CN201825742U - Sodium aluminate liquor plug flow decomposition device - Google Patents
Sodium aluminate liquor plug flow decomposition device Download PDFInfo
- Publication number
- CN201825742U CN201825742U CN201020542117XU CN201020542117U CN201825742U CN 201825742 U CN201825742 U CN 201825742U CN 201020542117X U CN201020542117X U CN 201020542117XU CN 201020542117 U CN201020542117 U CN 201020542117U CN 201825742 U CN201825742 U CN 201825742U
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- sodium aluminate
- plug flow
- decomposer
- feed
- aluminate liquor
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Abstract
The utility model discloses a sodium aluminate liquor plug flow decomposition device, belongs to a chemical crystallization device, and aims to provide a reaction device for decomposing supersaturated sodium aluminate liquor seed crystal, which is low in energy consumption and capable of improving aluminum hydroxide crystallization granularity. The sodium aluminate liquor plug flow decomposition device comprises a decomposer, a discharge chute, a discharge pipe, a rotating shaft and a lifting air duct, a motor and a speed reducing device are arranged on the top of the decomposer, the discharge chute is fixed into the decomposer, the discharge pipe is vertically fixed at the bottom of the discharge chute and communicated with the discharge chute, the rotating shaft penetrates out of the discharge pipe and is connected with the speed reducing device, and the lifting air duct is arranged in the discharge pipe. The sodium aluminate liquor plug flow decomposition device is characterized in that a collecting barrel (6) fixed onto the rotating shaft (3) is movably connected with the discharge pipe (4), at least one feed pipe (7) is fixed onto the collecting barrel (6) and communicated with the same, each feed pipe (7) is provided with a plurality of feed holes (8), and a sealing element is disposed between the collecting barrel (6) and the discharge pipe (4). The sodium aluminate liquor plug flow decomposition device has the advantages of large granularity of aluminum hydroxide and low equipment and manufacturing costs and power consumption, and is an ideal device for producing aluminum oxide.
Description
Technical field: the utility model relates to a kind of decomposition crystallization reaction device, relates in particular to a kind of supersaturated sodium aluminate solution and adds 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 of decision 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; In order to prevent that the aluminum hydroxide crystals that crystallization reaction produces from piling up at the decomposer bottom settlings, hydrolysis is lumpd and the blocking-up continuous production, all will in decomposer, erect usually that a mechanical stirring device that has multi-layer oar blade is set to be stirred incessantly.Though this powerful stirring can prevent xln and pile up at the decomposer bottom settlings, 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 refinement once more 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 to mix (being commonly called as " short circuit ") mutually, thereby cause product hierarchy to descend.In addition, because huge, the mechanical stirring device of decomposer also reaches tens of rice, it is bigger to stir load, therefore not only the manufacturing of members such as the stir shaft of agitator, agitating vane is had relatively high expectations, and energy consumption is also bigger.
Summary of the invention: at the above-mentioned defective that exists in the prior art, the utility model 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 utility model by the following technical solutions: it comprises that the top is fixed with the decomposer of electric motor and deceleration device, is fixed on discharging chute in this decomposer, vertically is fixed on this discharging chute bottom and the discharge nozzle that is communicated with it, passes turning axle that this discharge nozzle is connected with described deceleration device, is located at and carries the material airduct in this discharge nozzle; The aggregate tube and the discharge nozzle that are fixed on the turning axle flexibly connect, and at least one feed-pipe that is provided with some feed ports is fixed on the aggregate tube and connection with it; Be provided with sealing element between aggregate tube and the discharge nozzle.
Feed-pipe level or downward-sloping layout, feed port are distributed in the bottom and the termination of this feed-pipe.
Compared with the prior art, therefore the utility model has the following advantages owing to adopted technique scheme, makes a concrete analysis of as follows:
1) owing to increased members such as the aggregate tube that can rotate with turning axle and feed-pipe in the bottom of decomposer, therefore can realize the function of the even suction of big area, discharging, overcome the easily problem of precipitation buildup of decomposer bottom effectively in the decomposer bottom;
2) owing to cancelled some paddles of arranging, therefore alleviated the load of whipping appts greatly, not only can reduce and use electric consumption, but also reduced the manufacture difficulty of members such as turning axle, bearing along the turning axle multilayer;
3) owing to there is not the intensive stirring movement, there is not the powerful shearing force that causes that stirs in the sodium aluminate solution flow field in the decomposer, the solution crystallization reaction can not cause any stirring to carry out steadily, continuously like the mode of nearly " plug flow ", therefore the aluminum hydroxide crystals growth process can not destroyed, thereby is easy to obtain the bigger alumina product of granularity.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
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 utility model is described in further detail 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 connection with it, 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 connection with it, 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, enters the discharging chute 2 from discharge nozzle 4 then to be sent under the effect of carrying material airduct 10.
Claims (2)
1. sodium aluminate solution plug flow decomposition reaction apparatus comprises that the top is fixed with the decomposer of electric motor and deceleration device, is fixed on discharging chute in this decomposer, vertically is fixed on this discharging chute bottom and the discharge nozzle that is communicated with it, passes rotation axis that this discharge nozzle is connected with described deceleration device, is located at and carries the material airduct in this discharge nozzle; It is characterized in that: the aggregate tube (6) that is fixed on the rotation axis (3) flexibly connects with discharge nozzle (4), and at least one feed-pipe (7) that is provided with some feed ports (8) is fixed on aggregate tube (6) and goes up also connection with it; 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 is characterized in that: feed-pipe (7) level or downward-sloping layout, feed port (8) is distributed in the bottom and the termination of this feed-pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020542117XU CN201825742U (en) | 2010-09-26 | 2010-09-26 | Sodium aluminate liquor plug flow decomposition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020542117XU CN201825742U (en) | 2010-09-26 | 2010-09-26 | Sodium aluminate liquor plug flow decomposition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201825742U true CN201825742U (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020542117XU Expired - Lifetime CN201825742U (en) | 2010-09-26 | 2010-09-26 | Sodium aluminate liquor plug flow decomposition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201825742U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955212A (en) * | 2010-09-26 | 2011-01-26 | 苏向东 | Sodium aluminate solution plug-flow decomposition reactor |
| WO2013107120A1 (en) * | 2012-01-20 | 2013-07-25 | 贵州省新材料研究开发基地 | Process for producing aluminium hydroxide by seeded decomposition of supersaturated sodium aluminate solution |
-
2010
- 2010-09-26 CN CN201020542117XU patent/CN201825742U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101955212A (en) * | 2010-09-26 | 2011-01-26 | 苏向东 | Sodium aluminate solution plug-flow decomposition reactor |
| WO2013107120A1 (en) * | 2012-01-20 | 2013-07-25 | 贵州省新材料研究开发基地 | Process for producing aluminium hydroxide by seeded decomposition of supersaturated sodium aluminate solution |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110511 Effective date of abandoning: 20130327 |
|
| RGAV | Abandon patent right to avoid regrant |