Thickener

Abstract

The thickener comprises a pool body, a driving device, a raking machine and a feeding device, the pool body is provided with a discharging port and an overflow weir, the discharging port is located at the bottom of the pool body, the overflow weir is located on the outer side of the upper edge of the pool body, the driving device, the raking machine and the feeding device are respectively installed on the pool body, and a filtering device is installed on the pool body; the raking machine comprises a raking shaft and a raking frame, the raking shaft is connected with the driving device, the driving device is used for driving the raking shaft to rotate, the raking frame is fixedly connected with the raking shaft, the filtering device comprises a filter element, the filter element floats on the liquid level, and a claw climb is installed on the raking frame and located below the filter element. When the filter element adsorbs certain small-particle floccules, the liquid level is controlled to descend, so that the filter element is in contact with the claw climb, and then the driving device drives the rake shaft to rotate and drives the rake frame to rotate so as to drive the claw climb to rotate around the rake shaft, so that the small-particle floccules on the filter element are cleaned. After cleaning, the liquid level rises to the filtering height, and the work is continued. And the working time of the filter element can be effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of solid-liquid separation, and specifically relates to a thickener. Background Art

[0002] Thickener is a solid-liquid separation equipment based on gravity sedimentation. It is usually a cylindrical shallow trough with a conical bottom made of concrete as the structural material. The slurry with a solid weight of 10%-20% can be concentrated into an underflow slurry with a solid content of 45%-55% by gravity sedimentation. With the help of a slow-running (1 / 3-1 / 5r / min) rake installed in the thickener, the thickened underflow slurry is discharged from the underflow port at the bottom of the thickener. A relatively clean clarified liquid (overflow) is produced at the top of the thickener and discharged from the annular chute at the top. Thickeners are widely used in production sites that require solid-liquid enrichment and separation, such as hydrometallurgy, ore dressing plants, and chemical plants. They have a diameter of 3-100m and a depth of 2-4m.

[0003] Traditional thickeners only have a drive unit and a rake, which scrapes the mud toward the center. The overflow clarity is often around 200ppm. To achieve a clarity requirement of 50ppm, it is usually necessary to add a microporous filter to the post-thickener process to achieve the required clarity, which has a high installation cost. Utility Model Content

[0004] The utility model provides a thickener. A filter device is installed on the thickener, which can improve the clarity of overflow and clean the filter device.

[0005] The specific technical solutions are as follows:

[0006] A thickener comprises a tank body, a driving device, a rake machine and a feeding device, wherein the tank body is provided with a discharge port and an overflow weir, wherein the discharge port is located at the bottom of the tank body, and the overflow weir is located at the outer side of the upper edge of the tank body, wherein the driving device, the rake machine and the feeding device are respectively installed on the tank body, and wherein a filtering device is installed on the tank body; the rake machine comprises a rake shaft and a rake frame, wherein the rake shaft is connected to the driving device, wherein the driving device is used to drive the rake shaft to rotate, and wherein the rake frame is fixedly connected to the rake shaft, and wherein the filtering device comprises a filter ball, wherein the filter ball floats on the liquid surface, and wherein a claw is installed on the rake frame, and wherein the claw is located below the filter ball.

[0007] Through the above technical solution, when the filter ball absorbs a certain amount of small particle flocs, the liquid level is controlled to drop so that the filter ball contacts the claws, and then the driving device drives the rake shaft to rotate, driving the rake frame to rotate and thus driving the claws to rotate around the rake shaft to clean the small particle flocs on the filter ball. After cleaning, the liquid level rises to the filtering height and continues to work. The working time of the filter ball can be effectively extended.

[0008] Preferably, the filter device is fixed at the upper edge of the pool body, and the filter device includes an inner ring baffle, a sieve mesh and a filter element. The inner ring baffle and the inner wall of the pool body form a filter channel, the sieve mesh is installed on the top of the filter channel, the filter element is a filter ball, the filter ball is placed in the filter channel, and the claw is located below the filter ball.

[0009] Through the above technical solution, the baffle plate and the inner wall of the tank body form a filtering channel to limit the flow direction of the overflow liquid, so that it flows through the filtering device, ensuring the filtering effect of the overflow liquid. The mesh can limit the filter ball to be below the liquid surface, and the mesh can also play a filtering role. The mesh cooperates with the filter ball to further improve the clarity of the overflow liquid.

[0010] Preferably, the claw climbing frame is fixed to the rake frame through a claw climbing frame, and the claw climbing frame includes a connecting rod and a reinforcing rod, one end of the connecting rod is fixedly connected to the end of the rake frame, and the other end is connected to the claw climbing frame, the reinforcing rod is fixedly connected to the connecting rod, and the other end is fixedly connected to the rake shaft.

[0011] Through the above technical solution, the structural strength of the claw climbing installation is strengthened by the reinforcing rod.

[0012] Preferably, a sedimentation chamber is provided on the pool body, and the sedimentation chamber is located at the central position of the upper part of the pool body. The feeding device includes a feeding pipe, and the feeding pipe is connected to the sedimentation chamber.

[0013] The above technical solution facilitates the sedimentation of the mixed liquid in the sedimentation chamber.

[0014] Preferably, a truss is installed on the pool body, the driving device is installed on the truss, and the rake shaft passes through the bottom of the truss and is connected to the driving device.

[0015] The above technical solution facilitates the installation of the drive device.

[0016] Preferably, the driving device comprises a first motor and a second motor, wherein the first motor is connected to the rake shaft via a first rotating mechanism to drive the rake shaft to rotate; and the second motor is connected to the rake shaft via a second transmission mechanism to drive the rake shaft to lift or lower.

[0017] Through the above technical solution, the second motor can use the second transmission mechanism to lift and lower the rake shaft and the rake frame, which is convenient for disassembly, assembly and maintenance of the rake shaft and the rake frame.

[0018] Preferably, the discharge port is located below the rake shaft, the discharge port is conical in shape, and a scraper is installed on the rake shaft at the discharge port.

[0019] Through the above technical solution, the scraper can hang the sediment from the inner wall of the pool body, making it easier for it to flow out from the discharge port.

[0020] Preferably, an anti-corrosion layer is provided on the inner wall of the pool body.

[0021] Through the above technical solution, the inner wall of the pool body is protected and the corrosion of the inner wall of the pool body by the liquid in the pool body is reduced.

[0022] Preferably, a maintenance platform is provided on the pool body, and the maintenance platform is located on the outer wall of the pool body at the overflow weir.

[0023] The above technical solution facilitates the maintenance of the thickener.

[0024] The beneficial effects of the utility model are:

[0025] 1. The filter device can improve the clarity of overflow;

[0026] 2. The mesh holes and filter balls are matched to further improve the overflow clarity;

[0027] 3. The claw can clean the filter ball and improve the use effect and use time of the filter ball. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0029] Figure 1 It is a structural schematic diagram of Example 1;

[0030] Figure 2 for Figure 1 The enlarged schematic diagram of part A in the middle;

[0031] Figure 3 It is a schematic diagram of the driving device structure;

[0032] 1. Pool body, 11. Discharge port, 12. Overflow weir, 13. Anti-corrosion layer, 14. Maintenance platform, 2. Rake shaft, 21. Scraper, 3. Rake frame, 4. Claw, 41. Connecting rod, 42. Reinforcing rod, 5. Filter device, 51. Inner ring baffle, 52. Sieve mesh, 53. Filter ball, 6. Sedimentation chamber, 7. Feed pipe, 8. Truss, 9. Drive device, 91. First motor, 92. Second motor, 10. Flocculant adder. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0035] Example 1

[0036] like Figure 1-3 As shown, a thickener includes a tank body 1, a driving device 9, a rake and a feeding device. The driving device 9, the rake and the feeding device are installed on the tank body 1. The tank body 1 is cast by concrete. A discharge port 11 and an overflow weir 12 are provided on the tank body 1. An anti-corrosion layer 13 is coated on the inner wall of the tank body 1 and the overflow weir 12. The anti-corrosion layer 13 can protect the inner wall of the tank body and reduce the corrosion of the liquid in the tank body to the inner wall of the tank body. A maintenance platform 14 is provided on the tank body 1, and the maintenance platform 14 is located on the outer wall of the tank body 1 at the overflow weir 12. It is convenient for the maintenance of the thickener. The discharge port 11 is located at the bottom of the tank body 1. The overflow weir 12 is located on the outer side of the upper edge of the tank body 1.

[0037] There is a filter device 5 at the upper edge of the pool body 1. The filter device 5 includes an inner ring baffle 51, a mesh 52 and a filter element. The filter element of this embodiment uses a filter ball 53. The inner ring baffle 51 and the inner wall of the pool body 1 form a filter channel, and the filter ball 53 is placed in the filter channel. The mesh 52 is installed on the top of the filter channel. The inner ring baffle 51 and the inner wall of the pool body 1 form a filter channel to limit the flow direction of the overflow liquid so that it flows through the filter ball 53 to ensure the filtering effect of the overflow liquid. The mesh 52 can limit the filter ball 53 so that it is located below the liquid surface. At the same time, the mesh 52 can also play a filtering role. The mesh 52 cooperates with the filter ball 53 to further improve the clarity of the overflow liquid.

[0038] The rake machine includes a rake shaft 2 and a rake frame 3, the rake shaft 2 is connected to a driving device 9, the driving device 9 is used to drive the rake shaft 2 to rotate, and the rake frame 3 is connected to the rake shaft 2 by bolts. The rake frame 3 is installed with a claw 4 through a claw frame, and the claw frame includes a connecting rod 41 and a reinforcing rod 42. The end of the rake frame 3 close to the inner wall of the pool body 1 is connected to the connecting rod 41, and the connecting rod 41 is parallel to the rake shaft 2. The top of the connecting rod 41 is connected to the claw 4, and the claw 4 is located below the filter ball 53. The reinforcing rod 42 is fixedly connected to the connecting rod 41, and the other end is fixedly connected to the rake shaft 2. When the filter ball 53 absorbs a certain amount of small particle flocs, the liquid level is controlled to drop so that the filter ball 53 contacts the claw 4, and then the driving device 9 drives the rake shaft 2 to rotate, driving the rake frame 3 to rotate, thereby driving the claw 4 to rotate around the rake shaft 2 to clean the small particle flocs on the filter ball. After cleaning, the liquid level rises to the filtering height and continues to work. The working time of the filter ball can be effectively extended.

[0039] A truss 8 is installed on the tank body 1, and a driving device 9 is installed on the truss 8. The rake shaft 2 passes through the bottom of the truss 8 and is connected to the driving device 9. The driving device 9 includes a first motor 91 and a second motor 92. The first motor 91 is connected to the rake shaft 2 through a first rotating mechanism, and is used to drive the rake shaft 2 to rotate; the second motor 92 is connected to the rake shaft 2 through a second transmission mechanism, and is used to drive the rake shaft 2 to rise or fall. In this embodiment, the first rotating mechanism and the second transmission mechanism respectively adopt transmission gear sets. The first motor 91 can drive the rake shaft 2 to rotate through the first rotating mechanism, so as to drive the rake frame 3 and the claw to rotate. The second motor can lift and lower the rake shaft and the rake frame through the second transmission mechanism, which is convenient for the disassembly and maintenance of the rake shaft and the rake frame.

[0040] The tank body 1 is provided with a settling chamber 6, which is located at the upper center of the tank body 1. The feeding device includes a feeding pipe 7, which is connected to the settling chamber 6. A flocculant adder 10 is provided in the settling chamber. The mixed liquid entering the feeding pipe 7 is flocculated and settled in the settling chamber 6.

[0041] The discharge port 11 is located below the rake shaft 2, and the shape of the discharge port 11 is conical. A scraper 21 is installed on the rake shaft 2 at the discharge port 11. The scraper 21 is arranged in an inverted triangle. The scraper 21 can scrape the sediment from the inner wall of the tank body 1, so that the sediment flows out from the discharge port.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A thickener, characterized in that: The invention comprises a tank body (1), a driving device (9), a rake machine and a feeding device, wherein the tank body (1) is provided with a discharge port (11) and an overflow weir (12), wherein the discharge port (11) is located at the bottom of the tank body (1), and the overflow weir (12) is located at the outer side of the upper edge of the tank body (1), wherein the driving device (9), the rake machine and the feeding device are respectively installed on the tank body (1), and wherein a filtering device (5) is installed on the tank body (1); wherein the rake machine comprises a rake shaft (2) and a rake frame (3), wherein the rake shaft (2) is connected to the driving device (9), wherein the driving device (9) is used for driving the rake shaft (2) to rotate, and wherein the rake frame (3) is fixedly connected to the rake shaft (2), and wherein the filtering device (5) comprises a filtering ball, wherein the filtering ball floats on the liquid surface, and wherein a claw (4) is installed on the rake frame (3), and wherein the claw (4) is located below the filtering ball.

2. A thickener according to claim 1, characterized in that: The filter device (5) is fixed to the upper edge of the pool body (1), and comprises an inner ring baffle (51), a mesh screen (52) and a filter element. The inner ring baffle (51) and the inner wall of the pool body (1) form a filter channel. The mesh screen (52) is installed on the top of the filter channel. The filter element is a filter ball (53). The filter ball (53) is placed in the filter channel, and the claw (4) is located below the filter ball (53).

3. A thickener according to claim 1, characterized in that: The claw climber (4) is fixed to the rake frame (3) via a claw climber frame, and the claw climber frame comprises a connecting rod (41) and a reinforcing rod (42), one end of the connecting rod (41) is fixedly connected to the end of the rake frame (3), and the other end is connected to the claw climber (4), and the reinforcing rod (42) is fixedly connected to the connecting rod (41), and the other end is fixedly connected to the rake shaft (2).

4. A thickener according to claim 1, characterized in that: The tank body (1) is provided with a sedimentation chamber (6), the sedimentation chamber (6) is located at the central position of the upper part of the tank body (1), and the feeding device comprises a feeding pipe (7), and the feeding pipe (7) is connected to the sedimentation chamber (6).

5. A thickener according to claim 1, characterized in that: A truss (8) is installed on the tank body (1), the driving device (9) is installed on the truss (8), and the rake shaft (2) passes through the bottom of the truss (8) and is connected to the driving device (9).

6. A thickener according to claim 1, characterized in that: The driving device (9) comprises a first motor (91) and a second motor (92); the first motor (91) is connected to the rake shaft (2) via a first rotating mechanism and is used to drive the rake shaft (2) to rotate; the second motor (92) is connected to the rake shaft (2) via a second transmission mechanism and is used to drive the rake shaft (2) to rise or fall.

7. A thickener according to claim 1, characterized in that: The discharge port (11) is located below the rake shaft (2). The discharge port (11) is in a conical shape. A scraper (21) is installed on the rake shaft (2) at the discharge port (11).

8. A thickener according to claim 1, characterized in that: An anti-corrosion layer (13) is provided on the inner wall of the pool body (1).

9. A thickener according to claim 1, characterized in that: The tank body (1) is provided with a maintenance platform (14). The inspection platform (14) is located on the outer wall of the pool body (1) at the overflow weir (12).

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