CN118059704A - Mixer suitable for high-temperature liquid metal mixing and cooling - Google Patents
Mixer suitable for high-temperature liquid metal mixing and cooling Download PDFInfo
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- CN118059704A CN118059704A CN202410397257.9A CN202410397257A CN118059704A CN 118059704 A CN118059704 A CN 118059704A CN 202410397257 A CN202410397257 A CN 202410397257A CN 118059704 A CN118059704 A CN 118059704A
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- temperature
- inlet pipe
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- liquid metal
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- 229910001338 liquidmetal Inorganic materials 0.000 title claims abstract description 27
- 238000001816 cooling Methods 0.000 title claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 36
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910001152 Bi alloy Inorganic materials 0.000 claims description 3
- JWZCKIBZGMIRSW-UHFFFAOYSA-N lead lithium Chemical compound [Li].[Pb] JWZCKIBZGMIRSW-UHFFFAOYSA-N 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 229910000978 Pb alloy Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 230000008646 thermal stress Effects 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 2
- 230000008676 import Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 206010016256 fatigue Diseases 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The invention discloses a mixer suitable for mixing and cooling high-temperature liquid metal, which comprises an outer shell and an inner rotary component. The shell comprises a cylinder body, a high-temperature reducing inlet pipe, a sealing head, a low-temperature inlet pipe and a mixing outlet pipe, wherein the high-temperature reducing inlet pipe is arranged at one end of the cylinder body, the sealing head is arranged at the other end of the cylinder body and connected with the low-temperature inlet pipe, and the mixing outlet pipe is arranged at the side of the cylinder body and close to the low-temperature inlet pipe; the inner rotation flow component comprises a central tube, blind plates, helical blades, a baffle and an inner cylinder, the inner rotation flow component is positioned in the outer shell and connected with the outer shell through the inner cylinder, the helical blades and the central tube are coaxially arranged and form a helical flow passage with the inner wall of the cylinder, one end of the central tube penetrates through the baffle, the other end of the central tube is sealed by the blind plates, a plurality of through holes are sequentially formed in the tube wall according to the trend of the helical blades, and the baffle is connected with the inner cylinder. The mixer has no flow dead zone, excellent mixing performance and reduced fatigue damage risk caused by local thermal stress generated by temperature difference and cold and hot fluid impact.
Description
Technical Field
The invention relates to temperature regulation of an experimental loop in scientific research, in particular to a mixer suitable for mixing and cooling high-temperature liquid metal.
Background
In the nuclear energy field, liquid metals such as lead, lead bismuth alloy, lithium lead and the like play a critical role of a coolant in a fission reactor and even a future fusion reactor by virtue of excellent neutron buffering property and efficient heat conduction property. Because of their unique physical properties, these liquid metals not only help to maintain neutron flux at a suitable level, but also rapidly and efficiently remove the large amounts of heat generated by the reactor, thereby achieving efficient conversion of nuclear energy to electrical energy. In order to ensure safe and efficient operation of the liquid metal cooled reactor at high temperatures, intensive research and evaluation of the inherent thermodynamic and hydraulic properties is particularly necessary. The construction of high temperature liquid metal circuits is one of the core links, whereas mixers are introduced as a key technical component aimed at optimizing the temperature regulation. Compared with the traditional heat exchanger, the mixer has simple structure, lower manufacturing cost and higher operation flexibility.
Due to the nature of high temperature liquid metal, mixers in a circuit often face the following challenges: (1) The significant temperature difference during cold and hot liquid metal intersection is prone to generate highly concentrated local thermal stress; (2) Alternating shocks of cold and hot fluids present a potential risk of fatigue failure; (3) high temperature liquid metal flows are often accompanied by severe corrosion. The existing mixer often adopts a main pipeline made of single materials to communicate with a lateral connected branch pipeline, and a mixing unit is embedded in the main pipeline, so that the normal working temperature range of the mixer and the structural materials used by the mixer are not enough to meet the severe requirements of the running environment of high-temperature liquid metal, accidents such as structural failure and the like are very easy to occur at the connection position of the main pipeline and the branch pipeline, and the stability and the safety of the integral structure of the mixer cannot be ensured even if the thickness of the pipe wall is increased. Therefore, more scientifically advanced design and material solutions must be sought to address engineering challenges under complex operating conditions.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a mixer suitable for mixing and cooling high-temperature liquid metal, which can realize excellent mixing efficiency and ensure excellent structural strength and long-term durability.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The utility model provides a blender suitable for mixed cooling of high temperature liquid metal, includes shell body and internal rotation flow subassembly, the shell body includes barrel, high temperature reducing import pipe, head, low temperature import pipe, mixing outlet pipe, internal rotation flow subassembly includes center tube, blind plate, helical blade, baffle, inner tube, and low temperature fluid flows in by barrel, head, baffle, the cavity that the inner tube constitutes from low temperature import pipe, gets into the center tube through the cavity, and low temperature fluid sprays out from the through-hole on the center tube and mixes with the high temperature fluid from high temperature reducing import pipe, and the fluid after mixing flows around the center tube spiral along the runner that comprises helical blade and barrel, finally flows from mixing outlet pipe.
Further, the liquid metal is lead, a lithium lead alloy or a lead bismuth alloy.
Further, the mixer adopts a high-temperature resistant material as a structural material, and the high-temperature resistant material is a high-temperature nickel-based alloy, a molybdenum-based alloy or a tungsten-based alloy.
Further, the low-temperature inlet pipe is arranged at a position relatively far away from the high-temperature reducing inlet pipe, the flowing directions of the low-temperature fluid and the high-temperature fluid are relatively arranged, the low-temperature fluid flows in from the low-temperature inlet pipe, the high-temperature fluid flows in from the reducing pipe inlet, and the mixed fluid formed after the low-temperature fluid and the high-temperature fluid are effectively mixed in the low-temperature inlet pipe flows out from the mixed outlet pipe positioned at the side of the cylinder body.
Further, the cavity formed by the cylinder body, the sealing head, the baffle plate and the inner cylinder is used as a buffer space, so that a large temperature difference is avoided at the connection position of the low-temperature inlet pipe and the sealing head.
Further, one end of the central tube passes through the baffle plate, and the other end of the central tube is sealed by a blind plate; through holes with the diameter of 10 mm-30 mm are sequentially formed in four sides of the side wall, namely in the upper direction, the lower direction, the left direction and the right direction, of the central tube end area close to the blind plate according to the winding track of the spiral blade, the arrangement of the through holes follows the advancing direction of the spiral blade, and the distance s of the through holes in each direction is identical with the pitch of the spiral blade.
Further, the helical blade is fixed on the outer side of the central tube, the distance n between the helical blade and the central tube is 1mm, the helical blade is connected with the inner wall of the cylinder by spot welding, the distance m between the outer edge of the helical blade and the inner wall of the cylinder is 1-3 mm, the included angle between one end of the helical blade, which is close to the high-temperature inlet, and the horizontal line is minus 90 degrees, and the included angle theta between one end, which is close to the mixing outlet and the horizontal line is 0-45 degrees.
Compared with the existing mixer, the invention has the beneficial effects that:
1. the mixer improves the positions of the fluid inlet and the fluid outlet and the internal structure, effectively reduces the local thermal stress caused by temperature difference by changing the positions of the branch pipes, arranging the cavities and the central tube with heat exchange function, and ensures the safety and the stability of the structure.
2. The internal rotation flow component of the mixer can enable preheated low-temperature fluid to be sprayed out through the precisely arranged through holes, and high-efficiency spraying and mixing with high-temperature fluid are achieved. Meanwhile, the spiral blade is particularly applied to the interior of the mixer as a core mixing structure, so that the actual mixing length of the fluid can be effectively prolonged, and the fluid can be induced to generate powerful vortex and turbulence effects, thereby greatly improving the mixing efficiency and uniformity and reducing the potential fatigue damage risk.
Drawings
Fig. 1 is a cross-sectional view of a mixer suitable for mixing and cooling high temperature liquid metal in accordance with the present invention.
Fig. 2 is a cross-sectional view of a post-mixing swirl transition section of a mixer suitable for high temperature liquid metal mixing and cooling in accordance with the present invention.
FIG. 3 is a block diagram of a rotating assembly in a mixer suitable for mixing and cooling high temperature liquid metal in accordance with the present invention.
In the figure: 1. a cylinder; 2. a high temperature variable diameter inlet pipe; 3. a seal head; 4. a low temperature inlet pipe; 5. a mixing outlet tube; 6. a central tube; 7. a blind plate; 8. a helical blade; 9. a baffle; 10. an inner cylinder; 11. and a through hole.
Detailed Description
The following describes the embodiments of the present invention with reference to the drawings.
Example 1
As shown in fig. 1-3, the mixer suitable for mixing and cooling high-temperature liquid metal comprises an outer shell and an inner rotary component, wherein the outer shell comprises a cylinder body 1, a high-temperature reducing inlet pipe 2, a sealing head 3, a low-temperature inlet pipe 4 and a mixing outlet pipe 5, and the inner rotary component comprises a central pipe 6, a blind plate 7, a helical blade 8, a baffle plate 9 and an inner cylinder 10. The left side of the outer shell is provided with a high-temperature variable-diameter inlet pipe 2, the right side of the outer shell is provided with a sealing head 3 and is connected with a low-temperature inlet pipe 4, and a mixing outlet pipe 5 is arranged at the side of the cylinder 1 and near the low-temperature inlet pipe 4; the inner rotary component is positioned in the outer shell and is connected with the outer shell through the inner barrel 10, the helical blade 8 and the central tube 6 are coaxially arranged, the distance n between the helical blade 8 and the central tube 6 is 1mm, the helical blade 8 and the inner wall of the barrel 1 form a helical flow passage by adopting spot welding, the distance m between the outer edge of the helical blade 8 and the inner wall of the barrel 1 is 1mm, the included angle between one end of the helical blade 8, which is close to the high-temperature inlet, and the horizontal line is minus 90 degrees, and the included angle theta between one end, which is close to the mixing outlet, and the horizontal line is 24 degrees; one end of the central tube 6 passes through the baffle 9, the other end is sealed by adopting the blind plate 7, a total of 8 through holes 11 of a-h are sequentially formed in the upper, lower, left and right directions according to the trend of the spiral blade 8 on the side wall of the central tube 6 close to one end of the blind plate 7, the diameters of the through holes 11 are 20mm, and the distance s between the through holes in each direction is 85mm; the baffle 9 is connected with the inner cylinder 10 to isolate the cryogenic fluid from the mixed fluid.
The low-temperature fluid flows into a cavity formed by the cylinder body 1, the sealing head 3, the baffle 9 and the inner cylinder 10 through the low-temperature inlet pipe 4, enters the central pipe 6 through the cavity, is preheated in the central pipe 6 by the mixed fluid in the spiral flow channel, then sequentially sprays and flows out from the through hole 11 to be mixed with the high-temperature fluid from the high-temperature reducing inlet pipe 2, the mixed fluid spirally flows around the central pipe 6 along the flow channel formed by the spiral blades 8 and the cylinder body 1, the low-temperature fluid before being not mixed is preheated, and finally flows out from the mixed outlet pipe 5.
In one embodiment, the diameter of the central tube 6, the diameter of the cylinder body 1 and the axial length can be adjusted according to the flow or the required mixing effect, the number and the size of the through holes 11 on the central tube 6 can be adjusted, and the pitch and the diameter of the helical blades 8 can be changed.
In the description of the present invention, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the description of the present invention, a description of the terms "one embodiment," "an example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or communicating between the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (7)
1. The utility model provides a blender suitable for high temperature liquid metal mixes cooling which characterized in that: the mixer comprises an outer shell and an internal rotation assembly, wherein the outer shell comprises a cylinder body (1), a high-temperature reducing inlet pipe (2), a sealing head (3), a low-temperature inlet pipe (4) and a mixing outlet pipe (5), the internal rotation assembly comprises a central pipe (6), a blind plate (7), a spiral blade (8), a baffle plate (9) and an inner cylinder (10), low-temperature fluid flows into a cavity formed by the cylinder body (1), the sealing head (3), the baffle plate (9) and the inner cylinder (10) from the low-temperature inlet pipe (4), enters the central pipe (6) through the cavity, is sprayed and flows out from a through hole (11) on the central pipe (6) to be mixed with the high-temperature fluid from the high-temperature reducing inlet pipe (2), and the mixed fluid flows spirally around the central pipe (6) along a flow channel formed by the spiral blade (8) and the cylinder body (1), and finally flows out from the mixing outlet pipe (5).
2. A mixer suitable for mixing and cooling high temperature liquid metal according to claim 1, wherein: the liquid metal is lead, lithium lead alloy and lead bismuth alloy.
3. A mixer suitable for mixing and cooling high temperature liquid metal according to claim 1, wherein: the mixer adopts a high-temperature resistant material as a structural material, and the high-temperature resistant material is a high-temperature nickel-based alloy, a molybdenum-based alloy or a tungsten-based alloy.
4. A mixer suitable for mixing and cooling high temperature liquid metal according to claim 1, wherein: the low-temperature inlet pipe (4) is arranged at a position relatively far away from the high-temperature reducing inlet pipe (2), the flowing directions of the low-temperature fluid and the high-temperature fluid are relatively arranged, the low-temperature fluid flows in from the low-temperature inlet pipe (4), the high-temperature fluid flows in from the inlet of the high-temperature reducing inlet pipe (2), and the mixed fluid formed after the low-temperature fluid and the high-temperature fluid are effectively mixed inside flows out from the mixed outlet pipe (5) positioned at the side of the cylinder body (1).
5. A mixer suitable for mixing and cooling high temperature liquid metal according to claim 1, wherein: the cavity formed by the cylinder body (1), the seal head (3), the baffle (9) and the inner cylinder (10) is used as a buffer space, so that a large temperature difference exists at the connection position of the low-temperature inlet pipe (4) and the seal head (3).
6. A mixer suitable for mixing and cooling high temperature liquid metal according to claim 1, wherein: one end of the central tube (6) passes through the baffle (9), and the other end is sealed by a blind plate (7); through holes (11) with the diameter of 10 mm-30 mm are sequentially formed in four sides of the side wall, namely in the upper, lower, left and right directions, of the tail end area of the central tube (6) close to the blind plate (7) according to the winding track of the spiral blade (8), the arrangement of the through holes (11) follows the advancing direction of the spiral blade (8), and the spacing s of the through holes (11) in each direction is identical with the pitch of the spiral blade (8).
7. A mixer suitable for mixing and cooling high temperature liquid metal according to claim 1, wherein: the spiral blade (8) is fixed on the outer wall of the central tube (6), the distance n between the spiral blade and the outer wall of the central tube (6) is 1mm, the connection is realized by spot welding, the distance m between the outer edge of the spiral blade (8) and the inner wall of the cylinder (1) is 1-3 mm, the included angle between one end of the spiral blade (8) close to the high-temperature inlet and the horizontal line is-90 degrees, and the included angle theta between one end of the spiral blade close to the mixing outlet and the horizontal line is 0-45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410397257.9A CN118059704A (en) | 2024-04-03 | 2024-04-03 | Mixer suitable for high-temperature liquid metal mixing and cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410397257.9A CN118059704A (en) | 2024-04-03 | 2024-04-03 | Mixer suitable for high-temperature liquid metal mixing and cooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118059704A true CN118059704A (en) | 2024-05-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410397257.9A Pending CN118059704A (en) | 2024-04-03 | 2024-04-03 | Mixer suitable for high-temperature liquid metal mixing and cooling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118059704A (en) |
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2024
- 2024-04-03 CN CN202410397257.9A patent/CN118059704A/en active Pending
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