Liquid carbon dioxide enhanced heat transfer type mining heat pipe device

Abstract

A liquid carbon dioxide enhanced heat transfer type mining heat pipe device comprises a liquid carbon dioxide storage chamber, a conveying circulation pipeline, a superconductive heat pipe and a pressurization refrigeration chamber. The superconductive heat pipe is connected with the liquid CO2 storage chamber and the pressurization refrigeration chamber through a conveying circulating pipeline; a heat pipe body is arranged in the superconductive heat pipe, and a circulating working medium is arranged in the heat pipe body; the liquid carbon dioxide storage chamber is connected with a condensation shell of the superconductive heat pipe through a safety valve I, a liquid flow regulator and a safety valve II; the condensation shell is connected with the pressurization refrigeration chamber through a conveying circulation pipeline and a third safety valve, and the output end of the pressurization refrigeration chamber is connected with the liquid carbon dioxide storage chamber through a fourth safety valve after passing through a gas-liquid flow divider and a pressurizing device. The superconducting cooling device ensures timeliness and continuity of liquid carbon dioxide on superconducting cooling, improves heat transfer efficiency of a high-temperature area in the coal pillar, realizes reutilization of the liquid carbon dioxide, reduces waste of materials, and is convenient to popularize and use.

Description

Technical Field

[0001] The utility model belongs to the technical field of liquid CO2 temperature-controlled superconducting heat transfer devices for mines, and particularly relates to a liquid carbon dioxide enhanced heat transfer type heat pipe device for mines. Background Art

[0002] Fire is one of the mine disasters. About 70% of mine fires are caused by spontaneous combustion of coal. The coal pillars in the tunnels are under great pressure due to the influence of mining depth and mine pressure, which leads to sufficient oxygen supply due to air leakage, which can easily induce spontaneous combustion and oxidation inside the coal body and produce high-temperature points. Once spontaneous combustion is found, it is in the spontaneous combustion period of the coal seam. In field practice, it is difficult to directly determine the location of the fire source inside the coal seam at the early stage of coal seam fire, making early warning of spontaneous combustion of coal pillars more difficult.

[0003] At present, technical personnel usually use the method of index gas detection to detect suspicious areas of spontaneous combustion inside the coal pillar, and drill the area, and use the tentative method of large-scale encirclement and gradual approach to locate the fire source inside the coal pillar. After finding the high-temperature point, water injection, grouting, and excavation of high-temperature coal are used to control the spontaneous combustion of the coal, so as to achieve the purpose of direct fire extinguishing. However, due to the concealment of the fire source of the coal pillar, it is difficult to find the fire source in time at the beginning of the fire. When the spontaneous combustion of the tunnel is discovered by using the index gas concentration, the fire inside the coal pillar has already expanded. Subsequent regional drilling and other tentative methods to determine the fire source will lead to the expansion of the disaster, causing heavy casualties and economic losses.

[0004] Therefore, a liquid carbon dioxide enhanced heat transfer type mining heat pipe device is needed to solve this problem. Utility Model Content

[0005] In order to overcome the above technical problems, the purpose of the utility model is to provide a liquid carbon dioxide enhanced heat transfer type heat pipe device for mining, which uses the working fluid filled in the superconducting heat pipe to cool the heat inside the coal body by heat conduction and heat convection, so as to realize autonomous heat transfer to the high-temperature area inside the coal pillar. When the temperature exceeds the warning range, the liquid carbon dioxide temperature control system is started, and the temperature and pressure sensors cooperate with the safety valve and the liquid carbon dioxide storage chamber, and use the heat exchange between liquid carbon dioxide and the superconducting heat pipe to perform superconducting heat transfer, so as to realize intelligent heat transfer and cooling of the abnormal temperature area inside the coal pillar. In addition, through a series of operations such as gas-liquid diversion and pressurized refrigeration, the timeliness and continuity of the superconducting cooling of the liquid carbon dioxide are guaranteed, the heat transfer efficiency of the high-temperature area inside the coal pillar is improved, and the reuse of liquid carbon dioxide is realized.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A liquid carbon dioxide enhanced heat transfer type heat pipe device for mining, comprising a liquid carbon dioxide storage chamber 1, a transport circulation pipeline 4, a superconducting heat pipe 5 and a pressurized refrigeration chamber 11;

[0008] The superconducting heat pipe 5 is connected to the liquid CO2 storage chamber 1 and the pressurized refrigeration chamber 11 through the transport circulation pipeline 4; a heat pipe body 10 is arranged inside the superconducting heat pipe 5, and a circulating working medium 9 is arranged inside the heat pipe body 10;

[0009] The liquid carbon dioxide storage chamber 1 is connected to the condensation shell 6 of the superconducting heat pipe 5 through the safety valve 1 4-1, the liquid flow regulator 3, and the safety valve 2 4-2;

[0010] The condensing shell 6 is connected to the pressurized refrigeration chamber 11 through the conveying circulation pipeline 4 and the safety valve three 4-3. The output end of the pressurized refrigeration chamber 11 is connected to the liquid carbon dioxide storage chamber 1 through the gas-liquid splitter 12 and the pressurizing device 13 and the safety valve four 4-4.

[0011] Furthermore, the liquid flow regulator 3 is a German RHEONIK RHM015L Coriolis mass flowmeter, which has mining explosion-proof performance and can adjust the liquid flow rate to between 30-100 ml / min, and transport the uniformly flowing liquid carbon dioxide to the condensation shell 6 of the superconducting heat pipe 5.

[0012] Furthermore, the superconducting heat pipe 5 includes a heat pipe body 10 that utilizes the endothermic evaporation, condensation and reflux of the internal working fluid to transfer heat. The inside of the heat pipe body 10 is the circulating working fluid 9, and the outside of the heat pipe body 10 is a condensation shell 6 filled with liquid carbon dioxide for superconducting heat transfer.

[0013] The heat pipe body 10 includes a cylindrical heat absorbing section, an insulating section and a condensing section connected in sequence from bottom to top; the lower section of the heat pipe body 10 is the heat absorbing section, and the circulating working fluid 9 is filled inside the heat absorbing section to perform preliminary heat transfer work. The outer wall of the heat absorbing end of the heat pipe body 10 is provided with a temperature sensor 8, and its detection accuracy is ±0.5°C, which can be used to detect whether the temperature of the external environment exceeds the critical temperature; the middle section of the heat pipe body 10 is the insulating section, and there is no working fluid filled inside the insulating section to ensure that heat is transferred through the phase change evaporation flow of the working fluid to ensure the thermal conductivity of the heat pipe, and the insulating section is bent to facilitate the installation and use of the device; the upper section of the heat pipe body 10 is the condensing section, and there is no working fluid filled inside the condensing section. A condensation shell 6 is installed on its outer wall to perform superconducting heat transfer work.

[0014] The heat pipe body 10 is made of stainless steel, and the outer wall of the heat pipe body is provided with an anti-corrosion coating.

[0015] The circulating working medium 9 is an Al2O3 nanofluid with a filling rate of 30%, which can improve the boiling heat transfer effect of the superconducting heat pipe.

[0016] The temperature sensor 8 is a WR-207 integrated mining temperature sensor, which adopts a silicone rubber sealing structure, is shock-resistant and moisture-resistant, and is suitable for use in the field environment of coal mines. It can be used to detect whether the temperature of the external environment exceeds the critical temperature.

[0017] The condensation shell 6 is a cylindrical shell designed with an insulated explosion-proof double-layer stainless steel. The inner and outer walls of the shell are covered with an anti-corrosion coating. A liquid carbon dioxide inlet 5-1 and an outlet 5-2 are respectively arranged on both sides of the shell to facilitate the liquid carbon dioxide to enter and flow out of the condensation shell 6 for superconducting heat transfer.

[0018] The pressure sensor 7 arranged in the condensing shell 6 is a Bourns BPS130 series high-precision gas pressure sensor, which can be used to monitor whether gaseous carbon dioxide is generated in the condensing shell.

[0019] Furthermore, the pressurized refrigeration chamber 11 includes a vapor-liquid splitter 12 for separating liquid carbon dioxide from carbon dioxide that has undergone phase change and vaporization, and a pressurized refrigerator 13 for converting carbon dioxide gas into liquid carbon dioxide through compression refrigeration; the vapor-liquid splitter 12 is connected to the pressurized refrigerator 13. Carbon dioxide that has undergone phase change and vaporization passes through the gas-liquid splitter 12 to obtain pure carbon dioxide gas, and then enters the pressurized refrigerator 13 to obtain liquid carbon dioxide.

[0020] Furthermore, the liquid carbon dioxide storage chamber 1 is made of double-layer stainless steel, the inner and outer walls are covered with heat-insulating and anti-corrosion coatings, a liquid inlet 1-2 and a liquid outlet 1-1 are arranged on both sides, and a pressure relief valve 2 is arranged on the top;

[0021] The liquid inlet 1-2 is connected to the liquid outlet 11-2 of the pressurized refrigeration chamber 11 through a safety valve 4-4; the liquid outlet 1-1 is connected to the conveying circulation pipeline 4 and the condensation shell 6 through a safety valve 4-1.

[0022] The pressure relief valve 2 can detect the pressure and content of liquid carbon dioxide in the liquid carbon dioxide storage chamber. When the pressure in the liquid carbon dioxide storage chamber is too high, the pressure relief valve 2 opens to relieve pressure, ensuring that the pressure in the carbon dioxide storage chamber is always within a safe pressure range, thereby ensuring normal use of the system.

[0023] Furthermore, the transport circulation pipeline 4 is made of a heat-insulating anti-corrosion pipe material, and is respectively connected to the condensation shell 6, the pressurized refrigeration chamber 11 and the liquid carbon dioxide storage chamber 1.

[0024] The beneficial effects of the utility model.

[0025] 1. The utility model uses a liquid carbon dioxide enhanced heat transfer type mining heat pipe device as the hub, and adopts superconducting heat rod heat transfer technology to guide the hidden heat source inside the coal pillar out of the coal pillar. By reasonably designing the distribution spacing of the superconducting heat rods, the heat deep in the coal pillar can be effectively transferred. The heat pipe heat transfer project does not require grouting materials, and the heat rods can be reused, saving costs.

[0026] 2. The utility model utilizes liquid carbon dioxide, which is non-toxic and has good heat exchange effect, as a cold source, uses temperature to detect the internal temperature of the coal pillar in real time, cooperates with the liquid carbon dioxide storage room and the safety valve, and coordinates the liquid carbon dioxide temperature control superconducting cooling while the superconducting heat rod autonomously transfers heat, thereby realizing rapid and intelligent prevention and control of high-temperature areas in coal mines.

[0027] 3. The utility model uses a pressure sensor to detect the phase change of carbon dioxide in the condensation shell in real time, and uses a pressurized refrigeration chamber to perform gas-liquid diversion and pressurized refrigeration on the carbon dioxide gas and liquid mixture after the endothermic phase change, and finally collects it into the liquid carbon dioxide storage chamber for storage, thereby ensuring that the liquid carbon dioxide can be recycled and greatly reducing the cooling cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the use state of the utility model.

[0029] Figure 2 It is a plan view of the utility model.

[0030] Figure 3 This is a schematic diagram of the installation arrangement of the superconducting heat pipe of the utility model.

[0031] Figure 4 Schematic diagram of the drilling angle of the coal pillar wall of the utility model.

[0032] Figure 5 A schematic diagram of the spacing of boreholes on the coal pillar wall of the utility model.

[0033] Figure 6 This is a schematic diagram of the superconducting heat pipe structure of the utility model.

[0034] Figure 7 This is a schematic diagram of the main structure of the superconducting heat pipe of the utility model.

[0035] Figure 8 This is a schematic diagram of the structure of the liquid carbon dioxide storage chamber of the utility model.

[0036] Fig. 9 This is a schematic diagram of the pressurized refrigeration chamber of the utility model.

[0037] Fig.10 This is a schematic diagram of the conveying circulation pipeline of the utility model.

[0038] Fig.11 It is an operation flow chart of the utility model. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] like Figures 1 to 8 As shown, the utility model is a liquid carbon dioxide enhanced heat transfer type heat pipe device for mining, comprising a liquid carbon dioxide storage chamber 1, a conveying circulation pipeline 4, a superconducting heat pipe 5 and a pressurized refrigeration chamber 11;

[0041] The superconducting heat pipe 5 is connected to the liquid CO2 storage chamber 1 and the pressurized refrigeration chamber 11 through the transport circulation pipeline 4; the heat pipe body 10 in the superconducting heat pipe 5 is evaporated, condensed and refluxed by the internal circulating working medium 9 to initially perform heat transfer work in the high-temperature area inside the coal body, and the pure liquid carbon dioxide liquid in the liquid carbon dioxide storage chamber 1 enters the transport circulation pipeline 4 to the liquid flow regulator 3 through the safety valve 1 4-1, enters the condensation shell 6 of the superconducting heat pipe 5 through the safety valve 2 4-2, and after heat exchange and superconducting heat transfer work with the heat pipe body 10, enters the pressurized refrigeration chamber 11 through the transport circulation pipeline 4 and the safety valve 3 4-3, and after passing through the gas-liquid splitter 12 and the pressurizer 13, it is collected into the liquid carbon dioxide storage chamber 1 through the safety valve 4 4-4 for storage.

[0042] The superconducting heat pipe 5 includes a circulating working medium 9, a heat pipe body 10 that utilizes the heat absorption, evaporation, condensation and reflux of the internal working medium to transfer heat, and a condensation shell 6 filled with liquid carbon dioxide for superconducting heat transfer.

[0043] The heat pipe body 10 includes a cylindrical heat absorption section, an insulation section and a condensation section connected in sequence from bottom to top; the heat absorption section of the heat pipe body 10 is filled with a circulating working fluid 9 to perform preliminary heat transfer work, and the outer wall of the heat absorption end of the heat pipe body 10 is provided with a temperature sensor 8, whose detection accuracy is ±0.5°C, and can be used to detect whether the temperature of the external environment exceeds the critical temperature; the insulation section is bent, and the bending angle is in the range of 110°-150° to facilitate the installation and use of the device; the outer wall of the condensation section of the heat pipe body 10 is installed with a condensation shell 6 to perform superconducting heat transfer work.

[0044] In this example, the condensation shell 6 is an insulated and explosion-proof double-layer stainless steel cylindrical shell, and the inner and outer walls of the shell are covered with anti-corrosion coatings. Liquid carbon dioxide inlet 5-1 and outlet 5-2 are respectively arranged on both sides of the shell to facilitate liquid carbon dioxide to enter and flow out of the condensation shell 6 for superconducting heat transfer.

[0045] The pressurized refrigeration chamber 11 includes a vapor-liquid splitter 12 for separating liquid carbon dioxide from carbon dioxide that has undergone phase change and vaporized, and a pressurized refrigerator 13 for converting carbon dioxide gas into liquid carbon dioxide through compression refrigeration.

[0046] The gas-liquid splitter 12 is connected to the pressurized refrigerator 13. The carbon dioxide that has undergone phase change and vaporization passes through the gas-liquid splitter 12 to obtain pure carbon dioxide gas, and then enters the pressurized refrigerator 13 to obtain liquid carbon dioxide.

[0047] The liquid carbon dioxide storage chamber 1 is made of double-layer stainless steel, with the inner and outer walls covered with heat-insulating and anti-corrosion coatings, with a liquid inlet 1-2 and a liquid outlet 1-1 on both sides, and a pressure relief valve 2 on the top;

[0048] The liquid inlet 1-2 is connected to the pressurized refrigeration chamber 11 through a safety valve 4-4;

[0049] The liquid outlet 1-1 is connected to the conveying circulation pipeline 4 and the condensation shell 6 through a safety valve 4-1;

[0050] The pressure relief valve 2 can detect the pressure and content of liquid carbon dioxide in the liquid carbon dioxide storage chamber. When the pressure in the liquid carbon dioxide storage chamber is too high, the pressure relief valve 2 opens to relieve pressure, ensuring that the pressure in the carbon dioxide storage chamber is always within a safe pressure range, thereby ensuring normal use of the system.

[0051] In this example, the heat pipe body 10 is made of stainless steel, and the outer wall of the heat pipe body is provided with an anti-corrosion coating;

[0052] In this example, the circulating working medium 9 is an Al2O3 nanofluid with a filling rate of 30%, which can improve the boiling heat transfer effect of the superconducting heat pipe.

[0053] In this example, the liquid flow regulator 3 is a German RHEONIK RHM015L Coriolis mass flowmeter, which has mining explosion-proof performance and can adjust the liquid flow rate to between 30-100 ml / min, and transport the uniformly flowing liquid carbon dioxide to the condensation shell 6 of the superconducting heat pipe 5.

[0054] In this example, the temperature sensor 8 is a WR-207 integrated mining temperature sensor, which adopts a silicone rubber sealing structure, is shock-resistant and moisture-resistant, and is suitable for use in underground coal mine environments. It can be used to detect whether the temperature of the external environment exceeds the critical temperature.

[0055] In this example, the pressure sensor 7 provided in the condensing shell 6 is a Burns BPS130 series high-precision gas pressure sensor, which can be used to monitor whether gaseous carbon dioxide is generated in the condensing shell.

[0056] In this example, the transport circulation pipeline 4 is made of an insulating and anti-corrosion pipe material, and is respectively connected to the condensation shell 6, the pressurized refrigeration chamber 11 and the liquid carbon dioxide storage chamber 1.

[0057] In this example, the safety valve 1 4-1, safety valve 2 4-2, safety valve 3 4-3 and safety valve 4 4-4 all use quick-connect adapters, and the valves use German Schmalz SCJMALZ vacuum valves, which accurately control the gas valves and can fully ensure the air tightness and safety of the equipment.

[0058] like Fig.11 As shown, when the utility model is used, it mainly includes the following steps:

[0059] Step 1: Drill holes on the coal pillar wall and install the superconducting heat transfer device for temperature control of liquid carbon dioxide for mining: install the superconducting heat pipe 5 into the pre-drilled hole, and connect the condensing shell 6 to the pressurized refrigeration chamber 11 and the liquid CO2 storage chamber 1 through the conveying circulation pipeline 4.

[0060] Step 2, the superconducting heat pipe 5 starts to transfer heat autonomously: the circulating working medium 9 inside the heat pipe body 10 starts to operate, and transfers heat to the condensation section through heat absorption evaporation reflux. The temperature sensor 8 arranged at the heat absorption end determines whether the external coal body ambient temperature is at a normal level according to the pre-selected temperature warning index. If not, the safety valve 1 4-1 and the safety valve 2 4-2 are opened, and the liquid flow regulator 3 is opened at the same time. The pure liquid carbon dioxide stored in the liquid carbon dioxide storage chamber 1 flows into the liquid flow regulator 3 through the safety valve 1 4-1 for flow rate adjustment, and is then transported to the condensation shell 6 through the transport circulation pipeline 4 and the safety valve 2 4-2 to perform superconducting heat exchange with the outer wall of the condensation section of the heat pipe body 5.

[0061] Step three, start the liquid carbon dioxide pressurized refrigeration chamber 11: the pressure sensor 7 arranged in the condensing shell 6 determines the pressure range of the internal environment of the shell after the liquid carbon dioxide flows through the shell. The detection accuracy of the pressure sensor 7 is ±0.5Mpa. At the same time, it detects whether gaseous carbon dioxide is generated according to the change of the pressure value of the sensor. If gas is generated, the safety valve three 4-3 and the gas-liquid diverter 12 and the pressurized refrigerator 13 in the pressurized refrigeration chamber 11 are opened. The gaseous carbon dioxide that has completely absorbed heat and undergone phase change and the carbon dioxide that has not completely become liquid in the condensing shell 6 are transported to the pressurized refrigeration chamber 11 through the safety valve three 4-3 and the conveying circulation pipeline 4; after the gas-liquid separation through the gas-liquid diverter 12, the pure gaseous carbon dioxide flows into the pressurized refrigerator 13 for compression, condensation and liquefaction, the safety valve four 4-4 is opened, and the pure liquid CO2 is transported to the liquid carbon dioxide storage chamber 1 for storage.

[0062] Furthermore, the step 1 is implemented by the following specific steps:

[0063] The angle between the borehole and the wall and the reasonable spacing between the boreholes are clearly defined, and three equidistant inclined boreholes are arranged on the wall of the coal pillar to facilitate the installation of the superconducting heat pipe.

[0064] The installation angle of the superconducting heat pipe should be determined. The condensing section of the temperature-controlled superconducting heat transfer device should be kept vertical to the ground, and the heat absorption section should be at a certain angle to the ground. The superconducting heat pipes should be inserted at equal intervals. After the superconducting heat pipe is installed, the wall of the borehole should be sealed with sealing materials.

[0065] It is clear that the sealing material is polyurethane sealing material, which has the characteristics of good flexibility, fast reaction speed, good pressure resistance, high expansion rate, etc. It can reinforce the drilled holes on the wall of the coal pillar to prevent air leakage.

[0066] The connection sequence of the superconducting heat pipes is clarified. After the superconducting heat pipes are inserted into the drilled holes and the drilled holes are reinforced and sealed with plugging materials, the superconducting heat pipes are connected. The condensation shells at the condensation sections of the three superconducting heat pipes are connected using three transport circulation pipelines.

[0067] The connection sequence of the liquid CO2 temperature-controlled superconducting heat transfer device is clarified: the liquid carbon dioxide inlet 5-1 is connected to the liquid carbon dioxide storage chamber outlet 1-1 via a conveying circulation pipeline; the liquid carbon dioxide inlet 5-2 is connected to the pressurized refrigeration chamber air inlet 11-1 via a conveying circulation pipeline; the liquid carbon dioxide storage chamber liquid inlet 1-2 is connected to the pressurized refrigeration chamber outlet 11-2.

[0068] Furthermore, the step 2 is implemented by the following specific steps:

[0069] The critical temperature range of spontaneous combustion of coal pillar is clarified, and the temperature warning value range of temperature sensor 8 is preset to be 30℃-60℃.

[0070] Furthermore, the step three is implemented by the following specific steps:

[0071] The critical pressure value of liquid CO2 is clarified, and the pressure warning value in the preset pressure sensor 7 is 7.38MPa.

[0072] like Figure 6As shown: the superconducting heat pipe 5 is used to autonomously transfer heat from the high-temperature area inside the coal pillar. The device is composed of a circulating working medium 9, a heat pipe body 10 that transfers heat by evaporating, condensing and refluxing the working medium inside, and a condensation shell 6 filled with liquid carbon dioxide for superconducting heat transfer. The heat pipe body 10 includes a cylindrical heat-absorbing section, an insulating section and a condensation section that are sequentially connected from bottom to top. The lower section of the heat pipe body 10 is a heat-absorbing section, and the circulating working medium 9 is filled inside the heat-absorbing section to perform preliminary heat transfer. A temperature sensor 8 is arranged on the outer wall of the heat-absorbing end of the heat pipe body 10, and its detection accuracy is ±0.5°C, which can be used to detect whether the temperature of the external environment exceeds the critical temperature. The middle section of the heat pipe body 10 is an insulating section, and no working medium is filled inside the insulating section, so as to ensure that heat is transferred through the phase change evaporation flow of the working medium to ensure the thermal conductivity of the heat pipe, and the insulating section is bent to facilitate the installation and use of the device. The upper section of the heat pipe body 10 is a condensation section, and no working medium is filled inside the condensation section. A condensation shell 6 is installed on its outer wall to perform superconducting heat transfer. The heat pipe body 10 is made of stainless steel, and the outer wall of the pipe body is supplemented with an anti-corrosion coating; the circulating working medium 9 is an Al2O3 nanofluid with a filling rate of 30%, which can improve the boiling heat transfer effect of the superconducting heat pipe. The condensation shell 6 is a cylindrical shell designed with an insulated explosion-proof double-layer stainless steel. The inner and outer walls of the shell are covered with an anti-corrosion coating. The liquid carbon dioxide inlet 5-1 and the outlet 5-2 are respectively arranged on both sides of the shell, so that the liquid carbon dioxide enters and flows out of the condensation shell 6 for superconducting heat transfer. The pressure sensor 7 is arranged in the condensation shell 6 to monitor whether the carbon dioxide in the condensation shell is gaseous carbon dioxide.

[0073] like Figure 7 As shown: the pressurized refrigeration chamber 11 is used for diverting and pressurizing the gas-liquid mixed carbon dioxide, and the device is composed of a gas-liquid diverter 12 and a pressurized refrigerator 13; the gas-liquid diverter 12 is connected to the pressurized refrigerator 13, and the carbon dioxide after phase change and vaporization passes through the gas-liquid diverter 12 to obtain pure carbon dioxide gas, and then enters the pressurized refrigerator 13 to obtain liquid carbon dioxide.

[0074] like Fig. 9 As shown: the liquid CO2 storage chamber 1 for collecting and storing liquid carbon dioxide is made of double-layer stainless steel, and the inner and outer walls are covered with thermal insulation and anti-corrosion coatings. A liquid inlet 1-2 and a liquid outlet 1-1 are arranged on both sides, and a pressure relief valve 2 is arranged on the top; the liquid inlet 1-2 is connected to the pressurized refrigeration chamber 11 through a safety valve 4-4; the liquid outlet 1-1 is connected to the conveying circulation pipeline 4 and the liquid flow meter 3 and the condensation shell 6 through a safety valve 4-1; it ensures that pure liquid CO2 is conveyed to the liquid carbon dioxide storage chamber 1 for storage.

[0075] like Fig.10As shown: the conveying circulation pipeline 4 is connected to the condensing shell 6, the pressurized refrigeration chamber 11 and the liquid carbon dioxide storage chamber 1. The conveying circulation pipeline 4 is made of an insulating anti-corrosion pipe material, which can ensure the circulation of liquid carbon dioxide in the whole device.

Claims

1. A liquid carbon dioxide enhanced heat transfer type heat pipe device for mining, characterized in that: It comprises a liquid carbon dioxide storage chamber (1), a transport circulation pipeline (4), a superconducting heat pipe (5) and a pressurized refrigeration chamber (11); The superconducting heat pipe (5) is connected to the liquid CO2 storage chamber (1) and the pressurized refrigeration chamber (11) via a transport circulation pipeline (4); a heat pipe body (10) is arranged inside the superconducting heat pipe (5), and a circulating working medium (9) is inside the heat pipe body (10); The liquid carbon dioxide storage chamber (1) is connected to the condensation shell (6) of the superconducting heat pipe (5) through a safety valve 1 (4-1), a liquid flow regulator (3), and a safety valve 2 (4-2); The condensing shell (6) is connected to the pressurized refrigeration chamber (11) through the conveying circulation pipeline (4) and the third safety valve (4-3), and the output end of the pressurized refrigeration chamber (11) is connected to the liquid carbon dioxide storage chamber (1) through the gas-liquid splitter (12), the pressurized refrigerator (13), and the fourth safety valve (4-4).

2. A liquid carbon dioxide enhanced heat transfer type heat pipe device for mining according to claim 1, characterized in that: The liquid flow regulator (3) adjusts the liquid flow rate to between 30-100 ml / min, and delivers the liquid carbon dioxide flowing at a uniform speed to the condensation shell (6) of the superconducting heat pipe (5).

3. The liquid carbon dioxide enhanced heat transfer type heat pipe device for mining according to claim 1, characterized in that: The superconducting heat pipe (5) comprises a heat pipe body (10) which transfers heat by absorbing heat, evaporating, condensing and refluxing a working fluid inside the heat pipe body (10); the inside of the heat pipe body (10) is a circulating working fluid (9); the outside of the heat pipe body (10) is a condensation shell (6) filled with liquid carbon dioxide for superconducting heat transfer.

4. The liquid carbon dioxide enhanced heat transfer type heat pipe device for mining according to claim 3, characterized in that: The heat pipe body (10) comprises a cylindrical heat absorbing section, a heat insulating section and a condensing section which are sequentially connected from bottom to top; the lower section of the heat pipe body (10) is the heat absorbing section, and a temperature sensor (8) is arranged on the outer wall of the heat absorbing end of the heat pipe body (10); the middle section of the heat pipe body (10) is the heat insulating section, and no working fluid is filled inside the heat insulating section; the upper section of the heat pipe body (10) is the condensing section, and no working fluid is filled inside the condensing section, and a condensing shell (6) is installed on its outer wall to perform superconducting heat transfer work.

5. The liquid carbon dioxide enhanced heat transfer type heat pipe device for mining according to claim 1, characterized in that: The condensation shell (6) is a cylindrical shell designed with an insulated explosion-proof double-layer stainless steel. The inner and outer walls of the shell are covered with an anti-corrosion coating, and a liquid carbon dioxide inlet (5-1) and an outlet (5-2) are respectively arranged on both sides of the shell.

6. The liquid carbon dioxide enhanced heat transfer type heat pipe device for mining according to claim 1, characterized in that: The pressurized refrigeration chamber (11) comprises a gas-liquid splitter (12) for separating liquid carbon dioxide from carbon dioxide that has undergone phase change and vaporized, and a pressurized refrigerator (13) for converting carbon dioxide gas into liquid carbon dioxide through compression refrigeration; the gas-liquid splitter (12) is connected to the pressurized refrigerator (13).

7. The liquid carbon dioxide enhanced heat transfer type heat pipe device for mining according to claim 1, characterized in that: The liquid carbon dioxide storage chamber (1) is made of double-layer stainless steel, with inner and outer walls covered with heat-insulating anti-corrosion coatings, with liquid inlets (1-2) and liquid outlets (1-1) provided on both sides, and a pressure relief valve (2) provided on the top; The liquid inlet (1-2) is connected to the liquid outlet 2 (11-2) of the pressurized refrigeration chamber (11) through a safety valve 4 (4-4); the liquid outlet 1 (1-1) is connected to the conveying circulation pipeline (4) and the condensation shell (6) through a safety valve 1 (4-1).

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