CN207936057U - A kind of circulating fluid bed boiler slag cooling equipment - Google Patents
A kind of circulating fluid bed boiler slag cooling equipment Download PDFInfo
- Publication number
- CN207936057U CN207936057U CN201721769920.5U CN201721769920U CN207936057U CN 207936057 U CN207936057 U CN 207936057U CN 201721769920 U CN201721769920 U CN 201721769920U CN 207936057 U CN207936057 U CN 207936057U
- Authority
- CN
- China
- Prior art keywords
- cooling
- babinet
- stock guide
- mentioned
- coolant
- 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
Links
Landscapes
- Furnace Details (AREA)
Abstract
The utility model is related to circulating fluid bed boiler slags to cool down equipment, including babinet, multiple cooling stock guides, collision stage and multiple pushers；Multiple cooling stock guides between the upper and lower every and be staggered on the madial wall of babinet, and one end of each cooling stock guide is connected and fixed with the wherein side inner wall of babinet, and the other end is tilted down towards the opposite other side inner wall of babinet；Collision stage is arranged above cooling stock guide one end of top layer；Pusher includes pushing mechanism and push plate, and pushing mechanism is separately fixed at the position of corresponding cooling stock guide one end on babinet lateral wall, and driving end is stretched into babinet, and push plate is connect with driving end；It is equipped with coolant flow chamber, the external coolant circulation system of coolant flow chamber in cooling stock guide；Cooling coil, the external water-cooling circulating system of cooling coil are embedded in wall box.Advantage：Effectively clinker cooling can be handled, cooling-down effect is preferable, can ensure the smooth delivery of power of clinker.
Description
Technical field
The utility model is related to power plant high temperature furnace slag treatment technology, more particularly to a kind of circulating fluid bed boiler slag is cold
But equipment.
Background technology
After burning in circulating fluid bed boiler, inside generates a large amount of waste residue containing high heat, and it is existing that there is also cokings in waste residue
As.When discharging waste residue must first by waste residue cooling treatment after carry out other processing.
Traditional waste residue uses chiller treatment, and treating capacity is smaller, is easily damaged, less efficient, and heat is not easy back
It receives, effects of energy conservation and environmental protection is bad.
In addition, clinker is easy the accumulated plugging in processing procedure, cause to be unable to smooth delivery of power.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of circulating fluid bed boiler slags to cool down equipment, effectively
The defect for overcoming the prior art.
The technical solution that the utility model solves above-mentioned technical problem is as follows：A kind of cooling of circulating fluid bed boiler slag is set
It is standby, including babinet, multiple cooling stock guides, collision stage and multiple pushers；
The upper end of above-mentioned babinet is equipped with feeding port, and lower end is equipped with slag-drip opening；
Multiple above-mentioned cooling stock guides between the upper and lower every and be staggered on the madial wall of above-mentioned babinet, and it is each above-mentioned cold
But one end of stock guide is connected and fixed with the wherein side inner wall of above-mentioned babinet, and the other end is towards opposite another of above-mentioned babinet
Side inner wall tilts down；
Above-mentioned collision stage be arranged above-mentioned box house and positioned at top layer above-mentioned cooling stock guide one end top, on
Feeding port is stated to be located above above-mentioned collision stage；
Multiple above-mentioned pushers are corresponded with multiple above-mentioned cooling stock guides；
Above-mentioned pusher includes pushing mechanism and push plate, and above-mentioned pushing mechanism is separately fixed on above-mentioned babinet lateral wall
Box house, above-mentioned push plate are stretched into the position of corresponding cooling stock guide one end, driving end across the corresponding side wall of above-mentioned babinet
It is connect with the driving end of above-mentioned pushing mechanism, above-mentioned pushing mechanism can drive above-mentioned push plate along the upper table of corresponding cooling stock guide
Reciprocating linear moves from one end to the other end in face；
Coolant flow chamber is equipped in each above-mentioned cooling stock guide, above-mentioned coolant flow intracavitary has coolant liquid,
And pass through the external coolant circulation system of conduit；
Above-mentioned wall box is double-layer hollow structure, and it is filled with heat-conducting mediums, and are embedded with cooling coil, above-mentioned cold
But the inlet and outlet of coil pipe pass through the external water-cooling circulating system of pipeline respectively.
The utility model has the beneficial effects that：It is simple in structure, it is simple, convenient, effectively clinker cooling can be handled,
Cooling-down effect is preferable, can ensure the smooth delivery of power of clinker, and there is no the situations that poly- heap blocks.
Based on the above technical solution, the utility model can also do following improvement.
Further, above-mentioned collision stage is the stripe board parallel with the above-mentioned cooling stock guide of top layer, is evenly distributed in the upper surface
There is the collision protrusion of multiple tapers.
Advantageous effect using above-mentioned further scheme is that collision stage is arranged in parallel with cooling stock guide, is being touched conducive to falling
It hits the clinker on platform to fall on the cooling deflector of top layer, collides the setting of protrusion and be crushed conducive to the collision of clinker, avoided
The larger internal coking of slag granules causes internal cooling to be not thorough.
Further, the bottom wall of above-mentioned babinet is set as downwardly projecting spherical surface, and above-mentioned slag-drip opening is located at above-mentioned babinet bottom wall
Apex.
Advantageous effect using above-mentioned further scheme is to be conducive to clinker to slide along bottom and be discharged from slag-drip opening.
Further, the lower end of above-mentioned babinet is uniformly provided with multiple support legs.
Advantageous effect using above-mentioned further scheme is that the design so that the bottom of box is hanging, is conducive to deslagging.
Further, the upper end of above-mentioned babinet is equipped at least one gas vent being connected to its inside.
Advantageous effect using above-mentioned further scheme is can to reduce box house air pressure, it is ensured that the inside of babinet it is steady
Fixed and safety.
Further, above-mentioned water-cooling circulating system includes water pump and cooling bay, and the water inlet end of above-mentioned water pump is distinguished by pipeline
It is connected to municipal tap water pipe network and/or cooling bay, water outlet is above-mentioned cold by the water inlet of the above-mentioned cooling coil of pipeline connection
But the water outlet of coil pipe passes through the above-mentioned cooling bay of pipeline connection.
Advantageous effect using above-mentioned further scheme is that entire water-cooling circulating system is simple in structure, convenient in cooling coil
Portion's cooling water circulates, and promotes the cooling of furnace slag to box house.
Further, above-mentioned coolant circulation system includes low-temperature cooling fluid circulating pump and tank for coolant, above-mentioned tank for coolant
It is interior that there is coolant liquid, the liquid feeding end of above-mentioned low-temperature cooling fluid circulating pump and going out for tank for coolant with inlet and liquid outlet
Liquid mouth is connected to, the inlet of the outlet end of above-mentioned low-temperature cooling fluid circulating pump and above-mentioned tank for coolant respectively with it is each above-mentioned cold
But the coolant flow chamber connection in stock guide.
Advantageous effect using above-mentioned further scheme is that coolant circulation system design is simple, rationally, can be quick
Cooled down to the high temperature furnace slag through supercooling stock guide by cooling stock guide, cooling efficiency is higher, and effect is preferable.
Further, above-mentioned pushing mechanism is hydraulic cylinder.
Advantageous effect using above-mentioned further scheme is simple, convenient.
Further, the position of corresponding each above-mentioned cooling stock guide is equipped with one group of high-pressure fog on above-mentioned box inside wall
Mouth, every group of above-mentioned high-pressure fog mouth are equipped with multiple, and are respectively facing corresponding above-mentioned cooling stock guide upper surface spraying, each
Above-mentioned high-pressure fog mouth passes through the external high-pressure cooling water source of pipeline.
Advantageous effect using above-mentioned further scheme is promoted to cooling down the cold of the clinker for slipping over and (rolling across) on stock guide
But effect.
Description of the drawings
Fig. 1 is that the circulating fluid bed boiler slag of the utility model cools down the cross-sectional view of equipment；
Fig. 2 is that the circulating fluid bed boiler slag of the utility model cools down the workflow of coolant circulation system in equipment
Figure.
In attached drawing, parts list represented by the reference numerals are as follows：
1, babinet, 2, cooling stock guide, 3, collision stage, 4, pusher, 5, cooling coil, 6, water pump, 7, cooling bay,
11, feeding port, 12, slag-drip opening, 13, support leg, 14, gas vent, 15, high-pressure fog mouth, 31, collision protrusion, 41, push machine
Structure, 42, push plate.
Specific implementation mode
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining this practicality
It is novel, it is not intended to limit the scope of the utility model.
Embodiment：As illustrated in fig. 1 and 2, the present embodiment circulating fluid bed boiler slag cooling equipment include babinet 1, it is more
A cooling stock guide 2, collision stage 3 and multiple pushers 4；
The upper end of above-mentioned babinet 1 is equipped with feeding port 11, and lower end is equipped with slag-drip opening 12；
Multiple above-mentioned cooling stock guides 2 between the upper and lower every and be staggered on the madial wall of above-mentioned babinet 1, and it is each above-mentioned
One end of cooling stock guide 2 is connected and fixed with the wherein side inner wall of above-mentioned babinet 1, and the other end is towards 1 phase of above-mentioned babinet
To other side inner wall tilt down；
Above-mentioned collision stage 3 is arranged in 1 inside of above-mentioned babinet and positioned at the upper of above-mentioned 2 one end of cooling stock guide of top layer
Side, above-mentioned feeding port 11 are located at 3 top of above-mentioned collision stage；
Multiple above-mentioned pushers 4 are corresponded with multiple above-mentioned cooling stock guides 2；
Above-mentioned pusher 4 includes pushing mechanism 41 and push plate 42, and above-mentioned pushing mechanism 41 is separately fixed at above-mentioned babinet 1
The position of 2 one end of corresponding cooling stock guide on lateral wall, driving end are stretched into across 1 corresponding side wall of above-mentioned babinet in babinet 1
Portion, above-mentioned push plate 42 are connect with the driving end of above-mentioned pushing mechanism 41, and above-mentioned pushing mechanism 41 can drive above-mentioned push plate 42 along right
Reciprocating linear moves from one end to the other end for the upper surface for the cooling stock guide 2 answered；
Coolant flow chamber is equipped in each above-mentioned cooling stock guide 2, above-mentioned coolant flow intracavitary has coolant liquid,
And pass through the external coolant circulation system of conduit；
1 side wall of above-mentioned babinet is double-layer hollow structure, and it is filled with heat-conducting mediums, and are embedded with cooling coil 5, above-mentioned
The inlet and outlet of cooling coil 5 pass through the external water-cooling circulating system of pipeline respectively.
Above-mentioned collision stage 3 is the stripe board parallel with the above-mentioned cooling stock guide 2 of top layer, and upper surface is evenly equipped with multiple
The collision protrusion 31 of taper.
In the course of work, the excessive cinder notch of circulating fluidized bed boiler is connected to feeding port 11, high temperature furnace slag is through feeding port 11
It falls on the cooling stock guide 2 of top layer, the cooling stock guide 2 from top to bottom along every layer slides (tumbling) successively, finally falls
It drops down onto 1 bottom wall of babinet to be discharged by slag-drip opening 13, in the whole process, the clinker take-up entered through feeding port 11 is fallen in collision stage
It collides with collision stage 3 on 3, keeps bulky grain clinker broken, place internal coking and cause to cool down halfway situation, separately
Outside, cooling deflector 2 carries out good cooling to clinker, it is ensured that the slag temperature after finished breaking is normal, can directly carry out
Subsequent processing, in addition, the heat exchange of cooling coil 5 and water-cooling circulating system can be to 1 internal cooling of babinet, so that stove
Slag can be quickly cooled down cooling, promote effect and efficiency of the whole equipment to clinker cooling down.
Preferably, the bottom wall of above-mentioned babinet 1 is set as downwardly projecting spherical surface, above-mentioned slag-drip opening 12 is located at above-mentioned babinet 1
The apex of bottom wall, which enables smoothly slides (rolling through cooling 2 clinker after cooling of deflector along the bottom wall of babinet 1
It is dynamic) to slag-drip opening 12, being unlikely to be deposited on 1 bottom wall of babinet influences normal deslagging.
Preferably, in order to facilitate 12 smooth deslagging of slag-drip opening, multiple support legs are uniformly provided in the lower end of above-mentioned babinet 1
13 so that slag-drip opening 12 is suspended on ground, is convenient for good deslagging.
Preferably, the upper end of above-mentioned babinet 1 be equipped with it is at least one with the gas vent 14 that is connected to inside it, in clinker into cartonning
It behind 1 inside of body, inevitably has flue dust or bulk gas is brought into, in order to ensure 1 air pressure inside of babinet is normal, pass through exhaust
Hole 14 can discharge part gas, keep 1 air pressure inside of babinet safe and stable.
Preferably, above-mentioned water-cooling circulating system includes water pump 6 and cooling bay 7, the water inlet end of above-mentioned water pump 6 passes through pipeline point
Not Lian Tong municipal tap water pipe network and/or cooling bay 7, water outlet by the water inlet of the above-mentioned cooling coil of pipeline connection 5, on
It states the water outlet of cooling coil 5 and passes through the above-mentioned cooling bay of pipeline connection 7, it should be noted that in the process towards cooling bay 7
In, the equipment using hot water can be needed by external other of pipeline, energy saving to make full use of heat, entire water cooling is followed
Loop system will absorb heat after water body import cooling bay 7 cooling (natural cooling or using other ancillary equipments cooling drop
Temperature), finally, the water after cooling bay 7 cools down is used as cooling water source to be recycled in suction cooling coil 5 as cooling through water pump 6 again
Recirculated water, resource recycling rate of waterused is preferable, energy conservation and environmental protection.
Preferably, above-mentioned coolant circulation system includes low-temperature cooling fluid circulating pump and tank for coolant, above-mentioned tank for coolant
It is interior that there is coolant liquid, the liquid feeding end of above-mentioned low-temperature cooling fluid circulating pump and going out for tank for coolant with inlet and liquid outlet
Liquid mouth is connected to, the inlet of the outlet end of above-mentioned low-temperature cooling fluid circulating pump and above-mentioned tank for coolant respectively with it is each above-mentioned cold
But the coolant flow chamber connection in stock guide, entire cooling recirculation system promote with the coolant flow chamber in cooling stock guide 2
At cooling cycle, it is ensured that the cooling of furnace slag to sliding (tumbling) through its surface that cooling deflector 2 can continue.
Preferably, above-mentioned pushing mechanism 41 is hydraulic cylinder, operation is more convenient, it is of course also possible to be cylinder or push rod
Motor etc..
Preferably, the position of corresponding each above-mentioned cooling stock guide 2 is equipped with one group of high pressure spray on 1 madial wall of above-mentioned babinet
Mist mouth 15, every group of above-mentioned high-pressure fog mouth 15 are equipped with multiple, and are respectively facing corresponding above-mentioned 2 upper surface of cooling stock guide spray
Mist, for each above-mentioned high-pressure fog mouth 15 by the external high-pressure cooling water source of pipeline, which enables to clinker to be led in cooling
When slipping over and (rolling across) in flowing plate 2, the clinker that high-pressure fog mouth 15 can be on corresponding cooling deflector 2 carries out misting cooling,
Further promote the effect of cooling of furnace slag.
Every group of multiple above-mentioned high-pressure fog mouths 15 are equidistantly spaced apart along straight line, and the line between it with it is corresponding
Cooling stock guide 2 it is parallel, and be arranged on 1 inner wall of babinet of cooling 2 side of stock guide.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (9)
1. a kind of circulating fluid bed boiler slag cools down equipment, it is characterised in that：Including babinet (1), multiple cooling stock guides
(2), collision stage (3) and multiple pushers (4)；
The upper end of the babinet (1) is equipped with feeding port (11), and lower end is equipped with slag-drip opening (12)；
Multiple cooling stock guides (2) between the upper and lower every and be staggered on the madial wall of the babinet (1), and it is each described
One end of cooling stock guide (2) is connected and fixed with the wherein side inner wall of the babinet (1), and the other end is towards the babinet
(1) opposite other side inner wall tilts down；
Collision stage (3) setting is internal in the babinet (1) and is located at the upper of described cooling stock guide (2) one end of top layer
Side, the feeding port (11) are located above the collision stage (3)；
Multiple pushers (4) correspond with multiple cooling stock guides (2)；
The pusher (4) includes pushing mechanism (41) and push plate (42), and the pushing mechanism (41) is separately fixed at described
The position of corresponding cooling stock guide (2) one end, driving end pass through the corresponding side wall of the babinet (1) on babinet (1) lateral wall
It is internal to stretch into babinet (1), the push plate (42) connect with the driving end of the pushing mechanism (41), and the pushing mechanism (41) can
Driving the push plate (42), reciprocating linear moves from one end to the other end along the upper surface of corresponding cooling stock guide (2)；
Coolant flow chamber is equipped in each cooling stock guide (2), the coolant flow intracavitary has coolant liquid, and
Pass through the external coolant circulation system of conduit；
Babinet (1) side wall is double-layer hollow structure, and it is filled with heat-conducting mediums, and are embedded with cooling coil (5), described
The inlet and outlet of cooling coil (5) pass through the external water-cooling circulating system of pipeline respectively.
2. a kind of circulating fluid bed boiler slag according to claim 1 cools down equipment, it is characterised in that：The collision stage
(3) it is the stripe board parallel with cooling stock guide (2) of top layer, upper surface is evenly equipped with the collision protrusion of multiple tapers
(31)。
3. a kind of circulating fluid bed boiler slag according to claim 1 cools down equipment, it is characterised in that：The babinet
(1) bottom wall is set as downwardly projecting spherical surface, and the slag-drip opening (12) is located at the apex of the babinet (1) bottom wall.
4. a kind of circulating fluid bed boiler slag according to claim 3 cools down equipment, it is characterised in that：The babinet
(1) lower end is uniformly provided with multiple support legs (13).
5. a kind of circulating fluid bed boiler slag according to claim 1 cools down equipment, it is characterised in that：The babinet
(1) upper end is equipped at least one gas vent (14) being connected to its inside.
6. a kind of circulating fluid bed boiler slag according to any one of claims 1 to 5 cools down equipment, it is characterised in that：
The water-cooling circulating system includes water pump (6) and cooling bay (7), and the water inlet end of the water pump (6) is respectively communicated with city by pipeline
Political affairs tap water pipe network and/or cooling bay (7), water outlet are described cold by the water inlets of cooling coil described in pipeline connection (5)
But the water outlet of coil pipe (5) passes through cooling bay described in pipeline connection (7).
7. a kind of circulating fluid bed boiler slag according to any one of claims 1 to 5 cools down equipment, it is characterised in that：
The coolant circulation system includes low-temperature cooling fluid circulating pump and tank for coolant, and the tank for coolant has inlet and goes out liquid
Mouthful, interior that there is coolant liquid, the liquid feeding end of the low-temperature cooling fluid circulating pump to be connected to the liquid outlet of tank for coolant, the low temperature
The inlet of the outlet end of coolant recirculation pump and the tank for coolant respectively with the cooling in each cooling stock guide
Liquid flow cavity is connected to.
8. a kind of circulating fluid bed boiler slag according to any one of claims 1 to 5 cools down equipment, it is characterised in that：
The pushing mechanism (41) is hydraulic cylinder.
9. a kind of circulating fluid bed boiler slag according to any one of claims 1 to 5 cools down equipment, it is characterised in that：
The position of corresponding each cooling stock guide (2) is equipped with one group of high-pressure fog mouth (15) on babinet (1) madial wall, often
The group high-pressure fog mouth (15) is equipped with multiple, and is respectively facing corresponding cooling stock guide (2) the upper surface spraying, often
A high-pressure fog mouth (15) passes through the external high-pressure cooling water source of pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721769920.5U CN207936057U (en) | 2017-12-18 | 2017-12-18 | A kind of circulating fluid bed boiler slag cooling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721769920.5U CN207936057U (en) | 2017-12-18 | 2017-12-18 | A kind of circulating fluid bed boiler slag cooling equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207936057U true CN207936057U (en) | 2018-10-02 |
Family
ID=63646238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721769920.5U Expired - Fee Related CN207936057U (en) | 2017-12-18 | 2017-12-18 | A kind of circulating fluid bed boiler slag cooling equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207936057U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985095A (en) * | 2021-04-27 | 2021-06-18 | 黄宇 | Environment-friendly treatment method for recycling high-temperature boiler slag |
| CN113201640A (en) * | 2021-05-07 | 2021-08-03 | 马鞍山市益丰实业集团有限公司 | Rapid forming cooling device for steel ball production and cooling method thereof |
| CN114229481A (en) * | 2022-02-23 | 2022-03-25 | 中国恩菲工程技术有限公司 | Cooling type high-temperature granule conveying device |
-
2017
- 2017-12-18 CN CN201721769920.5U patent/CN207936057U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985095A (en) * | 2021-04-27 | 2021-06-18 | 黄宇 | Environment-friendly treatment method for recycling high-temperature boiler slag |
| CN113201640A (en) * | 2021-05-07 | 2021-08-03 | 马鞍山市益丰实业集团有限公司 | Rapid forming cooling device for steel ball production and cooling method thereof |
| CN114229481A (en) * | 2022-02-23 | 2022-03-25 | 中国恩菲工程技术有限公司 | Cooling type high-temperature granule conveying device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207936057U (en) | A kind of circulating fluid bed boiler slag cooling equipment | |
| CN108561756B (en) | Raw coke oven gas pipeline condenses liquid processing device before a kind of primary cooler | |
| CN202246731U (en) | Waste heat recovery and bag-type dust removal system | |
| CN202092225U (en) | Air compressor waste heat recovering and water heating device | |
| CN203162933U (en) | High-sulfur coal circulating fluidized bed boiler | |
| CN104390211B (en) | A kind of air-water combined slag cooler with breaker | |
| CN107774005B (en) | A kind of exhaust treatment system and method for acid regeneration unit | |
| CN102312039B (en) | Converter smoke cooling device | |
| CN201175643Y (en) | Gas dust-removing dehydrating device | |
| CN207501493U (en) | Condenser and refrigeration system | |
| CN206876010U (en) | One kind aeration chilling tower | |
| CN208980445U (en) | A kind of waste incineration water leg circulating cooling return water system | |
| CN207881503U (en) | A kind of white cigarette processing unit | |
| CN102304603A (en) | Waste heat recovery and bag-type dust removal system | |
| CN207760045U (en) | A kind of cooling device prepared for insoluble sulfur | |
| CN207422913U (en) | A kind of hot pressing furnace power-off automatic water switching device | |
| CN209292410U (en) | A kind of glowing furnace circulating cooling plant | |
| CN202081024U (en) | Cement cooling system | |
| CN201317795Y (en) | Cooling water circulation system for quenching work piece | |
| CN201634707U (en) | Recovery of waste heat and bag dust-removal system | |
| CN204987443U (en) | Vertical energy -saving environmental -protection boiler | |
| CN205482400U (en) | Hot DRI cooling treatment of rotary hearth furnace and waste heat recovery utilize system | |
| CN110631009A (en) | Wind-water combined circulation vertical slag cooler | |
| CN209246299U (en) | A kind of efficient, energy-efficient freon air-cooler | |
| CN206113509U (en) | Utilize liquid nitrogen basin evacuation low -temperature nitrogen to make air precooler of cold source |
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: 20181002 Termination date: 20201218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |