Anaerobic fluidized bed reactor for sludge disposal and treatment process thereof

Abstract

The present invention discloses an anaerobic fluidized bed reaction device for sludge treatment, comprising an anaerobic tank, wherein a base is installed at the bottom of the anaerobic tank, and a plurality of equally spaced anchor bolts are installed near the outer ring through the upper and lower ends of the base, a water inlet pipe is installed near the bottom end of a tank body on one side of the anaerobic tank, a sludge discharge and venting pipe is installed through the front end of the water inlet pipe, an air inlet pipe is installed through the tank body on one side of the anaerobic tank and below the water inlet pipe, an inspection port is installed near the bottom end of the tank body on the other side of the anaerobic tank, a water outlet pipe is installed near the top end of the tank body on the other side of the anaerobic tank, and a top cover is installed on the top of the anaerobic tank; the anaerobic fluidized bed reaction device for sludge treatment described in the present invention can form a vortex by utilizing the flow direction of wastewater and the flow direction of aeration to enhance the mixing efficiency of wastewater and gas, and at the same time does not require the components for forming the vortex driven by other power, thereby saving energy consumption.

Description

Technical Field

[0001] The present invention relates to the field of sludge treatment, and in particular to an anaerobic fluidized bed reaction device for sludge treatment and a treatment process thereof. Background Art

[0002] With the widespread adoption of modern wastewater treatment facilities, increased treatment rates, and deepening treatment efforts, the amount of excess sludge generated by wastewater treatment plants has increased significantly annually, leading to increasingly serious problems such as secondary pollution. The essence of biochemical wastewater treatment is to use colloidal and dissolved organic matter in the wastewater as a nutrient source for microorganisms, converting it into carbon dioxide, water, and biomass. Excess biomass constitutes the excess sludge produced by biochemical treatment. Excess sludge is a solid waste containing a large amount of toxic and hazardous substances and unstabilized organic matter. If not properly disposed of, it can cause serious environmental pollution upon discharge. Currently, sludge disposal methods primarily include in-situ treatment and post-situ treatment. In-situ reduction technologies are primarily biological and chemical. Chemical treatment primarily utilizes methods such as ozone, ultrasound, and thermal hydrolysis to oxidize and decompose sludge. While simple to operate, it has limited removal efficiency and is prone to secondary pollution. Biological methods (biofilm and delayed aeration) reduce sludge production by approximately 50% compared to conventional activated sludge processes, but further increasing the reduction rate has proven difficult. Post-treatment technologies primarily include landfilling, natural drying, composting, or incineration. To control the oxygen environment required by microorganisms during the treatment process, sludge is typically treated in an anaerobic fluidized bed reactor. This reactor, also known as an anaerobic reactor, is a highly efficient biofilm treatment method that uses porous fillers as carriers. Anaerobic microorganisms form membranes attached to the carrier surface, flowing through the wastewater. The microorganisms decompose organic matter in the sludge and wastewater. This proposal specifically relates to an anaerobic fluidized bed reactor for sludge disposal and its treatment process.

[0003] However, the existing anaerobic fluidized bed reactor for sludge treatment and its treatment process have certain shortcomings during implementation. First, the water distribution and aeration of the existing anaerobic fluidized bed reactor for sludge treatment are vertically upward, so the gas and wastewater flow in the same direction, which is not convenient for mixing. Even when some anaerobic fluidized bed reactors for sludge treatment use cyclone water distributors for water distribution, other power is also needed to drive the cyclone water distributor to form a vortex, which has high energy consumption. In addition, the aeration pipe is arranged below the cyclone water distributor. During aeration, the aeration flow direction is affected by the obstruction of the cyclone water distributor, resulting in uneven mixing of the gas and wastewater. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides an anaerobic fluidized bed reaction device for sludge disposal.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An anaerobic fluidized bed reaction device for sludge disposal includes an anaerobic tank, a base is installed at the bottom of the anaerobic tank, a plurality of equally spaced anchor bolts are installed near the outer ring through the upper and lower ends of the base, a water inlet pipe is installed near the bottom of one side of the tank body of the anaerobic tank, a sludge discharge pipe is installed through the front end of the water inlet pipe, an air inlet pipe is installed below the water inlet pipe through one side of the tank body of the anaerobic tank, an inspection port is installed near the bottom of the other side of the tank body of the anaerobic tank, and a sludge discharge pipe is installed through the front end of the water inlet pipe. A water outlet pipe is installed near the top of the side tank body, a top seal is installed on the top of the anaerobic tank, a guardrail is installed on the top of the top seal near the outer ring, a straight ladder is installed on the rear end of the anaerobic tank and the guardrail and on the side close to the water outlet pipe, a gas-liquid separator is installed in the center of the top of the top seal, a first riser is installed on one side of the gas-liquid separator, a second riser is installed on the other side of the gas-liquid separator, an exhaust pipe is installed on the top of the gas-liquid separator, and a return pipe is installed at the bottom of the gas-liquid separator;

[0007] An overflow weir is installed at the top of the interior of the anaerobic tank, a cyclone aeration assembly is installed at the bottom of the interior of the anaerobic tank, a water distribution pipe is installed inside the anaerobic tank and above the cyclone aeration assembly, a cyclone mud distribution assembly is installed inside the anaerobic tank and at the top of the water distribution pipe, an aeration pipe group is installed inside the anaerobic tank and above the cyclone mud distribution assembly, a connecting pipe is installed on one side between the aeration pipe group and the cyclone aeration assembly, two support plates are installed inside the anaerobic tank and above the aeration pipe group, wherein a first packing layer is provided on the top of the lower support plate, and a second packing layer is provided on the top of the upper support plate;

[0008] The cyclone aeration assembly comprises a central air pipe, a plurality of cyclone aeration pipes are installed on the side of the central air pipe, and a plurality of aeration oblique openings are opened on the pipe body of the cyclone aeration pipe.

[0009] As a further solution of the present invention, the swirl mud distribution assembly includes a center disk, a plurality of swirl mud distribution plates are installed on the side of the center disk, a connecting shaft is installed on the inner circle of the center disk and passes through the bottom of the center disk, a fixed seat is installed at the bottom of the connecting shaft, and an airflow boosting groove is opened through the bottom surface of the swirl mud distribution plate.

[0010] As a further solution of the present invention, the mud discharge and venting pipes and the water distribution pipes are both connected to the water inlet pipe, the aeration pipe group is connected to the air inlet pipe through a connecting pipe, and the air inlet pipe passes through the central air pipe and is connected to the central air pipe.

[0011] As a further solution of the present invention, a plurality of cyclone aeration pipes are arranged at equal distances outside the central air pipe, and a plurality of aeration bevels on the same cyclone aeration pipe are arranged at equal distances.

[0012] As a further solution of the present invention, the bottom end of the first riser is located between the first packing layer and the second packing layer, the bottom end of the second riser is located above the second packing layer, the bottom end of the return pipe is located between the aeration pipe group and the first packing layer, and the positions of the overflow weir and the outlet pipe correspond to each other.

[0013] As a further solution of the present invention, the swirl mud distribution plate is arranged at an angle, and several swirl mud distribution plates are arranged at equal distances on the outside of the center disk. The center disk and the connecting shaft are movably connected through bearings, the bottom of the connecting shaft is fixedly connected to the top of the fixed seat, and the bottom of the fixed seat is fixedly connected to the top of the water distribution pipe.

[0014] As a further solution of the present invention, the number of the cyclone mud distribution plates is the same as the number of the cyclone aeration tubes, and the inclination angle of the aeration bevel is the same as the inclination angle of the cyclone mud distribution plates.

[0015] A treatment process for sludge disposal using an anaerobic fluidized bed reactor, the treatment process specifically comprising the following steps:

[0016] Step 1: Close the valve on the sludge discharge pipe and open the valve on the water inlet pipe. Connect an external lifting pump to the water inlet pipe to lift the wastewater carrying sludge into the water inlet pipe. The wastewater enters the water distribution pipe through the water inlet pipe and is evenly distributed. After flowing through the swirl mud distribution assembly, it passes through the first packing layer and the second packing layer in sequence.

[0017] Step 2: While distributing water, turn on the external air pump of the air inlet pipe, and the gas enters the central air pipe through the air inlet pipe. Then, part of the gas enters the connecting pipe through the air inlet pipe, and then enters the aeration pipe group through the connecting pipe for aeration. Part of the gas enters the swirl aeration pipe through the central air pipe, and then is ejected through the aeration oblique port. Part of the formed airflow passes through the gap between the two adjacent swirl mud distribution plates and continues to rise to form a swirl, and part of it is sprayed into the airflow boosting groove. After being blocked by the swirl mud distribution plates, the swirl mud distribution plates are pushed to rotate around the center of the central disk, thereby enhancing the formation of swirl on the inner wall of the anaerobic tank. At the same time, the gas entering the aeration pipe group forms a vertical upward airflow, which collides with the sludge in the flow direction formed by the swirl, thereby accelerating the mixing rate of the gas and the wastewater carrying the sludge;

[0018] Step 3: After stopping aeration, since the swirl mud distribution plates are set at an angle, the sludge flowing through the swirl mud distribution plates still forms a swirl after passing through the inclined gaps between the two adjacent swirl mud distribution plates. In the process of the microorganisms in the first packing layer and the second packing layer decomposing the organic matter in the sludge, the generated biogas follows the wastewater carrying the sludge through the first riser and the second riser into the gas-liquid separator on the top of the top cover for gas-liquid separation. The separated biogas enters the external biogas tank for storage through the exhaust pipe, and the sludge flows back to the bottom of the first packing layer through the reflux pipe. The later treated sludge is discharged through the sludge vent pipe, and the treated wastewater flows through the overflow weir and then flows through the outlet pipe to the external sedimentation tank for later process treatment.

[0019] Beneficial effects of the present invention:

[0020] 1. By setting up a swirl mud distribution component, when no aeration is performed, the swirl mud distribution plate is in a static state. The upward flow of wastewater cooperates with two adjacent inclined swirl mud distribution plates to form an inclined gap. When the wastewater flows through the gap, the flow direction is changed to form a swirl, which facilitates the mixing of gas and wastewater, improves the contact efficiency between microorganisms and gas, and enhances the decomposition effect of microorganisms.

[0021] 2. By setting up a swirl aeration component, the gas from the air inlet pipe first enters the central air pipe. After the gas fills the central air pipe, it is evenly dispersed through the swirl aeration pipe, and then the gas is ejected through the aeration oblique port. Since the inclination angle of the aeration oblique port is the same as the inclination angle of the swirl mud distribution plate, the gas evenly dispersed through the swirl aeration pipe also maintains the same inclination angle as the swirl mud distribution plate when ejected. The number of swirl aeration pipes is the same as the number of swirl mud distribution plates. Combined with the airflow booster groove, it is easier to adapt to the swirl mud distribution plate to drive the swirl mud distribution plate to rotate. At the same time, the gas is evenly dispersed through the swirl aeration pipe to avoid uneven force on each swirl mud distribution plate, which causes the swirl mud distribution plate to be affected during rotation.

[0022] 3. By arranging a swirl aeration component in conjunction with a swirl mud distribution component, when aeration is performed through the aeration oblique port on the swirl aeration pipe, if the gas flow rate from the air inlet pipe is low, at this time, part of the generated airflow directly flows through the gap between the two adjacent inclined swirl mud distribution plates to form a swirl, and part of the gas is sprayed to the airflow boosting groove and is blocked by the swirl mud distribution plate, which pushes the swirl mud distribution plate to rotate at a low speed around the center disk, driving the wastewater to accelerate the formation of the swirl. When the gas flow rate from the air inlet pipe is faster, the airflow is sprayed to the airflow boosting groove through the aeration oblique port on the swirl aeration pipe and is blocked by the swirl mud distribution plate. Due to the fast air flow speed, the swirl mud distribution plate is pushed to rotate at a high speed around the center disk, and the swirl speed formed is also faster. At the same time, the aeration pipe group on the upper layer forms vertical upward aeration, which impacts the wastewater in the swirl flow direction, thereby enhancing the mixing effect of gas and wastewater.

[0023] 4. The oblique swirl generated by the swirl aeration component cooperates with the airflow booster groove to drive the swirl mud distribution plate to rotate. There is no need to use other power sources to drive the swirl mud distribution component. The swirl mud distribution component can be pushed to swirl water distribution during aeration, saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of an anaerobic fluidized bed reaction device for sludge disposal according to the present invention.

[0026] Figure 2 This is a front view of the internal structure of an anaerobic tank in an anaerobic fluidized bed reaction device for sludge disposal according to the present invention.

[0027] Figure 3 The present invention provides a top view of a cyclone aeration assembly in an anaerobic fluidized bed reactor for sludge disposal.

[0028] Figure 4 This is a top view of an aeration pipe group in an anaerobic fluidized bed reactor for sludge treatment according to the present invention;

[0029] Figure 5 This is a schematic structural diagram of a cyclone mud distribution component in an anaerobic fluidized bed reactor for sludge disposal according to the present invention;

[0030] Figure 6 This is a front view of a cyclone mud distribution component in an anaerobic fluidized bed reactor for sludge disposal according to the present invention;

[0031] Figure 7 The present invention is an anaerobic fluidized bed reactor for sludge treatment Figure 6 Structural cross-section view at point A.

[0032] In the figure: 1. Anaerobic tank; 2. Anchor bolt; 3. Water inlet pipe; 4. Mud discharge and vent pipe; 5. Air inlet pipe; 6. Inspection port; 7. Water outlet pipe; 8. Top cover; 9. Guardrail; 10. Straight ladder; 11. Gas-liquid separator; 12. Exhaust pipe; 13. First riser pipe; 14. Second riser pipe; 15. Return pipe; 16. Overflow weir; 17. Cyclone aeration assembly; 18. Cyclone mud distribution assembly; 19. Connecting pipe; 20. Aeration pipe group; 21. First packing layer; 22. Second packing layer; 23. Water distribution pipe; 1701. Central air pipe; 1702. Cyclone aeration pipe; 1703. Aeration oblique port; 1801. Central plate; 1802. Cyclone mud distribution plate; 1803. Connecting shaft; 1804. Fixing seat; 1805. Airflow boosting groove. DETAILED DESCRIPTION

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] See also Figure 1-7 As shown, an anaerobic fluidized bed reaction device for sludge treatment includes an anaerobic tank 1, a base is installed at the bottom of the anaerobic tank 1, and a plurality of equally spaced anchor bolts 2 are installed near the outer ring through the upper and lower ends of the base, a water inlet pipe 3 is installed through the bottom end of one side of the tank body of the anaerobic tank 1, a sludge discharge pipe 4 is installed through the front end of the water inlet pipe 3, an air inlet pipe 5 is installed through the tank body of one side of the anaerobic tank 1 and below the water inlet pipe 3, an inspection port 6 is installed through the bottom end of the other side of the tank body of the anaerobic tank 1, and a sludge discharge pipe 4 is installed through the front end of the water inlet pipe 3. A water outlet pipe 7 is installed at the end, a top sealing cover 8 is installed on the top of the anaerobic tank 1, a guardrail 9 is installed on the top of the top sealing cover 8 close to the outer ring, and a straight ladder 10 is installed on the rear end of the anaerobic tank 1 and the guardrail 9 and on the side close to the water outlet pipe 7. A gas-liquid separator 11 is installed in the center of the top of the top sealing cover 8, a first rising pipe 13 is installed on one side of the gas-liquid separator 11, and a second rising pipe 14 is installed on the other side of the gas-liquid separator 11. An exhaust pipe 12 is installed on the top of the gas-liquid separator 11, and a return pipe 15 is installed at the bottom of the gas-liquid separator 11;

[0035] An overflow weir 16 is installed at the top of the interior of the anaerobic tank 1, a cyclone aeration assembly 17 is installed at the bottom of the interior of the anaerobic tank 1, a water distribution pipe 23 is installed inside the anaerobic tank 1 and above the cyclone aeration assembly 17, a cyclone mud distribution assembly 18 is installed inside the anaerobic tank 1 and at the top of the water distribution pipe 23, an aeration pipe group 20 is installed inside the anaerobic tank 1 and above the cyclone mud distribution assembly 18, a connecting pipe 19 is installed on one side between the aeration pipe group 20 and the cyclone aeration assembly 17, and two support plates are installed inside the anaerobic tank 1 and above the aeration pipe group 20, wherein a first packing layer 21 is provided on the top of the lower support plate, and a second packing layer 22 is provided on the top of the upper support plate;

[0036] The cyclone aeration assembly 17 includes a central air pipe 1701 , and a plurality of cyclone aeration pipes 1702 are installed on the side of the central air pipe 1701 . The cyclone aeration pipes 1702 are provided with a plurality of aeration bevels 1703 on their bodies.

[0037] In this scheme, in order to facilitate the formation of a vortex in the carried sludge and wastewater, a vortex mud distribution assembly 18 is set up. The vortex mud distribution assembly 18 includes a central disk 1801, and several vortex mud distribution plates 1802 are installed on the side of the central disk 1801. A connecting shaft 1803 is installed on the inner circle of the central disk 1801 and passes through the bottom of the central disk 1801. A fixed seat 1804 is installed at the bottom of the connecting shaft 1803. An airflow boosting groove 1805 is opened through the bottom surface of the vortex mud distribution plate 1802. The airflow sprayed into the airflow boosting groove 1805 drives the vortex mud distribution plate 1802 to rotate around the center of the central disk 1801 to form a vortex after the airflow is blocked by the vortex mud distribution plate 1802.

[0038] In this solution, in order to facilitate the circulation of wastewater and gas, the sludge discharge pipe 4 and the water distribution pipe 23 are both connected to the water inlet pipe 3, the aeration pipe group 20 is connected to the air inlet pipe 5 through the connecting pipe 19, the air inlet pipe 5 passes through the central air pipe 1701 and is connected to the central air pipe 1701, a water inlet pipe 3 is used to intake water, and a sludge discharge pipe 4 is connected as a branch pipe, which is convenient for water intake and sludge discharge through a main pipe, and an air inlet pipe 5 is used to connect the central air pipe 1701 and the connecting pipe 19, reducing the setting of an external air pump.

[0039] In this solution, in order to avoid uneven aeration, several swirl aeration pipes 1702 are arranged at equal distances on the outside of the central air pipe 1701, and several aeration bevels 1703 on the same swirl aeration pipe 1702 are arranged at equal distances. The use of bevel aeration makes it convenient for the ejected gas to cooperate with the swirl mud distribution plate 1802 to form a swirl.

[0040] In this solution, in order to facilitate the entry of biogas from different layers into the gas-liquid separator 11, the bottom end of the first riser 13 is located between the first packing layer 21 and the second packing layer 22, the bottom end of the second riser 14 is located above the second packing layer 22, the bottom end of the return pipe 15 is located between the aeration pipe group 20 and the first packing layer 21, and the positions of the overflow weir 16 and the outlet pipe 7 correspond to each other. The overflow weir 16 is provided to prevent incompletely treated wastewater from being discharged through the outlet pipe 7. At the same time, the return pipe 15 adopts gravity reflux to reduce energy consumption and cooperate with the first riser 13 and the second riser 14 to form an internal circulation.

[0041] In this solution, in order to drive the wastewater to form a vortex through the rotation of the swirl mud distribution plate 1802, the swirl mud distribution plate 1802 is arranged at an angle, and several swirl mud distribution plates 1802 are arranged at equal distances on the outside of the center disk 1801. The center disk 1801 and the connecting shaft 1803 are movably connected through a bearing. The bottom of the connecting shaft 1803 is fixedly connected to the top of the fixed seat 1804, and the bottom of the fixed seat 1804 is fixedly connected to the top of the water distribution pipe 23. The inclined swirl mud distribution plate 1802 adapts to the aeration flow direction of the aeration oblique port 1703 on the one hand, and flows out of the inclined gap on the other hand. In the case of no aeration, a vortex can still be formed by the upward flowing wastewater and the inclined gap between the two adjacent swirl mud distribution plates 1802.

[0042] In this solution, sufficient impact force is provided to ensure the rotation of the cyclone mud distribution plate 1802. The number of cyclone mud distribution plates 1802 is the same as the number of cyclone aeration tubes 1702. The inclination angle of the aeration bevel 1703 is the same as the inclination angle of the cyclone mud distribution plate 1802. The same inclination angle ensures that aeration does not cause an upward impact force on the cyclone mud distribution plate 1802, thereby avoiding the dispersion of the impact force.

[0043] When the present invention is in use, the device is installed on the ground by means of the anchor bolts 2, the valve on the sludge discharge pipe 4 is closed and the valve on the water inlet pipe 3 is opened, and the water inlet pipe 3 is externally connected to a lifting pump to lift the wastewater carrying sludge into the water inlet pipe 3, and the wastewater enters the water distribution pipe 23 through the water inlet pipe 3 for uniform distribution, flows through the swirl mud distribution assembly 18, and then passes through the first packing layer 21 and the second packing layer 22 in sequence.

[0044] While distributing water, the external air pump of the air inlet pipe 5 is turned on, and the gas enters the central air pipe 1701 through the air inlet pipe 5. Then, part of the gas enters the connecting pipe 19 through the air inlet pipe 5, and then enters the aeration pipe group 20 through the connecting pipe 19 for aeration. Part of the gas enters the swirl aeration pipe 1702 through the central air pipe 1701, and then is ejected through the aeration oblique port 1703. Part of the formed air flow passes through the gap between the two adjacent swirl mud distribution plates 1802 and continues to rise to form a swirl, and part of it is sprayed into the air flow boosting groove 1805. After being blocked by the swirl mud distribution plate 1802, it pushes the swirl mud distribution plate 1802 to rotate around the center of the central disk 1801, thereby enhancing the formation of swirl on the inner wall of the anaerobic tank 1. At the same time, the gas entering the aeration pipe group 20 forms a vertical upward airflow, which collides with the sludge in the flow direction formed by the swirl, thereby accelerating the mixing rate of the gas and the wastewater carrying the sludge.

[0045] After aeration is stopped, since the swirl mud distribution plate 1802 is set at an angle, the sludge flowing through the swirl mud distribution plate 1802 still forms a swirl after passing through the inclined gap between the two adjacent swirl mud distribution plates 1802. In the process of the microorganisms in the first packing layer 21 and the second packing layer 22 decomposing the organic matter in the sludge, the generated biogas follows the wastewater carrying the sludge through the first lifting pipe 13 and the second lifting pipe 14 into the gas-liquid separator 11 on the top of the top cover 8 for gas-liquid separation. The separated biogas enters the external biogas tank for storage through the exhaust pipe 12, and the sludge returns to the bottom of the first packing layer 21 through the reflux pipe 15. The later treated sludge is discharged through the sludge discharge pipe 4, and the treated wastewater flows through the overflow weir 16 and then flows through the outlet pipe 7 to the external sedimentation tank for later process treatment.

[0046] If the components at the bottom of the device are damaged, the user can climb up to the top of the top cover 8 via the straight ladder 10 for maintenance. If the components inside the anaerobic tank 1 are damaged, the user can enter the anaerobic tank 1 through the maintenance port 6 for maintenance.

[0047] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An anaerobic fluidized bed reaction device for sludge disposal, comprising an anaerobic tank (1), wherein a base is installed at the bottom of the anaerobic tank (1), and a plurality of equally spaced anchor bolts (2) are installed through the upper and lower ends of the base and near the outer ring, a water inlet pipe (3) is installed through the bottom end of one side of the tank body of the anaerobic tank (1), a sludge discharge pipe (4) is installed through the front end of the water inlet pipe (3), an air inlet pipe (5) is installed through the tank body of one side of the anaerobic tank (1) and below the water inlet pipe (3), an inspection port (6) is installed through the bottom end of the other side of the tank body of the anaerobic tank (1), and a water outlet pipe (7) is installed through the top end of the other side of the tank body of the anaerobic tank (1). 7), a top cover (8) is installed on the top of the anaerobic tank (1), a guardrail (9) is installed on the top of the top cover (8) close to the outer ring, a straight ladder (10) is installed on the rear end of the anaerobic tank (1) and the guardrail (9) and on the side close to the outlet pipe (7), a gas-liquid separator (11) is installed in the center of the top of the top cover (8), a first rising pipe (13) is installed on one side of the gas-liquid separator (11), a second rising pipe (14) is installed on the other side of the gas-liquid separator (11), an exhaust pipe (12) is installed on the top of the gas-liquid separator (11), and a return pipe (15) is installed on the bottom of the gas-liquid separator (11); An overflow weir (16) is installed at the top end of the interior of the anaerobic tank (1), a cyclone aeration assembly (17) is installed at the bottom end of the interior of the anaerobic tank (1), a water distribution pipe (23) is installed at the interior of the anaerobic tank (1) and above the cyclone aeration assembly (17), a cyclone mud distribution assembly (18) is installed at the top end of the interior of the anaerobic tank (1) and above the cyclone mud distribution assembly (18), an aeration pipe group (20) is installed at the interior of the anaerobic tank (1) and above the cyclone mud distribution assembly (18), a connecting pipe (19) is installed at one side between the aeration pipe group (20) and the cyclone aeration assembly (17), and two supporting plates are installed at the interior of the anaerobic tank (1) and above the aeration pipe group (20), wherein a first packing layer (21) is provided on the top of the lower supporting plate, and a second packing layer (22) is provided on the top of the upper supporting plate; The cyclone aeration assembly (17) comprises a central air pipe (1701), a plurality of cyclone aeration pipes (1702) are installed on the side of the central air pipe (1701), and a plurality of aeration oblique openings (1703) are opened on the pipe body of the cyclone aeration pipe (1702); The swirl mud distribution assembly (18) comprises a central disk (1801), a plurality of swirl mud distribution plates (1802) are installed on the side of the central disk (1801), a connecting shaft (1803) is installed on the inner ring of the central disk (1801) and passes through the bottom of the central disk (1801), a fixing seat (1804) is installed on the bottom of the connecting shaft (1803), and an airflow boosting groove (1805) is opened on the bottom surface of the swirl mud distribution plate (1802); A plurality of cyclone aeration pipes (1702) are arranged at equal distances on the outside of the central air pipe (1701), and a plurality of aeration oblique openings (1703) on the same cyclone aeration pipe (1702) are arranged at equal distances; The bottom end of the first riser (13) is located between the first packing layer (21) and the second packing layer (22), the bottom end of the second riser (14) is located above the second packing layer (22), the bottom end of the return pipe (15) is located between the aeration pipe group (20) and the first packing layer (21), and the overflow weir (16) and the outlet pipe (7) are located in corresponding positions. The swirl mud distribution plate (1802) is arranged at an angle, and a plurality of swirl mud distribution plates (1802) are arranged at equal intervals on the outside of the central disk (1801). The central disk (1801) and the connecting shaft (1803) are movably connected via a bearing. The bottom of the connecting shaft (1803) is fixedly connected to the top of the fixing seat (1804), and the bottom of the fixing seat (1804) is fixedly connected to the top of the water distribution pipe (23). The number of the cyclone mud distribution plates (1802) is the same as the number of the cyclone aeration tubes (1702), and the inclination angle of the aeration bevel (1703) is the same as the inclination angle of the cyclone mud distribution plates (1802).

2. The anaerobic fluidized bed reactor for sludge treatment according to claim 1, characterized in that: The mud discharge and venting pipe (4) and the water distribution pipe (23) are both connected to the water inlet pipe (3), and the aeration pipe group (20) is connected to the air inlet pipe (5) through the connecting pipe (19). The air inlet pipe (5) passes through the central air pipe (1701) and is connected to the central air pipe (1701).

3. A treatment process of an anaerobic fluidized bed reactor for sludge disposal according to any one of claims 1-2, characterized in that: The treatment process specifically includes the following steps: Step 1: Close the valve on the sludge discharge pipe (4) and open the valve on the water inlet pipe (3). The water inlet pipe (3) is connected to an external lifting pump to lift the wastewater carrying sludge into the water inlet pipe (3). The wastewater enters the water distribution pipe (23) through the water inlet pipe (3) and is evenly distributed. After flowing through the swirl mud distribution assembly (18), the wastewater passes through the first packing layer (21) and the second packing layer (22) in sequence. Step 2: While distributing water, open the air inlet pipe (5) and connect it to the external air pump. The air enters the central air pipe (1701) through the air inlet pipe (5). Then, part of the air enters the connecting pipe (19) through the air inlet pipe (5) and then enters the aeration pipe group (20) through the connecting pipe (19) for aeration. Part of the air enters the cyclone aeration pipe (1702) through the central air pipe (1701) and then is ejected through the aeration oblique port (1703). Part of the airflow formed passes through the two adjacent cyclone mud distribution plates ( 1802) and then continue to rise to form a vortex, a part of which is sprayed into the airflow boosting groove (1805), and after being blocked by the vortex mud distribution plate (1802), it pushes the vortex mud distribution plate (1802) to rotate around the center of the central disk (1801), thereby enhancing the formation of the vortex on the inner wall of the anaerobic tank (1). At the same time, the gas entering the aeration pipe group (20) forms a vertical upward airflow, and after colliding with the sludge in the upward flow formed by the vortex, the mixing rate of the gas and the wastewater carrying the sludge is accelerated; Step 3: After stopping aeration, since the sludge distribution plate (1802) is set at an angle, the sludge flowing through the sludge distribution plate (1802) still forms a swirl after passing through the inclined gap between the two adjacent sludge distribution plates (1802). In the process of the microorganisms in the first packing layer (21) and the second packing layer (22) decomposing the organic matter in the sludge, the generated biogas follows the wastewater carrying the sludge through the first lifting pipe (13) and the second lifting pipe (14) into the gas-liquid separator (11) on the top of the top cover (8) for gas-liquid separation. The separated biogas enters the external biogas tank for storage through the exhaust pipe (12), and the sludge returns to the bottom of the first packing layer (21) through the return pipe (15). The sludge that has been treated later is discharged through the sludge discharge pipe (4). The treated wastewater flows through the overflow weir (16) and then flows through the outlet pipe (7) to the external sedimentation tank for later process treatment.

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