CN110194473A - A kind of alumina producing seed precipitation tank - Google Patents
A kind of alumina producing seed precipitation tank Download PDFInfo
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- CN110194473A CN110194473A CN201910469915.XA CN201910469915A CN110194473A CN 110194473 A CN110194473 A CN 110194473A CN 201910469915 A CN201910469915 A CN 201910469915A CN 110194473 A CN110194473 A CN 110194473A
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- China
- Prior art keywords
- precipitation tank
- seed precipitation
- tank body
- guide shell
- propeller
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
A kind of alumina producing seed precipitation tank, belong to technical field of alumina production, the technical issues of solving bottom aggradation in seed precipitation tank body, the present apparatus includes motor, agitating paddle and seed precipitation tank body, seed precipitation tank body sidewall top is provided with feed pipe, extraction pipe is provided with on the side wall of feed pipe opposite side seed precipitation tank body, motor is set to the top of seed precipitation tank body upper cover center portion, the rotor of motor passes through retarder and stirring axis connection, agitating shaft lower end extends at 0.53 times away from seed precipitation tank body bottom groove body diameter, two oblique leaf paddles are provided at agitating shaft top 2/5ths, the lower end of agitating shaft is provided with propeller；The bottom surface of seed precipitation tank body is set as hyperboloid bottom, and the upper end surface of guide shell is set as the first horn mouth being open upwards, and downward open second horn mouth is set as at lower end surface.The present invention makes the slurry in seed precipitation tank form stable circulation under guide shell guide functions, alleviates the phenomenon that scabs in seed precipitation tank, improves aluminium oxide output and quality, reduces energy consumption.
Description
Technical field
The invention belongs to technical field of alumina production, and in particular to be a kind of alumina producing seed precipitation tank.
Background technique
Currently, the alumina producing in 90% or more the whole world is realized by Bayer process.Decomposition of crystal seed is Bayer process production
One critical process of aluminium oxide.Wherein, the decomposition of crystal seed influential effect of sodium aluminate solution aluminium oxide quality and production effect
Rate.During decomposition of crystal seed, crystals in suspension state can be made by reinforcing stirring intensity, and is kept good with solution and contacted,
Contact surface between increasing liquid admittedly, grows crystal Quick uniform, to improve solution output capacity and finished product quality of alumina.
But the slot bottom problem of scabbing is a common technical problem of Bayer process.In practical application in industry, tank bottom scabs
Up to 5.9 meters, and be scleroma scar.The volume of agitator tank is not only reduced, and has severely impacted mixing plant just
Often operation, needs periodic cleaning, so that cost greatly increases, production efficiency also decreases.
Therefore, how effectively to solve the problems, such as the bottom aggradation of seed precipitation tank, reduce power consumption, the mixture homogeneity for improving stirring is
The critical issue for needing to solve in agitating device optimization design.
Summary of the invention
The purpose of the present invention is: in order to solve the technical issues of slot bottom scabs in seed precipitation tank body, the present invention provides a kind of oxygen
Change aluminium production and uses seed precipitation tank.
The present invention is achieved by the following technical programs.
A kind of alumina producing seed precipitation tank, it includes motor, agitating paddle and seed precipitation tank body, in which: the seed precipitation tank body
The top of side wall is provided with the feed pipe for reaction mass addition, and is arranged on the side wall of feed pipe opposite side seed precipitation tank body
There is extraction pipe, the motor is set to the top of seed precipitation tank body upper cover center portion, and the rotor of motor is connected by retarder and agitating shaft
It connects, the lower end of agitating shaft extends at 0.53 times away from seed precipitation tank body bottom groove body diameter, the agitating shaft top 2/5ths
Place is provided with two oblique leaf paddles, and the lower end of agitating shaft is provided with propeller；
The bottom surface of the seed precipitation tank body is set as hyperboloid bottom, and guide shell is fixedly mounted on side in seed precipitation tank body by support rod
The lower end of wall, and propeller is located in guide shell, and the upper end surface of guide shell is set as the first horn mouth being open upwards, and leads
Downward open second horn mouth is set as at the lower end surface of flow cartridge, the diameter of guide shell is 0.6 times of seed precipitation tank body diameter.
Further, the rotor of the motor is connected by the power input shaft of shaft coupling and retarder, and retarder moves
Power output shaft passes through shaft coupling and stirring axis connection.
Further, the lower end of the extraction pipe extends to the top of guide shell.
Further, the lower end surface of the extraction pipe is set as arcwall face.
Further, the diameter ratio of the diameter of described two oblique leaf paddles and seed precipitation tank body is 0.5, the tilt angle of two oblique leaf paddles
It is 45 degree；The diameter of the propeller and the diameter ratio of seed precipitation tank body are 0.33, and propeller is provided with three pieces blade.
Further, the distance between described two oblique leaf paddles and propeller are 1.5 times of two oblique leaf paddle diameters.
Compared with prior art, the invention has the benefit that
A kind of alumina producing seed precipitation tank provided by the invention, slurry flow downward in guide shell, are ejected into guide shell bottom
The slurry in portion washes away the particle of seed precipitation tank bottom, enters them between guide shell and cell wall, and re-circulation is got up,
Can be relieved seed precipitation tank to scab phenomenon, to improve aluminium oxide output and quality, reduce energy consumption and promote aluminum oxide industry technology into
Step all has important theoretical and practical significance.
Detailed description of the invention
Fig. 1 is seed precipitation tank schematic diagram of main cross-sectional structure, and dotted line and arrow indicate material recycle stream line in Fig. 1；
Fig. 2 is two oblique leaf paddle schematic view of the front view；
Fig. 3 is propeller schematic diagram of main cross-sectional structure；
Fig. 4 is the overlooking structure diagram of propeller.
In figure, 1 is motor, and 2 be retarder, and 3 be extraction pipe, and 4 be support rod, and 5 be guide shell, and 6 be hyperboloid bottom, 7
It is two oblique leaf paddles for propeller, 8,9 be feed pipe.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
A kind of alumina producing seed precipitation tank as shown in Figures 1 to 4, it includes motor, agitating paddle and seed precipitation tank body,
In: the top of the seed precipitation tank body sidewall is provided with the feed pipe 9 for reaction mass addition, with 9 opposite side kind of feed pipe
Divide on the side wall of groove body and be provided with extraction pipe 3, the motor 1 is set to the top of seed precipitation tank body upper cover center portion, the rotor of motor 1
By retarder 2 and stirring axis connection, the lower end of agitating shaft is extended at 0.53 times away from seed precipitation tank body bottom groove body diameter, institute
It states and is provided with two oblique leaf paddles 8 at agitating shaft top 2/5ths, the lower end of agitating shaft is provided with propeller 7；
The bottom surface of the seed precipitation tank body is set as hyperboloid bottom 6, using hyperbolic groove structure, flows trace, liquid by fluid
Continued to flow upwards by its guidance when flowing down through trench bottom by propeller 7, conducive to the formation for stablizing circulation；Water conservancy diversion
Cylinder 5 is fixedly mounted on the bottom of side wall in seed precipitation tank body by support rod 4, and propeller 7 is located in guide shell 5, guide shell 5
Upper end surface be set as the first horn mouth being open upwards, downward open second loudspeaker is set as at the lower end surface of guide shell 5
Mouth, the diameter of guide shell 5 are 0.6 times of seed precipitation tank body diameter, are sufficiently cooperated with propeller, guide shell 5 promotes seed precipitation tank body
Middle material recycles up and down, achievees the purpose that stir evenly with lower power.
Point two layers of setting blender, is uniformly distributed material in entire seed precipitation tank in seed precipitation tank.In the driving of motor
Under, it presets agitating paddle and is rotated with certain revolving speed, the liquid and solid particle in this time slot start under the agitation of agitating paddle
Movement.Traditionally, since flow field turbulent extent is smaller, if stirring cannot provide enough suspending powers, particle is in weight
Assemble under power effect to slot bottom, and top particles concentration is relatively low, upper and lower concentration distribution is uneven.In the present invention, work as leaf
When piece rotates, surrounding fluid is continuously driven, and is flowed up under guide shell guidance, and stable circulation is formed.
There is a large amount of inefficient area in traditional seed precipitation tank, this region is more compared with middle part in slot bottom side, in this region
Interior stirring efficiency is low, and uniformity is poor, constrains the performance of mixing plant efficiency, can effectively avoid poor efficiency using the present apparatus
The generation in area.
In traditional seed precipitation tank, upper blade position is too low, and slot internal upper part liquid cannot be sufficiently stirred, and leads to a large amount of
Grain is deposited on bottom；Blade is excessively high, and the material of slot bottom cannot be sufficiently stirred.The application uses axial circulating current, makes trench bottom object
Material is sufficiently mixed, and achievees the purpose that improve production efficiency.In traditional whipping process, the turbulent extent in flow field is smaller, can mention
The levitation power of confession is also smaller, and particle causes at slot bottom center under the effect of gravity to congregate and particle is dense at cell wall
Spend relatively high, therefore the underface of agitating paddle has stirring " blind area ", and particle is easy aggregation in this position, and generation scabs.This
Invention can effectively avoid the generation of such blind area using hyperboloid bottom structure.Agitating paddle design of the present invention makes stirred tank bottom liquid
Sufficiently flowing, liquid upper obtain more stirrings, lamination be improved significantly.
When bottom is dish in the prior art, propeller is closer apart from distance from bottom, more has to the particle suspension of bottom
Benefit, but it is uneven to will lead to supernatant liquid mixing.Hyperboloid bottom 6 can guarantee propeller 7 can compared with liquid under the slow-speed of revolution
It sufficiently suspends, while also the blade of propeller 7 need not be placed into lower position exclusively for slot bottom particle has been stirred, cause
Square solid-liquid density unevenness phenomenon.Though classical dish-like shapes bottom alleviates liquid to a certain extent and scabs situation, in practical application
In, possibly it can not play very big anti-deposition.Hyperboloid bottom 6 provided by the invention, groove design increase circulation
Efficiency, reduce it is unnecessary scab and deposit, and than flat energy saving 40%, improve production efficiency.
The structure of guide shell 5 is designed according to propeller flow pattern, the upper and lower ends of guide shell 5 have certain arc of curvature
Degree is conducive to Matter Transfer.Support rod 4 in 5 support construction of guide shell is airflow design, utmostly mitigates fluid flowing resistance
Power.
Compared with tradition machinery paddling process, agitating device provided by the invention avoid power of agitator it is big, easily deposition scab,
The disadvantages of being also easy to produce impurity, easily causing slurry short-circuit.Seed precipitation tank cleaning cycle is extended, seed precipitation tank safety and stability is enable to transport
Row.
Further, the rotor of the motor 1 is connect by shaft coupling with the power input shaft of retarder 2, retarder 2
Power output shaft passes through shaft coupling and stirring axis connection.
Further, the lower end of the extraction pipe 3 extends to the top of guide shell 5.
Further, the lower end surface of the extraction pipe 3 is set as arcwall face.
Further, the diameter ratio of the diameter of described two oblique leaf paddles 8 and seed precipitation tank body is 0.5, the inclination angle of two oblique leaf paddles 8
Degree is 45 °；The diameter of the propeller 7 and the diameter ratio of seed precipitation tank body are 0.33, and propeller 7 is provided with three pieces blade.Two tiltedly
Leaf paddle 8 and the blade length of propeller 7 are moderate, the too long abrasion that can aggravate blade of length of blade, increase energy consumption.In view of kind point
Groove body lower part is main stirring area, blade length is set as 0.33 times of seed precipitation tank body diameter, this length is conducive to blade and water conservancy diversion
The cooperation of cylinder 5 decreases and increases paddle diameter and increased power consumption, is more suitably applied in actual production.
The blade of two oblique leaf paddles 8 and propeller 7 is all made of conventional traditional paddle blade structure, and easy to process, accessory is easily replaced, benefit
In industrialization, among practice of conveniently putting into production.
Two oblique leaf paddles 8 are compared with straight oar, and oblique leaf paddle power consumption is less, and manufacturing cost is lower.Two oblique leaf paddles 8 have axial direction, diameter
To, it is circumferential shunt, mixing effect is good.Propeller 7 is axially having very big delivery flow, compared with common flat paddle, can consume
Biggish circular flow is obtained in the lesser situation of power, 7 structure of propeller is simple, and shear action is little, is conducive to aluminium hydroxide
Generation.
Further, the distance between described two oblique leaf paddles 8 and propeller 7 are 1.5 times of two oblique 8 diameters of leaf paddle, in this way
Not only it can guarantee that solution was all adequately mixed in entire seed precipitation tank body, but also can be excessive to avoid distance between blade, it can not
Secondary cycle stream is formed, and the oblique leaf paddle 8 of rationally setting two and the spacing of propeller 7 can form a wide range of ring under smaller revolving speed
Stream, makes bottom particles be more evenly distributed.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
It is familiar with those skilled in the art in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (6)
1. a kind of alumina producing seed precipitation tank, it includes motor, agitating paddle and seed precipitation tank body, it is characterised in that: described kind point
The top of groove body side wall is provided with the feed pipe (9) for reaction mass addition, with feed pipe (9) opposite side seed precipitation tank body
It is provided on side wall extraction pipe (3), the motor (1) is set to the top of seed precipitation tank body upper cover center portion, and the rotor of motor (1) is logical
Retarder (2) and stirring axis connection are crossed, the lower end of agitating shaft extends at 0.53 times away from seed precipitation tank body bottom groove body diameter, institute
It states and is provided with two oblique leaf paddles (8) at agitating shaft top 2/5ths, the lower end of agitating shaft is provided with propeller (7)；
The bottom surface of the seed precipitation tank body is set as hyperboloid bottom (6), and guide shell (5) is fixedly mounted on kind by support rod (4)
Divide the bottom of groove body inner sidewall, and propeller (7) is located in guide shell (5), the upper end surface of guide shell (5) is set as upward
Open first horn mouth, is set as downward open second horn mouth at the lower end surface of guide shell (5), guide shell (5) it is straight
Diameter is 0.6 times of seed precipitation tank body diameter.
2. a kind of alumina producing seed precipitation tank according to claim 1, it is characterised in that: the rotor of the motor (1)
It is connect by shaft coupling with the power input shaft of retarder (2), the power output shaft of retarder (2) passes through shaft coupling and agitating shaft
Connection.
3. a kind of alumina producing seed precipitation tank according to claim 1, it is characterised in that: under the extraction pipe (3)
End extends to the top of guide shell (5).
4. a kind of alumina producing seed precipitation tank according to claim 3, it is characterised in that: under the extraction pipe (3)
End face is set as arcwall face.
5. a kind of alumina producing seed precipitation tank according to claim 1, it is characterised in that: the two oblique leaf paddle (8)
The diameter ratio of diameter and seed precipitation tank body is 0.5, and the tilt angle of two oblique leaf paddles (8) is 45 degree；The diameter of the propeller (7) with
The diameter ratio of seed precipitation tank body is 0.33, and propeller (7) is provided with three pieces blade.
6. a kind of alumina producing seed precipitation tank according to claim 5, it is characterised in that: the two oblique leaf paddle (8) with
The distance between propeller (7) is 1.5 times of two oblique leaf paddle (8) diameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910469915.XA CN110194473A (en) | 2019-05-31 | 2019-05-31 | A kind of alumina producing seed precipitation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910469915.XA CN110194473A (en) | 2019-05-31 | 2019-05-31 | A kind of alumina producing seed precipitation tank |
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| Publication Number | Publication Date |
|---|---|
| CN110194473A true CN110194473A (en) | 2019-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910469915.XA Pending CN110194473A (en) | 2019-05-31 | 2019-05-31 | A kind of alumina producing seed precipitation tank |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115182056A (en) * | 2022-08-05 | 2022-10-14 | 江苏集萃先进纤维材料研究所有限公司 | Production equipment for bubble spinning nanofiber |
| CN115893460A (en) * | 2022-11-23 | 2023-04-04 | 中铝矿业有限公司 | Method and device for reducing separation of oxalate impurities in seed precipitation tank |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202951475U (en) * | 2012-11-28 | 2013-05-29 | 山东轻工业学院 | Hyperbolic bottom stirring reaction still |
-
2019
- 2019-05-31 CN CN201910469915.XA patent/CN110194473A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202951475U (en) * | 2012-11-28 | 2013-05-29 | 山东轻工业学院 | Hyperbolic bottom stirring reaction still |
Non-Patent Citations (1)
| Title |
|---|
| 田颐慧: "《化工设备》", 30 June 1999, 中国石化出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115182056A (en) * | 2022-08-05 | 2022-10-14 | 江苏集萃先进纤维材料研究所有限公司 | Production equipment for bubble spinning nanofiber |
| CN115893460A (en) * | 2022-11-23 | 2023-04-04 | 中铝矿业有限公司 | Method and device for reducing separation of oxalate impurities in seed precipitation tank |
| CN115893460B (en) * | 2022-11-23 | 2024-04-02 | 中铝矿业有限公司 | Method and device for reducing precipitation of oxalate impurities in seed precipitation tank |
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Application publication date: 20190903 |
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