Phosphorus removal dosing device for sewage treatment

Abstract

The application discloses a phosphorus removal dosing device for sewage treatment and belongs to the technical field of sewage treatment, which comprises a kettle body and a kettle cover, the kettle cover is installed on the top of the kettle body, a water inlet pipe is installed on the kettle cover, a stirring mechanism for mixing solid phosphorus removal agent and water is arranged on the kettle cover, a crushing mechanism for crushing the solid phosphorus removal agent is further arranged on the kettle cover, the crushing mechanism is located on one side of the stirring mechanism, and a liquid outlet pipe is installed below the inside of the kettle body. The blocky solid phosphorus removal agent is crushed by the crushing mechanism, so that the blocky agent is changed into the solid phosphorus removal agent with relatively uniform particle size. After the crushed agent enters the kettle body, the agent can be quickly and uniformly mixed with water under the action of the stirring mechanism, the problems of direct sinking of the caked agent, insufficient dissolution and uneven distribution of effective components are avoided, and the phosphorus removal effect of the subsequent overall sewage treatment is stable and reliable.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and specifically relates to a phosphorus removal dosing device for wastewater treatment. Background Technology

[0002] Wastewater treatment is a core environmental protection technology that uses specialized purification processes to ensure that wastewater quality meets designated water body discharge standards or recycling requirements. Currently, wastewater treatment technology has been widely applied in many industries such as construction engineering, modern agriculture, transportation, energy production, petrochemicals, ecological environmental protection, urban landscape, medical and health care, and catering services. With the continuous improvement of urban and rural water environment governance systems, wastewater treatment has been deeply integrated into residents' daily lives and has become a key link in water environment ecological protection and water resource recycling.

[0003] Based on the source of wastewater, wastewater treatment is mainly divided into two types: industrial wastewater treatment and domestic wastewater treatment. Industrial wastewater includes industrial production wastewater, agricultural breeding and planting wastewater, medical treatment wastewater and other specific polluted water bodies. Domestic wastewater is mixed wastewater generated by residents' daily living and work. Its water quality composition is complex and it is a composite wastewater system containing a variety of inorganic impurities and organic pollutants.

[0004] In wastewater treatment processes, chemical phosphorus removal is the mainstream key technology for controlling the total phosphorus content in water bodies and solving the problem of eutrophication. The core principle of this process is to add a special phosphorus removal agent to the wastewater to be treated in a quantitative manner. The active components of the agent react specifically with phosphorus pollutants such as phosphates and organic phosphorus in the wastewater to generate stable solid precipitates that are insoluble in water. Combined with physical separation processes such as flocculation, sedimentation, and filtration, the solid precipitates are completely separated from the wastewater system, thereby efficiently removing phosphorus from the wastewater and ensuring that the effluent quality meets the standards.

[0005] Existing phosphorus removal agents can be divided into two main categories based on their physical form: liquid phosphorus removal agents and solid phosphorus removal agents. Liquid phosphorus removal agents are pre-mixed homogeneous solutions that can be directly and quantitatively added to wastewater treatment equipment and water bodies. They are easy to operate, have high dosing efficiency, and are suitable for continuous wastewater treatment scenarios. Solid phosphorus removal agents are mainly in powder or granular form. Compared with liquid agents, they have the advantages of small volume, convenient storage and transportation, small storage space, and suitability for large-scale centralized procurement and long-term storage. They are widely used in large and medium-sized wastewater treatment plants and have lower overall storage and transportation costs.

[0006] However, in practical applications, existing solid phosphorus removal agents have significant technical defects. On the one hand, the agents are often stored in stacks, and excessive stacking height and long-term gravity compression will cause the bottom agent particles to be tightly compacted, adhered and agglomerated, thus forming hard lumps and caking. On the other hand, excessive humidity in the storage environment and excessively long storage period will cause the agents to absorb moisture, further aggravating the problems of clumping and hardening.

[0007] During the dissolution and preparation process, the clumps of solid phosphorus removal agents that have clumped together are difficult to quickly and evenly integrate with the water. They tend to settle directly to the bottom of the dissolution equipment, failing to disperse, dissolve, and activate fully. This not only significantly reduces the utilization rate of the agent but also prevents the effective components from acting evenly on the wastewater system, resulting in insufficient phosphorus removal reaction and unstable phosphorus removal efficiency. Ultimately, this greatly reduces the overall wastewater treatment effect, while also leading to agent waste and increased treatment costs, making it difficult to meet the production and application requirements of large-scale, high-precision wastewater phosphorus removal. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a phosphorus removal dosing device for wastewater treatment, so as to solve the problem that the clumped solid phosphorus removal agent in the prior art cannot be quickly and uniformly mixed with the water.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A phosphorus removal dosing device for wastewater treatment includes a vessel body and a vessel cover. The vessel cover is installed on the top of the vessel body and has an inlet pipe. Support legs are installed below the vessel body. A slag discharge pipe is installed in the middle of the bottom of the vessel body and has a slag discharge valve. The vessel cover is equipped with a stirring mechanism for mixing solid phosphorus removal agent with water and a crushing mechanism for crushing solid phosphorus removal agent. The crushing mechanism is located on one side of the stirring mechanism. A liquid outlet pipe is installed at the bottom inside the vessel body. The liquid outlet pipe includes an annular pipe and a zigzag pipe connected to the annular pipe. The end of the zigzag pipe extends through the slag discharge pipe to the outside of the vessel body. A liquid outlet valve is installed on the zigzag pipe located outside the vessel body. Multiple through holes are evenly spaced at equal angles along the circumference of the top of the annular pipe.

[0010] The stirring mechanism includes a first geared motor, a stirring shaft, and a support plate. The stirring shaft is rotatably mounted on the vessel lid, and its bottom end extends to the lower part of the vessel body. There are multiple support plates, which are evenly distributed vertically along the stirring shaft at equal intervals. Multiple first stirring blades are installed at equal angles on the circumference of the support plate. The first stirring blades are rectangular blades vertically welded to the support plate, and the length of the first stirring blades is greater than the thickness of the support plate. The first geared motor is mounted on the top of the vessel lid, and the output shaft of the first geared motor is connected to the top of the stirring shaft.

[0011] The stirring mechanism also includes annular rings and second stirring blades. There are two annular rings, which are mounted on the stirring shaft via connecting rods. The diameter of the annular rings is larger than the diameter of the support plate. One annular ring is located above the support plate at the bottom of the stirring shaft, and the other annular ring is located above the support plate at the top of the stirring shaft. There are multiple second stirring blades, which are mounted on the two annular rings at their two ends respectively. The second stirring blades are evenly distributed at equal angles along the circumference of the annular rings, and the second stirring blades are generally long and flat.

[0012] The crushing mechanism includes a crushing box, a second reduction motor, a first crushing roller, a second crushing roller, and a third crushing roller. The crushing box is installed through the vessel lid. A straight cylinder is installed at the bottom of the crushing box. The crushing box is welded together from three parts: upper, middle, and lower. The upper part of the crushing box is a truncated pyramid with a wider top and a narrower bottom. The middle part is a rectangular shell. The lower part is a truncated pyramid with a rectangular top and a circular bottom. The upper and lower ends of the upper part, the upper and lower ends of the middle part, and the upper end of the lower part of the crushing box have the same dimensions to facilitate the entry and exit of the phosphorus removal agent. The first, second, and third crushing rollers are rotatably installed above the middle part of the crushing box. The first and second crushing rollers are arranged in parallel. The third crushing roller is located below the first and second crushing rollers. Gears are installed at the ends of the first and second crushing rollers, and the two gears mesh with each other. Synchronous pulleys are installed at the ends of the second and third crushing rollers, and the two synchronous pulleys are connected by a synchronous belt. The gears, synchronous pulleys, and synchronous belt are all located outside the crushing box. The second reduction motor is installed outside the crushing box, and the output shaft of the second reduction motor is connected to one end of the third crushing roller.

[0013] Furthermore, the crushing mechanism also includes a screen and a screw conveyor. The screen is obliquely installed inside the crushing chamber, below the third crushing roller. One end of the screen is fixedly connected to the inner wall of the crushing chamber, while the other end has a gap with the inner wall. The screw conveyor is installed on the lid and located on one side of the crushing chamber. The bottom of the screw conveyor is connected to the middle of the crushing chamber through a feed pipe, and the top of the screw conveyor is connected to the upper part of the crushing chamber through a discharge pipe. Both the feed pipe and the discharge pipe are inclined, with the feed pipe higher on the left and lower on the right, and the discharge pipe lower on the left and higher on the right, to facilitate the flow of the dephosphorizing agent. A collection hood is installed at the end of the feed pipe away from the screw conveyor. The collection hood is located at the lower part of the end of the screen closest to the feed pipe and is used to collect the dephosphorizing agent rolling off the screen.

[0014] Furthermore, the first, second, and third crushing rollers have the same structure and each includes crushing teeth and crushing blocks. There are multiple crushing teeth and crushing blocks, which are evenly distributed along the circumference of the first, second, and third crushing rollers. The crushing teeth and crushing blocks on the first, second, and third crushing rollers are evenly staggered in the transverse direction. The crushing teeth and crushing blocks on the first crushing roller correspond to the crushing blocks and crushing teeth on the second crushing roller. The crushing blocks are rectangular blocks. Each crushing tooth includes a vertical rod and a boss provided on the vertical rod. The boss is a truncated pyramid that is narrow at the top and wide at the bottom. There is at least one boss.

[0015] Preferably, the gears, timing pulleys, and timing belts are provided with protective covers, which are installed on the outer wall of the crushing chamber.

[0016] Preferably, an arc-shaped tube is also installed on the lower side wall of the straight cylinder. The end of the arc-shaped tube is symmetrical to the end of the straight cylinder about the stirring axis. A sealing mechanism is also provided below the straight cylinder. The sealing mechanism includes a support plate, a turntable, a movable rod, a sealing plate, and a drive motor. The support plate is installed on the outer side wall of the vessel body. A column is installed on the top of the support plate. The drive motor is installed on one side of the column. The turntable is located on the side of the column away from the drive motor. The output shaft of the drive motor passes through the column and connects to the turntable. A pin is eccentrically installed on the side of the turntable away from the column. A movable block is provided around the pin. The movable block has a hollow elliptical structure. The pin abuts against the inside of the movable block. The movable rod is installed on the left side of the movable block and passes through the interior of the vessel body. The sealing plate is installed at the end of the movable rod located inside the vessel body. The sealing plate can abut against the lower end of the straight cylinder. The sealing plate is made of rubber.

[0017] Preferably, a support frame is provided on the upper part of the stirring shaft. The support frame is generally annular and has a groove inside. The support frame is installed on the stirring shaft by a connecting rod. The outer wall and bottom wall of the support frame are both mesh structures.

[0018] The beneficial effects of this invention are: 1) The lumpy solid phosphorus removal agent is crushed by the crushing mechanism to form solid phosphorus removal agent with relatively uniform particle size. After the crushed agent enters the reactor, it can be quickly and evenly mixed with water under the action of the stirring mechanism, avoiding problems such as the lumpy agent sinking directly to the bottom, insufficient dissolution, and uneven distribution of effective components, thereby ensuring the stable and reliable phosphorus removal effect of the subsequent overall sewage treatment.

[0019] 2) The crushing mechanism uses a first crushing roller, a second crushing roller, and a third crushing roller in combination, and achieves synchronous linkage through gears, synchronous pulleys, and synchronous belts. The first crushing roller rotates in opposite directions to the second crushing roller, and the third crushing roller rotates in the same direction as the second crushing roller. This allows for multi-stage extrusion, shearing, and crushing of lumpy dephosphorizing agents. Uncaked agents can pass through smoothly, while agglomerated agents are fully crushed, which improves crushing efficiency and reduces the risk of blockage.

[0020] 3) In the stirring mechanism, the first reduction motor drives the stirring shaft to rotate, the first stirring blade on the support plate stirs the middle area of ​​the vessel, and the second stirring blade on the annular ring stirs the inner and outer areas of the vessel, forming an all-round stirring that is coordinated inside and outside and runs through the top and bottom, reducing the stirring dead zone and making the phosphorus removal agent and water mix more fully and evenly.

[0021] 4) The sealing mechanism drives the sealing plate to reciprocate through a drive motor, turntable, pin, movable block and movable rod, so that the sealing plate abuts or separates from the lower end of the straight cylinder. When the sealing plate separates from the straight cylinder, the agent enters the reactor body through the straight cylinder; when the sealing plate seals the straight cylinder, the agent enters the reactor body through the arc tube, thereby realizing the release of solid phosphorus removal agent at different positions, which is conducive to enhancing the mixing effect. The sealing plate is made of rubber, which can also improve the sealing fit and buffering, and reduce impact and wear.

[0022] 5) A support frame is set on the upper part of the stirring shaft. The outer and bottom walls of the support frame are mesh structures. It can rotate synchronously with the stirring shaft and receive the solid phosphorus removal agent falling from the arc tube or straight cylinder. During the rotation, the agent is sprinkled to different positions inside the reactor body to achieve dynamic dispersion and further enhance the uniformity of mixing of the agent and water. Attached Figure Description

[0023] Appendix Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Appendix Figure 2 This is a schematic diagram of the internal structure of the vessel body in this invention.

[0025] Appendix Figure 3 This is a schematic diagram of the stirring mechanism in this invention.

[0026] Appendix Figure 4 This is a schematic diagram of the crushing mechanism in this invention.

[0027] Appendix Figure 5 This is a schematic diagram showing the positional relationship of the first crushing roller, the second crushing roller, and the third crushing roller in this invention.

[0028] Appendix Figure 6 This is a schematic diagram of the first crushing roller structure in this invention.

[0029] Appendix Figure 7This is a schematic diagram of the bottom structure of the vessel body in this invention.

[0030] Appendix Figure 8 This is a schematic diagram of the sealing mechanism in this invention.

[0031] Appendix Figure 9 This is a schematic diagram of the sealing mechanism from another perspective in this invention.

[0032] In the diagram: 1. Vessel body; 2. Vessel lid; 3. Support leg; 4. Stirring mechanism; 401. Stirring shaft; 402. First geared motor; 403. Support plate; 404. First stirring blade; 405. Annular ring; 406. Second stirring blade; 5. Crushing mechanism; 501. Crushing box; 502. Second geared motor; 503. First crushing roller; 5031. Crushing teeth; 5032. Crushed pieces; 504. Second crushing roller; 505. Third crushing roller; 506. Gear; 507. Synchronization mechanism. 508. Wheel; 509. Synchronous belt; 510. Protective cover; 511. Screen; 512. Straight cylinder; 513. Screw conveyor; 514. Material collection hood; 515. Feed pipe; 516. Discharge pipe; 517. Arc pipe; 6. Sealing mechanism; 601. Support plate; 602. Column; 603. Turntable; 604. Pin; 605. Movable block; 606. Movable rod; 607. Sealing plate; 608. Drive motor; 7. Bearing frame; 8. Liquid discharge pipe; 9. Liquid discharge valve; 10. Slag discharge valve. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-9 The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0035] like Figure 1 and Figure 2As shown, a phosphorus removal dosing device for wastewater treatment includes a vessel body 1 and a vessel cover 2. The vessel cover 2 is installed on the top of the vessel body 1 and has a water inlet pipe. A support leg 3 is installed below the vessel body 1. A slag discharge pipe is installed in the middle of the bottom of the vessel body 1 and a slag discharge valve 10 is installed on the slag discharge pipe. The vessel cover 2 is provided with a stirring mechanism 4 for mixing solid phosphorus removal agent with water. The vessel cover 2 is also provided with a crushing mechanism 5 for crushing solid phosphorus removal agent. The crushing mechanism 5 is located on one side of the stirring mechanism 4. A liquid outlet pipe 8 is installed inside the lower part of the vessel body 1.

[0036] like Figure 2 and Figure 7 As shown, the liquid outlet pipe 8 includes an annular pipe and a zigzag pipe connected to the annular pipe. The end of the zigzag pipe extends through the slag discharge pipe to the outside of the vessel body 1. A liquid outlet valve 9 is installed on the zigzag pipe located outside the vessel body 1. Multiple through holes are evenly opened at equal angles along the circumference of the top of the annular pipe. The liquid after the solid phosphorus removal agent is mixed with water is discharged into the sewage tank through the liquid outlet pipe 8. The liquid that cannot be discharged through the liquid outlet pipe 8 is discharged to the outside of the vessel body 1 through the slag discharge pipe.

[0037] like Figure 2 and Figure 3 As shown, the stirring mechanism 4 includes a first reduction motor 402, a stirring shaft 401, and a support plate 403. The stirring shaft 401 is rotatably mounted on the vessel cover 2, and the bottom end of the stirring shaft 401 extends to the lower part of the vessel body 1. There are multiple support plates 403, which are evenly distributed at equal distances along the axial direction of the stirring shaft 401. Multiple first stirring blades 404 are installed at equal angles in the circumferential direction of the support plate 403. The first stirring blades 404 are rectangular blades, vertically welded to the support plate 403, and the length of the first stirring blades 404 is greater than the thickness of the support plate 403. The first reduction motor 402 is mounted on the top of the vessel cover 2, and the output shaft of the first reduction motor 402 is connected to the top of the stirring shaft 401.

[0038] Furthermore, the stirring mechanism 4 also includes an annular ring 405 and a second stirring blade 406. There are two annular rings 405, which are respectively mounted on the stirring shaft 401 via connecting rods. The diameter of the annular ring 405 is larger than the diameter of the support plate 403. One annular ring 405 is located above the support plate 403 at the bottom of the stirring shaft 401, and the other annular ring 405 is located above the support plate 403 at the top of the stirring shaft 401. There are multiple second stirring blades 406, with their two ends respectively mounted on the two annular rings 405. The second stirring blades 406 are evenly distributed at equal angles along the circumference of the annular rings 405, and the second stirring blades 406 are generally long and flat.

[0039] During operation, the first reduction motor 402 drives the stirring shaft 401 to rotate. The support disk 403 located on the stirring shaft 401 and the annular ring 405 connected to the stirring shaft 401 rotate synchronously. When the support disk 403 rotates, it drives the first stirring blade 404 to stir the middle area of ​​the vessel body 1. When the annular ring 405 rotates, it drives the second stirring blade 406 to stir the inner and outer areas of the vessel body 1, thereby achieving all-round stirring inside the vessel body 1, which facilitates rapid and uniform mixing of phosphorus removal agent and water.

[0040] like Figure 2 , Figure 4 and Figure 5 As shown, the crushing mechanism 5 includes a crushing box 501, a second reduction motor 502, a first crushing roller 503, a second crushing roller 504, and a third crushing roller 505. The crushing box 501 is installed through the lid 2. A straight cylinder 511 is installed at the bottom of the crushing box 501. The crushing box 501 is welded together from three parts: an upper part is a truncated pyramid with a wider top and a narrower bottom; a middle part is a rectangular shell; and a lower part is a truncated pyramid with a rectangular top and a circular bottom. The dimensions of the upper and lower ends of the crushing box 501, the upper and lower ends of the middle part, and the upper end of the lower part are consistent to facilitate the entry and exit of the phosphorus removal agent. The first crushing roller 503, the second crushing roller 504, and the third crushing roller 505 are rotatably installed in the middle of the crushing box 501. Above, the first crushing roller 503 and the second crushing roller 504 are arranged in parallel, and the third crushing roller 505 is located below between the first crushing roller 503 and the second crushing roller 504. Gears 506 are installed at the ends of the first crushing roller 503 and the second crushing roller 504, and the two gears 506 are meshed together. Synchronous pulleys 507 are installed at the ends of the second crushing roller 504 and the third crushing roller 505, and the two synchronous pulleys 507 are connected by a synchronous belt 508. The gears 506, synchronous pulleys 507 and synchronous belt 508 are all located outside the crushing box 501. The second reduction motor 502 is installed outside the crushing box 501, and the output shaft of the second reduction motor 502 is connected to one end of the third crushing roller 505.

[0041] Furthermore, the crushing mechanism 5 also includes a screen 510 and a screw conveyor 512. The screen 510 is obliquely installed inside the crushing box 501 and located below the third crushing roller 505. One end of the screen 510 is fixedly connected to the inner wall of the crushing box 501, and a gap is left between the other end and the inner wall of the crushing box 501. The screw conveyor 512 is installed on the lid 2 and located on one side of the crushing box 501. The bottom of the screw conveyor 512 is connected to the crushing box 501 through a feed pipe 514. The screw conveyor 512 is connected to the upper part of the crushing box 501 through the discharge pipe 515. The feed pipe 514 and the discharge pipe 515 are both inclined, with the feed pipe 514 being higher on the left and lower on the right, and the discharge pipe 515 being lower on the left and higher on the right, to facilitate the flow of the dephosphorizing agent. A collection hood 513 is installed at the end of the feed pipe 514 away from the screw conveyor 512. The collection hood 513 is located at the lower part of the screen 510 near the end of the feed pipe 514 and is used to receive the dephosphorizing agent rolling off the screen 510.

[0042] The working process of the crushing mechanism 5 is as follows: The second reduction motor 502 drives the third crushing roller 505 to rotate. The third crushing roller 505 drives the second crushing roller 504 to rotate through the synchronous pulley 507 and the synchronous belt 508. The second crushing roller 504 drives the first crushing roller 503 to rotate through the gear 506. At this time, the rotation direction of the first crushing roller 503 is opposite to that of the second crushing roller 504, and the rotation direction of the third crushing roller 505 is the same as that of the second crushing roller 504, thereby realizing the synchronous rotation of the first crushing roller 503, the second crushing roller 504 and the third crushing roller 505. After the solid dephosphorizing agent enters the crushing box 501, the blocky dephosphorizing agent first contacts the first crushing roller 503 and the second crushing roller 504. After being crushed by the first crushing roller 503 and the second crushing roller 504, it is then pushed towards... The solid phosphorus removal agent moves downwards; simultaneously, a portion of the solid phosphorus removal agent moves downwards and comes into contact with the third crushing roller 505, where it is crushed again by the third crushing roller 505, reducing the particle size of the lumpy phosphorus removal agent. The unconsolidated solid phosphorus removal agent can pass smoothly through the first crushing roller 503, the second crushing roller 504, and the third crushing roller 505 without being excessively crushed. The downward-moving solid phosphorus removal agent falls onto the screen 510, while the lumpy solid phosphorus removal agent cannot pass through the screen 510 and moves along the inclined screen 510 to the collection hood 513. The lumpy solid phosphorus removal agent in the collection hood 513 then passes through the feed pipe 514, the screw conveyor 512, and the discharge pipe 515 to re-enter the crushing box 501 for further crushing, thereby ensuring that the solid phosphorus removal agent passing through the screen 510 has a uniform particle size and improving its mixing effect with water.

[0043] like Figure 4 , Figure 5 and Figure 6As shown, the first crushing roller 503, the second crushing roller 504, and the third crushing roller 505 have the same structure, each including crushing teeth 5031 and crushing blocks 5032. There are multiple crushing teeth 5031 and multiple crushing blocks 5032, which are evenly distributed along the circumference of the first crushing roller 503, the second crushing roller 504, and the third crushing roller 505. The crushing teeth 5031 and crushing blocks 5032 on the first crushing roller 503, the second crushing roller 504, and the third crushing roller 505 are arranged along the transverse direction. The crushing rollers are evenly staggered in the direction of crushing, and the crushing teeth 5031 and crushing blocks 5032 on the first crushing roller 503 correspond to the crushing blocks 5032 and crushing teeth 5031 on the second crushing roller 504. The crushing blocks 5032 are rectangular blocks, and the crushing teeth 5031 include a vertical rod and a boss provided on the vertical rod. The boss is a truncated pyramid that is narrow at the top and wide at the bottom. There is at least one boss. Through the cooperation of the crushing teeth 5031 and the crushing blocks 5032, the blocky solid phosphorus removal agent can be fully crushed, thereby improving the crushing efficiency of the blocky solid phosphorus removal agent.

[0044] like Figure 4 As shown, the gear 506, the synchronous pulley 507 and the synchronous belt 508 are provided with a protective cover 509. The protective cover 509 is installed on the outer wall of the crushing box 501. The protective cover 509 can protect the gear 506, the synchronous pulley 507 and the synchronous belt 508 and extend their service life.

[0045] like Figure 2 , Figure 4 , Figure 8 and Figure 9As shown, an arc-shaped tube 516 is also installed on the lower side wall of the straight cylinder 511. The end of the arc-shaped tube 516 and the end of the straight cylinder 511 are arranged symmetrically about the axis of the straight cylinder 511. A sealing mechanism 6 is also provided below the straight cylinder 511. The sealing mechanism 6 includes a support plate 601, a column 602, a turntable 603, a pin 604, a movable block 605, a movable rod 606, a sealing plate 607, and a drive motor 608. The support plate 601 is installed on the outer side wall of the vessel body 1. The column 602 is installed on the top of the support plate 601. The drive motor 608 is installed on one side of the column 602. The turntable 603 is located on the column 602 away from the drive motor 608. On one side of 8, the output shaft of the drive motor 608 passes through the column 602 and is connected to the turntable 603. A pin 604 is eccentrically installed on the side of the turntable 603 away from the column 602. A movable block 605 is provided around the pin 604. The movable block 605 is a hollow elliptical structure. The pin 604 extends into the interior of the movable block 605 and abuts against the inner wall of the movable block 605. The movable rod 606 is installed on the left side of the movable block 605. The movable rod 606 passes through the side wall of the vessel body 1 and extends into the interior of the vessel body 1. The sealing plate 607 is installed at the end of the movable rod 606 located inside the vessel body 1. The sealing plate 607 can abut against the lower end of the straight cylinder 511, and the sealing plate 607 is made of rubber.

[0046] The working process of the sealing mechanism 6 is as follows: The drive motor 608 drives the turntable 603 to rotate, and the pin 604 located on the turntable 603 rotates accordingly. The pin 604 abuts inside the movable block 605, thereby driving the movable block 605 to move back and forth. The movable rod 606 connected to the movable block 605 drives the sealing plate 607 to move back and forth. When the sealing plate 607 is not in contact with the lower end of the straight cylinder 511, the solid dephosphorizing agent falling from the crushing box 501 enters the interior of the reactor body 1 through the straight cylinder 511. When the sealing plate 607 is in complete contact with the lower end of the straight cylinder 511, the solid dephosphorizing agent enters the interior of the reactor body 1 through the arc-shaped tube 516, thereby realizing the release of the solid dephosphorizing agent at different positions, which is beneficial to enhancing the mixing effect of the solid dephosphorizing agent.

[0047] like Figure 2 and Figure 3 As shown, a support frame 7 is provided on the upper part of the stirring shaft 401. The support frame 7 is generally annular and has a groove inside. The support frame 7 is installed on the stirring shaft 401 through a connecting rod. The outer wall and bottom wall of the support frame 7 are both mesh structures. The support frame 7 rotates synchronously with the stirring shaft 401. At the same time, it can receive the solid dephosphorizing agent falling from the arc-shaped tube 516 and the straight cylinder 511. During the rotation, the solid dephosphorizing agent is sprinkled to different positions inside the reactor body 1, further enhancing the mixing effect of the solid dephosphorizing agent.

[0048] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A phosphorus removal dosing device for wastewater treatment, comprising a vessel body and a vessel lid, wherein the vessel lid is installed on the top of the vessel body, an inlet pipe is installed on the vessel lid, support legs are installed below the vessel body, a slag discharge pipe is installed at the middle of the bottom of the vessel body, a slag discharge valve is installed on the slag discharge pipe, and a stirring mechanism for mixing solid phosphorus removal agent with water is provided on the vessel lid, characterized in that, The kettle lid is also equipped with a crushing mechanism for crushing solid phosphorus removal agents. The crushing mechanism is located on one side of the stirring mechanism. A liquid outlet pipe is installed inside the lower part of the kettle body. The liquid outlet pipe includes an annular pipe and a zigzag pipe connected to the annular pipe. The end of the zigzag pipe extends through the slag discharge pipe to the outside of the kettle body. A liquid outlet valve is installed on the zigzag pipe located outside the kettle body. Multiple through holes are evenly opened at equal angles in the circumferential direction at the top of the annular pipe.

2. The phosphorus removal dosing device for wastewater treatment according to claim 1, characterized in that, The stirring mechanism includes a first geared motor, a stirring shaft, and a support plate. The stirring shaft is rotatably mounted on the vessel lid, and its bottom end extends to the lower part of the vessel body. There are multiple support plates, which are evenly distributed vertically along the stirring shaft at equal intervals. Multiple first stirring blades are installed at equal angles on the circumference of the support plate. The first stirring blades are rectangular blades vertically welded to the support plate, and the length of the first stirring blades is greater than the thickness of the support plate. The first geared motor is mounted on the top of the vessel lid, and the output shaft of the first geared motor is connected to the top of the stirring shaft.

3. The phosphorus removal dosing device for wastewater treatment according to claim 2, characterized in that, The stirring mechanism also includes annular rings and second stirring blades. There are two annular rings, which are mounted on the stirring shaft via connecting rods. The diameter of the annular rings is larger than the diameter of the support plate. One annular ring is located above the support plate at the bottom of the stirring shaft, and the other annular ring is located above the support plate at the top of the stirring shaft. There are multiple second stirring blades, which are mounted on the two annular rings at their two ends respectively. The second stirring blades are evenly distributed at equal angles along the circumference of the annular rings, and the second stirring blades are generally long and flat.

4. The phosphorus removal dosing device for wastewater treatment according to claim 1, characterized in that, The crushing mechanism includes a crushing box, a second reduction motor, a first crushing roller, a second crushing roller, and a third crushing roller. The crushing box is installed through the lid of the vessel. A straight cylinder is installed at the bottom of the crushing box. The crushing box is welded together from three parts: upper, middle, and lower. The upper part of the crushing box is a truncated pyramid with a wider top and a narrower bottom. The middle part is a rectangular shell. The lower part is a truncated pyramid with a rectangular top and a circular bottom. The upper and lower ends of the upper part, the upper and lower ends of the middle part, and the upper end of the lower part of the crushing box have the same dimensions. The first, second, and third crushing rollers are rotatably installed above the middle part of the crushing box. The first and second crushing rollers are arranged in parallel. The third crushing roller is located below the first and second crushing rollers. Gears are installed at the ends of the first and second crushing rollers. The two gears mesh and are connected. Synchronous pulleys are installed at the ends of the second and third crushing rollers. The two synchronous pulleys are connected by a synchronous belt. The gears, synchronous pulleys, and synchronous belt are all located outside the crushing box. The second reduction motor is installed outside the crushing box. The output shaft of the second reduction motor is connected to one end of the third crushing roller.

5. A phosphorus removal dosing device for wastewater treatment according to claim 4, characterized in that, The crushing mechanism also includes a screen and a screw conveyor. The screen is obliquely installed inside the crushing box, below the third crushing roller. One end of the screen is fixedly connected to the inner wall of the crushing box, and the other end has a gap with the inner wall. The screw conveyor is installed on the lid and is located on one side of the crushing box. The bottom of the screw conveyor is connected to the middle of the crushing box through a feed pipe, and the top of the screw conveyor is connected to the upper part of the crushing box through a discharge pipe. Both the feed pipe and the discharge pipe are inclined, with the feed pipe higher on the left and lower on the right, and the discharge pipe lower on the left and higher on the right, to facilitate the flow of the dephosphorizing agent. A collection hood is installed at the end of the feed pipe away from the screw conveyor. The collection hood is located at the lower part of the end of the screen closest to the feed pipe and is used to collect the dephosphorizing agent rolling off the screen.

6. A phosphorus removal dosing device for wastewater treatment according to claim 4, characterized in that, The first, second, and third crushing rollers have the same structure and each includes crushing teeth and crushing blocks. There are multiple crushing teeth and crushing blocks, which are evenly distributed along the circumference of the first, second, and third crushing rollers. The crushing teeth and crushing blocks on the first, second, and third crushing rollers are evenly staggered in the transverse direction. The crushing teeth and crushing blocks on the first crushing roller correspond to the crushing blocks and crushing teeth on the second crushing roller. The crushing blocks are rectangular blocks. Each crushing tooth includes a vertical rod and a boss provided on the vertical rod. The boss is a truncated pyramid that is narrow at the top and wide at the bottom. There is at least one boss.

7. A phosphorus removal dosing device for wastewater treatment according to claim 4, characterized in that, The gears, timing pulleys, and timing belts are equipped with protective covers, which are installed on the outer wall of the crushing chamber.

8. A phosphorus removal dosing device for wastewater treatment according to claim 4, characterized in that, An arc-shaped tube is also installed on the lower side wall of the straight cylinder. The end of the arc-shaped tube is symmetrical to the end of the straight cylinder about the stirring axis. A sealing mechanism is also provided below the straight cylinder. The sealing mechanism includes a support plate, a turntable, a movable rod, a sealing plate, and a drive motor. The support plate is installed on the outer side wall of the vessel body. A column is installed on the top of the support plate. The drive motor is installed on one side of the column. The turntable is located on the side of the column away from the drive motor. The output shaft of the drive motor passes through the column and connects to the turntable. A pin is eccentrically installed on the side of the turntable away from the column. A movable block is provided around the pin. The movable block has a hollow elliptical structure. The pin abuts against the inside of the movable block. The movable rod is installed on the left side of the movable block and passes through the interior of the vessel body. The sealing plate is installed at the end of the movable rod located inside the vessel body. The sealing plate can abut against the lower end of the straight cylinder.

9. A phosphorus removal dosing device for wastewater treatment according to claim 2, characterized in that, The upper part of the stirring shaft is provided with a support frame. The support frame is generally annular and has a groove inside. The support frame is installed on the stirring shaft through a connecting rod. The outer wall and bottom wall of the support frame are both mesh structures.

10. A phosphorus removal dosing device for wastewater treatment according to claim 8, characterized in that, The sealing plate is made of rubber.

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