A biogas generator with built-in microbial enrichment mechanism

Abstract

The invention discloses a biogas generator with a built-in microorganism enrichment mechanism, and relates to the technical field of biogas production equipment. The biogas generator comprises a tank body, a sealing cover, a microorganism enrichment mechanism, and a stirring mechanism. The upper end of the tank body is open, the tank body is provided with a feed pipe and a discharge pipe, the sealing cover is connected to the upper end of the tank body, the sealing cover is provided with a biogas pipe, the feed pipe, the discharge pipe, and the biogas pipe are all connected to the inner cavity of the tank body, the microorganism enrichment mechanism and the stirring mechanism are both arranged in the inner cavity of the tank body, the microorganism enrichment mechanism is connected to the upper part of the tank body, and the stirring mechanism is connected to the sealing cover. The invention can improve the fermentation efficiency of biogas raw materials in the scum layer and improve the production efficiency of biogas.

Description

Technical Field

[0001] The invention relates to the technical field of biogas production equipment, in particular to a biogas generator with a built-in microorganism enrichment mechanism. Background Art

[0002] In the biogas generator, biogas raw materials (chopped straw, livestock and poultry manure, etc. can be used as biogas raw materials) and biogas fermentation microorganisms (biogas fermentation microorganisms refer to a group of microorganisms that degrade organic matter to produce biogas under anaerobic conditions) are located at the bottom of the biogas generator. As the fermentation time increases, the biogas raw materials at the bottom of the biogas generator will be stratified, that is, from bottom to top, there are sediment layer, active layer, clear liquid layer, and scum layer.

[0003] There are many biogas fermentation microorganisms in the active layer, but few biogas raw materials, and there is not enough biogas raw materials to produce biogas. There are relatively few biogas fermentation microorganisms and biogas raw materials in the clear liquid layer. There are many biogas raw materials in the scum layer, but few biogas fermentation microorganisms, which will make the biogas raw materials in the scum layer insufficiently fermented, thereby reducing the fermentation efficiency of the biogas raw materials in the scum layer and reducing the biogas production efficiency.

[0004] Therefore, how to improve the fermentation efficiency of biogas raw materials in the scum layer and improve the production efficiency of biogas is a technical problem that needs to be solved urgently by technicians in this field. Summary of the invention

[0005] The present invention aims at the above-mentioned deficiencies in the prior art and provides a biogas generator with a built-in microorganism enrichment mechanism. The present invention can improve the fermentation efficiency of biogas raw materials in the scum layer and improve the production efficiency of biogas.

[0006] To achieve the above purpose, the invention provides the following technical solutions:

[0007] A biogas generator with a built-in microorganism enrichment mechanism comprises a tank body, a sealing cover, a microorganism enrichment mechanism and a stirring mechanism. The upper end of the tank body is open, the tank body is provided with a feed pipe and a discharge pipe, the sealing cover is connected to the upper end of the tank body, the sealing cover is provided with a biogas pipe, the feed pipe, the discharge pipe and the biogas pipe are all connected to the inner cavity of the tank body, the microorganism enrichment mechanism and the stirring mechanism are both arranged in the inner cavity of the tank body, the microorganism enrichment mechanism is connected to the upper part of the tank body, and the stirring mechanism is connected to the sealing cover.

[0008] Furthermore, the microorganism enrichment mechanism includes a rotating rod, an inner ring, an outer ring, a microorganism enrichment plate, a vertical rod, a cross rod, an adjusting rod, a sleeve, a telescopic part, and a sealing gasket. There are multiple rotating rods, microorganism enrichment plates, and vertical rods. All the rotating rods are radially distributed with the inner ring as the center. One end of the rotating rod is rotatably connected to the inner ring, and the other end of the rotating rod is rotatably connected to the outer ring. The outer ring is connected to the tank body, a microorganism enrichment plate is connected to a rotating rod, and the lower end of an vertical rod is connected to a microorganism enrichment plate. The cross rod is arranged between two adjacent vertical rods, the cross rod is hinged to the upper end of the vertical rod, the lower end of the adjusting rod is connected to the upper end of an vertical rod, the adjusting rod cooperates with the adjusting long hole arranged on the sealing cover, the sleeve is slidably connected to the adjusting rod, the telescopic part is arranged on the upper end surface of the sealing cover, one end of the telescopic part is connected to the sealing cover, and the other end of the telescopic part is hinged to the sleeve. The upper end surface of the sealing cover is provided with a sealing gasket for covering the adjusting long hole, and two sealing gaskets are arranged side by side, and the gap between the adjusting rod and the two sealing gaskets cooperates.

[0009] Furthermore, the outer ring is provided with an outer rotation hole that cooperates with the rotation rod, the outer ring is provided with an outer limit groove on the side away from the inner ring, an outer limit ring connected to the rotation rod is provided in the outer limit groove, the outer diameter of the outer limit ring is larger than the aperture of the outer rotation hole, the inner ring is provided with an inner rotation hole that cooperates with the rotation rod, the inner ring is provided with an inner limit groove on the side away from the outer ring, the inner limit groove is provided with an inner limit ring connected to the rotation rod, and the outer diameter of the inner limit ring is larger than the aperture of the inner rotation hole.

[0010] Furthermore, the outer ring is provided with a mounting block on a side away from the inner ring, and the inner wall of the tank body is provided with a mounting long groove matched with the mounting block.

[0011] Furthermore, the stirring mechanism includes a driving assembly, a stirring shaft, and blades. The stirring shaft is arranged on the side of the inner ring away from the outer ring. The stirring shaft cooperates with the stirring hole arranged on the sealing cover. The stirring shaft is rotatably connected to the sealing cover through the driving assembly. The blades are arranged below the microorganism enrichment plate. There are multiple blades, and the blades are connected to the stirring shaft.

[0012] Furthermore, the driving assembly includes a motor, a driving gear, a driven gear, and a support ring. The motor is arranged on the upper end surface of the sealing cover, the motor is connected to the sealing cover, the driving gear is connected to the output shaft of the motor, the driven gear is connected to the stirring shaft, the driving gear cooperates with the driven gear, the support ring is arranged between the driven gear and the sealing cover, the support ring is connected to the stirring shaft, and the outer diameter of the support ring is larger than the aperture of the stirring hole.

[0013] Furthermore, the stirring mechanism also includes a retractable component, which includes a retractable telescopic part, a connecting plate, a connecting rod, and a connecting block. The retractable rod, the lower end of the retractable part is connected to the upper end of the stirring shaft, the upper end of the retractable part is connected to the connecting plate, the connecting plate is connected to the upper end of the connecting rod, the lower end of the connecting rod is connected to the connecting block, the connecting block is slidably connected to the stirring shaft, the connecting block slides up and down along the stirring shaft, the retractable rod is arranged above the blade, the upper end of the retractable rod is hinged to the connecting block, the lower end of the retractable rod is hinged to the blade, and the blade is hinged to the stirring shaft.

[0014] Furthermore, a handle is provided on the upper end surface of the driven gear.

[0015] Furthermore, the stirring shaft is provided with a connecting dovetail groove, the connecting rod is arranged in the connecting dovetail groove, the connecting block cooperates with the connecting dovetail groove, the upper end surface of the driven gear is provided with a sealing ring that cooperates with the connecting dovetail groove, and the sealing ring is provided with a connecting hole that cooperates with the connecting rod.

[0016] Furthermore, a first sealing cover and a second sealing cover are provided on the upper end surface of the sealing cover, the driving assembly, the retractable telescopic part, the connecting plate, the part of the connecting rod exposed from the sealing cover, the handle, and the sealing ring are all arranged in the first sealing cover, and the telescopic part, the sleeve, the sealing gasket, and the part of the adjusting rod exposed from the sealing cover are all arranged in the second sealing cover.

[0017] Compared with the prior art, the invention has the following beneficial effects:

[0018] 1. The present invention provides a stirring mechanism to fully mix the biogas raw materials with stratification, so that the biogas raw materials in the scum layer can fully contact with the biogas fermentation microorganisms in other layers (active layer, clear liquid layer), thereby improving the utilization efficiency and fermentation efficiency of the biogas raw materials in the scum layer and improving the biogas production efficiency.

[0019] At the same time, by setting up a stirring mechanism to stir the stratified biogas raw materials, the biogas in the clear liquid layer and the active layer below the scum layer can be allowed to flow upward, avoiding that the biogas in the clear liquid layer and the active layer below the scum layer is blocked by the scum layer and cannot flow upward, thereby improving the biogas collection efficiency.

[0020] In addition, since the survival and reproduction of biogas fermentation microorganisms should be static rather than dynamic, frequent stirring will interfere with the survival and reproduction of biogas fermentation microorganisms, so the number of stirring times needs to be reduced as much as possible. The present invention provides a microbial enrichment mechanism on the upper part of the tank body, so that when the biogas raw material is not stirred, as the biogas fermentation microorganisms continue to reproduce, the biogas fermentation microorganisms on the microbial enrichment mechanism can fall onto the scum layer, and the biogas fermentation microorganisms are added to the scum layer, so that the biogas raw material in the scum layer is fermented more fully, the utilization efficiency and fermentation efficiency of the biogas raw material in the scum layer are improved, and the biogas production efficiency is improved.

[0021] The present invention is particularly suitable for occasions where the biogas raw material is stirred less frequently or even not stirred at all, and the fermentation efficiency of the biogas raw material in the scum layer needs to be improved and the biogas production efficiency needs to be improved.

[0022] Furthermore, the present invention can improve the space utilization efficiency of the inner cavity of the tank body by arranging a microorganism enrichment mechanism on the upper part of the tank body, thereby increasing the processing capacity of biogas raw materials and the production capacity of biogas.

[0023] 2. The present invention allows the microbial enrichment plate to be located between the inner ring and the outer ring so that the microbial enrichment plate is located directly above the scum layer at the bottom of the tank body, thereby allowing the biogas fermentation microorganisms on the microbial enrichment plate to fall more evenly onto the scum layer at the bottom of the tank body, thereby further enabling the biogas raw materials in the scum layer to be fermented more fully, further improving the utilization efficiency of the biogas raw materials, and further improving the biogas production efficiency.

[0024] The present invention can conveniently clean the residues covered on the microorganism enrichment plate by arranging the telescopic parts, sleeves, adjustment rods, vertical rods, horizontal rods and rotating rods, thereby making the cleaning of the tank body more convenient and improving the cleaning efficiency, making the present invention more convenient to maintain and improving the maintenance efficiency.

[0025] 3. The present invention can prevent the outer ring from being separated from the rotating rod in the direction away from the inner ring, and prevent the inner ring from being separated from the rotating rod in the direction away from the outer ring by setting an outer limit ring and an inner limit ring, so that the assembly structure of the inner ring, the rotating rod and the outer ring is more solid and reliable, thereby eliminating the need for workers to spend time reassembling the inner ring, the rotating rod and the outer ring, thereby extending the operating time of the present invention and improving the production efficiency of biogas.

[0026] The present invention can hide the outer limiting ring in the outer limiting groove and hide the inner limiting ring in the inner limiting groove by setting the outer limiting groove and the inner limiting ring in the inner limiting groove, so that the space occupied by the outer limiting ring, the inner limiting ring, the outer ring and the inner ring is equal to the space occupied by the outer ring without the outer limiting groove and the inner ring without the inner limiting groove, so that the area of ​​the microbial enrichment plate can be increased, so as to place more biogas raw materials on the microbial enrichment plate, further improve the processing capacity of biogas raw materials, and further improve the production of biogas. Because if the outer limiting groove and the inner limiting groove are not set, the space occupied by the outer limiting ring, the inner limiting ring, the outer ring and the inner ring is equal to the sum of the spaces occupied by each of them, so it is necessary to reduce the area of ​​the microbial enrichment plate, thereby reducing the amount of biogas raw materials placed on the microbial enrichment plate, and then reducing the processing capacity of biogas raw materials and reducing the production of biogas.

[0027] 4. The present invention provides a mounting block on the outer ring and a mounting long groove matching the mounting block on the inner wall of the tank body, so that the outer ring can be easily installed. The outer ring and the tank body can be assembled by simply letting the outer ring fall on the bottom of the mounting long groove, making it more convenient to install the microorganism enrichment mechanism on the tank body and improving the installation efficiency.

[0028] 5. The present invention can improve the stirring efficiency of the stirring mechanism on the biogas raw materials at the bottom of the tank by arranging a plurality of blades, thereby improving the production efficiency of biogas.

[0029] 6. The present invention hinges the blades and the stirring shaft and provides a retractable assembly, so that the stirring shaft and the blades can be replaced without opening the sealing cover, thereby reducing the exposed area of ​​the inner cavity of the tank body, reducing the damage to the anaerobic environment, and thus reducing the inhibition on the survival and reproduction of biogas fermentation microorganisms, thereby further improving the fermentation efficiency and further improving the biogas production efficiency.

[0030] 7. The present invention provides a handle on the upper end surface of the driven gear to provide a gripping position for the staff to pull the stirring shaft upward, thereby facilitating the staff's operation, further improving the efficiency of replacing the stirring shaft and blades, and making the maintenance of the present invention more convenient.

[0031] 8. The present invention provides a connecting dovetail groove on the stirring shaft, which allows the connecting rod to slide up and down in the connecting dovetail groove, thereby reducing the space occupied by the connecting rod, so that the retractable mechanism can be more compact, so that the space occupied by the connecting rod and the stirring shaft is smaller than the space occupied by the stirring shaft without the connecting dovetail groove, and the area of ​​the microbial enrichment plate can be increased, so that more biogas raw materials can be placed on the microbial enrichment plate, further improving the processing capacity of biogas raw materials and further improving the biogas production. Because if the connecting dovetail groove is not provided, the space occupied by the connecting rod and the stirring shaft is the sum of the spaces occupied by each, and an inner ring with a larger inner diameter is required at this time, and the area of ​​the microbial enrichment plate needs to be reduced at this time, thereby reducing the amount of biogas raw materials placed on the microbial enrichment plate, and then reducing the processing capacity of biogas raw materials and reducing the biogas production.

[0032] 9. The present invention can further improve the sealing effect of the tank body and the protection of the anaerobic environment of the inner cavity of the tank body by providing the first sealing cover and the second sealing cover, thereby further preventing the outside air from interfering with the living environment of the biogas fermentation microorganisms, further making the survival and reproduction of the biogas fermentation microorganisms more stable, and further improving the biogas production efficiency. Because once the outside air enters, it is easy to inhibit the reproduction of the biogas fermentation microorganisms, thereby reducing the fermentation efficiency of the biogas raw materials, and then reducing the biogas production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a biogas generator with a built-in microorganism enrichment mechanism according to Example 1;

[0034] Figure 2 Schematic diagram of the internal structure of a biogas generator with a built-in microbial enrichment mechanism in Example 1 Figure 1 ;

[0035] Figure 3 for Figure 2 A partial enlarged view of point A;

[0036] Figure 4 for Figure 2 A partial enlarged view of point B;

[0037] Figure 5 Schematic diagram of the internal structure of a biogas generator with a built-in microbial enrichment mechanism in Example 1 Figure 2 ;

[0038] Figure 6 for Figure 5 A partial enlarged view of point C;

[0039] Figure 7 for Figure 6 A schematic diagram of a structure provided with a sealing gasket;

[0040] Figure 8 This is a schematic structural diagram of a biogas generator with a built-in microorganism enrichment mechanism provided with a first sealing cover and a second sealing cover in accordance with Example 1;

[0041] Fig. 9 Schematic diagram of the internal structure of a biogas generator with a built-in microbial enrichment mechanism in Example 2 Figure 1 ;

[0042] Fig.10 for Fig. 9 A local enlarged view of point D;

[0043] Fig.11 for Fig. 9 A local enlarged view of point E;

[0044] Fig.12 for Fig.11 A schematic diagram of a structure provided with a sealing ring;

[0045] Fig.13 It is a structural schematic diagram of the sealing ring;

[0046] Fig.14 This is a schematic structural diagram of a biogas generator with a built-in microorganism enrichment mechanism provided with a first sealing cover and a second sealing cover according to Example 2.

[0047] In the figure:

[0048] 1-tank body, 101-installation slot, 2-feed pipe, 3-discharge pipe, 4-sealing cover, 401-adjustment slot, 402-stirring hole, 403-feed window, 5-biogas pipe, 6-rotating rod, 7-inner ring, 701-inner limit slot, 8-outer ring, 801-outer limit slot, 9-microorganism enrichment plate, 10-vertical pole, 11-cross bar, 12-adjustment rod, 13-sleeve, 14-telescopic part, 15-outer limit ring, 16-inner limit ring , 17-mounting block, 18-stirring shaft, 1801-connecting dovetail groove, 19-blade, 20-motor, 21-driving gear, 22-driven gear, 23-support ring, 24-first sealing cover, 25-second sealing cover, 26-sealing pad, 27-handle, 28-retractable telescopic part, 29-connecting plate, 30-connecting rod, 31-connecting block, 32-retractable rod, 33-sealing ring, 3301-connecting hole, 34-feed cover. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1

[0051] like Figure 1 As shown, a biogas generator with a built-in microorganism enrichment mechanism includes a tank body 1, a sealing cover 4, a microorganism enrichment mechanism, and a stirring mechanism.

[0052] like Figure 1 As shown, the upper end of the tank body 1 is open, and a feed pipe 2 and a discharge pipe 3 are welded to the lower part of the tank body 1, and the feed pipe 2 and the discharge pipe 3 are both connected to the inner cavity of the tank body 1. A feed valve (not shown in the figure) is installed on the feed pipe 2, and a discharge valve (not shown in the figure) is installed on the discharge pipe 3.

[0053] like Figure 1 As shown, the sealing cover 4 is arranged above the tank body 1, and the sealing cover 4 is fixed to the upper end of the tank body 1 by screws. A biogas pipe 5 is welded above the sealing cover 4, and the biogas pipe 5 is connected to the inner cavity of the tank body 1. Figure 2 As shown, the sealing cover 4 is provided with a feed window 403 , and a feed cover plate 34 for covering the feed window 403 is fixed to the upper end surface of the sealing cover 4 by screws.

[0054] like Figure 1 and Figure 2 As shown, the microorganism enrichment mechanism is arranged in the inner cavity of the tank body 1, and the microorganism enrichment mechanism includes a rotating rod 6, an inner ring 7, an outer ring 8, a microorganism enrichment plate 9, a vertical rod 10, a horizontal rod 11, an adjustment rod 12, a sleeve 13, a telescopic member 14, and a sealing gasket 26.

[0055] like Figure 2 As shown, there are eight rotating rods 6 , and the eight rotating rods 6 are radially distributed with the inner ring 7 as the center.

[0056] One end of the rotating rod 6 is rotatably connected to the outer ring 8. Specifically, the outer ring 8 is provided with an outer rotating hole (not shown) that matches the rotating rod 6. The rotating rod 6 can rotate in the outer rotating hole. Figure 3 As shown, the outer ring 8 is provided with an outer limit groove 801 on the side away from the inner ring 7, and an outer limit ring 15 is provided in the outer limit groove 801. The outer diameter of the outer limit ring 15 is larger than the aperture of the outer rotating hole, and the outer limit ring 15 is welded and fixed to the rotating rod 6.

[0057] The other end of the rotating rod 6 is rotatably connected to the inner ring 7. Specifically, the inner ring 7 is provided with an inner rotating hole (not shown) that cooperates with the rotating rod 6. The rotating rod 6 can rotate in the inner rotating hole. Figure 4 As shown, the inner ring 7 is provided with an inner limit groove 701 on the side away from the outer ring 8, and an inner limit ring 16 is provided in the inner limit groove 701. The outer diameter of the inner limit ring 16 is larger than the aperture of the inner rotating hole, and the inner limit ring 16 is welded and fixed to the rotating rod 6.

[0058] like Figure 1 As shown, a mounting block 17 is welded to the outer ring 8 on the side away from the inner ring 7 , and an inner wall of the tank body 1 is provided with a mounting long groove 101 matching with the mounting block 17 , and the mounting block 17 can slide up and down along the mounting long groove 101 .

[0059] like Figure 2 As shown, the microorganism enrichment plate 9 is a mesh plate, and eight microorganism enrichment plates 9 are provided. One microorganism enrichment plate 9 is arranged above one rotating rod 6 , and one microorganism enrichment plate 9 is fixed to one rotating rod 6 by welding.

[0060] like Figure 5 As shown, eight vertical poles 10 are provided, and the lower end of one vertical pole 10 is welded and fixed to one microorganism enrichment plate 9 .

[0061] like Figure 5 As shown, the cross bar 11 is disposed between two adjacent vertical bars 10 , and the cross bar 11 is hinged to the upper ends of the vertical bars 10 .

[0062] like Figure 5 As shown, the lower end of the adjusting rod 12 is welded and fixed to the upper end of a vertical rod 10. Figure 6 As shown, the adjusting rod 12 cooperates with the adjusting long hole 401 provided on the sealing cover 4.

[0063] like Figure 7 As shown, the upper end surface of the sealing cover 4 is provided with a sealing gasket 26 for covering the adjusting long hole 401. The sealing gasket 26 is a rubber gasket. Two sealing gaskets 26 are arranged side by side. The sealing gasket 26 is fixed to the sealing cover 4 by screws. The adjusting rod 12 is matched with the gap between the two sealing gaskets 26.

[0064] like Figure 7 As shown, the sleeve 13 is sleeved on the adjusting rod 12 , and the sleeve 13 can slide up and down along the adjusting rod 12 .

[0065] like Figure 7 As shown, the telescopic member 14 adopts a first electric push rod, which is arranged on the upper end surface of the sealing cover 4, one end of the first electric push rod is fixed to the sealing cover 4 by screws, and the other end of the first electric push rod is hinged to the sleeve 13.

[0066] like Figure 1As shown, the stirring mechanism is arranged in the inner cavity of the tank body 1, and the stirring mechanism includes a stirring shaft 18, a driving component, and blades 19.

[0067] like Figure 2 As shown, the stirring shaft 18 is arranged on the side of the inner ring 7 away from the outer ring 8 (that is, the stirring shaft 18 is arranged in the inner ring of the inner ring 7), and the stirring shaft 18 cooperates with the stirring hole 402 arranged on the sealing cover 4, and the stirring shaft 18 can rotate in the stirring hole 402.

[0068] like Figure 5 As shown, the driving assembly includes a motor 20, a driving gear 21, a driven gear 22, and a support ring 23. The motor 20 is arranged on the upper end surface of the sealing cover 4, and the chassis of the motor 20 is fixed to the sealing cover 4 by screws. The driving gear 21 is welded and fixed to the output shaft of the motor 20. The driven gear 22 is welded and fixed to the stirring shaft 18. The driving gear 21 and the driven gear 22 cooperate. The outer diameter of the support ring 23 is larger than the aperture of the stirring hole 402, and the support ring 23 is arranged between the driven gear 22 and the sealing cover 4, and the support ring 23 is welded and fixed to the stirring shaft 18.

[0069] like Figure 2 As shown, there are eight blades 19, four in each group, and there are two groups in total. The two groups of blades 19 are arranged below the microorganism enrichment plate 9. The four blades 19 in each group are radially distributed with the stirring shaft 18 as the center, and the blades 19 are welded and fixed to the stirring shaft 18.

[0070] like Figure 8 As shown, the upper end surface of the sealing cover 4 is provided with a first sealing cover 24 and a second sealing cover 25, and the first sealing cover 24 and the second sealing cover 25 are both fixed to the upper end surface of the sealing cover 4 by screws. The driving assembly is arranged in the first sealing cover 24. The telescopic member 14, the sleeve 13, the sealing gasket 26, and the part of the adjusting rod 12 exposed from the sealing cover 4 are all arranged in the second sealing cover 25.

[0071] When biogas production is required: first, open the feed valve, and deliver biogas raw materials and biogas fermentation microorganisms to the bottom of the tank body 1 from the feed pipe 2, and close the feed valve after delivery. Then, open the feed cover 34, and lay a layer of biogas raw materials and biogas fermentation microorganisms on the microorganism enrichment plate 9 from the feed window 403 of the sealing cover 4, and close the feed cover 34 after laying. Then, the biogas raw materials standing at the bottom of the tank body 1 and the biogas raw materials laid on the microorganism enrichment plate 9 will be decomposed and fermented by the biogas fermentation microorganisms to produce biogas, and the produced biogas will flow out from the biogas pipe 5 for collection.

[0072] As the biogas raw materials continue to ferment, the biogas raw materials standing at the bottom of the tank body 1 will be stratified, from bottom to top, there are sediment layer, active layer, clear liquid layer, and scum layer. There are many biogas fermentation microorganisms in the active layer, but few biogas raw materials, and there is not enough biogas raw material to produce biogas. There are relatively few biogas fermentation microorganisms and biogas raw materials in the clear liquid layer. There are many biogas raw materials in the scum layer, but few biogas fermentation microorganisms, which will cause the biogas raw materials in the scum layer to be insufficiently fermented.

[0073] For this, a stirring mechanism is required to stir the biogas raw materials that have stratified phenomena. On the one hand, the biogas raw materials that have stratified phenomena are fully mixed, so that the biogas raw materials in the scum layer can be fully contacted with the biogas fermentation microorganisms in other layers (active layer, clear liquid layer), thereby improving the utilization efficiency and fermentation efficiency of the biogas raw materials in the scum layer, and improving the biogas production efficiency. On the other hand, the biogas in the clear liquid layer and the active layer below the scum layer can flow upward, avoiding the biogas in the clear liquid layer and the active layer below the scum layer from being blocked by the scum layer and unable to flow upward, thereby improving the biogas collection efficiency.

[0074] Specifically: when it is necessary to stir the biogas raw materials at the bottom of the tank body 1: the staff starts the motor 20, the output shaft of the motor 20 rotates, the driving gear 21 welded and fixed to the output shaft of the motor 20 rotates, the driven gear 22 matched with the driving gear 21 rotates, the stirring shaft 18 welded and fixed to the driven gear 22 rotates in the stirring hole 402 of the sealing cover 4, the support ring 23 welded and fixed to the stirring shaft 18 rotates on the upper end surface of the sealing cover 4, and the blade 19 welded and fixed to the stirring shaft 18 rotates. During the rotation of the blade 19, the rotating blade 19 can stir the biogas raw materials with stratification at the bottom of the tank body 1.

[0075] In addition, because the survival and reproduction of biogas fermentation microorganisms should be static rather than dynamic, if they are frequently stirred, the survival and reproduction of biogas fermentation microorganisms will be disturbed, so the stirring times are reduced as much as possible. During the period when the biogas raw material is not stirred, since the microbial enrichment plate 9 is covered with biogas raw material and biogas fermentation microorganisms, as the biogas fermentation microorganisms continue to reproduce, the biogas fermentation microorganisms and the decomposed biogas raw material can fall onto the scum layer, and the biogas fermentation microorganisms are added to the scum layer, so that the biogas raw material in the scum layer is fermented more fully, the utilization efficiency and fermentation efficiency of the biogas raw material in the scum layer are improved, and the biogas production efficiency is improved.

[0076] Therefore, the biogas generator with a built-in microorganism enrichment mechanism of this embodiment is particularly suitable for occasions where the biogas raw material is stirred less frequently or even not stirred at all, and where the fermentation efficiency of the biogas raw material in the scum layer needs to be improved and the biogas production efficiency needs to be improved.

[0077] Furthermore, the biogas generator with a built-in microorganism enrichment mechanism of this embodiment can improve the space utilization efficiency of the inner cavity of the tank body 1 by arranging the microorganism enrichment mechanism on the upper part of the tank body, increase the processing capacity of biogas raw materials, and increase the production of biogas.

[0078] Furthermore, by arranging the microbial enrichment plate 9 between the inner ring 7 and the outer ring 8, the microbial enrichment plate 9 can be located directly above the scum layer at the bottom of the tank body 1, so that the biogas fermentation microorganisms and the decomposed biogas raw materials on the microbial enrichment plate 9 can fall more evenly onto the scum layer at the bottom of the tank body 1, thereby further making the biogas raw materials in the scum layer ferment more fully, further improving the utilization efficiency of the biogas raw materials, and further improving the biogas production efficiency.

[0079] After the biogas raw materials are fermented, residues that cannot be fermented are left at the bottom of the tank body 1 and on the microorganism enrichment plate 9. At this time, the tank body 1 needs to be cleaned.

[0080] During cleaning: First, the staff starts the first electric push rod, which extends. The extended first electric push rod pushes the sleeve 13, so that the adjustment rod 12 in the sleeve 13 tilts from the adjustment long hole 401 in the direction away from the first electric push rod, and a vertical rod 10 welded and fixed to the adjustment rod 12 also tilts along with the adjustment rod 12. Because the upper ends of two adjacent vertical rods 10 are hinged by the cross bar 11, all vertical rods 10 will tilt, and the microorganism enrichment plate 9 welded and fixed to the lower end of the vertical rod 10 can rotate and tilt with the rotating rod 6 as the rotation center. When the microorganism enrichment plate 9 tilts, the residue on the upper end surface of the microorganism enrichment plate 9 will slide to the bottom of the tank body 1. Then, the staff opens the discharge valve and pumps out the residue at the bottom of the tank body 1 from the discharge pipe 3. After cleaning, close the discharge valve.

[0081] Through the above-mentioned cleaning process of the tank body 1, it can be known that by arranging the first electric push rod, the sleeve 13, the adjusting rod 12, the vertical rod 10, the horizontal rod 11, and the rotating rod 6, the residue covering the microorganism enrichment plate 9 can be easily cleaned, thereby making the cleaning of the tank body 1 more convenient and improving the cleaning efficiency, making the biogas generator with a built-in microorganism enrichment mechanism in this embodiment 1 more convenient to maintain and improving the maintenance efficiency.

[0082] Example 2

[0083] This embodiment 2 is the same as embodiment 1, except that Fig.10 As shown, in this embodiment 2, the blade 19 is hinged to the stirring shaft 18, as shown in FIG. Fig.11 As shown, a handle 27 is welded to the upper end surface of the driven gear 22, and the stirring mechanism also includes a retractable assembly.

[0084] like Fig. 9 and Fig.10 As shown, the retractable assembly includes a retractable telescopic member 28 , a connecting plate 29 , a connecting rod 30 , a connecting block 31 , and a retractable rod 32 .

[0085] like Fig. 9 As shown, the retractable member 28 adopts a second electric push rod, the lower end of the second electric push rod is fixed to the upper end surface of the stirring shaft 18 by screws, and the upper end of the second electric push rod is welded and fixed to the connecting plate 29.

[0086] like Fig.11 As shown, the stirring shaft 18 is provided with four connecting dovetail grooves 1801, and the connecting rod 30 is arranged in the connecting dovetail grooves 1801. Fig. 9 As shown, the upper end of the connecting rod 30 is welded and fixed to the connecting plate 29 .

[0087] like Fig.10 As shown, the connecting block 31 cooperates with the connecting dovetail groove 1801 , the connecting block 31 can slide up and down along the connecting dovetail groove 1801 , and the connecting block 31 is welded and fixed to the connecting rod 30 .

[0088] like Fig.10 As shown, the retractable rod 32 is arranged above the blade 19 , the upper end of the retractable rod 32 is hinged to the connecting block 31 , and the lower end of the retractable rod 32 is hinged to the blade 19 .

[0089] like Fig.12 and Fig.13 As shown, the upper end surface of the driven gear 22 is provided with a sealing ring 33 that cooperates with the connecting dovetail groove 1801. The sealing ring 33 also adopts a rubber pad. The sealing ring 33 is fixed to the upper end surface of the driven gear 22 by screws. The sealing ring 33 is provided with a connecting hole 3301 that cooperates with the connecting rod 30. The connecting rod 30 can slide up and down in the connecting hole 3301.

[0090] like Fig.14 As shown, the handle 27 , the second electric push rod, the connecting plate 29 , the portion of the connecting rod 30 exposed from the sealing cover 4 , and the sealing ring 33 of the second embodiment are all arranged in the first sealing cover 24 .

[0091] With the continuous use of the stirring mechanism, the stirring shaft 18 and the stirring blade 19 rust and their strength decreases as the use time increases, so the stirring shaft 18 and the stirring blade 19 need to be replaced.

[0092] In Example 1, when the blades 19 and the stirring shaft 18 need to be replaced, the sealing cover 4 needs to be removed first, and then the sealing cover 4 is lifted upward until the stirring shaft 18 is completely pulled out of the tank body 1. Since the length of the blade 19 is greater than the inner diameter of the inner ring 7, during the upward movement of the stirring shaft 18, the blade 19 will lift the microbial enrichment mechanism upward together, so that the biogas fermentation microorganisms on the microbial enrichment plate 9 and the biogas fermentation microorganisms at the bottom of the tank body 1 are all exposed to the outside, destroying the anaerobic environment, thereby greatly inhibiting the survival and reproduction of biogas fermentation microorganisms, reducing the fermentation efficiency, and thus reducing the biogas production efficiency.

[0093] In the second embodiment, first, the first sealing cover 24 is opened, and the staff starts the second electric push rod, which is shortened. The shortened second electric push rod moves down with the connecting plate 29, and the connecting rod 30 welded and fixed to the connecting plate 29 moves down together with the connecting plate 29, and the connecting block 31 welded and fixed to the lower end of the connecting rod 30 moves down together with the connecting rod 30, and the connecting block 31 moves down with the retracting rod 32. Since the length of the retracting rod 32 remains unchanged, the lower end of the retracting rod 32 abuts against the blade 19, so that the blade 19 rotates downward with the hinge of the blade 19 and the stirring shaft 18 as the rotation center, so that the blade 19 is close to the stirring shaft 18, and the second electric push rod is closed. At this time, since the blade 19 is close to the stirring shaft 18, the blade 19 and the stirring shaft 18 can pass through the inner ring of the inner ring 7 and the stirring hole 402 on the sealing cover 4.

[0094] Then, the staff grasps the handle 27 and lifts it upward, and the driven gear 22 welded and fixed to the handle 27 is lifted up together, and the stirring shaft 18 welded and fixed to the driven gear 22 is pulled out from the inner ring of the inner ring 7 and the stirring hole 402 of the sealing cover 4 from bottom to top together with the blades 19.

[0095] Next, the staff inserts the new stirring shaft 18 with the blades 19 into the stirring hole 402 of the sealing cover 4 and the inner ring of the inner ring 7 from top to bottom, until the support ring 23 falls on the upper end surface of the sealing cover 4 and the driven gear 22 cooperates with the driving gear 21.

[0096] Finally, the staff starts the second electric push rod, which extends. The extended second electric push rod pushes the connecting plate 29 upward, and the connecting plate 29 moves upward with the connecting rod 30, and the connecting rod 30 moves upward with the connecting block 31. The connecting block 31 pulls the upper end of the retracting rod 32 upward. As the retracting rod 32 moves upward, the blade 19 hinged to the lower end of the retracting rod 32 rotates upward with the hinge between the blade 19 and the stirring shaft 18 as the rotation center. When the blade 19 rotates to a horizontal position, the second electric push rod is closed, and the first sealing cover 24 is closed.

[0097] It can be known from the above-mentioned use process that in this embodiment 2, by hingedly connecting the blade 19 with the stirring shaft 18, welding a handle 27 on the upper end surface of the driven gear 22, and providing a retractable assembly, the stirring shaft 18 and the blade 19 can be replaced without opening the sealing cover 4, thereby reducing the exposed area of ​​the inner cavity of the tank body 1, thereby reducing the damage to the anaerobic environment. Compared with embodiment 1, the inhibition on the survival and reproduction of biogas fermentation microorganisms is reduced, thereby further improving the fermentation efficiency and further improving the biogas production efficiency.

[0098] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A biogas generator with a built-in microbial enrichment mechanism, characterized in that: It includes a tank body, a sealing cover, a microorganism enrichment mechanism, and a stirring mechanism. The upper end of the tank body is open, the tank body is provided with a feed pipe and a discharge pipe, the sealing cover is connected to the upper end of the tank body, the sealing cover is provided with a biogas pipe, the feed pipe, the discharge pipe, and the biogas pipe are all connected to the inner cavity of the tank body, the microorganism enrichment mechanism and the stirring mechanism are both arranged in the inner cavity of the tank body, the microorganism enrichment mechanism is connected to the upper part of the tank body, and the stirring mechanism is connected to the sealing cover; The microorganism enrichment mechanism comprises a rotating rod, an inner ring, an outer ring, a microorganism enrichment plate, a vertical rod, a horizontal rod, an adjusting rod, a sleeve, a telescopic part, and a sealing pad; There are multiple rotating rods, microbial enrichment plates, and vertical poles; All the rotating rods are radially distributed with the inner ring as the center, the outer ring is provided with an outer rotating hole rotatably matched with the rotating rod, the outer ring is provided with an outer limiting groove on the side away from the inner ring, an outer limiting ring connected to the rotating rod is provided in the outer limiting groove, the outer diameter of the outer limiting ring is larger than the aperture of the outer rotating hole, the inner ring is provided with an inner rotating hole rotatably matched with the rotating rod, the inner ring is provided with an inner limiting groove on the side away from the outer ring, an inner limiting ring connected to the rotating rod is provided in the inner limiting groove, and the outer diameter of the inner limiting ring is larger than the aperture of the inner rotating hole; The outer ring is provided with a mounting block on a side away from the inner ring, and the inner wall of the tank body is provided with a mounting long groove matched with the mounting block; A microorganism enrichment plate is connected to a rotating rod, the lower end of a vertical rod is connected to a microorganism enrichment plate, a cross bar is arranged between two adjacent vertical rods, the cross bar is hinged to the upper end of the vertical rod, the lower end of the adjusting rod is connected to the upper end of an upright rod, the adjusting rod cooperates with the adjusting long hole arranged on the sealing cover, the sleeve is slidably connected to the adjusting rod, the telescopic part is arranged on the upper end surface of the sealing cover, one end of the telescopic part is connected to the sealing cover, the other end of the telescopic part is hinged to the sleeve, the upper end surface of the sealing cover is provided with a sealing gasket for covering the adjusting long hole, two sealing gaskets are arranged side by side, and the gap between the adjusting rod and the two sealing gaskets cooperates.

2. A biogas generator with a built-in microorganism enrichment mechanism as claimed in claim 1, characterized in that: The stirring mechanism includes a driving assembly, a stirring shaft, and blades. The stirring shaft is arranged on a side of the inner ring away from the outer ring. The stirring shaft cooperates with a stirring hole arranged on the sealing cover. The stirring shaft is rotatably connected to the sealing cover through the driving assembly. The blades are arranged below the microorganism enrichment plate. A plurality of blades are provided, and the blades are connected to the stirring shaft.

3. A biogas generator with a built-in microorganism enrichment mechanism as claimed in claim 2, characterized in that: The driving assembly includes a motor, a driving gear, a driven gear, and a support ring. The motor is arranged on the upper end surface of the sealing cover, the motor is connected to the sealing cover, the driving gear is connected to the output shaft of the motor, the driven gear is connected to the stirring shaft, the driving gear cooperates with the driven gear, the support ring is arranged between the driven gear and the sealing cover, the support ring is connected to the stirring shaft, and the outer diameter of the support ring is larger than the aperture of the stirring hole.

4. A biogas generator with a built-in microorganism enrichment mechanism as claimed in claim 3, characterized in that: The stirring mechanism also includes a retractable component, which includes a retractable telescopic part, a connecting plate, a connecting rod, and a connecting block. The retractable rod, the lower end of the retractable telescopic part is connected to the upper end of the stirring shaft, the upper end of the retractable telescopic part is connected to the connecting plate, the connecting plate is connected to the upper end of the connecting rod, the lower end of the connecting rod is connected to the connecting block, the connecting block is slidably connected to the stirring shaft, the connecting block slides up and down along the stirring shaft, the retractable rod is arranged above the blade, the upper end of the retractable rod is hinged to the connecting block, the lower end of the retractable rod is hinged to the blade, and the blade is hinged to the stirring shaft.

5. A biogas generator with a built-in microorganism enrichment mechanism as claimed in claim 4, characterized in that: A handle is provided on the upper end surface of the driven gear.

6. A biogas generator with a built-in microorganism enrichment mechanism as claimed in claim 5, characterized in that: The stirring shaft is provided with a connecting dovetail groove, the connecting rod is arranged in the connecting dovetail groove, the connecting block cooperates with the connecting dovetail groove, the upper end surface of the driven gear is provided with a sealing ring that cooperates with the connecting dovetail groove, and the sealing ring is provided with a connecting hole that cooperates with the connecting rod.

7. A biogas generator with a built-in microorganism enrichment mechanism as claimed in claim 6, characterized in that: The upper end surface of the sealing cover is provided with a first sealing cover and a second sealing cover, the driving assembly, the retractable telescopic part, the connecting plate, the part of the connecting rod exposed from the sealing cover, the handle, and the sealing ring are all arranged in the first sealing cover, and the telescopic part, the sleeve, the sealing gasket, and the part of the adjusting rod exposed from the sealing cover are all arranged in the second sealing cover.

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