A thickener flocculant dosing device

Abstract

The application discloses a thickener flocculant dosing device, which is characterized in that an outer central cylinder is arranged around a body central cylinder, the inner diameter of the outer central cylinder is larger than the outer diameter of the body central cylinder, and the outer central cylinder is coaxial with the body central cylinder; the upper end of the outer central cylinder is higher than the highest liquid level in the thickener body, and the lower end is higher than the highest lifting height of a rake frame of the thickener body; a flow-in hole is arranged at the position of the outer central cylinder which is level with the highest liquid level in the thickener body. An annular distribution chute is arranged around the central column, the outer surface of the annular distribution chute is provided with a flocculant dosing pipe, an adjusting valve is arranged on the flocculant dosing pipe, and one end of the flocculant dosing pipe is communicated with the inside of the annular distribution chute; the other end of the flocculant dosing pipe is inserted between the body central cylinder and the outer central cylinder and is close to the inner side wall of the outer central cylinder, and corresponds to the position of the flow-in hole. The application can improve the thickening and sedimentation functions of the thickener and improve the flocculant promoting sedimentation effect, so as to improve the processing capacity of the thickener and reduce the production cost.

Description

Technical Field

[0001] This invention relates to the field of thickener technology, and more specifically to a thickener flocculant dosing device. Background Technology

[0002] A thickener is a device used for solid-liquid separation, concentration, and dewatering. Peripheral drive thickeners, due to their high torque, are widely used in mining enterprises. In peripheral drive thickeners, the bridge is driven forward by a power unit meshing with gears on the peripheral tracks. Because the bridge is constantly in motion, the thickener can only be fed vertically from above a fixed central column through a feed pipe. This significant height difference inevitably causes the slurry to violently impact the slurry in the tank, resulting in violent tumbling and affecting the settling effect.

[0003] Flocculants are commonly used mineral processing agents to improve settling. Optimal flocculation occurs when the flocculant gel can fully contact the solid particles in the slurry with minimal agitation. However, the feeding method of peripheral drive thickeners dictates that flocculants can only be added through the feed pipe. This method is characterized by high feed speed and large impact, and the short contact time and small contact area between the flocculant and the slurry make it easy for even flocculated slurry particles to be dispersed. This results in flocculant waste and poor settling. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention aims to provide a thickening machine flocculant dosing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A thickener flocculant dosing device includes a thickener body with a central column at its center and a central cylinder surrounding the central column. It also includes an outer central cylinder surrounding the central cylinder, with an inner diameter larger than the outer diameter of the central cylinder and coaxial with it. The upper end of the outer central cylinder is higher than the highest liquid level inside the thickener body, and the lower end is lower than the highest liquid level inside the thickener body but higher than the highest lifting height of the thickener body's rake frame.

[0007] An inflow hole is provided at a position where the outer central cylinder is level with the highest liquid level (5) inside the thickener body;

[0008] A ring-shaped material distribution groove is provided around the central column. The ring-shaped material distribution groove is located above the central cylinder of the body. Its bottom is closed and its top is open. The ring-shaped material distribution groove is connected to the bridge of the thickener body and rotates synchronously.

[0009] The annular fabric trough is connected to a flocculant supply pipe.

[0010] The outer surface of the annular distribution groove is provided with a flocculant feeding pipe, the flocculant feeding pipe is provided with an adjusting valve and one end of the flocculant feeding pipe is communicated with the inside of the annular distribution groove; the other end of the flocculant feeding pipe extends into the space between the body central cylinder and the outer central cylinder and is close to the inner side wall of the outer central cylinder, and the other end of the flocculant feeding pipe corresponds to the position of the inflow hole;

[0011] The annular distribution groove, the body central cylinder and the outer central cylinder rotate synchronously with the bridge of the thickener body.

[0012] Further, the upper end of the outer central cylinder is 20-30 cm higher than the highest liquid level in the thickener body, and the lower end is 1.5-2 m lower than the highest liquid level in the thickener body and is limited by the highest lifting height of the rake frame.

[0013] Further, the outlet end of the flocculant feeding pipe is connected with an elbow of the same caliber; the outlet end of the elbow extends into the annular distribution groove.

[0014] Further, the inflow hole is square, and the top end of the wide side is higher than the highest liquid level in the thickener body.

[0015] Further, 4-6 inflow holes are uniformly arranged around the position of the outer central cylinder which is flush with the highest liquid level in the thickener body.

[0016] Further, the outer central cylinder and the central cylinder are connected by a plurality of support steels.

[0017] Further, the bridge of the thickener body is provided with a small-power self-suction pump, the inlet of the small-power self-suction pump is communicated with the inside of the thickener body through a pipeline, the outlet of the small-power self-suction pump is communicated with the annular distribution groove through a water feeding pipe, and the small-power self-suction pump is used for pumping the supernatant in the thickener body into the annular distribution groove.

[0018] Further, the annular distribution groove is arranged on a maintenance platform, and the maintenance platform rotates synchronously with the bridge of the thickener body.

[0019] The beneficial effects of this invention are as follows: In existing thickeners, because the slurry enters the tank vertically from a high point in the inlet pipe, under the influence of gravity and siphon, the air-infused slurry spreads and tumbles in all directions upon reaching the tank, creating an environment unsuitable for effective settling. In the thickener flocculant dosing device of this invention, by adding an outer central cylinder outside the main central cylinder, the rapid flow of the slurry can be blocked, thereby inhibiting the violent tumbling and rapid diffusion of the slurry after entering the thickening tank. This creates conditions for solid-liquid separation to occur under a calmer state, effectively improving the problem of high solids content in the supernatant, which is prone to turbidity, while the concentration of the underflow slurry cannot be increased. Furthermore, by adding structures such as an annular distribution trough, flocculant dosing pipe, and water dosing pipe, the impact on the slurry during flocculant dosing can be reduced, increasing the amount of flocculant solution, reducing the flocculant concentration, and increasing the contact opportunities between the flocculant and slurry particles. This agglomerates the particles, promoting sedimentation and thus achieving better solid-liquid separation. Attached Figure Description

[0020] Fig. 1 This is a general schematic diagram of the dosing device in an embodiment of the present invention;

[0021] Fig. 2 This is a schematic diagram illustrating the specific configuration of the annular fabric groove in an embodiment of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings. It should be noted that this embodiment is based on the present technical solution and provides detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to this embodiment.

[0023] This embodiment provides a device for adding a thickened mechanical flocculant, such as... Figs. 1-2 As shown, the system includes a thickener body 100, with a central column 101 at its center and a central cylinder 2 surrounding the central column 101. It also includes an outer central cylinder 1, which surrounds the central cylinder 2. The outer central cylinder 1 has an inner diameter larger than the outer diameter of the central cylinder 2 and is coaxial with it. The upper end of the outer central cylinder 1 is 20-30 cm above the highest liquid level inside the thickener body 100, and the lower end is 1.5-2 m below the highest liquid level inside the thickener body 100 but higher than the highest lifting height of the thickener body's rake frame.

[0024] An inflow hole 3 is provided at a position where the outer central cylinder 1 is level with the highest liquid level 5 in the thickener body, so that liquid outside the outer central cylinder 1 can flow into the space between the outer central cylinder 1 and the main body central cylinder 2.

[0025] An annular fabric groove 6 is provided around the central column 101. The annular fabric groove 6 is located above the central cylinder 2 of the main body, and its bottom is closed and its top is open.

[0026] The flocculant supply pipe 9 is connected to the ring-shaped distribution groove 6, the outlet end of the flocculant supply pipe 9 is connected to the same caliber elbow (135° elbow in this embodiment), and the outlet end of the elbow extends into the ring-shaped distribution groove 6. The elbow is used to realize the transition connection between the vertical flocculant supply pipe and the ring-shaped distribution groove, which can avoid the vertical impact of the flocculant on the ring-shaped distribution groove.

[0027] The outer surface of the ring-shaped distribution groove 6 is provided with a flocculant feeding pipe 7, the flocculant feeding pipe is provided with an adjusting valve 8, and one end of the flocculant feeding pipe communicates with the inside of the ring-shaped distribution groove 6; the other end of the flocculant feeding pipe 7 extends between the body center tube 2 and the outer center tube 1 and is close to the inner side wall of the outer center tube 1, and the other end of the flocculant feeding pipe 7 corresponds to the position of the inflow hole 3. In this way, the flocculant solution can be guided to the inner side of the inflow hole through the flocculant feeding pipe, so that the supernatant of the slurry overflowing from the inflow hole is mixed with the flocculant solution, the concentration of the flocculant solution is reduced, and the contact space of the flocculant and the slurry is increased.

[0028] The ring-shaped distribution groove 6, the body center tube 2, and the outer center tube 1 are connected to the bridge (not shown in the figure) of the thickener body 100 and rotate synchronously.

[0029] In this embodiment, the inflow hole 3 is square, the top end of the wide side is about 5 cm higher than the highest liquid level in the thickener body 100, which ensures that the slurry outside the outer center tube 1 can naturally and smoothly overflow into the space between the outer center tube 1 and the body center tube 2. Specifically, the square inflow hole is 30 cm long and 20 cm wide.

[0030] In this embodiment, 4-6 inflow holes 3 are evenly arranged around the position of the outer center tube 1 which is level with the highest liquid level in the thickener body.

[0031] In this embodiment, the outer center tube 1 and the body center tube 2 are connected by a plurality of support steels 4.

[0032] In this embodiment, a small-power self-suction pump (not shown in the figure) is arranged on the bridge of the thickener body 100 (the flow rate is appropriate when the ring-shaped distribution groove is not full), the inlet of the small-power self-suction pump is connected to the thickener body 100 through a pipeline, the outlet is connected to the ring-shaped distribution groove 6 through a water feeding pipe 10, and the small-power self-suction pump is used to pump the supernatant in the thickener body to the ring-shaped distribution groove to dilute the flocculant solution, increase the amount of flocculant, and increase the contact space of the flocculant and the slurry.

[0033] In this embodiment, the water feeding pipe 10 must be close to the inner wall of the outer periphery of the ring-shaped distribution groove 6 due to the relative movement with the flocculant supply pipe 9, and the sum of the pipe diameter of the water feeding pipe 10 and the pipe diameter of the flocculant supply pipe 9 should be less than the groove width of the distribution groove 6.

[0034] In the embodiment, the annular material chute 6 is arranged on the maintenance platform 11 which is connected with the bridge of the thickener body and rotates synchronously.

[0035] The working principle of the flocculant feeding device of the thickener is as follows: after the material is vertically fed through the feeding pipe from above the center column of the thickener body, the material enters the thickener body between the body center column and the outer center column. The outer center column can block the rapid flow of the slurry in the thickener body, thereby inhibiting the violent rolling and rapid diffusion of the slurry to the surrounding after entering the thickening tank. When there is a liquid level difference between the outer center column and the body center column, the liquid outside the outer center column flows into the space between the outer center column and the body center column through the inflow hole. The flocculant is added to the annular material chute through the flocculant feeding pipe, and the supernatant in the thickener body is pumped into the annular material chute through the low-power self-priming pump and the water feeding pipe to dilute the flocculant solution. By controlling the opening of the regulating valve, the flocculant solution can be guided to the inner side of the inflow hole through the flocculant feeding pipe, so that the supernatant of the slurry overflowing from the inflow hole is mixed with the flocculant solution.

[0036] For those skilled in the art, various corresponding changes and modifications can be made according to the above technical solutions and concepts, and all these changes and modifications should be included in the protection scope of the claims of the present application.

Claims

1. A thickener flocculant dosing device, comprising a thickener body (100), a center column (101) is arranged in the center of the thickener body (100), and a body center cylinder (2) is arranged outside the center column (101); characterized in that, Also included is an outer central cylinder (1) disposed around the body central cylinder (2), with an inner diameter greater than the outer diameter of the body central cylinder (2) and coaxial with the body central cylinder (2); the upper end of the outer central cylinder (1) is higher than the highest liquid level in the thickener body (100), and the lower end is lower than the highest liquid level in the thickener body (100) and higher than the highest lifting height of the rake frame of the thickener body; The outer central cylinder (1) is provided with an inflow hole (3) at a position level with the highest liquid level (5) in the thickener body (100); An annular distribution chute (6) is disposed around the central column (101), and the annular distribution chute (6) is located above the body central cylinder (2), with a closed bottom and an open top; the annular distribution chute (6) is connected to and rotates synchronously with the bridge frame of the thickener body (100); The annular distribution chute (6) is connected to a flocculant supply pipe; The outer surface of the annular distribution chute (6) is provided with a flocculant dosing pipe (7), the flocculant dosing pipe (7) is provided with an adjusting valve (8) and one end thereof communicates with the inside of the annular distribution chute (6); the other end of the flocculant dosing pipe (7) extends into the space between the body central cylinder (2) and the outer central cylinder (1) and is close to the inner side wall of the outer central cylinder (1), and the other end of the flocculant dosing pipe (7) corresponds to the position of the inflow hole (3); The annular distribution chute (6), the body central cylinder (2), and the outer central cylinder (1) all rotate synchronously with the bridge frame of the thickener body (100).

2. The thickener flocculant dosing apparatus of claim 1, wherein The upper end of the outer central cylinder (1) is 20-30 cm higher than the highest liquid level in the thickener body (100), and the lower end is 1.5-2 m lower than the highest liquid level in the thickener body (100) and is limited by not touching the highest lifting height of the rake frame.

3. The thickener flocculant dosing apparatus of claim 1, wherein The outlet end of the flocculant supply pipe (9) is connected to an elbow with the same diameter; the outlet end of the elbow extends into the annular distribution chute (6).

4. The thickener flocculant dosing apparatus of claim 1, wherein The inflow hole (3) is square, and the top end of the wide side is higher than the highest liquid level in the thickener body (100).

5. The thickener flocculant dosing apparatus of claim 1, wherein Four to six inflow holes (3) are uniformly provided around the position of the outer central cylinder (1) level with the highest liquid level in the thickener body.

6. The thickener flocculant dosing apparatus of claim 1, wherein The outer central cylinder (1) and the central cylinder (2) are connected by a plurality of support steels (4).

7. The thickener flocculant dosing apparatus of claim 1, wherein A small-power self-priming pump is provided on the bridge frame of the thickener body (100), the inlet of the small-power self-priming pump is connected to the inside of the thickener body (100) through a pipeline, and the outlet is connected to the annular distribution chute (6) through a water adding pipe (10); the small-power self-priming pump is used to pump the supernatant in the thickener body into the annular distribution chute.

8. The thickener flocculant dosing apparatus of claim 1, wherein The annular distribution chute (6) is provided on a maintenance platform (11), and the maintenance platform (11) rotates synchronously with the bridge frame of the thickener body (100).

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