CN213803664U - Efficient ammonium sulfate saturator - Google Patents
Efficient ammonium sulfate saturator Download PDFInfo
- Publication number
- CN213803664U CN213803664U CN202022842147.9U CN202022842147U CN213803664U CN 213803664 U CN213803664 U CN 213803664U CN 202022842147 U CN202022842147 U CN 202022842147U CN 213803664 U CN213803664 U CN 213803664U
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- China
- Prior art keywords
- pipe
- box body
- sulfuric acid
- reaction cylinder
- air inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052921 ammonium sulfate Inorganic materials 0.000 title claims abstract description 25
- 235000011130 ammonium sulphate Nutrition 0.000 title claims abstract description 25
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 126
- 238000006243 chemical reaction Methods 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000005192 partition Methods 0.000 claims abstract description 18
- 239000007921 spray Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 235000011149 sulphuric acid Nutrition 0.000 abstract description 20
- 239000001117 sulphuric acid Substances 0.000 abstract description 20
- 239000003034 coal gas Substances 0.000 abstract description 18
- 238000006481 deamination reaction Methods 0.000 abstract description 11
- 230000009615 deamination Effects 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
A high-efficiency ammonium sulfate saturator comprises a box body, a reaction assembly, a first air outlet pipe, a partition plate, a sulfuric acid circulating pipe, a power device, a rotating shaft and a second air outlet pipe; the bottom of the box body is provided with an air inlet pipe; the gas inlet branch pipe is communicated with the gas inlet pipe and is connected with the bottom of the reaction cylinder; the reaction cylinder is arranged on the inner wall of the box body, and the top of the reaction cylinder is provided with a sulfuric acid pipe; the second supporting plate is arranged at the bottom of the first supporting plate; the liquid discharge pipe is arranged at the bottom of the reaction cylinder; the gas outlet branch pipe is arranged at the top of the reaction cylinder and is communicated with the first gas outlet pipe; the first air outlet pipe penetrates through the partition plate and extends into the upper part of the partition plate; the sulfuric acid circulating pipe is arranged on the box body; the power device is arranged on the outer wall of the box body; the rotating shaft is provided with a rotating blade; the second outlet duct sets up at the box top. The utility model discloses in, the deamination is effectual, and the deamination is efficient, has avoided the subsequent pipeline of sulphuric acid corrosion and equipment in the coal gas simultaneously, can collect recycle to sulphuric acid again.
Description
Technical Field
The utility model relates to an ammonium sulfate saturator technical field especially relates to an efficient ammonium sulfate saturator.
Background
The ammonium sulfate is the ammonium sulfate, it is the important chemical product raw materials, mainly used in the fields of chemical fertilizer, leather, medicine, textile, etc., the coal gas reprocessing is an important way to produce ammonium sulfate products, the application of the saturation technology of spray type among them, can improve the production level of the ammonium sulfate of coal chemical industry effectively, the principle is mainly to utilize the ammonia to produce ammonium sulfate with the neutralization reaction principle of sulfuric acid, the existing ammonium sulfate saturator is lower in efficiency in preparing ammonium sulfate, and the exhausted gas contains a small amount of sulfuric acid droplets, cause the erosion to subsequent pipeline and apparatus easily.
SUMMERY OF THE UTILITY MODEL
Objects of the invention
For solving the technical problem who exists among the background art, the utility model provides an efficient ammonium sulfate saturator, the deamination is effectual, sets up two sets of reaction unit spares, and the deamination is efficient, rotates the rotatory sulphuric acid liquid drop with in the coal gas of bucket simultaneously and collects again and recycles, has both avoided the sulphuric acid in the coal gas to corrode follow-up pipeline and equipment, can collect recycling to sulphuric acid again, has avoided a large amount of wastes of sulphuric acid.
(II) technical scheme
The utility model provides an efficient ammonium sulfate saturator, which comprises a box body, a reaction component, a first air outlet pipe, a clapboard, a sulfuric acid circulating pipe, a power device, a rotating shaft and a second air outlet pipe; the reaction assembly comprises an air inlet branch pipe, a reaction cylinder, a sulfuric acid pipe, a sulfuric acid pump, a sulfuric acid box, a first supporting plate, a second supporting plate, a liquid discharge pipe and an air outlet branch pipe;
the bottom of the box body is provided with a plurality of groups of supporting columns, the bottom of the box body is provided with an air inlet pipe, the air inlet pipe is provided with an air inlet valve, and the end part of the air inlet pipe extending into the box body is closed; the air inlet branch pipe is positioned in the box body and communicated with the air inlet pipe, the air inlet branch pipe is connected with the bottom of the reaction cylinder, and the air inlet branch pipe extends into the reaction cylinder; the reaction cylinder is vertically arranged on the inner wall of the box body, the upper end and the lower end of the reaction cylinder are sealed, the top of the reaction cylinder is provided with a sulfuric acid pipe, the sulfuric acid pipe penetrates through the box wall of the box body and extends out of the box body, and the sulfuric acid pipe is communicated with the sulfuric acid box through a sulfuric acid pump; the outer peripheral wall of the first supporting plate is attached to the inner peripheral wall of the reaction cylinder, and a first strip-shaped groove is formed in the lower end face of the first supporting plate; the second support plate is horizontally arranged at the bottom of the first support plate, a second strip-shaped groove opposite to the first strip-shaped groove is formed in the upper end face of the second support plate, a plurality of groups of vertical liquid outlet holes are formed in the bottom of the second strip-shaped groove, a plurality of groups of vertically opposite air outlet holes are formed in the first support plate and the second support plate, and the plurality of groups of air outlet holes are positioned on the periphery of the first strip-shaped groove; the liquid discharge pipe is arranged at the bottom of the reaction cylinder, penetrates through the wall of the box body and extends out of the box body; the gas outlet branch pipe is arranged at the top of the reaction cylinder, the gas outlet branch pipe is communicated with the inner cavity of the reaction cylinder, and the gas outlet end of the gas outlet branch pipe is communicated with the first gas outlet pipe; two groups of reaction components are arranged;
the first air outlet pipe penetrates through the partition plate and extends into the upper part of the partition plate; the baffle is horizontally arranged in the box body and positioned above the reaction cylinder, the baffle is provided with an annular groove, and the annular groove forms openings on the peripheral surface and the upper end surface of the baffle; the sulfuric acid circulating pipe is arranged on the tank body, the feeding end of the sulfuric acid circulating pipe is communicated with the annular groove, and the discharging end of the sulfuric acid circulating pipe is inserted into the sulfuric acid tank; the power device is arranged on the outer wall of the box body and is in transmission connection with the rotating shaft; the rotating shaft penetrates through the box wall of the box body and extends into the box body, the rotating shaft is horizontally arranged and is positioned above the partition plate, and vertical rotating blades are arranged on the rotating shaft; the second outlet duct sets up at the box top, sets up out the gas valve on the second outlet duct.
Preferably, the wall of the liquid outlet hole is provided with grid yarns.
Preferably, a vertical spray pipe is arranged at the top of the first support plate and communicated with the first strip-shaped groove, a spray head is arranged at the top of the spray pipe and is positioned right below the air inlet end of the air outlet branch pipe.
Preferably, the rotating blades are arranged in parallel in a plurality of groups on the rotating shaft.
Preferably, the top of the first air outlet pipe is provided with a guide pipe, the first air outlet pipe is communicated with the guide pipe, and the air outlet end of the guide pipe is far away from the second air outlet pipe.
Preferably, universal wheels are arranged at the bottoms of the supporting columns.
The above technical scheme of the utility model has following profitable technological effect: the deamination is effectual, sets up two sets of reaction assembly, and the deamination is efficient, and it is used to rotate the rotatory sulphuric acid liquid drop in with the coal gas and collect again simultaneously, has both avoided the sulphuric acid in the coal gas to corrode follow-up pipeline and equipment, can collect recycle to sulphuric acid again, has avoided a large amount of wastes of sulphuric acid.
Drawings
Fig. 1 is a schematic structural diagram of the efficient ammonium sulfate saturator provided by the present invention.
Fig. 2 is a sectional view of the efficient ammonium sulfate saturator according to the present invention.
Fig. 3 is an enlarged schematic diagram of the efficient ammonium sulfate saturator at the position B.
Reference numerals: 1. a box body; 2. a support pillar; 3. an air inlet pipe; 4. an intake valve; 5. an intake branch pipe; 6. a reaction cylinder; 7. a sulfuric acid pipe; 8. a sulfuric acid pump; 9. a sulfuric acid tank; 10. a first support plate; 11. a first bar-shaped groove; 12. a second support plate; 13. a second strip groove; 14. a liquid outlet hole; 15. a grid yarn; 16. an air outlet; 17. a nozzle; 18. a spray head; 19. a liquid discharge pipe; 20. an air outlet branch pipe; 21. a first air outlet pipe; 22. a partition plate; 23. an annular groove; 24. a sulfuric acid circulation pipe; 25. a power plant; 26. a rotating shaft; 27. rotating the blades; 28. a second air outlet pipe; 29. an air outlet valve; 30. a guide tube; 31. a universal wheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-3, the utility model provides a high-efficiency ammonium sulfate saturator, which comprises a box body 1, a reaction component, a first air outlet pipe 21, a baffle plate 22, a sulfuric acid circulating pipe 24, a power device 25, a rotating shaft 26 and a second air outlet pipe 28; the reaction assembly comprises an air inlet branch pipe 5, a reaction cylinder 6, a sulfuric acid pipe 7, a sulfuric acid pump 8, a sulfuric acid box 9, a first support plate 10, a second support plate 12, a liquid discharge pipe 19 and an air outlet branch pipe 20;
the bottom of the box body 1 is provided with a plurality of groups of supporting columns 2, the bottom of the box body 1 is provided with an air inlet pipe 3, the air inlet pipe 3 is provided with an air inlet valve 4, and the end part of the air inlet pipe 3 extending into the box body 1 is closed; the air inlet branch pipe 5 is positioned in the box body 1, the air inlet branch pipe 5 is communicated with the air inlet pipe 3, the air inlet branch pipe 5 is connected with the bottom of the reaction cylinder 6, and the air inlet branch pipe 5 extends into the reaction cylinder 6; the reaction cylinder 6 is vertically arranged on the inner wall of the box body 1, the upper end and the lower end of the reaction cylinder 6 are sealed, the top of the reaction cylinder 6 is provided with a sulfuric acid pipe 7, the sulfuric acid pipe 7 penetrates through the box wall of the box body 1 and extends out of the box body 1, and the sulfuric acid pipe 7 is communicated with a sulfuric acid box 9 through a sulfuric acid pump 8; the outer peripheral wall of the first support plate 10 is attached to the inner peripheral wall of the reaction cylinder 6, and a first strip-shaped groove 11 is formed in the lower end face of the first support plate 10; the second support plate 12 is horizontally arranged at the bottom of the first support plate 10, a second strip-shaped groove 13 opposite to the first strip-shaped groove 11 is formed in the upper end face of the second support plate 12, a plurality of groups of vertical liquid outlet holes 14 are formed in the bottom of the second strip-shaped groove 13, a plurality of groups of vertically opposite air outlet holes 16 are formed in the first support plate 10 and the second support plate 12, and the plurality of groups of air outlet holes 16 are positioned on the periphery of the first strip-shaped groove 11; the liquid discharge pipe 19 is arranged at the bottom of the reaction cylinder 6, and the liquid discharge pipe 19 penetrates through the wall of the box body 1 and extends out of the box body 1; the gas outlet branch pipe 20 is arranged at the top of the reaction cylinder 6, the gas outlet branch pipe 20 is communicated with the inner cavity of the reaction cylinder 6, and the gas outlet end of the gas outlet branch pipe 20 is communicated with the first gas outlet pipe 21; two groups of reaction components are arranged;
the first air outlet pipe 21 penetrates through the partition plate 22 and extends above the partition plate 22; the partition plate 22 is horizontally arranged in the box body 1, the partition plate 22 is positioned above the reaction cylinder 6, the partition plate 22 is provided with an annular groove 23, and the annular groove 23 forms openings on the peripheral surface and the upper end surface of the partition plate 22; the sulfuric acid circulating pipe 24 is arranged on the tank body 1, the feeding end of the sulfuric acid circulating pipe 24 is communicated with the annular groove 23, and the discharging end of the sulfuric acid circulating pipe 24 is inserted into the sulfuric acid tank 9; the power device 25 is arranged on the outer wall of the box body 1, and the power device 25 is in transmission connection with the rotating shaft 26; the rotating shaft 26 penetrates through the wall of the box body 1 and extends into the box body 1, the rotating shaft 26 is horizontally arranged, the rotating shaft 26 is positioned above the partition plate 22, and the rotating shaft 26 is provided with a vertical rotating blade 27; the second air outlet pipe 28 is arranged at the top of the box body 1, and an air outlet valve 29 is arranged on the second air outlet pipe 28.
The utility model discloses in, coal gas is from intake pipe 3 and inlet branch 5 get into in the reaction cylinder 6, go out the continuous low sulphuric acid of 14 downthehole sources in liquid hole, thereby react with the ammonia in the coal gas, the ammonium sulfate liquid that forms after being absorbed by sulphuric acid spray liquid flows from fluid-discharge tube 19, coal gas after the reaction gets into first outlet duct 21 from venthole 16 and outlet branch 20, get into baffle 22 top from first outlet duct 21 at last, power device 25 drives the continuous rotation of rotating vane 27 through axis of rotation 26, with the sulphuric acid droplet adhesion that contains in the coal gas to rotating vane 27, and through rotatory centrifugal force with on it gets rid of baffle 22, the sulphuric acid droplet finally assembles and is circulated in flowing into sulphuric acid case 9 by sulphuric acid circulating pipe 24 in ring channel 23 and uses, coal gas is finally from second outlet duct 28 discharge box 1. The utility model discloses in, the deamination is effectual, sets up two sets of reaction assembly, and the deamination is efficient, rotates the rotatory sulphuric acid liquid drop with in the coal gas of bucket 27 simultaneously and collects again and recycles, has both avoided the sulphuric acid in the coal gas to corrode follow-up pipeline and equipment, can collect recycles to sulphuric acid again, has avoided a large amount of wastes of sulphuric acid.
In an alternative embodiment, the wall of the liquid outlet hole 14 is provided with a grid yarn 15; the sulfuric acid is sprayed in a mist form, so that the contact area with the coal gas is increased, and the deamination effect is enhanced.
In an alternative embodiment, a vertical spray pipe 17 is arranged on the top of the first support plate 10, the spray pipe 17 is communicated with the first strip-shaped groove 11, a spray head 18 is arranged on the top of the spray pipe 17, and the spray head 18 is positioned right below the air inlet end of the air outlet branch pipe 20; the sulfuric acid is sprayed to the gas inlet end of the gas outlet branch pipe 20 to deaminate the coal gas again, so that the deamination effect is improved, the liquid sprayed from the spray head 18 flows down from the gas outlet hole 16, and the deamination reaction is carried out on the coal gas again in the flowing-down process.
In an alternative embodiment, the rotating blades 27 are arranged in parallel in a plurality of groups on the rotating shaft 26; the ability to adhere sulfuric acid droplets is improved.
In an alternative embodiment, a guide pipe 30 is arranged at the top of the first outlet pipe 21, the first outlet pipe 21 is communicated with the guide pipe 30, and the outlet end of the guide pipe 30 is far away from the second outlet pipe 28; the distance from the coal gas to the second gas outlet pipe 28 is increased, the possibility that the sulfuric acid liquid drops are adhered to the rotating blades 27 is increased, and the sulfuric acid liquid drops mixed in the coal gas are further reduced.
In an alternative embodiment, universal wheels 31 are arranged at the bottom of the supporting column 2; is convenient to move.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (6)
1. A high-efficiency ammonium sulfate saturator is characterized by comprising a box body (1), a reaction component, a first air outlet pipe (21), a partition plate (22), a sulfuric acid circulating pipe (24), a power device (25), a rotating shaft (26) and a second air outlet pipe (28); the reaction assembly comprises an air inlet branch pipe (5), a reaction cylinder (6), a sulfuric acid pipe (7), a sulfuric acid pump (8), a sulfuric acid box (9), a first supporting plate (10), a second supporting plate (12), a liquid discharge pipe (19) and an air outlet branch pipe (20);
the bottom of the box body (1) is provided with a plurality of groups of supporting columns (2), the bottom of the box body (1) is provided with an air inlet pipe (3), the air inlet pipe (3) is provided with an air inlet valve (4), and the end part of the air inlet pipe (3) extending into the box body (1) is closed; the air inlet branch pipe (5) is positioned in the box body (1), the air inlet branch pipe (5) is communicated with the air inlet pipe (3), the air inlet branch pipe (5) is connected with the bottom of the reaction cylinder (6), and the air inlet branch pipe (5) extends into the reaction cylinder (6); the reaction cylinder (6) is vertically arranged on the inner wall of the box body (1), the upper end and the lower end of the reaction cylinder (6) are sealed, the top of the reaction cylinder (6) is provided with a sulfuric acid pipe (7), the sulfuric acid pipe (7) penetrates through the box wall of the box body (1) and extends out of the box body (1), and the sulfuric acid pipe (7) is communicated with a sulfuric acid box (9) through a sulfuric acid pump (8); the outer peripheral wall of the first supporting plate (10) is attached to the inner peripheral wall of the reaction cylinder (6), and a first strip-shaped groove (11) is formed in the lower end face of the first supporting plate (10); the second supporting plate (12) is horizontally arranged at the bottom of the first supporting plate (10), a second strip-shaped groove (13) opposite to the first strip-shaped groove (11) is formed in the upper end face of the second supporting plate (12), a plurality of groups of vertical liquid outlet holes (14) are formed in the bottom of the second strip-shaped groove (13), a plurality of groups of vertically opposite air outlet holes (16) are formed in the first supporting plate (10) and the second supporting plate (12), and the plurality of groups of air outlet holes (16) are positioned on the periphery of the first strip-shaped groove (11); the liquid discharge pipe (19) is arranged at the bottom of the reaction cylinder (6), and the liquid discharge pipe (19) penetrates through the wall of the box body (1) and extends out of the box body (1); the gas outlet branch pipe (20) is arranged at the top of the reaction cylinder (6), the gas outlet branch pipe (20) is communicated with the inner cavity of the reaction cylinder (6), and the gas outlet end of the gas outlet branch pipe (20) is communicated with the first gas outlet pipe (21); two groups of reaction components are arranged;
the first air outlet pipe (21) penetrates through the partition plate (22) and extends above the partition plate (22); the baffle plate (22) is horizontally arranged in the box body (1), the baffle plate (22) is positioned above the reaction cylinder (6), the baffle plate (22) is provided with an annular groove (23), and the annular groove (23) forms openings on the peripheral surface and the upper end surface of the baffle plate (22); the sulfuric acid circulating pipe (24) is arranged on the tank body (1), the feeding end of the sulfuric acid circulating pipe (24) is communicated with the annular groove (23), and the discharging end of the sulfuric acid circulating pipe (24) is inserted into the sulfuric acid tank (9); the power device (25) is arranged on the outer wall of the box body (1), and the power device (25) is in transmission connection with the rotating shaft (26); the rotating shaft (26) penetrates through the box wall of the box body (1) and extends into the box body (1), the rotating shaft (26) is horizontally arranged, the rotating shaft (26) is positioned above the partition plate (22), and vertical rotating blades (27) are arranged on the rotating shaft (26); the second air outlet pipe (28) is arranged at the top of the box body (1), and an air outlet valve (29) is arranged on the second air outlet pipe (28).
2. The high-efficiency ammonium sulfate saturator according to claim 1, wherein the outlet holes (14) are provided with mesh gauze (15) on the walls.
3. The high-efficiency ammonium sulfate saturator is characterized in that a vertical spray pipe (17) is arranged at the top of the first support plate (10), the spray pipe (17) is communicated with the first linear groove (11), a spray head (18) is arranged at the top of the spray pipe (17), and the spray head (18) is positioned right below the air inlet end of the air outlet branch pipe (20).
4. A high efficiency ammonium sulfate saturator according to claim 1 wherein the rotating blades (27) are arranged in parallel on the rotating shaft (26).
5. The high-efficiency ammonium sulfate saturator according to claim 1, wherein the guide pipe (30) is arranged at the top of the first outlet pipe (21), the first outlet pipe (21) is communicated with the guide pipe (30), and the outlet end of the guide pipe (30) is far away from the second outlet pipe (28).
6. The high-efficiency ammonium sulfate saturator according to claim 1, characterized in that the universal wheels (31) are arranged at the bottom of the supporting column (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022842147.9U CN213803664U (en) | 2020-11-30 | 2020-11-30 | Efficient ammonium sulfate saturator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022842147.9U CN213803664U (en) | 2020-11-30 | 2020-11-30 | Efficient ammonium sulfate saturator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213803664U true CN213803664U (en) | 2021-07-27 |
Family
ID=76941805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022842147.9U Expired - Fee Related CN213803664U (en) | 2020-11-30 | 2020-11-30 | Efficient ammonium sulfate saturator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213803664U (en) |
-
2020
- 2020-11-30 CN CN202022842147.9U patent/CN213803664U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210727 |
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| CF01 | Termination of patent right due to non-payment of annual fee |