Enhanced sewage denitrification equipment by endogenous denitrification

Abstract

The utility model discloses endogenous denitrification enhanced sewage denitrification equipment, and relates to the field of sewage treatment equipment. The device comprises a biological filter tank and a secondary sedimentation tank, a coagulation tank and a flocculation tank are arranged in the secondary sedimentation tank, a speed reducing mechanism is arranged on the inner side of the coagulation tank and comprises a plurality of clamping blocks, a clamping groove is formed between every two adjacent clamping blocks, and the clamping blocks are arranged in the clamping grooves. According to the utility model, through the speed reducing mechanism, the impact force of water flow entering the coagulating basin is effectively reduced, the speed reducing treatment enables the original high-speed and disordered water flow to become gentle and orderly, better conditions are provided for subsequent treatment, and meanwhile, the water flow is prevented from being blocked by the blocking plate. And the water body is orderly stirred only by the stirring fan blades, so that the sewage and the coagulant can be fully and uniformly mixed, alumen ustum is more effectively generated, and the workload of the subsequent guide cylinder in improving the reaction of the clot flocculating agent and the sewage is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of sewage treatment equipment, in particular to an endogenous denitrification enhanced sewage nitrogen removal equipment. Background Technique

[0002] The denitrifying deep bed filter is an advanced sewage treatment process, integrating biological nitrogen removal and physical filtration functions. It uses nitrifying bacteria and denitrifying bacteria to convert ammonia nitrogen in wastewater into nitrogen gas, while filtering suspended solids, effectively removing pollutants such as total nitrogen and total phosphorus. This process is particularly suitable for upgrading sewage treatment plants, with the advantages of concentrated functions, flexible operation, and stable and reliable effects. In practical applications, appropriate filter materials need to be selected, operation parameters optimized, and regular maintenance carried out to ensure its long-term stable operation and achieve the purpose of efficient sewage treatment.

[0003] In the current denitrification system, the application of the secondary sedimentation tank can effectively improve the purification speed of sewage. However, in actual operation, we found a key problem: when sewage enters the secondary sedimentation tank through the inlet pipe, although the stirring device can promote the full reaction of sewage with the coagulant to generate flocs, the kinetic energy carried by the sewage when flowing in and the subsequent stirring action will cause complex and chaotic eddies in the tank. This situation not only increases the workload of the anti-eddy guide cylinder in the subsequent flocculant addition tank, affecting the optimization of the reaction environment, but also weakens the actual utility of the secondary sedimentation tank. Content of the Utility Model

[0004] Based on this, the purpose of the utility model is to provide an endogenous denitrification enhanced sewage nitrogen removal equipment to solve the technical problem that the sewage flowing into the secondary sedimentation tank has a certain kinetic energy, and with the subsequent stirring effect, the eddies inside the sewage are relatively disordered, which aggravates the burden of the anti-eddy guide cylinder in the subsequent flocculant addition tank to improve the reaction environment.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an endogenous denitrification enhanced sewage nitrogen removal equipment, including a biological filter and a secondary sedimentation tank. The inside of the secondary sedimentation tank is provided with a coagulation tank and a flocculation tank. A deceleration mechanism is arranged inside the coagulation tank. The deceleration mechanism includes a plurality of clamping blocks, and a clamping groove is formed between adjacent clamping blocks. A first baffle, a second baffle, and a third baffle are sequentially arranged inside the plurality of clamping grooves. A plurality of first through holes are formed on the surface of the first baffle, a plurality of second through holes are formed on the surface of the second baffle, and a plurality of third through holes are formed on the surface of the third baffle.

[0006] By adopting the above technical solution, the deceleration effects of the first baffle, the second baffle and the third baffle are beneficial to effectively slow down the water flow impact when filling the coagulation tank, making the originally high-speed and disordered water flow become gentle and orderly, creating good conditions for subsequent treatment. At the same time, only relying on the stirring fan blades to stir the water body can ensure that the sewage and the coagulant are fully and orderly mixed to generate flocs.

[0007] Further, the aperture sizes of the first through hole, the second through hole and the third through hole gradually decrease.

[0008] By adopting the above technical solution, it is beneficial to gradually slow down the passing speed of the water flow. When the sewage flows through these through holes, the larger aperture allows more water flow to pass through, and as the aperture gradually decreases, the passing speed of the water flow also decreases accordingly.

[0009] Further, the first through hole, the second through hole and the third through hole are all arranged in an equidistant rectangular array.

[0010] By adopting the above technical solution, such a layout ensures that when the sewage flows through each baffle, it can pass through each through hole evenly. The equidistant arrangement ensures the uniform distribution of the water flow and avoids the situation of too fast or too slow local flow velocity.

[0011] Further, limiting blocks are arranged on both sides of the top of the first baffle, the second baffle and the third baffle.

[0012] By adopting the above technical solution, the limiting blocks ensure the stable position of these baffles in the card slots. The limiting blocks can prevent the baffles from shifting or tilting when being impacted by the water flow, thus maintaining the overall stability of the deceleration mechanism.

[0013] Further, stirring fan blades are arranged inside the coagulation tank, and a guide cylinder is arranged inside the flocculation tank. The guide cylinder is used to smooth the rapids and provide a stable environment for the flocculation process.

[0014] By adopting the above technical solution, the stirring fan blades can effectively stir the water body to ensure the full mixing of the sewage and the coagulant, thereby improving the coagulation effect. This stirring effect helps the tiny particles in the sewage to aggregate into larger flocs, laying a good foundation for subsequent precipitation and filtration.

[0015] Further, a water inlet pipe and a backwash outlet pipe are arranged on one side of the biological filter tank, and a drain pipe is arranged on the other side of the biological filter tank.

[0016] By adopting the above technical solution, it is convenient to introduce the sewage to be treated into the biological filter tank, and the backwash outlet pipe is used to backwash the biological filter tank when needed to maintain the filtering effect and performance of the filter tank, making the introduction of sewage and the maintenance of the filter tank simple and efficient.

[0017] Furthermore, a connecting pipe is connected between the biological filter tank and the secondary sedimentation tank, and a backwashing pump and a backwashing inlet valve are arranged on the connecting pipe.

[0018] By adopting the above technical solution, the backwashing pump and the backwashing inlet valve arranged on the connecting pipe facilitate the maintenance and cleaning of the system. The backwashing pump can be used to backwash the biological filter tank when necessary to remove the blocked impurities and maintain the permeability of the filter tank.

[0019] Furthermore, a backwashing fan is arranged on the front side of the biological filter tank, and the output end of the backwashing fan is connected to the biological filter tank through a pipeline.

[0020] By adopting the above technical solution, the backwashing fan can provide a strong air flow to backwash the biological filter tank regularly. This kind of backwashing can remove the blockages on the filter media, restore the filtering performance of the biological filter tank, and ensure its continuous and effective removal of impurities in the sewage.

[0021] In summary, the main beneficial effects of the present utility model are as follows:

[0022] Through the first baffle, the second baffle and the third baffle, the present utility model effectively slows down the water flow impact entering the coagulation tank. This deceleration treatment makes the originally high-speed and disordered water flow become gentle and orderly, providing better conditions for subsequent treatment. At the same time, only relying on the stirring fan blades to stir the water body orderly ensures that the sewage and the coagulant can be fully and evenly mixed, thus generating alum flowers more effectively. During this process, due to the stability of the water flow, the working burden of the subsequent draft tube in improving the reaction between the coagulant and the sewage is greatly reduced. Therefore, the sewage treatment effect and treatment rate of the whole system are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0024] Figure 2 is a structural schematic diagram of the present utility model;

[0025] Figure 3 is an exploded structural schematic diagram of the first baffle, the second baffle and the third baffle of the present utility model;

[0026] Figure 4 is the present utility model Figure 2 The enlarged structural schematic diagram at A in.

[0027] In the figure: 1. Biological filter; 2. Secondary sedimentation tank; 301. Inlet pipe; 302. Drain pipe; 303. Backwashing pump; 304. Connecting pipe; 305. Backwashing inlet valve; 306. Backwashing outlet pipe; 4. Backwashing fan; 501. Coagulation tank; 502. Flocculation tank; 503. Draft tube; 504. Stirring fan blade; 6. Reduction mechanism; 601. Block; 602. Slot; 603. First baffle; 604. Second baffle; 605. Third baffle; 606. First through hole; 607. Second through hole; 608. Third through hole; 609. Limiting block. Specific implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection: it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0032] Embodiment 1:

[0033] The endogenous denitrification enhanced sewage nitrogen removal equipment, such as Figures 1-4As shown in the figure, it includes a biological filter tank 1 and a secondary sedimentation tank 2. Inside the secondary sedimentation tank 2, there are a coagulation tank 501 and a flocculation tank 502. A deceleration mechanism 6 is arranged inside the coagulation tank 501. The deceleration mechanism 6 includes a plurality of clamping blocks 601, and a clamping groove 602 is formed between adjacent clamping blocks 601. Inside the plurality of clamping grooves 602, a first baffle 603, a second baffle 604, and a third baffle 605 are sequentially arranged. A plurality of first through holes 606 are formed on the surface of the first baffle 603, a plurality of second through holes 607 are formed on the surface of the second baffle 604, and a plurality of third through holes 608 are formed on the surface of the third baffle 605. The deceleration effect of the first baffle 603, the second baffle 604, and the third baffle 605 is beneficial to effectively slow down the water flow impact charged into the coagulation tank 501, making the originally high-speed and disordered water flow become gentle and orderly, creating good conditions for subsequent treatment. At the same time, only relying on the stirring fan blades 504 to stir the water body can ensure that the sewage and the coagulant are fully and orderly mixed to generate alum flowers. During this process, since the water flow impact has been effectively regulated by the deceleration mechanism, when alum flowers are generated in the sewage, the orderly state of the rapids can be maintained. Such a treatment process not only reduces the working burden of the subsequent draft tube 503 in improving the reaction between the coagulated mass coagulant and the sewage, but also significantly improves the sewage treatment effect and treatment rate.

[0034] Refer to Figure 3 , the aperture sizes of the first through hole 606, the second through hole 607, and the third through hole 608 gradually decrease, which is beneficial to gradually slow down the passing speed of the water flow. When the sewage flows through these through holes, a larger aperture allows more water flow to pass through, and as the aperture gradually decreases, the passing speed of the water flow also decreases accordingly. At the same time, the gradually decreasing aperture also means that at each baffle, the sewage will experience an adjustment of the flow rate, which helps to more smoothly guide the water flow to the next treatment link. In this way, the equipment can more effectively control the flow state of the sewage, provide stable conditions for subsequent treatment, and thus improve the efficiency and quality of sewage treatment.

[0035] Refer to Figure 3 , the first through hole 606, the second through hole 607, and the third through hole 608 are all arranged in an equidistant rectangular array. Such a layout ensures that when the sewage flows through each baffle, it can evenly pass through each through hole. The equidistant arrangement ensures the uniform distribution of the water flow, avoiding the situation of too fast or too slow local flow rates. At the same time, the rectangular array arrangement makes each through hole have the same spatial position relationship, which helps to maintain the stability and consistency of the water flow, not only improving the uniformity of sewage treatment, but also reducing the turbulence and dead corners in the treatment process, thus enhancing the overall treatment effect.

[0036] Refer to Figure 3 、 Figure 4, on both sides of the top of the first baffle 603, the second baffle 604 and the third baffle 605, there are limit blocks 609. The limit blocks 609 ensure the stable position of these baffles in the card slots 602. The limit blocks 609 can prevent the baffles from shifting or tilting when affected by water flow impact, thus maintaining the overall stability of the deceleration mechanism 6. At the same time, through the fixing effect of the limit blocks 609, the relative positions between the baffles can be kept unchanged, ensuring that when the sewage flows through each baffle, it can flow along the designed water flow path. This is conducive to achieving uniform deceleration and smooth transition of the water flow, and further improving the efficiency and effect of sewage treatment.

[0037] Refer to Figure 1 , Figure 2 , inside the coagulation tank 501, there are stirring fan blades 504, and inside the flocculation tank 502, there is a draft tube 503. The draft tube 503 is used to smooth the rapid current and provide a stable environment for the flocculation process. The stirring fan blades 504 can effectively agitate the water body to ensure the full mixing of the sewage and the coagulant, thereby improving the coagulation effect. This stirring effect helps the tiny particles in the sewage to aggregate into larger flocs, laying a good foundation for subsequent sedimentation and filtration. At the same time, the draft tube 503 inside the flocculation tank 502 can smooth the rapid current and provide a stable environment for the flocculation process. The draft tube 503 makes the water flow form an orderly flow in the flocculation tank, reducing the water flow disorder, which is conducive to the uniform distribution of the flocculant and the effective combination with the particles in the sewage.

[0038] Embodiment 2:

[0039] Refer to Figure 1 , Figure 2 , on one side of the biological filter 1, there are an influent pipe 301 and a backwash outlet pipe 306, and on the other side of the biological filter 1, there is a drain pipe 302. It can conveniently introduce the sewage to be treated into the biological filter 1, while the backwash outlet pipe 306 is used to backwash the biological filter when needed to maintain the filtration effect and performance of the filter, making the introduction of sewage and the maintenance of the filter simple and efficient. At the same time, the drain pipe 302 arranged on the other side of the biological filter 1 can smoothly discharge the sewage preliminarily filtered by the biological filter and enter the next treatment link. This layout ensures the continuity and smoothness of sewage treatment and improves the overall treatment efficiency.

[0040] Refer to Figure 1 , Figure 2, a communicating pipe 304 is connected between the biological filter tank 1 and the secondary sedimentation tank 2. An anti-suction pump 303 and an anti-washing inlet valve 305 are arranged on the communicating pipe 304. The anti-suction pump 303 and the anti-washing inlet valve 305 arranged on the communicating pipe 304 facilitate the maintenance and cleaning of the system. The anti-suction pump 303 can be used to backwash the biological filter tank 1 when necessary to remove the blocked impurities and maintain the permeability of the filter tank. The anti-washing inlet valve 305 is used to control the entry of the backwashing water, which not only extends the service life of the biological filter tank 1 but also improves the stability and efficiency of the entire sewage treatment system.

[0041] Refer to Figure 1 , Figure 2 , an anti-washing fan 4 is arranged on the front side of the biological filter tank 1. The output end of the anti-washing fan 4 is connected to the biological filter tank 1 through a pipeline. The anti-washing fan 4 can provide a strong air flow to backwash the biological filter tank regularly. This kind of backwashing can remove the blockages on the filter media, restore the filtering performance of the biological filter tank, and ensure its continuous and effective removal of impurities in the sewage. At the same time, the output end of the anti-washing fan 4 is directly connected to the biological filter tank 1 through a pipeline, making the backwashing process more efficient and convenient. The strong air flow can directly act on the filter media to effectively remove the accumulated dirt, thereby extending the service life of the biological filter tank 1 and improving the efficiency and quality of sewage treatment.

[0042] The implementation principle of the present utility model is as follows: First, the sewage filtered by the biological filter tank 1 flows through the drain pipe 302 into the interior of the secondary sedimentation tank 2. The sewage first impacts the first baffle 603, and the initial impact force of the water flow is decelerated by using the first baffle 603, the second baffle 604, and the third baffle 605, so that the high-speed water flow becomes gentle and quickly moves downward. Subsequently, it is stirred by the stirring fan blades 504 below and reacts with the coagulant added inside to produce flocs. In this process, it is beneficial to decelerate the impact force of the water flow filled into the coagulation tank 501 through the first baffle 603, the second baffle 604, and the third baffle 605, and only rely on the stirring fan blades 504 to stir the water body, so that the rapids are in an orderly state during the process of the sewage producing flocs, thereby reducing the working burden of the subsequent draft tube 503 to improve the reaction of the flocculant with the sewage, and enhancing its sewage treatment effect and treatment rate.

[0043] Parts not involved in the present utility model are the same as or can be implemented by using the prior art, and will not be elaborated here too much.

[0044] Although embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model and not limitations thereof. The specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions, and variations that do not contribute creatively to the embodiments as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. Endogenous denitrification enhanced sewage denitrification equipment, characterized by: The invention comprises a biological filter (1) and a secondary sedimentation tank (2), wherein a coagulation tank (501) and a flocculation tank (502) are arranged inside the secondary sedimentation tank (2), a speed reduction mechanism (6) is arranged on the inner side of the coagulation tank (501), the speed reduction mechanism (6) comprises a plurality of blocks (601), a slot (602) is formed between adjacent blocks (601), a first baffle (603), a second baffle (604) and a third baffle (605) are arranged in sequence inside the plurality of slots (602), a plurality of first through holes (606) are provided on the surface of the first baffle (603), a plurality of second through holes (607) are provided on the surface of the second baffle (604), and a plurality of third through holes (608) are provided on the surface of the third baffle (605).

2. The endogenous denitrification enhanced sewage denitrification equipment according to claim 1, characterized in that: The aperture sizes of the first through hole (606), the second through hole (607) and the third through hole (608) gradually decrease.

3. The endogenous denitrification enhanced sewage denitrification equipment according to claim 1, characterized in that: The first through holes (606), the second through holes (607) and the third through holes (608) are all arranged in an equidistant rectangular array.

4. The endogenous denitrification enhanced sewage denitrification equipment according to claim 1, characterized in that: Limiting blocks (609) are provided on both sides of the top of the first baffle (603), the second baffle (604) and the third baffle (605).

5. The endogenous denitrification enhanced sewage denitrification equipment according to claim 1, characterized in that: The coagulation tank (501) is provided with a stirring blade (504) inside, and the flocculation tank (502) is provided with a guide tube (503) inside. The guide tube (503) is similar to a gentle rapid flow, providing a stable environment for the flocculation process.

6. The endogenous denitrification enhanced sewage denitrification equipment according to claim 1, characterized in that: A water inlet pipe (301) and a backwash outlet pipe (306) are provided on one side of the biofilter (1), and a drainage pipe (302) is provided on the other side of the biofilter (1).

7. The endogenous denitrification enhanced sewage denitrification equipment according to claim 1, characterized in that: A connecting pipe (304) is provided between the biological filter (1) and the secondary sedimentation tank (2), and a back-suction pump (303) and a backwash water inlet valve (305) are provided on the connecting pipe (304).

8. The endogenous denitrification enhanced sewage denitrification equipment according to claim 1, characterized in that: A backwash fan (4) is arranged on the front side of the biological filter (1), and the output end of the backwash fan (4) is connected to the biological filter (1) through a pipeline.

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