Anaerobic ammonia oxidation reactor based on gas internal circulation

Abstract

The anaerobic ammonia oxidation reactor based on gas internal circulation comprises a tank body, and a water inlet pipe is connected to the surface of the side, close to the top, of the tank body in a penetrating mode; an aeration device is arranged in the tank body, a water outlet pipe is connected to the surface of the other side, close to the top, of the tank body in a penetrating mode, a circulating water pump is fixedly connected to the surface of the side, away from the tank body, of the water outlet pipe, a fixing frame is connected to the surface of the circulating water pump in a penetrating mode, and the surface of one side of the fixing frame is fixedly connected with the tank body; through the arrangement of the purification device, the purification device is installed at the tail end of the air outlet pipe through the cooperation between a threaded insertion rod and an anti-falling nut on the purification device, and meanwhile through the cooperation between the aeration device, the water outlet pipe, the circulating water pump, the fixing frame, the conveying pipe, the air outlet pipe and the filler module, the purification device is more efficient. The mixing effect and mass transfer efficiency of microorganisms and wastewater are improved, the ammonia nitrogen removal capacity is enhanced, and efficient and stable wastewater treatment is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, in particular to an anaerobic ammonium oxidation reactor based on internal gas circulation. Background Art

[0002] As an efficient and energy-saving biological denitrification technology, the anaerobic ammonium oxidation process has significant advantages in treating ammonia-nitrogen-containing wastewater. However, traditional anaerobic ammonium oxidation reactors in the existing technology have many problems. In terms of tank structure, multi-stage water tanks are used to meet the biochemical process of anaerobic ammonium oxidation microorganisms. The anaerobic ammonium oxidation reaction is divided into two major processes. First, nitrogen-containing organic matter is oxidized into nitrite, and then nitrite and ammonium ions are directly converted into nitrogen gas under the action of ammonia-oxidizing bacteria. A small amount of oxygen is required to participate in the reaction in the first process. The use of multiple sets of water tank structures will increase environmental protection investment and the land occupied by enterprises for environmental protection will also be limited. Too many water tank designs will also lead to excessive head loss and waste of short-circuit space in the pool. At the same time, the mixing effect of microorganisms and wastewater in traditional reactors is poor, and the mass transfer efficiency is low, which affects the removal efficiency of ammonia nitrogen by anaerobic ammonium oxidation bacteria, making the treatment effect unstable and difficult to meet increasingly stringent environmental protection requirements. At the same time, when the sewage is treated with anoxic conditions, in addition to nitrogen, other gases such as methane, hydrogen sulfide, ammonia and other harmful components may also be produced. If these gases are discharged directly, they will cause harm to the environment and human health. This requires that these gases be purified before they can be discharged. Currently, gas purification devices are mainly installed at the middle or end of the outlet pipe. However, when the purification device is used for a long time, it is necessary to disassemble and replace the purification device. In the existing technology, the installation of the purification device generally adopts the bolt connection method, which easily causes excessive stress when the purification device is installed, thereby causing the purification device to be easily damaged.

[0003] An anaerobic ammonium oxidation reactor based on gas internal circulation is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide an anaerobic ammonia oxidation reactor based on gas internal circulation to solve the problem raised in the above background technology that the current gas purification device is mainly set at the middle or end of the outlet pipe, but the purification device needs to be disassembled and replaced when used for a long time. In the prior art, the installation of the purification device generally adopts the bolt connection method, which easily causes excessive stress when installing the purification device, thereby causing the purification device to be easily damaged.

[0005] To achieve the above object, the present invention provides the following technical solution: an anaerobic ammonium oxidation reactor based on internal gas circulation, comprising a tank body, wherein a water inlet pipe is connected through a surface of one side of the tank body near the top;

[0006] An aeration device is provided inside the tank body, a water outlet pipe is connected through the other side surface of the tank body near the top, a circulating water pump is fixedly connected to the side surface of the water outlet pipe away from the tank body, a fixing bracket is connected through the surface of the circulating water pump, one side surface of the fixing bracket is fixedly connected to the tank body, a delivery pipe is fixedly connected to the side surface of the circulating water pump near the bottom, the delivery pipe is connected through the side surface away from the circulating water pump, and an air outlet pipe is connected through the side surface of the tank body near the middle;

[0007] Also includes:

[0008] A purification component is provided inside the air outlet pipe;

[0009] Wherein, the purification component includes a filter element which is slidably connected to the air outlet pipe;

[0010] Wherein, the surface of one side of the filter element close to the air outlet pipe is symmetrically provided with engaging grooves.

[0011] Preferably, a connecting plate is fixedly connected to the surface of the filter away from the air outlet pipe, threaded rods are connected through both sides of the surface of the connecting plate, and an anti-slip nut is threadedly connected to the surface of one side of the threaded rod.

[0012] Preferably, one side surface of the anti-drop nut is fitted and connected to the connecting plate, and one side surface of the connecting plate close to the filter element is fitted and connected to the air outlet pipe.

[0013] Preferably, a plurality of support frames are connected through one side of the surface of the aeration device close to the bottom, and the bottom surface of the support frame is fixedly connected to the tank body.

[0014] Preferably, a plurality of filler modules are fixedly installed inside the tank body.

[0015] Preferably, a block is symmetrically installed inside the air outlet pipe, a locking block is fixedly connected to the middle of one side surface of the block, the locking block is locked in connection with the locking groove, and a threaded groove is symmetrically opened on the side surface of the air outlet pipe away from the tank body, and the threaded groove is threadedly connected to the threaded rod.

[0016] Preferably, a drainage pipe is connected through one side surface of the tank body close to the bottom.

[0017] Preferably, the locking block and the locking groove adopt a stepped wedge-tightening structure: a 15°-30° guide slope is provided at the front end of the locking block, and a rectangular limiting section is provided at the rear end. A stepped groove is provided corresponding to the locking groove, and the fitting clearance between the guide slope and the groove wall is ≤0.1mm. The rectangular section forms an interference fit with the bottom of the groove. The block is an L-shaped plate structure, the vertical section of which is welded to the inner wall of the air outlet pipe, and a guide hole is provided in the horizontal section. The guide hole forms an angle of 20-40° with the axis of the air outlet pipe, forming a spiral airflow guide structure.

[0018] Preferably, the filler module adopts a three-layer composite structure: the inner layer is a porous ceramic skeleton, the middle layer is a polypropylene fiber mesh, and the outer layer is a polyurethane elastomer. Radial grooves are provided on the surface. The edge of the filler module is provided with a convex tenon structure, which is interference fit with the concave tenon groove on the inner wall of the tank body, and the tenon groove contact surface is coated with silicone sealant.

[0019] Preferably, the gas distribution pipe of the aeration device adopts a variable diameter design: the main pipe and the branch pipe are connected by a tapered tee with a taper of 1:4, and the microporous aeration heads at the end of the branch pipe are arranged in a plum blossom shape, and the service area of ​​a single aeration head is ≤0.2m 2 The support frame is a hollow tubular truss structure, the top of which is clamped to the aeration device through a U-shaped clamp, and the bottom is bolted to the tank bottom plate through a flange, and a rubber gasket is set between the flange and the bottom plate.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the anaerobic ammonia oxidation reactor based on gas internal circulation is provided with a purification device, so that the purification device can be installed at the end of the outlet pipe through the cooperation between the threaded plug rod and the anti-slip nut on the purification device. At the same time, by providing the cooperation between the aeration device, the outlet pipe, the circulating water pump, the fixing frame, the delivery pipe, the outlet pipe and the filler module, the mixing effect and mass transfer efficiency of the microorganisms and the wastewater are improved, the removal capacity of ammonia nitrogen is enhanced, and efficient and stable wastewater treatment is achieved. The specific contents are as follows:

[0021] 1. By setting up a purification device, when the filter element needs to be replaced, the anti-slip nut is separated from the threaded rod by using a tool device, and then the threaded rod is rotated to separate the threaded rod from the thread groove. After the threaded rod is completely separated from the thread groove, the connecting plate is pulled to make the connecting plate drive the filter element to move, so that the clamping groove on the filter element is separated from the clamping block, so that the filter element can be removed and replaced. When installing the filter element, the filter element is placed inside the air outlet pipe so that the clamping groove on the filter element is aligned with the clamping block, and then the connecting plate is pushed to make the connecting plate drive the filter element to move, so that the clamping groove on the filter element is clamped together with the clamping block, and then the threaded rod is screwed into the inside of the thread groove, and the anti-slip nut is threadedly connected to the threaded rod, thereby completing the installation of the purification device, which can reduce the stress on the filter element to a certain extent, thereby reducing the risk of damage to the filter element during installation.

[0022] 2. By setting up an aeration device, an outlet pipe, a circulating water pump, a fixing frame, a delivery pipe, an outlet pipe and a packing module, a modular packing structure is first set up in each layer of the reaction channel. The packing module is made of porous polymer material and has a rich pore structure inside, which provides a large amount of attachment and growth space for anaerobic ammonia-oxidizing bacteria. At the same time, the pore structure of the packing is conducive to the flow and diffusion of wastewater inside the packing, further increasing the contact area between microorganisms and wastewater, and enhancing the removal effect of ammonia nitrogen. At the same time, the reactor is equipped with an intelligent control system, which includes a variety of monitoring equipment such as pH sensors and DO sensors to monitor various operating parameters in the reactor in real time. According to the monitoring data, the intelligent control system can automatically adjust the aeration volume, water inlet flow rate and other parameters of the aeration device to maintain the optimal operating conditions in the reactor. The setting of the intelligent control system realizes the automatic operation of the reactor, reduces manual intervention and reduces labor costs. At the same time, the tank body is a three-dimensional circular reaction structure, which makes full use of the space and changes the plane layout mode of the traditional reactor. The reactor occupies a significantly reduced area under the same treatment scale, which is particularly suitable for areas with tight land resources and reduces land use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0025] Figure 3 For the present invention Figure 1 Schematic diagram of the enlarged structure of area A in the middle;

[0026] Figure 4Schematic diagram of the cross-sectional structure of the air outlet pipe in the present invention;

[0027] Figure 5 This is a schematic diagram of the overall explosion structure of the purification component in the present invention;

[0028] Figure 6 It is a schematic side view of the overall structure of the purification component of the present invention.

[0029] In the figure: 1. Tank body; 2. Water inlet pipe; 3. Aeration device; 4. Water outlet pipe; 5. Circulating water pump; 6. Fixing frame; 7. Delivery pipe; 8. Air outlet pipe; 9. Purification component; 901. Filter element; 902. Snap-fit ​​groove; 903. Connecting plate; 904. Threaded rod; 905. Anti-slip nut; 10. Support frame; 11. Filling module; 12. Stop block; 13. Snap-fit ​​block; 14. Threaded groove; 15. Drain pipe. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] See also Figure 1-6 , the present invention provides a technical solution: an anaerobic ammonia oxidation reactor based on gas internal circulation, comprising a tank body 1, a water inlet pipe 2 is connected to the surface of one side of the tank body 1 near the top; an aeration device 3 is provided inside the tank body 1, a water outlet pipe 4 is connected to the surface of the other side of the tank body 1 near the top, a circulating water pump 5 is fixedly connected to the surface of the outlet pipe 4 away from the side of the tank body 1, a fixing bracket 6 is connected to the surface of the circulating water pump 5, one side surface of the fixing bracket 6 is fixedly connected to the tank body 1, a delivery pipe 7 is fixedly connected to the surface of the circulating water pump 5 near the bottom, a delivery pipe 7 is connected to the tank body 1 on the side away from the circulating water pump 5, and an air outlet pipe 8 is connected to the surface of the tank body 1 near the middle; it also includes: a purification component 9 is provided inside the air outlet pipe 8; wherein the purification component 9 includes a filter 901 slidably connected to the air outlet pipe 8; wherein the filter 901 is symmetrically provided with a snap-fitting groove 902 on the surface of the side near the air outlet pipe 8, Figure 1-6 As shown, by setting up a purification device, the threaded plug 904 and the anti-slip nut 905 on the purification device are matched, so that the purification device can be installed at the end of the outlet pipe 8. At the same time, by setting up the aeration device 3, the outlet pipe 4, the circulating water pump 5, the fixing frame 6, the delivery pipe 7, the outlet pipe 8 and the filler module 11, the mixing effect and mass transfer efficiency of microorganisms and wastewater are improved, the removal ability of ammonia nitrogen is enhanced, and efficient and stable wastewater treatment is achieved.

[0032] The filter element 901 is fixedly connected to a connecting plate 903 on one side away from the air outlet pipe 8. Threaded rods 904 are connected to both sides of the connecting plate 903. An anti-slip nut 905 is threadedly connected to one side of the threaded rod 904. One side of the anti-slip nut 905 is fitted and connected to the connecting plate 903. The connecting plate 903 is fitted and connected to the air outlet pipe 8 on one side close to the filter element 901. Figure 3 、 5 As shown in Figure 6, when the filter element 901 needs to be replaced, the anti-slip nut 905 is separated from the threaded rod 904 by using a tool device, and then the threaded rod 904 is rotated to separate the threaded rod 904 from the thread groove 14. After the threaded rod 904 is completely separated from the thread groove 14, the connecting plate 903 is pulled to move the filter element 901, so that the engaging groove 902 on the filter element 901 is separated from the engaging block 13, so that the filter element 901 can be disassembled and replaced. At the same time, the filter element 901 is an activated carbon adsorption module in the prior art, so that the porous structure of the activated carbon is used to adsorb hydrogen sulfide, VOCs, and odor substances in the gas to prevent them from adhering to the inner wall of the pipe.

[0033] A plurality of support frames 10 are connected through one side of the surface of the aeration device 3 near the bottom, and the bottom surface of the support frame 10 is fixedly connected to the tank body 1. Figure 2 As shown, the support frame 10 supports the aeration device 3, and the support frame 10 can be coated with anti-corrosion and anti-rust paint according to actual conditions.

[0034] Several packing modules 11 are fixedly installed inside the tank body 1, such as Figure 2 As shown, the filler module 11 is made of porous polymer material and has a rich pore structure inside, which provides a large amount of attachment and growth space for anaerobic ammonia-oxidizing bacteria. At the same time, the pore structure of the filler is conducive to the flow and diffusion of wastewater inside the filler, further increasing the contact area between microorganisms and wastewater, and enhancing the removal effect of ammonia nitrogen.

[0035] The inside of the air outlet pipe 8 is symmetrically provided with a stopper 12, and a snap-fit ​​block 13 is fixedly connected to the middle of one side surface of the stopper 12, and the snap-fit ​​block 13 is snap-fitted with the snap-fit ​​groove 902. The side surface of the air outlet pipe 8 away from the tank body 1 is symmetrically provided with a threaded groove 14, and the threaded groove 14 is threadedly connected with the threaded rod 904. Figure 4-6As shown, when the filter 901 is installed, the filter 901 is placed inside the air outlet pipe 8, so that the clamping groove 902 on the filter 901 is aligned with the clamping block 13, then the connecting plate 903 is pushed to move the filter 901, so that the clamping groove 902 on the filter 901 is clamped with the clamping block 13, then the threaded rod 904 is screwed into the threaded groove 14, and the anti-loosening nut 905 is screwed on the threaded rod 904, thereby completing the installation of the purification device, thereby reducing the stress on the filter 901 to some extent, thereby reducing the damage to the filter 901 during installation.

[0036] The tank body 1 is connected with a drain pipe 15 through a side surface close to the bottom. Figure 1 As shown, the drain pipe 15 can discharge treated sewage, and the drain pipe 15, the water inlet pipe 2 and the air outlet pipe 8 are all provided with valves, and the inner wall of the air outlet pipe 8 is sprayed with polytetrafluoroethylene PTFE and epoxy resin corrosion-resistant materials to prevent electrochemical corrosion of hydrogen sulfide and ammonia gas on the pipeline and reduce the attachment of pollutants.

[0037] In the application, the clamping block 13 and the clamping groove 902 adopt a stepped wedge structure: the front end of the clamping block (13) is provided with a 15° guide slope, and the rear end is a rectangular limiting section (width 8mm, height 10mm), the clamping groove 902 is correspondingly provided with a stepped groove, the cooperation gap between the guide slope and the groove wall is ≤0.1mm, the rectangular section and the groove bottom form an interference fit, and the interference amount is 0.05-0.1mm. The stop block 12 is an L-shaped plate structure, the vertical section is welded with the inner wall of the air outlet pipe 8, the weld height is ≥3mm, the horizontal section is provided with a flow guide hole with a diameter of 5mm and a hole distance of 15mm, the flow guide hole and the air outlet pipe 8 axis form a 30° angle, forming a spiral airflow guide structure.

[0038] In the application, the filler module 11 adopts a three-layer composite structure: the inner layer is a porous ceramic skeleton with a porosity of ≥75% and a pore size of 1-3mm, the middle layer is a polypropylene fiber net with a wire diameter of 0.2mm and a mesh of 50, and the outer layer is a polyurethane elastomer with a Shore hardness of 45A, and a surface provided with radial grooves with a groove depth of 2mm, a width of 3mm and a groove distance of 8mm. The edge of the filler module 11 is provided with a tenon structure with a length of 12mm and a thickness of 5mm, which is matched with the mortise groove on the inner wall of the tank body 1 with a depth of 13mm and a width of 6mm, and the tenon groove contact surface is coated with silicone sealant with a thickness of 0.3mm to ensure the air tightness of the module after installation ≥1kPa.

[0039] In the present invention, the gas distribution pipe of the aeration device 3 adopts a variable diameter design: the main pipe, with a diameter of 32mm, and the branch pipe, with a diameter of 20mm, are connected by a tapered tee (taper 1:4). The microporous aeration heads (pore diameter 30-40μm) at the end of the branch pipe are arranged in a plum blossom shape (spacing 50mm), and the service area of ​​a single aeration head is ≤0.2m 2 The support frame 10 is a hollow tubular truss structure (tube diameter 20mm, wall thickness 3mm). Its top is clamped to the aeration device 3 via a U-shaped clamp (clamp inner diameter 35mm), and its bottom is connected to the bottom plate of the tank body 1 via a flange (diameter 80mm) with bolts. The bolts are M10×40 and the pre-tightening torque is 25-30N·m. A rubber gasket with a thickness of 2mm and a hardness of Shore 55A is set between the flange and the bottom plate.

[0040] Working principle: Before using this anaerobic ammonium oxidation reactor based on gas internal circulation, it is necessary to check the overall condition of the device to ensure that it can work normally. Figure 1 - Figure 6 As shown, first, by setting up a purification device, when the filter element (901) needs to be replaced, the anti-slip nut 905 is separated from the threaded rod 904 by using a tool device, and then the threaded rod 904 is rotated to separate the threaded rod 904 from the thread groove 14. After the threaded rod 904 is completely separated from the thread groove 14, the connecting plate 903 is pulled to make the connecting plate 903 drive the filter element (901) to move, so that the engaging groove 902 on the filter element (901) is separated from the engaging block 13, so that the filter element (901) can be disassembled, so that the filter element (901) can be replaced, and the filter element (901) can be removed. ) is installed by placing the filter element (901) inside the air outlet pipe 8 so that the engaging groove 902 on the filter element (901) is aligned with the engaging block 13, and then pushing the connecting plate 903 so that the connecting plate 903 drives the filter element (901) to move, so that the engaging groove 902 on the filter element (901) is engaged with the engaging block 13, and then screwing the threaded insert 904 into the threaded groove 14, and the anti-slip nut 905 is threadedly connected to the threaded insert 904, thereby completing the installation of the purification device, which can reduce the stress on the filter element (901) to a certain extent, thereby reducing the risk of damage to the filter element (901) during installation.

[0041] Secondly, by arranging an aeration device 3, an outlet pipe 4, a circulating water pump 5, a fixing frame 6, a delivery pipe 7, an outlet pipe 8 and a filler module 11, a modular filler structure is set in each layer of the reaction channel. The filler module 11 is made of a porous polymer material and has a rich pore structure inside, which provides a large amount of attachment and growth space for anaerobic ammonia-oxidizing bacteria. At the same time, the pore structure of the filler is conducive to the flow and diffusion of wastewater inside the filler, further increasing the contact area between microorganisms and wastewater, and enhancing the removal effect of ammonia nitrogen. At the same time, the reactor is equipped with an intelligent control system, which includes a pH sensor, a DO sensor and other monitoring equipment to monitor various operating parameters in the reactor in real time. According to the monitoring data, the intelligent control system can automatically adjust the aeration volume, water inlet flow rate and other parameters of the aeration device 3 to maintain the optimal operating conditions in the reactor. The setting of the intelligent control system realizes the automatic operation of the reactor, reduces manual intervention and reduces labor costs. At the same time, the tank body 1 is a three-dimensional circular reaction structure, and the three-dimensional circular reaction structure makes full use of the space, changes the plane layout mode of the traditional reactor, and greatly reduces the footprint of the reactor under the same treatment scale. It is particularly suitable for areas with tight land resources and reduces land use costs.

[0042] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anaerobic ammonium oxidation reactor based on internal gas circulation, comprising a tank body (1), wherein a water inlet pipe (2) is connected to a surface of one side of the tank body (1) near the top; An aeration device (3) is provided inside the tank body (1); a water outlet pipe (4) is connected to the other side surface of the tank body (1) near the top; a circulating water pump (5) is fixedly connected to the side surface of the water outlet pipe (4) away from the tank body (1); a fixing frame (6) is connected to the surface of the circulating water pump (5); a side surface of the fixing frame (6) is fixedly connected to the tank body (1); a delivery pipe (7) is fixedly connected to the side surface of the circulating water pump (5) near the bottom; a side surface of the delivery pipe (7) away from the side surface of the circulating water pump (5) is connected to the tank body (1); an air outlet pipe (8) is connected to the side surface of the tank body (1) near the middle; It is characterized by: Also includes: A purification component (9) is provided inside the air outlet pipe (8); Wherein, the purification component (9) includes a filter element (901) slidably connected to the air outlet pipe (8); Wherein, a clamping groove (902) is symmetrically provided on a surface of one side of the filter element (901) close to the air outlet pipe (8).

2. The anaerobic ammonium oxidation reactor based on gas internal circulation according to claim 1, characterized in that: A connecting plate (903) is fixedly connected to the surface of one side of the filter element (901) away from the air outlet pipe (8), threaded rods (904) are connected through both sides of the surface of the connecting plate (903), and an anti-slip nut (905) is threadedly connected to the surface of one side of the threaded rod (904).

3. The anaerobic ammonium oxidation reactor based on gas internal circulation according to claim 2, characterized in that: One side surface of the anti-drop nut (905) is fitted and connected to the connecting plate (903), and one side surface of the connecting plate (903) close to the filter element (901) is fitted and connected to the air outlet pipe (8).

4. The anaerobic ammonium oxidation reactor based on gas internal circulation according to claim 1, characterized in that: A plurality of support frames (10) are connected through one side of the surface of the aeration device (3) close to the bottom, and the bottom surface of the support frame (10) is fixedly connected to the tank body (1).

5. The anaerobic ammonium oxidation reactor based on gas internal circulation according to claim 1, characterized in that: Several filling modules (11) are fixedly installed inside the tank body (1).

6. The anaerobic ammonium oxidation reactor based on gas internal circulation according to claim 1, characterized in that: A stopper (12) is symmetrically installed inside the air outlet pipe (8), a snap-fit ​​block (13) is fixedly connected to the middle of one side surface of the stopper (12), and the snap-fit ​​block (13) is snap-fitted with the snap-fit ​​groove (902). A threaded groove (14) is symmetrically provided on the side surface of the air outlet pipe (8) away from the tank body (1), and the threaded groove (14) is threadedly connected to the threaded rod (904).

7. The anaerobic ammonium oxidation reactor based on internal gas circulation according to claim 1, characterized in that: A drainage pipe (15) is connected through a surface of one side of the tank body (1) close to the bottom.

8. The anaerobic ammonium oxidation reactor based on gas internal circulation according to claim 6, characterized in that: The engaging block (13) and the engaging groove (902) adopt a stepped wedge-tightening structure: the front end of the engaging block (13) is provided with a 15°-30° guiding inclined surface, the rear end is a rectangular limiting section, the engaging groove (902) is provided with a stepped groove correspondingly, the matching clearance between the guiding inclined surface and the groove wall is ≤0.1mm, the rectangular section forms an interference fit with the groove bottom, the stopper (12) is an L-shaped plate structure, the vertical section thereof is welded to the inner wall of the air outlet pipe (8), and the horizontal section is provided with a guide hole, the guide hole and the axis of the air outlet pipe (8) form an angle of 20-40°, forming a spiral airflow guiding structure.

9. The anaerobic ammonium oxidation reactor based on gas internal circulation according to claim 5, characterized in that: The packing module (11) adopts a three-layer composite structure: the inner layer is a porous ceramic skeleton, the middle layer is a polypropylene fiber mesh, and the outer layer is a polyurethane elastomer. Radial grooves are provided on the surface. The edge of the packing module (11) is provided with a convex tenon structure, which is interference-fitted with the concave tenon groove of the inner wall of the tank body (1), and the tenon groove contact surface is coated with silicone sealant.

10. The anaerobic ammonium oxidation reactor based on gas internal circulation according to claim 4, characterized in that: The gas distribution pipe of the aeration device (3) adopts a variable diameter design: the main pipe and the branch pipe are connected by a tapered tee with a taper of 1:

4. The microporous aeration heads at the ends of the branch pipes are arranged in a plum blossom shape, and the service area of ​​a single aeration head is ≤0.2m 2 The support frame (10) is a hollow tubular truss structure, the top of which is clamped to the aeration device (3) through a U-shaped clamp, and the bottom is bolted to the bottom plate of the tank body (1) through a flange, and a rubber gasket is provided between the flange and the bottom plate.

Images