CN207941354U - Gas harmful material recovery tower - Google Patents

Gas harmful material recovery tower Download PDF

Info

Publication number
CN207941354U
CN207941354U CN201820168760.7U CN201820168760U CN207941354U CN 207941354 U CN207941354 U CN 207941354U CN 201820168760 U CN201820168760 U CN 201820168760U CN 207941354 U CN207941354 U CN 207941354U
Authority
CN
China
Prior art keywords
gas
tower body
dust
spraying box
material recovery
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
CN201820168760.7U
Other languages
Chinese (zh)
Inventor
刘建民
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.)
Hebei Dongxing Plastic Co Ltd
Original Assignee
Hebei Dongxing Plastic 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 Hebei Dongxing Plastic Co Ltd filed Critical Hebei Dongxing Plastic Co Ltd
Priority to CN201820168760.7U priority Critical patent/CN207941354U/en
Application granted granted Critical
Publication of CN207941354U publication Critical patent/CN207941354U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Treating Waste Gases (AREA)

Abstract

The utility model is related to a kind of gas harmful material recovery towers, including:Tower body, condensing unit, purifier, dust-extraction unit, the tower body side are connected with spraying box, and the tower body, spraying box bottom end are communicated in water tank, and the spraying box top is equipped with air inlet, the tower body top is equipped with gas outlet;Condensing unit is set to inside the water tank close to its top side, for the moisture in draw gas;Dust-extraction unit is set in the tower body, between described filler layer, active carbon filter screen layer, including removes knoisphere, ozone reduction layer, electrostatic precipitation component, frame.The utility model recycles the harmful substance in gas through dust-extraction unit after handling gas purification after being condensed by spray, ensure that the cleanliness factor of discharge gas, has environmental-protection function.

Description

Gas harmful material recovery tower
Technical field
The utility model is related to technical field of environment protection equipment, and in particular to a kind of gas harmful material recovery tower.
Background technology
In chemical industry, synthetic pesticide, dyestuff, oil is metallurgical, has been had along with the discharge of gas in the industry productions such as environmental protection The generation of evil substance, these gas harmful materials are discharged into air, can cause environmental pollution, if it is possible to being harmful in gas Substance is recycled, and the pollution to environment can be mitigated.
Gas harmful material is recycled in the prior art, wherein most harmful substance can only be removed, but can not be right Subtitle substance and dust are purged, and cannot be satisfied the quality requirement of normal air, at the same these long-term tiny particles and Dust can lead to filter net jam, seriously affect purification of the recovery tower to gas harmful material, while not clean air being arranged It runs out and also pollutes environment.
Utility model content
The technical problem to be solved by the present invention is to overcome fine particle and dust in the prior art can not and When remove and will have a direct impact on defect to harmful substance clean-up effect in gas.
For this purpose, a kind of gas harmful material recovery tower of technical solution used, which is characterized in that including:
Tower body, the tower body side are connected with spraying box, and the tower body, spraying box bottom end are communicated in water tank, and The spraying box top is equipped with air inlet, the tower body top is equipped with gas outlet;
Condensing unit is set to inside the water tank close to its top side, for the moisture in draw gas;
By being disposed with airstrainer under upper, active carbon filter screen layer, filling out inside purifier, including the tower body The bed of material, demister;
Dust-extraction unit is set to the tower body inner top, is located above the demister, including remove knoisphere, ozone reduction Layer, electrostatic precipitation component, frame, and it is described except knoisphere, ozone reduction layer are fixedly installed on the frame both sides respectively, it is described quiet Electric precipitation component is equipped with one or more groups of, is respectively arranged at described except knoisphere, two outside of ozone reduction layer.
In order to carry out cooling processing to gas and be filtered to harmful substance in gas, preferred technical solution is institute It includes spray piping, spray head to state spraying box, and described spray piping one end is connected with water circulating pump, and the other end is connected to the spray Head is drenched, the spray head is set as multiple and through spray piping inside the spraying box, and the water circulating pump other end connects In external water source.
In order to adsorb after cold filtration particle larger dust or oily mater in gas, preferred technical solution is institute It states spraying box inner bottom and is additionally provided with filler.
Babinet is discharged in the sewage containing harmful substance in water tank for convenience, preferred technical solution is the storage Liquid level sensor is equipped in water tank, and water tank bottom end side is equipped with electrically operated valve, the liquid level sensor is electrically connected In the electrically operated valve.
It is protected to be likely to occur electrical contact to dust-extraction unit, prevents from that human body is caused to get an electric shock to injure, weaken simultaneously Slow down the flow velocity of air-flow, reduce the speed of nuclear power dust, improves efficiency of dust collection, preferred technical solution is the dust-extraction unit It further include the guard boom for being fixedly installed on the frame and being distributed in two outside of the electrostatic precipitation component.
In order to introduce a gas into air inlet, preferred technical solution is that described air inlet one end pipeline is connected with gas receipts Collection cover, the gas collection cap is interior to be equipped with exhaust fan.
In order to which by purified clean gas discharge line, preferred technical solution is that described gas outlet one end pipeline connects It is connected to air-introduced machine one end, the air-introduced machine other end is connected with discharge duct.
Technical solutions of the utility model have the following advantages that:
1. gas harmful material recovery tower provided by the utility model, tower body side is connected with spraying box, inside tower body Top is equipped with dust-extraction unit, and gas is absorbed after the air inlet on spraying box top enters spray by condensing unit condensation process Moisture in gas, using airstrainer, packing layer, active carbon filter screen layer, demister carry out successively dust particle filtering, The remaining dust of adsorbed gas and oily mater and the peculiar smell in gas is dispelled, then is removed in gas by demister Fog, finishing operation is dust-extraction unit, avoids and is typically directly sprayed electrostatic precipitation again on tower body top and made to human body It is injured at getting an electric shock, the cleanliness factor of discharge gas is ensure that after the processing of the above multilayer process;
2. gas harmful material recovery tower provided by the utility model is equipped with dust-extraction unit, can be by ozone reduction at oxygen Gas has environment-friendly function;Simultaneously equipped with except knoisphere, electrostatic precipitation component, capable of removing in gas containing miscellaneous molecule and Dust improves the cleanliness factor of gas.
3. gas harmful material recovery tower provided by the utility model, water tank top is equipped with condensing unit, ensure that into Enter the aridity of tower body gas.
4. gas harmful material recovery tower provided by the utility model, spraying box is interior to be equipped with filler, can adsorb by spray Particle larger dust and oily mater in gas after leaching cold filtration.
5. gas harmful material recovery tower provided by the utility model, when flowing a gas through dust-extraction unit, the ash in gas Trifle in the world matter induction charging under the magnetic fields that dust-extraction unit is formed, and adsorbed by dust-extraction unit, realize dedusting function.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific implementation mode or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, other drawings may also be obtained based on these drawings.
Fig. 1 is 1 recovery tower overall structure diagram of the utility model embodiment;
Fig. 2 is the structural schematic diagram of dust-extraction unit in Fig. 1;
Fig. 3 is the structural schematic diagram of recovery tower in the utility model embodiment 2;
Fig. 4 is 2 first recovery column working state schematic representation of the utility model embodiment;
Fig. 5 is 1 second recovery column working state schematic representation of the utility model embodiment.
In figure:1. tower body;2. air inlet;3. gas outlet;4. purifier;5. water tank;6. water circulating pump;7. dedusting fills It sets;8. guard boom;9. gas collection cap;10. spraying box;11. condensing unit;12. exhaust gas slot;13. blowback pipeline;1-1. first Recovery tower;1-2. second recovery column;1-11. the first air inlet;1-12. the first gas outlet;1-13. first purifies mouth;1-21. the Two air inlets;1-22. the second gas outlet;1-23. second purifies mouth;3-1. air-introduced machine;3-2. discharge duct;4-1. demister; 4-2. active carbon filter screen layers;4-3. packing layer;4-4. airstrainer;5-1. liquid level sensor;5-2. electrically operated valve;7-1. removing Knoisphere;7-2. ozone reduction layers;7-3. electrostatic precipitation components;7-4. frame;9-1. exhaust fan;10-1. spray pipings;10-2. Spray head;10-3. fillers.
Specific implementation mode
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this practicality Novel protected range.
In figure, " → " schematically indicates the flow direction of gas.
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of gas harmful material recovery tower, which is characterized in that including:
Tower body 1,1 side of the tower body are connected with spraying box 10, and the tower body 1,10 bottom end of spraying box are communicated in storage Water tank 5, and 10 top of the spraying box is equipped with air inlet 2,1 top of the tower body is equipped with gas outlet 3;
Condensing unit 11 is set to 5 inside of the water tank close to its top side, for the moisture in draw gas;
Demister 4-1, active carbon filter screen layer 4- are from top to bottom embedded with inside purifier 4, including the tower body 1 successively 2, packing layer 4-3, airstrainer 4-4;The wherein described demister 4-1 is for removing fog contained in gas;The activity Charcoal filter mesh layer 4-2 is used to dispel the peculiar smell in flue gas, is conducive to gas recycling;Described filler layer 4-3 is used for adsorbed gas In the particle and oily mater that contain;The airstrainer 4-4 filters dust particle;
Dust-extraction unit 7 is set in the tower body 1, between described filler layer 4-3, active carbon filter screen layer 4-2, packet It includes and removes knoisphere 7-1, ozone reduction layer 7-2, electrostatic precipitation component 7-3, frame 7-4, and is described except knoisphere 7-1, ozone reduction layer 7-2 is fixedly installed on the both sides the frame 7-4 respectively, and the electrostatic precipitation component 7-3 is equipped with one or more groups of, is respectively arranged at It is described to remove knoisphere 7-1, two outsides ozone reduction layer 7-2.
In order to carry out cooling processing to gas and be filtered to harmful substance in gas, preferred technical solution is institute It states spraying box 10 and is connected with water circulating pump 6 including spray piping 10-1, the one end spray head 10-2, the spray piping 10-1, separately One end is connected to the spray head 10-2, and the spray head 10-2 is set as multiple and through 10 inside spray tube of the spraying box Road 10-1.
In order to adsorb after cold filtration particle larger dust or oily mater in gas, preferred technical solution is institute It states 10 inner bottom of spraying box and is additionally provided with filler 10-3.
Babinet is discharged in the sewage containing harmful substance in water tank for convenience, preferred technical solution is the storage Liquid level sensor 5-1 is equipped in water tank 5, and 5 bottom end side of the water tank is equipped with electrically operated valve 5-2, the liquid level sensor 5-1 is electrically connected at the electrically operated valve 5-2.
It is protected to be likely to occur electrical contact to dust-extraction unit, prevents from that human body is caused to get an electric shock to injure, weaken simultaneously Slow down the flow velocity of air-flow, reduce the speed of nuclear power dust, improves efficiency of dust collection, preferred technical solution is the dust-extraction unit 7 It further include the guard boom 8 for being fixedly installed on the frame 7-4 and being distributed in two outsides the electrostatic precipitation component 7-3.
In order to introduce a gas into air inlet, preferred technical solution is that 2 one end pipeline of the air inlet is connected with gas receipts Collection cover 9, the gas collection cap 9 is interior to be equipped with exhaust fan 9-1.
In order to which by purified clean gas discharge line, preferred technical solution is that 3 one end pipeline of the gas outlet connects It is connected to the one end air-introduced machine 3-1, the air-introduced machine 3-1 other ends are connected with discharge duct 3-2.
The course of work of the utility model:Gas passes through air inlet 2 by the exhaust fan 9-1 being equipped in gas collection cap 9 Be delivered to spraying box 10, gas in spraying box 10 by cooling, filtration treatment, after filtering in gas the larger dust of particle and Oily mater is adsorbed by filler 10-3;Gas after primary purification will wherein be gone moisture under the action of condensing unit 11 Remove, ensure that into the aridity of gas in tower body, gas by tower body 1 demister 4-1, active carbon filter screen layer 4-2, fill out Bed of material 4-3, filter plate 4-4 carry out dust particle filtering, the remaining dust of adsorbed gas and oily mater and successively to gases In peculiar smell dispelled, then the fog in gas is removed by demister, when the gas after demisting flows through dust-extraction unit, gas In dust impurity under the magnetic fields that dust-extraction unit 7 is formed induction charging, and adsorbed by dust-extraction unit 7, realize dedusting Clean gas is entered gas outlet 3 by function after dedusting, ozone reduction after demister 4-4 is dried, and gas passes through Gas after purifying, drying is discharged the air-introduced machine 3-1 for being set to 3 nozzle of gas outlet, is good for the environment.
Embodiment 2
2 place same as Example 1 of embodiment repeats no more, shown in Figure 3, in order to avoid the purifier in tower body Because adsorption saturation can not continue to purify, the embodiment of the present embodiment is that the tower body 1 is equipped with 2, respectively first Recovery tower 1-1, second recovery column 1-2, the first air inlets of first recovery column 1-1 1-11, the first gas outlet 1-12, first are only Change mouth 1-13, the second recovery column 1-2 and is equipped with the second air inlet 1-21, the second gas outlet 1-22 and the second purification mouth 1- 23, the first recovery column 1-1, each air inlets of second recovery column 1-2, gas outlet and purification mouth are connected with valve, and described the One recovery tower 1-1, the gas outlets second recovery column 1-2 are connect after being summarized by pipeline with escape pipe, the first recovery column 1-1, Second recovery column 1-2 purification mouths are connected to purge pipe after summarizing by pipeline, and the pollutant for purifying mouth discharge is expelled to In exhaust gas slot 12, the present embodiment is switched to air inlet in second recovery column 1-2 by the switching of valve.
As a further improvement, the present embodiment further includes blowback pipeline 13, described 13 one end of blowback pipeline and described first Pipeline connection between the corresponding valve in the gas outlets recovery tower 1-1,13 other end of blowback pipeline and second recovery column 1-2 Pipeline between the corresponding valve in gas outlet connects, and is additionally provided with valve on the blowback pipeline 13, in order to first time Tower 1-1 is received because purifier purification saturation is when being stopped, first recovery column 1-1 is in normal pressure state by purified pollutant Smoothly discharge.
Further for realize automation control, the present embodiment further includes control unit, be electrically connected to each air inlet, Gas outlet and net gas port respective valves.
As shown in figure 4, when equipment is started to work, exhaust fan 9-1 is introduced gas into first recovery column 1-1, and control is single Member control first recovery column the first air inlets of 1-1 1-11, the first gas outlet 1-12 and second recovery column second purify mouth 1-23 Corresponding valve is opened, and the second air inlets of second recovery column 1-2 1-21, the second gas outlet 1-22 and first recovery column first are net To change mouth 1-13 and corresponds to valve closing, the valve that blowback pipeline 13 is equipped with opens certain aperture, ensures that small part of gas passes through, By opening and closing above-mentioned valve, for gas after first recovery column 1-1 purifications, most of gas passes through first recovery column The corresponding valve discharges of the first gas outlets 1-1 1-12, since 13 corresponding valve of blowback pipeline only opens certain aperture, this When only have small portion of gas to be flowed into second recovery column 1-2 by blowback pipeline 13, the gas in second recovery column 1-2 at this time The corresponding pipelines of mouth 1-23 are purified by second recovery column 1-2 second to drain into purified exhaust gas in exhaust gas slot 12.
As shown in figure 5, control unit control second recovery column the second air inlets of 1-2 1-21, the second gas outlet 1-22 and The purification of first recovery column first mouth 1-13 corresponds to valve and opens, and the first air inlets of first recovery column 1-1 1-11, the first gas outlet 1-12 and second recovery column second purify mouth 1-23 and correspond to valve closing, and the valve opening that blowback pipeline 13 is equipped with centainly is opened Degree, ensures that small part of gas passes through, and by opening and closing above-mentioned valve, gas passes through the second air inlets of second recovery column 1-2 Pipeline corresponding to mouthful 1-21 flows into second recovery column 1-2, when gas is after second recovery column 1-2 purifications, most of gas Pipeline is corresponded to by gas outlet 1-22 to emit, and since the valve on blowback pipeline 13 only opens certain aperture, is only had at this time Small portion of gas is flowed by blowback pipeline 13 in first recovery column 1-1, and the gas in first recovery column 1-1 passes through first at this time Recovery tower 1-1 purifications mouth 1-13 is corresponded in pipeline inflow exhaust gas slot 12.
As shown in Figure 4, Figure 5, after by the way that the valve on blowback pipeline 13 is opened certain aperture, ensure from first recovery column The purified gas that the outlet sides 1-1 come out is flowed into second recovery column 1-2 or is come out from the outlet sides second recovery column 1-2 Purified gas can flow in first recovery column 1-1 because being normal pressure state in purification process, in tower, can not ensure Pollutant in purifier is come out, only by the way that the air in another tower to be imported into this tower, allows it in this tower Air-flow is generated, the pollutant on purifier in this tower could be purged out, and flow it into exhaust gas slot 12.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or Among the protection domain that variation is created still in the utility model.

Claims (7)

1. a kind of gas harmful material recovery tower, which is characterized in that including:
Tower body (1), tower body (1) side are connected with spraying box (10), and the tower body (1), spraying box (10) bottom end connect Water tank (5) is passed through, and the spraying box (10) top is equipped with air inlet (2), the tower body (1) top is equipped with gas outlet (3);
It is internal close to its top side to be set to the water tank (5) for condensing unit (11);
It is from top to bottom embedded with demister (4-1), active carbon filter screen successively inside purifier (4), including the tower body (1) (4-2), packing layer (4-3), airstrainer (4-4);
Dust-extraction unit (7) is set to the tower body (1) inner top, is located above the demister (4-1), including remove knoisphere (7- 1), ozone reduction layer (7-2), electrostatic precipitation component (7-3), frame (7-4), and it is described except knoisphere (7-1), ozone reduction layer (7-2) is fixedly installed on the both sides the frame (7-4) respectively, and the electrostatic precipitation component (7-3) is equipped with one or more groups of, difference It is set to described except knoisphere (7-1), two outside of ozone reduction layer (7-2).
2. a kind of gas harmful material recovery tower according to claim 1, which is characterized in that the spraying box (10) includes Spray piping (10-1), spray head (10-2), described spray piping (10-1) one end are connected with water circulating pump (6), and the other end connects It is connected to the spray head (10-2), the spray head (10-2) is set as multiple and through the internal spray tube of the spraying box (10) Road (10-1), water circulating pump (6) other end are connected to external water source.
3. a kind of gas harmful material recovery tower according to claim 2, which is characterized in that the spraying box (10) is internal Bottom end is additionally provided with filler (10-3), the dust or oily mater larger for adsorption particle.
4. a kind of gas harmful material recovery tower according to claim 1, which is characterized in that set in the water tank (5) There is liquid level sensor (5-1), and the water tank (5) bottom end side is equipped with electrically operated valve (5-2), the liquid level sensor (5- 1) it is electrically connected at the electrically operated valve (5-2).
5. a kind of gas harmful material recovery tower according to claim 1, which is characterized in that the dust-extraction unit (7) is also Including the guard boom (8) for being fixedly installed on the frame (7-4) and being distributed on the outside of the electrostatic precipitation component (7-3) two.
6. a kind of gas harmful material recovery tower according to claim 1, which is characterized in that described air inlet (2) one end Pipeline is connected with gas collection cap (9), and exhaust fan (9-1) is equipped in the gas collection cap (9).
7. a kind of gas harmful material recovery tower according to claim 1, which is characterized in that described gas outlet (3) one end Pipeline is connected to the one end air-introduced machine (3-1), and air-introduced machine (3-1) other end is connected with discharge duct (3-2).
CN201820168760.7U 2018-01-31 2018-01-31 Gas harmful material recovery tower Expired - Fee Related CN207941354U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820168760.7U CN207941354U (en) 2018-01-31 2018-01-31 Gas harmful material recovery tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820168760.7U CN207941354U (en) 2018-01-31 2018-01-31 Gas harmful material recovery tower

Publications (1)

Publication Number Publication Date
CN207941354U true CN207941354U (en) 2018-10-09

Family

ID=63699063

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820168760.7U Expired - Fee Related CN207941354U (en) 2018-01-31 2018-01-31 Gas harmful material recovery tower

Country Status (1)

Country Link
CN (1) CN207941354U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109718626A (en) * 2019-02-22 2019-05-07 苏州宝联重工股份有限公司 A kind of coal gas of converter exhaust gas cleaning apparatus
CN112892128A (en) * 2021-01-28 2021-06-04 云南师范大学 Environment-friendly dust removal treatment equipment
CN114054458A (en) * 2021-10-27 2022-02-18 江苏宇星科技有限公司 Iron oxide dust recovery device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109718626A (en) * 2019-02-22 2019-05-07 苏州宝联重工股份有限公司 A kind of coal gas of converter exhaust gas cleaning apparatus
CN112892128A (en) * 2021-01-28 2021-06-04 云南师范大学 Environment-friendly dust removal treatment equipment
CN112892128B (en) * 2021-01-28 2021-11-02 云南师范大学 Environment-friendly dust removal treatment equipment
CN114054458A (en) * 2021-10-27 2022-02-18 江苏宇星科技有限公司 Iron oxide dust recovery device

Similar Documents

Publication Publication Date Title
CN207941354U (en) Gas harmful material recovery tower
CN107998832A (en) Wastewater from chemical industry and exhaust gas are recycled purifier
CN108144411A (en) Environmental protective type chemical waste gas purification apparatus
CN108514802A (en) A kind of environment-friendly type industrial waste-gas purifier
CN205392065U (en) Waste gas dust treatment device
CN205598839U (en) Exhaust gas purification system suitable for laboratory
CN107420956A (en) A kind of environmental protection equipment for kitchen
CN214106179U (en) Asphalt flue gas purification system of asphalt mixing plant
CN202962190U (en) Welding dedusting and purifying device
CN109764426A (en) A kind of air cleaning unit of rinse air
CN208959593U (en) A kind of environment-friendly type industrial waste-gas purifier
CN107126818A (en) A kind of nanometer dust absorption treating device and method
CN206980453U (en) VOC purifier in a kind of flue gas
CN209317446U (en) A kind of device of skid module formula processing VOCs exhaust gas
CN207126310U (en) A kind of catalytic converter
CN207211036U (en) A kind of multi-functional formula garbage recovery device based on wet dedusting
CN109364728A (en) Dyestuff waste gas purification apparatus and method
CN108325320A (en) A kind of rinsing type environmental protection flue gas purifying equipment
CN212701111U (en) Novel exhaust-gas treatment equipment
CN208809691U (en) A kind of environment-friendly type industrial waste-gas purifier
CN210645692U (en) Be used for workshop environmental protection dust remover of moulding plastics
CN208340387U (en) A kind of rinsing type environmental protection flue gas purifying equipment
CN208975437U (en) A kind of exhaust gas environment-friendly processing unit for tin recycling
CN208082106U (en) Water rotation type high-efficiency dust remover
CN106178781B (en) A kind of purifying apparatus of smoke and fume

Legal Events

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: 20181009

Termination date: 20220131

CF01 Termination of patent right due to non-payment of annual fee