CN101955212B - Sodium aluminate solution plug-flow decomposition reactor - Google Patents
Sodium aluminate solution plug-flow decomposition reactor Download PDFInfo
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- CN101955212B CN101955212B CN 201010291819 CN201010291819A CN101955212B CN 101955212 B CN101955212 B CN 101955212B CN 201010291819 CN201010291819 CN 201010291819 CN 201010291819 A CN201010291819 A CN 201010291819A CN 101955212 B CN101955212 B CN 101955212B
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Abstract
The invention discloses a sodium aluminate solution plug-flow decomposition reactor which belongs to chemical crystallization reactors. The invention aims to provide an oversaturated sodium aluminate solution inoculating crystal decomposition reactor, which has the advantage of low energy consumption and can enhance the crystal size of aluminium hydroxide. The sodium aluminate solution plug-flow decomposition reactor comprises a decomposing tank, a discharge chute, a discharge pipe, a rotating shaft and a lifting air pipe, wherein an electromotor and a reduction gear are fixed on the top of the decomposing tank; the discharge chute is fixed in the decomposing tank; the discharge pipe is vertically fixed on and communicated with the bottom of the discharge chute; the rotating shaft penetrates through the discharge pipe and is connected with the reduction gear; and the lifting air pipe is arranged in the discharge pipe. The invention is characterized in that a collection cylinder (6) fixed on the rotating shaft (3) is flexibly connected with the discharge pipe (4); at least one feed pipe (7) provided with a plurality of feed ports (8) is fixed on and communicated with the collection cylinder (6); and a sealing element is arranged between the collection cylinder (6) and the discharge pipe (4). The invention has the advantages of large grain size of aluminium hydroxide, low equipment manufacturing cost and low power consumption, thereby being an ideal device for producing aluminium hydroxide.
Description
Technical field: the present invention relates to a kind of decomposition crystallization reaction device, relate in particular to a kind of supersaturated sodium aluminate solution and add the reaction unit that aluminium hydroxide is produced in the decomposition of crystal seed crystallization.
Background technology: in the producing aluminium oxide by bayer flow process, decomposition of crystal seed is the key link of control the finished product aluminum oxide grain size, also be one of high energy consumption operation, its crystallization reaction process and reaction unit are the important factor that determines quality product and technico-economical comparison.Current, sodium aluminate solution adds decomposition of crystal seed and produces the decomposer that the aluminium hydroxide reaction unit adopts flat straight bucket cylindrical structure mostly; Blocking-up is produced continuously in order to prevent aluminum hydroxide crystals that crystallization reaction produces in bottom part of decomposer deposit buildup, hydrolysis caking, usually all will erect a mechanical stirring device with multi-layer oar blade is set stirs incessantly in decomposer.Although this strong stirring can prevent that xln is in the bottom part of decomposer deposit buildup, but the shearing force that produces in the sodium aluminate solution flow field can make the crystalline aluminum hydroxide growth process be destroyed on the one hand, cause the again refinement of xln, cause the finished product (aluminum oxide) granularity mostly between sand shape and powdery, do not reach the international standard requirement of sandy alumina product; Also can cause on the other hand between the upper and lower layer liquid mutually to mix (being commonly called as " short circuit "), thereby cause product hierarchy to descend.In addition, because huge, the mechanical stirring device of decomposer also reaches tens of rice, it is larger to stir load, therefore not only the manufacturing of the members such as the stir shaft of agitator, agitating vane is had relatively high expectations, and energy consumption is also larger.
Summary of the invention: for the defects that exists in the prior art, the present invention aim to provide a kind of easily manufactured, cost is low, energy consumption is little, can improve the sodium aluminate solution plug flow decomposition reaction apparatus of hydroxide particle-size.
To achieve these goals, the present invention is by the following technical solutions: it comprise the top be fixed with electric motor be connected with deceleration device decomposer, be fixed on discharging chute in this decomposer, vertically be fixed on this discharging chute bottom and the discharge nozzle that is communicated with it, pass turning axle that this discharge nozzle is connected with described deceleration device, be located at and carry the material airduct in this discharge nozzle; The aggregate tube and the discharge nozzle that are fixed on the turning axle are flexibly connected, and at least one feed-pipe that is provided with some feed ports is fixed on the aggregate tube and with it connection; Be provided with sealing element between aggregate tube and the discharge nozzle.
Feed-pipe level or downward-sloping layout, feed port are distributed in bottom and the termination of this feed-pipe.
Compared with the prior art, therefore the present invention has the following advantages owing to adopted technique scheme, makes a concrete analysis of as follows:
1) owing to increased the members such as the aggregate tube that can rotate with turning axle and feed-pipe in the bottom of decomposer, therefore can realize at bottom part of decomposer the function of Large-Area-Uniform suction, discharging, effectively overcome the problem that bottom part of decomposer easily precipitates buildup;
2) owing to cancelled some paddles of arranging along the turning axle multilayer, therefore greatly alleviate the load of whipping appts, not only can reduce and use electric consumption, but also reduced the manufacture difficulty of the members such as turning axle, bearing;
3) owing to there is not strong stirring movement, the shearing force that does not exist strong stirring to cause in the sodium aluminate solution flow field in the decomposer, the solution crystallization reaction can not cause to carry out steadily, continuously like the mode of nearly " plug flow " any stirring, therefore the aluminum hydroxide crystals growth process can not destroyed, thereby is easy to obtain the larger alumina product of granularity.
Description of drawings:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1.
Among the figure: decomposer 1 discharging chute 2 rotation axiss 3 discharge nozzles 4 deceleration device 5 aggregate tubes 6 feed-pipes 7 feed ports 8 are reinforced pull bar 9 and are carried material airduct 10
Embodiment: the invention will be further described below in conjunction with accompanying drawing and specific embodiment:
In Fig. 1～2, the top of decomposer 1 is fixed with the deceleration device 5 that is connected with electric motor, discharging chute 2 is fixed on the position at close top in the decomposer 1, the discharge nozzle 4 that vertically is located in this decomposer is fixed on the bottom of discharging chute 2 and with it connection, rotation axis 3 passes this discharge nozzle and is connected with deceleration device 5, is provided with carrying of being communicated with gas blower in the material pipe 4 and expects airduct 10; The aggregate tube 6 that is inserted in discharge nozzle 4 bottoms is connected with rotation axis 3 by spline, and feed-pipe 7 levels that four root bottom parts are provided with some feed ports 8 are distributed on the aggregate tube 6 and with it connection, are provided with sealing element between this aggregate tube and discharge nozzle 4.In order to increase feed-pipe 7 rigidity, be welded with between each feed-pipe 7 and the aggregate tube 6 and reinforce pull bar 9.
During work, described electric motor drives rotation axis 3, aggregate tube 6 and feed-pipe 7 by deceleration device 5 and slowly rotates, aluminum hydroxide slurry enters the aggregate tube 6 by feed-pipe 7 from opening for feed 8, then enters the discharging chute 2 from discharge nozzle 4 to be sent under the effect of carrying material airduct 10.
Claims (2)
1. sodium aluminate solution plug flow decomposition reaction apparatus, comprise the top be fixed with electric motor be connected with deceleration device decomposer, be fixed on discharging chute in this decomposer, vertically be fixed on this discharging chute bottom and the discharge nozzle that is communicated with it, pass rotation axis that this discharge nozzle is connected with described deceleration device, be located at and carry the material airduct in this discharge nozzle; It is characterized in that: the aggregate tube (6) that is fixed on the rotation axis (3) is flexibly connected with discharge nozzle (4), and at least one feed-pipe (7) that is provided with some feed ports (8) is fixed on the upper and with it connection of aggregate tube (6); Be provided with sealing element between aggregate tube (6) and the discharge nozzle (4).
2. sodium aluminate solution plug flow decomposition reaction apparatus according to claim 1, it is characterized in that: feed-pipe (7) level or downward-sloping layout, feed port (8) is distributed in bottom and the termination of this feed-pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010291819 CN101955212B (en) | 2010-09-26 | 2010-09-26 | Sodium aluminate solution plug-flow decomposition reactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010291819 CN101955212B (en) | 2010-09-26 | 2010-09-26 | Sodium aluminate solution plug-flow decomposition reactor |
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| CN101955212A CN101955212A (en) | 2011-01-26 |
| CN101955212B true CN101955212B (en) | 2013-03-27 |
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| CN 201010291819 Active CN101955212B (en) | 2010-09-26 | 2010-09-26 | Sodium aluminate solution plug-flow decomposition reactor |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102167374A (en) * | 2011-03-08 | 2011-08-31 | 贵州省新材料研究开发基地 | Horizontal pushing flow aluminum hydroxide crystallization reactor with convex cone bottom |
| CN102167375A (en) * | 2011-03-08 | 2011-08-31 | 贵州省新材料研究开发基地 | Aluminum hydroxide flat-bottom seed precipitation tank with multistage collection |
| CN102583474B (en) * | 2012-01-20 | 2014-08-27 | 贵州省新材料研究开发基地 | Process method for producing aluminum hydroxide by seed decomposition of supersaturated sodium aluminate solution |
| CN103964479B (en) * | 2013-01-28 | 2015-12-23 | 北京蓝天欣禾科技有限公司 | A kind of nano-aluminum hydroxide material and production technique thereof |
| CN106882828B (en) * | 2017-03-17 | 2018-05-04 | 中铝国际工程股份有限公司 | Low-pressure air dosage seed precipitation tank carries material device |
| CN107855033A (en) * | 2017-11-01 | 2018-03-30 | 安徽省林锦记食品工业有限公司 | A kind of jelly produces automatic material mixer in batches |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3607113A (en) * | 1969-02-24 | 1971-09-21 | Reynolds Metals Co | Continuous precipitation of alumina hydrate |
| CN101628726A (en) * | 2009-08-18 | 2010-01-20 | 胡大乔 | Cylindrical flow flat-bottom decomposing tank of sodium aluminate solution |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4530699A (en) * | 1979-01-18 | 1985-07-23 | Aluminum Company Of America | Dense phase precipitation |
| CN201825742U (en) * | 2010-09-26 | 2011-05-11 | 苏向东 | Sodium aluminate liquor plug flow decomposition device |
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2010
- 2010-09-26 CN CN 201010291819 patent/CN101955212B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3607113A (en) * | 1969-02-24 | 1971-09-21 | Reynolds Metals Co | Continuous precipitation of alumina hydrate |
| CN101628726A (en) * | 2009-08-18 | 2010-01-20 | 胡大乔 | Cylindrical flow flat-bottom decomposing tank of sodium aluminate solution |
Non-Patent Citations (1)
| Title |
|---|
| JP昭55-136121A 1980.10.23 |
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