Central vertical feeding well device of thickener

Abstract

The utility model discloses a thickener's central vertical feed well device, including the vertical buffer area and radial buffer area that distributes up and down, the vertical buffer area includes the feed pipe that is vertically arranged, the feed pipe is internally and horizontally provided with a first baffle, the first baffle is evenly provided with a plurality of round holes for the slurry to pass through; the radial buffer area comprises an annular support, a cylindrical channel is vertically arranged on the lower surface of the center of the annular support, the feeding pipe is fixedly connected to the annular support, and an outlet of the feeding pipe is communicated with the cylindrical channel. The lower end of the cylindrical channel is supported and connected to the center supporting column, and then an outlet in the bottom end of the cylindrical channel is closed through the center supporting column. The device is simple in structure, can effectively dissipate the kinetic energy of the slurry and change the flowing direction without adopting a guide vane structure with a complex process and an external power device, so that the flow impact on a deposition layer in a concentration tank is small, and the device has a good natural dilution function, and effectively improves the particle separation efficiency of the large-scale thickener.

Description

Technical Field

[0001] The utility model belongs to the field of pulp concentration and clarification equipment in a separation type ore dressing process, and particularly relates to a central vertical feed well device of a thickener. Background Art

[0002] A thickener is a typical type of concentrating and clarifying equipment based on gravity sedimentation, widely used in industrial processes such as smelting, mineral processing, and wastewater treatment. In the separation process, the thickener concentrates the solid suspension into an underflow with a high solids content, providing a suitable feed for subsequent production processes such as flotation. It also reduces the mineral content in the overflow and increases the reuse rate of water resources. Currently, large thickeners in the mineral processing industry typically have diameters exceeding 10 meters, resulting in unsatisfactory separation efficiency, severe loss of metals such as tin, lead, and zinc, and high mineral particle content in the overflow water, making water reuse difficult.

[0003] The existing central vertical feed thickener has a high slurry flow rate. Direct flow of slurry into the thickening tank will greatly affect particle sedimentation. In order to minimize the impact of the slurry on the stable sedimentation environment when entering the thickening tank, the feed well structure must be designed so that the kinetic energy of the slurry can be effectively and fully dissipated in the feed well, thereby improving the particle separation efficiency of the thickener. Summary of the Invention

[0004] The purpose of the present invention is to solve the above-mentioned technical problems and provide a central vertical feed well device for a thickener. The present invention has a simple structure, does not adopt a guide vane structure with complicated process, does not require an external power device, can effectively dissipate the kinetic energy of the slurry, and change the flow direction, so that the sediment layer in the thickening tank is less impacted by the flow, and has a good natural dilution function, which effectively improves the particle separation efficiency of large thickeners.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is:

[0006] A central vertical feed well device for a thickener includes a vertical buffer zone and a radial buffer zone distributed above and below. The vertical buffer zone includes a vertically arranged feed pipe. A first baffle is horizontally arranged in the feed pipe. The first baffle is evenly provided with a plurality of circular holes for slurry to pass through.

[0007] The radial buffer zone includes an annular support with a cylindrical channel vertically arranged on the central lower surface, the feed pipe is fixedly connected to the annular support, and its outlet is connected to the cylindrical channel; the lower end support of the cylindrical channel is connected to the central pillar, and the central pillar then closes the bottom end outlet of the cylindrical channel, and the central pillar is fixed in the concentration tank and is coaxial with the cylindrical channel; a plurality of square holes for slurry to pass through are evenly opened along the circumference on the side wall of the cylindrical channel, and a second baffle is provided on the outer circumference of the cylindrical channel for radially limiting the slurry at the outlet of the square hole, and the second baffle is connected to the lower surface of the annular support;

[0008] The lower edge of the second baffle is located above the upper edge of the central pillar. The diameter of the central pillar is smaller than the diameter of the second baffle, so that a slurry outlet gap is formed between the second baffle and the central pillar.

[0009] As a further technical solution, the first baffle is arranged between the inlet of the feed pipe and the liquid surface of the concentration tank.

[0010] As a further technical solution, the above-mentioned square hole is immersed below the liquid surface of the concentration tank.

[0011] As a further technical solution, the lower edge of the second baffle mentioned above is located between the upper edge and the lower edge of the square hole.

[0012] As a further technical solution, the second baffle is connected to the lower surface of the outer ring of the annular bracket.

[0013] As a further technical solution, the distance between the second baffle and the outer surface of the cylindrical channel is at least 850 mm.

[0014] As a further technical solution, the diameter of the circular hole is 90-100 mm.

[0015] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention has a simple structure, does not adopt a complicated guide blade structure, and does not require an external power device. It can effectively dissipate the kinetic energy of the slurry and change the flow direction, so that the sediment layer in the concentration tank is less impacted by the flow, and has a good natural dilution function, which effectively improves the particle separation efficiency of large-scale thickeners. Specifically: the present invention designs a vertical buffer zone and a radial buffer zone, and proposes a design concept for changing the direction of slurry flow. The vertical buffer zone hinders the vertical flow of the slurry by setting a baffle with uniformly distributed circular holes in the vertically arranged feed pipe; in the radial buffer zone, the vertical flow of the slurry is further hindered by the connection limit between the lower end of the cylindrical channel and the central pillar, and at the same time, the slurry forms a vortex in the cylindrical channel, which promotes the dissipation of the kinetic energy of the slurry. The design of the square hole allows the vertically obstructed slurry to flow out radially, avoiding the impact of the slurry on the sedimentation layer in the concentration tank; when the slurry flows out from the square hole on the annular bracket, under the obstruction of the second baffle, a vortex is formed above the slurry outlet gap, which again dissipates part of the slurry kinetic energy, reduces the flow turbulence, and thus reduces the degree of interference with the particle sedimentation process in the concentration tank; in addition, the space area between the second baffle and the cylindrical channel is large, and the liquid with lower concentration in the concentration tank will follow the vortex to rise and enter the device from the square hole, thereby diluting the higher concentration slurry in the device, realizing natural dilution of the slurry with higher solid concentration in the feed well device without external power; at the same time, a sufficiently large space and a simple structure without guide blades are also conducive to the formation of flocs and the protection of the formed flocs from being destroyed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a central vertical feed well device of a thickener of the utility model;

[0017] Figure 2 This is a half-section diagram of a central vertical feed well device of a thickener according to the present invention;

[0018] Figure 3 This is a schematic diagram of the baffle structure of a central vertical feed well device of a thickener of the utility model.

[0019] Figure numerals: 1-feed pipe, 2-first baffle, 3-circular hole, 4-annular bracket, 5-cylindrical channel, 6-center pillar, 7-square hole, 8-second baffle, 9-slurry outlet gap. DETAILED DESCRIPTION

[0020] The present invention will be described in further detail below with reference to the examples, but the implementation of the present invention is not limited to the scope of the examples.

[0021] Example 1:

[0022] A central vertical feed well device of a thickener includes vertical buffer zones and radial buffer zones distributed above and below.

[0023] like Figure 1 As shown, the vertical buffer zone includes a vertically arranged feed pipe 1, a first baffle 2 is horizontally arranged in the feed pipe 1, and the first baffle 2 is arranged between the inlet of the feed pipe 1 and the liquid surface of the concentration tank, and is used to vertically buffer the incoming slurry and reduce the interference of the slurry on the sedimentation of particles in the concentration tank;

[0024] like Figure 3 As shown, the first baffle 2 is a disc structure, and 19 circular holes 3 for the slurry to pass through are evenly opened on the first baffle 2, and the diameter of the circular hole 3 is 100 mm;

[0025] like Figure 1 and Figure 2 As shown, the radial buffer zone includes an annular support 4 with a cylindrical channel 5 vertically arranged on the central lower surface. The feed pipe 1 is fixedly connected to the annular support 4, and its outlet is connected to the cylindrical channel 5;

[0026] The lower end of the cylindrical channel 5 is supported and connected to the central support 6, which then closes the bottom outlet of the cylindrical channel 5 to prevent the vertical flow of the slurry. At the same time, the slurry forms a vortex in the cylindrical channel 5 to promote the dissipation of the kinetic energy of the slurry.

[0027] The central pillar 6 is fixed in the concentrating tank and also serves as a base support;

[0028] Six square holes 7 are evenly distributed along the circumference of the side wall of the cylindrical channel 5 for the slurry to pass through. The square holes 7 are immersed below the liquid surface of the concentration tank. The design of the square holes 7 allows the slurry that is vertically blocked to flow out radially, thus avoiding the impact of the slurry on the sediment layer in the concentration tank.

[0029] The lower edge of the second baffle 8 is located between the upper and lower edges of the square hole 7 to ensure that the second baffle 8 forms a radial limit barrier to the slurry at the outlet of the square hole 7. Under the obstruction of the second baffle 8, a vortex is formed above the slurry outlet gap 9, which further dissipates part of the slurry kinetic energy, reduces the flow turbulence, and thus reduces the degree of interference with the particle settling process in the thickening tank.

[0030] The lower edge of the second baffle 8 is located above the upper edge of the central pillar 6. The diameter of the central pillar 6 is smaller than that of the second baffle 8, thereby forming a slurry outlet gap 9 between the second baffle 8 and the central pillar 6. The distance between the second baffle and the outer edge of the central pillar is 450 mm, so that the buffered slurry can flow obliquely into the thickening tank at a lower flow rate.

[0031] Furthermore, the second baffle 8 is 850 mm away from the outer edge of the cylindrical channel 5 to ensure that there is a sufficiently large space area between the second baffle 8 and the cylindrical channel 5. The liquid with lower concentration in the concentration tank will follow the vortex to rise and enter the device from the square hole 7, thereby diluting the higher concentration slurry in the device, and realizing the natural dilution of the slurry with higher solid concentration in the feed well device without external power; at the same time, the sufficiently large space and the simple structure of non-guide blades are also conducive to the formation of flocs and the protection of the formed flocs from being destroyed.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "front," "rear," "left," "right," "front," "tail," "vertical," "horizontal," "top," "bottom," "inside," and "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. It should also be noted that, unless otherwise expressly specified or limited, terms such as "connected" and "connect" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, point connections, direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Any device connection methods not fully described in this utility model are to be understood in accordance with conventional connection methods in the art.

[0033] The above embodiments are only specific examples to further illustrate the purpose, technical solutions and beneficial effects of the present invention, and the present invention is not limited thereto. Any modifications, equivalent replacements, improvements, etc. made within the scope of the present invention are included in the scope of protection of the present invention.

Claims

1. A central vertical feed well device for a thickener, characterized by: It includes vertical buffer zones and radial buffer zones distributed vertically. The vertical buffer zone includes a vertically arranged feed pipe. A first baffle is horizontally arranged inside the feed pipe. A plurality of circular holes for the slurry to pass through are evenly arranged on the first baffle. The radial buffer zone includes an annular support with a cylindrical channel vertically arranged on the central lower surface. The feed pipe is fixedly connected to the annular support, and its outlet is connected to the cylindrical channel. The lower end support of the cylindrical channel is connected to the central pillar, and the central pillar then closes the bottom end outlet of the cylindrical channel. The central pillar is fixed in the concentration tank. A plurality of square holes for slurry to pass through are evenly opened along the circumference of the side wall of the cylindrical channel. A second baffle is provided on the outer circumference of the cylindrical channel for radially limiting the slurry at the outlet of the square hole. The second baffle is connected to the lower surface of the annular support. The lower edge of the second baffle is located above the upper edge of the central pillar. The diameter of the central pillar is smaller than the diameter of the second baffle, so that a slurry outlet gap is formed between the second baffle and the central pillar.

2. A central vertical feed well device for a thickener according to claim 1, characterized in that: The first baffle is arranged between the feed pipe inlet and the liquid surface of the concentration tank.

3. The central vertical feed well device of a thickener according to claim 1, characterized in that: The square hole is immersed below the liquid surface of the concentration tank.

4. The central vertical feed shaft device of a thickener according to claim 1, characterized in that: The lower edge of the second baffle is located between the upper edge and the lower edge of the square hole.

5. The central vertical feed shaft device of a thickener according to claim 1, characterized in that: The second baffle is connected to the lower surface of the outer ring of the annular bracket.

6. A central vertical feed shaft device for a thickener according to claim 5, characterized in that: The distance between the second baffle and the outer surface of the cylindrical channel is at least 850 mm.

7. The central vertical feed shaft device of a thickener according to claim 1, characterized in that: The diameter of the circular hole is 90-100 mm.

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