Urban sewage into lake outlet purification system

Abstract

The application discloses a purification system for urban sewage outlet into a lake, which comprises a purification tank and a water purification unit. A first partition plate and a second partition plate are arranged in the purification tank respectively. The first partition plate and the second partition plate form a primary purification area and a secondary purification area in the purification tank. The water purification unit comprises a solid-liquid separation mechanism, a mixing mechanism, a primary purification mechanism and a secondary purification mechanism. The solid-liquid separation mechanism comprises a crushing part, a screen and a driving part. The crushing part is installed in the purification tank and is used for crushing solid impurities in sewage in the purification tank. The screen is installed in the purification tank and is used for separating the solid impurities in the sewage. The application solves the technical problem that the sewage purification system in the prior art has poor solid-liquid separation effect on sewage, and the subsequent sewage purification means is single, so that a large amount of harmful substances are still left in the discharged water source, and the river environment is seriously polluted.

Description

Technical Field

[0001] This invention relates to the field of wastewater purification technology, specifically to a wastewater discharge outlet purification system for urban lakes. Background Technology

[0002] Urban drainage systems are engineering facilities systems for treating and discharging urban sewage and rainwater. They are a component of urban public utilities, and urban drainage system planning is an integral part of urban master planning. Urban drainage systems typically consist of drainage pipes and sewage treatment plants, with treated sewage being discharged into rivers.

[0003] To achieve wastewater treatment, Chinese invention patent application CN116002809A proposed "an urban wastewater treatment device and treatment method." This device can more effectively remove solid impurities and oil from wastewater, thereby reducing the burden on sewage pipes. However, this device is only suitable for treating a small amount of wastewater in cities. Urban wastewater contains a large number of solid impurities and harmful substances, not just oil. This device cannot separate solid impurities from urban wastewater, and even after separation, it cannot effectively purify the wastewater multiple times, resulting in the final discharged wastewater still containing a large amount of harmful substances, thus polluting the river environment.

[0004] Therefore, we propose a purification system for urban sewage discharge outlets into lakes. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a city sewage discharge outlet purification system for lakes. This system solves the technical problem that existing sewage purification systems have poor solid-liquid separation effects and limited subsequent sewage purification methods, resulting in a large amount of harmful substances remaining in the discharged water, which seriously pollutes the river environment.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] A city sewage discharge outlet purification system includes a purification tank and a water purification unit;

[0008] The purification chamber is provided with a first partition and a second partition; the first partition and the second partition form a primary purification area and a secondary purification area inside the purification chamber;

[0009] The water purification unit includes a solid-liquid separation mechanism, a mixing mechanism, a primary purification mechanism, and a secondary purification mechanism; the solid-liquid separation mechanism includes a pulverizing section, a screen, and a driving section; the pulverizing section is installed inside the purification tank and is used to pulverize solid impurities in the wastewater inside the purification tank; the screen is installed inside the purification tank and is used to separate solid impurities in the wastewater inside the purification tank.

[0010] The mixing mechanism is located below the pulverizing section and is used to stir the separated liquid; the driving unit is used to drive the pulverizing section and the mixing mechanism to operate;

[0011] The primary purification unit and the secondary purification unit are respectively arranged in the primary purification area and the secondary purification area, and are used to purify the sewage multiple times.

[0012] In one specific embodiment, the side of the first partition facing the screen is provided with several buffer grooves; the purification box is provided with a water inlet, and several drain pipes are arranged in the secondary purification area.

[0013] In one specific embodiment, the pulverizing unit includes a first pulverizing cylinder and a second pulverizing cylinder; the first pulverizing cylinder and the second pulverizing cylinder are arranged from top to bottom inside the purification chamber; one axial end of each of the first pulverizing cylinder and the second pulverizing cylinder passes through the purification chamber and is connected to the driving unit.

[0014] In one specific embodiment, the drive unit includes a first motor, a first gear, a second gear, a third gear, a fourth gear, and a transmission belt; the first and second grinding cylinders are respectively connected to the first gear and the second gear at one end of the passage through the purification box; the output end of the first motor is connected to the first grinding cylinder, and the second gear meshes with the first gear below; the third gear is fixed on the second grinding cylinder and maintains a distance from the second gear; the fourth gear is connected to the mixing mechanism, and the transmission belt drives between the third gear and the fourth gear.

[0015] In one specific embodiment, the mixing mechanism includes a mixing rod and a plurality of stirring blades; the mixing rod is axially arranged inside the purification chamber and close to the first partition; the plurality of stirring blades are circumferentially arranged around the outer periphery of the mixing rod; one axial end of the mixing rod passes through the purification chamber and is connected to the fourth gear.

[0016] In one specific embodiment, the primary purification mechanism includes a water guide pipe, a purification pipe, a power end, and a water pump; the water guide pipe is used to extract sewage, and one end of the water guide pipe is rotatably connected to the purification pipe, which is inclinedly arranged within the primary purification area; the power end is mounted on the first partition and is used to drive the purification pipe to rotate circumferentially; the pumping end of the water pump is connected to the end of the purification pipe and is used to extract sewage and pour the sewage into the secondary purification area.

[0017] In one specific embodiment, a plurality of purification cylinders are installed inside the purification pipe; rotating bearings are arranged at both ends of the purification pipe along its axial direction; two of the rotating bearings are rotatably connected to the water guide pipe and the water pump's pumping end, respectively; the rotating bearings are connected to the first partition plate via brackets.

[0018] In one specific embodiment, the power end includes a second motor, a main gear, and a secondary gear; the second motor is mounted on the first partition, and the output end of the second motor is connected to the main gear; the outer periphery of the main gear meshes with the secondary gear fixed on the purification pipe.

[0019] In one specific embodiment, the secondary purification mechanism includes a plurality of filters, wherein the filters are any one or more of activated carbon filters and bamboo charcoal filters.

[0020] In one specific embodiment,

[0021] S1. Pour the wastewater to be purified into the purification tank through the inlet. The impurities in the wastewater are crushed by the crushing part, and the solid and liquid are separated by the filter screen.

[0022] S2. The separated liquid flows from the first partition into the mixing mechanism, where the wastewater is mixed and stirred with the neutralizing agent.

[0023] S3. The mixed liquid is pumped into the purification pipe by a water pump and driven by the power end to rotate the purification pipe in a circumferential direction to increase the reaction time of the sewage inside the purification pipe. After the sewage is purified once, it is introduced into the secondary purification mechanism, and after secondary purification, it is discharged to the outside.

[0024] Compared with the prior art, the beneficial effects of the present invention include:

[0025] Compared with the prior art, this invention, when sewage enters the purification tank, uses a pulverizing section in the solid-liquid separation mechanism to pulverize solid impurities in the sewage, preventing blockages caused by excessively large solid impurities. Next, a screen separates the solid matter from the sewage, allowing the liquid to pass through the screen and contact the first partition. Guided by the first partition, the liquid flows into the mixing mechanism area. The driving unit then activates the mixing mechanism, causing the sewage to react with the neutralizing agent, weakening the acidic components in the sewage. After passing through the primary and secondary purification mechanisms, the sewage is then discharged, thereby reducing urban sewage pollution of rivers and effectively improving the purification efficiency of the entire system. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0027] Figure 2This is a schematic diagram of the primary purification mechanism of the present invention;

[0028] Figure 3 This is a schematic diagram of the drive unit structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the purification tube of the present invention.

[0030] In the diagram: 1. Purification box; 11. First partition; 111. Buffer tank; 12. Second partition; 13. Water inlet; 14. Drain pipe; 2. Water purification unit; 3. Solid-liquid separation mechanism; 31. Crushing section; 311. First crushing cylinder; 312. Second crushing cylinder; 32. Screen; 33. Drive unit; 331. First motor; 332. First gear; 333. Second gear; 334. Third gear; 335. Fourth gear; 336. Transmission belt; 4. Mixing mechanism; 41. Mixing rod; 42. Stirring blade; 5. Primary purification mechanism; 51. Water guide pipe; 52. Purification pipe; 521. Rotating bearing; 522. Support; 53. Power end; 531. Secondary motor; 532. Main gear; 533. Secondary gear; 54. Water pump; 6. Secondary purification mechanism; 61. Filter screen. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0032] Please see Figure 1 The present invention provides a purification system for urban sewage discharge outlets into lakes, comprising a purification box 1 and a water purification unit 2.

[0033] The purification chamber 1 is provided with a first partition 11 and a second partition 12; the first partition 11 and the second partition 12 form a primary purification area and a secondary purification area inside the purification chamber 1.

[0034] The water purification unit 2 includes a solid-liquid separation mechanism 3, a mixing mechanism 4, a primary purification mechanism 5, and a secondary purification mechanism 6. The solid-liquid separation mechanism 3 includes a pulverizing part 31, a screen 32, and a driving part 33. The pulverizing part 31 is installed inside the purification tank 1 and is used to pulverize solid impurities in the wastewater inside the purification tank 1. The screen 32 is installed inside the purification tank 1 and is used to separate solid impurities in the wastewater inside the purification tank 1.

[0035] The mixing mechanism 4 is located below the pulverizing section 31 and is used to stir the separated liquid; the driving section 33 is used to drive the pulverizing section 31 and the mixing mechanism 4 to operate.

[0036] The primary purification unit 5 and the secondary purification unit 6 are respectively arranged in the primary purification area and the secondary purification area, and are used to purify the sewage multiple times.

[0037] Workers pour wastewater into the purification tank 1. The pulverizing section 31 in the solid-liquid separation mechanism 3 pulverizes the solid impurities in the wastewater. The pulverized impurities remain in the purification tank 1. When they accumulate to a certain extent, they are manually collected and disposed of by the workers. The pulverizing section 31 prevents the solid impurities from becoming too large and causing blockage inside the tank. Next, an arc-shaped screen 32 is used to separate the solid matter in the wastewater, allowing the liquid to pass through the screen 32 and come into contact with the first partition 11. Since the first partition 11 is inclined, the wastewater flows into the area where the mixing mechanism 4 is located under the guidance of the first partition 11. The driving section 33 drives the mixing mechanism 4 to operate, causing it to react with the neutralizing solution, weakening the acidic components in the wastewater. After passing through the primary purification mechanism 5 and the secondary purification mechanism 6, the wastewater is discharged, thereby reducing the pollution of urban sewage to rivers and effectively improving the purification efficiency of the entire purification system.

[0038] To improve the working efficiency of cleanroom 1, please refer to [link / reference]. Figure 1 In a preferred embodiment, the side of the first partition 11 facing the screen 32 is provided with a plurality of buffer grooves 111; the purification box 1 is provided with a water inlet 13, and a plurality of drain pipes 14 are arranged in the secondary purification area.

[0039] Several buffer grooves 111 are provided on the first partition 11 to slow down the flow speed of sewage, thereby avoiding excessive impact force of vertical flow, which could damage the mixing mechanism 4. By providing an inlet 13 on the purification tank 1, sewage can be easily concentrated and introduced into the purification tank 1. Furthermore, three drain pipes 14 are arranged in the secondary purification area to facilitate the discharge of purified sewage.

[0040] To improve the operating efficiency of the crushing section 31 and the mixing mechanism 4, please refer to... Figures 1-3In a preferred embodiment, the pulverizing unit 31 includes a first pulverizing cylinder 311 and a second pulverizing cylinder 312; the first pulverizing cylinder 311 and the second pulverizing cylinder 312 are arranged from top to bottom inside the purification chamber 1; one axial end of each of the first pulverizing cylinder 311 and the second pulverizing cylinder 312 penetrates the purification chamber 1 and is connected to a drive unit 33, the drive unit 33 including a first motor 331, a first gear 332, a second gear 333, a third gear 334, a fourth gear 335 and a transmission belt 336; the first gear 332 and the second gear 333 are respectively connected to the ends of the first pulverizing cylinder 311 and the second pulverizing cylinder 312 that penetrate the purification chamber 1; the first motor 331... The output end is connected to the first crushing cylinder 311. The second gear 333 meshes with the lower part of the first gear 332. The third gear 334 is fixed on the second crushing cylinder 312 and keeps a distance from the second gear 333. The fourth gear 335 is connected to the mixing mechanism 4. A transmission belt 336 drives the third gear 334 and the fourth gear 335. The mixing mechanism 4 includes a mixing rod 41 and several stirring blades 42. The mixing rod 41 is axially arranged in the purification box 1 and close to the first partition 11. Several stirring blades 42 are circumferentially arranged on the outer periphery of the mixing rod 41. One axial end of the mixing rod 41 passes through the purification box 1 and is connected to the fourth gear 335.

[0041] The first motor 331 drives the first crushing cylinder 311 to operate within the purification tank 1. Since the first crushing cylinder 311 is fixed with a first gear 332, and the lower end of the first gear 332 meshes with a second gear 333, when the first motor 331 drives the first gear 332 to operate, it simultaneously drives the second gear 333 to operate, thereby realizing the operation of the first crushing cylinder 311 and the second crushing cylinder 312 to effectively crush solid impurities in the sewage. Furthermore, a third gear 334 is connected to the second crushing cylinder 312. The third gear 334 and the fourth gear 335 are connected by a transmission belt 336, which simultaneously drives the mixing rod 41 and the stirring blade 42 within the purification tank 1 to stir the sewage, allowing the sewage to fully react with the neutralization solution, thereby achieving a better neutralization effect.

[0042] To further improve the wastewater purification efficiency of the system, please refer to [link / reference]. Figure 2 , Figure 3 and Figure 4In a preferred embodiment, the primary purification mechanism 5 includes a water guide pipe 51, a purification pipe 52, a power end 53, and a water pump 54. The water guide pipe 51 is used to extract sewage, and one end of the water guide pipe 51 is rotatably connected to the purification pipe 52, which is inclinedly arranged within the primary purification area. The power end 53 is mounted on the first partition 11 and is used to drive the purification pipe 52 to rotate circumferentially. The pumping end of the water pump 54 is connected to the end of the purification pipe 52 and is used to extract sewage and pour it into the secondary purification area. Several purification cylinders are installed inside the purification pipe 52. Rotary bearings are arranged at both ends of the purification pipe 52 along its axial direction. 521; Two rotating bearings 521 are rotatably connected to the water guide pipe 51 and the water pump 54 respectively; the rotating bearings 521 are connected to the first partition 11 through the bracket 522; the power end 53 includes a second motor 531, a main gear 532 and a secondary gear 533; the second motor 531 is mounted on the first partition 11, and the output end of the second motor 531 is connected to the main gear 532; the outer periphery of the main gear 532 meshes with the secondary gear 533 fixed on the purification pipe 52; the secondary purification mechanism 6 includes a number of filter screens 61, and the filter screens 61 are any one or more of activated carbon filter screens and bamboo charcoal filter screens.

[0043] The first partition 11 and the second partition 12 are both arranged at an angle inside the purification tank 1, forming a primary purification area and a secondary purification area, both of which are inclined structures. This facilitates the inclined arrangement of the purification pipe 52. The end of the purification pipe 52 is connected to the water guide pipe 51 through a rotating bearing 521. The water guide pipe 51 is used to extract the liquid mixed by the mixing mechanism 4. The other end of the purification pipe 52 is also connected to the water pump 54 through the rotating bearing 521 and the pipe body. The suction generated by the water pump 54 draws the sewage into the purification pipe 52. Since the purification pipe 52 is inclined, this extends the sewage... During the reaction time inside the purification pipe 52, the second motor 531 drives the main gear 532 to rotate. Through the cooperation of the main gear 532 and the auxiliary gear 533, the purification pipe 52 is rotated circumferentially, so that the sewage can react better with the purification cylinder inside the purification pipe 52, achieving a better purification effect. The liquid after primary purification is introduced into the secondary purification area by the water pump 54, and after being filtered layer by layer by several activated carbon filters, it is discharged out through the drain pipe 14, thus ensuring that the discharged liquid does not contain a large amount of harmful substances, thereby preventing river pollution.

[0044] To help staff become familiar with the operating procedures, please refer to [link / reference]. Figure 1 In a preferred embodiment, the operation of this device includes the following steps:

[0045] S1. The wastewater to be purified is poured into the purification tank 1 through the inlet 13. At the same time, the first motor 331 is started. The first motor 331 drives the first crushing cylinder 311 to rotate. While the first crushing cylinder 311 is rotating, the first gear 332 drives the second gear 333 to rotate. When the second gear 333 rotates, it drives the second crushing cylinder 312 to rotate. Through the cooperation of the first crushing cylinder 311 and the second crushing cylinder 312, the solid waste in the wastewater is crushed. Secondly, the arc-shaped screen 32 can effectively separate solid and liquid, which is convenient for subsequent separate purification treatment of wastewater.

[0046] S2. The separated liquid flows from the first partition 11 into the mixing mechanism 4. Several buffer grooves 111 are arranged on the first partition 11 to slow down the flow speed of the water, so that its impact force will not directly hit the mixing mechanism 4. Several stirring blades 42 are fixedly connected to the mixing rod 41, and the end of the mixing rod 41 is connected to the fourth gear 335. The end of the second crushing cylinder 312 is connected to the third gear 334. The third gear 334 and the fourth gear 335 are connected by a transmission belt 336. Therefore, when the first motor 331 is running, the mixing rod 41 also starts to drive the stirring blades 42 to mix the sewage, so that the neutralizing solution and the sewage can react fully.

[0047] S3. The mixed liquid is pumped into the purification pipe 52 by the water pump 54 and driven to rotate circumferentially by the power end 53 to allow the wastewater to react inside the purification pipe 52. After the first purification, the wastewater is introduced into the secondary purification mechanism 6 and discharged to the outside after the second purification.

[0048] To better understand this invention, the following is combined with... Figures 1-4 The working process of the urban sewage discharge outlet purification system of the present invention will be described in detail below: In use, the staff pours the sewage to be purified into the purification tank 1 from the inlet 13 and starts the first motor 331. The first motor 331 drives the first crushing cylinder 311 to rotate. While the first crushing cylinder 311 is rotating, it drives the second gear 333 to rotate through the first gear 332. When the second gear 333 rotates, it drives the second crushing cylinder 312 to rotate synchronously. Through the cooperation of the first crushing cylinder 311 and the second crushing cylinder 312, the solid waste in the sewage is crushed. Secondly, the arc-shaped screen 32 can effectively separate solid and liquid, which facilitates the subsequent separate purification treatment of sewage.

[0049] The separated liquid flows from the first partition 11 into the mixing mechanism 4. Several buffer grooves 111 are arranged on the first partition 11 to slow down the flow speed of the water, so that its impact force will not directly hit the mixing mechanism 4. Several stirring blades 42 are fixedly connected to the mixing rod 41, and the end of the mixing rod 41 is connected to the fourth gear 335. The end of the second crushing cylinder 312 is connected to the third gear 334. The third gear 334 and the fourth gear 335 are connected by a transmission belt 336. Therefore, when the first motor 331 is running, the mixing rod 41 also starts to drive the stirring blades 42 to mix the sewage, so that the neutralizing solution and the sewage can react fully.

[0050] The mixed liquid is pumped into the purification pipe 52 by the water pump 54. The first partition 11 and the second partition 12 are both arranged at an angle within the purification tank 1, forming both the primary and secondary purification areas, which are also sloped structures. This facilitates the inclined arrangement of the purification pipe 52. The end of the purification pipe 52 is connected to the water guide pipe 51 via a rotating bearing 521. The water guide pipe 51 is used to extract the liquid mixed by the mixing mechanism 4. The other end of the purification pipe 52 is also connected to the water pump 54 via the rotating bearing 521 and the pipe body. The suction generated by the pump 54 draws the wastewater into the purification pipe 52. Because the purification pipe 52 is inclined... This arrangement extends the reaction time of the wastewater within the purification pipe 52. Simultaneously, the second motor 531 drives the main gear 532 to rotate. Through the cooperation of the main gear 532 and the auxiliary gear 533, the purification pipe 52 rotates circumferentially, allowing the wastewater to react better with the purification cylinder inside the purification pipe 52, achieving a better purification effect. The liquid after primary purification is pumped into the secondary purification area by the water pump 54, and after being filtered layer by layer by several activated carbon filters, it is discharged out through the drain pipe 14, thus ensuring that the discharged liquid does not contain a large amount of harmful substances, thereby preventing river pollution.

[0051] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A purification system for urban sewage outfall into a lake, characterized in that: The water purification device comprises a purification tank and a water purification unit; The purification tank is provided with a first partition plate and a second partition plate respectively; the lower part of the first partition plate and the lower part of the second partition plate form a primary purification area and a secondary purification area respectively in the purification tank; the first partition plate and the second partition plate are arranged in a horizontal direction and are inclined in the purification tank, so that the primary purification area and the secondary purification area are also inclined surfaces; The water purification unit comprises a solid-liquid separation mechanism, a mixing mechanism, a primary purification mechanism and a secondary purification mechanism; the solid-liquid separation mechanism comprises a crushing part, a screen and a driving part; the crushing part is installed in the purification tank and is used for crushing solid impurities in sewage in the purification tank; the screen is installed in the purification tank and is used for separating solid impurities in sewage in the purification tank; The mixing mechanism is arranged below the crushing part and is used for stirring the separated liquid; the driving part is used for driving the crushing part and the mixing mechanism to operate; The primary purification mechanism and the secondary purification mechanism are arranged in the primary purification area and the secondary purification area respectively and are used for purifying sewage for multiple times; The primary purification mechanism comprises a water guide pipe, a purification pipe, a power end and a water pump; the water guide pipe is used for pumping sewage; one end of the water guide pipe is rotatably connected with the purification pipe; the purification pipe is arranged in the primary purification area; the power end is installed on the first partition plate and is used for driving the purification pipe to rotate in a circumferential direction; the water pumping end of the water pump is communicated with the tail end of the purification pipe and is used for pumping sewage and pouring the sewage into the secondary purification area; The primary purification mechanism and the secondary purification mechanism are arranged in a horizontal direction and are inclined in sequence on one side of the solid-liquid separation mechanism and the mixing mechanism; the sewage crushed by the crushing part and separated by the screen flows from the first partition plate to the mixing mechanism below the first partition plate; the mixed sewage is pumped into the primary purification mechanism from the bottom of the primary purification mechanism by the water pump, enters the top of the secondary purification mechanism from the top of the primary purification mechanism and is discharged from the bottom of the secondary purification mechanism.

2. The purification system for urban sewage outlet into lake according to claim 1, characterized in that: The first partition plate is provided with a plurality of buffer grooves on the side facing the screen; the purification tank is provided with a water inlet; a plurality of drainage pipes are arranged in the secondary purification area.

3. The purification system for urban sewage outlet into lake according to claim 1, characterized in that: The crushing part comprises a first crushing cylinder and a second crushing cylinder; the first crushing cylinder and the second crushing cylinder are arranged in the purification tank from top to bottom; one end of the first crushing cylinder and one end of the second crushing cylinder are penetrated through the purification tank and are connected with the driving part.

4. The purification system for urban sewage outlet into lake according to claim 3, characterized in that: The driving part comprises a first motor, a first gear, a second gear, a third gear, a fourth gear and a transmission belt; one end of the first crushing cylinder and one end of the second crushing cylinder are connected with the first gear and the second gear respectively; the output end of the first motor is connected with the first crushing cylinder; the second gear is engaged below the first gear; the third gear is fixed on the second crushing cylinder and is kept a distance from the second gear; the fourth gear is connected with the mixing mechanism; the transmission belt is transmissionally connected between the third gear and the fourth gear.

5. The purification system for urban sewage outlet into lake according to claim 4, characterized in that: The mixing mechanism comprises a mixing rod and a plurality of stirring blades; the mixing rod is arranged in the purification tank along a horizontal axis and close to the first partition plate; the plurality of stirring blades are arranged circumferentially on the outer periphery of the mixing rod; and an axial end of the mixing rod penetrates through the purification tank and is connected with the fourth gear.

6. The purification system for urban sewage outlet into lake according to claim 5, characterized in that: A plurality of purification cylinders are installed inside the purification pipe; rotating bearings are arranged on the two axial ends of the purification pipe; the two rotating bearings are respectively rotatably connected with the water guide pipe and the water pumping end of the water pump; and the rotating bearings are connected to the first partition plate through a support.

7. The purification system for urban sewage outlet into lake according to claim 5, characterized in that: The power end comprises a second motor, a main gear and a secondary gear; the second motor is installed on the first partition plate, the output end of the second motor is connected with the main gear; and the outer periphery of the main gear is engaged with the secondary gear fixed on the purification pipe.

8. The purification system for urban sewage outlet into lake according to claim 1, characterized in that: The secondary purification mechanism comprises a plurality of filter screens, which are any one or more of activated carbon filter screens and bamboo charcoal filter screens.

9. An operation method of a municipal sewage lake outlet purification system, suitable for the municipal sewage lake outlet purification system according to any one of claims 1-8, characterized in that: S1, pouring the sewage to be purified into the purification tank from the water inlet, crushing the impurities in the sewage through the crushing part, and separating the solid and liquid through the screen; S2, the separated liquid flows from the first partition plate into the mixing mechanism, and the sewage and neutralizing agent are mixed and stirred through the mixing mechanism; S3, the mixed liquid is pumped into the purification pipe by the water pump, and the purification pipe is driven to rotate circumferentially by the power end to prolong the reaction time of the sewage in the purification pipe; after the first purification, the sewage is introduced into the secondary purification mechanism, and after the secondary purification, it is discharged to the outside.

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