CN220834752U - Novel deep purification device suitable for urea prilling tower tail gas - Google Patents
Novel deep purification device suitable for urea prilling tower tail gas Download PDFInfo
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- CN220834752U CN220834752U CN202322501262.3U CN202322501262U CN220834752U CN 220834752 U CN220834752 U CN 220834752U CN 202322501262 U CN202322501262 U CN 202322501262U CN 220834752 U CN220834752 U CN 220834752U
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000004202 carbamide Substances 0.000 title claims abstract description 49
- 238000000746 purification Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 162
- 239000007788 liquid Substances 0.000 claims description 70
- 239000002699 waste material Substances 0.000 claims description 60
- 239000007921 spray Substances 0.000 claims description 24
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 10
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims 3
- 230000003020 moisturizing effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 36
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 34
- 239000000428 dust Substances 0.000 abstract description 24
- 229910021529 ammonia Inorganic materials 0.000 abstract description 17
- 239000002912 waste gas Substances 0.000 abstract description 17
- 238000003287 bathing Methods 0.000 abstract description 6
- 239000002245 particle Substances 0.000 description 12
- 238000005406 washing Methods 0.000 description 8
- 210000003746 feather Anatomy 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The application relates to the technical field of urea prilling towers, and discloses a novel deep purification device suitable for tail gas of a urea prilling tower, which comprises a fixed ring, a base and an annular plate, wherein an annular washer is arranged at the bottom end of the fixed ring, the annular washer comprises a second water bath silk screen and a first water bath silk screen, the top ends of the second water bath silk screen and the first water bath silk screen are welded with the bottom end of the fixed ring, the second water bath silk screen and the first water bath silk screen are welded with the top end of the base, and the second water bath silk screen is positioned in the first water bath silk screen. This scheme is after the waste gas is discharged from urea prilling tower body through the shutter, can be in proper order through the one-level water film that one-level water bath silk screen formed and the second grade water film that second grade water bath silk screen formed on the net to and a plurality of plasma defroster, one-level water film and second grade water film wash urea dust and ammonia in the gas in the waste gas, and tail gas dust and ammonia after the doublestage bathing then reach standard.
Description
Technical Field
The application relates to the technical field of urea prilling towers, in particular to a novel deep purification device suitable for tail gas of a urea prilling tower.
Background
The urea prilling tower sprays liquid urea into liquid particles, then the liquid urea is cooled into solid particles through air, a large amount of air flows from bottom to top in the cooling process and is discharged from the tower top, the discharged air has the solid particles and trace ammonia, visual and olfactory discomfort can be brought, at present, the tail gas treatment of the urea prilling tower is mostly a filling type water washing process (the cleaning solution urea contains inner 4% (wt). The tail gas urea dust after treatment is 100mgm ammonia: 30mgm, the tailing is serious, the exhaust resistance of the prilling tower is large, the temperature rise of urea particles is 10 ℃, the temperature of the prilling tower is 71 ℃ in summer, the load of the prilling tower is about 50 tons, the electric consumption is 1.5Kw/h.Ur, the investment is about 180 ten thousand yuan, the problems are that the treated tail gas urea dust and ammonia are not up to standard, white tailing is visible to naked eyes, the temperature rise of urea particles is 10 ℃, the operation electric consumption and maintenance cost are low), the forced ventilation filling type water washing process (the washing liquid urea contains 5% (wt) & gt, the tail gas urea dust after treatment is 50mgm of ammonia 30mgm, the tailing is serious, the prilling tower resistance is large, the urea particle temperature rise is 20 ℃, the load of the prilling tower is about 70 tons, the electric consumption of the tail gas treatment is 3.5Kwh.Ur, the investment is about 700 ten thousand yuan, the problems are that the treated ammonia, the urea dust and ammonia are not up to standard, the treated tail gas is visible to naked eyes, the temperature rise of the urea particles after treatment is 20 ℃ and the operation electric consumption is high, the maintenance cost is high, the water bath network water is high, the urea dust content is 20% (the tail gas dust after the urea dust is 20mgm, the temperature of the urea dust is 20 mgm), the tail gas dust is 20mgm, the temperature of the urea particle is 20mgm, the tail gas dust is 20mgm, the exhaust resistance is serious, the temperature of the urea particle is 20 ℃ and the tail dust is 20 g, the temperature and the temperature is increased and the prilling tower is 20 g, the temperature and the temperature is the temperature and the prilling tower is high. The temperature of the granulation tower is 71 ℃ when the granulation tower is taken out in summer. The top of the granulator tower was loaded with about 455 tons. The tail gas treatment increases the power consumption by 1.5KwhUr. The investment is about 220 ten thousand yuan, and the problem is that the treated tail gas, urea dust and ammonia reach the standard. The treated gas was visually observed as a white smear. The temperature of the plain particles is increased by 10C), and the bag dust removal process (the gas dust content after the treatment reaches the national emission standard). Ammonia in the exhaust gas cannot be recovered and exceeds the standard. Tail gas after treatment has no tailing phenomenon. The resistance of the exhaust gas of the prilling tower is high, and the temperature of urea particles discharged from the prilling tower in summer is up to 95 ℃. The load on the top of the granulator tower was increased by about 80 tons. The tail gas treatment increases the power consumption by 5.5Kwh. The investment is about 1300 ten thousand yuan, and the problem is that the treated tail gas and urea dust reach the standard and the ammonia does not reach the standard. The treated gas was visually clear of white streaking. The urea particle temperature was increased by 20 ℃. High investment, high power consumption and high maintenance cost), the white feather phenomenon cannot be effectively solved by the four purification treatment technologies for the tail gas of the urea prilling tower, and the white feather removing method in the traditional technology has a heating method and a forced ventilation method, but has respective technical defects.
Disclosure of utility model
In order to solve the problem that the white feather phenomenon cannot be effectively solved by the filling type water washing process, the forced ventilation filling type water washing process, the water bath net water washing process and the cloth bag dust removing process, the application provides a novel deep purification device suitable for tail gas of a urea prilling tower.
The application provides a novel deep purification device suitable for tail gas of a urea prilling tower, which adopts the following technical scheme:
The utility model provides a novel deep purification device suitable for urea prilling tower tail gas, includes solid fixed ring, base and annular plate, the annular scrubber is installed to gu the bottom of solid fixed ring, annular scrubber includes second grade water bath silk screen and one-level water bath silk screen, the top of second grade water bath silk screen and one-level water bath silk screen all welds with the bottom of solid fixed ring, second grade water bath silk screen and one-level water bath silk screen all welds with the top of base, the second grade water bath silk screen is located the inside of one-level water bath silk screen;
The edge of the top end of the fixed ring is provided with a first annular water collecting tank and a second annular water collecting tank, the annular plate is welded at the top end of the fixed ring, the bottom end of the first annular water collecting tank is communicated with a plurality of first spray heads, the bottom end of the second annular water collecting tank is communicated with a plurality of second spray heads, one end of the top of the annular plate is fixedly penetrated with a water injection pipe, the water injection pipe is communicated with the second annular water collecting tank, the edge of the bottom end of the base is provided with an annular waste liquid tank, and the middle part of the top end of the base is provided with a water supplementing assembly for conveying waste liquid in the annular waste liquid tank into the first annular water collecting tank;
the top of solid fixed ring is provided with the supporting ring, four corners of supporting ring bottom all weld the support frame, four the support frame all welds with the annular plate, a plurality of plasma defroster is installed to the bottom of supporting ring, and this a plurality of plasma defroster is annular distribution.
Preferably, the water replenishing assembly comprises a circulating water pump, an elbow pipe and a guide pipe, wherein the circulating water pump is fixedly arranged in the middle of the top end of the base, one end of the elbow pipe is communicated with the annular waste liquid tank, the other end of the elbow pipe is communicated with a water pumping port of the circulating water pump, one end of the guide pipe is communicated with the first annular water collecting tank, and the other end of the guide pipe is communicated with a water outlet of the circulating water pump.
Preferably, a through hole is formed in the middle of the inner side wall of the annular waste liquid tank, a waste liquid discharge pipe is fixedly penetrated in the through hole, and the waste liquid discharge pipe is communicated with the annular waste liquid tank.
Preferably, the intervals between every two of the first spray heads are the same, the first spray heads are distributed in a circular ring shape, the intervals between every two of the second spray heads are the same, and the second spray heads are distributed in a circular ring shape.
In summary, the application has the following beneficial technical effects: after the waste gas is discharged from the urea prilling tower body through the shutter, a first-stage water film and a second-stage water film formed on the second-stage water bath silk screen are sequentially formed through the first-stage water bath silk screen, and a plurality of plasma demisters, the first-stage water film and the second-stage water film wash urea dust and ammonia in the gas in the waste gas, the tail gas dust and ammonia after two-stage bathing reach standards, and the waste gas after two-stage bathing can carry a large amount of water vapor to form white feather due to heat exchange, and at the moment, the plasma demisters can effectively coagulate liquid drops in the waste gas and fall into an annular waste liquid tank to participate in circulation or emission, so that the white feather phenomenon is solved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the application embodiment.
Fig. 2 is a schematic cross-sectional structure of an embodiment of the application.
Fig. 3 is a schematic diagram of a split structure of an embodiment of the application.
FIG. 4 is a schematic view of the mounting effect of a support frame, a plasma mist eliminator, and a support ring in an embodiment of the present application.
Reference numerals illustrate: 1. an annular scrubber; 21. a fixing ring; 22. a base; 23. a second-stage water bath silk screen; 24. a primary water bath silk screen; 25. a first annular water collection sump; 26. a second annular water collection sump; 27. an annular plate; 28. a first showerhead; 29. a second showerhead; 3. a water injection pipe; 4. an annular waste liquid tank; 5. a water replenishing assembly; 51. a circulating water pump; 52. bending the pipe; 53. a conduit; 6. a waste liquid discharge pipe; 71. a support frame; 72. a plasma mist eliminator; 73. and a support ring.
Detailed Description
The application is described in further detail below with reference to fig. 1-4.
The embodiment of the application discloses a novel deep purification device suitable for tail gas of a urea prilling tower, which comprises a fixed ring 21, a base 22 and an annular plate 27, wherein the bottom end of the fixed ring 21 is provided with an annular washer 1, the annular washer 1 comprises a second water bath silk screen 23 and a first water bath silk screen 24, the top ends of the second water bath silk screen 23 and the first water bath silk screen 24 are welded with the bottom end of the fixed ring 21, the second water bath silk screen 23 and the first water bath silk screen 24 are welded with the top end of the base 22, and the second water bath silk screen 23 is positioned in the first water bath silk screen 24;
referring to fig. 2 and 4, a first annular water collecting tank 25 and a second annular water collecting tank 26 are formed at the edge of the top end of the fixed ring 21, an annular plate 27 is welded at the top end of the fixed ring 21, the annular plate 27 can be used for sealing the top end of the first annular water collecting tank 25 and the top end of the second annular water collecting tank 26, a plurality of first spray heads 28 are communicated with the bottom end of the first annular water collecting tank 25, a plurality of second spray heads 29 are communicated with the bottom end of the second annular water collecting tank 26, a water injection pipe 3 is fixedly penetrated at one end of the top of the annular plate 27, and the water injection pipe 3 is communicated with the second annular water collecting tank 26, the water injection pipe 3 can be used for communicating the external water suction pump with the second annular water collecting tank 26, the suction pump provided outside in this way can deliver clean water to the inside of the second annular water collection tank 26 through the water injection pipe 3 after the clean water is extracted, then clean water in the second annular water collecting tank 26 is sprayed onto the second water bath silk screen 23 through a plurality of second spray heads 29 to form a second water film, an annular waste liquid tank 4 is arranged at the edge of the bottom end of the base 22, the annular waste liquid tank 4 can be used for collecting waste liquid, a water supplementing component 5 for conveying the waste liquid in the annular waste liquid tank 4 into the first annular water collecting tank 25 is arranged in the middle of the top end of the base 22, the waste liquid conveyed into the first annular water collecting tank 25 by the water supplementing component 5 can be sprayed onto the first water bath silk screen 24 through a plurality of first spray heads 28 to form a first water film, and the waste gas is discharged from the urea prilling tower body through the shutter and then sequentially passes through a primary water film formed by the primary water bath silk screen 24 and a secondary water film formed on the secondary water bath silk screen 23, thereby washing urea dust and ammonia in the gas in the waste gas, and reaching the standard of the tail gas dust and ammonia after two-stage bath;
Referring to fig. 2 and 4, the top of the fixing ring 21 is provided with a supporting ring 73, four corners at the bottom end of the supporting ring 73 are welded with supporting frames 71, the four supporting frames 71 are welded with the annular plate 27, a plurality of plasma demisters 72 are installed at the bottom end of the supporting ring 73, the plurality of plasma demisters 72 are annularly distributed, a great amount of water vapor can be carried by waste gas after two-stage bathing to form white feather due to heat exchange, and the plasma demisters 72 can effectively coagulate liquid drops in the waste gas and fall into the annular waste liquid tank 4 to participate in circulation or discharge, so that the white feather phenomenon is solved.
Referring to fig. 2, the water replenishing assembly 5 is composed of a circulating water pump 51, an elbow 52 and a conduit 53, the circulating water pump 51 is fixedly installed in the middle of the top end of the base 22, one end of the elbow 52 is communicated with the annular waste liquid tank 4, the other end of the elbow 52 is communicated with a water pumping port of the circulating water pump 51, one end of the conduit 53 is communicated with the first annular water collecting tank 25, the other end of the conduit 53 is communicated with a water outlet of the circulating water pump 51, the circulating water pump 51 can pump waste liquid in the annular waste liquid tank 4 through the elbow 52 and liquid drops condensed by the plasma demister 72 and falling into the annular waste liquid tank 4, the waste liquid is pumped out and discharged into the first annular water collecting tank 25 through the conduit 53, finally, the waste gas is sprayed onto the first-stage water bath screen 24 through a plurality of first spray heads 28 to form a first-stage water film, and the waste gas is subjected to a first-stage bath, and meanwhile the waste liquid is fully utilized.
Referring to fig. 2 and 3, a through hole is formed in the middle of the inner side wall of the annular waste liquid tank 4, a waste liquid discharge pipe 6 is fixedly penetrated in the through hole, the waste liquid discharge pipe 6 is communicated with the annular waste liquid tank 4, and after the other end of the waste liquid discharge pipe 6 is communicated with peripheral waste liquid collecting and treating equipment, redundant waste liquid in the annular waste liquid tank 4 is discharged to the peripheral collecting and treating equipment through the waste liquid discharge pipe 6 for treatment, so that the waste liquid is prevented from overflowing from the annular waste liquid tank 4, and meanwhile, the liquid level of the waste liquid in the annular waste liquid tank 4 can be continuously maintained.
Referring to fig. 1, 2 and 3, the intervals between the first spray headers 28 are the same, and the first spray headers 28 are distributed in a circular ring shape, so that the waste liquid in the first annular water collecting tank 25 can be uniformly sprayed on the first water bath screen 24 to form a first water film, the intervals between the second spray headers 29 are the same, and the second spray headers 29 are distributed in a circular ring shape, so that the clean water in the second annular water collecting tank 26 can be uniformly sprayed on the second water bath screen 23 to form a second water film.
The embodiment of the application provides a novel deep purification device suitable for tail gas of a urea prilling tower, which is implemented by the following principle: when in use, the device is arranged on the top of the urea prilling tower, the waste liquid discharge pipe 6 is fixedly penetrated through the urea prilling tower and the base 22 and is communicated with the annular waste liquid tank 4, then the clean water can be conveyed into the second annular water collecting tank 26 through the water injection pipe 3 after the clean water is extracted by utilizing the external water pump, then the clean water in the second annular water collecting tank 26 is sprayed onto the second water bath silk screen 23 through the plurality of second spray heads 29 to form a second water film, meanwhile, the redundant water flows down to the annular waste liquid tank 4 along the inner side wall of the second water bath silk screen 23, the circulating water pump 51 can pump the waste liquid in the annular waste liquid tank 4 through the bent pipe 52 and the liquid drops condensed and dropped into the annular waste liquid tank 4 by the plasma demister 72, and is discharged into the first annular water collecting tank 25 through the guide pipe 53, finally, the waste gas is sprayed onto the first water bath silk screen 24 through the first spray heads 28 to form a first water film, after being discharged from the urea prilling tower body through the shutter, the waste gas sequentially passes through the first water film formed by the first water bath silk screen 24 and the second water film formed by the second water bath silk screen 23, thereby washing urea dust and ammonia in the gas in the waste gas, the tail gas dust and ammonia after two-stage bathing reach standards, the waste gas after two-stage bathing can carry a large amount of water vapor to form white plumes due to heat exchange, at the moment, the plasma demister 72 can effectively coagulate liquid drops in the waste gas and fall into the annular waste liquid tank 4 to participate in circulation or discharge, thereby solving the white plumes phenomenon, and simultaneously, redundant waste liquid in the annular waste liquid tank 4 can be discharged into peripheral collecting and treating equipment through the waste liquid discharge pipe 6 to treat, so as to prevent the waste liquid from overflowing from the annular waste liquid tank 4, the level of the waste liquid in the annular waste liquid tank 4 can be maintained continuously.
The last points to be described are: first, in the description of the present application, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;
secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;
finally: the foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.
Claims (4)
1. The utility model provides a novel deep purification device suitable for urea prilling tower tail gas, includes solid fixed ring (21), base (22) and annular plate (27), its characterized in that, annular scrubber (1) is installed to the bottom of solid fixed ring (21), annular scrubber (1) include second grade water bath silk screen (23) and one-level water bath silk screen (24), the top of second grade water bath silk screen (23) and one-level water bath silk screen (24) all with the bottom welding of solid fixed ring (21), second grade water bath silk screen (23) and one-level water bath silk screen (24) all with the top welding of base (22), second grade water bath silk screen (23) are located the inside of one-level water bath silk screen (24);
The edge at the top end of the fixed ring (21) is provided with a first annular water collecting tank (25) and a second annular water collecting tank (26), the annular plate (27) is welded at the top end of the fixed ring (21), the bottom end of the first annular water collecting tank (25) is communicated with a plurality of first spray heads (28), the bottom end of the second annular water collecting tank (26) is communicated with a plurality of second spray heads (29), one end of the top of the annular plate (27) is fixedly penetrated with a water injection pipe (3), the water injection pipe (3) is communicated with the second annular water collecting tank (26), the edge at the bottom end of the base (22) is provided with an annular waste liquid tank (4), and the middle part of the top end of the base (22) is provided with a water supplementing assembly (5) for conveying waste liquid in the annular waste liquid tank (4) into the first annular water collecting tank (25);
the top of solid fixed ring (21) is provided with supporting ring (73), four corners of supporting ring (73) bottom have all welded support frame (71), four support frame (71) all with annular plate (27) welding, a plurality of plasma defroster (72) are installed to the bottom of supporting ring (73), and these a plurality of plasma defroster (72) are annular distribution.
2. The novel deep purification device suitable for the tail gas of the urea prilling tower according to claim 1, wherein: moisturizing subassembly (5) are constituteed by circulating water pump (51), return bend (52) and pipe (53), circulating water pump (51) fixed mounting is in the middle part on base (22) top, the one end and the annular waste liquid groove (4) of return bend (52) communicate, the other end and the water pumping mouth intercommunication of circulating water pump (51) of return bend (52), the one end and the first annular water catch bowl (25) intercommunication of pipe (53), the other end and the delivery port intercommunication of circulating water pump (51) of pipe (53).
3. The novel deep purification device suitable for the tail gas of the urea prilling tower according to claim 1, wherein: the middle part of annular waste liquid groove (4) inside wall has seted up the through-hole, the inside of through-hole is fixed to be run through has waste liquid discharge pipe (6), and this waste liquid discharge pipe (6) and annular waste liquid groove (4) intercommunication.
4. The novel deep purification device suitable for the tail gas of the urea prilling tower according to claim 1, wherein: the intervals between every two of the first spray heads (28) are the same, the first spray heads (28) are distributed in a circular ring shape, the intervals between every two of the second spray heads (29) are the same, and the second spray heads (29) are distributed in a circular ring shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322501262.3U CN220834752U (en) | 2023-09-14 | 2023-09-14 | Novel deep purification device suitable for urea prilling tower tail gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322501262.3U CN220834752U (en) | 2023-09-14 | 2023-09-14 | Novel deep purification device suitable for urea prilling tower tail gas |
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| Publication Number | Publication Date |
|---|---|
| CN220834752U true CN220834752U (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322501262.3U Active CN220834752U (en) | 2023-09-14 | 2023-09-14 | Novel deep purification device suitable for urea prilling tower tail gas |
Country Status (1)
| Country | Link |
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| CN (1) | CN220834752U (en) |
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2023
- 2023-09-14 CN CN202322501262.3U patent/CN220834752U/en active Active
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