CN205774285U - The gravity assisted heat pipe heat exchange type ascending tube that a kind of waste heat of coke oven crude gas recycles - Google Patents
The gravity assisted heat pipe heat exchange type ascending tube that a kind of waste heat of coke oven crude gas recycles Download PDFInfo
- Publication number
- CN205774285U CN205774285U CN201620600426.5U CN201620600426U CN205774285U CN 205774285 U CN205774285 U CN 205774285U CN 201620600426 U CN201620600426 U CN 201620600426U CN 205774285 U CN205774285 U CN 205774285U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- exchanger tube
- tube element
- heat
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The gravity assisted heat pipe heat exchange type ascending tube that a kind of waste heat of coke oven crude gas recycles, it relates to a kind of anti-leak alarm device;Upper flange, lower flange is respectively provided at the two ends up and down of cylinder, cylinder inboard wall is provided with inner lining as thermal insulation material, the two ends of heat exchange tube assemblies outer tube pass cylinder connector drum, heat exchange tube assemblies outer tube two ends connect heat exchange tube assemblies intervalve, heat exchange tube assemblies intervalve two ends connect cold medium header and thermal medium header respectively, in heat exchange tube assemblies, pipe two ends are each passed through cold medium header and thermal medium header, and connect cold medium header and thermal medium header, filled media evaporation vapour adapter two ends connect pipe and heat exchange tube assemblies outer tube in heat exchange tube assemblies respectively, filled media condensed fluid adapter two ends connect the pipe other end and the heat exchange tube assemblies outer tube other end in heat exchange tube assemblies respectively, cold medium inlet and thermal medium outlet pipe are separately positioned in cold medium header and thermal medium header, its heat exchange efficiency is high, can find that heat exchange tube assemblies is revealed in time.
Description
Technical field
This utility model relates to the technical field of a kind of coke oven coke oven uprising tube raw coke oven gas waste heat recovery utilizing equipment, is specifically related to
The gravity assisted heat pipe heat exchange type ascending tube that a kind of waste heat of coke oven crude gas recycles.
Background technology
Tedge belongs to an equipment of coke oven, and at present, coking enterprise is general just uses carbonization chamber method to fire this biography of coke
System technique, adds after the coking coal in carbonization chamber is heated and produces substantial amounts of raw coke oven gas, and its temperature is at 650 DEG C--and about 800 DEG C, on
The effect of riser is exactly that the high temperature raw coke oven gas produced by carbonization chamber imports discharge.Each coal chemical enterprise coke production capacity is different, charcoal
The hole count changing room is the most different, and every hole carbonization chamber is designed with a tedge.And the high temperature raw coke oven gas waste heat in numerous tedge
Fail to utilize always, with cyclic ammonia water cooling, heat can only be wasted when importing discharge.
As far back as the seventies in last century, Shoudu Iron and Steel Co, Taiyuan Iron and Steel Co. use chuck tedge, and chuck inner cooling water absorbs entrained by raw coke oven gas
Heat and vaporize generation steam, it is achieved the recycling of heat energy, referred to as " coke oven coke oven uprising tube apparatus for vapour-cooling ", the most once
Used by many coal chemical enterprises, but because numerous reasons the most do not accomplish safe and stable operation, finally have to remove.Beijing coking,
The enterprises such as Wuhan Iron and Steel Plant coking have carried out multinomial improvement in terms of rising body bead structure, welding method, still can not be fully solved
The cylinder weld seam drawing crack of riser, leak, leak the problems such as vapour, run after a period of time eventually because of security of system stability, operating cost
Etc. aspect reason disable one after another.In the last few years, also there were employing hot pipe technique and conduction oil technology to reclaim the remaining of high temperature raw coke oven gas
Heat, but all can not long-period stable operation, subject matter is: these background technologies the most do not overcome the tired of coal oven dithio-gas heat exchange
, there is heat-transfer surface bonding tar in difficulty, and floccule blocks, and heat-transfer surface leaks affects coke oven production, can not send out the very first time after leaking
Existing, the problems such as heat exchange efficiency is poor.Along with the people's further raising to the understanding of importance of high temperature raw coke oven gas waste heat recovery, more come
The most people begin one's study a kind of energy safe and stable reclaim high temperature raw coke oven gas waste heat equipment.
Utility model content
The purpose of this utility model is the defect for prior art and deficiency, it is provided that a kind of simple in construction, heat exchange effect
Rate is high, install, change gravity assisted heat pipe heat exchange type ascending tube that is convenient and that be provided with anti-leak alarm device.
For achieving the above object, the technical solution adopted in the utility model is: a kind of waste heat of coke oven crude gas recycles
Gravity assisted heat pipe heat exchange type ascending tube, it comprise upper flange, cylinder, inner lining as thermal insulation material, heat exchanger tube element outer tube, heat exchanger tube unit
In part intervalve, heat exchanger tube element, pipe, lower flange, pressure alarm, filled media adapter one, filled media house steward, filling are situated between
Matter evaporation vapour adapter, thermal medium outlet pipe, thermal medium header, cold medium header, cold medium inlet, filled media condensed fluid connect
Pipe, filled media adapter two;Upper flange, lower flange are respectively provided at the two ends up and down of cylinder, and cylinder inboard wall is provided with liner thermal insulating material
Material, if inner barrel is provided with and is made up of pipe in Heavenly Stems and Earthly Branches heat exchanger tube element outer tube, heat exchanger tube element intervalve and heat exchanger tube element
Heat exchanger tube element, the two ends of heat exchanger tube element outer tube pass cylinder connector drum, and heat exchanger tube element outer tube two ends connect heat exchange
Tube elements intervalve, heat exchanger tube element intervalve two ends connect cold medium header and thermal medium header, in heat exchanger tube element respectively
Pipe two ends are each passed through cold medium header and thermal medium header, and connect cold medium header and thermal medium header, and filled media is steamed
Sending out vapour adapter two ends and connect pipe and heat exchanger tube element outer tube in heat exchanger tube element respectively, filled media condensed fluid adapter two ends are respectively
Connect the pipe other end and the heat exchanger tube element outer tube other end in heat exchanger tube element, pipe, filled media evaporation vapour in heat exchanger tube element
The annular space that adapter, the adapter of filled media condensed fluid and heat exchanger tube element outer tube and heat exchanger tube element intervalve are formed is connected to one
Rise and form a chamber sealed, be filled with heat-conducting medium, cold medium inlet and thermal medium outlet pipe in closed chamber and set respectively
Put in cold medium header and thermal medium header.
Further, described heat exchanger tube element is provided with filled media adapter one and filled media adapter two, fills and is situated between
Matter adapter one connects filled media house steward, and filled media adapter one is provided with evaporation steam pressure alarm.
Utility model works principle is: heat transferring medium enters in cold medium header by cold medium inlet, by cold Jie
Matter header enters intervalve and the annular space of inner pipe formation of every heat exchanger tube element, the high temperature famine coal of the outer tube outside of heat exchanger tube element
Gas passes through outer tube wall, and the medium heating filled in annular space outer tube and intervalve are formed is allowed to vaporize, after being vaporized
Heat is passed to the heat transfer medium of flowing in the annular space that intervalve and inner pipe are formed not only by intervalve tube wall by filled media,
Filled media after vaporization enters also by filled media evaporation vapour adapter and manages in heat exchanger tube element, and filled media evaporation vapour is changing
During managing flowing from top to down in heat-pipe elements, by tube wall in heat exchanger tube element, heat constantly passed to intervalve
The heat transfer medium of flowing in the annular space formed with inner pipe, filled media evaporation vapour becomes condensed fluid, is filled through medium condensed fluid
Adapter, is again introduced into heat exchanger tube element outer tube and annular space that heat exchanger tube element intervalve is formed, waste by the high temperature of outer tube outside
Heated by gas becomes evaporation vapour, the most constantly circulation, and this operation principle had both been gravity heat-pipe type operation principle;Heat transfer medium is added
After heat by the intervalve of heat exchanger tube element and the formed annular space of inner pipe the other end enter thermal medium header, then by with thermal medium
The thermal medium outlet pipe that header is connected is drawn;Tedge is flowed out, it is achieved the waste heat recovery of raw coke oven gas after raw coke oven gas is cooled
After using said structure, the beneficial effects of the utility model are: it makes heat-transfer surface be not likely to produce bonding tar or wadding
Shape thing blocks, and does not corrodes, because the annular seal space indoor between heat exchanger tube element intervalve and outer tube are filled with Jie that heat conductivity is big
Matter, after filled media is heated, the evaporation certain steam pressure of formation can efficiently control heat exchanger tube element outer tube wall surface temperature, institute
The medium filled becomes evaporation gas after being heated, heat, not only by intervalve tube wall, is passed to intervalve and inner pipe by evaporation vapour
The heat transfer medium of flowing in the annular space formed, evaporation vapour enters in heat exchanger tube element also by filled media evaporation vapour adapter
Pipe, by tube wall in heat exchanger tube element, passes to the heat transfer medium of flowing in the annular space that intervalve and inner pipe are formed by heat,
The effect improving heat transfer efficiency can be played, warning system can be caused to start according to the change of institute's filled media evaporating pressure, rise
To finding that heat exchanger tube is revealed in time, it is to avoid heat transfer medium leaks into the effect of carbonization chamber, solve this area and wish for a long time to solve
Technical problem certainly.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation.
1, upper flange;2, cylinder;3, inner lining as thermal insulation material;4, heat exchanger tube element outer tube;5, heat exchanger tube element intervalve;
6, manage in heat exchanger tube element;7, lower flange;8, pressure alarm;9, filled media adapter one;10, filled media house steward; 11、
Filled media evaporation vapour adapter, 12, thermal medium outlet pipe;13, thermal medium header;14, cold medium header;15, cold medium entrance
Pipe;16, filled media condensed fluid adapter;17, filled media adapter two.
Detailed description of the invention
Embodiment
Referring to shown in Fig. 1, the present embodiment the technical scheme is that the gravity that a kind of waste heat of coke oven crude gas recycles
Heat pipe exchanging type tedge, it comprises upper flange 1, cylinder 2, inner lining as thermal insulation material 3, heat exchanger tube element outer tube 4, heat exchanger tube unit
Pipe 6 in part intervalve 5, heat exchanger tube element, lower flange 7, pressure alarm 8, filled media adapter 1, filled media house steward 10,
Filled media evaporation vapour adapter 11, thermal medium outlet pipe 12, thermal medium header 13, cold medium header 14, cold medium inlet 15,
Filled media condensed fluid adapter 16, filled media adapter 2 17;Upper flange 1, lower flange 7 are separately positioned on up and down the two of cylinder 2
End, constitutes tedge, and tedge cylinder 2 inwall is provided with inner lining as thermal insulation material 3, if being provided with the Heavenly Stems and Earthly Branches by heat exchange in tedge cylinder 2
The heat exchanger tube element of pipe 6 composition, heat exchanger tube element outer tube 4 in tube elements outer tube 4, heat exchanger tube element intervalve 5, heat exchanger tube element
Two ends be connected with cylinder 2 through cylinder 2, two ends and the heat exchanger tube element intervalve 5 of the outer tube 4 of heat exchanger tube element connect respectively
Together, the two ends of heat exchanger tube element intervalve 5 link together with thermal medium header 13 and cold medium header 14 respectively, heat exchange
In tube elements, the upper end of pipe 6 is through thermal medium header 13 being connected with thermal medium header 13, the upper end of heat exchanger tube element outer tube 4,
In heat exchanger tube element, the upper end of pipe 6 is connected with filled media evaporation vapour adapter 11 respectively, and in heat exchanger tube element, the lower end of pipe 6 passes
Cold medium header 14 is also connected with cold medium header 14, the lower end of pipe 6 in the lower end of heat exchanger tube element outer tube 4, heat exchanger tube element
Being connected with filled media condensed fluid adapter 16 respectively, in heat exchanger tube element, pipe 6 evaporates vapour adapter 11, filled media with filled media
The annular space that condensed fluid adapter 16, heat exchanger tube element outer tube 4 are formed with heat exchanger tube element intervalve 5 is joined together to form independence
Sealing chamber, at the medium that filling heat conductivity in annular seal space indoor is big, cold medium inlet 15 and the heat of heat exchanger tube element are situated between
Matter outlet 12 is separately positioned in cold medium header 14 and thermal medium header 13, in heat exchanger tube element outer tube 4 and tedge
Raw coke oven gas contacts, and the heat transfer medium region of heat exchanger tube element and raw coke oven gas region in tedge housing are two separate, envelopes
The space closed.
Described cold medium is entered in cold medium header 14 by cold medium inlet 15, cold medium header 14 be reallocated to
The annular space that in some heat exchanger tube element intervalves 5 and heat exchanger tube element, pipe 6 is formed, then the other end of thus annular space flows to heat
Medium header 13 is collected, and derives through thermal medium outlet pipe 12, and high temperature raw coke oven gas is first with heat exchanger tube in being entered tedge by lower flange 7
Part outer tube 4 contacts, and heat exchanger tube element outer tube 4 is heated by high temperature raw coke oven gas, and by outer tube wall by heat exchanger tube element outer tube 4 He
The medium heating filled in the annular space that heat exchanger tube element intervalve 5 is formed is allowed to vaporize, and the filled media after being vaporized is not only
By heat exchanger tube element intervalve 5 tube wall, heat is passed in heat exchanger tube element intervalve 5 and heat exchanger tube element in pipe 6 annular space
The heat transfer medium of flowing, the filled media after vaporization enters pipe 6 in heat exchanger tube element also by filled media evaporation vapour adapter 11,
By pipe 6 tube wall in heat exchanger tube element, heat is passed to what pipe 6 in heat exchanger tube element intervalve 5 and heat exchanger tube element was formed
The heat transfer medium of flowing in annular space, is formed by pipe 6 in heat exchanger tube element intervalve 5 and heat exchanger tube element after heat transfer medium is heated
The other end of annular space enter thermal medium header 13, then drawn by the thermal medium outlet pipe 12 being connected with thermal medium header 13;Waste
Coal gas flows out through upper flange 1 after being lowered the temperature.
Described filled media is filled through medium house steward 10 and enters filled media adapter 1, is filled through medium adapter 1 and enters
Enter by the annular space formed between heat exchanger tube element outer tube 4 and heat exchanger tube element intervalve 5, more thus annular space is filled through medium steaming
Send out pipe 6 in vapour adapter 11 entrance heat exchanger tube element, pipe 6 in heat exchanger tube element enter filled media condensed fluid adapter 16, then by
Filled media condensed fluid adapter 16 enters the annular space formed between heat exchanger tube element outer tube 4 and heat exchanger tube element intervalve 5, fills out
The effects such as aerofluxus are played in filling medium adapter 2 17, are provided with filled media evaporation steam pressure alarm in filled media adapter 1
8。
Described filled media can be water, steam or their mixture, it is also possible to is other gases or liquid
Do not produce chemistry or the physical change such as oxidation, corrosion under body, and high temperature with heat-transfer surface, be stable Jie under heat transfer conditions
Matter.
Described heat exchanger tube element can arrange radical as required.
Described heat exchanger tube element arrangement mode in tedge can be arbitrary.
The present embodiment have the beneficial effect that it can make heat-transfer surface be not likely to produce bonding tar or floccule blocking, do not corrode;
It is filled with the medium that heat conductivity is big because of in the annular space that formed between heat exchanger tube element intervalve 5 and heat exchanger tube element outer tube 4,
The effect improving heat transfer efficiency can be played, meanwhile, can effectively control heat exchanger tube by the change of filled media evaporation steam pressure
The wall surface temperature of element outer tube 4;It addition, the medium filled in this annular space forms gas after being heated is referred to as evaporating vapour, positive reason
The pressure evaporating vapour under condition is stable, and when intervalve damages, the heat transfer medium that pressure is higher can enter in heat exchanger tube element
Between annular space between pipe 5 and heat exchanger tube element outer tube 4, cause the rising of the evaporation steam pressure of institute's filled media, make this ring of monitoring
In gap, the pressure alarm 8 of gas pressure starts, and operative employee can be according to reporting to the police to judge it is which platform tedge heat exchanger at once
There is a problem, immediately the heat transfer medium terminal valve of this tedge heat exchanger is turned off, it is to avoid heat transfer medium leaks into
Carbonization chamber;When outer tube damages, because managing outer raw coke oven gas pressure less than institute's filled media in the annular space of intervalve and outer tube formation
Evaporation steam pressure, therefore, the evaporation vapour of institute's filled media can spill, and in making monitoring annular space, evaporation steam pressure alarm 8 system opens
Dynamic, equally, operative employee also can quickly judge it is which platform tedge heat exchanger is out of joint, and takes measures it, solves
This area wishes to solve the technical problem that for a long time.
The above, be merely to illustrate the technical solution of the utility model and unrestricted, those of ordinary skill in the art couple
Other amendment or equivalent that the technical solution of the utility model is made, without departing from technical solutions of the utility model
Spirit and scope, all should contain in the middle of right of the present utility model.
Claims (2)
1. the gravity assisted heat pipe heat exchange type ascending tube that waste heat of coke oven crude gas recycles, it comprises upper flange, cylinder, liner
Pipe, lower flange, pressure alarm in insulation material, heat exchanger tube element outer tube, heat exchanger tube element intervalve, heat exchanger tube element, fill out
Filling medium adapter one, filled media house steward, filled media evaporation vapour adapter, thermal medium outlet pipe, thermal medium header, cold media set
The adapter of case, cold medium inlet, filled media condensed fluid, filled media adapter two;It is characterized in that upper flange, lower flange are respectively
Being located at the two ends up and down of cylinder, cylinder inboard wall is provided with inner lining as thermal insulation material, if outside inner barrel is provided with by Heavenly Stems and Earthly Branches heat exchanger tube element
The heat exchanger tube element that in pipe, heat exchanger tube element intervalve and heat exchanger tube element, pipe is constituted, the two ends of heat exchanger tube element outer tube pass
Cylinder connector drum, heat exchanger tube element outer tube two ends connect heat exchanger tube element intervalve, and heat exchanger tube element intervalve two ends are divided
Not connecting cold medium header and thermal medium header, in heat exchanger tube element, pipe two ends are each passed through cold medium header and thermal medium collection
Case, and connect cold medium header and thermal medium header, filled media evaporation vapour adapter two ends connect respectively manages in heat exchanger tube element
With heat exchanger tube element outer tube, filled media condensed fluid adapter two ends connect the pipe other end and heat exchanger tube unit in heat exchanger tube element respectively
The part outer tube other end, pipe, filled media evaporation vapour adapter, the adapter of filled media condensed fluid and heat exchanger tube element in heat exchanger tube element
The annular space that outer tube and heat exchanger tube element intervalve are formed is joined together to form a chamber sealed, and is filled with in closed chamber
Heat-conducting medium, cold medium inlet and thermal medium outlet pipe are separately positioned in cold medium header and thermal medium header.
The gravity assisted heat pipe heat exchange type ascending tube that a kind of waste heat of coke oven crude gas the most according to claim 1 recycles, its
The heat exchanger tube element being characterised by described is provided with filled media adapter one and filled media adapter two, and filled media adapter one is even
Meeting filled media house steward, filled media adapter one is provided with filled media evaporation steam pressure alarm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201620600426.5U CN205774285U (en) | 2016-06-20 | 2016-06-20 | The gravity assisted heat pipe heat exchange type ascending tube that a kind of waste heat of coke oven crude gas recycles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201620600426.5U CN205774285U (en) | 2016-06-20 | 2016-06-20 | The gravity assisted heat pipe heat exchange type ascending tube that a kind of waste heat of coke oven crude gas recycles |
Publications (1)
Publication Number | Publication Date |
---|---|
CN205774285U true CN205774285U (en) | 2016-12-07 |
Family
ID=58132268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201620600426.5U Active CN205774285U (en) | 2016-06-20 | 2016-06-20 | The gravity assisted heat pipe heat exchange type ascending tube that a kind of waste heat of coke oven crude gas recycles |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN205774285U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106833701A (en) * | 2017-02-24 | 2017-06-13 | 中冶焦耐(大连)工程技术有限公司 | A kind of carbonization chamber furnace top structure of external-heat low order fine coal continuous shale oven |
-
2016
- 2016-06-20 CN CN201620600426.5U patent/CN205774285U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106833701A (en) * | 2017-02-24 | 2017-06-13 | 中冶焦耐(大连)工程技术有限公司 | A kind of carbonization chamber furnace top structure of external-heat low order fine coal continuous shale oven |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN205774284U (en) | The heat exchange type ascending tube that a kind of waste heat of coke oven crude gas recycles | |
CN103756692B (en) | Riser waste heat recovery device for coke oven | |
CN102838996B (en) | Raw coke oven gas waste-heat utilization method and raw coke oven gas waste-heat utilization equipment | |
CN104531173A (en) | Coke oven crude gas riser pipe sensible heat recovery device and coke oven crude gas riser pipe sensible heat recovery method | |
CN104531174A (en) | Coke oven crude gas double-jacket riser pipe sensible heat recovery system and coke oven crude gas double-jacket riser pipe sensible heat recovery method | |
CN205774285U (en) | The gravity assisted heat pipe heat exchange type ascending tube that a kind of waste heat of coke oven crude gas recycles | |
CN204400894U (en) | Raw coke over gas riser heat recovering device | |
CN207347506U (en) | A kind of system for recycling raw coke oven gas waste heat with conduction oil and carrying out ammonia still process | |
CN104479693B (en) | Coke oven crude gas latent heat recovery system and method | |
CN208279557U (en) | A kind of coke oven threeway bridge tube heat exchanger apparatus | |
CN106705729A (en) | Coke oven raw gas ascension pipe heat exchange device | |
CN104728821A (en) | Ascending pipe raw gas waste heat utilizing boiler system | |
CN205403559U (en) | Heat pipe formula waste heat recovery system of anti stick raw coke oven gas | |
CN105605954B (en) | A kind of heat pipe-type residual neat recovering system of anti stick raw coke oven gas | |
CN104214990A (en) | Raw coke oven gas sensible heat recovery cold water preparing system and raw coke oven gas sensible heat recovery cold water preparing method | |
CN102679783A (en) | Raw coke oven gas waste heat recovery method and device | |
CN204786295U (en) | Tedge raw coke oven gas waste heat utilization boiler system | |
CN208238604U (en) | A kind of raw coke over gas riser heat-exchanger rig | |
CN106642456A (en) | Natural cold source cold-storage device capable of being quickly assembled and disassembled | |
CN208292922U (en) | A kind of waste heat of coke oven crude gas heating rich oil device | |
CN208395096U (en) | A kind of efficient rising heat exchange of heat pipe for preventing tar from hanging knot | |
CN202630761U (en) | Waste heat utilization device of raw coke oven gas of coke oven | |
CN107794062A (en) | A kind of kestner long-tube evaporator for reclaiming semi-coke quenching waste heat | |
CN205709867U (en) | A kind of industrial sulphuric acid purifying plant | |
CN207659377U (en) | A kind of hot semicoke cooling system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |