CN220214371U - Cement mill batching vent dust arrester installation - Google Patents
Cement mill batching vent dust arrester installation Download PDFInfo
- Publication number
- CN220214371U CN220214371U CN202321462323.3U CN202321462323U CN220214371U CN 220214371 U CN220214371 U CN 220214371U CN 202321462323 U CN202321462323 U CN 202321462323U CN 220214371 U CN220214371 U CN 220214371U
- Authority
- CN
- China
- Prior art keywords
- dust
- dust collection
- tank
- vent
- sewage
- 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.)
- Active
Links
- 239000000428 dust Substances 0.000 title claims abstract description 259
- 239000004568 cement Substances 0.000 title claims abstract description 45
- 238000009434 installation Methods 0.000 title claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 239000010865 sewage Substances 0.000 claims description 62
- 238000005507 spraying Methods 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 abstract description 21
- 239000007921 spray Substances 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 6
- 239000004615 ingredient Substances 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000001238 wet grinding Methods 0.000 description 1
Abstract
The utility model discloses a cement grinding batching vent dust collection device, which relates to the technical field of cement grinding and comprises a cement grinding batching vent dust collection device main body, wherein the cement grinding batching vent dust collection device main body comprises a dust collection tank, a dust inlet pipe is fixedly arranged above the side wall of the dust collection tank, a dust collection mechanism is arranged inside the dust collection tank, and a dust fall mechanism is arranged above the dust collection tank. According to the dust collection device, dust is collected through the dust collection fan through the exhaust pipe, so that the dust enters the dust collection tank through the dust inlet pipe, the working water of the booster pump sprays the dust entering the dust collection tank through the spray dust-falling shower head, dust is reduced in the first time, dust is prevented from scattering everywhere, the dust is sprayed and wetted by the spray dust-falling shower head, the dust is agglomerated and falls into the conical dust collection filter barrel, the water can be filtered out through the fine net on the surface of the conical dust collection filter barrel, and the dust collection effect is good.
Description
Technical Field
The utility model relates to the technical field of cement grinding mills, in particular to a dust collecting device of a ventilation opening of a cement grinding mill batching.
Background
The cement mill is a key device for crushing materials after the materials are crushed, and is widely applied to cement, silicate products, novel building materials, refractory materials, fertilizers, black and nonferrous metal ore dressing, glass ceramics and other production industries, dry or wet grinding is carried out on various ores and other grindability materials, waste gas is required to be removed in the process of proportioning and using the cement mill, and a dust collector is required to be additionally arranged at an air outlet of the cement mill. However, the traditional cement grinding batching dust collection device has poor dust cleaning effect, and most of the dust can only be collected, and the diffusion of the dust can not be restrained in time, so that the dust can be diffused greatly in a working space, and therefore, the utility model provides the cement grinding batching vent dust collection device.
In the prior art, a Chinese patent document with publication number of CN218741101U and publication date of 2023, 03 and 28 is proposed to solve the above technical problems, and the technical scheme disclosed in the patent document is as follows: the utility model provides a cement grinds batching vent dust arrester installation, relates to cement mill technical field, has solved traditional cement and has ground the poor problem of batching dust arrester installation to dust cleaning effect, including the dust removal jar, the top intercommunication of dust removal jar one side has the butt joint return bend that can communicate each other with the end of giving vent to anger of cement mill, the intercommunication has a fixed section of thick bamboo on the dust removal jar, be provided with the fan in the fixed section of thick bamboo, the left side fixedly connected with baffle at dust removal jar inner chamber top, be provided with supplementary dust removal mechanism in the dust removal jar.
In order to solve the problem that the cleaning effect of traditional cement mill batching dust arrester installation to the dust is relatively poor, most can only collect the dust, can't in time restrain the diffusion of dust, prior art adopts to set up the fan, can be fast with the dust removal jar evacuation state, utilize inside and outside air pressure difference, the accessible butt joint return bend is with the dust-laden gas in the cement mill inhale the dust removal jar fast, simultaneously the filter screen can separate the dust, supplementary dust removal mechanism's design simultaneously, can transmit the water purification in the water tank to square intercommunication box with the water pump, and spout through fixed pipe and the epaxial first apopore of vertical and second apopore, be convenient for carry out the water to the dust fast and drench the mode of subsidence and handle, but can also appear the fan and be difficult to really draw the dust removal jar evacuation state and the general condition of efficiency that the baffle exists to lead to the fan exhaust, and then lead to the dust removal jar to the absorption inefficiency to the dust, the problem that the later stage causes the water resource waste.
Disclosure of Invention
The utility model aims to provide a dust collecting device of a cement mill batching vent, which aims to solve the problems in the background technology.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the cement grinding batching vent dust collection device comprises a cement grinding batching vent dust collection device main body, wherein the cement grinding batching vent dust collection device main body comprises a dust collection tank, a dust inlet pipe is fixedly arranged above the side wall of the dust collection tank, a dust collection mechanism is arranged inside the dust collection tank, and a dust fall mechanism is arranged above the dust collection tank; the dust collection mechanism comprises a dust collection unit and a dust filtering unit, the dust collection unit is arranged on one side of the dust collection tank, and the dust filtering unit is arranged in the dust collection tank; the dust fall mechanism comprises a spraying dust fall unit and a sewage collection unit, wherein the spraying dust fall unit is arranged above the dust collection tank, and the sewage collection unit is arranged on the outer side of the dust collection tank.
The technical scheme of the utility model is further improved as follows: the dust collection unit comprises an exhaust pipe, the upper end of the exhaust pipe is fixedly connected with the lower part of the side wall of the dust collection tank, and the lower end of the exhaust pipe is fixedly provided with a dust collection fan.
By adopting the technical scheme, the bottom of the dust collection tank is provided with the empty slot, and the exhaust pipe penetrates through the side wall of the dust collection tank.
The technical scheme of the utility model is further improved as follows: the dust filtering unit comprises a conical dust collecting filter barrel fixedly arranged in the middle of the inner wall of the dust collecting tank, and a drain pipe is fixedly arranged at the lower end of the conical dust collecting filter barrel.
By adopting the technical scheme, the control valve is arranged in the sewage drain pipe.
The technical scheme of the utility model is further improved as follows: the inside fixed mounting of blow off pipe has the control valve, the below of blow off pipe is provided with the dust box that connects.
By adopting the technical scheme, the dust collecting box is independently arranged at the bottom empty slot of the dust collecting tank, so that the dust can be conveniently taken out and treated in the later stage.
The technical scheme of the utility model is further improved as follows: the spraying dust fall unit comprises a first booster pump fixedly arranged at the top of the dust collection tank, the top of the inner surface of the dust collection tank is fixedly provided with a spraying dust fall shower head, and an output pipe of the first booster pump penetrates through the inner wall of the top of the dust collection tank and is fixedly connected with the inner wall of the spraying dust fall shower head.
By adopting the technical scheme, the water inlet pipe end of the first booster pump is inserted into the lower part of the interior of the sewage collecting barrel through the water pipe.
The technical scheme of the utility model is further improved as follows: the sewage collecting unit comprises a sewage collecting bucket arranged on the outer side of the dust collecting tank, a sewage pump is arranged between the sewage collecting bucket and the dust collecting fan, a sewage discharging U-shaped pipe is fixedly arranged at a water inlet pipe of the sewage pump, and the upper end of the sewage discharging U-shaped pipe is fixedly connected with the inner wall of the bottom of the dust collecting tank.
By adopting the technical scheme, the sewage discharge U-shaped pipe penetrates through the inner wall of the bottom of the dust collection tank, and the output pipe of the sewage pump penetrates through the side wall of the sewage collection tank and is fixedly connected with the side wall of the sewage collection tank.
The technical scheme of the utility model is further improved as follows: the upper surface of the top cover of the sewage collecting barrel is fixedly provided with a water feeding pump, and an output pipe of the water feeding pump is fixedly connected with the inner wall of the bottom of the sewage collecting barrel.
By adopting the technical scheme, the water inlet pipe of the water feeding pump can be used only by being connected with the tap water pipe.
By adopting the technical scheme, compared with the prior art, the utility model has the following technical progress:
1. the utility model provides a dust collecting device of a cement grinding and batching vent, wherein a dust inlet pipe is required to be fixed with the cement grinding and batching vent, a dust suction fan sucks dust through an exhaust pipe to enable dust to enter the dust collecting tank through the dust inlet pipe, so that the dust suction efficiency is effectively improved, a booster pump is used for spraying the dust entering the dust collecting tank through a spraying dust-falling shower head, dust is reduced in the first time, and dust is prevented from scattering everywhere.
2. The utility model provides a cement grinding batching vent dust collecting device, dust is sprayed and wetted by a spray dust-settling sprinkler, agglomerates fall into a conical dust-collecting filter barrel, a fine net on the surface of the conical dust-collecting filter barrel can filter water out to collect the dust, a blow-off pipe internal control valve at the bottom of the conical dust-collecting filter barrel is opened, and the dust collected in the conical dust-collecting filter barrel can be discharged through the blow-off pipe and collected by a dust collecting box, so that the dust collecting effect is good.
3. The utility model provides a cement grinding feed vent dust collecting device, wherein sewage filtered by a conical dust collecting filter barrel is re-input into a sewage collecting barrel through a sewage discharge U-shaped pipe by a sewage pump for collection, a water inlet pipe of a water feeding pump is connected with a tap water pipe, water is supplemented into the sewage collecting barrel and is re-mixed with sewage, and the sewage is absorbed and utilized by a water inlet pipe of a booster pump again, so that the aim of saving water resources is fulfilled.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic top view of the structure of the present utility model;
FIG. 3 is a schematic cross-sectional view of a structural dust collection tank of the present utility model;
FIG. 4 is a schematic view of a structural dust collection tank in cross section;
FIG. 5 is a schematic view of a dust settling mechanism of the present utility model.
In the figure: 1. a cement mill batching vent dust collection device main body; 11. a dust collection tank; 12. a dust inlet pipe; 2. a dust collection mechanism; 21. a dust collection fan; 22. an exhaust pipe; 23. conical dust collection filter vat; 24. a blow-down pipe; 25. a dust collecting box; 3. a dust fall mechanism; 31. a first booster pump; 32. spraying a dust-falling shower; 33. a sewage collection bucket; 34. a sewage pump; 341. a sewage discharge U-shaped pipe; 35. and (5) feeding a water pump.
Detailed Description
The utility model is further illustrated by the following examples:
example 1
As shown in fig. 1-5, the utility model provides a cement grinding ingredient vent dust collection device, which comprises a cement grinding ingredient vent dust collection device main body 1, wherein the cement grinding ingredient vent dust collection device main body 1 comprises a dust collection tank 11, a dust inlet pipe 12 is fixedly arranged above the side wall of the dust collection tank 11, a dust collection mechanism 2 is arranged in the dust collection tank 11, and a dust fall mechanism 3 is arranged above the dust collection tank 11; the dust collection mechanism 2 comprises a dust collection unit and a dust filtering unit, wherein the dust collection unit is arranged on one side of the dust collection tank 11, and the dust filtering unit is arranged in the dust collection tank 11; the dust settling mechanism 3 comprises a spraying dust settling unit and a sewage collecting unit, wherein the spraying dust settling unit is arranged above the dust collecting tank 11, the sewage collecting unit is arranged on the outer side of the dust collecting tank 11, the dust collecting unit comprises an exhaust pipe 22, the upper end of the exhaust pipe 22 is fixedly connected with the lower side of the side wall of the dust collecting tank 11, a dust collecting fan 21 is fixedly arranged at the lower end of the exhaust pipe 22, a dust inlet pipe 12 is required to be fixed with a cement grinding batching vent, the dust collecting fan 21 sucks dust through the exhaust pipe 22 to enable the dust to enter the dust collecting tank 11 through the dust inlet pipe 12, the dust collecting efficiency is effectively improved, the dust filtering unit comprises a conical dust collecting filter barrel 23 fixedly arranged in the middle of the inner wall of the dust collecting tank 11, a blow-off pipe 24 is fixedly arranged at the lower end of the conical dust collecting filter barrel 23, dust is sprayed and wetted by a spray dust falling shower 32 and then agglomerations fall into the conical dust collecting filter barrel 23, and a fine net on the surface of the conical dust collecting filter barrel 23 can filter water.
Example 2
As shown in fig. 1-5, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the inside fixed mounting of blow off pipe 24 has the control valve, the below of blow off pipe 24 is provided with connects dirt box 25, open the inside control valve of blow off pipe 24 of toper collection dirt filter vat 23 bottom, can be through the dust discharge of blow off pipe 24 with the inside collection of toper collection dirt filter vat 23 by connecing dirt box 25 collection, dust removal effect is good, spray dust fall unit is including fixed mounting at the booster pump one 31 at dust collection jar 11 top, the internal surface top fixed mounting of dust collection jar 11 has spray dust fall gondola water faucet 32, the output tube of booster pump one 31 runs through the top inner wall of dust collection jar 11 and sprays dust fall gondola water faucet 32's inner wall fixed connection, booster pump one 31 work water sprays the dust that gets into dust collection jar 11 through spray dust fall gondola water faucet 32, the dust falls the first time, avoid the dust to fly around.
Example 3
As shown in fig. 1-5, on the basis of embodiment 1, the present utility model provides a technical solution: preferably, the sewage collecting unit comprises a sewage collecting barrel 33 arranged on the outer side of the dust collecting tank 11, a sewage draining pump 34 is arranged between the sewage collecting barrel 33 and the dust collecting fan 21, a sewage draining U-shaped pipe 341 is fixedly arranged at a water inlet pipe of the sewage draining pump 34, the upper end of the sewage draining U-shaped pipe 341 is fixedly connected with the inner wall of the bottom of the dust collecting tank 11, sewage filtered by the conical dust collecting filter barrel 23 is re-input into the sewage collecting barrel 33 for collecting through the sewage draining pump 34, a water feeding pump 35 is fixedly arranged on the upper surface of a top cover of the sewage collecting barrel 33, an output pipe of the water feeding pump 35 is fixedly connected with the inner wall of the bottom of the sewage collecting barrel 33, a water inlet pipe of the water feeding pump 35 is connected with a tap water pipe, water is supplemented inside the sewage collecting barrel 33 and is re-mixed with the sewage, and the sewage is absorbed by a water inlet pipe of the booster pump 31 again for use, and the purpose of saving water resources is achieved.
The working principle of the dust collecting device of the ventilation opening of the cement grinding ingredient is specifically described below.
As shown in fig. 1 to 5, firstly, the dust inlet pipe 12 is fixed with a cement grinding and proportioning vent, the dust suction fan 21, the booster pump one 31 and the like are started, the dust suction fan 21 sucks dust through the exhaust pipe 22 to enable the dust to enter the dust collection tank 11 through the dust inlet pipe 12, then, the booster pump one 31 works water to spray the dust entering the dust collection tank 11 through the spray dust falling sprinkler 32, dust falls down in the first time, the dust is sprayed and wetted by the spray dust falling sprinkler 32 and then drops into the conical dust collection filter barrel 23, a fine net on the surface of the conical dust collection filter barrel 23 can filter water to collect the dust, finally, the sewage filtered by the conical dust collection filter barrel 23 is re-input into the sewage collection barrel 33 through the sewage discharge U-shaped pipe 341, the water inlet pipe of the water inlet pump 35 is connected with a tap water pipe to supplement the inside the sewage collection barrel 33, the sewage is re-mixed with the sewage again to be absorbed by the water inlet pipe of the booster pump one 31 to spray all pumps are turned off, the internal control valve of the conical dust collection barrel 24 at the bottom of the conical dust collection filter barrel 23 is turned on, and the conical dust collection filter barrel 23 can be discharged through the sewage discharge pipe 24 to the inside the conical dust collection filter barrel 23 to the dust collection box 25.
The foregoing utility model has been generally described in great detail, but it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, it is intended to cover modifications or improvements within the spirit of the inventive concepts.
Claims (7)
1. The utility model provides a cement mill batching vent dust arrester installation, is applicable to the vent dust collection of cement mill batching and uses, including cement mill batching vent dust arrester installation main part (1), cement mill batching vent dust arrester installation main part (1) are including gathering dust jar (11), the lateral wall top fixed mounting who gathers dust jar (11) has dust inlet pipe (12), its characterized in that: a dust collection mechanism (2) is arranged in the dust collection tank (11), and a dust fall mechanism (3) is arranged above the dust collection tank (11);
the dust collection mechanism (2) comprises a dust collection unit and a dust filtering unit, wherein the dust collection unit is arranged on one side of the dust collection tank (11), and the dust filtering unit is arranged in the dust collection tank (11);
the dust settling mechanism (3) comprises a spraying dust settling unit and a sewage collecting unit, wherein the spraying dust settling unit is arranged above the dust collecting tank (11), and the sewage collecting unit is arranged on the outer side of the dust collecting tank (11).
2. A cement mill feed vent dust collection device according to claim 1, wherein: the dust collection unit comprises an exhaust pipe (22), the upper end of the exhaust pipe (22) is fixedly connected with the lower part of the side wall of the dust collection tank (11), and the lower end of the exhaust pipe (22) is fixedly provided with a dust collection fan (21).
3. A cement mill feed vent dust collection device according to claim 1, wherein: the dust filtering unit comprises a conical dust collecting filter barrel (23) fixedly arranged in the middle of the inner wall of the dust collecting tank (11), and a drain pipe (24) is fixedly arranged at the lower end of the conical dust collecting filter barrel (23).
4. A cement mill feed vent dust collection device according to claim 3, wherein: the inside of blow off pipe (24) is fixed mounting has the control valve, the below of blow off pipe (24) is provided with dust receiving box (25).
5. A cement mill feed vent dust collection device according to claim 1, wherein: the spraying dust fall unit comprises a first booster pump (31) fixedly installed at the top of the dust collection tank (11), a spraying dust fall shower head (32) is fixedly installed at the top of the inner surface of the dust collection tank (11), and an output pipe of the first booster pump (31) penetrates through the inner wall of the top of the dust collection tank (11) and is fixedly connected with the inner wall of the spraying dust fall shower head (32).
6. A cement mill feed vent dust collection device according to claim 1, wherein: the sewage collecting unit comprises a sewage collecting barrel (33) arranged on the outer side of the dust collecting tank (11), a sewage discharging pump (34) is arranged between the sewage collecting barrel (33) and the dust collecting fan (21), a sewage discharging U-shaped pipe (341) is fixedly arranged at a water inlet pipe of the sewage discharging pump (34), and the upper end of the sewage discharging U-shaped pipe (341) is fixedly connected with the inner wall of the bottom of the dust collecting tank (11).
7. A cement mill feed vent dust collection device according to claim 6, wherein: the upper surface of the top cover of the sewage collecting barrel (33) is fixedly provided with a water feeding pump (35), and an output pipe of the water feeding pump (35) is fixedly connected with the inner wall of the bottom of the sewage collecting barrel (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321462323.3U CN220214371U (en) | 2023-06-09 | 2023-06-09 | Cement mill batching vent dust arrester installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321462323.3U CN220214371U (en) | 2023-06-09 | 2023-06-09 | Cement mill batching vent dust arrester installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220214371U true CN220214371U (en) | 2023-12-22 |
Family
ID=89187919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321462323.3U Active CN220214371U (en) | 2023-06-09 | 2023-06-09 | Cement mill batching vent dust arrester installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220214371U (en) |
-
2023
- 2023-06-09 CN CN202321462323.3U patent/CN220214371U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101775625A (en) | Method and device for purifying electrolytic aluminum smoke | |
| CN208244814U (en) | A kind of discarded concrete crushing device | |
| CN205948590U (en) | Coal mine dedusting apparatus | |
| CN220214371U (en) | Cement mill batching vent dust arrester installation | |
| CN207012724U (en) | A kind of environmental-friendly glass fiber dust absorption device | |
| CN112495105A (en) | Dust removal method for grinding machine machining | |
| CN206381822U (en) | A kind of tin metallurgy flue gas desulfurization multifunction system | |
| CN212663073U (en) | Pulverizer with dust removing device | |
| CN215539480U (en) | Atomizing dust removal device for mining | |
| CN114054458A (en) | Iron oxide dust recovery device | |
| CN207845358U (en) | A kind of full-automatic separation of solid and liquid sewage disposal system | |
| CN216827636U (en) | Domestic ceramic processing is with ceramic ball mill | |
| CN2589051Y (en) | Gas explosion type dust-collector | |
| CN205925314U (en) | Dedusting device | |
| CN213727197U (en) | Efficient hydraulic cyclone sewage interception equipment | |
| CN209662813U (en) | A kind of equipment for treating industrial waste gas | |
| CN218692448U (en) | Dust fall mechanism in broken stone crushing process | |
| CN218249304U (en) | Spraying-free siphon type cyclone water film dust remover | |
| CN220090906U (en) | Tail gas dust removal device of yeast drying tower | |
| CN213314117U (en) | Equipment for eliminating paper dust | |
| CN218392913U (en) | Flue gas dust remover for sintering machine | |
| CN212999100U (en) | Sintering furnace feeding dust remover | |
| CN214600790U (en) | A dust collection device for engineering construction | |
| CN212632144U (en) | Dust removal mechanism of mixer main building | |
| CN213885479U (en) | Water filtration air purification device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |