Double-wall spiral noise reduction sand washing and separating system

Abstract

The invention discloses a double-wall spiral noise reduction sand washing and separating system which comprises an efficient grit chamber, a sand discharge pump, a sand washing and separating all-in-one machine, a water tank, a backwashing water pump and a system pipeline, multiple groups of first triangular convex spiral ribs are arranged on multiple groups of discs arranged in the efficient grit chamber and the sand washing and separating all-in-one machine, and multiple groups of first triangular convex spiral ribs are arranged. The system pipeline comprises transverse pipes, vertical pipes and elbows, the adjacent transverse pipes and vertical pipes are connected through the elbows, each vertical pipe is of a double-wall structure, and multiple sets of second triangular convex spiral ribs are arranged on the inner wall of each vertical pipe. According to the scheme, through the triangular convex spiral ribs in the disc and the vertical pipe, water flow is guided to flow spirally, collision is reduced, noise and equipment abrasion are reduced, the sand-water separation efficiency is improved, and sand grains are prevented from being taken away too fast; the design of the double-wall vertical pipe and the silencing cavity enhances sound insulation, and operation noise is greatly reduced; the micro sand setting filter is used for filtering through the cylindrical part and the conical part and is matched with the screw rod for dredging, so that the sand recovery rate is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of sand washing and separation, and more particularly to a double-wall spiral sound-absorbing sand washing and separation system. BACKGROUND

[0002] The sand washing and separation system in a sewage treatment plant is a key device for removing sand particles and fine particulate matter in sewage and performing graded recovery, aiming to improve sewage treatment efficiency, protect subsequent treatment unit devices, and realize resource recovery.

[0003] Currently, traditional sand washing and separation is achieved by increasing the high-speed collision between sand bodies in sewage through a stirrer to adsorb organic matter in water for sedimentation and sliding, or by using multiple interval-set separation discs to guide water flow into the separation disc through the guide plate on the separation disc, and after the water flow is guided in, it enters along the conical guide plate, is separated in a spiral shape, and after separation, the water flow overflows from the bottom to the top and is finally guided out from the top, while the solid sand material is guided out from the bottom. It is a multi-layer hydrocyclone solid-liquid separator that forms a sedimentation interface on the smooth inner surface of the disc through hydrocyclone, has high separation efficiency, and the solid sediment can be discharged through the bottom to avoid sand accumulation in the sand collecting hopper causing blockage.

[0004] In the above two traditional methods, the first sand washing and separation effect is general, and the second sand washing and separation effect is only 60% because the slope of the disc is large and the sand bodies in the sewage are not given enough time to slide and are taken away by the water flow. Moreover, the conventional sand washing and separation system does not have sound insulation function, and the noise is very loud. After the disc is separated, there is still some sand in the water overflowing from the top of the disc, and the existing method directly discharges the overflowed water source through the pipeline system, lacking a filtering system. SUMMARY

[0005] The present application aims to provide a double-wall spiral sound-absorbing sand washing and separation system to solve the technical problems existing in the background art.

[0006] The technical scheme of the present application provides a double-wall spiral sound-attenuating sand washing and separating system, which comprises an efficient sand settling tank, a sand discharging pump, a sand washing and separating all-in-one machine, a water tank, a backwashing water pump and system pipelines, the sand discharging hopper discharge port at the bottom of the efficient sand settling tank is connected to the input end of the sand discharging pump through the system pipelines, the output end of the sand discharging pump is connected to the input end of the sand washing and separating all-in-one machine through the system pipelines, the input end of the backwashing water pump is connected to the water drain pipe of the water tank, the output end of the backwashing water pump is connected to the backwashing pipes of the efficient sand settling tank and the sand washing and separating all-in-one machine, the first triangular convex spiral ribs are arranged on the multiple groups of disc plates arranged inside the efficient sand settling tank and the sand washing and separating all-in-one machine, the first triangular convex spiral ribs are arranged in multiple groups, the system pipelines comprise horizontal pipes, vertical pipes and elbows, the adjacent horizontal pipes and vertical pipes are connected through the elbows, the vertical pipe is of a double-wall structure, the second triangular convex spiral ribs are arranged on the inner wall of the vertical pipe, and the second triangular convex spiral ribs are arranged in multiple groups.

[0007] In a preferred embodiment, the vertical pipe comprises a vertical outer pipe, a vertical inner pipe and a micro sand settling filter, the vertical inner pipe is arranged inside the vertical outer pipe, and the vertical outer pipe and the vertical inner pipe are arranged concentrically, and the lower end of the vertical pipe is provided with the micro sand settling filter.

[0008] In a preferred embodiment, connecting beads are arranged between the inner wall of the vertical outer pipe and the outer wall of the vertical inner pipe, the connecting beads are arranged in multiple groups, and the multiple groups of connecting beads divide the cavity between the vertical outer pipe and the vertical inner pipe into multiple sound-attenuating cavities.

[0009] In a preferred embodiment, the micro sand settling filter comprises a filter cavity, a filter screen structure arranged in the filter cavity and a dredging structure arranged in the filter screen structure, and the filter cavity is connected with an outlet one and an outlet two.

[0010] In a preferred embodiment, the filter screen structure comprises a cylindrical portion on the upper side and a conical portion on the lower side, the cylindrical portion is connected to the conical portion, and the conical portion is connected to the outlet two.

[0011] In a preferred embodiment, the dredging structure comprises a driving motor and a spiral rod connected to the output end of the driving motor, and the spiral rod extends into the outlet two.

[0012] In a preferred embodiment, the first triangular convex spiral ribs are arranged in a straight line and obliquely on the inner wall of the disc plate, and the included angle between the first triangular convex spiral ribs and the center line of the disc plate is 8°-20°.

[0013] In a preferred embodiment,

[0014] The second triangular convex spiral ribs are arranged in a straight line and obliquely on the inner wall of the vertical inner pipe, and the included angle between the second triangular convex spiral ribs and the center line of the vertical inner pipe is 8°-20°.

[0015] In a preferred embodiment, the high-efficiency grit chamber and sand washing and separating integrated machine is provided with at least two groups;

[0016] The sand discharge pump is provided with at least three groups, and three input ends of the three groups of sand discharge pumps are connected to the sand discharge hopper discharge ports at the bottoms of the two groups of high-efficiency grit chambers through system pipelines, and three output ends of the three groups of sand discharge pumps are connected to the input ends of the two groups of sand washing and separating integrated machines through system pipelines.

[0017] The technical scheme of the present application has the following beneficial effects:

[0018] The disc and the triangular convex spiral rib in the standpipe guide the spiral flow of the water flow, reduce the collision, reduce the noise and equipment wear, improve the sand-water separation efficiency, and avoid that the sand particles are taken away too fast; the double-wall standpipe and the sound-absorbing cavity design enhance the sound insulation and greatly reduce the operation noise; the miniature grit filter is filtered through the cylindrical part and the conical part, cooperates with the spiral rod dredging, improves the sand particle recovery rate, prevents blockage, and guarantees the stable filtration. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The present application is a whole schematic diagram,

[0020] Figure 2 The present application is a disc schematic diagram,

[0021] Figure 3 The present application is a pipeline system schematic diagram,

[0022] Figure 4 The present application is a pipeline system sectional view.

[0023] BRIEF DESCRIPTION OF DRAWINGS: BRIEF DESCRIPTION OF DRAWINGS: 1 high-efficiency grit chamber, 2 sand discharge pump, 3 sand washing and separating integrated machine, 4 water tank, 5 backwashing water pump, 6 disc, 7 first triangular convex spiral rib; 8 cross pipe; 9 standpipe, 901 vertical outer pipe, 902 vertical inner pipe, 903 miniature grit filter, 9031 filter cavity, 9032 outlet one, 9033 outlet two, 9034 cylindrical part, 9035 conical part, 9036 driving motor, 9037 spiral rod, 904 connecting lug; 10 elbow; 11 second triangular convex spiral rib. DETAILED DESCRIPTION

[0024] The present application will be further described in detail below, and the embodiments of the present application are given for the convenience of illustration and description, and are not exhaustive or limit the present application to the disclosed forms. Many modifications and changes will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical application of the present application, and to enable those of ordinary skill in the art to understand the present application so as to design various embodiments with various modifications suitable for specific purposes.

[0025] AsFigure 1 As shown, the technical scheme of the present application provides a multi-layer sand washing and separating system, which comprises an efficient sand settling tank 1, a sand discharge pump 2, a sand washing and separating all-in-one machine 3, a water tank 4 and a backwashing water pump 5. The sand discharge outlet of the sand settling hopper at the bottom of the efficient sand settling tank 1 is connected to the input end of the sand discharge pump 2 through a system pipeline. The output end of the sand discharge pump 2 is connected to the input end of the sand washing and separating all-in-one machine 3 through a system pipeline. The input end of the backwashing water pump 5 is connected to the drain pipe of the water tank 4. The output end of the backwashing water pump 5 is connected to the backwashing pipes of the efficient sand settling tank 1 and the sand washing and separating all-in-one machine 3. The efficient sand settling tank 1 and the sand washing and separating all-in-one machine 3 are provided with at least two groups. The sand discharge pump 2 is provided with at least three groups. The three input ends of the three groups of sand discharge pumps 2 are connected to the sand discharge outlets of the sand settling hoppers at the bottom of the two groups of efficient sand settling tanks 1 through system pipelines. The three output ends of the three groups of sand discharge pumps 2 are connected to the input ends of the two groups of sand washing and separating all-in-one machines 3 through system pipelines.

[0026] In the above scheme, sewage flows into the efficient sand settling tank 1 from the upstream tank through a channel. After being treated inside the efficient sand settling tank 1, the sewage is settled into the sand settling hopper at the bottom. Then, the sand discharge pump 2 sucks and transports the sand-water mixture to the sand washing and separating all-in-one machine 3. In the present application, three sand discharge pumps 2 are used. One sand discharge pump 2 is used for one group of efficient sand settling tanks 1 and one group of sand washing and separating all-in-one machines 3. The other sand discharge pump 2 is used as a backup. The sand discharge pump 2 in the present application is a dry sand discharge pump 2, which can be installed on the top of the tank and does not need to be installed in the sand settling hopper at the bottom of the equipment. Therefore, maintenance and replacement are simple and the pump is not easy to be blocked.

[0027] In the sand washing and separating all-in-one machine 3, the sand-water mixture sucked and transported by the sand discharge pump 2 enters in the tangential direction. Under the action of high-speed rotational flow, the sand-water mixture is rubbed with each other. The design of the spiral pipe plays a role in guiding the water flow, so that the water flow falls along the tangential water flow in a spiral manner. In the present application, the sand washing and separating all-in-one machine 3 is composed of a sand washer, a sand separator and a spiral conveyor. The sand washer washes sand, the sand separator separates sand, and finally the sand is collected into a collection barrel by the spiral conveyor. The supernatant in the sand washing and separating process is discharged by overflow from the top of the sand washing and separating all-in-one machine 3. When backwashing the efficient sand settling tank 1 and the sand washing and separating all-in-one machine 3, the water tank 4 is connected to the plant area recycled water or plant area water supply (recycled water is used if there is recycled water, and tap water is used if there is no recycled water). The backwashing water in the water tank 4 is pumped into the sand washing and separating all-in-one machine 3 by the backwashing water pump 5 to backwash the sand washer, the sand separator and the spiral conveyor which constitute the sand washing and separating all-in-one machine 3. At the same time, the backwashing water also enters the efficient sand settling tank 1 to backwash the equipment in the efficient sand settling tank 1. In the present application, the three groups of backwashing water pumps 5 are the same as the three groups of sand discharge pumps 2. One of them is a backup flushing pump.

[0028] As Figures 2-4As shown, the high-efficiency grit chamber 1 is provided with a first triangular convex spiral rib 7 on each of the plurality of groups of disc plates 6 arranged inside the sand washing and separating all-in-one machine 3, the first triangular convex spiral rib 7 is provided in multiple groups, the system pipeline includes a horizontal pipe 8, a vertical pipe 9 and an elbow 10, adjacent horizontal pipes 8 and vertical pipes 9 are connected through the elbow 10, the vertical pipe 9 is of a double-wall structure, and a second triangular convex spiral rib 11 is arranged on the inner wall of the vertical pipe 9, the second triangular convex spiral rib 11 is provided in multiple groups.

[0029] In the above scheme, the first triangular convex spiral rib 7 can guide the water flow in the disc plate 6 to form a spiral flow in a tangent direction, thereby enhancing the mutual scrubbing action of the sand-water mixture in the cyclone, promoting the separation of sand particles and water, and the second triangular convex spiral rib 11 guides the water flow in the vertical pipe 9 to fall spirally, thereby avoiding the collision of multi-directional water flow to form a turbulent flow. Further, the noise generated by the collision of water flow is reduced, the impact and wear of the water flow on the disc plate 6 and the pipeline are reduced, the sand-water separation efficiency is improved, and the sand particles are prevented from being carried away too quickly by the water flow.

[0030] The vertical pipe 9 includes a vertical outer pipe 901, a vertical inner pipe 902 and a micro grit settling filter 903, the vertical inner pipe 902 is arranged inside the vertical outer pipe 901, the vertical outer pipe 901 and the vertical inner pipe 902 are arranged concentrically, and the lower end of the vertical pipe 9 is provided with the micro grit settling filter 903. The vertical outer pipe 901 and the vertical inner pipe 902 form a double-wall structure, and the air layer and the cavity are used to block the propagation of noise; the micro grit settling filter 903 performs secondary filtration on the water flowing through the vertical pipe 9, and traps fine sand particles that have not been separated. The double-wall structure enhances the sound insulation effect of the system, and reduces the operating noise; the micro grit settling filter 903 improves the sand particle recovery efficiency, reduces the waste of sand and stone resources, and avoids pollution caused by direct discharge of fine sand particles

[0031] A connecting rib 904 is arranged between the inner wall of the vertical outer pipe 901 and the outer wall of the vertical inner pipe 902, the connecting rib 904 is provided in multiple groups, and the multiple groups of connecting ribs 904 divide the cavity between the vertical outer pipe 901 and the vertical inner pipe 902 into multiple sound absorption cavities. The multiple independent sound absorption cavities can absorb the noise generated by the impact of water flow on the pipeline through sound wave reflection, interference and damping action, and reduce the noise propagation efficiency.

[0032] The micro grit settling filter 903 includes a filter cavity 9031, a filter screen structure arranged in the filter cavity 9031 and a dredging structure located in the filter screen structure, and the filter cavity 9031 is communicated with an outlet one 9032 and an outlet two 9033. The filter screen structure includes a cylindrical portion 9034 on the upper side and a conical portion 9035 on the lower side, the cylindrical portion 9034 and the conical portion 9035 are connected, and the conical portion 9035 is connected with the outlet two 9033. The dredging structure includes a driving motor 9036 and a screw rod 9037 connected with the output end of the driving motor 9036, and the screw rod 9037 extends into the outlet two 9033.

[0033] The cylindrical part 9034 of the filter screen structure in the above scheme performs preliminary filtration on the water flow, retaining larger sand particles; the conical part 9035 guides the filtered sand particles to gather towards the second outlet 9033; the spiral rod 9037 of the dredging structure rotates under the drive of the motor 9036, pushing the sand particles out through the second outlet 9033, while preventing the filter screen from being blocked. The above scheme can improve the filtration efficiency and avoid the influence of filter screen blockage on system operation; the dredging effect of the spiral rod 9037 ensures continuous and stable filtration, the recovered sand particles can re-enter the sand separation system, improving resource utilization, and the filtered water discharged from the first outlet 9032 is cleaner, reducing the subsequent processing burden.

[0034] The first triangular convex spiral rib 7 is linearly and obliquely distributed on the inner wall of the disc 6, and the included angle between the first triangular convex spiral rib 7 and the center line of the disc 6 is 8°-20°. The second triangular convex spiral rib 11 is linearly and obliquely distributed on the inner wall of the vertical inner tube 902, and the included angle between the second triangular convex spiral rib 11 and the center line of the vertical inner tube 902 is 8°-20°.

[0035] The included angle of 8°-20° enables the spiral rib to efficiently guide the water flow to form a stable spiral flow field, which not only ensures that the water flow has sufficient rotational flow velocity to promote sand particle settlement, but also avoids excessive flow velocity that prevents sand particles from adhering and settling. Optimizing the water flow state, balancing the rotational flow intensity and settling time, and improving the sand-water separation efficiency (solving the problem of traditional disc 6 that the sand particles cannot slide down due to large slope).

[0036] The triangular convex spiral ribs in the disc 6 and the vertical pipe 9 guide the water flow to spiral flow, reduce collision, reduce noise and equipment wear, improve sand-water separation efficiency, and prevent sand particles from being carried away too quickly; the double-wall vertical pipe 9 and the sound-absorbing cavity design enhance sound insulation, significantly reducing operating noise; the miniature sand settling filter 903 is filtered through the cylindrical part 9034 and the conical part 9035, and cooperates with the spiral rod 9037 to dredge, improve the sand particle recovery rate, prevent blockage, and ensure stable filtration.

[0037] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the scope of protection of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A double-wall spiral sound-damping sand washing and separating system, comprising a high-efficiency sand settling tank, a sand discharge pump, a sand washing and separating all-in-one machine, a water tank, a backwashing water pump and system pipelines, a sand settling tank hopper discharge port at the bottom of the high-efficiency sand settling tank is connected to the input end of the sand discharge pump through the system pipelines, the output end of the sand discharge pump is connected to the input end of the sand washing and separating all-in-one machine through the system pipelines, the input end of the backwashing water pump is connected to the water discharge pipe of the water tank, and the output end of the backwashing water pump is connected to the backwashing pipes of the high-efficiency sand settling tank and the sand washing and separating all-in-one machine, characterized in that: The first triangular convex spiral ribs are arranged on the inner wall of the disc plate, and the first triangular convex spiral ribs are arranged in a straight line and are inclined and uniformly distributed on the inner wall of the disc plate. ​ 2. A double-wall spiral sound-damping sand washing and classifying system according to claim 1, characterized in that: The vertical pipe includes a vertical outer pipe, a vertical inner pipe and a micro sand setting filter.

3. A double-walled spiral sound-attenuating sand washing and classifying system according to claim 2, characterized in that: The vertical outer pipe is internally provided with the vertical inner pipe, and the vertical outer pipe and the vertical inner pipe are concentrically arranged.

4. The double-wall spiral sound-attenuating sand washing and classifying system according to claim 2, characterized in that: The connecting beads are arranged between the inner wall of the vertical outer pipe and the outer wall of the vertical inner pipe, and the connecting beads are arranged in multiple groups.

5. A double-walled spiral sound-attenuating sand washing and classifying system according to claim 4, characterized in that: The micro sand setting filter includes a filter cavity, a filter screen structure arranged in the filter cavity and a dredging structure arranged in the filter screen structure.

6. A double-walled spiral sound-attenuating sand washing and classifying system according to claim 4, characterized in that: The filter screen structure includes a cylindrical portion on the upper side and a conical portion on the lower side.

7. The double-walled spiral sound-attenuating sand washing and classifying system according to claim 1, characterized in that: The dredging structure includes a driving motor and a spiral rod connected with the output end of the driving motor. The first triangular convex spiral ribs are arranged in a straight line and are inclined and uniformly distributed on the inner wall of the disc plate.

8. The double-wall spiral sound-absorbing sand washing and separating system according to claim 1, characterized in that:

9. The double-walled spiral sound-attenuating sand washing and classifying system according to claim 1, characterized in that: The second triangular convex spiral ribs are arranged in a straight line and are inclined and uniformly distributed on the inner wall of the vertical inner pipe. The high-efficiency sand setting pool and the sand washing and separating integrated machine are provided with at least two groups. The sand discharge pump is provided with at least three groups, and the three input ends of the three groups of sand discharge pumps are connected with the sand setting hoppers of the two groups of high-efficiency sand setting pools through the system pipeline. The three output ends of the three groups of sand discharge pumps are connected with the input ends of the two groups of sand washing and separating integrated machines through the system pipeline.

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