CN109556414A - A kind of residual-heat utilization method and device of Aluminium hydroxide roasting furnace product - Google Patents
A kind of residual-heat utilization method and device of Aluminium hydroxide roasting furnace product Download PDFInfo
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- CN109556414A CN109556414A CN201710886111.0A CN201710886111A CN109556414A CN 109556414 A CN109556414 A CN 109556414A CN 201710886111 A CN201710886111 A CN 201710886111A CN 109556414 A CN109556414 A CN 109556414A
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- former
- water
- heat exchanger
- raw liquor
- heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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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
- C01F7/44—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water
- C01F7/441—Dehydration of aluminium oxide or hydroxide, i.e. all conversions of one form into another involving a loss of water by calcination
- C01F7/444—Apparatus therefor
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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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention discloses the residual-heat utilization method and device of a kind of Aluminium hydroxide roasting furnace product: the about 250 DEG C of aluminium oxide to discharge from former gaseous pollutant control fourth stage cooling cyclone enter in fluidized bed cooler, it first exchanges heat with vaporizing raw liquor (qualified lye) under fluidized state, then exchanges heat with recirculated water.Stoste (qualified lye) after heat temperature raising send evaporization process (raw ore slurry grinds process or pre-desiliconizing process).Aluminium oxide is cooled to 75 DEG C or so rear dischargings.Compared with the prior art, the invention has the following beneficial effects: doing cold source by using vaporizing raw liquor (qualified lye), instead of part recirculated water, new water is saved, reduces loss of the aluminium oxide heat in recirculated water process air cooler, it can reduce the evaporization process steam consumption, cost efficiency.
Description
Technical field
The present invention relates to a kind of afterheat utilizing system more particularly to a kind of UTILIZATION OF VESIDUAL HEAT IN systems of Aluminium hydroxide roasting furnace product
System.
Background technique
China is the first big alumina producing state in the world, 61,000,000 tons of aluminium oxide yield in 2016.Industrial production is universal
Product aluminium oxide is made using gaseous pollutant control roasting intermediate product aluminium hydroxide, when aluminium oxide discharges in roaster
Temperature is about 250 DEG C, then is cooled to about 75 DEG C of laggard aluminum oxide warehouses through fluidizing cooler.Fluidizing cooler uses fluidized wind
Recirculated cooling water is passed through in the water pipe that the aluminium oxide of high temperature is blowed floating, while being inwardly placed in one, recirculated water generally divides three
To level Four (three, four sections are passed through), every section of upper coolant-temperature gage is identical.The heat overwhelming majority of high temperature alumina is taken away by recirculated water, changes
Recirculated water after heat heating again returns to fluidizing cooler after the air-cooled cooling of cooling tower.Aluminium oxide in this course
Most of sensible heat is taken away by recirculated water, and by air-cooled, heat loses completely.
In the mother liquid evaporation process of alumina producing, vaporizing raw liquor is generally 85 DEG C or so, and suitably promoting its temperature can drop
Low steam consumption for evaporation, thus energy saving.
Process is ground in the raw ore slurry of alumina producing, qualified lye enters ore grinding together with ore, lime, is prepared into conjunction
Pre-desiliconizing is sent to cover effective initial steam or the heating of secondary vapour after lattice ore pulp.Qualified lye is generally 85 DEG C or so, suitably promotes its temperature
Degree can reduce the pre-desiliconizing steam consumption, thus energy saving.
Ore pulp need to usually supplement qualified lye after the pre-desiliconizing process of alumina producing, pre-desiliconizing, then be pumped with diaphragm
To dissolving-out cannula, the leaching temperature of design is reached after secondary vapour and initial steam heating.The qualified alkali supplemented after pre-desiliconizing ore pulp
The qualified lye that liquid and raw ore slurry grind process is homologous, is 85 DEG C or so, and the dissolution steam consumption can be reduced by suitably promoting its temperature, thus
Energy conservation.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of afterheat utilizing system of Aluminium hydroxide roasting furnace product,
Purpose is to reduce evaporation (pre-desiliconizing or dissolution) steam consumption using aluminium oxide waste-heat vaporizing raw liquor (qualified lye), is saved new
Water consumption improves Business Economic Benefit.
In order to achieve the above object, the technical solution of the present invention is as follows:
A kind of residual-heat utilization method of Aluminium hydroxide roasting furnace product, stoste discharge from former vaporizing raw liquor slot, are steamed by original
Hair stoste is pumped into fluidizing cooler, as the cold source that exchanges heat before fluidizing cooler and enters fluidizing cooler
In high temperature alumina heat exchange；The cold source that recirculated water exchanges heat as fluidizing cooler afterbody will be followed with former water circulating pump
Ring water is sent from former water cooling pond into fluidizing cooler, arrives former cooling tower cooling after heat exchange again, most laggard former water cooling pond, thus structure
At circulation；Stoste after heat exchange heating send evaporization process to evaporate.
Afterbody heat exchange cold medium is recirculated water, remaining cold medium at different levels is vaporizing raw liquor, and vaporizing raw liquor is first situated between with hot
The heat exchange of matter aluminium oxide.
Vaporizing raw liquor after heat exchange send raw ore slurry to grind process ore matching or pre-desiliconizing process is sent to enter diaphragm pump.
The present invention further discloses a kind of device for realizing the method, including former roaster fourth stage whirlwind are cooling
Device, fluidizing cooler, former vaporizing raw liquor slot, former vaporizing raw liquor pump, former cooling tower, former water cooling pond, former water circulating pump；Original roasting
The outlet of furnace fourth stage cooling cyclone and the feed inlet of fluidizing cooler connect；Former vaporizing raw liquor slot passes through former vaporizing raw liquor
Pump is connect with the primary heat exchanger import of fluidizing cooler；Former water cooling pond passes through former water circulating pump and fluidizing cooler most
The water inlet of rear stage heat exchanger connects；The water outlet of afterbody heat exchanger is connect with former cooling tower, former cooling tower and raw water
Pond connection；The outlet of primary heat exchanger is connected to by pipeline with the feed inlet of evaporization process equipment.
The primary heat exchanger is multiple groups.
The inlet and outlet of the primary heat exchanger is arranged at the upper end of primary heat exchanger shell.
The type of attachment of multiple groups primary heat exchanger is series connection.
Detailed description of the invention
Fig. 1 is present system flow chart.
In figure: 1 former roaster fourth stage cooling cyclone, 2 fluidizing coolers, 3 former vaporizing raw liquor slot (former qualification lye
Slot), 4 former vaporizing raw liquors pumps (former qualification lye pump), 5 former cooling towers, 6 former water cooling ponds, 7 former water circulating pumps.
Specific embodiment
The application is further described below in conjunction with attached drawing.
Embodiment 1
As shown in Figure 1, the inventive system comprises former roaster fourth stage cooling cyclone 1, fluidizing cooler 2, originals
Vaporizing raw liquor slot 3, former vaporizing raw liquor pump 4, former cooling tower 5, former water cooling pond 6, former water circulating pump 7；Former roaster fourth stage whirlwind
The outlet of cooler 1 is connect with the feed inlet of fluidizing cooler 2；Former vaporizing raw liquor slot 3 passes through former vaporizing raw liquor pump 4 and fluidised form
Change the primary heat exchanger import connection of cooler 2；Former water cooling pond 6 passes through last of former water circulating pump 7 and fluidizing cooler 2
The water inlet connection of grade heat exchanger；The water outlet of afterbody heat exchanger is connect with former cooling tower 5, former cooling tower 5 and former pond 6
Connection；The outlet of primary heat exchanger is connected to by pipeline with the feed inlet of evaporization process equipment.
The primary heat exchanger is multiple groups.
The inlet and outlet of the primary heat exchanger is arranged at the upper end of primary heat exchanger shell.
The type of attachment of multiple groups primary heat exchanger is series connection.
Roasted product aluminium oxide from former roaster fourth stage cooling cyclone 1 discharging enter fluidizing cooler 2, stoste from
Former vaporizing raw liquor slot 3 discharges, and is sent into fluidizing coolers 2 by former vaporizing raw liquor pump 4, as the cold source that exchanges heat before it with
Enter the high temperature alumina heat exchange in fluidizing cooler 2.Recirculated water exchanges heat cold as 2 afterbody of fluidizing cooler
Source is given it into fluidizing cooler 2 from former water cooling pond 6 with former water circulating pump 7, is arrived former cooling tower 5 after heat exchange again and is cooled down, most
Laggard original water cooling pond 6, to constitute circulation.Stoste after heat exchange heating send evaporization process to evaporate.
The about 250 DEG C of aluminium oxide to discharge from former gaseous pollutant control fourth stage cooling cyclone cool down and follow by lye
After ring water is cooled to 75 DEG C or so, the discharging of finished product aluminium oxide.
Although the embodiment of the present application is described above in conjunction with attached drawing, the application does not limit to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, is not restrictive, those skilled in the art
Under the enlightenment of the application, when not departing from the application objective and scope of the claimed protection, it can also make very
Multi-form, these are belonged within the protection scope of the application.
Claims (7)
1. a kind of residual-heat utilization method of Aluminium hydroxide roasting furnace product, it is characterised in that: stoste discharges from former vaporizing raw liquor slot,
It is pumped into fluidizing cooler by former vaporizing raw liquor, as the cold source that exchanges heat before fluidizing cooler and enters fluidised form
Change the high temperature alumina heat exchange in cooler；The cold source that recirculated water exchanges heat as fluidizing cooler afterbody is recycled with original
Water pump send recirculated water into fluidizing cooler from former water cooling pond, arrives former cooling tower cooling after heat exchange again, most laggard former cold water
Pond, to constitute circulation；Stoste after heat exchange heating send evaporization process to evaporate.
2. the residual-heat utilization method of Aluminium hydroxide roasting furnace product according to claim 1, it is characterised in that: afterbody
Heat exchange cold medium is recirculated water, remaining cold medium at different levels is vaporizing raw liquor, and vaporizing raw liquor first exchanges heat with thermal medium aluminium oxide.
3. the residual-heat utilization method of Aluminium hydroxide roasting furnace product according to claim 1, it is characterised in that: after heat exchange
Vaporizing raw liquor send raw ore slurry to grind process ore matching or pre-desiliconizing process is sent to enter diaphragm pump.
4. a kind of device for realizing claim 1 the method, it is characterised in that: cooling including former roaster fourth stage whirlwind
Device, fluidizing cooler, former vaporizing raw liquor slot, former vaporizing raw liquor pump, former cooling tower, former water cooling pond, former water circulating pump；Original roasting
The outlet of furnace fourth stage cooling cyclone and the feed inlet of fluidizing cooler connect；Former vaporizing raw liquor slot passes through former vaporizing raw liquor
Pump is connect with the primary heat exchanger import of fluidizing cooler；Former water cooling pond passes through former water circulating pump and fluidizing cooler most
The water inlet of rear stage heat exchanger connects；The water outlet of afterbody heat exchanger is connect with former cooling tower, former cooling tower and raw water
Pond connection；The outlet of primary heat exchanger is connected to by pipeline with the feed inlet of evaporization process equipment.
5. device according to claim 4, it is characterised in that: the primary heat exchanger is multiple groups.
6. device according to claim 4, it is characterised in that: the inlet and outlet of the primary heat exchanger is arranged at just
The upper end of grade heat exchanger shell.
7. device according to claim 5, it is characterised in that: the type of attachment of multiple groups primary heat exchanger is series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710886111.0A CN109556414B (en) | 2017-09-27 | 2017-09-27 | Method and device for utilizing waste heat of aluminum hydroxide roasting furnace product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710886111.0A CN109556414B (en) | 2017-09-27 | 2017-09-27 | Method and device for utilizing waste heat of aluminum hydroxide roasting furnace product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109556414A true CN109556414A (en) | 2019-04-02 |
| CN109556414B CN109556414B (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710886111.0A Active CN109556414B (en) | 2017-09-27 | 2017-09-27 | Method and device for utilizing waste heat of aluminum hydroxide roasting furnace product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577327A (en) * | 2019-09-29 | 2021-03-30 | 沈阳铝镁设计研究院有限公司 | Novel alumina heat recovery device |
Citations (5)
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|---|---|---|---|---|
| CN2805873Y (en) * | 2005-04-26 | 2006-08-16 | 贵阳铝镁设计研究院 | Apparatus for improving raw liquor evaporation temperature |
| CN1868881A (en) * | 2005-05-25 | 2006-11-29 | 贵阳铝镁设计研究院 | Technological process method of producing aluminium oxide using high aluminium slag |
| CN102435076A (en) * | 2010-09-29 | 2012-05-02 | 中国铝业股份有限公司 | Waste heat utilization method for fluidized-bed roaster in alumina production |
| CN102515231A (en) * | 2011-12-22 | 2012-06-27 | 东北大学设计研究院（有限公司） | Apparatus and method for production of high temperature alumina with circulating fluidized bed roasting furnace |
| CN103723750A (en) * | 2012-10-15 | 2014-04-16 | 沈阳铝镁设计研究院有限公司 | Circulating cooling method and apparatus used for roasting aluminum oxide |
-
2017
- 2017-09-27 CN CN201710886111.0A patent/CN109556414B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2805873Y (en) * | 2005-04-26 | 2006-08-16 | 贵阳铝镁设计研究院 | Apparatus for improving raw liquor evaporation temperature |
| CN1868881A (en) * | 2005-05-25 | 2006-11-29 | 贵阳铝镁设计研究院 | Technological process method of producing aluminium oxide using high aluminium slag |
| CN102435076A (en) * | 2010-09-29 | 2012-05-02 | 中国铝业股份有限公司 | Waste heat utilization method for fluidized-bed roaster in alumina production |
| CN102515231A (en) * | 2011-12-22 | 2012-06-27 | 东北大学设计研究院（有限公司） | Apparatus and method for production of high temperature alumina with circulating fluidized bed roasting furnace |
| CN103723750A (en) * | 2012-10-15 | 2014-04-16 | 沈阳铝镁设计研究院有限公司 | Circulating cooling method and apparatus used for roasting aluminum oxide |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112577327A (en) * | 2019-09-29 | 2021-03-30 | 沈阳铝镁设计研究院有限公司 | Novel alumina heat recovery device |
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| CN109556414B (en) | 2020-06-12 |
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