CN220270102U - Flash smelting waste heat recovery boiler using composite crystallization film - Google Patents
Flash smelting waste heat recovery boiler using composite crystallization film Download PDFInfo
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- CN220270102U CN220270102U CN202321634562.2U CN202321634562U CN220270102U CN 220270102 U CN220270102 U CN 220270102U CN 202321634562 U CN202321634562 U CN 202321634562U CN 220270102 U CN220270102 U CN 220270102U
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- chamber
- flue gas
- tube bundle
- flue
- radiation
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- 239000002131 composite material Substances 0.000 title claims abstract description 40
- 238000002425 crystallisation Methods 0.000 title claims abstract description 24
- 230000008025 crystallization Effects 0.000 title claims abstract description 24
- 239000002918 waste heat Substances 0.000 title claims abstract description 24
- 238000003723 Smelting Methods 0.000 title claims abstract description 23
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000003546 flue gas Substances 0.000 claims abstract description 53
- 230000005855 radiation Effects 0.000 claims abstract description 46
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 230000000903 blocking effect Effects 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000000428 dust Substances 0.000 claims description 16
- 239000011449 brick Substances 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 239000011819 refractory material Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 239000002893 slag Substances 0.000 description 14
- 239000002245 particle Substances 0.000 description 13
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000000779 smoke Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000004939 coking Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A flash smelting waste heat recovery boiler using a composite crystallization film comprises a flue gas chamber (1), wherein an air inlet flue (2) is arranged on the left side of the flue gas chamber (1), and a tail flue (3) is arranged on the right side of the flue gas chamber (1); the inner surface of the top wall of the flue gas chamber (1) is provided with a ceiling water-cooling wall (9), the flue gas chamber (1) is divided into a radiation chamber (4) and a convection chamber (5), the radiation chamber (4) is provided with a radiation screen hanging tube bundle (6), and the convection chamber (5) is provided with a convection screen hanging tube bundle (7); an ash bucket (12) is arranged at the lower part of the radiation chamber (4); the surfaces of the air inlet flue (2), the inner wall of the flue gas chamber (1), the ceiling water-cooled wall (9), the radiation screen hanging tube bundle (6), the convection screen hanging tube bundle (7), the tail flue (3) and the ash bucket (12) are coated with composite crystalline films. The waste heat recovery boiler provided by the utility model can improve the service life and the safety of the device, the heat exchange effect and the overall stability and energy-saving effect of a flash smelting process.
Description
Technical Field
The utility model belongs to the technical field of waste heat recovery boiler energy conservation in copper smelting industry, in particular to a flash smelting furnace waste heat recovery boiler.
Background
The flash smelting waste heat recovery boiler is an intermediate link of the flash smelting process and plays an important role in the whole process system. The waste heat recovery boiler utilizes high-temperature flue gas discharged by the flash smelting furnace to produce steam, and plays roles in recycling, cooling and dedusting the flue gas temperature. Because the temperature of the high-temperature flue gas is As high As 1300-1400 ℃, the smoke dust rate is 6-10%, the smoke dust contains mineral particles and volatile elements Zn, pb, as and the like in the raw materials, the high-temperature flue gas enters a flue gas chamber of a boiler, a radiation section and a convection section and can abrade a heat exchange surface, the heat exchange surface has certain thickness reduction, and the potential safety hazard of pipe explosion exists. The smoke dust is in a molten state at high temperature, is extremely easy to adhere to the parts of a water-cooling wall, a slag baffle, a radiation hanging screen, a heat exchange tube bundle, an ash bucket and the like, and finally forms the condition that various metal compounds produce accumulated ash and slag at each part of a hearth. The accumulated ash and slag bonding not only affect the heat exchange effect of the heat exchange surface, but also cause great damage to lower equipment due to the fact that a large number of ash blocks are easy to fall off under the influence of vibration and gravity, and the two problems not only increase the overhaul cost of the boiler, but also seriously affect the normal operation of production.
The waste heat recovery boiler fully utilizes heat energy, has outstanding effects in energy conservation, emission reduction and carbon reduction, and has the problems of abrasion, dust accumulation and slag formation on the heat exchange surface of the boiler due to the characteristics of flash smelting smoke, so that the heat efficiency of the waste heat boiler is reduced, potential safety hazards exist, and the problems of abrasion resistance and dust accumulation and slag formation in the boiler are urgently needed to be solved at present.
Disclosure of Invention
Aiming at the situation that the heat exchange surface of the existing flash smelting waste heat boiler is not wear-resistant, and the slag trap is ash-deposited and slag-bonded to seriously have potential safety hazards, the utility model provides the waste heat recovery boiler designed according to the characteristics of high-temperature flue gas of the flash smelting waste heat boiler, which can improve the service life and safety of the device, improve the heat exchange effect, and improve the overall stability and energy-saving effect of the flash smelting process.
The utility model relates to a flash smelting waste heat recovery boiler applying a composite crystallization film, which comprises a flue gas chamber, wherein an air inlet flue is arranged at the left side of the flue gas chamber, and a tail flue is arranged at the right side of the flue gas chamber; the inner surface of the top wall of the flue gas chamber is provided with a ceiling water-cooling wall, the flue gas chamber is divided into a radiation chamber and a convection chamber from left to right, the radiation chamber is provided with a radiation screen hanging tube bundle, and the convection chamber is provided with a convection screen hanging tube bundle; the outside of the top wall of the flue gas chamber is provided with a steam drum, a water inlet header and a water return header, the steam drum is connected with the water inlet header and the water return header, and the water cooling wall, the radiation screen hanging tube bundles and the convection screen hanging tube bundles are respectively connected with the water inlet header and the water return header; the lower part of the radiation chamber is provided with an ash bucket; wherein, the surfaces of the air inlet flue, the inner wall of the flue gas chamber, the water-cooled wall of the ceiling, the radiant screen hanging tube bundle, the convection screen hanging tube bundle, the tail flue and the ash bucket are coated with a composite crystallization film.
Preferably, an ash blocking angle is arranged between the radiation chamber and the convection chamber, the ash blocking angle extends upwards from the lower left to the upper right, and the ash blocking angle is higher than the lowest end of the radiation screen hanging tube bundle.
In particular, the refractory materials used for the gas inlet flue and the flue gas chamber furnace wall are one or more of high-alumina bricks, magnesia-alumina bricks, corundum bricks and high-alumina refractory castable. The refractory bricks of the air inlet flue and the furnace wall of the flue gas chamber apply a special composite crystallization film for the furnace lining.
Preferably, the wear-resistant and coking-resistant composite crystallization film is applied to the ceiling water-cooled wall, the radiation screen hanging tube bundle and the convection screen hanging tube bundle.
Preferably, the tail flue, the ash bucket and the ash blocking angle are made of common carbon steel, and the corrosion-resistant and ash-deposition-resistant composite crystallization film is applied to the surfaces of the tail flue, the ash bucket and the ash blocking angle.
The special composite crystallization film for the furnace lining, the wear-resistant coking-resistant composite crystallization film and the corrosion-resistant dust-deposition-resistant composite crystallization film have the characteristics of higher wear resistance, corrosion resistance, high strength and low surface energy compared with the metal material, and the three composite crystallization films have important points for performance design under different working conditions.
Preferably, the thickness of the special composite crystallization film for the furnace lining of the refractory bricks of the air inlet flue and the furnace wall surface of the flue gas chamber is 100-200 mu m. The thickness of the composite crystallization film applied to the water cooling wall of the radiation chamber, the radiation screen hanging tube bundle, the convection screen hanging tube bundle, the tail flue, the ash bucket and the ash blocking angle is 60-100 mu m. Each composite crystalline film has uniform appearance, and no cracks, chipping, foaming, coarse particles, spherical spraying, uneven surface, air holes or bare spots on the substrate.
Compared with the prior equipment, the waste heat recovery boiler has the following advantages:
1. the slag blocking plate at the front part of the radiation screen hanging tube bundle is canceled, and the slag blocking plate at the front part of the convection screen hanging tube bundle is canceled. The existing equipment utilizes the slag baffle to block most of particles and ash particles in the flue gas, the particles and ash particles can be bonded into blocks at the slag baffle at high temperature, and the blocks can fall down to affect the safety of the device after the weight of the equipment reaches a certain degree. The utility model eliminates the slag baffle plate and solves the slag baffle problem by utilizing the characteristics of lower surface energy and strong wear resistance of the composite crystalline film. Firstly, the surfaces of the tube bundles are not polluted, coked, deposited and scaled at high temperature, so that particles and ash particles in a molten or semi-molten state are free of falling feet and are settled into an ash bucket along with the reduction of the temperature of flue gas. And secondly, the composite crystalline film has the characteristics of high strength and high toughness, and the wear resistance is more than 8 times of that of common metal, so that the composite crystalline film can resist cutting wear at different angles. Therefore, the tube bundle to which the composite crystallization film is applied can function as a slag trap.
2. The refractory brick of the air inlet flue and the furnace wall of the flue gas chamber apply the special composite crystalline film of the furnace lining, firstly, the reflectivity of the refractory material can be improved, and the heat loss caused by heat absorption of the furnace wall can be reduced. And secondly, the special composite crystalline film for the furnace lining can play a role in packaging the refractory material, so that dust particles in smoke are additionally increased due to peeling and slag removal of the refractory material. Finally, hydration and pulverization of the refractory material can be prevented during start-up and shut-down of the furnace, further protecting the refractory material and prolonging the service life.
3. The dust blocking angle structure is designed between the radiation hanging screen and the convection hanging screen, the dust blocking angle is higher than the lowest point of the radiation hanging screen, the flue gas does not have a direct current channel in the flowing process, the dust blocking angle greatly improves the effect of blocking the particulate dust particles, and more particulate dust particles are settled into the dust hopper.
4. The tail gas flue uses carbon steel with a composite crystallization film to replace the original stainless steel material, so that the material cost of the device can be reduced, and the effects of preventing the metal material from rusting, scaling, resisting acid and alkali corrosion and the like can be achieved. The composite crystalline film is made of nano inorganic material, has the characteristics of compact structure and stable chemical property, has a texture similar to ceramic after baking film formation, and cannot be penetrated by corrosive elements without reacting with the ceramic.
Drawings
Fig. 1 is a schematic front view of a flash smelting waste heat recovery boiler according to the present utility model.
Fig. 2 is a schematic side view of a flash smelting waste heat recovery boiler structure according to the present utility model.
Fig. 3 is a schematic diagram of the steam flow direction and the flue gas flow direction of a flash smelting waste heat recovery boiler according to the present utility model.
Wherein each reference numeral represents:
1-smoke chamber, 2-air inlet flue, 3-tail flue, 4-radiation chamber, 5-convection chamber, 6-radiation screen hanging tube bundle, 7-convection screen hanging tube bundle, 8-steam drum, 9-ceiling water-cooled wall, 10-water inlet header, 11-backwater header, 12-ash bucket and 13-ash blocking angle.
Detailed Description
The utility model will be further described with reference to the drawings and examples. It will be appreciated by those skilled in the art that the embodiments described below are merely illustrative of the present utility model and are not intended to be limiting in any way.
Referring to fig. 1-2, the flash smelting waste heat recovery boiler according to the present utility model includes a flue gas chamber 1, an air inlet flue 2 is provided at the left side of the flue gas chamber 1, and a tail flue 3 is provided at the right side of the flue gas chamber 1. The inner surface of the top wall of the flue gas chamber 1 is provided with a ceiling water-cooling wall 9. The flue gas chamber 1 is divided into a radiation chamber 4 and a convection chamber 5 from left to right according to the flue gas flow direction, the radiation chamber 4 is provided with a radiation screen hanging tube bundle 6, and the convection chamber 5 is provided with a convection screen hanging tube bundle 7. The outside of the top wall of the flue gas chamber 1 is provided with a steam drum 8, a water inlet header 10 and a water return header 11. The steam drum 8 is connected with a water inlet header 10 and a water return header 11. The ceiling water-cooling wall 9, the radiation screen hanging tube bundle 6 and the convection screen hanging tube bundle 7 are respectively connected with the water inlet header 10 and the water return header 11. The lower part of the radiation chamber 4 is provided with an ash bucket 12. The ceiling water-cooling wall 9, the radiation screen hanging tube bundles 6 and the convection screen hanging tube bundles 7 are hollow heat exchange structures with water communicated with the inside, and the hanging directions of heat exchange tubes of the radiation screen hanging tube bundles 6 and the convection screen hanging tube bundles 7 are perpendicular to the flow direction of the flue gas, so that the heat exchange with the flue gas is fully performed.
In particular, an ash blocking angle 13 is arranged between the radiation chamber 4 and the convection chamber 5, the ash blocking angle 13 extends upwards from the lower left to the upper right, and the ash blocking angle 13 is higher than the lowest end of the radiation screen hanging tube bundle 6. The ash blocking angle 13 is arranged so that the flue gas does not form a channel from the lower part of the radiation chamber 4 to the convection chamber 6 in the flowing process, and the ash blocking angle 13 can greatly improve the effect of blocking the particulate ash particles, and more particulate ash particles are settled into the ash bucket 12.
In the concrete case, the furnace walls of the air inlet flue 2 and the flue gas chamber 1 are built by adopting refractory materials, and the refractory materials are one or more of high-alumina bricks, magnesia-alumina bricks, corundum bricks and high-alumina refractory castable materials. The tail flue 3, the ash bucket 12 and the ash blocking angle 13 are made of common carbon steel. The surfaces of the air inlet flue 2, the inner wall of the flue gas chamber 1, the ceiling water-cooled wall 9, the radiation screen hanging tube bundle 6, the convection screen hanging tube bundle 7, the tail flue 3, the ash bucket 12 and the ash blocking angle 13 are all coated with composite crystallization films. Wherein, the surfaces of the refractory bricks of the air inlet flue 2 and the furnace wall of the flue gas chamber 1 are applied with special composite crystalline films for furnace lining. The outer surfaces of the ceiling water-cooling wall 9, the radiation screen hanging tube bundles 6 and the convection screen hanging tube bundles 7 are provided with wear-resistant and coking-resistant composite crystalline films. The surfaces of the tail flue 3, the ash bucket 12 and the ash blocking angle 13 are provided with corrosion-resistant and ash deposition-resistant composite crystallization films. The composite crystalline film is produced by Beijing Xiko energy-saving and environment-friendly technology Co. The thickness of the composite crystallization film applied to the inner surfaces of the air inlet flue 2 and the flue gas chamber 1 is 100-200 mu m; the thickness of the composite crystallization film applied by the ceiling water-cooling wall 9, the radiation screen-hanging tube bundle 6, the convection screen-hanging tube bundle 7, the tail flue 3, the ash bucket 12 and the ash blocking angle 13 is 60-100 mu m. The composite crystalline film is made of nano inorganic material, has the characteristics of compact structure and stable chemical property, has a texture similar to ceramic after baking film formation, and cannot be penetrated by corrosive elements without reacting with the ceramic. The application of the composite crystallization film protects the heat exchange surface from abrasion and corrosion on one hand and ensures the production safety. On the other hand, the high-efficiency heat exchange performance of the heat exchange surface is ensured, and the application effects of energy conservation, emission reduction, synergy and yield improvement of the device can be achieved.
Referring to fig. 3, in the working process of the flash smelting waste heat recovery boiler according to the utility model, the flue gas flow is that the flue gas enters the boiler from the air inlet flue 2, sequentially passes through the ceiling water-cooling wall 9, the radiation screen-hanging tube bundle 6, the ash blocking angle 13, the convection screen-hanging tube bundle 7 and the tail flue 3, and finally is discharged out of the boiler. The particle dust in the flue gas is mainly deposited into the ash bucket 12 under the action of the radiation screen hanging tube bundle 6 and the ash blocking angle 13. The steam-water flow is that water enters a steam drum 8 from a water inlet pipe, then enters a water inlet header 10 and flows into a ceiling water-cooling wall 9, a radiation screen-hanging tube bundle 6 and a convection screen-hanging tube bundle 7 respectively; after saturated steam is generated in the ceiling water-cooling wall 9, the radiation screen hanging tube bundles 6 and the convection screen hanging tube bundles 7, the saturated steam rises into the backwater header 11 and returns to the steam drum 8, and finally the steam is discharged from the steam drum 8 for grid connection.
The foregoing description is only illustrative of the preferred embodiments of the present utility model, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (4)
1. The flash smelting waste heat recovery boiler using the composite crystallization film is characterized by comprising a flue gas chamber (1), wherein an air inlet flue (2) is arranged on the left side of the flue gas chamber (1), and a tail flue (3) is arranged on the right side of the flue gas chamber (1); the inner surface of the top wall of the flue gas chamber (1) is provided with a ceiling water-cooling wall (9), the flue gas chamber (1) is divided into a radiation chamber (4) and a convection chamber (5) from left to right, the radiation chamber (4) is provided with a radiation screen hanging tube bundle (6), and the convection chamber (5) is provided with a convection screen hanging tube bundle (7); the outside of the top wall of the flue gas chamber (1) is provided with a steam drum (8), a water inlet header (10) and a water return header (11), the steam drum (8) is connected with the water inlet header (10) and the water return header (11), and a ceiling water-cooling wall (9), a radiation screen tube bundle (6) and a convection screen tube bundle (7) are respectively connected with the water inlet header (10) and the water return header (11); an ash bucket (12) is arranged at the lower part of the radiation chamber (4); the surfaces of the air inlet flue (2), the inner wall of the flue gas chamber (1), the ceiling water-cooled wall (9), the radiation screen hanging tube bundle (6), the convection screen hanging tube bundle (7), the tail flue (3) and the ash bucket (12) are coated with composite crystalline films.
2. A flash smelting waste heat recovery boiler using a composite crystalline film according to claim 1, characterized in that a dust blocking angle (13) is arranged between the radiation chamber (4) and the convection chamber (5), the dust blocking angle (13) extends upwards from the lower left to the upper right, and the height of the dust blocking angle (13) is higher than the lowest end of the radiation screen hanging tube bundle (6).
3. The flash smelting waste heat recovery boiler using the composite crystallization film according to claim 1, wherein the refractory materials used for the gas inlet flue (2) and the flue gas chamber (1) furnace wall are one or more of high-alumina bricks, magnesia-alumina bricks and high-alumina refractory castable.
4. A flash smelting waste heat recovery boiler using a composite crystalline film according to claim 1, wherein the thickness of the composite crystalline film applied to the inner surfaces of the air inlet flue (2) and flue gas chamber (1) is 100-200 μm; the thickness of the composite crystallization film applied by the ceiling water-cooling wall (9), the radiation screen hanging tube bundle (6), the convection screen hanging tube bundle (7), the tail flue (3) and the ash bucket (12) is 60-100 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321634562.2U CN220270102U (en) | 2023-06-26 | 2023-06-26 | Flash smelting waste heat recovery boiler using composite crystallization film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321634562.2U CN220270102U (en) | 2023-06-26 | 2023-06-26 | Flash smelting waste heat recovery boiler using composite crystallization film |
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| Publication Number | Publication Date |
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| CN220270102U true CN220270102U (en) | 2023-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321634562.2U Active CN220270102U (en) | 2023-06-26 | 2023-06-26 | Flash smelting waste heat recovery boiler using composite crystallization film |
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| Country | Link |
|---|---|
| CN (1) | CN220270102U (en) |
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2023
- 2023-06-26 CN CN202321634562.2U patent/CN220270102U/en active Active
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