Wastewater treatment system based on municipal engineering

Abstract

The invention discloses a wastewater treatment system based on municipal engineering, and relates to the technical field of wastewater treatment. The suction part close to the bottom of the tank body reaction tank is arranged below the flow mixing box, the suction runner is used for lifting a wastewater mixture at the bottom of the tank body reaction tank into the flow mixing box, the backflow part is used for conveying the aerated wastewater mixture into the tank body reaction tank, and the backflow runner is slidably arranged in the corresponding suction runner in a sleeving manner. The jet flow assembly is communicated with the backflow flow channels on the two sides of the jet flow assembly, and the jet flow assembly is used for jetting the wastewater mixture in the backflow flow channels into the tank body reaction tank in a jet flow mode. According to the invention, by controlling the lifting motion of the support ring and the conducting pipe among different jet flow point positions, sludge mixed wastewater at the bottom of the pool can be pumped out and conveyed and dispersed into the wastewater at the different jet flow point positions, so that oxygen-mixed activated sludge can be fully diffused in the wastewater to improve the pollutant degradation effect.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to a wastewater treatment system based on municipal engineering. Background Technology

[0002] Jet aeration tank technology is widely used in the biological treatment of municipal wastewater. The technology uses a water pump to draw wastewater containing activated sludge from the aeration tank and returns it to the aeration tank in the form of a high-speed jet through nozzles. During this process, air is introduced into the activated sludge and wastewater to maintain the activity of microorganisms in the activated sludge. The microorganisms decompose the organic matter in the wastewater, thereby achieving the purpose of wastewater treatment.

[0003] In existing technologies, the suction components in jet aeration tanks are usually located at the bottom of the tank. They are used to suction the sludge-mixed wastewater that has settled at the bottom of the tank. The jet components used for the return of the sludge-mixed wastewater after suction are also usually located near the bottom of the tank and are fixed in position. This results in both the suction point and the jet point being close to the bottom of the jet aeration tank, which causes the activated sludge in the wastewater to mainly accumulate at the bottom of the tank. This prevents the activated sludge from being fully dispersed throughout the wastewater and reduces the treatment efficiency of municipal wastewater. Summary of the Invention

[0004] The purpose of this invention is to provide a wastewater treatment system based on municipal engineering, which solves the problems in the background art by specifically designing the suction and return mechanism, the lifting and guiding component, and the jet component.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: The present invention is a wastewater treatment system based on municipal engineering, including a tank reaction tank, wherein a suction reflux mechanism and a lifting jet mechanism are respectively installed inside the tank reaction tank; wherein, the suction reflux mechanism includes a mixing box disposed above the tank reaction tank, and a suction part disposed below the mixing box and close to the bottom of the tank reaction tank; a suction channel disposed between the suction part and the mixing box, the suction channel being used to lift the wastewater mixture at the bottom of the tank reaction tank into the mixing box; and a lifting jet mechanism disposed on both sides of the tank reaction tank. The reflux section is connected to the mixing tank and is used to transport the aerated wastewater mixture to the tank reaction pool. The lifting jet mechanism includes a lifting guide assembly disposed inside the tank reaction pool. The lifting guide assembly includes a reflux channel corresponding to the suction channel, and the reflux channel is slidably sleeved inside the corresponding suction channel. The jet assembly is disposed inside the lifting guide assembly and is connected to the reflux channels on both sides. The jet assembly is used to spray the wastewater mixture in the reflux channel into the tank reaction pool in the form of a jet.

[0006] In this embodiment of the invention, a support frame for supporting the mixing chamber is fixed on the top of the tank reaction pool, a support ring one and a support ring two are respectively installed on the inner wall of the tank reaction pool, and a plurality of limiting guide seats are fixed on the inner wall of the tank reaction pool.

[0007] In this embodiment of the invention, the suction reflux mechanism further includes an annular support seat installed on the top of the support ring. An annular suction pipe is installed on the top of the annular support seat via a snap fastener. A plurality of radial suction pipes are connected to the inner wall of the annular suction pipe. The suction part is composed of the annular suction pipe and the radial suction pipes. A suction pump is installed on the outside of the tank reaction pool via a fixed seat. The inlet of the suction pump is connected to a first lift pipe that communicates with the annular suction pipe. The outlet of the suction pump is connected to a second lift pipe that communicates with the top of the mixing tank. The suction flow channel is composed of the first lift pipe, the suction pump, and the second lift pipe.

[0008] In this embodiment of the invention, a horizontal return pipe is connected to the side of the mixing tank near the bottom, and a vertical return pipe is connected to the end of the horizontal return pipe. The return section consists of the horizontal return pipe and the vertical return pipe. An air supply device is installed on the outside of the tank reaction pool via a fixed seat. The air outlet of the air supply device is connected to an air supply pipe. One end of the air supply pipe passes through the top of the mixing tank and is close to its inner bottom. Several aeration holes located inside the mixing tank are opened on the side of the air supply pipe. Solenoid valves are installed on the second lift pipe, the horizontal return pipe, and the air supply pipe.

[0009] In this embodiment of the invention, the lifting and guiding assembly further includes a mounting bracket fixedly installed on the outer wall of the tank reaction pool. A lifting gear is fixed to the inner side of the mounting bracket via a rotating shaft, and the output end of a lifting control motor installed on the outer side of the mounting bracket is connected to the rotating shaft. A support ring coaxial with the tank reaction pool is provided on the inner side of the tank reaction pool. A limiting sleeve that slides with a limiting guide seat is fixed to the circumferential side of the support ring. A lifting frame sleeved on the tank reaction pool is fixed to the top of the support ring, and a lifting gear seat that meshes with the lifting gear is fixedly installed on the outer wall of the lifting frame.

[0010] In this embodiment of the invention, two hollow guide members are symmetrically fixed on the circumferential side of the support ring, and a guide pipe is provided at the top of the hollow guide member. The top of the guide pipe is slidably fitted inside the corresponding vertical return pipe. Several eccentric guide ports are opened on the circumferential side of the guide pipe, and the spacing between the eccentric guide ports is the same.

[0011] In this embodiment of the invention, the jet assembly includes a hollow guide ring that is gap-fitted onto the inner wall of a support ring. Two bearing tubes are connected to the circumferential side of the hollow guide ring. The bearing tubes are fixedly installed inside the corresponding hollow guide component. A plurality of eccentric jet tubes are arranged in a circumferential array on the inner wall of the hollow guide ring. The eccentric jet tubes are connected to the hollow guide ring.

[0012] In this embodiment of the invention, the jet assembly includes a hollow guide ring with a clearance fit on the inner wall of a support ring. Two bearing tubes are connected to the circumferential side of the hollow guide ring. The bearing tubes are rotatably disposed inside the corresponding hollow guide components. A plurality of eccentric jet tubes are arranged in a circumferential array on the inner wall of the hollow guide ring. The eccentric jet tubes are connected to the hollow guide ring. A support shaft coaxial with the bearing tubes is fixed on the inner wall of the support ring. A connecting plate is fixed at the end of the support shaft. An eccentric column is fixed at an eccentric position on the connecting plate. A linkage plate is rotatably disposed at the end of the eccentric column. An axial drive rod is slidably sleeved on the linkage plate. A support seat is fixedly installed on the inner side wall of the lifting frame. An electric telescopic rod installed on the top of the support seat is connected to the axial drive rod.

[0013] The present invention has the following beneficial effects: 1. Through the structural design of the lifting and guiding components and the jet components, the present invention can extract and transport the sludge mixed with wastewater at the bottom of the pool and disperse it into the wastewater at different jet points by controlling the lifting and lowering movement of the support ring and the guiding pipe in the biological treatment of municipal wastewater in the form of jets. This enables the full diffusion of oxygen-containing activated sludge in the wastewater to improve the degradation effect of pollutants.

[0014] 2. In this invention, when a certain amount of sludge-mixed wastewater is pumped into the mixing tank and aerated, the sludge-mixed wastewater flows back into the tank reaction pool in the form of a jet. During this process, the axial drive rod is slowly moved up and down by an electric telescopic rod. Under the action of the axial drive rod, the linkage plate moves up and down synchronously. In this way, the linkage plate, which moves up and down, drives the connecting plate to rotate a certain angle. Since the connecting plate, support shaft, and hollow guide ring are fixed together, the rotation of the connecting plate drives the hollow guide ring to rotate synchronously. While the sludge-mixed wastewater is sprayed in the form of a jet to generate vortices, the slow rotation of the hollow guide ring generates vortices at different interfaces in the wastewater. This greatly improves the dispersion and mixing efficiency of the oxygen-containing activated sludge in the wastewater.

[0015] 3. In this invention, after controlling the opening of the solenoid valve on the second riser pipe and pumping a certain amount of sludge-mixed wastewater into the mixed flow tank via the suction pump, riser pipe one, and riser pipe two, the invention simultaneously controls the closing of the suction pump and the solenoid valve on the second riser pipe, and simultaneously controls the opening of the solenoid valves on the air supply equipment, the air supply pipeline, and the horizontal return pipe. The air supply equipment and pipeline aerate the sludge-mixed wastewater in the mixed flow tank. This aeration disperses any potentially agglomerated activated sludge in the mixed wastewater, allowing for better contact between the activated sludge and the wastewater for biodegradation. Pre-aeration disperses the activated sludge before it is returned to the tank reaction pool, ensuring that the oxygen-mixed activated sludge is fully dispersed throughout the wastewater for pollutant degradation, thus significantly improving the biological treatment effect on municipal wastewater. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the wastewater treatment system in Embodiment 1 of the present invention.

[0018] Figure 2 This is a schematic diagram of the tank reaction vessel in this invention.

[0019] Figure 3 This is a schematic diagram of the suction and reflux mechanism in this invention.

[0020] Figure 4 for Figure 3 A partial structural diagram.

[0021] Figure 5 This is a schematic diagram of the lifting jet mechanism in Embodiment 1 of the present invention.

[0022] Figure 6 This is a schematic diagram of the lifting and conducting component in this invention.

[0023] Figure 7 This is a schematic diagram of the jet assembly in Embodiment 1 of the present invention.

[0024] Figure 8 This is a schematic diagram of the wastewater treatment system in Embodiment 2 of the present invention.

[0025] Figure 9 This is a schematic diagram of the lifting jet mechanism in Embodiment 2 of the present invention.

[0026] Figure 10 This is a schematic diagram of the jet assembly in Embodiment 2 of the present invention.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1-Tank reaction tank, 2-Suction and reflux mechanism, 3-Lifting and jetting mechanism, 4-Mixing box, 5-Lifting and guiding assembly, 6-Jet assembly, 7-Support frame, 8-Support ring one, 9-Support ring two, 10-Limiting guide seat, 11-Annular bearing seat, 12-Annular suction pipe, 13-Radial suction pipe, 14-Suction pump, 15-Lifting pipe one, 16-Lifting pipe two, 17-Horizontal reflux pipe, 18-Vertical reflux pipe, 19-Gas supply equipment, 20-Gas supply pipeline 21-Solenoid valve, 22-Mounting bracket, 23-Lifting gear, 24-Lifting control motor, 25-Support ring, 26-Limit sleeve, 27-Lifting frame, 28-Lifting gear seat, 29-Hollow guide component, 30-Conducting pipe, 31-Eccentric conducting port, 32-Hollow guide ring, 33-Bearing pipe, 34-Eccentric jet pipe, 35-Support shaft, 36-Connecting disc, 37-Linkage plate, 38-Axial drive rod, 39-Support seat, 40-Electric telescopic rod. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] For a specific implementation example, please refer to Implementation Example 1. Figure 1-10 This invention relates to a wastewater treatment system based on municipal engineering, comprising a tank reaction tank 1, with a suction and return mechanism 2 and a lifting jet mechanism 3 installed inside the tank reaction tank 1. The suction and return mechanism 2 includes a mixing box 4, a suction channel, and a return section. The mixing box 4 is positioned above the tank reaction tank 1, and a suction section is positioned below the mixing box 4, close to the bottom of the tank reaction tank 1. The suction channel is located between the suction section and the mixing box 4, and is used to lift the wastewater mixture from the bottom of the tank reaction tank 1 into the mixing box 4. The return section is located on both sides of the tank reaction tank 1, and is connected to the mixing box 4. The return section is used to transport the aerated wastewater mixture into the tank reaction tank 1.

[0031] The lifting jet mechanism 3 includes a lifting guide component 5 and a jet component 6. The lifting guide component 5 is located inside the tank reaction pool 1. The lifting guide component 5 includes a return flow channel that corresponds one-to-one with the suction flow channel. The return flow channel is slidably sleeved inside the corresponding suction flow channel. The jet component 6 is located inside the lifting guide component 5. The jet component 6 is interconnected with the return flow channels on both sides. The jet component 6 is used to spray the wastewater mixture in the return flow channel into the tank reaction pool 1 in the form of a jet.

[0032] In this embodiment of the invention, such as Figure 2 and Figure 3 As shown, a support frame 7 (which is detachably installed) is fixed on the top of the tank reaction pool 1 to support the mixing box 4. Support ring 1 8 and support ring 2 9 are respectively installed on the inner wall of the tank reaction pool 1. Several limiting guide seats 10 are fixed on the inner wall of the tank reaction pool 1.

[0033] Furthermore, the suction and reflux mechanism 2 also includes an annular support seat 11 (fixed installation) installed on the top of the support ring 8. An annular suction pipe 12 is installed on the top of the annular support seat 11 by means of a snap fastener. Several radial suction pipes 13 are connected to the inner wall of the annular suction pipe 12. The suction part is composed of the annular suction pipe 12 and the radial suction pipes 13. Through the several radial suction pipes 13 arranged in a circumferential array, the sludge mixed wastewater at different positions at the bottom of the tank reaction pool 1 can be pumped into the annular suction pipe 12.

[0034] A suction pump 14 is installed on the outside of the tank reaction pool 1 via a fixed base. The inlet of the suction pump 14 is connected to a first lift pipe 15 that communicates with the annular suction pipe 12, and the outlet of the suction pump 14 is connected to a second lift pipe 16 that communicates with the top of the mixing tank 4. The suction channel consists of the first lift pipe 15, the suction pump 14, and the second lift pipe 16. When the suction pump 14 is started to work, the sludge-mixed wastewater in the annular suction pipe 12 can be pumped into the inner cavity of the mixing tank 4 through the suction pump 14, the first lift pipe 15, and the second lift pipe 16 until a certain amount of sludge-mixed wastewater is pumped into the mixing tank 4. At this time, the suction pump 14 is turned off.

[0035] In this embodiment of the invention, such as Figure 3 and Figure 4As shown, a horizontal return pipe 17 is connected to the bottom of the mixing tank 4 on its surrounding side. A vertical return pipe 18 is connected to the end of the horizontal return pipe 17. The return section consists of the horizontal return pipe 17 and the vertical return pipe 18. An air supply device 19 (existing technology) is installed on the outside of the tank reaction pool 1 via a fixed seat. The air outlet of the air supply device 19 is connected to an air supply pipe 20. One end of the air supply pipe 20 passes through the top of the mixing tank 4 and is close to its inner bottom. Several aeration holes are opened on the surrounding side of the air supply pipe 20 located inside the mixing tank 4. Solenoid valves 21 are installed on the second lift pipe 16, the horizontal return pipe 17, and the air supply pipe 20. The solenoid valve 21 on the second lift pipe 16 is opened by controlling the pump 14, the first lift pipe 15, and the second lift pipe 16 to mix a certain amount of sludge. After the wastewater is pumped into the mixed tank 4, the solenoid valve 21 on the suction pump 14 and the lift pipe 16 is closed, while the solenoid valve 21 on the air supply device 19, the air supply pipeline 20, and the horizontal return pipe 17 is opened. The sludge-mixed wastewater in the mixed tank 4 is aerated through the air supply device 19 and the air supply pipeline 20. The aeration treatment disperses the activated sludge that may agglomerate in the sludge-mixed wastewater in the mixed tank 4, so that the activated sludge can better contact the wastewater for biodegradation. The pre-aeration achieves the dispersion of activated sludge and then transports it back to the tank reaction pool 1. This can achieve the full dispersion of oxygen-mixed activated sludge in the entire wastewater for pollutant degradation, thereby greatly improving the biological treatment effect of municipal wastewater.

[0036] In this embodiment of the invention, such as Figure 5 and Figure 6 As shown, the lifting and guiding assembly 5 also includes a mounting bracket 22 fixedly installed on the outer wall of the tank reaction pool 1. A lifting gear 23 is fixed to the inner side of the mounting bracket 22 via a rotating shaft (i.e., a rotating shaft is rotatably installed inside the mounting bracket 22, and the lifting gear 23 is fixed on this shaft). The output end of the lifting control motor 24 installed on the outer side of the mounting bracket 22 is connected to the rotating shaft. A support ring 25 coaxial with the tank reaction pool 1 is provided inside the tank reaction pool 1. A limiting sleeve 26 that slides with the limiting guide seat 10 is fixed to the circumferential side of the support ring 25. This structure ensures... The support ring 25 moves smoothly up and down inside the tank reaction pool 1. The top of the support ring 25 is fixed with a lifting frame 27 sleeved on the tank reaction pool 1. A lifting tooth seat 28 that meshes with the lifting gear 23 is fixedly installed on the outer wall of the lifting frame 27. When the lifting control motor 24 is started, the lifting gear 23 is driven to rotate. Under the meshing action of the lifting gear 23 and the lifting tooth seat 28, the lifting frame 27 is driven to move up and down with the support ring 25. In this embodiment, both the support ring 25 and the lifting frame 27 are made of lightweight materials.

[0037] In this embodiment of the invention, such as Figure 6 and Figure 7As shown, two hollow guide members 29 are symmetrically fixed on the side of the support ring 25. A guide tube 30 (made of lightweight material) is connected to the top of the hollow guide member 29. The top of the guide tube 30 is slidably fitted inside the corresponding vertical return tube 18. Several eccentric guide ports 31 are opened on the side of the guide tube 30 and the spacing between the eccentric guide ports 31 is the same.

[0038] Furthermore, the jet assembly 6 includes a hollow guide ring 32 (made of lightweight material) that is gap-fitted onto the inner wall of the support ring 25. Two bearing tubes 33 are connected to the circumferential side of the hollow guide ring 32. The bearing tubes 33 are fixedly installed inside the corresponding hollow guide component 29 (the two are connected). A plurality of eccentric jet tubes 34 are arranged in a circumferential array on the inner wall of the hollow guide ring 32. The eccentric jet tubes 34 are connected to the hollow guide ring 32. In this embodiment, the orientation of each eccentric guide port 31 is the same as the orientation of the eccentric jet tube 34.

[0039] Initially, each hollow guide component 29 rests against the second support ring 9. At this time, the hollow guide ring 32 and its eccentric jet pipes 34 are at the lowest first jet point. The horizontal return pipe 17 is directly connected to the vertical return pipe 18. The control system controls the opening of the solenoid valves 21 on the suction pump 14 and the second lift pipe 16, and pumps a certain amount of sludge-mixed wastewater into the mixing tank 4 through the suction pump 14, the first lift pipe 15, and the second lift pipe 16. Then, while controlling the closing of the solenoid valves 21 on the suction pump 14 and the second lift pipe 16, the control system opens the solenoid valves 21 on the air supply equipment 19, the air supply pipeline 20, and the horizontal return pipe 17, and pumps a certain amount of sludge-mixed wastewater into the mixing tank 4 through the air supply equipment 19 and the air supply pipeline 20. The sludge-mixed wastewater in the mixed-flow tank 4 is aerated. Under the air pressure generated by the aeration inside the mixed-flow tank 4, the sludge-mixed wastewater in the mixed-flow tank 4 is pressurized while being aerated. The pressurized sludge-mixed wastewater enters the hollow guide ring 32 through the horizontal return pipe 17, vertical return pipe 18, guide pipe 30, hollow guide component 29 and bearing pipe 33, and is then sprayed into the wastewater in the tank reaction pool 1 by each eccentric jet pipe 34. At the same time, the wastewater can also be jetted through each eccentric guide port 31 exposed on the outside of the guide pipe 30 to realize the transport of activated sludge (generating eddies). The eddies generated by the jet water flow realize the full diffusion of oxygen-containing activated sludge in the wastewater to improve the pollutant degradation effect.

[0040] After the gas supply equipment 19 reaches the operating time set by the control system, the sludge-mixed wastewater in the mixing box 4 is completely discharged back into the tank reaction pool 1. At this time, the control closes the solenoid valves 21 on the gas supply equipment 19, the gas supply pipeline 20, and the horizontal return pipe 17, and starts the lifting control motor 24 to drive the lifting gear 23 to rotate. Under the meshing action of the lifting gear 23 and the lifting gear seat 28, the lifting frame 27 is driven to rise with the support ring 25 and the guide pipe 30 to the set position. At the fixed position (i.e., the second jet point), the horizontal return pipe 17 is still directly connected to the vertical return pipe 18. Then, following the same operating method, a certain amount of sludge-mixed wastewater is pumped into the mixing tank 4 again. After aeration, it is returned to the wastewater in the tank reaction pool 1 in the form of a jet. In this way, the sludge-mixed wastewater at the bottom can be pumped out and transported to the wastewater at the second jet point, thereby realizing the full diffusion of oxygen-containing activated sludge in different water layers of the wastewater to improve the biodegradation effect.

[0041] When the support ring 25 and the guide pipe 30 are raised to the set position (i.e., the third jet point) using the same control method described above, a certain amount of sludge-mixed wastewater can be pumped back into the mixing tank 4 through the same operating method described above. After aeration, it will flow back into the wastewater in the tank reaction pool 1 in the form of a jet. In this way, the sludge-mixed wastewater at the bottom can be pumped out and transported to the wastewater at the third jet point. When the support ring 25 and the guide pipe 30 are raised to the set position (i.e., the fourth jet point), the uppermost eccentric guide port 31 of the guide pipe 30 is connected to the horizontal return pipe 17, while all other eccentric guide ports 31 are inside the guide pipe 30 and blocked by the pipe wall of the guide pipe 30. Subsequently Using the same operating method described above, a certain amount of sludge-mixed wastewater can be pumped back into the mixing tank 4. After aeration, it will flow back into the wastewater in the tank reaction pool 1 in the form of a jet. In this way, the sludge-mixed wastewater at the bottom can be pumped out and transported to the wastewater at the fourth jet point. Following the same control method described above, the support ring 25 and the guide pipe 30 will rise to the highest position. At this time, the lowest eccentric guide port 31 will be connected to the horizontal return pipe 17. After the jet is completed again, the lifting control motor 24 will drive the lifting gear 23 to rotate in the opposite direction, causing the support ring 25 and the guide pipe 30 to fall back to the initial position. Subsequently, the continuous biological treatment of wastewater can be realized according to the program set by the control system.

[0042] Specific embodiment two, based on specific embodiment one, such as Figure 8 , Figure 9 and Figure 10As shown, the jet assembly 6 includes a hollow guide ring 32 with a clearance fit on the inner wall of the support ring 25. Two bearing tubes 33 are connected to the circumferential side of the hollow guide ring 32. The bearing tubes 33 are rotatably disposed inside the corresponding hollow guide component 29. Several eccentric jet tubes 34 are arranged in a circumferential array on the inner wall of the hollow guide ring 32. The eccentric jet tubes 34 are connected to the hollow guide ring 32. A support shaft 35 coaxial with the bearing tubes 33 is fixed on the inner wall of the support ring 25. A connecting plate 36 is fixed at the end of the support shaft 35. An eccentric column is fixed at the eccentric position of the connecting plate 36. A linkage plate 37 is rotatably disposed at the end of the eccentric column. An axial drive rod 38 is slidably sleeved on the linkage plate 37. A support seat 39 is fixedly installed on the inner side wall of the lifting frame 27. An electric telescopic rod 40 installed on the top of the support seat 39 is connected to the axial drive rod 38.

[0043] The operation mode of wastewater biological treatment in this embodiment is basically the same as that in Embodiment 1. The only difference is that when a certain amount of sludge-mixed wastewater is pumped into the mixing tank 4, and the sludge-mixed wastewater after aeration flows back to the tank reaction pool 1 in the form of a jet, the axial drive rod 38 is slowly moved up and down by the electric telescopic rod 40. Under the action of the axial drive rod 38, the linkage plate 37 moves up and down synchronously. In this way, the linkage plate 37, which moves up and down, drives the connecting plate 36 to rotate a certain angle. Since the connecting plate 36, the support shaft 35 and the hollow guide ring 32 are fixed together, the rotation of the connecting plate 36 drives the hollow guide ring 32 to rotate synchronously. While the sludge-mixed wastewater is sprayed in the form of a jet to generate vortices, the slow rotation of the hollow guide ring 32 generates vortices at different interfaces in the wastewater. This can greatly improve the dispersion and mixing efficiency of the oxygen-containing activated sludge in the wastewater.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A wastewater treatment system based on municipal engineering, comprising a tank reaction vessel (1); characterized in that, The tank reaction pool (1) is equipped with a suction reflux mechanism (2) and a lifting jet mechanism (3) on its inner side. The suction and reflux mechanism (2) includes: A mixing box (4) is set above the tank reaction pool (1), and a suction part is set below the mixing box (4) close to the bottom of the tank reaction pool (1); The suction channel is provided between the suction section and the mixing box (4), and the suction channel is used to lift the wastewater mixture at the bottom of the tank reaction pool (1) into the mixing box (4); The reflux section is set on both sides of the tank reaction tank (1). The reflux section is connected to the mixing box (4). The reflux section is used to transport the aerated wastewater mixture into the tank reaction tank (1). The lifting jet mechanism (3) includes: The lifting and guiding assembly (5) is installed inside the tank reaction pool (1). The lifting and guiding assembly (5) includes a return flow channel that corresponds one-to-one with the suction flow channel. The return flow channel is slidably sleeved inside the corresponding suction flow channel. The jet assembly (6) is located inside the lifting and guiding assembly (5). The jet assembly (6) is connected to the return channels on both sides. The jet assembly (6) is used to spray the wastewater mixture in the return channel into the tank reaction pool (1) in the form of a jet.

2. The wastewater treatment system based on municipal engineering according to claim 1, characterized in that, The top of the tank reaction pool (1) is fixed with a support frame (7) for supporting the mixing box (4). Support ring one (8) and support ring two (9) are respectively installed on the inner wall of the tank reaction pool (1). Several limiting guide seats (10) are fixed on the inner wall of the tank reaction pool (1).

3. The wastewater treatment system based on municipal engineering according to claim 2, characterized in that, The suction return mechanism (2) also includes an annular support seat (11) installed on the top of the support ring (8). An annular suction pipe (12) is installed on the top of the annular support seat (11) by a snap fastener. Several radial suction pipes (13) are connected on the inner wall of the annular suction pipe (12). The suction part is composed of the annular suction pipe (12) and the radial suction pipes (13). A suction pump (14) is installed on the outside of the tank reaction pool (1) via a fixed seat. The inlet of the suction pump (14) is connected to a first lifting pipe (15) that communicates with the annular suction pipe (12). The outlet of the suction pump (14) is connected to a second lifting pipe (16) that communicates with the top of the mixing box (4). The suction channel consists of the first lifting pipe (15), the suction pump (14), and the second lifting pipe (16).

4. A wastewater treatment system based on municipal engineering as described in claim 3, characterized in that, A horizontal return pipe (17) is connected to the side of the mixing tank (4) near the bottom. A vertical return pipe (18) is connected to the end of the horizontal return pipe (17). The return section is composed of the horizontal return pipe (17) and the vertical return pipe (18). An air supply device (19) is installed on the outside of the tank reaction pool (1) through a fixed seat. An air supply pipe (20) is connected to the outlet of the air supply device (19). One end of the air supply pipe (20) passes through the top of the mixing tank (4) and is close to its inner bottom. Several aeration holes located inside the mixing tank (4) are opened on the side of the air supply pipe (20). Solenoid valves (21) are installed on the second lift pipe (16), the horizontal return pipe (17) and the air supply pipe (20).

5. A wastewater treatment system based on municipal engineering as described in claim 4, characterized in that, The lifting and guiding assembly (5) also includes a mounting bracket (22) fixedly installed on the outer wall of the tank reaction pool (1). A lifting gear (23) is fixed on the inner side of the mounting bracket (22) via a rotating shaft. The output end of the lifting control motor (24) installed on the outer side of the mounting bracket (22) is connected to the rotating shaft. The inner side of the tank reaction pool (1) is provided with a support ring (25) coaxial with it. The peripheral side of the support ring (25) is fixed with a limiting sleeve (26) that slides with the limiting guide seat (10). The top of the support ring (25) is fixed with a lifting frame (27) sleeved on the tank reaction pool (1). The outer side wall of the lifting frame (27) is fixed with a lifting gear seat (28) that meshes with the lifting gear (23).

6. A wastewater treatment system based on municipal engineering according to claim 5, characterized in that, Two hollow guide members (29) are symmetrically fixed on the circumferential side of the support ring (25). A guide tube (30) is connected to the top of the hollow guide member (29). The top of the guide tube (30) is slidably fitted inside the corresponding vertical return tube (18). Several eccentric guide ports (31) are opened on the circumferential side of the guide tube (30) and the spacing between the eccentric guide ports (31) is the same.

7. A wastewater treatment system based on municipal engineering according to claim 6, characterized in that, The jet assembly (6) includes a hollow guide ring (32) that is gap-fitted on the inner wall of the support ring (25). Two bearing tubes (33) are connected to the periphery of the hollow guide ring (32). The bearing tubes (33) are fixedly installed inside the corresponding hollow guide component (29). A plurality of eccentric jet tubes (34) are arranged in a circumferential array on the inner wall of the hollow guide ring (32). The eccentric jet tubes (34) are connected to the hollow guide ring (32).

8. A wastewater treatment system based on municipal engineering according to claim 6, characterized in that, The jet assembly (6) includes a hollow guide ring (32) that is gap-fitted on the inner wall of the support ring (25). Two bearing tubes (33) are connected to the circumferential side of the hollow guide ring (32). The bearing tubes (33) are rotatably disposed inside the corresponding hollow guide component (29). A plurality of eccentric jet tubes (34) are arranged in a circumferential array on the inner wall of the hollow guide ring (32). The eccentric jet tubes (34) are connected to the hollow guide ring (32). A support shaft (35) coaxial with the bearing tube (33) is fixed on the inner wall of the support ring (25). A connecting plate (36) is fixed at the end of the support shaft (35). An eccentric column is fixed at the eccentric position of the connecting plate (36). A linkage plate (37) is rotatably provided at the end of the eccentric column. An axial drive rod (38) is slidably sleeved on the linkage plate (37). A support seat (39) is fixedly installed on the inner side wall of the lifting frame (27). An electric telescopic rod (40) installed on the top of the support seat (39) is connected to the axial drive rod (38).

Images