CN109745855A - A kind of sintering flue gas SOX、NOXJoint emission-reducing system - Google Patents
A kind of sintering flue gas SOX、NOXJoint emission-reducing system Download PDFInfo
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Abstract
The invention discloses a kind of sintering flue gas SOX、NOxJoint emission-reducing system, belong to fume treatment technical field.The present invention includes flue collector, the first deduster, desulfurizing tower, SCR denitration unit and chimney；Honeycomb catalyst module is filled in the SCR denitration unit, which contains Ce-Mn/TiO2Catalyst, Ce-Mn/TiO2Catalyst is made of the carrier of denitration activity component and active component, and wherein denitration activity component includes cerium oxide, Mn oxide and ru oxide, and the carrier of active component is titanium dioxide.Joint emission-reducing system of the invention is first to the SO in sintering flue gasXIt is removed, is then realized under 80~120 DEG C of ultralow temperature to sintering flue gas NOxGood removing, and have the advantages that simple structure and reasonable design, easily fabricated, provide new thinking and technical support for the denitration of a large amount of low temperature of steel industry, aqueous, sulfur-bearing, dust-laden complexity flue gas.
Description
Technical field
The invention belongs to fume treatment technical fields, more specifically to a kind of sintering flue gas SOX、NOxCombine and subtract
Heat-extraction system.
Background technique
Steel industry is the pillar industry and basic industry of Chinese national economy, but steel industry belongs to high energy again
Consumption, high pollution industry.NOxIt is one of the primary pollution source of steel mill's atmosphere pollution, sintering machine NOxDischarge amount accounts for about the total NO of steel plantx
The 50%-60% of discharge amount is steel mill NOxDischarge formant.NOxIt can cause acid rain and photochemical pollution, destroy smelly
Oxygen layer seriously destroys ecological environment, jeopardizes the health of the mankind.Therefore, it in order to which steel industry realizes minimum discharge as early as possible, reduces
Steel mill NOxDischarge, it is imperative.
Currently, the selective non-catalytic that the method that sintering flue gas denitration technology mainly uses uses when being 800 DEG C -1000 DEG C
Reduction method (SNCR), 280 DEG C -420 DEG C medium temperature selective catalytic reductions (SCR) used and 150 DEG C -200 DEG C and with
Upper temperature uses and requires the low-temperature SCR of low sulfur dioxide concentration, but because of sintering flue gas low temperature and containing sulfur dioxide etc.
Characteristic, it is difficult to the above-mentioned technology of directly transplanting.Sintering flue gas temperature is usually at 150 DEG C hereinafter, sulfur dioxide concentration is mostly in 800mg/
Nm3-1500 mg/Nm3, smoke temperature can achieve 70 DEG C -90 DEG C to smoke temperature mostly after 50 DEG C -60 DEG C, dry desulfurization after wet desulphurization, take off
SCR reaction condition is unable to satisfy before and after sulphur.
It is found through retrieval, Chinese invention patent application publication No. CN106257141A, the applying date: on September 28th, 2016, it is public
A kind of recycling of sintering mine sensible heat flue gas denitrification system and its implementation simultaneously are opened, by the two-way sintering flue gas from sintering machine
After deduster, the high temperature sinter that the mean temperature that sintering flue gas and sintering machine come out all the way is 600 DEG C -1000 DEG C is carried out
Heat exchange is warming up to the sintering flue gas that 450 DEG C -650 DEG C are again 100 DEG C -190 DEG C with another way temperature and is mixed, and temperature reaches
Enter SCR reactor after 200 DEG C -400 DEG C, catalytic reduction reaction is carried out in SCR reactor, completes the nitrogen in sintering flue gas
Oxide removal, the sintering flue gas after removing denitrification enter back into waste heat boiler and carry out flue gas heat recovery.The invention
Flue gas denitrification system and method need to heat up to sintering flue gas, temperature reaches 200 DEG C -400 DEG C and enters back into SCR reactor
Nitrogen oxides removal is carried out, although the later period carries out waste heat recycling benefit to the sintering flue gas after removing denitrification using waste heat boiler
With, but this flue gas denitrification system and method still have the shortcomings that energy consumption is high, complex process, device are various；In addition, the invention
The final denitration effect of this flue gas denitrification system and method is not furtherd investigate.
Chinese invention patent application publication No. CN104174287A, the applying date: on August 6th, 2014 discloses a kind of sintering
Machine partial fume denitrating system and method, the invention include deduster, main exhauster of sintering, desulfurizer, desulfurization air-introduced machine, rise
Warm device, denitrification apparatus, denitration air-introduced machine, not denitration flue and chimney；By in main exhauster of sintering and desulfurization air-introduced machine
Under effect, the sintering flue gas that sintering device handpiece flue gas emission mouth is discharged enters desulfurizer through deduster, in flue gas after desulfurization
A part enter not denitration flue, another part enter denitrification apparatus through heat riser under the action of denitration air-introduced machine, so
It mixes afterwards with the flue gas after desulfurization by not denitration flue through smoke stack emission, when discharge standard tends to be stringent, it is possible to reduce into
Enter the exhaust gas volumn of not denitration flue to be adjusted.In the invention, although reducing energy by handling partial fume denitrating
Consumption, processing cost, but for carrying out this partial fume of denitration process for entering denitrification apparatus, it is still necessary to heat riser pair
It heats up, and is warming up to 280 DEG C -420 DEG C if denitrification apparatus is using middling temperature DeNOx, according to low temperature SCR denitration
Then it is warming up to 150 DEG C -200 DEG C.
In order to meet the desulphurization denitration demand of a large amount of low temperature of steel industry, aqueous, sulfur-bearing, dust-laden complexity flue gas, it is desirable to open
The system and method for issuing the sintering flue gas desulfurization denitration that low energy consumption, simple process, denitration effect are good.
Summary of the invention
1. to solve the problems, such as
Before being sintered denitrating flue gas using SCR method for the prior art, need to heat up to sintering flue gas, it can not
The problem of realizing at 80~120 DEG C of ultralow temperature to sintering flue gas denitration, the present invention provides a kind of sintering flue gas SOX、NOxConnection
Emission-reducing system is closed, system through the invention can be realized under 80~120 DEG C of ultralow temperature to sintering flue gas NOxIt is good de-
It removes, provides new thinking and technical support for the denitration of a large amount of low temperature of steel industry, aqueous, sulfur-bearing, dust-laden complexity flue gas.
2. technical solution
To solve the above-mentioned problems, the technical solution adopted in the present invention is as follows:
A kind of sintering flue gas SO of the inventionX、NOxJoint emission-reducing system, including flue collector, the first deduster, desulfurization
Tower, SCR denitration unit and chimney, the first deduster is provided on flue collector, and the outlet end of the first deduster passes through pipeline and cigarette
Chimney is connected, and desulfurizing tower and SCR denitration unit are disposed on the pipeline of the first deduster and chimney；The SCR denitration
Honeycomb catalyst module is filled in unit, which contains Ce-Mn/TiO2Catalyst, the Ce-Mn/TiO2
Catalyst is made of the carrier of denitration activity component and active component, and wherein denitration activity component includes cerium oxide, manganese oxidation
Object and ru oxide, the carrier of active component are titanium dioxide.
Preferably, the second deduster is additionally provided on the pipeline between the desulfurizing tower and SCR denitration unit.
Preferably, first deduster and the second deduster are electrostatic precipitator.
Preferably, having heaters is set on the pipeline between second deduster and SCR denitration unit.
Preferably, rectifier is provided at the top of the SCR denitration unit.
Preferably, be provided with ammonia-spraying grid on the pipeline between heater and SCR denitration unit, the ammonia-spraying grid be used for
Ammoniac compounds are added in pipeline.
Preferably, honeycombed catalyst is filled with 3~7 layers.
Preferably, Ce-Mn/TiO2Mass percent shared by ruthenium element is 1.14%~2.68% in catalyst.
Preferably, Ce-Mn/TiO2Mass percent shared by Cerium in Catalysts element is 1.22%~2.84%, manganese member
Element 10.42%~11.7%.
Preferably, the specific surface area of the honeycombed catalyst is 68~75m2/g。
3. beneficial effect
Compared with the prior art, the invention has the benefit that
(1) a kind of sintering flue gas SO of the inventionX、NOxJoint emission-reducing system, including it is flue collector, the first deduster, de-
Sulphur tower, SCR denitration unit and chimney, the SCR denitration unit is interior to be filled with honeycomb catalyst module, the honeycomb catalyst module
Using cerium oxide, Mn oxide and ru oxide as denitration activity component, using titanium dioxide as the carrier of active component, by
In ruthenium (Ru) be the element that valence state is most in the world, and antiacid, alkali, As, Cl-Corrosive power is very strong, in denitrification process, ruthenium meeting
Many oxidation state are formed, the surface defect of catalyst has been expanded, the active site of catalyst surface is increased, further enhances
Catalyst surface is to NOx、NH3And O2Absorption transmission effect, and catalyst denitration temperature is considerably reduced, so that of the invention
System can be realized under 80~120 DEG C of ultralow temperature to sintering flue gas NOxGood removing；
(2) a kind of sintering flue gas SO of the inventionX、NOxJoint emission-reducing system, 3 are filled in the SCR denitration unit
~7 layers of honeycomb honeycomb catalyst module, the honeycomb catalyst module contain Ce-Mn/TiO2Catalyst, Ce-Mn/TiO2Catalysis
Agent includes the component of following mass percent: Ce elements 1.22%~2.84%, manganese element 10.42%~11.7%, ruthenium element
1.14%~2.68%, titanium elements 45.84%~47.02%, in order to utilize cerium oxide, Mn oxide, ruthenium to the full extent
The activity performance of oxide and the oxygen supply performance of titanium dioxide, to cerium oxide, Mn oxide, ru oxide and titanium dioxide it
Between mass percent proportion relation furtherd investigate so that denitration effect of the catalyst in sintering flue gas denitrification process
More preferably；
(3) a kind of sintering flue gas SO of the inventionX、NOxJoint emission-reducing system, set at the top of the SCR denitration unit
Be equipped with rectifier, the rectifier enable after the desulfurization for entering SCR denitration unit by pipeline sintering flue gas more uniformly with bee
The contact of nest shape honeycomb catalyst module, gives full play to honeycomb catalyst module to sintering flue gas NOxUltralow temperature removing effect；
(4) a kind of sintering flue gas SO of the inventionX、NOxJoint emission-reducing system, structure is simple, design rationally, be easy to structure
It makes.
Detailed description of the invention
Fig. 1 is sintering flue gas SO of the inventionX、NOxJoint emission-reducing system structural schematic diagram；
Label declaration in figure:
100, flue collector；110, the first deduster；
200, desulfurizing tower；210, the second deduster；220, heater；230, ammonia-spraying grid；
240, rectifier；300, SCR denitration unit；400, chimney.
Specific embodiment
The present invention is further described below combined with specific embodiments below.
Although these specific embodiments are described in sufficient detail so that those skilled in the art can implement the present invention,
It is to be understood that can realize other embodiments and can make without departing from the spirit and scope of the present invention to the present invention each
Kind changes.Required the scope of the present invention is hereafter not limited to the more detailed description of the embodiment of the present invention, and
It is of the invention best to propose to execute just to be illustrated and do not limit the description to the features of the present invention and feature
Mode, and it is sufficient to make those skilled in the art that can implement the present invention.Therefore, the scope of the present invention is only by appended claims
To limit.
Embodiment 1
As shown in Figure 1, a kind of sintering flue gas SO of the inventionX、NOxJoint emission-reducing system include flue collector 100, first
Deduster 110, desulfurizing tower 200, SCR denitration unit 300 and chimney 400 are provided with the first deduster 110 on flue collector 100, and
The outlet end of one deduster 110 is connected by pipeline with chimney 400, on the pipeline of the first deduster 110 and chimney 400 successively
It is provided with desulfurizing tower 200 and SCR denitration unit 300；It is additionally provided on pipeline between desulfurizing tower 200 and SCR denitration unit 300
Second deduster 210 sets gradually having heaters on the pipeline between second deduster 210 and SCR denitration unit 300
220 and ammonia-spraying grid 230；The top of the SCR denitration unit 300 is provided with rectifier 240, filling in SCR denitration unit 300
There is honeycomb catalyst module, which contains Ce-Mn/TiO2Catalyst；The Ce-Mn/TiO2The denitration of catalyst
Active component includes cerium oxide, Mn oxide and ru oxide.
It should be noted that the first deduster 110 and the second deduster 210 are electrostatic precipitator, to sintering cigarette
Gas is dusted processing, prevents flue dust blocking pipeline or subsequent desulphurization and denitration process equipment.Ammonia-spraying grid 230 is used for pipeline
Interior addition ammonia (or liquefied ammonia) is to ensure that catalytic denitration reaction is gone on smoothly in SCR denitration unit 300；Heater 220 is set
It sets for heating the sintering flue gas after desulfurization, to ensure that the catalyst in SCR denitration unit 300 reaches best denitration effect.
It is significant to note that unlike the prior art, the heater 220 in the system of the present embodiment does not need to take off
Sintering flue gas after sulphur is heated to 150 DEG C or more, it is only necessary to 80~120 DEG C is heated to, because in subsequent SCR denitration unit 300
Honeycomb catalyst module can be realized at 80~120 DEG C of ultralow temperature to NOXGood removing, guarantee denitration effect it is same
When reduce energy consumption, to reduce process costs.
In addition, the flue gas of pending denitration process is to be sent into SCR by the rectifier 240 being arranged at the top of SCR denitration unit 300
Denitration unit 300, the purpose that rectifier is arranged is: the sintering flue gas after desulfurization is entering SCR denitration unit by pipeline
Before, since compared with 300 internal diameter of SCR denitration unit, internal diameter of the pipeline is relatively small, being directly entered SCR denitration unit can make
Sintering flue gas is concentrated mainly on the surface in the middle part of catalyst layer, and can not with entire catalyst layer contacts, in order to avoid this
Situation, setting rectifier can be such that the sintering flue gas after desulfurization is evenly distributed in entire catalyst layer surface, it is ensured that sintering
Flue gas comes into full contact with catalyst, improves to sintering flue gas NOxRemoval effect.
3~7 layers of honeycomb catalyst module can be filled in the SCR denitration unit 300, as shown in Figure 1, the present embodiment
It is middle to fill the honeycomb catalyst module that haves three layers.The honeycomb catalyst module is honeycomb, by denitration activity component and active component
Carrier composition, wherein denitration activity component includes cerium oxide, Mn oxide and ru oxide, and the carrier of active component is dioxy
Change titanium.
It should be further noted that each metallic element of the honeycombed catalyst of the present embodiment accounts for the quality of monolithic catalyst
Percentage is respectively as follows: Ce 2.44%, Mn 10.74%, Ru 1.14%, Ti 47.02%, wherein the gross activity of Ce, Mn and Ru
The mass percent of element is 14.32%.The specific surface area of catalyst is 68~75m2/g.The honeycomb catalyst module passes through
Following steps are prepared:
(1) Ru-Ce-Mn/TiO is prepared2Catalyst
A, 0.038 part of cerium nitrate hexahydrate and 0.245 part of four water manganese nitrates are weighed, take 5 parts by volume deionized water and
The dehydrated alcohol of 10 parts by volume is mixed into ethanol water, then that cerium nitrate hexahydrate and four water manganese nitrates be added to ethyl alcohol is water-soluble
In liquid, it is uniformly mixed and is configured to active component solution A；Then 0.393 part of anatase TiO is weighed2As carrier, by anatase
TiO2It is added in active component solution A, being vigorously stirred the time is 30min；Collection of the solution at 60~70 DEG C after being vigorously stirred
Heating stirring 100min is evaporated to obtain sediment to solution in hot type magnetic stirring apparatus, so that active component solution A is loaded to
TiO2On carrier.Sediment is ground to after no granular sensation and is put into Muffle kiln roasting, it is 500 that temperature T1 is wherein roasted in Muffle furnace
DEG C, Ce-Mn/TiO is finally made in calcining time 4h2Catalyst fines；
B, the dehydrated alcohol of the nitrosyl nitric acid ruthenium for weighing 0.38 part, the deionized water and 10 parts by volume that take 5 parts by volume is mixed
Nitrosyl nitric acid ruthenium is added in ethanol water by synthesizing alcohol aqueous solution, is uniformly mixed and is configured to active component solution B；
The Ce-Mn/TiO that will be prepared again2Catalyst fines are added in active component solution B, and being vigorously stirred the time is 30min；It is acute
Solution after the strong stirring heating stirring 100min in 60~70 DEG C of heat-collecting magnetic stirring device is evaporated to solution to be precipitated
Object, so that active component solution B loads to Ce-Mn/TiO2On catalyst.Muffle is put into after sediment is ground to no granular sensation
Kiln roasting, it is 400 DEG C, calcining time 3h that temperature T1 is wherein roasted in Muffle furnace, and Ru-Ce-Mn/TiO is made2Catalyst powder
End；The Ru-Ce-Mn/TiO of 40~60 mesh is obtained by tabletting, screening2Catalyst granules.Wherein the unit of mass parts pair is g
When, corresponding parts by volume is ml；When the unit of mass parts pair is kg, corresponding parts by volume is L.
(2) honeycomb catalyst module is prepared
By mass percentage, by the Ru-Ce-Mn/TiO in step (1)2Catalyst and 15% glass fibre, 3%
Binder methylcellulose, 12% extrusion aid glycerol, the mixing of 2.5% expanding agent active carbon, the water for adding 8% are glued
It closes；Walk after bonding is passed through into mechanical presses pugging, the walk after pugging is wrapped up tight still aging with plastic paper
24h；The walk after ageing is packed into extrusion pipe again, is squeezed by grinding tool, prepares molding honeycomb Ru-Ce-Mn/
TiO2Catalyst idiosome；It is dry at 105 DEG C, honeycomb catalyst module is prepared after roasting at 300 DEG C -500 DEG C.
It is worth noting that, roasting obtains Ce-Mn/TiO in the A stage of step (1)2The roasting temperature of catalyst fines
Spending T1 is 500 DEG C, and in the B-stage of step (1), roasting obtains Ru-Ce-Mn/TiO2The maturing temperature T2 of catalyst granules is
400 DEG C, T1 is higher than T2, and the calcining time in the A stage of step (1) is 4h, the calcining time in the B-stage of step (1)
For 3h.By using this segmentation dipping, the mode roasted and different maturing temperatures, calcining time are designed, makes each metal
Element has all reached most oxidation state quantity, and storage oxygen oxygen release performance is most strong, realizes the maximization of Ru-Ce-Mn active element
It utilizes, so that the denitration effect of honeycomb catalyst module is more preferable.
Its cardinal principle is as follows: under maturing temperature appropriate and calcining time, catalyst surface Lewis acid site is most
More, specific surface area and aperture are maximum, and denitration effect is best, and the Ce-Mn/ that optimum state is made is impregnated and roasted by the first stage
TiO2Catalyst.In addition, Ru is the metal that valence state is most in the world and antiacid, alkali, As, Cl-Corrosive power is very strong, the oxidation of Ru
Object surface defect is most, and the most stable of oxidation state of Ru is RuO2, other oxidation state are all unstable, so Ru is to RuO2Conversion process
In transition state be particularly important in the catalyst.In order to make a large amount of Ru be converted into RuO2Transition state, and by this transition
State loads to Ce-Mn/TiO2On catalyst, the denitration temperature of catalyst is greatly lowered and significantly improve denitration effect and it is anti-in
Toxicity energy, and use second stage to impregnate and roast, and be selected differently from maturing temperature and the time of first stage, institute is made
State Ru-Ce-Mn/TiO2Catalyst.
The method of denitration of agglomeration for iron mine flue gas combined desulfurization and denitration system of the invention are as follows:
S1, flue gas desulfurization
After the sintering flue gas that sintering machine generates is dusted processing into the first deduster 110 by flue collector 100, remove
Sintering flue gas after flue dust is sent into the bottom of desulfurizing tower 200 by exhaust fan, and sintering flue gas flows in desulfurizing tower 200 from bottom to top
It is dynamic, carry out semi-dry desulphurization processing；
S2, denitrating flue gas
Sintering flue gas after desulfurization enters the second deduster 210 by pipeline from the top of desulfurizing tower 200, is dusted again
Processing, desulfurization sintering flue gas after dust removal process are heated to 80~120 DEG C by heater 220, and by ammonia-spraying grid 230 to
Ammonia (perhaps liquefied ammonia) ammonia-spraying grid 230 is added in desulfurization sintering flue gas after heating can be uniform by ammonia (or liquefied ammonia)
It sprays into pipeline, so that ammonia (or liquefied ammonia) can be mixed more fully with sintering flue gas；Then, flue gas is introduced by pipeline
300 top of SCR denitration unit, is sent into SCR denitration unit 300 by the rectifier 240 being arranged at the top of SCR denitration unit 300
Portion, SCR denitration unit 300 is interior to be filled with honeycomb catalyst module, which contains Ce-Mn/TiO2Catalysis
Agent；The Ce-Mn/TiO2The denitration activity component of catalyst includes cerium oxide, Mn oxide and ru oxide.Flue gas passes through
Carry out catalytic denitration is come into full contact with honeycomb catalyst module, the volume space velocity of sintering flue gas is 3000 in SCR denitration unit 300
~4000/h.
Use a kind of sintering flue gas SO of the present embodimentX、NOxJoint emission-reducing system, it can be achieved that ultralow at 80~120 DEG C
Denitration efficiency under temperature considerably reduces catalyst denitration temperature, enables method of the invention real up to 80% or more
To sintering flue gas NO under present 80~120 DEG C of ultralow temperaturexGood removing.
The present invention is described in detail above in conjunction with specific exemplary embodiment.It is understood, however, that can not take off
It is carry out various modifications in the case where from the scope of the present invention being defined by the following claims and modification.Detailed description and drawings
Should be to be considered only as it is illustrative and not restrictive, if there is any such modifications and variations, then they all will
It falls into the scope of the present invention described herein.In addition, Development Status and meaning that background technique is intended in order to illustrate this technology,
It is not intended to limit the present invention or the application and application field of the invention.
Claims (8)
1. a kind of sintering flue gas SOX、NOxJoint emission-reducing system, it is characterised in that: including flue collector (100), the first deduster
(110), desulfurizing tower (200), SCR denitration unit (300) and chimney (400), flue collector are provided with the first deduster on (100)
(110), the outlet end of the first deduster (110) is connected by pipeline with chimney (400), the first deduster (110) and chimney
(400) desulfurizing tower (200) and SCR denitration unit (300) are disposed on pipeline；In the SCR denitration unit (300)
Filled with honeycomb catalyst module, which contains Ce-Mn/TiO2Catalyst, the Ce-Mn/TiO2Catalyst
It is made of the carrier of denitration activity component and active component, wherein denitration activity component includes cerium oxide, Mn oxide and ruthenium
Oxide, the carrier of active component are titanium dioxide.
2. a kind of sintering flue gas SO according to claim 1X、NOxJoint emission-reducing system, it is characterised in that: the desulfurization
The second deduster (210) are additionally provided on pipeline between tower (200) and SCR denitration unit (300).
3. a kind of sintering flue gas SO according to claim 2X、NOxJoint emission-reducing system, it is characterised in that: described first
Deduster (110) and the second deduster (210) are electrostatic precipitator.
4. a kind of sintering flue gas SO according to claim 2X、NOxJoint emission-reducing system, it is characterised in that: described second
Having heaters (220) are set on pipeline between deduster (210) and SCR denitration unit (300).
5. a kind of sintering flue gas SO according to claim 1X、NOxJoint emission-reducing system, it is characterised in that: the SCR
Rectifier (240) are provided at the top of denitration unit (300).
6. a kind of sintering flue gas SO according to claim 2X、NOxJoint emission-reducing system, it is characterised in that: heater
(220) ammonia-spraying grid (230) are provided on the pipeline between SCR denitration unit (300), the ammonia-spraying grid (230) be used for
Ammoniac compounds are added in pipeline.
7. a kind of sintering flue gas SO according to claim 1X、NOxJoint emission-reducing system, it is characterised in that: the honeycomb
Catalyst module is filled with 3~7 layers.
8. a kind of sintering flue gas SO according to claim 77X、NOxJoint emission-reducing system, it is characterised in that: the bee
The specific surface area of nest shape catalyst is 68~75m2/g。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109999638A (en) * | 2019-05-20 | 2019-07-12 | 江苏绿叶环境工程集团有限公司 | A kind of cleaner system for flue gas desulfurization purification |
| CN113262630A (en) * | 2021-05-12 | 2021-08-17 | 上海环境卫生工程设计院有限公司 | Denitration equipment for solving problem of high ammonia escape in flue gas of waste incineration plant |
| CN113499774A (en) * | 2021-08-17 | 2021-10-15 | 安徽工业大学 | Preparation method of ruthenium-based high-water-sulfur-resistance sintering flue gas low-temperature denitration catalyst |
| CN115253633A (en) * | 2022-07-21 | 2022-11-01 | 上海市机电设计研究院有限公司 | Waste incineration flue gas purification method and system |
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