CN108246075B - Pelletizing denitration method for flue gas - Google Patents
Pelletizing denitration method for flue gas Download PDFInfo
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- CN108246075B CN108246075B CN201810087604.2A CN201810087604A CN108246075B CN 108246075 B CN108246075 B CN 108246075B CN 201810087604 A CN201810087604 A CN 201810087604A CN 108246075 B CN108246075 B CN 108246075B
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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)
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- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Treating Waste Gases (AREA)
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 into the flue between pellet chain combing machines and pelletizing rotary kiln；Step B: the drop that the reducing agent of blowing is formed is gasified as ammonia using fume high-temperature in flue；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, it carries out recycling ammonia and flue gas enters ammonia process desulfuration tower together, recycled.The present invention has small investment, and land occupation is few, and 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 technique
The SO that pollutant is mostly derived from coal dust in steel and iron industry pelletizing flue gas and coke powder burning generates2, CO and NOX, these are dirty
Dye object, which enters 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,
Land occupation is big, easily blocks, troublesome maintenance, catalyst life is short, needs to regularly replace, and the later period has solid waste to handle.
Though the multiple pollutants such as activated carbon process can remove simultaneously, dioxin, 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 processing, while in active carbon activating and regenerating, there is the generation of other exhaust gas, reabsorbs processing and need to increase investment and be processed into
This, along with activated-carbon device construction cost and operating cost are very high, investment is big, and land occupation is wide, complicated for operation, environment protection treating
Investment is big and benefit is low, and pelletizing flue gas ton mine processing cost is higher.
In conclusion following problems exist in the prior art: investment is big, and treatment process increases pollutant emission.
Summary of the invention
The present invention provides a kind of pelletizing denitration method for flue gas, invests big, treatment process increasing to solve existing method of denitration
The problem of adding pollutant emission.
For this purpose, the present invention proposes that a kind of pelletizing denitration method for flue gas, the pelletizing denitration method for flue gas include:
Step A: the reducing agent of liquid is blown into the flue between pellet chain combing machines and pelletizing rotary kiln；
Step B: the drop that the reducing agent of blowing is formed is gasified as ammonia using fume high-temperature in flue；
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: so that remaining unreacted ammonia and flue gas in step C is entered ammonia process desulfuration tower together, recycled.
Further, in step D, remaining unreacted ammonia and pelletizing flue gas are by pipeline, into the ammonia process of desulfurization
The ammonium hydroxide of tower, the cooled water of the unreacted ammonia of residue or 0.1% ~ 15% concentration is 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 aperture, install atomizer or
Spray gun, nozzle quantity are n(n >=1) it is a, the reducing agent is delivered to by the atomizer or spray gun by pipeline, is utilized
Atomizer or spray gun, by high pressure blow smelting operation, form equally distributed mist to the reducing agent is blown inside flue in flue
Change drop.
Further, the setting that each atomizer is able to rotate in the flue, each atomizer can and flue
Airflow direction forms adverse current or fair current injection method.
Further, each atomizer and flue gas flow to angle and are able to carry out 360 adjustings.
Further, the blowing 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 concentration according to ammonia and carry out ratio control blowing.
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 is 850 ~ 1200 DEG C, when reaction
Between be 1 ~ 10s, the reaction time is converted into according to drying grate length and wind speed, so that nitrogen oxides is reduced to nitrogen and water, instead
Nitrogen after answering enters desulphurization system with flue gas, passes through desulfuration chimney together outlet.
It further, is rectangle in the section of the flue, the side wall of the flue is divided into top surface, bottom surface and is located at top surface
Two sides between bottom surface, the atomizer are mounted on top surface and two sides.
Further, in step A, concentration be 5 ~ 35% ammonium hydroxide from tank used for storing ammonia by pipeline, using compressed air to
Ammonium hydroxide is sprayed in 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 without additional thermal energy substantially, 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 aperture, 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 that the present invention shares ammonia method desulfurizing system carries out storage ammonium hydroxide or dilutes liquefied ammonia, and infrastructure investment is few,
Save land occupation.
The present invention, which automates, adjusts atomizer spray flow, effectively improves the efficiency of denitration, saves the consumption of reducing agent.
The present invention is further absorbed by ammonia method desulfurizing system without remaining ammonia escape, the complete ammonia of unreacted,
Entire denitrification process is innoxious.
Detailed description of the invention
Fig. 1 is the operation principle schematic diagram of pelletizing denitration method for flue gas of the invention；
Fig. 2 is the schematic diagram that flue cross section of the invention installs nozzle.
Drawing reference numeral explanation:
1, pellet chain combing machines；2, aperture；3, flue；4, pelletizing rotary kiln；5, ammonia process desulfuration tower (also referred to as desulfurizing tower)；6, cigarette
Chimney；7, gas gathering mask；8, electric precipitator；9, main exhauster；10, tank used for storing ammonia；11, compressed air cylinder；12, finished bin；
101, preheating section；102, dryer section；201, it pumps；202, counter flow controller；203, flow control valve；204, pressure control
Valve processed；401, gas-fired nozzle；
A, side wall；B, atomizer；C, first pipe；D, second pipe.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed
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 into the flue 3 between pellet chain combing machines 1 and pelletizing rotary kiln 4；
Step B: the drop that the reducing agent of blowing is formed is gasified as ammonia using fume high-temperature in flue 3；
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: so that remaining unreacted ammonia and flue gas is entered ammonia process desulfuration tower 5 together, recycled.
It is further: in flue 3(, that is, pellet chain combing machines preheating section tail end flue) punching installation mist on the refractory brick of side wall
Change nozzle B, all punches setting aperture 2 in entire flue bending section place and 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 aperture is 1 ~ 5cm more slightly larger than atomizer B, often
A 2 pitch-row interval of aperture 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,
I.e. pellet chain combing machines preheating section connection pelletizing rotary kiln between flue turn upwards towards, ammonia air-flow transfer when and enter rotary kiln
When flue gas occur turbulent flow, ammonia and flue gas are mixed 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, can the blowing direction to nozzle adjusted up and down；It is sprayed in installation
Omnidirectional's adjusting is carried out to nozzle blowing direction according to blowing atomization coverage effect when mouth, guarantees the nozzle atomization drop energy in three faces
Enough entire flue interfaces of uniform fold.
Further: the tank used for storing ammonia 10 is that desulphurization system is original or independent tank used for storing ammonia, is connected by second pipe D
To atomizer B, flow control valve is set up before connecting atomizer, 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 the reactional equation of ammonia and nitrogen oxides, artificial settings is pressed
It is that 1 ~ 2:1 carries out blowing liquefied ammonia or ammonium hydroxide, and has artificial or automatic blowing according to the molar ratio of ammonium hydroxide and reaction of nitrogen oxides
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 first pipe C to ammonia method desulfurizing system, for example, being absorbed again by ammonium hydroxide into desulfurizing tower
It is used as desulfurizing agent reuse afterwards.
The ammonia method desulfurizing system is the processing system for removing sulfur dioxide in flue gas, which passes through cigarette
Road connects pelletizing rotary kiln outlet, and entire flue inside is closed.
The course of work of the invention is: the side wall of the connection flue between pellet chain combing machines preheating section and pelletizing rotary kiln
Liquid atomizing nozzle is installed in three face apertures, and atomizer can be adjusted with omnidirectional, by measuring the concentration of NO in flue gas certainly
The amount of injection that is dynamic or manually adjusting liquefied ammonia or ammonium hydroxide；The ammonium hydroxide that concentration is 5 ~ 35% is passed through pipeline, benefit from desulphurization system ammonia water tank
Ammonium hydroxide is sprayed into flue with compressed air, the ammonium hydroxide drop after atomization makes full use of the high-temperature flue gas that pelletizing rotary kiln flows through,
It is directly ammonia the gasification of reducing agent drop, while using flue gas high flow rate characteristic in flue, ammonia and flue gas is made to transfer
The turbulent flow formed in flue, is sufficiently mixed ammonia and flue gas, enters in pellet chain combing machines preheating section flue in mixer, by
Reach 850 ~ 1200 DEG C of hot environment, for example, 950 degree of high temperature, ammonia and ball in gas-fired formation temperature in rotary kiln
Group's nitrogen oxides in effluent generates reduction reaction, and nitrogen oxides is reduced to nitrogen and water, unreacted ammonia with flue gas together
The flue gas of discharge, discharge enters ammonia method desulfurizing system by flue, and ammonia is desulfurized the ammonium hydroxide that in-system concentration is 0.1 ~ 5% and inhales
It receives, is re-used as desulfurizing agent and carries out using accomplishing 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 aperture 2 is arranged in the side wall A on flue 3, installs multiple groups high pressure atomizing nozzle B,
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 first pipe C, while pumping 201
By second pipe D and by tank used for storing ammonia 10 liquefied ammonia or ammonium hydroxide be delivered to high pressure atomizing nozzle B, in the blowing of pressure-air
Under, liquefied ammonia or ammonia water and air are 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 blowing 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℃。
The lesser liquid particles of a large amount of diameters are formed after nozzle B blowing, fine drop gasification is ammonia in flue 3, together
The flue gas stream of high speed, forms turbulent flow in flue in Shi Liyong flue 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, carries out flue gas collection 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.
Through the invention, pelletizing nitrogen oxides in effluent concentration is finally reduced.The present invention has small investment, and land occupation is few, fortune
It seeks at low cost, does not generate the advantages such as other pernicious gases.
The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the 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 changes and modifications, should belong to the scope of protection of the invention under the premise of the conceptions and principles of invention.
Claims (7)
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: liquefied ammonia or ammonium hydroxide reducing agent are blown into the flue between pellet chain combing machines and pelletizing rotary kiln；
Step B: the drop that the reducing agent of blowing is formed is gasified as ammonia using fume high-temperature in flue；
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: so that remaining unreacted ammonia and flue gas in step C is entered ammonia process desulfuration tower together, recycled；
The side wall of flue between pellet chain combing machines and rotary kiln carries out aperture, installs atomizer or spray gun, nozzle quantity
It is n, the reducing agent is delivered to the atomizer or spray gun by pipeline, utilizes atomizer or spray gun by n >=1
It is blown the reducing agent inside to flue, by the high pressure blow smelting operation of pressure 0.55-0.8MPa, is formed in flue equally distributed
Atomized drop；
In step C, the flue is transferred l-shaped, and the ammonia and flue gas form turbulent flow in the flue of turnover, the ammonia and
The environment temperature that redox reaction occurs for the nitrogen oxides in flue gas is 850 ~ 1200 DEG C, and the reaction time is 1 ~ 10s, makes nitrogen oxygen
Compound is reduced to nitrogen and water, and the nitrogen after reaction is with flue gas outlet.
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 setting that each atomizer is able to rotate exists
In the flue, each atomizer can form adverse current or fair current injection method with flue gas stream direction.
4. pelletizing denitration method for flue gas as claimed in claim 3, which is characterized in that each atomizer and flue gas flow direction
Angle is able to carry out 360 degree of adjustings.
5. pelletizing denitration method for flue gas as claimed in claim 3, which is characterized in that the blowing 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, correspond to NO according to ammoniaXIt rubs
Your concentration carries out ratio control blowing.
6. pelletizing denitration method for flue gas as claimed in claim 2, which is characterized in that the section of the flue be rectangle, institute
The side wall for stating flue is divided into top surface, bottom surface and two sides between top and bottom, the atomizer and is mounted on top
On face and two sides.
7. pelletizing denitration method for flue gas as claimed in claim 2, which is characterized in that in step A, the ammonia for being 5 ~ 35% concentration
Water, by pipeline, sprays ammonium hydroxide into flue using compressed air from tank used for storing ammonia.
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| CN201810087604.2A CN108246075B (en) | 2018-01-30 | 2018-01-30 | Pelletizing denitration method for flue gas |
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Families Citing this family (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 |
| 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 |
| 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 |
| 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 |
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 |
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