A multi-stage deflection sedimentation purification device for domestic sewage

Abstract

The application discloses a kind of domestic sewage multistage baffle settling purification device, including the bottom end of multistage settling tank is equipped with several mud storage hopper, shunt chamber is arranged below mud storage hopper, separation component is arranged in shunt chamber;Shunt chamber outer wall is fixedly connected with top plate, and top plate bottom is fixedly connected with guide plate;Mud water from mud storage hopper falls after being screened by separation component, mud is transported out of shunt chamber by separation component and falls on guide plate, and water enters shunt chamber.Polluted water enters from the water inlet end of multistage settling tank, slowly flows along multistage baffle settling flow channel, and the sludge impurities with relatively large density in polluted water gradually settle during flowing process.Mud water mixture enriched in mud storage hopper falls into shunt chamber by gravity, and separation component screens mud water mixture, separated solid sludge is transported to guide plate and then collected and discharged, and separated polluted water remains in shunt chamber, and these sludge debris inside will enter screening chamber with polluted water.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to a multi-stage baffle sedimentation purification device for domestic sewage. Background Technology

[0002] In the process of domestic sewage purification and treatment, sedimentation is an important step in removing suspended sludge and other solid impurities from sewage. The sedimentation effect directly affects the effluent quality and the operating load of subsequent treatment units.

[0003] In existing horizontal flow sedimentation tanks, wastewater enters from the inlet and flows unidirectionally horizontally. The sedimentation path is short, and the wastewater's residence time within the tank is limited. Dense sludge particles often do not have sufficient time to settle before being carried out by the water flow, resulting in limited sedimentation and separation efficiency for large sludge particles. This leads to a higher amount of residual sludge in the effluent, increasing the sludge load on subsequent treatment units. Furthermore, the sludge deposited at the bottom of existing sedimentation tanks is mostly removed through periodic manual cleaning or simple sludge discharge methods. This lack of continuity and smoothness in sludge discharge results in long-term sludge accumulation, which not only reduces the effective sedimentation volume but also easily clogs the discharge channels, requiring frequent shutdowns for maintenance. This makes it difficult to meet the requirements for continuous and stable operation of domestic wastewater treatment. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage baffle sedimentation purification device for domestic sewage to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-stage baffle sedimentation purification device for domestic sewage includes a multi-stage sedimentation tank, a diversion chamber, and a separation component. The multi-stage sedimentation tank contains several baffles and baffles, forming a flow channel between the baffles and the baffles. Multiple flow channels are sequentially connected along the direction of sludge flow to form a multi-stage baffle sedimentation channel. Several sludge hoppers are located at the bottom of the multi-stage sedimentation tank. The diversion chamber is located below the sludge hoppers, and the separation component is located within the diversion chamber. A top plate is fixedly connected to the outer wall of the diversion chamber, and a sludge guide plate is fixedly connected to the bottom of the top plate. The mud and water falling from the mud hopper are screened by the separation component. The mud is transported out of the diversion chamber by the separation component and falls onto the mud guide plate, while the water enters the diversion chamber.

[0006] Preferably, a sludge hopper is fixedly connected to the bottom of the multi-stage sedimentation tank, a sludge discharge pipe is fixedly connected to the bottom of the sludge hopper, a drive motor is fixedly connected to the bottom of the sludge discharge pipe, a sludge discharge pipe is connected to the outer wall of the sludge discharge pipe, a screw rod is mounted on the output end of the drive motor, the screw rod is located inside the sludge discharge pipe, and the sludge discharge pipe is connected to the top of the diversion chamber.

[0007] Preferably, the side wall of the diversion chamber is provided with several discharge windows. The separation component includes at least two shaft blocks, which are fixed on both sides of the discharge windows. A geared disc is rotatably connected to the two shaft blocks. A chain is installed on the geared disc, and a screening screen is installed on the chain. The mud and water discharged from the mud discharge pipe fall onto the surface of the screening screen, and the water passes through the screening screen and enters the diversion chamber. A drive shaft is mounted on the geared disc, and a driven wheel is fixedly connected to one end of the drive shaft. A reduction motor is fixedly connected to the surface of the top plate, and the output end of the reduction motor is connected to the driven wheel through a belt.

[0008] Preferably, a screening chamber is fixedly connected to one side of the diversion chamber, and the wastewater in the diversion chamber enters the screening chamber, which is equipped with a two-stage screening assembly.

[0009] Preferably, the screening chamber has a side window on the side facing the mud guide plate, and the secondary screening component includes a coarse screen and a fine screen. The coarse screen and the fine screen are fixedly connected in sequence inside the side window, and the mud on the surface of the coarse screen and the fine screen is discharged into the mud guide plate through the side window.

[0010] Preferably, both the coarse and fine mesh screens are inclined, and the mesh structures of the screening screen, coarse screen, and fine mesh screen are arranged from large to small in sequence.

[0011] Preferably, push blocks are slidably disposed on the surfaces of both the coarse screen and the fine screen. A slide rod is fixedly connected to one end of each push block. The slide rod slides through the side wall of the screening chamber. A push handle is fixedly connected to the tail end of the slide rod. A spring is sleeved on the slide rod.

[0012] Preferably, the mud guide plate extends downward at an angle away from the diversion chamber.

[0013] Preferably, a baffle is fixedly connected to the surface of the mud guide plate. The baffle has a U-shaped structure, and the top of the baffle is close to the surface of the screening screen.

[0014] Preferably, the bottom of the diversion chamber is provided with an inclined plate, the inclined plate is inclined toward the screening chamber, and a viewing window is provided on one side of the screening chamber.

[0015] The technical solution of this invention has the following beneficial effects: 1. Wastewater enters from the inlet of the multi-stage sedimentation tank and flows slowly along the multi-stage baffle sedimentation channel. During the flow, the denser sludge impurities in the wastewater gradually settle and eventually slide down the tank body to the sludge hopper at the bottom to complete the initial sedimentation and enrichment. The baffle sedimentation channel extends the flow path of the wastewater and prolongs the sludge settling time.

[0016] 2. The mud-water mixture accumulated in the sludge hopper falls downward into the diversion chamber by gravity. The separation component screens the mud-water mixture, and the separated solid sludge is transported to the guide plate and then collected and discharged. The separated wastewater remains inside the diversion chamber. The sludge fragments inside the diversion chamber will enter the screening chamber with the wastewater, and further solid-liquid separation will be completed under the action of the secondary screening component. The residual sludge in the wastewater will be intercepted again, improving the thoroughness of solid-liquid separation of wastewater. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a top view of the multi-stage sedimentation tank of the present invention.

[0020] Figure 3 This is a three-dimensional cross-sectional view of the present invention.

[0021] Figure 4 This is a three-dimensional cross-sectional view of the BB of the present invention.

[0022] Figure 5 This is a partial cross-sectional view of the entire invention.

[0023] Figure 6 This is a partial structural diagram of the present invention.

[0024] Figure 7 This is a schematic diagram of the internal structure of the mud guide plate of the present invention.

[0025] Figure 8 This is a schematic diagram of the internal structure of the diversion chamber of the present invention.

[0026] Figure 9 This is a three-dimensional cross-sectional view of the screening chamber of the present invention.

[0027] Figure 10 This is a schematic cross-sectional plan view of the screening chamber of the present invention.

[0028] Attached reference numerals: 10. Multistage sedimentation tank; 101. Baffle plate; 102. Baffle plate; 103. Sludge hopper; 104. Sludge discharge pipe; 105. Screw rod; 106. Drive motor; 107. Sludge discharge pipe; 108. Sealed top cover; 20. Diversion chamber; 201. Discharge window; 202. Screening chamber; 203. Top plate; 204. Sludge guide plate; 205. Side window; 206. Coarse screen; 207. Fine screen; 208. Push block; 209. Slide bar; 210. Push handle; 211. Spring; 212. Inclined plate; 213. Viewing window; 30. Separation assembly; 301. Shaft block; 302. Gear disc; 303. Chain; 304. Screening mesh; 305. Drive shaft; 306. Driven wheel; 307. Gear motor; 40. Baffle. Detailed Implementation

[0029] 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. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0030] Example 1: refer to Figure 1-6 A multi-stage baffle sedimentation purification device for domestic sewage includes a multi-stage sedimentation tank 10, a diversion chamber 20, and a separation component 30. The multi-stage sedimentation tank 10 is provided with a plurality of baffles 101 and a plurality of baffles 102 inside, and a flow guiding channel is formed between the baffles 102 and the baffles 101. There are multiple flow guiding channels, which are connected sequentially along the flow direction of the sludge and water to form a multi-stage baffle sedimentation channel. A sealed top cover 108 is fixedly connected to the top of the multi-stage sedimentation tank 10.

[0031] In this embodiment, wastewater enters from the inlet of the multi-stage sedimentation tank 10 and flows slowly along the multi-stage baffle sedimentation channel. During the flow, the denser sludge impurities in the wastewater gradually settle and eventually slide down the tank body to the sludge hopper 103 at the bottom to complete the initial sedimentation and enrichment. The baffle sedimentation channel extends the flow path of the wastewater and prolongs the sludge settling time. Compared with the horizontal flow sedimentation tank, it can improve the sedimentation and separation efficiency of large sludge particles and reduce the sludge load of subsequent treatment units.

[0032] The multi-stage sedimentation tank 10 is provided with several sludge hoppers 103 at the bottom. The diversion chamber 20 is located below the sludge hoppers 103, and the separation component 30 is located inside the diversion chamber 20. The outer wall of the diversion chamber 20 is fixedly connected to a top plate 203, and the bottom of the top plate 203 is fixedly connected to a mud guide plate 204. The mud and water falling from the sludge hoppers 103 are screened by the separation component 30. The mud is transported out of the diversion chamber 20 by the separation component 30 and falls onto the mud guide plate 204, while the water enters the diversion chamber 20.

[0033] In this embodiment, the mud-water mixture enriched in the mud storage hopper 103 falls downward into the diversion chamber 20 by gravity. The separation component 30 screens the mud-water mixture. The separated solid sludge is transported to the guide plate 204 and then collected and discharged. The separated wastewater remains inside the diversion chamber 20 and continues to flow to the next station.

[0034] Preferred reference Figures 1-4 The bottom of the multi-stage sedimentation tank 10 is fixedly connected to a sludge hopper 103, the bottom of the sludge hopper 103 is fixedly connected to a sludge discharge pipe 104, the bottom of the sludge discharge pipe 104 is fixedly connected to a drive motor 106, the outer wall of the sludge discharge pipe 104 is connected to a sludge discharge pipe 107, the output end of the drive motor 106 is equipped with a screw rod 105, the screw rod 105 is located inside the sludge discharge pipe 104, and the sludge discharge pipe 107 is connected to the top of the diversion chamber 20.

[0035] After the mud and water initially enriched in the mud storage hopper 103 falls into the lower mud pipe 104, the drive motor 106 drives the screw rod 105 to rotate, pushing the mud and water discharged from the mud storage hopper 103 and sending it at a uniform speed from the mud discharge pipe 107 into the lower diversion chamber 20. The screw pushing structure can stably control the mud discharge speed, avoid the mud storage hopper 103 discharging a large amount of mud in a short time, which would cause the separation component 30 to be overloaded, ensure the continuous and stable operation of the mud and water separation process, and also prevent the mud and water from accumulating and clogging in the lower mud pipe 104, ensuring the smooth mud discharge of the entire device.

[0036] refer to Figures 5-8 The diversion chamber 20 has several discharge windows 201 on its side wall. The separation component 30 includes at least two shaft blocks 301. The shaft blocks 301 are fixed on both sides of the discharge windows 201. A geared disc 302 is rotatably connected to the two shaft blocks 301. A chain 303 is installed on the geared disc 302. A screening screen 304 is installed on the chain 303. The mud and water discharged from the mud discharge pipe 107 fall onto the surface of the screening screen 304. The water passes through the screening screen 304 and enters the diversion chamber 20. A drive shaft 305 is mounted on the geared disc 302. A driven wheel 306 is fixedly connected to one end of the drive shaft 305. A reduction motor 307 is fixedly connected to the surface of the top plate 203. The output end of the reduction motor 307 is connected to the driven wheel 306 through a belt.

[0037] Sludge discharged from the sludge discharge pipe 107 falls directly onto the surface of the screening screen 304. By starting the reduction motor 307, the driven wheel 306 rotates via belt drive, which in turn drives the transmission shaft 305 to rotate the geared disc 302. This causes the chain 303 to circulate along the geared disc 302, allowing the screening screen 304, placed on the chain 303, to slowly move towards the discharge window 201 with the sludge trapped on its surface. Finally, the sludge is transported to the outside of the discharge window 201, where it naturally falls onto the guide plate 204, completing the sludge discharge. The screening screen 304 completes mud-water separation and sludge discharge during its circulating movement, eliminating the need for manual cleaning of the trapped sludge. The separation process can operate continuously and automatically.

[0038] refer to Figure 9 and Figure 10 A screening chamber 202 is fixedly connected to one side of the diversion chamber 20. The sewage in the diversion chamber 20 enters the screening chamber 202, and a two-stage screening component is installed inside the screening chamber 202.

[0039] After initial separation by the screening screen 304, the wastewater falling into the diversion chamber 20 may still contain some small sludge fragments. These sludge fragments will enter the screening chamber 202 with the wastewater, where further solid-liquid separation will be completed under the action of the secondary screening components. This will further intercept the sludge remaining in the wastewater, improve the thoroughness of solid-liquid separation, prevent small sludge particles from flowing back to the front-end sedimentation process with the wastewater, ensure the effectiveness of subsequent sedimentation treatment, and reduce the ineffective circulation of sludge in the multi-stage sedimentation tank.

[0040] refer to Figure 9 and Figure 10 The screening chamber 202 has a side window 205 on the side facing the mud guide plate 204. The secondary screening component includes a coarse screen 206 and a fine screen 207. The coarse screen 206 and the fine screen 207 are fixedly connected in sequence inside the side window 205. The mud on the surface of the coarse screen 206 and the fine screen 207 is discharged into the mud guide plate 204 through the side window 205.

[0041] Compared to the screening screen 304 in the primary separation stage, the mesh size of the coarse screen 206 and the fine screen 207 decreases sequentially, which can separate and retain residual sludge particles of different sizes. The retained sludge slides along the screen surface into the side window 205 and is finally discharged into the sludge guide plate 204. After two stages of screening, even smaller sludge particles are effectively retained, preventing small sludge particles from entering the next stage of settling tank, improving the overall solid-liquid separation efficiency, and reducing the difficulty of subsequent deep treatment.

[0042] Preferably, both the coarse screen 206 and the fine screen 207 are inclined. The mesh structure of the screening screen 304, the coarse screen 206, and the fine screen 207 is arranged from large to small in sequence.

[0043] The sludge can slide down the inclined mesh surface automatically by its own gravity. At the same time, the arrangement of the mesh with progressively smaller holes can achieve gradient separation of sludge particles. Large-diameter sludge particles are intercepted first, and then medium and small-diameter sludge particles are filtered out layer by layer. The step-by-step interception can avoid large-diameter sludge particles clogging the finer mesh 207 with smaller holes, extend the cleaning cycle of the filter screen, and ensure the filtration efficiency and service life of the secondary screening component.

[0044] The mud guide plate 204 extends downward at an angle away from the diversion chamber 20.

[0045] The inclined slope of the guide plate 204 can guide the intercepted sludge to slide down automatically to the sludge discharge port by gravity, eliminating the need for an additional conveying device to transport the sludge, thus simplifying the device structure. At the same time, the inclined design can prevent sludge from accumulating and remaining on the guide plate, ensuring that the intercepted sludge can be discharged smoothly from the device and reducing the probability of sludge clogging the guide plate 204.

[0046] refer to Figures 5-8 A baffle 40 is fixedly connected to the surface of the mud guide plate 204. The baffle 40 has a U-shaped structure, and the top of the baffle 40 is close to the surface of the screening screen 304.

[0047] The top of the baffle 40, close to the surface of the screening mesh 304, can scrape off the sludge on the surface of the screening mesh 304. When the screening mesh 304 completes interception and the chain 303 structure is running, the top of the baffle 40, close to the mesh surface, can scrape off the clumps of sludge that are attached to the mesh surface and have not automatically slid off, preventing sludge from adhering to the mesh surface for a long time and clogging the mesh holes, thus ensuring that the filtration capacity of the screening mesh 304 remains stable. The U-shaped opening of the baffle 40 faces downwards, so it does not affect the sludge sliding off the sludge guide plate 204.

[0048] refer to Figure 6 and Figure 10 The bottom of the diversion chamber 20 is provided with an inclined plate 212, which is inclined toward the screening chamber 202. A viewing window 213 is provided on one side of the screening chamber 202.

[0049] The inclined plate 212 guides the wastewater in the diversion chamber 20 to slide along the slope to the side and enter the screening chamber 202 for secondary screening. The viewing window 213 located on the side of the screening chamber 202 allows staff to directly observe the screen blockage and sludge retention inside the screening chamber 202, facilitating timely cleaning operations and rapid troubleshooting of equipment malfunctions, thus reducing the difficulty of daily maintenance.

[0050] Example 2: refer to Figure 9 and Figure 10Push blocks 208 are slidably provided on the surfaces of coarse screen 206 and fine screen 207. A slide rod 209 is fixedly connected to one end of the push block 208. The slide rod 209 slides through the side wall of the screening chamber 202. A push handle 210 is fixedly connected to the tail end of the slide rod 209. A spring 211 is sleeved on the slide rod 209.

[0051] In the initial state, spring 211 pushes slide rod 209 and push block 208 to stop near the inner side of screening chamber 202. When a lot of sludge accumulates on the screens of coarse screen 206 and fine screen 207, affecting the filtration speed, the operator can hold push handle 210 to push slide rod 209, causing push block 208 to slide along the inclined screen surface, pushing the accumulated sludge residue on the screen surface to the side window 205. Then, release push handle 210, and spring 211 can automatically drive push block 208 to reset. There is no need for workers to enter the device for cleaning. The operation is simple and convenient. The sludge removal operation can be completed during the operation of the device without stopping the machine, ensuring the processing efficiency of the device.

[0052] The specific implementation process of this invention is as follows: Step 1, Water Intake and Multi-stage Baffle Settling: Wastewater enters from the inlet and flows slowly along the multi-stage baffle settling channel formed by several baffles 101 and several baffles 102. The denser sludge impurities gradually settle and slide into the sludge hopper 103 to complete the initial enrichment. The baffle channel extends the flow path and the settling residence time.

[0053] Step 2: Slurry is fed into the diversion chamber (see reference) Figures 1 to 4 -- The mud and water in the mud storage hopper 103 fall into the mud lowering pipe 104 by gravity. The drive motor 106 drives the screw rod 105 to rotate, pushing the mud and water to the mud discharge pipe 107 and sending it into the top of the diversion chamber 20, where it falls onto the surface of the screening screen 304. The screw push can stably control the mud discharge speed and avoid overloading of the separation component 30 and siltation in the mud lowering pipe 104.

[0054] Step 3: Primary screening and sludge removal (refer to...) Figures 5 to 8 Water passes through the screening screen 304 and enters the diversion chamber 20, where solid sludge is trapped. The geared motor 307 is started, which drives the driven wheel 306 → transmission shaft 305 → gear plate 302 → chain 303 via belt, causing the screening screen 304 to move cyclically towards the discharge window 201, transporting the trapped sludge to the outside of the discharge window 201 and dropping it onto the guide plate 204, thus achieving continuous automatic sludge discharge.

[0055] Step 4, Secondary screening (refer to) Figure 9 and Figure 10Wastewater mixed with fine sludge fragments enters the screening chamber 202 and is filtered again by two stages of coarse screen 206 and fine screen 207. The mesh size gradually decreases to achieve stratified interception of sludge of different particle sizes. The intercepted sludge slides down the inclined mesh surface and is discharged into the sludge guide plate 204 through the side window 205.

[0056] Step 5, Sludge Discharge and Auxiliary Structures: The inclined slope of the sludge guide plate 204 guides the sludge to slide down and be discharged by gravity; the baffle 40 is U-shaped with its top close to the surface of the screening screen 304, scraping off the clumps of sludge attached to the screen surface; the inclined plate 212 guides the wastewater to one side of the screening chamber 202; the viewing window 213 is used to observe the screen blockage and sludge retention.

[0057] Step 6: When there is a lot of mud on the screen, hold the push handle 210 and push the slide bar 209 to drive the push block 208 to slide along the inclined screen surface, pushing the sludge residue to the side window 205 and into the mud guide plate 204; after releasing, the spring 211 drives the push block 208 to automatically reset, realizing sludge removal during operation.

[0058] The above embodiments are merely exemplary models of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Various modifications or equivalent substitutions can be made to the present invention within its spirit and scope of protection. Such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

[0059] In the description of this invention, it should be noted that the terms "inner," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the appended circle, or the orientation or positional relationship in which the product of this invention is conventionally placed during use. They are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, these terms indicating orientation or positional relationships should not be construed as limitations on the invention.

[0060] In the description of this invention, it should be further noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, these terms can refer to a fixed connection, a detachable connection, or an integral connection between elements; they can also refer to a mechanical connection or an electrical connection; or they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

Claims

1. A multi-stage baffled sedimentation purification device for domestic sewage, comprising a multi-stage sedimentation tank (10), a diversion chamber (20), and a separation component (30), characterized in that, The multi-stage sedimentation tank (10) is provided with several baffles (101) and several baffles (102) inside. A flow guiding channel is formed between the baffles (102) and the baffles (101). There are multiple flow guiding channels, and the multiple flow guiding channels are connected in sequence along the flow direction of the mud and water to form a multi-stage baffle sedimentation channel. The multi-stage sedimentation tank (10) is provided with several sludge hoppers (103) at the bottom, the diversion chamber (20) is located below the sludge hoppers (103), and the separation component (30) is located inside the diversion chamber (20); The outer wall of the diversion chamber (20) is fixedly connected to a top plate (203), and the bottom of the top plate (203) is fixedly connected to a mud guide plate (204). The mud and water falling from the mud hopper (103) are screened by the separation component (30). The mud is transported out of the diversion chamber (20) by the separation component (30) and falls onto the mud guide plate (204), while the water enters the diversion chamber (20).

2. The multi-stage baffle sedimentation purification device for domestic sewage according to claim 1, characterized in that, The multi-stage sedimentation tank (10) is fixedly connected to a sludge hopper (103) at the bottom, and a sludge discharge pipe (104) is fixedly connected to the bottom of the sludge hopper (103). A drive motor (106) is fixedly connected to the bottom of the sludge discharge pipe (104). A sludge discharge pipe (107) is connected to the outer wall of the sludge discharge pipe (104). A screw rod (105) is installed at the output end of the drive motor (106). The screw rod (105) is located inside the sludge discharge pipe (104). The sludge discharge pipe (107) is connected to the top of the diversion chamber (20).

3. The multi-stage baffle sedimentation purification device for domestic sewage according to claim 2, characterized in that, The diversion chamber (20) has several discharge windows (201) on its side wall. The separation component (30) includes at least two shaft blocks (301), which are fixed on both sides of the discharge window (201). A geared disc (302) is rotatably connected to the two shaft blocks (301). A chain (303) is installed on the geared disc (302), and a screening screen (304) is installed on the chain (303). The mud and water discharged from the mud discharge pipe (107) fall onto the surface of the screening screen (304), and the water passes through the screening screen (304) into the diversion chamber (20). A drive shaft (305) is mounted on the geared disc (302), and a driven wheel (306) is fixedly connected to one end of the drive shaft (305). A geared motor (307) is fixedly connected to the surface of the top plate (203), and the output end of the geared motor (307) is connected to the driven wheel (306) via a belt.

4. The multi-stage baffle sedimentation purification device for domestic sewage according to claim 3, characterized in that, A screening chamber (202) is fixedly connected to one side of the diversion chamber (20). The sewage in the diversion chamber (20) enters the screening chamber (202). The screening chamber (202) is equipped with a secondary screening component.

5. The multi-stage baffle sedimentation purification device for domestic sewage according to claim 4, characterized in that, The screening chamber (202) has a side window (205) on the side facing the mud guide plate (204). The secondary screening component includes a coarse screen (206) and a fine screen (207). The coarse screen (206) and the fine screen (207) are fixedly connected in sequence inside the side window (205). The mud on the surface of the coarse screen (206) and the fine screen (207) is discharged into the mud guide plate (204) through the side window (205).

6. The multi-stage baffle sedimentation purification device for domestic sewage according to claim 5, characterized in that, The coarse screen (206) and the fine screen (207) are both inclined, and the mesh structure of the screening screen (304), the coarse screen (206), and the fine screen (207) is arranged from large to small in sequence.

7. The multi-stage baffle sedimentation purification device for domestic sewage according to claim 5, characterized in that, Push blocks (208) are slidably provided on the surfaces of the coarse screen (206) and the fine screen (207). A slide rod (209) is fixedly connected to one end of the push block (208). The slide rod (209) slides through the side wall of the screening chamber (202). A push handle (210) is fixedly connected to the tail end of the slide rod (209). A spring (211) is sleeved on the slide rod (209).

8. The multi-stage baffle sedimentation purification device for domestic sewage according to claim 1, characterized in that, The mud guide plate (204) extends downward at an angle away from the diversion chamber (20).

9. The multi-stage baffle sedimentation purification device for domestic sewage according to claim 3, characterized in that, A baffle (40) is fixedly connected to the surface of the mud guide plate (204). The baffle (40) has a U-shaped structure, and the top of the baffle (40) is close to the surface of the screening screen (304).

10. The multi-stage baffle sedimentation purification device for domestic sewage according to claim 4, characterized in that, The bottom of the diversion chamber (20) is provided with an inclined plate (212), which is inclined toward the screening chamber (202). A viewing window (213) is provided on one side of the screening chamber (202).

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