CN105485670B - The optimization combustion method and special equipment of a kind of alumina producer gaseous pollutant control - Google Patents
The optimization combustion method and special equipment of a kind of alumina producer gaseous pollutant control Download PDFInfo
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- CN105485670B CN105485670B CN201410479733.8A CN201410479733A CN105485670B CN 105485670 B CN105485670 B CN 105485670B CN 201410479733 A CN201410479733 A CN 201410479733A CN 105485670 B CN105485670 B CN 105485670B
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The present invention relates to alumina producer gaseous pollutant control field, the optimization combustion method and special equipment of gaseous pollutant control in specially a kind of alumina producer calcining process.On cooling cyclone CO1 top exits to the pipeline between main roaster PO4 bottoms, using two stage combustion process, 5%~10% of gas quantity volume used in gas suspension calcination is passed through in first paragraph burning process, combustion heat release heats up to combustion air；Remaining combustion gas and combustion air mixed combustion in second segment burning process.The preheated burning device of level Four preheating is installed on cooling cyclone CO1 to main roaster PO4 pipeline bending place preheated burning pipe, combustion air is preheated stage by stage step by step.Enter installation main burner at combustion air in main roaster PO4 bottoms, be passed through 90%~95% of gas quantity volume used in gas suspension calcination.Present invention process is simple, and process is few, and equipment investment is few, and achievement is quick, and product quality is high and environment protecting is notable.
Description
Technical field
The present invention relates to alumina producer gaseous pollutant control field, gaseous state in specially a kind of alumina producer calcining process
The optimization combustion method and special equipment of suspension roaster.
Background technology
At present, for gaseous pollutant control due to low with energy resource consumption, the daily output is big, and at home and abroad alumina producer is using non-
Often extensively, its fuel is mainly used as origin of heat with natural gas, coke-stove gas and producer gas etc..But along with China
The fast development of social economy, the requirement and environmental protection to product quality are more and more stricter, and gaseous pollutant control is pyrogenic process
Metallurgy, caused exhaust gas volumn is huge, and harmful substances from flue gases is more, follow-up environmental protection treatment expense is added, by right
The optimization and improvement of gaseous pollutant control, product quality is on the one hand improved, on the one hand reduces the content of harmful substances from flue gases,
So as to reduce the production cost of alumina producer accordingly.
The content of the invention
In order to solve the above-mentioned technical problem, it is an object of the invention to provide a kind of alumina producer gaseous pollutant control
Optimize combustion method and special equipment, alumina producer finished product rate can be improved, improve roasted product quality, and reach flue gas
To environmental requirement, the discharge of poisonous waste such as oxynitrides and carbon monoxide in flue gas are reduced, reach environment-friendly high-efficiency requirement.
For the above-mentioned purpose, the technical scheme is that：
A kind of optimization combustion method of alumina producer gaseous pollutant control, in cooling cyclone CO1 top exits to master
On pipeline between roaster PO4 bottoms, using two stage combustion process, gas suspension calcination institute is passed through in first paragraph burning process
With the 5%~10% of gas quantity volume, combustion heat release heats up to combustion air；Remaining combustion gas in second segment burning process
With combustion air mixed combustion.
The optimization combustion method of described alumina producer gaseous pollutant control, first paragraph burning process in 5%~10%
Fuel gas buring releases heat, and combustion air is significantly heated up, so that combustion air reaches a higher temperature, will
Combustion air temperature from cooling cyclone CO1 brings up to 900 DEG C~1000 DEG C, and caused cigarette from 700 DEG C~800 DEG C
Oxysome in combustion air is accumulated concentration dilution to 2%~10% by tolerance.
The optimization combustion method of described alumina producer gaseous pollutant control, combustion air is by heating and flue gas dilution
Afterwards, become the combustion air of high-temperature low-oxygen concentration in second segment burning process and remaining combustion gas mixing, burnt.
The optimization combustion method of described alumina producer gaseous pollutant control, in cooling cyclone CO1 to main roaster
The preheated burning device of level Four preheating is installed on PO4 pipeline bending place preheated burning pipe, combustion air is carried out step by step stage by stage
Preheating.
The optimization combustion method of described alumina producer gaseous pollutant control, enter combustion-supporting sky in main roaster PO4 bottoms
Main burner is installed at gas, is passed through 90%~95% of gas quantity volume used in gas suspension calcination.
The special equipment of the optimization combustion method of described alumina producer gaseous pollutant control, the equipment include main roasting
Stove PO4, aluminium hydroxide import, main burning pipe, preheated burning pipe, combustion-aid air pipe, main burner, preheated burning device and whirlwind are cold
But device CO1, concrete structure are as follows：
In main roaster PO4 bottoms to passing through S-shaped pipeline connection, the S-shaped pipeline between cooling cyclone CO1 top exits
On set gradually main burning pipe, preheated burning pipe, combustion-aid air pipe, main burner is set on main burning pipe, on preheated burning pipe
Preheated burning device is set；One end of combustion-aid air pipe communicates with cooling cyclone CO1 top exits, the other end of combustion-aid air pipe
Communicated with the entrance point of preheated burning pipe；The port of export of preheated burning pipe connects with the entrance point of main burning pipe, main burning pipe
The port of export is connected with main roaster PO4 entrance point, and aluminium hydroxide import is set on main roaster PO4.
Described special equipment, combustion-aid air pipe are flat inverted-loop tube, and preheated burning pipe is the V-arrangement pipe of bending structure, V
The both sides of shape pipe are symmetrical arranged two-stage preheated burning device, level Four preheated burning device are formed, using V-arrangement pipe and level Four preheated burning
Device, combustion gas is set to be sufficiently mixed with combustion air, by the way that heating ensures that combustion air reaches from 700 DEG C~800 DEG C stage by stage step by step
900 DEG C~1000 DEG C of setting, and increase exhaust gas volumn, with fully dilute the oxygen volumetric concentration 2% in combustion air~
10%.
The present invention design philosophy be：
Present invention optimization combustion technology is to use two stage combustion process.First paragraph burning process passes first into a small amount of combustion gas
Burnt, fuel gas buring releases the temperature that heat further improves combustion air, and the flue gas product after burning is mixed into combustion-supporting sky
In gas, so as to dilute the concentration of oxygen in combustion air；High-temperature low-oxygen combustion air enters second segment burning process, due to combustion-supporting
Air themperature greatly improves, and can be significantly expanded combustion zone and improve the roasting quality of product aluminum oxide；Low oxygen combustion makes
Combustion zone expands and is evenly distributed in roaster, and fuel gas buring is complete, eliminates concentrated combustion region, reduces nitrogen oxygen in flue gas
The content of compound and carbon monoxide.
The advantages of the present invention are as follows：
1st, the present invention further improves the temperature of combustion air, combustion air by carrying out preheated burning to combustion air
Temperature it is higher, the main roaster PO4 fuel gas burings of its gaseous pollutant control are more abundant, avoid combustion gas because of imperfect combustion
Cause the waste of combustion gas, caused flue gas is diluted to combustion air after fuel gas buring in preheated burning device, is helped so as to reduce
The oxygen concentration of air is fired, combustion air is reached a high temperature hypoxia；When in very high temperature, oxygen contains combustion air in stove
Measure for 2% when combustion reaction can occur, and combustion zone is evenly distributed, and avoids concentrated combustion, and overall distribution, aluminum oxide is presented
Finished product rate is high, and quality is good.
2nd, the present invention makes in main roaster PO4 that burning area distribution is uniformly extensive using optimization combustion technology, change with
Preceding traditional centralized combustion zone, so that central temperature reduces, reduce due to thermodynamics nitrogen oxygen caused by localized regions of elevated temperature
Compound, the content of oxynitrides in flue gas is reduced, flue gas is reached the requirement of environmental protection；The combustion air of low oxygen concentration makes master
Burning area distribution is uniform in roaster PO4, eliminates localized hyperthermia's phenomenon, avoids causing equipment and refractory material very serious
Influence.
3rd, calcining process energy consumption accounts for 25%~30% or so of whole alumina producer energy expenditure, using the roasting of the present invention
Technology, on the one hand improves the quality of alumina product, the harmful components in flue gas is on the one hand reduced, so as to improve alumina producer
Competitiveness.
4th, present invention process is simple, and process is few, and equipment investment is few, and achievement is quick, and product quality is high and environment protecting shows
Write.
Brief description of the drawings
Fig. 1 is the flow chart of the optimization combustion method of alumina producer gaseous pollutant control of the present invention.In figure, 1 hydroxide
Aluminium import；2 main burning pipes；3 preheated burning pipes；4 combustion-aid air pipes；5 main burners；6 preheated burning devices.
Embodiment
Embodiments of the invention combination accompanying drawing is described in detail in below, but protection scope of the present invention is not by embodiment
Limited.
As shown in figure 1, the optimization combustion apparatus of alumina producer gaseous pollutant control of the present invention include main roaster PO4,
Aluminium hydroxide import 1, main burning pipe 2, preheated burning pipe 3, combustion-aid air pipe 4, main burner 5, preheated burning device 6 and whirlwind are cold
But device CO1 etc., concrete structure is as follows：
In main roaster PO4 bottoms to passing through S-shaped pipeline connection, the S-shaped pipeline between cooling cyclone CO1 top exits
On set gradually main burning pipe 2, preheated burning pipe 3, combustion-aid air pipe 4, main burner 5, preheated burning are set on main burning pipe 2
Preheated burning device 6 is set on pipe 3；One end of combustion-aid air pipe 4 communicates with cooling cyclone CO1 top exits, combustion-aid air pipe 4
The other end communicated with the entrance point of preheated burning pipe 3；The port of export of preheated burning pipe 3 connects with the entrance point of main burning pipe 2,
The port of export of main burning pipe 2 is connected with main roaster PO4 entrance point, and aluminium hydroxide import 1 is set on main roaster PO4.
Combustion-aid air pipe 4 is flat inverted-loop tube, and combustion air is by rising, horizontal and decline flow direction, can make
Combustion air steadily enters preheated burning pipe 3.Preheated burning pipe 3 is the V-arrangement pipe of bending structure, and the both sides of V-arrangement pipe are symmetrical arranged
Two-stage preheated burning device 6, form level Four preheated burning device.Using specific V-arrangement pipe and level Four preheated burning device, it can buffer and help
The flow velocity of air, combustion gas and flue gas is fired, combustion gas is sufficiently mixed with combustion air, by the way that heating ensures combustion-supporting sky stage by stage step by step
Gas reach setting from 700 DEG C~800 DEG C 900 DEG C~1000 DEG C, and increase exhaust gas volumn, fully to dilute in combustion air
Oxygen volumetric concentration 2%~10%.
The optimization combustion method of alumina producer gaseous pollutant control of the present invention, main roaster PO4 use two stage combustion work
Sequence, 5%~10% combustion gas is passed through in first paragraph burning process, combustion heat release heats up to combustion air；Second segment burns
Combustion gas and combustion air mixed combustion in process.When combustion air enters main roaster PO4, led in preheated burning device first
Enter a small amount of combustion gas to be burnt, on the one hand improve the temperature of combustion air, on the one hand dilute oxygen content in combustion air.Then,
Combustion air after heating and dilution is with carrying out combustion reaction at main burner.
Embodiment
Alumina producer gaseous pollutant control of the present invention optimizes combustion technology, using two stage combustion process.First paragraph burns
5%~10% of combustion gas volume used in gas suspension calcination is passed through in process, passes through fuel gas buring heat release spin in future air cooling
Device CO1 combustion air is heated to 900 DEG C~1000 DEG C or so from 700 DEG C~800 DEG C, and caused exhaust gas volumn is by combustion-supporting sky
Oxysome in gas accumulates concentration dilution to 2%~10% or so, and the high-temperature low-oxygen combustion air after first paragraph burns process is the
Two sections of burning processes after remaining a large amount of combustion gas mixing with being burnt.Because the temperature of combustion air greatly improves, so that
Combustion gas is fully burnt in second segment burning process, is reached 100% state, has been avoided caused by non-complete combustion of fuel the energy
Waste.Low oxygen combustion expands burning region area in main roaster PO4, and in-furnace temperature is evenly distributed, and takes off aluminium hydroxide
The high conversion rate of water reaction generation aluminum oxide, finished product rate is high, good product quality, avoids reducing production because of concentrated combustion in stove
Product burn till rate, reduce the discharge capacity of oxynitrides and carbon monoxide.
As a result show, the method can significantly improve the combustion efficiency of combustion gas in alumina producer calcining process, reduces in flue gas
The discharge capacity of oxynitrides and carbon monoxide harmful substance, product quality is high after roasting, increases enterprise vitality and competitiveness.This
Invention is low with equipment cost, and energy consumption is small, simple to operate, and usability is strong, has good industrial prospect.
Claims (6)
1. the special equipment of the optimization combustion method of a kind of alumina producer gaseous pollutant control, it is characterised in that cold in whirlwind
But on device CO1 top exits to the pipeline between main roaster PO4 bottoms, using two stage combustion process, first paragraph burning process
In be passed through 5%~10% of gas quantity volume used in gas suspension calcination, combustion heat release heats up to combustion air；Second segment
Remaining combustion gas and combustion air mixed combustion in process of burning；The equipment includes main roaster PO4, aluminium hydroxide import, master
Combustion tube, preheated burning pipe, combustion-aid air pipe, main burner, preheated burning device and cooling cyclone CO1, concrete structure are as follows：
Main roaster PO4 bottoms between cooling cyclone CO1 top exits by S-shaped pipeline connection, on the S-shaped pipeline according to
It is secondary that main burning pipe, preheated burning pipe, combustion-aid air pipe are set, main burner is set on main burning pipe, set on preheated burning pipe
Preheated burning device；One end of combustion-aid air pipe communicates with cooling cyclone CO1 top exits, the other end of combustion-aid air pipe with it is pre-
The entrance point of hot combustion tube communicates；The port of export of preheated burning pipe connects with the entrance point of main burning pipe, the outlet of main burning pipe
End is connected with main roaster PO4 entrance point, and aluminium hydroxide import is set on main roaster PO4.
2. special equipment according to claim 1, it is characterised in that combustion-aid air pipe is flat inverted-loop tube, preheated burning
The V-arrangement pipe for bending structure is managed, the both sides of V-arrangement pipe are symmetrical arranged two-stage preheated burning device, form level Four preheated burning device, use
V-arrangement pipe and level Four preheated burning device, make combustion gas be sufficiently mixed with combustion air, by the way that heating ensures combustion air stage by stage step by step
Reach setting from 700 DEG C~800 DEG C 900 DEG C~1000 DEG C, and increase exhaust gas volumn, fully to dilute in combustion air
Oxygen volumetric concentration 2%~10%.
3. special equipment according to claim 1, it is characterised in that 5%~10% combustion gas is fired in first paragraph burning process
Burn and release heat, combustion air is significantly heated up, so that combustion air reaches a higher temperature, spin in the future
Forced air cooler CO1 combustion air temperature brings up to 900 DEG C~1000 DEG C from 700 DEG C~800 DEG C, and caused exhaust gas volumn will
Oxysome in combustion air accumulates concentration dilution to 2%~10%.
4. special equipment according to claim 1, it is characterised in that combustion air becomes by heating up with after flue gas dilution
Into high-temperature low-oxygen concentration combustion air in second segment burning process and remaining combustion gas mixing, burnt.
5. special equipment according to claim 1, it is characterised in that the pipe in cooling cyclone CO1 to main roaster PO4
The preheated burning device of level Four preheating is installed on the preheated burning pipe of road bending place, combustion air is preheated stage by stage step by step.
6. special equipment according to claim 1, it is characterised in that enter in main roaster PO4 bottoms at combustion air and pacify
Main burner is filled, is passed through 90%~95% of gas quantity volume used in gas suspension calcination.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410479733.8A CN105485670B (en) | 2014-09-18 | 2014-09-18 | The optimization combustion method and special equipment of a kind of alumina producer gaseous pollutant control |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410479733.8A CN105485670B (en) | 2014-09-18 | 2014-09-18 | The optimization combustion method and special equipment of a kind of alumina producer gaseous pollutant control |
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| Publication Number | Publication Date |
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| CN105485670A CN105485670A (en) | 2016-04-13 |
| CN105485670B true CN105485670B (en) | 2018-03-20 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107606949A (en) * | 2017-09-27 | 2018-01-19 | 河南科达东大国际工程有限公司 | A kind of gas suspension calcination of aluminium hydroxide stove low-temperature bake device |
| CN107559826B (en) * | 2017-10-10 | 2024-05-10 | 安徽科达洁能股份有限公司 | Graded combustion system of suspension roasting furnace and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0666421A (en) * | 1992-02-07 | 1994-03-08 | Furness Techno:Kk | Combustion device |
| CN101870492A (en) * | 2010-07-14 | 2010-10-27 | 河南东大泰隆冶金科技有限公司 | New technology for gas suspension calcination of aluminium hydroxide |
| CN103708515A (en) * | 2014-01-10 | 2014-04-09 | 洛阳水泥工程设计研究院有限公司 | Method for producing alpha-Al2O3 by employing predecomposition technology and taking aluminium hydrogen as raw material |
| CN103771476A (en) * | 2014-01-26 | 2014-05-07 | 郑州金阳光陶瓷有限公司 | Method for producing alpha-aluminum oxide by utilizing gas-suspension roasting furnace |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100095649A1 (en) * | 2008-10-20 | 2010-04-22 | General Electric Company | Staged combustion systems and methods |
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2014
- 2014-09-18 CN CN201410479733.8A patent/CN105485670B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0666421A (en) * | 1992-02-07 | 1994-03-08 | Furness Techno:Kk | Combustion device |
| CN101870492A (en) * | 2010-07-14 | 2010-10-27 | 河南东大泰隆冶金科技有限公司 | New technology for gas suspension calcination of aluminium hydroxide |
| CN103708515A (en) * | 2014-01-10 | 2014-04-09 | 洛阳水泥工程设计研究院有限公司 | Method for producing alpha-Al2O3 by employing predecomposition technology and taking aluminium hydrogen as raw material |
| CN103771476A (en) * | 2014-01-26 | 2014-05-07 | 郑州金阳光陶瓷有限公司 | Method for producing alpha-aluminum oxide by utilizing gas-suspension roasting furnace |
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| CN105485670A (en) | 2016-04-13 |
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