CN201753269U - Two-stage fluidized bed provided with expanded setting chamber for producing aluminum fluoride by dry method - Google Patents
Two-stage fluidized bed provided with expanded setting chamber for producing aluminum fluoride by dry method Download PDFInfo
- Publication number
- CN201753269U CN201753269U CN2010202692663U CN201020269266U CN201753269U CN 201753269 U CN201753269 U CN 201753269U CN 2010202692663 U CN2010202692663 U CN 2010202692663U CN 201020269266 U CN201020269266 U CN 201020269266U CN 201753269 U CN201753269 U CN 201753269U
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- cylindrical shell
- stage fluidized
- fluidized bed
- aluminum fluoride
- upper strata
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The utility model discloses a two-stage fluidized bed provided with an expanded setting chamber for producing aluminum fluoride by the dry method. The two-stage fluidized bed comprises an upper-layer barrel and a lower-layer barrel. The two-stage fluidized bed is characterized in that the inner diameter of the upper-layer barrel is greater than that of the lower-layer barrel, the upper-layer barrel is made of common carbon steel, and the inner walls of the barrels are poured or built with lining bodies made of inorganic nonmetallic materials. The two-stage fluidized bed can greatly reduce the dosage of expensive nickelic alloy and meet the requirements of high-temperature resistance and corrosion resistance, thereby greatly lowering the equipment investment cost; moreover, the range of capacity adjustment becomes wider, and the tiny particles brought out from the fluidized bed become fewer, so as to realize the significant meaning in the requirement on raw material particles and the follow-up tail gas treatment.
Description
Technical field
The utility model relates to a kind of two-stage fluidized, particularly a kind of two-stage fluidized with dry production aluminum fluoride of expansion settling pocket.
Background technology
Aluminium fluoride product is mainly used in electrolysis aluminium metallurgy industry, is the flux in the Aluminum Electrolysis Production, is used to reduce electrolytical fusing point, improves electrolytical electric conductivity.Aluminum fluoride by dry process technology is a kind of under suspension or fluidized state, generates the technology of aluminum fluoride with gaseous hydrogen fluoride and solid-state aluminium hydroxide direct reaction.The product water-content of dry production is low, unit weight is high, can avoid " hydrolysis " reaction and minimizing to fly upward loss during use, reduces hydrofluoric discharging, reduces the loss of aluminum fluoride simultaneously.But the key equipment fluidized-bed of dry production aluminum fluoride, be material now for all adopting expensive Langaloy, to satisfy the requirement of corrosion-and high-temp-resistant, production investment cost height, the fluidized-bed levels barrel diameter of dry production aluminum fluoride is identical at present, and promptly the settling pocket of fluidized-bed is the same with the diameter of actual fluidized layer, and aluminum fluoride and aluminum hydroxide particles that some are trickle are taken out of fluidized-bed by air-flow easily, not only increase the pressure that follow-up equipment gathers dust, and can limit the output of aluminum fluoride fluidized-bed.
Summary of the invention
The purpose of this utility model is to provide a kind of two-stage fluidized with dry production aluminum fluoride of expansion settling pocket, this device is not only simple in structure, low cost of manufacture, and can obviously reduce the amount that fine particle is taken out of fluidized-bed, can reduce the dedusting pressure of follow-up equipment.
The technical solution of the utility model is: a kind of two-stage fluidized with dry production aluminum fluoride of expansion settling pocket, comprise upper strata cylindrical shell and lower floor's cylindrical shell, it is characterized in that: the internal diameter of described upper strata cylindrical shell is greater than the internal diameter of lower floor's cylindrical shell, described upper strata cylindrical shell adopts plain carbon stool to make, and the inner lining body that ceramic is made is built or be cast with to cylinder inboard wall by laying bricks or stones.
Advantage of the present utility model is: can reduce the consumption of expensive Langaloy, save cost of investment; The gas distribution grid of described fluidized-bed lower floor cylindrical shell, fluidized-bed and the upflow tube between the two-layer fluidized-bed layer, tremie pipe and up and down top cover etc. all adopt corrosion-resistant, resistant to elevated temperatures special stainless steel to make, can satisfy the requirement of reaction process corrosion-and high-temp-resistant; The upper strata cylindrical shell adopts plain carbon stool cylindrical shell and liner ceramic to build by laying bricks or stones or pour into a mould, and the actual inner diameter behind the cylindrical shell liner of upper strata is greater than the internal diameter of lower shell.Device structure is simple, greatly reduces the facility investment expense; The production capacity regulation range is wide, and the amount that fine particle is taken out of fluidized-bed obviously reduces, and can reduce the dedusting pressure of follow-up equipment.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
With reference to figure 1, a kind of two-stage fluidized with dry production aluminum fluoride of expansion settling pocket, comprise upper strata cylindrical shell 1 and lower floor's cylindrical shell 2, it is characterized in that: the internal diameter of described upper strata cylindrical shell is greater than the internal diameter of lower floor's cylindrical shell, described upper strata cylindrical shell adopts plain carbon stool to make, and the inner lining body 3 that ceramic is made is built or be cast with to cylinder inboard wall by laying bricks or stones.
The liner of upper strata cylindrical shell is graphite or refractory materials.
The internal diameter of upper strata cylindrical shell forms the interior expansion settling pocket of bed greater than the internal diameter of lower floor's cylindrical shell, described lower floor cylindrical shell internal upper part is provided with the grid distributor 4 of going to bed, the bottom is provided with the grid distributor 5 of leaving the bed, and the outside, described lower floor cylindrical shell bottom has discharge port 7, and the cone that is positioned at the grid distributor below of leaving the bed has inlet mouth 6.
Be provided with overflow device 8 between described upper strata cylindrical shell and the lower floor's cylindrical shell.
Working process of the present utility model is as follows:
The upper strata temperature of reaction is controlled at about 300-400 ℃, lower floor's temperature of reaction is controlled at about 500-600 ℃, system operates under little negative pressure condition, aluminum hydroxide particles enters fluidized-bed upper strata cylindrical shell through feed-pipe, the aluminum hydroxide particles that hydrogen fluoride gas that enters from fluidized-bed bottom inlet mouth and upper strata add carries out fierce gas-solid reaction double-layer fluidized bed bioreactor, gas is 9 extractions from the air outlet, and the aluminum fluoride finished product is discharged from lower floor's fluidized layer side discharge port of the anti-device of two-stage fluidized.
In sum, since the upper strata cylindrical shell after having built or poured into a mould the liner that ceramic makes by laying bricks or stones its internal diameter still greater than the internal diameter of lower floor cylindrical shell, therefore the upper strata cylindrical shell has formed the settling pocket of expansion, can reduce solid particulate and be taken out of the quantity of fluidized-bed, and adopt plain carbon stool to make the wall of the outer-rotor of upper strata cylindrical shell, then can reduce production costs greatly, therefore the utlity model has stronger practical and generalization.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (4)
1. two-stage fluidized of dry production aluminum fluoride with expansion settling pocket, comprise upper strata cylindrical shell and lower floor's cylindrical shell, it is characterized in that: the internal diameter of described upper strata cylindrical shell is greater than the internal diameter of lower floor's cylindrical shell, described upper strata cylindrical shell adopts plain carbon stool to make, and the inner lining body that ceramic is made is built or be cast with to cylinder inboard wall by laying bricks or stones.
2. the two-stage fluidized with dry production aluminum fluoride of expansion settling pocket according to claim 1, it is characterized in that: the liner of upper strata cylindrical shell is graphite or refractory materials.
3. the two-stage fluidized with dry production aluminum fluoride of expansion settling pocket according to claim 1, it is characterized in that: the internal diameter of upper strata cylindrical shell forms the interior expansion settling pocket of bed greater than the internal diameter of lower floor's cylindrical shell, described lower floor cylindrical shell internal upper part is provided with the grid distributor of going to bed, the bottom is provided with the grid distributor of leaving the bed, the outside, described lower floor cylindrical shell bottom has discharge port, and the cone that is positioned at the grid distributor below of leaving the bed has inlet mouth.
4. the two-stage fluidized with dry production aluminum fluoride of expansion settling pocket according to claim 1 is characterized in that: be provided with overflow device between described upper strata cylindrical shell and the lower floor's cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202692663U CN201753269U (en) | 2010-07-23 | 2010-07-23 | Two-stage fluidized bed provided with expanded setting chamber for producing aluminum fluoride by dry method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202692663U CN201753269U (en) | 2010-07-23 | 2010-07-23 | Two-stage fluidized bed provided with expanded setting chamber for producing aluminum fluoride by dry method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201753269U true CN201753269U (en) | 2011-03-02 |
Family
ID=43621000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202692663U Expired - Lifetime CN201753269U (en) | 2010-07-23 | 2010-07-23 | Two-stage fluidized bed provided with expanded setting chamber for producing aluminum fluoride by dry method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201753269U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106076204A (en) * | 2016-08-10 | 2016-11-09 | 茂名重力石化机械制造有限公司 | A kind of pressure vessel and air inlet thereof |
-
2010
- 2010-07-23 CN CN2010202692663U patent/CN201753269U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106076204A (en) * | 2016-08-10 | 2016-11-09 | 茂名重力石化机械制造有限公司 | A kind of pressure vessel and air inlet thereof |
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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: 20110302 |
|
| CX01 | Expiry of patent term |