Sulfur autotrophic nitrogen removal reactor

Abstract

The invention belongs to the technical field of sewage treatment, and discloses a sulfur autotrophic nitrogen removal reactor, which comprises a reactor body for sewage treatment, the reactor body is filled with a filler, the filler contains a sulfur element and mineral substances required by reaction, and the filler has a large specific surface area and strong microorganism loading capacity; the water circulation assembly is communicated with the reactor body and is used for circulating sewage in the reactor, so that the sewage in the reactor is circularly mixed for multiple times through the water circulation assembly, and the reaction is more sufficient and thorough; the backwashing assembly is communicated with the reactor body and is used for carrying out backwashing cleaning on the reactor body; the control assembly is arranged on the reactor body and is used for controlling the automatic operation of the reaction. According to the present invention, the structure design is reasonable, the functions of each component are clear, the installation and the maintenance are easy, the processing parameters are accurately controlled, the unique metabolism characteristics of the autotrophic microorganisms can be effectively utilized, the efficient nitrogen removal effect can be achieved without the additional organic carbon source, and the significant economic and environmental benefits are provided.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a sulfur autotrophic denitrification reactor. Background Art

[0002] Industrial wastewater from some specific industries, such as chemical, pharmaceutical, and food processing, often contains high concentrations of ammonia nitrogen and other difficult-to-biodegrade organic matter. In the wastewater treatment process, ammonia nitrogen is one of the common pollutants, and the traditional nitrification-denitrification process requires a large amount of organic carbon sources to support the growth and denitrification of heterotrophic bacteria.

[0003] Sulfur autotrophic denitrification reactors can use inorganic sulfur or hydrogen in wastewater as electron donors to achieve an efficient denitrification process without the need to add additional organic carbon sources, thereby reducing operating costs and reducing the generation of residual sludge. However, the existing sulfur autotrophic denitrification reactors have deficiencies in mixing and stirring, and the contact between wastewater and microorganisms is insufficient, resulting in reduced treatment efficiency; secondly, the existing sulfur autotrophic denitrification reactors have inaccurate sulfur source supply, and the sulfur source supply is difficult to accurately control, resulting in unstable reactor operation; and the existing sulfur autotrophic denitrification reactors have deficiencies in automated control, lack of real-time monitoring and automated control systems, and require a lot of manual intervention during operation, which is difficult to maintain in the best state and affects the treatment effect; at the same time, the existing sulfur autotrophic denitrification reactors have deficiencies in modular design, and the equipment installation and maintenance are relatively complex, making it difficult to adapt to different scales of sewage treatment needs.

[0004] Therefore, the present application designs a sulfur autotrophic denitrification reactor to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a sulfur autotrophic denitrification reactor to solve the problems existing in the prior art.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a sulfur autotrophic denitrification reactor, comprising:

[0007] A reactor body, which serves as a container for sewage reaction and is filled with fillers containing sulfur elements and minerals required for the reaction;

[0008] A water circulation component, the water circulation component is connected to the reactor body and is used to pump the sewage to be treated into the reactor body, and the sewage in the reactor body is circulated and mixed through the water circulation component;

[0009] A backwashing component is connected to the reactor body, and uses clean water and compressed air to purge the filler to clean the sediment and dirt attached to the surface of the filler, so that the filler can be used repeatedly until all the sulfur elements are reacted;

[0010] A control component is arranged on the reactor body and is used to control the automatic operation of the reaction.

[0011] Preferably, the reactor body comprises a tank body, the tank body serves as a container for sewage reaction, and the filler is filled in the tank body; the water circulation component is respectively connected to both ends of the side wall of the tank body.

[0012] Preferably, a water outlet weir is provided at the top of the inner cavity of the tank body, and the water outlet weir is installed in the inner cavity of the tank body through a support rod. The top of the water outlet weir is higher than the upper end connection port between the water circulation component and the tank body; the water outlet weir is connected to the outside through the water outlet.

[0013] Preferably, the water circulation component comprises a first water inlet and a second water inlet which are correspondingly arranged on the side wall of the tank body from top to bottom, a circulating water pipe is arranged between the first water inlet and the second water inlet, and a circulating water pump is arranged on the circulating water pipe.

[0014] Preferably, the water circulation component comprises a water inlet pipe connected to the circulating water pipe, and the water inlet pipe is provided with a delivery pump for pumping in the sewage to be treated.

[0015] Preferably, the filler includes a first filter material, a second filter material and a third filter material which are arranged layer by layer from bottom to top in the inner cavity of the tank body, and the particle sizes of the first filter material, the second filter material and the third filter material gradually decrease.

[0016] Preferably, a support frame is provided in the inner cavity of the tank body, and the support frame divides the inner cavity of the tank body into a reaction chamber and a water inlet chamber arranged up and down, and the filler is stacked in the reaction chamber on the support frame; the backwashing assembly is connected to the water inlet chamber below the support frame, and the first water inlet is located below the support frame and is connected to the water inlet chamber.

[0017] Preferably, the backwash assembly comprises a backwash water interface connected to the inner cavity of the tank body, and the backwash water interface is located below the support frame and connected to the water inlet cavity.

[0018] Preferably, the backwashing assembly comprises a backwashing gas interface arranged on the tank body, and the backwashing gas interface is connected to the water inlet chamber through a backwashing gas pipe arranged in the tank body.

[0019] Preferably, a sawtooth-shaped water inlet edge is provided at the top of the outlet weir.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects: the present invention discloses a sulfur autotrophic denitrification reactor. The reactor body is the core unit of sewage treatment, and its interior is carefully filled with high-efficiency fillers to meet the sulfur, minerals and autotrophic microbial communities required for the reaction, ensuring the continuous progress of the reaction, ensuring the stability and efficiency of the reaction, and realizing an excellent sulfur autotrophic denitrification process through the exquisite coordination of microorganisms and sulfur elements, effectively reducing nitrogen pollutants in sewage and significantly improving water quality; the reactor body is closely connected with the water circulation component, which is not only responsible for accurately pumping the sewage to be treated into the reactor, but also through its powerful circulation function, realizing the full mixing of the sewage inside the reactor, significantly improving the reaction efficiency and uniformity; at the same time The water circulation component can also effectively prevent sludge deposition, ensure the uniformity and stability of the flow state inside the reactor, so that all treatment areas can be fully reacted and treated. Under anoxic conditions, this design is more helpful to prevent the occurrence of local anaerobic conditions, providing a strong guarantee for the smooth progress of the autotrophic denitrification process; the backwash component is seamlessly connected to the reactor body. Through regular backwashing operations, it can completely remove blockages and dirt accumulation inside the reactor, effectively extend the service life of the packing, and ensure the continuous and efficient operation of the reactor; the reactor body is also integrated with advanced control components to realize comprehensive automated control of the reaction process, which not only greatly reduces the need for manual intervention, but also significantly improves the convenience of operation and the stability of the reaction. When the reactor is in normal use, the water circulation component starts working and introduces sewage into the reactor. After the sewage comes into contact with the microorganisms and sulfur in the filler, an efficient denitrification reaction is immediately started. When the water volume in the reactor reaches the preset standard, the water circulation component continues to operate to ensure that the sewage is in full contact with the filler, and the microorganisms make full use of the sulfur element for autotrophic denitrification, converting nitrogen pollutants into harmless substances, and then discharging the treated water. As the reaction continues, the control component will start the backwash component in a timely manner according to the preset program, thoroughly clean the reactor, restore the reaction activity of the filler, and provide a solid guarantee for the long-term stable operation of the equipment.

[0021] The present invention has a reasonable structural design, clear functions of each component, and is easy to install and maintain. By precisely controlling the treatment parameters, it can effectively utilize the unique metabolic characteristics of autotrophic microorganisms to achieve efficient denitrification without the need for an external organic carbon source, thus having significant economic and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the sulfur autotrophic denitrification reactor of the present invention;

[0024] Figure 2 It is a schematic diagram of the control component of the present invention;

[0025] In the figure: 1. reactor body; 2. water circulation component; 3. backwash component; 4. control component; 11. tank body; 12. filler; 13. water outlet weir; 14. water outlet; 15. support frame; 16. manhole; 121. first filter material; 122. second filter material; 123. third filter material; 131. fixing rod 132. water inlet edge; 151. water inlet chamber; 152. reaction chamber; 21. first water inlet; 22. second water inlet; 23. circulating water pipe; 24. circulating water pump; 25. water inlet pipe; 26. delivery pump; 27. first check valve; 28. second check valve; 29. ​​flow meter; 31. backwash water interface; 32. backwash gas interface; 33. backwash gas pipe; 34. gas distribution connecting pipe; 35. gas distribution pipe; 41. control module; 42. power supply module; 43. display module; 44. input module; 45. sensor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Reference Figure 1-Figure 2 As shown, this embodiment provides a sulfur autotrophic denitrification reactor, comprising:

[0029] The reactor body 1 is used as a container for sewage reaction. The reactor body 1 is filled with a filler 12, and the filler 12 contains sulfur elements and minerals required for the reaction;

[0030] A water circulation component 2, which is connected to the reactor body 1 and is used to pump the sewage to be treated into the reactor body 1, and the sewage in the reactor body 1 is circulated and mixed through the water circulation component 2;

[0031] The backwashing assembly 3 is connected to the reactor body 1, and uses clean water and compressed air to purge the filler 12, so as to clean the sediment and dirt attached to the surface of the filler 12, so that the filler 12 can be used repeatedly until all the sulfur elements are reacted;

[0032] The control component 4 is arranged on the reactor body 1 and is used to control the automatic operation of the reaction.

[0033] The present invention discloses a sulfur autotrophic denitrification reactor. The reactor body 1 is a core unit for sewage treatment. The reactor body 1 is carefully filled with high-efficiency fillers 12 to meet the sulfur minerals and autotrophic microbial groups required for the reaction, ensuring the continuous progress of the reaction, ensuring the stability and efficiency of the reaction, and realizing an excellent sulfur autotrophic denitrification process through the exquisite coordination of microorganisms and sulfur elements, effectively reducing nitrogen pollutants in sewage and significantly improving water quality; the reactor body 1 is closely connected with the water circulation component 2, which is not only responsible for accurately pumping the sewage to be treated into the reactor, but also through its powerful circulation function, realizing the full mixing of the sewage inside the reactor, significantly improving the reaction efficiency and uniformity; at the same time, the water circulation component 2 can also effectively prevent Sludge deposition ensures the uniformity and stability of the flow state inside the reactor, so that all treatment areas can be fully reacted and treated. Under anoxic conditions, this design is more conducive to preventing the occurrence of local anaerobic conditions, providing a strong guarantee for the smooth progress of the autotrophic denitrification process; the backwash component 3 is seamlessly connected to the reactor body 1. Through regular backwashing operations, it can completely remove blockages and dirt accumulation inside the reactor, effectively extend the service life of the filler 12, and ensure the continuous and efficient operation of the reactor; the reactor body 1 is also integrated with an advanced control component 4 to achieve comprehensive automated control of the reaction process, which not only greatly reduces the need for manual intervention, but also significantly improves the convenience of operation and the stability of the reaction. When the reactor is in normal use, the water circulation component 2 starts to work, introduces sewage into the reactor, and immediately starts an efficient denitrification reaction after the sewage contacts the microorganisms and sulfur elements in the filler 12; when the water volume in the reactor reaches the preset standard, the water circulation component 2 continues to operate to ensure that the sewage is fully in contact with the filler 12, and the microorganisms make full use of the sulfur element for autotrophic denitrification, converting nitrogen pollutants into harmless substances, and then discharge the treated clean water; as the reaction continues, the control component 4 will start the backwash component 3 in time according to the preset program, thoroughly clean the reactor, restore the reaction activity of the filler 12, and provide a solid guarantee for the long-term stable operation of the equipment. The present invention has a reasonable structural design, clear functions of each component, easy installation and maintenance, and can effectively utilize the unique metabolic characteristics of autotrophic microorganisms by accurately controlling the processing parameters, and achieve efficient denitrification without the need for an external organic carbon source, with significant economic and environmental benefits.

[0034] Further optimizing the scheme, the reactor body 1 includes a tank body 11, which is used as a container for sewage reaction, and a filler 12 is filled in the tank body 11; the water circulation component 2 is respectively connected to the two ends of the side wall of the tank body 11. The tank body 11 is used as a reaction container for sewage treatment, and the inside is filled with fillers 12. The water circulation component 2 cleverly uses the water inlets at both ends of the side wall of the tank body 11 to achieve the circulation and mixing of sewage, ensure the uniform distribution of sewage in the tank body 11, improve the reaction efficiency, and effectively prevent sludge deposition, keeping the reaction environment clean and efficient.

[0035] In one embodiment of the present application, a manhole 16 is provided on the side wall of the tank body 11 to facilitate internal inspection and maintenance.

[0036] Further optimization scheme, a water outlet weir 13 is provided at the top of the inner cavity of the tank body 11, and the water outlet weir 13 is installed in the inner cavity of the tank body 11 through a fixing rod 131, and the top of the water outlet weir 13 is higher than the upper end connection port of the water circulation component 2 and the tank body 11; the water outlet weir 13 is connected to the outside through the water outlet 14. The water outlet weir 13 is installed in the inner cavity of the tank body 11 through a solid support rod, and its top is designed to be higher than the connection port between the circulation component and the tank body 11, ensuring that the treated sewage flows into the water outlet weir 13 in a stable and uniform manner, and is smoothly discharged through the water outlet 14, avoiding sewage overflow and local water accumulation problems, and improving the quality of the water outlet.

[0037] Further optimizing the scheme, the water circulation component 2 includes a first water inlet 21 and a second water inlet 22 which are correspondingly arranged on the side wall of the tank body 11, a circulating water pipe 23 is arranged between the first water inlet 21 and the second water inlet 22, and a circulating water pump 24 is arranged on the circulating water pipe 23. The first water inlet 21 and the second water inlet 22 are closely connected through the circulating water pipe 23, and the circulating water pipe 23 is equipped with an efficient circulating water pump 24, which provides strong power for sewage circulation, ensures continuous and uniform mixing of sewage inside the reactor, further improves reaction efficiency and uniformity, and lays a solid foundation for efficient reaction.

[0038] In a further optimized solution, the water circulation component 2 includes a water inlet pipe 25 connected to the circulating water pipe 23, and a delivery pump 26 for pumping the sewage to be treated is provided on the water inlet pipe 25. The water inlet pipe 25 is cleverly connected to the circulating water pipe 23, and the delivery pump 26 stably delivers the sewage to be treated into the reactor body 1, providing a continuous supply of raw materials for the denitrification reaction, ensuring the continuity and stability of the reaction process.

[0039] In one embodiment of the present application, a first check valve 27 is provided on the circulating water pipe 23. The first check valve 27 is arranged between the first water inlet 21 and the circulating water pump 24. The first check valve 27 opens unidirectionally toward the first water inlet 21 to prevent the circulating sewage from flowing back.

[0040] In one embodiment of the present application, a second check valve 28 is provided on the water inlet pipe 25. The second check valve 28 is arranged between the delivery pump 26 and the circulating water pipe 23. The second check valve 28 is opened unidirectionally toward the circulating water pipe 23 to prevent the sewage in the circulation from flowing back, thereby further ensuring the stable operation of the system.

[0041] In one embodiment of the present application, a flow meter 29 is provided on the water inlet pipe 25, which can accurately monitor and control the sewage content pumped into the tank 11, providing strong support for the precise control of the reaction process.

[0042] Further optimizing the scheme, the filler 12 includes a first filter material 121, a second filter material 122 and a third filter material 123 arranged layer by layer from bottom to top in the inner cavity of the tank body 11, and the particle sizes of the first filter material 121, the second filter material 122 and the third filter material 123 gradually decrease. The filler 12 is arranged layer by layer, and the particle size gradually decreases from bottom to top. This design is conducive to the step-by-step filtration of sewage and the attachment and growth of microorganisms, significantly improving the filtration effect of the filler 12 and the microbial attachment area, and creating favorable conditions for the denitrification reaction.

[0043] In one embodiment of the present application, the first filter material 121 is made of porous filter bricks, the second filter material 122 is made of pebbles, and the third filter material 123 is made of special sulfur autotrophic filter material. The particle size gradually decreases to provide a rich attachment and growth surface for microorganisms, while ensuring that the incoming water is evenly distributed, so that the water flow is fully in contact with the filler 12 and the microorganisms, thereby improving the treatment efficiency.

[0044] In one embodiment of the present application, the filler 12 provides a stable growth environment for the microorganisms, supports the effective attachment of autotrophic denitrifying bacteria and reacts with nitrates in the wastewater. At the same time, it ensures sufficient contact between the wastewater and the microorganisms, further improving the treatment efficiency. The microorganisms can be produced by themselves or artificially inoculated as needed, flexibly meeting the use requirements.

[0045] In one embodiment of the present application, the microorganisms can be produced spontaneously or artificially inoculated as needed to flexibly meet usage requirements.

[0046] In one embodiment of the present application, solid sulfur or other forms of sulfur compounds exist in the filler 12. These sulfur compounds are oxidized as electron donors during the reaction and gradually converted into sulfate ions SO4. 2- At the same time, nitrate NO 3- As an electron acceptor, it is reduced to nitrogen gas N2. This process is completed by autotrophic denitrifying bacteria, which use the nitrate respiration pathway for energy metabolism to achieve efficient denitrification.

[0047] In one embodiment of the present application, the above reaction formula includes:

[0048]

[0049] In one embodiment of the present application, sulfur or its compounds include sulfur element S, hydrogen sulfide H2S, sulfite SO3 2- Etc., these compounds play a key role in the reaction.

[0050] Further optimization scheme, the inner cavity of the tank body 11 is provided with a support frame 15, and the support frame 15 divides the inner cavity of the tank body 11 into a reaction chamber 152 and a water inlet chamber 151 arranged up and down, and the filler 12 is stacked in the reaction chamber 152 on the support frame 15; the backwash component 3 is connected to the water inlet chamber 151 below the support frame 15, and the first water inlet 21 is located below the support frame 15 and connected to the water inlet chamber 151. The support rod firmly fixes the support frame 15 in the inner cavity of the tank body 11, and reasonably divides the internal space of the tank body 11 into two upper and lower areas: the reaction chamber 152 and the water inlet chamber 151; the filler 12 is stacked in the reaction chamber 152, and the backwash component 3 is connected to the water inlet chamber 151, which is used to regularly clean the filler 12 and extend its service life.

[0051] Further optimization scheme, the backwash component 3 includes a backwash water interface 31 connected to the inner cavity of the tank body 11, the backwash water interface 31 is located below the support frame 15 and connected to the water inlet chamber 151; the backwash component 3 includes a backwash gas interface 32 arranged on the tank body 11, and the backwash gas interface 32 is connected to the water inlet chamber 151 through a backwash gas pipe 33 arranged in the tank body 11. The backwash water interface 31 is located below the support frame 15 and connected to the water inlet chamber 151, ensuring that the backwash water can evenly enter the water inlet chamber 151 and thoroughly clean the filler 12. At the same time, the backwash gas interface 32 is connected to the water inlet chamber 151 through the backwash gas pipe 33, and compressed air is injected to enhance the backwashing effect. The combined action of the backwash water and the compressed air effectively breaks the sludge adhered to the support frame 15, and the dirt and impurities on the surface of the filler 12 are easier to remove.

[0052] In one embodiment of the present application, the backwash air pipe 33 passes through the water outlet weir 13 and is fixedly connected thereto, which not only improves the stability of the water outlet weir 13 but also serves to connect the gas.

[0053] In one embodiment of the present application, the backwashing air pipe 33 is connected to a plurality of air distribution connecting pipes 34 so that the compressed air for backwashing can be evenly distributed within the range of the support frame 15. The ends of the air distribution connecting pipes 34 are connected to air distribution pipes 35, and the compressed air is discharged through the small holes on the air distribution pipes 35, thereby expanding the air outlet range of the compressed air and improving the backwashing effect.

[0054] To further optimize the solution, a sawtooth-shaped water inlet edge 132 is provided at the top of the water outlet weir 13. The sawtooth-shaped water inlet edge design is adopted at the top of the water outlet weir 13. This innovative design not only improves the drainage efficiency and ensures that the treated sewage can be discharged from the reaction zone smoothly and evenly, but also effectively intercepts solids in the sewage to avoid accumulation in the water outlet weir 13, thereby improving the water quality.

[0055] In one embodiment of the present application, the control component 4 integrates a control module 41, a power supply module 42, a display module 43, an input module 44 and multiple sensors 45 to achieve real-time monitoring and precise control of the entire reaction process, reduce manual intervention through automated control, and improve operational efficiency and reliability.

[0056] In one embodiment of the present application, the control module 41 adopts an advanced PLC control system, which automatically controls the operation of each subsystem through a programmable logic controller to ensure efficient and stable operation of the system.

[0057] In one embodiment of the present application, the display module 43 uses a display screen with a touch screen control function, which can not only display the operating parameters of the device in real time, but also conveniently control the operation of the device through the touch screen function, thereby improving the convenience of operation.

[0058] In one embodiment of the present application, the input module 44 is in the form of buttons and physical keyboards, etc., and provides a comprehensive input control instruction function to ensure that the operator can input control instructions flexibly and accurately.

[0059] In one embodiment of the present application, a plurality of sensors 45 are carefully arranged inside and outside the tank 11 to monitor water quality parameters in real time, including key information such as nitrate, pH value, temperature, flow rate, total nitrogen, etc., to provide accurate data feedback for the automatic operation of the equipment and ensure that the reaction process is always in the best state.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A sulfur autotrophic denitrification reactor, characterized in that: include: A reactor body (1), the reactor body (1) serving as a container for sewage reaction, the reactor body (1) being filled with a filler (12), the filler (12) containing sulfur elements and minerals required for the reaction; a water circulation component (2), the water circulation component (2) being connected to the reactor body (1) and used for pumping the sewage to be treated into the reactor body (1), and the sewage in the reactor body (1) being circulated and mixed through the water circulation component (2); A backwashing assembly (3), the backwashing assembly (3) being connected to the reactor body (1), uses clean water and compressed air to purge the filler (12), so as to clean the sediment, dirt and the like attached to the surface of the filler (12), so that the filler (12) can be used repeatedly until all the sulfur elements are reacted; A control component (4), wherein the control component (4) is arranged on the reactor body (1) and is used to control the automatic operation of the reaction.

2. The sulfur autotrophic denitrification reactor according to claim 1, characterized in that: The reactor body (1) comprises a tank body (11), the tank body (11) serving as a container for sewage reaction, the filler (12) being filled in the tank body (11); the water circulation component (2) is respectively connected to both ends of the side wall of the tank body (11).

3. The sulfur autotrophic denitrification reactor according to claim 2, characterized in that: A water outlet weir (13) is provided at the top end of the inner cavity of the tank body (11); the water outlet weir (13) is installed in the inner cavity of the tank body (11) via a support rod (131); the top end of the water outlet weir (13) is higher than the upper end connection port of the water circulation component (2) and the tank body (11); the water outlet weir (13) is connected to the outside through a water outlet (14).

4. The sulfur autotrophic denitrification reactor according to claim 2, characterized in that: The water circulation component (2) comprises a first water inlet (21) and a second water inlet (22) which are arranged on the side wall of the tank body (11) in correspondence with each other, a circulating water pipe (23) is arranged between the first water inlet (21) and the second water inlet (22), and a circulating water pump (24) is arranged on the circulating water pipe (23).

5. The sulfur autotrophic denitrification reactor according to claim 4, characterized in that: The water circulation component (2) comprises a water inlet pipe (25) connected to the circulating water pipe (23), and a delivery pump (26) for pumping in sewage to be treated is arranged on the water inlet pipe (25).

6. The sulfur autotrophic denitrification reactor according to claim 2, characterized in that: The filler (12) comprises a first filter material (121), a second filter material (122) and a third filter material (123) which are arranged layer by layer from bottom to top in the inner cavity of the tank body (11), and the particle sizes of the first filter material (121), the second filter material (122) and the third filter material (123) gradually decrease.

7. The sulfur autotrophic denitrification reactor according to claim 4, characterized in that: The inner cavity of the tank body (11) is provided with a support frame (15), and the support frame (15) divides the inner cavity of the tank body (11) into a reaction chamber (152) and a water inlet chamber (151) arranged up and down; the filler (12) is stacked in the reaction chamber (152) on the support frame (15); the backwashing component (3) is connected to the water inlet chamber (151) below the support frame (15); and the first water inlet (21) is located below the support frame (15) and is connected to the water inlet chamber (151).

8. The sulfur autotrophic denitrification reactor according to claim 7, characterized in that: The backwash assembly (3) comprises a backwash water interface (31) in communication with the inner cavity of the tank body (11); the backwash water interface (31) is located below the support frame (15) and in communication with the water inlet cavity (151).

9. The sulfur autotrophic denitrification reactor according to claim 8, characterized in that: The backwashing assembly (3) comprises a backwashing gas interface (32) arranged on the tank body (11), and the backwashing gas interface (32) is connected to the water inlet chamber (151) via a backwashing gas pipe (33) arranged in the tank body (11).

10. The sulfur autotrophic denitrification reactor according to claim 3, characterized in that: A sawtooth-shaped water inlet edge (132) is provided at the top of the water outlet weir (13).

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