CN201129724Y - Compound impact mixed cyclone-type petroleum water coke slurry nozzle - Google Patents
Compound impact mixed cyclone-type petroleum water coke slurry nozzle Download PDFInfo
- Publication number
- CN201129724Y CN201129724Y CNU2007201732055U CN200720173205U CN201129724Y CN 201129724 Y CN201129724 Y CN 201129724Y CN U2007201732055 U CNU2007201732055 U CN U2007201732055U CN 200720173205 U CN200720173205 U CN 200720173205U CN 201129724 Y CN201129724 Y CN 201129724Y
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- mixing chamber
- impact
- water coke
- coke slurry
- petroleum water
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Abstract
The utility model relates to an industrial boiler or an industrial furnace compound impact mixing swirling flow type petroleum water coke slurry nozzle which is capable of atomizing high concentration fuel and is suitable to burn petroleum water coke slurry fuel, which comprises a spray head, a mixing chamber and a secondary mixing chamber, wherein the mixing chamber is butted with a fuel tube, the spray head is closely butted with a steam tube, the spray head is equipped with a spray hole, a tubular wall of the mixing chamber is equipped with at least two circles of impact holes of a wound pipe type wall, which are evenly distributed, the secondary fixing chamber is arranged between the mixing chamber and the spray hole, and a swirling flow device is arranged in the secondary mixing chamber. The utility model is capable of avoiding the phenomena of easy deposition, easy blocking, difficult firing, easy coking, easy ash deposition and difficult burning out, which are produced when using the petroleum water coke slurry, has the characteristics that the atomization effect of the petroleum water coke slurry nozzle is excellent, the burning is capable of being fully effectively burned, the thermal efficiency is high, the structure of the product is simple, the service life is long, the utility model is safe and reliable, and the operation, adjustment and maintenance are convenient.
Description
Technical field
The utility model relates to a kind of nozzle, particularly relates to a kind of high concentration fuel and be applicable to the Industrial Boiler of burning petroleum water coke slurry fuel or the compound impact mixing cyclone-type petroleum water coke slurry nozzle at industrial furnace cellar for storing things of can atomizing.
Background technology
At present, a large amount of Industrial Boilers or industrial furnace cellar for storing things equipment are used burning back discharging waste gas such as heavy oil, natural gas or coal gas instead because of palpus control exhaust pollution and are polluted less what is called " clean fuel ", cause the demand of these energy increasing thus, and these natural energy resources are fewer and feweri, price is also more and more higher, makes the cost of combustion of industrial boiler this type of " clean fuel " rise significantly.Therefore, people always seek a kind of not only environmental protection but also inexpensive fresh fuel constantly.The high sulfur petroleum coke that the applicant adopts petroleum refining process to produce carries out twice laid, research and develop out a kind of can wide popularization and application in petroleum water coke slurry fuel and the prescription and the process for making of Industrial Boiler, high sulfur petroleum coke through break process, and is added the clean fuel that an amount of water and chemical addition agent are made a kind of high heating value, low ash content, low sulfur amount.This fuel not only raw material sources is wide, cheap, and use this fuel can also reduce the petroleum coke of stacking as waste residue because of PETROLEUM PROCESSING enterprise to take the large tracts of land soil, and in the petroleum coke dust, petroleum coke based on sulphur etc. the release of harmful substance and the environmental pollution that causes.Use this petroleum water coke slurry fuel, can rationally utilize natural resources, can reduce the fuel cost of Industrial Boiler equipment again, simultaneously can also be by the back discharged flue gas of burning being carried out environmental protection treatment to reduce environmental pollution and to reclaim the raw material of industry, also more meet country and save petroleum resources, improve the energy policy of resource circulation utilization rate.But, because petroleum water coke slurry viscosity is big, easy precipitation, make fuel deposit easily, obstruction in boiler nozzle, and because the fugitive constituent about 11.3% of petroleum water coke slurry, water content is about 30%, has the difficulty of catching fire, easily coking, easy problems such as dust stratification, difficult after-flame during burning.Therefore, can corresponding petroleum water coke slurry boiler nozzle will directly have influence on petroleum water coke slurry flameholding, reliable and perfect, and this just need design a kind of nozzle that uses petroleum water coke slurry that is exclusively used in.
In the prior art, the nozzle of Industrial Boiler or industrial furnace cellar for storing things equipment mostly is to be based upon on the basis of burning common fuel or water-coal-slurry to design, as Chinese utility model patent ZL 200420028115.3 disclosed " combusting coal water slurry, oily dual burner nozzle assembly " (Granted publication number: CN2711544Y; On July 20th, 2005), Chinese invention patent application 200510061444.7 disclosed " coal-water-slurry gasification nozzle " (publication number: CN1752521A Granted publication day:; On March 29th, 2006), Chinese utility model patent ZL 200420028118.7 disclosed " coal-water-slurry gasification nozzle shower nozzle " (Granted publication number: CN2711543Y open day:; Granted publication day: on July 20th, 2005).China utility model patent ZL 02240519.4 disclosed " two-stage reverse impact premixed type coal-water slurry nozzle " (Granted publication number: CN2554477Y; Granted publication day: on June 4th, 2003) etc.The primary structure of China utility model patent ZL 02240519.4 disclosed " two-stage reverse impact premixed type coal-water slurry nozzle " is: by the rifle body, shower nozzle, pressure cap is formed, wherein, shower nozzle is spirally connected by the slurry pipe in silk seat and the rifle body, make the external diameter of rifle body and starch and form the atomizing medium passage between pipe and the shower nozzle, pressure cap and rifle body are spirally connected, and compress the spray sheet, bottom, one-level premix chamber at shower nozzle is symmetrical arranged the water-coal-slurry hole, facing to the empty other one-shot hole that is provided with certain orientation of each slurry, one-level premix chamber communicates by the reducing ring with secondary premix chamber, the secondary pulse hole opposite with one-shot hole direction is set in the secondary premix chamber around the reducing ring symmetrically and evenly, the spray sheet is installed, be shaped on spray orifice on it and spray the sheet striking face at the head of shower nozzle.
Yet, because of the burnt slurry of water-coal-slurry and water has significant difference on characteristic, can bring as directly the nozzle technology of above-mentioned patent being used for using petroleum water coke slurry that fogging degree is not enough, the thermal efficiency is low, perhaps catch fire difficulty, steam consumption quantity is big, combustion stability is not enough, easily coking, easy problems such as dust stratification, difficult after-flame, all can't satisfy the combustion requirements of petroleum water coke slurry well.Therefore, provide a kind of and can overcome problems such as easy deposit when using petroleum water coke slurry, the difficulty of easily stopping up, catch fire, easily coking, easy dust stratification, difficult after-flame, and the petroleum water coke slurry atomizing effect is good, fully efficient burning, thermal efficiency height, and long product lifecycle, the safe and reliable nozzle that uses petroleum water coke slurry have become problem demanding prompt solution.
The utility model content
The purpose of this utility model is to avoid weak point of the prior art and a kind of easy deposit that occurs can avoid using petroleum water coke slurry time the, the difficulty of easily stopping up, catch fire, easily coking, the easy phenomenon of dust stratification, difficult after-flame is provided, and the petroleum water coke slurry atomizing effect is good, fully efficient burning, thermal efficiency height, and product structure is simple, long service life, safe and reliable, operation, adjust and the compound easily impact mixing cyclone-type petroleum water coke slurry nozzle of maintenance.
The purpose of this utility model can realize by following technical measures: compound impact mixing cyclone-type petroleum water coke slurry nozzle, include shower nozzle, mixing chamber, secondary mixing chamber, described mixing chamber docks with cartridge, described shower nozzle docks with the steam pipe sealing, shower nozzle is provided with spray orifice, the tubular wall of described mixing chamber is provided with the equally distributed impact opening of at least two circles around tubular wall, described secondary mixing chamber is arranged between mixing chamber and the spray orifice, is provided with swirl-flow devices in the secondary mixing chamber.Petroleum water coke slurry enters mixing chamber through cartridge, steam enters mixing chamber from steam pipe through two impact openings that enclose around tubular wall of mixing chamber tubular wall, the impact grinding petroleum water coke slurry is atomized with lower specific steam consumption, form steam and petroleum water coke pulp mixture and enter the secondary mixing chamber, further form eddy flow shape atomizing air mixture stream through swirl-flow devices, spray into the burner hearth internal combustion at Industrial Boiler or industrial furnace cellar for storing things from the spray orifice of shower nozzle setting.Further atomizing effect can be by adjusting the ratio that vapour pressure and petroleum water coke slurry are pressed in the ejection power of combustion gas and range thereof and the thorax, and the nozzle hole number of shower nozzle and aperture reach.Thereby the phenomenon of the easy deposit that occurs in the time of can avoiding using petroleum water coke slurry, the difficulty of easily stopping up, catch fire, easily coking, easy dust stratification, difficult after-flame, and make compound impact mixing cyclone-type petroleum water coke slurry nozzle have petroleum water coke slurry atomizing effect good, fully efficient burning, thermal efficiency height, and product structure is simple, long service life, safe and reliable, operation, adjust and maintenance convenient.
As preferred implementation of the present utility model, the axis of the impact opening of the tubular wall setting of the described mixing chamber of compound impact mixing cyclone-type petroleum water coke slurry nozzle and the axis of mixing chamber can be arranged to non-intersect, and promptly off-centre penetrates mixing chamber.Being atomized with lower specific steam consumption when the impact grinding petroleum water coke slurry, and form eddy flow, further improve air mixture and flow disorderly degree and fogging degree at mixing chamber, and the gas-flow flow velocity.As the embodiment that is more preferably of the present utility model, the tubular wall of the mixing chamber of compound impact mixing cyclone-type petroleum water coke slurry nozzle can be provided with the equally distributed impact opening of two circles around tubular wall, and can be arranged to " contrary---contrary " structure, i.e. the angles of the non-intersect and two axis projections in the axis of the axis of impact opening and mixing chamber are greater than 90 degree.As the embodiment that is more preferably of the present utility model, the tubular wall of the mixing chamber of compound impact mixing cyclone-type petroleum water coke slurry nozzle also can be arranged to " suitable---suitable " structure, i.e. the angles of the non-intersect and two axis projections in the axis of the axis of impact opening and mixing chamber are less than 90 degree.As the embodiment that is more preferably of the present utility model, the tubular wall of the mixing chamber of compound impact mixing cyclone-type petroleum water coke slurry nozzle can also be arranged to " contrary---suitable " structure or " suitable---contrary " structure, the axis that is the axis of impact opening and mixing chamber is non-intersect, and wherein the angle of the projection of the axis of the axis of a circle impact opening and mixing chamber (4) big sub 90 is spent, and another circle is less than 90 degree.
As the embodiment that is more preferably of the present utility model, the tubular wall of the described mixing chamber of compound impact mixing cyclone-type petroleum water coke slurry nozzle can be provided with the equally distributed impact opening of two circles around tubular wall, and every circle can be 8 to 12 impact openings.Can be adjusted setting according to instructions for use.
As the embodiment that is more preferably of the present utility model, can be provided with the swirl-flow devices that the tangential swirl sheet constitutes in the described secondary mixing chamber of compound impact mixing cyclone-type petroleum water coke slurry nozzle.Further form eddy flow shape atomizing air mixture stream, improve air mixture stream turbulence, flow velocity and atomizing effect.As more further preferred implementation of the present utility model, this swirl-flow devices can be that the tangential swirl sheet that is provided with 4 or 4 above Wedge blades by evenly distributing on the base and casing pipe sleeve insert secondary and mix in the chamber and constitute, the base of tangential swirl sheet and sleeve pipe one end join, the sleeve pipe other end and shower nozzle join, and the tangential swirl sheet can adopt the wolfram steel material to make.As more further preferred implementation of the present utility model, the tangential swirl sheet of this swirl-flow devices also can be arranged to rotatable syndeton movingly.
As the embodiment that is more preferably of the present utility model, the described shower nozzle of compound impact mixing cyclone-type petroleum water coke slurry nozzle is provided with 8 to 12 spray orifices, can also be inlaid with the wolfram steel lining in the spray orifice.Can be according to the further requirement of atomizing effect in the ejection power of combustion gas and range and the thorax, in conjunction with adjusting the ratio that vapour pressure and petroleum water coke slurry are pressed, the nozzle hole number and the aperture of adjustment shower nozzle.As more further preferred implementation of the present utility model, generally can select shower nozzle to be provided with 10 spray orifices, can be inlaid with the wolfram steel lining in the spray orifice.
The utility model compared with prior art has the following advantages:
(1) the steam specific steam consumption is low, and the petroleum water coke slurry atomizing effect is good, and sufficient combustion is efficient, the thermal efficiency is high, and nozzle is difficult for stopping up, being difficult for coking;
(2) nozzle arrangements is simple, and resistance to elevated temperatures and wearability are good, long service life, safe and reliable;
(3) be easy to control, operate, adjust simply, use, maintenance are conveniently.
Description of drawings
The utility model is described in further detail to utilize accompanying drawing, but the embodiment in the accompanying drawing does not constitute any restriction of the present utility model.
Fig. 1 is the compound impact mixing cyclone-type petroleum water coke slurry structure of nozzle schematic diagram according to first kind of embodiment of the present utility model;
Fig. 2 is the A-A cross-sectional view that compound impact mixing cyclone-type petroleum water coke slurry nozzle shown in Figure 1 is positioned at the swirl-flow devices position;
Fig. 3 is the structural representation of the shower nozzle of shown in Figure 1 compound impact mixing cyclone-type petroleum water coke slurry nozzle.
The specific embodiment
The utility model is described in further detail with the following Examples:
In Fig. 1, Fig. 2 and a kind of compound impact mixing cyclone-type petroleum water coke slurry nozzle of the present utility model shown in Figure 3, include: shower nozzle 1 and 10 spray orifices 9 that are inlaid with the wolfram steel lining thereof; Insert the swirl-flow devices that constitutes in secondary mixing chamber 8 chambeies by tangential swirl sheet 2 and sleeve pipe 3 covers, tangential swirl sheet 2 is provided with 4 Wedge blades by evenly distributing on the base and constitutes, and tangential swirl sheet 2 is made by the wolfram steel material; On mixing chamber 4 and the tubular wall thereof two circle evenly distributes and eccentric, reverse impact opening 5; The steam pipe 6 that docks with shower nozzle 1 sealing; The cartridge 7 that docks with mixing chamber 4; And secondary mixing chamber 8.
According to the compound impact mixing cyclone-type petroleum water coke slurry nozzle of first kind of embodiment of the present utility model as shown in Figure 1, this is the specific embodiment of nozzle that is used to use the station boiler of petroleum water coke slurry, comprising shower nozzle 1, mixing chamber 4, secondary mixing chamber 8, steam pipe 6, cartridge 7 and swirl-flow devices are arranged.In the present embodiment: the structure of shower nozzle 1 as shown in figures 1 and 3, can be provided with 10 spray orifices 9 that are inlaid with the wolfram steel lining, with high-temperature region and the particle collision in the high-speed rotational that solves spray orifice 9, rub required resistance to elevated temperatures and anti-wear performance, to increase the service life; The tubular wall of mixing chamber 4 is provided with the equally distributed reverse impact opening 5 of two circles around tubular wall, the segment distance of being separated by between two circles forms the secondary impact structure, the axis angle of the axis of impact opening 5 and mixing chamber 4 is greater than 90 degree, but generally being no more than 145 degree is advisable, general every circle can be provided with between 10 impact openings, 5, the two circle impact openings 5 and can also stagger mutually along the axis direction of mixing chamber 4; Cartridge 7 docks with mixing chamber 4 sealings; Steam pipe 6 docks with shower nozzle 1 screw thread, can add super gasket during butt joint to improve sealing effectiveness; Secondary mixing chamber 8 is arranged between mixing chamber 4 and the spray orifice 9; Swirl-flow devices is arranged in the secondary mixing chamber 8.Petroleum water coke slurry enters mixing chamber 4 through cartridge 7, steam enters mixing chamber 4 from two impact openings 5 that enclose around tubular wall of steam pipe 6 through mixing 4 Room tubular walls, the broken petroleum water coke slurry of reverse impact, atomized with lower specific steam consumption, form steam and petroleum water coke pulp mixture, and raising speed enters secondary mixing chamber 8 to increase impulsive force, further forms eddy flow shape atomizing air mixture stream through swirl-flow devices, and the spray orifice 9 that is provided with from shower nozzle 1 sprays into the boiler furnace internal combustion.Further atomizing effect can pass through to adjust the ratio of vapour pressure and petroleum water coke slurry pressure in the ejection power of combustion gas and range thereof and the thorax, and spray orifice 9 quantity and the aperture of shower nozzle 1 reach.
Compound impact mixing cyclone-type petroleum water coke slurry nozzle according to second kind of embodiment of the present utility model, in the specific embodiment of the station boiler nozzle that uses petroleum water coke slurry, the axis of the impact opening 5 of the tubular wall setting of mixing chamber 4 and the axis of mixing chamber can be arranged to non-intersect, and promptly off-centre penetrates mixing chamber 4.Being atomized with lower specific steam consumption when the impact grinding petroleum water coke slurry, and form eddy flow, further improve air mixture and flow disorderly degree and fogging degree at mixing chamber, and the gas-flow flow velocity.
Compound impact mixing cyclone-type petroleum water coke slurry nozzle according to the third embodiment of the present utility model, in the specific embodiment of the station boiler nozzle that uses petroleum water coke slurry, can be provided with the swirl-flow devices that tangential swirl sheet 2 constitutes in the secondary mixing chamber 8.The air mixture tangential swirl sheet 2 of flowing through makes it at a high speed to rotate into secondary mixing chamber 8, further forms eddy flow shape atomizing air mixture stream, improves air mixture stream turbulence, flow velocity and atomizing effect.The structure of swirl-flow devices as depicted in figs. 1 and 2, can be that the tangential swirl sheet 2 that is provided with 4 Wedge blades by evenly distributing on the base and sleeve pipe 3 covers insert in secondary mixing chambers 8 chambeies and constitute, the base of tangential swirl sheet 2 and sleeve pipe 3 one ends join, and sleeve pipe 3 other ends and shower nozzle 1 join; Tangential swirl sheet 2 can adopt the wolfram steel material to make, to solve its high-temperature region and the particle collision in the high-speed rotational near spray orifice 9, rub required resistance to elevated temperatures and anti-wear performance, to increase the service life.The Wedge blade of tangential swirl sheet 2 also can be arranged to 5 or more, and viscosity, particle size situation that concrete sheet number is looked petroleum water coke slurry are provided with.
Last institute should be noted that; above embodiment is only in order to the explanation the technical solution of the utility model but not to the restriction of the utility model protection domain; although the utility model has been done detailed description with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the essence and the scope of technical solutions of the utility model.
Claims (10)
1. compound impact mixing cyclone-type petroleum water coke slurry nozzle, include shower nozzle (1), mixing chamber (4), secondary mixing chamber (8), described mixing chamber (4) docks with cartridge (7), described shower nozzle (1) docks with steam pipe (6) sealing, shower nozzle (1) is provided with spray orifice (9), it is characterized in that: the tubular wall of described mixing chamber (4) is provided with the equally distributed impact opening (5) of at least two circles around tubular wall, described secondary mixing chamber (8) is arranged between mixing chamber (4) and the spray orifice (9), and the secondary mixing chamber is provided with swirl-flow devices in (8).
2. compound impact mixing cyclone-type petroleum water coke slurry nozzle according to claim 1, it is characterized in that: the axis of the impact opening (5) that the tubular wall of described mixing chamber (4) is provided with and the axis of mixing chamber (4) are non-intersect, and promptly off-centre penetrates mixing chamber (4).
3. compound impact mixing cyclone-type petroleum water coke slurry nozzle according to claim 1 and 2, it is characterized in that: the tubular wall of described mixing chamber (4) is provided with the equally distributed impact opening (5) of two circles around tubular wall, and be arranged to " contrary---contrary " structure, i.e. the angles of the non-intersect and two axis projections in the axis of the axis of impact opening (5) and mixing chamber (4) are greater than 90 degree.
4. compound impact mixing cyclone-type petroleum water coke slurry nozzle according to claim 1 and 2, it is characterized in that: the tubular wall of described mixing chamber (4) is provided with the equally distributed impact opening (5) of two circles around tubular wall, and be arranged to " suitable---suitable " structure, i.e. the angles of the non-intersect and two axis projections in the axis of the axis of impact opening (5) and mixing chamber (4) are less than 90 degree.
5. compound impact mixing cyclone-type petroleum water coke slurry nozzle according to claim 1 and 2, it is characterized in that: the tubular wall of described mixing chamber (4) is provided with the equally distributed impact opening (5) of two circles around tubular wall, and be arranged to " contrary---suitable " structure or " suitable---contrary " structure, the axis that is the axis of impact opening (5) and mixing chamber (4) is non-intersect, and wherein the angle of the projection of the axis of circle impact opening (a 5) axis and mixing chamber (4) is greater than 90 degree, and another circle is less than 90 degree.
6. compound impact mixing cyclone-type petroleum water coke slurry nozzle according to claim 1 and 2, it is characterized in that: the tubular wall of described mixing chamber (4) is provided with the equally distributed impact opening (5) of two circles around tubular wall, and every circle is 8 to 12 impact openings (5).
7. compound impact mixing cyclone-type petroleum water coke slurry nozzle according to claim 1 and 2 is characterized in that: be provided with the swirl-flow devices that tangential swirl sheet (2) constitutes in the described secondary mixing chamber (8).
8. compound impact mixing cyclone-type petroleum water coke slurry nozzle according to claim 7, it is characterized in that: described swirl-flow devices is that the tangential swirl sheet (2) and sleeve pipe (3) cover that are provided with 4 or 4 above Wedge blades by evenly distributing on the base insert formation in secondary mixing chamber (8) chamber, the base of tangential swirl sheet (2) and sleeve pipe (3) one ends join, sleeve pipe (3) other end and shower nozzle (1) join, and tangential swirl sheet (2) is made for the wolfram steel material.
9. compound impact mixing cyclone-type petroleum water coke slurry nozzle according to claim 1 and 2, it is characterized in that: described shower nozzle (1) is provided with 8 to 12 spray orifices (9), and spray orifice is inlaid with the wolfram steel lining in (9).
10. compound impact mixing cyclone-type petroleum water coke slurry nozzle according to claim 9, it is characterized in that: described shower nozzle (1) is provided with 10 spray orifices (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201732055U CN201129724Y (en) | 2007-09-18 | 2007-09-18 | Compound impact mixed cyclone-type petroleum water coke slurry nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201732055U CN201129724Y (en) | 2007-09-18 | 2007-09-18 | Compound impact mixed cyclone-type petroleum water coke slurry nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201129724Y true CN201129724Y (en) | 2008-10-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201732055U Expired - Fee Related CN201129724Y (en) | 2007-09-18 | 2007-09-18 | Compound impact mixed cyclone-type petroleum water coke slurry nozzle |
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| CN (1) | CN201129724Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864760A (en) * | 2015-02-05 | 2016-08-17 | 三菱日立电力***株式会社 | Atomizer and combustion device using the same |
| CN112082157A (en) * | 2020-09-04 | 2020-12-15 | 上海交通大学 | Water-coal-slurry nozzle with high-pressure steam |
-
2007
- 2007-09-18 CN CNU2007201732055U patent/CN201129724Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864760A (en) * | 2015-02-05 | 2016-08-17 | 三菱日立电力***株式会社 | Atomizer and combustion device using the same |
| US10113746B2 (en) | 2015-02-05 | 2018-10-30 | Mitsubishi Hitachi Power Systems, Ltd. | Atomizer and combustion device using the same |
| CN105864760B (en) * | 2015-02-05 | 2019-03-19 | 三菱日立电力***株式会社 | Spray nozzle and the burner for having used spray nozzle |
| CN112082157A (en) * | 2020-09-04 | 2020-12-15 | 上海交通大学 | Water-coal-slurry nozzle with high-pressure steam |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20081008 Termination date: 20140918 |
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| EXPY | Termination of patent right or utility model |