CN109381990A - A kind of steel sintering flue gas denitrification system and the method for denitration using system progress - Google Patents
A kind of steel sintering flue gas denitrification system and the method for denitration using system progress Download PDFInfo
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- CN109381990A CN109381990A CN201811207582.5A CN201811207582A CN109381990A CN 109381990 A CN109381990 A CN 109381990A CN 201811207582 A CN201811207582 A CN 201811207582A CN 109381990 A CN109381990 A CN 109381990A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The present invention relates to atmosphere pollution Treatment process fields, disclose a kind of steel sintering flue gas denitrification system and the method for denitration using system progress, sintering flue gas after dedusting, desulfurization initially enters flue gas heat-exchange unit preheating, it then passes through coke oven gas burner burning coke-stove gas and improves flue-gas temperature, reducing agent is sprayed by reducing agent injection apparatus again, after mixing, into Benitration reactor, under low-temperature SCR catalyst effect, NOx and NH in flue gas3Reaction generates N2And H2O is disposed with flue gas heat-exchange unit on denitration exhaust pass to achieve the purpose that denitration, utilizes waste-heat inlet flue gas.The present invention improves sintering flue gas temperature to catalyst optimum temperature section using rotary flue gas heat-exchange unit and coke-stove gas burning, nitrogen oxides in effluent concentration is reduced using low temperature SCR denitration technology, a kind of low energy consumption, efficient sintering flue gas denitration technology scheme are provided.
Description
Technical field
The present invention relates to a kind of steel sintering flue gas denitrification system and the method for denitration carried out using the system, can effectively drop
The content of NOx in low frit flue gas realizes the cleaning discharge of flue gas, belongs to atmosphere pollution Treatment process field.
Background technique
Steel industry is one of most important basic industries in China, while making significant contribution for economic development,
Bring serious atmosphere polluting problem.Nitrogen oxides is one of the Air Pollutants that iron and steel enterprise is discharged, wherein steel
NOx caused by iron sintering process accounts for about the 50% of full factory's total release, and sintering flue gas is the maximum generating source of iron and steel enterprise NOx,
It is the emphasis of iron and steel enterprise's NOx emission control.NOx concentration is generally 200~500 mg/Nm in sintering flue gas3, wherein fuel type
NO accounts for 90% or more of NOx total amount.
" steel sintering, the pelletizing industrial air pollution object discharge standard " of issuing and implementation in 2012 is wanted for priority control area
Seek flue gas pollutant emission limit are as follows: SO2Concentration of emission≤180mg/Nm3, NOx emission concentration≤300mg/Nm3, particulate matter row
Put concentration≤40mg/Nm3.As prevention and control of air pollution dynamics persistently increases, and domestic flue gas desulfurization and denitrification technology water at present
Flat raising, State Ministry of Environmental Protection further control as strict as possible and have brought into schedule to steel sintering, pelletizing discharge of industrial wastes.2017, state
Chinese Ministry of Environmental Protection, family successively issue " bulletin of the special emission limit of atmosphere pollution is executed about Jing-jin-ji region and surrounding area " (is solicited
Opinion original text) and " about publication<steel sintering, pelletizing industrial air pollution object discharge standard>etc. 20 National Pollutant Discharges
The bulletin of standard modification list " (exposure draft), bulletin proposition: increasing the requirement of sintering flue gas benchmark oxygen content, while modifying big
The special emission limit of gas pollutant, i.e. SO2Limit value is adjusted to 50mg/Nm3, NOx limit value is adjusted to 100mg/Nm3, particulate matter limit value
It is adjusted to 20mg/Nm3。
Each steel production enterprise is mainly adjusted by the means of fuel ratio, sintering process control before, can reach substantially
It is no more than 300mg/Nm to NOx3Limit value requirement.Therefore, before the bulletin publication for further decreasing limitation, really implement sintering
The 2% of the total number of units of sintering machine deficiency of flue gas end denitration, after the implementation of standard revision version, most existing manufacturing enterprises are needed
Add sintering flue gas denitrification apparatus.
Sintering flue gas denitration technology is mainly activated coke absorption at present.Active coke absorption method denitration efficiency about 50%~70%,
Construction cost and operating cost are high, are suitable for grassroot project, carry out collaboration processing to desulphurization denitration, however big portion absolutely domestic at present
Divide the configured flue gas desulfurization device of sintering machine, it may appear that repeated construction problem.And the SCR denitration skill that power industry application is mature
Art, flue-gas temperature needed for reacting are generally 300~450 DEG C, and 100~180 DEG C of sintering flue gas temperature, by flue gas after desulfurization temperature
60~100 DEG C are further reduced to, flue gas needs first to be warming up to catalyst optimum temperature section, and energy consumption is high, and operating cost is high.Cause
This is reduced it is an object of the present invention to develop the sintering flue gas denitration technology of a kind of high efficiency suitable for iron and steel enterprise, low energy consumption
Discharged nitrous oxides reduce the harm to environment.
Summary of the invention
The purpose of the present invention is to provide a kind of steel sintering flue gas denitrification system and the denitration sides carried out using the system
Method solves existing activated coke absorption construction cost and operating cost height, for most of item for being configured flue gas desulfurization device
Mesh causes the problem of repeated construction and middling temperature DeNOx technology flue gas to need first to be warming up to catalyst optimum temperature section, energy
The technical problem that consumption is big, operating cost is high.
To realize the above-mentioned technical purpose, technical scheme is as follows:
A kind of steel sintering flue gas denitrification system is set to after dust pelletizing system and desulphurization system, it is characterised in that: enter including denitration
Mouth flue, Benitration reactor and denitration exhaust pass；Low-temperature SCR catalyst is set in the Benitration reactor；The denitration entrance
Flue is connected to the smoke inlet end of Benitration reactor, is disposed with burner and reducing agent injection dress along flue gas flow direction thereon
It sets；The denitration exhaust pass is connected to the smoke outlet of Benitration reactor, and tail portion is connected to chimney；The denitration entrance
The sections of flue and denitration exhaust pass set flue gas heat-exchange unit, realize high-temperature flue gas and denitration entrance in denitration exhaust pass
The heat exchange of low-temperature flue gas in flue.
As the preferred technical solution of the present invention, the burner is premixed flame burner, and burner fuel is using burnt
Producer gas, combustion air use sintering flue gas, and quantity is 1~10.
It is further preferred that the flue-gas temperature of denitration gas approach inlet is 60~100 DEG C, by flue gas heat exchange
Device is tentatively preheated to 160~170 DEG C.
It is further preferred that flue gas is warming up to the optimum activity temperature of low-temperature SCR catalyst by the burner, it is 180
~200 DEG C.
It is further preferred that the flue gas heat-exchange unit is rotary type heat exchanger.
It is furthermore preferred that the low-temperature SCR catalyst is one or more layers cellular, flat or corrugated plate dst catalyst,
The top of the low-temperature SCR catalyst is equipped with soot blower.
In addition, the present invention also provides a kind of steel sintering denitration method for flue gas carried out using above system, feature exists
In including the following steps:
Firstly, the sintering flue gas after semi-dry desulphurization enters denitration gas approach, flue-gas temperature is 60~100 DEG C, is passed through
Flue gas heat-exchange unit carries out tentatively being preheated to 160~170 DEG C；
Secondly, the sintering flue gas after preliminary preheating enters burner, using coke-stove gas as fuel, with the sintering flue gas of rich oxygen content
To assist hot wind, sintering flue gas is further heated to 180~200 DEG C by the burning of coke-stove gas；
Again, sintering flue gas is uniformly mixed with the reducing agent that reducing agent injection apparatus sprays into, into Benitration reactor, in low temperature
Under SCR catalyst effect, NOx and NH in flue gas3Reaction generates N2And H2O is carried out out of stock；
Then, the sintering flue gas after denitration enters denitration exhaust pass, and by flue gas heat-exchange unit, waste heat is passed to denitration entrance
Sintering flue gas in flue；
Finally, the sintering flue gas after denitration and cooling is through smoke stack emission into atmosphere.
The present invention preheats sintering flue gas using flue gas heat-exchange unit, and it is low-temperature catalyzed to SCR to be passed through coke-stove gas heating by ignition
Agent optimum activity temperature range, the reducing agent of flue gas and penetrating after heating after evenly mixing, into Benitration reactor, are being catalyzed
NOx and NH under the action of agent, in flue gas3Reaction generates N2And H2O, to reach removing nitrogen oxides purpose.With existing skill
Art is compared, and the present invention has the advantage that
1, applied widely: the present invention is suitable for grassroot project, is also applied for the accessories rebuilding of the existing sulfur removal technology of iron and steel enterprise,
Denitrification apparatus need to be only built after desulfurization, matched with former sintering flue gas environment-friendly disposal system；
2, safety and stability: after denitrification apparatus of the present invention is arranged in dedusting, desulfurizer, heavy metal in flue gas, ash content, SO2
Concentration is low, is conducive to the safe and stable operation of catalyst；
3, at low cost: the present invention improves flue-gas temperature to low temperature catalyst optimum activity using fume afterheat and coke-stove gas burning
Temperature range makes full use of steel mill's existence conditions, and using coke-stove gas as fuel, sintering flue gas (oxygen content about 16%) is auxiliary heat
Invisible waste can lack, and operating cost is low；
4, denitration efficiency is high: as steel industry environmental protection policy gradually tends to strictly, the following emission limits of nitrogen oxides may be into
One step reduces, and it is perspective to have environmental protection up to 90% or more for denitration efficiency of the present invention.
Detailed description of the invention
By made detailed description in conjunction with the following drawings, above-mentioned and/or other aspects of the invention and advantage will become
It becomes apparent from and is easier to understand, these attached drawings are only schematical, are not intended to limit the present invention, in which:
Fig. 1 is the schematic diagram of steel sintering flue gas denitrification system of the present invention.
Appended drawing reference: 1- flue gas heat-exchange unit；2- burner；3- reducing agent injection apparatus；4- low-temperature SCR catalyst；5- is de-
Nitre gas approach；6- Benitration reactor；7- denitration exhaust pass；8- chimney.
Specific embodiment
Hereinafter, steel sintering flue gas denitrification system of the invention is described with reference to the accompanying drawings and utilizes system progress
The embodiment of method of denitration.The embodiment recorded herein is specific specific embodiment of the invention, for illustrating the present invention
Design, be it is explanatory and illustrative, should not be construed as the limitation to embodiment of the present invention and the scope of the invention.Except
Outside this embodiment recorded, those skilled in the art can also be based on the claim of this application book and specification disclosure of that
Using obvious other technical solutions, these technical solutions include using any aobvious to making for the embodiment recorded herein
And the technical solution for the substitutions and modifications being clear to.The attached drawing of this specification is schematic diagram, aids in illustrating design of the invention, is illustrated
Indicate to property the shape and its correlation of each section.It note that for the ease of clearly showing each of the embodiment of the present invention
The structure of component is not drawn according to identical ratio between each attached drawing.Identical reference marker is for indicating identical part.
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.As shown in Figure 1, steel sintering flue gas denitrification system of the invention, be set to dust pelletizing system and
After desulphurization system, including denitration gas approach 5, Benitration reactor 6 and denitration exhaust pass 7；Low temperature is set in Benitration reactor 6
SCR catalyst 4；Denitration gas approach 5 is connected to the smoke inlet end of Benitration reactor 6, sets gradually thereon along flue gas flow direction
There are burner 2 and reducing agent injection apparatus 3；Denitration exhaust pass 7 is connected to the smoke outlet of Benitration reactor 6, tail portion
It is connected to chimney 8；The sections of denitration gas approach 5 and denitration exhaust pass 7 set flue gas heat-exchange unit 1, realize denitration outlet
High-temperature flue gas is exchanged with the heat of low-temperature flue gas in denitration gas approach 5 in flue 7.
Wherein, burner 2 is premixed flame burner, and burner fuel uses coke-stove gas, and combustion air is using sintering cigarette
Gas, quantity can be 1~10.The flue-gas temperature of 5 inlet of denitration gas approach is 60~100 DEG C, by flue gas heat exchange
Device 1 is tentatively preheated to 160~170 DEG C.Flue gas is warming up to the optimum activity temperature of low-temperature SCR catalyst 4 by burner 2, is 180
~200 DEG C.Flue gas heat-exchange unit 1 is rotary type heat exchanger.Low-temperature SCR catalyst 4 be one or more layers it is cellular, flat or
The top of corrugated plate dst catalyst, low-temperature SCR catalyst 4 is equipped with soot blower.
After denitrification apparatus of the invention is arranged in dedusting, desulfurizer, sintering flue gas after desulfurization is from denitration entrance
Flue 5 enters, and flue-gas temperature is about 60~100 DEG C, is tentatively preheated to 160~170 DEG C by flue gas heat-exchange unit 1；Flue gas heat exchange
Device (1) is rotary type heat exchanger, and the high-temperature flue gas for making full use of Benitration reactor to export carries out heat transfer to low-temperature sintering flue gas and rises
Temperature, Mist heat recovering reduce energy consumption；Sintering flue gas after GGH is tentatively preheated enters heating by ignition section, in denitration entrance
Several coke oven gas burners of arrangement in flue 5, are burnt by coke-stove gas flue gas being warming up to the best of low-temperature SCR catalyst
Active temperature (180~200 DEG C)；Burner fuel selects the higher coke-stove gas of calorific value in steel plant, with the burning of rich oxygen content
Tying flue gas is auxiliary hot wind, and burner uses premixed flame burner, improves efficiency of combustion, reduces CO production quantity；After heating
Sintering flue gas flows through reducing agent injection apparatus 3, after evenly mixing with reducing agent, into Benitration reactor 6, in the effect of catalyst
Under, NH3It is reacted with the NOx in flue gas, is converted into N2And H2O realizes the purpose of denitration；High-temperature flue gas by denitration is again
It is secondary to enter GGH heat-exchanger rig, denitration exiting flue gas waste heat is recycled, for heating denitration inlet flue gas, enters smoke stack emission later.
Such as, with certain 400m2For sintering machine, in conjunction with attached drawing to specific structure of the invention, working principle and the course of work
It is further described.
A kind of steel sintering flue gas denitrification system of the invention, including flue gas heat-exchange unit 1, coke oven gas burner 2, reduction
Agent injection apparatus 3, low-temperature SCR catalyst 4 etc..
80 DEG C of sintering flue gas temperature after semi-dry desulphurization, NOx concentration 500mg/Nm3, initially enter flue gas and change
Hot device 1 is preheated to 160 DEG C.Flue gas heat-exchange unit 1 uses rotary type heat exchanger, the high-temperature flue gas for making full use of Benitration reactor to export
Heat transfer heating is carried out to low-temperature sintering flue gas.
4 premix burners are arranged in denitration gas approach 5, using coke-stove gas as fuel, with the sintering flue gas of rich oxygen content
To assist hot wind, the flue gas after preheating is further heated to 200 DEG C by the burning of coke-stove gas.
Subsequent flue gas is uniformly mixed with the reducing agent that reducing agent injection apparatus 3 sprays into, into Benitration reactor 6, in low temperature
Under SCR catalyst 4 acts on, NOx and NH in flue gas3Reaction generates N2And H2O, denitration efficiency reach 80%, exit NOx concentration
100mg/Nm3。
About 195 DEG C of denitration exiting flue gas, by flue gas heat-exchange unit 1, waste-heat inlet flue gas is made full use of, most afterwards through cigarette
Chimney is discharged into atmosphere.
The foregoing is merely a prefered embodiment of the invention, is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of steel sintering flue gas denitrification system is set to after dust pelletizing system and desulphurization system, it is characterised in that: including denitration
Gas approach (5), Benitration reactor (6) and denitration exhaust pass (7)；Low-temperature SCR catalyst is set in the Benitration reactor (6)
(4)；The denitration gas approach (5) is connected to the smoke inlet end of Benitration reactor (6), sets gradually thereon along flue gas flow direction
There are burner (2) and reducing agent injection apparatus (3)；The flue gas that the denitration exhaust pass (7) is connected to Benitration reactor (6) goes out
Mouth end, tail portion is connected to chimney (8)；The sections of the denitration gas approach (5) and denitration exhaust pass (7) set flue gas
Heat exchanger (1) realizes that denitration exhaust pass (7) interior high-temperature flue gas is exchanged with the heat of denitration gas approach (5) interior low-temperature flue gas.
2. steel sintering flue gas denitrification system according to claim 1, it is characterised in that: the burner (2) is premix
Flame burner, burner fuel use coke-stove gas, and combustion air uses sintering flue gas, and quantity is 1~10.
3. steel sintering flue gas denitrification system according to claim 1, it is characterised in that: the denitration gas approach (5)
The flue-gas temperature of inlet is 60~100 DEG C, is tentatively preheated to 160~170 DEG C by flue gas heat-exchange unit (1).
4. steel sintering flue gas denitrification system according to claim 1, it is characterised in that: the burner (2) is by flue gas
It is warming up to the optimum activity temperature of low-temperature SCR catalyst (4), is 180~200 DEG C.
5. steel sintering flue gas denitrification system according to claim 1, it is characterised in that: the flue gas heat-exchange unit (1) is
Rotary type heat exchanger.
6. according to steel sintering flue gas denitrification system described in 1~5 any one of right, it is characterised in that: the low-temperature SCR is urged
Agent (4) is one or more layers cellular, flat or corrugated plate dst catalyst, is set above the low-temperature SCR catalyst (4)
There is soot blower.
7. a kind of steel sintering denitration method for flue gas carried out using system described in claim 1~6 any one, feature
It is, includes the following steps:
Firstly, the sintering flue gas after semi-dry desulphurization enters denitration gas approach (5), flue-gas temperature is 60~100 DEG C, warp
Flue gas heat-exchange unit (1) is crossed to carry out tentatively being preheated to 160~170 DEG C；
Secondly, the sintering flue gas after preliminary preheating enters burner (2), using coke-stove gas as fuel, with the sintering of rich oxygen content
Flue gas is auxiliary hot wind, and sintering flue gas is further heated to 180~200 DEG C by the burning of coke-stove gas；
Again, sintering flue gas is uniformly mixed with the reducing agent that reducing agent injection apparatus (3) sprays into, into Benitration reactor (6),
Under low-temperature SCR catalyst (4) effect, NOx and NH in flue gas3Reaction generates N2And H2O is carried out out of stock；
Then, the sintering flue gas after denitration enters denitration exhaust pass (7), by flue gas heat-exchange unit (1), waste heat is passed to de-
Sintering flue gas in nitre gas approach (5)；
Finally, the sintering flue gas after denitration and cooling is discharged into atmosphere through chimney (8).
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| CN201811207582.5A CN109381990A (en) | 2018-10-17 | 2018-10-17 | A kind of steel sintering flue gas denitrification system and the method for denitration using system progress |
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| CN201811207582.5A CN109381990A (en) | 2018-10-17 | 2018-10-17 | A kind of steel sintering flue gas denitrification system and the method for denitration using system progress |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404403A (en) * | 2019-08-08 | 2019-11-05 | 上海灿州环境工程有限公司 | SCR reactor and production technology |
| CN110420558A (en) * | 2019-08-27 | 2019-11-08 | 东方电气集团东方锅炉股份有限公司 | A kind of denitrating system for grate-kiln pelletizing equipment |
| CN110585900A (en) * | 2019-08-13 | 2019-12-20 | 中国平煤神马能源化工集团有限责任公司 | Coke oven flue gas denitration and waste heat utilization combined device and method for denitration by using same |
| CN111036072A (en) * | 2019-12-13 | 2020-04-21 | 西安润川环保科技有限公司 | Flue gas treatment system |
| CN111467961A (en) * | 2019-05-31 | 2020-07-31 | 中国科学院过程工程研究所 | SCR denitration catalyst in-situ regeneration system and regeneration method |
| CN111974207A (en) * | 2019-05-23 | 2020-11-24 | 同正环保集团有限公司 | Low-temperature SCR denitration process for flue gas |
| CN112044400A (en) * | 2020-09-16 | 2020-12-08 | 安徽工业大学 | Mixed steel slag coal-based columnar forming active coke for low-temperature flue gas denitration and preparation method thereof |
| CN112044268A (en) * | 2019-06-05 | 2020-12-08 | 中冶长天国际工程有限责任公司 | Method and system for utilizing heat energy in flue gas treatment |
| CN112304102A (en) * | 2020-09-07 | 2021-02-02 | 柳州钢铁股份有限公司 | Method and device for recycling CO in sintering pellet waste gas |
| WO2021088524A1 (en) * | 2019-11-06 | 2021-05-14 | 中冶长天国际工程有限责任公司 | System and method for denitration of flue gas by carbon monoxide |
| CN114570202A (en) * | 2020-11-30 | 2022-06-03 | 河北林格环保科技有限公司 | Flue gas denitration system and flue gas denitration method |
| CN115430273A (en) * | 2022-09-19 | 2022-12-06 | 铜陵有色设计研究院有限责任公司 | Denitration system and method for treating flue gas of Kaldo furnace |
| CN117839428A (en) * | 2024-03-08 | 2024-04-09 | 北京中航泰达环保科技股份有限公司 | Energy-saving flue gas denitration system |
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| CN103785290A (en) * | 2014-03-03 | 2014-05-14 | 中钢集团天澄环保科技股份有限公司 | Sintering and pelletizing flue gas desulfurization and denitrification coordinating management system and process |
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| CN103785290A (en) * | 2014-03-03 | 2014-05-14 | 中钢集团天澄环保科技股份有限公司 | Sintering and pelletizing flue gas desulfurization and denitrification coordinating management system and process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111974207A (en) * | 2019-05-23 | 2020-11-24 | 同正环保集团有限公司 | Low-temperature SCR denitration process for flue gas |
| CN111467961A (en) * | 2019-05-31 | 2020-07-31 | 中国科学院过程工程研究所 | SCR denitration catalyst in-situ regeneration system and regeneration method |
| CN111467961B (en) * | 2019-05-31 | 2021-08-17 | 中国科学院过程工程研究所 | SCR denitration catalyst in-situ regeneration system and regeneration method |
| CN112044268A (en) * | 2019-06-05 | 2020-12-08 | 中冶长天国际工程有限责任公司 | Method and system for utilizing heat energy in flue gas treatment |
| CN110404403A (en) * | 2019-08-08 | 2019-11-05 | 上海灿州环境工程有限公司 | SCR reactor and production technology |
| CN110585900A (en) * | 2019-08-13 | 2019-12-20 | 中国平煤神马能源化工集团有限责任公司 | Coke oven flue gas denitration and waste heat utilization combined device and method for denitration by using same |
| CN110420558A (en) * | 2019-08-27 | 2019-11-08 | 东方电气集团东方锅炉股份有限公司 | A kind of denitrating system for grate-kiln pelletizing equipment |
| WO2021088524A1 (en) * | 2019-11-06 | 2021-05-14 | 中冶长天国际工程有限责任公司 | System and method for denitration of flue gas by carbon monoxide |
| CN111036072A (en) * | 2019-12-13 | 2020-04-21 | 西安润川环保科技有限公司 | Flue gas treatment system |
| CN112304102A (en) * | 2020-09-07 | 2021-02-02 | 柳州钢铁股份有限公司 | Method and device for recycling CO in sintering pellet waste gas |
| CN112044400A (en) * | 2020-09-16 | 2020-12-08 | 安徽工业大学 | Mixed steel slag coal-based columnar forming active coke for low-temperature flue gas denitration and preparation method thereof |
| CN114570202A (en) * | 2020-11-30 | 2022-06-03 | 河北林格环保科技有限公司 | Flue gas denitration system and flue gas denitration method |
| CN115430273A (en) * | 2022-09-19 | 2022-12-06 | 铜陵有色设计研究院有限责任公司 | Denitration system and method for treating flue gas of Kaldo furnace |
| CN117839428A (en) * | 2024-03-08 | 2024-04-09 | 北京中航泰达环保科技股份有限公司 | Energy-saving flue gas denitration system |
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