CN112755791A - Ultrafiltration membrane emptying system - Google Patents
Ultrafiltration membrane emptying system Download PDFInfo
- Publication number
- CN112755791A CN112755791A CN202011509269.4A CN202011509269A CN112755791A CN 112755791 A CN112755791 A CN 112755791A CN 202011509269 A CN202011509269 A CN 202011509269A CN 112755791 A CN112755791 A CN 112755791A
- Authority
- CN
- China
- Prior art keywords
- membrane
- water
- valve
- pipeline
- 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.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/20—Accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
Landscapes
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides an ultrafiltration membrane emptying system which comprises an ultrafiltration membrane component, wherein the ultrafiltration membrane component comprises a membrane shell, membrane wires, a water inlet, a water producing port and a thick water port, the membrane wires are arranged on the inner side of the membrane shell, the water inlet and the water producing port are respectively positioned at the lower end and the upper end of the membrane shell, the water inlet is communicated with the outer surface of the membrane wires, the water producing port is communicated with an opening at the end part of the membrane wires, the thick water port is arranged on the side surface of the membrane shell, the water inlet is communicated with the thick water port, the ultrafiltration membrane emptying system further comprises a gas supply device, a thick water stop valve, a thick water inlet valve, a water inlet stop valve and a lower discharge valve, the thick water port is communicated with the thick water stop valve through a pipeline, the pipeline between the thick water port and the thick water stop valve is also communicated with the gas supply device through the thick. According to the invention, the membrane module emptying efficiency is improved by arranging the concentrated water pipeline for air intake, and backwashing water retention is avoided.
Description
Technical Field
The invention relates to the technical field of water treatment equipment, in particular to an ultrafiltration membrane emptying system.
Background
With the gradual popularization of ultrafiltration membrane technology, the ultrafiltration membrane is widely applied to various industries with strict requirements on the concentration of produced liquid, such as concentration separation, vehicle urea preparation and the like, however, an ultrafiltration membrane component needs to be cleaned or maintained after working for a certain time, a system needs to be emptied during cleaning and maintenance, the traditional evacuation of the ultrafiltration membrane component is realized by backwashing and emptying in a gravity mode, however, the evacuation mode easily causes backwash liquid to be remained in a pipeline and the membrane component and cannot be completely removed, and finally the concentration of the produced liquid of subsequent production treatment cannot reach the standard due to the residual backwash liquid.
Disclosure of Invention
In view of the above, the present invention provides an ultrafiltration membrane evacuation system with better evacuation performance.
The technical scheme of the invention is realized as follows: the invention provides an ultrafiltration membrane emptying system which comprises an ultrafiltration membrane component, wherein the ultrafiltration membrane component comprises a membrane shell, membrane wires, a water inlet, a water producing port and a thick water port, the membrane wires are arranged on the inner side of the membrane shell, the water inlet and the water producing port are respectively positioned at the lower end and the upper end of the membrane shell, the water inlet is communicated with the outer surface of the membrane wires, the water producing port is communicated with an opening at the end part of the membrane wires, the thick water port is arranged on the side surface of the membrane shell, the water inlet is communicated with the thick water port, the ultrafiltration membrane emptying system further comprises a gas supply device, a thick water stop valve, a thick water inlet valve, a water inlet stop valve and a lower discharge valve, the thick water port is communicated with the thick water stop valve through a pipeline, the pipeline between the thick water port and the thick water stop valve is also communicated with the gas supply device through the thick.
On the basis of above technical scheme, preferred, still including producing water trip valve and producing water admission valve, produce the mouth of a river and communicate each other with producing the water trip valve through the pipeline, produce the mouth of a river and produce the pipeline between the water trip valve and communicate each other with gas supply equipment through producing water admission valve.
On the basis of the technical scheme, the water production control device is preferable and further comprises a water production discharge valve, and a pipeline between the water production air inlet valve and the water production cut-off valve is communicated with the water production discharge valve.
On the basis of the above technical solution, preferably, the water producing discharge valve is located below the water producing port.
Still further preferably, the ultrasonic testing device further comprises an ultrasonic vibrator, and the ultrasonic vibrator is fixedly arranged on the surface of the membrane shell.
On the basis of the technical scheme, the membrane silk connector is preferably further included, the membrane silk connector is of a plate-shaped structure, the membrane silk connector is fixedly installed on the inner wall of the membrane shell along the cross section direction of the membrane shell, the shape of the membrane silk connector is the same as that of the cross section of the inner cavity of the membrane shell, a plurality of water permeable holes and membrane silk holes are formed in the surface array of the membrane silk connector, and the membrane silk is embedded in the membrane silk holes.
On the basis of the above technical solution, preferably, the membrane wire connector is located on an inner wall of the membrane shell where the ultrasonic vibrator is located.
On the basis of the technical scheme, preferably, the lower discharge valve is positioned below the water inlet stop valve
Compared with the prior art, the ultrafiltration membrane emptying system has the following beneficial effects:
(1) according to the invention, the concentrated water pipeline and the backwashing water in the corresponding membrane shell are emptied by adopting a concentrated water pipeline air inlet mode, so that the backwashing water is prevented from being retained in the water pipe and the membrane shell to influence the treatment of the next batch of liquid;
(2) in order to further ensure the emptying effect of the backwashing water, a water production inlet valve is also arranged, the backwashing water in the water production pipeline is effectively prevented from being retained in the membrane wires by emptying the water production pipeline, and a water production discharge valve is further arranged on the water production pipeline, so that the backwashing water in the water production pipeline is quickly emptied, the emptying efficiency is improved, and the burden of membrane wire emptying is reduced;
(3) furthermore, in order to ensure that emptying time lag is remained between the membrane filaments and the backwashing water on the surface of the membrane filaments and the surface of the membrane shell, the membrane shell and the backwashing water on the surface of the membrane shell are also provided with the ultrasonic vibrator and the membrane filament connector, and the membrane shell and the backwashing water between the membrane filaments are emptied by means of high-frequency mechanical vibration, so that the efficiency is better, and the emptying effect is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a pipeline connection diagram of an ultrafiltration membrane evacuation system according to the present invention;
FIG. 2 is a side cross-sectional view of an ultrafiltration membrane module of the ultrafiltration membrane evacuation system of the present invention;
fig. 3 is a top view of a membrane wire connector of an ultrafiltration membrane evacuation system of the present invention.
In the figure: 1-membrane shell, 2-membrane wire, 3-water inlet, 4-water producing port, 5-concentrated water port, 6-gas supply equipment, 7-concentrated water cut-off valve, 8-concentrated water inlet valve, 9-water inlet cut-off valve, 10-lower discharge valve, 11-water producing cut-off valve, 12-water producing inlet valve, 13-water producing discharge valve, 14-ultrasonic vibrator, 15-membrane wire connector, 16-water permeable hole and 17-membrane wire hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, with reference to fig. 2-3, the ultrafiltration membrane evacuation system of the present invention comprises an ultrafiltration membrane module, wherein the ultrafiltration membrane module comprises a membrane shell 1, membrane wires 2, a water inlet 3, a water producing port 4 and a concentrate port 5, the membrane wires 2 are mounted inside the membrane shell 1, the water inlet 3 and the water producing port 4 are respectively located at the lower end and the upper end of the membrane shell 1, the water inlet 3 is communicated with the outer surface of the membrane wires 2, the water producing port 4 is communicated with an opening at the end of the membrane wires 2, the concentrate port 5 is arranged at the side of the membrane shell 1, the water inlet 3 is communicated with the concentrate port 5, the system further comprises a gas supply device 6, a concentrate shut-off valve 7, a concentrate inlet valve 9, a water inlet shut-off valve 9 and a lower drain valve 10, the concentrate port 5 is communicated with the concentrate shut-off valve 7 through a pipeline, the pipeline between the concentrate shut-off valve 5 and the concentrate valve 7 is, the pipeline between the water inlet 3 and the water inlet shut-off valve 9 is also communicated with the outside through a lower discharge valve 10.
In the above embodiment, the water inlet 3 is used for inputting liquid to be treated, the water producing port 4 is used for outputting the filtered liquid, the concentrated water port 5 is used for discharging the residual high-concentration liquid after being filtered, the air supply device 6 provides gas for evacuation, the concentrated water shut-off valve 7 is used for controlling the opening and closing of a pipeline discharged by the concentrated water port 5, the concentrated water intake valve 8 is used for controlling the communication of the pipeline between the air supply device 6 and the concentrated water port 5, the water inlet shut-off valve 9 is used for controlling the opening and closing of a water inlet pipeline of the water inlet 3, the lower discharge valve 10 is used for communicating the water inlet 3, the independent discharge effect is achieved, when the concentrated water shut-off valve 7 and the water inlet shut-off valve 9 are closed, and the lower discharge valve 10 and the concentrated water intake valve 8 are opened, the residual moisture on the concentrated water pipeline, the inner side surface of the membrane shell.
In the concrete embodiment, still include water production trip valve 11 and water production admission valve 12, water production mouth 4 communicates each other with water production trip valve 11 through the pipeline, and the pipeline between water production mouth 4 and the water production trip valve 11 communicates each other with gas supply equipment 6 through water production admission valve 12.
In the above embodiment, the water production stop valve 11 is used for controlling the opening and closing of the pipeline where the water production port 4 is located, the water production air inlet valve 12 is used for controlling whether the air path between the air supply device 6 and the water production port 4 is communicated or not, so as to control whether the water production pipeline and the inner side of the membrane wire 2 are subjected to evacuation treatment from the water production port 4, and the water production inlet valve 12 is opened to realize the evacuation treatment of backwash water in the water production pipeline and the inner side of the membrane wire 2 by closing the concentrated water stop valve 7, the water inlet stop valve 9, the water production stop valve 11 and the concentrated water inlet valve 8.
In the specific embodiment, a water production discharge valve 13 is further included, and a pipeline between the water production inlet valve 12 and the water production cut-off valve 11 is communicated with the water production discharge valve 13.
In the above embodiment, the produced water discharge valve 13 is used to quickly drain the backwash water in the produced water pipeline, and the produced water inlet valve 12 and the produced water discharge valve 13 are opened by closing the concentrate cut-off valve 7, the water inlet cut-off valve 9, the produced water cut-off valve 11, the concentrate inlet valve 8 and the lower discharge valve 10, so that the backwash water in the produced water pipeline is quickly discharged through the produced water discharge valve 13.
In a particular embodiment, said water production discharge valve 13 is located below the water production opening 4.
In the above embodiment, the above arrangement can ensure that the water in the produced water pipeline can be discharged quickly through the produced water discharge valve 13 as much as possible.
In the specific embodiment, the ultrasonic vibrator 14 is further included, and the ultrasonic vibrator 14 is fixedly installed on the surface of the membrane shell 1.
In the above embodiment, because the distance between the membrane filaments 2 in the ultrafiltration membrane module is short, water on the surface of the membrane filaments after backwashing is easily subjected to capillary phenomenon and is not easily discharged under the action of gravity, and when the air exhaust body cannot directly act on the surface of the membrane filaments 2, backwashing water still adheres to the surface of the membrane filaments and cannot be quickly emptied, so that the backwashing water on the surface of the membrane filaments 2 falls down through high-frequency vibration of the ultrasonic vibrator 14, and the purpose of emptying is achieved as much as possible.
In a specific embodiment, the membrane-silk connector 15 is a plate-shaped structure, the membrane-silk connector 15 is fixedly mounted on the inner wall of the membrane shell 1 along the cross section direction of the membrane shell, the shape of the membrane-silk connector 15 is the same as the cross section of the inner cavity of the membrane shell 1, a plurality of water-permeable holes 16 and membrane-silk holes 17 are formed in the surface array of the membrane-silk connector 15, and the membrane silk 2 is embedded in the membrane-silk holes 17.
In the above embodiment, since the contact effect between the membrane housing 1 and the membrane thread 2 is not good, the vibration generated by the ultrasonic vibrator 14 may not be transmitted to the membrane thread 2 well, and the vibration effect is not good, and therefore, the vibration is transmitted using the membrane thread connector 15, and the vibration of the ultrasonic vibrator 14 is transmitted to the surface of the membrane thread 2 as much as possible.
In a specific embodiment, the membrane wire connector 15 is located on the inner wall of the membrane housing 1 where the ultrasound transducer 14 is located.
In the above embodiment, the membrane wire 2 is closer to the membrane wire connector 15 and the ultrasonic vibrator 14, so that the vibration transmission effect is better, the vibration energy of the ultrasonic vibrator 14 is directly transmitted to the membrane wire connector 15, the membrane shell 1 is not damaged, and the design is more reasonable.
In the specific embodiment, the lower discharge valve 10 is located below the water inlet shut-off valve 9.
In the above embodiment, the backwash water can be emptied as much as possible, so that the backwash water is prevented from being retained in the water inlet pipeline and affecting the treatment of the next batch of liquid.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides an ultrafiltration membrane evacuation system, it includes ultrafiltration membrane module, ultrafiltration membrane module includes membrane shell (1), membrane silk (2), water inlet (3), produce mouth of a river (4) and dense mouth of a river (5), install in membrane shell (1) inboard membrane silk (2), water inlet (3) and produce mouth of a river (4) and be located membrane shell (1) lower extreme and upper end respectively, water inlet (3) and membrane silk (2) surface intercommunication, produce mouth of a river (4) and membrane silk (2) tip opening intercommunication, dense mouth of a river (5) set up in membrane shell (1) side, water inlet (3) and dense mouth of a river (5) communicate each other, a serial communication port still includes air feeder (6), dense water trip valve (7), dense water admission valve (8), inlet trip valve (9) and lower discharge valve (10), dense mouth of a river (5) communicate each other with dense water (7) through pipeline, dense mouth of a river (5) and dense water trip valve (7) between pipeline still through dense water admission valve (8) and air feed valve (8) and air intake Equipment (6) intercommunication each other, water inlet (3) communicate with each other through pipeline and inlet trip valve (9), and the pipeline between water inlet (3) and inlet trip valve (9) still communicates with the outside through lower row valve (10).
2. Ultrafiltration membrane emptying system according to claim 1, further comprising a water production shut-off valve (11) and a water production inlet valve (12), wherein the water production port (4) is in communication with the water production shut-off valve (11) through a pipeline, and the pipeline between the water production port (4) and the water production shut-off valve (11) is in communication with the gas supply device (6) through the water production inlet valve (12).
3. Ultrafiltration membrane emptying system according to claim 2, further comprising a product water drain valve (13), wherein the pipeline between the product water inlet valve (12) and the product water shut-off valve (11) is in communication with the product water drain valve (13).
4. Ultrafiltration membrane emptying system according to claim 3, wherein the water production discharge valve (13) is located below the water production port (4).
5. The ultrafiltration membrane emptying system according to claim 1, further comprising an ultrasonic vibrator (14), wherein the ultrasonic vibrator (14) is fixedly arranged on the surface of the membrane shell (1).
6. The ultrafiltration membrane emptying system according to claim 5, further comprising a membrane wire connector (15), wherein the membrane wire connector (15) is of a plate-shaped structure, the membrane wire connector (15) is fixedly installed on the inner wall of the membrane shell (1) along the section direction of the membrane shell, the shape of the membrane wire connector is the same as the cross section of the inner cavity of the membrane shell (1), a plurality of water permeable holes (16) and membrane wire holes (17) are formed in the surface array of the membrane wire connector (15), and the membrane wires (2) are embedded in the membrane wire holes (17).
7. Ultrafiltration membrane emptying system according to claim 6, wherein the membrane wire connector (15) is located on the inner wall of the membrane housing (1) where the ultrasound transducer (14) is located.
8. Ultrafiltration membrane emptying system according to claim 1, wherein the drain valve (10) is located below the feed water shut-off valve (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011509269.4A CN112755791A (en) | 2020-12-18 | 2020-12-18 | Ultrafiltration membrane emptying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011509269.4A CN112755791A (en) | 2020-12-18 | 2020-12-18 | Ultrafiltration membrane emptying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112755791A true CN112755791A (en) | 2021-05-07 |
Family
ID=75694343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011509269.4A Pending CN112755791A (en) | 2020-12-18 | 2020-12-18 | Ultrafiltration membrane emptying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112755791A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004283798A (en) * | 2003-03-25 | 2004-10-14 | Masato Kino | Liquid separation apparatus using membrane |
| CN104817135A (en) * | 2015-04-27 | 2015-08-05 | 武汉恒通源环境工程技术有限公司 | Ultrafiltration membrane filtering device |
| CN209020206U (en) * | 2018-10-27 | 2019-06-25 | 南京丹恒科技有限公司 | A kind of fast evacuation device for tubular type membranous system |
| CN210206471U (en) * | 2019-05-17 | 2020-03-31 | 浙江瑞丰机械设备有限公司 | Hollow fiber ultrafiltration membrane nickel removing device |
| CN111298656A (en) * | 2020-03-18 | 2020-06-19 | 北京大井易通科技发展有限公司 | Backwashing system and method of roll type ultrafiltration membrane and water treatment system |
| CN211384555U (en) * | 2019-12-17 | 2020-09-01 | 河南锦源环保科技有限公司 | Ultrasonic cleaning device |
-
2020
- 2020-12-18 CN CN202011509269.4A patent/CN112755791A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004283798A (en) * | 2003-03-25 | 2004-10-14 | Masato Kino | Liquid separation apparatus using membrane |
| CN104817135A (en) * | 2015-04-27 | 2015-08-05 | 武汉恒通源环境工程技术有限公司 | Ultrafiltration membrane filtering device |
| CN209020206U (en) * | 2018-10-27 | 2019-06-25 | 南京丹恒科技有限公司 | A kind of fast evacuation device for tubular type membranous system |
| CN210206471U (en) * | 2019-05-17 | 2020-03-31 | 浙江瑞丰机械设备有限公司 | Hollow fiber ultrafiltration membrane nickel removing device |
| CN211384555U (en) * | 2019-12-17 | 2020-09-01 | 河南锦源环保科技有限公司 | Ultrasonic cleaning device |
| CN111298656A (en) * | 2020-03-18 | 2020-06-19 | 北京大井易通科技发展有限公司 | Backwashing system and method of roll type ultrafiltration membrane and water treatment system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101480581B (en) | External pressure type hollow fiber film component and using method | |
| CN108461749A (en) | A kind of ternary precursor Optimizing manufacture control device and its optimal control method | |
| CN203382593U (en) | Vertical integrated pressure water purifier | |
| CN208509788U (en) | Rice field water-saving fills row's control system | |
| CN112755791A (en) | Ultrafiltration membrane emptying system | |
| CN115259288A (en) | Low-power ultrafiltration purifier | |
| CN108465281A (en) | A kind of filtering-condensing apparatus and its filtration and concentration method | |
| CN105217729B (en) | Make-up water oxygen and carbon dioxide removal device | |
| CN106955596A (en) | A kind of blue algae water separating system | |
| CN210559578U (en) | Novel desulfurization waste water treatment device | |
| CN207918598U (en) | A kind of self-loopa sewage purifier based on PLC controls | |
| CN208617783U (en) | Acetylene generator Automated water seal apparatus | |
| CN207719323U (en) | A kind of dedicated miniature hydrogen purifying integral system of original position hydrogen manufacturing | |
| CN209093121U (en) | A kind of putamina submerged ultrafiltration component | |
| CN112774444A (en) | Free floating ball type gas-liquid separation ultrafiltration membrane component | |
| CN207511909U (en) | A kind of film bioreactor device | |
| CN219730697U (en) | Softened water treatment device | |
| CN215327044U (en) | Water purifier goes out water installation | |
| CN219272617U (en) | Hydrogen washing device | |
| CN203803219U (en) | Lime slurry pipeline filtering device | |
| CN206477409U (en) | Water pressurizer | |
| CN218931808U (en) | Underground unpowered hydraulic circulation purifying device | |
| CN203469605U (en) | Fine processor for condensed water | |
| CN215626945U (en) | Eco-iGDM technology-based energy-saving water production device | |
| CN220090989U (en) | Single pump circulating water device for gas treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210507 |