CN108246075A - Pelletizing denitration method for flue gas - Google Patents
Pelletizing denitration method for flue gas Download PDFInfo
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- CN108246075A CN108246075A CN201810087604.2A CN201810087604A CN108246075A CN 108246075 A CN108246075 A CN 108246075A CN 201810087604 A CN201810087604 A CN 201810087604A CN 108246075 A CN108246075 A CN 108246075A
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- flue gas
- flue
- pelletizing
- ammonia
- denitration method
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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
- B01D53/76—Gas phase processes, e.g. by using aerosols
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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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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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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- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
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Abstract
The present invention provides a kind of pelletizing denitration method for flue gas, and the pelletizing denitration method for flue gas includes：Step A:The reducing agent of liquid is blown in flue between pellet chain combing machines and pelletizing rotary kiln；Step B:The drop gasification for being formed the reducing agent of injection using fume high-temperature in flue is ammonia；Step C:In flue, redox reaction occurs for the nitrogen oxides in the ammonia and flue gas, nitrogen oxides is reduced to nitrogen and water, remaining unreacted flue gas enters ammonia process desulfuration tower together, carries out recycling ammonia and flue gas and enters ammonia process desulfuration tower together, is recycled.The present invention has small investment, takes up an area less, operation cost is low, does not generate the advantages such as other pernicious gases.
Description
Technical field
The present invention relates to denitrating flue gas to administer field, and in particular to a kind of technology that steel and iron industry pelletizing denitrating flue gas is administered
Method, i.e., a kind of pelletizing denitration method for flue gas.
Background technology
Pollutant is mostly derived from coal dust and the SO of coke powder burning generation in steel and iron industry pelletizing flue gas2, CO and NOX, these are dirty
Dye object, which is entered in surrounding air, to be polluted.Iron and steel enterprise's pelletizing is carried out using catalytic reduction method or activated carbon adsorption catalysis method
Denitration.
From the point of view of the practical operation situation of agglomerates of sintered pellets, catalytic reduction method is needed using special-purpose catalyst, and investment cost is high,
Take up an area greatly, easily block, troublesome maintenance, catalyst life is short, needs to regularly replace, and the later stage has solid waste to handle.
Though activated carbon process can remove the multiple pollutants such as, bioxin simultaneously, due to activated-carbon device denitration efficiency
Not high, outlet pelletizing nitrogen oxides in effluent concentration is still higher, limited to pelletizing nitrogen oxides emission reduction ability, need to use multistage
Absorption is handled, while in activated carbon activating and regenerating, there is the generation of other exhaust gas, and reabsorbing processing needs to increase investment and be processed into
This, along with activated-carbon device construction cost and operating cost are very high, investment is big, takes up an area wide, complicated for operation, environment protection treating
Input is big and benefit is low, and pelletizing flue gas ton ore deposit processing cost is higher.
In conclusion problems with exists in the prior art：Investment is big, and processing procedure increases pollutant emission.
Invention content
The present invention provides a kind of pelletizing denitration method for flue gas, and big, processing procedure increasing is invested to solve existing method of denitration
The problem of adding pollutant emission.
For this purpose, the present invention proposes a kind of pelletizing denitration method for flue gas, the pelletizing denitration method for flue gas includes：
Step A:The reducing agent of liquid is blown in flue between pellet chain combing machines and pelletizing rotary kiln；
Step B:The drop gasification for being formed the reducing agent of injection using fume high-temperature in flue is ammonia；
Step C:In flue, redox reaction occurs for the nitrogen oxides in the ammonia and flue gas, by nitrogen oxides
It is reduced to nitrogen and water；
Step D:Remaining unreacted ammonia and flue gas in step C is made to enter ammonia process desulfuration tower together, is recycled.
Further, in step D, remaining unreacted ammonia and pelletizing flue gas are by pipeline, into the ammonia process of desulfurization
Tower, the be cooled ammonium hydroxide of water or 0.1%~15% concentration of the unreacted ammonia of residue are reuptaked.
Further, the reducing agent is liquefied ammonia or ammonium hydroxide.
Further, the flue between pellet chain combing machines and rotary kiln side wall carry out trepanning, install atomizer or
Spray gun, nozzle quantity is a for n (n >=1), and the reducing agent is delivered to the atomizer or spray gun by pipeline, utilizes
Atomizer or spray gun are blown the reducing agent to flue inside, and by high pressure blow smelting operation, equally distributed mist is formed in flue
Change drop.
Further, what each atomizer can rotate is arranged in the flue, each atomizer can and flue
Airflow direction forms adverse current or fair current injection method.
Further, each atomizer and flue gas, which flow to angle, can carry out 360 adjustings.
Further, the injection amount of high pressure atomizing nozzle can be adjusted with automatic or manual, according to pelletizing exiting flue gas nitrogen oxygen
Compound concentration and ammonia concn variation control correspond to NO molar concentrations according to ammonia and carry out ratio control injection.
Further, in step C, the flue is transferred l-shaped, what the ammonia and flue gas were formed in the flue of turnover
Turbulent flow, the environment temperature that redox reaction occurs for the nitrogen oxides in the ammonia and flue gas are 850~1200 DEG C, during reaction
Between for 1~10s, the reaction time is converted into according to drying grate length and wind speed, nitrogen oxides is made to be reduced to nitrogen and water,
Nitrogen after reaction enters desulphurization system with flue gas, is arranged by the way that desulfuration chimney is outer together.
Further, in the rectangular cross-section of the flue, the side wall of the flue is divided into top surface, bottom surface and positioned at top surface
Two sides between bottom surface, the atomizer are mounted on top surface and two sides.
Further, in step A, a concentration of 5~35% ammonium hydroxide from tank used for storing ammonia by pipeline, utilize compressed air
Ammonium hydroxide is sprayed into flue.
The present invention makes full use of the smoke heat energy between original pellet chain combing machines and rotary kiln to be vaporized and high temperature reduction
Reaction is lost substantially without additional thermal energy, saves processing cost.
The present invention carries out pelletizing denitrating flue gas using the new method of pelletizing denitrating flue gas, only in pellet chain combing machines and rotary kiln
Between flue trepanning, to original pelletizing production facility change it is minimum, do not influence the normal production of original pelletizing, can continuously into
Row construction and operation.
The tank used for storing ammonia of the shared ammonia method desulfurizing system of the present invention carries out storage ammonium hydroxide or dilutes liquefied ammonia, and infrastructure investment is few,
It saves and takes up an area.
Present invention automation adjusts atomizer spray flux, effectively improves the efficiency of denitration, saves the consumption of reducing agent.
The present invention escapes without remaining ammonia, and the complete ammonia of unreacted is further absorbed by ammonia method desulfurizing system,
Entire denitrification process is innoxious.
Description of the drawings
Fig. 1 is the operation principle schematic diagram of the pelletizing denitration method for flue gas of the present invention；
Fig. 2 is that the flue cross section of the present invention installs the schematic diagram of nozzle.
Drawing reference numeral explanation：
1st, pellet chain combing machines；2nd, trepanning；3rd, flue；4th, pelletizing rotary kiln；5th, ammonia process desulfuration tower (also referred to as desulfurizing tower)；6th, cigarette
Chimney；7th, gas gathering mask；8th, electric precipitator；9th, main exhauster；10th, tank used for storing ammonia；11st, compressed air cylinder；12nd, finished bin；
101st, preheating section；102nd, dryer section；201st, it pumps；202nd, counter flow controller；203rd, flow control valve；204th, pressure control
Valve processed；401st, gas-fired nozzle；
A, side wall；B, atomizer；C, pipeline；D, pipeline.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control illustrates this hair
It is bright.
As depicted in figs. 1 and 2, the present invention proposes a kind of pelletizing denitration method for flue gas, the pelletizing denitration method for flue gas packet
It includes：
Step A:The reducing agent of liquid is blown in flue 3 between pellet chain combing machines 1 and pelletizing rotary kiln 4；
Step B:The drop gasification for being formed the reducing agent of injection using fume high-temperature in flue 3 is ammonia；
Step C:In flue 3, redox reaction occurs for the nitrogen oxides in the ammonia and flue gas, by nitrogen oxides
It is reduced to nitrogen and water；
Step D:Remaining unreacted ammonia and flue gas is made to enter ammonia process desulfuration tower 5 together, is recycled.
Further：The punching installation mist on the refractory brick of flue 3 (i.e. pellet chain combing machines preheating section tail end flue) side wall
Change nozzle B, setting trepanning 2 is all punched in entire flue bending section place, atomizer B is installed, to realize to pellet chain combing machines 1
Flue 3 between pelletizing rotary kiln 4 is blown the reducing agent of liquid；2 pore size of trepanning is more slightly larger 1~5cm than atomizer B,
Each 2 pitch-row interval of trepanning is identical, to accomplish to be evenly arranged.
Pellet chain combing machines preheating section tail end flue is the posterior segment for entering drying grate in pelletizing production technique after the completion of ball processed
Flue (flue at pellet chain combing machines preheating section tail end), section is rectangle, which connects and enter pelletizing revolution
Flue between kiln, with pelletizing rotary kiln forms the turbulent flow that turnover flue, the ammonia and flue gas are formed in turnover flue,
Flue i.e. between pellet chain combing machines preheating section connection pelletizing rotary kiln turns upwards towards, when ammonia air-flow is transferred and into rotary kiln
When the turbulent flow that occurs of flue gas, ammonia and flue gas carry out mixing at this time.
Further：The atomizer is 360 degree of adjustings, i.e., each atomizer and flue gas flow to angle can
To carry out omnidirectional's adjusting, all directions rotation adjusts angle between 0~90 degree, and atomizer can be formed with flue gas stream direction
The injection methods such as adverse current or fair current.
Atomizer is mounted on flue sidewall, and the blowing direction of nozzle can be adjusted up and down；It is sprayed in installation
Omnidirectional's adjusting is carried out to nozzle blowing direction according to injection atomization coverage effect during mouth, ensures the nozzle atomization drop energy in three faces
Enough entire flue interfaces of uniform fold.
Further：The tank used for storing ammonia 10 is connected to mist for desulphurization system is original or independent tank used for storing ammonia by pipeline D
Change nozzle B, flow control valve is set up before atomizer is connected, control and uninterrupted control is opened and closed.
Further：The automatic or manual adjusts liquefied ammonia or ammonia spray amount, refers to according to flue gas NOx on-line measurement instrument
The nitrous oxides concentration of flue gas in pelletizing exhaust pass is measured, according to ammonia and the reactional equation of nitrogen oxides, artificial settings is pressed
It is 1~2 according to the molar ratio of ammonium hydroxide and reaction of nitrogen oxides：1 carries out injection liquefied ammonia or ammonium hydroxide, and have artificial or automatic injection
Ratio capability for correcting.
Further：The complete ammonia of unreacted, which refers to, fails reaction or excess of ammonia in time in the flue gas for leave rotary kiln
Gas, these flue gases are discharged by pipeline C to ammonia method desulfurizing system, for example, into desulfurizing tower, are made after being absorbed again by ammonium hydroxide
For desulfurizing agent reuse.
The ammonia method desulfurizing system is the processing system for removing sulfur dioxide in flue gas, which passes through cigarette
Road connection pelletizing rotary kiln outlet, entire flue inside are closed.
The present invention the course of work be：The side wall of connection flue between pellet chain combing machines preheating section and pelletizing rotary kiln
Three face trepannings install liquid atomizing nozzle, and atomizer can be adjusted with omnidirectional, by measuring the concentration of NO in flue gas certainly
Emitted dose that is dynamic or manually adjusting liquefied ammonia or ammonium hydroxide；A concentration of 5~35% ammonium hydroxide from desulphurization system ammonia water tank by pipeline,
Ammonium hydroxide is sprayed into flue using compressed air, the ammonium hydroxide drop after atomization makes full use of the high temperature cigarette that pelletizing rotary kiln flows through
Gas is ammonia directly the gasification of reducing agent drop, while using flue gas high flow rate characteristic in flue, is turning ammonia and flue gas
The turbulent flow formed in flue is rolled over, ammonia and flue gas is sufficiently mixed, enters in pellet chain combing machines preheating section flue in mixer,
Since gas-fired forms the high temperature that temperature reaches 850~1200 DEG C of hot environment, for example, 950 degree, ammonia in rotary kiln
Reduction reaction is generated with pelletizing nitrogen oxides in effluent, nitrogen oxides is reduced to nitrogen and water, and unreacted ammonia is with flue gas
It discharges together, the flue gas of discharge enters ammonia method desulfurizing system by flue, and it is 0.1~5% that ammonia, which is desulfurized in-system concentration,
Ammonium hydroxide absorbs, and is re-used as desulfurizing agent and is used, accomplishes the ammonia harmlessness disposing in pelletizing flue gas.
As shown in Figure 1 and Figure 2, the present invention provides a kind of pelletizing denitrating flue gas processing system, including pellet chain combing machines 1, the chain
Comb machine connects pelletizing rotary kiln 4 by flue 3, and multigroup high pressure atomizing nozzle B is installed in the side wall A setting trepannings 2 on flue 3,
Nozzle can be with 90 degree of adjustings of omnidirectional, and the compressed air of compressed air cylinder 11 is connected to nozzle B by pipeline C, while pumps 201 and pass through
Pipeline D and the liquefied ammonia in tank used for storing ammonia 10 or ammonium hydroxide are delivered to high pressure atomizing nozzle B, under the injection of pressure-air, liquefied ammonia
Or ammonia water and air is injected into flue 3.
The jetting pressure of atomizer B is adjusted by pressure-control valve 204, the variation of exiting flue gas nitrous oxides concentration
When, ammonium hydroxide injection amount is controlled by flow control valve 203, extra ammonium hydroxide flows back into tank used for storing ammonia 10 by counter flow controller 202.
In pelletizing rotary kiln 4, gas-fired nozzle 401 sprays into a large amount of coal gas and carries out fuel gas buring, and the flue-gas temperature after burning is 800
~1200 DEG C.
The smaller liquid particles of a large amount of diameters are formed after nozzle B injection, fine drop gasification is ammonia in flue 3, together
The flue gas stream of high speed, forms turbulent flow in flue in Shi Liyong flues 3, and flue gas in ammonia and flue 3 is sufficiently mixed, and
Start with the reaction of nitrogen oxides in flue gas, the gas produced after reaction enters pellet chain combing machines 1 with flue gas.
1 top of drying grate is divided into preheating section 101 and dryer section 102, and flue gas collection is carried out using the gas gathering mask 7 of two sections of tops
In, flue gas is sucked into electric precipitator 8 under 9 negative pressure of main exhauster, main exhausting extension set 9, which exports, connects ammonia process desulfuration tower 5, in flue gas
Remained ammonia is absorbed in desulfurizing tower 5, and flue gas is discharged from chimney 6 after processing, and pelletizing finished product is stored by finished bin 12.
It is final to reduce pelletizing nitrogen oxides in effluent concentration by the present invention.The present invention has small investment, takes up an area few, fortune
It seeks at low cost, does not generate the advantages such as other pernicious gases.
The foregoing is merely the schematical specific embodiments of the present invention, are not limited to the scope of the present invention.For this
Each component part of invention can be combined with each other under conditions of not conflicting, any those skilled in the art, not depart from this
Made equivalent variations and modification, should all belong to the scope of protection of the invention under the premise of the design of invention and principle.
Claims (10)
1. a kind of pelletizing denitration method for flue gas, which is characterized in that the pelletizing denitration method for flue gas includes：
Step A:The reducing agent of liquid is blown in flue between pellet chain combing machines and pelletizing rotary kiln；
Step B:The drop gasification for being formed the reducing agent of injection using fume high-temperature in flue is ammonia；
Step C:In flue, redox reaction occurs for the nitrogen oxides in the ammonia and flue gas, and nitrogen oxides is restored
For nitrogen and water；
Step D:Remaining unreacted ammonia and flue gas in step C is made to enter ammonia process desulfuration tower together, is recycled.
2. pelletizing denitration method for flue gas as described in claim 1, which is characterized in that in step D, remaining unreacted ammonia and
Pelletizing flue gas is by pipeline, and into the ammonia process desulfuration tower, the unreacted ammonia of residue is desulfurized system and reuptakes.
3. pelletizing denitration method for flue gas as described in claim 1, which is characterized in that the reducing agent is liquefied ammonia or ammonium hydroxide.
4. pelletizing denitration method for flue gas as described in claim 1, which is characterized in that between pellet chain combing machines and rotary kiln
The side wall of flue carries out trepanning, installs atomizer or spray gun, and nozzle quantity is a for n (n >=1), by pipeline by the reduction
Agent is delivered to the atomizer or spray gun, is blown the reducing agent to flue inside using atomizer or spray gun, passes through
The high pressure blow smelting operation of pressure 0.55-0.8Mpa forms equally distributed atomized drop in flue.
5. pelletizing denitration method for flue gas as claimed in claim 4, which is characterized in that each atomizer can rotate is arranged on
In the flue, each atomizer can form adverse current or fair current injection method with flue gas stream direction.
6. pelletizing denitration method for flue gas as claimed in claim 5, which is characterized in that each atomizer and flue gas flow direction
Angle can carry out 360 degree of adjustings.
7. pelletizing denitration method for flue gas as claimed in claim 5, which is characterized in that the injection amount of high pressure atomizing nozzle can be certainly
It moves or manually adjusts, according to pelletizing exiting flue gas nitrous oxides concentration and ammonia concn variation control, NO is corresponded to according to ammoniaXIt rubs
Your concentration carries out ratio control injection.
8. pelletizing denitration method for flue gas as described in claim 1, which is characterized in that in step C, the flue turnover l-shaped,
Redox occurs for the turbulent flow that the ammonia and flue gas are formed in the flue of turnover, the nitrogen oxides in the ammonia and flue gas
The environment temperature of reaction is 850~1200 DEG C, and the reaction time is 1~10s, and nitrogen oxides is made to be reduced to nitrogen and water, is reacted
Nitrogen afterwards is arranged with flue gas is outer.
9. pelletizing denitration method for flue gas as claimed in claim 2, which is characterized in that in the rectangular cross-section of the flue, institute
The side wall for stating flue is divided into top surface, bottom surface and two sides between top and bottom, and the atomizer is mounted on top
On face and two sides.
10. pelletizing denitration method for flue gas as claimed in claim 2, which is characterized in that in step A, a concentration of 5~35%
Ammonium hydroxide, by pipeline, sprays ammonium hydroxide into flue from tank used for storing ammonia using compressed air.
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| CN201810087604.2A CN108246075B (en) | 2018-01-30 | 2018-01-30 | Pelletizing denitration method for flue gas |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108671751A (en) * | 2018-07-10 | 2018-10-19 | 北京首钢国际工程技术有限公司 | A kind of chain grate-rotary kiln pelletizing equipment for denitrifying flue gas and application method |
| CN110449013A (en) * | 2019-07-27 | 2019-11-15 | 河南豫光锌业有限公司 | A method of administering rotary kiln exhaust gas nitrogen oxides |
| CN114061321A (en) * | 2020-08-07 | 2022-02-18 | 中冶长天国际工程有限责任公司 | Pellet flue gas treatment system based on primary circulating air intake of rotary kiln and flue gas treatment process thereof |
| CN114061320A (en) * | 2020-08-07 | 2022-02-18 | 中冶长天国际工程有限责任公司 | Circulating coupling treatment system for pellet flue gas of chain grate machine, rotary kiln and circular cooler and flue gas treatment process thereof |
| CN114061319A (en) * | 2020-08-07 | 2022-02-18 | 中冶长天国际工程有限责任公司 | Grate-rotary kiln pellet flue gas circulation treatment system and flue gas treatment process thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907398A (en) * | 2009-06-05 | 2010-12-08 | 中冶长天国际工程有限责任公司 | Preheated pellet recovering and grading bucket below chain grating machine |
| CN105344236A (en) * | 2015-11-13 | 2016-02-24 | 西南化工研究设计院有限公司 | An integrated desulfurization-denitrification-dedusting process for coke oven flue gas |
| CN105498504A (en) * | 2016-01-29 | 2016-04-20 | 铜陵有色金属集团股份有限公司铜冠冶化分公司 | Iron ore agglomeration sintering tail gas purifying device and purifying method as well as application thereof |
| CN106268270A (en) * | 2016-10-21 | 2017-01-04 | 福建龙净脱硫脱硝工程有限公司 | A kind of grate kiln denitrating system |
-
2018
- 2018-01-30 CN CN201810087604.2A patent/CN108246075B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907398A (en) * | 2009-06-05 | 2010-12-08 | 中冶长天国际工程有限责任公司 | Preheated pellet recovering and grading bucket below chain grating machine |
| CN105344236A (en) * | 2015-11-13 | 2016-02-24 | 西南化工研究设计院有限公司 | An integrated desulfurization-denitrification-dedusting process for coke oven flue gas |
| CN105498504A (en) * | 2016-01-29 | 2016-04-20 | 铜陵有色金属集团股份有限公司铜冠冶化分公司 | Iron ore agglomeration sintering tail gas purifying device and purifying method as well as application thereof |
| CN106268270A (en) * | 2016-10-21 | 2017-01-04 | 福建龙净脱硫脱硝工程有限公司 | A kind of grate kiln denitrating system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108671751A (en) * | 2018-07-10 | 2018-10-19 | 北京首钢国际工程技术有限公司 | A kind of chain grate-rotary kiln pelletizing equipment for denitrifying flue gas and application method |
| CN110449013A (en) * | 2019-07-27 | 2019-11-15 | 河南豫光锌业有限公司 | A method of administering rotary kiln exhaust gas nitrogen oxides |
| CN114061321A (en) * | 2020-08-07 | 2022-02-18 | 中冶长天国际工程有限责任公司 | Pellet flue gas treatment system based on primary circulating air intake of rotary kiln and flue gas treatment process thereof |
| CN114061320A (en) * | 2020-08-07 | 2022-02-18 | 中冶长天国际工程有限责任公司 | Circulating coupling treatment system for pellet flue gas of chain grate machine, rotary kiln and circular cooler and flue gas treatment process thereof |
| CN114061319A (en) * | 2020-08-07 | 2022-02-18 | 中冶长天国际工程有限责任公司 | Grate-rotary kiln pellet flue gas circulation treatment system and flue gas treatment process thereof |
| CN114061320B (en) * | 2020-08-07 | 2023-06-23 | 中冶长天国际工程有限责任公司 | Grate-rotary kiln-circular cooler pellet smoke circulation coupling treatment system and smoke treatment process thereof |
| CN114061321B (en) * | 2020-08-07 | 2023-06-23 | 中冶长天国际工程有限责任公司 | Pellet flue gas treatment system based on rotary kiln primary circulation air inlet and flue gas treatment process thereof |
| CN114061319B (en) * | 2020-08-07 | 2023-06-30 | 中冶长天国际工程有限责任公司 | Grate-rotary kiln pellet smoke circulation treatment system and smoke treatment process thereof |
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| Publication number | Publication date |
|---|---|
| CN108246075B (en) | 2019-12-03 |
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