CN109294650A - A kind of perpendicular stream dehydration treatment equipment of natural gas - Google Patents
A kind of perpendicular stream dehydration treatment equipment of natural gas Download PDFInfo
- Publication number
- CN109294650A CN109294650A CN201811265377.4A CN201811265377A CN109294650A CN 109294650 A CN109294650 A CN 109294650A CN 201811265377 A CN201811265377 A CN 201811265377A CN 109294650 A CN109294650 A CN 109294650A
- Authority
- CN
- China
- Prior art keywords
- plate
- tower body
- natural gas
- gas
- cone
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/106—Removal of contaminants of water
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Drying Of Gases (AREA)
Abstract
The invention discloses a kind of perpendicular stream dehydration treatment equipments of natural gas, including tower body, tower body bottom center is equipped with inlet duct, inlet duct is connected with conveyance conduit, tower body top-side offers exhaust outlet, tower body bottom is arc-shaped, and the separator being located above inlet duct is equipped in tower body, the separator includes the aeroscopic plate of cone-plate and cone-plate two sides；The difference of temperature condition is needed when the present apparatus is using natural gas and aqueous, the dehydration of natural gas is realized using condensing mode, pass through the separator being made of cone-plate and aeroscopic plate, the out of phase water of gas-liquid and natural gas can be made to carry out separating processing, so as to guarantee that the high efficiency of dehydration carries out, and the inlet duct that eddy flow rises can be formed to gas is entered by setting, it ensure that gas can come into full contact with separator, further ensure the effect of dehydration, distinguish conventional single adsorption mode, a large amount of natural gas gas can be carried out continuing processing, improve treatment effeciency.
Description
Technical field
The present invention relates to energy field, the perpendicular stream dehydration treatment equipment of specifically a kind of natural gas.
Background technique
Natural gas refers to a naturally occurring tangential gas in nature, including in atmospheric thermodynamics, hydrosphere and lithosphere it is various from
The gas (including casing-head gas, reservoir gas, gas of mud volcano, coal bed gas and biology generate gas etc.) that right process is formed.And people are long-term
Since general " natural gas " definition, be to be defined from the narrow sense of energy point of view, refer to and naturally contain the hydrocarbon in stratum
The mixture of class and non-hydrocarbon gases.In petroleum geology, it is often referred to casing-head gas and reservoir gas.It is formed based on hydro carbons,
And contain non-hydrocarbon gas.Natural gas is contained in underground porous gap rock stratum, including casing-head gas, reservoir gas, coal bed gas, gas of mud volcano
Gas etc. is generated with biology, is also had on a small quantity for coal seam.It is high-grade fuel and industrial chemicals.Therefore, associated gas or gas well
In the natural gas produced must be separated and be purified before collecting defeated, burning containing excessive moisture and liquid hydrocarbon,
Its moisture content is controlled, dry gas is made.
Conventional dewatering type mainly uses material absorption mode, by gas by water-absorbing material, makes moisture and water suction
Property material combine, to realize the purpose of dehydration, but this mode not can guarantee a large amount of natural gas processing, need often to suction
Water-based material is replaced, and to guarantee dehydration rate, thus causes the reduction for the treatment of effeciency.
Summary of the invention
The purpose of the present invention is to provide a kind of perpendicular stream dehydration treatment equipments of natural gas, to solve to mention in above-mentioned background technique
Out the problem of.
To achieve the above object, the invention provides the following technical scheme:
A kind of perpendicular stream dehydration treatment equipment of natural gas, including tower body, tower body bottom center are equipped with inlet duct, inlet duct connection
There is conveyance conduit, tower body top-side offers exhaust outlet, and tower body bottom is arc-shaped, and is equipped in tower body and is located at inlet duct
The separator of top, the separator include the aeroscopic plate of cone-plate and cone-plate two sides, and aeroscopic plate and tower body inner wall are in 60 ° of overturning angles
Installation, cone-plate section are in inverted " V " font, and the cone-plate includes the cold plate and draining plate to fit, the cold plate position
Above draining plate, cold plate is connected with the radiator outside tower body by condensate line；It is equipped with above the separator
Crash panel, crash panel are fixed on cone-plate center of top and in vertically arranged, and two sides are equipped with adsorption plate, the suction at the top of crash panel
The attached plate other end is docked with tower body inner wall sealing, and adsorption plate is used to carry out second dehydration to gas；It is offered on adsorption plate more
A bipyramid hole, bipyramid hole include the air inlet taper hole and outlet taper hole to adsorb the setting of plate thickness direction central symmetry, and in air inlet
The junction of taper hole and outlet taper hole is equipped with water suction filler；
It is equipped with Fan Box on aeroscopic plate, drainage blower is equipped in Fan Box.
As a preferred solution of the present invention: the inlet duct includes open-topped inlet cylinder, inside inlet cylinder in by
Under supreme diameter be gradually increased round table-like, the junction of conveyance conduit and inlet cylinder is located at inlet cylinder bottom, under inlet cylinder
Side is equipped with rotary electric machine, and the output end of rotary electric machine is connected with the rotation axis for protruding into and being arranged in inlet cylinder and coaxially, described
Rotation axis is equipped with several aerofoils, and the aerofoil is trapezoidal plate；Multiple decompression holes for penetrating through its plate body are offered on the aerofoil.
As further preferred embodiment of the invention: the tower body bottom is connected with drainpipe, and drainpipe is in "U" shaped
And it is bonded inlet cylinder installation.
Compared with prior art, temperature is needed when the beneficial effects of the present invention are: the present apparatus is using natural gas and aqueous
The difference of condition is realized the dehydration of natural gas using condensing mode, passes through the separator being made of cone-plate and aeroscopic plate, energy
Enough make the out of phase water of gas-liquid and natural gas carry out separating processing, so as to guarantee that the high efficiency of dehydration carries out, and passes through
The inlet duct that eddy flow rises can be formed to gas is entered by being arranged, and ensure that gas can come into full contact with separator, into one
Step ensure that the effect of dehydration, distinguish conventional single adsorption mode, can carry out continuing processing to a large amount of natural gas gas, mention
High treatment effeciency.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of inlet duct in the present invention.
Fig. 3 is the part-structure sectional view of adsorption plate in the present invention.
1- tower body in figure, 2- inlet duct, 21- inlet cylinder, 22- rotary electric machine, 23- rotation axis, 24- aerofoil, 25- decompression
Hole, 3- conveyance conduit, 4- separator, 41- cone-plate, 411- cold plate, 412- draining plate, 413- radiator, 414- condensate line,
42- aeroscopic plate, 421- Fan Box, 422- drain blower, 5- crash panel, 6- adsorption plate, 61- bipyramid hole, 62- air inlet taper hole, 63-
Outlet taper hole, 64- water suction filler, 7- exhaust outlet, 8- drainpipe.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right" "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Please refer to Fig. 1-3, a kind of perpendicular stream dehydration treatment equipment of natural gas, including tower body 1,1 bottom center of tower body be equipped with into
Device of air 2, inlet duct 2 are connected with conveyance conduit 3, and 1 top-side of tower body offers exhaust outlet 7, and 1 bottom of tower body is in circular arc
Shape, is equipped with the separator 4 being located above inlet duct 2 in tower body 1, and the separator 4 includes 41 two sides of cone-plate 41 and cone-plate
Aeroscopic plate 42, aeroscopic plate 42 and 1 inner wall of tower body install in 60 ° of overturning angles, and 41 section of cone-plate is in inverted " V " font, described
Cone-plate 41 includes the cold plate 411 and draining plate 412 to fit, and the cold plate 411 is located at 412 top of draining plate, cold plate
411 are connected with the radiator 413 outside tower body 1 by condensate line 414；Gas enters elder generation and cone-plate in rear uphill process
41 contacts, make condensate liquid cool down and so that cold plate 411 and draining plate 412 is in low temperature with heat exchange method by radiator 413
Temperature reduction, goes out the elutriation in gas, and under the guiding role of draining plate 412 when state, gas and draining plate 412 contact
It is low downwards to be gathered in bottom in tower body 1, and due to the advantage of 41 its own shape of cone-plate, gas can be made to occur sufficiently with it
Contact, to guarantee effective progress of condensation；The separation of gas-liquid is carried out by separator 4, and ensure that effective dehydration effect
Fruit；Gas after 41 cooled dehydrated of cone-plate after 42 water conservancy diversion of aeroscopic plate by rising；
Crash panel 5 is equipped with above the separator 4, crash panel 5 is fixed on 41 center of top of cone-plate and in vertically arranged, hitting
5 top two sides of plate are equipped with adsorption plate 6, and 6 other end of adsorption plate is docked with the sealing of 1 inner wall of tower body, and adsorption plate 6 is used for gas
Carry out second dehydration；Specifically, offering multiple bipyramid holes 61 on adsorption plate 6, bipyramid hole 61 includes with 6 thickness side of adsorption plate
The air inlet taper hole 62 and outlet taper hole 63 being arranged to central symmetry, and be equipped in the junction of air inlet taper hole 62 and outlet taper hole 63
Absorb water filler 64, and active carbon particle can be used in water suction filler, is selected, is not specifically limited as the case may be herein, gas
In body uphill process, second dehydration is carried out to gas by water suction filler 64 when by bipyramid hole 61, further ensure that
The aridity of gas after device is dehydrated；Bipyramid hole 61 has an aggregation to dissipate again gas when gas enters, is discharged
The effect of hair improves water suction filler 64 for water so that pressure is accelerated and increased to gas flow velocity when contacting with water suction filler 64
Adsorption effect；
Meanwhile the guide effect in order to guarantee gas, it is equipped with Fan Box 421 on aeroscopic plate 42, is equipped with drainage in Fan Box 421
Blower 422, guidance gas moves up when drainage blower 422 works, and the gas being introduced into is avoided to generate since temperature reduces
Sinkage, to ensure that treatment process Methodistic for the gas being continuously introduced into.
During gas enters, in order to avoid gas generates irregular airflow influence gas and cone-plate when rising and hitting
41 come into full contact with, and the inlet duct 2 includes open-topped inlet cylinder 21, inside inlet cylinder 21 in diameter from the bottom to top by
Cumulative big round table-like, the junction of conveyance conduit 3 and inlet cylinder 21 is located at 21 bottom of inlet cylinder, is equipped with below inlet cylinder 21
Rotary electric machine 22, the output end of rotary electric machine 22 are connected with the rotation axis 23 for protruding into and being arranged in inlet cylinder 21 and coaxially, institute
Rotation axis 23 is stated equipped with several aerofoils 24, the aerofoil 24 is trapezoidal plate, during gas is sent into, passes through rotary electric machine 22
It drives rotation axis 23 to rotate, and drives the gas entered to generate spiral air flow by aerofoil 24, so that mitigation of gases is by inlet cylinder 21
The rate of climb into tower body 1, and avoid the mutual shock between gas, to ensure that the abundant of gas and cone-plate 41
Contact；
Specifically, offering multiple decompression holes 25 for penetrating through its plate body on the aerofoil 24, aerofoil is reduced by decompression hole 25
The pressure generated when contacting when 24 work with gas ensures the safe operation of equipment to reduce the vibration of device.
Embodiment 2:
The difference from embodiment 1 is that 1 bottom of tower body is connected with drainpipe 8, drainpipe 8 is in "U" shaped and is bonded air inlet
Cylinder 21 is installed, and the water generated in dehydration is discharged out of tower body 1 by drainpipe 8, and can be with air inlet in discharge process
Cylinder 21 generates heat exchange, to play the effect to cool down in advance to the gas conveyed by inlet cylinder 21, accelerates dehydration efficiency.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (7)
1. a kind of perpendicular stream dehydration treatment equipment of natural gas, including tower body (1), tower body (1) bottom center are equipped with inlet duct (2),
Inlet duct (2) is connected with conveyance conduit (3), and tower body (1) top-side offers exhaust outlet (7), and tower body (1) bottom is in circular arc
Shape is equipped with the separator (4) being located above inlet duct (2) in the tower body (1), which is characterized in that the separator (4) includes
The aeroscopic plate (42) of cone-plate (41) and cone-plate (41) two sides, cone-plate (41) section are in inverted " V " font, cone-plate (41) packet
The cold plate (411) and draining plate (412) to fit is included, the cold plate (411) is located above draining plate (412), cold plate
(411) radiator (413) external positioned at tower body (1) is connected with by condensate line (414).
2. a kind of perpendicular stream dehydration treatment equipment of natural gas according to claim 1, which is characterized in that the aeroscopic plate (42)
It is installed with tower body (1) inner wall in 60 ° of overturning angles.
3. a kind of perpendicular stream dehydration treatment equipment of natural gas according to claim 1, which is characterized in that the separator (4)
Top is equipped with crash panel (5), and crash panel (5) is fixed on cone-plate (41) center of top and in vertically arranged, at the top of crash panel (5)
Two sides are equipped with adsorption plate (6), and adsorption plate (6) other end is docked with the sealing of tower body (1) inner wall；It is opened up on adsorption plate (6)
There are multiple bipyramid holes (61), bipyramid hole (61) include the air inlet taper hole (62) being arranged with adsorption plate (6) thickness direction central symmetry
With outlet taper hole (63), and the junction of air inlet taper hole (62) and outlet taper hole (63) be equipped with water suction filler (64).
4. a kind of perpendicular stream dehydration treatment equipment of natural gas according to claim 1, which is characterized in that the aeroscopic plate (42)
It is equipped with Fan Box (421), drainage blower (422) is equipped in Fan Box (421).
5. a kind of perpendicular stream dehydration treatment equipment of natural gas according to claim 1, which is characterized in that the inlet duct
(2) include open-topped inlet cylinder (21), be gradually increased round table-like, conveying in diameter from the bottom to top inside inlet cylinder (21)
The junction of pipeline (3) and inlet cylinder (21) is located at inlet cylinder (21) bottom, and rotary electric machine is equipped with below inlet cylinder (21)
(22), the output end of rotary electric machine (22) is connected with the rotation axis (23) for protruding into and being arranged in inlet cylinder (21) and coaxially, institute
Rotation axis (23) are stated equipped with several aerofoils (24), the aerofoil (24) is trapezoidal plate.
6. a kind of perpendicular stream dehydration treatment equipment of natural gas according to claim 1, which is characterized in that on the aerofoil (24)
Offer multiple decompression holes (25) for penetrating through its plate body.
7. a kind of perpendicular stream dehydration treatment equipment of natural gas according to claim 1, which is characterized in that tower body (1) bottom
Portion is connected with drainpipe (8), and drainpipe (8) is in "U" shaped and is bonded inlet cylinder (21) installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811265377.4A CN109294650B (en) | 2018-10-29 | 2018-10-29 | Natural gas vertical flow dehydration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811265377.4A CN109294650B (en) | 2018-10-29 | 2018-10-29 | Natural gas vertical flow dehydration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109294650A true CN109294650A (en) | 2019-02-01 |
| CN109294650B CN109294650B (en) | 2020-09-08 |
Family
ID=65158874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811265377.4A Expired - Fee Related CN109294650B (en) | 2018-10-29 | 2018-10-29 | Natural gas vertical flow dehydration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109294650B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354703A (en) * | 2020-10-20 | 2021-02-12 | 江苏吉达机械制造有限公司 | Adjustable three-separation powder separator |
| CN113731128A (en) * | 2021-08-22 | 2021-12-03 | 芜湖中燃城市燃气发展有限公司 | High-efficiency natural gas dehydration treatment device and method |
| CN117965217A (en) * | 2024-04-02 | 2024-05-03 | 内蒙古万瑞天然气有限责任公司 | Separation type natural gas low-temperature separator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101703871A (en) * | 2009-11-06 | 2010-05-12 | 张家港市威孚热能科技有限公司 | External steam-water separator |
| US9944873B1 (en) * | 2016-04-26 | 2018-04-17 | Phil Belveal, Sr. | Add-on system for removing paraffin from a natural gas dehydration system |
| CN108117904A (en) * | 2017-12-28 | 2018-06-05 | 天津良华新能源科技有限公司 | A kind of CNG gas stations gas drier |
-
2018
- 2018-10-29 CN CN201811265377.4A patent/CN109294650B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101703871A (en) * | 2009-11-06 | 2010-05-12 | 张家港市威孚热能科技有限公司 | External steam-water separator |
| US9944873B1 (en) * | 2016-04-26 | 2018-04-17 | Phil Belveal, Sr. | Add-on system for removing paraffin from a natural gas dehydration system |
| CN108117904A (en) * | 2017-12-28 | 2018-06-05 | 天津良华新能源科技有限公司 | A kind of CNG gas stations gas drier |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112354703A (en) * | 2020-10-20 | 2021-02-12 | 江苏吉达机械制造有限公司 | Adjustable three-separation powder separator |
| CN113731128A (en) * | 2021-08-22 | 2021-12-03 | 芜湖中燃城市燃气发展有限公司 | High-efficiency natural gas dehydration treatment device and method |
| CN117965217A (en) * | 2024-04-02 | 2024-05-03 | 内蒙古万瑞天然气有限责任公司 | Separation type natural gas low-temperature separator |
| CN117965217B (en) * | 2024-04-02 | 2024-06-14 | 内蒙古万瑞天然气有限责任公司 | Separation type natural gas low-temperature separator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109294650B (en) | 2020-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109294650A (en) | A kind of perpendicular stream dehydration treatment equipment of natural gas | |
| CN1280522C (en) | Method for removing condensables from natural gas stream | |
| BRPI0819315B1 (en) | Method for using solar energy, microwaves and plasmas to produce a liquid fuel and hydrogen from biomass or mineral coal | |
| CN102174895A (en) | Dust collection and removal device for mine machine excavation working surface | |
| CN109268054A (en) | It is a kind of for underground big cross section, the ventilating and purifying air system in long distance driving face | |
| WO2021208431A1 (en) | Cyclone foam integrated drilling and dust removal device and use method for the device | |
| CN205778643U (en) | A kind of oil-gas exploration gas well gas invades the gas-liquid separation device of retention of excessive fluid | |
| CN108311300A (en) | A kind of oil-water cyclone separator with degassing function | |
| CN102794094B (en) | Rotary spray type filler absorbing device | |
| CN207438556U (en) | Steam boiler and its steam-water separator | |
| CN205095542U (en) | Add ring whirl board separator | |
| CN205199138U (en) | Novel high efficiency vapour and liquid separator | |
| CN203730267U (en) | Oil well pump with gas-liquid separation device | |
| CN205164414U (en) | Wet -type whirlwind water curtain dust collector | |
| CN207056277U (en) | A kind of absorption tower | |
| CN108211725A (en) | A kind of system and device for removing hydrogen sulfide in gas phase and application | |
| CN206581974U (en) | One kind is long to take out the short suction pre- arranging device of gas | |
| CN105289116A (en) | Ring whirlwind plate separator | |
| CN115746929A (en) | Oil-gas separation environmental protection recovery unit with multistage filtration | |
| CN102309916B (en) | Bead-collecting fogging desulfuration and dust collect tower | |
| CN202017517U (en) | Dust collecting and removing device for mechanized heading face of mine | |
| CN205627578U (en) | Dedicated high -efficient tail gas processing apparatus of pitch factory tail gas treatment | |
| CN205347359U (en) | Marsh gas purifies dewatering device | |
| CN202228103U (en) | A moderate air pressure air drilling dedusting system | |
| CN206121945U (en) | A cyclone for growing defeated natural gas line |
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 | ||
| 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: 20200908 Termination date: 20211029 |