CN201382701Y - Converter exhaust waste heat recycling device - Google Patents
Converter exhaust waste heat recycling device Download PDFInfo
- Publication number
- CN201382701Y CN201382701Y CN200920010352U CN200920010352U CN201382701Y CN 201382701 Y CN201382701 Y CN 201382701Y CN 200920010352 U CN200920010352 U CN 200920010352U CN 200920010352 U CN200920010352 U CN 200920010352U CN 201382701 Y CN201382701 Y CN 201382701Y
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- heat boiler
- waste heat
- steam
- converter
- flue
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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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- 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
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a converter exhaust waste heat recycling device which comprises a converter smoke hood primary waste heat boiler, a steam separator, a surrounding plate, a ceiling, a smoke purifying device, a secondary dust removal smoke box, a smoke purifying device and a steam generator. A converter exhaust gas down pipeline connected with a secondary waste heat boiler plant is connected to the smoke outlet of a converter smoke hood calandria-type waste heat boiler; the secondary waste heat boiler plant consists of a secondary waste heat boiler, a steam outlet, a smoke outlet, a soft water pipeline, a flow meter, a pipeline valve, a steam pressure gage, a water level gauge, a safety valve and a multi-leaf valve for suction adjustment. The utility model collects primary dust removal, secondary dust removal, secondary recovery and steam of the waste heat boiler from the upper surrounding plate and other parts together, and fully and completely recycles converter exhaust waste heat likely to be utilized, thereby reducing the water consumption of OG devices, reducing the cement paste treatment capacity in the subsequent operation, achieving the purpose of energy saving and emission reduction, and realizing the converter negative energy steel-making.
Description
Technical field
The utility model relates to the energy-conserving and emission-cutting technology field in the convertor steelmaking process, particularly a kind of converter waste gas heat recovery device.
Background technology
In the converting process of pneumatic steelmaking, can produce the high-temp waste gas of big amount temperature up to 1600 ℃-1700 ℃.These high-temp waste gas are discharged from converter mouth, through movable gas hood, flue (calandria waste heat boiler), the steam that waste heat boiler produces is sent into steam-water separator, EGT is reduced to 900 ℃-1000 ℃ from 1600 ℃-1700 ℃, enter the OG device then and carry out wet dust removal, with a large amount of water quench waste gas, the stove dirt in water and the waste gas forms a large amount of dirt mud, and then these dirt mud are carried out processed.
At present, most coverter pig OG method dust collecting process, utilize waste heat boiler to reclaim the physics heat of flue gas, because waste heat boiler produces the saturated vapor pressure fluctuation at 0.8～1.3MPa, steam pressure is low, be difficult to into total pipe network summer, steam quality is lower, and utilization rate is not high in metallurgical works, causes steam to diffuse in a large number, particularly yield is low, causes significant wastage.This also is that many steel mills fail to realize the negative major reason that can make steel.Therefore, how to solve the key issue that problem that the steam of recovery can effectively utilize has become steel mill.We know that ton steel reclaims coal gas of converter 100m
3, gas heat recovered steam 90kg/t steel just can be realized negative can steel-making truly, so will strengthen Steam Recovery Study on Technology working dynamics, improves the ability and the utilization rate of Steam Recovery as early as possible.With the 100t converter is example, it is about 1700 ℃ that the flue gas plug for outlet enters flue, after entering flue and carrying out heat exchange, the flue gas smoke outlet flue enters smoke eliminator, 900 ℃-1000 ℃ temperature is still arranged, enter smoke eliminator and mean that recovery waste heat finishes, according to international relevant complementary energy, waste heat recovery standard, under the condition that technical conditions, equipment allow, the lower limit temperature of various waste heat carrier recovery waste heats is: 500 ℃ of solid carriers, 80 ℃ of liquid carriers, 150 ℃-200 ℃ of gaseous carriers.That is to say by top device flue gas 750 ℃～850 ℃ temperature loss to be arranged, the flue gas smoke outlet flue enters smoke eliminator, to the flue gas processing of lowering the temperature, consumes a large amount of water.As seen, energy waste is very big.
Coaming plate above the converter is that steel construction is made, and is in all the time in the baking of 1600 ℃ of high temperature, and scaling loss is serious, and the frequency of replacing is higher, not only wasting manpower and material resources but also influence production; Simultaneously, also wasted a large amount of heats.
The flue gas of secondary BOF dedusting system, when entering smoke box, temperature is at 1700 ℃, and this partly carries the flue gas of heat, is extracted in the deduster by blower fan, because temperature is too high, smoke box, deduster is had very big infringement, and waste a large amount of heats.How to reclaim this part flue gas heat, reduce the temperature of flue gas, reducing maintenance cost also is the problem that solve.
Application for a patent for invention 200710185379.8 sides disclose a kind of " method of recycling and regenerating steel plant residual heat boiler saturated steam ", and equipment comprises converter heat recovery boiler, steam filtering voltage regulation device, saturated vapor heating furnace, low-pressure turbine, generator, condenser, blower fan, water circulating pump, oxygen-eliminating device, feed pump etc.This patent application problem to be solved is that the steel plant's waste heat boiler saturated vapor how to utilize generates electricity, but does not relate to how reclaiming more converter waste gas waste heat.
Therefore, in today of vigorously implementing the energy-saving and emission-reduction policy, this traditional waste gas processing method is demanded urgently improving.
Summary of the invention
The utility model purpose is to be to provide a kind of converter waste gas heat recovery device, being used for reclaiming the temperature of discharging from flue (calandria waste heat boiler) is the waste heat of 900 ℃ of-1000 ℃ of waste gas, make flue gas enter that temperature becomes 150 ℃ before the purifier, thereby, reduce the water consumption and the discharge capacity of OG device, and reclaimed a large amount of heats.
The purpose of this utility model realizes by following technical proposals:
Converter waste gas heat recovery device of the present utility model, comprise waste heat boiler of converter flue, steam-water separator, coaming plate and ceiling, smoke eliminator, the final dusting smoke box, secondary filter, steam turbine generator, electric automatization control device, it is characterized in that connecting a converter waste gas decline pipeline at the smoke outlet of described converter flue calandria waste heat boiler, this converter waste gas decline pipeline is connected with secondary waste heat boiler apparatus for vapour-cooling, this secondary waste heat boiler apparatus for vapour-cooling is by the secondary waste heat boiler, the steam (vapor) outlet of this secondary waste heat boiler, exhanst gas outlet, the soft water pipeline that this steam (vapor) outlet is connected with described steam-water separator, be located at flowmeter and pipeline valve on this soft water pipeline, be located at the steam pressure gauge on this secondary waste heat boiler, water level considering security valve, the exhanst gas outlet of this secondary waste heat boiler is connected with described smoke eliminator through flue, this secondary waste heat boiler is connected with described steam turbine generator by circulation line, be provided with many fans valve of regulating suction at described converter waste gas decline pipeline inlet and exit, on described secondary waste heat boiler, be provided with pressure gauge, safety valve, described electric automatization control device secondary waste heat boiler apparatus for vapour-cooling and steam turbine generator device therewith are connected.
Be provided with the executing agency that comprises high pressure forced circulation pump, low force circulating pump, pressure oxygen-eliminating device and deoxygenation water tank and feed pump on described circulation line, described electric automatization control device these executing agencies on the circulation line therewith is connected.
Between described secondary waste heat boiler and described steam-water separator, connect an air accumulator with steam pipework.
Described converter waste gas decline pipeline is the insulation pipeline.
Described secondary waste heat boiler is the calandria waste heat boiler.
Described coaming plate and ceiling are little waste heat boiler, and this little waste heat boiler is connected with the steam-water separator of described converter top, forms a little heat recovery device.
The little waste heat boiler of described little waste heat boiler for making by grade of steel 20g solid matter boiler tube.
The both sides of described flue add buffer, add flue gas velocity compensation device in the centre of flue, and flue will carry out reducing and handle when being connected with smoke eliminator.
Described final dusting smoke box leading portion is the flue type residual heat boiler, the steam (vapor) outlet of the flue type residual heat boiler of this final dusting is connected to form the Steam Recovery use device of a final dusting by the steam-water separator of riser culverts and described converter top, the flue type residual heat boiler of this final dusting is connected with described steam-water separator with tedge by the soft water pipeline, the flue type residual heat boiler of this final dusting exhanst gas outlet be connected with described secondary filter through common flue.
The flue type residual heat boiler of the flue type residual heat boiler of described final dusting for making with grade of steel 20g solid matter boiler tube.
Operation principle of the present utility model is:
1) flue gas in converter flue exit is guided to the installation waste heat boiler of (or on platform of certain altitude) on the ground with utilidor, and enter the flue gas of waste heat boiler at the inlet of utilidor, less through the utilidor temperature loss, flue gas is recycled heat absorption in waste heat boiler, its principle is: the soft water in the boiler constantly absorbs the heat of flue gas, make it become 1.0MPa steam, deliver to the waste heat boiler air storage chamber by water.The soft water of waste heat boiler and steam-water separator is from same demineralized water treatment device, the waste heat boiler apparatus for vapour-cooling is made up of waste heat boiler, steam-water separator, high pressure forced circulation pump, low force circulating pump, pressure oxygen-eliminating device and deoxygenation water tank, feed pump and circulating line, flowmeter and pipeline valve are installed on the soft water pipeline, waste heat boiler is established steam pressure gauge and water level meter, and safety valve is installed.Device adopts electric automatization control.
When flue gas goes out waste heat boiler, the temperature of flue gas is 150 ℃-200 ℃, enters smoke eliminator through piping, and this pipeline can not be incubated, the both sides of pipeline add buffer, because behind the pipeline lengthening, the flow velocity of flue gas will have loss, so, the speed 20m/s that enters purifier for the suction that guarantees converter and flue gas, will add flue gas velocity compensation device in the centre of pipeline, pipeline will carry out reducing and handle when being connected with smoke eliminator.
More than design, because flue gas reclaims through secondary waste heat, the flue-gas temperature that enters purifier has only 150 ℃, can economize on water 1/2 through measuring and calculating.With 100 tons of converters is example, will use the water yield of 1000t/h originally, the existing water yield that only needs 500t/h, the annual water saving 3,600,000 tons; Steam is pressed the 120kg/t steel, the about 120,000 tons/a of annual recyclable steam.
2) present, the coaming plate above the converter is that steel construction is made, and is in all the time in the baking of 1500 ℃ of high temperature, and scaling loss is serious, and the frequency of replacing is higher, not only wasting manpower and material resources but also influence production; Simultaneously, also wasted a large amount of heats.The utility model is made a boiler (apparatus for vapour-cooling also is steam condenser) with coaming plate and ceiling grade of steel 20g solid matter boiler tube, is connected with the steam-water separator of converter top, forms a little heat recovery device.Like this,, solved the coaming plate burning problems, replaced the physics heat of flue gas again by the water in the boiler, made water become steam, reclaimed heat by the string water for cooling.
Coaming plate and ceiling are made steam condenser, constitute the Steam Recovery use device with steam-water separator device, demineralized water treatment device, except cooler needs new the making, all the other utilize original device.Its principle is: steam-water separator constantly provides soft water for the steam condenser of being made by boiler tube, and soft water absorbs the physics heat in the flue gas, is converted into steam, steam is through tedge, enter steam-water separator, when the steam pressure in the steam-water separator surpassed 1.3Mpa, steam entered air accumulator.
Through measuring and calculating, the about 10,000 tons/a of recyclable steam.Save the about 500,000 yuan/a of maintenance cost.
3) present, the flue gas of secondary BOF dedusting system, when entering smoke box, temperature is at 1700 ℃, and this partly carries the flue gas of heat, is extracted in the deduster by blower fan, because temperature is too high smoke box, deduster is had very big infringement, and wastes a large amount of heats.How to reclaim this part heat, reduce the temperature of flue gas, reduce maintenance cost, this is the problem that we will study.
The utility model is made the flue type residual heat boiler with grade of steel 20g solid matter boiler tube for preceding 20 meters with the final dusting smoke box, and waste heat boiler is made two sections, and flue gas is passed through in boiler, and the soft water in the boiler constantly absorbs the physics heat of flue gas, becomes steam.The steam-water separator of the waste heat boiler of final dusting and converter top constitutes a Steam Recovery use device, and for soft water, waste heat boiler is delivered to steam-water separator by tedge with steam to steam-water separator to waste heat boiler.Flue gas is through after the waste heat boiler cooling, drops to 150 ℃ by 1700 ℃, delivers to deduster by flue again, carries out dedusting.Like this, both reach the purpose of flue gas cool-down, reclaimed a large amount of heats again.
Through measuring and calculating, 50,000 tons of annual Steam Recovery.
Basic principle of the present utility model is, with one-time dedusting, final dusting, one-time dedusting secondary recovery, go up steam that a few part of waste heat boilers such as coaming plate and steam condenser reclaim and all collect and have in the waste heat boiler of the ground secondary recovery of function such as heating, specific practice, with one-time dedusting, final dusting, go up blister cooler such as coaming plate delivers to steam-water separator by tedge pressure and deliver in the storage drum on the platform through utilidor for 1.3MPa steam, utilidor will have flowmeter, Pressure gauge.Air accumulator is delivered to the steam of collecting in the waste heat boiler again, is 1.0MPa through heated pressure, and temperature is that 300 ℃～400 ℃ steam is delivered to steam turbine generator and generated electricity, and by transformer electric energy is delivered to the user again and uses; The flue of being drawn by the one-time dedusting flue will be incubated processing, temperature was about 1000 ℃ when flue gas entered waste heat boiler through valve, when going out waste heat boiler be 150 ℃, because flue gas has loss at the course of conveying medium velocity, so flue gas was wanted acceleration compensator before entering purifier.The steam of waste heat boiler secondary recovery enters air storage chamber, and waste heat boiler will have the water level meter, Pressure gauge, air intake valve, the valve of giving vent to anger.Steam condenser, steam-water separator and softened water pump, pipeline, flowmeter, Pressure gauges such as waste heat boiler, one-time dedusting, final dusting, last coaming plate constitute the soft water supply device.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model.
Fig. 2 is a secondary waste heat boiler plant structured flowchart of the present utility model.
Fig. 3 is a final dusting heat recovery apparatus structure block diagram of the present utility model.
The specific embodiment
Further specify the specific embodiment of the present utility model below in conjunction with accompanying drawing.
As Fig. 1, shown in 2, converter waste gas heat recovery device of the present utility model, comprise waste heat boiler 2 of converter flue, steam-water separator 1, coaming plate and ceiling 4, smoke eliminator 6, final dusting smoke box 3, secondary filter, steam turbine generator 12, electric automatization control device, it is characterized in that connecting a converter waste gas decline pipeline 8 at the smoke outlet of a waste heat boiler 2 of described converter flue, this converter waste gas decline pipeline 8 is connected with secondary waste heat boiler apparatus for vapour-cooling, this secondary waste heat boiler apparatus for vapour-cooling is by secondary waste heat boiler 13, the steam (vapor) outlet of this secondary waste heat boiler 13, exhanst gas outlet, the soft water pipeline 11 that this steam (vapor) outlet is connected with described steam-water separator 1, be located at flowmeter and pipeline valve on this soft water pipeline 11, be located at the steam pressure gauge on this secondary waste heat boiler 13, water level considering security valve, the exhanst gas outlet of this secondary waste heat boiler 13 is connected with described smoke eliminator 9 through flue, this secondary waste heat boiler 13 is connected with described steam turbine generator 12 by circulation line 15, be provided with many fans valve of regulating suction at described converter waste gas decline pipeline 8 inlets and exit, on described secondary waste heat boiler 13, be provided with pressure gauge, safety valve, described electric automatization control device secondary waste heat boiler apparatus for vapour-cooling and steam turbine generator device therewith are connected.
Be provided with the executing agency that comprises high pressure forced circulation pump, low force circulating pump, pressure oxygen-eliminating device and deoxygenation water tank and feed pump on described circulation line 15, described electric automatization control device these executing agencies on the circulation line therewith is connected.
Between described secondary waste heat boiler and described steam-water separator 1, connect an air accumulator 14 with steam pipework.
Described converter waste gas decline pipeline 8 is the insulation pipeline.
Described secondary waste heat boiler 13 is the calandria waste heat boiler.
Described coaming plate and ceiling 4 are little waste heat boiler, and this little waste heat boiler is connected with the steam-water separator of described converter top, forms a little heat recovery device.
The little waste heat boiler of described little waste heat boiler for making by grade of steel 20g solid matter boiler tube.
As shown in Figure 1, the both sides of described flue 10 add buffer, add flue gas velocity compensation device in the centre of flue 10, and flue 10 will carry out reducing and handle when being connected with smoke eliminator 6.
As shown in Figure 3, described final dusting smoke box 3 leading portions are the flue type residual heat boiler, the steam (vapor) outlet of the flue type residual heat boiler of this final dusting is connected to form the Steam Recovery use device of a final dusting by the steam-water separator 1 of riser culverts and described converter 7 tops, the flue type residual heat boiler of this final dusting exhanst gas outlet be connected with described secondary filter through common flue.For soft water, flue type residual heat boiler 3 is delivered to steam-water separator 1 by tedge with steam to steam-water separator 1 to the flue type residual heat boiler, and the exhanst gas outlet of the flue type residual heat boiler of this final dusting is connected with secondary filter 20 through flue.The exhanst gas outlet of secondary filter 20 connects chimney 21
The flue type residual heat boiler of the flue type residual heat boiler of described final dusting for making with grade of steel 20g solid matter boiler tube.
The utility model with one-time dedusting, final dusting, one-time dedusting secondary recovery, go up steam that a few part of waste heat boilers such as coaming plate and steam condenser reclaim and all collect and have in the waste heat boiler of the ground secondary recovery of function such as heating, the converter waste gas waste heat that might utilize is fully fully recycled, reduced the water consumption of OG device, thereby reduced the cement mortar treating capacity of back step operation, reach the purpose of energy-saving and emission-reduction, the realization negative converter can be practiced steel.
Claims (10)
1, a kind of converter waste gas heat recovery system, comprise waste heat boiler of converter flue, steam-water separator, coaming plate and ceiling, flue gas purification system, the final dusting smoke box, secondary filter, steam turbine generator, the electric automatization control system, it is characterized in that connecting a converter waste gas decline pipeline at the smoke outlet of described converter flue calandria waste heat boiler, this converter waste gas decline pipeline is connected with secondary waste heat boiler evaporated cooling system, this secondary waste heat boiler evaporated cooling system is by the secondary waste heat boiler, the steam (vapor) outlet of this secondary waste heat boiler, exhanst gas outlet, the soft water pipeline that this steam (vapor) outlet is connected with described steam-water separator, be located at flowmeter and pipeline valve on this soft water pipeline, be located at the steam pressure gauge on this secondary waste heat boiler, water level considering security valve, the exhanst gas outlet of this secondary waste heat boiler is connected with described flue gas purification system through flue, this secondary waste heat boiler is connected with described steam turbine generator by circulation line, be provided with many fans valve of regulating suction at described converter waste gas decline pipeline inlet and exit, on described secondary waste heat boiler, be provided with pressure gauge, safety valve, described electric automatization control system secondary waste heat boiler evaporated cooling system and steam turbine generator system therewith are connected.
2, converter waste gas heat recovery according to claim 1 system, it is characterized in that being provided with on described circulation line the executing agency that comprises high pressure forced circulation pump, low force circulating pump, pressure oxygen-eliminating device and deoxygenation water tank and feed pump, described electric automatization control system these executing agencies on the circulation line therewith is connected.
3, converter waste gas heat recovery according to claim 1 system is characterized in that connecting an air accumulator with steam pipework between described secondary waste heat boiler and described steam-water separator.
4, converter waste gas heat recovery according to claim 1 system is characterized in that described converter waste gas decline pipeline is the insulation pipeline.
5, converter waste gas heat recovery according to claim 1 system is characterized in that described secondary waste heat boiler is the calandria waste heat boiler.
6, converter waste gas heat recovery according to claim 1 system, it is characterized in that described coaming plate and ceiling are little waste heat boiler, this little waste heat boiler is connected with the steam-water separator of described converter top, forms a little heat recovery system.
7, converter waste gas heat recovery device according to claim 6 is characterized in that the little waste heat boiler of described little waste heat boiler for being made by grade of steel 20g solid matter boiler tube.
8, converter waste gas heat recovery device according to claim 1, the both sides that it is characterized in that described flue add buffer, add flue gas velocity compensation device in the centre of flue, flue will carry out reducing and handle when being connected with smoke eliminator.
9, converter waste gas heat recovery device according to claim 1, it is characterized in that described final dusting smoke box leading portion is the flue type residual heat boiler, the steam (vapor) outlet of the flue type residual heat boiler of this final dusting is connected to form the Steam Recovery use device of a final dusting by the steam-water separator of riser culverts and described converter top, the flue type residual heat boiler of this final dusting is connected with described steam-water separator with tedge by the soft water pipeline, the flue type residual heat boiler of this final dusting exhanst gas outlet be connected with described secondary filter through common flue.
10, converter waste gas heat recovery device according to claim 9, the flue type residual heat boiler that it is characterized in that described final dusting is the flue type residual heat boiler made from grade of steel 20g solid matter boiler tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920010352U CN201382701Y (en) | 2009-01-19 | 2009-01-19 | Converter exhaust waste heat recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920010352U CN201382701Y (en) | 2009-01-19 | 2009-01-19 | Converter exhaust waste heat recycling device |
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| Publication Number | Publication Date |
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| CN201382701Y true CN201382701Y (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200920010352U Expired - Lifetime CN201382701Y (en) | 2009-01-19 | 2009-01-19 | Converter exhaust waste heat recycling device |
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| CN (1) | CN201382701Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906505A (en) * | 2010-07-06 | 2010-12-08 | 上海信孚环保技术工程有限公司 | Converter gas purification and waste heat reclamation method |
| CN101482373B (en) * | 2009-01-19 | 2012-07-04 | 徐文玉 | Waste heat recovery and utilization system for waste gas of revolving furnace |
-
2009
- 2009-01-19 CN CN200920010352U patent/CN201382701Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101482373B (en) * | 2009-01-19 | 2012-07-04 | 徐文玉 | Waste heat recovery and utilization system for waste gas of revolving furnace |
| CN101906505A (en) * | 2010-07-06 | 2010-12-08 | 上海信孚环保技术工程有限公司 | Converter gas purification and waste heat reclamation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100113 Effective date of abandoning: 20090119 |