CN101705180B

CN101705180B - Floating cover type methane generation device

Info

Publication number: CN101705180B
Application number: CN2009102351637A
Authority: CN
Inventors: 钱小明; 邹金元; 唐健
Original assignee: CHANGSHU TANGZHOU ECOLOGICAL PLANNING BASE
Current assignee: CHANGSHU TANGZHOU ECOLOGICAL PLANNING BASE
Priority date: 2009-11-13
Filing date: 2009-11-13
Publication date: 2011-12-14
Anticipated expiration: 2029-11-13
Also published as: CN101705180A

Abstract

The invention relates to a floating cover type methane generation device belonging to the technical field of comprehensive energy utilization and environmental-friendly facilities. The floating cover type methane generation device comprises a fermentation pool, a fermentation material acidization pool, a dreg liquid eduction sedimentation pool, a floating cover and at least one methane eduction pipe, wherein the fermentation material acidization pool and the dreg liquid eduction sedimentation pool are respectively communicated with the fermentation pool; the floating cover is arranged on the fermentation pool; and the methane eduction pipes extend into the fermentation pool. The floating cover type methane generation device is characterized in that the inner wall of the periphery of the fermentation pool is respectively provided with at least one floating cover guide mechanism, and each floating cover guide mechanism is contacted with the outer wall of the floating cover; the outer wall of the periphery of the fermentation pool is respectively provided with at least one limiting mechanism; a pool edge is provided with guide rails with the same number as that of the limiting mechanisms and the position corresponding to that of the limiting mechanisms; and the limiting mechanisms are matched with the guide rails. The inner wall of the fermentation pool is provided with the floating cover guide mechanisms, and the floating cover is provided with the limiting mechanisms, thus the floating cover can cover on the open position of the fermentation pool in a floating state; in addition, when the pressure of methane is increased, the floating cover floats upwards, and vice versa, thus explosion and the like can not occur due to pressure increase, and the safety is ensured.

Description

Floating cover type methane generation device

Technical field

The invention belongs to comprehensive utilization of energy and technical field of environmental protection facilities, be specifically related to a kind of floating cover type methane generation device, utilize the manure fermentation that is produced in the livestock and poultry cultivation process to become biogas, make the energy obtain comprehensive utilization and protection environment.

Background technology

For the livestock and poultry cultivation person, how disposing the ight soil that livestock and poultry produce is the thing that part extremely bothers all the time, because, although vast livestock and poultry cultivation person horn of plenty people's vegetable basket is serving as a people " smelly ", a people " dirty " to exchange the role of ten thousand people " perfume (or spice) " for, and be subjected to the respect and the respect of urban and rural residents, but the emphasis that the disposal of the ight soil that produces in the livestock and poultry cultivation process is an environmental administration always to be paid close attention to, if mishandling then can cause to environment damage, so spread disease.

In recent years; report constantly that in news media the example that utilizes the ight soil that is produced in the livestock and poultry cultivation process to produce biogas is arranged; and each province, city, municipal departments of government have all given policy and support fund; improved the culturist science, rationally and environmental protection ground dispose the confidence of feces of livestock and poultry; the raiser utilizes the enthusiasm of pig manure, cow dung, poultry manure fermentation and biogas production surging, we can say between the comprehensive utilization of enriching the people's vegetable basket and the energy (recycling economy) and protection environment and has found best joint or claimed trim point.

As everyone knows, biogas generating device is carrier usually with the terrace, on terrace, excavate and water shop mathane generating pool (aerogenesis pond), be provided for cover that the mathane generating pool lid is closed at the uncovered position on the top of mathane generating pool, be incorporated into the biogas that the feces of livestock and poultry in the mathane generating pool produces and draw through fermenting after, or be used for generating electricity, or be used to do and cook a meal by pipeline, perhaps generate electricity and do cook a meal hold concurrently and it, or the like.But, the biogas generating device of this structure has potential safety hazard, because being arranged on the cover on mathane generating pool top is fixed, can not float, therefore when the natural pond in the mathane generating pool was large-minded, the corresponding increase of interior pressure was gently then lifted cover and is removed, then can bleed explode when serious, cause damage to people's lives and properties.In fact, because of increasing and can not get in time discharging caused accident, the biogas pressure in the mathane generating pool often takes place, especially the raiser who experienced aforementioned circumstances personally for the raiser who uses the feces of livestock and poultry fermentation to produce the biogas generating device of biogas has caused bigger psychological pressure, is embodied in what is said or talked about gas and sighs.In addition, the biogas generating device of aforementioned structure also has the fastidious property to weather, and in the summer of broiling sun, tolerance is comparatively abundant, yet in the winter of cold, because envrionment temperature is lower, the aerogenesis effect is very poor, can't satisfy the regular supply of biogas.In view of this, be necessary the biogas generating device in the prior art is improved, the applicant has passed through practice and exploration for many years, has found result of the above problems, and technical scheme described below produces under this background.

Summary of the invention

Top priority of the present invention is to provide a kind of cover that is arranged on the mathane generating pool that can make to adapt to the biogas pressure in the mathane generating pool and use the floating cover type methane generation device that embodies safety and avoid having an accident.

An also task of the present invention is to provide a kind of and can guarantees to have good ferment effect and use the floating cover type methane generation device of the supply that ensures biogas in winter.

For top priority of the present invention is finished in embodiment, technical scheme provided by the invention is: a kind of floating cover type methane generation device, comprise be formed on the terrace and the pond along being projected on the fermentation vat of terrace surface, be positioned at fermentation vat one end and the fermentation materials acidification pool that is used for carrying fermentation materials that communicate with fermentation vat to fermentation vat, be positioned at fermentation vat the other end and being used for of communicating equally with fermentation vat the slag liquid of fermentation vat is drawn settling tank, the uncovered position lid with the top of fermentation vat of being used for that is located on the fermentation vat closes and constitutes the floating cover in biogas chamber and at least one and is stretched over the biogas fairlead that the biogas in biogas chamber is drawn of being used for that fermentation vat and upper end probe into described biogas chamber, be characterised in that: respectively be provided with at least one group of floating cover guide mechanism on the inwall around the described fermentation vat, each floating cover guide mechanism pastes mutually with the outer wall of described floating cover and touches, respectively be provided with at least one position-limit mechanism on the outer wall around the described floating cover, described pond along on be provided with equate with the quantity of described position-limit mechanism and the corresponding guide rail in position, described position-limit mechanism matches with guide rail.

Finish an also task of the present invention for embodiment, technical scheme provided by the invention is: the pond of described fermentation vat along on be provided with a booth with vacant state, this booth corresponding to the outside of described floating cover and and the outer wall of floating cover between constitute lighting space.

In a specific embodiment of the present invention, described floating cover guide mechanism comprises one group of first roller mount and one group of first roller, one group of first roller mount fixed with state ground, interval and inwall in the short transverse of described inwall, and each first roller mount head lamp brush guard pivot is provided with the outer wall subsides of one first roller, each first roller and described floating cover and touches.

In another specific embodiment of the present invention, described position-limit mechanism comprises second roller mount and second roller, and second roller mount is fixed on the outer wall of described floating cover, and the second roller pivot is arranged on second roller mount and with described guide rail and matches.

In another specific embodiment of the present invention, described fermentation materials acidification pool has an acidification pool diapire, described fermentation vat has a fermentation vat diapire, and described settling tank has a settling tank diapire, described acidification pool diapire is higher than the fermentation vat diapire, and the fermentation vat diapire tilts towards the direction of settling tank, and the settling tank diapire tilts towards the direction away from the fermentation vat diapire.

In another specific embodiment of the present invention, described booth comprises carrier base, arch bar and film, carrier base has two groups that correspond to each other, wherein one group is disposed on the pond of a side of length direction of described fermentation vat along last, another group then is located at the pond of opposite side of length direction of fermentation vat along last, one end of arch bar be plugged on be positioned at a side the pond along on the last carrier base, the other end of arch bar be plugged on be positioned at opposite side the pond along on the last carrier base, film applies solid on arch bar and corresponding to the top of described floating cover, and described lighting space is formed between film and the floating outer wall that covers.

Also have in the specific embodiment of the present invention, constitute the strengthening rib that is used to strengthen floating intensity of covering on the inwall of described floating cover at interval.

More of the present invention and in specific embodiment, one end of described fermentation materials acidification pool connects a material inlet tube that is used for fermentation materials is incorporated into the fermentation materials acidification pool, and the below of the other end of fermentation materials acidification pool offers a flow-guiding mouth that is used for the material after acidification of fermentation materials acidification pool is incorporated into described fermenting tank for fermentation, this flow-guiding mouth communicates with fermentation vat, be equipped with at least one mixer structure at the top of fermentation materials acidification pool, the top of described settling tank is equipped with one and is used to make the material in the fermentation vat to implement round-robin material cycling mechanism, and also be provided with one is used for the slag pumper structure and that the slag charge of settling tank is extracted out is used for sewage drawing mechanism that the sewage of settling tank is extracted out at the top of settling tank, offer an overflow port on the described fermentation vat, overflow port communicates with settling tank.

In of the present invention and then specific embodiment, described mixer structure comprises first motor, step-down gear and stirring rake, first motor and step-down gear connect and are taken on the top cover that first motor is fixed on the fermentation materials acidification pool by step-down gear, stirring rake and step-down gear are in transmission connection, and are stretched in the cell cavity of fermentation materials acidification pool.

In again of the present invention and then specific embodiment, described material cycling mechanism comprises second motor, recycle pump, liquid-inlet pipe and drain pipe, second motor matches with recycle pump and is taken on the top cover that recycle pump is installed in settling tank by second motor, one end of liquid-inlet pipe and the fluid inlet of recycle pump connect, the other end is insinuated into the bottom of an end of the length direction of fermentation vat, one end of drain pipe and the liquid outlet of recycle pump connect, and the other end is stretched over the bottom of the other end of the length direction of fermentation vat; Described slag pumper structure comprises the 3rd motor, takes out pulp pump, slag feed pipe and scum pipe, take out that pulp pump matches with the 3rd motor and take and take out on the top cover that pulp pump is installed in settling tank by the 3rd motor, one end of slag feed pipe connects with the slag inlet of taking out pulp pump, the other end is stretched over the bottom of settling tank, one end of scum pipe and the slag notch of deslagging pump connect, and the other end draws and is connected to the subsequent disposal place; Described sewage drawing mechanism comprises the 4th motor, residual sea water pump, plumbing for waste water and blow-off pipe, residual sea water pump and the 4th motor connect and are taken on the top cover that residual sea water pump is installed in settling tank by the 4th motor, one end of plumbing for waste water and the fluid inlet of residual sea water pump connect, the other end is insinuated in the settling tank, and be positioned at the top of settling tank, one end of blow-off pipe and the liquid outlet of residual sea water pump connect, and the other end draws and is connected to the sewage disposal place.

Technical scheme provided by the invention, owing to be provided with floating cover guide mechanism on the inwall of fermentation vat and on floating cover, be provided with position-limit mechanism, therefore can make floating cover place the uncovered position of fermentation vat with quick condition ground cover, when biogas pressure increases, floating cover come-up, vice versa, thereby can not ensure safety because of pressure increases to cause to use such as explosion phenomenon.

Description of drawings

Fig. 1 is a specific embodiment structure iron of the present invention.

Fig. 2 is the sectional view of Fig. 1.

Embodiment

For the auditor that the makes Patent Office especially public can be expressly understood technical spirit of the present invention and beneficial effect more, the applicant general elaborates in conjunction with the accompanying drawings in the mode of embodiment below, but to the description of embodiment all is not restriction to the present invention program, any according to the present invention's design done only for pro forma but not substantial equivalent transformation all should be considered as technical scheme category of the present invention.

Please be referring to Fig. 1 and Fig. 2, the length and the width of the fermentation vat 1 that provides are not subjected to concrete restriction, for example longly are ten meters or tens meters, and be short then can be as short as several meters, width is with example, wide can be wide to several meters or tens meters, narrow can be narrow extremely several meters.On the inwall 12 of the correspondence of the length direction of fermentation vat 1, respectively be provided with floating cover guide mechanism 6 with state ground, interval, and on the inwall 12 of the correspondence of the width of fermentation vat 1, be provided with floating cover guide mechanism 6 equally, if the length of fermentation vat 1 is long, the quantity of the floating cover guide mechanism 6 that is provided with at interval on the inwall of length direction is many so, with example, if the width of fermentation vat 1 is wide, can increase the quantity of floating cover guide mechanism 6 so equally.In view of this, the applicant does not need the quantity of floating cover guide mechanism 6 is done concrete the qualification.With regard to a floating cover guide mechanism 6, by one group of first roller mount 61 and one group of first roller 621 that quantity equates with the quantity of first roller mount 61, one group of first roller mount 61 from the short transverse of fermentation vat 1 from top to bottom or claim fixed interval from bottom to top, promptly fixing with state ground, interval and inwall 12, according to known general knowledge pivot one first roller 62 is set on each first roller mount 61, each first roller 62 all contacts (subsides are touched) with the outer wall of floating cover 4.Preferred scheme also can be concaved with at the outer wall of floating cover 4 and the suitable recessed edge of first roller 62, so that cover 4 and well contact with floating for first roller 62.As seen, floating cover 4 is to be located at being covered by its uncovered position to the top of fermentation vat 1 on the fermentation vat 1 with suspension form ground closing.The pond of fermentation vat 1 is along 11 slightly above the surface (ground surface) of terrace, is arranged at intervals with guide rail 111 in the pond on along 11.Whole fermentation vat 1 is communicated with fermentation materials acidification pool 2 by the flow-guiding mouth 23 that is opened on the fermentation materials acidification pool 2, and is communicated with settling tank 3 by the overflow port on the wall body that is opened in fermentation vat 1 14 between fermentation materials acidification pool 2 and settling tank 3.See that by Fig. 2 the acidification pool diapire 21 of fermentation materials acidification pool 2 is slightly higher than fermentation vat diapire 13, and fermentation vat diapire 13 tilts towards the direction of settling tank 3, and the settling tank diapire 31 of settling tank 3 tilts towards the direction away from fermentation vat 1 also.The notion of material above-mentioned mainly refers to pig manure, cow dung or poultry ight soil, but is not limited to the scope of being lifted, and for example human excrement etc. also can be used as fermentation materials.

The aforesaid floating cover 4 preferred glass reinforced plastic that use are filled the post of, in order to strengthen the intensity of floating cover 4, inwall at floating cover 4 constitutes strengthening rib 42 at interval, the inwall at the top of floating cover 4 and the space between the fermentation vat 1 constitute biogas chamber 41, assemble in biogas chamber 41 by the biogas namely for methane gas after fermentation vat 1 fermentation, draw by biogas fairlead 5, perhaps be used for generating, perhaps be used for daily life and do and cook a meal.By illustrated in figures 1 and 2, one end of a biogas fairlead 5 is stretched in the fermentation vat 1, and be stuck in the liquid level in the fermentation vat 1, promptly be insinuated into aforesaid biogas chamber 41, also join intrinsic biogas filter cap 51 on the top of this biogas fairlead 5, the other end of biogas fairlead 5 promptly is stretched over fermentation vat 1 that outer end and is connected with marsh gas power generation mechanism, perhaps is connected with gas holder.

Continue to see Fig. 1 and Fig. 2, on the outer wall of the length direction of aforesaid floating cover 4 and width, respectively be provided with position-limit mechanism 7, the quantity of position-limit mechanism 7 adapts with the length and the width of floating cover 4, for example when aforesaid fermentation vat 1 during tediously long and broad, therefore the length and the also corresponding increase of width of so floating cover 4 are arranged at the floating also corresponding increase of quantity of covering the position-limit mechanism 7 on 4.Each position-limit mechanism 7 comprises that second roller mount 71 on the outer wall that is fixed on floating cover 4 and second roller, 72, the second rollers 72 that are configured on (pivot setting) second roller mount 71 match along the guide rail on 11 111 with the aforesaid pond that is fixed on.Because the shape of cross section of guide rail 111 takes the shape of the letter U, therefore second roller 72 is contained in the chamber of this U-shaped just.

In order to ensure the ferment effect of fermentation vat 1, to avoid fastidious to envrionment temperature, therefore the pond of fermentation vat 1 along 11 on suspended state be installed with a booth 8, booth 8 is by carrier base 81, arch bar 82 and film 83 constitute, present embodiment has provided two pack support seats 81, wherein a pack support seat 81 is fixed on the pond of a side of length direction of fermentation vat 1 along on 11 with the interval state, and another pack support seat 81 is fixed on the pond of opposite side of length direction of fermentation vat 1 along on 11 with the interval state equally, and keep corresponding one by one each other, the two ends of arch bar 82 are plugged on the pair of brackets seat 81 that corresponds to each other, film 83 is laid on the arch bar 82, and remain with the distance that is about 30-60cm between the roof of film 83 and floating cover 4, constitute lighting space 9 by this distance.Aforesaid film 83 is PVC film (also claiming plastics film).In the winter of cold, therefore low and light application time weak point can be relieved by booth 8 because of envrionment temperature, makes the temperature in the fermentation vat 1 remain on the ideal degree, and the gas production rate of biogas is ensured.

Please see Fig. 2 by emphasis, is furnished with fermentation materials acidification pool 2 at the left end of fermentation vat 1, one end of this fermentation materials acidification pool 2 is furnished with a material inlet tube 22, flow-guiding mouth 23 is offered in the bottom of the other end, is introduced in the fermentation vat 1 by the material of this flow-guiding mouth 23 after with the acidified processing in the fermentation materials acidification pool 2.On the top cover 25 of fermentation materials acidification pool 3, be equipped with a pair of mixer structure 24, each mixer structure 24 is made of first motor 241, step-down gear 242 and stirring rake 243, step-down gear 242 is taken first motor 241 that connects with it and is bearing on the top cover 25, stirring rake 243 is connected with step-down gear 242, and be stretched in cantilever state in the cell cavity of fermentation materials acidification pool 2, be used for the material of cell cavity is stirred, stirred materials imports fermentation vat 1 through flow-guiding mouth 23.The right-hand member of fermentation vat 1 is a settling tank 3, the cover plate 35 of this settling tank 3 is provided with material cycling mechanism 32, slag pumper structure 33 and sewage drawing mechanism 34, preferred but not the structure material cycling mechanism 32 that is limited to is as follows: a recycle pump 322 and second motor 321 are matched and take recycle pump 322 by second motor 321 and be bearing on the cover plate 35, one end of one liquid-inlet pipe 324 and the fluid inlet of recycle pump 322 connect, the other end probes into the nearly bottom of fermentation vat 1 behind the bottom that is stretched over settling tank 3, one end of one drain pipe 324 and the fluid inlet of recycle pump 322 connect, the other end and makes the position of the liquid outlet 3231 of drain pipe 323 corresponding to aforesaid flow-guiding mouth 23 in being stretched over fermentation vat 1.As seen, the effect of material cycling mechanism 32 is that the material in the fermentation vat 1 is moved, to improve fermentation efficiency.The preferred construction of slag pumper structure 33 is as follows: one takes out pulp pump 332 and the 3rd motor 331 connects and taken by the 3rd motor 331 and to take out pulp pump 332 and be bearing on the cover plate 35, one end of one slag feed pipe 333 connects with the slag inlet of taking out pulp pump 332, the other end is stretched in the slag blanket 36 of bottom of cell cavity of settling tank 3, one end of one piece of scum pipe 334 connects with the slag-drip opening of taking out pulp pump 332, the other end draws and is connected to the subsequent disposal place, and the subsequent disposal place of being said here comprises the place of banking up the place or being used to make organic granulated fertilizer.If the present invention is matched in the occasion that existing breed livestock has plantation vegetables and fruits nursery stock again, so, the slag charge of being discharged by scum pipe 334 is used for the fertilising of vegetables and fruits nursery stock, otherwise then is used to make organic fertilizer, to embody recycling economy and protection environment.The preferred construction of sewage drawing mechanism 34 is as follows: a residual sea water pump 342 and the 4th motor 341 connect and take residual sea water pump 342 by the 4th motor 341 and be supported on the cover plate 35, one end of one plumbing for waste water 343 and the dirt inlet of residual sea water pump 342 connect, the other end is stretched over the sewage layer 37 that is arranged in described slag blanket 36 tops in the settling tank 3, one end of blow-off pipe 344 and the sewage draining exit of residual sea water pump 342 connect, the other end draws and is connected to the sewage disposal place, here included following two kinds of situations that are not limited in the sewage-farm of being said: the one, when the present invention is matched in the occasion that aforesaid existing breed livestock has plantation vegetables and fruits nursery stock and even rice wheat again, so, sewage is drawn and connected dropper by blow-off pipe 344, implement drip irrigation by dropper, to embody the ecological agriculture; The 2nd, introduce water collecting basin by blow-off pipe 344, so that carry out sewage disposal, so that embody the protection environment.

The applicant sketches application of the present invention, the animal manure in livestock-raising place causes material inlet tube 22 by the road, enter fermentation materials acidification pool 2 and carry out acidification, and enable stirring mechanism 24, material after the acidification imports fermentation vat 1 from flow-guiding mouth 23, use is drawn by biogas fairlead 5 in the material bed biogas chamber 41 that enters floating cover 4 in the biogas that is produced by fermentation in the fermentation vat 1 (methane gas) the effusion fermentation vat 1.When producing a large amount of biogas in the fermentation vat 1, when being the biogas generation pressure in the biogas chamber 41, floating cover 4 is at the effect float downward of floating cover guide mechanism 6 and position-limit mechanism 7, and vice versa, therefore can not cause mishap because of the biogas pressure in the biogas chamber 41 of floating cover 4 increases.Material in the fermentation vat 1 is implemented regular or irregular move (flowing) by material cycling mechanism 32.Simultaneously, when the sewage in the settling tank 3 is full of, extract, and the accumulated slag in settling tank 3 for a long time, then extracted by slag pumper structure 33 by sewage drawing mechanism 34.If also can enable booth 8 winter, to improve the temperature in the fermentation vat 1, promote ferment effect, improve the biogas quantum of output.

In sum, technical scheme provided by the invention has overcome the shortcoming in the prior art that the applicant mentions in the background technology hurdle, reached goal of the invention and embodied the invention effect, so the present invention program is undoubtedly ultimate attainment.

Claims

1. floating cover type methane generation device, comprise be formed on the terrace and the pond be projected on the fermentation vat (1) of terrace surface along (11), be positioned at fermentation vat (1) one end and the fermentation materials acidification pool (2) that is used for carrying fermentation materials that communicate with fermentation vat to fermentation vat (1), be positioned at the other end and the settling tank (3) that being used for of communicating with fermentation vat (1) equally drawn the slag liquid of fermentation vat (1) of fermentation vat (1), the uncovered position lid with the top of fermentation vat (1) of being used for that is located on the fermentation vat (1) closes and constitutes the floating cover (4) in biogas chamber (41) and at least one and is stretched over the biogas fairlead (5) that the biogas of biogas chamber (41) is drawn of being used for that fermentation vat (1) and upper end probe into described biogas chamber (41), it is characterized in that: respectively be provided with at least one group of floating cover guide mechanism (6) on the inwall (12) around the described fermentation vat (1), each floating cover guide mechanism (6) pastes mutually with the outer wall of described floating cover (4) and touches, respectively be provided with at least one position-limit mechanism (7) on the outer wall around the described floating cover (4), in described pond along be provided with on (11) equate with the quantity of described position-limit mechanism (7) and the corresponding guide rail in position (111), described position-limit mechanism (7) matches with guide rail (111), described floating cover guide mechanism (6) comprises one group of first roller mount (61) and one group of first roller (62), one group of first roller mount (61) is fixing with state ground, interval and inwall (12) in the short transverse of described inwall (12), each first roller mount (61) head lamp brush guard pivot is provided with one first roller (62), each first roller (62) touches with the outer wall subsides of described floating cover (4), described position-limit mechanism (7) comprises second roller mount (71) and second roller (72), second roller mount (71) is fixed on the outer wall of described floating cover (4), and second roller (72) pivot is arranged on second roller mount (71) and upward and with described guide rail (111) matches.

2. floating cover type methane generation device according to claim 1, it is characterized in that in the pond of described fermentation vat (1) going up and be provided with a booth (8) with vacant state along (11), this booth (8) corresponding to the outside of described floating cover (4) and and the outer wall of floating cover (4) between constitute lighting space (9).

3. floating cover type methane generation device according to claim 1, it is characterized in that described fermentation materials acidification pool (2) has an acidification pool diapire (21), described fermentation vat (1) has a fermentation vat diapire (13), and described settling tank (3) has a settling tank diapire (31), described acidification pool diapire (21) is higher than fermentation vat diapire (13), and fermentation vat diapire (13) tilts towards the direction of settling tank (3), and settling tank diapire (31) tilts towards the direction away from fermentation vat diapire (13).

4. floating cover type methane generation device according to claim 2, it is characterized in that described booth (8) comprises carrier base (81), arch bar (82) and film (83), carrier base (81) has two groups that correspond to each other, wherein one group is disposed on the pond of a side of length direction of described fermentation vat (1) along on (11), another group then is located at the pond of opposite side of length direction of fermentation vat (1) on (11), one end of arch bar (82) is plugged on the pond that is positioned at a side along on the carrier base (81) on (11), the other end of arch bar (82) is plugged on the pond that is positioned at opposite side along on the carrier base (81) on (11), film (83) applies to be gone up and corresponding to the top of described floating cover (4) admittedly at arch bar (82), and described lighting space (9) is formed between film (83) and the floating outer wall that covers (4).

5. floating cover type methane generation device according to claim 1 and 2 is characterized in that constituting at interval on the inwall of described floating cover (4) strengthening rib (42) of the intensity that is used to strengthen floating cover (4).

6. according to claim 1 or 3 described floating cover type methane generation devices, an end that it is characterized in that described fermentation materials acidification pool (2) connects a material inlet tube (22) that is used for fermentation materials is incorporated into fermentation materials acidification pool (2), and the below of the other end of fermentation materials acidification pool (2) offers one and is used for the flow-guiding mouth (23) that the material after acidification with fermentation materials acidification pool (2) is incorporated into described fermentation vat (1) fermentation, this flow-guiding mouth (23) communicates with fermentation vat (1), be equipped with at least one mixer structure (24) at the top of fermentation materials acidification pool (2), the top of described settling tank (3) is equipped with one and is used to make the material in the fermentation vat (1) to implement round-robin material cycling mechanism (32), and also be provided with one is used for the slag pumper structure (33) and that the slag charge of settling tank (3) is extracted out is used for sewage drawing mechanism (34) with the sewage extraction of settling tank (3) at the top of settling tank (3), offer an overflow port (14) on the described fermentation vat (1), overflow port (14) communicates with settling tank (3).

7. floating cover type methane generation device according to claim 6, it is characterized in that described mixer structure (24) comprises first motor (241), step-down gear (242) and stirring rake (243), first motor (241) connects and takes first motor (241) by step-down gear (242) with step-down gear (242) and is fixed on the top cover of fermentation materials acidification pool (2), stirring rake (243) is in transmission connection with step-down gear (242), and is stretched in the cell cavity of fermentation materials acidification pool (2).

8. floating cover type methane generation device according to claim 7, it is characterized in that described material cycling mechanism (32) comprises second motor (321), recycle pump (322), liquid-inlet pipe (324) and drain pipe (323), second motor (321) matches with recycle pump (322) and takes recycle pump (322) by second motor (321) and is installed on the top cover of settling tank (3), the fluid inlet of one end of liquid-inlet pipe (324) and recycle pump (322) connects, the other end is insinuated into the bottom of an end of the length direction of fermentation vat (1), the liquid outlet of one end of drain pipe (323) and recycle pump (322) connects, and the other end is stretched over the bottom of the other end of the length direction of fermentation vat (1); Described slag pumper structure (33) comprises the 3rd motor (331), takes out pulp pump (322), slag feed pipe (333) and scum pipe (334), take out that pulp pump (332) matches with the 3rd motor (331) and take and take out pulp pump (332) and be installed on the top cover of settling tank (3) by the 3rd motor (331), one end of slag feed pipe (333) connects with the slag inlet of taking out pulp pump (332), the other end is stretched over the bottom of settling tank (3), the slag notch of one end of scum pipe (334) and deslagging pump (332) connects, and the other end draws and is connected to the subsequent disposal place; Described sewage drawing mechanism (34) comprises the 4th motor (341), residual sea water pump (342), plumbing for waste water (343) and blow-off pipe (344), residual sea water pump (342) connects and takes residual sea water pump (342) by the 4th motor (341) with the 4th motor (341) and is installed on the top cover of settling tank (3), the fluid inlet of one end of plumbing for waste water (343) and residual sea water pump (342) connects, the other end is insinuated in the settling tank (3), and be positioned at the top of settling tank (3), the liquid outlet of one end of blow-off pipe (344) and residual sea water pump (342) connects, and the other end draws and is connected to the sewage disposal place.