Microbial carbon source preparation device based on solid waste treatment

Abstract

The application discloses a kind of microbial carbon source preparation device based on solid waste treatment, including fermentation tank and auger conveying mechanism, fermentation tank is equipped with heating part, heating part is used to heat the material in fermentation tank, the top of fermentation tank is equipped with inlet, the upper portion of fermentation tank is equipped with discharge port;Auger conveying mechanism includes machine shell, spiral blade and driving part, machine shell is tubular structure, one end of machine shell is communicated with the bottom of fermentation tank, machine shell gradually inclines and extends upwards along the direction away from fermentation tank, driving part is installed at one end of machine shell away from the bottom of fermentation tank, driving part is used to drive spiral blade rotation;The upper end of machine shell is connected with the upper portion of fermentation tank between backflow pipe, fermentation tank is equipped with backflow port for communicating backflow pipe, backflow pipe is equipped with first switch valve;The upper end of machine shell is connected with mud discharge pipe, the connecting part between mud discharge pipe and machine shell is higher than discharge port, mud discharge pipe is equipped with second switch valve.

Description

Technical Field

[0001] The present application relates to the field of sludge treatment devices, and in particular to a microbial carbon source preparation device based on solid waste treatment. Background Art

[0002] The large amount of sludge generated by sewage treatment is difficult to treat and dispose of. As solid waste in the sewage treatment process, sludge is a major problem in resource utilization.

[0003] Traditional solutions for municipal wastewater treatment plants require the provision of an external carbon source to the biological treatment system to accelerate the efficiency of biological denitrification and phosphorus removal. Primary sludge contains a large amount of organic matter, but most of this organic matter consists of high-molecular-weight carbohydrates, proteins, and fats, all of which are slow-moving organic carbon sources. These substances are not separated from the sludge, making them difficult to use as a carbon source for the denitrification and phosphorus removal reactions. Therefore, there is an urgent need for a device that can convert the organic matter in primary sludge into a carbon source that can be utilized by biological denitrification and phosphorus removal. Summary of the Invention

[0004] In order to convert organic matter in primary sludge into a carbon source that can be utilized for biological denitrification and phosphorus removal, the present application provides a microbial carbon source preparation device based on solid waste treatment.

[0005] The present application provides a microbial carbon source preparation device based on solid waste treatment, which adopts the following technical solutions:

[0006] The top of the fermenter is provided with a mud inlet, and the upper part of the fermenter is provided with a discharge port; the auger conveying mechanism comprises a casing, a spiral blade and a driving member, the casing is a tubular structure, one end of the casing is connected to the bottom of the fermenter, the casing gradually extends upward in a direction away from the fermenter, the driving member is installed at the end of the casing away from the bottom of the fermenter, and the driving member is used to drive the spiral blade to rotate; a reflux pipe is connected between the upper end of the casing and the upper part of the fermenter, the fermenter is provided with a reflux port for connecting to the reflux pipe, and the reflux pipe is provided with a first switch valve; the upper end of the casing is connected to a mud discharge pipe, the connection part between the mud discharge pipe and the casing is higher than the discharge port, and the mud discharge pipe is provided with a second switch valve.

[0007] By adopting the technical scheme, the sludge is poured into the inside of the fermentation tank through the sludge inlet, so that the mixture of sludge and water is contained in the fermentation tank, and the heating piece heats the mixture of sludge and water in the fermentation tank, so as to promote the growth and fermentation of microorganisms in the fermentation tank, decompose the organic matter in the sludge by the microorganisms, and decompose the slow organic carbon source into the fast organic carbon source. With the increase of the sludge addition amount in the fermentation tank or the water injection into the fermentation tank, the water in the fermentation tank can overflow from the discharge port. In the fermentation process of the fermentation tank, the auger conveying mechanism conveys the sludge deposited at the bottom of the fermentation tank, and gradually inclines upward. When the first switch valve is opened and the second switch valve is closed, the auger conveying mechanism sends the sludge into the reflux pipe and refluxes the sludge into the fermentation tank through the reflux pipe, so that the sludge produces circulating flow and is stirred, so as to accelerate the fermentation of the organic matter in the sludge. After a certain time of fermentation, the first switch valve is switched to closed, and the second switch valve is switched to opened. At this time, the auger conveying mechanism conveys the sludge to the sludge discharge pipe, so that the fermented sludge is discharged from the sludge discharge pipe. Since the connecting position between the sludge discharge pipe and the machine shell is higher than the connecting position between the discharge pipe and the machine shell, the water in the fermentation tank is not easy to overflow from the sludge discharge pipe.

[0008] The microbial carbon source preparation device utilizes the residual nutrients in the sludge to culture microorganisms that decompose cellulose. The cultured microorganisms decompose cellulose in the sludge into fermentation products such as cellobiose and glucose. The fermentation products can be used as carbon sources in the sewage treatment system, making it easier for denitrifying bacteria to utilize nitrogen and further enhancing the efficiency of denitrification.

[0009] Optionally, the connecting position between the machine shell and the sludge discharge pipe is higher than the connecting position between the machine shell and the reflux pipe.

[0010] By adopting the above technical scheme, since the connecting position between the machine shell and the sludge discharge pipe is higher than the connecting position between the machine shell and the reflux pipe, when the sludge flows from the machine shell into the reflux pipe, the sludge is not easy to enter the sludge discharge pipe, which is beneficial to reduce the problem of sluggishness of the opening and closing of the second switch valve caused by the sludge accumulation in the sludge discharge pipe.

[0011] Optionally, the reflux port is higher than the discharge port, and the inner wall of the fermentation tank is provided with an inclined guide plate. The inclined guide plate is located below the port through which the reflux pipe communicates with the fermentation tank, and the inclined guide plate extends downward in a direction away from the inner wall of the fermentation tank to a position lower than the discharge port.

[0012] By adopting this technical solution, the water level within the fermentation tank is primarily determined by the height of the discharge port. The return pipe's connection port to the fermentation tank is higher than the discharge port, preventing water from flowing into the return pipe. Sludge flowing from the return pipe falls onto the inclined guide plate, then flows along the surface of the inclined guide plate into the fermentation tank. Guided by the inclined guide plate, the sludge flowing into the fermentation tank is less likely to cause water surges within the fermentation tank, thus slowing the diffusion of sludge into the upper layer of liquid within the fermentation tank and, consequently, reducing the sludge content of the water discharged from the discharge port.

[0013] Optionally, an annular partition is provided on the inner side of the fermentation tank, the mud inlet is located within the surrounding range of the annular partition, the center line of the annular partition is vertically arranged, and an annular area is formed between the outer peripheral wall of the annular partition and the inner wall of the fermentation tank; the upper edge of the annular partition is higher than the discharge port, and the annular partition is connected to the inner wall of the fermentation tank by a plurality of connecting plates, and the connecting plates divide the annular area between the annular partition and the fermentation tank into a plurality of different separation areas, and the discharge port and the reflux pipe respectively correspond to different separation areas.

[0014] By adopting this technical solution, an annular area is formed between the annular baffle and the inner wall of the fermenter, and the connecting plate divides the annular area between the annular baffle and the fermenter into multiple compartments. When sludge flows back into the fermenter from the return pipe, the sludge will flow and diffuse within the fermenter. By assigning the discharge port and the return pipe to different compartments, the diffusion of sludge to the discharge port can be further reduced, thereby minimizing sludge outflow from the discharge port.

[0015] Optionally, the discharge port is located on the side of the fermentation tank away from the reflux port; the annular partition is a cylindrical structure, the inner wall of the upper part of the fermentation tank is a cylindrical surface, the annular partition is eccentrically arranged between the fermentation tank, and the annular partition is biased towards the side of the discharge port on the inner side of the fermentation tank, and a narrow gap is formed between the annular partition and the inner wall of the fermentation tank corresponding to the discharge port.

[0016] By adopting the above technical solution, a narrow gap is formed between the annular partition and the area corresponding to the discharge port of the fermentation tank, so that the water flow exchange between the area corresponding to the discharge port between the annular partition and the inner wall of the fermentation tank and other areas inside the fermentation tank is slow, making it difficult for solid matter in the fermentation tank to flow to the discharge port, thereby helping to reduce the discharge of solid matter in the fermentation tank from the discharge port.

[0017] Optionally, the casing is connected to an aeration pipe, and a connection portion between the aeration pipe and the casing is located within a feeding range of the spiral blade.

[0018] By adopting the above technical solution, the aeration pipe conveys air to the casing of the spiral conveying mechanism, which is beneficial to increasing the oxygen content of the sludge in the spiral conveying mechanism, thereby helping to accelerate the fermentation speed of the sludge in the spiral conveying mechanism.

[0019] Optionally, the axis of the aeration pipe close to one end of the casing is not perpendicular to the center line of the spiral blade.

[0020] By adopting the above technical solution, the axis of the aeration pipe near one end of the casing is eccentrically perpendicular to the center line of the spiral blade, so that the air sent into the casing by the aeration pipe enters the casing along the tangent direction of the inner wall of the casing, which is beneficial to increase the movement distance of the air sent into the casing by the aeration pipe, and further helps to further increase the dissolved oxygen content of the sludge in the casing.

[0021] Optionally, the upper edge of the annular partition abuts the top wall of the fermentation tank, the lower edge of the annular partition is lower than the discharge port, the annular partition is connected to an exhaust pipe, the inner cavity of the exhaust pipe is connected to the inner cavity of the reflux pipe, and the other end of the exhaust pipe extends downward to a position below the discharge port.

[0022] By adopting this technical solution, the upper edge of the annular baffle abuts the top wall of the fermenter, while the lower edge extends below the liquid level in the fermenter. This creates a closed space between the annular baffle and the inner wall of the fermenter, corresponding to the reflux port. When air is blown into the housing through the aeration pipe, it flows through the reflux pipe between the annular baffle and the inner wall of the fermenter, and then through the exhaust pipe into the sewage inside the fermenter. This air output from the aeration pipe indirectly aerates the sewage within the fermenter, increasing the dissolved oxygen content of the sewage within the fermenter and thereby improving fermentation efficiency.

[0023] Optionally, a plurality of baffles are provided on the surface of the spiral blade, and the plurality of baffles are arranged at intervals along the spiral extension direction of the spiral blade.

[0024] By adopting the above technical solution, when the driving member drives the spiral blade to rotate, the baffle on the surface of the spiral blade can rotate and stir the sludge in the casing, which is conducive to more complete contact between the sludge in the casing and the air.

[0025] Optionally, the pitch of the spiral blade gradually decreases from bottom to top.

[0026] By adopting the above technical solution, the pitch of the spiral blade gradually decreases from bottom to top. When the spiral blade spirally conveys the sludge, the sludge in the casing is gradually squeezed by the spiral blade. As the sludge gradually moves away from the bottom of the fermentation tank, the moisture content of the sludge gradually decreases, which is beneficial to reducing the moisture content of the sludge discharged by the spiral conveying mechanism, thereby helping to reduce the load of subsequent sludge dehydration work.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The microbial carbon source preparation device uses the remaining nutrients in the sludge to cultivate microorganisms that decompose cellulose. The cultivated microorganisms decompose the cellulose in the sludge into fermentation products such as cellobiose and glucose. The fermentation products can be input into the sewage treatment system as a carbon source, making it easier for denitrifying bacteria to denitrify and further enhance the denitrification efficiency.

[0029] 2. The aeration pipe conveys air to the casing of the spiral conveying mechanism, which is beneficial to increasing the oxygen content of the sludge in the spiral conveying mechanism, thereby helping to accelerate the fermentation speed of the sludge in the spiral conveying mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of this embodiment.

[0031] Figure 2 This is a schematic diagram of the embodiment used to illustrate the connection relationship between the annular partition and the fermentation tank.

[0032] Description of reference numerals:

[0033] 1. Fermentation tank; 11. Mud inlet; 12. Discharge port; 13. Return port; 14. Annular area; 141. Partition area; 15. Discharge pipe; 2. Auger conveying mechanism; 21. Casing; 211. Feed hopper; 22. Spiral blade; 23. Drive element; 3. Heating element; 4. Annular partition; 41. Connecting plate; 42. Exhaust pipe; 5. Return pipe; 51. First switch valve; 6. Mud discharge pipe; 61. Second switch valve; 7. Support frame; 8. Inclined guide plate; 9. Aeration pipe; 91. Pneumatic switch valve. DETAILED DESCRIPTION

[0034] The following is combined with Figures 1-2 This application is described in further detail.

[0035] The present application discloses a microbial carbon source preparation device based on solid waste treatment. Figure 1 The microbial carbon source preparation device based on solid waste treatment includes a fermentation tank 1 and an auger conveying mechanism 2; the fermentation tank 1 has a top wall, the top wall of the fermentation tank 1 is provided with a mud inlet 11, and a heating element 3 for heating the material inside the fermentation tank 1 is installed on the top of the fermentation tank 1; the outer wall of the upper part of the fermentation tank 1 is connected to a discharge pipe 15, the discharge pipe 15 is used to discharge the upper fermentation material, and the fermentation tank 1 is provided with a discharge port 12 connected to the discharge pipe 15.

[0036] The auger conveying mechanism 2 includes a casing 21, a spiral blade 22 and a driving member 23. The casing 21 is a circular tubular structure. One end of the casing 21 is connected to the bottom of the fermentation tank 1. The casing 21 gradually extends upward in a direction away from the fermentation tank 1. The spiral blade 22 is coaxially arranged with the casing 21. The driving member 23 is installed at the upper end of the casing 21. The driving member 23 is a reduction motor. The driving member 23 is used to drive the spiral blade 22 to rotate.

[0037] A reflux pipe 5 is connected between the upper end of the casing 21 and the fermenter 1. A reflux port 13 is formed in the upper portion of the fermenter 1, communicating with the reflux pipe 5. This port is located on the side of the fermenter 1 away from the discharge port 12 and is higher than the discharge port 12. The reflux pipe 5 gradually slopes downward away from the casing 21 and is equipped with a first on-off valve 51. A mud discharge pipe 6 is provided at the upper end of the casing 21. The connection between the mud discharge pipe 6 and the casing 21 is higher than the connection between the mud discharge pipe 5 and the casing 21. The mud discharge pipe 6 is equipped with a second on-off valve 61 and is used to connect to equipment such as a centrifuge or filter press. The first and second on-off valves 51, 61 can be gate valves or gate valves.

[0038] Water-containing sludge is fed into the fermentation tank 1 through the mud inlet 11 for fermentation. During fermentation, the sludge is transported by the auger conveying mechanism 2. With the first on-off valve 51 open and the second on-off valve 61 closed, the auger conveying mechanism 2 delivers the sludge into the return pipe 5, where it flows back into the fermentation tank 1, creating a circulating sludge flow and agitation, accelerating fermentation. After a certain period of fermentation, the first on-off valve 51 is closed and the second on-off valve 61 is opened. The auger conveying mechanism 2 then transports the sludge to the sludge discharge pipe 6, where the fermented sludge is discharged.

[0039] Reference Figure 1 The upper portion of the fermentation tank 1 is cylindrical, while the lower portion is conical, with the diameter gradually decreasing from top to bottom. A support frame 7 is fixedly connected to the outer side wall of the lower portion of the fermentation tank 1. The support frame 7 is used to elevate the bottom wall of the fermentation tank 1. There is a height difference between the bottom wall of the fermentation tank 1 and the support surface of the support frame 7. The housing 21 of the auger conveying mechanism 2 is provided with a feed hopper 211, which is connected to the fermentation tank 1 via the feed hopper 211.

[0040] Reference Figure 1 and Figure 2 An annular partition 4 is provided on the inside of the fermentation tank 1, and the mud inlet 11 is located within the surrounding range of the annular partition 4. The annular partition 4 is a cylindrical structure, and the center line of the annular partition 4 is vertically arranged. The upper edge of the annular partition 4 abuts the top wall of the fermentation tank 1, and the lower edge of the annular partition 4 is lower than the discharge port 12. An annular area 14 is formed between the annular partition 4 and the inner wall of the fermentation tank 1.

[0041] The outer peripheral wall of the annular baffle 4 is connected to the inner wall of the fermenter 1 via a plurality of connecting plates 41. The connecting plates 41 divide the annular region 14 between the annular baffle 4 and the fermenter 1 into a plurality of different partitions 141. The discharge port 12 and the return port 13 correspond to different partitions 141, respectively. Thus, when sludge flows back into the fermenter 1 from the return port 13, the sludge is less likely to spread to the discharge port 12.

[0042] Reference Figure 1 and Figure 2 The annular partition 4 is eccentrically arranged with respect to the upper part of the fermentation tank 1, and the annular partition 4 is biased toward the side close to the discharge port 12. A slit is formed between the annular partition 4 and the portion of the upper part of the fermentation tank 1 corresponding to the discharge port 12, so that the water flow exchange between the area corresponding to the discharge port 12 between the annular partition 4 and the inner wall of the fermentation tank 1 and other areas inside the fermentation tank 1 is slow, so that the solid matter in the fermentation tank 1 is not easy to flow to the discharge port 12.

[0043] Reference Figure 1 The inner wall of the fermentation tank 1 is provided with an inclined guide plate 8, which is located below the reflux port 13. The inclined guide plate 8 extends gradually downward away from the inner wall of the fermentation tank 1, and the lower edge of the inclined guide plate 8 is lower than the discharge port 12. The inclined guide plate 8 is used to receive the sludge discharged from the reflux port 13, allowing the sludge to slowly slide below the liquid level in the fermentation tank 1, thereby reducing the sludge from surging and spreading after flowing back into the fermentation tank 1.

[0044] Reference Figure 1 The housing 21 is connected to an aeration pipe 9, which is used to supply compressed air to the inside of the housing 21. The connection between the aeration pipe 9 and the housing 21 is located within the feeding range of the spiral blades 22. A pneumatic switch valve 91 is installed at the end of the aeration pipe 9 near the housing 21. The pneumatic switch valve 91 and the aeration pipe 9 are connected to the same air source. When the pneumatic switch valve 91 is open, the aeration pipe 9 also receives compressed air, thereby preventing sludge in the housing 21 from flowing back into the aeration pipe 9.

[0045] Reference Figure 1 Annular baffle 4 is connected to an exhaust pipe 42. The inner lumen of exhaust pipe 42 communicates with the inner lumen of return pipe 5. The other end of exhaust pipe 42 extends downward to a position below discharge port 12, that is, exhaust pipe 42 extends below the liquid level of fermenter 1. Compressed air is introduced into casing 21 through aeration pipe 9. The air enters the enclosed area between annular baffle 4 and the inner wall of fermenter 1 through return pipe 5, and is then blown into the sewage inside fermenter 1 through exhaust pipe 42. This indirectly aerates the sewage inside fermenter 1 through aeration pipe 9.

[0046] Reference Figure 1The axis of the aeration pipe 9 near one end of the shell 21 is perpendicular to the center line of the helical blade 22, so that the air input by the aeration pipe 9 flows along the tangent of the inner wall of the shell 21, the moving path of the air input by the aeration pipe 9 into the shell 21 is lengthened, and the air input by the aeration pipe 9 into the shell 21 can be more fully contacted with the sludge.

[0047] With reference to Figure 1 The pitch of the helical blade 22 gradually decreases from bottom to top, so that the auger conveying mechanism 2 gradually forms a squeezing effect on the sludge during the conveying of the sludge, so as to reduce the water content of the sludge.

[0048] The surface of the helical blade 22 is provided with a plurality of blocking strips, and the blocking strips are arranged in the helical extension direction of the helical blade 22, so that the blocking strips can increase the stirring effect of the helical blade 22 on the sludge.

[0049] The implementation principle of the microbial carbon source preparation device based on solid waste treatment is that the sludge is poured into the inside of the fermentation tank 1 from the sludge inlet 11, so that the fermentation tank 1 simultaneously contains the sludge and water mixture, the heating piece 3 heats the sludge and water mixture in the fermentation tank 1, the microorganisms in the fermentation tank 1 are caused to reproduce and ferment, the microorganisms decompose the organic matter in the sludge, the slow organic carbon source is decomposed into a fast organic carbon source, and as the amount of sludge added in the fermentation tank 1 increases, the water in the fermentation tank 1 overflows from the discharge port 12.

[0050] During the fermentation in the fermentation tank 1, the auger conveying mechanism 2 conveys the sludge deposited at the bottom of the fermentation tank 1, the auger conveying mechanism 2 gradually inclines upward to lift the sludge, and by switching the first switch valve 51 and the second switch valve 61, the auger conveying mechanism 2 can convey the sludge back to the fermentation tank 1 or discharge the sludge from the sludge discharge pipe 6, when the sludge is backflowed to the fermentation tank 1, the sludge can be subjected to stirring action during the fermentation process, so as to accelerate the fermentation speed, and when the sludge is fermented for a certain period of time, the sludge is discharged from the sludge discharge pipe 6.

[0051] The microbial carbon source preparation device utilizes the residual nutrients in the sludge to culture microorganisms that decompose cellulose, the cultured microorganisms decompose the cellulose in the sludge into fermentation products such as cellobiose and glucose, the fermentation products can be input into the sewage treatment system as carbon sources, are more easily used by denitrifying bacteria for denitrification, and further strengthen the denitrification efficiency.

[0052] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A microbial carbon source preparation device based on solid waste treatment, characterized by: The invention comprises a fermentation tank (1) and an auger conveying mechanism (2), wherein the fermentation tank (1) is provided with a heating element (3), and the heating element (3) is used to heat the material in the fermentation tank (1). The top of the fermentation tank (1) is provided with a mud inlet (11), and the upper part of the fermentation tank (1) is provided with a discharge port (12); the auger conveying mechanism (2) comprises a casing (21), a spiral blade (22) and a driving element (23); the casing (21) is a tubular structure, one end of the casing (21) is connected to the bottom of the fermentation tank (1), the casing (21) gradually extends upward in a direction away from the fermentation tank (1), the driving element (23) is installed at the end of the casing (21) away from the bottom of the fermentation tank (1), and the driving element (23) is used to drive the spiral blade (22) to rotate; a reflux pipe (5) is connected between the upper end of the casing (21) and the upper part of the fermentation tank (1), and the fermentation tank (1) is provided with a reflux pipe (5). (1) is provided with a reflux port (13) for connecting to the reflux pipe (5), and the reflux pipe (5) is provided with a first switch valve (51); the upper end of the housing (21) is connected to a mud discharge pipe (6), the connection portion between the mud discharge pipe (6) and the housing (21) is higher than the discharge port (12), and the mud discharge pipe (6) is provided with a second switch valve (61); an annular partition (4) is provided on the inner side of the fermentation tank (1), and the discharge port (12) is located on the side of the fermentation tank (1) away from the reflux port (13); the annular partition (4) is a cylindrical structure, and the inner wall of the upper part of the fermentation tank (1) is a cylindrical surface. The annular partition (4) is eccentrically arranged between the fermentation tank (1), and the annular partition (4) is biased towards the side close to the discharge port (12) on the inner side of the fermentation tank (1), and a slit is formed between the annular partition (4) and the inner wall of the fermentation tank (1) corresponding to the discharge port (12).

2. The microbial carbon source preparation device based on solid waste treatment according to claim 1, characterized in that: The connection position between the casing (21) and the mud discharge pipe (6) is higher than the connection position between the casing (21) and the return pipe (5).

3. The microbial carbon source preparation device based on solid waste treatment according to claim 1, characterized in that: The reflux port (13) is higher than the discharge port (12), and an inclined guide plate (8) is provided on the inner wall of the fermentation tank (1). The inclined guide plate (8) is located below the port of the reflux pipe (5) connected to the fermentation tank (1), and the inclined guide plate (8) extends downward in a direction away from the inner wall of the fermentation tank (1) to a position lower than the discharge port (12).

4. The device for preparing a microbial carbon source based on solid waste treatment according to claim 1, characterized in that: The mud inlet (11) is located within the surrounding range of the annular partition (4), the center line of the annular partition (4) is arranged vertically, and an annular area (14) is formed between the outer peripheral wall of the annular partition (4) and the inner wall of the fermentation tank (1); the upper edge of the annular partition (4) is higher than the discharge port (12), and the annular partition (4) and the inner wall of the fermentation tank (1) are connected by a plurality of connecting plates (41), and the connecting plates (41) divide the annular area (14) between the annular partition (4) and the fermentation tank (1) into a plurality of different separation areas (141), and the discharge port (12) and the reflux pipe (5) respectively correspond to different separation areas (141).

5. The device for preparing a microbial carbon source based on solid waste treatment according to claim 4, characterized in that: The casing (21) is connected to an aeration pipe (9), and the connection portion between the aeration pipe (9) and the casing (21) is located within the feeding range of the spiral blade (22).

6. The device for preparing a microbial carbon source based on solid waste treatment according to claim 5, characterized in that: The axis of the aeration pipe (9) close to one end of the casing (21) is not perpendicular to the center line of the spiral blade (22).

7. The device for preparing a microbial carbon source based on solid waste treatment according to claim 5, characterized in that: The upper edge of the annular baffle (4) abuts against the top wall of the fermentation tank (1), and the lower edge of the annular baffle (4) is lower than the discharge port (12). The annular baffle (4) is connected to an exhaust pipe (42), the inner cavity of the exhaust pipe (42) is connected to the inner cavity of the reflux pipe (5), and the other end of the exhaust pipe (42) extends downward to a position lower than the discharge port (12).

8. The device for preparing a microbial carbon source based on solid waste treatment according to claim 1, characterized in that: A plurality of baffles are provided on the surface of the spiral blade (22), and the plurality of baffles are arranged at intervals along the spiral extension direction of the spiral blade (22).

9. The device for preparing a microbial carbon source based on solid waste treatment according to claim 1, characterized in that: The pitch of the spiral blade (22) gradually decreases from bottom to top.

Images