Straw and excrement mixed three-stage fermentation biogas device

Abstract

The utility model relates to the technical field of biogas fermentation, and particularly discloses a straw and excrement mixed three-stage fermentation biogas device which comprises a sealed container, spacing covers are hermetically and fixedly connected to the upper and lower ends in the sealed container; an inner-layer cover is hermetically and fixedly connected to the lower end in the sealed container; a proper amount of a mixture of straw and excrement is put through the feeding pipe and fermented at the interval between the sealed container and the interval cover, biogas generated by fermentation enters the gas storage pipe along the upper through groove to be displayed and stored, and part of the mixture enters the space between the interval cover and the inner-layer cover along the lower through groove to be subjected to secondary fermentation. Biogas generated by fermentation enters the gas storage pipe to be displayed and stored, then a mixture is continuously input for fermentation, the mixture exceeds the height of the inner-layer cover after being accumulated and enters the inner-layer cover for third-time fermentation, the fermented biogas enters the gas storage pipe to be displayed and stored, biogas slurry is accumulated in the inner-layer cover, and biogas residues can be discharged along the residue outlet pipe. The partitioned three-stage fermentation is realized, and the mixture is fully fermented and utilized.

Description

Technical Field

[0001] The utility model relates to the technical field of biogas fermentation, in particular to a straw and excrement mixed three-stage fermentation biogas device. Background Art

[0002] Biogas fermentation, also known as anaerobic digestion, refers to the process in which organic matter (such as human and livestock feces, straw, weeds, etc.) is decomposed and metabolized by various microorganisms under certain moisture, temperature and anaerobic conditions to eventually form a combustible mixed gas such as methane and carbon dioxide. The biogas fermentation system is based on the principle of biogas fermentation, with energy production as the goal, and ultimately realizes the comprehensive utilization of biogas, biogas slurry and biogas residue.

[0003] The Chinese utility model patent with publication number CN204589157U disclosed a four-in-one biogas fermentation device on August 26, 2015, which includes a primary dry fermentation mechanism, a secondary wet fermentation mechanism, a foldable air storage bag, a solar greenhouse and a solar water heater; the primary dry fermentation mechanism includes an annular dry fermentation tank filled with liquid and arranged in the solar greenhouse, a mesh box filled with material and immersed in the liquid, and a water seal cover sealed on the top of the mesh box; the secondary wet fermentation mechanism includes a wet fermentation tank connected to the dry fermentation tank, a heat exchanger arranged in the wet fermentation tank, and a biofilm fixed in the wet fermentation tank; an air duct is arranged on the top of the wet fermentation tank, the foldable air storage bag is arranged on the top of the wet fermentation tank and connected to the air duct, and the solar water heater is arranged on the top of the solar greenhouse and provides circulating hot water for the heat exchanger. The utility model solves the problem that the sludge pump is easy to be blocked, combines the use of solar energy and solar greenhouse, saves energy, shortens the degradation time of fiber materials, improves the utilization rate of fermentation raw materials, increases the content of methane in biogas, and increases the comprehensive utilization rate of biogas residues and biogas liquid.

[0004] However, the above-mentioned disclosed scheme has the following shortcomings: the existing multi-stage biogas device has a complex structure and a huge size, which makes it difficult to manufacture, assemble, move and install and fix, and it is impossible to adapt to the rural soil environment for installation and use, so the scope of application is not wide. Utility Model Content

[0005] The utility model aims to solve the technical problems that the existing multi-stage biogas devices have complex structures and huge volumes, making it difficult to conveniently manufacture, assemble, move and install and fix them, making it impossible to adapt to rural soil environments for installation and use, and making the scope of application limited, and provides a straw and feces mixed three-stage fermentation biogas device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The straw and feces mixed three-stage fermentation biogas device described in the utility model comprises a sealed container; the upper and lower ends of the sealed container are sealed and fixedly connected with a spacing cover; the lower end of the sealed container is sealed and fixedly connected with an inner cover; the upper end opening of the sealed container is fixedly connected with an air storage pipe; the lower half of the air storage pipe is provided with a plurality of filtering holes; the upper end opening of the air storage pipe is detachably fixedly connected with a first cover; the side of the air storage pipe is connected and fixedly connected with an air guide pipe; the upper surface of the sealed container is connected and fixedly connected with a plurality of feeding pipes corresponding to the interval between the sealed container and the spacing cover; the upper end of the feeding pipe is detachably fixedly connected with a second cover; the lower end of the sealed container is connected and fixedly connected with a slag discharge pipe; the slag discharge pipe is provided with a first valve; the lower end of the spacing cover is provided with a plurality of lower through grooves; the lower end of the sealed container is connected and fixedly connected with a plurality of sediment discharge pipes corresponding to the lower through grooves; the end of the sediment discharge pipe is fixedly connected with a second valve.

[0008] Furthermore, the sealed container, the spacer cover, the inner cover and the gas storage pipe are made of glass fiber reinforced plastics.

[0009] Furthermore, the opening of the feed pipe is located in the middle of the interval between the sealed container and the interval cover.

[0010] Furthermore, the upper end surface of the spacer cover is higher than the upper end surface of the inner cover.

[0011] The straw and feces mixed three-stage fermentation biogas device provided by the utility model has the following beneficial effects:

[0012] 1. The utility model puts a proper amount of straw and feces mixture into the gap between the sealed container and the partition cover through the feed pipe for fermentation, and the biogas generated by the fermentation enters the gas storage pipe along the upper through groove for display and storage, and part of the mixture enters the space between the partition cover and the inner cover along the lower through groove for secondary fermentation, and the biogas generated by the fermentation enters the gas storage pipe for display and storage, and then the mixture is continuously input for fermentation, and after the mixture accumulates and exceeds the height of the inner cover, it enters the inner cover for third fermentation, and after fermentation, the biogas enters the gas storage pipe for display and storage, the biogas liquid accumulates in the inner cover, and the biogas residue can be discharged along the residue discharge pipe, so as to realize the three-level fermentation of the partition, realize the full fermentation and utilization of the mixture, and solve the problem that the existing biogas fermentation device can only be divided into two-level fermentation and the volume is large and inconvenient to install and move;

[0013] 2. The utility model allows materials to enter the feed pipe and reach between the sealed container and the partition cover, thereby easily and evenly filling the space between the sealed container and the partition cover for fermentation, and can store a large amount of straw and feces raw materials for primary fermentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings;

[0015] Figure 1 This is a schematic diagram of the axonometric structure of the utility model;

[0016] Figure 2 It is a semi-section axonometric structural schematic diagram of the utility model;

[0017] Figure 3 It is a front half-section structural schematic diagram of the utility model.

[0018] Explanation of the numbers in the figure: 1. Sealed container; 2. Spacer cover; 3. Inner cover; 4. Air storage pipe; 5. Filter hole; 6. First cover; 7. Air guide pipe; 8. Feed pipe; 9. Second cover; 10. Slag discharge pipe; 11. Sediment discharge pipe; 12. Second valve; 13. First valve; 15. Lower through groove. DETAILED DESCRIPTION

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that all directional indications in the embodiments of the present invention (such as up-down-left-right-front-back...) are only used to explain the relative position relationship - movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0022] See also Figure 1-3As shown, the straw and feces mixed three-stage fermentation biogas device comprises a sealed container 1; the upper and lower ends of the sealed container 1 are sealed and fixedly connected with a spacing cover 2; the lower end of the sealed container 1 is sealed and fixedly connected with an inner cover 3; the upper end opening of the sealed container 1 is fixedly connected with a gas storage pipe 4; the lower half of the gas storage pipe 4 is provided with a plurality of filtering holes 5; the upper end opening of the gas storage pipe 4 is detachably fixedly connected with a first cover 6; the side of the gas storage pipe 4 is connected and fixedly connected with an air guide pipe 7; the upper surface of the sealed container 1 is connected and fixedly connected with a plurality of feeding pipes 8 corresponding to the interval between the sealed container 1 and the spacing cover 2; the upper end of the feeding pipe 8 is detachably fixedly connected with a second cover 9; the lower end of the sealed container 1 is connected and fixedly connected with a slag discharge pipe 10; the slag discharge pipe 10 is provided with a first valve 13; the lower end of the spacing cover 2 is provided with a plurality of lower through grooves 15; the lower end of the sealed container 1 is connected and fixedly connected with a plurality of sediment discharge pipes 11 corresponding to the lower through grooves 15; the discharge A second valve 12 is fixedly connected to the end of the sediment pipe 11; when working, an appropriate amount of straw and feces mixture is put into the gap between the sealed container 1 and the partition cover 2 through the feed pipe 8 for fermentation, and the biogas produced by the fermentation enters the gas storage pipe 4 for display and storage, and part of the mixture enters the space between the partition cover 2 and the inner cover 3 along the lower groove 15 for secondary fermentation. The sediment in the mixture can be discharged through the sediment discharge pipe 11, and the biogas produced by the fermentation enters the gas storage pipe 4 for display and storage, and then the mixture is continuously input for fermentation. After the mixture accumulates and exceeds the height of the inner cover 3, it enters the inner cover 3 for the third fermentation. After fermentation, the biogas enters the gas storage pipe 4 for display and storage, the biogas liquid accumulates in the inner cover 3, and the biogas residue can be discharged along the residue discharge pipe 10, realizing the three-level fermentation of the partition, realizing the full fermentation and utilization of the mixture, and solving the problem that the existing biogas fermentation device can only be divided into two-level fermentation and the volume is large and inconvenient to install and move.

[0023] The sealed container 1, the spacer cover 2, the inner cover 3 and the gas storage pipe 4 are made of fiberglass. When working, the sealed container 1, the spacer cover 2, the inner cover 3 and the gas storage pipe 4 made of fiberglass are light and have high structural strength, and can be in long-term and stable contact with the fermented mixture of straw and feces, thereby extending the service life.

[0024] The opening of the feed pipe 8 is located in the middle of the gap between the sealed container 1 and the partition cover 2; during operation, the material enters the feed pipe 8 and reaches between the sealed container 1 and the partition cover 2, thereby easily and evenly filling the space between the sealed container 1 and the partition cover 2 for fermentation, and a large amount of straw and feces raw materials can be stored for primary fermentation.

[0025] The upper end surface of the partition cover 2 is higher than the upper end surface of the inner cover 3; when working, the upper end surface of the partition cover 2 is higher than the upper end surface of the inner cover 3, so that the biogas generated after the primary fermentation of the straw and feces between the sealed container 1 and the partition cover 2 can rise to the gas storage pipe 4 to be stored, and then be discharged by the gas guide pipe 7 for use.

[0026] By adopting the above scheme, when the utility model is in use, an appropriate amount of straw and feces mixture is put into the gap between the sealed container 1 and the partition cover 2 through the feed pipe 8 for fermentation, and the biogas produced by the fermentation enters the gas storage pipe 4 for display and storage, and part of the mixture enters the space between the partition cover 2 and the inner cover 3 along the lower groove 15 for secondary fermentation. The silt in the mixture can be discharged through the silt discharge pipe 11, and the biogas produced by the fermentation enters the gas storage pipe 4 for display and storage, and then the mixture is continuously input for fermentation. After the mixture accumulates and exceeds the height of the inner cover 3, it enters the inner cover 3 for the third fermentation. After fermentation, the biogas enters the gas storage pipe 4 for display and storage, the biogas liquid accumulates in the inner cover 3, and the biogas residue can be discharged along the residue discharge pipe 10, realizing the zoned three-level fermentation, realizing the full fermentation and utilization of the mixture, and solving the problem that the existing biogas fermentation device can only be zoned for secondary fermentation and is large in size and inconvenient to install and move.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. Straw and feces mixed three-stage fermentation biogas device, It is characterized by: The invention comprises a sealed container (1); a spacer cover (2) is sealed and fixedly connected at the upper and lower ends of the sealed container (1); an inner cover (3) is sealed and fixedly connected at the lower end of the sealed container (1); an air storage pipe (4) is fixedly connected to the upper opening of the sealed container (1); a plurality of filter holes (5) are opened in the lower half of the air storage pipe (4); a first cover (6) is detachably fixedly connected to the upper opening of the air storage pipe (4); an air guide pipe (7) is connected and fixedly connected to the side of the air storage pipe (4); the upper surface of the sealed container (1) corresponds to the sealed container (1) and A plurality of feed pipes (8) are connected and fixedly connected at the interval of the spacer cover (2); a second cover (9) is detachably fixedly connected to the upper end of the feed pipe (8); a slag discharge pipe (10) is connected and fixedly connected to the lower end of the sealed container (1); a first valve (13) is provided on the slag discharge pipe (10); a plurality of lower through grooves (15) are formed at the lower end of the spacer cover (2); a plurality of sediment discharge pipes (11) are connected and fixedly connected to the lower through grooves (15) at the lower end of the sealed container (1); and a second valve (12) is fixedly connected to the end of each sediment discharge pipe (11).

2. The straw and feces mixed three-stage fermentation biogas device according to claim 1, Features: The sealed container (1), the spacer cover (2), the inner cover (3) and the gas storage pipe (4) are made of glass fiber reinforced plastics.

3. The straw and feces mixed three-stage fermentation biogas device according to claim 2, Features: The opening of the feed pipe (8) is located in the middle of the interval between the sealed container (1) and the interval cover (2).

4. The straw and feces mixed three-stage fermentation biogas device according to claim 3, Features: The upper end surface of the spacer cover (2) is higher than the upper end surface of the inner layer cover (3).

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