CN215233185U - Multistage desulphurization unit is used to industrial waste gas - Google Patents

Multistage desulphurization unit is used to industrial waste gas Download PDF

Info

Publication number
CN215233185U
CN215233185U CN202121218828.6U CN202121218828U CN215233185U CN 215233185 U CN215233185 U CN 215233185U CN 202121218828 U CN202121218828 U CN 202121218828U CN 215233185 U CN215233185 U CN 215233185U
Authority
CN
China
Prior art keywords
communicated
pipe
barrel body
waste gas
mixing box
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.)
Expired - Fee Related
Application number
CN202121218828.6U
Other languages
Chinese (zh)
Inventor
卢光华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Jin Jie Environmental Protection Technology Co ltd
Original Assignee
Shenzhen Jin Jie Environmental Protection Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Jin Jie Environmental Protection Technology Co ltd filed Critical Shenzhen Jin Jie Environmental Protection Technology Co ltd
Priority to CN202121218828.6U priority Critical patent/CN215233185U/en
Application granted granted Critical
Publication of CN215233185U publication Critical patent/CN215233185U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Treating Waste Gases (AREA)

Abstract

The utility model discloses a multistage desulphurization unit is used to industrial waste gas, including staving, stirring subassembly and filtering component: staving left side and intake pipe right-hand member intercommunication, the inside shower that is equipped with of staving, shower top both ends are connected with the electric telescopic handle output, and electric telescopic handle corresponds the setting and is in staving inner wall top both sides, the shower both ends with staving inner wall both sides sliding connection, a plurality of shower tops intercommunication that shower bottom and equidistance set up, the utility model discloses can carry out effectual desulfurization to waste gas, the first active carbon board and the second active carbon board of setting can filter the toxic material in the gas many times, can effectively improve the treatment effect to industrial waste gas, have improved desulphurization unit's work efficiency, can effectively satisfy staff's user demand.

Description

Multistage desulphurization unit is used to industrial waste gas
Technical Field
The utility model relates to an industrial desulfurization technical field specifically is a multistage desulphurization unit is used to industrial waste gas.
Background
Industrial waste gas refers to a general term of various pollutant-containing gases discharged into air in the process of fuel combustion and production processes in factory areas of enterprises, the substances enter human bodies through different respiratory tracts, some substances are directly harmful, some substances have an accumulation effect and can seriously harm the health of people, and different substances have different influences, so that a desulfurization device is required to be used for treating the industrial waste gas.
The utility model discloses a waste gas desulfurization device in the utility model with the bulletin number of CN213101537U, this utility model provides a waste gas desulfurization device possesses following beneficial effect: this exhaust gas desulfurization device, through save the absorption liquid in device body bottom, and adopt the (mixing) shaft to stir the absorption liquid, thereby improve absorption liquid desulfurization effect, avoid taking place to deposit, first baffle can remove the inside waste gas of device body to the absorption liquid that enters into, the mode that upper portion adopted to spray can improve absorption liquid and waste gas mixing effect, the air duct can be with gaseous leading-in to the absorption liquid once more after spraying, mix once more, improve whole desulfurization effect, opening or being closed of outlet duct can be controlled to the second baffle, be favorable to operating according to the desulfurization demand, overall structure uses desulfurization effect good.
But the device is still not ideal enough to industrial waste gas's treatment effect, probably still contains the toxic substance in the air after the processing, has reduced desulphurization unit's work efficiency, can't satisfy staff's user demand.
Therefore, we propose a multi-stage desulfurization apparatus for industrial waste gas to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multistage desulphurization unit is used to industrial waste gas to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a multistage desulphurization unit is used to industrial waste gas, includes staving, stirring subassembly and filtering component:
the left side of the barrel body is communicated with the right end of the air inlet pipe, a spray pipe is arranged in the barrel body, two ends of the top of the spray pipe are connected with the output end of an electric telescopic rod, the electric telescopic rods are correspondingly arranged on two sides of the top of the inner wall of the barrel body, two ends of the spray pipe are slidably connected with two sides of the inner wall of the barrel body, the bottom of the spray pipe is communicated with the tops of a plurality of spray heads which are arranged at equal intervals, the central position of the top of the spray pipe is communicated with the bottom of a water delivery hose, the top of the water delivery hose is communicated with the bottom of a mixing box, and the mixing box is arranged at the top of the barrel body;
the stirring assembly is arranged in the mixing box and used for fully mixing the liquid medicine, the stirring assembly comprises a stirring rod arranged in the mixing box, one end of the stirring rod penetrates through the mixing box and extends to the outside of the mixing box to be connected with the output end of a driving motor, the driving motor is fixed on one side of the outer wall of the mixing box through an installation table, one end of the mixing box, far away from the driving motor, is rotatably connected with the left side of the inner wall of the mixing box through a bearing, a plurality of stirring blades are equidistantly arranged on two sides of the stirring rod, the top of the mixing box is communicated with the bottom of a feeding hopper, and the bottom of the mixing box is communicated with the top of the barrel body;
the bottom of the right side of the barrel body is communicated with one end of an exhaust pipe, one end of the exhaust pipe, far away from the barrel body, is communicated with the bottom of a disinfection box, the disinfection box is arranged on one side of the outer wall of the barrel body, an air pump is arranged at the bottom of the inner wall of the disinfection box, the input end of the air pump is communicated with one end of the exhaust pipe, far away from the barrel body, the output end of the air pump is communicated with the bottom of a first exhaust pipe, a filtering component for treating waste gas is arranged in the disinfection box, and the top of the disinfection box is communicated with the bottom of a second exhaust pipe;
staving bottom central point department and blow off pipe top intercommunication, blow off pipe bottom extends to the staving below, staving bottom four corners is equipped with the supporting leg that improves device stability.
As a further aspect of the present invention: the air inlet has been seted up to staving left side bottom, air inlet one end with intake pipe right-hand member intercommunication, the gas outlet has been seted up to staving right side bottom, gas outlet one end with the exhaust tube is kept away from disinfect box one end intercommunication, staving bottom central point puts the department and has seted up the drain, the drain bottom with the drain top intercommunication.
As a further aspect of the present invention: the staving inner wall both sides correspond and are equipped with the location shell, and the location shell is close to one side each other and has seted up the spout, and the inside slip of spout is equipped with the slider, the slider be close to one side each other with the shower both ends are connected.
As a further aspect of the present invention: the outer wall of the driving motor is provided with a protective shell, and the protective shell is fixed on one side of the outer wall of the mixing box.
As a further aspect of the present invention: the water inlet pipe is arranged at the center of the top of the mixing box, the top of the water inlet pipe is communicated with the bottom of the feeding hopper, the water outlet pipe is arranged at the center of the bottom of the mixing box, and the bottom of the water outlet pipe is communicated with the top of the water delivery hose.
As a further aspect of the present invention: the filter component comprises a first activated carbon plate and a second activated carbon plate, the first activated carbon plate and the second activated carbon plate are arranged in the disinfection box from bottom to top, and the filter holes in the first activated carbon plate are larger than the filter holes in the second activated carbon plate.
As a further aspect of the present invention: one side of the sterilizing box is movably connected with a box door, and one side of the box door is provided with a handle which is convenient for a worker to hold.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses can carry out effectual desulfurization to waste gas, the first activated carbon board and the second activated carbon board of setting can filter the noxious material in the gas many times, can effectively improve the treatment effect to industrial waste gas, have improved desulphurization unit's work efficiency, can effectively satisfy staff's user demand.
Drawings
Fig. 1 is a three-dimensional view of the present invention.
Fig. 2 is a side view of the present invention.
Fig. 3 is a right side view of the present invention.
Fig. 4 is a schematic structural diagram of the present invention.
Fig. 5 is a schematic structural view of the middle barrel body of the present invention.
Fig. 6 is a schematic structural view of the middle positioning shell of the present invention.
Fig. 7 is a schematic structural diagram of the mixing box of the present invention.
Fig. 8 is a schematic structural view of the sterilization box of the present invention.
Wherein: 1-barrel body; 101-an air inlet; 102-an air outlet; 103-a sewage draining outlet; 2, an electric telescopic rod; 3-positioning the shell; 301-a chute; 302-a slider; 4-a spray pipe; 401-a shower head; 5-water hose; 6, an air inlet pipe; 7-a sewage draining pipe; 8-a mixing box; 801-water inlet pipe; 802-water outlet pipe; 9-feeding a hopper; 10-a drive motor; 100-a protective shell; 11-a stirring rod; 110-stirring blades; 12-a bearing; 13-an air extraction pipe; 14-a disinfection box; 140-a door; 141-a handle; 15-an air pump; 16-a first exhaust pipe; 17-a first activated carbon plate; 18-a second activated carbon plate; 19-a second exhaust pipe; 20-support leg.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-8, in an embodiment of the present invention, a multistage desulfurization device for industrial waste gas includes a barrel 1, a stirring assembly and a filtering assembly:
the left side of the barrel body 1 is communicated with the right end of the air inlet pipe 6, when the desulfurization device is used, waste gas is introduced into the barrel body 1 along the air inlet pipe 6 by a worker, the barrel body 1 is internally provided with a spray pipe 4, two ends of the top of the spray pipe 4 are connected with the output end of an electric telescopic rod 2, the electric telescopic rods 2 are correspondingly arranged on two sides of the top of the inner wall of the barrel body 1, two ends of the spray pipe 4 are slidably connected with two sides of the inner wall of the barrel body 1, the bottom of the spray pipe 4 is communicated with the tops of a plurality of spray heads 401 which are arranged at equal intervals, the central position of the top of the spray pipe 4 is communicated with the bottom of a water delivery hose 5, the top of the water delivery hose 5 is communicated with the bottom of a mixing box 8, the mixing box 8 is arranged on the top of the barrel body 1, the worker starts the electric telescopic rod 2, the electric telescopic rod 2 drives the spray pipe 4 to slide downwards, liquid medicine entering the interior of the spray pipe 4 can be sprayed to the waste gas along the spray heads 401, and can effectively desulfurize the waste gas;
the inside stirring subassembly that is equipped with the intensive mixing to the liquid medicine of mixing box 8, the stirring subassembly includes setting up the puddler 11 in mixing box 8 inside, puddler 11 one end runs through mixing box 8 and extends to mixing box 8 outside and be connected with driving motor 10 output, driving motor 10 is fixed in mixing box 8 outer wall one side through the mount table, mixing box 8 keeps away from driving motor 10 one end and is connected with mixing box 8 inner wall left side rotation through bearing 12, puddler 11 is located inside both sides equidistance of mixing box 8 and is equipped with a plurality of stirring vane 110, mixing box 8 top and income hopper 9 bottom intercommunication, mixing box 8 bottom with staving 1 top intercommunication, the staff pours into liquid medicine and water into mixing box 8 along going into hopper 9 in advance inside, start driving motor 10, driving motor 10 drives puddler 11 and rotates, the stirring vane 110 that sets up in puddler 11 both sides can carry out intensive mixing to liquid medicine and water, the liquid medicine is conveyed to the interior of the spray pipe 4 along the water conveying hose 5;
the bottom of the right side of the barrel body 1 is communicated with one end of an air pumping pipe 13, one end, far away from the barrel body 1, of the air pumping pipe 13 is communicated with the bottom of a disinfection box 14, the disinfection box 14 is arranged on one side of the outer wall of the barrel body 1, an air pump 15 is arranged at the bottom of the inner wall of the disinfection box 14, the input end of the air pump 15 is communicated with one end, far away from the barrel body 1, of the air pumping pipe 13, the output end of the air pump 15 is communicated with the bottom of a first exhaust pipe 16, a filtering component for treating waste gas is arranged inside the disinfection box 14, the top of the disinfection box 14 is communicated with the bottom of a second exhaust pipe 19, a worker starts the air pump 15, the air pump 15 can pump the gas inside the barrel body 1 to the inside of the first exhaust pipe 16 along the air pumping pipe 13, and the gas entering the first exhaust pipe 16 enters the disinfection box 14;
1 bottom central point of staving puts department and 7 top intercommunications of blow off pipe, and the waste material of production can be along 7 inside the discharge staving of blow off pipe 1, and 7 bottoms of blow off pipe extend to 1 below of staving, 1 bottom four corners of staving is equipped with the supporting leg 20 that improves device stability, and the supporting leg 20 of setting can improve desulphurization unit's stability, and the practicality is stronger.
An air inlet 101 is formed in the bottom of the left side of the barrel body 1, one end of the air inlet 101 is communicated with the right end of the air inlet pipe 6, an air outlet 102 is formed in the bottom of the right side of the barrel body 1, one end of the air outlet 102 is communicated with one end, away from the sterilizing box 14, of the exhaust pipe 13, a sewage outlet 103 is formed in the center of the bottom of the barrel body 1, and the bottom of the sewage outlet 103 is communicated with the top of the sewage pipe 7.
The corresponding location shell 3 that is equipped with in 1 inner wall both sides of staving, location shell 3 are close to one side each other and have been seted up spout 301, and the inside slip of spout 301 is equipped with slider 302, slider 302 be close to one side each other with 4 both ends of shower are connected, and when 4 downstream of shower, the slider 302 of being connected with 4 both ends of shower can slide along spout 301, and the practicality is stronger.
The outer wall of the driving motor 10 is provided with a protective shell 100, the driving motor 10 can be effectively protected by the protective shell 100, the service life of the driving motor 10 is prolonged, the practicability is high, and the protective shell 100 is fixed on one side of the outer wall of the mixing box 8.
A water inlet pipe 801 is arranged at the center of the top of the mixing box 8, the top of the water inlet pipe 801 is communicated with the bottom of the feeding hopper 9, a water outlet pipe 802 is arranged at the center of the bottom of the mixing box 8, and the bottom of the water outlet pipe 802 is communicated with the top of the water delivery hose 5.
The filter component comprises a first activated carbon plate 17 and a second activated carbon plate 18, the first activated carbon plate 17 and the second activated carbon plate 18 are arranged from bottom to top inside the disinfection box 14, the filtering holes in the first activated carbon plate 17 are larger than the filtering holes in the second activated carbon plate 18, the arranged first activated carbon plate 17 and the second activated carbon plate 18 can filter toxic substances in gas for many times, the treatment effect on industrial waste gas can be effectively improved, the working efficiency of the desulfurization device is improved, and the use requirements of workers can be effectively met.
The sterilizing box 14 is movably connected with the box door 140 on one side, the handle 141 which is convenient for a worker to hold is arranged on one side of the box door 140, the box door 140 can be opened and closed quickly by the arranged handle 141, and the sterilizing box is easy to operate, convenient to use and high in practicability.
The utility model discloses a theory of operation is: when the waste gas desulfurization device is used, waste gas is introduced into the barrel body 1 along the gas inlet pipe 6 by a worker, the worker injects liquid medicine and water into the mixing box 8 along the feeding hopper 9 in advance, the driving motor 10 is started, the driving motor 10 drives the stirring rod 11 to rotate, the stirring blades 110 arranged at two sides of the stirring rod 11 can fully mix the liquid medicine and the water, the liquid medicine is conveyed into the spraying pipe 4 along the water conveying hose 5, the electric telescopic rod 2 is started, the electric telescopic rod 2 drives the spraying pipe 4 to slide downwards, the liquid medicine entering the spraying pipe 4 can spray the waste gas along the spraying head 401, effective desulfurization can be carried out on the waste gas, the generated waste can be discharged out of the barrel body 1 along the blow-off pipe 7, then the gas pump 15 is started, the gas pump 15 can pump the gas in the barrel body 1 along the exhaust pipe 13 into the first exhaust pipe 16, and the gas entering the first exhaust pipe 16 enters the disinfection box 14, the first activated carbon board 17 and the second activated carbon board 18 that set up can filter the noxious material in the gas many times, can effectively improve the treatment effect to industrial waste gas, have improved desulphurization unit's work efficiency, can effectively satisfy staff's user demand.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention.

Claims (7)

1. The utility model provides a multistage desulphurization unit is used to industrial waste gas, includes staving (1), stirring subassembly and filtering component, its characterized in that:
the left side of the barrel body (1) is communicated with the right end of the air inlet pipe (6), a spray pipe (4) is arranged inside the barrel body (1), two ends of the top of the spray pipe (4) are connected with the output end of an electric telescopic rod (2), the electric telescopic rod (2) is correspondingly arranged on two sides of the top of the inner wall of the barrel body (1), two ends of the spray pipe (4) are slidably connected with two sides of the inner wall of the barrel body (1), the bottom of the spray pipe (4) is communicated with the tops of a plurality of spray heads (401) which are arranged at equal intervals, the central position of the top of the spray pipe (4) is communicated with the bottom of a water delivery hose (5), the top of the water delivery hose (5) is communicated with the bottom of a mixing box (8), and the mixing box (8) is arranged on the top of the barrel body (1);
the inside stirring subassembly that is equipped with the intensive mixing to the liquid medicine of mixing box (8), the stirring subassembly is including setting up puddler (11) in mixing box (8) inside, puddler (11) one end runs through mixing box (8) and extends to mixing box (8) outside and be connected with driving motor (10) output, driving motor (10) are fixed in mixing box (8) outer wall one side through the mount table, driving motor (10) one end is kept away from in mixing box (8) and is passed through bearing (12) and mixing box (8) inner wall left side and rotate and be connected, puddler (11) are located mixing box (8) inside both sides equidistance and are equipped with a plurality of stirring vane (110), mixing box (8) top and income hopper (9) bottom intercommunication, mixing box (8) bottom with staving (1) top intercommunication;
the bottom of the right side of the barrel body (1) is communicated with one end of an exhaust pipe (13), one end, far away from the barrel body (1), of the exhaust pipe (13) is communicated with the bottom of a disinfection box (14), the disinfection box (14) is arranged on one side of the outer wall of the barrel body (1), an air pump (15) is arranged at the bottom of the inner wall of the disinfection box (14), the input end of the air pump (15) is communicated with one end, far away from the barrel body (1), of the exhaust pipe (13), the output end of the air pump (15) is communicated with the bottom of a first exhaust pipe (16), a filtering assembly for treating waste gas is arranged inside the disinfection box (14), and the top of the disinfection box (14) is communicated with the bottom of a second exhaust pipe (19);
staving (1) bottom central point department of putting communicates with blow off pipe (7) top, and blow off pipe (7) bottom extends to staving (1) below, staving (1) bottom four corners is equipped with supporting leg (20) that improve device stability.
2. The multistage desulphurization device for industrial waste gas according to claim 1, wherein the bottom of the left side of the barrel body (1) is provided with an air inlet (101), one end of the air inlet (101) is communicated with the right end of the air inlet pipe (6), the bottom of the right side of the barrel body (1) is provided with an air outlet (102), one end of the air outlet (102) is communicated with one end of the exhaust pipe (13) far away from the disinfection box (14), the central position of the bottom of the barrel body (1) is provided with a sewage draining outlet (103), and the bottom of the sewage draining outlet (103) is communicated with the top of the sewage draining pipe (7).
3. The multistage desulphurization device for industrial waste gas according to claim 1, wherein the positioning shells (3) are correspondingly arranged on two sides of the inner wall of the barrel body (1), the sliding groove (301) is formed on one side of the positioning shells (3) close to each other, the sliding block (302) is slidably arranged in the sliding groove (301), and one side of the sliding block (302) close to each other is connected with two ends of the spray pipe (4).
4. The multistage desulfurization apparatus for industrial waste gas according to claim 1, characterized in that the outer wall of the driving motor (10) is provided with a protective shell (100), and the protective shell (100) is fixed on the outer wall side of the mixing box (8).
5. The multistage desulphurization device for industrial waste gas according to claim 1, wherein a water inlet pipe (801) is arranged at the center of the top of the mixing tank (8), the top of the water inlet pipe (801) is communicated with the bottom of the feeding hopper (9), a water outlet pipe (802) is arranged at the center of the bottom of the mixing tank (8), and the bottom of the water outlet pipe (802) is communicated with the top of the water delivery hose (5).
6. The multistage desulfurization device for industrial waste gas according to claim 1, characterized in that the filter assembly comprises a first activated carbon plate (17) and a second activated carbon plate (18), the first activated carbon plate (17) and the second activated carbon plate (18) are arranged inside the sterilization box (14) from bottom to top, and the filter holes of the first activated carbon plate (17) are larger than the filter holes of the second activated carbon plate (18).
7. The multi-stage desulfurization apparatus for industrial waste gas according to claim 1, wherein the sterilization tank (14) is movably connected to a tank door (140) at one side, and a handle (141) for being conveniently held by a worker is provided at one side of the tank door (140).
CN202121218828.6U 2021-06-02 2021-06-02 Multistage desulphurization unit is used to industrial waste gas Expired - Fee Related CN215233185U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121218828.6U CN215233185U (en) 2021-06-02 2021-06-02 Multistage desulphurization unit is used to industrial waste gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121218828.6U CN215233185U (en) 2021-06-02 2021-06-02 Multistage desulphurization unit is used to industrial waste gas

Publications (1)

Publication Number Publication Date
CN215233185U true CN215233185U (en) 2021-12-21

Family

ID=79475561

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121218828.6U Expired - Fee Related CN215233185U (en) 2021-06-02 2021-06-02 Multistage desulphurization unit is used to industrial waste gas

Country Status (1)

Country Link
CN (1) CN215233185U (en)

Similar Documents

Publication Publication Date Title
CN211245915U (en) High-efficient exhaust-gas treatment equipment
CN216540107U (en) Laboratory exhaust purification fume chamber
CN215233185U (en) Multistage desulphurization unit is used to industrial waste gas
CN109465287B (en) Pollute soil processing apparatus
CN215428029U (en) Novel exhaust-gas treatment equipment of environmental protection
CN211836996U (en) Energy-concerving and environment-protective type industrial waste gas treatment device
CN212651565U (en) Dust removal environmental protection equipment
CN212548921U (en) Dodecyl sodium sulfate tail gas processing apparatus
CN212119545U (en) Industrial waste gas treatment device
CN113634109A (en) Waste gas treatment device for reducing vanadium burning return ores of small blast furnace and use method thereof
CN112169520A (en) Efficient chemical machinery tail gas processing apparatus
CN210683408U (en) Chemical sewage and waste gas purification treatment device
CN211069582U (en) Exhaust treatment device for medical consumable production workshop
CN111905556A (en) Waste gas conveying and treating equipment for environmental protection
CN215585865U (en) Waste gas treatment conveying device for environment-friendly equipment
CN214192914U (en) Wastewater treatment device for cleaning and maintaining pollution treatment reaction kettle
CN212760307U (en) Waste residue processing apparatus is used in phenylboronic acid production
CN220125815U (en) Device for purifying waste gas
CN215975365U (en) Waste water recovery device
CN214233354U (en) High-efficient environmental protection's exhaust treatment device
CN221310086U (en) Industrial waste gas spray absorption tower
CN216321058U (en) Reduce small blast furnace vanadium and burn waste gas treatment device for return mine
CN212288248U (en) Tire internal mixer device capable of promoting exhaust gas to be discharged
CN214287385U (en) Energy-concerving and environment-protective type atmosphere pollution exhaust treatment device
CN215782699U (en) Biological deodorization tower device for feed production

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20211221