CN106257141A - A kind of sintering mine sensible heat reclaims flue gas denitrification system and its implementation simultaneously - Google Patents
A kind of sintering mine sensible heat reclaims flue gas denitrification system and its implementation simultaneously Download PDFInfo
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- CN106257141A CN106257141A CN201610857798.0A CN201610857798A CN106257141A CN 106257141 A CN106257141 A CN 106257141A CN 201610857798 A CN201610857798 A CN 201610857798A CN 106257141 A CN106257141 A CN 106257141A
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- Prior art keywords
- sintering
- flue gas
- temperature
- gas
- sensible heat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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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
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
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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
-
- 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
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
-
- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The present invention relates to a kind of sintering mine sensible heat and reclaim flue gas denitrification system and its implementation simultaneously, described method be by sintering machine out two-way sintering flue gas after cleaner unit, one road sintering flue gas carries out heat exchange and is warming up to 450 DEG C 650 DEG C and mixes with the sintering flue gas that another road temperature is 100 DEG C 190 DEG C with the high temperature sintering ore deposit that sintering machine mean temperature out is 600 DEG C 1000 DEG C, temperature enters SCR reactor after reaching 200 DEG C 400 DEG C, catalytic reduction reaction is carried out in SCR reactor, the nitrogen oxides completing to sinter in flue gas is removed, go the sintering flue gas after denitrification to enter back into waste heat boiler and carry out flue gas heat recovery.The present invention had both solved sintering flue gas NOx at present and had been difficult to removal problem, had the most fully reclaimed sintering deposit and the sensible heat of sintering flue gas, and the sintered, energy saving that achieves truly reduces discharging.
Description
Technical field
The invention belongs to sinter denitrating flue gas and energy recovery field of comprehensive utilization, particularly a kind of sintering mine sensible heat reclaims
Flue gas denitrification system and its implementation simultaneously, i.e. utilizes sintering mine sensible heat to heat sintering flue gas, meets SCR denitration work
The skill requirement to flue-gas temperature, meanwhile, significantly promotes the recovery utilization rate of sintering deposit waste heat.
Background technology
China is iron and steel big producing country, and iron and steel total output height ranks first in the world, and is also National Pollutant Discharge emphasis simultaneously
Monitored object, national steel and iron industry energy resource consumption in 2011 more than 400,000,000 tons of standard coals, accounts for more than the 15% of whole nation total energy consumption, therefore
Energy-saving of Iron And Steel Industry reduction of discharging is the importance of China's energy-saving and emission-reduction work.At present, the NOx produced in steel industry production process
Total amount, accounts for more than the 11% of whole nation total emission volumn, is only second to electric power enterprise, be positioned at the whole nation second, and its discharge capacity is about 1,500,000
T/a ~ 1,800,000 t/a, wherein outside sintering circuit, the NOx of row accounts in production process about the 85% ~ 90% of total amount, due to by agglomerant
Skill and the sintering relatively low restriction of flue-gas temperature, sintering flue gas is only capable of meeting Sulfur Dioxide Emission Allowances, but the most domestic to burning
The removal of the NOx in knot flue gas, is substantially at the blank stage, and only low-temperature SCR or flue gas SCR technology all exist technology
Immature, the shortcoming such as fluctuation of service, denitration efficiency are low or energy consumption is big.
Steel and iron industry is also the branch of industry that AND ENERGY RESOURCES CONSUMPTION IN CHINA is maximum, and China's steel and iron industry is backward, right due to production capacity
Energy-saving and emission-reduction such as pay little attention at the reason, cause China's steel and iron industry average energy loss-rate international most advanced level high by more than 15%, energy-conservation latent
Power is huge, and in steel manufacture process, the energy consumption of sintering circuit accounts for the 9%～12% of total energy consumption, is only second to Iron-smelting, sintering
Energy-conservation in iron and steel enterprise is energy-conservation, occupy highly important status.Heat sinter sensible heat and sintering obvious heat of smoke account for sintering process heat
More than the 50% of consumption, makes full use of the Main way that this part of waste heat is sintered, energy saving.In tradition central cooler residual neat recovering system,
Only the sintering mine sensible heat of about 30% is recycled, and residual heat resources waste is serious.
Summary of the invention
The technical problem to be solved is to provide a kind of sintering mine sensible heat to reclaim simultaneously for above-mentioned prior art
Flue gas denitrification system and its implementation, both solved sintering flue gas NOx at present and be difficult to removal problem, the most fully reclaimed sintering
Ore deposit and the sensible heat of sintering flue gas, the sintered, energy saving that achieves truly reduces discharging.
The present invention solves the technical scheme that the problems referred to above are used: a kind of sintering mine sensible heat reclaims denitrating flue gas system simultaneously
Uniting, it includes sintering machine, and sintering machine is connected with the first exhaust pass and the second exhaust pass respectively, exports cigarette described first
It is separately provided on road and the second exhaust pass removing the electrostatic precipitator of dust in flue gas and by the flue gas in sintering machine
The main exhauster drawn, the sintering flue gas of described first exhaust pass is connected with the air inlet of high efficient heat exchanging stove by aerator,
The high temperature sintering ore deposit discharging opening of described sintering machine is connected with the charging aperture of high efficient heat exchanging stove, the gas outlet of described high efficient heat exchanging stove with
Disposable dust remover is connected, and the gas outlet of described disposable dust remover is connected with flue gas mixing arrangement, the burning of described second exhaust pass
Knot flue gas is connected with the air inlet of flue gas mixing arrangement, connects in the gas outlet of described flue gas mixing arrangement and has for sintering cigarette
Gas carries out the SCR reactor of denitration reaction, and the gas outlet of described SCR reactor connects has one for sintering flue gas heat exchange cooling
Waste heat boiler, the steam (vapor) outlet of described waste heat boiler and an electromotor are connected and generate electricity.
Preferably, the gas outlet of described first exhaust pass and the main exhauster of the second exhaust pass is respectively arranged with
Gas baffle door.
Described first exhaust pass and the second exhaust pass are provided with for pipeline being cut when equipment needs maintenance
Shift to the bypass gas baffle door that bypass runs.
A kind of sintering mine sensible heat reclaims the implementation method of flue gas denitrification system simultaneously, and described method is by sintering machine out
Two-way sintering flue gas is after cleaner unit, and a road sintering flue gas is 600 DEG C 1000 DEG C with sintering machine mean temperature out
High temperature sintering ore deposit carries out heat exchange and is warming up to 450 DEG C 650 DEG C and enters with the sintering flue gas that another road temperature is 100 DEG C 190 DEG C
Row mixing, temperature enters SCR reactor after reaching 200 DEG C 400 DEG C, carries out catalytic reduction reaction, complete in SCR reactor
Nitrogen oxides in sintering flue gas is removed, and goes the sintering flue gas after denitrification to enter back into waste heat boiler and carries out fume afterheat and return
Receive and utilize.
Compared with prior art, it is an advantage of the current invention that:
1, the present invention take full advantage of sintering mine sensible heat to sintering flue gas heat, it is not necessary to the extra consumption energy.
2, the present invention solve at present sintering flue-gas temperature low and cannot the difficult problem of normal denitration, filled up sintering denitration and led
The technological gap in territory.
3, the present invention significantly carries relative to traditional approach (central cooler waste heat recovery) sealing and sintering deposit heat utilization efficiency
Height, sintering mine sensible heat utilizes and improves to about 80% from about 30%, saves mass energy.
4, the present invention is by denitration, Exposure degree and energy three processes of conversion, it is achieved that while sintering denitrating flue gas
The purpose that sintering waste heat reclaims, had both been greatly improved sintering deposit utilization rate of waste heat, eliminated again the NOx in sintering flue gas,
Energy-saving and emission-reduction and control pollution had great social meaning.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As it is shown in figure 1, a kind of sintering mine sensible heat in the present embodiment reclaims flue gas denitrification system simultaneously, including sintering machine 1,
Sintering machine 1 is connected with the first exhaust pass 2 and the second exhaust pass 3 respectively, in described first exhaust pass 2 and the second outlet
It is separately provided on flue 3 removing the electrostatic precipitator 4 of dust in flue gas and the master that the flue gas in sintering machine 1 is drawn being taken out
Blower fan 5, the outlet at described main exhauster 5 is provided with gas baffle door 6, and described first exhaust pass 2 is through gas baffle door 6
Accessed the lower side of high efficient heat exchanging stove 8 afterwards by aerator 7, the high temperature sintering ore deposit on described sintering machine 1 is by high efficient heat exchanging stove 8
Top entry enters, the first exhaust pass 2 low-temperature flue gas (temperature: 100 ° 190 °) being passed through is raw with high temperature sintering mineral products right
The low-temperature flue gas temperature entered by first exhaust pass 2 after punching promotes (temperature reaches 450 ° 650 °), it is achieved heat exchange, described
The gas outlet, top of high efficient heat exchanging stove 8 is connected with disposable dust remover 9, and the sintering flue gas after promoting temperature carries out one-time dedusting,
The gas outlet of described disposable dust remover 9 is connected with flue gas mixing arrangement 10, and described second exhaust pass 3 is through gas baffle door 6
Air inlet with flue gas mixing arrangement 10 is connected afterwards, thus realizes promoting the first outlet cigarette after temperature via high efficient heat exchanging stove 8
The flue gas in road 2 and the flue gas mixing of the second exhaust pass 3, mixed flue gas temperature is substantially improved, and mixed flue gas temperature reaches denitration
Required window temperature (temperature is 200 ° 400 °).
Connect in the gas outlet of described flue gas mixing arrangement 10 and have a SCR reactor 11, in SCR reactor 11, denitration is set
Catalyst, and enter the sintering flue gas in SCR reactor 11 and reached denitration reaction temperature, thus the NOx in sintering flue gas with
Reducing agent carries out catalytic reduction reaction and generates N2, thus removes the NOx compound in flue gas.
The gas outlet of described SCR reactor 11 connects a waste heat boiler 12, and the sintering flue gas removing NOx enters waste heat pot
Stove 12, sintering flue gas carries out heat exchange cooling (temperature is down to 100 ° 150 °) with the heating surface of waste heat boiler 12, thus produces big
The steam of amount, is connected the steam of generation with electromotor 13 by pipeline and generates electricity, it is achieved sintering deposit and sinter obvious heat of smoke
Reclaim comprehensive utilization.
Sintering flue gas after waste heat boiler 12 heat exchange is lowered the temperature accesses the original air and gas system of sintering plant.
When the equipment such as high efficient heat exchanging stove 8, SCR reactor 11 or waste heat boiler 12 need maintenance, can go out by first
The bypass gas baffle door 14 connected on mouth flue 2 and the second exhaust pass 3 switches to bypass and runs, and sintering flue gas passes through sintering
The original air and gas system of factory and chimney 15 discharge, and so do not interfere with the safety in production of whole sintering process.
The present embodiment also provides for a kind of sintering mine sensible heat and reclaims the implementation method of denitrating flue gas simultaneously, and described method is for by burning
Knot machine two-way sintering flue gas out is after cleaner unit, and a road sintering flue gas is 600 with sintering machine mean temperature out
It is 100 DEG C 190 DEG C with another road temperature again that the high temperature sintering ore deposit of DEG C 1000 DEG C carry out heat exchange to be warming up to 450 DEG C 650 DEG C
Sintering flue gas mix, temperature enters SCR reactor after reaching the denitration reaction window temperature of 200 DEG C 400 DEG C,
Carrying out catalytic reduction reaction in SCR reactor, the nitrogen oxides completing to sinter in flue gas is removed, and removes the sintering after denitrification
Flue gas enters back into waste heat boiler and carries out flue gas heat recovery.
In addition to the implementation, present invention additionally comprises other embodiments, all employing equivalents or equivalence to replace
The technical scheme that mode is formed, all should fall within the scope of the hereto appended claims.
Claims (8)
1. sintering mine sensible heat reclaims a flue gas denitrification system simultaneously, and it includes sintering machine (1), and sintering machine (1) is respectively with first
Exhaust pass (2) is connected with the second exhaust pass (3), upper point of described first exhaust pass (2) and the second exhaust pass (3)
It is not provided with the electrostatic precipitator (4) for removing dust in flue gas and the main exhauster drawn by the flue gas in sintering machine (1)
(5), it is characterised in that: the sintering flue gas of described first exhaust pass (2) is entered by aerator (7) and high efficient heat exchanging stove (8)
QI KOU be connected, the high temperature sintering ore deposit discharging opening of described sintering machine (1) is connected with the charging aperture of high efficient heat exchanging stove (8), described efficiently
The gas outlet of recuperative furnace (8) is connected with disposable dust remover (9), the gas outlet of described disposable dust remover (9) and flue gas mixing arrangement
(10) being connected, the sintering flue gas of described second exhaust pass (3) is connected, at described cigarette with the air inlet of flue gas mixing arrangement (10)
The gas outlet of gas mixing arrangement (10) connects the SCR reactor (11) having for sintering flue gas carries out denitration reaction, described SCR
The gas outlet of reactor (11) connects has one for sintering the waste heat boiler (12) of flue gas heat exchange cooling, described waste heat boiler (12)
Steam (vapor) outlet and an electromotor (13) be connected generate electricity.
A kind of sintering mine sensible heat the most according to claim 1 reclaims flue gas denitrification system simultaneously, it is characterised in that: described
It is respectively arranged with gas baffle door on the gas outlet of the main exhauster (5) of the first exhaust pass (2) and the second exhaust pass (3)
(6).
A kind of sintering mine sensible heat the most according to claim 1 and 2 reclaims flue gas denitrification system simultaneously, it is characterised in that:
It is provided with on described first exhaust pass (2) and the second exhaust pass (3) for pipeline being switched to when equipment needs maintenance
The bypass gas baffle door (23) that bypass runs.
4. the implementation method of flue gas denitrification system while that a sintering mine sensible heat reclaiming, it is characterised in that: described method is for by burning
Knot machine two-way sintering flue gas out is after cleaner unit, and a road sintering flue gas changes with sintering machine high temperature sintering ore deposit out
Heat heats up and mixes with the sintering flue gas on another road, and temperature enters SCR reactor after reaching the window temperature of denitration reaction,
Carrying out catalytic reduction reaction in SCR reactor, the nitrogen oxides completing to sinter in flue gas is removed, and goes the burning after denitrification
Knot flue gas enters back into waste heat boiler and carries out flue gas heat recovery.
A kind of sintering mine sensible heat the most according to claim 4 reclaims the implementation method of flue gas denitrification system simultaneously, its feature
It is: the temperature in described high temperature sintering ore deposit is 600 DEG C 1000 DEG C.
A kind of sintering mine sensible heat the most according to claim 4 reclaims the implementation method of flue gas denitrification system simultaneously, its feature
Be: by sintering machine out two-way sintering flue-gas temperature be 100 DEG C 190 DEG C.
A kind of sintering mine sensible heat the most according to claim 4 reclaims the implementation method of flue gas denitrification system simultaneously, its feature
It is: be 450 DEG C 650 DEG C with the sintering flue-gas temperature after the heat exchange of high temperature sintering ore deposit.
A kind of sintering mine sensible heat the most according to claim 4 reclaims the implementation method of flue gas denitrification system simultaneously, its feature
It is: the mixed window temperature of two-way flue gas is 200 DEG C 400 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610857798.0A CN106257141A (en) | 2016-09-28 | 2016-09-28 | A kind of sintering mine sensible heat reclaims flue gas denitrification system and its implementation simultaneously |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610857798.0A CN106257141A (en) | 2016-09-28 | 2016-09-28 | A kind of sintering mine sensible heat reclaims flue gas denitrification system and its implementation simultaneously |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269309A (en) * | 2018-08-24 | 2019-01-25 | 钢研晟华科技股份有限公司 | Sintering mine sensible heat and flue gas waste heat recovery and gas cleaning integral system and method |
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| JP2001124322A (en) * | 1999-10-25 | 2001-05-11 | Kawasaki Heavy Ind Ltd | Method and device for combusting waste solid fuel |
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| CN105688667A (en) * | 2016-01-22 | 2016-06-22 | 钢研晟华工程技术有限公司 | Method for carrying out denitration on sintering flue gas by utilizing sensible heat of blast furnace slag |
| CN206145705U (en) * | 2016-09-28 | 2017-05-03 | 江苏垦乐节能环保科技有限公司 | Sintering deposit sensible heat recovery is flue gas denitration system simultaneously |
-
2016
- 2016-09-28 CN CN201610857798.0A patent/CN106257141A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001124322A (en) * | 1999-10-25 | 2001-05-11 | Kawasaki Heavy Ind Ltd | Method and device for combusting waste solid fuel |
| CN102997697A (en) * | 2012-12-12 | 2013-03-27 | 武汉钢铁(集团)公司 | Sinter waste-heat utilization process based on purification of sintering flue gas |
| CN103954139A (en) * | 2014-04-03 | 2014-07-30 | 上海交通大学 | Sintering complementary energy power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109269309A (en) * | 2018-08-24 | 2019-01-25 | 钢研晟华科技股份有限公司 | Sintering mine sensible heat and flue gas waste heat recovery and gas cleaning integral system and method |
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Application publication date: 20161228 |