Gravity perforated pipe sludge discharge system for settling pond of waterworks

Abstract

A gravity perforated pipe sludge discharging system for a settling pond in a waterworks comprises a sludge discharging pipe, a support is fixedly installed in a V-shaped groove in the bottom of the settling pond, the sludge discharging pipe is fixedly installed on the support through a first pipe clamp, holes are formed in the lower portions of the two side faces of the sludge discharging pipe in a staggered mode, and an inner flushing pipe is fixedly installed at the top in the sludge discharging pipe through a second pipe clamp. Inner flushing holes are formed in the lower portion of the upper side face of the inner flushing pipe in a staggered mode, and the included angle between the axis of each inner flushing hole and the vertical direction is 60 degrees. An outer flushing pipe is fixedly installed below the sludge discharging pipe through a third pipe clamp, outer flushing holes are formed in the upper portion of the side face of the outer flushing pipe in a staggered mode, the inner flushing holes and the outer flushing holes in the corresponding side and holes in the sludge discharging pipe on the side are located in the same vertical section in the radial direction of the sludge discharging pipe, and the included angle between the axis of each outer flushing hole and the vertical direction is 45 degrees. The inner flushing pipe and the outer flushing pipe are both connected with an external water supply pipeline, and switch valves are installed on the outer flushing pipe and the inner flushing pipe. The system is good in sludge discharge effect.

Description

Technical Field

[0001] The utility model relates to water treatment in a waterworks, in particular to a gravity porous pipe mud discharge system in a sedimentation tank of a waterworks, belonging to the technical field of water treatment. Background Art

[0002] The water production process designed by the applicant's water plant adopts conventional turbidity removal, disinfection and water treatment processes. The plant uses a reservoir as its water source, enters the plant area through a water diversion pipeline, enters the plant area sedimentation tank through two DN800 valves, enters the double-valve filter tank to the clear water tank after dosing, chlorination, mixing, flocculation reaction and precipitation, and finally enters the city water supply network through the water supply pump room under pressure. The mud discharge method designed by the water plant at the water inlet of the horizontal flow sedimentation tank adopts the mud discharge method of vertical sewage pump extraction. In actual operation, it is found that this method has many problems. The main problem of this mud discharge method is: when the vertical sewage pump is used to extract sludge, it runs idle due to the hard sludge and cannot be pumped, resulting in poor mud discharge, resulting in the porous mud discharge pipe DN200 installed in the "V" groove at the bottom of the sedimentation tank at the water inlet often being blocked. Since the sludge at the water inlet of the sedimentation tank cannot be discharged in time and effectively, the sludge at the outlet is accumulated, which reduces the water flow area of ​​the water inlet and affects the water quality of the sedimentation tank outlet. Summary of the invention

[0003] The purpose of the utility model is to overcome the above problems existing in the current sedimentation tank mud discharge, and to provide a gravity porous pipe mud discharge system for the sedimentation tank of a water plant.

[0004] In order to achieve the purpose of the utility model, the following technical scheme is adopted: a gravity mud discharge pipe mud discharge system of a water plant sedimentation tank, including a mud discharge pipe, a bracket is fixedly installed in the V-shaped groove at the bottom of the sedimentation tank, the mud discharge pipe is fixedly installed on the bracket through a first pipe clamp, one end of the mud discharge pipe extends out of the sedimentation tank, the other end is closed, and a valve is installed at the end of the end extending out of the sedimentation tank; holes are staggered at the lower part of the two side surfaces of the mud discharge pipe, the distance between two adjacent holes on the mud discharge pipe is 300-350mm, the angle between the axis of the hole and the vertical direction is 60 degrees, and the top of the mud discharge pipe is opened through the first pipe clamp. An inner flushing pipe is fixedly installed by the second pipe clamp, and inner flushing holes are staggered on the lower part of the side of the inner flushing pipe, and the angle between the axis of the inner flushing hole and the vertical direction is 60 degrees; an outer flushing pipe is fixedly installed by the third pipe clamp below the mud discharge pipe, and outer flushing holes are staggered on the upper part of the side of the outer flushing pipe, and the inner flushing holes and the outer flushing holes on the corresponding side and the holes on the mud discharge pipe on that side are located on the same vertical section along the radial direction of the mud discharge pipe, and the angle between the axis of the external flushing hole and the vertical direction is 45 degrees, and the inner flushing pipe and the outer flushing pipe are both connected to the external water supply pipeline, and switch valves are installed on the outer flushing pipe and the inner flushing pipe.

[0005] Furthermore, the distance between the holes on the mud discharge pipe located in the sedimentation tank near the valve end is 350mm, and the distance between the holes away from the valve end is 300mm. The mud discharge pipe adopts DN200, the internal flushing pipe adopts DN40, and the external flushing pipe adopts DN50.

[0006] Furthermore, the external flushing pipe is located under the bracket.

[0007] Furthermore, an exhaust valve is also installed on the water supply pipeline of the external flushing pipe outside the sedimentation tank.

[0008] The positive and beneficial technical effect of the utility model is that the system has a good mud discharge effect and can ensure the stable operation of the horizontal flow sedimentation tank, which is explained in detail in conjunction with the specific implementation method. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the utility model.

[0010] Figure 2 yes Figure 1 Schematic diagram of the mid-AA section. DETAILED DESCRIPTION

[0011] In order to more fully explain the implementation of the utility model, implementation examples of the utility model are provided. These implementation examples are only for the purpose of illustrating the utility model and do not limit the scope of the utility model.

[0012] The utility model is further explained in detail in conjunction with the accompanying drawings, in which the marks are: 1: mud discharge pipe; 2: valve; 3: water supply pipeline; 4: internal flushing pipe; 5: internal flushing pipe switch valve; 6: external flushing pipe; 7: external flushing pipe switch valve; 8: exhaust valve; 9: first pipe clamp; 10: second pipe clamp; 11: third pipe clamp 12: bracket; 13: hole; 14: internal flushing hole; 15: external flushing hole.

[0013] As shown in the attached drawings, a mud discharge system for a gravity mud discharge pipe in a sedimentation tank of a water plant includes a mud discharge pipe 1. In this embodiment, the mud discharge pipe adopts DN200, and a bracket 12 is fixedly installed in the V-shaped groove at the bottom of the sedimentation tank. The V-shaped groove of the sedimentation tank is an existing structure. The mud discharge pipe 1 is fixedly installed on the bracket through a first pipe clamp 9. One end of the mud discharge pipe extends out of the sedimentation tank and the other end is closed. A valve 2 is installed at the end extending out of the sedimentation tank; the mud can be discharged by opening the valve 2, and the mud can be stopped by closing the valve 2. Holes 13 are staggered at the lower part of the two sides of the mud discharge pipe. The staggered opening refers to the staggered opening of one on the left and one on the right in a cycle. The distance between two adjacent holes is 300-350mm. The spacing of the holes on the length of the mud discharge pipe in the sedimentation tank close to the valve end is 350mm, and the spacing of the holes away from the valve end is 300mm. In this embodiment, the length of the mud discharge pipe in the sedimentation tank is 13400, the diameter of the hole is 25mm, the angle between the axis of the hole and the vertical direction is 60 degrees, the spacing of the 21 holes on the valve end is 350mm, and the spacing of the remaining holes is 300mm. The purpose of such non-uniform hole matching is to ensure uniform mud discharge and flushing. After simulation and testing, the pressure of mud discharge and flushing in the mud discharge pipe with such hole matching is relatively uniform. An exhaust valve 8 is also installed on the water supply pipeline of the external flushing pipe outside the sedimentation tank. The exhaust valve can prevent gas from entering, resulting in unstable operation.

[0014] An inner flushing pipe 4 is fixedly installed at the top of the mud discharge pipe through a second pipe clamp 10, and inner flushing holes 14 are staggered on the lower part of the upper side of the inner flushing pipe 4, and the angle between the axis of the inner flushing hole 14 and the vertical direction is 60 degrees; an outer flushing pipe 6 is fixedly installed below the mud discharge pipe through a third pipe clamp 11, and the outer flushing pipe is located under the bracket 12, and outer flushing holes 15 are staggered on the upper part of the side of the outer flushing pipe. The inner flushing holes and the outer flushing holes on the corresponding side and the holes on the mud discharge pipe on this side are located on the same vertical section along the radial direction of the mud discharge pipe. Figure 2 As shown are the holes, inner flushing holes and outer flushing holes on the same side, the angle between the axis of the outer flushing hole and the vertical direction is 45 degrees, the inner flushing pipe and the outer flushing pipe are both connected to the external water supply pipeline 3, and switch valves are installed on the outer flushing pipe and the inner flushing pipe. Figure 1 In the figure, 5 is an inner flushing pipe switch valve, and 7 is an outer flushing pipe switch valve; in this embodiment, the inner flushing pipe adopts DN40, the outer flushing pipe adopts DN50, and the diameters of the inner flushing hole and the outer flushing hole are both 6mm.

[0015] By using this system, the valve is opened once a day to discharge sludge for 10-15 minutes, which can maintain stable operation of the horizontal flow sedimentation tank. Internal and external cleaning can be opened once a week to meet the operation requirements. After running for a period of time, it was found that the effect of this sludge discharge system is much better than the sludge discharge method using a vertical sewage pump.

[0016] After describing the implementation mode of the utility model in detail, people familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the scope of the technical solution of the utility model, and the utility model is not limited to the implementation mode of the examples given in the specification.

Claims

1. A gravity porous pipe mud discharge system for a waterworks sedimentation tank, comprising a mud discharge pipe, characterized in that: A bracket is fixedly installed in the V-shaped groove at the bottom of the sedimentation tank, and a mud discharge pipe is fixedly installed on the bracket through a first pipe clamp. One end of the mud discharge pipe extends out of the sedimentation tank and the other end is closed. A valve is installed at the end of the end extending out of the sedimentation tank. Holes are staggered at the lower part of the two side surfaces of the mud discharge pipe. The distance between two adjacent holes on the mud discharge pipe is 300-350mm, and the angle between the axis of the hole and the vertical direction is 60 degrees. An inner flushing pipe is fixedly installed at the top of the mud discharge pipe through a second pipe clamp. The lower part of the side surface of the inner flushing pipe is staggered. An internal flushing hole is provided, and the angle between the axis of the internal flushing hole and the vertical direction is 60 degrees; an external flushing pipe is fixedly installed below the mud discharge pipe by a third pipe clamp, and external flushing holes are staggered on the upper part of the side of the external flushing pipe, and the internal flushing holes and external flushing holes on the corresponding side and the holes on the mud discharge pipe on this side are located on the same vertical section along the radial direction of the mud discharge pipe, and the angle between the axis of the external flushing hole and the vertical direction is 45 degrees. The internal flushing pipe and the external flushing pipe are both connected to the external water supply pipeline, and switch valves are installed on the external flushing pipe and the internal flushing pipe.

2. A gravity porous pipe mud discharge system for a waterworks sedimentation tank according to claim 1, characterized in that: The spacing between the holes on the mud discharge pipe in the sedimentation tank close to the valve end is 350mm, and the spacing between the holes away from the valve end is 300mm. The mud discharge pipe adopts DN200, the internal flushing pipe adopts DN40, and the external flushing pipe adopts DN50.

3. A gravity porous pipe mud discharge system for a waterworks sedimentation tank according to claim 1, characterized in that: The external flushing pipe is located under the bracket.

4. A gravity porous pipe mud discharge system for a waterworks sedimentation tank according to claim 1, characterized in that: An exhaust valve is also installed on the water supply pipeline of the external flushing pipe outside the sedimentation tank.

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