CN109081366A - A kind of gaseous pollutant control low-temperature bake method - Google Patents
A kind of gaseous pollutant control low-temperature bake method Download PDFInfo
- Publication number
- CN109081366A CN109081366A CN201710441257.4A CN201710441257A CN109081366A CN 109081366 A CN109081366 A CN 109081366A CN 201710441257 A CN201710441257 A CN 201710441257A CN 109081366 A CN109081366 A CN 109081366A
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- roaster
- cooling
- aluminium oxide
- stay groove
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/30—Preparation of aluminium oxide or hydroxide by thermal decomposition or by hydrolysis or oxidation of aluminium compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Inorganic Chemistry (AREA)
Abstract
The present invention relates to a kind of gaseous pollutant control low-temperature bake method and processes, charging wet hydrogen aluminium oxide is dried in venturi drier, after material after drying carries out gas solid separation in one cyclonic preheater, it is preheated in second level cyclone preheater and sloughs partially crystallizable water and be sent to roaster；The finished product aluminium oxide that roaster comes out is sent into lower one-step cooling after cooling cyclone is cooling；After the high-temp waste gas that roaster comes out is by aluminium hydroxide heat absorption cooling, it is sent to dust pelletizing system；The finished product aluminium oxide that roaster comes out is fired cyclone separator and enters in stay groove, while stop in stay groove, enters stay groove by the fluidized wind that air blower pressurization generates, makes product formation fluidized state；Product aluminium oxide enters cooling system by stay groove overflow.By the way that stay groove is arranged, extends calcining time, reduce maturing temperature, reduce firing rate, reduce production run cost.
Description
Technical field
The present invention relates to gaseous pollutant controls in a kind of low-temperature bake method more particularly to a kind of aluminum oxide production process
Low-temperature bake method and process, belongs to technical field of alumina production.
Background technique
The maturing temperature of the widely used gaseous pollutant control of country's calcinations of aluminum hydroxide is 1050 DEG C ~ 1200 at present
DEG C, maturing temperature height causes roasting system radiation loss, exhausted air quantity and fuel consumption higher, reduces the heat of roasting system
Utilization rate causes production run at high cost.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of gaseous pollutant control low-temperature bake method, purposes
It is to reduce maturing temperature, reduces heat consumption, firing rate is reduced, to reduce the operating cost of roasting system.
For the above-mentioned purpose the present invention is implemented as follows: a kind of gaseous pollutant control low-temperature bake method, feeds wet
Aluminium hydroxide is dried in venturi drier, after the material after drying carries out gas solid separation in one cyclonic preheater,
It is preheated in second level cyclone preheater and sloughs partially crystallizable water and be sent to roaster；The finished product aluminium oxide that roaster comes out is through revolving
Lower one-step cooling is sent into after air cooler is cooling；Institute's calorific requirement is provided by liquid or gaseous fuel in roasting process, cold through whirlwind
But the air for the heat preheating that finished product aluminium oxide releases in device is for burning；The high-temp waste gas that roaster comes out is by aluminium hydroxide
After heat absorption is cooling, it is sent to dust pelletizing system；The finished product aluminium oxide that roaster comes out enters in stay groove in roasting cyclone separator,
While stop in stay groove, stay groove is entered by the fluidized wind that air blower pressurization generates, makes product formation fluidized state；Product
Aluminium oxide enters cooling system by stay groove overflow.
The maturing temperature of roaster is at 900 DEG C ~ 1000 DEG C.
The bottom of roasting cyclone separator is arranged in stay groove.
Fluidized bed is set in stay groove.
The fluidized wind of fluidized bed is derived from exhaust gas, roasting air or the roasting system hot wind being discharged from one cyclonic preheater,
Fluidized wind is sent to fluidized bed by air blower.
The finished product aluminium oxide that roaster comes out is stopping 1 ~ 20 minute in stay groove, and aluminium oxide is in stay groove with overflow
Mode enters cooling cyclone.
Advantages of the present invention and effect are as follows: by the way that stay groove is arranged, extending calcining time, reduce maturing temperature, reduce
Firing rate reduces production run cost.Maturing temperature reduces, and the radiation loss of roasting system reduces, and improves the thermal efficiency.Roasting
Temperature reduces, and operating condition air quantity is reduced, and the exhaust blower of gaseous pollutant control system is leading control production capacity means, thus whole
The production capacity of a roaster system can improve.The reduction of firing rate makes in the operational process of roasting system through each cyclone cylinder and roasting
The operating condition air quantity for burning furnace is reduced, and the diameter of each cyclone cylinder reduces, and is reduced by the air quantity of exhaust blower, can be saved construction and operation
Cost.Maturing temperature reduces, and can extend the service life of inner lining material, improves the running rate of roaster, reduces operating cost.
Detailed description of the invention
Fig. 1 is gaseous pollutant control process flow chart of the present invention.
In figure: 1, venturi drier；2, one cyclonic preheater；3, second level cyclone preheater；4, cyclonic separation is roasted
Device；5, roaster；6, one cyclonic cooler；7, two pole cooling cyclone；8, three-level cooling cyclone；9, Category Four cyclone is cooling
Device；10, air blower；11, stay groove；A, aluminium hydroxide；B, aluminium oxide；C, fuel；D, exhaust gas；E, air.
Specific embodiment
The embodiment combination attached drawing of invention is described in detail below, but protection scope of the present invention is not by embodiment institute
Limit.
As shown in Figure 1, a kind of gaseous pollutant control low-temperature bake method of the present invention, feeds wet hydrogen aluminium oxide a in Wen Qiu
In dried in drier 1, it is dry after material carry out gas solid separation in one cyclonic preheater 2 after, it is pre- in second level whirlwind
It is preheated in hot device 3 and sloughs partially crystallizable water and be sent to roaster 5；The maturing temperature of roaster 5 is at 900 DEG C ~ 1000 DEG C.Roasting
The finished product aluminium oxide that furnace 5 comes out is sent into lower one-step cooling after cooling cyclone is cooling；Institute's calorific requirement is by liquid in roasting process
Or gaseous fuel c is provided, the air for the heat preheating that finished product aluminium oxide releases in cooling cyclone is for burning；Roaster
After 5 high-temp waste gas come out are by aluminium hydroxide heat absorption cooling, it is sent to dust pelletizing system；The finished product aluminium oxide that roaster 5 comes out is roasting
Burning cyclone separator 4, which enters in stay groove 11, to stop 1 ~ 20 minute, while stop in stay groove 11, is pressurizeed by air blower 10
The fluidized wind of generation enters stay groove 11, makes product formation fluidized state；Product aluminium oxide is entered cold by 11 overflow of stay groove
But system.
The bottom of roasting cyclone separator 4 is arranged in stay groove 11.Fluidized bed is set in stay groove 11.The fluidisation of fluidized bed
Wind is derived from exhaust gas, air or the roasting system hot wind being discharged from one cyclonic preheater, and fluidized wind is sent to fluidisation by air blower
Bed.
Claims (6)
1. a kind of gaseous pollutant control low-temperature bake method, it is characterised in that: charging wet hydrogen aluminium oxide is in venturi drier
It is interior to be dried, it is pre- in second level cyclone preheater after the material after drying carries out gas solid separation in one cyclonic preheater
Heat is simultaneously sent to roaster after removing partially crystallizable water；Under the finished product aluminium oxide that roaster comes out is sent into after cooling cyclone is cooling
One-step cooling；Institute's calorific requirement is provided by liquid or gaseous fuel in roasting process, and finished product aluminium oxide discharges in cooling cyclone
The air of heat preheating out is for burning；After the high-temp waste gas that roaster comes out is by aluminium hydroxide heat absorption cooling, it is sent to dedusting
System；The finished product aluminium oxide that roaster comes out enters in stay groove in roasting cyclone separator, while stop in stay groove,
Stay groove is entered by the fluidized wind that air blower pressurization generates, makes product formation fluidized state；Product aluminium oxide is overflow by stay groove
Stream enters cooling system.
2. a kind of gaseous pollutant control low-temperature bake method according to claim 1, it is characterised in that the roasting of roaster
Temperature is burnt at 900 DEG C ~ 1000 DEG C.
3. a kind of gaseous pollutant control low-temperature bake method according to claim 1, it is characterised in that stay groove setting
In the bottom of roasting cyclone separator.
4. a kind of gaseous pollutant control low-temperature bake method according to claim 1 or 3, it is characterised in that in stay groove
Middle setting fluidized bed.
5. a kind of gaseous pollutant control low-temperature bake method according to claim 4, it is characterised in that the stream of fluidized bed
Change wind and be derived from exhaust gas, roasting system hot wind or the air being discharged from one cyclonic preheater, fluidized wind is sent to stream by air blower
Change bed.
6. a kind of gaseous pollutant control low-temperature bake method according to claim 1, it is characterised in that roaster comes out
Finished product aluminium oxide stopped 1 ~ 20 minute in stay groove, it is cooling to enter whirlwind in a manner of overflow for aluminium oxide in stay groove
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710441257.4A CN109081366A (en) | 2017-06-13 | 2017-06-13 | A kind of gaseous pollutant control low-temperature bake method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710441257.4A CN109081366A (en) | 2017-06-13 | 2017-06-13 | A kind of gaseous pollutant control low-temperature bake method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109081366A true CN109081366A (en) | 2018-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710441257.4A Pending CN109081366A (en) | 2017-06-13 | 2017-06-13 | A kind of gaseous pollutant control low-temperature bake method |
Country Status (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827426A (en) * | 2019-03-07 | 2019-05-31 | 北京航化节能环保技术有限公司 | A kind of anticorrosive roasting system and method |
| CN110316748A (en) * | 2019-08-22 | 2019-10-11 | 中国科学院过程工程研究所 | A kind of roasting system and the method for producing Alpha-alumina |
| CN111661861A (en) * | 2019-03-08 | 2020-09-15 | 中国科学院过程工程研究所 | Method for producing high-purity anhydrous aluminum chloride from aluminum hydroxide |
| CN112174176A (en) * | 2020-09-28 | 2021-01-05 | 沈阳鑫博工业技术股份有限公司 | Device and method for preparing alpha-alumina by using aluminum hydroxide |
| CN114574712A (en) * | 2022-03-14 | 2022-06-03 | 沈阳铝镁设计研究院有限公司 | Roasting system and roasting process for reducing roasting temperature by adopting fluidized bed |
| CN114754582A (en) * | 2022-03-14 | 2022-07-15 | 沈阳铝镁设计研究院有限公司 | Novel low-temperature roasting system and roasting process for aluminum oxide roasting furnace |
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| US20050238571A1 (en) * | 2004-04-26 | 2005-10-27 | Raahauge Benny E | Process and apparatus for the production of alumina |
| CN104058435A (en) * | 2014-06-05 | 2014-09-24 | 鞠复勇 | Equipment and method for calcining alpha aluminum oxide by using aluminum oxide gaseous suspension calciner |
| CN104692435A (en) * | 2015-03-31 | 2015-06-10 | 沈阳鑫博工业技术股份有限公司 | Suspension roasting device and technology for producing multiform aluminum oxide |
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2017
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Patent Citations (3)
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| US20050238571A1 (en) * | 2004-04-26 | 2005-10-27 | Raahauge Benny E | Process and apparatus for the production of alumina |
| CN104058435A (en) * | 2014-06-05 | 2014-09-24 | 鞠复勇 | Equipment and method for calcining alpha aluminum oxide by using aluminum oxide gaseous suspension calciner |
| CN104692435A (en) * | 2015-03-31 | 2015-06-10 | 沈阳鑫博工业技术股份有限公司 | Suspension roasting device and technology for producing multiform aluminum oxide |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827426A (en) * | 2019-03-07 | 2019-05-31 | 北京航化节能环保技术有限公司 | A kind of anticorrosive roasting system and method |
| CN111661861A (en) * | 2019-03-08 | 2020-09-15 | 中国科学院过程工程研究所 | Method for producing high-purity anhydrous aluminum chloride from aluminum hydroxide |
| CN111661861B (en) * | 2019-03-08 | 2021-10-22 | 中国科学院过程工程研究所 | Method for producing high-purity anhydrous aluminum chloride from aluminum hydroxide |
| CN110316748A (en) * | 2019-08-22 | 2019-10-11 | 中国科学院过程工程研究所 | A kind of roasting system and the method for producing Alpha-alumina |
| CN112174176A (en) * | 2020-09-28 | 2021-01-05 | 沈阳鑫博工业技术股份有限公司 | Device and method for preparing alpha-alumina by using aluminum hydroxide |
| CN112174176B (en) * | 2020-09-28 | 2022-11-15 | 沈阳鑫博工业技术股份有限公司 | Device and method for preparing alpha-alumina by using aluminum hydroxide |
| CN114574712A (en) * | 2022-03-14 | 2022-06-03 | 沈阳铝镁设计研究院有限公司 | Roasting system and roasting process for reducing roasting temperature by adopting fluidized bed |
| CN114754582A (en) * | 2022-03-14 | 2022-07-15 | 沈阳铝镁设计研究院有限公司 | Novel low-temperature roasting system and roasting process for aluminum oxide roasting furnace |
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Application publication date: 20181225 |