CN201250232Y - Biogas pool with circulated material distribution - Google Patents
Biogas pool with circulated material distribution Download PDFInfo
- Publication number
- CN201250232Y CN201250232Y CNU2008201886965U CN200820188696U CN201250232Y CN 201250232 Y CN201250232 Y CN 201250232Y CN U2008201886965 U CNU2008201886965 U CN U2008201886965U CN 200820188696 U CN200820188696 U CN 200820188696U CN 201250232 Y CN201250232 Y CN 201250232Y
- Authority
- CN
- China
- Prior art keywords
- methane
- water
- generating pit
- water inlet
- training wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Artificial Fish Reefs (AREA)
Abstract
The utility model discloses a biogas pool with circulated material distribution, aimed at providing a biogas pool with a simple structure and sound gas generating effect. The biogas pool comprises a water-feeding flexible cover system, a biogas pool body and a water-discharge pressure chamber system. The water-feeding flexible cover system comprises a water inlet scuttle and a central water intake pipe. No special water inlet is arranged, but the water can be fed through the scuttle; the central water intake pipe is used after the water is fed in, and the water flows to the center of the bottom end of the biogas pool. The biogas pool body is a closed spherical tank, comprising an upper spherical body and a cylindrical body. The bottom of the biogas pool adopts a convex structure, and a cochlear training wall is arranged thereon; casing breaking teeth are arranged by a 120mm interval on the training wall when above 300mm, aiming at realizing circulated distribution of materials and increase the flow length and automatically avoiding incrustation on the surface. The utility model is capable to overcome the problems of existing biogas pools that a separate water inlet is needed and material feeding is difficult during gas production.
Description
Technical field
The present invention relates to the device that a kind of organic waste water anaerobically fermenting prepares biogas, particularly a kind of circulation cloth methane-generating pit.
Background technology
In China rural area, with the residents methane-generating pit is that the ecological agriculture at center is just in the ascendant carrying out, methane-generating pit can be handled organic waste on the one hand and produce bioenergy, the ight soil that the livestock industry of can fermenting on the other hand produces is organic fertilizer, simultaneously can completely include the pollutent that influences in the rural environment in the methane-generating pit anaerobic degradation and conversion, has the effect that beautifies ecotope, thereby biogas become the gordian technique of new countryside construction, certainly will play a greater and greater role in China's rural development.In conjunction with the feature of China peasant household, the general residents methane-generating pit that uses has 6m
3, 8m
3And 10m
3Three kinds of forms.The GB/T4750-1984 " rural area family expenses hydraulic type biomass pool standard collective drawings " that China Standard Press in 1984 has published State Bureau of Standardization's issue has proposed the structure of methane-generating pit, be shaped as circle or sphere, be provided with opening for feed, discharge port, sweathouse, gas tank, removable cover, airway, discharge room dual-purpose ager, therefore be referred to as hydraulic type biomass pool.China Standard Press in 2002 have published middle proposition of GB/T4750-2002 " domestic methane tank standard collective drawings " " meander cloth methane-generating pit " of national quality supervision and inspection quarantine office issue, be characterized in tilting to discharge port by opening for feed at the bottom of the pond, be provided with drapery panel in the bottom surface, pond, make fermentation raw material curved mobile, increase diffusingsurface, prolonged the running of fermentation raw material.The Qiu Ling of Xibei Univ. of Agricultural ﹠ Forest Science ﹠ Technology of scientific and technical literature press publication in 2007 has narrated " revolving-flow methane-generating pit " in " garden biogas High-efficient Production and utilization " book, be characterized in, the circular arc type flow deflector that radius-of-curvature of construction is 5D/8 on pond, the end cuts off input and output material, make the pond raw material under the guide functions of flow deflector, must could arrive the bottom of circulation tube and dreg-drawing pipe along the flow deflector turn, thereby the flow path and the residence time of pit entry fermentation raw material have been prolonged, and the Qiu Ling of Xibei Univ. of Agricultural ﹠ Forest Science ﹠ Technology has also proposed Chinese patent ZL97243731.2 " revolving-flow automated cycle methane-generating pit ", and the revolving-flow methane-generating pit has been carried out technical description.
Promote the use of this several methane-generating pits on China's rural area main flow at present, but following shortcoming is arranged in manufacture process: 1. an opening for feed, a water outlet hold concurrently water pressure house, a removable cover need be set, have three openings altogether, the construction of three openings need design and construct, needed expense approximately needs 1/3 of overall cost, if the minimizing number of openings may reduce cost and save material; 2. removable cover is built badly, can leak gas, if gas leakage causes fire easily or HUMAN HEALTH is worked the mischief; 3. because the little and gradient of opening for feed floor area of building is little, cause easily that charging is floating, charging is difficult to be blocked phenomenon into pond, charging; 4. because opening for feed plays the water pressure house effect, can rise and fall with the air pressure in methane-generating pit size, like this charging be caused inconvenience, if the methane-generating pit internal gas pressure is very big, can cause can not charging; 5. because the methane-generating pit lower semisphere is a concave structure, the natural pond slag is difficult for effluxing.
Summary of the invention
The purpose of this utility model is to provide a kind of and uses and build simply, is shaped as ball-shaped, the circulation cloth methane-generating pit that biogas fermentation efficient is higher.
The purpose of this utility model is by providing a kind of methane-generating pit with following structure to realize.
Circulation cloth methane-generating pit of the present utility model comprises with the lower section to be formed:
Water inlet removable cover system, methane-generating pit main body and outlet system are formed.
Water inlet removable cover system comprises water-in (skylight) and central water inlet pipe; Water-in is the inlet for the treatment of water, plays a part to collect and compile treating water, and the utility model has been cancelled the water-in and the water inlet pipe of traditional methane tank, adopts the skylight water inlet, and central water inlet pipe is used in the water inlet back; Water inlet pipe is the cement pipe that connects the skylight, is the pipeline that treating water enters methane-generating pit, central authorities' water inlet pipe directly enters methane-generating pit bottom central authorities, water inlet pipe internal diameter 300mm, bottom end opening 200 * 200mm, such opening and volute type cloth wall connect, and form the circulation cloth.
The methane-generating pit main body is the closed tank body of a spherical, is divided into two parts, the one, and methane-generating pit episphere, the one, methane-generating pit right cylinder.These two parts are consistent with the structure of traditional hydraulic type biomass pool, and recessed semisphere is not adopted in the bottom but characteristics of the present utility model are methane-generating pit, but adopts the slightly structure of convex.Arrange the training wall of a scroll casing shape above the structure of this convex, purpose is to cause circulation cloth function, increases cloth current length.Distance between the training wall is not a fixed, is typical scroll casing shape structure, need arrange according to Fig. 4.The setting of training wall to make raw material by water inlet pipe at methane-generating pit along one week of training wall rotational flow, afterwards more respectively from the exit of training wall along the methane-generating pit inwall forward or backward the unrestricted flow half-turn to the water outlet of methane-generating pit.The scroll casing shape training wall can be provided with clockwise, also can be provided with counterclockwise, and the utility model is recommended to be provided with clockwise.Suppose methane-generating pit is divided into four mathematics quadrants by round dot, Lower Half at figure is that two scroll casing shape training walls are arranged in third and fourth quadrant, and be to have only a training wall in first and second quadrant at the first half of figure, this wall scroll training wall finishes to 3/5 radius since 2/5 radius.And the quadrant of two training walls appears, and be from the water inlet pipe opening part, through 1/5 place of radius, join to 2/5 place and the wall scroll training wall of radius, the final stage training wall is in the end of radius 4/5 place, joins at 3/5 place and the wall scroll training wall of radius.Training wall is the scroll casing shape structure, thereby has guaranteed the circulation cloth.The water inlet openings of water inlet pipe and water outlet relative position, and the scroll casing shape training wall is in water outlet distal-most end end relatively.The height of training wall will be higher than methane-generating pit pond body, but is no more than 1/3 of gas chamber of marsh gas tank sagitta.
At methane-generating pit outlet 0.5 meter, front a current stabilization wall is set, to guarantee having longer time and effective anaerobic sludge to rest in the methane-generating pit.The methane-generating pit loam cake is traditional double opening for feed of doing in hydraulic type biomass pool skylight, and its sealing method is the same with traditional methane tank.In feed-pipe, plug a metal biogas pipe on the next door, skylight, this metal tube has constituted the initial joint of biogas.The methane-generating pit base plate totally is a convex structure, is two-layer concrete structure, and is 5% to the gradient at water outlet place, flows to outlet to guarantee mud.
Outlet system comprises: between water outlet, water outlet and water pressure house; Water outlet is a rectangle mouth of a river in the end setting of circular methane-generating pit, it is the outlet for the treatment of water, below circular methane-generating pit, setting is shaped as rectangle, exporting wide is 1 meter, and coca is decided according to the pressure of methane-generating pit design, generally speaking, there is distance more than at least 1 meter on the top of water outlet apart from the methane-generating pit top cover, has guaranteed the stable of biogas air pressure like this.Be to build outside water outlet between water outlet, length and width respectively are 1 meter right cylinder or rectangular parallelepiped pipeline, and height will be higher than water outlet; Water pressure house is the usefulness for the adjusting of aerogenesis hydraulic pressure outside between water outlet, and size is 1/3 of this advection cloth gas chamber of marsh gas tank, is traditionally arranged to be circle or rectangle, and diameter is about the size of methane-generating pit radius, and the degree of depth is about 1 meter.
The utility model has the advantages that:
1. simple in structure, can reducing the construction costs; 2. the opening for feed of cancellation traditional methane tank is done opening for feed with the skylight, reduces gas leakage like this; 3. owing to cancelled opening for feed, solved opening for feed when air pressure is high, problem that can not charging has reduced the floating problem of charging, has solved the feed water pressure drag and has hindered problem; 4. cancelled the hemispherical dome structure of traditional methane tank right cylinder Lower Half, adopted convex structure, thereby solved natural pond slag retention problems.
Description of drawings
The overall construction drawing (see figure 1) that Fig. 1 implements for the utility model methane-generating pit;
Fig. 2 is the vertical view (Fig. 2) of the utility model methane-generating pit;
Fig. 3 is the side-view (Fig. 3) of the utility model methane-generating pit;
Fig. 4 is the scroll casing shape training wall section of structure (Fig. 4) of the utility model methane-generating pit;
Fig. 5 is water inlet skylight structure and internal structure layout drawing (Fig. 5).
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
The utility model belongs to ecological energy type biogas utilization pattern, and natural pond liquid after the processing and natural pond slag can be used for fertilizer or breed fish.Building materials varies in size according to methane-generating pit, adopts different concrete structures.
The utility model methane-generating pit volume calculation method, overall shape is a cylinder chop type, and establishing the methane-generating pit volume is V (cubic meter), and ρ is radius-of-curvature (rice), f rise (rice), H is bay wall height (rice), and D is pond interior diameter (rice), and R is pond inside radius (rice).
So, methane-generating pit master pond right cylinder V1=π R
2H,
The radius-of-curvature of Chi Gai is ρ=(4f
2+ D
2)/8f, pond lid V2=π f then chops
2(the convex volume is ignored at the bottom of the pond of 3 ρ-f)/3, and so, the methane-generating pit cumulative volume is V=V1+V2
Table 1 circulation cloth methane-generating pit geometrical dimension (rice)
The utility model methane-generating pit is mainly residents, and volume is difficult for too big.Application is that organic sewage emission treatment such as peasant household, small-sized plant, small food source mill produce the biogas use.
Water-in and removable cover skylight are shared, and the utility model is not established independent water-in, and the water inlet skylight is that internal diameter is the rectangle that 1 meter the circle or the length of side are 1 meter, its design and mode of construction consistent with traditional hydraulic type biomass pool (Fig. 5).Skylight central authorities are provided with a central water inlet pipe, central authorities' water inlet pipe is a concrete duct that internal diameter is 300mm, concrete duct lowermost end lateral opening size is 200 * 200mm, opening part is over against the water outlet of methane-generating pit, central authorities' cement pipe is placed into the methane-generating pit center, has formed incorporate skylight/water feed apparatus.As seen, the utility model has been cancelled the water-in and the water inlet pipe of traditional methane tank, adopts the skylight water inlet, and central water inlet pipe is used in the water inlet back.Water inlet pipe is the cement pipe that connects the skylight, is the pipeline that treating water enters methane-generating pit, central authorities' water inlet pipe directly enters methane-generating pit bottom central authorities, water inlet pipe internal diameter 300mm, bottom end opening 200 * 200mm, such opening and volute type circulation cloth wall connect, and form the circulation cloth.
About the problem of biogas metal tube position, at methane-generating pit loam cake position a biogas pipe is set, be a metal biogas pipe that is plugged in skylight or gas chamber of marsh gas tank top, this metal tube has constituted the initial joint of biogas.
Circulation cloth wall is the training wall of building on the body of main methane-generating pit convex pond, as shown in Figure 4.The training wall that the structure of this convex is arranged above is the scroll casing shape structure, and its purpose is to cause circulation cloth function, increases the length of cloth current.Distance between the training wall is not a fixed, be to be begun by the water inlet pipe opening, along scroll casing shape structural wall clockwise or that counterclockwise rotate, training wall is begun by the outside of water inlet pipe opening part, central part by methane-generating pit is expanded to the methane-generating pit periphery, and increases radius-of-curvature gradually.The setting of training wall to make raw material by water inlet pipe at methane-generating pit along one week of training wall rotational flow, afterwards more respectively from the exit of training wall along the methane-generating pit inwall forward or backward the unrestricted flow half-turn to the water outlet of methane-generating pit.The scroll casing shape training wall can be provided with clockwise, also can be provided with counterclockwise, and the utility model is recommended to be provided with clockwise.Suppose methane-generating pit is divided into four mathematics quadrants by round dot, as shown in Figure 4, Lower Half at figure is that two scroll casing shape training walls are arranged in third and fourth quadrant, and be to have only a training wall in first and second quadrant at the first half of figure, this wall scroll training wall finishes to 3/5 radius since 2/5 radius.And the quadrant of two training walls appears, and be from the water inlet pipe opening part, through 1/5 place of radius, join to 2/5 place and the wall scroll training wall of radius, the final stage training wall is in the end of radius 4/5 place, joins at 3/5 place and the wall scroll training wall of radius.Training wall is the scroll casing shape structure, thereby has guaranteed the circulation cloth.The water outlet of water inlet pipe is relative with the water outlet position of methane-generating pit, and the scroll casing shape training wall is finishing with respect to methane-generating pit water outlet distal-most end, and the end that is to say the scroll casing shape training wall is the opposite side at the methane-generating pit water outlet.The utility model uses the scroll casing shape training wall of the mobile circle of raw material, and the too short effect of seeming is little to be there is no need with oversize seeming.So training wall length can according to circumstances determine, if the good training wall length of water quality solubility can be grown, if handle the high excrement dirt of SS content such as ight soil, training wall length benefit is short, in order to avoid result in blockage and precipitate.The construction height of scroll casing shape training wall will be higher than methane-generating pit pond body, but is no more than 1/3 of gas chamber of marsh gas tank sagitta, but reference table 1 data.
Be provided with egg tooth (Fig. 4) above the scroll casing shape training wall, the structure of egg tooth is such, and the scroll casing shape training wall is a brick mix structure, and brick is a standard square.The wide 120mm of main body wall, on convex methane-generating pit bottom surface, construct and form, there is not egg tooth in the high 300mm of face wall under the scroll casing shape training wall, promptly from 5 layers of stretcher of the flat block of convex surface, then every 120mm height and edge-on brick of the horizontal block of 120mm strong point, because the long 240mm of brick so edge-on brick stretches out each 60mm of scroll casing shape training wall two sides respectively, thereby forms egg tooth.The egg tooth cross arrangement is staggered.Having only below the scroll casing shape training wall does not need egg tooth in the 300mm, and below the scroll casing shape training wall more than the 300mm, always the cross arrangement egg tooth.Because all there is egg tooth on scroll casing shape training wall two sides, thereby the methane-generating pit crust is abolished automatically.
The methane-generating pit main body is the sealing cement pit of a right cylinder and a hemisphere combination, is gastight tank structure, and the data structure of methane-generating pit right cylinder and episphere sees Table 1, and is consistent with traditional hydraulic type biomass pool, and just water-in and skylight are combined.Cancelled the concave structure of traditional methane tank at the bottom of the pond of methane-generating pit, because be unfavorable for the discharging of natural pond slag like this.Adopt convex structure at the bottom of the utility model methane-generating pit pond, help raw material from the extrorse circulation movement of water-in so on the one hand, exempted the problem that the natural pond slag can not efflux on the other hand at the bottom of the methane-generating pit pond.The rise of the utility model methane-generating pit convex bottom is 200-300mm (seeing Table 1), and circulation is smooth and easy to carry out thereby make.Construction at the bottom of the utility model methane-generating pit pond also has the another one characteristics to be exactly, and one 5% the gradient is arranged at the bottom of the methane-generating pit pond, and this gradient is moved towards the methane-generating pit water outlet, thereby has guaranteed that natural pond liquid and the outside mobile of natural pond slag are unimpeded.Gradient trend by above circulating device and 5% makes to have solved the natural pond slag and efflux problem (accompanying drawing 1).At methane-generating pit outlet 0.5 meter, front a current stabilization wall is set, to guarantee having longer time and effective anaerobic sludge to rest in the methane-generating pit.Current stabilization wall height is 0.5 meter, and length is 2 times of 1/3-water outlet width of methane-generating pit width.
Water outlet is a rectangle mouth of a river in the end setting of methane-generating pit, be positioned at methane-generating pit rear wall central authorities, being the outlet for the treatment of water, below the central authorities of methane-generating pit rear wall end, is a rectangle outlet, exporting wide is 1 meter, coca is decided according to the pressure of methane-generating pit design, and generally speaking, there is distance more than at least 1 meter on the top of water outlet apart from the methane-generating pit top cover, this has constituted the air chamber of circulation cloth methane-generating pit of the present utility model, and guarantees the stable of biogas air pressure.Be to build outside water outlet between water outlet, radius is that 1 meter or length and width respectively are a rectangular parallelepiped pipeline of 1 meter, and height will be higher than water outlet; Water pressure house is the usefulness for the adjusting of aerogenesis hydraulic pressure outside between water outlet, and size is 1/3 of this advection cloth gas chamber of marsh gas tank, and being traditionally arranged to be circle or the length and width that diameter is the methane-generating pit radius is the square of methane-generating pit radius, and the degree of depth is about 1 meter.The water pressure house loam cake need use safety guard, in order to avoid artificial danger is arranged, general safety guard is the cement cover board that there is 1 meter square hole a centre, and square hole is to discharge natural pond slag and natural pond liquid.Natural pond slag and natural pond liquid can be used as fertilizer and use.
Claims (2)
1. a circulation cloth methane-generating pit comprises into water removable cover system, three parts of methane-generating pit main body and water outlet water pressure house system;
It is characterized in that:
Described water inlet removable cover system comprises water-in (skylight) and central water inlet pipe, water inlet system adopts the skylight water inlet, does not establish special water-in, and central water inlet pipe is used in the water inlet back, it is the cement pipe that connects the skylight, and central water inlet pipe directly enters methane-generating pit bottom central authorities;
Described methane-generating pit main body is the closed tank body of a spherical, is divided into two parts, the one, and first spheroid of methane-generating pit, the one, methane-generating pit right cylinder;
Described water outlet water pressure house system has between water outlet, water outlet and water pressure house;
2. circulation cloth methane-generating pit according to claim 1, it is characterized in that not adopting recessed semisphere bottom the methane-generating pit, but adopt the slightly structure of convex, arrange the training wall of a scroll casing shape above the structure of this convex, be provided with egg tooth above the scroll casing shape training wall, purpose is to cause circulation cloth function, increases cloth current length, and strengthen waterpower flow range and the mixing that increases waste water, and automatically terminate formed top layer crust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201886965U CN201250232Y (en) | 2008-08-15 | 2008-08-15 | Biogas pool with circulated material distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201886965U CN201250232Y (en) | 2008-08-15 | 2008-08-15 | Biogas pool with circulated material distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201250232Y true CN201250232Y (en) | 2009-06-03 |
Family
ID=40745904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201886965U Expired - Fee Related CN201250232Y (en) | 2008-08-15 | 2008-08-15 | Biogas pool with circulated material distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201250232Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820308A (en) * | 2013-11-29 | 2014-05-28 | 廖佳袁 | Novel methane generation device |
| CN105036327A (en) * | 2015-09-23 | 2015-11-11 | 农业部沼气科学研究所 | Household domestic sewage purification device |
-
2008
- 2008-08-15 CN CNU2008201886965U patent/CN201250232Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103820308A (en) * | 2013-11-29 | 2014-05-28 | 廖佳袁 | Novel methane generation device |
| CN105036327A (en) * | 2015-09-23 | 2015-11-11 | 农业部沼气科学研究所 | Household domestic sewage purification device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104649530B (en) | A kind of aquaculture processes the method that excrement is dirty | |
| CN104073431B (en) | A kind of methane-generating pit of new structure | |
| CN201296752Y (en) | Turbulent-flow biogas tank | |
| CN112625873A (en) | Two-phase dry anaerobic digestion fermentation system | |
| CN201250232Y (en) | Biogas pool with circulated material distribution | |
| CN104710092A (en) | Plastic steel biogas septic tank | |
| CN101402912B (en) | Self-mixing anaerobic reactor | |
| CN201250233Y (en) | Tunnel biogas pool with water return on the top | |
| CN111392839A (en) | MAP fluidized bed for removing ammonia nitrogen and phosphate | |
| CN201785384U (en) | Deflection tunnel type methane tank | |
| CN201296753Y (en) | Horizontal-flow biogas tank | |
| CN209824860U (en) | Rice field circulating water high density farming systems | |
| CN212374974U (en) | MAP fluidized bed for removing ammonia nitrogen and phosphate | |
| CN203820782U (en) | Self-sealing shell-breaking and stirring biogas digester | |
| CN102746985A (en) | Straw methane fermenting pool | |
| CN101698855A (en) | Two-tank double-fermentation method of methane and methane tank | |
| CN206089670U (en) | Feed liquid circulation fluidization fermenting installation | |
| CN103087902B (en) | Automatic crusting-breaking gas producing and storing wet type integrated anaerobic fermentation device | |
| CN207072943U (en) | A kind of meandering distribution type automatic-discharging methane-generating pit utilization system | |
| CN201439525U (en) | Hemispheric steam transposition biomass pool | |
| CN201305530Y (en) | Honeycomb type biogas anaerobic digestion system | |
| CN201416005Y (en) | Inner top pressure type ball-shaped biogas digester | |
| CN205616748U (en) | Novel biogas fermentation system of plant | |
| CN101654688B (en) | Device for efficiently producing marsh gas | |
| CN203222587U (en) | Double-water-pressure-room biogas digester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20090603 Termination date: 20090915 |