A siphon type backwater device for a tailings pond

Abstract

This utility model belongs to the field of tailings dam water treatment technology, and particularly relates to a tailings dam siphon-type return water device. A roller is fixed to the overflow tower frame of the tailings dam, and a siphon pipe is placed on the roller. The siphon pipe has a U-shaped structure, divided into an upstream section and a downstream section, with the upstream section being shorter than the downstream section. The upstream section of the siphon pipe is connected to a return water pump, the pump's head being adapted to the height of the highest point of the siphon pipe and slightly greater than its elevation. The return water pump is connected to the top of an inlet pipe, the bottom of which extends 1 meter below the water surface of the tailings dam. A slag-straining screen is installed at the inlet port. The downstream section extends into the tailings dam overflow tower, with its opening lower than the inlet port. The downstream end of the siphon pipe is connected to an outlet pipe. A pressure relief valve is installed on the upstream section of the siphon pipe near the return water pump. This device has a simple structure, low manufacturing and maintenance costs, requires no external continuous power, and efficiently discharges tailings dam water, preventing tailings overflow and environmental pollution.

Description

Technical Field

[0001] This utility model belongs to the field of tailings dam water treatment technology, and in particular relates to a tailings dam siphon water return device. Background Technology

[0002] In recent years, with the continuous development of mining activities, the problem of tailings ponds has become increasingly serious. Tailings ponds not only occupy a large amount of land resources, but also pose serious environmental hazards such as leakage pollution and poor accumulation stability. In order to alleviate the environmental pressure of tailings ponds, it is particularly important to effectively recover the wastewater resources accumulated in tailings ponds. At the same time, the recycling and utilization of tailings pond wastewater helps to alleviate the water shortage problem in mining areas and realize the recycling of water resources. Traditional water recovery devices include pumps, collection tanks, and drainage pipes, mainly relying on natural discharge or mechanical pumping. Natural discharge is inefficient, and a large amount of silted water cannot be discharged, occupying storage space. Although mechanical pumping is more efficient, it has high operating costs and is difficult to completely drain the water at the bottom of the tailings pond. Utility Model Content

[0003] The purpose of this invention is to provide a siphon-type water return device for tailings ponds, which solves the problems of low discharge efficiency, high operating costs, and difficulty in completely draining the water accumulated at the bottom of tailings ponds by traditional water return devices.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A tailings dam siphon-type water return device includes a roller, an inlet pipe, a return water pump, and a siphon pipe. The roller is fixed to the overflow tower frame of the tailings dam, and the siphon pipe is placed on the roller. The siphon pipe has a U-shaped pipe structure, and the pipe body is divided into an upstream section and a downstream section. The upstream section is shorter than the downstream section. The upstream section of the siphon pipe is connected to the return water pump, and the head of the return water pump is adapted to the height of the highest point of the siphon pipe and is slightly greater than its elevation. The return water pump is connected to the top of the inlet pipe, and the bottom end of the inlet pipe extends 1m below the water surface of the tailings dam. A slag screen is installed at the port of the inlet pipe to isolate floating objects such as tree branches and prevent debris in the tailings dam from entering the pipe and affecting the suction process. The downstream section extends into the overflow tower of the tailings dam, and the outlet of the downstream section is 2-5m below the water surface of the tailings dam. The outlet of the downstream section is lower than the port of the inlet pipe, so that the system can form a pressure difference. The downstream end of the siphon pipe is connected to the outlet pipe, and a pressure relief valve is installed on the upstream end of the siphon pipe near the return water pump.

[0006] Preferably, the outlet of the water pipe can swing flexibly to facilitate matching with the actual water return facilities on site, but the height of the outlet of the water pipe does not exceed the elevation of the downstream section of the siphon pipe.

[0007] Preferably, it also includes a fixed pulley, which is fixed to the overflow tower frame of the tailings dam, and a hemp rope is fixed on the water outlet pipe, with the other end of the hemp rope passing through the groove of the fixed pulley and tied to the operating platform.

[0008] Preferably, the water inlet pipe is a suction hose.

[0009] Working principle: When the return water pump is started, water from the tailings dam enters the siphon pipe through the inlet pipe, filling the siphon pipe and creating a liquid level difference between the upstream and downstream sections of the pipe, thus creating a pressure difference within the system. When the pressure difference is sufficient to overcome fluid resistance, the siphon effect begins, and the water from the tailings dam flows from the upstream section of the siphon pipe to the downstream section. At this point, the power to the return water pump is cut off, and water will continue to flow in through the inlet pipe. If the outlet pipe is connected to the mineral processing plant, the water will flow into the plant for recycling. To adjust the water flow rate, the difference in length and diameter between the upstream and downstream sections of the siphon pipe are controlled. The greater the difference in length (within a certain range) and the larger the pipe diameter, the greater the water flow rate. The size of the ball valve in the pressure relief valve on the upstream section of the siphon pipe changes with the pipe diameter, generally remaining at 1 / 3 of the pipe diameter. When siphon effect water return is needed, the ball valve of the pressure relief valve remains closed, providing conditions for negative pressure to be generated within the siphon pipe. When water return needs to be stopped, the pressure relief valve is opened, releasing air and eliminating the pressure difference within the siphon pipe, thus stopping the water return. The inlet pipe moves up and down with the tailings dam water level, and the rollers reduce friction, minimizing the risk of inlet pipe leakage. If the outlet pipe faces the tailings dam overflow tower wall, workers on the operating platform pull a rope to adjust the direction of the outlet pipe to prevent water from scouring the tailings dam overflow tower wall.

[0010] The beneficial effects achieved by this utility model are:

[0011] (1) The upstream and downstream sections of the siphon are designed with different pipe heights. The return water pump creates a liquid level difference between the upstream and downstream sections of the siphon. The liquid level difference creates a pressure difference to achieve continuous return water. The discharge efficiency is high and the water at the bottom of the tailings pond can be completely drained, saving a lot of manpower and material resources.

[0012] (2) By supporting the water inlet pipe with rollers, the water inlet pipe is less worn as it moves up and down with the water level, thus extending the service life of the water inlet pipe;

[0013] (3) Adjust the direction of the water outlet pipe by using hemp rope and fixed pulley to prevent the water in the water outlet pipe from washing the wall of the tailings dam overflow tower and reduce the maintenance cost of the tailings dam overflow tower;

[0014] (4) The device has a simple structure, low manufacturing and maintenance costs, and does not require external continuous power. It can effectively and efficiently discharge the water accumulated in the tailings pond, preventing tailings from overflowing and causing pollution to the environment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0016] Explanation of reference numerals in the attached diagram: 1. Inlet pipe; 2. Return water pump; 3. Siphon pipe; 4. Slag screen; 5. Pressure relief valve; 6. Outlet pipe; 7. Tailings dam overflow tower; 8. Idler roller; 9. Fixed pulley; 10. Hemp rope; 11. Operating platform. Detailed Implementation

[0017] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, a tailings dam siphon-type water return device includes a roller 8, a fixed pulley 9, an inlet pipe 1, a return water pump 2, and a siphon pipe 3. The roller 8 is fixed to the tailings dam overflow tower frame. The siphon pipe 3 is placed on the roller 8. The siphon pipe 3 has a U-shaped pipe structure, with an upstream section and a downstream section. The upstream section is shorter than the downstream section. The upstream section of the siphon pipe 3 is connected to the return water pump 2. The head of the return water pump 2 is adapted to the height of the highest point of the siphon pipe 3 and is slightly greater than its elevation. The return water pump 2 is connected to the top of the inlet pipe 1. The inlet pipe 1 is a suction hose. The bottom end of the inlet pipe 1 extends 1m below the water surface of the tailings dam. A slag screen 4 is installed at the end of the inlet pipe 1. The downstream section extends into the tailings dam overflow tower 7, and the outlet of the downstream section is 2m below the water surface of the tailings dam. The downstream section of the siphon pipe 3 is 5m long, with the inlet lower than the port of the inlet pipe 1. The downstream end of the siphon pipe 3 is connected to the outlet pipe 6, which can swing freely. A pressure relief valve 5 is installed on the upstream end of the siphon pipe 3 near the return pump 2. A fixed pulley 9 is fixed to the frame of the tailings dam overflow tower 7. A hemp rope 10 is fixed on the outlet pipe 6, with the other end of the rope 10 passing through the groove of the fixed pulley 9 and tied to the operating platform 11. A slag screen is used to isolate floating objects such as tree branches to prevent debris from entering the pipe and affecting the suction process. The downstream section of the siphon pipe is lower than the upstream section, allowing the system to form a pressure difference and eliminating the need for external continuous power to complete continuous return water. Rollers are used to support the inlet pipe, reducing the risk of pipe leakage when the inlet pipe moves.

Claims

1. A tailings dam siphon-type water return device, characterized in that, The system includes idler rollers, an inlet pipe, a return water pump, and a siphon. The idler rollers are fixed to the overflow tower frame of the tailings dam. The siphon is placed on the idler rollers and has a U-shaped structure. The pipe body is divided into an upstream section and a downstream section, with the upstream section being shorter than the downstream section. The upstream section of the siphon is connected to the return water pump, and the head of the return water pump is adapted to the height of the highest point of the siphon and is slightly greater than its elevation. The return water pump is connected to the top of the inlet pipe, and the bottom end of the inlet pipe extends 1m below the water surface of the tailings dam. A slag-straining screen is installed at the inlet pipe port. The downstream section extends into the overflow tower of the tailings dam, and the downstream pipe opening is 2-5m below the water surface of the tailings dam. The downstream pipe opening is lower than the inlet pipe port. The downstream end of the siphon is connected to an outlet pipe, and a pressure relief valve is installed on the upstream end of the siphon near the return water pump.

2. The tailings dam siphon-type water return device according to claim 1, characterized in that, The outlet of the water pipe can swing flexibly, but the height of the outlet of the water pipe shall not exceed the elevation of the downstream section of the siphon pipe.

3. The tailings dam siphon-type water return device according to claim 1, characterized in that, It also includes a fixed pulley, which is fixed to the overflow tower frame of the tailings dam, and a hemp rope is fixed to the water outlet pipe. The other end of the hemp rope passes through the groove of the fixed pulley and is tied to the operating platform.

4. A tailings dam siphon-type water return device according to claim 1, characterized in that, The water inlet pipe is a suction hose.

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