Device for controlling flow velocity of ore pulp

Abstract

The utility model belongs to the field of self-flowing pipeline liquid medium conveying, and relates to a device for controlling the flow velocity of ore pulp, which comprises a buffer box, one end of the buffer box is provided with a feed port, and the other end of the buffer box is provided with a discharge port; the height difference between the feed port and the discharge port is 0.5-3 m; the distance between the discharge port and the bottom surface of the buffer box is 10-15 cm; two groups of baffles are arranged in the buffer box, are arranged in a staggered manner and are respectively positioned on two side walls of the buffer box; an included angle of 30 degrees is formed between the baffle and the side wall; wherein each group of baffles comprises at least one baffle. The device is mainly used for effectively controlling the flow speed of the ore pulp in the pipeline conveying process based on the self-flowing form.

Description

Technical Field

[0001] This utility model belongs to the field of gravity-flow pipeline transportation of liquid media, and relates to a device for controlling the flow rate of mineral slurry. Background Technology

[0002] In modern industrial production, utilizing the elevation differences of a location to employ gravity-flow production processes is a common practice. As fluid flows from higher to lower elevations, its flow velocity changes with the angle of inclination; the faster the flow, the greater the impact force on the lower parts.

[0003] In mining enterprises, the transportation of various types of water and slurries mostly adopts gravity-flow methods, with pipeline transportation being the most common. However, in practical applications, this transportation method has the following problems:

[0004] 1. Pipeline installation is limited by geographical location, with significant elevation differences and large angles between upstream and downstream processes, making the installation process difficult.

[0005] 2. Due to the large elevation difference and the fast flow rate of the slurry, the scouring of the bottom and side walls of the pipeline is more severe, which shortens the service life of the pipeline and causes frequent leaks.

[0006] 3. Excessive slurry flow rate leads to increased impact force, making it difficult to control the flow direction of downstream slurry.

[0007] 4. The strong downstream impact accelerates the scouring and wear of the pipeline, thus requiring higher wear resistance of the pipeline material used to transport slurry, which in turn increases the investment cost.

[0008] 5. The pipeline has a large elevation difference, making maintenance and replacement processes complicated and posing significant safety hazards to personnel during operations.

[0009] 6. The daily maintenance and repair work is extensive, and it is difficult to effectively control leaks. Utility Model Content

[0010] This application provides a device for controlling the flow rate of mineral slurry, mainly used to achieve effective control of the flow rate of mineral slurry during the process of transporting liquid media (mineral slurry) in a pipeline based on gravity flow.

[0011] To achieve the above technical objectives, the technical solution adopted in this application is a device for controlling the flow rate of slurry, comprising a buffer tank, wherein one end of the buffer tank is provided with a feed inlet and the other end is provided with a discharge outlet; the feed inlet and the discharge outlet have a height difference of 0.5-3m; and the discharge outlet is 10-15cm away from the bottom surface of the buffer tank.

[0012] The buffer box is equipped with two sets of baffles, which are staggered and located on the two side walls of the buffer box respectively; the baffles form a 30° angle with the side walls; each set of baffles includes at least one baffle.

[0013] As an improved technical solution of this application, a three-way pipe is installed at the feed inlet, with two openings in a horizontal position, one for feeding and one for sealing; the outlet of the three-way pipe is perpendicular to the horizontal direction and faces the bottom surface of the buffer box; the center line between the sealed opening of the three-way pipe and the center line of the outlet of the three-way pipe is more than 50cm.

[0014] As an improved technical solution of this application, the outlet of the three-way pipe is at least 1m away from the bottom surface of the buffer box.

[0015] As an improved technical solution of this application, any two adjacent baffles in the two sets of baffles have a spacing of 1-1.5m.

[0016] As an improved technical solution of this application, the top surface of the buffer box has an open structure.

[0017] As an improved technical solution of this application, the width of the baffle is between 3 / 4 and 4 / 5 of the width of the buffer box.

[0018] Beneficial effects

[0019] This application utilizes a buffer tank to reduce the flow rate of slurry in a gravity-flow pipeline. The bottom of the buffer tank must be kept horizontal. The buffer tank adopts a high inlet and low outlet design, and the connection is made by utilizing the height difference between the inlet and outlet of the buffer tank itself, which makes the installation simple.

[0020] With the buffer box design, the direction of the discharge pipe is not restricted. It can be parallel to the feed pipe or installed on the side to form any angle with it. This effectively avoids the problem of difficulty in controlling the installation angle when using elbows to change the flow direction, and at the same time solves the problem of short wear cycle of elbows due to direct impact from slurry.

[0021] The installation angle requirement for the discharge pipe is low, and it can be adjusted freely in any direction. This changes the traditional pipe elbow connection size requirement, making installation simple and ensuring smooth connection between upstream and downstream processes.

[0022] The service life of the buffer tank is more than three times that of the pipeline, and it is easy to inspect and maintain, which reduces the maintenance intensity of workers and greatly improves maintenance efficiency. At the same time, maintenance costs are reduced by more than half, thus ensuring stable production.

[0023] The buffer box replaces the pipeline, eliminating the need to consider high-standard sealing and grout leakage issues. It effectively relieves pressure and reduces the likelihood of leaks and other problems on site, significantly improving on-site management. Attached Figure Description

[0024] Figure 1 Top view of the device in this application;

[0025] Figure 2 Cross-sectional view of the device in this application at the centerline position;

[0026] In the diagram, 1 is a three-way pipe; 2 is a buffer box; 3 is a baffle; and 4 is a discharge port. Detailed Implementation

[0027] When using gravity-flow slurry transportation, problems arise in the pipeline process, including high internal pressure, large impact force, and short service life. To effectively control and solve these problems, this application provides a device for controlling the slurry flow rate, including a buffer tank. The bottom of the buffer tank must be kept horizontal, and the feed pipe adopts a high inlet and low outlet design, utilizing the height difference between the inlet and outlet of the buffer tank itself for connection, simplifying installation. Because a larger buffer tank results in greater weight, higher cost, more complex installation and fixing, and a tendency for deformation, a height difference of less than 3m is suitable for practical applications. Therefore, in the design, the buffer tank has an inlet at one end and an outlet 4 at the other end; the height difference between the inlet and outlet 4 is 0.5-3m.

[0028] The feed inlet is located high near the top of the buffer tank. Taking advantage of this elevated position, this application employs a three-way pipe 1 for feeding, with the outlet of the three-way pipe 1 facing downwards. Specifically, a three-way pipe 1 is installed at the feed inlet, with one horizontal port for feeding and the other closed. The outlet of the three-way pipe 1 is perpendicular to the horizontal direction and faces the bottom of the buffer tank 2. The closed port of the three-way pipe 1 is at least 50 cm away from the centerline of the outlet, meaning that there is a distance of at least 50 cm between the end of the horizontal section of the three-way pipe 1 and the center of the outlet pipe, thus achieving primary buffering when the slurry flows in.

[0029] The discharge port 4 is 10-15cm away from the bottom of the buffer tank 2. The discharge pipe (fixed to the discharge port 4) is designed with a low discharge point so that the flow rate of the slurry after passing through the buffer tank 2 can be controlled without being affected by the position of the discharge pipe, ensuring a smooth flow connection at the bottom. The discharge pipe is generally connected to the tank body (the tank body of the buffer tank) by welding. The discharge pipe (discharge port) is 10-15cm away from the bottom of the tank body, allowing for material accumulation space inside the tank. After the material accumulates, it forms a protective layer to prevent the slurry from flowing and eroding the bottom of the tank body.

[0030] In practical applications, thanks to the design of buffer box 2, the direction of the discharge pipe (installed at the discharge port) is not restricted. It can be parallel to the feed pipe or installed on the side to form any angle with it. This effectively avoids the problem of difficulty in controlling the installation angle when using elbows to change the flow direction, and at the same time solves the problem of short wear cycle of elbows due to direct impact from slurry.

[0031] The buffer tank 2 is equipped with two sets of baffles, which are staggered and located on the two side walls of the buffer tank 2. Each set of baffles includes at least one baffle 3. The multiple baffles 3 work together to buffer the slurry in an S-shaped path, thereby effectively reducing impact force and lowering the flow velocity. The baffles 3 form a 30° angle with the side walls, creating dead zones in some areas of the slurry within the buffer tank, forming mineral sedimentation and accumulation, preventing the slurry from directly impacting the baffles, thus extending their service life.

[0032] The outlet of the three-way pipe 1 is at least 1m away from the bottom surface of the buffer box 2.

[0033] As an improved technical solution of this application, in order to ensure that the slurry has a certain settling and accumulation time between the two baffles in the buffer tank, the incoming slurry first passes through the baffle to reduce the flow rate before entering the buffer area of ​​the next baffle, the effective distance between any two adjacent baffles 3 in the two sets of baffles is controlled at 1-1.5M.

[0034] As an improved technical solution in this application, the top surface of the buffer tank 2 is an open structure. The open top of the buffer tank 2 can effectively release the pressure generated by the flow of slurry inside the pipeline, solve the sealing difficulties at the pipeline joints, and improve the on-site environment.

[0035] As an improved technical solution of this application, the width of the baffle 3 is between 3 / 4 and 4 / 5 of the width of the buffer tank 2. Based on the incoming slurry flow rate and volume, the clearance between each baffle and the tank body is slightly smaller than the inner diameter of the tee pipe. Simultaneously, the width of the baffle is the same as 3 / 4 to 4 / 5 of the width of the tank body (the height of the baffle 3 is aligned with the height direction of the buffer tank 2), ensuring that the slurry surface remains between the two baffles, thus achieving the effects of buffering the incoming slurry and slurry accumulation.

[0036] Example 1

[0037] Practical Application: In a mineral processing plant, the tailings slurry from magnetic separation flows by gravity to a thickener. The maximum production flow rate is 200 T / h, transported via Φ630 nylon pipeline. The maximum short-distance drop occurs at a 2.5m height difference along a 6m horizontal transport length, with a steep slope and a roughly 100° turn at the lowest point altering the flow direction. This area experiences high impact force, rapid flow velocity, and frequent malfunctions. Based on the site dimensions, a 5.5m long, 2.5m wide, and 2.5m high buffer tank has been designed to replace this pipeline. First, fabricate a 1.5m long feed tee (tee pipe). Position the outlet of the tee pipe 1m away from the bottom of the box and extend it 1.2m into the buffer box. Then, design three buffer baffles 3 based on the 5.5m length of the box. The baffles 3 are 2m long and 2.3m high. The first baffle is located on the left side of the box, 1.7m from the feed side, with a 30° angle. The baffle is installed exactly 30cm from the front end of the feed tee. Similarly, the second baffle is installed on the right side at 3.2m, and the third baffle is installed on the left side at 4.7m, all with a 30° angle. Finally, fabricate the discharge pipe connecting the discharge port to the box (discharge pipe). The discharge pipe extends 10cm into the box and is installed 15cm from the bottom of the box. After being put into use, the slurry flow rate was reduced from 8.9 m / s to 2.8 m / s through three buffer plates, which is a significant effect. In addition, the bottom of the tank has a stack thickness of 10 cm, which is strong in terms of wear resistance and is consistent with the original design intention.

Claims

1. A device for controlling the flow rate of mineral slurry, characterized in that, The device includes a buffer box, with an inlet at one end and an outlet at the other end; the inlet and outlet have a height difference of 0.5-3m; and the outlet is 10-15cm away from the bottom surface of the buffer box. The buffer box is equipped with two sets of baffles, which are staggered and located on the two side walls of the buffer box respectively; the baffles form a 30° angle with the side walls; each set of baffles includes at least one baffle.

2. The device for controlling slurry flow rate according to claim 1, characterized in that, A three-way pipe is installed at the feed inlet, with two horizontal openings, one for feeding and one for sealing. The outlet of the three-way pipe is perpendicular to the horizontal direction and faces the bottom of the buffer tank. The centerline between the sealed opening of the three-way pipe and the outlet of the three-way pipe is at least 50 cm away.

3. The device for controlling slurry flow rate according to claim 2, characterized in that, The outlet of the tee pipe is at least 1 meter away from the bottom surface of the buffer box.

4. The device for controlling slurry flow rate according to claim 1, characterized in that, The distance between any two adjacent baffles in the two sets of baffles is 1-1.5m.

5. The device for controlling slurry flow rate according to claim 1, characterized in that, The top surface of the buffer box has an open structure.

6. The device for controlling slurry flow rate according to claim 1, characterized in that, The width of the baffle is between 3 / 4 and 4 / 5 of the width of the buffer box.

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