CN203668386U - Biogas anaerobic fermentation and storage system - Google Patents
Biogas anaerobic fermentation and storage system Download PDFInfo
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- CN203668386U CN203668386U CN201320731276.8U CN201320731276U CN203668386U CN 203668386 U CN203668386 U CN 203668386U CN 201320731276 U CN201320731276 U CN 201320731276U CN 203668386 U CN203668386 U CN 203668386U
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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
- 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
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
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Abstract
A biogas anaerobic fermentation and storage system comprises a controllable header type fermentation chamber, a desulfurizer and a gas storage holder which are connected in sequence through high-pressure gas pipes, wherein flowmeters, pressure gauges and valves are arranged on the high-pressure gas pipes; the controllable header type fermentation chamber comprises a cylinderical box body with an open top; a corrosion-resistant heat insulating material layer is arranged on the inner wall of the box body; the upper part on one side of the box body is connected with a feed pipe; a discharge pipe is arranged at the lower part on the other side of the box body and in a biogas liquid outlet; a temperature sensor stuck in the box body is arranged in the middle of the box body. The biogas anaerobic fermentation and storage system is reasonable in design, simple in structure and high in gas tightness, can uniformly stir sewage and dejecta in an anaerobic fermentation process, is helpful to improve anaerobic fermentation efficiency and biogas yield, has high practicability and is easy to popularize and apply.
Description
Technical field
The utility model belongs to biogas utilization technical field, relates in particular to a kind of biogas anaerobic fermentation stocking system.
Background technology
Biogas be organic substance under anaerobic, a kind of mixed gas generating through the fermentative action of microorganism.Because this gas is swampy at first, so be called biogas.The various organism such as human and animal excreta, stalk, sewage in airtight methane-generating pit, at anaerobism (there is no oxygen) condition bottom fermentation, the methane fermentating microorganism decomposition and inversion that class is various, thereby produce biogas.Biogas is a kind of mixed gas, can burn.Biogas is the inflammable gas that organism produces through microbiological anaerobic digestion.
Biogas is the mixture of multiple gases, and generally, containing methane 50～70%, all the other are carbonic acid gas and a small amount of nitrogen, hydrogen and hydrogen sulfide etc.Its characteristic is similar to Sweet natural gas.In air as contain 8.6～20.8%(by volume) biogas time, will form volatile mixed gas.Biogas except direct burning for cooking, dry agricultural byproducts, heating, illumination and gas welding etc., also can make the industrial chemicals such as the fuel of oil engine and methanol, formalin, tetracol phenixin.Feed liquid and the sediment of after firedamp gas equipment fermentation, discharging, contain more rich nutritive substance, can be used as fertilizer and feed.
Biogas is some organic substances, and under certain temperature, humidity, acidity condition, isolated air (as with methane-generating pit), through microbial process (fermentation) and the inflammable gas of generation.It contains a small amount of hydrogen sulfide, so stink slightly.Fermentation is complicated biochemical change, has many microorganisms to participate in.Reaction roughly divides two stages: (1) microorganism becomes simple material the carbohydrate in complicated organic substance, fat, protein degradation, as lower fatty acid, alcohol, aldehyde, carbonic acid gas, ammonia, hydrogen and hydrogen sulfide etc.(2), by the effect of methane bacterial classification, make some simple materials become methane.To normally produce biogas, be necessary for microorganism and create good condition, make it can survive, breed.Methane-generating pit must meet multiple condition.First, methane-generating pit is airtight.Organic substance is fermented into biogas, is the result of multiple anerobe activity, therefore will cause the anaerobic environment of an anerobe activity.To note isolated air building when methane-generating pit, airtight, do not seep water.Secondly, in methane-generating pit, to maintain 20～40 ℃ because conventionally at this temperature factor of created gase the highest.The 3rd, methane-generating pit will have sufficient nutrient.Microorganism will survive, breed, and must from fermented material, draw nutrient.In the fermentation raw material of methane-generating pit, human and animal excreta can provide nitrogen element, and the Mierocrystalline celluloses such as the stalk of farm crop can provide carbon.The 4th, fermentation raw material will contain suitable quantity of water, and moisture 80% left and right in the fermentation raw material of general requirement methane-generating pit is too much or very few all unfavorable to aerogenesis.The 5th, the pH value general control of methane-generating pit is 7～8.5.
In the last few years, biogas was progressively promoted and was come in vast rural area as a kind of clean energy, had following effect for rural area: (1) biogas can not only solve rural energy problem, and can increase Organic Fertilizer Resources, improve quality and increase fertilizer efficiency, thereby improve crop yield, improvement soil; (2) use biogas, can save in a large number the organism such as stalk, hay, to be used for producing animal feed and as paper making raw material and handicraft starting material; (3) set up biogas and can reduce the phenomenon of haggling trees and disorderly stripping vegetation, protection vegetation, makes agricultural production system progressively to cycle development; (4) set up biogas, be conducive to the generation of environment purification and minimizing disease.This is that the germ mortality in human and animal excreta, improves environmental health condition because in methane-generating pit fermentative processing process; (5) with the biogas illumination of cooking, both saved household economy spending, the work time of saving again housewife, reduce labour intensity; (6) use natural pond fertilizer, improve agricultural product quality and quality, increase income, reduce agricultural pollution, for Agricultural product without pollution lays the foundation.Conventional material cycle utilize the type ecosystem mainly contain plant husbandry-aquaculture-biogas engineering three in conjunction with, aquaculture-fishery-plant husbandry three in conjunction with and the type such as the ecological engineering of aquaculture-fishery-forestry three combinations.It is the most general that wherein the material cycle of plant husbandry-aquaculture-biogas engineering three combinations is utilized the application of type ecological engineering, and effect is best, also applies wider.
But the raw material in the anaerobically fermenting pond in existing biogas fermentation treatment system exists and stirs inhomogeneous problem, makes raw material not carry out fully anaerobically fermenting operation, and this just has influence on biogas production efficiency and biogas output.In addition, the gas storage holder sealing effectiveness storing for biogas is poor, easily produces gas leakage, and the standing storage that has influence on biogas is used.
Utility model content
The utility model is in order to solve weak point of the prior art, the biogas anaerobic fermentation stocking system that provide a kind of and stir, biogas output is high.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: biogas anaerobic fermentation stocking system, comprise the controlled cluster case type proving room connecting by high-pressure air pipe successively, devulcanizer and gas storage holder, high-pressure air pipe is provided with under meter, tensimeter and valve, controlled cluster case type proving room is provided with hot water inlet, methane outlet, natural pond liquid outlet and natural pond liquid refluxing opening, described controlled cluster case type proving room comprises the cylindrical circular casing of open top, described cabinet wall is provided with corrosion-resistant adiabator layer, one upper lateral part of casing is connected with feed-pipe, the opposite side bottom of casing is provided with discharge nozzle, discharge nozzle is located in the liquid outlet of natural pond, casing middle part is provided with the temperature sensor extending in casing,
Casing top is provided with cover plate, cover plate is provided with the motor and speed reducer being in transmission connection, step-down gear is located at cover plate middle part, motor is located on step-down gear, the power wheel drive end of step-down gear is connected with the stir shaft that vertically stretches to box house, stir shaft is provided with at least agitator arm of one deck, all arrange vertical with stir shaft of every agitator arm, and upper surface and the lower surface of agitator arm are respectively equipped with agitating vane;
Methane outlet and natural pond liquid refluxing opening are established on the cover board; On cover plate, be connected with hot water inlet pipe and biogas and go out pipe, biogas goes out pipe and is located in methane outlet, offers porthole on cover plate, on cover plate, is provided with at porthole place the sealing cover being hinged with for opening and closing porthole, and sealing cover is provided with handle;
Feed-pipe, discharge nozzle, biogas go out on pipe and hot water inlet pipe to be equipped with the valve being positioned at outside casing.
Described cover plate lower surface is provided with the position limiting sealed rib of annular, the outer wall of position limiting sealed rib contacts with corrosion-resistant adiabator layer inwall, between cover plate lower surface and casing upper surface, be provided with the sealed bolster plate of annular, sealed bolster plate is made by playing flexible materials, and sealed bolster plate is positioned at position limiting sealed rib outside.
Described lower box is radially provided with two and is cross-shaped backstay, two backstays be provided with cylinder in its right-angled intersection place, cylinder overlaps with the medullary ray of casing, bearing is installed in cylinder, stir shaft is located in the inner ring of bearing, bearing upside and downside are equipped with lock packing, and wherein one deck agitating vane is positioned at the below of two backstays.
Adopt technique scheme, the gas storage holder of biogas anaerobic fermentation stocking system comprises the uncovered expansion box of water tank and bottom of open top, water tank and expansion box are all cylindrical, the external diameter of expansion box is less than the internal diameter of water tank, in water tank, be loaded with water, the downward opening of expansion box is buckled in water, expansion box top is provided with escape pipe and pressure transmitter, water tank bottom is provided with the inlet pipe that extend into expansion box top, the top of water tank inwall is provided with baffle plate, the bottom of expansion box outer wall is provided with the limiting plate upper and lower corresponding with baffle plate, bottom in water tank is provided with the hound for fixing inlet pipe.
The inwall of described water tank offers four slideways vertically; Every slideway all with the upper and lower staggered arrangement of baffle plate, four slideways are circumferentially evenly arranged along water tank, expansion box middle part outer wall is along being circumferentially evenly provided with four anchors, the outer end of each anchor is respectively equipped with along two rollers that roll in a slideway.
Described water tank bottom is provided with at least two limited posts, and the lower surface of expansion box is provided with the limited block upper and lower corresponding with limited post.
Between the lower surface of described limiting plate and expansion box outer wall, be provided with the first reinforcement gusset, between the upper surface of baffle plate and water tank inwall, be provided with the second reinforcement gusset.
Sewage ight soil is entered in casing by feed-pipe, is discharged by discharge nozzle.Motor via reducer drives stir shaft to rotate, agitator arm on stir shaft stirs sewage ight soil, agitating vane on agitator arm upper surface and lower surface plays the effect that improves mixing effect, because stir shaft is long, the stir shaft that is arranged in stir shaft bottom just there will be swing at rotation process, will have influence on like this being well rotatably assorted between stir shaft and cover plate, therefore the backstay of right-angled intersection is set at lower box, cylindrical shell in the middle of backstay plays solid bearing and the effect of lock packing is installed, stir shaft is located in the inner ring of bearing, so just play good positioning action, stop the swing of stir shaft bottom.
Material, in anaerobic fermentation process, need to add hot water in sewage ight soil, is added hot water and is passed through the temperature in temperature sensor monitors casing, to improve anaerobically fermenting efficiency by hot water inlet pipe.Porthole is used for observing anaerobically fermenting situation in casing, and sealing cover plays good sealing function.In anaerobic fermentation process, biogas goes out the valve opening on pipe, make like this biogas producing discharge continuously, valve on feed-pipe, discharge nozzle and hot water inlet pipe, all in closing condition, needs charging, the valve of just performing fighting on feed-pipe, need discharging, just open the valve on discharge nozzle, if desired heating water, just opens the valve on hot water inlet pipe.
Sealed bolster plate and position limiting sealed rib play good sealing function, so not only prevent that the foul smell in casing from overflowing, and the environment of a kind of sealed thermal insulating of prior creation, improves the efficiency of anaerobically fermenting, and then improve the turnout of biogas.Corrosion-resistant adiabator layer plays good heat insulation effect, to prevent that the temperature in casing from declining very soon.
Gas storage holder adopts watertight construction, when biogas is entered in expansion box and stored by inlet pipe, in the time that the air pressure in expansion box progressively increases, expansion box floating, float to after certain position, limiting plate expansion box under the stopping of baffle plate no longer floats, and now just the biogas in expansion box need to be discharged, when the air pressure in expansion box reduces, expansion box will sink.Water is by the end opening sealing of expansion box, simple in structure, good sealing effect.Hound guarantees that inlet pipe keeps vertical state.Roller moves up and down along the slideway on water tank inwall, plays good guide effect, avoids expansion box to rock all around, and two rollers of upper and lower correspondence are set on each anchor, can avoid like this expansion box to move up and down time, occurs tilting.Water tank bottom limited post, the cooperation between the limited block on the lower surface of expansion box, while avoiding expansion box internal pressure too small, expansion box touches hound or water tank bottom.The first reinforcement gusset and second is strengthened gusset and is played respectively the effect that strengthens limiting plate and baffle plate intensity.Pressure transmitter is for monitoring the effect of expansion box internal pressure.
Gas in the utility model gas storage holder can generate electricity and biogas heating unit heats, warms oneself, cooks, bathing etc. by biogas electricity generation apparatus.
The taking-up of the natural pond slag in casing adopts raises cover plate and takes out, and natural pond liquid is discharged by the discharge nozzle on casing, and natural pond liquid can directly apply field by field irrigation, after also can heating again, is entered into and in casing, is carried out circulation anaerobic fermentation operation by natural pond liquid refluxing opening.
The utility model is reasonable in design, simple in structure, good airproof performance, the sewage ight soil in anaerobic fermentation process is stirred, and contributes to improve anaerobically fermenting efficiency and biogas output, practical, is easy to apply.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of controlled cluster case type proving room in the middle of Fig. 1;
Fig. 3 is the structural representation of gas storage holder in the middle of Fig. 1.
Embodiment
As Fig. 1, shown in Fig. 2 and Fig. 3, biogas anaerobic fermentation stocking system of the present utility model, comprise the controlled cluster case type proving room 30 connecting by high-pressure air pipe 29 successively, devulcanizer 28 and gas storage holder 27, high-pressure air pipe 29 is provided with under meter 24, tensimeter 26 and valve 25, controlled cluster case type proving room 30 is provided with hot water inlet, methane outlet, natural pond liquid outlet and natural pond liquid refluxing opening, controlled cluster case type proving room 30 comprises the cylindrical circular casing 1 of open top, described casing 1 inwall is provided with corrosion-resistant adiabator layer 2, one upper lateral part of casing 1 is connected with feed-pipe 3, the opposite side bottom of casing 1 is provided with discharge nozzle 4, discharge nozzle 4 is located in the liquid outlet of natural pond, casing 1 middle part is provided with the temperature sensor 5 extending in casing 1,
Methane outlet and natural pond liquid refluxing opening are established on the cover board; On cover plate 6, be connected with hot water inlet pipe 12 and biogas and go out pipe 13, biogas goes out pipe 13 and is located in methane outlet, on cover plate 6, offer porthole 14, on cover plate 6, be provided with at porthole 14 places the sealing cover 15 being hinged with for opening and closing porthole 14, sealing cover 15 is provided with handle 16;
Feed-pipe 3, discharge nozzle 4, biogas go out on pipe 13 and hot water inlet pipe 12 to be equipped with the valve 17 being positioned at outside casing 1.
Gas storage holder comprises the uncovered expansion box 32 of water tank 31 and bottom of open top, water tank 31 and expansion box 32 are all cylindrical, the external diameter of expansion box 32 is less than the internal diameter of water tank 31, in water tank 31, be loaded with water, the downward opening of expansion box 32 is buckled in water, expansion box 32 tops are provided with escape pipe 33 and pressure transmitter 34, escape pipe 33 is connected with the 3rd tracheae 17 and the 4th tracheae 18, water tank 31 bottoms are provided with the inlet pipe 35 that extend into expansion box 32 tops, the top of water tank 31 inwalls is provided with baffle plate 36, the bottom of expansion box 32 outer walls is provided with and baffle plate corresponding limiting plate 37 Shang Xia 36, bottom in water tank 31 is provided with the hound 38 for fixing inlet pipe 35, guarantee that inlet pipe 35 keeps vertical state.
The inwall of water tank 31 offers four slideways 40 vertically; Every slideway 40 all with baffle plate staggered arrangement Shang Xia 36, article four, slideway 40 is circumferentially evenly arranged along water tank 31, expansion box 32 middle part outer walls are along being circumferentially evenly provided with four anchors 41, and the outer end of each anchor 41 is respectively equipped with two rollers 42 along slideway 40 interior rollings.
Between the lower surface of limiting plate 37 and expansion box 32 outer walls, be provided with the first reinforcement gusset 45, between the upper surface of baffle plate 36 and water tank 31 inwalls, be provided with the second reinforcement gusset 46.
The utility model is in the time that work is used, the motor 7 of controlled cluster case type proving room 30 drives stir shaft 9 to rotate by step-down gear 8, agitating vane 11 on stir shaft 9 stirs the sewage ight soil in casing 1, improve the effect of anaerobically fermenting, thereby raising biogas output, the biogas producing enters into and in devulcanizer 31, carries out desulfurization, is then being stored in the middle of gas storage holder 32.Devulcanizer 31 is existing mature technology, and concrete structure repeats no more.
Sewage ight soil is entered in casing 1 by feed-pipe 3, is discharged by discharge nozzle 4.Motor 7 drives stir shaft 9 to rotate by step-down gear 8, agitator arm 10 on stir shaft 9 stirs sewage ight soil, agitating vane 11 on agitator arm 10 upper surfaces and lower surface plays the effect that improves mixing effect, because stir shaft 9 is long, the stir shaft 9 that is arranged in stir shaft 9 bottoms just there will be swing at rotation process, will have influence on like this being well rotatably assorted between stir shaft 9 and cover plate 6, therefore the backstay 20 of right-angled intersection is set in casing 1 bottom, cylindrical shell in the middle of backstay 20 plays solid bearing 22 and the effect of lock packing 23 is installed, stir shaft 9 is located in the inner ring of bearing 22, so just play good positioning action, stop the swing of stir shaft 9 bottoms.
Material, in anaerobic fermentation process, need to add hot water in sewage ight soil, is added hot water and is monitored the temperature in casing 1 by temperature sensor 5, to improve anaerobically fermenting efficiency by hot water inlet pipe 12.Porthole 14 is for observing the interior anaerobically fermenting situation of casing 1, and sealing cover 15 plays good sealing function.
In anaerobic fermentation process, the valve 17 that biogas goes out on pipe 13 is opened, make like this biogas producing discharge continuously, valve 17 on feed-pipe 3, discharge nozzle 4 and hot water inlet pipe 12, all in closing condition, needs charging, the valve 17 of just performing fighting on feed-pipe 3, need discharging, just open the valve 17 on discharge nozzle 4, if desired heating water, just opens the valve 17 on hot water inlet pipe 12.
Sealed bolster plate 19 and position limiting sealed rib 18 play good sealing function, so not only prevent that the foul smell in casing 1 from overflowing, and the environment of a kind of sealed thermal insulating of prior creation, improves the efficiency of anaerobically fermenting, and then improve the turnout of biogas.Corrosion-resistant adiabator layer 2 plays good heat insulation effect, to prevent that the temperature in casing 1 from declining very soon.
When biogas enters into the interior storage of expansion box 32 by inlet pipe 35, in the time that the air pressure in expansion box 32 progressively increases, expansion box 32 floats, float to after certain position, limiting plate 37 expansion box 32 under the stopping of baffle plate 36 no longer floats, now just the biogas in expansion box 32 need to be discharged, when the air pressure in expansion box 32 reduces, expansion box 32 will sink.Water is by the end opening sealing of expansion box 32, simple in structure, good sealing effect.Hound 38 guarantees that inlet pipe 35 keeps vertical state.Roller 42 moves up and down along the slideway 40 on water tank 31 inwalls, play good guide effect, avoid expansion box 32 to rock all around, two rollers 42 of upper and lower correspondence are set on each anchor 41, can avoid like this expansion box 32 to move up and down time, occur tilting.Water tank 31 bottom limited posts 43, the cooperation between the limited block 44 on the lower surface of expansion box 32, avoids expansion box 32 internal pressures when too small, and expansion box 32 touches hound 38 or water tank 31 bottoms.The first reinforcement gusset 45 and second is strengthened gusset 46 and is played respectively the effect that strengthens limiting plate 37 and baffle plate 36 intensity.Pressure transmitter 34 is for monitoring the effect of expansion box internal pressure.
The natural pond liquid that the utility model produces and natural pond slag directly as fertilizer sources apply field, also can adopt series of process to produce fertilizer.The taking-up employing of the natural pond slag in casing 1 is raised cover plate 6 and is taken out, natural pond liquid is discharged by the discharge nozzle 4 on casing 1, natural pond liquid can directly apply field by field irrigation, after also can heating again, is entered into and in casing 1, is carried out circulation anaerobic fermentation operation by natural pond liquid refluxing opening.
The present embodiment is not done any pro forma restriction to shape of the present utility model, material, structure etc.; any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all belong to the protection domain of technical solutions of the utility model.
Claims (3)
1. biogas anaerobic fermentation stocking system, comprise the controlled cluster case type proving room connecting by high-pressure air pipe successively, devulcanizer and gas storage holder, high-pressure air pipe is provided with under meter, tensimeter and valve, controlled cluster case type proving room is provided with hot water inlet, methane outlet, natural pond liquid outlet and natural pond liquid refluxing opening, it is characterized in that: described controlled cluster case type proving room comprises the cylindrical circular casing of open top, described cabinet wall is provided with corrosion-resistant adiabator layer, one upper lateral part of casing is connected with feed-pipe, the opposite side bottom of casing is provided with discharge nozzle, discharge nozzle is located in the liquid outlet of natural pond, casing middle part is provided with the temperature sensor extending in casing,
Casing top is provided with cover plate, cover plate is provided with the motor and speed reducer being in transmission connection, step-down gear is located at cover plate middle part, motor is located on step-down gear, the power wheel drive end of step-down gear is connected with the stir shaft that vertically stretches to box house, stir shaft is provided with at least agitator arm of one deck, all arrange vertical with stir shaft of every agitator arm, and upper surface and the lower surface of agitator arm are respectively equipped with agitating vane;
Methane outlet and natural pond liquid refluxing opening are established on the cover board; On cover plate, be connected with hot water inlet pipe and biogas and go out pipe, biogas goes out pipe and is located in methane outlet, offers porthole on cover plate, on cover plate, is provided with at porthole place the sealing cover being hinged with for opening and closing porthole, and sealing cover is provided with handle;
Feed-pipe, discharge nozzle, biogas go out on pipe and hot water inlet pipe to be equipped with the valve being positioned at outside casing.
2. biogas anaerobic fermentation stocking system according to claim 1, it is characterized in that: described cover plate lower surface is provided with the position limiting sealed rib of annular, the outer wall of position limiting sealed rib contacts with corrosion-resistant adiabator layer inwall, between cover plate lower surface and casing upper surface, be provided with the sealed bolster plate of annular, sealed bolster plate is made by playing flexible materials, and sealed bolster plate is positioned at position limiting sealed rib outside.
3. biogas anaerobic fermentation stocking system according to claim 1 and 2, it is characterized in that: described lower box is radially provided with two and is cross-shaped backstay, two backstays be provided with cylinder in its right-angled intersection place, cylinder overlaps with the medullary ray of casing, bearing is installed in cylinder, stir shaft is located in the inner ring of bearing, and bearing upside and downside are equipped with lock packing, and wherein one deck agitating vane is positioned at the below of two backstays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320731276.8U CN203668386U (en) | 2013-11-19 | 2013-11-19 | Biogas anaerobic fermentation and storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320731276.8U CN203668386U (en) | 2013-11-19 | 2013-11-19 | Biogas anaerobic fermentation and storage system |
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| CN203668386U true CN203668386U (en) | 2014-06-25 |
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| CN201320731276.8U Expired - Fee Related CN203668386U (en) | 2013-11-19 | 2013-11-19 | Biogas anaerobic fermentation and storage system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140625 Termination date: 20141119 |
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