Denitrification device with adjustable denitrification amount

Abstract

The utility model provides a kind of sulfur autotrophic denitrification device, the sulfur autotrophic denitrification device includes: sulfur autotrophic filter tank, its top end has sewage inlet, inlet weir and overflow port, bottom end has clean water outlet and backwash inlet, overflow port is located at the top of inlet weir, and the sewage inlet corresponds with the inlet weir;Sulfur autotrophic filler is located in sulfur autotrophic filter tank, and the upper end surface of sulfur autotrophic filler is located at the bottom of inlet weir, and the lower end surface of sulfur autotrophic filler is located at the top of the clean water outlet and backwash inlet;Clean water tank is located outside the sulfur autotrophic filter tank, and the clean water tank is provided with backwash outlet and clean water inlet, and clean water inlet and backwash outlet are respectively communicated with clean water outlet and backwash inlet, and clean water tank is located below the upper end surface of sulfur autotrophic filler, and water regulating valve is arranged between clean water inlet and clean water outlet. The present application not only can realize the adjustable control of nitrogen removal amount, but also improves the nitrogen removal effect.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a sulfur autotrophic denitrification device with adjustable nitrogen removal capacity. Background Technology

[0002] Research on sulfur autotrophic denitrification technology began in the 1970s. Compared with other autotrophic denitrification technologies, the reduced sulfides used as electron donors are inexpensive, readily available, less affected by water quality, and easy to utilize. Sulfur autotrophic denitrification technology utilizes the properties of sulfur and iron and the action of denitrifying bacteria to effectively remove nitrates and nitrites from wastewater, bringing a new breakthrough to wastewater treatment.

[0003] The sulfur autotrophic denitrification technology uses sulfur autotrophic denitrification packing material that can remove nitrates and nitrites at a rate of over 90%, which far exceeds the removal effect of traditional treatment methods, making it a promising technology for wastewater treatment.

[0004] Currently, commonly used sulfur autotrophic denitrification devices, such as Figure 1 As shown, the sulfur autotrophic denitrification device's sulfur autotrophic filter, due to its structural limitations, can only adopt a bottom-inlet and top-outlet configuration, making its nitrogen removal rate uncontrollable. Although this type of sulfur autotrophic denitrification device can remove nitrates and nitrites from wastewater, it suffers from drawbacks such as inconvenient nitrogen removal rate control and poor nitrogen removal efficiency. Therefore, how to achieve controllable nitrogen removal rate and how to improve nitrogen removal efficiency are urgent technical problems to be solved. Utility Model Content

[0005] In view of this, the present invention provides a sulfur autotrophic denitrification device with adjustable denitrification capacity to eliminate or improve one or more defects existing in the prior art.

[0006] One aspect of this utility model provides a sulfur autotrophic denitrification device with adjustable nitrogen removal capacity, the sulfur autotrophic denitrification device comprising:

[0007] The sulfur autotrophic filter has a sewage inlet, an inlet weir, and an overflow outlet at the top, and a clean water outlet and a backwash inlet at the bottom. The overflow outlet is located at the top of the inlet weir, and the sewage inlet corresponds to the inlet weir.

[0008] A sulfur self-growth packing material is located inside the sulfur self-growth filter tank. The upper end face of the sulfur self-growth packing material is located at the bottom of the inlet weir, and the lower end face of the sulfur self-growth packing material is located at the top of the clear water outlet and the backwash inlet.

[0009] A clear water tank is located outside the sulfur self-growth filter tank. The clear water tank is equipped with a backwash outlet and a clear water inlet. The clear water inlet and the backwash outlet are respectively connected to the clear water outlet and the backwash inlet. The clear water tank is located below the upper end face of the sulfur self-growth packing material, and an outlet regulating valve is provided between the clear water inlet and the clear water outlet.

[0010] In some embodiments of this utility model, the ratio of the volume of the sulfur autotrophic packing material to the volume of the sulfur autotrophic filter is in the range of 1:2 to 4:5; and / or,

[0011] The top end face of the clear water tank is located below one-third of the height of the sulfur self-growth packing.

[0012] In some embodiments of this utility model, the sulfur autotrophic filter includes a first section and a second section. The top end of the first section and the bottom end of the second section are both provided with flanges, and the flanges of the first section and the second section are detachably connected.

[0013] In some embodiments of this utility model, the sulfur autotrophic filter includes a sealing component located between the flange of the first section of the filter body and the flange of the second section of the filter body.

[0014] In some embodiments of this utility model, the sulfur autotrophic denitrification device includes a sewage inlet pump and a sewage inlet pipe. Both the sewage inlet pump and the sewage inlet pipe are located outside the sulfur autotrophic filter. The sewage inlet is connected to the output end of the sewage inlet pump through the sewage inlet pipe.

[0015] In some embodiments of this utility model, the sulfur autotrophic denitrification device includes a level gauge, which is installed at the top inside the sulfur autotrophic filter and is used to monitor the water level inside the sulfur autotrophic filter.

[0016] In some embodiments of this utility model, the sulfur autotrophic denitrification device includes a flow meter and an inlet regulating valve, both of which are installed on the sewage inlet pipe.

[0017] In some embodiments of this utility model, the clean water outlet and the clean water inlet are connected by a clean water outlet pipe, and the water outlet regulating valve is installed on the clean water outlet pipe.

[0018] In some embodiments of this utility model, the backwash outlet and the backwash inlet are connected by a backwash water pipe, the sulfur autotrophic denitrification device includes a backwash water pump, and the backwash water pump is located between the backwash outlet and the backwash water pipe.

[0019] In some embodiments of this utility model, the sulfur autotrophic denitrification device includes a backwash fan and a backwash inlet pipe. The bottom end of the sulfur autotrophic filter has a backwash inlet, and the backwash inlet is connected to the output end of the backwash fan through the backwash inlet pipe.

[0020] The sulfur autotrophic denitrification device disclosed in the above embodiments of this utility model includes a sulfur autotrophic filter, a sulfur autotrophic packing material, and a clear water tank. The sulfur autotrophic filter has a wastewater inlet, an inlet weir, and an overflow outlet at its top, and a clear water outlet and a backwash inlet at its bottom. The sulfur autotrophic packing material is located in the sulfur autotrophic filter, with its upper end face located at the bottom of the inlet weir and its lower end face located at the top of the clear water outlet and the backwash inlet. This sulfur autotrophic denitrification device adopts a top-inlet and bottom-outlet structure, meaning the wastewater flows through the sulfur autotrophic packing material in a downward flow pattern. Furthermore, the clear water tank of this sulfur autotrophic denitrification device is located within the filter. Below the upper surface of the sulfur autotrophic packing material, a water outlet regulating valve is installed between the clear water inlet and the clear water outlet. Since the highest liquid level in the clear water tank is always below the upper surface of the sulfur autotrophic packing material, the liquid level in the sulfur autotrophic filter can be easily adjusted by changing the valve size of the regulating valve between the clear water tank and the sulfur autotrophic filter. Furthermore, by controlling the liquid level in the sulfur autotrophic filter, the immersion height of the packing material can be adjusted, thus allowing for convenient adjustment of the denitrification rate. The clear water outlet of this structure is located below the sulfur autotrophic packing material, ensuring effective denitrification of the wastewater and improving the denitrification effect.

[0021] Additional advantages, objects, and features of this invention will be set forth in part in the description which follows, and will in part become apparent to those skilled in the art upon review of the description, or may be learned by practice of the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures specifically pointed out in the description and drawings.

[0022] Those skilled in the art will understand that the objectives and advantages achievable with this invention are not limited to those specifically described above, and that the above and other objectives achievable with this invention will become clearer from the following detailed description. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute a limitation thereof. The components in the drawings are not drawn to scale but are merely for illustrating the principles of the present invention. For ease of illustration and description of certain parts of the present invention, corresponding portions in the drawings may be enlarged, i.e., may appear larger relative to other components in an exemplary device actually manufactured according to the present invention. In the drawings:

[0024] Figure 1 This is a schematic diagram illustrating the principle of existing sulfur autotrophic denitrification technology.

[0025] Figure 2 This is a schematic diagram of the structure of a sulfur autotrophic denitrification device with adjustable denitrification capacity according to an embodiment of the present invention.

[0026] Figure label:

[0027] First tank section 110; Second tank section 120; Flange flange 130; Sulfur self-growth packing 200; Clear water outlet 111; Backwash inlet 112; Sewage inlet 121; Inlet weir 122; Overflow outlet 123; Clear water tank 300; Backwash outlet 310; Clear water inlet 320; Sewage inlet pump 410; Sewage inlet pipe 420; Level gauge 124; Flow meter 421; Inlet regulating valve 422; Clear water outlet pipe 510; Outlet regulating valve 511; Backwash water pipe 521; Backwash water pump 522; Backwash blower 531; Backwash air inlet pipe 532; Total nitrogen analyzer 125 Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain the present utility model, but are not intended to limit the present utility model.

[0029] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0030] It should be emphasized that the term "including / comprises" as used herein refers to the presence of a feature, element, step, or component, but does not exclude the presence or addition of one or more other features, elements, steps, or components.

[0031] It should also be noted that the directional terms such as "left end" and "right end" used in this specification are relative to the positions shown in the attached drawings. Unless otherwise specified, the term "connection" in this document can refer not only to a direct connection but also to an indirect connection involving an intermediate component. A direct connection is a connection between two components without the aid of an intermediate component, while an indirect connection is a connection between two components using other components.

[0032] In the following description, embodiments of the present invention will be illustrated with reference to the accompanying drawings. In the drawings, the same reference numerals denote the same or similar parts.

[0033] Figure 2This is a schematic diagram of the structure of a sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to an embodiment of the present invention, as shown below. Figure 2 As shown, the sulfur autotrophic denitrification device includes at least a sulfur autotrophic filter, a sulfur autotrophic packing material 200, and a clear water tank 300.

[0034] The sulfur autotrophic filter has a wastewater inlet 121, an inlet weir 122, and an overflow outlet 123 at its top, and a clean water outlet 111 and a backwash inlet 112 at its bottom. The overflow outlet 123 is located at the top of the inlet weir 122, and the wastewater inlet 121 corresponds to the inlet weir 122. A sulfur autotrophic packing material 200 is located inside the sulfur autotrophic filter. The upper end face of the sulfur autotrophic packing material 200 is located at the bottom of the inlet weir 122, and the lower end face of the sulfur autotrophic packing material 200 is located at the clean water outlet. The top of the inlet 111 and the backwash inlet 112; the clear water tank 300 is located outside the sulfur self-growth filter tank. The clear water tank 300 is provided with a backwash outlet 310 and a clear water inlet 320. The clear water inlet 320 and the backwash outlet 310 are respectively connected to the clear water outlet 111 and the backwash inlet 112. The clear water tank 300 is located below the upper end face of the sulfur self-growth packing 200, and a water outlet regulating valve 511 is provided between the clear water inlet 320 and the clear water outlet 111.

[0035] In this embodiment, wastewater enters from the wastewater inlet 121 at the top of the autotrophic sulfur filter and flows through the inlet weir 122. The wastewater is then treated in a downward flow mode using the autotrophic sulfur packing 200 to remove nitrates and nitrites. This autotrophic sulfur denitrification device employs a downward flow mode, ensuring effective contact between the wastewater and the autotrophic sulfur denitrification packing, resulting in better denitrification. Furthermore, the treated wastewater flows out from the clear water outlet 111 at the bottom of the autotrophic sulfur filter. The clear water outlet 111 is further connected to the clear water inlet 320 in the clear water tank 300. Therefore, the wastewater denitrified by the autotrophic sulfur packing 200 can be discharged from the clear water outlet 111 at the bottom of the autotrophic sulfur filter into the clear water tank 300 for further treatment in the next process stage, or used as backwash water for cleaning the autotrophic sulfur filter. The clear water tank of this application is located entirely below the upper end face of the sulfur autotrophic packing material, meaning the highest water level in the clear water tank is below the upper end face of the sulfur autotrophic packing material. Furthermore, an outlet regulating valve is installed between the clear water inlet of the clear water tank and the clear water outlet of the sulfur autotrophic filter. By adjusting the outlet regulating valve, the wastewater in the sulfur autotrophic filter can be positioned at different liquid levels, thereby adjusting the submersion height of the packing material and thus controlling the denitrification rate. For example, the top end face of the clear water tank is located below one-third of the height of the sulfur autotrophic packing material. This structure allows for a wider range of liquid level adjustment within the filter, thereby increasing the range of denitrification rate adjustment. Figure 2 As shown, Figure 2The top end face of the clear water tank is approximately located at one-fifth of the height of the sulfur autotrophic packing material. At this time, the liquid level in the filter tank can be adjusted within the range between one-fifth of the height of the sulfur autotrophic packing material and its top end face. It is understood that this example is only one implementation method. In some other embodiments, the top end face of the clear water tank may be located at other positions, such as the top end face of the clear water tank being located below the bottom end face of the sulfur autotrophic packing material.

[0036] In summary, the clear water outlet 111 of this application is located at the lower part of the sulfur autotrophic filter 200. This arrangement not only ensures effective denitrification of wastewater, but also allows for convenient adjustment of the submerged volume of the sulfur autotrophic filter 200 by regulating the wastewater level in the filter, thereby controlling the denitrification rate and further improving the denitrification effect. Furthermore, the overflow outlet 123 at the top of the sulfur autotrophic filter also serves as a safety protection and system stabilization mechanism. For example, when the liquid level in the filter exceeds the preset height, it can automatically drain through the overflow outlet 123, preventing a decrease in denitrification efficiency due to excessively high liquid levels.

[0037] For example, the overall shape of the sulfur autotrophic filter can be cuboid or cylindrical. In this case, the height dimension of the sulfur autotrophic filter is greater than its length and width dimensions. The height dimension of the sulfur autotrophic filter is... Figure 2 The vertical dimension in the text. In this embodiment, setting the shape of the sulfur autotrophic filter to square or cylindrical is only one example. In some other embodiments, the sulfur autotrophic filter may be in other shapes besides cylindrical or cuboid.

[0038] In some embodiments, the ratio of the volume of the sulfur autotrophic packing material 200 to the volume of the sulfur autotrophic filter can range from 1:2 to 4:5. This embodiment limits the ratio of the volume of the sulfur autotrophic packing material 200 to the volume of the sulfur autotrophic filter to ensure that the height of the sulfur autotrophic packing material 200 in the sulfur autotrophic filter meets the requirements of the sewage in the filter for the submersion height of the packing material, thereby ensuring a better denitrification effect. For example, when the sulfur autotrophic filter is a cylindrical filter, a volume ratio of 1:2 between the sulfur autotrophic packing material 200 and the volume of the sulfur autotrophic filter indicates that the distance between the upper surface of the sulfur autotrophic packing material 200 and the wastewater inlet 121 is equal to the height of the sulfur autotrophic packing material 200. Similarly, a volume ratio of 4:5 between the sulfur autotrophic packing material 200 and the volume of the sulfur autotrophic filter indicates that the distance between the upper surface of the sulfur autotrophic packing material 200 and the wastewater inlet 121 is one-quarter of the height of the sulfur autotrophic packing material 200. In this embodiment, limiting the volume ratio of the sulfur autotrophic packing material 200 to the volume of the sulfur autotrophic filter to 1:2 to 4:5 is merely an example to ensure that the immersion requirement of the sulfur autotrophic packing material 200 is met when the wastewater level in the sulfur autotrophic filter changes.

[0039] In some embodiments of this utility model, the sulfur autotrophic filter includes a first section 110 and a second section 120. The top end of the first section 110 and the bottom end of the second section 120 are both provided with flanges 130. The flanges 130 of the first section 110 and the flanges 130 of the second section 120 are detachably connected. In this embodiment, the sulfur autotrophic filter can be composed of a first section 110 and a second section 120. The two separate sections of the sulfur autotrophic filter can be further connected into one unit by screws or bolts. The segmented structure of the sulfur autotrophic filter in this embodiment facilitates the transportation of the sulfur autotrophic denitrification device and allows for adaptive adjustment of the height of the sulfur autotrophic filter. For example, a third section can be provided between the first section 110 and the second section 120. At this time, both ends of the third section are provided with flanges 130. In order to assemble the first section 110, the second section 120 and the third section into one unit, the flanges 130 at both ends of the third section can be directly connected to the flanges 130 of the first section 110 and the second section 120, respectively.

[0040] Furthermore, to ensure the sealing at the connection between the two connected tank sections, the sulfur autotrophic filter includes a sealing component located between the flange 130 of the first tank section 110 and the flange 130 of the second tank section 120. For example, the sealing component may be a sealing ring, a gasket, or a sealant encapsulated at the connection point.

[0041] In some embodiments of this utility model, the sulfur autotrophic denitrification device includes a wastewater inlet pump 410 and a wastewater inlet pipe 420. Both the wastewater inlet pump 410 and the wastewater inlet pipe 420 are located outside the sulfur autotrophic filter. The wastewater inlet 121 is connected to the output end of the wastewater inlet pump through the wastewater inlet pipe 420. Figure 2As shown, the sewage inlet pipe 420 and the sewage inlet pump are both located on the left side of the sulfur autotrophic filter. At this time, the sewage inlet pump transports the sewage generated or transported in the previous process through the sewage inlet pipe 420 to the sewage inlet 121 at the top of the sulfur autotrophic filter, and further enters the filter through the inlet weir 122. Furthermore, the sulfur autotrophic denitrification device includes a flow meter 421 and an inlet regulating valve 422, both of which are installed on the sewage inlet pipe 420. In this embodiment, the flow meter 421 can be specifically installed at the front end of the inlet regulating valve 422, that is, the flow meter 421 is located between the inlet regulating valve 422 and the sewage inlet pump. The flow meter 421 is used to monitor the flow rate of sewage flowing through the sewage inlet pipe 420, and the inlet regulating valve 422 is used to control the flow rate of sewage in the sewage inlet pipe 420. In this embodiment, the amount of sewage in the sulfur autotrophic filter can be adjusted by the interaction of the flow meter 421, the inlet regulating valve 422, and the outlet regulating valve, thereby controlling the immersion height of the packing material in the sewage and thus adjusting the amount of nitrogen removal. In addition, in some scenarios, the amount of nitrogen removal can also be adjusted by simply adjusting the valve size of the outlet regulating valve. To facilitate monitoring of the wastewater level in the autotrophic sulfur filter, the autotrophic sulfur denitrification device may further include a level gauge 124, which is located at the top inside the autotrophic sulfur filter. In this embodiment, the level gauge 124 monitors the water level inside the autotrophic sulfur filter, and, in conjunction with the flow meter on the wastewater inlet pipe 420, the inlet regulating valve 422, and the outlet regulating valve on the wastewater outlet pipe, the water level in the autotrophic sulfur filter can be precisely controlled, thereby adjusting the submersion height of the packing material and ensuring the controllability of the denitrification rate.

[0042] In another embodiment, the clean water outlet 111 and the clean water inlet 320 are connected by a clean water outlet pipe 510, and the water outlet regulating valve 511 is disposed on the clean water outlet pipe 510. Figure 2 As shown, the clear water tank 300 is located on the right side of the sulfur autotrophic filter. At this time, the clear water outlet 111 is located at the lower left end of the sulfur autotrophic filter. In this embodiment, a water outlet regulating valve 511 is further installed on the clear water outlet pipe 510, so the liquid level in the sulfur autotrophic filter can be controlled by adjusting the water flow.

[0043] Furthermore, the backwash outlet 310 and the backwash inlet 112 are connected by a backwash water pipe 521. The sulfur autotrophic denitrification device includes a backwash water pump 522, which is located between the backwash outlet 310 and the backwash water pipe 521. In this embodiment, the input end of the backwash water pump 522 is connected to the clear water tank 300, and the output end of the backwash water pump 522 is connected to the backwash water pipe 521. At this time, the backwash water pump 522 transports the clear water in the clear water tank 300 to the bottom of the sulfur autotrophic filter through the backwash water pipe 521 to complete the liquid backwashing of the sulfur autotrophic filter.

[0044] To further improve the backwashing efficiency of the sulfur autotrophic filter, the sulfur autotrophic denitrification device includes a backwash blower 531 and a backwash inlet pipe 532. The bottom end of the sulfur autotrophic filter has a backwash inlet, which is connected to the output end of the backwash blower 531 through the backwash inlet pipe 532. In this embodiment, the backwash blower 531, through the backwash inlet pipe 532, can deliver purge gas to the bottom end of the sulfur autotrophic filter to complete the gas backwashing of the filter.

[0045] In some other embodiments, the sulfur autotrophic denitrification device may also include a controller, which may be connected to a level gauge 124, a flow meter 421, an inlet regulating valve 422, and an outlet regulating valve 511. The controller can adjust the valve sizes of the inlet regulating valve 422 and the outlet regulating valve 511 based on the liquid level in the sulfur autotrophic filter monitored by the level gauge 124 and the wastewater flow rate in the wastewater inlet pipe 420 monitored by the flow meter 421. Additionally, in some embodiments, a total nitrogen detector 125 may be installed at the top of the sulfur autotrophic filter to detect the nitrogen content of the wastewater in the sulfur autotrophic filter.

[0046] As can be seen from the above embodiments, the sulfur autotrophic denitrification device with adjustable denitrification capacity of this application includes a sulfur autotrophic filter, a sulfur autotrophic packing material, and a clear water tank. The top of the sulfur autotrophic filter is provided with a sewage inlet, an inlet weir, and an overflow outlet, and the bottom is provided with a clear water outlet and a backwash inlet. The sulfur autotrophic packing material is located in the sulfur autotrophic filter, with its upper end face located at the bottom of the inlet weir and its lower end face located at the top of the clear water outlet and the backwash inlet. This sulfur autotrophic denitrification device adopts a top-inlet and bottom-outlet structure, that is, the sewage flows through the sulfur autotrophic packing material in a downward flow mode. Thus, the sulfur autotrophic denitrification device can adjust the immersion height of the packing material by controlling the liquid level in the sulfur autotrophic filter, thereby achieving convenient adjustment of the denitrification capacity. The clear water outlet of this structure is located below the sulfur autotrophic packing material, which can ensure effective denitrification of the sewage and improve the denitrification effect.

[0047] In this invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or in place of features of other embodiments.

[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. For those skilled in the art, various modifications and variations can be made to the embodiments of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sulfur autotrophic denitrification device with adjustable nitrogen removal capacity, characterized in that, The sulfur autotrophic denitrification device includes: The sulfur autotrophic filter has a sewage inlet, an inlet weir, and an overflow outlet at the top, and a clean water outlet and a backwash inlet at the bottom. The overflow outlet is located at the top of the inlet weir, and the sewage inlet corresponds to the inlet weir. A sulfur self-growth packing material is located inside the sulfur self-growth filter tank. The upper end face of the sulfur self-growth packing material is located at the bottom of the inlet weir, and the lower end face of the sulfur self-growth packing material is located at the top of the clear water outlet and the backwash inlet. A clear water tank is located outside the sulfur self-growth filter tank. The clear water tank is equipped with a backwash outlet and a clear water inlet. The clear water inlet and the backwash outlet are respectively connected to the clear water outlet and the backwash inlet. The clear water tank is located below the upper end face of the sulfur self-growth packing material, and an outlet regulating valve is provided between the clear water inlet and the clear water outlet.

2. The sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to claim 1, characterized in that, The ratio of the volume of the sulfur autotrophic packing material to the volume of the sulfur autotrophic filter is in the range of 1:2 to 4:5; and / or, The top end face of the clear water tank is located below one-third of the height of the sulfur self-growth packing.

3. The sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to claim 1, characterized in that, The sulfur autotrophic filter includes a first section and a second section. Both the top end of the first section and the bottom end of the second section are provided with flanges, and the flanges of the first section and the second section are detachably connected.

4. The sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to claim 3, characterized in that, The sulfur autotrophic filter includes a sealing component located between the flange of the first section of the filter body and the flange of the second section of the filter body.

5. The sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to claim 1, characterized in that, The sulfur autotrophic denitrification device includes a sewage inlet pump and a sewage inlet pipe, both of which are located outside the sulfur autotrophic filter. The sewage inlet is connected to the output end of the sewage inlet pump through the sewage inlet pipe.

6. The sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to claim 5, characterized in that, The sulfur autotrophic denitrification device includes a level gauge, which is installed at the top inside the sulfur autotrophic filter tank and is used to monitor the water level inside the sulfur autotrophic filter tank.

7. The sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to claim 6, characterized in that, The sulfur autotrophic denitrification device includes a flow meter and an inlet regulating valve, both of which are installed on the sewage inlet pipe.

8. The sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to claim 7, characterized in that, The clean water outlet and the clean water inlet are connected by a clean water outlet pipe, and the water outlet regulating valve is installed on the clean water outlet pipe.

9. The sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to claim 1, characterized in that, The backwash outlet and the backwash inlet are connected by a backwash water pipe. The sulfur autotrophic denitrification device includes a backwash water pump, and the backwash water pump is located between the backwash outlet and the backwash water pipe.

10. The sulfur autotrophic denitrification device with adjustable nitrogen removal capacity according to claim 1, characterized in that, The sulfur autotrophic denitrification device includes a backwash fan and a backwash inlet pipe. The bottom of the sulfur autotrophic filter has a backwash inlet, which is connected to the output end of the backwash fan through the backwash inlet pipe.

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