiency heat extraction device provided by the utility model realizes high pressure and corrosion at different times, slows down the corrosion of the concentrated brine medium on the heat pipe, and improves the reliability of the device. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.
[0022] Figure 1 It is a structure schematic view of a supercritical carbon dioxide high-efficiency heat extraction device embodiment of the utility model.
[0023] Figure 2 It is Figure 1 A-A cross-sectional view in the middle.
[0024] Figure 3 It is Figure 1 The heat pipe structure schematic view in the middle.
[0025] Figure 4 It is Figure 1 The heat pipe structure schematic view in the middle.
[0026] Figure 5 It is a low-pressure cavity baffle structure schematic view of another type of the supercritical carbon dioxide high-efficiency heat extraction device of the utility model.
[0027] Reference signs:
[0028] 1, heat pipe; 2, low-pressure shell; 3, low-pressure cavity; 4, concentrated brine section; 5, partition plate; 6, carbon dioxide section; 7, high-pressure shell; 8, leg; 9, high-pressure side baffle; 10, high-pressure cavity; 11, blowdown; 12, low-pressure side baffle; 13, liquid inlet; 14, liquid outlet; 15, gas inlet; 16, gas outlet; 17, liquid working medium; 18, gas working medium; 19, fin; 20, working medium detection unit. DETAILED DESCRIPTION
[0029] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.
[0030] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0031] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0032] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0033] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present embodiment. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification and the features of different embodiments or examples without contradiction.
[0034] The supercritical carbon dioxide efficient heat extraction device provided by the embodiments of the present application will be described in detail below in combination with specific embodiments and application scenarios. Figures 1 to 5
[0035] In the embodiments of the present application, with reference to Figures 1 to 3 The supercritical carbon dioxide efficient heat extraction device comprises a high-pressure cavity 10, a low-pressure cavity 3 and a heat pipe 1, the high-pressure cavity 10 is filled with flowing carbon dioxide medium; the low-pressure cavity 3 is arranged above the high-pressure cavity 10, the low-pressure cavity 3 is filled with flowing concentrated brine medium; the heat pipe 1 is sealed and arranged between the high-pressure cavity 10 and the low-pressure cavity 3, the heat pipe 1 has a carbon dioxide section 6 and a concentrated brine section 4, the carbon dioxide section 6 is arranged in the high-pressure cavity 10, the concentrated brine section 4 is arranged in the low-pressure cavity 3, and the heat pipe 1 is suitable for circulating heat exchange between the low-pressure cavity 3 and the high-pressure cavity 10.
[0036] The high-pressure cavity 10 is suitable for containing carbon dioxide in a supercritical state. Supercritical carbon dioxide has a large specific volume and needs to flow in a cavity that can withstand high pressure. The high-pressure cavity 10 needs to have sufficient strength to withstand the high pressure of carbon dioxide, and the general design pressure range is between 9-14MPa.
[0037] The low-pressure cavity 3 is suitable for containing flowing concentrated brine. Concentrated brine has high corrosiveness and needs to work in a low-pressure environment. The design pressure of the low-pressure cavity 3 is relatively low, generally within the range of 0.1-0.3MPa, and the cavity material needs to have good corrosion resistance. The low-pressure cavity 3 is arranged above the high-pressure cavity 10, which is convenient for the arrangement of the heat pipe 1.
[0038] The heat pipe 1 is a kind of efficient heat transfer element, which transfers heat through the phase change process of the working fluid (such as ammonia, ethylene glycol, etc.) inside it. The heat pipe 1 can adopt a square arrangement.
[0039] The heat pipe 1 is designed as a carbon dioxide section and a concentrated brine section 4, the concentrated brine section 4 is located in the high-pressure cavity 10, and the concentrated brine section 4 is located in the low-pressure cavity 3. The heat pipe 1 passes through the partition plate 5 between the high-pressure cavity 10 and the low-pressure cavity 3 in a sealed manner, ensuring that no fluid leaks into the cavity of the other party. The heat pipe 1 releases heat in the concentrated brine section 4 after absorbing heat in the carbon dioxide section, thereby achieving heat transfer.
[0040] With reference to Figure 3 Optionally, the working medium in the heat pipe 1 can be low-boiling-point ammonia, ethylene glycol, freon, ethane, etc. The working medium will be converted into gaseous working medium 18 after absorbing heat, and will be converted into liquid working medium 17 after completing heat release.
[0041] The present application isolates high-pressure carbon dioxide and low-pressure concentrated brine by providing a high-pressure cavity 10 and a low-pressure cavity 3, and the heat pipe 1 is sealed between the high-pressure cavity 10 and the low-pressure cavity 3, and circulates and exchanges heat between the low-pressure cavity 3 and the high-pressure cavity 10, thereby realizing the occurrence of high pressure and corrosion at different times, slowing down the corrosion of the concentrated brine medium on the heat pipe 1, and improving the reliability of the device.
[0042] With reference to Figure 1 And Figure 2 In some embodiments, the supercritical carbon dioxide high-efficiency heat extraction device further comprises a baffle, the baffle being arranged in the high-pressure cavity 10 and the low-pressure cavity 3 to lengthen the flow path of the carbon dioxide medium in the high-pressure cavity 10 and the flow path of the concentrated brine medium in the low-pressure cavity 3.
[0043] It can be understood that the baffle can include a low-pressure side baffle 12 and a high-pressure side baffle 9, wherein the low-pressure side baffle 12 is arranged in the low-pressure cavity 3, and the high-pressure side baffle 9 is arranged on the high-pressure side. The high-pressure side baffle 9 can change the flow path of the carbon dioxide in the high-pressure cavity 10, lengthen the flow path, and increase the contact time and area of the carbon dioxide and the heat pipe 1, thereby improving the heat exchange efficiency. Similarly, the low-pressure side baffle 12 can increase the contact time and area of the concentrated brine and the heat pipe 1 in the low-pressure cavity 3, and strengthen the heat exchange effect.
[0044] In the present embodiment, the baffle can help the fluid to be more uniformly distributed in the cavity, avoiding the occurrence of local overheating or uneven heat exchange. At the same time, by changing the direction of the fluid flow, the degree of turbulence of the fluid can be increased, further improving the heat exchange coefficient.
[0045] With reference to Figure 1 And Figure 5 In some embodiments, the baffle is arranged parallel to the extension direction of the heat pipe 1; or the baffle is arranged perpendicular to the extension direction of the heat pipe 1.
[0046] It can be understood that in the embodiment, multiple baffles can be arranged in the high-pressure cavity 10 to make the flow path of the carbon dioxide more tortuous and increase the contact area with the heat pipe 1. The baffles can be arranged perpendicular to the heat pipe 1 to form alternating flow directions and increase the degree of turbulence.
[0047] Similarly, multiple baffles are arranged in the low-pressure cavity 3 to make the flow path of the concentrated brine more complex and increase the contact time with the heat pipe 1. The baffles can be arranged parallel to the heat pipe 1 or perpendicular to the heat pipe 1, depending on the design of the optimal heat exchange path.
[0048] Referring to Figure 1 and Figure 3 In some embodiments, the outer peripheral wall of the carbon dioxide section 6 is provided with fins 19, which are uniformly distributed in the circumferential direction of the carbon dioxide and the vertical direction.
[0049] It can be understood that the embodiment can significantly increase the heat exchange area by arranging fins 19 on the outer peripheral wall of the carbon dioxide section, thereby improving the heat exchange efficiency between the heat pipe 1 and the carbon dioxide. The fins 19 are uniformly distributed in the circumferential direction of the carbon dioxide section and the vertical direction, which can ensure good heat exchange performance on the entire surface of the heat pipe 1 and avoid local overheating or insufficient heat exchange. The presence of the fins 19 can also enhance the degree of turbulence of the fluid, making the fluid contact the surface of the heat pipe 1 more closely, thereby further improving the heat exchange efficiency.
[0050] Referring to Figure 4 Optionally, the fins 19 include any one of a plate fin, a needle fin, or a spiral fin.
[0051] Referring to Figure 1 In some embodiments, the supercritical carbon dioxide high-efficiency heat extraction device includes a low-pressure shell 2, a high-pressure shell 7, and a partition plate 5. The low-pressure shell 2 and the high-pressure shell 7 are arranged on opposite sides of the partition plate 5, respectively. The low-pressure shell 2 forms a low-pressure cavity 3, and the high-pressure shell 7 forms a high-pressure cavity 10. The heat pipe 1 is arranged on the partition plate 5, so that the carbon dioxide section 6 is located in the high-pressure cavity 10, and the concentrated brine section 4 is located in the low-pressure cavity 3.
[0052] It can be understood that the low-pressure shell 2 encloses the low-pressure cavity 3 to contain the flowing concentrated brine medium. The low-pressure shell 2 needs to withstand a relatively low pressure, and the design pressure range is generally between 0.1-0.3 MPa. The material is usually selected from materials with strong corrosion resistance, such as TA2 or 2205 stainless steel. The low-pressure shell 2 is designed to withstand a relatively low pressure, and the shell thickness is relatively thin, so that low-cost materials can be used. The liquid inlet 13 and the liquid outlet 14 of the low-pressure cavity 3 are arranged in a reverse direction from bottom to top, which is beneficial to the uniform distribution of the fluid and the uniform transfer of heat.
[0053] The high-pressure shell 7 encloses a high-pressure cavity 10, which contains carbon dioxide in a supercritical state. The high-pressure shell 7 needs to withstand high pressure, and the design pressure is generally between 9-14 MPa. The design of the high-pressure shell 7 needs to ensure sufficient strength and sealing. The high-pressure shell 7 is designed to withstand high pressure, and the shell adopts a hemispherical design to enhance the pressure-bearing capacity and reduce the wall thickness, thereby saving costs. The gas inlet 15 and the gas outlet 16 of the high-pressure cavity 10 are arranged in an upper-in and lower-out manner to facilitate uniform distribution of carbon dioxide and uniform heat transfer.
[0054] The partition plate 5 separates the low-pressure shell 2 and the high-pressure shell 7 to form two independent cavities. The partition plate 5 needs to have sufficient strength to withstand the pressure of the high-pressure cavity 10 and needs to ensure the sealing of the heat pipe 1.
[0055] The heat pipe 1 transfers heat through the phase change process of the working fluid (such as ammonia, ethylene glycol, etc.) inside it. The heat pipe 1 passes through the partition plate 5, with the carbon dioxide section located in the high-pressure cavity 10 and the concentrated brine section 4 located in the low-pressure cavity 3.
[0056] Referring to Figure 1 In some embodiments, the low-pressure shell 2 is provided with a liquid inlet 13 and a liquid outlet 14 that communicate with the low-pressure cavity 3, and the high-pressure shell 7 is provided with a gas inlet 15 and a gas outlet 16 that communicate with the high-pressure cavity 10. The gas inlet 15, the gas outlet 16, and the high-pressure cavity 10 collectively form a first flow path for the flow of carbon dioxide medium. The liquid inlet 13, the liquid outlet 14, and the low-pressure cavity 3 collectively form a second flow path for the flow of concentrated brine medium, and the flow directions of the first flow path and the second flow path are opposite.
[0057] It can be understood that the flow directions of the first flow path and the second flow path are opposite, i.e., the flow directions of the carbon dioxide medium and the concentrated brine medium are opposite. This counter-flow design can maximize the heat exchange efficiency, because under counter-flow conditions, the temperature difference between the two media can be maintained for a longer period of time, which is beneficial for heat transfer.
[0058] Referring to Figure 1 and Figure 5 In some embodiments, the low-pressure shell 2 is also provided with a blowdown port 11 that communicates with the low-pressure cavity 3.
[0059] It can be understood that during long-term operation, some solid particles, deposits or other impurities may accumulate in the low-pressure cavity 3. These impurities may affect the heat exchange efficiency and even cause damage to the device. Through the blowdown port 11, these impurities can be periodically or irregularly removed to keep the low-pressure cavity 3 clean. At the same time, the blowdown port 11 also provides convenience for maintenance and repair of the device. When it is necessary to enter the low-pressure cavity 3 for maintenance or repair, the medium in the low-pressure cavity 3 can be discharged through the blowdown port 11 to reduce the difficulty and risk of operation.
[0060] Referring to Figure 1 In some embodiments, the high-pressure shell 7 is in a semi-spherical shape, and the supercritical carbon dioxide high-efficiency heat extraction device further comprises a plurality of legs 8 arranged on the outer peripheral wall of the high-pressure shell 7.
[0061] It can be understood that the high-pressure shell 7 adopts a semi-spherical design, which can provide stronger pressure-bearing capacity, because the semi-spherical structure can uniformly disperse stress when bearing internal high pressure, reducing local stress concentration. Since the semi-spherical structure itself has high structural strength, the wall thickness can be reduced while ensuring the pressure-bearing capacity, thereby saving material costs. The semi-spherical design makes the high-pressure shell 7 more compact and occupies less space, which is suitable for use in environments with limited space.
[0062] The plurality of legs 8 can be uniformly distributed on the outer peripheral wall of the high-pressure shell 7 to ensure good stability of the device when placed.
[0063] Referring to Figure 1 In some embodiments, the supercritical carbon dioxide high-efficiency heat extraction device further comprises a working medium detection unit 20 adapted to detect the concentration of impurity content in the carbon dioxide medium in the high-pressure cavity 10.
[0064] It can be understood that the working medium detection unit 20 can accurately measure the content of impurities such as water and salt in the gas at the carbon dioxide gas outlet 16. If the content of these impurities is too high, it may cause corrosion to the heat pipe 1, shorten its service life, or even cause perforation, affecting the operation of the entire system. Through regular detection, the trend of change in the content of impurities in carbon dioxide can be discovered in a timely manner, so that necessary measures such as adjusting the process flow, replacing the medium or cleaning can be taken to prevent the heat pipe 1 from being corroded.
[0065] The working medium detection unit 20 can ensure the purity and quality of carbon dioxide, thereby ensuring the stability and efficiency of the cycle. According to the data provided by the working medium detection unit 20, a more scientific and reasonable maintenance strategy can be developed, such as periodically discharging carbon dioxide containing more impurities and adding new carbon dioxide to maintain the optimal operating state of the system.
[0066] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A supercritical carbon dioxide high-efficiency heat extraction device, characterized by, The application relates to a supercritical carbon dioxide high-efficiency heat extraction device. The supercritical carbon dioxide high-efficiency heat extraction device comprises a high-pressure cavity filled with flowing carbon dioxide medium, a low-pressure cavity arranged above the high-pressure cavity and filled with flowing concentrated brine medium, and a heat pipe sealedly arranged between the high-pressure cavity and the low-pressure cavity, wherein the heat pipe has a carbon dioxide section arranged in the high-pressure cavity and a concentrated brine section arranged in the low-pressure cavity, and the heat pipe is adapted to circulate heat between the low-pressure cavity and the high-pressure cavity. The supercritical carbon dioxide high-efficiency heat extraction device further comprises baffles arranged in the high-pressure cavity and the low-pressure cavity to prolong the flow path of the carbon dioxide medium in the high-pressure cavity and the flow path of the concentrated brine medium in the low-pressure cavity. The baffles are arranged parallel to the extension direction of the heat pipe.
2. The supercritical carbon dioxide high-efficiency heat extraction device according to claim 1, characterized by, Alternatively, the baffles are arranged perpendicular to the extension direction of the heat pipe.
3. The supercritical carbon dioxide high-efficiency heat extraction device according to claim 2, characterized by, Fins are arranged on the outer circumferential wall of the carbon dioxide section, and the fins are uniformly distributed in the circumferential direction of the carbon dioxide and the vertical direction. The fins comprise any one of plate fins, needle fins or spiral fins.
4. The supercritical carbon dioxide high-efficiency heat extraction device according to claim 1, characterized by, The supercritical carbon dioxide high-efficiency heat extraction device comprises a low-pressure shell, a high-pressure shell and a partition plate, the low-pressure shell and the high-pressure shell are arranged on opposite sides of the partition plate, the low-pressure cavity is formed in the low-pressure shell, the high-pressure cavity is formed in the high-pressure shell, and the heat pipe is arranged on the partition plate so that the carbon dioxide section is arranged in the high-pressure cavity and the concentrated brine section is arranged in the low-pressure cavity.
5. The supercritical carbon dioxide high-efficiency heat extraction device according to claim 4, characterized by, The low-pressure shell is provided with a liquid inlet and a liquid outlet which are in communication with the low-pressure cavity, and the high-pressure shell is provided with a gas inlet and a gas outlet which are in communication with the high-pressure cavity, wherein the gas inlet, the gas outlet and the high-pressure cavity jointly form a first flow path for the carbon dioxide medium, the liquid inlet, the liquid outlet and the low-pressure cavity jointly form a second flow path for the concentrated brine medium, and the flow directions of the first flow path and the second flow path are opposite.
6. The supercritical carbon dioxide high-efficiency heat extraction device according to any one of claims 1-5, characterized in that, The low-pressure shell is further provided with a blowdown port which is in communication with the low-pressure cavity.
7. The supercritical carbon dioxide high-efficiency heat extraction device according to claim 6, characterized by, The high-pressure shell is in a semispherical shape, and the supercritical carbon dioxide high-efficiency heat extraction device further comprises a plurality of supporting legs arranged on the outer circumferential wall of the high-pressure shell.
8. The supercritical carbon dioxide high-efficiency heat extraction device according to claim 6, characterized by, The supercritical carbon dioxide high-efficiency heat extraction device further comprises a working medium detection unit adapted to detect the concentration of impurity content in the carbon dioxide medium in the high-pressure cavity.
9. The supercritical carbon dioxide high-efficiency heat extraction device according to claim 6, characterized by, 10. The supercritical carbon dioxide high-efficiency heat extraction device according to any one of claims 1-5, characterized in that,