UIC anaerobic reactor

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a UIC anaerobic reactor. Comprising a reactor tank body, a stirring mechanism is arranged at the bottom of the reactor tank body, the stirring mechanism comprises a rotating cylinder, a cross-shaped sliding groove is formed in the rotating cylinder, a cross-shaped sliding rod is arranged in the cross-shaped sliding groove in a sliding mode, and a plurality of stirring rods are annularly distributed and fixed to the upper end of the cross-shaped sliding rod; a driving assembly is arranged at the bottom of the reactor tank body, and a jacking assembly is arranged at the bottom of the cross-shaped sliding rod. According to the utility model, in the use process of the anaerobic reactor, the rotating drum is driven by the driving assembly to rotate, the rotating drum drives the cross-shaped sliding rod and the stirring rod to rotate and stir sludge, and meanwhile, the rotating stirring rod is jacked up by the jacking assembly; the stirring rod pushes the sludge on the bottom layer to rise to the top layer in the moving process and enables the sludge on the inner edge of the reactor to get close to the middle part, so that the sludge and sewage in the reactor are mixed, and anaerobic bacteria can conveniently decompose organic matters.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to a UIC anaerobic reactor. Background Technology

[0002] The UIC anaerobic reactor is a highly efficient multi-stage internal circulation reactor, mainly composed of a sludge reaction zone, a gas-liquid-solid three-phase separator, and a gas chamber, etc., to achieve a highly efficient anaerobic digestion process. During operation, the wastewater to be treated flows in from the bottom of the anaerobic sludge bed, mixing and contacting with the sludge in the sludge layer. Under anaerobic conditions, the organic matter in the wastewater is decomposed by microorganisms in the sludge, producing biogas. The biogas is effectively separated from the sludge bed by the gas-liquid-solid three-phase separator. In existing UIC anaerobic reactors, sludge settles at the bottom of the reactor tank where anaerobic bacteria decompose the organic matter. However, after sedimentation, nutrients and mass transfer in the sludge also settle together, leading to limited nutrient and mass transfer in the bottom sludge. This makes it difficult for anaerobic bacteria to decompose the organic matter in the bottom sludge, resulting in the presence of pollutants in the bottom sludge. The decomposition rate of organic matter decreases, thus affecting the treatment efficiency of anaerobic bacteria in wastewater. To improve the decomposition of organic matter in the bottom sludge by anaerobic bacteria, a stirring mechanism is usually installed inside the reactor to periodically stir the settled sludge. Because the sludge is settled together, the stirring time of the stirring mechanism should not be too long to ensure sufficient catalytic time for the anaerobic bacteria. This will result in the sludge at the edge of the reactor not being completely stirred. At the same time, because the stirring time of the stirring mechanism is too short, the sludge settled at the bottom of the reactor will not be easily stirred up. Repeated sedimentation of sludge in the reactor will cause the sludge inside the reactor that has not been stirred to gradually settle and harden, making it difficult for anaerobic bacteria to decompose the organic matter in this sludge. In view of this, we propose a UIC anaerobic reactor. Summary of the Invention

[0003] The purpose of this invention is to provide a UIC anaerobic reactor to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, one objective of this utility model is to provide a UIC anaerobic reactor, including a reactor tank. An inlet pipe is fixedly installed on one side of the reactor tank near the bottom, for injecting wastewater into the reactor tank. A stirring mechanism is installed at the bottom of the reactor tank for scraping and stirring the sludge inside the reactor tank. A rotating hole penetrating the bottom of the reactor tank is opened near the middle of the bottom. The stirring mechanism includes a rotating cylinder rotatably disposed inside the rotating hole. A cross-shaped groove penetrating the top and bottom of the rotating cylinder is opened inside the rotating cylinder along its axial direction. A cross slide bar is slidably installed inside the rotating drum along its axis. The upper end of the cross slide bar extends into the interior of the reactor tank and is fixed with several stirring rods arranged in a ring. The upper side of each stirring rod is inclined, and the lower side is flat. The end of each stirring rod away from the cross slide bar is bent. A drive assembly is installed at the bottom of the reactor tank to drive the rotating drum to rotate. The rotating drum drives the stirring rods to rotate and stir the settled sludge. When the stirring rods rotate slowly, they crush the settled sludge into large pieces. When the stirring rods rotate rapidly, they mix the sludge with wastewater. A lifting assembly is installed at the bottom of the cross slide bar to drive the stirring rods to move up and down.

[0005] As a further improvement to this technical solution, the lower end of the rotating drum extends to the bottom of the reactor tank. The driving assembly includes a first gear coaxially fixed on the rotating drum. A motor is fixed to the bottom of the reactor tank by a mounting bracket. A second gear is coaxially fixed to the output shaft of the motor. The second gear meshes with the first gear. The motor drives the first gear to rotate by driving the second gear.

[0006] As a further improvement to this technical solution, a support frame is fixedly installed at the bottom of the reactor tank. The lifting assembly includes an electric telescopic rod fixedly installed on the support frame. The lower end of the cross slide rod extends through the cross slide groove to the bottom of the rotating drum. The lower end of the cross slide rod is rotatably installed at the top of the piston end of the electric telescopic rod through a bearing. When the piston end of the electric telescopic rod extends or retracts, it drives the cross slide rod to move up and down.

[0007] As a further improvement to this technical solution, the reactor tank is provided with a second partition and a first partition fixedly arranged from top to bottom inside the tank. The second partition and the first partition divide the reactor tank into a gas-liquid separation chamber, a second anaerobic chamber and a first anaerobic chamber from top to bottom. The bottom of the first anaerobic chamber is used to mix sludge and sewage. A second connecting pipe is fixedly arranged on the first partition, which connects the second anaerobic chamber and the first anaerobic chamber. A first connecting pipe is fixedly arranged on the second partition, which connects the gas-liquid separation chamber and the second anaerobic chamber.

[0008] As a further improvement to this technical solution, an external circulation pipe is provided on one side of the reactor tank. The two ends of the external circulation pipe penetrate the side wall of the reactor tank and extend to the bottom of the second anaerobic chamber and the top of the first anaerobic chamber, respectively. The external circulation pipe is used to flow the liquid inside the second anaerobic chamber into the first anaerobic chamber. An exhaust pipe is fixedly provided at the top of the reactor tank. A gas permeation membrane is fixedly provided near the top of the gas-liquid separation chamber. An outlet pipe is installed at the bottom of the gas-liquid separation chamber of the reactor tank.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. This UIC anaerobic reactor uses a drive assembly to rotate a rotating drum. The rotating drum, in turn, drives a cross slide bar and a stirring rod. The stirring rod first rotates slowly, scraping away the sludge settled at the bottom of the reactor tank. Then, a lifting assembly lifts the rotating stirring rod, pushing the bottom sludge upwards and separating it from the bottom of the reactor tank. This makes the sludge movable. The rising stirring rod then rotates rapidly, creating a vortex within the reactor tank. This vortex mixes the scraped sludge, ensuring thorough mixing of the sludge and wastewater inside the reactor tank. This facilitates the subsequent decomposition of organic matter in the sludge by anaerobic bacteria, improving the efficiency of anaerobic bacteria in treating wastewater. Attached Figure Description

[0011] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0012] Figure 2 This is one of the overall structural schematic diagrams of this utility model;

[0013] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model;

[0014] Figure 4 This is a three-dimensional structural diagram of the stirring mechanism in this utility model;

[0015] Figure 5 This is an exploded three-dimensional view of the stirring mechanism in this utility model.

[0016] The meanings of the labels in the diagram are as follows:

[0017] 1. Reactor tank; 11. Support frame; 12. First baffle; 13. Second baffle; 14. First connecting pipe; 15. Second connecting pipe; 16. External circulation pipe;

[0018] 2. Stirring mechanism; 21. Rotary drum; 22. Cross slide groove; 23. Cross slide bar; 24. Stirring rod; 25. Electric telescopic rod; 26. First gear; 27. Motor; 28. Second gear. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0020] Please see Figure 1 - Figure 5As shown, the purpose of this embodiment is to provide a UIC anaerobic reactor, including a reactor tank 1. A support frame 11 is fixedly installed at the bottom of the reactor tank 1 to support the reactor tank 1 and increase the stability of the reactor tank 1 during use. An inlet pipe is fixedly installed on one side of the reactor tank 1 near the bottom, and one end of the inlet pipe extends into the reactor tank 1 near the bottom. At the same time, an outlet pipe (not shown in the figure) is installed on the side wall of the reactor tank 1 near the bottom. A sealing valve is installed on the reactor tank 1. The outlet pipe is used to discharge the reacted substances from the reactor tank 1, and the inlet pipe is used to fill the reactor tank 1 with wastewater. The reactor tank 1 is internally divided into a gas-liquid separation chamber, a second anaerobic chamber, and a first anaerobic chamber. The bottom of the first anaerobic chamber is used to mix sludge and wastewater. A second connecting pipe 15 is fixedly installed on the first partition 12, connecting the second anaerobic chamber and the first anaerobic chamber. The first anaerobic chamber is connected to the second anaerobic chamber. Both ends of the second connecting pipe 15 extend into the first and second anaerobic chambers near the top, respectively. A first connecting pipe 14 is fixedly installed on the second partition 13, connecting the gas-liquid separation chamber and the second anaerobic chamber. Both ends of the first connecting pipe 14 extend into the second anaerobic chamber and the gas-liquid separation chamber near the top, respectively. The first connecting pipe 14 and the second connecting pipe 15 are staggered. Wastewater is injected into the first anaerobic chamber through the inlet pipe and mixed with sludge. Anaerobic bacteria inside the first anaerobic chamber decompose the organic matter in the sludge and... Wastewater treatment produces biogas. The biogas inside the first anaerobic chamber enters the second anaerobic chamber through the second connecting pipe 15 for secondary treatment. Because the biogas carries some water when it enters the second anaerobic chamber, and the water still contains nutrients, anaerobic bacteria are used to further treat the biogas entering the second anaerobic chamber during the secondary treatment. By staggering the first connecting pipe 14 and the second connecting pipe 15, the time the biogas spends in the second anaerobic chamber is extended, improving the effect of anaerobic bacteria in removing nutrients from the biogas. The biogas after secondary treatment enters the gas-water separation chamber through the first connecting pipe 14.

[0021] An external circulation pipe 16 is installed on one side of the reactor tank 1. Both ends of the external circulation pipe 16 penetrate the side wall of the reactor tank 1 and extend to the bottom of the second anaerobic chamber and the top of the first anaerobic chamber, respectively. The external circulation pipe 16 is used to allow liquid from the second anaerobic chamber to flow into the first anaerobic chamber. The connection point between the external circulation pipe 16 and the reactor tank 1 is lower than the bottom of the second connecting pipe 15, thus ensuring that biogas enters the second anaerobic chamber through the second connecting pipe 15. Simultaneously, an extraction pipe is fixedly installed at the top of the reactor tank 1, near the top of the gas-liquid separation chamber. A gas permeation membrane is fixedly installed in the reactor tank 1. The gas permeation membrane can block water through biogas. A water outlet pipe is installed at the bottom of the gas-water separation chamber. The wastewater generated by biogas treatment in the second anaerobic chamber flows into the first anaerobic chamber for circulation treatment through the external circulation pipe 16. After the biogas treatment is completed, the gas extraction pipe is connected to an external air pump. The air pump extracts the air from the gas-water separation chamber through the gas extraction pipe. At the same time, the gas permeation membrane in the gas-water separation chamber separates water and gas. The water separated by the gas permeation membrane falls into the gas-water separation chamber and is discharged through the water outlet pipe.

[0022] During operation, the device involves repeated steps of settling reaction and sludge mixing. If the sludge cannot be fully mixed during the mixing process inside reactor tank 1, the undisturbed sludge will gradually settle and harden, making it difficult for anaerobic bacteria to decompose the organic matter in this sludge. To improve the decomposition efficiency of anaerobic bacteria on the bottom sludge, a stirring mechanism 2 is installed at the bottom of reactor tank 1. The improvement of the stirring mechanism 2 in this design is that it scrapes and stirs the sludge inside reactor tank 1. A rotating hole penetrating the bottom of reactor tank 1 is opened near the middle of the bottom of reactor tank 1. The stirring mechanism 2 includes a rotating... A rotating cylinder 21 is dynamically installed inside the rotating hole. A first sealing ring is fixedly installed on the inner wall of the rotating hole near the top. The inner wall of the first sealing ring is in close contact with the side wall of the rotating cylinder 21. The first sealing ring seals the gap between the rotating hole and the rotating cylinder 21, improving the sealing effect of the reactor tank 1 and preventing objects inside the reactor tank 1 from entering the gap between the rotating cylinder 21 and the rotating hole and affecting the normal rotation of the rotating cylinder 21. At the same time, a cross groove 22 is opened inside the rotating cylinder 21 along the axial direction of the rotating cylinder 21, penetrating the top and bottom of the rotating cylinder 21. A cross slide rod 23 is slidably installed inside the cross groove 22 along the axial direction of the rotating cylinder 21. A second sealing ring is fixedly installed on the inner wall near the top. The inner wall of the second sealing ring is in close contact with the side wall of the cross slide rod 23. The second sealing ring seals the gap between the cross slide groove 22 and the cross slide rod 23. During the movement of the cross slide rod 23, the sliding friction between the second sealing ring and the side wall of the cross slide rod 23 achieves the sealing effect between the cross slide rod 23 and the cross slide groove 22, preventing the material in the reactor tank 1 from flowing out of the reactor tank 1 through the gap between the cross slide rod 23 and the cross slide groove 22. The operator regularly checks the first and second sealing rings during the rotation of the drum 21 and the raising and lowering of the cross slide rod 23. To prevent deformation of the first and second sealing rings that could cause the rotating drum 21 and cross slide bar 23 to malfunction, the upper end of the cross slide bar 23 extends into the interior of the reactor tank 1 and is fixed with several stirring rods 24 arranged in a ring. One end of the stirring rod 24 extends to the edge of the reactor tank 1. The upper side of the stirring rod 24 is inclined and the lower side is flat. The end of the stirring rod 24 away from the cross slide bar 23 is bent. By bending the end of the stirring rod 24 away from the cross slide bar 23, the water flow can be guided to flow towards the edge of the reactor tank 1 when the stirring rod 24 is stirring rapidly. The contact water flow mixes and washes away the sludge at the edge of the reactor tank 1.

[0023] Meanwhile, a drive assembly is installed at the bottom of the reactor tank 1. The drive assembly drives the rotating drum 21 to rotate. The rotating drum 21 drives the stirring rod 24 to rotate and stir the settled sludge. When the stirring rod 24 rotates slowly, it crushes the settled sludge into large pieces of sludge. When the stirring rod 24 rotates rapidly, it mixes the sludge with the wastewater. A lifting assembly is installed at the bottom of the cross slide bar 23. The lifting assembly drives the stirring rod 24 to move up and down. The drive assembly drives the rotating drum 21 to rotate inside the rotating hole. The rotating drum 21 drives the cross slide bar 23 and the stirring rod 24 to rotate slowly, crushing the settled sludge into large pieces of sludge. As the stirring rod 24 rotates faster, it crushes large pieces of sludge inside the reactor tank 1 and mixes them with the wastewater. During the rotation of the stirring rod 24, the sludge moves upward along the inclined surface under the guidance of the stirring rod 24 and is pushed towards the edge, thereby fully mixing the sludge and wastewater. At the same time, the lifting assembly drives the cross slide bar 23 and the stirring rod 24 to rise, pushing the sludge at the bottom of the first anaerobic chamber to the top and causing the sludge at the top to flow downward through the edge, causing the sludge inside the reactor tank 1 to turn over. This facilitates the decomposition of organic matter originally in the bottom sludge by anaerobic bacteria and improves the decomposition efficiency of organic matter by anaerobic bacteria.

[0024] The lower end of the rotating drum 21 extends to the bottom of the reactor tank 1. The drive assembly includes a first gear 26 coaxially fixed on the rotating drum 21. The first gear 26 is located below the reactor tank 1. A motor 27 is fixed to the bottom of the reactor tank 1 by a mounting bracket. A second gear 28 is coaxially fixed to the output shaft of the motor 27. The second gear 28 meshes with the first gear 26. The motor 27 drives the first gear 26 to rotate by driving the second gear 28. During the rotation, the first gear 26 drives the rotating drum 21 to rotate.

[0025] The lifting assembly includes an electric telescopic rod 25 fixedly mounted on the support frame 11. The lower end of the cross slide rod 23 extends through the cross slide groove 22 to the bottom of the rotating drum 21. The lower end of the cross slide rod 23 is rotatably mounted on the top of the piston end of the electric telescopic rod 25 via a bearing. When the piston end of the electric telescopic rod 25 extends and retracts, it drives the cross slide rod 23 to move up and down. During the movement, the cross slide rod 23 drives the stirring rod 24 to rise and push the sludge to move. When the stirring rod 24 is at its lowest position, its bottom slides in contact with the bottom side wall of the reactor tank 1, which makes it convenient for the stirring rod 24 to scrape up the sludge.

[0026] In summary, the workflow of this solution is as follows:

[0027] Feeding: Workers pump sewage into the first anaerobic chamber through the inlet pipe, so that the sewage and sludge are decomposed by microorganisms in the first anaerobic chamber to produce biogas, and the sludge in the sewage settles in the first anaerobic chamber.

[0028] Mixing: When it is necessary to stir the settled sludge, the drive component first drives the stirring rod 24 to rotate slowly. The slowly rotating stirring rod 24 slowly scrapes up the settled sludge. The scraped sludge is guided upward by the inclined surface of the stirring rod 24, and then falls down from the stirring rod 24 under the action of gravity. This causes the sludge settled at the bottom of the reactor tank 1 to be scraped, stirred and crushed by the stirring rod 24, so that the sludge settled together is stirred into several small sludge lumps. The rotation speed of the stirring rod 24 at the bottom of the reactor tank 1 gradually increases, gradually stirring the sludge settled at the bottom of the reactor tank 1 into small particles. The sludge is mixed with the sewage during the rotation of the stirring rod 24. At the same time, the stirring rod 24 guides the water flow to the edge of the reactor tank 1, so that the sewage impacts the edge of the reactor tank 1 and removes the sludge at the edge of the reactor tank 1. This avoids the accumulation of sludge at the edge of the reactor tank 1. Then, the lifting component drives the stirring rod 24 to rise, and the stirring rod 24 continuously stirs the sewage and sludge during the rise, improving the mixing effect of sewage and sludge, making it easier for anaerobic bacteria to decompose the organic matter that was originally in the bottom sludge, and improving the decomposition efficiency of anaerobic bacteria on organic matter.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A UIC anaerobic reactor, comprising a reactor tank (1), wherein an inlet pipe is fixedly installed on one side of the reactor tank (1) near the bottom, the inlet pipe being used to inject wastewater into the interior of the reactor tank (1), characterized in that: A stirring mechanism (2) is provided at the bottom of the reactor tank (1). The stirring mechanism (2) is used to scrape and stir the sludge inside the reactor tank (1). A rotating hole is provided at the bottom of the reactor tank (1) near the middle. The stirring mechanism (2) includes a rotating cylinder (21) rotatably disposed inside the rotating hole. A cross groove (22) is provided inside the rotating cylinder (21) along the axial direction of the rotating cylinder (21) and passes through the top and bottom of the rotating cylinder (21). A cross slide rod (23) is slidably disposed inside the cross groove (22) along the axial direction of the rotating cylinder (21). The upper end of the cross slide rod (23) extends to the reactor tank (1). Inside the reactor tank (1), several stirring rods (24) are arranged in a ring and fixed. The upper side of the stirring rod (24) is inclined and the lower side is flat. The end of the stirring rod (24) away from the cross slide bar (23) is bent. A driving component is provided at the bottom of the reactor tank (1). The driving component is used to drive the rotating drum (21) to rotate. The rotating drum (21) drives the stirring rod (24) to rotate and stir the settled sludge. When the stirring rod (24) rotates slowly, it crushes the settled sludge into large pieces of sludge. When the stirring rod (24) rotates quickly, it mixes the sludge with the sewage. A lifting component is provided at the bottom of the cross slide bar (23). The lifting component is used to drive the stirring rod (24) to move up and down.

2. The UIC anaerobic reactor according to claim 1, characterized in that: The lower end of the rotating drum (21) extends to the bottom of the reactor tank (1). The driving assembly includes a first gear (26) coaxially fixed on the rotating drum (21). A motor (27) is fixed to the bottom of the reactor tank (1) by a mounting bracket. A second gear (28) is coaxially fixed to the output shaft of the motor (27). The second gear (28) meshes with the first gear (26). The motor (27) drives the first gear (26) to rotate by driving the second gear (28).

3. The UIC anaerobic reactor according to claim 1, characterized in that: The bottom of the reactor tank (1) is fixedly provided with a support frame (11). The lifting assembly includes an electric telescopic rod (25) fixedly provided on the support frame (11). The lower end of the cross slide rod (23) passes through the cross slide groove (22) and extends to the bottom of the rotating drum (21). The lower end of the cross slide rod (23) is rotatably provided on the top of the piston end of the electric telescopic rod (25) through a bearing. When the piston end of the electric telescopic rod (25) extends and retracts, it drives the cross slide rod (23) to move up and down.

4. The UIC anaerobic reactor according to claim 1, characterized in that: The reactor tank (1) is provided with a second partition (13) and a first partition (12) fixedly arranged from top to bottom inside. The second partition (13) and the first partition (12) divide the reactor tank (1) into a gas-water separation chamber, a second anaerobic chamber and a first anaerobic chamber from top to bottom. The bottom of the first anaerobic chamber is used to mix sludge and sewage. A second connecting pipe (15) is fixedly arranged on the first partition (12). The second connecting pipe (15) connects the second anaerobic chamber and the first anaerobic chamber. A first connecting pipe (14) is fixedly arranged on the second partition (13). The first connecting pipe (14) connects the gas-water separation chamber and the second anaerobic chamber.

5. The UIC anaerobic reactor according to claim 4, characterized in that: An external circulation pipe (16) is provided on one side of the reactor tank (1). The two ends of the external circulation pipe (16) extend to the bottom of the second anaerobic chamber and the top of the first anaerobic chamber, respectively. The external circulation pipe (16) is used to flow the liquid inside the second anaerobic chamber into the first anaerobic chamber. An air extraction pipe is fixedly provided at the top of the reactor tank (1). A gas permeation membrane is fixedly provided at the top of the gas-water separation chamber. A water outlet pipe is installed at the bottom of the gas-water separation chamber of the reactor tank (1).

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