Circumferential inlet and circumferential outlet water inlet secondary sedimentation tank with good energy dissipation effect

Abstract

The secondary sedimentation tank comprises a tank body, a flow guide pipe, an energy dissipation baffle and a vibration mechanism, a water distribution channel and a water outlet channel are arranged on the upper portion of the tank body, the flow guide pipe is arranged under the water distribution channel, and water distribution holes matched with the flow guide pipe for use are formed in the bottom of the water distribution channel at equal intervals. The energy dissipation baffle is located below the flow guide pipe and connected to the annular inner wall of the secondary sedimentation tank, a vibration mechanism is arranged on the outer side of the flow guide pipe and comprises a fixing sleeve, and the inner wall of the fixing sleeve is connected with a silica gel protective sleeve in a hot melting mode. The flow guide pipes with different lengths are arranged at equal intervals, the length of the flow guide pipes is shorter on the side away from the water inlet pipe, the flowing resistance of water flow in the flow guide pipes is increased along with the length of the flow guide pipes, and sewage entering the flow guide pipes at the front end of the water distribution channel and sewage entering the flow guide pipes at the tail end of the water distribution channel can be basically precipitated at the same time; and by arranging the vibration mechanism, the problem of sludge deposition at the bottom of the water distribution channel can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and particularly relates to a secondary sedimentation tank with a cyclic inlet and outlet and good water inlet and energy dissipation effect. Background Art

[0002] In traditional activated sludge sewage treatment process systems, secondary sedimentation tanks are usually used to precipitate the organic mixed liquor after biological treatment of the front-end sewage. The purpose of mud-water separation and sludge return is mainly achieved through natural sedimentation of the mixed liquor. The operation effect of the secondary sedimentation tank directly affects the effluent water quality indicators and is an important influencing factor in the operation of the entire biological sewage treatment system.

[0003] In order to improve the uniformity of water distribution and ensure the sludge sedimentation effect, the secondary sedimentation tank has developed from a horizontal flow sedimentation tank to a vertical flow sedimentation tank and a radial flow sedimentation tank. The radial flow sedimentation tank equipment has the advantages of high efficiency in removing suspended solids in the water, small footprint, and convenient operation and maintenance. In recent years, it has been widely used in domestic sewage and industrial sewage, especially the radial flow secondary sedimentation tank with peripheral inlet and outlet. The radial flow secondary sedimentation tank with peripheral inlet and outlet has the advantages of high surface load, good sedimentation effect, small water disturbance, and convenient sludge discharge. In the existing technology, designers give priority to the radial flow secondary sedimentation tank with peripheral inlet and outlet when designing sewage treatment plants.

[0004] However, when using a radial flow secondary sedimentation tank with a peripheral inlet and outlet, high technical requirements are usually placed on the construction of the water distribution channel with a gradual cross-section, which often fails to meet the design accuracy requirements. It is difficult to distribute water evenly in the water distribution channel around the secondary sedimentation tank, and the water inlet flow rate is not adaptable. When a large flow rate enters the tank rapidly, the water itself enters the sedimentation area in the tank in a turbulent flow state with greater kinetic energy and potential energy, destroying the sedimentation effect.

[0005] The above two problems are both manifested as difficulty in evenly distributing water, which makes it easy for the water body to destroy the main sedimentation effect due to its own large kinetic energy. Utility Model Content

[0006] The purpose of the utility model is to address the deficiencies of the prior art and to propose a secondary sedimentation tank with circumferential water inlet and outlet and good energy dissipation effect, so as to solve the problem that the existing equipment is difficult to distribute water evenly, making it easy for the water body to destroy the sedimentation effect of the main body due to its own large kinetic energy.

[0007] The technical purpose of the utility model is achieved through the following technical solutions: a secondary sedimentation tank with good circumferential water inlet and outlet energy dissipation effect, comprising a tank body, a water distribution channel and a water outlet channel are arranged on the upper part of the tank body, and also comprises a guide pipe, an energy dissipation baffle and a vibration mechanism. The guide pipe is arranged directly below the water distribution channel, and water distribution holes for use with the guide pipe are opened at equal intervals at the bottom of the water distribution channel. The energy dissipation baffle is located below the guide pipe, and the energy dissipation baffle is connected to the annular inner wall of the secondary sedimentation tank. A vibration mechanism is arranged on the outer side of the guide pipe, and the vibration mechanism comprises a fixed sleeve, and the inner wall of the fixed sleeve is hot-melt connected with a silicone sheath.

[0008] Preferably, the guide pipes are distributed at equal intervals along the water distribution channel, and the guide pipes are connected to the water distribution holes at the bottom of the water distribution channel.

[0009] Preferably, the water distribution channel is connected to a water inlet pipe, and the water outlet channel is connected to a water outlet pipe.

[0010] Preferably, connecting rods are welded on the upper and lower end surfaces of the fixed sleeve, a sliding plate is provided on the movable sleeve of the connecting rod, a limiting block is welded on the side of the connecting rod away from the fixed sleeve, an amplification spring is provided on the sliding sleeve of the connecting rod between the sliding plate and the limiting block, and a vibration motor is connected to the right side of the sliding plate by bolts.

[0011] Preferably, a mud scraper and a mud discharge pipe are provided in the pool body.

[0012] Preferably, a baffle is welded to the bottom of the water distribution channel.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model provides a secondary sedimentation tank with good circumferential water inlet and outlet energy dissipation effect. By arranging guide pipes with equal intervals and different lengths, and the length of the guide pipe is shorter on the side away from the water inlet pipe, the flow resistance of water flow in the guide pipe increases with the length of the guide pipe, so that the sewage entering the guide pipe at the front end of the water distribution channel and the sewage entering the guide pipe at the end of the water distribution channel can be precipitated at the same time, which is beneficial to the stratified precipitation of sludge and improves the mud and water separation effect; by arranging an energy dissipation baffle, the mixed liquid in the guide pipe quickly reduces the kinetic energy of the water after falling to the energy dissipation baffle, so that the water flow is urged to flow in the secondary sedimentation tank in a low-speed laminar flow state, and the influence of the high water flow velocity on the sludge precipitation is reduced; by arranging a vibration mechanism, the sludge at the bottom of the water distribution channel is vibrated and intervened, so that the sludge is urged to move forward along the water distribution channel under hydraulic scouring and enter the tank body through the guide pipe.

[0015] The utility model provides a secondary sedimentation tank with cyclic water inlet and outlet and good energy dissipation effect. The water inlet process has a good energy dissipation effect to reduce the sedimentation phenomenon of suspended activated sludge at the end of the water distribution channel, improve the resistance of the secondary sedimentation tank to changes in the water inlet flow rate, create sludge stratified sedimentation conditions, and improve the water quality of sewage treatment effluent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the local structure of the utility model.

[0018] Figure 3 It is a top view and cross-sectional schematic diagram of the local structure of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the flow guide pipe in the utility model.

[0020] Figure 5 for Figure 4 Enlarged schematic diagram of part A in the middle.

[0021] In the above drawings: 1. walkway plate; 2. water distribution channel; 3. water outlet channel; 4. sludge scraper; 5. water inlet pipe; 6. sludge discharge pipe; 7. water outlet pipe; 8. water distribution hole; 9. energy dissipation baffle; 10. guide pipe; 11. baffle; 12. vibration mechanism; 13. silicone sheath; 14. fixing sleeve; 15. connecting rod; 16. sliding plate; 17. amplification spring; 18. limit block; 19. vibration motor. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] As a preferred embodiment of the present invention, Figure 1-Figure 5As shown, the present embodiment provides a secondary sedimentation tank with good circumferential water inlet and outlet energy dissipation effect, including a walkway plate 1, a water distribution channel 2, a water outlet channel 3, a guide pipe 10, a water distribution hole 8, the guide pipe 10, a vibration mechanism 12, and a fixed sleeve 14, including a tank body, a water distribution channel 2 and a water outlet channel 3 are provided on the upper part of the tank body, and it is characterized in that it also includes a guide pipe 10, an energy dissipation baffle 9 and a vibration mechanism 12, the guide pipe 10 is arranged directly below the water distribution channel 2, and the water distribution holes 8 used in conjunction with the guide pipe 10 are opened at equal intervals at the bottom of the water distribution channel 2, the energy dissipation baffle 9 is located below the guide pipe 10, and the energy dissipation baffle 9 is connected to the annular inner wall of the secondary sedimentation tank, the outer side of the guide pipe 10 is provided with a vibration mechanism 12, and the vibration mechanism 12 includes a fixed sleeve 14, and the inner wall of the fixed sleeve 14 is hot-melt connected with a silicone sheath 13.

[0024] When in use, the mixed liquid flows to the water distribution channel 2 through the water inlet pipe 5, and enters the guide pipe 10 below through the water distribution hole 8. The guide pipes 10 are arranged at equal intervals along the water inlet direction of the water distribution channel 2. The length of the guide pipe 10 depends on the distance between the water distribution channel 2 and the water inlet pipe 5. The shorter the guide pipe 10 away from the water inlet pipe 5, the flow resistance of the mixed liquid in the guide pipe 10 increases with the length of the guide pipe 10. The mixed liquid entering the guide pipe 10 at the head end of the water distribution channel 2 has a large flow resistance and a slow downstream speed. The mixed liquid entering the guide pipe 10 at the end of the water distribution channel 2 has a small flow resistance and a fast downstream speed, which causes the mixed liquid entering the water distribution channel 2 to fall onto the energy dissipation baffle 9 at basically the same time. Under the energy dissipation effect of the energy dissipation baffle 9, the mixed liquid quickly diffuses and moves in the two-layer pool in a laminar flow state, which is beneficial to the stratified sedimentation of mud and water and improves the water quality of the effluent.

[0025] When there is sedimentation at the bottom of the water distribution channel 2, the user can start the vibration motor 19 through the external controller. The vibration motor 19 drives the connecting rod 15 to vibrate through the sliding plate 16, thereby driving the silicone sheath 13 to vibrate through the fixing sleeve 14. The silicone sheath 13 drives the guide pipe 10 to perform contact vibration, thereby driving the bottom of the water distribution channel 2 to vibrate. Under the influence of hydraulic scouring and vibration, the sedimentation at the bottom of the water distribution channel 2 moves forward and can enter the pool through the guide pipe 10.

[0026] This embodiment mainly considers that during use, by arranging diversion pipes 10 with gradually varying lengths at equal intervals at the bottom of the water distribution channel 2, arranging baffles 11 at the bottom of the water distribution channel 2, arranging energy dissipation baffles 9 on the inner wall of the tank, and arranging a vibration mechanism 12 on the diversion pipe 10, etc., so as to improve the resistance capacity of the secondary sedimentation tank to the water inlet flow, reduce the sludge at the bottom of the water distribution channel, create conditions for sludge stratification and sedimentation, and improve the water quality of sewage treatment effluent.

[0027] Specifically, the energy dissipation baffle 9 can be made of a carbon steel anti-corrosion metal mesh with a plurality of square through holes, the square holes are 5mm×5mm and are evenly spaced, and the energy dissipation baffle 9 is vertically arranged along the inner wall of the secondary sedimentation tank. The energy dissipation baffle 11 can be pre-buried in the secondary sedimentation tank body during the construction period, or the energy dissipation baffle can be combined and connected with the secondary sedimentation tank wall by a concave-convex buckle structure.

[0028] In some embodiments, Figure 4 and Figure 5 As shown, the inner wall of the fixing sleeve 14 is hot-melt connected with the silicone sleeve 13, and the inner wall of the silicone sleeve 13 is hot-melt connected with the surface of the guide tube 10, so as to ensure the stability of the connection and prevent the connection relationship from being damaged during long-term operation.

[0029] In some embodiments, Figure 4 and Figure 5 As shown, connecting rods 15 are welded on the upper and lower end surfaces of the fixed sleeve 14, and a sliding plate 16 is movably sleeved on the connecting rod 15. A limiting block 18 is welded on the side of the connecting rod 15 away from the fixed sleeve 14, and an amplification spring 17 is provided on the sliding sleeve of the connecting rod 15 between the sliding plate 16 and the limiting block 18. A vibration motor 19 is connected to the right side of the sliding plate 16 by bolts. In this embodiment, the vibration mechanism is used to prevent the blockage of the guide pipe on the one hand, and on the other hand, vibration intervention is performed on the sludge at the bottom of the water distribution channel, so that the sludge moves forward under the influence of hydraulic scouring and vibration, and enters the pool body through the guide pipe.

[0030] This embodiment mainly considers that during use, by providing the amplification spring 17, the amplitude can be effectively expanded, thereby improving the vibration transmission effect of the main body.

[0031] On the basis of the above embodiments, a mud scraper 4 and a mud discharge pipe 6 are provided in the pool body.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A secondary sedimentation tank with a circumferential water inlet and outlet and good energy dissipation effect, comprising a tank body, a water distribution channel (2) and a water outlet channel (3) are arranged on the upper part of the tank body, and the characteristics are: The invention also comprises a guide pipe (10), an energy dissipation baffle (9) and a vibration mechanism (12), wherein the guide pipe (10) is arranged directly below the water distribution channel (2), and water distribution holes (8) for use with the guide pipe (10) are provided at equal intervals at the bottom of the water distribution channel (2), the energy dissipation baffle (9) is located below the guide pipe (10), and the energy dissipation baffle (9) is connected to the annular inner wall of the secondary sedimentation tank, and a vibration mechanism (12) is arranged on the outer side of the guide pipe (10), and the vibration mechanism (12) comprises a fixing sleeve (14), and the inner wall of the fixing sleeve (14) is connected to a silicone sleeve (13) by hot-melt connection.

2. A secondary sedimentation tank with circumferential water inlet and outlet and good energy dissipation effect according to claim 1, characterized in that: The flow guide pipes (10) are distributed at equal intervals along the water distribution channel (2), and the flow guide pipes (10) are connected to the water distribution holes (8) at the bottom of the water distribution channel (2).

3. A secondary sedimentation tank with circumferential water inlet and outlet and good energy dissipation effect according to claim 1, characterized in that: The water distribution channel (2) is connected to a water inlet pipe (5), and the water outlet channel (3) is connected to a water outlet pipe (7).

4. The secondary sedimentation tank with circumferential water inlet and outlet and good energy dissipation effect according to claim 1 is characterized in that: A connecting rod (15) is welded to both upper and lower end surfaces of the fixed sleeve (14); a movable sleeve on the connecting rod (15) is provided with a sliding plate (16); a limiting block (18) is welded to a side of the connecting rod (15) away from the fixed sleeve (14); an amplifying spring (17) is provided on the sliding sleeve on the connecting rod (15) between the sliding plate (16) and the limiting block (18); and a vibration motor (19) is connected to the right side of the sliding plate (16) via bolts.

5. The secondary sedimentation tank with circumferential water inlet and outlet and good energy dissipation effect according to claim 1 is characterized in that: A mud scraper (4) and a mud discharge pipe (6) are provided in the pool body.

6. The secondary sedimentation tank with circumferential water inlet and outlet and good energy dissipation effect according to claim 1 is characterized by: A baffle (11) is welded to the bottom of the water distribution channel (2).

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