Multi-well discharging efficient flocculation settling tank

Abstract

A multi-well discharging efficient flocculation settling tank relates to the technical field of hydrometallurgy and comprises a settling tank body, a feeding pipe and a mixing well arranged above the middle in the settling tank body, an opening is formed in the bottom of the mixing well, a distributor used for dispersing fed slurry in the circumferential direction is arranged in the mixing well, and the feeding pipe is connected with the distributor in the circumferential tangential direction. The mixing well is internally provided with a material lifting device which is used for carrying supernatant liquid of the settling tank body into the mixing well, a plurality of separating wells are arranged in the settling tank body and outside the mixing well in the circumferential direction, the mixing well is communicated with the separating wells through chutes, the chutes are connected with a flocculating agent pipe, and the bottoms of the separating wells are provided with annular material scattering plates which are arranged in the direction of a regular cone. A plurality of separation wells are arranged around the mixing well in the center of the settling tank, and multi-well blanking is adopted, so that floccules are quickly diffused, the sectional area of the settling tank is effectively utilized, and the unit area treatment capacity of the settling tank is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrometallurgy, and particularly relates to a high-efficiency flocculation settling tank with multi- well discharging. BACKGROUND

[0002] The settling tank is a key equipment for many hydrometallurgical processing operations, and is particularly suitable for the separation and washing process of tailings. The settling tank is provided with a feed well, and the flocculant is fully utilized to enhance the gravity settling effect, so as to produce overflow with high clarity and underflow with high solid content.

[0003] The existing settling tank is generally provided with a feed well at the center position of the settling tank, and the flocculation and separation of solid particles are completed in the center feed well. With the increase of production capacity, the diameter of the settling tank is continuously increased, but the feed well cannot be arbitrarily enlarged according to the diameter of the settling tank, because the feed well cannot play the role of mixing flocculation if the diameter is too large, and the diffusion of flocculation cannot be well completed through the outlet if the diameter is too small.

[0004] In addition, the existing settling tank is generally provided with a mud scraper at the bottom, which is supported by a truss arranged at the top of the tank, and is used to collect the solid particles settled at the bottom of the tank, and to concentrate and push the solid particles to the mud discharge port for discharge. With the increase of the diameter of the equipment, the power of the mud scraper is also increased. The overall structure of the settling tank is complex, and the feed well needs to be matched with the mud scraper to maximize the use of the cross-sectional area of the settling tank and improve the unit area treatment capacity of the settling tank. SUMMARY

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides a high-efficiency flocculation settling tank with multi-well discharging, which is provided with a plurality of separation wells around the mixing well at the center of the settling tank, and adopts multi-well feeding to make the flocculation quickly diffuse, effectively utilize the cross-sectional area of the settling tank, and improve the unit area treatment capacity of the settling tank.

[0006] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present application includes: A high-efficiency flocculation settling tank with multi-well discharging includes a settling tank body and a feed pipe, a mixing well with an open bottom is arranged at the upper middle part of the settling tank body, a distributor for dispersing the feed slurry in the circumferential direction is arranged in the mixing well, the feed pipe is connected to the distributor in the tangential direction of the circumference, a lifting device for bringing the supernatant in the upper layer of the settling tank body into the mixing well is further arranged in the mixing well, a plurality of separation wells are arranged in the circumferential direction outside the mixing well in the settling tank body, the mixing well and the separation wells are connected through a chute, the chute is connected to a flocculant pipe, and a ring-shaped spreading plate arranged in the direction of a right circular cone is arranged at the bottom of the separation well.

[0007] Further, the number of the separation wells is three or more.

[0008] Further, the distributor comprises an upper cover and a lower supporting plate, and an annular downward channel is formed between the upper cover and the lower supporting plate, so that the slurry is scattered along the circumferential tangential direction of the annular channel.

[0009] Further, the middle part of the upper cover is a circular flat plate structure, and the circular flat plate is connected with the annular conical plate of the upper cover arranged in the direction of a right circular cone in the circumferential direction; the middle part of the lower supporting plate is a lower supporting plate conical plate arranged in the direction of a right circular cone, and the bottom of the lower supporting plate conical plate is connected with the circular annular flat plate of the lower supporting plate.

[0010] Further, the included angle between the conical generatrix of the annular conical plate of the upper cover and the bottom surface of the cone is 10°-15°.

[0011] Further, the upper part of the mixing well is a straight cylinder section mixing well body, and the lower part is a mixing well bottom of the inverted conical annular conical plate structure, and the middle part of the mixing well bottom is connected with the opening of the mixing well bottom of the inverted conical annular conical plate structure.

[0012] Further, the included angle between the conical generatrix of the annular conical plate of the mixing well bottom and the horizontal direction is an acute angle of 10°-15°, and the included angle between the conical generatrix of the annular conical plate of the opening of the mixing well bottom and the horizontal direction is an acute angle of 40°-60°.

[0013] Further, the setting direction of the chute is tangent to the circumferences of the mixing well and the separation well.

[0014] Further, the chute is provided with an adjusting valve.

[0015] Further, the bottom of the settling tank body is a conical body of an inverted conical type, the bottom has a discharge port, and the conical angle of the conical body is 30°-45°.

[0016] The beneficial effects of the present application are: 1. The multi-well discharging high-efficiency flocculation settling tank adopts the separated forms of the mixing well and the separation well, can well control the solid content of the diluted slurry, and provides favorable conditions for the flocculant to play the maximum role.

[0017] 2. The settling tank adopts multiple separation well discharges, can make the floc rapidly diffuse, more effectively utilize the cross-sectional area of the settling tank, improve the unit area treatment capacity of the settling tank, and reduce the height of the straight cylinder section of the settling tank.

[0018] 3. The settling tank cancels the truss and the mud scraping rake of the previous settling tank, reduces the top and internal structure of the settling tank, facilitates the tank cleaning and maintenance of the settling tank, and reduces the construction and operation cost of the settling tank. DRAWINGS

[0019] Fig. 1 The figure is a structural schematic view of the multi-well discharging high-efficiency flocculation settling tank. Fig. 2This is an enlarged schematic diagram of the mixed well structure of the settling tank of the present invention; Fig. 3 This is a top view of the settling tank structure of the present invention.

[0020] In the diagram: 1 is the distributor, 1-1 is the top cover, 1-2 is the lower support plate, 2 is the feed pipe, 3 is the flocculant pipe, 4 is the regulating valve, 5 is the chute, 6 is the feed lifter, 7 is the mixing well, 7-1 is the mixing well body, 7-2 is the bottom of the mixing well, 7-3 is the bottom opening of the mixing well, 8 is the separation well, 9 is the spreading plate, 10 is the settling tank, 11 is the overflow pipe, and 12 is the sludge discharge pipe. Detailed Implementation

[0021] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figs. 1-3 As shown, this invention proposes a high-efficiency flocculation settling tank with multi-well discharge, including a settling tank body 10 and a feed pipe 2. A mixing well 7 with an open bottom is located above the center of the settling tank body 10. The mixing well 7 contains a distributor 1 for distributing the slurry fed through the feed pipe 2 in a circumferential direction. The feed pipe 2 is tangentially connected to the distributor 1, allowing the slurry entering the distributor 1 to rotate while flowing uniformly circumferentially out of the distributor 1 into the mixing well 7. Specifically, as... Fig. 2 As shown, the distributor 1 includes an upper cover 1-1 and a lower support plate 1-2. The upper cover 1-1 and the lower support plate 1-2 can be connected by a connector, specifically, the upper cover 1-1 and the lower support plate 1-2 can be welded together using a circular tube, or other connectors can be used for fixed connection. A downward-sloping annular channel is formed between the upper cover 1-1 and the lower support plate 1-2, allowing the slurry to be discharged tangentially along the circumference of the annular channel. More specifically, the middle part of the upper cover 1-1 is a circular flat plate structure, and the circumference of the circular flat plate is connected to an annular conical plate of the upper cover, with the angle between the generatrix of the cone and the bottom surface of the cone being 10°~15°. The middle part of the lower support plate 1-2 is a lower support plate conical plate, and the bottom circumference of the lower support plate conical plate is connected to the lower support plate annular flat plate. The combined structure of the upper cover 1-1 and the lower support plate 1-2 allows the slurry to flow around the conical plate while being evenly sprayed out of the distributor 1.

[0023] The mixing well 7 is also equipped with a feeder 6 for bringing the upper clear liquid from the settling tank 10 into the mixing well 7. Specifically, the feeder 6 is located at the bottom opening of the mixing well 7. The feeder 6 can be of various types, such as an agitator or a pump, as long as it can bring the upper clear liquid from the settling tank 10 into the mixing well 7 from the bottom opening. When the feeder 6 is an agitator, its agitator rod can be installed through the middle of the distributor 1.

[0024] The upper part of the mixed well 7 is a straight cylinder section mixed well body 7-1, and the lower part is a reverse cone annular cone plate structure mixed well bottom 7-2, and the middle part of the mixed well bottom 7-2 is welded or integrally formed with the reverse cone annular cone plate structure mixed well bottom opening 7-3. Specifically, the angle between the conical generatrix of the annular cone plate of the mixed well bottom 7-2 and the horizontal direction is an acute angle of 10°-15°, and the angle between the conical generatrix of the annular cone plate of the mixed well bottom opening 7-3 and the horizontal direction is an acute angle of 40°-60°. The reverse cone inclined surface of the mixed well bottom 7-2 is used to collect the slurry flowing out from the distributor 1 and not entering the separation well 8 along the chute 5, and guide it to the vicinity of the material lifting device 6, and the supernatant in the settling tank body 10 is introduced into the position of the mixed well bottom 7-2 through the material lifting device 6 arranged at the mixed well bottom opening 7-3 of the mixed well 7, and flows tangentially along the inverted annular cone plate, mixes with the slurry, and the mixed and diluted slurry has a tangential velocity, and enters the chute 5. The distance between the chute 5 and the mixed well bottom 7-2 can make the slurry at the mixed well bottom 7-2 enter the chute 5 with the action of the material lifting device 6. The rotation of the material lifting device 6 can simultaneously play the role of mixing the supernatant and the slurry. The material lifting device 6 can adopt a variable frequency motor, which can change at any time with the change of the slurry solid content, flow and other changes, and adapt to production.

[0025] A plurality of separation wells 8 are arranged circumferentially in the settling tank body 10 outside the mixed well 7, and the mixed well 7 and the separation well 8 are communicated through the chute 5. The chute 5 is connected with the flocculating agent pipe 3, and specifically, the flocculating agent pipe 3 is inserted into the chute 5 from the upper part, and the setting direction of the chute 5 is tangent to the circumferences of the mixed well 7 and the separation well 8. Specifically, the number of the separation well 8 is three or more, and the specific number is determined according to the amount of treated mud and the diameter of the settling tank body 10, so that the flocculation can flow to all positions of the settling tank cross section. The diluted slurry flows into the chute 5 and mixes with the flocculating agent released by the flocculating agent pipe 3, and enters the separation well 8 tangentially to complete flocculation. The chute 5 can be provided with an adjusting valve 4 for controlling the flow rate of the slurry entering the separation well 8 and the flow state of the slurry in the separation well 8. The bottom of the separation well 8 is provided with a circular cone direction arranged annular distribution plate 9, and the distribution plate 9 can be hung on the edge of the separation well 8 by means of a pull rod or the like. The slurry in the separation well 8 is uniformly discharged into the settling tank body 10 along the annular distribution plate 9. The present application adopts the form of separate arrangement of the mixed well 7 and the separation well 8, which can well control the solid content of the diluted slurry, and provide favorable conditions for the flocculating agent to play the maximum role. The use of multiple separation wells 8 for discharging can make the flocculation quickly spread, more effectively utilize the cross-sectional area of the settling tank, improve the unit area treatment capacity of the settling tank, and at the same time, can reduce the height of the straight cylinder section of the settling tank. The separation well 8 and the mixed well 7 are hung on the tank top beam of the settling tank through a pull rod structure, and a maintenance hole is designed above the separation well 8 and the mixed well 7, which is convenient for maintenance.

[0026] The bottom of the sedimentation tank body 10 is a reverse conical cone, the bottom has a discharge port, and the bottom discharge port is connected with the sludge discharge pipe 12. The flocs are compressed and gathered to the sludge discharge port 12 under the action of the conical bottom of the sedimentation tank body 10, and are discharged from the sedimentation tank. Specifically, the cone angle of the conical body is 30°-45°, and the flow of the sludge layer is ensured by setting the cone angle of the bottom of the sedimentation tank body 10, so that the traditional sludge rake can be cancelled. The overflow pipe 11 is arranged at the position corresponding to the clear liquid of the sedimentation tank body 10, and is used for discharging the upper clear liquid of the sedimentation tank body 10.

[0027] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and any modification, modification, replacement and modification of the above embodiments by those skilled in the art are within the scope of the present application.

Claims

1. A high-efficiency flocculation settling tank with multi-well discharge, comprising a settling tank body (10) and a feed pipe (2), characterized in that: A mixing well (7) with an opening at the bottom is provided in the middle of the settling tank (10). A distributor (1) is provided in the mixing well (7) to distribute the slurry in the circumferential direction. The feed pipe (2) is tangentially connected to the distributor (1). A lifting device (6) is also provided in the mixing well (7) to bring the clear liquid of the upper layer of the settling tank (10) into the mixing well (7). Several separation wells (8) are provided in the circumferential direction outside the mixing well (7) in the settling tank (10). The mixing well (7) and the separation well (8) are connected by a chute (5). The chute (5) is connected to the flocculant pipe (3). A ring-shaped spreading plate (9) is provided at the bottom of the separation well (8) in the direction of a positive conical.

2. The high-efficiency flocculation sedimentation tank with multi-well discharge according to claim 1, characterized in that: The number of separation wells (8) is three or more.

3. The high-efficiency flocculation sedimentation tank with multi-well discharge according to claim 1, characterized in that: The distributor (1) includes an upper cover (1-1) and a lower support plate (1-2). An obliquely downward annular channel is formed between the upper cover (1-1) and the lower support plate (1-2), so that the slurry is dispersed tangentially along the circumference of the annular channel.

4. The high-efficiency flocculation sedimentation tank with multi-well discharge according to claim 3, characterized in that: The upper cover (1-1) has a circular flat plate structure in the middle, and the circumference of the circular flat plate is connected to the annular cone plate of the upper cover in the direction of a positive cone. The lower support plate (1-2) has a lower support plate cone plate in the direction of a positive cone in the middle, and the bottom circumference of the lower support plate cone plate is connected to the annular flat plate of the lower support plate.

5. The high-efficiency flocculation sedimentation tank with multi-well discharge according to claim 4, characterized in that: The angle between the generatrix of the cone and the bottom surface of the cone on the upper cover annular cone plate is 10°~15°.

6. The high-efficiency flocculation sedimentation tank with multi-well discharge according to claim 1, characterized in that: The upper part of the mixed well (7) is a straight section of the mixed well body (7-1), and the lower part is a mixed well bottom (7-2) with an inverted cone annular cone plate structure. The middle part of the mixed well bottom (7-2) is connected to the bottom opening (7-3) of the mixed well with the inverted cone annular cone plate structure.

7. The high-efficiency flocculation sedimentation tank with multi-well discharge according to claim 6, characterized in that: The acute angle between the generatrix of the annular cone plate at the bottom of the mixed well (7-2) and the horizontal direction is 10°~15°, and the acute angle between the generatrix of the annular cone plate at the bottom opening (7-3) of the mixed well and the horizontal direction is 40°~60°.

8. The high-efficiency flocculation sedimentation tank with multi-well discharge according to claim 1, characterized in that: The chute (5) is tangent to the circumference of both the mixing well (7) and the separating well (8).

9. The high-efficiency flocculation sedimentation tank with multi-well discharge according to claim 1, characterized in that: The chute (5) is equipped with a regulating valve (4).

10. The high-efficiency flocculation sedimentation tank with multi-well discharge according to claim 1, characterized in that: The bottom of the settling tank (10) is an inverted cone-shaped cone with a discharge port at the bottom. The cone angle of the cone is 30°~45°.

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