CN209352940U - A kind of blast furnace cinder takes hot systems - Google Patents
A kind of blast furnace cinder takes hot systems Download PDFInfo
- Publication number
- CN209352940U CN209352940U CN201920045052.9U CN201920045052U CN209352940U CN 209352940 U CN209352940 U CN 209352940U CN 201920045052 U CN201920045052 U CN 201920045052U CN 209352940 U CN209352940 U CN 209352940U
- Authority
- CN
- China
- Prior art keywords
- fused salt
- heat collector
- blast furnace
- heat
- heat exchanger
- 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
- 239000003818 cinder Substances 0.000 title claims abstract description 17
- 150000003839 salts Chemical class 0.000 claims abstract description 107
- 239000007788 liquid Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000009826 distribution Methods 0.000 claims abstract description 8
- 230000008676 import Effects 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- XYFCBTPGUUZFHI-UHFFFAOYSA-N Phosphine Chemical compound P XYFCBTPGUUZFHI-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to blast furnace process dross sensible heats to utilize technical field, and specifically a kind of blast furnace cinder takes hot systems.Including heat collector, fused salt tank, pump for liquid salts and pipe heat exchanger, heat collector, fused salt tank, pump for liquid salts and pipe heat exchanger shell side the closed loop to be formed and be circulated for fused salt is sequentially connected with by conduit, the tube side import of pipe heat exchanger is connected with water pot, and tube side outlet is connected with outside ductwork；Pump for liquid salts is two-way pump, conduit tilt distribution between pipe heat exchanger and heat collector is so that the fused salt in pipe heat exchanger can be from inflow heat collector, conduit tilt distribution between heat collector and fused salt tank is so that the fused salt in heat collector can be additionally provided with electric heater from flowing into fused salt tank in fused salt tank.The problem of the utility model can solve to waste great lot of water resources in blast furnace cinder processing, environmental pollution, recuperation of heat grade and inefficiency.
Description
Technical field
The utility model relates to blast furnace process dross sensible heats to utilize technical field, and specifically a kind of blast furnace cinder takes heat
System.
Background technique
In recent years Chinese Metallurgical Industry Development is rapid, and pig iron yield accounts for 50% of Gross World Product or more；Chinese metallurgy industry energy simultaneously
Consumption rate is very high, there is the huge energy saving space and market potential.As iron and steel enterprise is energy-saving, comprehensive utilization of resources is horizontal not
Disconnected to improve, energy industry structure changes, reinforce optimized utilizing energy, develop a circular economy, residual heat and energy is using having become
The trend of development of iron and steel enterprises.
About 800,000,000 tons of China's steel production capacity at present, the annual blast furnace slag for generating about 300,000,000 tons 1400-1500 DEG C, blast furnace slag are taken away
Physical thermal account for ironmaking energy consumption 8% or so, be about as much as 22,400,000 tons of mark coals (by steel mark consumption of coal, 350 kg/t iron meters
It calculates).
China's blast furnace cinder almost all carries out residues processing technique of quenching using water, consumes a large amount of new water resource, will be hot
Amount is transferred in pulp water and the weary steam of flushing cinder, and can produce during flushing cinder containing sulfur dioxide, hydrogen sulfide, hydrogen phosphide gas
Body, serious to environmental disruption, low-grade heat is difficult to be utilized.
China is the first Chan Gang big country in the world, and is the serious deficient country of resource (water resource), the energy in the world,
Though there is part washing slag water heat for taking hot heating now, heat utilization ratio is lower.
Under the influence of environmental policy, sufficiently development and utilization waste heat, complementary energy, raising UTILIZATION OF VESIDUAL HEAT IN grade have been become common practise.It opens
Open up blast-furnace slag residual heat integrative recovery and utilization technology, and needs more more urgent than developed country.It is also China more than the coming years
One of the emphasis direction of heat comprehensive utilization.
Utility model content
The utility model is intended to provide a kind of blast furnace cinder and takes hot systems, to solve to waste a large amount of water in blast furnace cinder processing
The problem of resource, environmental pollution, recuperation of heat grade and inefficiency.
In order to solve the above technical problems, the technical solution adopted in the utility model are as follows: a kind of blast furnace cinder takes hot systems,
Including heat collector, fused salt tank, pump for liquid salts and pipe heat exchanger, heat collector, fused salt tank, pump for liquid salts and pipe heat exchanger shell
Journey is sequentially connected with the closed loop to be formed and be circulated for fused salt, tube side import and the water pot phase of pipe heat exchanger by conduit
Even, tube side outlet is connected with outside ductwork；Heat collector includes two pieces of concave surfaces corresponding concave surface heat-conducting plate being distributed up and down, and two pieces of concave surfaces are led
The outer rim of hot plate is fixedly connected by welding manner, and the concave surface of two pieces of concave surface heat-conducting plates, which is collectively formed, absorbs blast furnace cinder for fused salt
Radiant temperature takes hot chamber, be also equipped at intervals on underlying one piece of concave surface heat-conducting plate it is multiple for heat collector blast furnace row
The traveling wheel slided in slag runner；Pump for liquid salts is two-way pump, and the conduit tilt distribution between pipe heat exchanger and heat collector is so that pipe
Fused salt in formula heat exchanger can be from flowing into heat collector, and the conduit tilt distribution between heat collector and fused salt tank is so that in heat collector
Fused salt can from flow into fused salt tank in, electric heater is additionally provided in fused salt tank.
Preferably, concave surface heat-conducting plate is made of high-temperature steel plate material.
Preferably, the angle between the conduit and horizontal plane between pipe heat exchanger and heat collector is 20-45 °；Heat collector
The angle between conduit and horizontal plane between fused salt tank is 20-45 °.
Preferably, service valve is respectively equipped in the inlet and outlet of fused salt tank.
Beneficial effect
Fused salt in the utility model heat collector can efficient absorption blast furnace cinder heat, and be recycled to tubular type in fused salt and change
By the heat transfer water supply of absorption after hot device, generate high steam be used to generate electricity or as large-scale compressor driving source.To
Effective dross sensible heat that solves recycles hardly possible, in treatment process the problems such as a large amount of waste water resources and pollution environment.It generates simultaneously
Steam be also that enterprise and society bring huge economic benefit, social benefit and environmental benefit.
The utility model in blast furnace tapping process can continuous production steam pass through conduit in blast furnace maintenance down
Being obliquely installed the two-way pump for liquid salts of cooperation can be such that the fused salt in heat collector, pipe heat exchanger and conduit passes back into fused salt tank, keep away
Fused salt frozen plug in equipment and conduit is exempted from.It, can be by the electric heater that is arranged in fused salt tank after blast furnace again deslagging
By the fused salt heating and melting of solidification, to restart fused salt in the shell side of heat collector, fused salt tank, pump for liquid salts and pipe heat exchanger
In circulate, continue absorb slag heat production steam.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic cross-section of heat collector part in the utility model；
Marked in the figure: 1, blast furnace, 2, trough, 3, heat collector, 301, concave surface heat-conducting plate, 302, traveling wheel, 4, conduit, 5,
Pipe heat exchanger, 6, pump for liquid salts, 7, service valve, 8, fused salt tank.
Specific embodiment
As shown in Figure 1, a kind of 1 slag of blast furnace of the utility model takes hot systems, including heat collector 3, fused salt tank 8, fused salt
Pump 6, the industrial fused salt of pipe heat exchanger 5 and fusing point at 140 DEG C or so.Fused salt heat collector 3, fused salt tank 8, pump for liquid salts 6 and
The shell side of pipe heat exchanger 5 is sequentially connected with to form closed loop by conduit 4, and conduit 4 is the flexibility made of metal material
Pipe, 400-1000 DEG C of heatproof；Pump for liquid salts 6 is made of resistance to fused salt corrosion material, and 400-1000 DEG C of heatproof.Heat collector 3 therein
It is arranged in the trough 2 of blast furnace 1, fused salt can circulate under the action of pump for liquid salts 6 along the closed loop.When fused salt recycles
When flowing in heat collector 3, heated up by the heat that fused salt absorbs slag in trough 2；When fused salt is circulated to pipe type heat transfer
When in the shell side of device 5, the water in 5 tube side of pipe heat exchanger is transferred heat to, then water is heated and generates high steam；Heat release
Fused salt afterwards back and forth circulates in closed loop, persistently handles slag waste heat and produces steam.
Dotted line in Fig. 1 in pipe heat exchanger 5 indicates water route flow trace, the tube side import of pipe heat exchanger 5 and water pot
It is connected, tube side outlet is connected with outside ductwork.Water in water pot utilizes fused salt heat generation high pressure after 5 tube side of pipe heat exchanger
Steam, high steam be external in outside ductwork for generate electricity or other purposes.As shown in Fig. 2, heat collector 3 includes two pieces of concave surfaces or more
The corresponding concave surface heat-conducting plate 301 being distributed and made of high-temperature steel plate material, can work normally under the conditions of -10-1500 DEG C.
The outer rim of two pieces of concave surface heat-conducting plates 301 is fixedly connected by welding manner, and confession is collectively formed in the concave surface of two pieces of concave surface heat-conducting plates 301
Fused salt absorption 1 slag radiant temperature of blast furnace takes hot chamber, is also equipped at intervals on underlying one piece of concave surface heat-conducting plate 301 more
A traveling wheel 302 slided in the trough 2 of blast furnace 1 for heat collector 3, so that heat collector 3 can flexibly move in trough 2
It is dynamic, in order to which follow-up maintenance is using or by cooling slag discharge trough 2.
In highest order, the setting of heat collector 3 is arranged in interposition, fused salt tank 8 for the setting of pipe heat exchanger 5 in the utility model
In lowest order, so that 4 tilt distribution of conduit between pipe heat exchanger 5 and heat collector 3, leading between heat collector 3 and fused salt tank 8
4 tilt distribution of pipe then makes the fused salt in pipe heat exchanger 5 can be from flowing into heat collector 3, and the fused salt in heat collector 3 can be certainly
It flows into fused salt tank 8.It is molten in pipe heat exchanger 5, heat collector 3 and in corresponding conduit 4 when the maintenance of 1 maintenance down of blast furnace
Salt can pass back into fused salt tank 8 along inclined conduit 4, and the fused salt between pipe heat exchanger 5 and pump for liquid salts 6 in conduit 4 can be by certainly
Stream or the effect of two-way pump for liquid salts 6 pass back into fused salt tank 8, then avoid fused salt and become solid when heated in conduit losing slag
4, in pipe heat exchanger 5 or heat collector 3, the normal use after blast furnace 1 turns back on is influenced.In the present embodiment, pipe heat exchanger 5
Conduit 4 between heat collector 3 and the angle between horizontal plane are 20-45 °；Conduit 4 between heat collector 3 and fused salt tank 8 with
Angle between horizontal plane is 20-45 °.It is additionally provided with electric heater in fused salt tank 8, for that will coagulate after blast furnace 1 turns back on
The fused salt being fixed in fused salt tank 8 melts, and recirculates flowing under the effect of pump for liquid salts 6.It is set respectively in the inlet and outlet of fused salt tank 8
There is service valve 7, avoids flowing out fused salt tank 8 again the other way around during fused salt passes back into fused salt tank 8.
Under the conventional application state of the utility model, pump for liquid salts 6 is opened, and two service valves 7 are in open state, make
Fused salt direction shown in arrow along Fig. 1 under the driving effect of pump for liquid salts 6 is obtained to circulate.Fused salt in heat collector 3 absorbs molten
It heats up and is entered in fluid reservoir after the radiations heat energy of slag, then the shell side by entering pipe heat exchanger 5 in fluid reservoir, in shell side
Heat is discharged to the water in 5 tube side of pipe heat exchanger, so that water is thermally generated high steam.Fused salt after heat release is then gone successively to
Next circulation heat absorption is carried out in heat collector 3.
Under the shutdown of blast furnace 1 or inspecting state, it is first shut off the service valve 7 on 8 right side of fused salt tank in Fig. 1, so that tubular type is changed
Fused salt in hot device 5 and heat collector 3 enters in fused salt tank 8 through the service valve 7 of 5 left end of pipe heat exchanger；It is then shut off left side inspection
It repairs valve 7 and opens the service valve 7 on right side, pump for liquid salts 6 is opened in reversion, so that the fused salt in conduit 4 is along opposite with arrow in Fig. 1
Direction enters fused salt tank 8 through right side service valve 7, finally closes right side service valve 7.
When blast furnace 1 reactivates discharge slag, the electric heater being first turned in fused salt tank 8 melts fused salt, then
I.e. openable two service valves 7 and pump for liquid salts 6, the fused salt after driving is melted continue cycling through flowing, constant absorption slag heat with
Produce steam.
Claims (4)
1. a kind of blast furnace cinder takes hot systems, it is characterised in that: including heat collector (3), fused salt tank (8), pump for liquid salts (6) and pipe
Formula heat exchanger (5), heat collector (3), fused salt tank (8), the shell side of pump for liquid salts (6) and pipe heat exchanger (5) are suitable by conduit (4)
Secondary connection forms the closed loop circulated for fused salt, and the tube side import of pipe heat exchanger (5) is connected with water pot, tube side outlet
It is connected with outside ductwork；Heat collector (3) includes that the corresponding concave surface heat-conducting plate (301) being distributed, two pieces of concave surfaces are thermally conductive up and down for two pieces of concave surfaces
The outer rim of plate (301) is fixedly connected by welding manner, and the concave surface of two pieces of concave surface heat-conducting plates (301) is collectively formed to be absorbed for fused salt
Blast furnace (1) slag radiant temperature takes hot chamber, is also equipped at intervals with multiple confessions on underlying one piece of concave surface heat-conducting plate (301)
The traveling wheel (302) that heat collector (3) slides in the trough (2) of blast furnace (1)；Pump for liquid salts (6) is two-way pump, pipe heat exchanger
(5) conduit (4) tilt distribution between heat collector (3) is so that the fused salt in pipe heat exchanger (5) can be from inflow heat collector (3)
In, conduit (4) tilt distribution between heat collector (3) and fused salt tank (8) is so that the fused salt in heat collector (3) can be from inflow fused salt
In tank (8), electric heater is additionally provided in fused salt tank (8).
2. a kind of blast furnace cinder according to claim 1 takes hot systems, it is characterised in that: concave surface heat-conducting plate (301) uses
The production of high-temperature steel plate material.
3. a kind of blast furnace cinder according to claim 1 takes hot systems, it is characterised in that: pipe heat exchanger (5) and take heat
Conduit (4) between device (3) and the angle between horizontal plane are 20-45 °；Conduit between heat collector (3) and fused salt tank (8)
(4) angle between horizontal plane is 20-45 °.
4. a kind of blast furnace cinder according to claim 1 takes hot systems, it is characterised in that: the inlet and outlet in fused salt tank (8)
It is respectively equipped with service valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920045052.9U CN209352940U (en) | 2019-01-11 | 2019-01-11 | A kind of blast furnace cinder takes hot systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920045052.9U CN209352940U (en) | 2019-01-11 | 2019-01-11 | A kind of blast furnace cinder takes hot systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209352940U true CN209352940U (en) | 2019-09-06 |
Family
ID=67802829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920045052.9U Active CN209352940U (en) | 2019-01-11 | 2019-01-11 | A kind of blast furnace cinder takes hot systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209352940U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041137A (en) * | 2019-12-24 | 2020-04-21 | 孙厚才 | Blast furnace slag heat energy recovery system |
-
2019
- 2019-01-11 CN CN201920045052.9U patent/CN209352940U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111041137A (en) * | 2019-12-24 | 2020-04-21 | 孙厚才 | Blast furnace slag heat energy recovery system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110057201A (en) | Band energy storage efficient waste heat recycling system | |
| CN102787874B (en) | Blast furnace slag waste heat electricity generating device and electricity-generating method | |
| CN106191345B (en) | A kind of converter melts red slag heat recovering device and exhaust heat recovering method | |
| CN209352940U (en) | A kind of blast furnace cinder takes hot systems | |
| CN207935045U (en) | High-efficiency antiscaling thermostatic type waste heat recovery system of air compressor | |
| CN103484580B (en) | Method and device for recovering molten blast furnace slag sensible heat | |
| CN204550636U (en) | A kind of cryogenic waste heat power generation of blast furnace slag quenching water | |
| CN107990740B (en) | The equipment for utilizing blast furnace slag wind quenching granulated particles waste heat for supplying based on flash evaporation technology | |
| CN109595947A (en) | A kind of industrial slags cement sensible heat recovery system and its recovery method | |
| CN205999400U (en) | A kind of converter melts red slag heat recovering device | |
| CN116753505A (en) | Plate-type waste heat boiler device | |
| CN206479046U (en) | smelting furnace waste heat recycling system | |
| CN202808950U (en) | Cold-rolling titanium belt degreasing process device | |
| CN104911296A (en) | Converter coal gas treatment method and system | |
| CN206755123U (en) | The steam generator and its afterheat utilizing system of a kind of Ferrous Metallurgy | |
| CN209495571U (en) | A kind of industrial slags cement sensible heat recovery system | |
| CN203824341U (en) | Solid material cooling system | |
| CN105299609B (en) | High-temperature heat-tube type high-temperature fusion slag steam generator | |
| CN209013771U (en) | A kind of stirring-type high-temperature slag heat-recovering generating plant | |
| CN208982184U (en) | A kind of tedge waste heat Stirling electricity generation system | |
| CN108796155A (en) | Exposure degree energy-saving power generation system and electricity-generating method more than blast furnace discharge yard slag iron water | |
| CN203820804U (en) | System for preheating boiler water by washing blast furnace slag water | |
| CN205079635U (en) | Finned tube cooling water steam heat recovery system | |
| CN208155127U (en) | A kind of bored steam heat exchanger of heat | |
| CN205137395U (en) | High -temperature heat pipe formula high temperature melting furnace sediment steam generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Blast furnace slag heating system Effective date of registration: 20200113 Granted publication date: 20190906 Pledgee: Bank of China Limited Luoyang Station Branch Pledgor: Longhua Science and Technology Group (Luoyang) Co., Ltd. Registration number: Y2020990000043 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200528 Granted publication date: 20190906 Pledgee: Bank of China Limited Luoyang Station Branch Pledgor: LONGHUA TECHNOLOGY GROUP (LUOYANG) Co.,Ltd. Registration number: Y2020990000043 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Blast furnace slag heating system Effective date of registration: 20200528 Granted publication date: 20190906 Pledgee: Bank of China Limited Luoyang Station Branch Pledgor: LONGHUA TECHNOLOGY GROUP (LUOYANG) Co.,Ltd. Registration number: Y2020990000534 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210615 Granted publication date: 20190906 Pledgee: Bank of China Limited Luoyang Station Branch Pledgor: LONGHUA TECHNOLOGY GROUP (LUOYANG) Co.,Ltd. Registration number: Y2020990000534 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |