CN101485948B - Method for treating fluidizing reactor flue gas in production of aluminum oxide - Google Patents
Method for treating fluidizing reactor flue gas in production of aluminum oxide Download PDFInfo
- Publication number
- CN101485948B CN101485948B CN2008100686171A CN200810068617A CN101485948B CN 101485948 B CN101485948 B CN 101485948B CN 2008100686171 A CN2008100686171 A CN 2008100686171A CN 200810068617 A CN200810068617 A CN 200810068617A CN 101485948 B CN101485948 B CN 101485948B
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- CN
- China
- Prior art keywords
- flue gas
- treating
- alumina producing
- fluidizing reactor
- alumina
- Prior art date
- 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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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000003546 flue gas Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000428 dust Substances 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000011084 recovery Methods 0.000 claims abstract description 4
- 238000005406 washing Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 229910001710 laterite Inorganic materials 0.000 claims description 7
- 239000011504 laterite Substances 0.000 claims description 7
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 3
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical group O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- 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
Abstract
The invention discloses a method for processing flue gas in a fluidizaing reactor in the alumina production. The method comprises the following steps: the flue gas in an electric dust collector of the fluidizaing reactor is introduced to indirect countercurrent flow equipment (3) from an outlet of the electric dust collector (1) through a pipeline (2) to indirectly exchange heat with a low temperature medium, so that the temperature of the low temperature medium is increased; the flue gas after heat exchange enters a whirlwind dehydrator (5) through the pipeline (4) to be hydrated, wherein the dust (mainly alumina powder) in the flue gas is adhered to condensing water and the dehydrated flue gas is discharged to atmosphere; and the received condensing water is returned to the alumina production. Compared with the prior art, the method has the advantages that the surplus heat utilization of the flue gas in the fluidizaing reactor is realized, the use level of steam for heating in the alumina production is reduced, the energy resources are saved, the coefficient of recovery of alumina is improved, the production cost is reduced, and the like.
Description
Technical field:
The invention belongs to technical field of alumina production, the processing method of fluidizing reactor flue gas in particularly a kind of alumina producing.
Background technology:
Present in the production process of aluminium oxide, a large amount of flue gases that the aluminium hydroxide fluidizing reactor is produced and water vapour (1 about 150000Nm of fluidizing reactor discharged flue gas
3/ h, about 150～160 ℃ of flue-gas temperature, vapour content is 40～45% in the flue gas, CO
2Content is about 9～10%, O
2Content is about 10%) generally all be directly to be discharged into atmosphere through electric dust collection device after gathering dust, thus make waste heat in the flue gas and water vapour and partial oxidation aluminium powder dirt can not obtain recycling, cause the waste of the energy and resource.
Summary of the invention:
The technical problem that will solve of the present invention is:
Method for treating fluidizing reactor flue gas in a kind of alumina producing is provided, reclaims waste heat and water vapour and partial oxidation aluminium powder dirt in the flue gas, to solve flue gas in the prior art directly energy that causes of discharging and the waste of resource.
The present invention takes following technical scheme:
The flue gas that the fluidizing reactor electricity gathers dust is incorporated into indirect type countercurrent flow equipment (3) and cryogenic media through piping (2) and carries out indirect heat exchange from electricity (1) outlet of gathering dust, flue gas after the heat exchange enters tornado evaporator (5) through piping (4) and dewaters, dust in flue gas (being mainly alumina powder) is attached on the condensed water, fume emission atmosphere after the dehydration, the condensed water of accepting returns in the alumina producing.
Flue gas after the dehydration is introduced chimney (6) discharging atmosphere through air-introduced machine (7).
The cryogenic media that carries out heat exchange with flue gas can be the seed precipitation solution in the decomposition process, but be not limited to this a kind of material, can also carry out heat exchange for the cryogenic media that the washings of the raw slurry in the sintering process and laterite washing water, finished product aluminium hydroxide etc. need heat, make the temperature of this cryogenic media improve 20～30 ℃.
The condensed water and the aluminum oxide dust that reclaim turn back in the alumina producing laterite washing system.The condensed water that reclaims can be used as the hot wash red mud, and aluminum oxide dust also can return in the alumina producing laterite washing system and be reclaimed.
The present invention compared with prior art has following advantage:
1, realizes the UTILIZATION OF VESIDUAL HEAT IN of fluidizing reactor flue gas, reduce the steam consumption that is used to heat in the alumina producing, saved the energy, reduced production cost.
2, the water vapour in the aluminium oxide fluidizing reactor flue gas is reclaimed, and with this condensed water as alumina producing laterite washing water, reduced the adding of new water, reduced production cost.
3, the aluminum oxide dust in the condensed water also can return in the alumina producing system and be reclaimed, and has improved the rate of recovery of aluminium oxide.
Description of drawings:
Accompanying drawing 1 is a general flow chart of the present invention.
The specific embodiment
Embodiments of the invention:
After aluminium hydroxide fluidizing reactor electricity gathers dust, flue gas more than 150 ℃ is incorporated into indirect type counter-flow heat exchange equipment 3 through piping 2 and carries out indirect heat exchange with seed precipitation solution from electricity 1 outlet of gathering dust, to reduce the steam consumption in the aluminum oxide production process.Flue gas after the heat exchange enters tornado evaporator 5 through piping 4 and carries out the whirlwind dehydration, dust in flue gas (being mainly alumina powder) is attached on the condensation globule, clean low-temperature flue gas after the dehydration (main component is carbon dioxide and nitrogen) is introduced chimneys 6 discharging atmosphere through air-introduced machine 7, and condensed water of taking off and aluminum oxide dust enter hot water collecting pit 9 reusable heat water pumps 8 and deliver in the alumina producing laterite washing system washing red mud and reclaimed.
Claims (7)
1. method for treating fluidizing reactor flue gas in the alumina producing, it is characterized in that: the flue gas that the fluidizing reactor electricity gathers dust is incorporated into the indirect type countercurrent flow equipment (3) through piping and carries out indirect heat exchange with cryogenic media from electricity (1) outlet of gathering dust, flue gas after the heat exchange enters tornado evaporator (5) through piping and dewaters, dust in flue gas is attached on the condensed water, fume emission atmosphere after the dehydration, the condensed water of accepting returns in the alumina producing.
2. method for treating fluidizing reactor flue gas in the alumina producing according to claim 1 is characterized in that: cryogenic media is carried in the pipeline of indirect type countercurrent flow equipment (3), and the flue gas that electricity gathers dust is carried outside pipeline.
3. method for treating fluidizing reactor flue gas in the alumina producing according to claim 1 is characterized in that: electricity gathers dust (1) exit gas temperature more than 150 ℃.
4. method for treating fluidizing reactor flue gas in the alumina producing according to claim 1 is characterized in that: the flue gas after the dehydration is introduced chimney (6) discharging atmosphere through air-introduced machine (7).
5. method for treating fluidizing reactor flue gas in the alumina producing according to claim 1 is characterized in that: described cryogenic media is a seed precipitation solution.
6. method for treating fluidizing reactor flue gas in the alumina producing according to claim 1 is characterized in that: the condensed water of recovery turns back in the alumina producing laterite washing system and washs red mud.
7. method for treating fluidizing reactor flue gas in the alumina producing according to claim 1 is characterized in that: the dust in flue gas of recovery turns back in the alumina producing laterite washing system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100686171A CN101485948B (en) | 2008-01-17 | 2008-01-17 | Method for treating fluidizing reactor flue gas in production of aluminum oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100686171A CN101485948B (en) | 2008-01-17 | 2008-01-17 | Method for treating fluidizing reactor flue gas in production of aluminum oxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101485948A CN101485948A (en) | 2009-07-22 |
| CN101485948B true CN101485948B (en) | 2010-11-10 |
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|---|---|---|---|
| CN2008100686171A Active CN101485948B (en) | 2008-01-17 | 2008-01-17 | Method for treating fluidizing reactor flue gas in production of aluminum oxide |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886882A (en) * | 2010-06-13 | 2010-11-17 | 中国铝业股份有限公司 | Smoke processing method for alumina roasting furnace |
| CN102313454A (en) * | 2010-06-29 | 2012-01-11 | 沈阳铝镁设计研究院有限公司 | Waste heat recovery device of calcinator |
| CN102311135A (en) * | 2010-06-29 | 2012-01-11 | 沈阳铝镁设计研究院有限公司 | Method for ash returning utilizing electrical dust collection |
| CN101900492B (en) * | 2010-08-30 | 2012-05-30 | 中国铝业股份有限公司 | Anti-scabing method of aluminum oxide roasting furnace flue gas waste heat recovery process |
| CN105000582B (en) * | 2015-08-28 | 2016-08-24 | 沈阳鑫博工业技术股份有限公司 | A kind of system and method for roasting aluminium hydroxide recycle-water steam |
| CN106492545A (en) * | 2017-01-11 | 2017-03-15 | 沈阳鑫博工业技术股份有限公司 | Aluminium hydroxide and complementary energy recovery device and method in a kind of Aluminium hydroxide roasting flue gas |
| CN108926981A (en) * | 2017-05-24 | 2018-12-04 | 沈阳铝镁设计研究院有限公司 | The desulfurization of aluminium hydroxide production process flue gas and afterheat utilizing system and method |
| CN115143790A (en) * | 2022-06-22 | 2022-10-04 | 中冶赛迪工程技术股份有限公司 | Method and system for unfreezing materials by waste gas of blast furnace hot blast stove |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2111307U (en) * | 1991-10-05 | 1992-07-29 | 韦廖君 | Atmospheric recovering device for papermaking boil down waste heat |
| US5141734A (en) * | 1983-11-07 | 1992-08-25 | Aluminum Company Of America | Steam producing process |
| CN1317361A (en) * | 2001-03-30 | 2001-10-17 | 贵阳铝镁设计研究院 | Process for purifying fume from calcining furnace of aluminium electrolyzing anode |
| CN200966978Y (en) * | 2006-08-01 | 2007-10-31 | 顾建 | Exhaust gas treatment device of setting machine |
| CN101067538A (en) * | 2007-06-05 | 2007-11-07 | 沈阳铝镁设计研究院 | Steam condensed water waste heat utilizing method and equipment |
-
2008
- 2008-01-17 CN CN2008100686171A patent/CN101485948B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5141734A (en) * | 1983-11-07 | 1992-08-25 | Aluminum Company Of America | Steam producing process |
| CN2111307U (en) * | 1991-10-05 | 1992-07-29 | 韦廖君 | Atmospheric recovering device for papermaking boil down waste heat |
| CN1317361A (en) * | 2001-03-30 | 2001-10-17 | 贵阳铝镁设计研究院 | Process for purifying fume from calcining furnace of aluminium electrolyzing anode |
| CN200966978Y (en) * | 2006-08-01 | 2007-10-31 | 顾建 | Exhaust gas treatment device of setting machine |
| CN101067538A (en) * | 2007-06-05 | 2007-11-07 | 沈阳铝镁设计研究院 | Steam condensed water waste heat utilizing method and equipment |
Non-Patent Citations (1)
| Title |
|---|
| 张洁.喷射式换热器的设计与研究.《中南大学硕士学位论文》.2007,第9页. * |
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| CN101485948A (en) | 2009-07-22 |
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