CN202036925U - Tubular honeycomb ceramic filter membrane module - Google Patents
Tubular honeycomb ceramic filter membrane module Download PDFInfo
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- CN202036925U CN202036925U CN2011200804029U CN201120080402U CN202036925U CN 202036925 U CN202036925 U CN 202036925U CN 2011200804029 U CN2011200804029 U CN 2011200804029U CN 201120080402 U CN201120080402 U CN 201120080402U CN 202036925 U CN202036925 U CN 202036925U
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Abstract
The utility model discloses a tubular honeycomb ceramic filter membrane module which comprises a shell, a feed pipe and a ceramic membrane element, wherein the ceramic membrane element is arranged in the shell. The tubular honeycomb ceramic filter membrane module also comprises a shunt pipe and a guide pipe, wherein the inlet end of the shunt pipe is connected with the feed pipe, and the bottom surface of the outlet end of the shunt pipe is matched with and corresponding to the end face of the ceramic membrane element; the guide pipe is distributed on the bottom surface of the outlet end of the shunt pipe; and a port of the guide pipe corresponds to ducts of the ceramic membrane element. The feed liquid flows into the shunt pipe through the feed pipe and into the ducts of the ceramic membrane element through the guide pipe, and the difference of the flow velocity and flow rate among various ducts of the ceramic membrane is reduced, therefore, the fluid distribution uniformity is effectively improved, the concentration polarization can be effectively controlled, and the separation property of the ceramic membrane is improved. Moreover, the yield of the honeycomb ceramic membrane is improved, the cost of the ceramic membrane is reduced, and the penetration flux is improved at the same time.
Description
Technical field
The utility model relates to the membrane separation technique field, relates in particular to a kind of big specification honeycomb ceramic filter membrane module.
Background technology
It is a kind of simple relatively, low separating technology of power consumption that film separates, and can reclaim and utilize component in the mixture in principle, thereby be widely used in bioengineering, oil, chemical industry, metallurgy, medicine and other fields.The core of all membrane separation devices all is a membrane module, i.e. the combined member that film is fitted together by certain specification requirement.Membrane module relate to the supporter of film, film or attachment, with membrane module in fluid distribute relevant runner, sealing, shell and the external tapping etc. of film.In the process of exploitation membrane module, must consider following basic demand: even fluid distribution, no dead angle; Have favorable mechanical stability, chemical stability and heat endurance; Loading density is big; Low cost of manufacture; Be easy to clean; The pressure loss is little.
According to the shape and the character of film, membrane module can be divided into tubular membrane component, hollow fiber film assembly, plate and frame module and rolled membrane module.Because the rigidity of ceramic material is better, is subjected to preparation technology's restriction simultaneously, for ceramic membrane, what prior art use at present was maximum is the tubular ceramic membrane assembly.In this membrane module, film (being generally 4～18) is fixed in stainless steel, pottery or the plastic support pipe of a porous and constitutes the filter membrane element.The pipeline of transferring raw material and filter membrane element are on the same axis, and just the caliber of filter membrane element is more than or equal to the caliber of transferring raw material pipeline.Feed stream is the membrane component center after filtration, and penetrant flows into the membrane module shell by porous tubular support after film separates.
The prior art ceramic film component, the volume specification is less, is easy to control concentration polarization, and flow regime is good, can regulate the flow velocity of feed liquid on a large scale, and is less demanding and can handle the feed liquid that contains suspended solid to the preliminary treatment of feed liquid, and film cleans after generating dirt easily.But its shortcoming is that investment and operating cost are higher, and loading density is very low, generally is lower than 300m
2/ m
3
Be to improve the loading density of ceramic film component, ceramic filter membrane has also adopted the ceramic honey comb structure at present, increases membrane area in the unit volume by the method that increases fenestra road number, reduces channel diameter.But the filtering film component of this ceramic honey comb structure of prior art still exists following technological deficiency at present:
(1) fluid skewness.
The ceramic honey comb film improves the unit volume membrane area by increasing its area of section, volume is relatively large, be applied to the ceramic honey comb film and at present multichannel tubular type membrane module is amplified simply, must cause becoming the flow velocity in the ceramic honey comb fenestra road of axis will be higher than other ducts with the raw material pipeline, thereby cause the fluid skewness, be difficult to the concentration polarization of controlling diaphragm.Especially all the more so for the ceramic honey comb membrane module of big specification.
(2) osmotic resistance increases complicated process of preparation.
For the ceramic honey comb film, along with reducing of channel diameter and ceramic membrane pore wall thickness, more the penetrating fluid in multimembrane duct can only infiltrate into outlet by the inner duct of ceramic honey comb supporter, and the transport resistance of penetrating fluid also obviously increases, and has reduced permeation flux.The present common methods such as permeate passageway or port fluting that part fenestra road is transformed into that adopt of prior art, although reduced the penetrating fluid penetration length, improved permeation flux, but reduced the membrane area in the unit volume simultaneously to a certain extent, thereby run counter to the design original intention that increases membrane area by honeycomb configuration.And, need carry out post-production to ceramic membrane, difficulty is higher, has further increased preparation technology's complexity.
(3) the ceramic membrane yield rate is low, cost is higher.
More, the complex process of the preparation section of ceramic honey comb film, the possibility of introducing defective increases, make that the yield rate of zero defect ceramic honey comb film is lower, the big specification ceramic honey comb film of larger volume particularly, increase along with the ceramic membrane sectional area, yield rate also can be lower, thereby further increased originally just than higher ceramic membrane cost.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of ceramic membrane loading density height, feed stream physical efficiency equally distributed tubular type honeycomb ceramic filter membrane module in the ceramic honey comb film is provided, to obtain uniform fluid flow fields, effectively control concentration polarization improves the ceramic membrane separating property; In addition, when improving permeation flux, improve the yield rate of ceramic honey comb film, reduce the ceramic membrane cost.
The purpose of this utility model is achieved by the following technical programs:
A kind of tubular type honeycomb ceramic filter membrane module that the utility model provides comprises shell, feed pipe, ceramic membrane element; Described ceramic membrane element setting in the enclosure; In addition, also comprise isocon and guide pipe; Its entrance point of described isocon is connected with feed pipe, and the bottom surface of its port of export is suitable and corresponding with the end face of ceramic membrane element; Described guide pipe is arranged on the port of export bottom surface of isocon, the duct of the corresponding ceramic membrane element of the port of guide pipe.The utility model feed liquid enters isocon through feed pipe, and then flows to by guide pipe in the duct of ceramic membrane element, has reduced the difference of flow velocity and flow between each duct of ceramic membrane, thereby effectively improves the uniformity that fluid distributes.
The utility model also can be taked following further measure: described guide pipe and ceramic membrane element are the oblique angle setting, make feed liquid flow to the duct of ceramic membrane element at a certain angle, thereby in narrow duct, clash into mutually with hole wall, produce the Taylor eddy current, increase the turbulent extent of feed liquid, reduce film and pollute.
Ceramic membrane element described in the utility model can adopt the ceramic honey comb membrane structure, comprises the ceramic honey comb supporter, filters duct, supporting member, securing member; Described ceramic honey comb supporter is a tabular, and its axis of described filtration duct is parallel with the plate face of ceramic honey comb supporter and be arranged side by side in the ceramic honey comb supporter and constitute ceramic honey comb film monomer; Described ceramic honey comb film monomer is more than two or two, and is and stacks at interval combination; Described securing member is arranged on the ceramic honey comb film monomer periphery after the combination; Described supporting member is between the adjacent cell ceramic membrane monomer and between securing member and the ceramic honey comb film monomer, and is arranged on and filters the port, duct.
In the above-mentioned ceramic honey comb membrane structure, filtering the duct is the feed liquid passage, and each ceramic honey comb film monomer is tabular, makes ceramic membrane have short seepage distance.Gap between the ceramic honey comb film monomer is a permeate passageway, and the hole wall infiltration in duct after, thereby flow out, have higher permeation flux after filtration by the gap between ceramic honey comb film monomer for penetrating fluid.
Further, in the utility model ceramic membrane element, detachable being arranged on of described supporting member filtered the port, duct.Like this, can adjust the width of permeate passageway by the thickness of regulating supporting member according to the size of permeation flux; In addition, it is seriously polluted or replace defective ceramic honey comb film monomer to be convenient to disassembly, cleaning.
For reducing the transport resistance of penetrating fluid, the filtration duct is directly adjacent with permeate passageway in the utility model ceramic honey comb film monomer, and single duct can be adopted in promptly described filtration duct; Also can adopt double duct and have higher unit volume membrane area.Further, filter wall thickness between duct and the ceramic honey comb supporter outer surface in the described ceramic honey comb film monomer less than other position wall thickness, thereby have shorter seepage distance, the while can be improved the intensity of ceramic honey comb supporter.
The utility model ceramic membrane element can be cylinder or cuboid.For example, its cross sectional shape perpendicular to filtration duct axis of ceramic honey comb film monomer is trapezoidal for containing arc, and the ceramic membrane element after the combination is cylinder.
Further, isocon described in the utility model is cone, and its cone top is that entrance point, bottom are port of export bottom surface.In addition, described feed pipe is connected with rotary drive mechanism, so that feed pipe, isocon, guide pipe are rotated along the orientation of guide pipe, thereby increases the initial rate that feed liquid enters the fenestra road, further improves the turbulent extent of feed liquid.
The utlity model has following beneficial effect:
(1) even fluid distribution.
The utility model feed liquid enters from feed pipe, through after the shunting of isocon, makes that the flow velocity of feed liquid in guide pipe is approaching.And the guide pipe that is arranged in the isocon bottom surface can cover the duct of ceramic membrane element fully, thereby realizes the even distribution of feed liquid in big specification ceramic honey comb fenestra road.
(2) can control concentration polarization effectively, improve membrane separating property.
Guide pipe makes feed liquid entering the fenestra road at an angle with ceramic membrane pipe fitting axis, and the inertia of feed liquid makes feed liquid constantly collide with the fenestra wall, generation Taylor eddy current, and the huge turbulent flow of formation is taken away solute from the film surface.And, carry feed liquid by rotation, further improved fluid to the washing away of film surface, thus the concentration polarization of controlling diaphragm effectively, and then the pollution that alleviates film, improved membrane separating property.
(3) have higher permeation flux and unit volume membrane area.
In the utility model ceramic membrane pipe fitting, ceramic honey comb film monomer is tabular, and seepage distance is short, and osmotic resistance obviously reduces, and has higher permeation flux.Interval between the ceramic honey comb film monomer is that the width of permeate passageway can be adjusted, therefore can easily adjust permeate passageway according to the size of permeation flux, thereby avoided the reduction of the unit volume membrane area that unnecessary permeate passageway width caused, helped to improve the film density of ceramic membrane.
(4) configuration and preparation technology are simple, have improved the yield rate of ceramic honey comb film, have reduced the ceramic membrane cost.
Flat ceramic honey comb film monomer, volume is less, and the possibility that single product produces defective obviously reduces.Simultaneously, configuration is simple, by detachable the combining of ceramic honey comb film monomer, be convenient to the with serious pollution ceramic membrane monomer of disassembly, cleaning, and only change the separation infiltration function that defective ceramic membrane monomer can recover the ceramic honey comb membrane module again, scrap and be unlikely to integral body, greatly improved ceramic membrane yield rate, reduced the ceramic membrane cost.
Description of drawings
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail:
Fig. 1 is the structural representation of one of the utility model embodiment tubular type honeycomb ceramic filter membrane module;
Fig. 2 is the stereogram of middle ceramic membrane element embodiment illustrated in fig. 1;
Fig. 3 is the A-A profile of Fig. 2;
Fig. 4 is the local enlarged diagram of middle ceramic honey comb film monomer cross section embodiment illustrated in fig. 1;
Fig. 5 is the assembling stereogram of middle feed pipe embodiment illustrated in fig. 1, isocon, guide pipe.
Among the figure: feed pipe 1, isocon 2, guide pipe 3, ceramic membrane element 4, ceramic honey comb film monomer 41, ceramic honey comb supporter 41a filters duct 41b, supporting member 42, securing member 43, permeate passageway 44, outer cylinder body 5, inlet end shield 6, outlet end shield 7, penetrating fluid outlet 8, discharging opening 9
The specific embodiment
Embodiment one:
Fig. 1～Figure 5 shows that one of embodiment of the utility model tubular type honeycomb ceramic filter membrane module.As shown in Figure 1, comprise shell, feed pipe 1, isocon 2, guide pipe 3, ceramic membrane element 4.Wherein shell has outer cylinder body 5, inlet end shield 6 and outlet end shield 7.Outer cylinder body 5 is arranged on the outside of ceramic membrane element 4, and inlet end shield 6 and outlet end shield 7 are separately positioned on the two ends of ceramic membrane element 4.
As Fig. 2, Fig. 3 and shown in Figure 4, ceramic membrane element 4 is the ceramic honey comb membrane structure, comprises the ceramic honey comb film monomer 41, supporting member 42 and the securing member 43 that are made of ceramic honey comb supporter 41a and filtration duct 41b.
Wherein, ceramic honey comb supporter 41a is a tabular, and it is parallel with the plate face of ceramic honey comb supporter 41a and be arranged side by side in ceramic honey comb supporter 41a and formation ceramic honey comb film monomer 41 to filter its axis of duct 41b.As shown in Figure 4, ceramic honey comb film monomer 41 its cross sectional shapes perpendicular to filtration duct 41b axis are trapezoidal for containing arc, filter duct 41b and adopt double duct, the shape of cross section in duct is a square, and the wall thickness W1 between filtration duct 41b and the ceramic honey comb supporter 41a outer surface is less than other positions wall thickness W2 (see figure 4).
Ceramic honey comb film monomer 41 is several, is to stack at interval to constitute cylinder.Securing member 43 adopts stainless stirrup, is arranged on ceramic honey comb film monomer 41 peripheries after the combination.It is the silicone rubber pad of 1mm that supporting member 42 adopts thickness, detachable be arranged between the adjacent cell ceramic membrane monomer 41 and securing member 43 and ceramic honey comb film monomer 41 between port, filtration duct.
As shown in Figure 5, isocon 2 is cone.In inlet end shield 6, isocon 2 its top port are connected with feed pipe 1, and its bottom surface is suitable and corresponding with the end face of ceramic membrane element 4; Guide pipe 3 is arranged on the bottom surface of isocon 2, the duct of the corresponding ceramic membrane element 4 of the port of guide pipe 3.In addition, guide pipe 3 is the oblique angle setting with ceramic membrane element 4, makes feed liquid flow to the duct of ceramic membrane element at a certain angle.
Present embodiment ceramic membrane element 4 is when packing the membrane module shell into, and the sealing of O RunddichtringO is adopted in its port encapsulation, and the membrane module periphery is fixed by flange, to increase the seal degree of O RunddichtringO.Feed liquid enters isocon 2 through feed pipe 1, and then flows at a certain angle by guide pipe 3 in the duct of ceramic membrane element 4.In the ceramic membrane element 4, filtering duct 41b is the feed liquid passage, gap between the ceramic honey comb film monomer 41 is a permeate passageway 44, penetrating fluid is after filtration after the hole wall infiltration of duct 41b, from the gap between the ceramic honey comb film monomer 41 is that permeate passageway 44 flows out on the inwall of outer cylinder body 5, collects through the penetrating fluid outlet 8 that is arranged on the urceolus body wall then.Solute after the filtration is then discharged by the discharging opening 9 that is arranged on the outlet end shield 7.
Ceramic membrane element 4 in the present embodiment according to the size of permeation flux, can be adjusted gap between the ceramic honey comb film monomer 41 by the supporting member 42 of changing different-thickness, thereby change the width of permeate passageway.And, the with serious pollution ceramic membrane monomer of disassembly, cleaning separately, or only change the overall performance that the ceramic membrane monomer that mass defect is arranged can recover the ceramic honey comb membrane module again.
Embodiment two:
Present embodiment tubular type honeycomb ceramic filter membrane module and embodiment one difference are: feed pipe 1 is connected with rotary drive mechanism, as variable speed electric motors, particularly, rotary speed by the speed regulating control feed pipe, so that feed pipe 1, isocon 2, guide pipe 3 are rotated along the orientation of guide pipe 3, thereby increase the initial rate that feed liquid enters the fenestra road, further improve the turbulent extent of feed liquid.
Claims (10)
1. a tubular type honeycomb ceramic filter membrane module comprises shell, feed pipe (1), ceramic membrane element (4); Described ceramic membrane element (4) is provided with in the enclosure; It is characterized in that: also comprise isocon (2) and guide pipe (3); Its entrance point of described isocon (2) is connected with feed pipe (1), and the bottom surface of its port of export is suitable and corresponding with the end face of ceramic membrane element (4); Described guide pipe (3) is arranged on the port of export bottom surface of isocon (2), the duct of the corresponding ceramic membrane element of the port of guide pipe (3) (1).
2. tubular type honeycomb ceramic filter membrane module according to claim 1 is characterized in that: described guide pipe (3) is the oblique angle setting with ceramic membrane element (4).
3. tubular type honeycomb ceramic filter membrane module according to claim 1 is characterized in that: described ceramic membrane element (4) comprises ceramic honey comb supporter (41a), filters duct (41b), supporting member (4), securing member (4); Described ceramic honey comb supporter (41a) is a tabular, and its axis of described filtration duct (41b) is parallel with the plate face of ceramic honey comb supporter (41a) and be arranged side by side in ceramic honey comb supporter (41a) and constitute ceramic honey comb film monomer (41); Described ceramic honey comb film monomer (41) is more than two or two, and is and stacks at interval combination; Described securing member (43) is arranged on the ceramic honey comb film monomer periphery after the combination; Described supporting member (42) be positioned between the adjacent cell ceramic membrane monomer (41) and securing member (43) and ceramic honey comb film monomer (41) between, and be arranged on and filter the port, duct.
4. tubular type honeycomb ceramic filter membrane module according to claim 3 is characterized in that: detachable being arranged on of described supporting member (42) filtered the port, duct.
5. tubular type honeycomb ceramic filter membrane module according to claim 3 is characterized in that: described filtration duct (41b) is single duct.
6. tubular type honeycomb ceramic filter membrane module according to claim 3 is characterized in that: described filtration duct (41b) is double duct.
7. according to claim 3 or 5 or 6 described tubular type honeycomb ceramic filter membrane modules, it is characterized in that: the wall thickness (W1) in the described ceramic honey comb film monomer (41) between filtration duct (41b) and ceramic honey comb supporter (41a) outer surface is less than other position wall thickness (W2).
8. tubular type honeycomb ceramic filter membrane module according to claim 3 is characterized in that: its cross sectional shape perpendicular to filtration duct (41b) axis of described ceramic honey comb film monomer (41) is trapezoidal for containing arc, and the ceramic membrane element after the combination is cylinder.
9. according to claim 1 or 8 described tubular type honeycomb ceramic filter membrane modules, it is characterized in that: described isocon (2) is cone, and its conical top is that entrance point, conical lower portion are port of export bottom surface.
10. tubular type honeycomb ceramic filter membrane module according to claim 9 is characterized in that: described feed pipe (1) is connected with rotary drive mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200804029U CN202036925U (en) | 2011-03-24 | 2011-03-24 | Tubular honeycomb ceramic filter membrane module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200804029U CN202036925U (en) | 2011-03-24 | 2011-03-24 | Tubular honeycomb ceramic filter membrane module |
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| CN202036925U true CN202036925U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200804029U Expired - Fee Related CN202036925U (en) | 2011-03-24 | 2011-03-24 | Tubular honeycomb ceramic filter membrane module |
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| CN (1) | CN202036925U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657422A (en) * | 2012-09-14 | 2014-03-26 | 浙江瑞普环境技术有限公司 | Membrane core and membrane assembly comprising same |
| CN104923080A (en) * | 2015-06-17 | 2015-09-23 | 杭州杰膜环境科技有限公司 | Honeycomb ceramic membrane component and hermetic mounting and demounting method thereof |
| CN105177636A (en) * | 2015-09-14 | 2015-12-23 | 阳谷祥光铜业有限公司 | Electrodeposition device and method |
| CN105664722A (en) * | 2016-03-19 | 2016-06-15 | 萍乡市博鑫精细陶瓷有限公司 | Lateral wall-flow honeycomb ceramic membrane filtering element |
| CN106999859A (en) * | 2014-12-05 | 2017-08-01 | 佛兰芒技术研究所有限公司 | Bellows with integrated functionality |
| CN108180592A (en) * | 2017-12-27 | 2018-06-19 | 昆山斯莱姆节能科技有限公司 | Purification ventilation duct through walls with air-introduced machine |
| CN109758908A (en) * | 2019-03-13 | 2019-05-17 | 上海缘脉环境科技有限公司 | A kind of just permeate draws liquid stream to distributor and draws method |
| CN110559875A (en) * | 2019-09-22 | 2019-12-13 | 张俊杰 | Harmless purification equipment for treating medical waste |
| CN110563272A (en) * | 2019-09-22 | 2019-12-13 | 张俊杰 | Integrated system for sewage treatment |
| CN111249914A (en) * | 2020-01-21 | 2020-06-09 | 四川兴凯歌建设工程有限公司 | Ceramic membrane component with central tube and production process |
| CN111408274A (en) * | 2020-03-30 | 2020-07-14 | 苏州热工研究院有限公司 | Inorganic ceramic membrane component |
-
2011
- 2011-03-24 CN CN2011200804029U patent/CN202036925U/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103657422B (en) * | 2012-09-14 | 2016-05-11 | 浙江瑞普环境技术有限公司 | A kind of film core and consisting of membrane module |
| CN103657422A (en) * | 2012-09-14 | 2014-03-26 | 浙江瑞普环境技术有限公司 | Membrane core and membrane assembly comprising same |
| CN106999859B (en) * | 2014-12-05 | 2020-05-19 | 佛兰芒技术研究所有限公司 | Diaphragm capsule with integrated function |
| CN106999859A (en) * | 2014-12-05 | 2017-08-01 | 佛兰芒技术研究所有限公司 | Bellows with integrated functionality |
| CN104923080A (en) * | 2015-06-17 | 2015-09-23 | 杭州杰膜环境科技有限公司 | Honeycomb ceramic membrane component and hermetic mounting and demounting method thereof |
| CN105177636A (en) * | 2015-09-14 | 2015-12-23 | 阳谷祥光铜业有限公司 | Electrodeposition device and method |
| CN105177636B (en) * | 2015-09-14 | 2018-05-18 | 阳谷祥光铜业有限公司 | A kind of method of electrowinning plant and electrodeposition |
| CN105664722A (en) * | 2016-03-19 | 2016-06-15 | 萍乡市博鑫精细陶瓷有限公司 | Lateral wall-flow honeycomb ceramic membrane filtering element |
| CN108180592B (en) * | 2017-12-27 | 2020-04-24 | 昆山斯莱姆节能科技有限公司 | Through-wall purification ventilation pipe with induced draft fan |
| CN108180592A (en) * | 2017-12-27 | 2018-06-19 | 昆山斯莱姆节能科技有限公司 | Purification ventilation duct through walls with air-introduced machine |
| CN109758908A (en) * | 2019-03-13 | 2019-05-17 | 上海缘脉环境科技有限公司 | A kind of just permeate draws liquid stream to distributor and draws method |
| CN109758908B (en) * | 2019-03-13 | 2021-08-27 | 上海缘脉环境科技有限公司 | Forward osmosis drawing liquid flow direction distribution device and drawing method |
| CN110559875A (en) * | 2019-09-22 | 2019-12-13 | 张俊杰 | Harmless purification equipment for treating medical waste |
| CN110563272A (en) * | 2019-09-22 | 2019-12-13 | 张俊杰 | Integrated system for sewage treatment |
| CN110563272B (en) * | 2019-09-22 | 2022-04-12 | 云南协同环保工程有限公司 | Integrated system for sewage treatment |
| CN111249914A (en) * | 2020-01-21 | 2020-06-09 | 四川兴凯歌建设工程有限公司 | Ceramic membrane component with central tube and production process |
| CN111408274A (en) * | 2020-03-30 | 2020-07-14 | 苏州热工研究院有限公司 | Inorganic ceramic membrane component |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111116 Termination date: 20140324 |