Short-range biological denitrification reaction device

Abstract

The utility model relates to a short-range biological denitrification reaction device, which belongs to the technical field of water treatment equipment and comprises a reaction tank body, a water inlet pipe, a water outlet pipe, a baffle net and a material guide funnel, the inside of the reaction tank body is divided into a water outlet area, an oxidation area and an anaerobic area by the baffle net and the material guide funnel, and biological carrier fillers are arranged in the oxidation area and the anaerobic area. A liquid spraying driving stirring mechanism communicated with the water inlet pipe is arranged in the anaerobic zone, a liquid distribution disc is fixed in an outlet in the bottom of the material guide funnel, a plurality of aeration pipes are arranged in the liquid distribution disc, and a splayed flow guide plate is arranged above the material guide funnel. Water in the water inlet reaction tank can sequentially enter the anaerobic zone, the oxidation zone and the water outlet zone, treatment is more thorough, and water entering the oxidation zone from the anaerobic zone can be mixed with gas entering the aeration pipe in the liquid distribution disc, enters the space between the flow guide plates from the liquid outlet holes and is mixed with biological carrier filler to complete nitration reaction.

Description

Technical Field

[0001] This utility model relates to a short-range biological denitrification reaction device, belonging to the technical field of wastewater treatment equipment. Background Technology

[0002] In recent years, due to factors such as water source pollution, indirect water diversion, and open channel water conveyance, the water quality of some surface water sources has deteriorated, leading to the problem of slightly polluted water sources. The main pollutants are COD, nitrate, and ammonia nitrogen. Conventional treatment technologies for drinking water are effective in removing suspended solids, colloidal substances, and pathogenic microorganisms. However, for slightly polluted water bodies rich in dissolved substances and various complex organic matter, conventional treatment processes are difficult to effectively address the problem. Biological denitrification treatment can effectively treat such slightly polluted water bodies.

[0003] Current biological denitrification reactors include a reaction tank containing aeration pipes, inlet pipes, outlet pipes, biological carrier packing, and baffles. Nitrification occurs in an oxidation zone formed inside the baffles via the aeration pipes and inlet pipes, followed by denitrification as the water flows to the outside of the baffles. However, a significant portion of the water is discharged directly after the nitrification reaction in the oxidation zone, resulting in incomplete water treatment and affecting the overall water treatment effect. Utility Model Content

[0004] This invention provides a short-range biological denitrification reaction device, which solves the problems mentioned in the background technology.

[0005] This utility model relates to a short-range biological denitrification reactor, including a reaction tank. The lower part of the reaction tank has an inlet pipe, and the upper part has an outlet pipe. Inside the reaction tank, from top to bottom, there is a baffle and a material guide funnel. The baffle and the material guide funnel divide the reaction tank into an outlet zone, an oxidation zone, and an anaerobic zone. Both the oxidation and anaerobic zones contain biological carrier packing. The anaerobic zone has a spray-driven stirring mechanism connected to the inlet pipe. A liquid distribution plate is fixed inside the bottom outlet of the material guide funnel. The top of the liquid distribution plate has evenly distributed outlet holes, and multiple aeration pipes are located inside the liquid distribution plate. The bottom of the liquid distribution plate has an inlet connected to the anaerobic zone. Above the material guide funnel is a figure-eight shaped guide plate, with a gap between the bottom of the guide plate and the material guide funnel.

[0006] As a preferred embodiment, the baffle is a ring structure, with the outer side of the baffle fixed to the inner wall of the reaction vessel. An inverted conical guide cone is fixed in the inner hole of the baffle, and the outer wall of the guide cone has an arc-shaped cross-section, which can better guide the rising liquid and biological carrier packing. This facilitates the biological carrier packing being guided to the upper part of the guide plate, and then carried again to the upper position of the liquid distribution plate by part of the return liquid.

[0007] As a preferred option, the liquid outlet is inclined with the outside higher than the inside to prevent the liquid sprayed from the outlet from affecting the backflow of the biological carrier packing.

[0008] As a preferred embodiment, a blocking filter screen is fixed at the bottom inlet of the liquid distribution tray. The blocking filter screen has a downward convex structure to prevent the biological carrier packing material in the anaerobic zone from entering the bottom inlet of the liquid distribution tray. Furthermore, the downward convex structure of the blocking filter screen can prevent the biological carrier packing material from accumulating at the blocking filter screen.

[0009] As a preferred embodiment, the liquid-driven stirring mechanism includes a hollow disc with at least two arc-shaped guide tubes arranged in a circular array on its outer periphery. The outer ends of the guide tubes are provided with funnel-shaped flow-limiting tubes. A support column is rotatably installed in the inner hole of the hollow disc, and a bracket is fixed to the bottom of the support column. The bracket is fixed to the bottom of the reaction vessel, and the bottom of the support column is fixed to the water inlet pipe. The support column has a liquid channel connecting the hollow disc and the water inlet pipe. The reaction force of the liquid sprayed from the flow-limiting tube can be used to drive the guide tubes and the hollow disc to rotate, thereby stirring and mixing the liquid and biological carrier packing in the anaerobic zone.

[0010] As a preferred embodiment, a drain pipe is fixed on the bottom outer wall of the reaction vessel to facilitate the discharge of liquid from the reaction vessel when it is not in use for a long time. Valves are provided on the drain pipe, the inlet pipe and the outlet pipe.

[0011] This utility model has the following beneficial effects:

[0012] Water from the inlet reaction tank can sequentially enter the anaerobic zone, oxidation zone, and effluent zone for more thorough treatment. The anaerobic zone is equipped with a spray-driven stirring mechanism that can evenly mix the incoming raw water with the biological carrier packing material for better denitrification. Water entering the oxidation zone from the anaerobic zone can mix with the gas entering from the aeration pipe in the distribution plate, and then enter the space between the guide plates through the outlet hole to mix with the biological carrier packing material to complete the nitrification reaction. The biological carrier packing material can also flow back to the top of the distribution plate outside the guide plates to continue participating in the reaction. Attached Figure Description

[0013] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0014] The structures, proportions, sizes, etc. disclosed in this specification are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 for Figure 1 Partial structural diagram;

[0017] Figure 3 This is a schematic diagram of the top structure of the hollow disc;

[0018] In the diagram: 1. Inlet pipe; 2. Support bracket; 3. Support column; 4. Flow limiting pipe; 5. Barrier filter screen; 6. Reaction tank; 7. Liquid distribution plate; 8. Aeration pipe; 9. Feed funnel; 10. Guide plate; 11. Guide cone; 12. Outlet pipe; 13. Baffle screen; 14. Biological carrier packing material; 15. Hollow disc; 16. Guide pipe; 17. Drain pipe; 18. Liquid outlet hole. Detailed Implementation

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

[0020] Example 1, such as Figures 1 to 3 As shown, this utility model is a short-range biological denitrification reaction device, including a reaction tank 6. The lower part of the reaction tank 6 is provided with an inlet pipe 1, and the upper part of the reaction tank 6 is provided with an outlet pipe 12. The reaction tank 6 is provided with a baffle 13 and a material guide funnel 9 from top to bottom. The baffle 13 and the material guide funnel 9 divide the reaction tank 6 into an outlet zone, an oxidation zone and an anaerobic zone. Biological carrier packing material 14 is provided in both the oxidation zone and the anaerobic zone. The anaerobic zone is provided with a spray-driven stirring mechanism connected to the inlet pipe 1. A liquid distribution plate 7 is fixed in the bottom outlet of the material guide funnel 9. The top of the liquid distribution plate 7 is provided with evenly distributed liquid outlet holes 18. The liquid distribution plate 7 is provided with multiple aeration pipes 8. The bottom of the liquid distribution plate 7 is provided with a liquid inlet connected to the anaerobic zone. An eight-shaped guide plate 10 is provided above the material guide funnel 9. There is a gap between the bottom of the guide plate 10 and the material guide funnel 9. The biological carrier packing material 14 in the oxidation zone and anaerobic zone is filled with aerobic bacteria and anaerobic bacteria, respectively.

[0021] In use, the raw water to be treated enters the spray-driven stirring mechanism from the inlet pipe 1 and is sprayed out evenly, which drives the biological carrier packing 14 in the anaerobic zone to stir and mix, so that the raw water is evenly distributed in the anaerobic zone and undergoes denitrification reaction with the anaerobic bacteria on the biological carrier packing 14. Then, the water enters the distribution plate 7 from the liquid inlet at the bottom and mixes with the gas bursting upward from the aeration pipe 8. Then, it is sprayed out from the liquid outlet 18 and enters the oxidation zone. The force generated by the water and the force generated by the gas when the aeration pipe 8 supplies oxygen cause the water to move upward in the inner area of ​​the guide plate 10. At the same time, the aerobic bacteria in the biological carrier packing 14 in the oxidation zone undergo nitrification reaction with the water. Then, the water baffle 13 enters the water outlet area and is discharged from the water outlet pipe 12. The biological carrier packing 14 in the oxidation zone then flows back from the area outside the guide plate 10 to the top area of ​​the distribution plate 7 for recycling.

[0022] In Example 2, based on Example 1, the baffle 13 has an annular structure. The outer side of the baffle 13 is fixed to the inner wall of the reaction tank 6. An inverted conical guide cone 11 is fixed in the inner hole of the baffle 13. The outer wall of the guide cone 11 has an arc-shaped cross-section. When water and biological carrier packing 14 pass through the guide cone 11, they are guided to the outside by the guide cone 11. Then, some water enters the outlet area from the baffle 13, and some water flows against the biological carrier packing 14 to the area outside the guide plate 10 and flows back to the top area of ​​the liquid distribution plate 7 for recycling. The biological carrier packing 14 can be suspended in the water. The aeration pipe 8 is upward aeration.

[0023] The liquid outlet 18 is inclined with the outside higher than the inside.

[0024] A blocking filter 5 is fixed at the bottom liquid inlet of the liquid distribution plate 7. The blocking filter 5 has a downward convex structure.

[0025] The liquid-driven stirring mechanism includes a hollow disk 15. At least two arc-shaped guide pipes 16 are arranged in a circular array on the outer periphery of the hollow disk 15. A funnel-shaped flow-limiting pipe 4 is provided at the outer end of each guide pipe 16. A support column 3 is rotatably installed in the inner hole of the hollow disk 15. A bracket 2 is fixed to the bottom of the support column 3, which is fixed to the bottom of the reaction tank 6. The bottom of the support column 3 is fixed to the water inlet pipe 1. A liquid channel connecting the hollow disk 15 and the water inlet pipe 1 is provided inside the support column 3. Water entering through the water inlet pipe 1 enters the hollow disk 15 through the liquid channel, then passes through the guide pipes 16 and is sprayed out from the flow-limiting pipe 4. The reaction force of the liquid sprayed out at the flow-limiting pipe 4 drives the guide pipes 16 and the hollow disk 15 to rotate, thereby stirring and mixing the liquid and the biological carrier packing 14 in the anaerobic zone.

[0026] A drain pipe 17 is fixed on the bottom outer wall of the reaction vessel 6. Valves are provided on the drain pipe 17, the inlet pipe 1, and the outlet pipe 12.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0028] In the description of this utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A short-range biological denitrification reactor, comprising a reaction tank (6), an inlet pipe (1) at the lower part of the reaction tank (6), and an outlet pipe (12) at the upper part of the reaction tank (6), characterized in that: The reaction tank (6) is equipped with a baffle (13) and a feed funnel (9) from top to bottom. The baffle (13) and the feed funnel (9) divide the reaction tank (6) into an outlet zone, an oxidation zone and an anaerobic zone. Both the oxidation zone and the anaerobic zone are equipped with biological carrier packing (14). The anaerobic zone is equipped with a spray-driven stirring mechanism connected to the inlet pipe (1). The bottom outlet of the feed funnel (9) is fixed with a liquid distribution plate (7). The top of the liquid distribution plate (7) is evenly equipped with outlet holes (18). The liquid distribution plate (7) is equipped with multiple aeration pipes (8). The bottom of the liquid distribution plate (7) is equipped with an inlet connected to the anaerobic zone. The feed funnel (9) is equipped with a figure-eight shaped guide plate (10). There is a gap between the bottom of the guide plate (10) and the feed funnel (9).

2. The short-range biological denitrification reactor according to claim 1, characterized in that: The baffle (13) has a ring structure. The outer side of the baffle (13) is fixed on the inner wall of the reaction vessel (6). An inverted conical guide cone (11) is fixed in the inner hole of the baffle (13). The cross-section of the outer wall of the guide cone (11) is arc-shaped.

3. The short-range biological denitrification reactor according to claim 1, characterized in that: The liquid outlet (18) is inclined with the outside higher than the inside.

4. The short-range biological denitrification reactor according to claim 1, characterized in that: A blocking filter (5) is fixed at the bottom inlet of the liquid distribution plate (7). The blocking filter (5) has a downward convex structure.

5. A short-range biological denitrification reactor according to claim 1, characterized in that: The spray-driven stirring mechanism includes a hollow disc (15). There are at least two arc-shaped guide tubes (16) arranged in a circular array on the outer periphery of the hollow disc (15). The outer end of the guide tube (16) is provided with a funnel-shaped flow-limiting tube (4). A support column (3) is rotatably installed in the inner hole of the hollow disc (15). A bracket (2) is fixed at the bottom of the support column (3). The bracket (2) is fixed on the bottom of the reaction tank (6). The bottom of the support column (3) is fixed to the water inlet pipe (1). A liquid channel connecting the hollow disc (15) and the water inlet pipe (1) is provided inside the support column (3).

6. The short-range biological denitrification reactor according to claim 1, characterized in that: A drain pipe (17) is fixed on the bottom outer wall of the reaction vessel (6), and valves are provided on the drain pipe (17), the inlet pipe (1) and the outlet pipe (12).

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