A high-temperature heat pipe operation device and method for waste recovery

Abstract

The present invention belongs to the technical field of phase change heat transfer, and discloses a high-temperature heat pipe operation device and method for waste heat recovery. The high-temperature heat pipe operation device includes an evaporation section system and a condensation section system; the evaporation section system includes a cylindrical barrel, and a plurality of first mounting holes and second mounting holes for mounting electric heating rods and high-temperature heat pipes are arrayed in the cylindrical barrel; the condensation section system includes an air duct body and an air duct top cover, and a plurality of first through holes and second through holes are respectively provided on the bottom of the air duct body and the air duct top cover; the gas outlet end of the air duct body is connected to the gas supply pipeline, the exhaust branch and the ejector in sequence; one end of the ejector is connected to a room temperature compressed gas source, and the other end is connected to a coil; the gas outlet end of the coil is connected to the gas inlet end of the air duct body to form a circulating gas path. The high-temperature heat pipe operation device of the present invention can realize the simultaneous operation of multiple high-temperature heat pipes, and realize waste heat recovery, and the experimental cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of phase change heat transfer, and in particular to a high-temperature heat pipe operating device and method for waste recovery. Background Art

[0002] A heat pipe is a passive heat transfer element with extremely high heat transfer efficiency. It achieves heat transfer by relying on the flow of working fluid and phase change in the pipe under the action of gravity, capillary force, etc. A high-temperature heat pipe refers to a heat pipe whose working medium is alkali metal and whose working temperature is above 500°C. High-temperature heat pipes are widely used in aerospace, nuclear engineering, petrochemical and other fields due to their excellent and stable heat transfer performance. Since high-temperature heat pipes have high working temperatures and harsh working environments, experimental research on the operating stability, material compatibility and life of high-temperature heat pipes is extremely important.

[0003] Long-term experimental operation of high-temperature heat pipes is an important means to test the stability of heat pipes, study the corrosion mechanism of heat pipes, and predict the life of heat pipes. The long-term operation device and method of high-temperature heat pipes with efficient waste recovery can realize the long-term operation experiment of heat pipes. At present, the experimental device of high-temperature heat pipes, for example, a heat pipe performance detection device proposed in the prior art CN202420244219.5, can be used to test the heat transfer performance of heat pipes, but the heat pipe performance detection device of the prior art is only for a single heat pipe, and it is impossible to test multiple heat pipes at the same time. Moreover, although a heat transfer performance test device proposed in the prior art CN202310471777.5 can be used for a heat transfer performance test device based on different horizontal inclination angles of high-temperature heat pipes with a large aspect ratio, the device can only perform a short-term heat transfer performance test on a single heat pipe, and cannot detect the working performance of high-temperature heat pipes under long-term operation with an operating time of more than 5000h. Based on the above, it can be seen that most of the experimental devices in the prior art can only perform short-term heat transfer performance tests on a single high-temperature heat pipe, and it is difficult to meet the demand of long-term operation of multiple high-temperature heat pipes for more than 5000 hours at the same time. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a high-temperature heat pipe operation device and method for waste recovery.

[0005] The high-temperature heat pipe operation device and method for waste recovery of the present invention are realized by the following technical solutions:

[0006] The present invention takes into account that during the high-temperature heat pipe experiment, it is necessary to provide a heat source and a cold source to simulate the working conditions of the heat pipe when it is actually used, especially in the long-term operation experiment of the high-temperature heat pipe of more than 5000 hours, the heat source and the cold source need to consume a lot of energy. The room temperature cooling medium used to transfer heat needs to be heated to a certain temperature before it can be used for heat pipe cooling, otherwise the heat pipe will not be able to start. The cooling medium flowing through the heat pipe contains extremely high heat due to being heated by the heat pipe, and the heat carried by the cooling medium flowing through the condensation section of the heat pipe is ignored in the long-term operation device of the high-temperature heat pipe in the prior art. Based on this, a high-temperature heat pipe operation device with waste recovery of the present invention recycles and reuses the heat of this part of the medium, thereby greatly reducing the cost of high-temperature heat pipe operation and saving energy. And a high-temperature heat pipe operation device with waste recovery of the present invention includes an evaporation section system and a condensation section system.

[0007] It should be noted that, in the present invention, the evaporation section system comprises a cylindrical barrel, and a plurality of first mounting holes and a plurality of second mounting holes are alternately distributed on the bottom of the cylindrical barrel. Among them, the plurality of first mounting holes are distributed in an array, and the plurality of first mounting holes are all used to install electric heating rods, so that the installed plurality of electric heating rods form an electric heating rod array.

[0008] In the present invention, several of the second mounting holes are used to install the evaporation sections of multiple high-temperature heat pipes to be tested, so that the multiple high-temperature heat pipes to be tested after installation can form a high-temperature heat pipe array, and the high-temperature heat pipe array and the electric heating rod array are evenly alternately arranged, so that several of the electric heating rods can achieve uniform heating of the multiple high-temperature heat pipes to be tested at the same time.

[0009] In the present invention, there is a gap between the outer walls of the installed several electric heating rods, the outer walls of the multiple high-temperature heat pipes to be tested and the inner wall of the cylindrical barrel, and the gap is used to fill the heat transfer medium so that the several electric heating rods can uniformly heat the multiple high-temperature heat pipes to be tested at the same time through the heat transfer medium.

[0010] In the present invention, the condensation section system includes an air duct body and an air duct top cover, and the air duct top cover is detachably arranged on the upper end of the air duct body to facilitate the installation, replacement and maintenance of the electric heating rod.

[0011] In the present invention, a plurality of first through holes are provided at the bottom of the air duct body, and the positions of the plurality of first through holes correspond one-to-one to the positions of the plurality of second mounting holes. The plurality of first through holes are used for allowing the condensing sections of a plurality of high-temperature heat pipes to be tested to pass through, so as to facilitate the installation, replacement and maintenance of the high-temperature heat pipes to be tested.

[0012] In the present invention, a plurality of second through holes are provided on the top cover of the air duct, and the positions of the plurality of second through holes correspond one-to-one to the positions of the plurality of first through holes; each of the second through holes is used for the corresponding thermocouple to pass through, so that each of the thermocouples is attached to the outer wall surface of the corresponding high-temperature heat pipe to be tested, so as to facilitate the installation, replacement and maintenance of the high-temperature heat pipe to be tested and the thermocouple. In addition, by setting the positions of the plurality of second through holes corresponding one-to-one to the positions of the plurality of first through holes, the gap between each thermocouple and the top cover of the air duct can be made smaller, thereby effectively avoiding contact between the air duct body and the outside air, thereby improving the experimental efficiency.

[0013] In the present invention, the gas outlet end of the air duct body is connected to a gas supply pipeline, and the gas outlet end of the gas supply pipeline is respectively connected to an exhaust branch and an ejector. The exhaust branch is used for exhausting gas so as to adjust the gas flow in the gas supply pipeline.

[0014] In the present invention, one end of the ejector is connected to a room temperature compressed air source, and the other end is connected to a coil; and the gas outlet end of the coil is connected to the gas inlet end of the air duct body to form a circulating gas path. The room temperature compressed air provided by the room temperature compressed air source is introduced into the coil through the ejector, and then enters the air duct body through the coil, and performs heat exchange with the condensing section of the high temperature heat pipe to be tested in the air duct body with an operating temperature of more than 700°C, thereby forming a low pressure gas above 600°C, which is output from the gas outlet of the air duct body and enters the air supply pipeline, and is transported to the ejector through the air supply pipeline. At this time, the low pressure gas above 600°C formed merges with the room temperature compressed air provided by the room temperature compressed air source to form a gas of 395°C to 405°C, and enters the coil from the gas outlet of the ejector, finally achieving the flow and heat balance of the system.

[0015] In some preferred embodiments of the present invention, the inner diameter of the air duct body gradually decreases from the middle portion to both ends to ensure that the incoming gas can evenly flow through the wall surface of the condensation section of each high-temperature heat pipe to be tested.

[0016] It should also be emphasized that the present invention does not limit the specific number of the first mounting holes and the specific number of the second mounting holes, as long as the electric heating rod array formed by the electric heating rods installed in the first mounting holes can surround the high-temperature heat pipe array installed in the second mounting holes. For example, in some preferred embodiments of the present invention, the present invention is provided with 23 electric heating rods in 23 first mounting holes, and 14 high-temperature heat pipes to be tested are arranged in 14 second mounting holes, so that the electric heating rod array composed of 23 electric heating rods will surround the high-temperature heat pipe array composed of 14 high-temperature heat pipes to be tested, so that the electric heating rod array can fully and evenly heat the high-temperature heat pipe array to the greatest extent, so as to ensure that each heat pipe is heated evenly.

[0017] In some preferred embodiments of the present invention, the heating power of each of the electric heating rods can reach 1.5 kW, so that the high-temperature heat pipe can operate stably under this heating power.

[0018] In some preferred embodiments of the present invention, the evaporation section system further includes a cylinder cover, which is installed on the top of the cylindrical cylinder through a flange, so that the evaporation section system forms a relatively closed heating space, so as to improve the heating effect of each high-temperature heat pipe to be tested and reduce heat loss; at the same time, it is also convenient for the installation, replacement and maintenance of the electric heating rod. Among them, the cylinder cover is provided with a plurality of third through holes, and the plurality of the third through holes correspond to the positions of the plurality of the electric heating rods one by one, and the plurality of the third through holes are used for the evaporation sections of the plurality of high-temperature heat pipes to be tested to pass through.

[0019] In some preferred embodiments of the present invention, the gas inlet end and the gas outlet end of the air duct body are both provided with temperature sensor interfaces, and each of the temperature sensor interfaces is used to connect a corresponding temperature sensor, so as to facilitate real-time monitoring of the temperature of the gas inlet end and the gas outlet end of the air duct body.

[0020] In some preferred embodiments of the present invention, a pressure sensor interface is provided on the gas supply pipeline, and the pressure sensor interface is used to connect a pressure sensor to achieve the purpose of monitoring pressure.

[0021] In some preferred embodiments of the present invention, a flow sensor interface is further provided at the gas outlet end of the coil, and the flow sensor interface is used to connect a flow sensor to monitor the gas flow entering the air duct body.

[0022] In some preferred embodiments of the present invention, the gas outlet end of the exhaust branch is connected to a waste gas tank to facilitate the recovery of the exhausted waste gas.

[0023] In some preferred embodiments of the present invention, the condensation section system also includes a compressor, a gas storage tank and a cold dryer connected in sequence, and the gas outlet of the cold dryer is connected to the ejector to provide a room temperature compressed gas source to the ejector.

[0024] In some preferred embodiments of the present invention, the heat transfer medium is magnesium oxide powder, which has low cost and strong thermal conductivity.

[0025] In some preferred embodiments of the present invention, the high-temperature heat pipe operation device for waste recovery further comprises a first bracket, and the first bracket is used to install or place a cylindrical barrel.

[0026] In some preferred embodiments of the present invention, the high-temperature heat pipe operation device for waste recovery further includes a second bracket, and the second bracket supports the gas supply pipeline.

[0027] In some preferred embodiments of the present invention, a safety valve interface is further provided between the air duct body and the air supply pipeline, and the safety valve interface is used for installing or connecting a safety valve.

[0028] The present invention also provides a high-temperature heat pipe operation method based on the above-mentioned high-temperature heat pipe operation device for waste recovery, comprising the following steps:

[0029] Step 1, installation of electric heating rod:

[0030] A plurality of electric heating rods are vertically installed in corresponding first installation holes to form an electric heating rod array.

[0031] Step 2, installation of the high temperature heat pipe to be tested:

[0032] A plurality of high-temperature heat pipes to be tested are vertically passed through the corresponding first through holes, until the evaporation section of each of the high-temperature heat pipes to be tested is respectively installed in the corresponding second installation hole, and the condensation section of each of the high-temperature heat pipes to be tested is located in the air duct body.

[0033] Step 3: Installation and connection of thermocouple.

[0034] A thermocouple is respectively connected to the outer wall surface of each high-temperature heat pipe to be tested, and each of the thermocouples is respectively passed through the corresponding first through hole on the air duct top cover. Subsequently, the air duct top cover is installed on the upper end of the air duct body; and each of the thermocouples is signal-connected to the data acquisition device.

[0035] Step 4, thermal insulation treatment:

[0036] The evaporation section system and the condensation section system are both wrapped with thermal insulation cotton to be thermally insulated from the external environment.

[0037] Step 5, start the experiment:

[0038] Turn on the electric heating rod, and when the temperature of the outer wall of the evaporation section of the high-temperature heat pipe to be tested is ≥500°C, introduce room temperature compressed gas into the ejector; by adjusting the air intake of the room temperature compressed gas and the exhaust flow of the exhaust branch, the gas flow in the gas supply pipeline is stabilized at the target flow value, and the temperature of the gas inlet end of the air duct body is stabilized at the target temperature, that is, a long-term simulation operation experiment of multiple high-temperature heat pipes to be tested is realized. Among them, in some preferred embodiments of the present invention, the target flow value is 271Nm 3 / h~272Nm 3 In some preferred embodiments of the present invention, the target temperature is 395°C-405°C.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The high-temperature heat pipe operation device of the present invention includes an evaporation section system and a condensation section system. The evaporation section system of the present invention includes a cylindrical barrel, and a plurality of first mounting holes and a plurality of second mounting holes are alternately distributed on the bottom of the cylindrical barrel, and a plurality of the first mounting holes are distributed in an array for installing electric heating rods, so that the installed plurality of electric heating rods form an electric heating rod array, and a plurality of the second mounting holes are used to install the evaporation section of a plurality of high-temperature heat pipes to be tested, so that the installed plurality of high-temperature heat pipes to be tested can form a high-temperature heat pipe array, and the high-temperature heat pipe array and the electric heating rod array are evenly alternately arranged, so that a plurality of the electric heating rods can achieve uniform heating of a plurality of high-temperature heat pipes to be tested at the same time. The evaporation section system of the present invention includes an air duct body and an air duct top cover, and the air duct top cover is detachably arranged at the upper end of the air duct body to facilitate the installation, replacement and maintenance of the electric heating rods. Moreover, the bottom of the air duct body of the present invention is provided with a plurality of first through holes corresponding to the positions of the plurality of second mounting holes, and the plurality of first through holes are used for the condensation sections of a plurality of high-temperature heat pipes to be tested to pass through, so as to facilitate the installation, replacement and maintenance of the high-temperature heat pipes to be tested. The top cover of the air duct of the present invention is provided with a plurality of second through holes corresponding to the positions of the plurality of first through holes, and the plurality of second through holes are used for the corresponding thermocouples to pass through, so that each thermocouple is attached to the outer wall surface of the corresponding high-temperature heat pipe to be tested, so as to facilitate the installation, replacement and maintenance of the high-temperature heat pipes and thermocouples to be tested. The gas outlet end of the air duct body of the present invention is connected to a gas supply pipeline, and the gas outlet ends of the gas supply pipeline are respectively connected to an exhaust branch and an ejector. Among them, the exhaust branch is used for exhausting gas, so as to facilitate the adjustment of the gas flow in the gas supply pipeline. One end of the ejector of the present invention is connected to a room temperature compressed air source, and the other end is connected to a coil; and the gas outlet end of the coil is connected to the gas inlet end of the air duct body. The room temperature compressed air provided by the room temperature compressed air source is introduced into the coil through the ejector, and then enters the air duct body through the coil, and performs heat exchange with the condensing section of the high-temperature heat pipe to be tested in the air duct body with an operating temperature of more than 700°C, thereby forming a low-pressure gas above 600°C, which is output from the gas outlet of the air duct body and enters the air supply pipeline, and is transported to the ejector through the air supply pipeline. At this time, the formed low-pressure gas above 600°C merges with the room temperature compressed air provided by the room temperature compressed air source to form a gas of 395°C~405°C, and enters the coil from the gas outlet of the ejector, thereby achieving flow and heat balance of the system, thereby achieving efficient waste recovery.

[0041] The high-temperature heat pipe operation device of the present invention can realize long-term operation of multiple high-temperature heat pipes for more than 5000 hours at the same time. In addition, the present invention couples the ejector to the gas path, uses room temperature high-pressure air to eject low-pressure air above 600°C, and ingeniously realizes the recovery and reuse of gas energy during the high-temperature heat pipe experiment, which is of great significance for reducing experimental costs and saving energy.

[0042] The high-temperature heat pipe operation device of the present invention provides equipment support for the study of the working state, corrosion mechanism, service life and material compatibility of the high-temperature heat pipe after long-term operation of more than 5000 hours.

[0043] The high-temperature heat pipe long-cycle operation method based on the waste gas recovery of the high-temperature heat pipe operation device of the present invention can realize a long-term simulated operation experiment of more than 5000 hours for multiple high-temperature heat pipes at the same time, which provides a new idea and method for heat pipe experiments and is of great significance for studying the heat transfer performance, service life and material compatibility of high-temperature heat pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of the high-temperature heat pipe operating device of the present invention.

[0045] Figure 2 It is a schematic structural diagram of the first mounting hole and the second mounting hole in the cylindrical barrel of the present invention.

[0046] Figure 3 This is a schematic diagram of the structure of the cylindrical barrel of the present invention after installing a high-temperature heat pipe and an electric heating rod.

[0047] Figure 4 It is a structural schematic diagram of the condensation section system of the air duct body of the present invention.

[0048] Figure 5 It is a schematic diagram of the bottom structure of the air duct body of the present invention.

[0049] Figure 6 It is a schematic structural diagram of the cylinder cover of the present invention.

[0050] Figure 7 It is a schematic structural diagram of the ejector of the present invention. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present invention will be described clearly and completely below.

[0052] Example 1

[0053] See also Figure 1 to Figure 7 , this embodiment provides a high-temperature heat pipe operating device for waste recovery.

[0054] A high-temperature heat pipe operating device for waste recovery in this embodiment includes an evaporation section system, a condensation section system and a plurality of thermocouples.

[0055] like Figure 2 As shown, the evaporation section system of this embodiment includes a cylindrical barrel 1, and the cylindrical barrel 1 has an opening, in which a plurality of first mounting holes 101 and a plurality of second mounting holes 102 are alternately distributed. Among them, a plurality of the first mounting holes 101 are distributed in an array, and an electric heating rod 2 is installed in a plurality of the first mounting holes 101, so that the installed plurality of electric heating rods 2 form an electric heating rod array; the arrangement of a plurality of the first mounting holes 101 can also facilitate the installation, replacement and maintenance of the electric heating rod 2. A plurality of the second mounting holes 102 are used to install the evaporation section of a plurality of high-temperature heat pipes 3 to be tested, so that the installed plurality of high-temperature heat pipes 3 to be tested can form a high-temperature heat pipe array, and the high-temperature heat pipe array and the electric heating rod array are evenly alternately arranged, so that a plurality of the electric heating rods 2 can achieve uniform heating of the plurality of high-temperature heat pipes 3 to be tested at the same time. And the structural schematic diagram of installing a plurality of electric heating rods 2 and a plurality of high-temperature heat pipes 3 to be tested is shown as follows. Figure 3 shown.

[0056] like Figure 1 and Figure 3 As shown, in this embodiment, there is a gap between the outer walls of the installed several electric heating rods 2, the outer walls of the multiple high-temperature heat pipes to be tested and the inner wall of the cylindrical barrel 1, and the gap is used to fill the heat transfer medium so that the several electric heating rods 2 can uniformly heat the multiple high-temperature heat pipes 3 to be tested at the same time through the heat transfer medium.

[0057] See also Figure 4 In this embodiment, the condensation section system includes an air duct body 4 and an air duct top cover 5. The upper end of the air duct body 4 has an open setting. The air duct top cover 5 is set at the open end of the air duct body 4 through a flange. The flange is fixed to the open end of the air duct body 4 through bolts to achieve the detachable setting of the air duct top cover 5 at the open end of the air duct body 4.

[0058] See also Figure 5 In this embodiment, a plurality of first through holes 401 are provided at the bottom of the air duct body 4, and the positions of the plurality of first through holes 401 correspond one-to-one to the positions of the plurality of second mounting holes 102. The plurality of first through holes 401 are used for allowing the condensing sections of a plurality of high-temperature heat pipes 3 to be tested to pass through, so as to facilitate the installation, replacement and maintenance of the high-temperature heat pipes 3 to be tested.

[0059] See also Figure 1 and Figure 4In this embodiment, a plurality of second through holes 501 are provided on the air duct top cover 5, and the positions of the plurality of second through holes 501 correspond one-to-one to the positions of the plurality of first through holes 401; each of the second through holes 501 is used for allowing the corresponding thermocouple to pass through, so that each of the thermocouples is attached to the outer wall surface of the corresponding high-temperature heat pipe 3 to be tested, so as to facilitate the installation, replacement and maintenance of the high-temperature heat pipe 3 to be tested and the thermocouple.

[0060] See also Figure 1 In this embodiment, the gas outlet end of the air duct body 4 is connected to the gas supply pipeline 6, and the gas outlet end of the gas supply pipeline 6 is respectively connected to the exhaust branch 7 and the ejector 8. Among them, one end of the ejector 8 is connected to the cold dryer 13, the gas storage tank 12 and the compressor 11 in sequence to provide a room temperature compressed gas source to the ejector 8. And the gas outlet of the ejector 8 is connected to the coil 9, and the gas outlet end of the coil 9 is connected to the gas inlet end of the air duct body 4 to form a circulating gas path. The gas outlet end of the exhaust branch 7 is connected to the waste gas tank 10 to facilitate the recovery of the discharged waste gas.

[0061] See also Figure 4 and Figure 5 In a preferred embodiment of the present invention, the inner diameter of the air duct body 4 gradually decreases from the middle to both ends to ensure that the incoming gas can evenly flow through the wall surface of the condensation section of each high-temperature heat pipe 3 to be tested.

[0062] See also Figure 6 In a preferred embodiment of the present invention, the evaporation section system further includes a barrel cover 103, which is installed on the top of the cylindrical barrel 1 through a flange, so that the evaporation section system forms a relatively closed heating space, so as to improve the heating effect of each high-temperature heat pipe 3 to be tested and reduce heat loss; at the same time, it is also convenient for the installation, replacement and maintenance of the electric heating rod 2. Among them, the barrel cover 103 is provided with a plurality of third through holes 104, and the plurality of third through holes 104 correspond to the positions of the plurality of electric heating rods 2 one by one, and the plurality of third through holes 104 are used for the evaporation sections of the plurality of high-temperature heat pipes 3 to be tested to pass through.

[0063] See also Figure 7 In a preferred embodiment of the present invention, the ejector 8 has three connection ports, namely a low-pressure air suction port 801, a room temperature compressed air inlet port 802, and a mixed gas outlet port 803, wherein the low-pressure air suction port 801 is used to input low-pressure gas above 600°C, the room temperature compressed air inlet port 802 is used to input room temperature compressed air, and the low-pressure air suction port 801 is connected to the gas outlet port of the air supply pipeline 6, the room temperature compressed air inlet port 802 is connected to the gas outlet of the cold dryer 13, and the mixed gas outlet port 803 is connected to the gas inlet port of the coil 9.

[0064] See also Figure 4 In a preferred embodiment of the present invention, the gas inlet end and the gas outlet end of the air duct body 4 are both provided with a temperature sensor interface 402, and each of the temperature sensor interfaces 402 is used to connect a corresponding temperature sensor, so as to facilitate real-time monitoring of the temperature of the gas inlet end and the gas outlet end of the air duct body 4.

[0065] See also Figure 1 In a preferred embodiment of the present invention, a pressure sensor interface 601 is provided on the gas supply pipeline 6, and the pressure sensor interface 601 is used to connect a pressure sensor to monitor pressure changes.

[0066] See also Figure 1 In a preferred embodiment of the present invention, a flow sensor interface 901 is further provided at the gas outlet end of the coil 9, and the flow sensor interface 901 is used to connect a flow sensor to monitor the gas flow entering the air duct body 4.

[0067] See also Figure 1 In a preferred embodiment of the present invention, the high-temperature heat pipe operation device for waste recovery further includes a first bracket 14, which is disposed at the bottom of the cylindrical body 1 and is used to place the cylindrical body 1.

[0068] See also Figure 1 In a preferred embodiment of the present invention, the high-temperature heat pipe operation device for waste recovery further includes a second bracket 15 , which is disposed at the bottom of the gas supply pipeline 6 to support the gas supply pipeline 6 .

[0069] See also Figure 1 In some preferred embodiments of the present invention, a safety valve interface 16 is further provided between the air duct body 4 and the air supply pipeline 6, and the safety valve interface 16 is used to install or connect the safety valve.

[0070] Example 2

[0071] This embodiment provides a high-temperature heat pipe operation method with waste recovery.

[0072] The dimensions of the high-temperature heat pipe 3 to be tested used in this embodiment are: φ25mm×1500mm, the material is 316H stainless steel, the liquid wick is in the form of a wire mesh, and the working medium is metal Na.

[0073] This embodiment is based on the high-temperature heat pipe operating device in the above preferred embodiment, and specifically includes the following steps:

[0074] Step 1, installation of electric heating rod:

[0075] 1.1) According to the high temperature heat pipe operation device in a preferred embodiment above, that is, Figure 1 The test bench is constructed according to the structural schematic diagram shown, that is, the evaporation section cylindrical barrel 1 is placed on the support, and the two are used to align the holes through the electric heating rod.

[0076] 1.2) 23 electric heating rods 2 are installed in the first installation hole 101 at the bottom of the cylindrical barrel 1 to form an electric heating rod array. The electric heating rod 2 used in this embodiment has a size of φ5mm×500mm, and the heating power of a single rod is adjustable, with a maximum of 1.5kw.

[0077] 1.3) Arrange the air duct body 4, coil 9, air supply pipeline 6 and ejector 8 according to Figure 1 The relative positions shown are connected together by flanges, and the air duct body 4 is placed directly above the cylindrical barrel 1. The two are used to keep the high-temperature heat pipe array directly facing each other through the holes opened, and the air duct body 4 structure used in this embodiment is as follows Figure 4 shown.

[0078] 1.4) If Figure 3 As shown, the ejector 8 used in this embodiment has three connection ports, namely, a low-pressure air intake port 801, a room-temperature compressed air inlet port 802, and a mixed gas outlet port 803. The low-pressure air intake port 801 is connected to the gas outlet port of the air supply pipeline 6, the room-temperature compressed air inlet port 802 is connected to the gas outlet of the cold dryer 13, and the mixed gas outlet port 803 is connected to the gas inlet port of the coil 9 to form a circulating gas circuit. Among them, the room temperature compressed air provided by the room temperature compressed air source is introduced into the coil 9 through the ejector 8, and then enters the air duct body 4 through the coil 9, and performs heat exchange with the condensing section of the high-temperature heat pipe 3 to be tested in the air duct body 4 with an operating temperature of more than 700°C, thereby forming a low-pressure gas above 600°C, which is output from the gas outlet of the air duct body 4 and enters the air supply pipeline 6, and is transported to the ejector 8 through the air supply pipeline 6. At this time, the formed low-pressure gas above 600°C merges with the room temperature compressed air provided by the room temperature compressed air source to form a gas of 395°C~405°C, and enters the coil 9 from the gas outlet of the ejector 8, finally achieving the flow and heat balance of the system.

[0079] Step 2, installation of the high temperature heat pipe to be tested:

[0080] 2.1) Vertically pass the 14 high-temperature heat pipes 3 to be tested through the corresponding first through holes 401 until the evaporation section of each of the high-temperature heat pipes 3 to be tested is installed in the corresponding second installation hole 102, and the condensation section of each of the high-temperature heat pipes 3 to be tested is located in the air duct body 4. At this time, the high-temperature heat pipe array formed by the 14 high-temperature heat pipes 3 to be tested is surrounded by the electric heating rod array composed of 23 electric heating rods 2, so that the electric heating rod array can fully and evenly heat the high-temperature heat pipe array to the greatest extent, so as to ensure that each heat pipe is heated evenly.

[0081] 2.2) Temperature sensors are installed on the temperature sensor interfaces 402 at the gas inlet and gas outlet ends of the air duct body 4 to facilitate real-time monitoring of the temperatures of the gas inlet and gas outlet ends of the air duct body 4 .

[0082] 2.3) Install a pressure sensor at the pressure sensor interface 601 on the gas supply pipeline 6.

[0083] 2.4) A flow sensor is installed at the flow sensor interface 901 at the gas outlet end of the coil 9 to monitor the gas flow entering the air duct body 4 .

[0084] Step 3, installation and connection of thermocouple:

[0085] A thermocouple is respectively connected to the outer wall surface of each of the high-temperature heat pipes 3 to be tested, and each of the thermocouples is respectively passed through the corresponding first through hole 401 on the air duct top cover 5. Subsequently, the air duct top cover 5 is installed on the upper end of the air duct body 4; and each of the thermocouples is signal-connected to the data acquisition device.

[0086] Step 4, thermal insulation treatment:

[0087] 4.1) The evaporation section system and the condensation section system are both wrapped with thermal insulation cotton to insulate from the external environment.

[0088] 4.2) Check the air tightness of the gas line. The specific operation method is: open the compressor 11 to let air into the pipeline, close the branch exhaust valve of the air supply pipeline 6, observe the pressure sensor reading, and when the pressure in the pipeline rises to 1Mpa, turn off the compressor 11 to stop the air intake. If the pipeline pressure drops by no more than 1% after 30 minutes, it is considered that the pipeline is well sealed, and the experiment in step 5 can be carried out.

[0089] Step 5, start the experiment:

[0090] 5.1) Turn on the electric heating rod 2, set the total heating power to 21kw, observe the data acquisition device, and when the temperature of the outer wall of the evaporation section of the high-temperature heat pipe 3 to be tested rises to ≥500℃, introduce room temperature compressed gas into the ejector 8. The initial air intake of the compressor 11 is set to 10Nm3 / h, increase 5Nm every 5min 3 / h, and finally increase the flow rate of compressor 11 to 90Nm 3 / h.

[0091] 5.2) Observe the reading of the flow sensor and adjust the intake volume of the room temperature compressed gas and the exhaust flow of the exhaust branch 7 to stabilize the gas flow in the gas supply pipeline 6 at 271 Nm 3 / h~272Nm 3 / h, and when the temperature of the gas inlet end of the air duct body 4 is stabilized at 395℃~405℃, the cooling power is about 21kw, the system has achieved thermal balance, and the high-temperature heat pipe can be stably operated at an operating temperature above 700℃ and the operating time can be as long as 5000h for a long time.

[0092] Obviously, the above embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A high-temperature heat pipe operation device for waste recovery, characterized in that: Including evaporation section system and condensation section system; The evaporation section system comprises a cylindrical barrel (1), wherein a plurality of first mounting holes (101) and a plurality of second mounting holes (102) are alternately distributed on the bottom of the cylindrical barrel (1); wherein a plurality of the first mounting holes (101) are used to mount electric heating rods (2), and a plurality of the second mounting holes (102) are used to mount evaporation sections of a plurality of high-temperature heat pipes (3) to be tested, so that the plurality of high-temperature heat pipes (3) to be tested are heated by the plurality of the electric heating rods (2); and a gap is provided between the outer walls of the plurality of the installed electric heating rods (2), the outer walls of the plurality of high-temperature heat pipes (3) to be tested, and the inner wall of the cylindrical barrel (1), and the gap is used to fill a heat transfer medium; The condensation section system comprises an air duct body (4) and an air duct top cover (5), wherein the air duct top cover (5) is detachably arranged at the upper end of the air duct body (4); A plurality of first through holes (401) are provided at the bottom of the air duct body (4), and the positions of the plurality of first through holes (401) and the plurality of second mounting holes (102) correspond one to one, so as to be used for mounting the condensing sections of a plurality of high-temperature heat pipes (3) to be tested; The air duct top cover (5) is provided with a plurality of second through holes (501), and the positions of the plurality of second through holes (501) correspond one-to-one to the positions of the plurality of first through holes (401); each of the second through holes (501) is used for allowing a corresponding thermocouple to pass through, so that each of the thermocouples is attached to the outer wall surface of the corresponding high-temperature heat pipe (3) to be tested; The gas outlet end of the air duct body (4) is connected to a gas supply pipeline (6), and the gas outlet end of the gas supply pipeline (6) is respectively connected to an exhaust branch (7) and an ejector (8); wherein the exhaust branch (7) is used for exhausting gas; One end of the ejector (8) is connected to a room temperature compressed air source, and the other end is connected to a coil (9); and the gas outlet end of the coil (9) is in communication with the gas inlet end of the air duct body (4) to form a circulating gas path.

2. The high-temperature heat pipe operation device for waste recovery according to claim 1, characterized in that: The inner diameter of the air duct body (4) gradually decreases from the middle portion to both ends.

3. The high-temperature heat pipe operation device for waste recovery according to claim 1, characterized in that: The evaporation section system further comprises a cylinder cover (103), wherein the cylinder cover (103) is mounted on the top of the cylindrical cylinder (1) via a flange; The barrel cover (103) is provided with a plurality of third through holes (104), the positions of the plurality of third through holes (104) corresponding one-to-one to the positions of the plurality of second mounting holes (102), and the plurality of third through holes (104) are used for allowing the evaporation sections of a plurality of high-temperature heat pipes (3) to be tested to pass through.

4. The high-temperature heat pipe operation device for waste recovery according to claim 1, characterized in that: The gas inlet end and the gas outlet end of the air duct body (4) are both provided with temperature sensor interfaces (402), and the two temperature sensor interfaces (402) are respectively used to connect corresponding temperature sensors.

5. The high-temperature heat pipe operation device for waste recovery according to claim 1, characterized in that: The gas supply pipeline (6) is provided with a pressure sensor interface (601), and the pressure sensor interface (601) is used to connect a pressure sensor.

6. The high-temperature heat pipe operation device for waste recovery according to claim 1, characterized in that: The gas outlet end of the coil (9) is also provided with a flow sensor interface (901), and the flow sensor interface (901) is used to connect a flow sensor.

7. The high-temperature heat pipe operation device for waste recovery according to claim 1, characterized in that: The gas outlet end of the exhaust branch (7) is connected to an exhaust gas tank (10).

8. The high-temperature heat pipe operation device for waste recovery according to claim 1, characterized in that: The condensation section system further comprises a compressor (11), a gas storage tank (12) and a cold dryer (13) which are connected in sequence, and a gas outlet of the cold dryer (13) is connected to the ejector (8) to provide a room temperature compressed gas source to the ejector (8).

9. The high-temperature heat pipe operation device for waste recovery according to claim 1, characterized in that: The heat transfer medium is magnesium oxide powder.

10. A high-temperature heat pipe operation method based on the high-temperature heat pipe operation device with waste recovery according to any one of claims 1 to 9, characterized in that: The following steps are involved: Vertically installing a plurality of electric heating rods (2) in corresponding first installation holes (101) to form an electric heating rod array; Passing a plurality of high-temperature heat pipes (3) to be tested vertically through corresponding first through holes (401), until the evaporation section of each of the high-temperature heat pipes (3) to be tested is respectively installed in the corresponding second installation hole (102), and the condensation section of each of the high-temperature heat pipes (3) to be tested is located in the air duct body (4); A thermocouple is connected to the outer wall of each high-temperature heat pipe (3) to be tested, and each thermocouple is passed through the first corresponding through hole (401) on the air duct top cover (5). Subsequently, the air duct top cover (5) is installed on the upper end of the air duct body (4); and each thermocouple is connected to the data acquisition device; The evaporation section system and the condensation section system are both wrapped with thermal insulation cotton to insulate from the external environment; Turning on the electric heating rod (2), and when the temperature of the outer wall surface of the evaporation section of the high-temperature heat pipe (3) to be tested is ≥500° C., introducing room temperature compressed gas into the ejector (8); By adjusting the intake volume of room temperature compressed gas and the exhaust flow rate of the exhaust branch (7), the gas flow rate in the gas supply pipeline (6) is stabilized at a target flow rate value, and the temperature of the gas inlet end of the air duct body (4) is stabilized at a target temperature, thereby achieving a long-term simulated operation experiment of multiple high-temperature heat pipes (3) to be tested simultaneously.

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