CN109847551A - A kind of aluminum oxide roasting furnace flue gas becomes Zero discharging system - Google Patents
A kind of aluminum oxide roasting furnace flue gas becomes Zero discharging system Download PDFInfo
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- CN109847551A CN109847551A CN201910120942.6A CN201910120942A CN109847551A CN 109847551 A CN109847551 A CN 109847551A CN 201910120942 A CN201910120942 A CN 201910120942A CN 109847551 A CN109847551 A CN 109847551A
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- Prior art keywords
- flue gas
- furnace
- reactor
- roaster
- aluminum oxide
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000003546 flue gas Substances 0.000 title claims abstract description 49
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 238000007599 discharging Methods 0.000 title claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 18
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 14
- 239000012716 precipitator Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 5
- 230000023556 desulfurization Effects 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 239000005864 Sulphur Substances 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
Become Zero discharging system the invention proposes a kind of aluminum oxide roasting furnace flue gas, including the main furnace of roaster, roast secondary furnace, the pre- hot cyclone separator of second level, SNCR reactor, SCR reactor, primary cyclone, electrostatic precipitator, cooling, desulfurizing tower, wet electrical dust precipitator and chimney, the burner hearth of the main furnace of roaster is as SNCR reactor, exhanst gas outlet is connected with secondary furnace is roasted after the denitration of the SNCR reactor, successively flow direction roasts secondary furnace to flue gas in the main furnace of roaster after SNCR reactor, the pre- hot cyclone separator of second level, SCR reactor, exhanst gas outlet is connected with primary cyclone after the denitration of the SCR reactor, the primary cyclone, electrostatic precipitator, cooling, desulfurizing tower, wet electrical dust precipitator, chimney is sequentially connected along flow of flue gas direction, the chimney Flue gas after dedusting, desulfurization process is discharged into atmosphere.Meet the standard requirements of new environmental protection standard requirement or even the zero-emission that becomes after administering by the collaboration of each environmental protection equipment.
Description
[technical field]
The present invention relates to the technical field of flue gas emission processing system, especially a kind of aluminum oxide roasting furnace flue gas becomes zero-emission
Place system.
[background technique]
The flue gas that alumina roasting furnace comes out at present is discharged into atmosphere after handling by electrostatic precipitator and (only carries out to dust
Processing).Since dust content is high, humidity is big, temperature is high (flue-gas temperature reaches as high as 400 DEG C when opening furnace) in flue gas, dust
Main component is aluminium oxide, and dedusting effect of electrostatic deduster is bad, exports dust emission generally in 30~50mg/Nm3, in flue gas
SO2(general 200mg/Nm3Left and right), NOx(general 250mg/Nm3Left and right) etc. pollutants do not administered effectively, Wu Faman
The new environment protection emission requirement of foot.
Since roaster operating condition, smoke components have large effect, flue gas warp to the efficiency of dust collection of electrostatic precipitator
After crossing electrostatic precipitator technical treatment, particulate matter minimum discharge in outlet is only able to achieve 30mg/Nm3Left and right, however June 13 in 2017
Day, Chinese Ministry of Environmental Protection consults on " aluminum i ndustry pollutant emission standard modifies the uncontrollable discharge that will keep under strict control again " standard modification list
Original text is issued in the form of announcing, oxidation of the new discharge standard from October 1st, 2017 in the urban area Jing-jin-ji region " 2+26 "
Aluminium enterprise executes in advance, and region-by-region Alumina Enterprise will be executed from January 1st, 2019.Aluminium oxide is defined in new standard
The particulate matter of factory is lower than 10mg/Nm3、SO2Lower than 100mg/Nm3、NOxLower than 100mg/Nm3Emission limit；
Therefore the existing smoke processing system of Alumina Enterprise has been unable to meet new environmental protection standard requirement, it is proposed that a kind of oxygen
Change aluminium baking furnace fume to become Zero discharging system.
[summary of the invention]
The object of the invention is to solve the problems of the prior art, propose that a kind of aluminum oxide roasting furnace flue gas becomes zero-emission
System can meet the standard requirements of new environmental protection standard requirement or even the zero-emission that becomes.
To achieve the above object, become Zero discharging system the invention proposes a kind of aluminum oxide roasting furnace flue gas, including roasting
The main furnace of furnace, the secondary furnace of roasting, the pre- hot cyclone separator of second level, SNCR reactor, SCR reactor, primary cyclone, electrostatic remove
Dirt device, cooling, desulfurizing tower, wet electrical dust precipitator and chimney, the burner hearth of the main furnace of roaster are described as SNCR reactor
Exhanst gas outlet is connected with secondary furnace is roasted after the denitration of SNCR reactor, the roasting secondary furnace, the pre- hot cyclone separator of second level, SCR
Reactor is sequentially connected along flow of flue gas direction, the successively flow direction roasting after SNCR reactor of the flue gas in the main furnace of roaster
The pre- hot cyclone separator of secondary furnace, second level, SCR reactor, exhanst gas outlet is separated with one cyclonic after the denitration of the SCR reactor
Device is connected, and the primary cyclone, electrostatic precipitator, cooling, desulfurizing tower, wet electrical dust precipitator, chimney are along flow of flue gas side
To being sequentially connected, the flue gas after dedusting, desulfurization process is discharged into atmosphere by the chimney.
Preferably, being equipped with multiple demisters, spray equipment in the cooling, desulfurizing tower, the demister is installed on
The top of spray equipment, the spray equipment are connected with circulating pump.
Preferably, be connected between the cooling, desulfurizing tower and electrostatic precipitator by air-introduced machine, the cigarette of the air-introduced machine
Gas import is connected with the exhanst gas outlet of electrostatic precipitator, and it is de- that the flue gas in electrostatic precipitator from the main furnace of roaster is introduced cooling
Sulphur tower.
Preferably, being equipped with yin-yang electrode systems, spray equipment and high-voltage rectifying transformer, institute in the wet electrical dust precipitator
State the top that spray equipment is installed on yin-yang electrode systems.
Preferably, raw material drying device is connected between the SCR reactor and cyclone separator, the raw material drying device
Exhanst gas outlet be connected with the gas inlet of cyclone separator.
Beneficial effects of the present invention: the present invention meets new environmental protection standard requirement even after administering by the collaboration of each environmental protection equipment
Become the standard requirements of zero-emission, and advantage is:
1, the collaboration through each equipment of this system is administered, and can effectively remove dust in flue gas, SO simultaneously2、NOxEtc. a variety of pollutions
The discharge of object meets the standard requirements of new environmental protection standard requirement or even the zero-emission that becomes；
2, reasonable position is chosen in alumina roasting furnace the technological process line selects suitable denitration technology to carry out NOxHave
Effect processing, while the technique of roaster will not be had an impact.
Feature and advantage of the invention will be described in detail by embodiment combination attached drawing.
[Detailed description of the invention]
Fig. 1 is that a kind of aluminum oxide roasting furnace flue gas of the present invention becomes the schematic diagram of Zero discharging system.
[specific embodiment]
A kind of aluminum oxide roasting furnace flue gas of the invention becomes Zero discharging system refering to fig. 1, including the main furnace 1 of roaster, roasting are secondary
The pre- hot cyclone separator 3 of furnace 2, second level, SNCR reactor 4, SCR reactor 5, primary cyclone 9, electrostatic precipitator 10,
Cooling, desulfurizing tower 12, wet electrical dust precipitator 16 and chimney 20, the burner hearth of the main furnace 1 of roaster are described as SNCR reactor 4
Exhanst gas outlet is connected with secondary furnace 2 is roasted after the denitration of SNCR reactor 4, the roasting pair furnace 2, the pre- hot cyclone separator 3 of second level,
SCR reactor 5 is sequentially connected along flow of flue gas direction, and the flue gas in the main furnace 1 of roaster successively flows after SNCR reactor 4
To roasting secondary furnace 2, the pre- hot cyclone separator 3 of second level, SCR reactor 5, exhanst gas outlet and one after the denitration of the SCR reactor 5
Grade cyclone separator 9 is connected, the primary cyclone 9, electrostatic precipitator 10, cooling, desulfurizing tower 12, wet electrical dust precipitator
16, chimney 20 is sequentially connected along flow of flue gas direction, and the flue gas after dedusting, desulfurization process is discharged into atmosphere by the chimney 20.
Multiple demisters 13, spray equipment 14 are equipped in the cooling, desulfurizing tower 12, the demister 13 is installed on spray equipment
14 top, the spray equipment 14 are connected with circulating pump 15.Pass through between the cooling, desulfurizing tower 12 and electrostatic precipitator 10
Air-introduced machine 11 is connected, and the gas inlet of the air-introduced machine 11 is connected with the exhanst gas outlet of electrostatic precipitator 10, by electrostatic precipitator
Flue gas in 10 from the main furnace 1 of roaster introduces cooling, desulfurizing tower 12.Yin-yang electrode systems are equipped in the wet electrical dust precipitator 16
17, spray equipment 18 and high-voltage rectifying transformer 19, the spray equipment 18 are installed on the top of yin-yang electrode systems 17.It is described
Raw material drying device 8, the exhanst gas outlet and whirlwind of the raw material drying device 8 are connected between SCR reactor 5 and cyclone separator 9
The gas inlet of separator 9 is connected, and is equipped with catalyst layer 6 and soot blower 7 in the SCR reactor 5.
The course of work of the present invention:
A kind of aluminum oxide roasting furnace flue gas of the present invention becomes Zero discharging system, working principle are as follows:
1 flue gas of alumina roasting furnace enters electrostatic precipitator 10 after the pre- hot cyclone separator 9 of level-one, passes through electrostatic precipitation
The processing of device 10 exports dust emission generally in 30~50mg/Nm3；Enter cooling, desulfurizing tower 12 by air-introduced machine 11, it is de- through cooling down
Under the collective effect of sulphur tower spray equipment 14, demister 13 and lye, flue gas is made to become to be saturated wet flue gas, wet type electricity can be met
Deduster 16 operate normally need to for saturated flue gas condition, flue-gas temperature be down to 75 DEG C or so, dust concentration be down to 20~30mg/
Nm3、SO2Concentration is down to 100mg/Nm3Even 35mg/Nm3Below；Again through 16 yin-yang electrode systems 17 of wet electrical dust precipitator, high repoussage
Convertor transformer 19, spray equipment 18 collective effect under, dust concentration is down to 10mg/Nm3Even 5mg/Nm3Below；Through dedusting,
Flue gas after desulfurization process is discharged into atmosphere by chimney 20；
Wherein, 1000~1050 DEG C of temperature of the main furnace 1 of roaster are the reasonable temperature ranges of SNCR Technical comparing, are utilized
Main furnace burner hearth sprays into ammonium hydroxide or urea liquid into main furnace as reactor, by the NO in flue gasxIt is reduced into N2, after reacted
NOxConcentration is down to 150mg/Nm3Left and right；Flue gas carries out SCR reactor 5 after being fired the pre- hot cyclone separator 3 of secondary furnace 2, second level,
Dust concentration after the pre- hot cyclone separator 3 of second level in flue gas is greatly lowered, 320~380 DEG C of flue-gas temperature, is SCR skill
The more reasonable region of art, using the excessive ammonia or urea liquid sprayed into main furnace in SCR under the collective effect of catalyst
Again by the NO in flue gas in reactor 5xIt is reduced into N2, reacted rear NOxConcentration is down to 100mg/Nm3Even 50mg/Nm3Below；
Each environmental protection equipment collaboration meets the standard requirements of new environmental protection standard requirement or even the zero-emission that becomes after administering.
Above-described embodiment is the description of the invention, is not limitation of the invention, after any pair of simple transformation of the present invention
Scheme all belong to the scope of protection of the present invention.
Claims (5)
- The Zero discharging system 1. a kind of aluminum oxide roasting furnace flue gas becomes, it is characterised in that: including the main furnace of roaster (1), roast secondary furnace (2), the pre- hot cyclone separator of second level (3), SNCR reactor (4), SCR reactor (5), primary cyclone (9), electrostatic remove The burner hearth of dirt device (10), cooling, desulfurizing tower (12), wet electrical dust precipitator (16) and chimney (20), the main furnace of roaster (1) is made For SNCR reactor (4), exhanst gas outlet is connected with secondary furnace (2) is roasted after the denitration of the SNCR reactor (4), and the roasting is secondary Furnace (2), the pre- hot cyclone separator of second level (3), SCR reactor (5) are sequentially connected along flow of flue gas direction, the main furnace of roaster (1) successively flow direction roasts secondary furnace (2), the pre- hot cyclone separator of second level (3), SCR reaction to the flue gas in after SNCR reactor (4) Device (5), exhanst gas outlet is connected with primary cyclone (9) after the denitration of the SCR reactor (5), the one cyclonic point From device (9), electrostatic precipitator (10), cooling, desulfurizing tower (12), wet electrical dust precipitator (16), chimney (20) along flow of flue gas direction It is sequentially connected, the flue gas after dedusting, desulfurization process is discharged into atmosphere by the chimney (20).
- The Zero discharging system 2. a kind of aluminum oxide roasting furnace flue gas as described in claim 1 becomes, it is characterised in that: the cooling is de- Multiple demisters (13), spray equipment (14) are equipped in sulphur tower (12), the demister (13) is installed on spray equipment (14) top, the spray equipment (14) are connected with circulating pump (15).
- The Zero discharging system 3. a kind of aluminum oxide roasting furnace flue gas as described in claim 1 becomes, it is characterised in that: the cooling is de- It is connected between sulphur tower (12) and electrostatic precipitator (10) by air-introduced machine (11), the gas inlet and electrostatic of the air-introduced machine (11) The exhanst gas outlet of deduster (10) is connected, and it is de- that the flue gas in electrostatic precipitator (10) from the main furnace of roaster (1) is introduced cooling Sulphur tower (12).
- The Zero discharging system 4. a kind of aluminum oxide roasting furnace flue gas as described in claim 1 becomes, it is characterised in that: the wet type electricity Yin-yang electrode systems (17), spray equipment (18) and high-voltage rectifying transformer (19), the spray equipment are equipped in deduster (16) (18) it is installed on the top of yin-yang electrode systems (17).
- The Zero discharging system 5. a kind of aluminum oxide roasting furnace flue gas as described in claim 1 becomes, it is characterised in that: the SCR is anti- It answers and is connected between device (5) and cyclone separator (9) raw material drying device (8), the exhanst gas outlet of the raw material drying device (8) and rotation The gas inlet of wind separator (9) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120942.6A CN109847551A (en) | 2019-02-19 | 2019-02-19 | A kind of aluminum oxide roasting furnace flue gas becomes Zero discharging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120942.6A CN109847551A (en) | 2019-02-19 | 2019-02-19 | A kind of aluminum oxide roasting furnace flue gas becomes Zero discharging system |
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| CN109847551A true CN109847551A (en) | 2019-06-07 |
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|---|---|---|---|
| CN201910120942.6A Pending CN109847551A (en) | 2019-02-19 | 2019-02-19 | A kind of aluminum oxide roasting furnace flue gas becomes Zero discharging system |
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Citations (6)
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|---|---|---|---|---|
| CN204574069U (en) * | 2015-02-06 | 2015-08-19 | 浙江大学 | Coal fired power plant minimum discharge environmental protection island system |
| CN106621752A (en) * | 2016-12-23 | 2017-05-10 | 沈阳鑫博工业技术股份有限公司 | Fume denitration device for aluminum oxide suspension calcinator and use method thereof |
| CN106861348A (en) * | 2017-04-17 | 2017-06-20 | 盐城诚达环保工程有限公司 | Wet-esp structure |
| CN107246805A (en) * | 2017-07-21 | 2017-10-13 | 沈阳鑫博工业技术股份有限公司 | A kind of Aluminium hydroxide roasting kiln gas processing unit and method |
| CN107281915A (en) * | 2017-07-19 | 2017-10-24 | 中国科学院过程工程研究所 | SNCR and SCR the combination denitrating system and method for denitration of a kind of aluminium oxide calcining flue gas |
| CN210410140U (en) * | 2019-02-19 | 2020-04-28 | 浙江菲达环保科技股份有限公司 | Smoke zero-emission-tendency system of aluminum oxide roasting furnace |
-
2019
- 2019-02-19 CN CN201910120942.6A patent/CN109847551A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204574069U (en) * | 2015-02-06 | 2015-08-19 | 浙江大学 | Coal fired power plant minimum discharge environmental protection island system |
| CN106621752A (en) * | 2016-12-23 | 2017-05-10 | 沈阳鑫博工业技术股份有限公司 | Fume denitration device for aluminum oxide suspension calcinator and use method thereof |
| CN106861348A (en) * | 2017-04-17 | 2017-06-20 | 盐城诚达环保工程有限公司 | Wet-esp structure |
| CN107281915A (en) * | 2017-07-19 | 2017-10-24 | 中国科学院过程工程研究所 | SNCR and SCR the combination denitrating system and method for denitration of a kind of aluminium oxide calcining flue gas |
| CN107246805A (en) * | 2017-07-21 | 2017-10-13 | 沈阳鑫博工业技术股份有限公司 | A kind of Aluminium hydroxide roasting kiln gas processing unit and method |
| CN210410140U (en) * | 2019-02-19 | 2020-04-28 | 浙江菲达环保科技股份有限公司 | Smoke zero-emission-tendency system of aluminum oxide roasting furnace |
Non-Patent Citations (1)
| Title |
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