CN106399065B - A kind of plastic jacket biogas cellar of two-part continuous flow anaerobic fermentation - Google Patents
A kind of plastic jacket biogas cellar of two-part continuous flow anaerobic fermentation Download PDFInfo
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- CN106399065B CN106399065B CN201610857549.1A CN201610857549A CN106399065B CN 106399065 B CN106399065 B CN 106399065B CN 201610857549 A CN201610857549 A CN 201610857549A CN 106399065 B CN106399065 B CN 106399065B
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/34—Internal compartments or partitions
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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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Abstract
The invention discloses a kind of plastic jacket biogas of two-part continuous flow anaerobic fermentation cellars, it is characterised in that: including feed space, level-one cellar, second level cellar, discharge room, level-one plastic jacket, second level plastic jacket and isolating door；The level-one plastic jacket closes the top at the level-one cellar, and the second level plastic jacket closes the top at the second level cellar；It is in communication with the outside at the top of the feed space, is in communication with the outside at the top of the discharge room；The isolating door is movably articulated in the side of the intercommunicating pore, and the positive and negative two sides of the isolating door are respectively equipped with the enabling rope for leading to outside and rope of closing the door；By pulling the positive enabling rope of the isolating door or rope of closing the door, which can be opened or closed.Feed space, level-one cellar, second level cellar, discharge room are designed as four separate spaces for not only separating but also being connected to by the present invention, and isolating door and movable plate movement are driven by storing outer drawstring, it can reach the operation such as charging, stirring, discharge, it is simple and easy to do, there is very high promotional value.
Description
Technical field
The present invention relates to a kind of biogas to store structure, more particularly to a kind of plastic jacket natural pond of two-part continuous flow anaerobic fermentation
Gas cellar.
Background technique
Being both various countries using the raw materials such as form garbage and dejection manufacture biogas utilizes the outlet of sustainable energy development and sustainable
Developing agricultural, the important measures preserved the ecological environment.Efficiency, economic benefit and the universalness degree of biogas production are all by biogas
Store the limitation of the conditions such as building cost and the operation maintenance trouble in (pond).
Developing country is often stored with biogas at present, and most common is the fixed dome biogas cellar of Chinese style, followed by yoga
Floating cover biogas cellar.Above two biogas cellar has cost partially expensive, and operation without mixing and the later period that arrives produce that gas is few, the behaviour of charging and discharging
It is not convenient enough to make；The space of charging and discharging is easy gas leakage, while Chinese style dome biogas cellar cost is high and its dome is easy
Generate crack gas leakage, the floating cover cost that yoga floats cover biogas cellar is not low and floating cover and floating cover periphery are easy gas leakage, these gas leakage
It does not only result in be not achieved and produces the effect that biogas makes full use of, and lead to the serious consequence to pollute the atmosphere；And these are traditional
The maintenance of biogas cellar and operation are all not convenient enough.The anaerobic ferment devices of various countries can be divided mainly into three classes, batch anaerobic digestion device
(Batch reactors), single-phase continuous flow anaerobic digestion device (One stage continuously fed system) with
And two-phase (two sections) or multiphase continuous flow anaerobic digester system (Two stage or Multi-stage continuously
fed system).Wherein two sections or multiphase continuous flow anaerobic digester system it is most advanced.
It is still a kind of that biogas cellars all at present, which can only all carry out one kind with storing interior naturally pH value or being overregulated,
The anaerobic fermentation of pH value ferments to front and back batch feed and produces due to that can only carry out a kind of fermentation of pH value in a cellar
Biogas is there are serious mutual limitation gas-forming reaction, and raw feed starts to carry out acid-producing, these acid can inhibit the needs of clinker
The reaction of meta-alkali condition production biogas.Acid is produced to the adverse effect of clinker production biogas to solve raw feed, and people use two
The method that cellar carries out two phase anaerobic fermentation specially makees acid-producing to raw feed with a cellar and also produces a small amount of biogas, then production
The material of acid after reaction is transferred into the cellar of another meta-alkali condition, highly effective methane-producing.Obviously this two phase anaerobic fermentation
Method has the shortcomings that big energy-consuming and operation and equipment are complicated.
Summary of the invention
It is an object of the invention to overcome the deficiency of the prior art, provides a kind of plastics of two-part continuous flow anaerobic fermentation
Feed space, level-one cellar, second level cellar, discharge room are designed as by cover biogas cellar in the structure basis at original plastic jacket biogas cellar
Not only four separate spaces of connection again had been separated, and had been moved by storing outer drawstring drive isolating door and movable plate, that is, can reach charging,
The operation such as stirring, discharge, it is simple and easy to do, there is very high promotional value.
The technical solution adopted by the present invention to solve the technical problems is: a kind of plastics of two-part continuous flow anaerobic fermentation
Cover biogas cellar, including feed space, level-one cellar, second level cellar, discharge room, level-one plastic jacket, second level plastic jacket and isolating door；
The bottom of the feed space is connected with level-one cellar, and the second level cellar is connected with the discharge room, described
Level-one cellar and second level cellar are mutually conducted by an intercommunicating pore, and the level-one plastic jacket closes the top at the level-one cellar, institute
State the top that second level plastic jacket closes the second level cellar；It is in communication with the outside at the top of the feed space, the top of the discharge room
It is in communication with the outside；
The isolating door is movably articulated in the side of the intercommunicating pore, and the positive and negative two sides of the isolating door are respectively equipped with
Lead to the enabling rope in outside and rope of closing the door；By pulling the positive enabling rope of the isolating door, which can be opened, be passed through
The shutdown rope of the isolating door reverse side is pulled, which can be closed.
As a preference, further including guide rail component, movable plate and pulling plate rope；The guide rail component is set to the second level
In cellar, and stores along the level-one to the direction of the discharge room and be arranged；The movable plate is slideably secured to the guide rail structure
Part, the pulling plate rope are stored across the second level, and one end of the pulling plate rope is set to the second level and stores the side close to level-one cellar, institute
The other end for stating pulling plate rope is set to the second level and stores close to the other side of discharge room, by pulling the pulling plate rope, can control institute
Movable plate is stated to slide along the guide rail component.
As a preference, the guide rail component includes main guide rail and two bottom guide tracks, the main guide rail is set to institute
State the middle part at second level cellar, two sides of the bottom at the cellar of second level described in two bottom guide tracks；The middle part of the movable plate, which is equipped with, to be slided
Rod aperture, the sliding rod hole are set in the main guide rail.
As a preference, two sides of the bottom of the movable plate, which are equipped with two, is slidably matched with the bottom guide track
Movable span；The edge of the movable span is equipped with the springlock for connecting and fixing.
As a preference, further including out cover rope and several sleeving connecting rods；The level-one plastic jacket and the second level plastics
The edge suture of cover is equipped with set seam, and the level-one is stored and the side wall at second level cellar is arranged at intervals with several grooves along the vertical direction,
Spring member is equipped in the groove；The set seam is set in the groove by the sleeving connecting rod；Described one end for opening cover rope is solid
It is connected to the bottom end of the sleeving connecting rod, the other end passes through the bottom of the groove, and the end that can be pullled is formed around to outside.
As a preference, the level-one plastic jacket and second level plastic jacket are red soil soft plastic material.
As a preference, the bottom at the level-one cellar is to store the inclined arc in direction to the second level along the feed space
Face.
As a preference, the bottom at the level-one cellar is equipped with the sediment ejection opening being in communication with the outside.
As a preference, further including short sliding door rope；The movable plate is equipped with side and opens plate, which opens the positive and anti-of plate
Face passes through two sections short sliding door rope respectively and is fixed on the pulling plate rope, and by pulling the pulling plate rope that the side can be made to open plate completion
Folding.
As a preference, the movable plate is two, and two movable plates are equipped with the side and open plate；Pass through setting
The side of two movable plates open the short sliding door rope on plate length and fixed position, so that the side of two movable plates is opened plate can be according to
It is secondary to open or close.
The beneficial effects of the present invention are:
1, the feed space, level-one cellar, second level cellar, discharge room were not only separated but also were connected to, and by storing outer drawstring band
It is easy to operation that dynamic isolating door and movable plate movement reach charging, stirring, discharge etc..
2, level-one cellar floor design is at cambered surface, and feed space bottom surface is that inclined-plane connects with cambered surface, and mixed raw material can be made quick
It is directly entered in level-one cellar；Level-one is stored bottom setting desilting and is exported, convenient for the precipitating and row of sandstone in raw material and metal substance
It removes.
3, feed space and level-one are stored and second level cellar is this be connected to design, but between this input and output material above can carry out to level-one cellar
The operation of two-part continuous flow anaerobic fermentation is very easily completed in the measurement and adjusting of the pH value and temperature of interior fermentation material.
4, it is locked by several Jiao Bi and plastic jacket and Jiao Bi is closely connected as one by groove, fermenting raw materials generate gas
Pressure effect, more make with plastic jacket with cellar body inner wall is close to so that raw material and outside air isolation, to reach good
Anaerobic fermentation conditions.It can be convenient by opening cover rope entire plastic jacket is separated with cellar body, operator can enter cellar body
Every operation such as inside installed, cleaned, sterilized, replaced and repaired.
5, by feed space, level-one cellar, second level cellar, discharge room not only separate again connection and movable doorboard help into
Discharging stirring, plastic jacket and the design for opening the auxiliary equipments such as cover rope, not only stir pH value and temperature measuring and adjusting, input and output material
It is convenient and simplify fermentation operations, the maintenance operation etc. such as to mix, and complete equipment structure is simple, low cost makes peasant one
See will, be conducive to marketing.
Invention is further described in detail with reference to the accompanying drawings and embodiments；But a kind of two-part of the invention is continuous
The plastic jacket biogas cellar of stream anaerobic fermentation is not limited to the embodiment.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the fixed structure schematic diagram one (front view) of plastic jacket and second level cellar of the invention；
Fig. 3 is the fixed structure schematic diagram two (side view) of plastic jacket and second level cellar of the invention；
Fig. 4 is the structural schematic diagram at level-one cellar of the invention；
Fig. 5 is the structural schematic diagram one at second level cellar of the invention；
Fig. 6 is the structural schematic diagram two at second level cellar of the invention；
Fig. 7 is the side schematic view of movable plate of the invention.
Wherein: 11, feed space, 12, level-one cellar, 121, arcwall face, 122, sediment ejection opening, 13, second level cellar, 14, discharge room,
15, the first intercommunicating pore, the 16, second intercommunicating pore；
21, level-one plastic jacket, 22, second level plastic jacket, 23, sleeving connecting rod, 24, spring member, 25, leading block, 26, open cover
Rope, 27, tension pulley block, 28, groove；
3, isolating door, 31, enabling rope, 32, rope of closing the door；41, main guide rail, 42, bottom guide track；
5, movable plate, 51, side open plate, 52, springlock, 53, guide rail through-hole, 54, rope through, 55, pulling plate pulley；
6, pulling plate rope, the 61, first short sliding door rope, the 62, second short sliding door rope；
Specific embodiment
Embodiment:
Progress is stored below in conjunction with a kind of plastic jacket biogas of 1 to 7 pair of attached drawing two-part continuous flow anaerobic fermentation of the invention
Explanation.
The main body at plastic jacket biogas cellar of the invention is four cavities of reinforced concrete, including feed space 11, level-one cellar
12, second level cellar 13, discharge room 14, level-one plastic jacket 21, second level plastic jacket 22 and isolating door 3；
The bottom of the feed space 11 is connected with level-one cellar 12, and the second level cellar 13 passes through with the discharge room 14
Second intercommunicating pore 16 is connected, and the level-one cellar 12 and second level cellar 13 are mutually conducted by the first intercommunicating pore 15, and described one
Grade plastic jacket 21 closes the top at the level-one cellar 12, and the second level plastic jacket 22 closes the top at the second level cellar 13；It is described
The top of feed space 11 is in communication with the outside, and the top of the discharge room 14 is in communication with the outside；
The isolating door 3 is movably articulated in the side of the intercommunicating pore 15, and the positive and negative two sides difference of the isolating door 3
Equipped with the enabling rope 31 for leading to outside and Guan Meng rope 32；It, can be by the isolation by pulling the positive enabling of isolating door 3 rope 31
Door 3 is opened, and by pulling the pass dream rope 32 of 3 reverse side of isolating door, can be closed the isolating door 3.
It further include guide rail component, movable plate 5 and pulling plate rope 6；The guide rail component is set in the second level cellar 13, and edge
The level-one cellar 12 is arranged to the direction of the discharge room 14；The movable plate 5 is slideably secured to the guide rail component, institute
Pulling plate rope 6 is stated across second level cellar 13, one end of the pulling plate rope 6 is set to second level cellar 13 close to the one of level-one cellar 12
Side, the other end of the pulling plate rope 6 are set to second level cellar 13 close to the other side of discharge room 14, by pulling the pulling plate rope
6, it can control the movable plate 5 to slide along the guide rail component.
The guide rail component includes main guide rail 41 and two bottom guide tracks 42, and the main guide rail 41 is set to the second level cellar
13 middle part, two sides of the bottom at the cellar of second level described in two bottom guide tracks 42 13；The middle part of the movable plate 5 is equipped with slide bar
Hole 53, the sliding rod hole 53 are set in the main guide rail 41.
The structure of the movable plate 5 is shown in Figure 7, and the middle part of movable plate 5 is equipped with two sides of the bottom of the movable plate 5
The movable span of the bottom guide track 42 is slidably matched with equipped with two；The edge of the movable span is equipped with for connecting and fixing
Springlock 52.
Further include out cover rope 26 and several sleeving connecting rods 23；The side of the level-one plastic jacket 21 and the second level plastic jacket 22
Set being equipped with along suture to stitch, the side wall at the level-one cellar 12 and second level cellar 13 is arranged at intervals with several grooves 28 along the vertical direction,
Spring member 24 is equipped in the groove 28；The set seam is set in the groove 28 by the sleeving connecting rod；It is described to open cover rope 26
One end be fixed in the bottom end of the sleeving connecting rod 23, the other end passes through the bottom of the groove 28, and by leading block 25 around
The end that can be pullled is formed to outside.The cover rope 26 of opening is equipped with tension pulley block 27.
The level-one plastic jacket 21 and second level plastic jacket 22 are red soil soft plastic material.
The bottom at the level-one cellar 12 is to store the inclined arcwall face 121 in 13 directions to the second level along the feed space 11.
The bottom at the level-one cellar 12 is equipped with the sediment ejection opening 122 being in communication with the outside.The sediment ejection opening 122 is for excluding in raw material
Sandstone and metal substance sediment.
It further include short sliding door rope 61,62 referring to attached drawing 2 to 3；The movable plate 5 is equipped with side and opens plate 51, which opens plate 51
Front the pulling plate rope 6 is fixed on by short sliding door mind 61, which, which opens the reverse side of class 51 and restricted by short sliding door, 62 is fixed on institute
Pulling plate rope 6 is stated, and forms three rope tie points, short pulling plate when side pulls thereto with the pulling plate rope 6, positioned at the other side
I.e. will drive the side opens 51 open or close of plate to rope 61 or 62.
The movable plate 5 is two, and two movable plates 5 are equipped with the side and open plate 51；By the way that two work are arranged
The side of movable plate 5 opens the length of the short sliding door rope 61,62 on plate 51 and fixes position, and the side of two movable plates 5 is made to open plate 51
It can successively open or close.The rotation axis that plate 51 is opened in the side is set to the movable plate close to the side of the discharge room 14,
So that plate 51 is opened only in the side can store 12 to the direction of discharge room 14 opening along level-one.The difference of size, the work are stored according to biogas
Movable plate 5 can also be multiple.
The course of work of the invention will be illustrated in conjunction with shown in fig. 4 to fig. 6:
The main body at the biogas cellar is four to differ in size the cavity of reinforced concrete production.Raw material passes through feed space 11
Bottom enters in level-one cellar 12, and adjusts the pH value in the level-one cellar 12 by control feed space 11；Carrying raw material is in level-one
In cellar 12 after fermenting-ripening, the rope 31 that opens the door is pulled to open the isolating door 3, since the bottom surface at level-one cellar 12 is arcwall face 121, institute
With, the raw material in level-one cellar 12 can enter second level cellar 13 under the effect of gravity, in addition, when pulling shutdown rope 32,
Isolating door 3, which squeezes raw material, enters second level cellar 13.
Two movable plates 5 are equipped in second level cellar 13, which is divided into several regions for second level cellar 13, passes through
Pulling plate rope 6 pulls movable plate 5 to slidably reciprocate, and is stirred to the raw material in second level cellar 13.While pulling pulling plate rope 6,
Since pulling plate rope 6 is equipped with the short sliding door rope 61,62 that is connected with the front and back sides that plate 51 is opened in side, by pulling plate rope 6 to discharge room 14 1
When layback moves, which can successively be opened, by raw material to 14 direction of discharge room push, when by pulling plate rope 6 to level-one store
When 12 directions pull, which, which can successively close, resets, and by pulling pulling plate rope 6 repeatedly, can make in second level cellar 13
Raw material is sent into the discharge room 14.
Above-described embodiment is only used to further illustrate a kind of plastic jacket natural pond of two-part continuous flow anaerobic fermentation of the invention
Gas cellar, but the invention is not limited to embodiments, it is to the above embodiments any according to the technical essence of the invention
Simple modification, equivalent change and modification is fallen within the scope of protection of technical solution of the present invention.
Claims (6)
1. a kind of plastic jacket biogas of two-part continuous flow anaerobic fermentation is stored, it is characterised in that: including feed space, level-one cellar, two
Grade cellar, discharge room, level-one plastic jacket, second level plastic jacket and isolating door；
The bottom of the feed space is connected with level-one cellar, and the second level cellar is connected with the discharge room, the level-one
Cellar and second level cellar are mutually conducted by an intercommunicating pore, and the level-one plastic jacket closes the top at the level-one cellar, and described two
Grade plastic jacket closes the top at the second level cellar；It is in communication with the outside at the top of the feed space, the top of the discharge room and outer
Boundary's connection；
The isolating door is movably articulated in the side of the intercommunicating pore, and the positive and negative two sides of the isolating door are respectively equipped with extraction
Enabling rope to outside and rope of closing the door；By pulling the positive enabling rope of the isolating door, which can be opened, pass through pulling
The shutdown rope of the isolating door reverse side can close the isolating door；
It further include guide rail component, movable plate and pulling plate rope；The guide rail component is set in the second level cellar, and along the level-one
It stores and is arranged to the direction of the discharge room；The movable plate is slideably secured to the guide rail component, and the pulling plate rope passes through
The second level cellar, one end of the pulling plate rope are set to the second level and store the side close to level-one cellar, the other end of the pulling plate rope
It stores set on the second level close to the other side of discharge room, by pulling the pulling plate rope, the movable plate can control to lead described in
Rail member slide；
The guide rail component includes main guide rail and two bottom guide tracks, and the main guide rail is set to the middle part at the second level cellar, institute
State two sides of the bottom at the cellar of second level described in two bottom guide tracks；The middle part of the movable plate is equipped with sliding rod hole, the sliding rod hole set
Loaded on the main guide rail；
Two sides of the bottom of the movable plate are equipped with two movable spans for being slidably matched with the bottom guide track；The movable span
Edge be equipped with springlock for connecting and fixing；
It further include short sliding door rope；The movable plate is equipped with side and opens plate, and the obverse and reverse which opens plate passes through two sections short respectively
Sliding door rope is fixed on the pulling plate rope, and completes folding by pulling the pulling plate rope that the side can be made to open plate.
2. a kind of plastic jacket biogas of two-part continuous flow anaerobic fermentation according to claim 1 is stored, it is characterised in that: also
Including opening cover rope and several sleeving connecting rods；The suture of the edge of the level-one plastic jacket and the second level plastic jacket is equipped with set seam, institute
The side wall for stating level-one cellar and second level cellar is arranged at intervals with several grooves along the vertical direction, and spring member is equipped in the groove；Institute
It states set seam and the groove is set in by the sleeving connecting rod；Described one end for opening cover rope is fixed in the bottom end of the sleeving connecting rod, separately
One end passes through the bottom of the groove, and the end that can be pullled is formed around to outside.
3. a kind of plastic jacket biogas of two-part continuous flow anaerobic fermentation according to claim 1 is stored, it is characterised in that: institute
It states level-one plastic jacket and second level plastic jacket is red soil soft plastic material.
4. a kind of plastic jacket biogas of two-part continuous flow anaerobic fermentation according to claim 1 is stored, it is characterised in that: institute
The bottom for stating level-one cellar is to store the inclined arcwall face in direction to the second level along the feed space.
5. a kind of plastic jacket biogas of two-part continuous flow anaerobic fermentation according to claim 1 is stored, it is characterised in that: institute
The bottom for stating level-one cellar is equipped with the sediment ejection opening being in communication with the outside.
6. a kind of plastic jacket biogas of two-part continuous flow anaerobic fermentation according to claim 1 is stored, it is characterised in that: institute
Stating movable plate is two, and two movable plates are equipped with the side and open plate；It opens on plate side by the way that two movable plates are arranged
Short sliding door rope length and fixed position, so that the side of two movable plates is opened plate can successively open or close.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610857549.1A CN106399065B (en) | 2016-09-28 | 2016-09-28 | A kind of plastic jacket biogas cellar of two-part continuous flow anaerobic fermentation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610857549.1A CN106399065B (en) | 2016-09-28 | 2016-09-28 | A kind of plastic jacket biogas cellar of two-part continuous flow anaerobic fermentation |
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| CN106399065B true CN106399065B (en) | 2019-05-03 |
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| CN101705180B (en) * | 2009-11-13 | 2011-12-14 | 常熟市唐洲生态种养基地 | Floating cover type methane generation device |
| CN104403933B (en) * | 2014-11-17 | 2017-01-04 | 华侨大学 | Water-pressure sealed biogas is stored |
| CN105219621B (en) * | 2015-02-12 | 2017-08-22 | 华侨大学 | The biogas cellar for storing things of two kinds of acid-base value anaerobic fermentations can be made |
| CN205473749U (en) * | 2016-02-24 | 2016-08-17 | 戴宝成 | Straw fermentation methane -generating pit |
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