Multi-well discharge high-efficiency flocculation sedimentation tank

Abstract

The application discloses a multi-well discharging high-efficiency flocculation settling tank, relates to the technical field of hydrometallurgy, and comprises a settling tank body, a feeding pipe, a mixing well with an open bottom arranged above the middle part of the settling tank body, a distributor arranged in the mixing well and used for dispersing the slurry of the feeding pipe in the circumferential direction, a feeding pipe connected with the distributor in the tangential direction of the circumference, a material lifting device arranged in the mixing well and used for bringing the supernatant of the settling tank body into the mixing well, a plurality of separation wells arranged in the circumferential direction outside the mixing well in the settling tank body, a chute arranged in communication between the mixing well and the separation well, a flocculating agent pipe connected with the chute, and an annular material distribution plate arranged in the positive circular cone direction and arranged at the bottom of the separation well. The application is characterized in that a plurality of separation wells are arranged around the mixing well in the center of the settling tank, the multi-well discharging is adopted, the flocculation is rapidly dispersed, the cross-sectional area of the settling tank is effectively utilized, and the treatment capacity per unit area 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:

[0007] 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 above the 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.

[0008] Further, the number of the separation wells is three or more than three.

[0009] 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.

[0010] 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.

[0011] 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°.

[0012] 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 a reverse 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 reverse conical annular conical plate structure.

[0013] 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°.

[0014] Further, the setting direction of the chute is tangent to the circumferences of the mixing well and the separation well.

[0015] Further, the chute is provided with an adjusting valve.

[0016] Further, the bottom of the settling tank body is a reverse conical conical body, the bottom has a discharge port, and the conical angle of the conical body is 30°-45°.

[0017] The beneficial effects of the present application are:

[0018] 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.

[0019] 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.

[0020] 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. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 The figure is a structural schematic diagram of the multi-well discharging high-efficiency flocculation settling tank.

[0022] Fig. 2 It is the enlarged schematic view of the mixing well part structure of the settling tank of the present application;

[0023] Fig. 3 It is the top view schematic view of the settling tank of the present application.

[0024] In the figure: 1 is the distributor, 1-1 is the upper cover, 1-2 is the lower supporting plate, 2 is the feeding pipe, 3 is the flocculant pipe, 4 is the regulating valve, 5 is the chute, 6 is the material lifting device, 7 is the mixing well, 7-1 is the mixing well body, 7-2 is the mixing well bottom, 7-3 is the mixing well bottom opening, 8 is the separation well, 9 is the material spreading plate, 10 is the settling tank body, 11 is the overflow pipe, 12 is the sludge discharge pipe. DETAILED DESCRIPTION

[0025] In order to better explain the present application, so as to be understood, the present application is described in detail by specific embodiments in combination with the accompanying drawings.

[0026] As Figs. 1-3 shown, the present application proposes a multi-well discharging high-efficiency flocculation settling tank, which comprises a settling tank body 10, a feeding pipe 2, a mixing well 7 with an opening in the bottom and arranged above the middle part of the settling tank body 10, a distributor 1 arranged in the mixing well 7 and used for dispersing the slurry from the feeding pipe 2 in the circumferential direction, and the feeding pipe 2 is connected with the distributor 1 in the tangential direction of the circumference, so that the slurry entering the distributor 1 is uniformly discharged from the distributor 1 to the mixing well 7 in the circumferential direction while rotating. Specifically, as Fig. 2 shown, the distributor 1 comprises an upper cover 1-1 and a lower supporting plate 1-2, and the upper cover 1-1 and the lower supporting plate 1-2 can be connected by a connecting piece, which can be a round pipe welded between the upper cover 1-1 and the lower supporting plate 1-2, or other connecting pieces. An annular channel is formed between the upper cover 1-1 and the lower supporting plate 1-2 in the middle part, so that the slurry is guided out in the tangential direction of the circumference along the annular channel. More specifically, the middle part of the upper cover 1-1 is a circular flat plate structure, and the circular flat plate is connected with an upper cover annular conical plate arranged in the direction of a right circular cone in the circumferential direction, and the included angle between the conical generatrix of the upper cover annular conical plate and the bottom surface of the conical plate is 10°~15°. The middle part of the lower supporting plate 1-2 is a lower supporting plate conical plate arranged in the direction of a right circular cone, and the bottom circumference of the lower supporting plate conical plate is connected with a lower supporting plate annular flat plate. The combined structure of the upper cover 1-1 and the lower supporting plate 1-2 can make the slurry flow around the conical plate while being uniformly dispersed out of the distributor 1.

[0027] The mixing well 7 is also provided with a material lifting device 6 for bringing the supernatant of the settling tank 10 into the mixing well 7. Specifically, the material lifting device 6 is arranged at the bottom opening of the mixing well 7, and can be a stirring paddle structure or a pump, etc., as long as it can bring the supernatant of the settling tank 10 into the mixing well 7 from the bottom opening of the mixing well 7. When the material lifting device 6 is a stirring paddle structure, the stirring paddle can be arranged through the middle part of the distributor 1.

[0028] The upper part of the mixing well 7 is a straight cylinder section mixing well body 7-1, and the lower part is a mixing well bottom 7-2 with a reverse conical annular conical plate structure, and the middle part of the mixing well bottom 7-2 is welded or integrally formed with the reverse conical annular conical plate structure mixing well bottom opening 7-3. Specifically, the angle between the conical generatrix of the annular conical plate of the mixing 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 conical plate of the mixing well bottom opening 7-3 and the horizontal direction is an acute angle of 40°-60°. The reverse conical slope of the mixing well bottom 7-2 is used to collect the slurry flowing out of 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 then the material lifting device 6 arranged at the mixing well bottom opening 7-3 of the mixing well 7 is used to guide the supernatant in the settling tank 10 into the position of the mixing well bottom 7-2, and then flow tangentially along the inverted annular conical plate, mix with the slurry, and then the mixed and diluted slurry has a tangential velocity, and then enters the chute 5. The distance between the chute 5 and the mixing well bottom 7-2 can make the slurry at the mixing 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, etc., and adapt to production.

[0029] A plurality of separation wells 8 are arranged circumferentially outside the mixing well 7 in the settling tank body 10, and the mixing well 7 and the separation well 8 are connected through the chute 5. The chute 5 is connected with the flocculant pipe 3, specifically, the flocculant pipe 3 is inserted into the chute 5 from the top, and the setting direction of the chute 5 is tangent to the circumferences of the mixing 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 mud to be treated and the diameter of the settling tank body 10, so that the flocculation can flow to all positions of the settling tank section. The diluted slurry flows into the chute 5 and mixes with the flocculant released by the flocculant pipe 3, and then enters the separation well 8 tangentially to complete flocculation. The adjusting valve 4 can be arranged in the chute 5, which is used to control 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 ring-shaped distribution plate 9 arranged in a right circular cone direction, and the distribution plate 9 can be fixed by being hung on the edge of the separation well 8 through a pull rod or the like. The slurry in the separation well 8 is uniformly discharged into the settling tank body 10 along the ring-shaped distribution plate 9. The present application adopts the form that the mixing well 7 and the separation well 8 are arranged separately, which can well control the solid content of the diluted slurry and provide favorable conditions for the flocculant 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 processing capacity per unit area 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 mixing well 7 are hung on the top beam of the settling tank through a pull rod or the like, and an inspection hole is designed above the separation well 8 and the mixing well 7, which is convenient for maintenance.

[0030] The bottom of the settling tank body 10 is a conical body with a discharge port, and the discharge port is connected with the mud discharge pipe 12. The flocculation is compressed and gathered to the mud discharge port 12 under the action of the conical bottom of the settling tank body 10, and then discharged from the settling tank. Specifically, the cone angle of the conical body is 30°-45°, and through the setting of the cone angle of the bottom of the settling tank body 10, the flow of the mud layer is ensured, and the traditional mud rake can be cancelled. The overflow pipe 11 is arranged at the position corresponding to the clear liquid of the settling tank body 10, which is used to discharge the upper clear liquid of the settling tank body 10.

[0031] 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, replacement, modification and variation of the above embodiments made by those skilled in the art are within the scope of the present application.

Claims

1. A multi-well discharge high-efficiency flocculation sedimentation tank, comprising a sedimentation tank body (10), a feed pipe (2), characterized in that: The bottom of the mixing well (7) is provided with an open part, and the mixing well (7) is provided with a distributor (1) for dispersing the slurry of the feed in the circumferential direction, a feed pipe (2) is connected to the distributor (1) in the circumferential tangential direction, and the mixing well (7) is also provided with a lifting device (6) for bringing the supernatant of the settling tank (10) into the mixing well (7), a plurality of separation wells (8) are arranged 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 through a chute (5), the chute (5) is connected with a flocculating agent pipe (3), and the bottom of the separation well (8) is provided with an annular distribution plate (9) arranged in a right circular cone direction; the number of the separation well (8) is three or more; the distributor (1) comprises an upper cover (1-1) and a lower supporting plate (1-2), and an annular channel is formed between the upper cover (1-1) and the lower supporting plate (1-2) in a downward inclined direction, so that the slurry is dispersed in the circumferential tangential direction along the annular channel; the middle part of the upper cover (1-1) is a circular flat plate structure, the circular flat plate is connected with an upper cover annular conical plate arranged in a right circular cone direction in the circumferential direction, the middle part of the lower supporting plate (1-2) is a lower supporting plate conical plate arranged in a right circular cone direction, and the bottom of the lower supporting plate conical plate is connected with a lower supporting plate annular flat plate in the circumferential direction; the upper part of the mixing well (7) is a straight cylinder section mixing well body (7-1), and the lower part is a mixing well bottom (7-2) with a reverse conical annular conical plate structure, and the middle part of the mixing well bottom (7-2) is connected with a mixing well bottom opening (7-3) with a reverse conical annular conical plate structure.

2. A multi-well discharge high efficiency flocculating sedimentation tank according to claim 1, characterized in that: The included angle between the conical generatrix of the upper cover annular conical plate and the conical bottom surface is 10°-15°.

3. A multi-well discharge high efficiency flocculating sedimentation tank according to claim 1, characterized in that: The included angle between the conical generatrix of the annular conical plate of the mixing well bottom (7-2) 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 mixing well bottom opening (7-3) and the horizontal direction is an acute angle of 40°-60°.

4. The multi-well discharge high efficiency flocculating sedimentation tank according to claim 1, characterized in that: The setting direction of the chute (5) is tangent to the circumferences of the mixing well (7) and the separation well (8).

5. A multi-well discharge high efficiency flocculating sedimentation tank according to claim 1, characterized in that: The chute (5) is provided with an adjusting valve (4).

6. A multi-well discharge high efficiency flocculating sedimentation tank according to claim 1, characterized in that: The bottom of the settling tank (10) is a reverse conical circular cone with a discharge port, and the cone angle of the circular cone is 30°-45°.

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