Flocculation state adjustable steady flow barrel, concentrator and working method thereof

Abstract

This application provides a flow stabilizer, a thickener, and a method for operating the flow stabilizer with adjustable flocculation state. The flow stabilizer includes: an inner cylinder with open top and bottom, forming a first through channel inside; an outer cylinder surrounding the inner cylinder, with its bottom end watertightly connected to the bottom end of the inner cylinder and its top end higher than the top end of the inner cylinder; a second channel formed in an annular region between the inner and outer cylinders, with the top end of the second channel communicating with the top end of the first channel; a feed pipe located at the lower part of the outer cylinder and penetrating the outer cylinder; a first filling pipe penetrating the feed pipe from the outside; and a second filling pipe located at the lower part of the outer cylinder and penetrating the outer cylinder from the outside. The flow stabilizer provided by this application can adjust the flocculation state according to the flow process of the slurry, achieving sufficient flocculation of the slurry and significantly improving the thickening effect.

Description

Technical Field

[0001] This application belongs to the field of thickener technology, and provides a flow stabilizer with adjustable flocculation state, a thickener including the flow stabilizer and its working method. Background Technology

[0002] A thickener is a solid-liquid separation device that can operate continuously. It is mainly used for the clarification treatment of slurry in the field of wet mineral processing. When the thickener is working, the slurry is stabilized and flocculated through a flow stabilizer. The slurry that has reached the flocculation state settles to the bottom of the thickener and is further concentrated and recovered. The water in the slurry is filtered and discharged as an overflow.

[0003] During the feeding, stabilization, and settling processes, the flow rate and flow state of the slurry are in a dynamic process. At the same time, with the addition of flocculant, the size and density of the flocculated flocs in the slurry are constantly changing. In order to achieve a high concentration efficiency, the ideal flocculation process should proceed gradually along with the flow rate and flow state of the slurry. In the feeding stage, the slurry should start flocculating as soon as possible. When the slurry enters the stabilization state, while ensuring sufficient flocculation, it is necessary to avoid some flocs being too large, which would cause the settling speed to be too fast and lead to secondary dispersal. Finally, the slurry in the fully flocculated state should be allowed to settle stably and uniformly as much as possible.

[0004] However, most existing stabilizing tanks change the flow direction of the slurry by adjusting the structure. For example, Chinese patent CN103301659A provides a stabilizing device for a thickener, which drives the slurry to rise through spiral blades set in the middle cylinder. During the rise, the slurry is mineralized by falling and colliding with the rising slurry, thereby enhancing the flocculation effect. However, the above structure not only causes mutual interference between the rising and falling fluids in the same space, but also generates strong shear force and turbulence during the transformation of solid particles in the slurry into flocs, which can easily break up the flocs again and reduce the flocculation effect. At the same time, because the flocculation process is not precisely controlled according to the changes in the state of the slurry, the flocs cannot enter the sedimentation layer evenly and fully, thus affecting the thickening effect. Summary of the Invention

[0005] The purpose of this application is to solve the problems existing in the prior art and to provide a stabilizing tank with adjustable flocculation state, a thickener and its working method.

[0006] The first aspect of this application provides a flow stabilizer with adjustable flocculation state, comprising:

[0007] The inner cylinder has an open structure at both the top and bottom, forming a through first channel inside;

[0008] An outer cylinder surrounds the outside of the inner cylinder, its bottom end is watertightly connected to the bottom end of the inner cylinder, its top end is higher than the top end of the inner cylinder, and the annular region between the inner cylinder and the outer cylinder forms a second channel, the top end of the second channel is connected to the top end of the first channel;

[0009] The feed pipe is located at the lower part of the outer cylinder and extends through the outer cylinder;

[0010] The first filling tube extends through the feed tube from the outside;

[0011] The second filling pipe is located at the lower part of the outer cylinder and extends through the outer cylinder from the outside.

[0012] Preferably, the feed pipe extends through the outer cylinder along the tangential direction of the outer cylinder.

[0013] Preferably, the ratio of the inner diameter of the inner cylinder to the radial width of the second channel is 4:1 to 8:1.

[0014] Preferably, the flocculation state adjustable flow stabilizing tank further includes: a third injection pipe, which penetrates the outer cylinder from the outside and the penetration position is higher than the top of the inner cylinder.

[0015] Preferably, the portion of the second channel below the connection between the feed pipe and the outer cylinder is an annular channel; the portion of the second channel above the connection between the feed pipe and the outer cylinder is a spiral groove channel.

[0016] Preferably, the connection point between the second filling tube and the outer cylinder is located above the starting point of the spiral groove channel, and the connection point between the third filling tube and the outer cylinder is located above the ending point of the spiral groove channel.

[0017] Preferably, the stabilizing tank with adjustable flocculation state further includes a dispersing and guiding device disposed at the lower part of the inner cylinder.

[0018] A second aspect of this application provides a concentrator, comprising:

[0019] The concentration tank has an open top and a conical sedimentation zone at the bottom with a through-hole recovery port.

[0020] The aforementioned stabilizing tank with adjustable flocculation state has its inner cylinder bottom located inside the concentration tank, and its top end higher than the top end of the concentration tank.

[0021] A third aspect of this application also provides a method for operating a thickener, which uses the aforementioned thickener to concentrate and recover slurry, comprising the following steps:

[0022] S1: Pump the slurry into the outer cylinder through the feed pipe, and add flocculant to the slurry in the feed pipe to make the sludge particles contained therein begin to combine and form flocs;

[0023] S2, adjust the slurry pumping pressure to change the turbulent flow of the slurry in the second channel from horizontal to spiral flow from bottom to top and gradually reduce the flow velocity, and add flocculant to the slurry in the second channel to further flocculate it;

[0024] S3, add flocculant to the slurry according to its state when it reaches the top of the second channel, so that the slurry entering the first channel reaches a fully flocculated state;

[0025] S4, the slurry in a fully flocculated state enters the first channel in a circumferential direction, and the flocs contained therein settle to the sedimentation zone of the concentration tank through the bottom of the first channel under the action of gravity and are recovered through the recovery port.

[0026] The adjustable flocculation state stabilizing tank provided in this application can add flocculant according to the flow rate, flow direction and flow state of the slurry at different stages of the thickening process, so as to match the movement state of the slurry with its flocculation state, and ensure that the slurry can achieve complete flocculation when entering the settling stage without reducing the processing efficiency. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of a flow stabilizing tank with adjustable flocculation state provided according to Embodiment 1 of this application;

[0028] Figure 2 A side view of a flow stabilizing tank with adjustable flocculation state provided according to Embodiment 1 of this application;

[0029] Figure 3 A top view of the flow stabilizing tank with adjustable flocculation state provided according to Embodiment 1 of this application;

[0030] Figure 4 This is a half-sectional schematic diagram of a flow stabilizing tank with adjustable flocculation state provided according to Embodiment 1 of this application;

[0031] Figure 5 This is a three-dimensional structural diagram of a flow stabilizing tank with adjustable flocculation state provided according to Embodiment 2 of this application;

[0032] Figure 6 A side view of the concentrator provided according to Embodiment 3 of this application;

[0033] Figure 7 A flowchart illustrating the operation method of the concentrator provided according to Embodiment 3 of this application;

[0034] Figure 8A side view of a flow stabilizing tank with adjustable flocculation state provided according to Embodiment 4 of this application;

[0035] Figure 9 This is a half-sectional schematic diagram of a flow stabilizing tank with adjustable flocculation state provided according to Embodiment 4 of this application.

[0036] Figure 10 This is a schematic diagram of the dispersing and guiding device according to Embodiment 4 of this application.

[0037] Numbers in the diagram

[0038] Feed pipe 1, bend 11, inner cylinder 2, outer cylinder 3, outer cylinder wall 31, outer cylinder bottom 32, outer cylinder cover 33, first channel 41, second channel 42, annular channel 421, spiral groove channel 422, first filling pipe 51, second filling pipe 52, third filling pipe 53, spiral guide plate 6, dispersing and guiding device 7, blade 71, connecting shaft 72, guiding cone 73, supporting structure 74, thickener 800, flow stabilizer 81, thickener tank 82, recovery port 83. Detailed Implementation

[0039] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0040] Furthermore, for ease of understanding, various components on the drawings have been enlarged or reduced, but this is not intended to limit the scope of protection of this application.

[0041] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, in the description of this application, in order to distinguish different units, the terms "first," "second," etc. are used in this specification, but these are not limited by the manufacturing order, nor should they be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application.

[0042] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0043] [Example 1]

[0044] Embodiment 1 of this application provides a flow stabilizer with adjustable flocculation state. The flow stabilizer can be used as a slurry flow stabilization mechanism in a thickener so that the pumped slurry can settle stably.

[0045] Figure 1 This diagram shows a three-dimensional structural schematic of the adjustable flocculation state flow stabilizing tank provided in Example 1. Figure 2 , Figure 3 The side view and top view of the flow stabilizer are shown respectively. Figure 4 The flow stabilizer tank was partially cut off, with the cutting line shown as follows: Figure 3 The CC line in the diagram.

[0046] To achieve the above objectives, this application provides a flow stabilizing tank with adjustable flocculation state. Figure 1 A three-dimensional structural schematic diagram of a flow stabilizing tank with adjustable flocculation state is shown in some embodiments. Figure 2 This is a schematic diagram illustrating the principle of using an adjustable flocculation state flow stabilizer in thickeners and other thickening systems to achieve slurry concentration. Figure 3 Figure 4 further shows a side view (its internal structure is shown in dashed lines) and a top view of the adjustable flocculation state stabilizing tank.

[0047] like Figures 1 to 4 As shown, the adjustable flocculation state flow stabilizing tank includes an inlet pipe 1, an inner cylinder 2 and an outer cylinder 3, a first filling pipe 51 and a second filling pipe 52, all made of waterproof and wear-resistant material.

[0048] The inner cylinder 2 is a vertically oriented cylindrical structure with openings at both the top and bottom, forming a first channel 41 that runs vertically through the interior. The outer cylinder 3 has an outer wall 31 located outside the inner cylinder 2. The lower end of the outer wall 31 is watertightly connected to the bottom of the inner cylinder 2 via the outer cylinder bottom 32. The top of the outer wall 31 is higher than the top of the inner cylinder 2. The inner cylinder 2, the outer wall 31, and the outer cylinder bottom 32 form a second channel 42 in an annular region. Clearly, as... Figure 2 , Figure 4 As shown, the top of the second channel 42 is connected to the top of the first channel 41. Figure 2 and Figure 3 As shown, the inner diameter of the outer cylinder 3 is D1, and the inner diameter of the inner cylinder 2 is D2 (generally, the wall thickness of the outer cylinder 3 and the inner cylinder 2 is much smaller than their diameter or pipe diameter, so it can be assumed that their inner diameter and outer diameter are basically the same). Then the radial distance between the outer cylinder 3 and the inner cylinder 2, that is, the radial width of the second channel 42, is L1=(D2-D1) / 2.

[0049] Generally, the top of the outer cylinder 3 is provided with an outer cylinder cover 33, and the outer cylinder cover 33 may have an opening for balancing the internal and external pressures and observing the state of the slurry.

[0050] Feed pipe 1 is used to input slurry into the second channel 42, such as Figures 1 to 4 As shown, the feed pipe 1 is horizontally set at the lower part of the outer cylinder 3 and passes through the outer cylinder 3. Generally, the feed pipe 1 is connected to the slurry injection pipeline through flanges, etc. After the slurry is pumped into the outer cylinder 3 from the feed pipe 1, it flows spirally along the second channel 42 under the action of the pumping pressure and gradually rises to the top of the inner cylinder 2. During the rising process, the slurry's kinetic energy continuously weakens under the action of its own gravity and the resistance of the water flow below the liquid surface, and the flow state gradually changes from irregular turbulence to steady flow. Finally, it flows into the first channel 41 in a rotating manner at the top of the inner cylinder 2 and settles under the action of gravity.

[0051] During the horizontal injection, rotational ascent, and vertical settling of the slurry, the slurry's flow velocity, direction, and state are all different. Therefore, the addition of flocculant should match the slurry's motion state with the particle flocculation state. Otherwise, the slurry and the added flocculant may not react sufficiently, or the flocculation reaction may occur prematurely, leading to the premature formation of large flocs and their early settling. This can result in the flocs being broken up a second time or colliding with other particles, causing turbulence.

[0052] Therefore, in Example 1, as Figures 1 to 4 As shown, the flow stabilizing tank includes at least two injection pipes for injecting flocculant. The first injection pipe 51 is located at the feed pipe position and extends through the feed pipe 1 from the outside. The second injection pipe 52 is located at the lower part of the outer cylinder 3 and extends through the outer cylinder 3 from the outside. Generally, a one-way valve or similar mechanism is provided in the injection pipe to ensure that the flocculant can be pumped in one direction and combine with the slurry.

[0053] The first injection pipe 51 is located at the feed pipe 1. Since it is closest to the slurry pump, the slurry flow speed is the fastest and the flow state is the most unstable at this point. Injecting flocculant here can make the flocculant fully and evenly mix with the slurry and cause the particles in the slurry to begin to flocculate. The second injection pipe 52 is located at the lower part of the outer cylinder. After the slurry enters the outer cylinder 3, it first rotates in the lower part of the annular second channel 42. At the same time, it is spirally lifted under the pressure of the slurry pump. By adding flocculant in the lower part of the second channel 42, as the speed of the slurry gradually slows down during the rotation and lifting process, the turbulence gradually weakens, the flocculation effect gradually strengthens, and the flocs can grow more evenly.

[0054] The feeding direction of the feed pipe 1 and the structure of the inner cylinder 2 and the outer cylinder 3 can be optimized to ensure further matching between the slurry flow state and the flocculation state. For example, the feed pipe 1 is preferably connected to the feed pipe along the tangent direction of the outer cylinder 3; another example is that the preferred range of the ratio of the inner diameter D2 of the inner cylinder 2 to the radial width L1 of the second channel 42 is 4:1 to 8:1.

[0055] [Example 2]

[0056] Figure 5 This is a schematic diagram of the structure of the adjustable flocculation state stabilizing tank provided in Embodiment 2 of this application. The difference between this embodiment and Embodiment 1 is the addition of a third injection pipe 53, as shown below. Figure 5 As shown, the third filling pipe 53 is located at the upper part of the outer cylinder 3 and penetrates the outer cylinder 3 from the outside. Preferably, the penetration position is higher than the top of the inner cylinder 2.

[0057] As mentioned earlier, the top of the second channel 42 is connected to the top of the first channel 41. After the slurry flows upwards and rotates to the top of the second channel 42, it flows circumferentially into the first channel 41 and enters the settling process. Ideally, the slurry should flow smoothly and slowly horizontally here, with the particles fully flocculated and the floc size distribution relatively uniform, thus achieving regular and consistent settling under gravity. By setting a third injection pipe 53 at a position higher than the top of the inner cylinder 2, the amount of flocculant injected can be adjusted according to the flow state of the slurry and the size and distribution of the flocs during the process of the slurry entering the first channel 41 from the second channel 42, so that the slurry reaches the ideal flocculation state.

[0058] [Example 3]

[0059] Figure 6 A side view of a thickener 800 provided for Embodiment 3 of this application, the thickener 800 being used to thicken mineral slurry, such as... Figure 6As shown, it includes the aforementioned adjustable stabilizing tank 81 and a concentration tank 82. Specifically, the top of the concentration tank 82 is an open structure, and the bottom has a conical sedimentation zone and a through recovery port 83 to collect the concentrated material.

[0060] The lower end of the inner cylinder of the stabilizing tank 81 is located inside the thickener 82 (when in use, the liquid level in the thickener 82 is higher than the lower end of the inner cylinder), and the elbow 11 is used to connect the feed pipe and the slurry pump.

[0061] Furthermore, the top of the inner cylinder is higher than the top of the concentration tank 82. Preferably, the height difference between the top of the inner cylinder and the top of the concentration tank 82 is greater than or equal to 20 cm, and the ratio of the pipe diameter of the concentration tank 82 to the pipe diameter of the inner cylinder is 6:1 to 8:1.

[0062] Example 3 also provides a preferred operating method for the concentrator 800, such as... Figure 7 As shown, its working method includes the following steps:

[0063] S1: Pump the slurry into the outer cylinder through the feed pipe, and add flocculant to the slurry in the feed pipe to make the sludge particles contained therein begin to combine and form flocs;

[0064] S2, adjust the slurry pumping pressure to change the turbulent flow of the slurry in the second channel from horizontal to spiral flow from bottom to top and gradually reduce the flow velocity, and add flocculant to the slurry in the second channel to further flocculate it;

[0065] S3, add flocculant to the slurry according to its state when it reaches the top of the second channel, so that the slurry entering the first channel reaches a fully flocculated state;

[0066] S4, the slurry in a fully flocculated state enters the first channel in a circumferential direction, and the flocs contained therein settle to the sedimentation zone of the concentration tank through the bottom of the first channel under the action of gravity and are recovered through the recovery port.

[0067] [Example 4]

[0068] To ensure the slurry rotates and rises counter-currently within the second channel 42, it is generally necessary to maintain the pressure at the inlet 53. However, increasing this pressure will increase the flow velocity of the slurry in the lower part of the second channel 42. Although some agitation at this point can promote the full dispersion of the flocculant, the increased turbulence may disrupt the stable and continuous flocculation of the slurry during its ascent. While reducing the pumped slurry pressure can alleviate turbulence, this not only reduces the amount of slurry processed per unit time but also causes larger, already coagulated flocs to fall vertically when the slurry rises to the upper part of the second channel 42, resulting in turbulence in the upper part of the second channel 42. The causes of the turbulence occurring in the lower and upper parts of the second channel are different. Obviously, simply adjusting the slurry pressure pumped into the stabilizing tank cannot solve both problems simultaneously.

[0069] Therefore, Example 4 further optimized the flow stabilizing tank with adjustable flocculation state. Figure 8 and Figure 9 Its side view and half-section view are shown respectively, as follows: Figure 8 and Figure 9 As shown, in embodiment 4, the second channel 42 is further divided into annular channel 421 and spiral groove channel 422 from bottom to top.

[0070] The annular channel 421 is formed by the inner cylinder 2 and the outer cylinder 3, and its shape is similar to the second channel 42 in Embodiment 1. Its height is lower than the connection between the feed pipe 1 and the outer cylinder 3. The spiral channel 422 is located above the annular channel and communicates with the annular channel 421. Preferably, it is formed by the inner cylinder 2, the outer cylinder 3, and the spiral guide plate 6. The spiral guide plate 6 can be made of wear-resistant metal or other materials, and its two sides are continuously and fixedly connected to the inner cylinder 2 and the outer cylinder 3 respectively by welding, riveting, or other methods. Figure 8 and Figure 9 As shown, the starting point of the spiral groove channel 422 is connected to the annular channel 421 (preferably, the starting point height is higher than the connection between the feed pipe 1 and the outer cylinder 3), and its ending point is connected to the first channel 41.

[0071] More preferably, the connection between the second filling pipe 52 and the outer cylinder 3 is located above the starting point of the spiral groove channel 422, and the connection between the third filling pipe 53 and the outer cylinder 3 is located above the ending point of the spiral groove channel 422.

[0072] By dividing the second channel into a lower annular channel 421 and an upper spiral channel 422, the slurry, after entering the outer cylinder 3, can first slowly rotate and rectify in the larger bottom annular space and be fully mixed with the flocculant injected through the first injection pipe 51. Then, driven by the internal slurry pressure and guided by the spiral guide plate 6, it enters the spiral channel 422 and rises in the opposite direction (at the starting point of the spiral channel, flocculant is injected again through the second injection pipe 52). The spiral channel 422 can not only effectively rectify the flow direction of the slurry, thereby reducing the turbulence caused by the excessive flow velocity at the bottom of the outer cylinder 3, but also, because the upper and lower layers of the channel are isolated from each other by the spiral guide plate 6, the slurry and the flocs generated by slurry flocculation can only rise in the opposite direction under the push of the slurry pump. This effectively avoids the turbulence caused by the direct fall of large flocs at the top of the outer cylinder 3, and avoids the phenomenon of flocs being dispersed again due to falling during the reverse rise.

[0073] Preferably, the ratio of the diameter of the inner cylinder 2 to the pitch L2 of the spiral channel 422 is 4:1 to 8:1; the ratio of the diameter of the feed pipe 1 to the pitch of the spiral channel 422 is 3:1 to 6:1. With the above configuration, a stable reverse flow of the slurry can be achieved while ensuring the slurry flow rate per unit time, thus balancing the slurry processing speed and effect.

[0074] After the slurry rises along the second channel 42 and enters the first channel 41, it will settle under its own weight. At this time, the flocculated flocs in the slurry are of varying sizes, and some excessively large flocs fall at a significantly faster rate than other smaller flocs. If this is not addressed, it may impact the sedimentation layer below the inner cylinder 2, affecting the stable settling effect. Therefore, it is necessary to ensure that the volume, weight, and falling speed of the slurry flocs remain consistent as they settle from the lower end of the inner cylinder 2 into the settling area of ​​the thickener. For this reason, in Example 4, if... Figure 8 and Figure 9 As shown, the stabilizing tank with adjustable flocculation state also includes a dispersing and guiding device 7.

[0075] Figure 10 The three-dimensional structure of the dispersing and guiding device 7 is shown, as follows: Figures 8 to 10 As shown, the dispersing and guiding device includes a plurality of blades 71 located at the lower part of the inner cylinder 2 and arranged at intervals around the central axis of the inner cylinder 2. Each blade 71 can be fixedly connected by a connecting shaft 72 that is coaxial with the central axis of the inner cylinder 2 and extends radially toward the tube wall of the inner cylinder 2. Preferably, the outer side of the blade 71 is fixedly connected to the tube wall of the inner cylinder 2.

[0076] Each blade 71 is inclined relative to the horizontal direction, and the angle of attack of the blade 71 is preferably 25° to 35°. The ratio of the included angle between two opposing blade edges of an adjacent blade to the included angle of the adjacent blade is preferably 1 / 3 to 1 / 2. The aforementioned inclined blades 71 with gaps allow the slurry containing flocs to fall downwards in a fan-shaped and diffused manner from each gap, and disperses excessively large flocs through the gaps, further ensuring the uniformity and consistency of the sedimentation components.

[0077] Furthermore, the dispersing and guiding device also includes a guiding cone 73 disposed below the blade 71. The guiding cone 73 is also coaxial with the inner cylinder 2. The guiding cone 73 can further disperse the slurry settling at the outlet of the inner cylinder 2, avoiding direct impact of vertical fluid on the sediment layer at the bottom of the thickener. Preferably, the bottom surface of the guiding cone 73 is lower than the bottom end of the inner cylinder 2, and the distance between the two is greater than or equal to 15cm and less than or equal to 20cm; the diameter of the bottom surface of the guiding cone 73 is greater than or equal to the inner diameter of the inner cylinder 2, and its cone angle φ is in the range of 120° to 150°.

[0078] The upper end of the guide cone 73 can be fixed to the connecting shaft 72. Furthermore, to enhance the connection's strength, it can also be... Figure 8 , Figure 9 As shown, a support structure 74 is provided below the bottom surface of the guide cone 73 to support the guide cone 73. The support structure 74 is reliably connected to the bottom end of the inner cylinder 2 through multiple circumferentially distributed vertical plates and the horizontal circular plate below them.

[0079] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A flow stabilizing tank with adjustable flocculation state, characterized in that, include: The inner cylinder has an open structure at both the top and bottom, forming a through first channel inside; An outer cylinder surrounds the outer cylinder, with its bottom end watertightly connected to the bottom end of the inner cylinder and its top end higher than the top end of the inner cylinder. An annular region between the inner and outer cylinders forms a second channel, the top end of which communicates with the top end of the first channel. The second channel is divided into an annular channel and a spiral groove channel from bottom to top. The spiral groove channel is formed by the inner cylinder, the outer cylinder, and a spiral guide plate. The spiral groove channel is located above the annular channel and communicates with the annular channel. The feed pipe is located at the lower part of the outer cylinder and extends through the outer cylinder; The first filling tube extends through the feed tube from the outside; The second filling tube is located at the lower part of the outer cylinder and extends through the outer cylinder from the outside. The connection between the second filling tube and the outer cylinder is located above the starting point of the spiral groove channel. The portion of the second channel below the connection between the feed pipe and the outer cylinder is an annular channel, and the portion of the second channel above the connection between the feed pipe and the outer cylinder is a spiral groove channel. After entering the outer cylinder, the slurry first slowly rotates and rectifies in the bottom annular space and is fully mixed with the flocculant injected through the first injection pipe. Then, driven by the internal slurry pressure and guided by the spiral guide plate, it enters the spiral groove channel and rises in the opposite direction. After rising along the second channel and entering the first channel, the slurry will settle under its own weight.

2. The flow stabilizing tank with adjustable flocculation state according to claim 1, characterized in that, The feed pipe extends through the outer cylinder along the tangential direction of the outer cylinder.

3. The flow stabilizing tank with adjustable flocculation state according to claim 1, characterized in that: The ratio of the inner diameter of the inner cylinder to the radial width of the second channel is 4:1 to 8:

1.

4. The flow stabilizing tank with adjustable flocculation state according to claim 1, characterized in that, Also includes: The third filling tube penetrates the outer cylinder from the outside, and the penetration position is higher than the top of the inner cylinder.

5. The flow stabilizing tank with adjustable flocculation state according to claim 4, characterized in that: The connection between the third filling pipe and the outer cylinder is located above the end point of the spiral groove channel.

6. The flow stabilizing tank with adjustable flocculation state according to claim 1, characterized in that: It also includes a dispersing and guiding device disposed at the lower part of the inner cylinder.

7. A concentrator, characterized in that, include: The concentration tank has an open top and a conical sedimentation zone at the bottom with a through-hole recovery port. The stabilizing tank with adjustable flocculation state as described in claim 1, wherein the bottom end of the inner cylinder of the stabilizing tank is located inside the concentration tank, and the top end of the stabilizing tank is higher than the top end of the concentration tank.

8. A method for operating a concentrator, characterized in that, The process of concentrating and recovering slurry using the thickener described in claim 7 includes the following steps: S1: Pump the slurry into the outer cylinder through the feed pipe, and add flocculant to the slurry in the feed pipe to make the sludge particles contained therein begin to combine and form flocs; S2, adjust the slurry pumping pressure to change the turbulent flow of the slurry in the second channel from horizontal to spiral flow from bottom to top and gradually reduce the flow velocity, and add flocculant to the slurry in the second channel to further flocculate it; S3, add flocculant to the slurry according to its state when it reaches the top of the second channel, so that the slurry entering the first channel reaches a fully flocculated state; S4, the slurry in a fully flocculated state enters the first channel in a circumferential direction, and the flocs contained therein settle to the sedimentation zone of the concentration tank through the bottom of the first channel under the action of gravity and are recovered through the recovery port.

Images