Anti-disturbance sludge sedimentation tank

Abstract

The utility model discloses an anti-disturbance sludge sedimentation tank, which aims to solve the problems of bottom sludge disturbance and sludge discharge control lag caused by vertical water inlet impact of the conventional axial flow sedimentation tank, and realizes water flow driving rotation through a rotating rod and blades by arranging a conical flow guide cover with a spiral flow guide groove below a wastewater inlet pipe. The vertical underflushing water flow is converted into spiral diffusion flow; sludge lifting cloth is arranged at the bottom of the pond, and the sludge deposition thickness is monitored in real time by combining a tension sensor; and the sludge discharge pipe is linked with the tension sensor, and accurate sludge discharge is realized through PLC control. The flow guide cover adopts a modular design of threaded connection, and supports rapid disassembly, assembly and maintenance. The device effectively reduces the flow velocity at the bottom of the tank to a laminar flow state, inhibits secondary suspension of sludge, synchronously improves the sedimentation efficiency and the sludge discharge precision, has the advantages of reliable structure, energy conservation and consumption reduction, and is suitable for high-suspended-matter wastewater treatment scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, concretely is a kind of anti-disturbance sludge sedimentation tank. BACKGROUND

[0002] With the rapid development of industrial wastewater treatment technology, axial-flow sedimentation tank is widely used in the field of sewage treatment due to its compact structure, high treatment efficiency and other characteristics. The traditional axial-flow sedimentation tank usually adopts the basic structure of top water inlet and bottom sludge discharge. After the water flow enters the tank body in the vertical direction, solid-liquid separation is realized by gravity. However, in actual operation, the high-speed downward water flow directly impacts the sludge layer deposited at the bottom of the tank, causing the secondary suspension of the settled sludge. In addition, some improved schemes set fixed guide plates below the water inlet. Although this can disperse part of the water flow energy, the rigid structure design limits the dynamic adaptation to the change of water flow impact angle. Local vortex is easily generated at the edge of the guide plate, which further intensifies the irregular churning of the sludge layer. Moreover, the traditional sludge discharge system relies on time control or liquid level detection, which is difficult to realize real-time sensing of sludge deposition thickness. When the sludge layer exceeds the critical thickness, the shear force at the sludge-water interface increases significantly. At this time, starting sludge discharge cannot avoid the upwelling of sludge. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide an anti-disturbance sludge sedimentation tank structure with optimized flow guiding, dynamic response and intelligent control, which can achieve efficient solid-liquid separation and low-energy consumption operation.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: an anti-disturbance sludge sedimentation tank includes a sedimentation tank, a sludge collection tank bottom is arranged at the bottom of the sedimentation tank, an overflow tank is arranged at the top edge of the outer wall of the sedimentation tank, a clear liquid discharge pipe is arranged on the overflow tank, a wastewater inlet pipe is arranged at the top of the sedimentation tank, a conical flow guide cover is arranged below the pipe opening of the wastewater inlet pipe, and a plurality of flow guide grooves are uniformly distributed around the conical flow guide cover.

[0005] In the preferred scheme, a fixed cylinder is installed in the pipe opening of the wastewater inlet pipe, and a vertical rotating rod is movably arranged in the fixed cylinder.

[0006] In the preferred scheme, at least two movable rings are embedded on the inner wall of the fixed cylinder, and the inner wall of the movable ring and the rotating rod are connected and fixed by radial connecting rods.

[0007] In the preferred scheme, the upper end of the rotating rod extends upward into the wastewater inlet pipe, and the upper end of the rotating rod is provided with a blade.

[0008] In the preferred scheme, the fixed cylinder and the pipe opening of the wastewater inlet pipe are fixedly connected through thread cooperation.

[0009] In a preferred embodiment, the flow guide groove comprises an inclined groove section at the upper portion and a flat groove section at the lower portion.

[0010] In a preferred embodiment, the bottom of the sedimentation tank is provided with a mud lifting cloth, one side of the mud lifting cloth is provided with a limiting rod, the limiting rod is located outside the strip hole provided on the side wall of the sedimentation tank and realizes the fixation of one side of the mud lifting cloth, the mud lifting cloth extends downward to the bottom of the mud collecting groove and is pulled out through the strip hole provided on the side wall of the other side of the sedimentation tank, and then is connected with the tension sensor through a pulling rope.

[0011] In a preferred embodiment, the mud lifting cloth is attached to the side wall of the sedimentation tank at both sides, and a gap is formed between the bottom of the mud lifting cloth and the bottom of the mud collecting groove.

[0012] In a preferred embodiment, the bottom of the mud collecting groove is also provided with a mud discharge pipe, one end of the mud discharge pipe penetrates into the sedimentation tank, a mud discharge valve is arranged on the mud discharge pipe outside the sedimentation tank, and the mud discharge valve and the tension sensor are connected to the same control module.

[0013] The anti-disturbance sludge sedimentation tank has the following beneficial effects through the adoption of the above structure:

[0014] (1) The spiral flow guide groove of the conical flow guide cover is designed to convert the vertically downward water flow into a rotating and diffusing centrifugal motion, and in combination with the sectional flow guide groove structure, the impact force of the water flow on the bottom sludge layer is significantly reduced, the flow guide cover is dynamically rotated at different speeds through the impact force of different flow water on the blades, the water flow distribution can be automatically optimized according to the water inflow, and the stable laminar state of the sludge sedimentation area is ensured;

[0015] (2) The mechanical feedback system of the mud lifting cloth and the tension sensor is used to realize real-time sensing of the sludge deposition thickness and trigger the sludge discharge operation, solve the traditional sludge discharge lag problem, improve the sludge concentration efficiency, and avoid the secondary upwelling of sludge in the sludge discharge process;

[0016] (3) The modular threaded connection and sliding support design realizes quick disassembly and maintenance of the flow guide cover, greatly shortens the shutdown maintenance time, the surface of the flow guide cover can be made of high-smooth and corrosion-resistant materials, in combination with the centrifugal separation mechanism, the attachment of fiber impurities is effectively reduced, and the continuous operation cycle of the equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in connection with the drawings and embodiments:

[0018] Figure 1 It is the whole structure schematic diagram of the utility model.

[0019] Figure 2 It is the conical flow guide cover overhead structure schematic diagram of the utility model.

[0020] Figure 3 It is the mud collecting groove bottom side view structure schematic diagram of the utility model.

[0021] In the figure: sedimentation tank 1, sludge collecting tank bottom 2, overflow tank 3, clear liquid discharge pipe 4, wastewater inlet pipe 5, fixed cylinder 6, rotating rod 7, movable ring 8, connecting rod 9, blade 10, conical guide cover 11, guide groove 12, inclined groove section 121, flat groove section 122, sludge lifting cloth 13, limiting rod 14, tension sensor 15, sludge discharge pipe 16, sludge discharge valve 17. DETAILED DESCRIPTION

[0022] As Figures 1-2 In the present application, a disturbance-proof sludge sedimentation tank comprises a sedimentation tank 1, a sludge collecting tank bottom 2 is arranged at the bottom of the sedimentation tank 1, an overflow tank 3 is arranged along the top of the outer wall of the sedimentation tank 1, a clear liquid discharge pipe 4 is arranged on the overflow tank 3, a wastewater inlet pipe 5 is arranged at the top of the sedimentation tank 1, a conical guide cover 11 is arranged below the pipe opening of the wastewater inlet pipe 5, and a plurality of guide grooves 12 are uniformly distributed around the conical guide cover 11.

[0023] In the preferred scheme, a fixed cylinder 6 is installed in the pipe opening of the wastewater inlet pipe 5, and a vertical rotating rod 7 is movably arranged in the fixed cylinder 6.

[0024] In the preferred scheme, at least two movable rings 8 are embedded on the inner wall of the fixed cylinder 6, and the inner wall of the movable ring 8 and the rotating rod 7 are connected and fixed by radial connecting rods 9.

[0025] In the preferred scheme, the upper end of the rotating rod 7 extends upward into the wastewater inlet pipe 5, and a blade 10 is arranged at the upper end of the rotating rod 7.

[0026] In the preferred scheme, the fixed cylinder 6 and the pipe opening of the wastewater inlet pipe 5 are fixedly connected by screw threads.

[0027] In the preferred scheme, the guide groove 12 comprises an inclined groove section 121 at the upper part and a flat groove section 122 at the lower part.

[0028] In the preferred scheme, the sedimentation tank 1 is provided with a sludge lifting cloth 13, a limiting rod 14 is arranged on one side of the sludge lifting cloth 13, the limiting rod 14 is located outside the strip hole arranged on the pool wall on one side of the sedimentation tank 1 and realizes the fixation of one side of the sludge lifting cloth 13, the sludge lifting cloth 13 extends downward into the sludge collecting tank bottom 2 and is pulled out through the strip hole arranged on the pool wall on the other side of the sedimentation tank 1, and then is connected with a tension sensor 15 through a pulling rope.

[0029] In the preferred scheme, the sludge lifting cloth 13 is attached to the side wall of the sedimentation tank 1 on both sides, and a gap is formed between the bottom of the sludge lifting cloth 13 and the sludge collecting tank bottom 2.

[0030] In the preferred scheme, the sludge collecting groove bottom 2 is further provided with a sludge discharge pipe 16, one end of which penetrates into the sedimentation tank 1, and a sludge discharge valve 17 is arranged on the sludge discharge pipe 16 outside the sedimentation tank 1, and the sludge discharge valve 17 and the tension sensor 15 are connected to the same control module.

[0031] The present application discloses a disturbance-proof sludge sedimentation tank, which is used for sewage treatment.

[0032] The sewage vertically falls from the wastewater inlet pipe 5, impacts the blade 10 to drive the rotating rod 7 to rotate, and drives the conical flow guide cover 11 to rotate at a speed of 5-10 r / min, and when the water flow passes through the spiral flow guide groove 12 of the flow guide cover 11, the water flow is decomposed into multiple spiral diffusion water flows, and the vertical impact force is effectively reduced.

[0033] The diffused water flow forms a stable laminar flow in the tank body, and the sludge gradually settles on the surface of the sludge lifting cloth 13. As the sludge layer thickens, the sludge lifting cloth 13 is stretched downward under the action of gravity, and the tension of the pull rope increases. When the tension sensor 15 detects that the tension reaches a preset threshold value, it is determined that the thickness of the sludge layer exceeds 300 mm, and a signal is sent to the PLC.

[0034] The PLC control module synchronously starts the sludge discharge valve 17 and the air lifting device (not shown in the figure), a negative pressure is formed in the sludge discharge pipe 16, and the sludge in the sludge collecting groove bottom 2 is sucked and discharged.

[0035] In addition, when the flow guide cover needs to be cleaned and maintained, the water inlet is closed and the threaded connection between the fixed cylinder 6 and the wastewater inlet pipe 5 is loosened, so that the flow guide cover 11 can be taken out as a whole to wash outside the pool.

[0036] The sludge lifting cloth 13 is replaced by disconnecting the connection side of the sludge lifting cloth 13 and the tension sensor 15, pulling out the free end of the sludge lifting cloth 13 from the hole in the other side of the pool wall, and then fixing the new cloth.

Claims

1. A sludge settling tank for preventing disturbance, comprising a settling tank (1), a sludge collection trough bottom (2) at the bottom of the settling tank (1), an overflow trough (3) at the top edge of the outer wall of the settling tank (1), and a clear liquid discharge pipe (4) on the overflow trough (3), characterized in that: The sedimentation tank (1) is provided with a wastewater inlet pipe (5) at the top, and a conical guide hood (11) is provided below the outlet of the wastewater inlet pipe (5). Multiple guide grooves (12) are evenly distributed around the conical guide hood (11).

2. The sludge settling tank for preventing disturbance according to claim 1, characterized in that: A fixed cylinder (6) is installed inside the inlet of the wastewater inlet pipe (5). A vertical rotating rod (7) is movably installed inside the fixed cylinder (6), and a conical guide shroud (11) is fixedly installed at the lower end of the rotating rod (7).

3. The sludge settling tank for preventing disturbance according to claim 2, characterized in that: At least two movable rings (8) are embedded on the inner wall of the fixed cylinder (6), and the inner wall of the movable rings (8) is connected and fixed to the rotating rod (7) by a radial connecting rod (9).

4. A disturbance-resistant sludge sedimentation tank according to claim 2 or 3, characterized in that: The upper end of the rotating rod (7) extends upward into the wastewater inlet pipe (5), and the upper end of the rotating rod (7) is provided with blades (10).

5. The sludge settling tank for preventing disturbance according to claim 2, characterized in that: The fixed cylinder (6) and the wastewater inlet pipe (5) are fixedly connected by a threaded fit.

6. The sludge settling tank for preventing disturbance according to claim 1, characterized in that: The guide channel (12) includes an upper inclined channel section (121) and a lower flat channel section (122).

7. The sludge settling tank for preventing disturbance according to claim 1, characterized in that: The sedimentation tank (1) is provided with a mud lifting cloth (13) at the bottom. A limiting rod (14) is provided on one side of the mud lifting cloth (13). The limiting rod (14) is located outside the slot provided on one side of the sedimentation tank (1) and fixes one side of the mud lifting cloth (13). The mud lifting cloth (13) extends downward to the bottom (2) of the mud collection trough and passes through the slot provided on the other side of the sedimentation tank (1). It is then connected to the tension sensor (15) by a pull rope.

8. The sludge settling tank for preventing disturbance according to claim 7, characterized in that: The mud-lifting cloth (13) is attached to the side wall of the sedimentation tank (1) on both sides, and a gap is formed between the bottom of the mud-lifting cloth (13) and the bottom of the mud collection trough (2).

9. A disturbance-resistant sludge sedimentation tank according to claim 8, characterized in that: The bottom (2) of the sludge collection trough is also provided with a sludge discharge pipe (16), one end of which extends to the sedimentation tank (1). A sludge discharge valve (17) is provided on the sludge discharge pipe (16) located outside the sedimentation tank (1). The sludge discharge valve (17) and the tension sensor (15) are connected to the same control module.

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