CN206092084U - High -efficient waste heat recovery power generation system of cement kiln - Google Patents
High -efficient waste heat recovery power generation system of cement kiln Download PDFInfo
- Publication number
- CN206092084U CN206092084U CN201621111910.8U CN201621111910U CN206092084U CN 206092084 U CN206092084 U CN 206092084U CN 201621111910 U CN201621111910 U CN 201621111910U CN 206092084 U CN206092084 U CN 206092084U
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- China
- Prior art keywords
- outlet
- entrance
- kiln
- waste heat
- cooling water
- 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.)
- Withdrawn - After Issue
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- 239000002918 waste heat Substances 0.000 title claims abstract description 31
- 239000004568 cement Substances 0.000 title claims abstract description 20
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- 238000010248 power generation Methods 0.000 title abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 51
- 239000000498 cooling water Substances 0.000 claims abstract description 28
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 25
- 238000004804 winding Methods 0.000 claims abstract description 11
- 230000005484 gravity Effects 0.000 claims abstract 2
- 230000005611 electricity Effects 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 239000000428 dust Substances 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000006392 deoxygenation reaction Methods 0.000 description 2
- 230000035611 feeding Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 229920002456 HOTAIR Polymers 0.000 description 1
- 241000242583 Scyphozoa Species 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
Abstract
The utility model provides a high -efficient waste heat recovery power generation system of cement kiln, including grog step cooling device, waste heat recovery device, turbine power generation facility, recirculated cooling water device and exhaust treatment device. Grog step cooling device is including cold machine, skew bridge winding plant, platform truck, receiving cone, vertical cooling device, discharge apparatus, belt conveying device, cold -blast valve and the low temperature air -blower of combing, waste heat recovery device includes kiln hood boiler, kiln tail boiler, gravity dust collector, oxygen -eliminating device and water -feeding pump, turbine power generation facility includes steam turbine, generator, condenser and condensate pump, the recirculated cooling water device includes recirculated cooling water pump and cooling tower, exhaust treatment device includes dust remover, draught fan, cigarette blast gate door and chimney. This system had both avoided direct emission of the cold tail a large amount of low temperature exhaust gas of portion of conventional comb, had also improved the surplus heat resource's of kiln hood taste and waste heat recovery volume simultaneously, had effectively improved cement kiln waste heat recovery generating efficiency and technical and economic indicator.
Description
Technical field
The utility model belongs to cement kiln waste heat recovery and utilizes technical field, and in particular to a kind of cement kiln efficient waste heat
Reclaim electricity generation system.
Background technology
In process of production institute's exhaust heat mainly has two parts to cement kiln：1. kiln tail preheater C1 cylinders institute waste air；2. kiln
Head grate-cooler institute heat extraction air.At present this two parts waste heat for more than, main by arranging kiln hood waste heat boiler, kiln tail waste heat
Then boiler will be converged and sent reclaiming and produce superheated steam by steam main from the superheated steam of two waste heat boilers
Enter Turbo-generator Set acting to generate electricity, generating electricity can supply cement plant production and application.
In above-mentioned this cement kiln UTILIZATION OF VESIDUAL HEAT IN mode, kiln hood clinker cooling device be grate-cooler, the cooling device lack
Put and be：It is higher near feed end EGT, and it is relatively low near discharging opening EGT, the change of this temperature so that comb
The waste gas that a large amount of 100～150 DEG C of cold afterbody is not recycled and directly with air is entered, causes huge waste.
The waste heat amount of this part accounts for 15% or so of whole grog sensible heat, a considerable number of.Therefore, how original waste heat is reasonably optimized
Electricity generation system, further makes full use of this part of waste heat, is the pass for improving cement kiln residual heat generating efficiency and technical-economic index
Key.
The content of the invention
For the inefficient deficiency of the taste of existing cement kiln residual neat recovering system thermal source and waste heat recovery, the utility model
Aim to provide a kind of cement kiln efficient waste heat and reclaim electricity generation system, to reach the purpose for improving cement kiln heat recovery rate.
For achieving the above object, the technical solution adopted in the utility model is as follows：
A kind of cement kiln efficient waste heat reclaims electricity generation system, including grog step cooling device, waste-heat recovery device, steamer
TRT, recirculated cooling water device and emission-control equipment, grog step cooling device includes that grate-cooler, skew bridge elevator are filled
Put, chassis, receiving cone, vertical cooling device, device for discharging, belt transport unit, cold blast sliding valve and low temperature blower；Rotary kiln
Outlet is connected with grate-cooler entrance, and grate-cooler outlet is connected with chassis, and chassis is placed on skew bridge winding plant, skew bridge winding plant
It is connected with receiving cone, receiving cone bottom connects vertical cooling device import, vertical cooling device lower disposed has discharging to fill
Put and belt transport unit；Cold blast sliding valve is connected with low temperature blower entrance, and low temperature blower exports the cloth with vertical cooling device
Wind apparatus are connected；Waste-heat recovery device includes kiln head boiler, kiln tail boiler, gravitational precipitator, oxygen-eliminating device and feed pump, deoxygenation
The outlet of device is connected with the entrance of feed pump, feed pump outlet respectively with the first economizer and the entrance phase of the second economizer
Even；The gas outlet on vertical cooling device top is connected by high temperature airduct with gravitational precipitator entrance, gravitational precipitator outlet with
The entrance of kiln head boiler is connected；The first superheater, the first evaporimeter and described first are provided with from top to down in kiln head boiler
Economizer, the outlet of the first superheater is connected with steam main；The one-level cylinder outlet of kiln tail preheater is by airduct and kiln tail pot
The entrance connection of stove, in kiln tail boiler the second superheater, the second evaporimeter and the second economizer, the second mistake are provided with from top to down
The outlet of hot device is connected with the steam main；Turbine generator device includes steam turbine, generator, condenser and condensate
Pump；The steam turbine is connected with generator, and the main inlet throttle-stop valve of steam turbine is connected with the steam main, the exhaust steam of steam turbine outlet with
Condenser entrance is connected, and the hot well of condenser is connected with condensate pump entrance, the outlet of condensate pump and the oxygen-eliminating device entrance
It is connected；Recirculated cooling water device includes circulating cooling water pump and cooling tower, and the pond of cooling tower is connected with circulating cooling water pump；Follow
Ring cooling water pump is connected with the cooling water inlet of the condenser, the coolant outlet of the condenser by cooling water main pipe with
The top of cooling tower is connected；Emission-control equipment includes deduster, air-introduced machine, cigarette air valve and chimney, the kiln head boiler
Outlet is connected with deduster entrance, and house outlet is connected with air-introduced machine entrance, and air-introduced machine outlet passes through respectively the first cigarette air-valve
Door is connected with chimney, is connected with low temperature blower entrance by the second cigarette air valve；The gas outlet on vertical cooling device top leads to
Too high warm air pipe is connected successively with the 3rd cigarette air valve, chimney.
Further, the gravitational precipitator bottom is provided with discharge apparatus.
Compared with traditional cements kiln afterheat generating system, superiority of the present utility model is：Grog step cooling device bag
Grate-cooler and vertical cooling device are included, the sensible heat that can reclaim grog with step using grate-cooler and vertical cooling device is this cold
But mode had both avoided a large amount of low temperature waste gas of conventional cooling drive end unit and had directly discharged, while also improving the product of kiln hood residual heat resources
Taste and waste heat recovery volume, effectively increase cement kiln exhaust heat recovery power generation efficiency and technical-economic index.
Description of the drawings
Fig. 1 is the installation drawing that a kind of cement kiln efficient waste heat of the utility model reclaims electricity generation system.
Wherein, 1- kiln tail preheaters, 2- rotary kilns, 3- grate-coolers, 4- skew bridge winding plants, 4a- chassis, 5- material feedings leakage
Bucket, the vertical cooling kilns of 6-, 6a- devices for discharging, 6b- belt transport units, 7- gravitational precipitators, 7a- discharge apparatus, 8- kiln hood pots
Stove, the drums of 8a- first, the superheaters of 8b- first, the evaporimeters of 8c- first, the economizers of 8d- first, 9- dedusters, 10- air-introduced machines,
11- cigarette air valves, 12- chimneys, 13- cold blast sliding valves, 14- low temperature blowers, 15- cigarette air valves, 16- kiln tail boilers, 16a- first
Drum, the superheaters of 16b- first, the evaporimeters of 16c- first, the economizers of 16d- first, 17- steam turbines, 18- generators, 19- condensings
Device, 20- circulating cooling water pumps, 21- cooling towers, 22- condensate pumps, 23- oxygen-eliminating devices, 24- feed pumps, 25- cigarette air valves, 26-
Cigarette air valve, 27- cigarette air valves.
Specific embodiment
The utility model is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of cement kiln efficient waste heat reclaims electricity generation system, including grog step cooling device, waste heat are returned
Receiving apparatus, turbine generator device, recirculated cooling water device and emission-control equipment.
Grog step cooling device includes grate-cooler 3, skew bridge winding plant 4, chassis 4a, receiving cone 5, vertical cooling dress
Put 6, device for discharging 6a, belt transport unit 6b, cold blast sliding valve 13, low temperature blower 14；Rotary kiln 2 is exported and the entrance of grate-cooler 3
It is connected, the outlet of grate-cooler 3 is connected with chassis 4a, and chassis 4a is placed on skew bridge winding plant 4, and skew bridge winding plant 4 leaks with material feeding
Bucket 5 be connected, the bottom of receiving cone 5 connection the imports of vertical cooling device 6, the lower disposed of vertical cooling device 6 have device for discharging 6a,
Belt transport unit 6b；Cold blast sliding valve 13 is connected with the entrance of low temperature blower 14, and low temperature blower 14 is exported and vertical cooling device 6
Air-distribution device be connected.
Waste-heat recovery device includes kiln head boiler 8, kiln tail boiler 16, oxygen-eliminating device 23 and feed pump 24 etc., oxygen-eliminating device 23
Outlet be connected with the entrance of feed pump 24, feed pump 24 outlet respectively with the first economizer 8d's and the second economizer 16d
Entrance is connected；The gas outlet on the top of vertical cooling device 6 is connected by high temperature airduct with the entrance of gravitational precipitator 7, gravitational dust collection
The outlet of device 7 is connected by cigarette air valve (26) with the entrance of kiln head boiler 8；The first mistake is provided with from top to down in kiln head boiler 8
Hot device 8b, the first evaporimeter 8c and the first economizer 8d, the outlet of the first superheater 8b is connected with steam main；Kiln tail is preheated
The one-level cylinder outlet of device 1 is connected by airduct with the entrance of kiln tail boiler 16, and in kiln tail boiler 16 second is provided with from top to down
Superheater 16b, the second evaporimeter 16c and the second economizer 16d, the outlet of the second superheater 16b is connected with steam main.
Turbine generator device includes steam turbine 17, generator 18, condenser 19 and condensate pump 22；Steam turbine 17 with send out
Motor 18 is connected, and the main inlet throttle-stop valve of steam turbine 17 is connected with steam main, exhaust steam outlet and the entrance phase of condenser 19 of steam turbine 17
Even, the hot well of condenser 19 is connected with the entrance of condensate pump 22, and the outlet of condensate pump 22 is connected with the entrance of oxygen-eliminating device 23.
Recirculated cooling water device includes circulating cooling water pump 20 and cooling tower 21, the pond of cooling tower 21 and recirculated cooling water
Pump 20 is connected；Circulating cooling water pump 20 is connected with the cooling water inlet of condenser 19, and the coolant outlet of condenser 19 is by cold
But jellyfish pipe is connected with the top of cooling tower 21.
Emission-control equipment includes deduster 9, air-introduced machine 10, cigarette air valve and chimney 12, and the kiln head boiler 8 is exported
It is connected with the entrance of deduster 9 by cigarette air valve 27, the outlet of deduster 9 is connected with the entrance of air-introduced machine 10, the outlet of air-introduced machine 10 is logical
Cross cigarette air valve 15 to be connected with the entrance of low temperature blower 14, and be connected with chimney 12 by cigarette air valve 11；Vertical cooling device 6
The gas outlet on top is connected successively by high temperature airduct with cigarette air valve 25, chimney 12.
Further, the bottom of gravitational precipitator 7 is provided with discharge apparatus 7a.
The method that the present embodiment utilizes above-mentioned waste heat recovery generating system：1400～1500 DEG C that rotary kiln 2 is discharged are ripe
Material is cooled to 500～600 DEG C by grate-cooler 3；The grog is entered into chassis 4a, and is sent to by skew bridge winding plant 4
Receiving cone 5；Grog is uniformly distributed in vertical cooling device 6 by receiving cone 5；Low temperature blower 14 is to vertical cooling dress
Cold wind is blasted in putting 6, grog is cooled further to into 100 DEG C or so, by adjusting cold blast sliding valve 13 cold blast rate for blasting is adjusted；It is cold
But the grog after is fallen on belt transport unit 6b by device for discharging 6a, is transported in clinker warehouse；Vertical cooling device 6 is out
Hot blast by gravitational precipitator 7 remove big dust particle after, send into kiln head boiler 8 cooling produce superheated steam, kiln tail is pre-
1 waste air of hot device sends into the cooling of kiln tail boiler 16 and produces superheated steam；Then kiln head boiler 8 and kiln tail boiler 16 are produced
Superheated steam is converged by the steam main, and the generating of turbine generator group is sent to respectively, and exhaust steam after acting drains into condenser 19 simultaneously
Water is condensed into, then the deoxygenation of oxygen-eliminating device 23 is sent to by condensate pump 22, then Jing feed pumps 24 pump into the first province of kiln head boiler
Coal device 8d and the second economizer 16d is recycled；Circulating cooling water pump 20 pumps into cooling water in pond by cooling water main pipe
After condenser 19, then cooling tower 21 is discharged into by cooling water main pipe is cooled down, the water through cooling down eventually passes back to pool circulating
Utilize.
Further, when kiln head boiler 8 needs maintenance, cigarette air valve 26 and cigarette air valve 27 are closed, by kiln head boiler 8
Off-the-line, opens cigarette air valve 25, makes high-temperature flue gas enter air by chimney 12.
When winter operation, when the inlet temperature of kiln head boiler 8 is reduced, cigarette air valve 15 is opened, adjust cigarette air valve 11
With cold blast sliding valve 13, utilize part hot air circulation, so as to improve the input gas temperature of boiler.
A preference embodiment of system described in the utility model is the foregoing is only, is not constituted new to this practicality
The restriction of type protection domain.Any any modification made within spirit of the present utility model and principle, equivalent and change
Enter, should be included within claims of the present utility model.
Claims (2)
1. a kind of cement kiln efficient waste heat reclaims electricity generation system, including grog step cooling device, waste-heat recovery device, steamer are sent out
Electric installation, recirculated cooling water device and emission-control equipment, it is characterised in that：
Grog step cooling device includes grate-cooler (3), skew bridge winding plant (4), chassis (4a), receiving cone (5), vertical cold
But device (6), device for discharging (6a), belt transport unit (6b), cold blast sliding valve (13) and low temperature blower (14)；Rotary kiln (2)
Outlet is connected with grate-cooler (3) entrance, and grate-cooler (3) outlet is connected with chassis (4a), and chassis (4a) is placed in skew bridge winding plant
(4) on, skew bridge winding plant (4) is connected with receiving cone (5), and receiving cone (5) bottom connects vertical cooling device (6) and enters
Mouthful, vertical cooling device (6) lower disposed has device for discharging (6a) and belt transport unit (6b)；Cold blast sliding valve (13) is roused with low temperature
Blower fan (14) entrance is connected, and low temperature blower (14) outlet is connected with the air-distribution device of vertical cooling device (6)；
Waste-heat recovery device includes kiln head boiler (8), kiln tail boiler (16), gravitational precipitator (7), oxygen-eliminating device (23) and feedwater
Pump (24), the outlet of oxygen-eliminating device (23) is connected with the entrance of feed pump (24), the outlet of feed pump (24) respectively with first province's coal
Device (8d) is connected with the entrance of the second economizer (16d)；The gas outlet on vertical cooling device (6) top is by high temperature airduct and weight
Inertia force precipitator (7) entrance connects, and gravitational precipitator (7) outlet is connected with the entrance of kiln head boiler (8)；In kiln head boiler (8) from
Above the first superheater (8b), the first evaporimeter (8c) and first economizer (8d) are arranged with, the first superheater
(8b) outlet is connected with steam main；One-level cylinder outlet the entering by airduct and kiln tail boiler (16) of kiln tail preheater (1)
Mouth connection, in kiln tail boiler (16) the second superheater (16b), the second evaporimeter (16c) and second province's coal are provided with from top to down
Device (16d), the outlet of the second superheater (16b) is connected with the steam main；
Turbine generator device includes steam turbine (17), generator (18), condenser (19) and condensate pump (22)；The steamer
Machine (17) is connected with generator (18), and the main inlet throttle-stop valve of steam turbine (17) is connected with the steam main, the exhaust steam of steam turbine (17)
Outlet is connected with condenser (19) entrance, and the hot well of condenser (19) is connected with condensate pump (22) entrance, condensate pump (22)
Outlet be connected with the oxygen-eliminating device (23) entrance；
Recirculated cooling water device includes circulating cooling water pump (20) and cooling tower (21), the pond of cooling tower (21) and circulating cooling
Water pump (20) is connected；Circulating cooling water pump (20) is connected with the cooling water inlet of the condenser (19), the condenser (19)
Coolant outlet be connected with the top of cooling tower (21) by cooling water main pipe；
Emission-control equipment includes deduster (9), air-introduced machine (10), cigarette air valve and chimney (12), the kiln head boiler (8)
Outlet is connected with deduster (9) entrance, and deduster (9) outlet is connected with air-introduced machine (10) entrance, air-introduced machine (10) outlet difference
Be connected with chimney (12) by the first cigarette air valve (11), by the second cigarette air valve (15) and low temperature blower (14) entrance phase
Even；The gas outlet on vertical cooling device (6) top is connected successively by high temperature airduct with the 3rd cigarette air valve (25), chimney (12)
Connect.
2. a kind of cement kiln efficient waste heat according to claim 1 reclaims electricity generation system, it is characterised in that：The gravity is removed
Dirt device (7) bottom is provided with discharge apparatus (7a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621111910.8U CN206092084U (en) | 2016-10-10 | 2016-10-10 | High -efficient waste heat recovery power generation system of cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621111910.8U CN206092084U (en) | 2016-10-10 | 2016-10-10 | High -efficient waste heat recovery power generation system of cement kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206092084U true CN206092084U (en) | 2017-04-12 |
Family
ID=60413555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621111910.8U Withdrawn - After Issue CN206092084U (en) | 2016-10-10 | 2016-10-10 | High -efficient waste heat recovery power generation system of cement kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206092084U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640221A (en) * | 2016-10-10 | 2017-05-10 | 南京凯盛开能环保能源有限公司 | Efficient cement kiln waste heat recovery and power generation system and method |
| WO2020029041A1 (en) * | 2018-08-06 | 2020-02-13 | 江苏东九重工股份有限公司 | System for recovering waste heat from pure low temperature flue gas of cement plant |
-
2016
- 2016-10-10 CN CN201621111910.8U patent/CN206092084U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640221A (en) * | 2016-10-10 | 2017-05-10 | 南京凯盛开能环保能源有限公司 | Efficient cement kiln waste heat recovery and power generation system and method |
| CN106640221B (en) * | 2016-10-10 | 2018-03-13 | 南京凯盛开能环保能源有限公司 | A kind of cement kiln efficient waste heat recovery electricity generation system and method |
| WO2020029041A1 (en) * | 2018-08-06 | 2020-02-13 | 江苏东九重工股份有限公司 | System for recovering waste heat from pure low temperature flue gas of cement plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170412 Effective date of abandoning: 20180313 |
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| AV01 | Patent right actively abandoned |