CN114700355B - Device and method for destroying liquid metal high-temperature pulsating heat pipe - Google Patents
Device and method for destroying liquid metal high-temperature pulsating heat pipe Download PDFInfo
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- CN114700355B CN114700355B CN202210219228.4A CN202210219228A CN114700355B CN 114700355 B CN114700355 B CN 114700355B CN 202210219228 A CN202210219228 A CN 202210219228A CN 114700355 B CN114700355 B CN 114700355B
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- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 150
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 65
- 239000007788 liquid Substances 0.000 claims abstract description 41
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 40
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 40
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 20
- 239000011261 inert gas Substances 0.000 claims abstract description 17
- 230000006378 damage Effects 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 11
- 229910052786 argon Inorganic materials 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 8
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- 238000005520 cutting process Methods 0.000 claims description 6
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- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 229910000799 K alloy Inorganic materials 0.000 claims description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 4
- 229910001026 inconel Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 235000017899 Spathodea campanulata Nutrition 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052792 caesium Inorganic materials 0.000 claims description 3
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- 239000011591 potassium Substances 0.000 claims description 3
- 229910052701 rubidium Inorganic materials 0.000 claims description 3
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
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- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention provides a device and a method for destroying a liquid metal high-temperature pulsating heat pipe, wherein the device comprises a glove box, the outside of the glove box is provided with the liquid metal high-temperature pulsating heat pipe, a molecular pump unit, a cold trap and an argon bottle, and the inside of the glove box is provided with a liquid metal reaction kettle, a liquid nitrogen spray gun, an ethanol injector and a plurality of vacuum valves; the glove box is of a sealed box body structure, and the interior of the glove box is kept in an inert gas environment through circulation. The working medium in the liquid metal high-temperature pulsating heat pipe is pumped out under the protection of inert gas, the used working medium of the high-temperature pulsating heat pipe is subjected to harmless treatment through controllable chemical reaction under the protection of low-temperature inert gas, and the high-temperature pulsating heat pipe is cleaned, so that the safety risk is reduced to the maximum extent; the method fills the blank of the high-temperature pulsating heat pipe treatment and destruction technology, and solves the problems that the used liquid metal high-temperature pulsating heat pipe cannot be treated, is inconvenient to store and has high risk.
Description
Technical Field
The invention relates to the technical field of pulse heat pipe research, in particular to a device and a method for destroying liquid metal high-temperature pulse heat pipes.
Background
Pulsating heat pipes were first proposed by Akachi in the early 90 s of the 20 th century. Compared with the common heat pipe, the heat pipe has the advantages of simple structure, strong heat transfer capability, low cost and the like. The pulsating heat pipe drives the working medium to oscillate and flow in the pipe by utilizing the pressure difference between a liquid plug and an air plug which are formed in the pipe by the working medium after being heated. In the manufacturing process of the pulsating heat pipe, working media are required to be filled into the capillary under the action of internal and external pressure difference, and after the use is finished, the pulsating heat pipe is required to be subjected to post-treatment, including the steps of extracting toxic, inflammable and explosive working media in the pipe and performing harmless treatment; and carrying out harmless treatment on the pipe and the like. For the pulsating heat pipe with the working temperature lower than 500 ℃, common working media are water, alcohols, acetone and the like, the harmless treatment is more conventional, the post-treatment is simpler, and for the liquid metal high-temperature pulsating heat pipe with the working temperature higher than 500 ℃, the working media can be metal sodium, metal potassium, sodium-potassium alloy and the like with different proportions, and can react when meeting acid, carbon dioxide, moisture and water to release hydrogen, and spontaneous combustion and sometimes even explosion can occur, so that the treatment in the atmospheric environment cannot be carried out, and the post-treatment difficulty is higher.
At present, a post-treatment device and a post-treatment method for a liquid metal high-temperature pulsating heat pipe do not exist, the traditional post-treatment method for the working medium of the pulsating heat pipe cannot be suitable for the high-temperature working medium, and serious potential safety hazards exist when the post-treatment is not carried out on the working medium. Therefore, from the perspective of safety, the invention discloses a liquid metal high-temperature pulsating heat pipe destruction device and method, which are the basis of high-temperature pulsating heat pipe research and application.
Disclosure of Invention
According to the technical problem that the post-treatment difficulty of the liquid metal high-temperature pulsating heat pipe is high, the device and the method for destroying the liquid metal high-temperature pulsating heat pipe are provided. The working medium in the liquid metal high-temperature pulsating heat pipe is pumped out under the protection of inert gas, the used working medium of the high-temperature pulsating heat pipe is subjected to harmless treatment through controllable chemical reaction by using the liquid metal reaction kettle in the glove box under the protection of low-temperature inert gas, and the high-temperature pulsating heat pipe is cleaned, so that the safety risk is reduced to the greatest extent.
The technical means adopted by the invention are as follows:
a liquid metal high-temperature pulsating heat pipe destroying device comprises: the device comprises a glove box, wherein a liquid metal high-temperature pulsating heat pipe, a molecular pump unit, a cold trap and an argon bottle are arranged outside the glove box, and a liquid metal reaction kettle, a liquid nitrogen spray gun, an ethanol injector and a plurality of vacuum valves are arranged inside the glove box; the glove box is of a sealed box body structure, and the interior of the glove box is kept in an inert gas environment through circulation;
a vacuum plug is arranged on a shell at the bottom of the glove box, a liquid charging pipe at the top of the liquid metal high-temperature pulsating heat pipe extends into the inner end of the glove box through the vacuum plug and is communicated with one end of a first vacuumizing pipeline, the connection part of the liquid charging pipe and the vacuum plug ensures sealing, the other end of the first vacuumizing pipeline is communicated with the inside of the liquid metal reaction kettle, and at least one fourth vacuum valve is arranged on the first vacuumizing pipeline; the liquid metal high-temperature pulsating heat pipe is also communicated with one end of a transverse second air inlet pipeline;
the liquid nitrogen spray gun is connected to the top of the liquid metal reaction kettle through a pipeline I and used for spraying liquid nitrogen into the liquid metal reaction kettle, and at least one first vacuum valve is mounted on the pipeline I; the ethanol injector is connected to the top of the liquid metal reaction kettle through a second pipeline, and at least one second vacuum valve is installed on the second pipeline;
the upper part of one side of the liquid metal reaction kettle is communicated with one end of a first exhaust pipeline, at least one third vacuum valve is installed on the first exhaust pipeline, the other end of the first exhaust pipeline and the upper end of a vertical first air inlet pipeline are converged into a pipeline III, the upper part of the pipeline III is communicated with the gas environment in the glove box, and at least one fifth vacuum valve is installed on the pipeline III; the lower end of the first air inlet pipeline extends out of the glove box and is converged with the other end of the second air inlet pipeline into a pipeline four, the pipeline four is communicated with the atmospheric environment, and at least one sixth vacuum valve is mounted on the pipeline four;
the molecular pump unit is connected with a cold trap through a pipeline, the cold trap is connected with one end of a second vacuumizing pipeline, the second vacuumizing pipeline extends into the glove box and is connected with the liquid metal reaction kettle, and at least one seventh vacuum valve is arranged on the second vacuumizing pipeline arranged in the glove box; the argon bottle is communicated with the inside of the glove box through a pipeline and used for supplying air to the glove box.
Further, the liquid metal high-temperature pulsating heat pipe comprises a tubular high-temperature pulsating heat pipe, a plate-type high-temperature pulsating heat pipe or a special-shaped high-temperature pulsating heat pipe.
Further, the liquid metal high-temperature pulsating heat pipe can also be a heat exchanger mainly comprising a pipe type high-temperature pulsating heat pipe, a plate type high-temperature pulsating heat pipe or a special-shaped high-temperature pulsating heat pipe.
Further, the working medium of the liquid metal high-temperature pulsating heat pipe is metal sodium, metal potassium, metal lithium, metal rubidium, metal cesium, sodium-potassium alloys with different proportions, or liquid metal nanofluids with different mass fractions.
Further, the pipe of the liquid metal high-temperature pulsating heat pipe is one of stainless steel, nickel-based alloy and Inconel alloy, or a combination of more than one of the stainless steel, the nickel-based alloy and the Inconel alloy.
Furthermore, the pipe diameter range of the liquid metal high-temperature pulsating heat pipe is 2-12 mm.
Further, the liquid filling rate of the liquid metal high-temperature pulsating heat pipe is 10% -90%.
The invention also provides a destroying method of the liquid metal high-temperature pulsating heat pipe destroying device, which comprises the following steps:
s1, connecting all devices in the glove box, connecting a molecular pump unit, a cold trap and a second vacuumizing pipeline, closing all vacuum valves, and supplying gas to the glove box by using an argon bottle; the glove box is started to circulate until the oxygen content of water in the glove box is less than 0.1ppm;
s2, locally cooling the middle elbow of the liquid metal high-temperature pulsating heat pipe to enable the local surface temperature to be lower than the melting point of the working medium by 50 ℃ and to be maintained for 10 minutes, maintaining the rest parts at normal temperature, selecting two points with a distance of 5cm at the straight pipe part of the middle elbow of the liquid metal high-temperature pulsating heat pipe by using a pipe cutter, respectively cutting off, taking down a section of pipeline with the length of 5cm, connecting the two cut-off points on the liquid metal high-temperature pulsating heat pipe and a second air inlet pipeline by using a tee joint to ensure the air tightness of the connection, and in the process, a small amount of air enters the liquid metal high-temperature pulsating heat pipe, but the amount of the entering air is very small due to the existence of an internal liquid plug; extending a liquid charging pipe of the liquid metal high-temperature pulsating heat pipe into the glove box through a vacuum plug, cutting off a seal of the liquid metal high-temperature pulsating heat pipe in the glove box by using a pipe cutter, connecting the liquid charging pipe with a first vacuumizing pipeline, and ensuring the connection part of the liquid charging pipe and the vacuum plug to be sealed;
s3, opening a seventh vacuum valve, and continuously vacuumizing the connection part of the whole device by using a molecular pump unit to ensure that the vacuum degree in the device is lower than 0.1Pa; opening a fifth vacuum valve, and enabling inert gas in the glove box to enter the liquid metal high-temperature pulsating heat pipe through the first air inlet pipeline and the second air inlet pipeline; slowly opening a fourth vacuum valve, pumping out most of working media under the driving of the inert gas pressure difference, and allowing the working media to enter the liquid metal reaction kettle through a liquid filling pipe, a first vacuum pumping pipeline and the fourth vacuum valve; the pumping speed of the working medium is controlled by controlling the opening degree of the fourth vacuum valve;
s4, after most of working media are pumped into the liquid metal reaction kettle, closing a fourth vacuum valve, a fifth vacuum valve and a seventh vacuum valve; opening a first vacuum valve, continuously spraying liquid nitrogen into the liquid metal reaction kettle through a liquid nitrogen spray gun through the first vacuum valve to ensure that the temperature in the liquid metal reaction kettle is low and the air pressure is kept positive, opening a second vacuum valve, slowly pushing an ethanol injector, dropping the ethanol into the bottom of the liquid metal reaction kettle, observing that the ethanol reacts with a working medium through an observation window of the liquid metal reaction kettle to generate a small fireball and generate hydrogen, opening a third vacuum valve and a sixth vacuum valve, and discharging the generated gas into the air through the third vacuum valve, a first exhaust pipeline, a first air inlet pipeline and the sixth vacuum valve under the action of the nitrogen pressure;
s5, after all the working media in the liquid metal reaction kettle slowly react, closing all the vacuum valves, dismantling and taking out the liquid metal reaction kettle from the glove box, flushing the liquid metal reaction kettle by using a high-pressure water gun outside 3 meters to prevent residual trace working media from burning, finally cleaning the liquid metal reaction kettle by using ethanol, and finishing the work of harmless treatment of the working media in the reaction kettle;
s6, the liquid metal high-temperature pulsating heat pipe is detached from the device, a high-pressure water gun is used for washing the liquid metal high-temperature pulsating heat pipe out of 3 meters, the liquid metal high-temperature pulsating heat pipe is soaked in a water tank which is submerged in the surface for 72 hours, residual working medium in the liquid metal high-temperature pulsating heat pipe is removed, and the work of harmless treatment of the working medium in the pipe is completed.
Compared with the prior art, the invention has the following advantages:
1. the device and the method for destroying the liquid metal high-temperature pulsating heat pipe fill the blank of the high-temperature pulsating heat pipe treatment and destruction technology, and solve the problems that the used liquid metal high-temperature pulsating heat pipe cannot be treated, is inconvenient to store and has high risk. Under the protection of inert gas, the working medium in the liquid metal high-temperature pulsating heat pipe is pumped out, under the protection of low-temperature inert gas, the used working medium of the high-temperature pulsating heat pipe is subjected to harmless treatment through controllable chemical reaction, and the high-temperature pulsating heat pipe is cleaned, so that the safety risk is reduced to the maximum extent.
2. According to the device and the method for destroying the liquid metal high-temperature pulsating heat pipe, provided by the invention, the reaction process of the working medium is carried out in the low-temperature inert gas and pressure-resistant reaction kettle, the reaction speed can be controlled, and the safety of the liquid metal high-temperature pulsating heat pipe destroying process is ensured.
3. Compared with the conventional high-temperature steam treatment mode of liquid metal, the device and the method for destroying the liquid metal high-temperature pulsating heat pipe have the advantages of low cost, simple structure and capability of treating residual liquid metal in the capillary.
In conclusion, the technical scheme of the invention can solve the problem of high difficulty in post-treatment of the liquid metal high-temperature pulsating heat pipe in the prior art.
Based on the reason, the invention can be widely popularized in the fields of pulsating heat pipes and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a post-processing device for a high-temperature pulsating liquid metal heat pipe according to the present invention.
In the figure: 1. liquid metal high-temperature pulsating heat pipe; 2. a molecular pump unit; 3. cold trap; 4. a liquid metal reaction kettle; 5. a liquid nitrogen spray gun; 6. an ethanol injector; 7. a glove box; 8. an argon bottle; 9. a liquid filling pipe; 10. a vacuum plug; 11. a first vacuum-pumping pipeline; 12. a second vacuum pumping pipeline; 13. a first exhaust line; 14. a first air intake line; 15. a second air intake line; 16. a first vacuum valve; 17. a second vacuum valve; 18. a third vacuum valve; 19. a fourth vacuum valve; 20. a fifth vacuum valve; 21. a sixth vacuum valve; 22. and a seventh vacuum valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
In the description of the present invention, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings for the convenience of description and simplicity of description, and that these directional terms, unless otherwise specified, do not indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1, the present invention provides a liquid metal high temperature pulsating heat pipe destruction apparatus, comprising: the device comprises a glove box 7, wherein an inert gas environment can be maintained in the glove box 7 through circulation, and a liquid metal reaction kettle 4, a liquid nitrogen spray gun 5, an ethanol injector 6, a first vacuumizing pipeline 11, a first exhaust pipeline 13 and at least 6 vacuum valves are arranged in the glove box 7. A liquid charging pipe 9 of the liquid metal high-temperature pulsating heat pipe 1 extends into the glove box 7 through a vacuum plug 10, the connection part of the liquid charging pipe 9 and the vacuum plug 10 is sealed, and the other end of the liquid charging pipe 9 is located inside the glove box 7 and connected with a first vacuum pumping pipeline 11. The first vacuum pumping pipeline 11 is connected with a fourth vacuum valve 19, and the other end of the fourth vacuum valve 19 is connected with the liquid metal reaction kettle 4 through a pipeline. The liquid nitrogen spray gun 5 is positioned at the top of the liquid metal reaction kettle 4, is connected with the liquid metal reaction kettle 4 through a first vacuum valve 16 and is used for spraying liquid nitrogen into the liquid metal reaction kettle 4. The ethanol injector 6 is positioned at the top of the liquid metal reaction kettle 4 and is connected with the liquid metal reaction kettle 4 through a second vacuum valve 17. The upper part of the right side of the liquid metal reaction kettle 4 is connected with a third vacuum valve 18 through a pipeline, the right side of the third vacuum valve 18 is connected with a first exhaust pipeline 13, the right side of the first exhaust pipeline 13 is vertically connected with a first air inlet pipeline 14, a fifth vacuum valve 20 is connected above the first air inlet pipeline 14, the upper part of the fifth vacuum valve 20 is connected with the gas environment in the glove box, the lower part of the first air inlet pipeline 14 is transversely connected with a second air inlet pipeline 15, the right side of the second air inlet pipeline 15 is connected with a sixth vacuum valve 21, and the right side of the sixth vacuum valve 21 is connected with the atmospheric environment. The left side of the second air inlet pipeline 15 is connected with the liquid metal high-temperature pulsating heat pipe 1. The argon bottle 8 is arranged outside the glove box and supplies air to the glove box.
The outside of the glove box is also provided with a molecular pump unit 2 and a cold trap 3, the molecular pump unit 2 is connected with the cold trap 3, the cold trap 3 is connected with a seventh vacuum valve 22 through a second vacuum pumping pipeline 12, the right side of the seventh vacuum valve 22 is connected with a liquid metal reaction kettle 4 through a pipeline to vacuumize the reaction kettle and the connected pipeline, and the cold trap 3 is used for protecting the vacuum pump unit 2.
As a preferred embodiment, the liquid metal high-temperature pulsating heat pipe includes a tubular high-temperature pulsating heat pipe, a plate high-temperature pulsating heat pipe, a special-shaped high-temperature pulsating heat pipe, and the like, and also includes a heat exchanger mainly including a tubular high-temperature pulsating heat pipe, a plate high-temperature pulsating heat pipe, a special-shaped high-temperature pulsating heat pipe, and the like.
In a preferred embodiment, the working medium of the liquid metal high-temperature pulsating heat pipe is metal sodium, or metal potassium, or metal lithium, metal rubidium, or metal cesium, or sodium-potassium alloys with different proportions, or liquid metal nanofluids with different mass fractions.
In a preferred embodiment, the tube of the liquid metal high temperature pulsating heat pipe is one of stainless steel, nickel-based alloy or Inconel alloy, or a combination of more than one of them.
In a preferred embodiment, the diameter of the liquid metal high-temperature pulsating heat pipe is in the range of 2-12 mm.
In a preferred embodiment, the liquid filling rate of the liquid metal high-temperature pulsating heat pipe is 10% to 90%.
The invention also provides a destroying method of the liquid metal high-temperature pulsating heat pipe destroying device, which comprises the following specific implementation steps:
1. the devices in the glove box 7 are connected, the molecular pump unit 2, the cold trap 3 and the second vacuumizing pipeline 12 are connected, all vacuum valves are closed, and the glove box is supplied with air by using an argon bottle 8. The glove box 7 was turned on in the circulation mode until the oxygen content of water in the glove box 7 was less than 0.1ppm.
2. The method comprises the steps of locally cooling a middle elbow of the liquid metal high-temperature pulsating heat pipe 1 to enable the local surface temperature to be lower than the melting point of a working medium by 50 ℃ and maintain for 10 minutes, maintaining the rest parts at normal temperature, selecting two points with a distance of 5cm at a straight pipe part of the middle elbow of the liquid metal high-temperature pulsating heat pipe 1 by using a pipe cutter, respectively cutting off, taking down a section of pipeline with the length of 5cm, connecting two cut-off points on the liquid metal high-temperature pulsating heat pipe 1 and a second air inlet pipeline 15 by using a tee joint to ensure the air tightness of connection, and in the process, a small amount of air enters the liquid metal high-temperature pulsating heat pipe 1, but due to the existence of an internal liquid plug, the amount of the entering air is small. The liquid filling pipe 9 of the liquid metal high-temperature pulsating heat pipe 1 extends into the glove box 7 through the vacuum plug 10, a pipe cutter is used for cutting off the seal of the liquid metal high-temperature pulsating heat pipe 1 in the glove box 7, the liquid filling pipe 9 is connected with the first vacuum pumping pipeline 11, and the connection part of the liquid filling pipe 9 and the vacuum plug 10 is guaranteed to be sealed.
3. And opening a seventh vacuum valve 22, and continuously vacuumizing the connection part of the whole system by using the molecular pump unit 2 to ensure that the vacuum degree in the system is lower than 0.1Pa. And opening the fifth vacuum valve 20, and allowing the inert gas in the glove box 7 to enter the liquid metal high-temperature pulsating heat pipe 1 through the first air inlet pipeline 14 and the second air inlet pipeline 15. And slowly opening the fourth vacuum valve 19, pumping out most of the working medium under the driving of the inert gas pressure difference, and allowing the working medium to enter the liquid metal reaction kettle 4 through the liquid filling pipe 9, the first vacuum pumping pipeline 11 and the fourth vacuum valve 19. The pumping speed of the working medium is controlled by controlling the opening degree of the fourth vacuum valve 19.
4. After most of the working medium is pumped into the liquid metal reaction kettle 4, the fourth vacuum valve 19, the fifth vacuum valve 20 and the seventh vacuum valve 22 are closed. Opening the first vacuum valve 16, continuously spraying liquid nitrogen into the liquid metal reaction kettle 4 through the first vacuum valve 16 by the liquid nitrogen spray gun, ensuring that the temperature in the liquid metal reaction kettle 4 is low and the air pressure is kept positive, opening the second vacuum valve 17, slowly pushing the ethanol injector 6, dropping ethanol into the bottom of the liquid metal reaction kettle 4, observing the ethanol and the working medium through an observation window of the reaction kettle to react to generate a small fireball and generate hydrogen, opening the third vacuum valve 18 and the sixth vacuum valve 21, and discharging the generated gas into the air through the third vacuum valve 18, the first exhaust pipeline 13, the first air inlet pipeline 14 and the sixth vacuum valve 21 under the action of the nitrogen pressure.
5. After the working medium in the liquid metal reaction kettle 4 completely slowly reacts, all vacuum valves are closed, the liquid metal reaction kettle 4 is detached from the glove box 7 and taken out, a high-pressure water gun is used for washing the liquid metal reaction kettle 4 out of 3 meters, residual trace working medium is prevented from being combusted, and finally ethanol is used for cleaning the liquid metal reaction kettle 4 to complete the work of harmless treatment of the working medium in the reaction kettle.
6. And (3) dismantling the liquid metal high-temperature pulsating heat pipe 1 from the system, flushing the liquid metal high-temperature pulsating heat pipe 1 by using a high-pressure water gun outside 3 m, soaking in a water tank which is submerged in the surface for 72 hours, removing the residual working medium inside, and finishing the work of harmless treatment of the working medium in the pipe.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a liquid metal high temperature pulsation heat pipe destroys device which characterized in that includes: the device comprises a glove box (7), wherein a liquid metal high-temperature pulsating heat pipe (1), a molecular pump unit (2), a cold trap (3) and an argon bottle (8) are arranged outside the glove box (7), and a liquid metal reaction kettle (4), a liquid nitrogen spray gun (5), an ethanol injector (6) and a plurality of vacuum valves are arranged inside the glove box (7); the glove box (7) is of a sealed box structure, and the interior of the glove box is kept in an inert gas environment through circulation;
a vacuum plug (10) is arranged on a shell at the bottom of the glove box (7), the inner end, extending into the glove box (7), of a liquid metal high-temperature pulsating heat pipe (1) through the vacuum plug (10) is communicated with one end of a first vacuum-pumping pipeline (11), the connection part of the liquid-filling pipe (9) and the vacuum plug (10) is guaranteed to be sealed, the other end of the first vacuum-pumping pipeline (11) is communicated with the inside of the liquid metal reaction kettle (4), and at least one fourth vacuum valve (19) is arranged on the first vacuum-pumping pipeline (11); the liquid metal high-temperature pulsating heat pipe (1) is also communicated with one end of a transverse second air inlet pipeline (15);
the liquid nitrogen spray gun (5) is connected to the top of the liquid metal reaction kettle (4) through a pipeline I and used for spraying liquid nitrogen into the liquid metal reaction kettle (4), and at least one first vacuum valve (16) is installed on the pipeline I; the ethanol injector (6) is connected to the top of the liquid metal reaction kettle (4) through a second pipeline, and at least one second vacuum valve (17) is installed on the second pipeline;
the upper part of one side of the liquid metal reaction kettle (4) is communicated with one end of a first exhaust pipeline (13), at least one third vacuum valve (18) is installed on the first exhaust pipeline (13), the other end of the first exhaust pipeline (13) and the upper end of a vertical first air inlet pipeline (14) are converged into a pipeline III, the upper part of the pipeline III is communicated with the gas environment in the glove box (7), and at least one fifth vacuum valve (20) is installed on the pipeline III; the lower end of the first air inlet pipeline (14) extends out of the glove box (7) and is converged with the other end of the second air inlet pipeline (15) to a pipeline IV, the pipeline IV is communicated with the atmospheric environment, and at least one sixth vacuum valve (21) is arranged on the pipeline IV; the left side of the second air inlet pipeline (15) is connected with the liquid metal high-temperature pulsating heat pipe (1);
the molecular pump unit (2) is connected with the cold trap (3) through a pipeline, the cold trap (3) is connected with one end of a second vacuumizing pipeline (12), the second vacuumizing pipeline (12) extends into the glove box (7) to be connected with the liquid metal reaction kettle (4), and at least one seventh vacuum valve (22) is installed on the second vacuumizing pipeline (12) arranged in the glove box (7); the argon bottle (8) is communicated with the interior of the glove box (7) through a pipeline and used for supplying air to the glove box (7).
2. The liquid metal high-temperature pulsating heat pipe destruction device according to claim 1, wherein the liquid metal high-temperature pulsating heat pipe (1) comprises a tubular high-temperature pulsating heat pipe, a plate-type high-temperature pulsating heat pipe or a profiled high-temperature pulsating heat pipe.
3. The liquid metal high-temperature pulsating heat pipe destruction device according to claim 1 or 2, wherein the liquid metal high-temperature pulsating heat pipe (1) is also a heat exchanger mainly composed of a tubular high-temperature pulsating heat pipe, a plate-type high-temperature pulsating heat pipe or a special-shaped high-temperature pulsating heat pipe.
4. The liquid metal high-temperature pulsating heat pipe destruction device according to claim 1, wherein the working medium of the liquid metal high-temperature pulsating heat pipe (1) is metallic sodium, or metallic potassium, or metallic lithium, or metallic rubidium, or metallic cesium, or sodium-potassium alloys with different proportions, or liquid metal nanofluids with different mass fractions.
5. The liquid metal high temperature pulsating heat pipe destruction device according to claim 1, wherein the pipe material of the liquid metal high temperature pulsating heat pipe (1) is one of stainless steel, nickel-based alloy or Inconel alloy, or a combination of more than one of them.
6. The liquid metal high-temperature pulsating heat pipe destruction device according to claim 1, wherein the pipe diameter of the liquid metal high-temperature pulsating heat pipe (1) is in the range of 2-12 mm.
7. The liquid metal high-temperature pulsating heat pipe destruction device according to claim 1, wherein the liquid filling rate of the liquid metal high-temperature pulsating heat pipe (1) is 10% -90%.
8. The destruction method of the liquid metal high-temperature pulsating heat pipe destruction device according to any one of claims 1 to 7, characterized by comprising the following steps:
s1, connecting all devices in a glove box (7), connecting a molecular pump unit (2), a cold trap (3) and a second vacuumizing pipeline (12), closing all vacuum valves, and supplying gas to the glove box (7) by using an argon bottle (8); the circulation mode of the glove box (7) is started until the oxygen content of water in the glove box (7) is less than 0.1ppm;
s2, locally cooling a middle elbow of the liquid metal high-temperature pulsating heat pipe (1), enabling the local surface temperature to be lower than the melting point of a working medium by 50 ℃ and maintaining for 10 minutes, maintaining the rest parts at normal temperature, selecting two points with a distance of 5cm at a straight pipe part of the middle elbow of the liquid metal high-temperature pulsating heat pipe (1) by using a pipe cutter, respectively cutting off, taking off a section of pipeline with the length of 5cm, connecting two cut-off points on the liquid metal high-temperature pulsating heat pipe (1) and a second air inlet pipeline (15) by using a tee joint, and ensuring the air tightness of connection; a liquid filling pipe (9) of the liquid metal high-temperature pulsating heat pipe (1) extends into a glove box (7) through a vacuum plug (10), a pipe cutter is used for cutting off a seal of the liquid metal high-temperature pulsating heat pipe (1) in the glove box (7), the liquid filling pipe (9) is connected with a first vacuum pumping pipeline (11), and the connection part of the liquid filling pipe (9) and the vacuum plug (10) is sealed;
s3, opening a seventh vacuum valve (22), and continuously vacuumizing the connection part of the whole device by using a molecular pump unit (2) to ensure that the vacuum degree in the device is lower than 0.1Pa; opening a fifth vacuum valve (20), and enabling inert gas in the glove box (7) to enter the liquid metal high-temperature pulsating heat pipe (1) through a first air inlet pipeline (14) and a second air inlet pipeline (15); slowly opening a fourth vacuum valve (19), pumping out most of working media under the driving of the inert gas pressure difference, and entering the liquid metal reaction kettle (4) through a liquid filling pipe (9), a first vacuum pumping pipeline (11) and the fourth vacuum valve (19); the pumping speed of the working medium is controlled by controlling the opening degree of the fourth vacuum valve (19);
s4, after most of working media are pumped into the liquid metal reaction kettle (4), closing the fourth vacuum valve (19), the fifth vacuum valve (20) and the seventh vacuum valve (22); opening a first vacuum valve (16), continuously spraying liquid nitrogen into the liquid metal reaction kettle (4) through a liquid nitrogen spray gun (5) through the first vacuum valve (16) to ensure that the temperature in the liquid metal reaction kettle (4) is low and the air pressure is kept positive, opening a second vacuum valve (17), slowly pushing an ethanol injector (6), dropping ethanol into the bottom of the liquid metal reaction kettle (4), observing that the ethanol reacts with a working medium through an observation window of the liquid metal reaction kettle (4) to generate small fire balls and generate hydrogen, opening a third vacuum valve (18) and a sixth vacuum valve (21), and discharging the generated gas into the air through the third vacuum valve (18), a first exhaust pipeline (13), a first air inlet pipeline (14) and the sixth vacuum valve (21) under the action of the nitrogen pressure;
s5, after all the working media in the liquid metal reaction kettle (4) slowly react, closing all vacuum valves, detaching and taking out the liquid metal reaction kettle (4) from the glove box (7), flushing the liquid metal reaction kettle (4) by using a high-pressure water gun outside 3 m to prevent residual trace working media from burning, finally cleaning the liquid metal reaction kettle (4) by using ethanol, and finishing work of harmless treatment of the working media in the reaction kettle;
s6, the liquid metal high-temperature pulsating heat pipe (1) is detached from the device, a high-pressure water gun is used for washing the liquid metal high-temperature pulsating heat pipe (1) out of 3 meters, the liquid metal high-temperature pulsating heat pipe is soaked in a water tank which is submerged in the surface for 72 hours, residual working media in the liquid metal high-temperature pulsating heat pipe are removed, and the work of harmless treatment of the working media in the pipe is completed.
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| CN202210219228.4A CN114700355B (en) | 2022-03-08 | 2022-03-08 | Device and method for destroying liquid metal high-temperature pulsating heat pipe |
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| CN202210219228.4A CN114700355B (en) | 2022-03-08 | 2022-03-08 | Device and method for destroying liquid metal high-temperature pulsating heat pipe |
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| CN104075600B (en) * | 2014-06-30 | 2016-04-13 | 中国航天空气动力技术研究院 | The solid-state working medium filling equipment of a kind of pair of process interface heat pipe and methods for filling |
| CN107436106B (en) * | 2017-09-12 | 2023-05-05 | 大连海事大学 | Liquid filling device and method for liquid metal high-temperature pulsating heat pipe |
| CN210464154U (en) * | 2019-08-20 | 2020-05-05 | 大连海事大学 | Pulsating heat pipe based on liquid metal mixed working medium |
| CN111750714B (en) * | 2020-06-15 | 2021-11-16 | 大连海事大学 | Device and method for multiple filling and working medium adjusting of high-temperature pulsating heat pipe |
| CN113372192B (en) * | 2021-06-10 | 2022-09-06 | 江苏诺盟氢能技术有限公司 | Synthetic method of low-carbon sodium alkoxide |
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