A multi-layer sand washing and separating system

Abstract

The utility model discloses a kind of multi-layer sand washing and sand separating systems, including efficient sand trap, sand pump, sand washing and sand separating all-in-one machine, water tank and backwash water pump, efficient sand trap and sand washing and sand separating all-in-one machine inside are all set with multiple groups of disc, and flush device is set on disc;Flush device includes liquid supply component and the flush component of detachable connection with several liquid supply, flush component and disc one-to-one correspondence, flush component includes the two groups of semicircular flush pipe of being located above disc and being symmetrically arranged and the connecting piece of connecting two groups of semicircular flush pipe, and flush pipe head is bent on semicircular flush pipe and is set with interval.This scheme uses multiple efficient sand trap, sand washing and sand separating all-in-one machine cooperates three groups of sand pump, including spare pump, and guarantees continuous operation.Dry sand pump is installed conveniently, and it is simple to overhaul and replace and not easy to block.Flush device is designed ingeniously, gas-liquid mixing enhances scouring force, symmetric semicircular flush pipe cooperates tangential flush head, no dead angle and does not disturb water flow.

Description

Technical Field

[0001] This utility model relates to the field of sand washing and separation, and more specifically, to a multi-layer sand washing and separation system. Background Technology

[0002] The sand washing and separation system in a wastewater treatment plant is a key piece of equipment used to remove sand and fine particulate matter from wastewater and to classify and recycle them. It aims to improve wastewater treatment efficiency, protect downstream treatment equipment, and achieve resource recovery.

[0003] Currently, traditional sand washing and separation methods use agitators to increase high-speed collisions between sand particles in wastewater, thereby adsorbing organic matter in the water and causing it to settle and slide off. Alternatively, multiple spaced-apart separation discs are used, with guide plates on the discs guiding the water flow. After being introduced, the water flows along the conical guide plate, forming a spiral separation. After separation, the water overflows from the bottom to the top and is finally discharged from the top, while the solid sand is discharged from the bottom. This is a multi-layer cyclone solid-liquid separator. Through hydraulic cyclone, a settling interface is formed on the smooth inner surface of the discs, resulting in high separation efficiency. Furthermore, the solid sediment can be discharged from the bottom, avoiding sand accumulation and blockage in the sand collection hopper.

[0004] For example, in one of the two traditional methods disclosed in Patent No. 202420739921.9, a multi-layer vortex grit chamber flushing device places the flushing pipe above the discs to flush the disc surface, thus solving the problem that existing multi-layer vortex grit chambers easily accumulate sand and silt on the disc surface when the influent load rate is low, affecting the sand separation effect. However, because the discs are arranged in multiple layers, the space between adjacent discs is limited, making it difficult to disassemble and assemble the flushing pipe. Placing it above the discs also interferes with the water flow direction during sand separation, which is not conducive to the centrifugal movement of sand and water. Utility Model Content

[0005] The purpose of this invention is to provide a multi-layer sand washing and separating system to solve the technical problems existing in the background art.

[0006] This utility model provides a multi-layer sand washing and separating system, including a high-efficiency sedimentation tank, a sand discharge pump, an integrated sand washing and separating machine, a water tank, and a backwash water pump. The discharge port of the sedimentation hopper at the bottom of the high-efficiency sedimentation tank is connected to the input end of the sand discharge pump through a system pipeline. The output end of the sand discharge pump is connected to the input end of the integrated sand washing and separating machine through a system pipeline. The input end of the backwash water pump is connected to the drain pipe of the water tank. The output end of the backwash water pump is connected to the backwash pipes of the high-efficiency sedimentation tank and the integrated sand washing and separating machine. Multiple sets of discs are installed inside the high-efficiency sedimentation tank and the integrated sand washing and separating machine, and flushing devices are installed on the discs.

[0007] The rinsing device includes a liquid supply assembly and several rinsing components detachably connected to the liquid supply assembly. Each rinsing component corresponds to a disc. Each rinsing component includes two sets of semi-circular rinsing pipes located above the disc and arranged symmetrically, and a connector connecting the two sets of semi-circular rinsing pipes. Rinse pipe heads with bends are spaced apart on the semi-circular rinsing pipes. The high-pressure water sprayed from the rinsing pipe heads moves tangentially within the disc.

[0008] In a preferred embodiment, the outlet end of the flushing nozzle has a wedge-shaped structure.

[0009] In a preferred embodiment, the connector includes a connecting sleeve, and both sets of semi-circular flushing pipes are inserted and fixed into the connecting sleeve.

[0010] In a preferred embodiment, a support base is also provided above the disc, and the support base is provided with an arc-shaped limiting groove, through which the semi-circular rinsing pipe is supported.

[0011] In a preferred embodiment, the liquid supply assembly includes a liquid supply pipe and a gas-liquid mixer disposed on the liquid supply pipe. The gas-liquid mixer is provided with a gas supply assembly, and the gas and liquid are mixed in the gas-liquid mixer.

[0012] In a preferred embodiment, the gas supply assembly includes a gas supply pipe connected to an external gas delivery device and a gas distribution ring located inside the gas-liquid mixer, with a plurality of gas outlets spaced apart on the gas distribution ring.

[0013] In a preferred embodiment, at least two sets of high-efficiency sedimentation tanks and integrated sand washing and separating machines are provided;

[0014] There are at least three sets of sand discharge pumps. The three input ends of the three sets of sand discharge pumps are connected to the discharge ports of the sedimentation hoppers at the bottom of the two sets of high-efficiency sedimentation tanks through system pipelines. The three output ends of the three sets of sand discharge pumps are connected to the input ends of the two sets of integrated sand washing and separating machines through system pipelines.

[0015] The beneficial effects of this utility model's technical solution are:

[0016] This solution employs multiple sets of high-efficiency sedimentation tanks, an integrated sand washing and separating machine, and three sets of sand discharge pumps, including a backup pump, to ensure continuous operation. The dry sand discharge pumps are easy to install, maintain, and replace, and are not prone to clogging. The flushing device is ingeniously designed; gas-liquid mixing enhances the flushing force, and the symmetrical semi-circular flushing pipes combined with tangential flushing heads eliminate dead angles and do not interfere with water flow. Wedge-shaped pipe heads expand the coverage area, the plug-in structure facilitates maintenance, and the support base ensures stability. Overall, this solution improves sand washing and separating efficiency, extends equipment lifespan, and reduces maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0018] Figure 2This is a schematic diagram of the rinsing device and disc of this utility model.

[0019] Figure 3 This is a schematic diagram of the overall flushing device of this utility model.

[0020] Explanation of reference numerals in the attached diagram: 1 High-efficiency sedimentation tank, 2 Sand discharge pump, 3 Sand washing and separating integrated machine, 4 Water tank, 5 Backwash water pump, 6 Disc, 7 Water inlet, 8 Liquid supply assembly, 9 Flushing assembly, 10 Liquid supply pipe, 11 Gas-liquid mixer, 12 Air supply pipe, 13 Air distribution ring, 14 Air outlet, 15 Semi-circular flushing pipe, 16 Flushing pipe head, 17 Connecting sleeve, 18 Support base. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical applications of the present invention, and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for a particular purpose.

[0022] like Figure 1 As shown, this utility model provides a multi-layer sand washing and separating system, including a high-efficiency sedimentation tank 1, a sand discharge pump 2, a sand washing and separating integrated machine 3, a water tank 4, and a backwash water pump 5. The discharge port of the sedimentation hopper at the bottom of the high-efficiency sedimentation 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 integrated machine 3 through a system pipeline. The input end of the backwash water pump 5 is connected to the drain pipe of the water tank 4, and the output end of the backwash water pump 5 is connected to the backwash pipes of the high-efficiency sedimentation tank 1 and the sand washing and separating integrated machine 3. At least two sets of high-efficiency sedimentation tanks 1 and sand washing and separating integrated machines 3 are provided; at least three sets of sand discharge pumps 2 are provided. The three input ends of the three sets of sand discharge pumps 2 are connected to the discharge ports of the sedimentation hoppers at the bottom of two sets of high-efficiency sedimentation tanks 1 through system pipelines, and the three output ends of the three sets of sand discharge pumps 2 are connected to the input ends of the two sets of sand washing and separating integrated machines 3 through system pipelines.

[0023] In the above scheme, sewage flows from the upstream pool into the high-efficiency grit chamber 1 through a channel. After being treated inside the high-efficiency grit chamber 1, it settles into the bottom grit hopper, and then is pumped by the sand discharge pump 2 and transported to the integrated sand washing and separating machine 3. This utility model has three sand discharge pumps 2. One sand discharge pump 2 is used for one set of high-efficiency grit chamber 1 and one set of integrated sand washing and separating machine 3, and the other sand discharge pump 2 is on standby. The sand discharge pump 2 in this scheme is a dry sand discharge pump 2, which can be installed on the top of the pool and does not need to be installed in the bottom grit hopper of the equipment. It is simple to inspect and replace and is not easy to clog.

[0024] In the integrated sand washing and separating machine 3, the sand-water mixture pumped and transported by the sand discharge pump 2 enters tangentially. Under the action of high-speed swirling flow, the sand and water wash each other, and the spiral pipe design guides the water flow, causing the water to fall spirally along the tangential flow. In this scheme, the integrated sand washing and separating machine 3 consists of a sand washing machine, a sand separating machine, and a spiral conveyor. The sand washing machine washes the sand, the sand separating machine separates the sand, and finally the sand is collected by the spiral conveyor into a collection tank. The supernatant from the sand washing and separating process overflows and is discharged from the top of the integrated sand washing and separating machine 3. When backwashing the high-efficiency sedimentation tank 1 and the integrated sand washing and separating machine 3, the water tank 4 is connected to the plant's recycled water or plant's water supply (recycled water is used if there is recycled water, and tap water is used if there is no recycled water). The backwash water in the water tank 4 is pumped into the integrated sand washing and separating machine 3 through the backwash water pump 5, and the sand washing machine, sand separating machine and screw conveyor that make up the integrated sand washing and separating machine 3 are backwashed respectively. At the same time, the backwash water also enters the high-efficiency sedimentation tank 1 to backwash the equipment in the high-efficiency sedimentation tank 1. In this utility model, the three sets of backwash water pumps 5 are the same as the three sets of sand discharge pumps 2, one of which is a standby flushing pump.

[0025] like Figure 2-3 As shown, both the high-efficiency grit chamber 1 and the integrated sand washing and separating machine 3 are equipped with multiple sets of discs 6, each with a rinsing device. The rinsing device includes a liquid supply component 8 and several rinsing components 9 detachably connected to the liquid supply component. Each rinsing component 9 corresponds to one disc 6. The liquid supply component 8 provides the rinsing medium, which is precisely delivered to the corresponding disc 6 surface via the rinsing components 9, achieving targeted rinsing of each disc 6 and preventing sand particles from adhering to the disc 6 and affecting processing efficiency.

[0026] The liquid supply assembly 8 includes a liquid supply pipe 10 and a gas-liquid mixer 11 disposed on the liquid supply pipe 10. A gas supply assembly is disposed inside the gas-liquid mixer 11, and gas and liquid are mixed in the gas-liquid mixer 11. The gas supply assembly includes a gas supply pipe 12 connected to an external gas transmission device and a gas distribution ring 13 located inside the gas-liquid mixer 11. A plurality of gas outlets 14 are disposed at intervals on the gas distribution ring 13.

[0027] Liquid supply pipe 10 delivers liquid, and air supply pipe 12 introduces external gas into air distribution ring 13. Air distribution ring 13 evenly disperses the gas into air-liquid mixer 11 through multiple air outlets 14, allowing the gas and liquid to mix thoroughly to form an air-liquid mixture, enhancing the impact force of the rinsing medium. After air-liquid mixing, the rinsing pressure and scouring force are significantly increased, improving the removal effect on sand particles on the surface of disc 6. The air outlets 14 of air distribution ring 13 are spaced apart to ensure uniform gas distribution, avoid differences in rinsing effect caused by uneven local mixing, and improve overall rinsing stability.

[0028] The rinsing assembly 9 includes two sets of semi-circular rinsing pipes 15 located above the disc 6 and symmetrically arranged, and a connector connecting the two sets of semi-circular rinsing pipes 15. The semi-circular rinsing pipes 15 are spaced apart with rinsing pipe heads 16, and the high-pressure water sprayed from the rinsing pipe heads 16 moves tangentially within the disc 6.

[0029] After the liquid mixture is delivered to the flushing assembly 9 via the liquid supply component 8, it covers the entire circumference of the disc 6 through two sets of symmetrical semi-circular flushing pipes 15. The bent flushing pipe heads 16 cause the ejected high-pressure gas-liquid mixture to move tangentially along the disc 6, creating a rotating flushing effect to thoroughly remove sand particles adhering to the surface of the disc 6. The symmetrical semi-circular flushing pipe design 15 ensures that there are no blind spots in the flushing of the disc 6; the tangentially moving high-pressure medium can utilize centrifugal force to enhance the flushing force, improve the sand removal efficiency, and reduce the consumption of flushing medium. Furthermore, the above configuration facilitates the disassembly and installation of the flushing assembly 9, making subsequent maintenance simpler.

[0030] The outlet end of the flushing head 16 has a wedge-shaped structure. The wedge-shaped structure causes the gas-liquid mixture to form a flat water flow when it is ejected, which expands the flushing coverage area of ​​a single medium and enhances the shear force of the water flow on the surface of the disc 6.

[0031] The connector includes a connecting sleeve 17, with both sets of semi-circular flushing pipes 15 inserted and fixed into the connecting sleeve 17. The insertion and fixing method simplifies the installation and disassembly process of the flushing assembly 9, making daily maintenance and component replacement easier; the flexible combination design allows the flushing assembly 9 to be adapted to different sizes of discs 6, improving the versatility of the equipment.

[0032] A support base 18 is also provided above the disc 6. The support base 18 has an arc-shaped limiting groove, and the semi-circular flushing pipe 15 is supported by the support base 18. The wedge-shaped structure causes the gas-liquid mixture to form a flat water flow when it is sprayed out, which expands the flushing coverage area of ​​a single medium and enhances the shearing force of the water flow on the surface of the disc 6. The arc-shaped limiting groove of the support base 18 matches the shape of the semi-circular flushing pipe 15, which can accurately fix the position of the flushing pipe and prevent the flushing pipe from shifting or shaking due to the impact force of the medium during the flushing process.

[0033] This solution employs multiple sets of high-efficiency sedimentation tanks 1, an integrated sand washing and separating machine 3, and three sets of sand discharge pumps 2, including a backup pump, to ensure continuous operation. The dry sand discharge pumps 2 are easy to install, maintain, and replace, and are not prone to clogging. The flushing device is ingeniously designed; gas-liquid mixing enhances the flushing force, and the symmetrical semi-circular flushing pipes 15, combined with tangential flushing heads 16, eliminate dead angles and do not interfere with water flow. The wedge-shaped pipe head expands the coverage area, the plug-in structure facilitates maintenance, and the support base 18 ensures stability. Overall, this solution improves sand washing and separating efficiency and extends equipment lifespan while reducing maintenance costs.

[0034] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A multi-layer sand washing and separating system, comprising a high-efficiency sedimentation tank, a sand discharge pump, an integrated sand washing and separating machine, a water tank, and a backwash water pump, wherein the discharge port of the sedimentation hopper at the bottom of the high-efficiency sedimentation tank is connected to the input end of the sand discharge pump through a system pipeline, the output end of the sand discharge pump is connected to the input end of the integrated sand washing and separating machine through a system pipeline, the input end of the backwash water pump is connected to the drain pipe of the water tank, and the output end of the backwash water pump is connected to the backwash pipes of the high-efficiency sedimentation tank and the integrated sand washing and separating machine, characterized in that: The high-efficiency sedimentation tank and sand washing and separating integrated machine are equipped with multiple sets of discs, and the discs are equipped with rinsing devices. The rinsing device includes a liquid supply assembly and several rinsing components detachably connected to the liquid supply assembly. Each rinsing component corresponds to a disc. Each rinsing component includes two sets of semi-circular rinsing pipes located above the disc and arranged symmetrically, and a connector connecting the two sets of semi-circular rinsing pipes. Rinse pipe heads with bends are spaced apart on the semi-circular rinsing pipes. The high-pressure water sprayed from the rinsing pipe heads moves tangentially within the disc.

2. The multi-layer sand washing and separating system according to claim 1, characterized in that: The outlet end of the flushing pipe head has a wedge-shaped structure.

3. The multi-layer sand washing and separating system according to claim 1, characterized in that: The connector includes a connecting sleeve, and both sets of semi-circular flushing pipes are inserted and fixed into the connecting sleeve.

4. The multi-layer sand washing and separating system according to claim 1, characterized in that: A support base is also provided above the disc, and the support base is provided with an arc-shaped limiting groove, through which the semi-circular rinsing pipe is supported.

5. A multi-layer sand washing and separating system according to claim 1, characterized in that: The liquid supply assembly includes a liquid supply pipe and a gas-liquid mixer installed on the liquid supply pipe. The gas-liquid mixer contains a gas supply assembly, and the gas and liquid are mixed in the gas-liquid mixer.

6. A multi-layer sand washing and separating system according to claim 5, characterized in that: The gas supply assembly includes a gas supply pipe that connects to an external gas transmission device and a gas distribution ring located inside the gas-liquid mixer. The gas distribution ring has several gas outlets spaced apart.

7. A multi-layer sand washing and separating system according to claim 1, characterized in that: At least two sets of high-efficiency sedimentation tanks and integrated sand washing and separating machines are required; There are at least three sets of sand discharge pumps. The three input ends of the three sets of sand discharge pumps are connected to the discharge ports of the sedimentation hoppers at the bottom of the two sets of high-efficiency sedimentation tanks through system pipelines. The three output ends of the three sets of sand discharge pumps are connected to the input ends of the two sets of integrated sand washing and separating machines through system pipelines.

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