CN115947429A - Dilution mixing flocculation feed well of settling tank - Google Patents
Dilution mixing flocculation feed well of settling tank Download PDFInfo
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- CN115947429A CN115947429A CN202211680875.1A CN202211680875A CN115947429A CN 115947429 A CN115947429 A CN 115947429A CN 202211680875 A CN202211680875 A CN 202211680875A CN 115947429 A CN115947429 A CN 115947429A
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Abstract
The invention relates to a dilution mixing flocculation feed well of a settling tank, which comprises an inner well of the feed well, an outer well of the feed well, a material dispersing plate, a feed pipe, a dilution port and an annular flocculant adding device, wherein the inner well of the feed well is a circular ring-shaped flocculant adding device; the inner well of the feeding well comprises a flow guide device arranged in the inner well wall, the flow guide device is communicated up and down, the upper end of the flow guide device is a cylinder, the lower end of the flow guide device is a conical shell, the bottom edge of the conical shell is lower than that of the inner well wall, and the feeding pipe is communicated with the inner well wall tangentially; the dilution port is arranged on the wall of the well outside the feeding well and is positioned between the liquid level of the supernatant and the liquid level of the slurry; the annular flocculating agent adding device is arranged on the periphery of the inner well of the feeding well; a conical shell material dispersing plate with an upward small end is arranged below the feeding well. Set up guiding device through at the well in the feed shaft, set up annular flocculating agent interpolation device in the wall of a well periphery, make ground paste and flocculating agent intensive mixing, set up and dilute the mouth and make the ground paste from diluting, set up the flitch and reached the feed shaft to even cloth in the subsider, and then the feed shaft has realized abundant dilution, mixture and even cloth.
Description
Technical Field
The invention relates to the technical field of solid-liquid separation equipment, in particular to a dilution mixing flocculation feed well of a settling tank.
Background
In the metallurgical industry, a settling tank is one of the main devices for solid-liquid separation in alumina production, is used for the red mud separation and washing process in the alumina production, separates liquid and solid in ore pulp by utilizing the natural gravity settling principle, slurry areas with different solid contents and densities are formed in the settling tank, slurry with high solid content is discharged from an underflow outlet, and clear liquid with low density is discharged from an overflow outlet, so that solid-liquid separation is realized.
The core device influencing the separation effect is a feed well of a settling tank. The conventional feed well has poor settling separation effect, feed slurry directly enters a settling area of a settling tank without sufficient kinetic energy dissipation and dilution mixing, and cannot fully exert the function of a flocculating agent, so that the settling tank has a series of problems of small unit treatment capacity, high flocculating agent consumption, low overflow clarity and the like, and the main reason is that the feed well cannot fully dilute, mix and uniformly distribute the material.
Disclosure of Invention
In view of the defects and shortcomings of the prior art, the invention provides a dilution mixing flocculation feed well of a settling tank, wherein a flow guide device is arranged in the inner well of the feed well, an annular flocculating agent adding device is arranged on the periphery of the inner well wall, so that slurry is fully mixed with flocculating agent, the slurry is automatically diluted by arranging a dilution port, the feed well is uniformly distributed into the settling tank by arranging a material dispersing plate, the feed well is fully diluted, mixed and uniformly distributed, and the problems of small unit processing capacity, large flocculating agent consumption and low overflow clarity of the settling tank are solved.
In order to achieve the purpose, the invention adopts the main technical scheme that:
a dilution mixing flocculation feed well of a settling tank comprises an inner well of the feed well, an outer well of the feed well, a material dispersing plate, a feed pipe, a dilution port and an annular flocculant adding device, wherein the relative position of the inner well of the feed well is higher than that of the outer well of the feed well;
the feeding well inner well comprises a flow guide device and an inner well wall, the flow guide device is arranged inside the inner well wall, the flow guide device is communicated up and down, the upper end of the flow guide device is a cylinder, the lower end of the flow guide device is a conical shell, the small end of the conical shell is the same as the bottom end of the cylinder in size, the bottom edge of the conical shell is lower than the bottom edge of the inner well wall, the large end of the conical shell is not smaller than the bottom end of the inner well wall in size, the feeding pipe is communicated with the inner well wall in a tangential direction, the joint of the feeding pipe corresponds to the cylindrical part of the flow guide device, and slurry flows in an annular space formed by the inner well wall and the cylindrical part of the flow guide device along the circumferential direction and flows to an outer well along the radial direction of the conical shell part of the flow guide device. By arranging the flow guide device, the kinetic energy dissipation of the slurry is realized, and the slurry uniformly flows into the well outside the feeding well.
The diluting port is arranged on the wall of the outer well of the feeding well and is positioned between the liquid level of supernatant of the settling tank and the liquid level of slurry in the feeding well, and the supernatant of the settling tank flows into the outer well of the feeding well through the diluting port to be mixed with the slurry. Through setting up the dilution mouth, the clear liquid of subsider flows into the dilution ground paste in the feeding well automatically under the effect of liquid level difference, has realized promptly that the ground paste is from diluting, and dilutes effectually.
The annular flocculant adding device is arranged on the periphery of the inner well of the feed well, so that the flocculant is added to the outer well of the feed well and mixed with slurry.
And a bulk material plate is arranged below the feeding well, the bulk material plate is a conical shell with an upward small end, and the treated slurry flows into the settling tank along the bulk material plate. The treated slurry is stably and uniformly distributed to the settling tank through the conical shell material dispersing plate, so that the settling efficiency is improved, and the treatment capacity of the settling tank is improved.
Further, still include that the air carries the material diluting device, the air carries the material diluting device and includes compressed air pipe, carries material pipe, chute, carry the material pipe and locate the outside of charge-in well outer well, carry the material pipe top and be equipped with the chute that links to each other with the charge-in well outer well, the bottom in carrying the material pipe is located to compressed air pipe lower extreme. Compressed air is introduced into the material lifting pipe through a compressed air pipe, the density of supernatant in the pipe is reduced, and the density difference between the supernatant in the material lifting pipe and the supernatant in the settling tank is realized, so that the supernatant in the pipe flows upwards and enters the well outside the feed well through the chute to be mixed with slurry. Through setting up the air and carrying the material diluting device, utilize compressed air to give the clear liquid of settling tank into the well outside the feedwell, realize the purpose of supplementary dilution.
Furthermore, a plurality of diluting openings and a plurality of air lifting and diluting devices are arranged. According to the requirement of engineering on dilution concentration, a plurality of dilution ports and air lifting dilution devices are arranged.
Further, the annular flocculant adding device comprises an annular pipeline, the annular pipeline is arranged on the periphery of the inner well of the feed well, and the annular pipeline is provided with a plurality of nozzles with downward openings, so that the flocculant is added to the outer well of the feed well and mixed with slurry. The annular flocculant adding device is arranged to realize the full mixing of the slurry and the flocculant, provide enough flocculation time and fully play the role of the flocculant.
Further, the lower wellhead diameter of the feedwell exterior well is less than the wellbore diameter and less than the maximum diameter of the particulate plate. And the slurry in the well outside the feeding well flows to the bulk material plate through the lower well mouth by limiting the size of the well mouth outside the feeding well.
Further, the feed pipe is provided with a plurality of. And arranging a plurality of feeding pipes according to the requirement of engineering on the flow of the slurry.
Further, the gradient of the conical shell part of the feeding well inner well is 30-60 degrees.
Further, the gradient of the bulk material plate is 30-60 degrees.
The slurry flows down stably and uniformly at a proper speed by limiting the gradient of the conical shell part of the well and the dispersion plate in the feed well.
The invention has the beneficial effects that:
(1) The slurry self-dilution is realized by arranging the dilution port, and when the concentration of the slurry is higher or the feeding amount is changed, the air lifting dilution device is started to assist in dilution, so that the dilution effect is good;
(2) By arranging the annular flocculating agent adding device at the periphery of the inner well wall and arranging the flow guide device in the inner well of the feeding well, the kinetic energy dissipation of slurry and the full mixing of the slurry and the flocculating agent are realized, sufficient flocculation time is provided, and the function of the flocculating agent is fully exerted;
(3) The treated slurry is stably and uniformly distributed to the settling tank through the conical shell material dispersing plate, so that the settling efficiency is improved, and the treatment capacity of the settling tank is improved.
Drawings
FIG. 1 is a schematic view of a settling tank;
FIG. 2 is a schematic diagram of the structure of a dilution mixing flocculation feed well of a settling tank of the present invention;
fig. 3 is a schematic diagram of a three-dimensional structure of a dilution mixing flocculation feedwell of a settling tank of the present invention.
In the figure: 1. a feed pipe; 2. a feedwell inner well; 21. an inner well wall; 22. a flow guide device; 3. an external well of the feedwell; 31. a dilution port; 4. a bulk material plate; 5. an air stripping dilution device; 51. a compressed air pipe; 52. a chute; 53. a material lifting pipe; 6. an annular flocculant adding device; 61. an annular duct; 611. a nozzle; 7. the liquid level of the supernatant; 8. slurry level; 9. a settling tank; 91. an overflow outlet; 92. a supernatant layer; 93. a settling layer; 94. and an underflow outlet.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present embodiments of the invention, which are illustrated in the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1-3, a dilution mixing flocculation feedwell of a settling tank comprises an inner feedwell well 2, an outer feedwell 3, a bulk cargo plate 4, a feedpipe 1, a dilution port 31 and an annular flocculant adding device 6, wherein the relative position of the inner feedwell 2 is higher than that of the outer feedwell 3;
the inner well 2 of the feed well comprises a flow guide device 22 and an inner well wall 21, the flow guide device 22 is arranged inside the inner well wall 21, the flow guide device 22 is vertically communicated, the upper end of the flow guide device is a cylinder, the lower end of the flow guide device is a conical shell, the small end of the conical shell is the same as the bottom end of the cylinder in size, the bottom end of the conical shell is lower than the bottom end of the inner well wall 21, the large end of the conical shell is not smaller than the bottom end of the inner well wall 21 in size, the feed pipe 1 is tangentially communicated with the inner well wall 21, the connecting part corresponds to the cylindrical part of the flow guide device 22, slurry flows along the circumferential direction in an annular space formed by the inner well wall 21 and the cylindrical part of the flow guide device 22, and flows to an outer well along the radial direction of the conical shell part of the flow guide device 22. By providing the deflector 22, kinetic energy dissipation of the slurry is achieved and the slurry flows evenly into the feedwell outer well 3.
The annular flocculating agent adding device 6 is arranged at the periphery of the feed well inner well 2, so that flocculating agent is added to the feed well outer well 3 to be mixed with slurry.
And a bulk material plate 4 is arranged below the feeding well outer well 3, the bulk material plate 4 is a conical shell with an upward small end, and the treated slurry flows into a settling tank 9 along the bulk material plate 4. The treated slurry is stably and uniformly distributed to the settling tank 9 through the conical shell material dispersing plate 4, so that the settling efficiency is improved, and the treatment capacity of the settling tank 9 is improved.
Specifically, the air stripping dilution device 5 further comprises a compressed air pipe 51, a stripping pipe 53 and a chute 52, wherein the stripping pipe 53 is arranged on the outer side of the feedwell outer well 3, the chute 52 connected with the feedwell outer well 3 is arranged at the top end of the stripping pipe 53, and the lower end of the compressed air pipe 51 is arranged at the bottom in the stripping pipe 53. Compressed air is introduced into the material lifting pipe 53 through a compressed air pipe 51, the density of supernatant in the pipe is reduced, and the density difference between the supernatant in the material lifting pipe 53 and the supernatant in the settling tank 9 is ensured, so that the supernatant in the pipe flows upwards and enters the outer well 3 of the feed well through the chute 52 to be mixed with slurry. Through setting up air and carrying material diluting device 5, utilize compressed air to give the clear liquid of subsider 9 into the well 3 outside the feedwell, realize the purpose of supplementary dilution.
Specifically, the dilution port 31 and the air lifting dilution device 5 are provided in plurality. According to the requirement of engineering on dilution concentration, a plurality of dilution ports 31 and an air lifting and diluting device 5 are arranged. Dilution mouth 31 has set up 6 in this embodiment, and air carries material diluting device 5 to set up 4, and the more the dilution effect is better that dilutes mouth 31, air carries material diluting device 5's quantity.
Specifically, the annular flocculant adding device 6 comprises an annular pipeline 61, the annular pipeline 61 is arranged on the periphery of the feedwell inner well 2, and the annular pipeline 61 is provided with a plurality of nozzles 611 with downward openings, so that flocculant is added to the feedwell outer well 3 and mixed with slurry. By arranging the annular flocculating agent adding device 6, the slurry and the flocculating agent are fully mixed, enough flocculation time is provided, and the function of the flocculating agent is fully exerted.
Specifically, the lower wellhead diameter of the feedwell 3 is smaller than the wellbore diameter and smaller than the maximum diameter of the particulate plate 4. The slurry in the feeding well outer well 3 flows to the bulk material plate 4 through the lower well mouth by limiting the size of the lower well mouth of the feeding well outer well 3.
In particular, the feed pipe 1 is provided in several numbers. A plurality of feeding pipes 1 are arranged according to the requirement of engineering on the flow rate of slurry.
Specifically, the gradient of the conical shell part of the well 2 in the feed well is 30-60 degrees.
Specifically, the gradient of the bulk material plate 4 is 30-60 degrees.
The slurry flows down stably and uniformly at a proper speed by the slope limitation of the conical shell part of the well 2 and the bulk material plate 4 in the feeding well.
Although embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and not to be construed as limiting the present invention and that those skilled in the art may make modifications, alterations, substitutions and alterations to the above embodiments within the scope of the present invention.
Claims (8)
1. A dilution mixing flocculation feed well of a settling tank is characterized by comprising a feed well inner well (2), a feed well outer well (3), a material dispersing plate (4), a feed pipe (1), a dilution port (31) and an annular flocculant adding device (6), wherein the relative position of the feed well inner well (2) is higher than that of the feed well outer well (3);
the feeding well inner well (2) comprises a flow guide device (22) and an inner well wall (21), the flow guide device (22) is arranged inside the inner well wall (21), the flow guide device (22) is communicated up and down, the upper end of the flow guide device is a cylinder, the lower end of the flow guide device is a conical shell, the size of the small end of the conical shell is the same as that of the bottom end of the cylinder, the bottom edge of the conical shell is lower than that of the inner well wall (21), the feeding pipe (1) is communicated with the inner well wall (21) in a tangential direction, the connecting part of the feeding pipe (1) corresponds to the cylinder part of the flow guide device (22), slurry flows in an annular space formed by the inner well wall (21) and the cylinder part of the flow guide device (22) along the circumferential direction and flows to the feeding well outer well (3) along the conical shell part of the flow guide device (22) in the radial direction;
the dilution port (31) is arranged on the wall of the external well (3) of the feeding well and is positioned between the supernatant liquid level (7) of the settling tank (9) and the slurry liquid level (8) in the feeding well, and the supernatant liquid of the settling tank (9) flows into the external well (3) of the feeding well through the dilution port (31) to be mixed with the slurry;
the annular flocculant adding device (6) is arranged at the periphery of the feeding well inner well (2) to enable a flocculant to be added into the feeding well outer well (3) to be mixed with slurry;
a bulk material plate (4) is arranged below the feed well outer well (3), the bulk material plate (4) is a conical shell with the small end upwards, and the treated slurry flows into the settling tank (9) along the bulk material plate (4).
2. The dilution and mixing flocculation feedwell of the settling tank as claimed in claim 1, further comprising an air stripping dilution device (5), wherein said air stripping dilution device (5) comprises a compressed air pipe (51), a stripping pipe (53) and a chute (52), said stripping pipe (53) is disposed outside the feedwell outer well (3), the top end of the stripping pipe (53) is provided with the chute (52) connected to the feedwell outer well (3), and the lower end of the compressed air pipe (51) is disposed at the bottom inside the stripping pipe (53).
3. A settler diluted mixed flocculation feedwell as claimed in any one of claims 1 or 2, wherein said dilution openings (31) and air stripping diluter means (5) are provided in plurality.
4. A settler diluted mixed flocculation feedwell according to claim 1, wherein said annular flocculant addition means (6) comprises an annular conduit (61), said annular conduit (61) being disposed around the periphery of the inner well (2) of the feedwell, said annular conduit (61) being provided with a plurality of downwardly opening nozzles (611) for adding flocculant to the outer well (3) of the feedwell for mixing with the slurry.
5. A settler dilution mixed flocculation feedwell according to claim 1, wherein said feedwell outer well (3) has a lower wellhead diameter smaller than the well bore diameter and smaller than the maximum diameter of the particulate plate (4).
6. A settler diluted mixed flocculation feedwell according to claim 1, wherein said feed pipe (1) is provided in a plurality of numbers.
7. A settler dilution mixed flocculation feedwell according to claim 1, wherein said feedwell inner well (2) has a conical shell section slope of from 30 ° to 60 °.
8. The settler diluted mixed flocculation feedwell according to claim 1, wherein said bulk material plates (4) have a slope of 30 ° to 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211680875.1A CN115947429A (en) | 2022-12-27 | 2022-12-27 | Dilution mixing flocculation feed well of settling tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211680875.1A CN115947429A (en) | 2022-12-27 | 2022-12-27 | Dilution mixing flocculation feed well of settling tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115947429A true CN115947429A (en) | 2023-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211680875.1A Pending CN115947429A (en) | 2022-12-27 | 2022-12-27 | Dilution mixing flocculation feed well of settling tank |
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|---|---|
| CN (1) | CN115947429A (en) |
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2022
- 2022-12-27 CN CN202211680875.1A patent/CN115947429A/en active Pending
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