CN203683113U - Aluminium oxide mechanical stirring decomposing tank - Google Patents
Aluminium oxide mechanical stirring decomposing tank Download PDFInfo
- Publication number
- CN203683113U CN203683113U CN201420048804.4U CN201420048804U CN203683113U CN 203683113 U CN203683113 U CN 203683113U CN 201420048804 U CN201420048804 U CN 201420048804U CN 203683113 U CN203683113 U CN 203683113U
- Authority
- CN
- China
- Prior art keywords
- agitating vane
- layer
- stirring
- turning axle
- rotating shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title abstract description 13
- 238000010907 mechanical stirring Methods 0.000 title abstract description 8
- 239000002002 slurry Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 8
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 12
- 210000005056 cell body Anatomy 0.000 claims description 10
- 239000012716 precipitator Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 abstract description 13
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 abstract description 12
- 239000002245 particle Substances 0.000 abstract description 12
- 238000000354 decomposition reaction Methods 0.000 abstract description 11
- 229910021502 aluminium hydroxide Inorganic materials 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 229910001388 sodium aluminate Inorganic materials 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000004913 activation Effects 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 241001522296 Erithacus rubecula Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
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- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The utility model discloses an aluminium oxide mechanical stirring decomposing tank. The aluminium oxide mechanical stirring decomposing tank is characterized in that a motor system (4) and a speed control system (3) are installed at the top of a tank body (1); a rotating shaft (9) is installed in the tank body (1) and is connected with the speed control system (3); three layers of stirring blades (8) are only arranged on the rotating shaft (9) along the longitudinal direction; the first layer of stirring blades (8) are installed at the upper part of the rotating shaft (9) and below the liquid level of decomposing slurry; the second layer of stirring blades (8) are installed in the middle of the rotating shaft (9); the third layer of stirring blades (8) are installed at the lower part of the rotating shaft (9). The aluminium oxide mechanical stirring decomposing tank reduces the arrangement density of axial mechanical stirring blades, effectively reduces the probability of collision and breaking of aluminium hydroxide crystalline particles, improves the growth environment of the crystalline particles for decomposition reaction, is beneficial to improving the product granularity, simultaneously simplifies the stirring structure of the decomposing tank, reduces the investment in the stirring equipment, reduces the stirring power and energy consumption and saves the energy.
Description
Technical field
The utility model relates to a kind of aluminum oxide mechanically agitated precipitator, relates in particular to a kind of mechanical agitation type cylindrical aluminium acid sodium solution decomposition of crystal seed groove of producing aluminium hydroxide.
Background technology
In aluminum oxide production process, the decomposition of crystal seed of sodium aluminate solution is to add decomposer carry out the induced crystallization of aluminum hydroxide crystals and grow up a large amount of crystal seeds, makes oversaturated decomposing sodium aluminate solution.This process is one of critical process of controlling alumina product technico-economical comparison.The major equipment using in decomposition of crystal seed process is decomposition of crystal seed groove, is called for short decomposer.Present stage, the decomposition of crystal seed of sodium aluminate solution mostly adopts the flat decomposer of mechanical stirring, 14 meters of diameters, and high more than 30 meters, volume is more than 4000 cubic metres.For this large-scale chemical reaction equipment, conventionally need to configure a set of mechanical stirring device, generally comprise the turning axle of motor, speed change system, height same with cell body and be arranged on the agitating vane on turning axle.In traditional decomposition technique, think always and be uniformly mixed strength degradation, aluminium hydroxide solid phase particles in solution can sink fast, cause buildup, stop up, the phenomenons such as deep gouge, think and pursue strong being uniformly mixed, to make the mixing that suspends completely of crystalline particle in decomposing solution, guarantee to produce continuous and stable prerequisite, therefore, existing decomposer is in order to pursue good mixed effect, 5 layers of agitating vane have been installed from top to bottom on turning axle, every layer of agitating vane is made up of 2 blades, amount to 10, the length of every blade is 4～5.5 meters, symmetry is arranged on turning axle, when running, power demand is about 55～75 kilowatts.One group of complete Production Flow Chart need to configure 12～14 of such decomposers, approximately 400,000 tons of corresponding production capacities, every decomposer all will configure above-mentioned 5 layers of agitating vane and power, continuous operation, do not stop production, do not stop, not only need to consume a large amount of electric energy, and cause the expensive of whole stirring system, and because agitating vane is of five storeys vertically, blade is too high in axial distribution density, and stir rotary shaft rotating speed and be generally 4.8rpm, be converted into the linear velocity at main agitating vane place (diameter is at 8～10 meters of of φ) 2～2.5 meters of left and right, the speed that blade and crystalline aluminum hydroxide particle collide is mutually larger, thereby cause flowing to from groove top bottom land, most of crystalline particle of growing up is gradually subject to blade stirring, collision and broken probability is higher, make product granularity refinement, the probability that obtains coarse particles aluminum oxide reduces greatly.In fact, because the activation energy of aluminum hydroxide crystals growth is higher, be uniformly mixed the essential factor that is not to affect reaction efficiency, therefore, except processing parameter, the improvement of resolving device is also to obtain one of important factor of coarse particles product.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of aluminum oxide mechanically agitated precipitator, meeting under the condition of sodium aluminate solution slurry crystallization reaction, reduce the collision in crystalline aluminum hydroxide particle growth process, broken probability, improve the environment of growing up of crystalline aluminum hydroxide particle.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
A kind of aluminum oxide mechanically agitated precipitator.Its formation comprises decomposer tank, charging chute, discharging chute, carries material airduct and discharge nozzle, at the top of cell body, electric system and speed change system are housed, turning axle is housed in cell body, turning axle is connected with speed change system, the agitating vane that haves three layers is longitudinally only set on described turning axle, the 1st layer of agitating vane is contained in the top of turning axle, decomposes below the liquid level of slurry; The 2nd layer of agitating vane is contained in the middle part of turning axle, and the 3rd layer of agitating vane is contained in the bottom of turning axle.
Above-mentioned aluminum oxide mechanically agitated precipitator, in 3 layers of described agitating vane, the blade quantity of every layer of agitating vane can be 1, can be also more than 2.
Aforesaid aluminum oxide mechanically agitated precipitator, in 3 layers of described agitating vane, the mounting means of neighbouring two-layer agitating vane can be to be parallel to each other to install or be staggered installation of.
The beneficial effects of the utility model: compared with 5 layers of agitating vane of prior art, stirring system of the present utility model only adopts 3 layers of agitating vane, greatly reduce in decomposer the density of arranging of mechanical stirring blade vertically, the collision of crystalline aluminum hydroxide particle, broken probability are effectively reduced, the environment of growing up that has improved decomposition reaction crystalline particle, is conducive to improve product granularity; Meanwhile, also simplify the whipped-up structure of decomposer, reduced whipping device investment, reduced power of agitator and energy consumption, saved the energy.
The utility model only adopts 3 layers of agitating vane just can meet sodium aluminate solution flow rate of slurry at 600～1400m
3within the scope of/h, aluminium hydroxide crystal seed crystallization reaction is produced required processing condition continuously, and its theoretical foundation is because the activation energy of aluminum hydroxide crystals growth is higher, is uniformly mixed the essential factor that is not to affect reaction efficiency.The viscosity of current refined high density supersaturated sodium aluminate solution is higher, Gu containing also very high, fractional solid volume accounts for more than 30%, and the aluminium hydroxide solid particulate of crystallization is mostly in tens micron dimensions, such a solid-liquid two-phase system, in settling process, the interference effect between effect of dragging and the solid particulate of liquid to solid particulate, cause the settling velocity of solid particulate slower, (approximately 600～1400m in completely normal decomposition production operation flow range
3/ h), even if stop stirring completely, can not cause at short notice in decomposer axially solid containing poor sharply variation yet.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment
Embodiment 1.As shown in Figure 1, comprise decomposer tank 1, carry material airduct 5 and discharge nozzle 7, cell body 1 is cylindrical decomposer, cell body 1 is provided with charging chute 2 and discharging chute 6, the side that discharge nozzle 7 is arranged in decomposer communicates with discharging chute 6, one end mouth of pipe of discharge nozzle 7 is inserted into the flat place of decomposer, carries and expects that airduct 5 rises liquid principle by air and is inserted in discharge nozzle 7, submits slurry outside decomposer.Electric system 4 and speed change system 3 are housed at the top of cell body 1, turning axle 9 is housed in cell body 1, this turning axle 9 is arranged on the axle center place of cylinder decomposer, and height is identical with decomposer.Turning axle 9 is connected with speed change system 3.The agitating vane 8 that haves three layers is longitudinally only set on turning axle 9, the 1st layer of agitating vane 8 is wherein contained in the top of turning axle 9, decompose below the liquid level A of slurry, be the inflow of plume state owing to decomposing slurry from the charging chute 2 of decomposer body side surface, this layer of stirring can make the slurry just having entered in decomposer upper area, along mixing in the direction parallel with groove face, build good initial stage decomposition reaction environment, enter into subsequently the stable crystalline particle reaction process of growing up; The 2nd layer of agitating vane 8 is contained in the middle part of turning axle 9, due to decomposer higher (more than 30 meters), slurry is longer by the time of a decomposer, about about 4 hours, one deck agitating vane is arranged at middle part at turning axle, can make the slurry that had reacted the half section time be mixed, be conducive to improve the reaction environment of lower semisection time; The 3rd layer of agitating vane 8 is contained in the bottom of turning axle 9, and the slurry of bottom part of decomposer is mixed, and avoids solid-liquid to separate, and is convenient to crystalline particle product and discharges from discharge nozzle 7, instead of produce accumulation at bottom land.In 3 layers of agitating vane 8, the blade quantity of every layer of agitating vane can be more than 2 or 2, can be also 1.The vane type of every layer of agitating vane can be the common type such as ROBIN, INTERMIG, PBT, HPM or CBY, also designed, designed according to demand.In 3 layers of agitating vane 8, the mounting means of neighbouring two-layer agitating vane can be the installation that is parallel to each other, and also can be staggered installation of.
When work, electric system 4 by output power through speed change system 3, turning axle 9 is delivered on agitating vane 8, sodium aluminate solution slurry enters decomposer from charging chute 2, after agitating vane 8 (top) mixes, start stable growth process, approximately through about 2 hours, arrive decomposer medium position, after being uniformly mixed of agitating vane 8 (middle part), decomposition reaction environment is improved, continue the reaction process of down growing up, arrived after bottom part of decomposer through 2 hours again, being uniformly mixed through agitating vane 8 (bottom) again, carrying under the effect of material airduct 5, by discharge nozzle 7, discharge outside decomposer through discharging chute 6.
Embodiment of the present utility model is not limited to above-described embodiment, within the various variations of making under the prerequisite that does not depart from the utility model aim all belong to protection domain of the present utility model.
Claims (4)
1. an aluminum oxide mechanically agitated precipitator, comprise cell body (1), charging chute (2), discharging chute (6), carry material airduct (5) and discharge nozzle (7), electric system (4) and speed change system (3) are housed at the top of cell body (1), turning axle (9) is housed in cell body (1), turning axle (9) is connected with speed change system (3), it is characterized in that: the agitating vane (8) that haves three layers is longitudinally only set on described turning axle (9), the 1st layer of agitating vane (8) is contained in the top of turning axle (9), decompose below the liquid level of slurry, the 2nd layer of agitating vane (8) is contained in the middle part of turning axle (9), and the 3rd layer of agitating vane (8) is contained in the bottom of turning axle (9).
2. aluminum oxide mechanically agitated precipitator according to claim 1, is characterized in that: in described 3 layers of agitating vane (8), the blade quantity of every layer of agitating vane is more than 1 or 2.
3. aluminum oxide mechanically agitated precipitator according to claim 1 and 2, is characterized in that: in described 3 layers of agitating vane (8), neighbouring two-layer agitating vane is parallel installation.
4. aluminum oxide mechanically agitated precipitator according to claim 1 and 2, is characterized in that: in described 3 layers of agitating vane (8), neighbouring two-layer agitating vane is to be staggered installation of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420048804.4U CN203683113U (en) | 2014-01-17 | 2014-01-17 | Aluminium oxide mechanical stirring decomposing tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420048804.4U CN203683113U (en) | 2014-01-17 | 2014-01-17 | Aluminium oxide mechanical stirring decomposing tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203683113U true CN203683113U (en) | 2014-07-02 |
Family
ID=51005046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420048804.4U Expired - Lifetime CN203683113U (en) | 2014-01-17 | 2014-01-17 | Aluminium oxide mechanical stirring decomposing tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203683113U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105523574A (en) * | 2014-09-30 | 2016-04-27 | 冀宣名 | Compact agitated precipitator |
| CN107555456A (en) * | 2017-09-29 | 2018-01-09 | 广西信发铝电有限公司 | A kind of aluminum oxide decomposer stirring system |
-
2014
- 2014-01-17 CN CN201420048804.4U patent/CN203683113U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105523574A (en) * | 2014-09-30 | 2016-04-27 | 冀宣名 | Compact agitated precipitator |
| CN107555456A (en) * | 2017-09-29 | 2018-01-09 | 广西信发铝电有限公司 | A kind of aluminum oxide decomposer stirring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |
|
| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: GUIZHOU R & D CENTER ON MODERN MATERIALS Person in charge of patents Document name: Notice of Termination of Patent Rights |
|
| DD01 | Delivery of document by public notice |