A device for removing nitrogen and phosphorus in industrial wastewater treatment
The combination of a ball screw-driven movable arm and planetary gear mixing system solves the problems of insufficient dissolution and uneven distribution of reagents, achieving efficient wastewater treatment, especially nitrogen and phosphorus removal from high-concentration industrial wastewater, while reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGYING BOWEN ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-05
AI Technical Summary
Traditional wastewater treatment methods often result in insufficient dissolution and uneven distribution of chemicals, leading to low pollutant removal efficiency, chemical waste, and high operating costs.
The mixing system employs a combination of a screw-driven movable arm and planetary gears. The screw drives the movable arm to move laterally, while the planetary gears enable the mixing rod to rotate and revolve, forming a spiral propulsion flow pattern to ensure thorough mixing of the reagents and wastewater.
It significantly improves the denitrification and phosphorus removal reaction rate, is suitable for treating high-concentration industrial wastewater, reduces unit water treatment energy consumption, and improves mixing uniformity.
Smart Images
Figure CN224325175U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a denitrification and phosphorus removal device for industrial wastewater treatment. Background Technology
[0002] In the biological treatment of wastewater, nitrogen and phosphorus removal are complex processes achieved through multi-stage biochemical reactions. In the nitrogen removal stage, ammonia nitrogen is first converted into nitrate through nitrification in an aerobic environment. Then, under anoxic conditions, nitrate is reduced to nitrogen gas through denitrification. The phosphorus removal process relies on polyphosphate-accumulating bacteria to release phosphorus in an anaerobic environment and absorb excess phosphorus in an aerobic environment. Finally, phosphorus removal is achieved through sludge discharge. Both processes require strict control of parameters such as dissolved oxygen concentration and sludge age.
[0003] To achieve efficient nitrogen and phosphorus removal, chemical agents need to be added in multiple treatment stages. When biological phosphorus removal is insufficient, coagulants such as iron or aluminum salts need to be added to form phosphate precipitates. In the denitrification stage where carbon sources are insufficient, organic carbon sources such as sodium acetate or methanol need to be added. Acid and alkali reagents need to be added to the equalization tank to maintain a suitable pH value. Some advanced treatment processes also require the addition of oxidants to decompose recalcitrant organic matter. The thorough mixing and uniform distribution of these agents are directly related to the treatment effect and operating cost.
[0004] Traditional processes use fixed stirring rods for mixing chemicals. The single rotation mode results in slow chemical dissolution, blind spots causing localized excessively high or low chemical concentrations, axial flow causing stratified distribution of chemicals within the reaction tank, and short-circuiting phenomena causing some wastewater to flow out of the treatment system without sufficient contact with chemicals. This inadequate mixing not only reduces pollutant removal efficiency but also leads to chemical waste and increased operating costs. There is an urgent need to develop new mixing technologies to optimize reaction conditions. Summary of the Invention
[0005] The purpose of this invention is to provide a nitrogen and phosphorus removal device for industrial wastewater treatment, which solves the problems of insufficient dissolution and uneven distribution of reagents in traditional reactions.
[0006] To achieve the above objectives, this utility model provides a nitrogen and phosphorus removal device for industrial wastewater treatment, comprising a base, a reaction tank fixedly mounted on the upper end of the base, lead screws rotatably mounted on the left and right sides of the reaction tank, the front and rear ends of the lead screws being connected to the reaction tank via lead screw frames, a first motor fixedly mounted on the rear end of the lead screw frame, the output shaft of the first motor being connected to the lead screw, ball nuts movably mounted on the lead screw, movable arms fixedly mounted on the upper ends of the two ball nuts, a limit end fixedly mounted on the lead screw, and a stirring assembly mounted on the lower end of the movable arms. The base bears the weight of the entire device. The load transmits vibration energy to the ground. The reaction tank provides a closed space for the mixing and reaction of wastewater and reagents and maintains the hydraulic conditions for the treatment process. The lead screw converts the rotational motion of the motor into linear driving force and controls the movement accuracy through the thread lead. The lead screw frame fixes the spatial position of the transmission shaft system and absorbs the radial runout during the operation of the lead screw. The first motor outputs controllable speed and torque as the primary power source and supports forward and reverse switching. The ball nut reduces the friction coefficient of the lead screw transmission and converts the rotational force into linear thrust. The movable arm connects the stirring system and the transmission mechanism and realizes the power transmission of lateral displacement. The limit end sets the extreme value of the mechanical movement stroke.
[0007] The stirring assembly includes a second motor. The upper end of the movable arm is fixedly equipped with the second motor, and the lower end of the second motor is fixedly equipped with a first coupling. The second motor provides independent rotational power for the stirring assembly and realizes speed regulation. The first coupling compensates for the installation deviation between the motor shaft and the gearbox and buffers the starting impact.
[0008] The lower end of the movable arm is fixedly provided with a housing, and a gear ring is fixedly provided inside the housing. The housing seals the operating space of the planetary gear set and prevents sewage from corroding the transmission components. The gear ring, as a fixed internal gear, forms the planetary transmission reference track and distributes torque.
[0009] The gear ring has a sun tooth rotating inside, and three planetary teeth rotating between the sun tooth and the gear ring. The sun tooth acts as the central drive wheel, driving the planetary gear system and determining the transmission ratio. The planetary teeth transmit combined power and increase the stirring coverage area during their rotation and revolution.
[0010] The adjacent planetary gears are connected by a planetary carrier. A second coupling is fixedly installed at the lower end of each planetary gear. The planetary carrier keeps the relative position between the planetary gears stable and distributes the load evenly. The second coupling eliminates the misalignment error of the stirring shaft system and adapts to the underwater working environment.
[0011] The lower end of the second coupling is fixedly provided with a rotating rod, and a connecting rod is fixedly provided on the outer side of the rotating rod. The rotating rod transmits the power of the gearbox vertically to the stirring zone and bears the fluid resistance torque, while the connecting rod enhances the rigid connection of the stirring mechanism.
[0012] The connecting rod has a main rod fixedly installed at its lower end, and several stirring rods are fixedly installed on the outer ring of the main rod. The main rod serves as the core support shaft for the stirring blades and forms the swirling center line. The stirring rods directly shear the fluid medium and generate turbulence to promote the mixing reaction.
[0013] The motor-driven lead screw propels the movable arm laterally, while the planetary gear system drives the stirring rod to rotate and revolve. This creates a spiral-propelled flow pattern within the reaction tank. The horizontal displacement of the movable arm ensures the stirring area covers the entire tank. The linkage structure between the sun gear and planetary gears achieves efficient power distribution. The combined motion of multiple stirring rods generates strong hydraulic shear, effectively breaking down wastewater stratification and promoting full contact between treatment agents and pollutants. Compared to traditional single-rotation stirring, this design significantly improves the denitrification and phosphorus removal reaction rate, making it particularly suitable for high-concentration industrial wastewater treatment. The precise fit between the lead screw and ball nut ensures smooth, unobstructed movement of the movable arm, and the limit end design prevents mechanical overshoot damage. The planetary gears... The unit adopts a closed shell to protect key components from sewage corrosion. The coupling connection eliminates installation misalignment between the motor and the drive shaft. The rigidly connected main rod and stirring rod maintain dynamic balance during high-speed rotation. The entire power system uses two-stage motors to control the lateral movement and rotation speed separately, and can flexibly adjust the stirring intensity according to changes in water quality. The first and second motors adopt an independent drive mode to achieve precise coordination of displacement and speed. When the moving arm reciprocates, the stirring rod automatically switches the rotation direction to form a counter-current. The torque distribution characteristics of the planetary gear set ensure that the load of the three stirring units is balanced. The equipment can still maintain an effective stirring effect at low speeds. Through dynamic matching of motor power and sewage treatment capacity, the energy consumption per unit of water treatment is significantly reduced. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0015] Figure 1 This is a schematic diagram of the overall structure of the nitrogen and phosphorus removal device for industrial wastewater treatment according to an embodiment of this utility model.
[0016] Figure 2 This is a schematic diagram of the structure of the movable arm drive assembly according to an embodiment of the present invention.
[0017] Figure 3 This is a schematic diagram of the stirring assembly structure according to an embodiment of the present invention.
[0018] Figure 4 This is a schematic diagram of the stirring rod structure according to an embodiment of the present invention.
[0019] Figure 5This is a cross-sectional structural diagram of the planetary gear set according to an embodiment of the present invention.
[0020] 1. Base, 2. Reaction tank, 3. Lead screw, 4. Lead screw holder, 5. First motor, 6. Ball nut, 7. Movable arm, 8. Limiting end, 9. Second motor, 10. First coupling, 11. Housing, 12. Sun gear, 13. Gear ring, 14. Planetary gear, 15. Planetary carrier, 16. Second coupling, 17. Rotating rod, 18. Connecting rod, 19. Main rod, 20. Stirring rod. Detailed Implementation
[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0022] Please see Figures 1-5 A nitrogen and phosphorus removal device for industrial wastewater treatment includes a base 1, a reaction tank 2 fixedly mounted on the upper end of the base 1, lead screws 3 rotatably mounted on the left and right sides of the reaction tank 2, the front and rear ends of the lead screws 3 connected to the reaction tank 2 via lead screw frames 4, a first motor 5 fixedly mounted on the rear end of the lead screw frame 4, the output shaft of the first motor 5 connected to the lead screw 3, ball nuts 6 movably mounted on the lead screw 3, movable arms 7 fixedly mounted on the upper ends of the two ball nuts 6, limit ends 8 fixedly mounted on the lead screw 3, and a stirring assembly mounted on the lower end of the movable arms 7. The base 1 bears the overall weight of the device and... Dispersing vibration energy to the foundation, reaction tank 2 constructs a closed space for sewage treatment and maintains the fluid environment required for the reaction. Lead screw 3 converts rotational motion into linear displacement and controls movement accuracy through thread lead. Lead screw frame 4 constrains the radial degree of freedom of the lead screw and ensures transmission stability. First motor 5 outputs adjustable speed and torque to drive the lead screw to rotate. Ball nut 6 reduces the frictional resistance of the lead screw transmission and converts rotational force into linear thrust. Movable arm 7 connects the transmission mechanism and the stirring assembly and realizes lateral power transmission. Limit end 8 sets the travel limit of mechanical movement and triggers the protection mechanism.
[0023] Please see Figures 1-5The mixing assembly includes a second motor 9. The upper end of the movable arm 7 is fixedly equipped with the second motor 9, and the lower end of the second motor 9 is fixedly equipped with a first coupling 10. The lower end of the movable arm 7 is fixedly equipped with a housing 11. A gear ring 13 is fixedly equipped inside the housing 11. A sun gear 12 is rotatably arranged inside the gear ring 13. Three planetary gears 14 are rotatably arranged between the sun gear 12 and the gear ring 13. The second motor 9 independently drives the mixing system to rotate and supports speed control. The first coupling 10 compensates for the installation error between the motor shaft and the gearbox and absorbs the starting impact. The housing 11 encapsulates the planetary gear set and prevents sewage from corroding the transmission components. The gear ring 13, as a fixed inner gear ring, provides the reference track for the movement of the planetary gears. The sun gear 12, as the central drive wheel, transmits power and determines the transmission ratio. The planetary gears 14 distribute torque in rotation and revolution and expand the mixing range.
[0024] Please see Figures 4-5 Adjacent planetary gears 14 are connected by a planetary carrier 15. A second coupling 16 is fixedly installed at the lower end of the planetary gears 14. A rotating rod 17 is fixedly installed at the lower end of the second coupling 16. A connecting rod 18 is fixedly installed on the outer side of the rotating rod 17. A main rod 19 is fixedly installed at the lower end of the connecting rod 18. Several stirring rods 20 are fixedly installed on the outer ring of the main rod 19. The planetary carrier 15 maintains the relative position between the planetary gears and balances the load. The second coupling 16 eliminates the coaxiality deviation of the stirring shaft system and adapts to underwater working conditions. The rotating rod 17 vertically transmits the power of the gearbox to the stirring area and bears the fluid resistance. The connecting rod 18 strengthens the rigid connection of the stirring mechanism and adjusts the blade angle. The main rod 19 serves as the core support shaft of the stirring blades and forms the vortex center. The stirring rods 20 directly shear the fluid medium and generate turbulence to promote the mixing reaction.
[0025] Working Principle: When this device is in operation, the base 1 first supports the reaction tank 2 to achieve overall structural stability. When the first motor 5 starts, it drives the lead screw 3 to rotate under the limit of the lead screw frame 4, which in turn drives the ball nut 6 to convert the rotational motion into linear motion, pushing the movable arm 7 to move laterally along the reaction tank 2. The limiting end 8 constrains the stroke of the movable arm 7 to prevent the stirring rod 20 from colliding with the inner wall of the reaction tank 2. During the movement of the movable arm 7, the second motor 9 drives the sun gear 12 to rotate through the first coupling 10. The sun gear 12 meshes with the fixed gear ring 13, driving three planetary gears 14 to revolve around the sun gear 12. The planetary carrier 15 maintains the relative position stability of the planetary gears 14. Each planetary gear 14 transmits power to the rotating rod 17 through the second coupling 16. The moving rod 17 drives the main rod 19 to rotate axially via the connecting rod 18, which in turn drives the circumferentially distributed stirring rods 20 to form a three-dimensional stirring. The planetary gear transmission system enables the three stirring rods 20 to rotate on their own axis while revolving around the center. When the moving arm 7 moves laterally, the composite motion trajectory of the stirring rods 20 covers the entire area of the reaction tank 2. The mechanical motion enhances the mixing and contact between the wastewater and the treatment agent. The precise fit between the lead screw 3 and the ball nut 6 ensures that the moving arm 7 moves smoothly. The meshing transmission between the gear ring 13 and the planetary gears 14 achieves efficient power distribution. The second coupling 16 eliminates different axiality errors to ensure the torque transmission efficiency of the rotating rod 17. The rigid connection between the connecting rod 18 and the main rod 19 causes the stirring rods 20 to generate a strong vortex.
[0026] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.
Claims
1. A nitrogen and phosphorus removal device for industrial wastewater treatment, comprising a base (1), characterized in that, A reaction tank (2) is fixedly installed on the upper end of the base (1). A lead screw (3) is rotatably installed on the left and right sides of the reaction tank (2). The front and rear ends of the lead screw (3) are connected to the reaction tank (2) through a lead screw frame (4). A first motor (5) is fixedly installed at the rear end of the lead screw frame (4). The output shaft of the first motor (5) is connected to the lead screw (3). A ball nut (6) is movably installed on the lead screw (3). A movable arm (7) is fixedly installed on the upper end of the two ball nuts (6). A limit end (8) is fixedly installed on the lead screw (3). A stirring assembly is installed at the lower end of the movable arm (7).
2. The nitrogen and phosphorus removal device for industrial wastewater treatment as described in claim 1, characterized in that, The stirring assembly includes a second motor (9), the upper end of the movable arm (7) is fixedly provided with the second motor (9), and the lower end of the second motor (9) is fixedly provided with a first coupling (10).
3. The nitrogen and phosphorus removal device for industrial wastewater treatment as described in claim 1, characterized in that, The lower end of the movable arm (7) is fixedly provided with a housing (11), and a toothed ring (13) is fixedly provided inside the housing (11).
4. The nitrogen and phosphorus removal device for industrial wastewater treatment as described in claim 3, characterized in that, The gear ring (13) is provided with a sun tooth (12) inside, and three planetary teeth (14) are provided between the sun tooth (12) and the gear ring (13).
5. The nitrogen and phosphorus removal device for industrial wastewater treatment as described in claim 4, characterized in that, The adjacent planetary teeth (14) are connected by a planet carrier (15), and a second coupling (16) is fixedly provided at the lower end of the planetary teeth (14).
6. The nitrogen and phosphorus removal device for industrial wastewater treatment as described in claim 5, characterized in that, A rotating rod (17) is fixedly provided at the lower end of the second coupling (16), and a connecting rod (18) is fixedly provided on the outer side of the rotating rod (17).
7. The nitrogen and phosphorus removal device for industrial wastewater treatment as described in claim 6, characterized in that, The lower end of the connecting rod (18) is fixedly provided with a main rod (19), and several stirring rods (20) are fixedly provided on the outer ring of the main rod (19).