CN106524730A - Aluminium hydroxide drying system and drying method thereof - Google Patents
Aluminium hydroxide drying system and drying method thereof Download PDFInfo
- Publication number
- CN106524730A CN106524730A CN201611142456.7A CN201611142456A CN106524730A CN 106524730 A CN106524730 A CN 106524730A CN 201611142456 A CN201611142456 A CN 201611142456A CN 106524730 A CN106524730 A CN 106524730A
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- Prior art keywords
- aluminium hydroxide
- cyclone separator
- pipeline
- level
- hot cyclone
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
Abstract
The invention relates to an aluminium hydroxide drying system and a drying method thereof. The method comprises the steps that wet aluminium hydroxide is dried through a Venturi drier and a second-stage preheating cyclone separator from a gaseous suspension roaster; then, after being cooled through a fluidizing cooler, a part of dry aluminium hydroxide enters a storage bin; a bag type dust collector and an electrical dust collector are utilized at the same time to recycle solids in the gas; and the other part of dry aluminium hydroxide enters a roasting main furnace through a second-stage preheating cyclone separator to be roasted, and the roasted dry aluminium hydroxide enters a third-stage preheating cyclone separator to be subjected to solid-gas separation. According to the aluminium hydroxide drying system and the drying method thereof, hot flue gas generated from roasting is utilized, so that compared with a traditional drying technology, the drying method is low in investment and is more energy-saving.
Description
Technical field
The present invention relates to a kind of drying system of aluminium hydroxide and its furnace drying method.
Background technology
Aluminium hydroxide is basic material necessary to aluminum electrolysis industry production aluminium fluoride, and its attached water content is 5%-10%,
And aluminum fluoride by dry process produces its technological requirement raw material aluminium hydroxide and attached water content must be made to use less than 0.1% side after drying
In production.
Traditional drying aluminium hydroxide device is dried usually using spin flash dryer or blade drier
Aluminium hydroxide, but legacy equipment, in order to ensure the moisture up to standard of product, the air themperature of emptying is high, causes the air of outer row to take away
Substantial amounts of heat energy, causes energy loss.
Traditional drying aluminium hydroxide system includes being fed, disperses, stops, dedusting, and used in system, equipment is more, process duct
Net system, electrical system and robot control system(RCS) are all more complicated, and system security and stability is poor, fault rate high, and system leak point is more, scene
Work under bad environment；Cause floor space big because of system complex, one-time investment is more.
The content of the invention
The purpose of the present invention is aiming at the deficiency that above-mentioned prior art is present, and removes attached water according in roaster principle
Function, make full use of roaster in existing production part construct and waste heat, there is provided a kind of drying system of aluminium hydroxide and
Its furnace drying method.
The purpose of the present invention is achieved through the following technical solutions.
A kind of drying system of aluminium hydroxide, including screw(-type) feeder 1, venturi drier 2, one-level preheating cyclonic separation
Device 3, two grades of pre- hot cyclone separators 4, fluidizing cooler 5, bagroom 7, dust collecting fan 8, finished product warehouses 9, electricity gather dust
Device 11, air-introduced machine 12；
Wherein screw(-type) feeder 1 is connected with venturi drier 2 and to its feed；Pushed up by two grades of pre- hot cyclone separators 4
The flue gas pipeline that portion extracts is connected to the bottom of venturi drier 2, is connected by pipeline by the top of venturi drier 2
To the top of the pre- hot cyclone separator of one-level 3；A pipeline is branched out separately on the lower discharge port pipeline of the pre- hot cyclone separator of one-level 3
Into fluidizing cooler 5, the lower discharge port pipeline connection of fluidizing cooler 5 is into finished product warehouse 9 for connection；One-level preheating rotation
Wind separator 3 is connected to the entrance point of cottrell 11 by top duct, and 11 port of export pipeline of cottrell is connected to and draws
The entrance point of blower fan 12.
A kind of drying system of above-mentioned aluminium hydroxide, is further characterized in that, the cone of the pre- hot cyclone separator of described one-level 3
Portion's discharging end goes out arm discharging in pipeline upper shed bifurcated, and 12 port of export pipeline of air-introduced machine is connected to chimney 13.
The drying system of above-mentioned a kind of aluminium hydroxide, it is characterised in that also including circulating cooling water pump 6, described fluidised form
It is a kind of heat exchanger to change cooler 5, and circulating cooling water pump 6 supplies recirculated cooling water for which.
A kind of drying system of above-mentioned aluminium hydroxide, is further characterized in that, gather dust on described fluidizing cooler 5 mouth
Pipeline and finished product warehouse 9 on the gather dust pipeline of mouth be collectively incorporated into the middle part for being connected to bagroom 7, bagroom 7
Lower discharge port pipeline be connected to the enterprising material mouth of finished product warehouse 9, the top discharge mouth connection dust collecting fan 8 of bagroom 7.
The drying system of above-mentioned a kind of aluminium hydroxide, it is characterised in that also including packer 10, described finished product warehouse 9
Lower discharge port be connected with packer 10.
The thermal source of the system from gaseous pollutant control system, by pipeline from pre- 3 bottom of hot cyclone separator of one-level
Be connected on pre- 14 top riser of hot cyclone separator of three-level, at the top of the pre- hot cyclone separator of three-level 14, two grades are connected to pipeline
4 upper lateral part of pre- hot cyclone separator, two grades of pre- hot cyclone separators 4 are connected to gaseous pollutant control master by bottom by pipeline
The tangential direction in 15 tapering of stove；Main 15 top of stove of gaseous pollutant control is connected to the pre- hot cyclone separator of three-level 14 by pipeline
Top, pre- 14 bottom of hot cyclone separator of three-level by pipeline enter gaseous pollutant control level Four current-carrying cooling system (not
Illustrate), then by pipeline to another fluid bed cooling system (not shown), from the fluidization cooling system oxidation out
Aluminum is transported to the big storehouse of aluminium oxide using pneumatic trough.
A kind of method for drying aluminium hydroxide using above-mentioned drying system, comprises the following steps：
By wet hydrogen alumina material by screw(-type) feeder 1 to 2 feed of venturi drier；By two grades of preheating cyclonic separations
The flue gas of extract about 300-400 DEG C of device 4 is by, in venturi drier 2, flue gas mixes biography with wet hydrogen alumina material
Heat, makes wet hydrogen alumina material be brought rapidly up to 120-180 DEG C, removes the attached water in wet hydrogen alumina material, by venturi
Exsiccator 2 carries out gas solid separation in being transported to the pre- hot cyclone separator of one-level 3；
In the pre- hot cyclone separator 3 of the one-level, the power of gas flowing is allowed under negative pressure state from air-introduced machine 12
Work, the flue gas of the pre- hot cyclone separator of one-level 3 is by, in cottrell 11, Jing air-introduced machines 12 are discharged by chimney 13；
The aluminium hydroxide of drying enters fluidization from the lower discharge port branch discharge nozzle connection of the pre- hot cyclone separator of one-level 3
Cooler 5, enters finished product warehouse 9 after heat exchange cooling.
A kind of furnace drying method of above-mentioned aluminium hydroxide, is further characterized in that, aluminium hydroxide through fluidizing cooler 5, by
The cooling water heat that circulating cooling water pump 6 is provided is exchanged and is cooled to≤80 DEG C.
A kind of furnace drying method of above-mentioned aluminium hydroxide, is further characterized in that, the gas in described fluidizing cooler 5 with
Gas in finished product warehouse 9 passes through 7 dedusting of bagroom together；The solid for precipitating in bagroom 7 with from
The cooling material of fluidizing cooler 5 enters finished product warehouse 9 in the lump, then packaged machine is packaged into aluminum hydroxide product.
A solid aluminum hydroxide part of the thermal source of the method after gaseous pollutant control, separation passes through pipeline from one
The pre- hot cyclone separator 3 of level to pre- 14 top riser of hot cyclone separator of three-level, and from the pre- hot cyclone separator of three-level 14
1050-1150 DEG C of hot gas mixing, in standpipe, material is preheated simultaneously and is decomposed, and aluminium hydroxide material is pre- into two grades
After gas solid separation is carried out in hot cyclone separator 4, material is entered in the main stove of gaseous pollutant control 15, in the work at burning station 16
With under, the remaining water of crystallization of high temperature removal completes crystal conversion.Aluminium oxide after roasting enters three-level under the drive of thermal current
Pre- hot cyclone separator 14 carries out solid and gas separation, and alumina material enters the cooling of gaseous pollutant control from bottom by pipeline
System.
The invention is the construction for making full use of gaseous pollutant control, borrows main flow discharged gas fume and wet hydrogen aluminium oxide is entered
Row drying, does not additionally increase heat consumption and discharged gas fume, saves the feed needed for tradition drying flow process, dispersion, stop, dedusting etc. and sets
Apply, about 5,500,000 yuan of investment reduction cost, observable index tradition stoving process reduce 0.3-0.4GJ/t, year energy efficient 1100-
1200t marks coal.
Description of the drawings
Accompanying drawing 1 is a kind of drying system schematic diagram of aluminium hydroxide.
Wherein, 1 it is screw(-type) feeder in figure, 2 be venturi drier, the pre- hot cyclone separator of 3 one-levels, 4 is two grades pre-
Hot cyclone separator, 5 be fluidizing cooler, 6 be circulating cooling water pump, 7 be bagroom, 8 be dust collecting fan, 9 be into
Product warehouse, 10 be packer, 11 be cottrell, 12 be air-introduced machine, 13 be chimney, 14 be the pre- hot cyclone separator of three-level, 15
It is burning station for the main stove of gaseous pollutant control, 16.
Specific embodiment
Embodiment 1
A kind of drying system of aluminium hydroxide, including screw(-type) feeder 1, venturi drier 2, one-level preheating cyclonic separation
Device 3, two grades of pre- hot cyclone separators 4, fluidizing cooler 5, bagroom 7, dust collecting fan 8, finished product warehouses 9, electricity gather dust
Device 11, air-introduced machine 12；
Wherein screw(-type) feeder 1 is connected with venturi drier 2 and to its feed；Pushed up by two grades of pre- hot cyclone separators 4
The flue gas pipeline that portion extracts is connected to the bottom of venturi drier 2, is connected by pipeline by the top of venturi drier 2
To the top of the pre- hot cyclone separator of one-level 3；A pipeline is branched out separately on the lower discharge port pipeline of the pre- hot cyclone separator of one-level 3
Into fluidizing cooler 5, the lower discharge port pipeline connection of fluidizing cooler 5 is into finished product warehouse 9 for connection；One-level preheating rotation
Wind separator 3 is connected to the entrance point of cottrell 11 by top duct, and 11 port of export pipeline of cottrell is connected to and draws
The entrance point of blower fan 12；The tapering discharging end of the pre- hot cyclone separator of described one-level 3 goes out arm in pipeline upper shed bifurcated and goes out
Material, 12 port of export pipeline of air-introduced machine are connected to chimney 13；Also include circulating cooling water pump 6, described fluidizing cooler 5 is
A kind of heat exchanger, circulating cooling water pump 6 supply recirculated cooling water for which；Gather dust on described fluidizing cooler 5 pipe of mouth
The pipeline of mouth of gathering dust on road and finished product warehouse 9 is collectively incorporated into the middle part for being connected to bagroom 7, under bagroom 7
Discharge opening pipeline is connected to the enterprising material mouth of finished product warehouse 9, the top discharge mouth connection dust collecting fan 8 of bagroom 7；Also include
Packer 10, the lower discharge port of described finished product warehouse 9 are connected with packer 10.
The thermal source of the system from gaseous pollutant control system, by pipeline from pre- 3 bottom of hot cyclone separator of one-level
Be connected on pre- 14 top riser of hot cyclone separator of three-level, at the top of the pre- hot cyclone separator of three-level 14, two grades are connected to pipeline
4 upper lateral part of pre- hot cyclone separator, two grades of pre- hot cyclone separators 4 are connected to gaseous pollutant control master by bottom by pipeline
The tangential direction in 15 tapering of stove；Main 15 top of stove of gaseous pollutant control is connected to the pre- hot cyclone separator of three-level 14 by pipeline
Top, pre- 14 bottom of hot cyclone separator of three-level by pipeline enter gaseous pollutant control level Four current-carrying cooling system (not
Illustrate), then by pipeline to another fluid bed cooling system (not shown), from the fluidization cooling system oxidation out
Aluminum is transported to the big storehouse of aluminium oxide using pneumatic trough.
Embodiment 2
A kind of method for drying aluminium hydroxide using drying system of the present invention, comprises the following steps：
By wet hydrogen alumina material by screw(-type) feeder 1 to 2 feed of venturi drier；By two grades of preheating cyclonic separations
The flue gas of extract about 300-400 DEG C of device 4 is by, in venturi drier 2, flue gas mixes biography with wet hydrogen alumina material
Heat, makes wet hydrogen alumina material be brought rapidly up to 120-180 DEG C, removes the attached water in wet hydrogen alumina material, by venturi
Exsiccator 2 carries out gas solid separation in being transported to the pre- hot cyclone separator of one-level 3；
In the pre- hot cyclone separator 3 of the one-level, the power of gas flowing is allowed under negative pressure state from air-introduced machine 12
Work, the flue gas of the pre- hot cyclone separator of one-level 3 is by, in cottrell 11, Jing air-introduced machines 12 are discharged by chimney 13；
The aluminium hydroxide of drying enters fluidization from the lower discharge port branch discharge nozzle connection of the pre- hot cyclone separator of one-level 3
Cooler 5, enters finished product warehouse 9 after heat exchange cooling；
Aluminium hydroxide is exchanged by the cooling water heat that circulating cooling water pump 6 is provided and is cooled to≤80 through fluidizing cooler 5
℃；
Gas in described fluidizing cooler 5 is removed by bagroom 7 together with the gas in finished product warehouse 9
Dirt；The solid for precipitating in bagroom 7 enters finished product warehouse in the lump with the cooling material from fluidizing cooler 5
9, then packaged machine is packaged into aluminum hydroxide product.
A solid aluminum hydroxide part of the thermal source of the method after gaseous pollutant control, separation passes through pipeline from one
The pre- hot cyclone separator 3 of level to pre- 14 top riser of hot cyclone separator of three-level, and from the pre- hot cyclone separator of three-level 14
1050-1150 DEG C of hot gas mixing, in standpipe, material is preheated simultaneously and is decomposed, and aluminium hydroxide material is pre- into two grades
After gas solid separation is carried out in hot cyclone separator 4, material is entered in the main stove of gaseous pollutant control 15, in the work at burning station 16
With under, the remaining water of crystallization of high temperature removal completes crystal conversion.Aluminium oxide after roasting enters three-level under the drive of thermal current
Pre- hot cyclone separator 14 carries out solid and gas separation, and alumina material enters the cooling of gaseous pollutant control from bottom by pipeline
System.
The invention makes full use of the special tectonic of gaseous pollutant control, borrows main flow discharged gas fume to wet hydrogen aluminium oxide
Dried, additionally do not increase heat consumption and discharged gas fume, save traditional feed dried needed for flow process, dispersion, stop, dedusting etc.
Facility, about 5,500,000 yuan of investment reduction cost, observable index tradition stoving process reduce 0.3-0.4GJ/t, year energy efficient 1100-
1200t marks coal.
Claims (8)
1. a kind of drying system of aluminium hydroxide, divides including screw(-type) feeder (1), venturi drier (2), one-level preheating whirlwind
From device (3), two grades pre- hot cyclone separator (4), fluidizing cooler (5), bagroom (7), dust collecting fan (8), finished product
Warehouse (9), cottrell (11), air-introduced machine (12)；
Wherein screw(-type) feeder (1) is connected with venturi drier (2) and to its feed；By two grades pre- hot cyclone separator (4)
The flue gas pipeline that Base top contact comes is connected to the bottom of venturi drier (2), by the top of venturi drier (2) by pipe
Road is connected to the top of the pre- hot cyclone separator of one-level (3)；Separately divide on the lower discharge port pipeline of the pre- hot cyclone separator of one-level (3)
Pipeline connection is paid into fluidizing cooler (5), the lower discharge port pipeline connection of fluidizing cooler (5) is stored up into finished product
Storehouse (9)；The pre- hot cyclone separator of one-level (3) is connected to the entrance point of cottrell (11), cottrell by top duct
(11) port of export pipeline is connected to the entrance point of air-introduced machine (12).
2. a kind of drying system of aluminium hydroxide according to claim 1, it is characterised in that described one-level preheating whirlwind
The tapering discharging end of separator (3) goes out arm discharging in pipeline upper shed bifurcated, and air-introduced machine (12) port of export is connected to pipeline
Chimney (13).
3. the drying system of a kind of aluminium hydroxide according to claim 1 and 2, it is characterised in that also including circulating cooling
Water pump (6), described fluidizing cooler (5) is a kind of heat exchanger, and circulating cooling water pump (6) supplies recirculated cooling water for which.
4. a kind of drying system of aluminium hydroxide according to claim 3, it is characterised in that described fluidizing cooler
(5) gather dust on mouth pipeline and finished product warehouse (9) on the gather dust pipeline of mouth be collectively incorporated into and be connected to bagroom (7)
Middle part, the lower discharge port pipeline of bagroom (7) are connected to the enterprising material mouth of finished product warehouse (9), bagroom (7) it is upper
Discharging opening connection dust collecting fan (8).
5. the drying system of a kind of aluminium hydroxide according to claim 4, it is characterised in that also including packer (10),
The lower discharge port of described finished product warehouse (9) is connected with packer (10).
6. a kind of usage right requires the method that the system of one of 1-5 dries aluminium hydroxide, comprises the following steps：
By wet hydrogen alumina material by screw(-type) feeder (1) to venturi drier (2) feed；By two grades of preheating cyclonic separations
The flue gas of extract about 300-400 DEG C of device (4) is by, in venturi drier (2), flue gas is mixed with wet hydrogen alumina material
Heat transfer is closed, wet hydrogen alumina material is brought rapidly up to 120-180 DEG C, remove the attached water in wet hydrogen alumina material, by text
In mound, exsiccator (2) carries out gas solid separation in being transported to the pre- hot cyclone separator of one-level (3)；
The power of the interior gas flowing of the pre- hot cyclone separator of one-level (3) is allowed under negative pressure state from air-introduced machine (12)
Work, the flue gas of the pre- hot cyclone separator of one-level (3) is by, in cottrell (11), Jing air-introduced machines (12) are arranged by chimney (13)
Go out；
The aluminium hydroxide of drying is cold into fluidization from the lower discharge port branch discharge nozzle connection of the pre- hot cyclone separator of one-level (3)
But device (5), enter finished product warehouse (9) after heat exchange cooling.
7. the furnace drying method of a kind of aluminium hydroxide according to claim 6, it is characterised in that aluminium hydroxide is through fluidization
Cooler (5), is exchanged by the cooling water heat that circulating cooling water pump (6) is provided and is cooled to≤80 DEG C.
8. a kind of furnace drying method of aluminium hydroxide according to claim 7, it is characterised in that described fluidizing cooler
(5) gas in passes through bagroom (7) dedusting together with the gas in finished product warehouse (9)；It is heavy in bagroom (7)
The solid for forming sediment enters finished product warehouse (9), then packaged machine packaging in the lump with the cooling material from fluidizing cooler (5)
Into aluminum hydroxide product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142456.7A CN106524730A (en) | 2016-12-13 | 2016-12-13 | Aluminium hydroxide drying system and drying method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142456.7A CN106524730A (en) | 2016-12-13 | 2016-12-13 | Aluminium hydroxide drying system and drying method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN106524730A true CN106524730A (en) | 2017-03-22 |
Family
ID=58342055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201611142456.7A Pending CN106524730A (en) | 2016-12-13 | 2016-12-13 | Aluminium hydroxide drying system and drying method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909874A (en) * | 2022-05-07 | 2022-08-16 | 天华化工机械及自动化研究设计院有限公司 | Method for drying dihydrate ferric phosphate by multistage Venturi circulation superheated steam |
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| CA1082125A (en) * | 1975-02-25 | 1980-07-22 | Kaloo R.K. Bhilotra | Production of aluminium |
| CN101037211A (en) * | 2007-02-15 | 2007-09-19 | 沈阳铝镁设计研究院 | Dried fluorine aluminum powder cooling and conveying process |
| CN102410706A (en) * | 2011-11-03 | 2012-04-11 | 云南新立有色金属有限公司 | Fluidized bed drying method of ilmenite powder |
| CN103193400A (en) * | 2013-04-16 | 2013-07-10 | 中材装备集团有限公司 | Temperature-controlled suspension roaster |
| CN206387231U (en) * | 2016-12-13 | 2017-08-08 | 中铝集团山西交口兴华科技股份有限公司 | A kind of drying system of aluminium hydroxide |
-
2016
- 2016-12-13 CN CN201611142456.7A patent/CN106524730A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1082125A (en) * | 1975-02-25 | 1980-07-22 | Kaloo R.K. Bhilotra | Production of aluminium |
| CN101037211A (en) * | 2007-02-15 | 2007-09-19 | 沈阳铝镁设计研究院 | Dried fluorine aluminum powder cooling and conveying process |
| CN102410706A (en) * | 2011-11-03 | 2012-04-11 | 云南新立有色金属有限公司 | Fluidized bed drying method of ilmenite powder |
| CN103193400A (en) * | 2013-04-16 | 2013-07-10 | 中材装备集团有限公司 | Temperature-controlled suspension roaster |
| CN206387231U (en) * | 2016-12-13 | 2017-08-08 | 中铝集团山西交口兴华科技股份有限公司 | A kind of drying system of aluminium hydroxide |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114909874A (en) * | 2022-05-07 | 2022-08-16 | 天华化工机械及自动化研究设计院有限公司 | Method for drying dihydrate ferric phosphate by multistage Venturi circulation superheated steam |
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