Integrated nitrification and denitrification biochemical pool

Abstract

The utility model discloses an integrated nitrification and denitrification biochemical pool, which comprises a reaction unit, the reaction unit comprises a biochemical pool and a partition plate vertically fixed in the center inside the biochemical pool, the partition plate divides the biochemical pool into a nitrification area and a denitrification area, one side of the biochemical pool is fixedly communicated with a drainage pipe, a valve is sleeved on the drainage pipe, and the valve is communicated with the nitrification area and the denitrification area. The reaction unit further comprises a water supply assembly used for conveying sewage in the nitrification area to the denitrification area and a depth-adjustable aeration unit arranged in the nitrification area of the biochemical pool, the depth-adjustable aeration unit comprises an aeration part and a driving part, and the aeration part is used for aerating the nitrification area. According to the utility model, the sewage can be nitrified and denitrified in the biochemical pool, and during nitrification, the driving part can drive the aeration part to adjust the aeration range according to the water volume, so that the aeration range covers the whole water body, and the increase of useless aeration power consumption at a low water level is reduced.

Description

Technical Field

[0001] This utility model relates to the field of biological treatment tank technology, and in particular to an integrated nitrification and denitrification biological treatment tank. Background Technology

[0002] Nitrification refers to the conversion of ammonia nitrogen into nitrate, while denitrification refers to the conversion of nitrate into nitrogen gas for release. Biological tanks are used to allow nitrification and denitrification to proceed simultaneously or alternately in the same reaction tank or system to efficiently complete biological treatment. By optimizing the microbial environment and process conditions, efficient removal of nitrogen pollutants is achieved, simplifying the process flow and reducing operating costs.

[0003] During the nitrification stage, oxygen needs to be supplied to the tank through an aeration system to form an aerobic zone. However, when the water volume and depth in the tank change, since the aeration pipes are usually fixedly distributed at the bottom of the tank, when the water volume is low, some aeration pipes may be too close to the water surface, causing the bubbles to stay for too short a time during their ascent and escape from the water surface before fully dissolving. This results in a decrease in oxygen utilization. Furthermore, the gas-liquid contact time is insufficient during shallow aeration, leading to a significant decrease in oxygen mass transfer efficiency. In addition, it also leads to an unnecessary increase in aeration energy consumption, thereby increasing the operating cost of the equipment. Therefore, an integrated nitrification and denitrification biological tank is proposed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the above-mentioned integrated nitrification and denitrification biological tanks, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide an integrated nitrification and denitrification biological tank, which is suitable for solving the problem that when the water volume in the tank is small, some aeration pipes may be too close to the water surface, causing the bubbles to stay for too short a time during the rising process and escape from the water surface before fully dissolving. This not only reduces the oxygen utilization rate, but also leads to the waste power consumption of aeration.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an integrated nitrification and denitrification biological treatment tank, comprising:

[0008] The reaction unit includes a biological tank and a partition plate vertically fixed to its interior center. The partition plate divides the biological tank into a nitrification zone and a denitrification zone. A drain pipe is fixedly connected to one side of the biological tank. A valve is fitted on the drain pipe. The reaction unit also includes a water supply component for transporting wastewater from the nitrification zone to the denitrification zone.

[0009] A depth-adjustable aeration unit is installed in the nitrification zone of a biological treatment tank. The depth-adjustable aeration unit includes an aeration section and a drive section. The aeration section is used to aerate the nitrification zone, and the drive section is used to adjust the aeration range of the aeration section according to the water volume.

[0010] An agitation unit is installed in the biological treatment tank to prevent sludge from settling in the denitrification zone.

[0011] As a preferred embodiment of the integrated nitrification and denitrification biological tank of this utility model, the water supply component includes a U-shaped pipe fixedly connected to the bottom of one side of the biological tank. The two ends of the U-shaped pipe are respectively connected to the nitrification zone and the denitrification zone. Both ends of the U-shaped pipe are fitted with electrically controlled valves, and a water pump is fitted on the U-shaped pipe.

[0012] As a preferred embodiment of the integrated nitrification and denitrification biological tank of this utility model, the aeration section includes multiple aeration pipes horizontally stacked and distributed in the nitrification zone of the biological tank. Adjacent aeration pipes are fixedly connected to each other through multiple telescopic pipes. The bottommost aeration pipe is fixedly connected to an air supply pipe, one end of which extends to the outside of the biological tank.

[0013] As a preferred embodiment of the integrated nitrification and denitrification biological tank of this utility model, the aeration section further includes multiple fixing plates, each of which is fixedly sleeved on the bottommost aeration pipe and fixed to the bottom of the inner cavity of the biological tank.

[0014] As a preferred embodiment of the integrated nitrification and denitrification biological tank of this utility model, the driving unit includes a perforated plate fixedly connected to the top of the biological tank, a screw motor fixedly installed on the top of the perforated plate, a connecting plate fixedly connected to the wall of the aeration pipe at the topmost point, and the output shaft of the screw motor passing through the connecting plate and threadedly connected to the connecting plate.

[0015] As a preferred embodiment of the integrated nitrification and denitrification biochemical tank of this utility model, a liquid level sensor is fixedly connected to the inner wall of the biochemical tank in the nitrification zone, and the sensor probe of the liquid level sensor extends to the bottom of the biochemical tank.

[0016] As a preferred embodiment of the integrated nitrification and denitrification biological tank of this utility model, the stirring unit includes a perforated plate two fixedly connected to the top of the denitrification zone of the biological tank, a servo motor fixedly connected to the top of the perforated plate two, and a stirring rod located in the denitrification zone fixedly connected to the output shaft of the servo motor.

[0017] As a preferred embodiment of the integrated nitrification and denitrification biochemical tank of this utility model, the stirring blades on the stirring rod are inclined, and multiple arc-shaped guide plates located in the denitrification zone are fixedly connected to the inner wall of the biochemical tank. The multiple guide plates are vertically and evenly distributed at the diagonal of the inner cavity of the biochemical tank.

[0018] The beneficial effects of this invention are as follows: the biological treatment tank can perform nitrification and denitrification of wastewater. During nitrification, the drive unit will drive the aeration unit to adjust the aeration range according to the water volume, thereby ensuring that the aeration range covers the entire water body and reducing the increase of useless power consumption for aeration at low water levels. The stirring unit can prevent sludge sedimentation during the denitrification process, thereby ensuring that the denitrifying bacteria and wastewater are in full contact. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a schematic diagram of the overall structure of the integrated nitrification and denitrification biological tank proposed in this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the biochemical tank proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the aeration section structure proposed in this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Reaction unit; 101. Biochemical tank; 102. Baffle; 103. Drainage pipe;

[0025] 104. Water supply components; 104a. U-shaped pipe; 104b. Electrically controlled valve; 104c. Water pump;

[0026] 200. Depth-adjustable aeration unit;

[0027] 201, Aeration section; 201a, Aeration pipe; 201b, Telescopic pipe; 201c, Air supply pipe; 201d, Fixing plate;

[0028] 202. Drive unit; 202a. Hollow plate 1; 202b. Lead screw motor; 202c. Connecting plate; 203. Liquid level sensor;

[0029] 300. Stirring unit; 301. Hollow plate 2; 302. Servo motor; 303. Stirring rod; 304. Guide plate. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0033] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0034] Example 1

[0035] Reference Figures 1-3 The first embodiment of this utility model provides an integrated nitrification and denitrification biological tank, which can adjust the aeration range according to the water volume, thereby ensuring that the aeration range covers the entire water body and reducing the increase of useless power consumption for aeration at low water levels. It includes: a reaction unit 100, a depth-adjustable aeration unit 200, and an agitation unit 300.

[0036] The reaction unit 100 includes a biological tank 101 and a partition plate 102 vertically fixed to its internal center. The partition plate 102 divides the biological tank 101 into a nitrification zone and a denitrification zone. A drain pipe 103 is fixedly connected to one side of the biological tank 101. A valve is fitted on the drain pipe 103. The reaction unit 100 also includes a water supply component 104 for transporting wastewater in the nitrification zone to the denitrification zone.

[0037] A depth-adjustable aeration unit 200 is installed in the nitrification zone of the biological treatment tank 101. The depth-adjustable aeration unit 200 includes an aeration section 201 and a drive section 202. The aeration section 201 is used to aerate the nitrification zone, and the drive section 202 is used to adjust the aeration range of the aeration section 201 according to the water volume.

[0038] The stirring unit 300 installed in the biological treatment tank 101 is used to prevent sludge from settling in the denitrification zone.

[0039] The left side of the biological treatment tank 101 is the nitrification zone, and the right side is the denitrification zone. Wastewater enters the nitrification zone on one side of the partition plate 102, and then the aeration section 201 of the depth-adjustable aeration unit 200 aerates the nitrification zone. The drive unit 202 adjusts the aeration range of the aeration section 201 according to the water volume. When the water level rises, the aeration section 201 moves upward to increase the aeration range and aerate the wastewater over a wide area. When the water level drops, the aeration section 201 moves downward to ensure that the aeration section 201 does not... The aeration unit 201 is located close to the water surface and can reduce the power consumption of the aeration unit 201 to aerate a small amount of water. This allows nitrifying bacteria to oxidize ammonia nitrogen into nitrate nitrogen. After the nitrification reaction is completed, the wastewater in the nitrification zone is transported to the denitrification zone through the water supply component 104. At the same time, the stirring unit 300 stirs the water in the denitrification zone to prevent sludge from settling. The denitrifying bacteria use a carbon source to reduce nitrate nitrogen into nitrogen gas to achieve denitrification. The treated wastewater is then discharged through the drain pipe 103 by opening the valve of the drain pipe 103.

[0040] Example 2

[0041] Reference Figure 1 This is the second embodiment of the present invention. Unlike the previous embodiment, the water supply component 104 includes a U-shaped pipe 104a fixedly connected to the bottom of one side of the biological tank 101. The two ends of the U-shaped pipe 104a are respectively connected to the nitrification zone and the denitrification zone. Both ends of the U-shaped pipe 104a are fitted with an electric control valve 104b, and a water pump 104c is fitted on the U-shaped pipe 104a.

[0042] The nitrification zone and denitrification zone of the biological treatment tank 101 are connected by a U-shaped pipe 104a. When it is necessary to transport the wastewater treated in the nitrification zone to the denitrification zone, the water pump 104c is started and the electric control valves 104b at both ends of the U-shaped pipe 104a are opened, so that the wastewater containing nitrate nitrogen in the nitrification zone flows into the denitrification zone through the U-shaped pipe 104a. After the wastewater in the nitrification zone has been transported, the electric control valve 104b is closed and the water pump 104c is stopped. In this way, the integration of nitrification and denitrification can be achieved in the biological treatment tank 101. After the nitrification zone is emptied, wastewater can be added back into the nitrification zone and aeration can be performed.

[0043] Example 3

[0044] Reference Figures 1-3 This is the third embodiment of the present invention. Unlike the previous embodiment, the aeration section 201 includes multiple aeration pipes 201a that are horizontally stacked and distributed in the nitrification zone of the biological tank 101. Adjacent aeration pipes 201a are fixedly connected to each other through multiple telescopic pipes 201b. The bottommost aeration pipe 201a is fixedly connected to an air supply pipe 201c, and one end of the air supply pipe 201c extends to the outside of the biological tank 101.

[0045] Multiple horizontally stacked aeration pipes 201a form an aeration network, which are interconnected by telescopic pipes 201b. The distance between the multiple aeration pipes 201a can be adjusted by the telescopic design of the telescopic pipes 201b. External air is introduced through the air supply pipe 201c and then evenly diffused into the wastewater in the nitrification zone of the biological treatment tank 101 through each layer of aeration pipes 201a. The drive unit 202 can drive the top aeration pipe 201a to rise and fall, so that the top aeration pipe 201a can pull the bottom aeration pipes 201a upward in sequence. The rising height of the top aeration pipe 201a is greater than that of the bottom aeration pipe 201a. Thus, when the water level is high, a large amount of gas is below the water body, while a relatively small amount of gas is near the top of the water body. The gas floating below replenishes the gas above, so as to ensure the overall aeration quality.

[0046] When the water level is low, the drive unit 202 drives the top aeration pipe 201a to descend, which shortens the interval between multiple aeration pipes 201a and folds them downwards, preventing the top aeration pipe 201a from getting close to the water surface and wasting gas. At this time, it can aerate the sewage evenly while reducing the gas supply power to the aeration pipe 201a, thereby reducing aeration energy consumption.

[0047] Specifically, the aeration section 201 also includes multiple fixing plates 201d, each fixing plate 201d being fixedly sleeved on the bottommost aeration pipe 201a, and each fixing plate 201d being fixed to the bottom of the inner cavity of the biological tank 101.

[0048] When the aeration pipe 201a is adjusted due to changes in water level, the fixing plate 201d can prevent the aeration pipe 201a from shaking or shifting, so as to ensure the structural stability of the aeration unit 201.

[0049] In addition, the drive unit 202 includes a perforated plate 202a fixedly connected to the top of the biochemical tank 101. A screw motor 202b is fixedly installed on the top of the perforated plate 202a. A connecting plate 202c is fixedly connected to the wall of the topmost aeration pipe 201a. The output shaft of the screw motor 202b passes through the connecting plate 202c and is threadedly connected to the connecting plate 202c.

[0050] The output shaft of the lead screw motor 202b passes through the cutout of the perforated plate 202a. When the lead screw motor 202b starts, its output shaft rotates, causing the connecting plate 202c to move up and down along the lead screw axis, thereby realizing the lifting and lowering adjustment of the entire aeration pipe 201a and changing the aeration depth.

[0051] Among them, a liquid level sensor 203 is fixedly connected to the inner wall of the nitrification zone of the biological tank 101, and the sensor probe of the liquid level sensor 203 extends to the bottom of the biological tank 101.

[0052] The probe of the liquid level sensor 203 extends to the bottom of the pool to monitor water level changes in real time. When the water level rises or falls, the liquid level sensor 203 feeds back the signal to the external control system. The control system starts the screw motor 202b according to the preset program, which drives the aeration pipe 201a group to make corresponding lifting and lowering adjustments, so that the aeration pipe 201a is always kept at a suitable aeration depth, which ensures that the water is fully aerated and avoids waste or insufficient aeration due to water level changes. The liquid level sensor 203 is a component known to those skilled in the art, and its structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0053] Example 4

[0054] Reference Figure 1 and Figure 2 This is the fourth embodiment of the present invention. Unlike the previous embodiment, the stirring unit 300 includes a perforated plate 301 fixedly connected to the top of the denitrification zone of the biochemical tank 101. A servo motor 302 is fixedly connected to the top of the perforated plate 301, and a stirring rod 303 located in the denitrification zone is fixedly connected to the output shaft of the servo motor 302.

[0055] The output shaft of the servo motor 302 passes through the hollow part of the perforated plate 301. After the servo motor 302 is started, its output shaft drives the stirring rod 303 to rotate in the denitrification zone to prevent sludge from settling in the denitrification zone.

[0056] In addition, the stirring blades on the stirring rod 303 are set at an angle, and multiple arc-shaped guide plates 304 located in the denitrification zone are fixedly connected to the inner wall of the biological tank 101. The multiple guide plates 304 are vertically and evenly distributed at the diagonal of the inner cavity of the biological tank 101.

[0057] During the rotation of the stirring rod 303, the inclined stirring blades can scoop up the sludge settled at the bottom of the tank to improve the stirring effect. The arc-shaped guide plates 304 distributed at the diagonal corners of the denitrification zone of the biological tank 101 are used to optimize the denitrification zone of the square cavity. This allows the wastewater to be guided by the guide plates 304 when passing through the diagonal corners of the denitrification zone, thereby eliminating dead corners in the water flow in the tank and ensuring that the sludge in the denitrification zone is fully mixed and in contact with the wastewater and carbon source.

[0058] During operation, wastewater is first discharged into the nitrification zone on the left side of the biological treatment tank 101. Then, the level sensor 203 monitors the water level in the nitrification zone in real time and feeds the data back to the external control system. The control system controls the screw motor 202b to operate according to the water level, which drives the top aeration pipe 201a to rise and fall. When the water level rises, the screw motor 202b drives the aeration pipe 201a to move upward. The spacing between the aeration pipes in each layer is adjusted through the telescopic pipe 201b to increase the aeration range. When the water level falls, the aeration pipe 201a moves downward to shorten the spacing, avoiding the aeration pipes from getting too close to the water surface and wasting gas. At the same time, the gas transmission power is reduced and energy consumption is reduced. During aeration, external air is introduced through the air transmission pipe 201c and evenly diffused into the wastewater through the aeration pipes 201a in each layer, providing sufficient dissolved oxygen for the nitrifying bacteria to oxidize ammonia nitrogen into nitrate nitrogen.

[0059] After the nitrification reaction is completed, the electrically controlled valves 104b at both ends of the U-shaped pipe 104a are opened, and the water pump 104c is started to transport the wastewater containing nitrate nitrogen in the nitrification zone to the denitrification zone through the U-shaped pipe 104a. When the wastewater in the nitrification zone has been transported, the electrically controlled valve 104b is closed and the water pump 104c is stopped. Then, the servo motor 302 drives the stirring rod 303 to rotate, and in conjunction with the guide plate 304, the sludge, wastewater and carbon source in the denitrification zone are fully mixed and contacted to reduce nitrate nitrogen to nitrogen gas, thereby achieving wastewater denitrification treatment. The treated wastewater is discharged from the denitrification zone through the drain pipe 103 by opening the valve on the drain pipe 103.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An integrated nitrification and denitrification biological treatment tank, characterized in that, include: The reaction unit (100) includes a biological tank (101) and a partition plate (102) vertically fixed to its interior center. The partition plate (102) divides the biological tank (101) into a nitrification zone and a denitrification zone. A drain pipe (103) is fixedly connected to one side of the biological tank (101). A valve is fitted on the drain pipe (103). The reaction unit (100) also includes a water supply assembly (104) for transporting wastewater from the nitrification zone to the denitrification zone. A depth-adjustable aeration unit (200) is installed in the nitrification zone of the biological treatment tank (101). The depth-adjustable aeration unit (200) includes an aeration section (201) and a drive section (202). The aeration section (201) is used to aerate the nitrification zone, and the drive section (202) is used to adjust the aeration range of the aeration section (201) according to the water volume. An agitation unit (300) is installed in the biological treatment tank (101) to prevent sludge from settling in the denitrification zone.

2. The integrated nitrification and denitrification biological treatment tank according to claim 1, characterized in that: The water supply assembly (104) includes a U-shaped pipe (104a) fixedly connected to the bottom of one side of the biological tank (101). The two ends of the U-shaped pipe (104a) are respectively connected to the nitrification zone and the denitrification zone. Both ends of the U-shaped pipe (104a) are fitted with an electric control valve (104b). A water pump (104c) is fitted on the U-shaped pipe (104a).

3. The integrated nitrification and denitrification biological treatment tank according to claim 2, characterized in that: The aeration section (201) includes multiple aeration pipes (201a) that are horizontally stacked and distributed in the nitrification zone of the biological tank (101). Adjacent aeration pipes (201a) are fixedly connected to each other through multiple telescopic pipes (201b). The bottommost aeration pipe (201a) is fixedly connected to an air supply pipe (201c). One end of the air supply pipe (201c) extends to the outside of the biological tank (101).

4. The integrated nitrification and denitrification biological treatment tank according to claim 3, characterized in that: The aeration section (201) also includes multiple fixing plates (201d), each fixing plate (201d) being fixedly sleeved on the bottommost aeration pipe (201a), and each fixing plate (201d) being fixed at the bottom of the inner cavity of the biological tank (101).

5. The integrated nitrification and denitrification biological treatment tank according to claim 4, characterized in that: The drive unit (202) includes a perforated plate (202a) fixedly connected to the top of the biochemical tank (101). A screw motor (202b) is fixedly installed on the top of the perforated plate (202a). A connecting plate (202c) is fixedly connected to the wall of the aeration pipe (201a) at the topmost point. The output shaft of the screw motor (202b) passes through the connecting plate (202c) and is threadedly connected to the connecting plate (202c).

6. The integrated nitrification and denitrification biological treatment tank according to claim 5, characterized in that: A liquid level sensor (203) is fixedly connected to the inner wall of the nitrification zone of the biochemical tank (101), and the sensor probe of the liquid level sensor (203) extends to the bottom of the biochemical tank (101).

7. The integrated nitrification and denitrification biological treatment tank according to claim 6, characterized in that: The stirring unit (300) includes a perforated plate two (301) fixedly connected to the top of the denitrification zone of the biological tank (101). A servo motor (302) is fixedly connected to the top of the perforated plate two (301), and a stirring rod (303) located in the denitrification zone is fixedly connected to the output shaft of the servo motor (302).

8. The integrated nitrification and denitrification biological treatment tank according to claim 7, characterized in that: The stirring blades on the stirring rod (303) are inclined, and multiple arc-shaped guide plates (304) located in the denitrification zone are fixedly connected to the inner wall of the biological tank (101). The multiple guide plates (304) are vertically and evenly distributed at the diagonal of the inner cavity of the biological tank (101).

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