Reverse-type flow stabilization device, flow stabilization sedimentation method and concentration system

Abstract

The present application provides a reverse-type flow stabilizing device, a flow stabilizing sedimentation method, and a concentration system. The flow stabilizing device includes a feed pipe, a vertical discharge pipe, a reverse feed barrel, and a guide plate. The upper and lower ends of the discharge pipe are both open structures. The barrel wall of the reverse feed barrel is arranged on the outside of the discharge pipe. The lower end of the barrel wall is watertightly connected to the wall of the discharge pipe through the barrel bottom. The upper end of the barrel wall is higher than the upper end of the discharge pipe. The lower part of the barrel wall is provided with a feed port connected to the feed pipe. The guide plate spirally rises and surrounds between the wall of the discharge pipe and the wall of the reverse feed barrel. The flow stabilizing device provided by the present application can effectively stabilize the flow of slurry before it enters the concentration tank of the concentration system, thereby ensuring that the slurry can be fully flocculated and significantly improving the concentration effect.

Description

Technical Field

[0001] This application belongs to the field of thickener technology, and provides a flow stabilizing device with a reverse structure, a flow stabilizing sedimentation method using the flow stabilizing device, and a thickening system including the flow stabilizing device. 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 enters the thickener through a central flow stabilizer or a similar flow stabilizer feeding device, where it is concentrated and settled.

[0003] There are currently known types of steady-flow feeding devices, most of which change the flow direction of the slurry by adjusting the structure. This structural design directly converts kinetic energy through mechanical structure, which generates strong shear force during the conversion process. This can easily break up the flocculent particles and reduce the flocculation effect. At the same time, if the sedimentation layer of the thickener cannot settle sufficiently, the wastewater will impact the sedimentation layer from the central feed tank, affecting the settling effect of the slurry particles in the lower part of the thickener.

[0004] Chinese patent CN103301659A provides a material stabilizing device for a thickener, which drives the slurry to rise through a spiral blade set in the middle cylinder. During the rising process, the slurry is dropped and collides with the rising slurry to achieve mineralization, thereby enhancing the flocculation effect. However, the above structure will cause mutual interference between the rising and falling fluids in the same space, and the resulting turbulence will inevitably affect the flocculation effect of the flocculant. Summary of the Invention

[0005] The purpose of this application is to solve the problems existing in the prior art and to provide a reverse-structure flow stabilizing device, a flow stabilizing sedimentation method using the flow stabilizing device, and a concentration system including the flow stabilizing device.

[0006] The first aspect of this application provides a flow stabilizing device with a reverse structure, including an inlet pipe and a vertical outlet pipe, wherein the upper end and the lower end of the outlet pipe are both open structures;

[0007] The reverse-type flow stabilizing device also includes a reverse feed hopper and a guide plate;

[0008] The barrel wall of the reverse feed barrel is located outside the feed pipe. The lower end of the barrel wall is watertightly connected to the pipe wall of the feed pipe through the bottom of the barrel. The upper end of the barrel wall is higher than the upper end of the feed pipe. The lower part of the barrel wall has an inlet that communicates with the feed pipe.

[0009] The guide plate spirals upwards and surrounds the wall of the feed pipe and the wall of the reverse feed hopper.

[0010] Preferably, the feed pipe is connected to the feed inlet along the tangential direction of the barrel wall.

[0011] Preferably, the lower part of the barrel wall protrudes outward to form a feeding channel with a radial distance that gradually increases from the central axis of the feeding pipe, and the feeding port is located at the end of the feeding channel.

[0012] Preferably, the highest point of the guide plate is not lower than the upper end of the feed tube.

[0013] Preferably, the lowest point of the guide plate is not lower than the upper end of the feed inlet.

[0014] Preferably, the ratio of the diameter of the feed pipe to the radial width of the guide plate is 4:1 to 8:1.

[0015] Preferably, the ratio of the diameter of the feed pipe to the pitch of the guide plate is 4:1 to 8:1.

[0016] Preferably, the ratio of the diameter of the feed inlet to the pitch of the guide plate is 3:1 to 6:1.

[0017] Preferably, the flow stabilizing device with the reverse structure further includes a dispersing disc, which is disposed at the lower part of the feed pipe and includes a plurality of blades arranged at intervals around the central axis of the feed pipe.

[0018] Preferably, the angle of attack of the blade is 25° to 35°.

[0019] Preferably, the ratio of the angle between two opposing leaf edges of adjacent leaves to the angle between adjacent leaves is 1 / 3 to 1 / 2.

[0020] Preferably, the flow stabilizing device with the reverse structure further includes a guide cone, which is coaxially disposed at the lower part of the discharge pipe, and the bottom surface of the guide cone is lower than the lower end of the discharge pipe.

[0021] Preferably, the bottom diameter of the guide cone is greater than or equal to the diameter of the feed pipe.

[0022] Preferably, the distance between the bottom surface of the guide cone and the lower end of the feed tube is 15cm to 25cm.

[0023] Preferably, the cone angle of the guide cone is 15cm to 25cm.

[0024] Preferably, at least one dosing point is provided on the reverse feed tank.

[0025] Preferably, the minimum distance between at least one of the dosing points and the feed inlet is less than 10 cm.

[0026] Preferably, at least one of the dosing points is located above the lowest point of the guide plate;

[0027] Preferably, at least one of the dosing points is located above the highest point of the guide plate.

[0028] Preferably, an opening is provided at the dosing point that extends through the feed pipe and / or the reverse feed tank.

[0029] The second aspect of this application provides a method for steady-flow settling, which uses the aforementioned reverse-type steady-flow device to perform steady-flow settling of slurry, including the following steps:

[0030] Step 1: Pump the slurry into the feed pipe, so that it enters the reverse feed tank tangentially, and then flows spirally upward between the reverse feed tank and the feed pipe along the guide plate. During the flow, by adjusting the pumping pressure, the slurry's kinetic energy is converted into potential energy and chemical energy under the action of pumping pressure, water flow resistance below the liquid surface, fluid gravity and mechanical force of the guide plate, and the slurry changes from a turbulent state to a steady flow state.

[0031] Step 2: After the slurry flows to the highest point of the guide plate, it enters the feed pipe along the circumference of the feed pipe, and then enters the sedimentation zone of the concentration tank of the concentration system under the action of gravity through the lower end of the feed pipe.

[0032] Preferably, the steady-flow settling method further includes the following steps:

[0033] Flocculant is added at the feed inlet, above the lowest point of the guide plate, and above the highest point of the guide plate. The slurry sludge particles combine with the flocculant at the feed inlet to form flocs, and reach a flocculation state at the lowest point of the guide plate.

[0034] Preferably, the steady-flow settling method further includes the following steps:

[0035] Add flocculant according to the state of the slurry above the highest point of the guide plate, so that the slurry reaches a fully flocculated state above the highest point of the guide plate.

[0036] A third aspect of this application provides a concentration system, including a concentration tank and the aforementioned flow stabilizing device with a reverse structure;

[0037] The upper end of the concentration tank is open, the lower end of the feed pipe of the reverse-type flow stabilizing device is located inside the concentration tank, and the upper end of the feed pipe of the reverse-type flow stabilizing device is higher than the upper end of the concentration tank.

[0038] Preferably, the ratio of the diameter of the concentration tank to the diameter of the feed pipe is 6:1 to 8:1.

[0039] Preferably, the height difference between the upper end of the feed pipe and the upper end of the concentration tank is greater than or equal to 20cm.

[0040] The reverse-flow stabilizing device provided in this application achieves the reverse upward movement of the slurry through a reverse feed tank located outside the feed pipe, gradually reducing its kinetic energy before settling. Simultaneously, a spiral guide plate positioned between the reverse flow guide tank and the feed pipe creates a reverse upward channel that guides the slurry flow, effectively preventing flocculated flocs from falling and undergoing secondary separation due to their own weight, and avoiding the resulting turbulence. This reverse-flow stabilizing device ensures the stability of the subsequent settling process, significantly improving slurry settling and concentration effects. Attached Figure Description

[0041] Figure 1 This is a three-dimensional structural schematic diagram of a reverse-type current stabilizing device provided according to some embodiments of this application;

[0042] Figure 2 This is a schematic diagram illustrating the principle of a reverse-structure flow stabilizing device for slurry concentration according to some embodiments of this application;

[0043] Figure 3 A side view of a current stabilizing device with a reverse structure provided according to some embodiments of this application;

[0044] Figure 4 This is a top view of a reverse-structure current stabilizing device provided according to some embodiments of this application;

[0045] Figure 5 This is a half-sectional schematic diagram of a reverse-type flow stabilizing device according to some embodiments of this application;

[0046] Figure 6 This is a schematic diagram illustrating the cooperation between the feed tube and the guide plate in some embodiments of this application;

[0047] Figure 7 The diagram shows the structure of the dispersion disc and the guide cone in some embodiments of this application.

[0048] Figure 8 This is a top view of the dispersing disc and the guide cone in some embodiments of this application;

[0049] Figure 9 This is a top view of a reverse-structure current stabilizing device provided according to some embodiments of this application;

[0050] Figure 10 This is a half-sectional top view of a reverse-type flow stabilizing device according to some embodiments of this application;

[0051] Figure 11 This is a half-sectional top view of a reverse-type flow stabilizing device according to some embodiments of this application;

[0052] Figure 12 This is a cross-sectional schematic diagram of a reverse-type current stabilizing device according to some embodiments of this application;

[0053] Figure 13 This is a three-dimensional structural schematic diagram of a reverse-type current stabilizing device provided according to some embodiments of this application;

[0054] Figure 14 This is a top view of a reverse-structure current stabilizing device provided according to some embodiments of this application;

[0055] Figure 15 This is a schematic flowchart of a steady-flow sedimentation method provided according to some embodiments of this application.

[0056] Numbers in the diagram

[0057] Feed pipe 10, bend pipe 11, discharge pipe 20, dispersion disc 30, blade 31, connecting shaft 32, guide cone 40, reverse feed tank 5, tank wall 51, tank bottom 52, feed inlet 53, feed channel 54, tank cover 55, guide plate 60, starting end of guide plate 601, ending end of guide plate 602, reverse rising channel 61, first opening 621, second opening 622, third opening 623, first dosing pipe 710, second dosing pipe 720, third dosing pipe 730, bottom plate 81, vertical plate 82, reverse type flow stabilizing device 910, concentration tank 920. Detailed Implementation

[0058] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0059] 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.

[0060] Singular forms of words also include plural meanings, and vice versa.

[0061] 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.

[0062] 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.

[0063] As analyzed in the background section, equipment such as thickeners used for concentrating slurry needs to ensure that the slurry undergoing sedimentation is in a fully flocculated state. Therefore, a flow stabilizing device is generally required before the slurry enters the sedimentation chamber. An ideal flow stabilizing device not only needs to reduce the kinetic energy of the slurry at the inlet and mitigate turbulence to provide a favorable environment for flocculant action, but also needs to maintain the stability of its flow direction and velocity as much as possible during the slurry's movement to avoid mutual interference between components of different weights and volumes before they settle through the feed pipe.

[0064] To achieve the above objectives, this application provides a current stabilizing device with a reverse structure. Figure 1 A three-dimensional structural schematic diagram of the reverse-type current stabilizing device is shown in some preferred embodiments. Figure 2 This is a schematic diagram illustrating the principle of using this reverse-type flow stabilizing device in thickeners and other thickening systems to achieve slurry concentration. Figure 3 , 4 The side view (with its internal structure shown in dashed lines) and top view of the reverse-type flow stabilizing device are further shown.

[0065] like Figures 1 to 4As shown, the reverse-type flow stabilizing device includes an inlet pipe 10, a discharge pipe 20, a reverse-feeding barrel 5, and a guide plate 60. The discharge pipe 20 is a cylindrical pipe of a certain thickness, arranged vertically, with open ends at both the upper and lower ends. The barrel wall 51 of the reverse-feeding barrel 5 is located outside the discharge pipe 20. The lower end of the barrel wall 51 is watertightly connected to the wall of the discharge pipe 20 via a barrel bottom 52. The upper end of the barrel wall 51 is higher than the upper end of the discharge pipe 20, thus forming a space to accommodate and guide the slurry flow through the vertical wall of the discharge pipe 20, the barrel wall 51 of the reverse-feeding barrel 5, and the barrel bottom 52. In some embodiments, the upper part of the barrel wall 51 of the reverse-feeding barrel 5 has a cylindrical structure similar to that of the discharge pipe 20 and is coaxially arranged with the discharge pipe 20. Figure 3 and Figure 4 As shown, the diameter of the upper part of the reverse feed barrel 5 is D1, and the diameter of the feed pipe 20 is D2 (generally, the wall thickness of the reverse feed barrel 5 and the feed pipe 20 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 upper part of the barrel wall 51 of the reverse feed barrel 5 and the feed pipe 20 is L1 = (D2 - D1) / 2.

[0066] Furthermore, an inlet 53 connected to the feed pipe 10 is provided at the lower part of the reverse feed tank 5. The inlet 53 can be connected to the feed pipe 10 through a flange. The feed pipe 10 receives the slurry pumped in by the slurry pump directly or through an extension pipe such as a bend 11, and then introduces it into the reverse feed tank 5 through the inlet 53. The slurry gradually rises to the upper end of the discharge pipe 20. During the rising process, the slurry's kinetic energy continuously weakens under its own gravity and the resistance of the water flow below the liquid surface, thereby ensuring that the slurry and the added flocculant react fully to form larger flocs as much as possible and effectively improve the flocculation effect. After the slurry reaches the upper end of the discharge pipe 20, it enters the discharge pipe 20 and settles from the upper end to the lower end of the discharge pipe 20 under the action of gravity, and continues to settle from the lower end of the discharge pipe 20 to the sedimentation layer of the thickening system.

[0067] To ensure that the slurry rises in reverse between the feed pipe 20 and the wall 51 of the reverse feed tank 5, it is generally necessary to maintain the pressure when the slurry enters the inlet 53. However, increasing the pressure at this point will exacerbate the turbulence of the slurry at the bottom of the reverse feed tank 5. If the pressure at the inlet 53 is reduced, not only will the processing efficiency be reduced, but it may also cause the larger flocs that have already solidified to fall vertically when the slurry rises to the top of the reverse feed tank 5, resulting in turbulence at the top of the reverse feed tank 5. The causes of the turbulence occurring at the bottom and top of the reverse feed tank 5 are different. Obviously, it is difficult to solve the above problems simultaneously by simply adjusting the pressure at the inlet 53.

[0068] Therefore, in the embodiments of this application, such as Figure 3 , Figure 4As shown, a spirally rising guide plate 60 is provided between the pipe wall of the discharge pipe 20 and the barrel wall 51 of the reverse feed barrel 5. The guide plate 60 can be made of wear-resistant metal or other materials, and its two sides are continuously fixedly connected to the outer side of the pipe wall of the discharge pipe 20 and the inner side of the barrel wall 51 of the reverse feed barrel 5 by welding, riveting or other methods.

[0069] Figure 5 This is a half-section schematic diagram of the current stabilizing device with the reverse structure (the cutting line is...). Figure 4 (CC line in the middle) Figure 6 This is a schematic diagram showing the connection between the feed pipe 20 and the guide plate 60. The rotating arrow in the diagram indicates the direction of slurry flow. Figure 5 As shown, through the aforementioned guide plate 60 structure, a spiral-shaped reverse upward channel 61 is formed between the pipe wall of the feed pipe 20 and the barrel wall 51 of the reverse feed barrel 5. This reverse upward channel 61 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 reverse feed barrel 5, but also, because the upper and lower layers of the reverse upward channel 61 are isolated from each other by the guide plate 60, the slurry and the flocs generated by slurry flocculation can only rise in reverse under the push of the slurry pump, thereby effectively avoiding the turbulence caused by the direct fall of large flocs at the top of the reverse feed barrel 5, and avoiding the secondary disintegration of flocs due to falling during the reverse upward process.

[0070] In some preferred embodiments, such as Figure 1 , Figure 4 , Figure 5 As shown in the figure, the lower part of the barrel wall 51 forms an outwardly protruding inlet channel 54 with a gradually increasing radial distance from the central axis of the feed pipe 20. This increasing trend can be constructed in an involute or spiral pattern. The feed inlet 53 is located at the end of the feed channel 54, and the feed pipe 10 is connected to the feed inlet 53 along the tangential direction of the barrel wall 51. Figure 5 As shown, by utilizing the feed channel 54 formed by the aforementioned outward protrusion, the flow cross-section of the slurry near the feed inlet 53 is greater than the flow cross-section of the reverse upward channel 61. Therefore, after the slurry enters the reverse feed tank 5, it can first rotate slowly in the larger bottom space, and then enter the spiral reverse upward channel 61 under the push of the internal slurry pressure and the guidance of the guide plate 60. The above structure can effectively rectify the slurry entering the reverse feed tank 5, thereby further reducing the turbulence phenomenon at the bottom of the reverse feed tank 5.

[0071] like Figure 5 As shown, the starting end 601 of the guide plate is the lowest point of the guide plate 60, and the ending end 602 of the guide plate is the highest point of the guide plate 60. In some preferred embodiments, such as... Figure 5As shown, the height of the starting end 601 of the guide plate is not lower than the top of the feed channel 54, that is, the lowest point of the guide plate 60 is not lower than the upper end of the feed inlet 53, so that the slurry first rotates along the outer surface of the feed pipe 20 after entering the reverse feed bucket 5, and then enters the reverse rising channel 61 along the guide plate 60.

[0072] To optimize the flow stabilization effect of the guide plate 60 and the reverse upward channel 61, the width, slope, and slurry flow rate at various locations of the guide plate 60 need to be optimized. Therefore, in some preferred embodiments, the ratio of the diameter D2 of the feed pipe 20 to the radial width (obviously, L1) of the guide plate 60 is 4:1 to 8:1. In other preferred embodiments, the ratio of the diameter of the feed pipe 20 to the pitch L2 of the guide plate 60 is 4:1 to 8:1. In still other preferred embodiments, the ratio of the diameter of the inlet 53 to the pitch of the guide plate 60 is 3:1 to 6:1. Through these settings, a stable reverse flow of the slurry can be achieved while ensuring the slurry flow rate per unit time, balancing the slurry processing speed and effect.

[0073] After the slurry rises along the reverse upward channel 61 and enters the feed pipe 20, 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 these flocs are not treated, they may impact the sedimentation layer below the feed pipe 20, affecting the stable settling effect. Therefore, it is important to ensure that the volume, weight, and falling speed of the slurry flocs remain consistent as they settle from the lower end of the feed pipe 20. For this purpose, in some preferred embodiments of this application, such as... Figure 5 As shown in the figure, the flow stabilizing device with the reverse structure also includes a dispersing disk 30 and a guide cone 40.

[0074] Figure 7 and Figure 8 Schematic diagrams and top views of the dispersing disc 30 and the guide cone 40 in some preferred embodiments are shown respectively. The dispersing disc 30 is generally disposed at the lower part of the feed pipe 20, such as... Figure 7 The device shown consists of multiple blades 31 arranged at intervals around the central axis of the feed tube 20. Each blade 31 is fixedly connected by a connecting shaft 32 that is coaxial with the central axis of the feed tube 20 and extends radially into the wall of the feed tube 20. Preferably, the outer side of the blade 31 is fixedly connected to the wall of the feed tube 20.

[0075] Furthermore, each blade 31 is inclined relative to the horizontal direction, and the angle of attack of the blade 31 is 25° to 35°, such as... Figure 8As shown, the ratio of the included angle θ2 between two opposing blade edges of adjacent blades to the included angle θ1 between adjacent blades is 1 / 3 to 1 / 2. The aforementioned inclined blades 31 with gaps allow the slurry containing flocs to fall downwards in a fan-shaped, inclined, and diffused manner from each gap, and disperses excessively large flocs through the gaps, further ensuring the uniformity and consistency of the sedimentation components.

[0076] Furthermore, such as Figure 7 As shown, in some preferred embodiments of this application, a guide cone 40 is also provided below the dispersing disc 30. The guide cone 40 is also coaxial with the feed pipe 20, and its bottom surface is lower than the lower end of the feed pipe 20. In some preferred embodiments, the distance between the bottom surface of the guide cone 40 and the lower end of the feed pipe 20 is greater than or equal to 15 cm and less than or equal to 20 cm; in other preferred embodiments, the bottom diameter of the guide cone 40 is greater than or equal to the inner diameter of the feed pipe 20, and its cone angle φ ranges from 120° to 150°. The guide cone 40 can further disperse the slurry settling at the outlet of the feed pipe 20, avoiding direct impact of vertical fluid on the sediment layer at the bottom of the thickener.

[0077] In some alternative embodiments, such as Figure 7 As shown, the upper end of the guide cone 40 can be fixed to the connecting shaft 32. In some alternative embodiments, to enhance the strength of the connection, it can also be as follows: Figure 1 , Figure 5 As shown in the figure, a base plate 81 supporting the guide cone 40 is provided below the bottom surface of the guide cone 40, and is connected to the lower end of the feed pipe 20 through multiple circumferentially distributed vertical plates 82.

[0078] During the flow of the slurry from the feed pipe 10 to the reverse feed tank 5 and then to the discharge pipe 20, it successively rises and falls horizontally and in a rotating manner. During the above process, the flow rate and flow state of the slurry change continuously. In order to achieve the ideal flocculation state when the slurry settles at the bottom of the discharge pipe 20 and falls into the thickening tank 920, in some preferred embodiments, multiple dosing points are provided on the reverse feed tank 5 for adding flocculant at different locations.

[0079] Various alternative implementation methods can be used to add flocculants at the dosing points. For example, a pipe for adding flocculants can be pre-embedded in the wall of the reverse feed tank 5, and openings can be provided at each dosing point. Alternatively, a through opening can be provided on the feed pipe 10 and / or the reverse feed tank 5, and a pipe with a one-way valve or similar structure can be inserted into the opening to add flocculants.

[0080] Figure 9 , Figure 10The first opening 621, the second opening 622, and the third opening 623 respectively provided at the feed channel 54, the lower part and the upper part of the reverse feed barrel 5 are shown in some preferred embodiments. Figure 11 , Figure 12 (The cutting line is) Figure 9 (FF line in the middle) and Figure 13 The image shows a first dosing tube 710, a second dosing tube 720, and a third dosing tube 730, which are respectively installed at three openings.

[0081] Preferably, the first opening 621 is located near the edge of the feed inlet 53, with a distance of less than 10cm from the feed inlet 53; the second opening 622 is located above the starting end 601 of the guide plate; and the third opening 623 is located above the ending end 602 of the guide plate. Meanwhile, if... Figure 12 As shown, the height of the end 602 of the guide plate exceeds the upper end of the feed pipe 20, or is flush with the upper end of the feed pipe 20, that is, the highest point of the guide plate 60 is not lower than the upper end of the feed pipe 20, so that the slurry rising to the top of the feed pipe 20 can smoothly enter the feed pipe 20.

[0082] The locations of the three dosing points correspond to the flow velocity and flow state of the slurry at different locations. The dosing point corresponding to the first opening 621 is closest to the slurry pump, where the slurry flow velocity is fastest and the flow state is most unstable. Adding flocculant here allows for thorough and uniform mixing with the slurry, initiating flocculation of the particles within the slurry. The dosing point corresponding to the second opening 622 is located at the lower part of the reverse feed tank 5 and above the reverse upward channel 61. After the slurry enters the reverse feed tank 5, it first rotates at its lower part, gradually regularizing the flow. Simultaneously, under pressure... The slurry spirals upwards and enters the reverse upward channel 61. After flocculant is added at this point, as the slurry's speed gradually decreases during its upward rotation, turbulence weakens, the flocculation effect strengthens, and the flocs grow more uniformly. The dosing point corresponding to the third opening 623 is located at the end of the reverse upward channel 61. Here, the slurry flows circumferentially into the feed pipe 20 and enters the settling process. Ideally, the slurry should flow smoothly and slowly horizontally at this point, with fully flocculated particles and a relatively uniform floc size distribution, thus achieving regular and consistent settling under gravity. By adding flocculant at this point, the amount of flocculant added can be adjusted according to the slurry's flow state and the size and distribution of the flocs during the transition from reverse upward movement to gravity settling, so that the slurry reaches the ideal flocculation state.

[0083] Figure 13 Another alternative embodiment of the current stabilizing device with this reverse structure is also shown, such as... Figure 13As shown, in this embodiment, the top of the reverse feed tank 5 is an open structure, which allows for convenient monitoring of the flow of slurry at the top of the feed pipe 20.

[0084] Figure 14 A top view of another alternative embodiment of the current stabilizing device with this reverse structure is shown, such as... Figure 14 As shown, in this embodiment, the upper and lower parts of the barrel wall 51 of the reverse feed barrel 5 maintain the same size, and no protrusion is formed in the lower part. This structure is suitable for situations where there are certain restrictions on the installation size of the equipment.

[0085] Figure 15 The flowcharts of some embodiments of the present application provide a stabilization and settling method for slurry, which uses the above-described reverse-type stabilization device for slurry stabilization and settling. Figure 15 As shown, the steady-flow sedimentation method includes the following steps:

[0086] Step 100: Pump the slurry into the feed pipe so that it enters the reverse feed tank tangentially, and then flows spirally upward between the reverse feed tank and the feed pipe along the guide plate. During the flow, by adjusting the pumping pressure, the slurry's kinetic energy is converted into potential energy and chemical energy under the action of the pumping pressure, the water flow resistance below the liquid surface, the fluid gravity, and the mechanical force of the guide plate, and the slurry changes from a turbulent state to a steady flow state.

[0087] Step 200: After the slurry flows to the highest point of the guide plate, it enters the feed pipe along the circumference of the feed pipe, and then enters the sedimentation zone of the concentration tank of the concentration system under the action of gravity through the lower end of the feed pipe.

[0088] In some preferred embodiments, the steady-flow settling method further includes the following steps:

[0089] Flocculant is added at the feed inlet, above the lowest point of the guide plate, and above the highest point of the guide plate. The slurry sludge particles combine with the flocculant at the feed inlet to form flocs, and reach a flocculation state at the lowest point of the guide plate.

[0090] In some preferred embodiments, the steady-flow settling method further includes the following steps:

[0091] Add flocculant according to the state of the slurry above the highest point of the guide plate, so that the slurry reaches a fully flocculated state above the highest point of the guide plate.

[0092] As mentioned above, Figure 2 A concentration system according to some preferred embodiments of this application is provided for concentrating slurry, the concentration system including a concentration tank 920 and the aforementioned flow stabilizing device 910 with a reverse structure.

[0093] Furthermore, the upper end of the concentration tank 920 has an open structure, and the lower end of the discharge pipe of the reverse-flow stabilizing device 910 is located inside the concentration tank 920 (in use, the liquid level inside the concentration tank 910 is higher than the lower end of the discharge pipe). Preferably, the height difference between the upper end of the discharge pipe and the upper end of the concentration tank 920 is greater than or equal to 20 cm. The upper end of the discharge pipe is higher than the upper end of the concentration tank 920. In some preferred embodiments, the ratio of the diameter of the concentration tank 920 to the diameter of the discharge pipe is 6:1 to 8:1.

[0094] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications can be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A flow stabilizing device with a reverse structure, comprising an inlet pipe and a vertical outlet pipe, wherein the upper and lower ends of the outlet pipe are both open, characterized in that: It also includes a reverse feed hopper and guide plate; The wall of the reverse feeding barrel is located outside the feeding pipe. The lower end of the barrel wall is watertightly connected to the wall of the feeding pipe through the bottom of the barrel. The upper end of the barrel wall is higher than the upper end of the feeding pipe. The lower part of the barrel wall has an inlet that communicates with the feeding pipe. The lower part of the barrel wall protrudes outward to form a feeding channel with a radial distance that gradually increases from the central axis of the feeding pipe. The inlet is located at the end of the feeding channel, and the feeding pipe communicates with the inlet along the tangential direction of the barrel wall. The guide plate spirals upwards and surrounds the wall of the feed pipe and the wall of the reverse feed barrel. Its two sides are continuously and fixedly connected to the outer side of the feed pipe wall and the inner side of the reverse feed barrel wall, respectively, thereby forming a spiral reverse upward channel that is isolated between the upper and lower layers. The lowest point of the guide plate is not lower than the upper end of the feed inlet. After the slurry enters the reverse feed bucket, it is first rectified in the bottom space by rotating along the outer surface of the feed pipe. Then, under the push of the internal slurry pressure and the guidance of the guide plate, it enters the spiral reverse upward channel. A plurality of dosing points are provided on the reverse feed hopper, at least one of the dosing points being located above the lowest point of the guide plate and at least one of the dosing points being located above the highest point of the guide plate.

2. The current stabilizing device with a reverse structure according to claim 1, characterized in that: The highest point of the guide plate is not lower than the upper end of the feed tube.

3. The current stabilizing device with a reverse structure according to claim 1, characterized in that: The ratio of the diameter of the feed pipe to the radial width of the guide plate is 4:1 to 8:

1.

4. The current stabilizing device with a reverse structure according to claim 1, characterized in that: The ratio of the diameter of the feed pipe to the pitch of the guide plate is 4:1 to 8:

1.

5. The current stabilizing device with a reverse structure according to claim 1, characterized in that: The ratio of the diameter of the feed inlet to the pitch of the guide plate is 3:1 to 6:

1.

6. The current stabilizing device with a reverse structure according to claim 1, characterized in that: It also includes a dispersing disc, which is disposed at the lower part of the feed pipe and includes a plurality of blades arranged at intervals around the central axis of the feed pipe.

7. The current stabilizing device with a reverse structure according to claim 1, characterized in that: It also includes a guide cone, which is coaxially disposed at the lower part of the feed tube, and the bottom surface of the guide cone is lower than the lower end of the feed tube.

8. The current stabilizing device with a reverse structure according to claim 1, characterized in that: At least one of the dosing points is less than 10 cm away from the feed inlet.

9. The current stabilizing device with a reverse structure according to claim 8, characterized in that: An opening is provided at the dosing point that connects to the feed pipe and / or the reverse feed tank.

10. A method for steady-flow settling, using the reverse-type steady-flow device as described in claim 1 for steady-flow settling of slurry, characterized in that, Includes the following steps: Step 1: Pump the slurry into the feed pipe, so that it enters the reverse feed tank tangentially, and then flows spirally upward between the reverse feed tank and the feed pipe along the guide plate. During the flow, by adjusting the pumping pressure, the slurry's kinetic energy is converted into potential energy and chemical energy under the action of pumping pressure, water flow resistance below the liquid surface, fluid gravity and mechanical force of the guide plate, and the slurry changes from a turbulent state to a steady flow state. Step 2: After the slurry flows to the highest point of the guide plate, it enters the feed pipe along the circumference of the feed pipe, and then enters the sedimentation zone of the concentration tank of the concentration system under the action of gravity through the lower end of the feed pipe.

11. The steady-flow sedimentation method according to claim 10, characterized in that, It also includes the following steps: Flocculant is added at the feed inlet, above the lowest point of the guide plate, and above the highest point of the guide plate. The slurry sludge particles combine with the flocculant at the feed inlet to form flocs, and reach a flocculation state at the lowest point of the guide plate.

12. The steady-flow sedimentation method according to claim 11, characterized in that, It also includes the following steps: Add flocculant according to the state of the slurry above the highest point of the guide plate, so that the slurry reaches a fully flocculated state above the highest point of the guide plate.

13. A concentration system, comprising a concentration tank, characterized in that, It also includes a current stabilizing device with a reverse-type structure as described in claim 1; The upper end of the concentration tank is open, the lower end of the feed pipe of the reverse-type flow stabilizing device is located inside the concentration tank, and the upper end of the feed pipe of the reverse-type flow stabilizing device is higher than the upper end of the concentration tank.

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