Nitrogen and phosphorus removal structure for urban sewage treatment

Abstract

The invention provides an urban sewage treatment nitrogen and phosphorus removal structure which comprises a treatment box, a water inlet is formed in the upper portion of the treatment box, a water outlet is formed in the bottom of the treatment box, a moving mechanism is arranged in the treatment box, the moving mechanism comprises two guide mechanisms symmetrically arranged in the treatment box, and a driving mechanism is arranged on one guide mechanism. And a reaction mechanism is arranged at the output end of the driving mechanism. The reaction mechanism is driven by the moving mechanism to horizontally move in the treatment box, and meanwhile, the reaction mechanism can rotate and stir, so that a nitrogen and phosphorus removal agent and sewage can be fully and uniformly mixed in a three-dimensional space, the contact opportunity of the agent and pollutants is greatly improved, full proceeding of a nitrogen and phosphorus removal chemical reaction is ensured, and the nitrogen and phosphorus removal efficiency is improved. Therefore, pollutants such as nitrogen, phosphorus and the like in the sewage are efficiently removed, the treated sewage can meet corresponding discharge standards, and the pollution pressure on the environment of a receiving water body is effectively relieved.

Description

Technical Field

[0001] The invention mainly relates to the technical field of sewage treatment, and in particular to a denitrification and phosphorus removal structure for urban sewage treatment. Background Art

[0002] With the continuous acceleration of urbanization and the increasing density of urban population, the discharge of urban sewage is also increasing sharply. Urban sewage usually contains a large amount of organic matter, nitrogen, phosphorus and other pollutants. If it is discharged directly without effective treatment, it will cause serious pollution to the receiving water bodies (such as rivers, lakes, oceans, etc.), causing a series of environmental problems such as eutrophication of water bodies, deterioration of water quality, and destruction of aquatic ecosystems, which in turn affects the living water safety of surrounding residents and the ecological environment quality of the entire city. Therefore, efficient and comprehensive treatment of urban sewage, especially denitrification and phosphorus removal, has become an important task in the current field of environmental protection.

[0003] Traditional biological denitrification and phosphorus removal processes, such as the A² / O (anaerobic-anoxic-aerobic) process and its derivative processes, can theoretically achieve the removal of nitrogen and phosphorus. However, in actual operation, due to factors such as uneven distribution of carbon sources in sewage and difficulty in accurately controlling the microbial growth environment, the denitrification and phosphorus removal effects often cannot reach the optimal state at the same time. A certain amount of nitrogen and phosphorus pollutants will still remain in the treated sewage, making it difficult to meet increasingly stringent emission standards. For example, in the anaerobic stage, there is a competitive relationship between the release of phosphorus by polyphosphate bacteria and the demand for carbon sources for denitrification by denitrifying bacteria. If the carbon source distribution is unreasonable, it will affect the efficiency of these two processes, and thus affect the overall denitrification and phosphorus removal effect.

[0004] Some methods of denitrification and phosphorus removal using physical and chemical agents (such as polyaluminium chloride, polyacrylamide, etc. for phosphorus removal, and some redox agents for denitrification) usually adopt a fixed-position single-point or multi-point addition method when adding agents. This method easily causes uneven dispersion of agents in sewage, resulting in excessive concentration of local agents, which not only wastes agent resources, but may also cause secondary pollution due to excessive agents; and insufficient concentration of agents in some areas cannot fully react with pollutants, affecting the denitrification and phosphorus removal effects, resulting in low overall treatment efficiency.

[0005] In terms of mixing chemicals and sewage, most existing structures simply rely on the flow of sewage itself or conventional static mixing equipment (such as stirring with a stirring paddle at a fixed position) for mixing. It is difficult to achieve sufficient and dynamic mixing of chemicals and sewage in the entire treatment space. It cannot guarantee that every piece of sewage can fully contact and react with the chemicals. There are many mixing "dead corners", which is not conducive to the efficient removal of nitrogen and phosphorus pollutants. Summary of the invention

[0006] 1. Technical problems to be solved by the invention: The present invention provides a denitrification and dephosphorization structure for urban sewage treatment, which is used to solve the technical problems existing in the above-mentioned background technology.

[0007] 2. Technical solution: To achieve the above-mentioned purpose, the technical solution provided by the present invention is: a denitrification and phosphorus removal structure for urban sewage treatment, comprising a treatment box, a water inlet is arranged on the top of the treatment box, a water outlet is arranged on the bottom of the treatment box, a moving mechanism is arranged in the treatment box, the moving mechanism comprises two guide mechanisms symmetrically arranged in the treatment box, a driving mechanism is arranged on one of the guide mechanisms, a reaction mechanism is arranged on the output end of the driving mechanism, the driving mechanism is used to drive the reaction mechanism to move in the treatment box, and a denitrification and phosphorus removal agent is arranged in the reaction mechanism.

[0008] Preferably, the reaction mechanism includes a mounting frame and a mounting rack, both ends of the mounting rack are rotated in the mounting frame through a rotating shaft, the other end of the rotating shaft is connected to the first motor, the first motor is fixed on the mounting frame, and a reagent storage cabin is installed on the mounting rack, and the reagent storage cabin is used to store denitrification and dephosphorization agents.

[0009] Preferably, the medicine storage compartment is cross-shaped, a cover plate is detachably mounted on one end of the medicine storage compartment, and a plurality of delivery holes are provided on the medicine storage compartment and the cover plate.

[0010] Preferably, a fixing groove is provided on the side wall of the medicine storage compartment, and a fixing block matching with the fixing groove is provided on the mounting frame.

[0011] Preferably, the guiding mechanism comprises a connecting frame connected to the processing box, a guide rod is provided on the other end of the connecting frame, a guide groove is provided on the guide rod, a first connecting block is provided on the guide rod, a guide wheel is rotatably mounted on the first connecting block, the guide wheel is arranged in the guide groove, and the first connecting block is fixedly connected to the reaction mechanism.

[0012] Preferably, the driving mechanism includes an active synchronous pulley and a driven synchronous pulley rotatably mounted at both ends of the guide rod, the active synchronous pulley and the driven synchronous pulley are connected by a synchronous belt, the active synchronous pulley is fixed on the motor shaft of the second motor, a second connecting block is fixedly provided on the synchronous belt, and the second connecting block is fixedly connected to the reaction mechanism.

[0013] 3. Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention drives the reaction mechanism to move horizontally in the treatment box through the moving mechanism, and the reaction mechanism itself can rotate and stir, so that the denitrification and dephosphorization agent and the sewage can be fully and evenly mixed in three-dimensional space, which greatly improves the contact opportunity between the agent and the pollutants, ensures the full progress of the denitrification and dephosphorization chemical reaction, and thus efficiently removes pollutants such as nitrogen and phosphorus in the sewage, ensures that the treated sewage can meet the corresponding emission standards, and effectively reduces the pollution pressure on the receiving water environment.

[0014] The cross-shaped structure of the reagent storage cabin of the present invention and the characteristics of being able to load multiple reagents enable it to flexibly adjust the type and proportion of the denitrification and dephosphorization reagents loaded according to the water quality of different sewage (such as the difference in nitrogen and phosphorus content, the pH value of sewage, etc.), treat the sewage in a targeted manner, adapt to various complex and changeable urban sewage water quality conditions, and improve the applicability of the entire treatment structure to different sewage sources. Since the reagent can be evenly and fully mixed with the sewage, the waste of the reagent is avoided, so that each portion of the reagent can maximize its denitrification and dephosphorization effect, improve the utilization rate of the reagent, reduce the cost of the reagent, and also reduce the risk of secondary pollution caused by excessive addition of the reagent, achieving the dual benefits of economy and environmental protection.

[0015] The coordinated operation of the mobile mechanism and the reaction mechanism of the present invention allows the agent to be evenly dispersed in the sewage in the entire treatment box, avoiding the problem of excessive or insufficient local agents that may occur in the traditional fixed dosing method, so that the sewage in each area of ​​the treatment box can be treated evenly, ensuring the stability of the water quality of the treated effluent, which is conducive to the subsequent reuse of water resources or maintaining ecological balance after being discharged into the receiving water body. During the rotation and stirring process, the reaction mechanism can effectively break the possible flow dead corners of the sewage, ensure that the sewage is in a good flow and mixing state in the treatment box, and prevent the situation that the agent cannot reach and the pollutants cannot fully react due to the local poor water flow, further improving the uniformity and effectiveness of the entire sewage treatment process. The unique movement mode of the reaction mechanism integrates horizontal movement and self-rotation stirring, greatly increasing the mixing degree and reaction contact frequency of the agent and sewage, and significantly shortening the treatment time compared to the traditional static dosing or simple stirring sewage treatment method, and can treat more sewage in a unit time, improving the working efficiency of the entire sewage treatment system, and meeting the needs of rapid treatment of large amounts of urban sewage.

[0016] The cooperation of the guide mechanism and the driving mechanism of the mobile mechanism of the present invention ensures the accuracy and stability of the movement of the reaction mechanism, so that it can flexibly move in the treatment box according to the preset trajectory and speed, and the start, stop and running speed of the entire equipment can be flexibly adjusted according to the actual sewage flow, water quality, etc., and can quickly adapt to the sewage treatment needs under different working conditions, ensuring that the sewage treatment work is carried out continuously and efficiently. The cooperation of the guide wheel and the guide groove in the guide mechanism and the synchronous belt transmission design make the reaction mechanism smooth and stable during the movement process, and it is not easy to have abnormal situations such as jamming and deviation, which ensures the reliability of the entire sewage treatment structure during long-term operation, ensures that the sewage treatment work is carried out uninterruptedly, and reduces the risk of substandard sewage discharge due to equipment failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the external structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of the present invention; Figure 4 It is a schematic diagram of the internal structure of the present invention from another angle; Figure 5 It is a schematic diagram of the reaction mechanism structure of the present invention; Figure 6 It is a schematic diagram of the structure of the mounting frame of the present invention; Figure 7 It is a schematic diagram of the structure of the guide mechanism of the present invention; Figure 8 It is a schematic diagram of the driving mechanism structure of the present invention; Fig. 9 It is a schematic diagram of the structure of the medicine storage cabin of the present invention.

[0018] Reference numerals: 1. Processing box; 2. Water inlet; 3. Water outlet; 4. Moving mechanism; 5. Reaction mechanism; 51. Mounting frame; 52. First motor; 53. Mounting frame; 54. Drug storage compartment; 541. Cover plate; 542. Release hole; 543. Fixing groove; 55. Rotating shaft; 56. Fixing block; 6. Guide mechanism; 61. Connecting frame; 62. Guide rod; 63. Guide groove; 64. First connecting block; 65. Guide wheel; 7. Driving mechanism; 71. Active synchronous pulley; 72. Driven synchronous pulley; 73. Synchronous belt; 74. Second motor; 75. Second connecting block. DETAILED DESCRIPTION

[0019] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", etc. 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] It should be noted that the structures not introduced in the present invention are the same as the prior art or can be implemented by using the prior art, and are not described in detail here because they do not involve the design points and improvement directions of the present invention. Example

[0024] Refer to the attached Figures 1 to 9A denitrification and dephosphorization structure for urban sewage treatment includes a treatment box 1, a water inlet 2 is arranged on the top of the treatment box 1, a water outlet 3 is arranged at the bottom of the treatment box 1, a moving mechanism 4 is arranged in the treatment box 1, and the moving mechanism 4 includes two guide mechanisms 6 symmetrically arranged in the treatment box 1, a driving mechanism 7 is arranged on one of the guide mechanisms 6, and a reaction mechanism 5 is arranged on the output end of the driving mechanism 7, and the driving mechanism 7 is used to drive the reaction mechanism 5 to move in the treatment box 1, and a denitrification and dephosphorization agent is arranged in the reaction mechanism 5.

[0025] The reaction mechanism 5 includes a mounting frame 51 and a mounting rack 53. Both ends of the mounting rack 53 rotate in the mounting frame 51 through a rotating shaft 55. The other end of a rotating shaft 55 is connected to a first motor 52. The first motor 52 is fixed on the mounting frame 51. A reagent storage cabin 54 is installed on the mounting rack 53. The reagent storage cabin 54 is used to store denitrification and dephosphorization agents.

[0026] The medicine storage compartment 54 is cross-shaped, and a cover plate 541 is detachably mounted on one end of the medicine storage compartment 54 . A plurality of injection holes 542 are provided on the medicine storage compartment 54 and the cover plate 541 .

[0027] A fixing groove 543 is provided on the side wall of the medicine storage compartment 54 , and a fixing block 56 matching with the fixing groove 543 is provided on the mounting frame 53 .

[0028] The guiding mechanism 6 includes a connecting frame 61 connected to the processing box 1, a guiding rod 62 is arranged on the other end of the connecting frame 61, a guiding groove 63 is opened on the guiding rod 62, a first connecting block 64 is arranged on the guiding rod 62, a guide wheel 65 is rotatably mounted on the first connecting block 64, the guide wheel 65 is arranged in the guiding groove 63, and the first connecting block 64 is fixedly connected to the reaction mechanism 5.

[0029] The driving mechanism 7 includes a driving synchronous pulley 71 and a driven synchronous pulley 72 rotatably mounted at both ends of the guide rod 62. The driving synchronous pulley 71 and the driven synchronous pulley 72 are connected by a synchronous belt 73. The driving synchronous pulley 71 is fixed on the motor shaft of the second motor 74. A second connecting block 75 is fixedly provided on the synchronous belt 73. The second connecting block 75 is fixedly connected to the reaction mechanism 5.

[0030] Working principle: The sewage enters the treatment box 1 through the water inlet 2 above the treatment box 1. At this time, the moving mechanism 4, reaction mechanism 5 and other related components in the treatment box 1 are in an initial preparation state, waiting for the denitrification and dephosphorization operation on the incoming sewage.

[0031] In the initial stage, the staff can load the denitrification and dephosphorization agents into the agent storage cabin 54 after opening the detachable cover 541 at one end of the agent storage cabin 54. The detachable design of the cover 541 of the agent storage cabin 54 facilitates the loading of the agent and the inspection and cleaning of the interior of the equipment. The agent storage cabin 54 is a cross-shaped structure with a large storage space and a reasonable internal division, which is convenient for the classified storage of denitrification and dephosphorization agents of different types or different proportions to meet the diverse needs of sewage treatment. After loading, the cover 541 is installed so that it is sealed with the agent storage cabin 54 to prevent leakage of the agent and sewage backflow from affecting the performance of the agent during subsequent treatment. The several delivery holes 542 opened on the agent storage cabin 54 and the cover 541 are used to accurately deliver the agent into the sewage during the treatment process to achieve contact and mixing of the agent and the sewage. At the same time, the medicine storage compartment 54 cooperates with the fixing block 56 on the mounting frame 53 through the fixing groove 543 on the side wall to ensure that the medicine storage compartment 54 is firmly installed on the mounting frame 53 to avoid shaking, displacement, etc. during operation.

[0032] The driving mechanism 7 in the moving mechanism 4 is started, and the second motor 74 of the driving mechanism 7 starts to run, driving the active synchronous pulley 71 fixed on the motor shaft to rotate. Since the active synchronous pulley 71 and the driven synchronous pulley 72 are connected by the synchronous belt 73, the rotation of the active synchronous pulley 71 will cause the synchronous belt 73 to run. The second connecting block 75 fixedly arranged on the synchronous belt 73 is fixedly connected to the reaction mechanism 5, so when the synchronous belt 73 moves, the reaction mechanism 5 will move horizontally along the direction defined by the guide mechanism 6.

[0033] In the guide mechanism 6, one end of the connecting frame 61 is firmly connected to the treatment box 1, and the guide rod 62 at the other end provides a guiding support for the movement of the reaction mechanism 5. A guide wheel 65 is arranged in the guide groove 63 provided on the guide rod 62. The guide wheel 65 is fixedly connected to the reaction mechanism 5 through the first connecting block 64 and can rotate in the guide groove 63. In this way, when the reaction mechanism 5 moves with the synchronous belt 73, the guide wheel 65 rolls along the guide groove 63, which can not only ensure the stability of the movement of the reaction mechanism 5, but also accurately limit its moving direction, so that it can stably move in the treatment box 1 according to the preset horizontal trajectory, ensuring that the reaction mechanism 5 can fully contact with the sewage at different positions in the treatment box 1, so that the denitrification and dephosphorization agent added later can be evenly dispersed in the sewage.

[0034] During the horizontal movement of the reaction mechanism 5 along the treatment box 1, the first motor 52 on the reaction mechanism 5 is started, and the first motor 52 drives the rotating shaft 55 connected thereto to rotate, thereby causing the mounting frame 53 to rotate around the rotating shaft 55 in the mounting frame 51. The reagent storage cabin 54 installed on the mounting frame 53 also rotates accordingly. During the rotation process, the denitrification and dephosphorization agent in the reagent storage cabin 54 is gradually released into the sewage in the treatment box 1 through the release hole 542. At the same time, the rotation of the mounting frame 53 will produce a stirring effect on the surrounding sewage, so that the agent and sewage can be mixed more fully, accelerate the chemical reaction rate of denitrification and dephosphorization, and improve the treatment efficiency. Moreover, this rotation and stirring method can make the sewage form water flows in different directions in the treatment box 1, avoid the situation where the local concentration of the agent is too high or the mixing is uneven, and ensure that the sewage in the entire treatment box 1 can be treated evenly and effectively.

[0035] As the reaction mechanism 5 continuously moves horizontally in the treatment box 1 and rotates itself to add and stir the reagents, the nitrogen, phosphorus and other pollutants in the sewage fully react with the denitrification and dephosphorization reagents and are gradually removed and transformed. After a certain period of treatment, the treated sewage gathers to the bottom of the treatment box 1 by gravity, and finally flows out through the water outlet 3 at the bottom of the treatment box 1, achieving standard discharge or entering the subsequent deep treatment link, completing the denitrification and dephosphorization treatment process of the entire urban sewage.

[0036] The above-described embodiments only express a certain implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A structure for denitrification and phosphorus removal for urban sewage treatment, characterized in that: The invention comprises a treatment box (1), wherein a water inlet (2) is arranged on the top of the treatment box (1), a water outlet (3) is arranged on the bottom of the treatment box (1), a moving mechanism (4) is arranged in the treatment box (1), and the moving mechanism (4) comprises two guide mechanisms (6) symmetrically arranged in the treatment box (1), a driving mechanism (7) is arranged on one of the guide mechanisms (6), a reaction mechanism (5) is arranged on the output end of the driving mechanism (7), and the driving mechanism (7) is used to drive the reaction mechanism (5) to move in the treatment box (1), and a denitrification and dephosphorization agent is arranged in the reaction mechanism (5).

2. A denitrification and phosphorus removal structure for urban sewage treatment according to claim 1, characterized in that: The reaction mechanism (5) comprises a mounting frame (51) and a mounting rack (53), wherein two ends of the mounting rack (53) are rotated in the mounting frame (51) via a rotating shaft (55), and the other end of the rotating shaft (55) is connected to a first motor (52), and the first motor (52) is fixed on the mounting frame (51). A reagent storage cabin (54) is installed on the mounting rack (53), and the reagent storage cabin (54) is used to store denitrification and dephosphorization reagents.

3. A denitrification and phosphorus removal structure for urban sewage treatment according to claim 2, characterized in that: The medicine storage chamber (54) is cross-shaped, and a cover plate (541) is detachably mounted on one end of the medicine storage chamber (54). A plurality of delivery holes (542) are provided on the medicine storage chamber (54) and the cover plate (541).

4. A denitrification and phosphorus removal structure for urban sewage treatment according to claim 3, characterized in that: A fixing groove (543) is provided on the side wall of the medicine storage compartment (54), and a fixing block (56) matching the fixing groove (543) is provided on the mounting frame (53).

5. A denitrification and phosphorus removal structure for urban sewage treatment according to claim 1, characterized in that: The guide mechanism (6) comprises a connecting frame (61) connected to the processing box (1); a guide rod (62) is arranged on the other end of the connecting frame (61); a guide groove (63) is formed on the guide rod (62); a first connecting block (64) is arranged on the guide rod (62); a guide wheel (65) is rotatably mounted on the first connecting block (64); the guide wheel (65) is arranged in the guide groove (63); and the first connecting block (64) is fixedly connected to the reaction mechanism (5).

6. A denitrification and phosphorus removal structure for urban sewage treatment according to claim 5, characterized in that: The driving mechanism (7) comprises a driving synchronous pulley (71) and a driven synchronous pulley (72) rotatably mounted on both ends of the guide rod (62); the driving synchronous pulley (71) and the driven synchronous pulley (72) are connected via a synchronous belt (73); the driving synchronous pulley (71) is fixed on a motor shaft of a second motor (74); a second connecting block (75) is fixedly provided on the synchronous belt (73); and the second connecting block (75) is fixedly connected to the reaction mechanism (5).

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