CN201026458Y - Novel system for manufacturing limestone powder - Google Patents
Novel system for manufacturing limestone powder Download PDFInfo
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- CN201026458Y CN201026458Y CNU2007200627422U CN200720062742U CN201026458Y CN 201026458 Y CN201026458 Y CN 201026458Y CN U2007200627422 U CNU2007200627422 U CN U2007200627422U CN 200720062742 U CN200720062742 U CN 200720062742U CN 201026458 Y CN201026458 Y CN 201026458Y
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- 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
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
A new preparation system for limestone powders also provides a pre-mill in front of a high fine mill and is characterized in that the raw materials of limestone powders output by a material collecting hopper are sent into the pre-mill through a vibration feeder and a belt conveyor, and the powder materials from a material outlet of the pre-mill are sent into the high fine mill through a bucket elevator, a transfer storage, an electronic measuring belt scale and the belt conveyor and the out fine powder of the high fine mill is chosen into a powder-choosing machine through an air skewed slot and the bucket elevator and the sorted qualified powders go into a finished product bin while the unqualified coarse powders are fed back to the high fine mill to be reground. The utility model has the advantages of simple structure, occupying little area, low fault rate, easy operation and maintenance, low production cost, high content of fine powders and good desulphurization effect.
Description
Technical field:
The utility model relates to a kind of material preparation system, is specifically related to a kind of power plant desulfurization agent agstone preparation system.
Background technology:
In " boiler flue gas desulfurization " environmental protection project engineering of thermal power plant, the material that is used as desulfurizing agent mainly is an agstone, and the preparation of agstone is meant the metaling in stone pit, by the grinding of professional machine, makes it to become the powder that reaches certain fineness.Traditional agstone preparation system branch " wet method " and " dry method " two kinds.No matter traditional wet method system equipment is homemade or import, all there is the shortcoming that single machine yield is low, equipment manufacturing cost is high, unit cost is too high; Though traditional dry method system has greatly reduced cost than wet method system, still has the anxiety that unit-hour output is low, quality is unstable.
Summary of the invention:
Technical problem to be solved in the utility model is: solve the problem that above-mentioned prior art exists, and provide a kind of system simple, produce stable, cost is low, greatly reduce total energy consumption, system's floor space is little, fault rate is low, easy operating and maintenance, the fine powder content that increases substantially the Super-fine grinder powder delivery, the agstone that strengthens desulfurized effect prepare new system.
The technical solution adopted in the utility model is: this agstone prepares new system, has Super-fine grinder machine, powder concentrator, and the output of Super-fine grinder machine connects powder concentrator, and feature of the present utility model is: the input at the Super-fine grinder machine also adds pre-grinding machine.
In the technique scheme, the aggregate bin blanking output of lime stone raw material enters the charging aperture of pre-grinding machine after vibra feeder, belt conveyor are carried, the discharging opening powder output of pre-grinding machine enters the charging aperture of Super-fine grinder machine through bucket elevator, transfer storage facility, electronics metering belt conveyer scale, belt conveyor, the discharging opening fine powder output of Super-fine grinder machine enters the powder concentrator charging aperture through air flume, bucket elevator, the qualified fine powder of fine powder outlet output of powder concentrator enters warehouse for finished product, the defective meal of meal outlet output of powder concentrator feeds back to the Super-fine grinder machine inlet capable through elephant trunk.
In the technique scheme, the supply package of vibra feeder tilts to install, the top charging, supply package termination rigidity is equipped with vibrating motor, vibrating motor drives eccentric wheel and rotates the generation vibration, supply package connects spring, and is connected on the frame by spring-loaded, and the material in the supply package evenly falls from discharging opening.
In the technique scheme, pre-grinding machine is a kind of vertical grinder, drive motors, transmission and deceleration system are installed in top, motor is connected and fixed three taper type rollers by the main axis rotation of belt pulley, the pre-grinding machine of driving belt drive reductor on the main shaft, pre-grinding machine casing inner wall is fixed with liner plate, keep certain clearance between taper type roller and the liner plate, have mounting bracket on the pre-grinding machine casing, casing top has charging aperture, and bottom of shell has discharging opening.When main shaft rotates, the taper type roller both revolved round the sun around main core, again owing to and liner plate between the material friction form rotation, after material feeds from charging aperture, material is subjected to roller and constantly rolling of liner plate and is pulverized in folding process, the middling flour behind the precrushing is discharged from the discharging opening of pre-grinding machine bottom.
In the technique scheme, bucket elevator is erect endless-belt for erectting to install in the outer cover, endless-belt is sleeved on the belt pulley, connect transmission by CD-ROM drive motor by belt, erect outer cover upper end one side and have discharging opening, erect outer cover lower end one side and have charging aperture, equidistant uniform a plurality of hoppers that are equipped with on the endless-belt, during the running of driven by motor endless-belt, granule materials is scraped feed hopper after the charging aperture feeding, risen to the top with hopper by belt, when hopper overturn on the top, granule materials was poured out, and discharged from discharging opening.
In the technique scheme, the Super-fine grinder machine is by feed arrangement, rotating cylinder, drawing mechanism, base bearing, running part and lubricating system are formed, drive motors passes through reduction box, pinion, the cylindrical shell gear wheel connects the transmission rotating cylinder, rotating cylinder is made of two bins, middle partition panel with an astragal hole separates, in two bins liner plate is housed all, what adorn in first bin is the stairstepping liner plate, what adorn in second bin is a watt shape liner plate, material is bored first storehouse that directly feeds in the grinding mill barrel through charging, the abrasive body of being adorned is with greatly, medium-sized abrasive body is main, its function is that the master is auxilliary with grinding with the impact, when cylindrical shell rotated, material obtained pulverizing under the percussion of bigger abrasive body of average diameter such as steel ball, and steel ball impacts with material in the process that falls and cylindrical shell rotate, collision, grind; Be ground into the material of certain particle size, stitch by the partition panel castor, enter into second storehouse, material is further pulverized and is ground by average diameter less abrasive body such as steel ball in second storehouse, reached after the certain fineness by the discharging grate plate, after drawing mechanism is discharged from grinding machine, the tail end of Super-fine grinder machine is connected with the deduster of big air quantity, and the suction airstream of deduster is provided by the mobile power that provides of material.
In the technique scheme, air flume is made up of last groove, following groove, between last groove and the following groove filtering layer is installed, filtering layer does not see through filter material powder only by air, air flume tilts to install, material is from the last groove of the high-end charging aperture feeding air flume of air flume, and outside compressed air inserts the compressed air inlet of air flume, and enters down groove, compressed air sees through the last groove that filtering layer enters air flume, and the promptly low extreme direction of direction is mobile towards downstream to carry the granular material of going up groove secretly.
In the technique scheme, powder concentrator is an efficient rotor formula powder concentrator, rotor and drip plate are installed in the casing, rotor connects transmission by variable speed electric motors, particularly by big pinion, and the casing upper end has charging aperture, and the rotor below has the fines collection bucket, join with the fine powder outlet that the casing bottom has, casing bottom side has the meal outlet, and the casing next door also is equipped with circulating fan, and circulated air enters powder concentrator from tangential direction.The variable speed electric motors, particularly of adjustable speed drives the rotor high-speed rotation of powder concentrator, and after granular material fed powder concentrator from top, the larger particles in the material was fallen out far away by rotor, collect together along drip plate, discharges from the meal mouth.Being fallen out by rotor than granule in the material is nearer, is collected bucket and collects together, discharges from the fine powder mouth.The circulated air that blower fan system provides enters the powder machine of selecting from tangential direction, and the wind field that stirs with rotor has formed the classification circle, because the rotating speed of rotor is adjustable, so the fineness of sorting is adjustable.
Of the present utility modelly Prometheanly introduced pre-grinding machine (particle diameter≤40mm) has carried out pre-grinding earlier to the lime stone raw material, again with the (average grain diameter≤2mm) carry out grinding in the feeding Super-fine grinder machine of the lime stone after the fragmentation, the discharging of Super-fine grinder is sent into high-efficient powder concentrator and is carried out sorting, the qualified micro mist of selecting (≤45 μ m) is sent into warehouse for finished product, defective powder is picked out to return in the Super-fine grinder machine by elephant trunk and regrinds, therefore, native system abbreviates " pre-grinding+Super-fine grinder+select powder " system again as.Pre-grinding machine of the present utility model is worn into the particle diameter of mill feed material≤40mm≤the 2mm average grain diameter, its effect be with the corase grind task transfers in traditional Super-fine grinder machine 1 storehouse to the column mill outside the mill do, thereby make the unit production capacity of Super-fine grinder machine increase, improve 20%, system produces more stable, and reduced system's total energy consumption (more than 20%), effectively overcome present domestic lime stone pulverized coal preparation system ubiquity finished product ash and yielded poorly and the unsettled shortcoming of quality.Adopt the Super-fine grinder grinding system of the pre-grinding of the utility model, not only system is simple, smoothness, floor space is little, and it is low also to be embodied in system failure rate, easy operating and maintenance, reduce production costs, especially can increase substantially the fine powder content of fine grinding powder delivery, help the enhancing of desulfurized effect.
Description of drawings:
Fig. 1 is the utility model structural representation
Fig. 2 is the vibra feeder structural representation
Fig. 3 is pre-grinding machine structural representation
Fig. 4 is the bucket elevator structural representation
Fig. 5 is a Super-fine grinder machine structural representation
Fig. 6 is the air flume structural representation
Fig. 7 is the high-efficient powder concentrator structural representation
The specific embodiment:
Referring to Fig. 1, this agstone prepares new system, has Super-fine grinder machine 9, powder concentrator 13, and 9 outputs of Super-fine grinder machine connect powder concentrator 13, and feature of the present utility model is: the input at Super-fine grinder machine 9 also adds pre-grinding machine 4.The aggregate bin 1 blanking output of lime stone raw material is through vibra feeder 2, after carrying, belt conveyor 3 enters the charging aperture of pre-grinding machine 4, the discharging opening powder output of pre-grinding machine 4 is through bucket elevator 5, transfer storage facility 6, electronics metering belt conveyer scale 7, belt conveyor 8 enters the charging aperture of Super-fine grinder machine 9, the discharging opening fine powder output of Super-fine grinder machine 9 is through air flume 10 and deduster 11, bucket elevator 12 enters powder concentrator 13 charging apertures, the qualified fine powder of fine powder outlet output of powder concentrator 13 enters warehouse for finished product 14, the defective meal of meal outlet output of powder concentrator 13 feeds back to Super-fine grinder machine 9 charging apertures through elephant trunk 15.
Referring to Fig. 2, the supply package 16 of vibra feeder 2 tilts to install, the top charging, supply package 16 termination rigidity are equipped with vibration motivation 17, vibrating motor 17 drives eccentric wheel and rotates the generation vibration, supply package 16 connects spring 18, and is connected on the frame by spring 18 supportings, and the material in the supply package 16 evenly falls from discharging opening 19.
Referring to Fig. 3, pre-grinding machine 4 is a kind of vertical grinders, drive motors 20, transmission and deceleration system are installed in top, motor via reducer, belt pulley, driving belt 21 drive the main axis rotation of pre-grinding machine, are connected and fixed three taper type rollers 22 on the main shaft, and pre-grinding machine casing 23 inwalls are fixed with liner plate, keep certain clearance between taper type roller and the liner plate, have mounting bracket 24 on the pre-grinding machine casing 23, casing top has charging aperture 25, and the bottom has discharging opening 26.When main shaft rotates, taper type roller 22 had both revolved round the sun around spindle axis, again owing to and liner plate between the material friction form rotation, after material feeds from charging aperture, material is subjected to roller and constantly rolling of liner plate and is pulverized in folding process, the middling flour behind the precrushing is discharged from the discharging opening of pre-grinding machine bottom.
Referring to Fig. 4, bucket elevator 5 is erect endless-belt 28 for erectting to install in the outer cover 27, endless-belt 28 is sleeved on the belt pulley 29, CD-ROM drive motor 30 connects transmission endless-belt 28 by belt, erect outer cover upper end one side and have discharging opening 31, erect outer cover lower end one side and have charging aperture 32, equidistant uniform a plurality of hoppers 33 that are equipped with on the endless-belt 28, during the running of driven by motor endless-belt, granule materials is scraped feed hopper after the charging aperture feeding, risen to the top with hopper by belt, when hopper overturn on the top, granule materials was poured out, and discharged from discharging opening.
Referring to Fig. 5, Super-fine grinder machine 9 is by feed arrangement 34, rotating cylinder 35, drawing mechanism 36, base bearing 37, running part and lubricating system are formed, drive motors 38 is by reduction box 39, pinion 40, cylindrical shell gear wheel 41 connects transmission rotating cylinder 35, rotating cylinder 35 is made of two bins, middle partition panel with an astragal hole separates, in two bins liner plate is housed all, what adorn in first bin is the stairstepping liner plate, what adorn in second bin is a watt shape liner plate, material is bored first storehouse that directly feeds in the grinding mill barrel through charging, the abrasive body of being adorned 42 is with greatly, medium-sized abrasive body is main, its function is that the master is auxilliary with grinding with the impact, when cylindrical shell rotated, material obtained pulverizing under the bigger percussion of abrasive body 42 as steel ball of average diameter, and steel ball impacts with material in process that falls and cylindrical shell rotation, collision, grind; Be ground into the material of certain particle size, stitch by the partition panel castor, enter into second storehouse, material is further pulverized and is ground by average diameter less abrasive body such as steel ball in second storehouse, reached after the certain fineness by the discharging grate plate, after drawing mechanism is discharged from grinding machine, the tail end of Super-fine grinder machine is connected with the deduster of big air quantity, and the suction airstream of deduster is provided by the mobile power that provides of material.
Referring to Fig. 6, air flume 10 is made up of last groove 43, following groove 44, filtering layer 45 is installed between last groove 43 and the following groove 44,45 of filtering layers pass through air, do not see through filter material powder, air flume 10 tilts to install, material is from the last groove 43 of the high-end charging aperture 46 feeding air flumes of air flume, outside compressed air inserts the compressed air inlet 47 of air flume, and enter down groove 44, compressed air sees through the last groove that filtering layer enters air flume, and the promptly low extreme direction of direction is mobile towards downstream to carry the granular material of going up groove secretly.
Referring to Fig. 7, powder concentrator 13 is an efficient rotor formula powder concentrator, rotor 49 and drip plate 50 are installed in the casing 48, rotor 49 connects transmission by variable speed electric motors, particularly 51 by gear wheel 52, pinion 53, and casing 48 upper ends have charging aperture 54, and the rotor below has fines collection bucket 55, having fine powder outlet 56 with the casing bottom joins, casing bottom side has meal outlet 57, and the casing next door also is equipped with circulating fan 58, and circulated air enters powder concentrator from tangential direction.The variable speed electric motors, particularly 51 of adjustable speed drives rotor 49 rotation at a high speed of powder concentrator, and after granular material fed powder concentrator from top, the larger particles in the material was fallen out far away by rotor, collected together along drip plate 50, discharged from the meal outlet.Being fallen out by rotor than granule in the material is nearer, is collected bucket and collects together, discharges from the fine powder outlet.The circulated air that blower fan system provides enters the powder machine of selecting from tangential direction, and the wind field that stirs with rotor has formed the classification circle, because the rotating speed of rotor is adjustable, so the fineness of sorting is adjustable.
Claims (6)
1. an agstone prepares new system, has Super-fine grinder machine, powder concentrator, and the output of Super-fine grinder machine connects powder concentrator, it is characterized in that the input of Super-fine grinder machine also adds pre-grinding machine.
2. agstone according to claim 1 prepares new system, the aggregate bin blanking output that it is characterized in that the lime stone raw material is through vibra feeder, belt conveyor enters the charging aperture of pre-grinding machine, the discharging opening powder output of pre-grinding machine is through air flume, bucket elevator, transfer storage facility, electronics metering belt conveyer scale, belt conveyor enters the charging aperture of Super-fine grinder machine, the discharging opening fine powder output of Super-fine grinder machine is through air flume, bucket elevator enters the powder concentrator charging aperture, the qualified fine powder of fine powder outlet output of powder concentrator enters warehouse for finished product, the defective meal of meal outlet output of powder concentrator feeds back to the Super-fine grinder machine inlet capable through elephant trunk.
3. agstone according to claim 2 prepares new system, the supply package that it is characterized in that vibra feeder tilts to install, the top charging, supply package termination rigidity is equipped with vibrating motor, vibrating motor drives eccentric wheel and rotates the generation vibration, supply package connects spring, and is connected on the frame by spring-loaded.
4. agstone according to claim 2 prepares new system, it is characterized in that pre-grinding machine is a kind of vertical grinder, drive motors, transmission and deceleration system are installed in top, thereby motor via reducer belt pulley, driving belt drive the main axis rotation that makes pre-grinding machine, be connected and fixed three taper type rollers on the main shaft, pre-grinding machine casing inner wall is fixed with liner plate, keep certain clearance between taper type roller and the liner plate, has mounting bracket on the pre-grinding machine casing, casing top has charging aperture, and bottom of shell has discharging opening.
5. agstone according to claim 2 prepares new system, it is characterized in that bucket elevator is to erect to install in the outer cover to erect endless-belt, endless-belt is sleeved on the belt pulley, connect transmission by CD-ROM drive motor by belt, erect outer cover upper end one side and have discharging opening, erect outer cover lower end one side and have charging aperture, equidistant uniform a plurality of hoppers that are equipped with on the endless-belt.
6. agstone according to claim 2 prepares new system, it is characterized in that air flume is by last groove, down groove is formed, between last groove and the following groove filtering layer is installed, filtering layer only passes through air, do not see through filter material powder, air flume tilts to install, and material is from the last groove of the high-end charging aperture feeding air flume of air flume, outside compressed air inserts the compressed air inlet of air flume, and enters down groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200627422U CN201026458Y (en) | 2007-03-21 | 2007-03-21 | Novel system for manufacturing limestone powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200627422U CN201026458Y (en) | 2007-03-21 | 2007-03-21 | Novel system for manufacturing limestone powder |
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| CN201026458Y true CN201026458Y (en) | 2008-02-27 |
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| CNU2007200627422U Expired - Fee Related CN201026458Y (en) | 2007-03-21 | 2007-03-21 | Novel system for manufacturing limestone powder |
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| CN (1) | CN201026458Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102755921A (en) * | 2012-07-13 | 2012-10-31 | 河南东大矿业股份有限公司 | Bauxite ore dressing and dissociation combination equipment |
| CN103318625A (en) * | 2013-03-14 | 2013-09-25 | 重庆万盛浮法玻璃有限公司 | Loading sand-discharging system for float glass production line |
| CN106179689A (en) * | 2016-09-09 | 2016-12-07 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of agstone preparation system |
| CN106269169A (en) * | 2016-09-09 | 2017-01-04 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of agstone preparation method |
| CN106345593A (en) * | 2016-09-30 | 2017-01-25 | 中国电力工程顾问集团西南电力设计院有限公司 | Arrangement structure of preparation system for limestone powder and process flow |
| CN106694109A (en) * | 2017-01-16 | 2017-05-24 | 中国电力工程顾问集团西南电力设计院有限公司 | Limestone dry grinding powder manufacturing process system |
| CN111689248A (en) * | 2020-06-12 | 2020-09-22 | 陕西正元环保科技产业(集团)有限公司 | Coal-fired power plant fly ash system transformation method |
| CN114308362A (en) * | 2021-11-17 | 2022-04-12 | 北京建工资源循环利用投资有限公司 | Building waste treatment metering system and treatment method thereof |
| CN117654706A (en) * | 2023-11-15 | 2024-03-08 | 江苏地球村新型建材有限公司 | Granule silt particle grinding apparatus for producing of building material production |
-
2007
- 2007-03-21 CN CNU2007200627422U patent/CN201026458Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102755921A (en) * | 2012-07-13 | 2012-10-31 | 河南东大矿业股份有限公司 | Bauxite ore dressing and dissociation combination equipment |
| CN103318625A (en) * | 2013-03-14 | 2013-09-25 | 重庆万盛浮法玻璃有限公司 | Loading sand-discharging system for float glass production line |
| CN103318625B (en) * | 2013-03-14 | 2015-07-15 | 重庆万盛浮法玻璃有限公司 | Loading sand-discharging system for float glass production line |
| CN106269169B (en) * | 2016-09-09 | 2019-04-02 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of agstone preparation method |
| CN106179689A (en) * | 2016-09-09 | 2016-12-07 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of agstone preparation system |
| CN106269169A (en) * | 2016-09-09 | 2017-01-04 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of agstone preparation method |
| CN106345593B (en) * | 2016-09-30 | 2019-09-13 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of agstone preparation system arragement construction and process flow |
| CN106345593A (en) * | 2016-09-30 | 2017-01-25 | 中国电力工程顾问集团西南电力设计院有限公司 | Arrangement structure of preparation system for limestone powder and process flow |
| CN106694109A (en) * | 2017-01-16 | 2017-05-24 | 中国电力工程顾问集团西南电力设计院有限公司 | Limestone dry grinding powder manufacturing process system |
| CN106694109B (en) * | 2017-01-16 | 2019-09-06 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of lime stone dry grinding flouring technology system |
| CN111689248A (en) * | 2020-06-12 | 2020-09-22 | 陕西正元环保科技产业(集团)有限公司 | Coal-fired power plant fly ash system transformation method |
| CN114308362A (en) * | 2021-11-17 | 2022-04-12 | 北京建工资源循环利用投资有限公司 | Building waste treatment metering system and treatment method thereof |
| CN114308362B (en) * | 2021-11-17 | 2023-07-14 | 北京建工资源循环利用投资有限公司 | Construction waste treatment metering system and treatment method thereof |
| CN117654706A (en) * | 2023-11-15 | 2024-03-08 | 江苏地球村新型建材有限公司 | Granule silt particle grinding apparatus for producing of building material production |
| CN117654706B (en) * | 2023-11-15 | 2024-06-11 | 江苏地球村新型建材有限公司 | Granule silt particle grinding apparatus for producing of building material production |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUNAN FENGHUA PULVERIZED FUEL ASH DEVELOPMENT CO., Free format text: FORMER OWNER: HUNAN ELECTRIC POWER PULVERIZED FUEL ASH DEVELOPMENT CO., LTD. Effective date: 20091225 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091225 Address after: Hunan province Changsha high tech Development Zone, Lu Lu Tin Road No. 8 Valley Oak Park No. 7 210-212, zip code: 410007 Patentee after: Hunan Fenghua Flyash Development Co., Ltd. Address before: Hunan province Changsha high tech Development Zone, Lu Lu Tin Road No. 8 Valley Oak Park No. 7 210-212, zip code: 410007 Patentee before: Hunan Electricity Flyash Development Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080227 Termination date: 20120321 |