Efficient aggregate thickener

Abstract

The utility model provides an efficient aggregate thickener. The efficient aggregate thickener comprises a tank body, a feeding unit, a driving unit and a stirring unit, the tank body comprises a straight cylinder part, a conical part and a material collecting barrel which are coaxially arranged from top to bottom; the feeding unit is fixedly arranged at the upper part of the tank body, and the bottom end of the feeding unit is lower than the top end of the tank body; the driving unit comprises a motor and a driving shaft, the motor is fixedly arranged above the feeding unit, the upper end of the driving shaft is fixedly connected with a motor shaft of the motor, and the other end of the driving shaft is kept coaxial with the tank body, extends downwards and penetrates through the feeding unit; the stirring unit is arranged below the feeding unit and comprises a first harrow frame and a second harrow frame which are alternately distributed around the driving shaft, the first harrow frame comprises a plurality of first scraping plates, the second harrow frame comprises a plurality of second scraping plates, and the radial distance between the first scraping plate on the outermost side and the driving shaft is larger than that between the second scraping plate on the outermost side and the driving shaft. The thickener provided by the utility model can realize efficient collection of sediment materials.

Description

Technical Field

[0001] The present application relates to the technical field of solid-liquid separation equipment, and in particular, provides a high-efficiency aggregate thickener. Background Art

[0002] A thickener is a device used for solid-liquid separation, typically consisting of a thickening tank, a feed device, a stirring device, a clear water discharge device, and a concentrated material discharge device. By stirring the suspended liquid within the thickening tank, solid particles aggregate and settle to the bottom, forming a concentrate; simultaneously, the supernatant overflows from the top, achieving solid-liquid separation. A thickener can efficiently process large amounts of liquid containing suspended solid particles, making it a crucial piece of solid-liquid separation equipment in many industrial processes. It is currently widely used in mining, metallurgy, chemical engineering, and other fields.

[0003] The tank of the thickener generally adopts the form of an annular straight cylinder connected to a conical cylinder below to achieve the aggregation of sediment. At the same time, the material settled to the bottom of the conical cylinder is continuously swept into the aggregate cylinder by a stirring device such as a rake. In order to avoid material omission, the radial length of the existing rake is generally set to be close to the inner diameter of the straight cylinder. However, since the settled slurry is not evenly distributed at the bottom of the conical cylinder when it settles near the center axis of the tank, there are obvious differences in the sediment accumulation speed in various areas. If the stirring and aggregation structure cannot be designed according to the characteristics of sediment accumulation at the bottom of the tank, not only will it be impossible to achieve efficient aggregation, but the scale and weight of the rake and its supporting structure will also increase, resulting in unnecessary energy consumption. Utility Model Content

[0004] The purpose of this application is to provide a high-efficiency aggregate thickener to solve the problems existing in the above-mentioned prior art.

[0005] The embodiments of the present application can be implemented through the following technical solutions:

[0006] A high-efficiency aggregate thickener, comprising a tank body, a feeding unit, a driving unit and a stirring unit; the feeding unit is fixedly arranged on the upper part of the tank body, and the bottom end of the feeding unit is lower than the top end of the tank body; the driving unit comprises a motor and a driving shaft, the motor is fixedly arranged above the feeding unit, the upper end of the driving shaft is fixedly connected to the motor shaft of the motor, and the other end extends downward coaxially with the tank body and passes through the feeding unit; the stirring unit is arranged below the feeding unit, and comprises a first rake and a second rake alternately distributed around the driving shaft, the first rake comprising a plurality of first scrapers arranged radially, the second rake comprising a plurality of second scrapers arranged radially, and the radial distance between the outermost first scraper and the driving shaft is greater than the radial distance between the outermost second scraper and the driving shaft.

[0007] Furthermore, the tank body includes a straight cylindrical portion, a tapered portion and a material collecting barrel coaxially arranged from top to bottom, an overflow trough and an overflow pipe are provided at the top end of the straight cylindrical portion, and a discharge pipe is provided at the bottom end of the material collecting barrel.

[0008] Furthermore, the first rake frame also includes a first supporting structure, which is fixedly connected to the drive shaft, extends radially outward from the central axis of the tank body, and is synchronously tilted upward with the bottom of the conical portion, and the multiple first scrapers are arranged below the first supporting structure; the second rake frame also includes a second supporting structure, which is fixedly connected to the drive shaft, extends radially outward from the central axis of the tank body, and is synchronously tilted upward with the bottom of the conical portion, and the multiple second scrapers are arranged below the second supporting structure; the radial length of the first supporting structure is greater than the radial length of the second supporting structure.

[0009] Furthermore, the first rake frame further includes a first reinforcement structure fixedly connected to the drive shaft and the first supporting structure, and the second rake frame further includes a second reinforcement structure fixedly connected to the drive shaft and the second supporting structure.

[0010] Furthermore, the number of first scrapers provided on the first supporting structure is greater than the number of second scrapers provided on the second supporting structure.

[0011] Furthermore, the extension direction of the first scraper forms a non-zero first angle with the extension direction of the first supporting structure; the extension direction of the second scraper forms a non-zero second angle with the extension direction of the second supporting structure.

[0012] Furthermore, each of the first angles is the same or different, and each of the second angles is the same or different.

[0013] Furthermore, the radial distance between the outermost first scraper on the first rake frame and the drive shaft is greater than or equal to 0.95 times the inner radius of the straight cylindrical portion of the tank body.

[0014] Furthermore, the cone angle of the conical portion ranges from 9 to 30 degrees, and the ratio of the radial distance L1 between the outermost first scraper of the first rake and the drive shaft to the radial distance L2 between the outermost second scraper of the second rake and the drive shaft ranges from 1.5 to 2.5.

[0015] An embodiment of the present application provides a high-efficiency aggregate thickener having at least the following beneficial effects: the present application can better achieve high-efficiency aggregate thickener and save energy through the design of the rake structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic structural diagram of a high-efficiency aggregate thickener provided according to an embodiment of the present application;

[0017] Figure 2 A side view of a high-efficiency aggregate thickener provided according to an embodiment of the present application;

[0018] Figure 3 AA line sectional view of a high-efficiency aggregate thickener provided according to an embodiment of the present application;

[0019] Figure 4 for Figure 3 Enlarged schematic diagram of the middle circle I;

[0020] Figure 5 This is a schematic diagram of the working of the stirring unit in the embodiment of the present application;

[0021] Numbers in the figure

[0022] Tank body 1, straight cylindrical portion 11, tapered portion 12, collecting bucket 13, discharge pipe 131, overflow trough 14, overflow pipe 141, feeding unit 2, drive unit 3, motor 31, drive shaft 32, stirring unit 4, first rake 41, first supporting structure 411, radial support rod 4111, cross bar 4112, first reinforcement structure 412, radial reinforcement rod 4121, transverse reinforcement rod 4122, first scraper 413, connecting piece 4131, second rake 42, second supporting structure 421, second reinforcement structure 422, second scraper 423, step ladder 51, maintenance channel 52, bracket 6, extension pipe 7; DETAILED DESCRIPTION

[0023] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.

[0024] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the products of the embodiments of the present application are usually placed when in use, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, in order to distinguish different units, words such as first and second are used in this specification, but these are not limited by the order of manufacture, nor can they be understood as indicating or implying relative importance. Their names may be different in the detailed description and claims of the present application. In addition, for ease of understanding, various components on the drawings are enlarged or reduced, but this practice is not intended to limit the scope of protection of the present application.

[0025] The vocabulary in this specification is used to illustrate the embodiments of the present application, but is not intended to limit the present application. It should also be noted that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a communication between the two components. For those skilled in the art, the specific meanings of the above terms in this application can be specifically understood.

[0026] This application provides a high-efficiency aggregate thickener. Figure 1 FIG. 1 shows a schematic structural diagram of the thickener in some preferred embodiments. Figure 2 and Figure 3 The side view and cross-sectional view thereof are shown respectively, Figure 4 right Figure 3 The portion within the middle circle I is shown enlarged.

[0027] like Figures 1 to 3 As shown, the thickener includes a coaxially arranged tank body 1, a feeding unit 2, a driving unit 3 and a stirring unit 4.

[0028] Among them, the tank body 1 can be made of corrosion-resistant plates, such as metal plates coated with waterproof and anti-corrosion coatings, which includes a straight cylindrical portion 11, a conical portion 12 and a collection barrel 13, wherein the straight cylindrical portion 11 is surrounded by a circular side wall, its upper end is open, and the lower end is watertightly connected to the upper end of the conical portion 12, the conical portion 12 gradually shrinks from top to bottom, and finally is watertightly connected to the top of the collection barrel 13, and a through discharge port 131 is opened on the barrel wall of the collection barrel 13 for discharging the concentrated solid material.

[0029] Furthermore, an overflow trough 14 is provided at the top end of the straight cylindrical portion 11. The overflow trough 14 can be formed by bending the bottom and inner groove wall of the same plate, and directly using the straight cylindrical portion 11 as its outer groove wall, and watertightly connected by welding or the like. At the same time, an overflow port 141 is opened at the upper end of the straight cylindrical portion. The clarified liquid in the tank body 1 enters the overflow trough 14 as the liquid level rises, and is finally discharged through the overflow port 141.

[0030] The feeding unit 2 is used to introduce the slurry that needs to be separated into solid and liquid into the tank body 1. The bottom end of the feeding unit 2 is lower than the top of the straight cylindrical portion 11. One end of the extension tube 7 extends beyond the straight cylindrical portion 11 and is connected to the feeding pump and other devices through a flange. The other end is connected to the feeding unit 2, thereby transporting the slurry to the feeding unit 2; the specific structure of the feeding unit 2 of the present application can adopt the structure in the prior art, such as the structure described in Patent 202410241642.4, which will not be repeated here.

[0031] The drive unit 3 is used to drive the stirring unit 4 to achieve the concentration of the solid components in the settled slurry. The drive unit 3 includes a motor 31 and a drive shaft 32. Preferably, the motor 31 is arranged above the feeding unit 2, and its motor shaft is fixedly connected to the drive shaft 32 and remains coaxial with the tank body 1. In some preferred embodiments, as shown in the figure, the drive shaft 32 passes through the feeding unit 2 and extends into the collection barrel 13.

[0032] The stirring unit 4 is arranged below the feeding unit 2 and rotates around the central axis of the tank body 1 driven by the driving shaft 32, thereby stirring the slurry at the bottom of the straight cylindrical part 11 and scraping the solid material settled to the bottom of the conical part 12 into the collecting barrel 13.

[0033] In some preferred embodiments, the diameter of the concentrator tank can be greater than or equal to 20m, and its bottom is supported and fixed by a bracket 6, such as Figure 1 、 Figure 2 As shown, the bracket 6 can be formed by connecting various horizontal and vertical matching connecting rods and other structures known to those skilled in the art. In addition, other forms of support plates, columns, etc. can also be used. The implementation method of the above-mentioned support structure is already known to those skilled in the art and will not be repeated here.

[0034] In some specific embodiments, the feed unit is further provided with a plurality of dosing pipes, which are connected to the interior of the feed unit through a through opening. The dosing pipes are generally provided with a one-way valve or other structure for adding flocculants.

[0035] In order to facilitate the monitoring and maintenance of each unit of the concentrator, as well as the addition of flocculants, Figures 1 to 4 As shown, a step ladder 51 is installed on the outer wall of the straight cylinder portion 11, and an inspection channel 52 is provided at the top of the straight cylinder portion 11. The inspection channel 52 can be entered through the step ladder 51, thereby realizing the inspection and maintenance of equipment such as the motor 31 and the feeding unit 2, as well as the addition of flocculants and other operations.

[0036] like Figure 3 and Figure 4 and Figure 5 As shown, in the embodiment of the present application, the stirring unit 4 includes a first rake 41 and a second rake 42 alternately distributed around the drive shaft 32. Figure 3 and Figure 4 In the illustrated embodiment, the mixing unit 4 includes two first rake frames 41 and two second rake frames 42, and adjacent first rake frames 41 and second rake frames 42 are perpendicular to each other. In addition, in other embodiments, the number of first rake frames 41 and second rake frames 42 can be increased or decreased at the same time, for example, one, three, four or more first rake frames 41 and the same number of second rake frames 42.

[0037] Specifically, if Figure 3 、 Figure 4 As shown, the first rake frame 41 includes a first supporting structure 411 and a first reinforcing structure 412, wherein the first supporting structure 411 includes two radial support rods 4111 parallel to each other, and a plurality of cross rods 4112 connected between the two radial support rods 4111, the radial support rod 4111 is fixedly connected to the drive shaft 32, extends radially outward from the central axis of the tank body 1, and is tilted upward synchronously with the bottom of the tapered portion 12; accordingly, the first reinforcing structure 412 includes a radial reinforcing rod 4121 and a plurality of transverse reinforcing rods 4122, the radial reinforcing rod 4121 is located above the radial support rod, is fixedly connected to the drive shaft 32, extends radially outward from the central axis of the tank body 1 while gradually tilting downward, and is finally fixedly connected to the cross rod 4112, and the transverse reinforcing rod 4122 is fixedly connected to the radial support rod 4111 and the radial reinforcing rod 4121 at the same time. A plurality of triangular support structures are formed through the above structure, thereby greatly enhancing the strength of the stirring unit 4.

[0038] Further, if Figure 3 and Figure 4 As shown, a plurality of first scrapers 413 are provided below the first support structure 411, and two connecting members 4131 are fixedly connected to the two radial support rods 4111 respectively, and the distances of the connection positions from the central axis of the tank body 1 are different. The two positioning pins above the first scraper 413 pass through the two connecting members 4131 respectively and are firmly positioned, thereby being fixedly connected to the radial support rods 4111 and forming a non-zero angle with the extension direction of the radial support rods 4111. By utilizing the angle between the first scraper 413 and the radial support rods 4111, the sediment can be gradually pushed toward the aggregate bucket 13 when the first support structure 411 rotates around the central axis of the tank body 1.

[0039] Figure 4 In the illustrated embodiment, the two locating pins above the first scraper 413 are integrally formed with the scraper and have the same spacing. Accordingly, the first angle formed by the extension direction of each first scraper 413 and the extension direction of the radial support rod 4111 (that is, the extension direction of the first support structure 411) is the same; in other preferred embodiments, the locating pins can also be configured to be movably connected to the first scraper 413. When installing the scraper, the spacing between the two locating pins above each first scraper 413 can be determined based on the actual aggregate effect of each scraper, so that the first angle between each first scraper 413 and the radial support rod 4111 can be independently adjusted to achieve the optimal aggregate effect. In addition, in other preferred embodiments, the appropriate number of first scrapers 413 and the radial distance between each first scraper 413 can also be selected based on the actual aggregate effect.

[0040] The above describes in detail the specific implementation of the first support structure 411, the first reinforcement structure 412 and the first scraper 413. The second support structure 421, the second reinforcement structure 422, the second scraper 423 included in the second rake frame 42, and the second angles formed between the extension direction of the second scraper 423 and the extension direction of the second support structure can be implemented in the same or similar manner and will not be repeated here.

[0041] Figure 5 The working diagram of the stirring unit 4 is shown in FIG. Figure 3 and Figure 5 As shown, in the embodiment of the present application, on a plane perpendicular to the central axis of the tank body 1, the radial distance L1 of the first rake 41 (specifically, L1 can be represented by the radial distance between the outermost first scraper 413 and the central axis) is greater than the radial distance L2 of the second rake (specifically, L2 can be represented by the radial distance between the outermost second scraper 423 and the central axis). Figure 3 and Figure 5 In the illustrated embodiment, the number of the first scrapers 413 provided on the first rake frame 41 is five, and the number of the second scrapers 423 provided on the second rake frame 42 is three.

[0042] Since the feed unit 2 is coaxially arranged with the tank body 1, when the slurry requiring solid-liquid separation settles downward from the bottom of the feed unit 2, it rotates circumferentially and gradually diffuses radially under the stirring of the stirring unit, and finally settles to the conical portion 12. During the sedimentation process, the degree of enrichment of the solid components settling in the conical portion 12 is not the same. The area closer to the central axis has a larger number of solid components settled, and the particle volume and weight are larger, while the opposite is true for the area farther from the central axis. Therefore, by extending the radial distance L1 of the first rake 41 so that it can scrape the solid components from all areas of the conical portion 12 as much as possible, and at the same time appropriately shortening the radial distance L2 of the second rake 42 so that it can scrape the enriched solid components close to the central axis as much as possible, it is possible to avoid the problem that when the length of all rakes is set longer, the utilization rate of the scraper on the outer part is low, the overall structural weight of the stirring unit 4 becomes heavier, and the energy consumption of the motor drive is increased.

[0043] The radial distances L1 and L2 between the first rake 41 and the second rake 42 are set in relation to the inner diameter of the tank body 1 and the cone angle of the tapered portion 12, wherein L1 is preferably close to the inner diameter of the tank body 1, for example, greater than or equal to 0.95 times the inner radius of the tank body 1, so that the outermost first scraper 413 is as close as possible to the junction of the tapered portion 12 and the straight cylindrical portion 11; although increasing the cone angle of the tapered portion 12 can effectively shorten the height of the tapered portion 12, reduce material consumption and construction difficulty, the closer the bottom surface of the tapered portion 12 is to the horizontal, the more uniform the distribution of solid component sedimentation, and the radial distance L2 of the second rake 42 needs to be set longer. For this reason, in some preferred embodiments, the cone angle of the tapered portion 12 is in the range of 9-30°, and the ratio of L1 to L2 is in the range of 1.5-2.5.

[0044] 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 high-efficiency aggregate thickener, characterized in that: It comprises a tank body (1), a feeding unit (2), a driving unit (3) and a stirring unit (4); The feeding unit (2) is fixedly arranged on the upper part of the tank body (1), and the bottom end of the feeding unit (2) is lower than the top end of the tank body (1); The driving unit (3) comprises a motor (31) and a driving shaft (32), wherein the motor (31) is fixedly arranged above the feeding unit (2), the upper end of the driving shaft (32) is fixedly connected to the motor shaft of the motor (31), and the other end thereof extends downwardly coaxially with the tank body (1) and passes through the feeding unit (2); The stirring unit (4) is arranged below the feeding unit (2), and includes a first rake (41) and a second rake (42) alternately distributed around the drive shaft (32), the first rake (41) including a plurality of first scrapers (413) arranged in a radial direction, the second rake (42) including a plurality of second scrapers (423) arranged in a radial direction, and the radial distance between the outermost first scraper (413) and the drive shaft (32) is greater than the radial distance between the outermost second scraper (423) and the drive shaft (32).

2. The high-efficiency aggregate thickener according to claim 1, characterized in that: The tank body (1) comprises a straight cylindrical portion (11), a tapered portion (12) and a material collecting barrel (13) coaxially arranged from top to bottom; an overflow trough (14) and an overflow pipe (141) are provided at the top end of the straight cylindrical portion (11); and a discharge pipe (131) is provided at the bottom end of the material collecting barrel (13).

3. The high-efficiency aggregate thickener according to claim 2, characterized in that: The first rake frame (41) further includes a first support structure (411), the first support structure (411) being fixedly connected to the drive shaft (32), extending radially outward from the central axis of the tank body (1), and tilting upward synchronously with the bottom of the tapered portion (12), and the plurality of first scrapers (413) being arranged below the first support structure (411); The second rake frame (42) further includes a second support structure (421), the second support structure (421) being fixedly connected to the drive shaft (32), extending radially outward from the central axis of the tank body (1), and tilting upward synchronously with the bottom of the tapered portion (12), and the plurality of second scrapers (423) being arranged below the second support structure (421); The radial length of the first support structure (411) is greater than the radial length of the second support structure (421).

4. The high-efficiency aggregate thickener according to claim 3, characterized in that: The first rake frame (41) further includes a first reinforcement structure (412) fixedly connected to the drive shaft (32) and the first support structure (411), and the second rake frame (42) further includes a second reinforcement structure (422) fixedly connected to the drive shaft (32) and the second support structure (421).

5. The high-efficiency aggregate thickener according to claim 3, characterized in that: The number of first scrapers (413) provided on the first supporting structure (411) is greater than the number of second scrapers (423) provided on the second supporting structure (421).

6. The high-efficiency aggregate thickener according to claim 3, characterized in that: The extension direction of the first scraper (413) and the extension direction of the first support structure (411) form a first non-zero angle; The extension direction of the second scraper (423) and the extension direction of the second support structure (421) form a second non-zero angle.

7. The high-efficiency aggregate thickener according to claim 6, characterized in that: The first angles are the same or different, and the second angles are the same or different.

8. The high-efficiency aggregate thickener according to claim 2, characterized in that: The radial distance L1 between the outermost first scraper (413) on the first rake (41) and the drive shaft (32) is greater than or equal to 0.95 times the inner radius of the straight cylindrical portion (11) of the tank body (1).

9. The high-efficiency aggregate thickener according to claim 2, characterized in that: The cone angle of the conical portion (12) is in the range of 9-30 degrees, and the ratio of the radial distance L1 between the outermost first scraper (413) of the first rake (41) and the drive shaft (32) to the radial distance L2 between the outermost second scraper (423) of the second rake (42) and the drive shaft (32) is in the range of 1.5-2.5.

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