CN202145099U - Flue-gas organic Rankine waste heat power generation device with thermal storage temperature equalizer for metallurgical furnace - Google Patents
Flue-gas organic Rankine waste heat power generation device with thermal storage temperature equalizer for metallurgical furnace Download PDFInfo
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- CN202145099U CN202145099U CN201120254745U CN201120254745U CN202145099U CN 202145099 U CN202145099 U CN 202145099U CN 201120254745 U CN201120254745 U CN 201120254745U CN 201120254745 U CN201120254745 U CN 201120254745U CN 202145099 U CN202145099 U CN 202145099U
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- metallurgical furnace
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000003546 flue gas Substances 0.000 title claims abstract description 53
- 239000002918 waste heat Substances 0.000 title claims abstract description 33
- 238000010248 power generation Methods 0.000 title abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 19
- 238000005338 heat storage Methods 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 14
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 238000009835 boiling Methods 0.000 claims description 13
- 239000012716 precipitator Substances 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 8
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 8
- 238000013459 approach Methods 0.000 claims description 7
- 230000035939 shock Effects 0.000 claims description 7
- 239000000498 cooling water Substances 0.000 claims description 6
- 125000001340 2-chloroethyl group Chemical class [H]C([H])(Cl)C([H])([H])* 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 23
- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 abstract 1
- 229960003750 ethyl chloride Drugs 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engine Equipment That Uses Special Cycles (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
一种带有蓄热均温器的冶金炉烟气有机朗肯余热发电装置，包括沉降室、高温除尘器、蓄热均温器、集气室、主风机、排气筒，其特征在于：所述沉降室顺序连接高温除尘器、蓄热均温器、集气室、主风机、排气筒。所述高温除尘器中设置有碳铁滤芯。所述蓄热均温器包括烟气进口、蓄热体、清灰装置、烟气出口和灰斗，所述集气室内安装有换热器，换热器冷水进口与给水泵连接，热水出口接蒸发器。蒸发器工质进口端与循环泵连接，出口端与汽轮机连接，汽轮机一端与冷凝器连接，另一端与发电机连接，冷凝器一端与工质循环泵连接。采用氯乙烷为循环有机工质。本实用新型具有削峰填谷，减小温度的波动幅度，又能最大限度地回收烟气中的热能转化为高品位电能。
A metallurgical furnace flue gas organic Rankine waste heat power generation device with a heat storage homogenizer, comprising a settling chamber, a high temperature dust collector, a heat storage homogenizer, a gas collection chamber, a main fan, and an exhaust pipe, characterized in that: The settling chamber is sequentially connected with a high-temperature dust collector, a heat storage homogenizer, a gas collection chamber, a main fan, and an exhaust cylinder. A carbon iron filter element is arranged in the high temperature dust collector. The heat storage homogenizer includes a flue gas inlet, a heat storage body, a dust removal device, a flue gas outlet and an ash hopper. A heat exchanger is installed in the gas collection chamber, and the cold water inlet of the heat exchanger is connected to the feed water pump, and the hot water The outlet is connected to the evaporator. The inlet end of the working medium of the evaporator is connected to the circulating pump, the outlet end is connected to the steam turbine, one end of the steam turbine is connected to the condenser, the other end is connected to the generator, and one end of the condenser is connected to the working medium circulating pump. Ethyl chloride is used as the circulating organic working fluid. The utility model has the functions of cutting peaks and filling valleys, reducing the fluctuation range of temperature, and can recover the heat energy in the flue gas to the greatest extent and transform it into high-grade electric energy.
Description
Technical field
The utility model relates to a kind of device for generating power by waste heat, and particularly a kind of metallurgical furnace flue gas device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device belongs to flue gas ash removal and cogeneration technology field.
Background technology
The annual mass energy that consumes of steel and iron industry, the high-temperature flue gas and the equipment cooling that produce in the smelting process have been taken away significant amount of energy.Because metallurgical furnace steel-making flue-gas temperature is very high, generally about 1200 ℃, dust concentration reaches 35g/Nm to the temperature of entering pipeline after capturing
3, accounting for more than 80% of dust total amount less than the ash of 5um, Dust Capacity is big, and sticking and thin.And the flue-gas temperature big ups and downs, dustiness is big, and light water tubulation waste heat boiler is difficult to apply to the waste heat recovery of electric furnace flue gas.At present; Heat exchange of heat pipe has successfully applied in the flue gas waste heat recovery of metallurgical furnace; But, make the heat pipe waste-heat recovery device also face a lot of problems at steel industry universal because the inherent shortcoming of heat pipe (cost is high, not freeze proof, non-refractory, service life short).
Owing to contain amounts of dust in the flue gas; Dust stratification, clogging appear in sticking and thin dust on heat exchange element, not only influence heat exchange efficiency, cause the waste heat boiler steam production not enough; Even more serious is because the stifled ash of waste heat boiler; System's fluctuation of service causes to smelt to produce and can't normally carry out the maintenance of being forced to stop production.
Simultaneously, because the metallurgical furnace flue gas temperature fluctuation is violent, wave amplitude is big, and waste-heat recovery device just must design enough greatly, guarantees that high-temperature flue gas also can effectively cool off.But actual steam output the situation of low load with strong power occurs far below the evaporation capacity of waste-heat recovery device.The economic worth that this has just reduced waste-heat recovery device has relatively increased the investment of waste-heat recovery device.
Summary of the invention
The utility model is to the problem that exists in the prior art; A kind of device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device that can effectively reduce metallurgical furnace flue gas temperature fluctuation amplitude is provided; The heat energy that this device can not only reclaim in the flue gas to greatest extent is converted into the high-grade electric energy, drags dedusting fan, can reduce the exhaust temperature of flue gas simultaneously; Obtain good environment protecting, dust emission concentration is less than 8mg/Nm
3
The technical scheme that the utility model adopted is following: a kind of metallurgical furnace flue gas organic Rankine device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device; Comprise combustion settling chamber, hot precipitator, heat-accumulating and temperature-equalizing device, collection chamber, main air blower, aiutage; It is characterized in that: said combustion settling chamber is through pipeline be linked in sequence hot precipitator, heat-accumulating and temperature-equalizing device, collection chamber, main air blower, aiutage; Be provided with carbon iron filter core in the said hot precipitator; Said heat-accumulating and temperature-equalizing device comprises gas approach, composite material of silicon carbide heat storage, shock wave deashing device, exhanst gas outlet and ash bucket; Said composite material of silicon carbide heat storage is arranged between gas approach and the exhanst gas outlet, and the segmentation of said shock wave deashing device is arranged between the heat storage.The one-time surface heat exchanging device is installed in the said collection chamber; The cooling water inlet of one-time surface heat exchanging device is connected with the heat exchanger feed pump; The hot water outlet of one-time surface heat exchanging device is taken over the hot water inlet of shell-type evaporimeter; The cooling water outlet of shell-and-tube evaporator connects circulating water pool, and circulating water pool is connected with the heat exchanger feed pump, constitutes a loop.The working medium entrance point of shell-and-tube evaporator is connected with the high-pressure outlet end of working medium circulating pump; The sender property outlet end of shell-and-tube evaporator is connected with the upper flange interface of steam turbine behind pipeline; The bottom interface of low boiling working fluid steam turbine is connected with the air inlet of copper fin-plate type condenser through pipeline, and the liquid phase outlet of copper fin-plate type condenser is connected with the low pressure inlet end of working medium circulating pump through pipeline, and the low boiling working fluid steam turbine is connected with threephase generator; An end flange interface of copper fin-plate type condenser is connected with water circulating pump; Another end of copper fin-plate type condenser connects cooling tower, and cooling tower is connected with water circulating pump, constitutes another loop.
It is further characterized in that: adopting chloroethanes is the circulation organic working medium.
Because the metallurgical furnace flue gas temperature fluctuation is violent, the flue-gas temperature peak value is high, and after flue gas was handled through the heat-accumulating and temperature-equalizing device of the utility model, the flue-gas temperature fluctuating range can greatly reduce, and has also reduced the peak value of flue-gas temperature simultaneously.Flue gas through the heat-accumulating and temperature-equalizing device advances heat exchanger, because the flue-gas temperature peak value reduces, the device for generating power by waste heat investment is reduced; The flue-gas temperature fluctuating range reduces, and then helps improving the stability of device for generating power by waste heat, increases the service life; Simultaneously,, when manufacturing and designing, equipment can not consider because after the utility model heat exchanger was placed on deduster, the thermal source dust content was low, and therefore can the design of heat exchange core cell spacing of fin is very little; And need not unload ash, deashing, defeated grey facility; UTILIZATION OF VESIDUAL HEAT IN facility volume reduces, and maintenance reduces simultaneously, has also prolonged the service life of heat exchanger, and dust emission concentration is lower.
The advantage of the utility model is:
1. can alleviate the rapid drawdown that rises sharply of flue-gas temperature;
2. solve the problem of expanding with heat and contract with cold;
3. heat exchanger dust stratification does not stop up;
4. prolong the service life of equipment;
5. improve device for generating power by waste heat efficient;
6. reduce the device for generating power by waste heat investment;
7. can reduce and sneak into cold blast rate, practice thrift the dedusting energy consumption.
Description of drawings
Fig. 1 is the apparatus structure sketch map of the utility model.
Among the figure, 1. metallurgical furnace, 2. water-cooled sliding sleeve, 3. combustion settling chamber, 4. hot precipitator; 5. heat-accumulating and temperature-equalizing device, 6. gas approach, 7. composite material of silicon carbide heat storage, 8. ash bucket, 9. shock wave deashing device, 10. exhanst gas outlet; 11. collection chamber, 12. one-time surface heat exchanging devices, 13. heat exchanger feed pumps, 14. circulating water pools, 15. shell-and-tube evaporators; 16. the low boiling working fluid steam turbine, 17. threephase generators, 18. working medium circulating pumps, 19. water circulating pumps; 20. copper fin-plate type condenser, 21. cooling towers, 22. main air blowers, 23. aiutages.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
A kind of metallurgical furnace flue gas organic Rankine device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device comprises combustion settling chamber 3, hot precipitator 4, heat-accumulating and temperature-equalizing device 5, collection chamber 11, main air blower 22, aiutage 23 in the utility model; It is characterized in that: said combustion settling chamber 3 is through pipeline be linked in sequence hot precipitator 4, heat-accumulating and temperature-equalizing device 5, collection chamber 11, main air blower 22, aiutage 23; Be provided with carbon iron filter core in the said hot precipitator 4; Said heat-accumulating and temperature-equalizing device 5 comprises gas approach 6, composite material of silicon carbide heat storage 7, shock wave deashing device 9, exhanst gas outlet 10 and ash bucket 8; Said composite material of silicon carbide heat storage 7 is arranged between gas approach 6 and the exhanst gas outlet 10, and said shock wave deashing device 9 segmentations are arranged between the heat storage 7.In the said collection chamber 11 one-time surface heat exchanging device 12 is installed; The cooling water inlet of one-time surface heat exchanging device 12 is connected with heat exchanger feed pump 9; The hot water outlet of one-time surface heat exchanging device 12 is taken over the hot water inlet of shell-type evaporimeter 15; The cooling water outlet of shell-and-tube evaporator 15 connects circulating water pool 10, and circulating water pool 10 is connected with heat exchanger feed pump 9, constitutes a loop.The working medium entrance point of shell-and-tube evaporator 15 is connected with the high-pressure outlet end of working medium circulating pump 18; The sender property outlet end of shell-and-tube evaporator 11 is connected with the upper flange interface of steam turbine 16 behind pipeline; The bottom interface of low boiling working fluid steam turbine 16 is connected with the air inlet of copper fin-plate type condenser 20 through pipeline; The liquid phase outlet of copper fin-plate type condenser 20 is connected with the low pressure inlet end of working medium circulating pump 18 through pipeline; Low boiling working fluid steam turbine 16 is connected with threephase generator 17, and an end flange interface of copper fin-plate type condenser 20 is connected with water circulating pump 19, and another end of copper fin-plate type condenser connects cooling tower 21; Cooling tower 21 is connected with water circulating pump 19, constitutes another loop.
Said low boiling working fluid is a chloroethanes; The power pressure that gets into the low boiling working fluid steam turbine is 2.5MPa, and when the power pressure after the acting of expanding was 0.45MPa, system's electromotive power output was 3500KW; Rankine cycle efficient is 16.5%, and the flue-gas temperature that system discharges is 80 ℃.
Adopt waste-heat recovery device after the first dedusting; Promptly earlier the high temperature dust flue gas is got into carbon iron filter-element dust collector and purify, the carbon iron filter core in the deduster generally can bear the long-term work temperature about 1200 ℃; High energy bears 1300 ℃ high temperature; And can bear that high temperature is oarse-grained to be washed away, therefore can the direct purification high-temperature flue gas, and need not do any preliminary treatment.Dust concentration after the purification is reduced to less than 8mg/Nm3 and is become clean flue gas, and device for generating power by waste heat need not handled problems such as the obstruction, deashing of dust.
The course of work of the utility model: 150t/h metallurgical furnace 1 flue gas flow 35 * 10
4Nm3/h, 1200 ℃ of temperature, dust content 35g/Nm3 is discharged by the 4th hole, sneaks into cold wind through water-cooled sliding sleeve 2, gets into combustion settling chamber 3 behind the burning CO gas; The effect of combustion settling chamber 3 is: reduce flue gas flow rate; Make the big dust particle sedimentation of carrying in the flue gas, and suitably sneak into cold wind, finally burn CO gas; The flue gas that is come out by combustion settling chamber 3 gets into hot precipitator 4, and dust concentration is less than 8mg/Nm3 after dedusting.After the heat-accumulating and temperature-equalizing effect through 7 pairs of high-temperature flue gas of composite material of silicon carbide heat storage in the heat-accumulating and temperature-equalizing device 5, flue gas gets in the collection chamber 11, and high-temperature flue gas is emitted heat, and temperature is reduced to about 80 ℃, is pressed into aiutage 23 by main air blower 22 and enters atmosphere.Simultaneously, recirculated water drives through heat exchanger feed pump 9, gets into the heat that absorbs flue gas in the one-time surface heat exchanging device 12 that is installed in the collection chamber 11; Form steam water interface; Steam water interface gets in the shell-and-tube evaporator 15 under the Natural Circulation force urges, emits heat, becomes water at low temperature; Water at low temperature flows into circulating water pool 14, the circulation of a beginning new round.
Low boiling working fluid drives through working medium pump 18, in shell-and-tube evaporator 15, absorbs the heat of steam water interface, becomes saturated vapor, behind pressure regulator valve, and the working substance steam acting of low boiling working fluid steam turbine 16 in, expanding, and drive threephase generator 17 generates electricity.The working substance steam of discharging from low boiling working fluid steam turbine 16 is condensed into saturated liquid by copper fin-plate type condenser 20, sends in the shell-and-tube evaporator 15 circulation of a beginning new round after by working medium pump 18 worker quality liquid being pressurizeed again.The electric energy that system sends is a three-phase alternating current, and rated voltage is 380V, incorporates electrical network in the factory into after can passing through pressure regulation, or directly gives consumer and use.
Because heat-accumulating and temperature-equalizing device 5 can be to the flue-gas temperature peak load shifting; Reduce flue gas maximum temperature, reduce the fluctuating range of flue-gas temperature; Alleviate the rapid drawdown that rises sharply of flue-gas temperature; Thereby can reduce the investment of device for generating power by waste heat, improve the stability of device for generating power by waste heat, and can dispose all kinds of waste heat power generation equipments safely.
The maximum characteristics of this device are to adopt low boiling working fluid organic Rankine circulation cogeneration to reclaim the waste heat of metallurgical furnace flue gas.With cogeneration of 150t/h metallurgical furnace and dust collecting process is example, and the utility model device and conventional equipment are relatively explained as follows:
Annotate: work per year and calculated in 330th.
This shows that the utility model smoke dust discharge concentration is low, plant investment is low, operation energy consumption is low, good purification.
The heat energy that the utility model can reclaim in the flue gas to greatest extent is converted into the high-grade electric energy, can also reach good environment protecting.
Claims (5)
1. metallurgical furnace flue gas organic Rankine device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device; Comprise combustion settling chamber, hot precipitator, heat-accumulating and temperature-equalizing device, collection chamber, main air blower, aiutage, it is characterized in that: said combustion settling chamber is through pipeline be linked in sequence hot precipitator, heat-accumulating and temperature-equalizing device, collection chamber, main air blower, aiutage.
2. a kind of metallurgical furnace flue gas organic Rankine device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device according to claim 1 is characterized in that: be provided with carbon iron filter core in the said hot precipitator.
3. a kind of metallurgical furnace flue gas organic Rankine device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device according to claim 1; It is characterized in that: said heat-accumulating and temperature-equalizing device comprises gas approach, composite material of silicon carbide heat storage, shock wave deashing device, exhanst gas outlet and ash bucket; Said composite material of silicon carbide heat storage is arranged between gas approach and the exhanst gas outlet, and the segmentation of said shock wave deashing device is arranged between the heat storage.
4. a kind of metallurgical furnace flue gas organic Rankine device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device according to claim 1; It is characterized in that: the one-time surface heat exchanging device is installed in the said collection chamber, and the cooling water inlet of one-time surface heat exchanging device is connected with the heat exchanger feed pump, and the hot water outlet of one-time surface heat exchanging device is taken over the hot water inlet of shell-type evaporimeter; The cooling water outlet of shell-and-tube evaporator connects circulating water pool; Circulating water pool is connected with the heat exchanger feed pump, constitutes a loop, and the working medium entrance point of shell-and-tube evaporator is connected with the high-pressure outlet end of working medium circulating pump; The sender property outlet end of shell-and-tube evaporator is connected with the upper flange interface of steam turbine behind pipeline; The bottom interface of low boiling working fluid steam turbine is connected with the air inlet of copper fin-plate type condenser through pipeline, and the liquid phase outlet of copper fin-plate type condenser is connected with the low pressure inlet end of working medium circulating pump through pipeline, and the low boiling working fluid steam turbine is connected with threephase generator; An end flange interface of copper fin-plate type condenser is connected with water circulating pump; Another end of copper fin-plate type condenser connects cooling tower, and cooling tower is connected with water circulating pump, constitutes another loop.
5. a kind of metallurgical furnace flue gas organic Rankine device for generating power by waste heat that has the heat-accumulating and temperature-equalizing device according to claim 4 is characterized in that: adopting chloroethanes is the circulation organic working medium.
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| CN201120254745U CN202145099U (en) | 2011-07-19 | 2011-07-19 | Flue-gas organic Rankine waste heat power generation device with thermal storage temperature equalizer for metallurgical furnace |
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| CN201120254745U CN202145099U (en) | 2011-07-19 | 2011-07-19 | Flue-gas organic Rankine waste heat power generation device with thermal storage temperature equalizer for metallurgical furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644488A (en) * | 2012-04-18 | 2012-08-22 | 华北电力大学 | Boiler flue gas waste-heat utilization system based on organic Rankine cycle |
-
2011
- 2011-07-19 CN CN201120254745U patent/CN202145099U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644488A (en) * | 2012-04-18 | 2012-08-22 | 华北电力大学 | Boiler flue gas waste-heat utilization system based on organic Rankine cycle |
| CN102644488B (en) * | 2012-04-18 | 2014-12-03 | 华北电力大学 | Boiler flue gas waste-heat utilization system based on organic Rankine cycle |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120215 Termination date: 20140719 |
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| EXPY | Termination of patent right or utility model |