CN109883208A - A kind of sinter is cooling and sintering flue gas cogeneration desulfurization and denitrification integral system - Google Patents
A kind of sinter is cooling and sintering flue gas cogeneration desulfurization and denitrification integral system Download PDFInfo
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- CN109883208A CN109883208A CN201711272545.8A CN201711272545A CN109883208A CN 109883208 A CN109883208 A CN 109883208A CN 201711272545 A CN201711272545 A CN 201711272545A CN 109883208 A CN109883208 A CN 109883208A
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- flue gas
- sintering
- temperature
- desulfurization
- sinter
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- 239000003546 flue gas Substances 0.000 title claims abstract description 77
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 238000005245 sintering Methods 0.000 title claims abstract description 59
- 238000001816 cooling Methods 0.000 title claims abstract description 32
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 27
- 230000023556 desulfurization Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 52
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 11
- 239000002918 waste heat Substances 0.000 claims abstract description 11
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 239000012716 precipitator Substances 0.000 claims abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 18
- 229910021529 ammonia Inorganic materials 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 235000019738 Limestone Nutrition 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000000908 ammonium hydroxide Substances 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 claims description 3
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 238000001694 spray drying Methods 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims description 2
- 239000002737 fuel gas Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000035611 feeding Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 235000020985 whole grains Nutrition 0.000 description 1
Classifications
-
- 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
Abstract
A kind of sinter is cooling and sintering flue gas cogeneration desulfurization and denitrification integral system, is related to that sinter is cooling and sintering Exposure degree technology.The present invention includes sintering machine and sequentially connected erects cold kiln, multi-tube dust cleaner two, SCR denitration reaction device, waste heat boiler, air-introduced machine and desulfurizing tower.It sintering machine and erects to set up between cold kiln and is equipped with the oblique hoist engine of trolley.The high-temperature steam outlet of waste heat boiler is connected to generating set.Separation bellows are equipped with below sintering machine, the low-temperature flue gas outlet for separating bellows, which is successively connected to through multi-tube dust cleaner one, exhaust fan one and air blower, erects cold kiln bottom portion；Its secondary low-temperature flue gas outlet is successively divided into two-way after electric precipitator and exhaust fan two, is connected to the gas outlet of multi-tube dust cleaner two all the way, another way returns to the charge level at the top of sintering machine through circulating fan.The present invention uses the closed cooling technique of sinter, improves hot blast temperature, and carry out efficient desulphurization and denitration simultaneously to sintering flue gas, realizes that the high efficiente callback of sintering mine sensible heat utilizes.
Description
Technical field
The present invention relates to the cooling of steel industry sinter and the desulphurization denitration technologies of sintering Exposure degree and sintering flue gas
The cooling of field, especially sinter and sintering flue gas cogeneration desulfurization and denitrification integral system.
Background technique
Sintering process energy consumption belongs to the second largest energy consumption process in process for producing steel and iron, accounts for about the 11%-20% of total energy consumption, only secondary
In ironmaking.In sintering process, sinter can distribute a large amount of heat, account for about the 1/3 of sintering total energy consumption, this portion of energy recycling effect
Rate is very low, and waste is huge, has very deep excavated space, carries out resource reclaim.
Currently, cooling sinter generallys use three kinds of forms: one is cooling technique on machine, on machine cooling technique be
Sintering and cooling procedure are completed on sintering machine.I.e. when being sintered end of a period, sinter is not unloaded immediately, and it is allowed to remain in burning
On knot machine, at the same time, keep sinter cooling using the cold air that cooling section blower sucks；Another kind is straight line cooler, is burnt
It is broken through overheating after knot process is completed, material is discharged on straight line cooler, air blast or exhausting are cooling；The third is that annular is cold
But machine, sinter can generate a large amount of high-temperature flue gas during cooled, and flue gas enters waste heat boiler and exchanges heat, and generate
Steam generates electricity.
Since steel industry sintering flue gas and coal-fired boiler in power plant flue gas make a big difference, so directly boiler smoke
Desulfurization and method of denitration be applied to sintering flue gas, can lead to the problem of it is very much, especially for sintering machine denitration.Due to passing
The temperature of system sintering device flue gas is too low and water capacity, oxygen content are too high, thus is difficult directly to carry out using the SCR technique of thermal power plant
Denitration.
At present during handling sintering device flue gas, the method for desulfurization mainly has semidry method (rotary spraying technique or recycle stream
Change bed process etc.) and wet fuel gas desulfurizing technology, and the method for denitration mainly has Ozonation and (the flue gas heating of high temperature SCR method
After use) etc..Operating cost is higher, especially denitration process, either ozone or flue gas heating, is both needed to using a large amount of
Resource, to cause the rising of operating cost.And dry simultaneous desulfurization/denitrification technique is studied in many concentrations of enterprises, is equally also deposited
In the high problem of cost of investment height and operating cost.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of sinter cooling and sintering cigarettes
Gas cogeneration desulfurization and denitrification integral system.It uses the closed cooling technique of sinter, improves hot blast temperature, and to sintering cigarette
Gas carries out efficient desulphurization and denitration simultaneously, realizes that the high efficiente callback of sintering mine sensible heat utilizes.
A kind of sinter is cooling and sintering flue gas cogeneration desulfurization and denitrification integral system, it includes sintering machine.It is tied
Structure feature is, it further includes sequentially connected erecting cold kiln, multi-tube dust cleaner two, SCR denitration reaction device, waste heat boiler, air-introduced machine
And desulfurizing tower.It the sintering machine and erects to set up between cold kiln and is equipped with the oblique hoist engine of trolley.The high-temperature steam of the waste heat boiler
Outlet is connected to generating set.Separation bellows are equipped with below the sintering machine, it includes low-temperature flue gas outlet and time low for separating bellows
Warm exhanst gas outlet.The low-temperature flue gas outlet, which is successively connected to through multi-tube dust cleaner one, exhaust fan one and air blower, erects cold kiln bottom
Portion.The secondary low-temperature flue gas outlet is successively divided into two-way after electric precipitator and exhaust fan two, is connected to multi-tube dust cleaner all the way
Two gas outlet, another way return to the charge level at the top of sintering machine through circulating fan.
Cooling in sintering flue gas cogeneration desulfurization and denitrification integral system in above-mentioned sinter, the sintering machine discharges
The hot mine temperature of sintering of mouth is 650 °C~750 °C.
In the cooling of above-mentioned sinter and sintering flue gas cogeneration desulfurization and denitrification integral system, in the separation bellows
Low-temperature flue gas temperature≤90 °C, secondary low-temperature flue gas temperature >=160 °C.
In the cooling of above-mentioned sinter and sintering flue gas cogeneration desulfurization and denitrification integral system, the secondary low-temperature flue gas
All the way with from the high-temperature flue gas mixture for erecting temperature >=450 °C that cold kiln is discharged be that the medium temperature flue gas that temperature is 300 ~ 400 °C gives
Enter SCR denitration reaction device.
Cooling in sintering flue gas cogeneration desulfurization and denitrification integral system in above-mentioned sinter, the SCR denitration is anti-
The reducing agent ammonia for answering device to use uses liquefied ammonia or ammonium hydroxide, urea.
Cooling in sintering flue gas cogeneration desulfurization and denitrification integral system in above-mentioned sinter, the desulfurizing tower uses
Limestone/lime-gypsum wet flue gas desulfurizing technique, or use the wet process of FGD of ammonia process, magnesium processes, sodium method, Dual alkali
The semi-dry method flue gas desulfurization technique of spray drying process, ciculation fluidized bed process is gone back or used to technique.
The present invention carries out closed cooling to sinter by using above structure, using cold kiln is erected, and solves traditional cooling
The problem that technique air leak rate of air curtain is high, maintenance is big.Meanwhile present invention combination SCR denitration and flue gas desulfurization technique, solve sintering
Denitrating flue gas problem can carry out efficient desulphurization denitration, be also effectively reduced system for desulfuration and denitration operating cost and investment at
This, the present invention also realizes the high efficiente callback for burning sensible heat.Its technology and economy is substantially better than the pre- recuperation of heat of individual sinter
Power generation, desulphurization and denitration technology, the present invention have energy conservation+environmental protection double dominant, one for having a good application prospect and promoting
The energy-saving and environment-friendly new process of kind.
Present invention will be further explained below with reference to the attached drawings and specific embodiments.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Referring to Fig. 1, sinter cooling of the present invention and sintering flue gas cogeneration desulfurization and denitrification integral system, it includes burning
Knot machine 1 and sequentially connected erect cold kiln 11, multi-tube dust cleaner 2 12, SCR denitration reaction device 13, waste heat boiler 14, air-introduced machine
16 and desulfurizing tower 17.It sintering machine 1 and erects to set up between cold kiln 11 and is equipped with the oblique hoist engine 10 of trolley 9, the burning of 1 discharge port of sintering machine
Tying hot mine temperature is 650 °C~750 °C.The high-temperature steam outlet of waste heat boiler 14 is connected to generating set 15.1 lower section of sintering machine
It is equipped with and separates bellows 2, separating bellows 2 includes low-temperature flue gas outlet and time low-temperature flue gas outlet, and low-temperature flue gas temperature≤90 °C are secondary
Low-temperature flue gas temperature >=160 °C.The low-temperature flue gas outlet successively connects through multi-tube dust cleaner 1, exhaust fan 1 and air blower 7
It is connected to and erects cold 11 bottom of kiln.The secondary low-temperature flue gas outlet is successively divided into two-way after electric precipitator 5 and exhaust fan 26, all the way
It is connected to the gas outlet of multi-tube dust cleaner 2 12, another way returns to the charge level at 1 top of sintering machine through circulating fan 8.Secondary low temperature cigarette
Gas all the way with from the high-temperature flue gas mixture for erecting temperature >=450 °C that cold kiln 11 is discharged be medium temperature cigarette that temperature is 300 ~ 400 °C
Pneumatic transmission enters SCR denitration reaction device 13.The reducing agent ammonia that SCR denitration reaction device 13 uses uses liquefied ammonia or ammonium hydroxide, urea.It is de-
Use limestone/lime-gypsum wet flue gas desulfurizing the technique of sulphur tower 17, or use ammonia process, magnesium processes, sodium method, Dual alkali are wet
The semi-dry method flue gas desulfurization technique of spray drying process, ciculation fluidized bed process is gone back or used to method flue gas desulfurization technique.
When the invention works, sintering machine 1 is sintered mixture iron ore material, the heat sinter (temperature after sintering crushing
650 °C ~ 750 °C of degree) trolley 9 is poured into, the feed hopper for erecting cold kiln 11 is promoted to by oblique hoist engine 10.Separate the temperature in bellows 2
≤ 90 °C of low-temperature flue gas successively through multi-tube dust cleaner 1, exhaust fan 1 and air blower 7, be forced into 16.5KPa feeding erect it is cold
The air inlet of 11 bottom of kiln.Heat sinter and low-temperature flue gas exchange heat erecting reverse flow in cold kiln 11, and low-temperature flue gas is added
For heat to the high-temperature flue gas of temperature >=450 °C, heat sinter is cooled to≤150 °C of feedings screening whole grains.The one of secondary low-temperature flue gas
Road returns to the charge level at 1 top of sintering machine, another way and the high temperature from temperature >=450 °C for erecting the cold discharge of kiln 11 through circulating fan 8
Flue gas mixture is that the medium temperature flue gas that temperature is 300 ~ 400 °C is sent into SCR denitration reaction device 13.Medium temperature flue gas is in SCR denitration reaction
NO in device 13, in flue gasxUnder the effect of the catalyst be sufficiently mixed after reducing agent NH3Gas reacts, and removes in flue gas
NOx, generate N2Gas and H2O.Flue gas (00 ~ 400 °C of temperature) after denitration, is sufficiently changed into waste heat boiler 14 with demineralized water
Heat, temperature are down to≤160 °C, while generating steam and being sent into the power generation of generating set 15.By the flue gas after cooling of waste heat boiler 14 (temperature
≤ 160 °C of degree), it is sent into desulfurizing tower 17 through air-introduced machine 16, the SO in flue gas2It is come into full contact with the alkaline desulfurizing agent in desulfurizing tower 17
Reaction removes the SO in flue gas2, by desulfurization, the discharge of 17 exhaust outlets after flue gas is up to standard.
Claims (6)
1. a kind of sinter cooling and sintering flue gas cogeneration desulfurization and denitrification integral system, it includes sintering machine (1), special
Sign is, it further includes sequentially connected erecting cold kiln (11), multi-tube dust cleaner two (12), SCR denitration reaction device (13), waste heat pot
Furnace (14), air-introduced machine (16) and desulfurizing tower (17), the sintering machine (1) and erect between cold kiln (11) set up be equipped with trolley (9)
Oblique hoist engine (10), the high-temperature steam outlet of the waste heat boiler (14) is connected to generating set (15), under the sintering machine (1)
Side, which is equipped with, separates bellows (2), and separating bellows (2) includes low-temperature flue gas outlet and time low-temperature flue gas outlet, and the low-temperature flue gas goes out
Mouth, which is successively connected to through multi-tube dust cleaner one (3), exhaust fan one (4) and air blower (7), erects cold kiln (11) bottom, the secondary low temperature
Exhanst gas outlet is successively divided into two-way after electric precipitator (5) and exhaust fan two (6), is connected to multi-tube dust cleaner two (12) all the way
Gas outlet, another way return to the charge level at the top of sintering machine (1) through circulating fan (8).
2. sinter cooling described in accordance with the claim 1 and sintering flue gas cogeneration desulfurization and denitrification integral system, special
Sign is that the hot mine temperature of sintering of sintering machine (1) discharge port is 650 °C~750 °C.
3. sinter cooling according to claim 1 or 2 and sintering flue gas cogeneration desulfurization and denitrification integral system,
It is characterized in that, low-temperature flue gas temperature≤90 °C separated in bellows (2), secondary low-temperature flue gas temperature >=160 °C.
4. sinter cooling described in accordance with the claim 3 and sintering flue gas cogeneration desulfurization and denitrification integral system, special
Sign is that the secondary low-temperature flue gas is all the way temperature with the high-temperature flue gas mixture from temperature >=450 °C for erecting cold kiln (11) discharge
Degree is sent into SCR denitration reaction device (13) for 300 ~ 400 °C of medium temperature flue gas.
5. sinter cooling and sintering flue gas cogeneration desulfurization and denitrification integral system according to claim 4, special
Sign is that the reducing agent ammonia that the SCR denitration reaction device (13) uses uses liquefied ammonia or ammonium hydroxide, urea.
6. sinter cooling and sintering flue gas cogeneration desulfurization and denitrification integral system according to claim 5, special
Sign is, the desulfurizing tower (17) uses limestone/lime-gypsum wet flue gas desulfurizing technique, or using ammonia process, magnesium processes,
The wet fuel gas desulfurizing technology of sodium method, Dual alkali, it is also or de- using the semidry method flue gas of spray drying process, ciculation fluidized bed process
Sulphur technique.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272545.8A CN109883208A (en) | 2017-12-06 | 2017-12-06 | A kind of sinter is cooling and sintering flue gas cogeneration desulfurization and denitrification integral system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711272545.8A CN109883208A (en) | 2017-12-06 | 2017-12-06 | A kind of sinter is cooling and sintering flue gas cogeneration desulfurization and denitrification integral system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109883208A true CN109883208A (en) | 2019-06-14 |
Family
ID=66923137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201711272545.8A Pending CN109883208A (en) | 2017-12-06 | 2017-12-06 | A kind of sinter is cooling and sintering flue gas cogeneration desulfurization and denitrification integral system |
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|---|---|---|---|---|
| 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 |
| CN106215695A (en) * | 2016-09-28 | 2016-12-14 | 江苏垦乐节能环保科技有限公司 | A kind of sinter the out of stock system of flue gas simultaneous desulfurization and its implementation |
| CN106996702A (en) * | 2017-04-17 | 2017-08-01 | 钢研晟华工程技术有限公司 | A kind of agglomeration for iron mine flue gas segmentation enrichment and UTILIZATION OF VESIDUAL HEAT IN emission reduction SOxAnd NOxMethod |
| CN107131770A (en) * | 2017-04-17 | 2017-09-05 | 钢研晟华工程技术有限公司 | A kind of agglomeration for iron mine waste heat recovery collaboration emission reduction SOXAnd NOXMethod |
| CN207600229U (en) * | 2017-12-06 | 2018-07-10 | 同方环境股份有限公司 | A kind of sinter cooling and sintering flue gas cogeneration denitration integrated device |
-
2017
- 2017-12-06 CN CN201711272545.8A patent/CN109883208A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106215695A (en) * | 2016-09-28 | 2016-12-14 | 江苏垦乐节能环保科技有限公司 | A kind of sinter the out of stock system of flue gas simultaneous desulfurization and its implementation |
| CN106996702A (en) * | 2017-04-17 | 2017-08-01 | 钢研晟华工程技术有限公司 | A kind of agglomeration for iron mine flue gas segmentation enrichment and UTILIZATION OF VESIDUAL HEAT IN emission reduction SOxAnd NOxMethod |
| CN107131770A (en) * | 2017-04-17 | 2017-09-05 | 钢研晟华工程技术有限公司 | A kind of agglomeration for iron mine waste heat recovery collaboration emission reduction SOXAnd NOXMethod |
| CN207600229U (en) * | 2017-12-06 | 2018-07-10 | 同方环境股份有限公司 | A kind of sinter cooling and sintering flue gas cogeneration denitration integrated device |
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