Sewage precipitation device for environmental engineering

Abstract

The utility model discloses a sewage precipitation device for environmental protection engineering relates to the field of environmental protection engineering, aims at solving the problem of unstable water flow and the floating scum of precipitation mixing in the precipitation link of sewage treatment can not be effectively separated, influence the water quality of effluent, including mixing pool, the side of mixing pool is connected with the sedimentation tank, is equipped with the inclined tube filling material in the sedimentation tank, the lower portion of inclined tube filling material is equipped with the sedimentation hopper, the side of inclined tube filling material is equipped with the effluent weir, the upper portion of effluent weir is equipped with the filter plate, the side of effluent weir is connected with the drainage pool, the drainage pool upper portion is connected with the blowdown tank, is equipped with the scraper assembly on the blowdown tank upper portion, and the advantage lies in: through mixing pool and scraper assembly, the water flow of inlet is stabilized, and the automatic collection and separation of floating scum are realized, and the clarity and stability of effluent are ensured.

Description

Technical Field

[0001] This utility model relates to the field of environmental engineering technology, and in particular to a wastewater sedimentation device for environmental engineering. Background Technology

[0002] In the field of environmental engineering and water treatment, sedimentation tanks are one of the core structures for the physicochemical treatment of wastewater. Their function is to effectively remove suspended solid particles and some colloidal substances from water through gravity settling. To improve settling efficiency, flocculants, coagulants, and other chemical solutions are usually added to the wastewater in the mixing reaction zone at the front end of the sedimentation tank. This causes the fine suspended particles to destabilize and aggregate, forming larger flocs (lumps) that are easier to settle.

[0003] However, many existing wastewater sedimentation devices, especially when treating wastewater with large flow rates or fluctuating water quality, have revealed some long-standing and urgent technical shortcomings: First, the water flow pattern is unstable, making it prone to "short-circuiting." An ideal sedimentation device requires the influent to be evenly and stably distributed across the entire cross-section of the tank, with the water flowing slowly forward in a near-laminar state to create sufficient settling conditions for suspended solids. However, in reality, due to unreasonable inlet design, simple water distribution facilities, or factors such as temperature and density differences, the water flow often cannot be evenly distributed. Some water flows rapidly through the sedimentation zone at a velocity higher than the design velocity, directly flowing towards the outlet; this phenomenon is called "short-circuiting." The direct consequence of short-circuiting is that a large amount of unsettled flocs are carried away by the high-speed water flow, resulting in turbid effluent, excessive suspended solids (SS) levels, and severely reducing the actual treatment efficiency of the sedimentation tank.

[0004] Secondly, the problem of scum formation seriously affects the treatment effect and effluent quality. During the mixing and reaction of wastewater with flocculants, coagulants, and other chemical solutions, especially when treating wastewater containing specific organic matter, surfactants, or oils, a large amount of viscous, stable scum is easily generated. Because this scum is less dense than water, it will continuously float on the surface of the sedimentation tank, interfering with the operator's observation and judgment of the sedimentation process. Most importantly, the scum located near the effluent weir will be collected and discharged along with the upper clarified water. This scum contains a large number of incompletely settled micro-flocs, colloidal particles, and other light impurities. Their inclusion directly contaminates the treated supernatant, resulting in substandard effluent quality. In addition, after being discharged, the scum carrying pollutants may clog subsequent filtration units or become visible pollutants in the discharged wastewater, causing secondary pollution. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a sewage sedimentation device for environmental protection engineering. This design effectively solves the problems of unstable influent flow and inability to effectively separate the sludge mixed with sediment in the sedimentation process of sewage treatment, which affects the quality of effluent.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The present invention includes a mixing tank, a sedimentation tank connected to the side of the mixing tank, an inclined tube packing material inside the sedimentation tank, a sedimentation hopper below the inclined tube packing material, an outlet weir on the side of the inclined tube packing material, a filter plate above the outlet weir, a drainage tank connected to the side of the outlet weir, a sludge discharge trough connected above the drainage tank, and a scraper assembly above the sludge discharge trough.

[0007] Preferably, the scraper assembly includes a support frame, which is fixedly connected to the sedimentation tank. Two sets of sprockets are rotatably connected to the support frame, and chains are fitted onto the two sets of sprockets. A foam scraper is fixedly connected to the chain, and the foam scraper is located above the filter plate.

[0008] Preferably, the mixing tank includes an inlet chamber and a buffer chamber, a gate is provided between the inlet chamber and the buffer chamber, the bottom of the gate is provided with a liquid permeation hole, a first outlet pipe is connected above the buffer chamber, and the other end of the first outlet pipe extends to the side of the inclined tube packing.

[0009] Preferably, the sedimentation hopper is fixedly connected to the sedimentation tank, the sedimentation hopper has a funnel-shaped structure, and a sewage pipe is connected to the side of the sedimentation hopper.

[0010] Preferably, a second outlet pipe is provided on the side of the outlet weir, and the other end of the second outlet pipe extends to the bottom of the drainage pool, and a drainage pipe is connected inside the drainage pool.

[0011] Preferably, the outlet weir is provided with a guide channel.

[0012] Preferably, the buffer chamber is provided with an emergency drain hole on its side, which is located below the first outlet pipe.

[0013] Compared with the prior art, the outstanding advantages of this utility model are: This application adds a mixing tank before the sedimentation tank. The mixing tank buffers the water flow, making the water flow more stable when it enters the mixing tank and quickly reaching a laminar flow state. This effectively prevents short-circuiting and creates ideal hydraulic conditions for sedimentation.

[0014] This application effectively prevents scum from being discharged with the effluent through the filter plate and scraper assembly, and uniformly treats the scum to avoid scum accumulation on the surface of the sedimentation tank, making it easier to observe the internal condition of the sedimentation tank and ensuring the quality of the effluent. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the scraper assembly structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the sedimentation tank of this utility model.

[0019] Figure 5 This is a schematic diagram of the side cross-sectional structure of the mixing tank of this utility model.

[0020] Figure 6 This is a schematic diagram of the settling bucket structure of this utility model.

[0021] The diagram is labeled as follows: 1. Mixing tank; 101. Inlet chamber; 102. Buffer chamber; 103. Gate; 104. Liquid permeation hole; 2. Sedimentation tank; 3. Inclined tube packing; 4. Sedimentation hopper; 5. Effluent weir; 6. Filter plate; 7. Drainage tank; 8. Sewage trough; 9. Support frame; 10. Sprocket; 11. Chain; 12. Foam scraper; 13. First outlet pipe; 14. Sewage pipe; 15. Second outlet pipe; 16. Drainage pipe; 17. Guide channel; 18. Emergency drain hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see the appendix Figure 1-6 This embodiment discloses a wastewater sedimentation device for environmental engineering: it includes a mixing tank 1, a sedimentation tank 2 connected to the side of the mixing tank 1, an inclined tube packing 3 inside the sedimentation tank 2, a sedimentation hopper 4 below the inclined tube packing 3, an effluent weir 5 on the side of the inclined tube packing 3, a filter plate 6 above the effluent weir 5, a drainage tank 7 connected to the side of the effluent weir 5, a sewage discharge trough 8 connected above the drainage tank 7, and a scraper assembly above the sewage discharge trough 8.

[0024] Mixing tank 1 receives raw water and adds flocculants; its side is connected to sedimentation tank 2 via pipes or orifices. The mixed liquid in mixing tank 1 flows into sedimentation tank 2 due to the water level difference. Sedimentation tank 2, from bottom to top, mainly consists of: a sedimentation hopper 4 for collecting large sludge particles; inclined tube packing 3 installed above the sedimentation hopper 4, which greatly increases the sedimentation area using the shallow tank principle, accelerating the separation of solid particles; and an effluent weir 5 located on the side of the treated water flow from the inclined tube packing 3 for collecting the upper clarified water. Above the effluent weir 5, a filter plate 6 is installed, submerged to a certain depth below the water surface, to intercept large floating objects. The outlet of the effluent weir 5 is connected to drainage tank 7 via a channel or pipe. Above drainage tank 7, a sludge discharge trough 8 is fixedly connected for collecting and temporarily storing floating pollutants such as foam. Above the sewage discharge trough 8, a scraper assembly is provided to scrape the foam into the sewage discharge trough 8. At the same time, the scraper assembly can clean the foam on the filter plate 6 to prevent the filter plate 6 from being blocked by foam and to ensure the smooth flow of the sedimentation tank 2 and the effluent weir 5.

[0025] In this application, during the settling process in the sedimentation tank 2, the generated foam is initially intercepted by the filter plate 6 and automatically collected to the sewage discharge tank 8 by the scraper assembly, effectively preventing the foam from being discharged with the effluent and solving the problem of foam affecting water quality.

[0026] The support frame 9 inside the scraper assembly is located on the outside of the sedimentation tank 2. Two sets of sprockets 10 are rotatably connected to the support frame 9 via bearing seats. The two sets of sprockets 10 are located at both ends of the sedimentation tank 2. Two parallel chains 11 are installed on the two sets of sprockets 10. Multiple froth scrapers 12 are fixedly connected to the chains 11 at certain intervals. The bottom edge of the froth scraper 12 maintains slight contact or a very small gap with the upper surface of the filter plate 6. The upper surface of the filter plate 6 is at the same height as the upper surface of the sludge discharge trough 8. The sprockets 10 are driven by a motor and a reducer (not shown in the figure) installed on the support frame 9.

[0027] After the drive motor starts, it drives the sprocket 10 to rotate, thereby driving the chain 11 and the foam scraper 12 on it to move slowly along the surface of the filter plate 6. The moving foam scraper 12 steadily pushes the foam accumulated in front of (or above) the filter plate 6 into the sewage trough 8 at the end. This mechanical scraping method is highly efficient and stable in operation, realizing automatic and continuous cleaning of foam, completely solving the problem of low efficiency of manual dredging, and ensuring the cleanliness of the water surface.

[0028] The mixing tank 1 is divided into an inlet chamber 101 and a buffer chamber 102 by a gate 103. The raw water inlet pipe is installed in the inlet chamber 101, while the first outlet pipe 13 is installed in the buffer chamber 102. In particular, a permeable hole 104 is provided at the bottom of the gate 103. The inlet chamber 101 and the buffer chamber 102 form a structure similar to a communicating vessel under the action of the permeable hole 104. In this way, the liquid entering the buffer chamber 102 will be relatively gentle, and the raw water and the medicine can settle better in the gentle liquid environment. The raw water flow in the inlet chamber 101 is relatively large. When the medicine is added to the inlet chamber 101, the large water flow can make the medicine and the raw water mix thoroughly.

[0029] Working principle and beneficial effects: Wastewater first enters the inlet chamber 101. When the water flows through the permeable hole 104 at the bottom of the gate 103, the large water flow impact is broken down into countless tiny jets, and the energy is significantly attenuated. After entering the buffer chamber 102, the water flow becomes more stable. Finally, it enters the sedimentation tank 2 in a near-laminar state through the first outlet pipe 13, which is located at a higher position. This design of "bottom fine hole energy dissipation + high-level outflow" greatly stabilizes the inlet water flow, effectively prevents short-circuiting, and creates ideal hydraulic conditions for subsequent sedimentation.

[0030] A sedimentation hopper 4 is provided below the inclined tube packing 3 and is designed as a funnel-shaped structure. The lowest point of its side is connected to a drain pipe 14. The settled sludge accumulates in the sedimentation hopper 4 and can be discharged periodically through the drain pipe 14 to prevent sludge accumulation from affecting the effect.

[0031] A second discharge pipe 15 is provided on the side of the discharge weir 5, and its other end extends to the bottom of the drainage pool 7. This bottom water inlet method can avoid generating new disturbances and foam in the drainage pool 7. The drainage pool 7 is then connected to the final drainage pipe 16. The guide channel 17 above the discharge weir 5 is used to assist in drainage and improve the efficiency of liquid drainage into the drainage pool 7.

[0032] An emergency drain hole 18 is provided on the side wall of the buffer chamber 102, below the first outlet pipe 13. The emergency drain hole 18 is normally closed, but can be opened for emergency drainage when the mixing tank 1 needs to be repaired or when an accidental blockage occurs, which improves the safety and maintainability of the system.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wastewater sedimentation device for environmental engineering, characterized in that: The system includes a mixing tank (1), a sedimentation tank (2) connected to the side of the mixing tank (1), an inclined tube packing (3) inside the sedimentation tank (2), a sedimentation hopper (4) below the inclined tube packing (3), an outlet weir (5) on the side of the inclined tube packing (3), a filter plate (6) above the outlet weir (5), a drainage tank (7) connected to the side of the outlet weir (5), a sludge trough (8) connected above the drainage tank (7), and a scraper assembly above the sludge trough (8).

2. The wastewater sedimentation device for environmental engineering according to claim 1, characterized in that: The scraper assembly includes a support frame (9), which is fixedly connected to the sedimentation tank (2). Two sets of sprockets (10) are rotatably connected to the support frame (9), and chains (11) are fitted on the two sets of sprockets (10). A foam scraper (12) is fixedly connected to the chain (11), and the foam scraper (12) is located above the filter plate (6).

3. The wastewater sedimentation device for environmental engineering according to claim 1, characterized in that: The mixing tank (1) includes an inlet chamber (101) and a buffer chamber (102). A gate (103) is provided between the inlet chamber (101) and the buffer chamber (102). A liquid permeation hole (104) is provided at the bottom of the gate (103). A first outlet pipe (13) is connected above the buffer chamber (102). The other end of the first outlet pipe (13) extends to the side of the inclined tube packing (3).

4. The wastewater sedimentation device for environmental engineering according to claim 1, characterized in that: The sedimentation hopper (4) is fixedly connected to the sedimentation tank (2). The sedimentation hopper (4) has a funnel-shaped structure and a sewage pipe (14) is connected to the side of the sedimentation hopper (4).

5. A wastewater sedimentation device for environmental engineering according to claim 1, characterized in that: The outlet weir (5) is provided with a second outlet pipe (15) on its side. The other end of the second outlet pipe (15) extends to the bottom of the drainage pool (7). The drainage pool is connected to a drainage pipe (16).

6. A wastewater sedimentation device for environmental engineering according to claim 1 or 5, characterized in that: The outlet weir (5) is provided with a guide channel (17).

7. A wastewater sedimentation device for environmental engineering according to claim 3, characterized in that: The buffer chamber (102) is provided with an emergency drain hole (18) on its side, which is located below the first outlet pipe (13).

Images