CN105879641B - A kind of lye jet atomization removes the device and method of sulfur trioxide in flue gas - Google Patents
A kind of lye jet atomization removes the device and method of sulfur trioxide in flue gas Download PDFInfo
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- CN105879641B CN105879641B CN201610384872.1A CN201610384872A CN105879641B CN 105879641 B CN105879641 B CN 105879641B CN 201610384872 A CN201610384872 A CN 201610384872A CN 105879641 B CN105879641 B CN 105879641B
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- flue gas
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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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- 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
Abstract
The invention discloses the device and methods of sulfur trioxide in a kind of lye jet atomization removing flue gas, which includes alkaline absorbent atomising device, is equipped with twin spray gun；Out of stock gas approach, one end are smoke inlet, and the other end is exhanst gas outlet；Twin spray gun is mounted in out of stock gas approach；Reducing agent ejecting gun, reducing agent ejecting gun are mounted in out of stock gas approach；Spoiler, spoiler are fixed in out of stock gas approach, and the angle with the central axes of out of stock gas approach is 25 degree~75 degree；The central axes of reducing agent ejecting gun are vertical with spoiler plane；Twin spray gun is mounted on the top of spoiler；Out of stock reactor, out of stock reactor are connected to the exhanst gas outlet of out of stock gas approach.It is an object of the present invention to a kind of high efficiency SO of flue gas front end3Removing sulfuldioxide can effectively remove the sulfur trioxide in flue gas, reduce SO3Concentration reduces its harm to denitrification apparatus, air preheater, while reducing the harm to environment.
Description
Technical field
The invention belongs to atmosphere pollution Treatment process fields, more particularly in a kind of lye jet atomization removing flue gas
The device and method of sulfur trioxide.
Background technique
A large amount of pollutant is generated in coal-fired process, wherein due to containing a certain amount of element sulphur in coal, it is final
Certain density SO can be generated in the flue gas of discharge2And SO3。
SO3Formation mechanism mainly include following part, in the combustion process of burner hearth, a part of element sulphur is direct in coal
It is converted into SO3；Flue gas is in back-end surfaces heat transfer process, by metal pipe-wall, the catalysed oxidn of flying dust, a part of SO2
SO can be oxidized to3；For increasing the unit of SCR denitration device newly, denitrating catalyst also has very strong catalysed oxidn, makes
Obtain a part of SO2It is oxidized to SO3.Generally for the coal unit for not installing denitrification apparatus, SO3Production rate account for total sulfur content
1%；For installing the unit of SCR denitration device, SO3Production rate it is higher, can usually account for the 1.5~2% of total sulfur content.
SO3Harm be mainly manifested in following aspect: first, SO3Concentration increase, lead to the generation concentration of ammonium hydrogen sulfate
Increase, causes the minimum continuous spray ammonia temperature of denitrification apparatus to increase, cause SCR denitration device that can not throw under low loading conditions
Fortune, the availability decline of denitrification apparatus.Second, SO3Acid dew point in flue gas is caused to increase in the low-temperature zone of air preheater, air preheater
Low-temperature corrosion is serious, and under SCR service condition, the generation of ammonium hydrogen sulfate be easy to cause air preheater to block, and causes the fortune of air preheater
Row resistance rises, equipment life decline.Third, SO3Into after wet desulphurization, aerosol easy to form causes chimney finally to arrange
" blue smoke ", " plume hangover " phenomenon are put, sense organ is very poor, while SO3Direct emission be to cause the main source of acid rain.
SO at present3Main removing means are Wet Flue Gas Desulfurization Technique, wet static dedusting technology etc., but above-mentioned technology is arranged
After electrostatic precipitation, it is ensured that be finally discharged into the SO of atmosphere3Amount reduces, but can not eliminate SO3To front end denitrification apparatus
With the harm of air preheater.
Summary of the invention
The first object of the present invention is to provide the device of sulfur trioxide in a kind of lye jet atomization removing flue gas, to solve
Existing device can not eliminate SO at present3The technical issues of to the harm of front end denitrification apparatus and air preheater.
The second object of the present invention is to provide a kind of method that lye jet atomization removes sulfur trioxide in flue gas, to solve
Existing method can not eliminate SO at present3To the Hazard Technology problem of front end denitrification apparatus and air preheater.
In order to realize above-mentioned first purpose, the present invention provides a kind of dress of sulfur trioxide in lye jet atomization removing flue gas
It sets comprising:
Alkaline absorbent atomising device, the alkaline absorbent atomising device include:
Absorbent storage tank, the absorbent storage tank is for storing liquid sulphur trioxide absorbent；
Absorbent delivery pump, the absorbent delivery pump is equipped with absorbent conveying pump intake and absorbent conveys pump discharge；
Absorbent conveying pump intake is connected to by pipeline with absorbent storage tank；
Flow control valve, flow control valve pass through pipeline and absorbent delivery pump outlet；
Twin spray gun, twin spray gun and flow control valve pass through pipeline connection；Lye jet atomization is de-
Except the device of sulfur trioxide in flue gas further include:
One end of denitration gas approach, the denitration gas approach is smoke inlet, and the other end is exhanst gas outlet；It is described double
Fluid atomizing spray gun is mounted in the denitration gas approach；
Reducing agent ejecting gun, the reducing agent ejecting gun are mounted in the denitration gas approach；
Spoiler, the spoiler are fixed in the denitration gas approach, the folder with the central axes of denitration gas approach
Angle is 25 degree~75 degree；The central axes of the reducing agent ejecting gun are vertical with spoiler plane；The twin spray gun peace
Mounted in the top of spoiler；
Benitration reactor, the Benitration reactor are connected to the exhanst gas outlet of denitration gas approach.
The device of sulfur trioxide in present invention lye jet atomization removing flue gas as described above, further, alkalinity absorbs
Agent atomising device further includes alkaline absorbent dilution device, the alkaline absorbent dilution device and the pipeline connection.
The device of sulfur trioxide further includes further sky in present invention lye jet atomization removing flue gas as described above
Air preheater, the air preheater are connected to the gas outlet of Benitration reactor.
In order to realize above-mentioned second purpose, the present invention provides a kind of side of sulfur trioxide in lye jet atomization removing flue gas
Method is carried out using the device of sulfur trioxide in as above described in any item lye jet atomization removing flue gases, comprising the following steps:
Liquid sulphur trioxide absorbent is stored in liquid form in absorbent storage tank, is delivered to by absorbent delivery pump
Twin spray gun, by the flow of Flux Valve Control absorbent, sulfur trioxide absorption agent is sprayed by twin
It is sprayed after rifle atomization；Flue gas is entered by the smoke inlet of denitration gas approach, the effect by spoiler and reducing agent ejecting gun
Form vortex；Sulfur trioxide absorption agent is sprayed into and is vortexed by twin spray gun, and realization flue gas is equal with sulfur trioxide absorption agent
SO is completed in even blending3Elimination reaction.
The method of sulfur trioxide in present invention lye jet atomization removing flue gas as described above, it is preferable that the liquid
Sulfur trioxide absorption agent is aqueous slkali.
The method of sulfur trioxide in present invention lye jet atomization as described above removing flue gas, it is preferable that the alkali is
Sodium carbonate Na2CO3, sodium sulfite Na2SO3With sodium bicarbonate NaHCO3One of, two or more；The mass concentration of aqueous slkali
5~40%.
The method of sulfur trioxide in present invention lye jet atomization as described above removing flue gas, it is preferable that aqueous slkali with
The form of atomized drop is entered by twin lance ejection and contains SO3Flue gas in, mist droplet particle size range be 10 μm~150 μ
m。
The method of sulfur trioxide in present invention lye jet atomization removing flue gas as described above, it is preferable that with Na+:SO3
SO in meter, aqueous slkali and flue gas3The chemical molar equivalent ratio of removing amount is 1.0~4.0.
The method of sulfur trioxide in present invention lye jet atomization removing flue gas as described above, it is preferable that three oxygen of liquid
Changing residence time of the sulfur absorbing agent in flue gas is 0.1~10 second, 120~450 DEG C of flue-gas temperature.
The beneficial effects of the present invention are:
It is an object of the present invention to a kind of high efficiency SO of flue gas front end3Removing sulfuldioxide can effectively remove three in flue gas
Sulfur oxide reduces SO3Concentration reduces its harm to denitrification apparatus, air preheater, while reducing the harm to environment.
1、SO3Removal efficiency is high.Using twin spray gun by after the atomization of liquid sulphur trioxide absorbent, it is easily formed
The drop of small particle, suitable stoichiometric ratio, the residence time, it is mixed uniformly under the conditions of, in absorbent droplet and flue gas
SO3The quick mass transfer of carry out and chemical reaction process, high removal efficiency may be implemented.
2, system is simple, high with denitrating system integrated level, to boiler without negative effect.This technology is by sorbent injection position
It is arranged in SCR denitration device entrance, reinforces absorbent using the mixing arrangement of denitrification reducing agent and (is gone back with uniformly mixing for flue gas
Former agent ejecting gun and spoiler), it realizes the combination with denitrification apparatus, realizes SO3Efficient removal, SO is not only effectively relieved3
Harm to denitrating catalyst and air preheater, and product be can be by the solid salt that downstream deduster traps, to boiler machine
Group is without negative effect.
3, project cost and operating cost are low.The technical equipment is simplified, and investment is low, and running alkali lye consumption product are normal
The industrial chemicals of rule is easy to purchase, and cheap, operating cost is low, compared to SO such as wet-esps3Equipment is removed, in engineering
There is greater advantage in terms of cost and operating cost.
In addition, removing SO with solid particle absorbent3Process ration the invention has the following advantages that
Using lye atomization process, the absorbent of outsourcing can be dissolved into liquid, be atomized later using double-current spray gun body
Liquid, therefore the partial size of absorbent is not required；Size droplet diameter after the atomization of double-current spray gun body is uniform and easily controllable,
It is easy to implement higher removal efficiency；And the method directly sprayed using solid particle, the solid for needing to purchase specified partial size are inhaled
It receives agent (price is higher), or increases and grind system (system complex), coarse granule is milled into fine particle.Skill is atomized using liquid
Art, drop flash to rapidly solid particle, and since gas discharges in evaporation process, solid particles surface will form certain micropore
Structure improves response area, is improved efficiency by helping.The particle surface smoother that dry method uses, specific surface area are lower.It is dry
The process of pneumatic transmission of powder is easy to appear the problems such as blocking, abrasion, and reliability is poor.It is conveyed using liquid, skill level, reliably
Property it is high.
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 that the lye jet atomization of an embodiment of the present invention removes the device and method signal of sulfur trioxide in flue gas
Figure；
The partial enlargement diagram that Fig. 2 is 1；
Fig. 3 is the schematic top plan view of Fig. 2.
In attached drawing, parts list represented by the reference numerals are as follows:
1, liquid sulphur trioxide absorbent, 2, absorbent storage tank, 3, absorbent delivery pump, 4, alkaline absorbent dilution dress
It sets, 5, flow control valve, 6, twin spray gun, 7, denitration gas approach, 8, Benitration reactor, 9, spoiler, 10, flue gas
Vortex, 11, reducing agent ejecting gun, 12, former flue gas, 13, neat stress.
Specific embodiment
Hereinafter, describe with reference to the accompanying drawings in lye jet atomization removing flue gas of the invention the device of sulfur trioxide and
The embodiment of method.
The embodiment recorded herein is specific specific embodiment of the invention, for illustrating design of the invention,
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 what is recorded herein
Outside embodiment, those skilled in the art can also based on the claim of this application book and specification disclosure of that using aobvious and
The other technical solutions being clear to, these technical solutions include using any obvious to making for the embodiment recorded herein
The technical solution of substitutions and modifications.
The attached drawing of this specification is schematic diagram, aids in illustrating design of the invention, it is schematically indicated the shape of each section
And its correlation.It note that for the ease of clearly showing the structure of each component of the embodiment of the present invention, between each attached drawing
Do not drawn according to identical ratio.Identical reference marker is for indicating identical part.
The purpose of the present invention is combine SO3Reactivity in different temperatures section, using atomization technique by alkaline solution
Absorbent (sodium carbonate Na2CO3, sodium sulfite Na2SO3, sodium bicarbonate NaHCO3Mixed solution) it is injected into SCR denitration entrance cigarette
In road, is sufficiently blended with flue gas, pass through alkaline absorbent solution and SO3Between chemical reaction, remove flue gas in SO3。
Main chemical reactions according to the present invention are as follows:
Na2CO3+SO3=Na2SO4+CO2
Na2SO3+SO3=Na2SO4+SO2
NaHCO3+SO3=NaHSO4+CO2
Above-mentioned different alkaline absorbent (sodium carbonate Na2CO3, sodium sulfite Na2SO3, sodium bicarbonate NaHCO3It mixes molten
Liquid) it can be with SO3It chemically reacts, but reaction rate, reactivity have biggish difference.According to SO3Concentration and total cigarette
Tolerance controls the straying quatity of absorbent, realizes SO3Efficient removal.SO in flue gas3Within the scope of 0~400ppm of concentration, it can be achieved that
SO395% highest removal efficiency.
Alkaline absorbent is to other pollutants (SO in flue gas2, HCl, HF etc.) have certain removing effect, for not
Same flue gas composition needs to combine proportion (the sodium carbonate Na to alkaline absorbent2CO3, sodium sulfite Na2SO3, sodium bicarbonate
NaHCO3Mixed solution) it is adjusted, realize absorbent to SO3The efficient removal of selectivity, while reducing the consumption of absorbent.
To realize SO high in biggish flue cross section3Removal efficiency, this technology require absorbent droplet uniformly to blend with flue gas,
Therefore there is high requirement to drop atomizing effect, Flow Field Distribution.
Fig. 1, Fig. 2 and Fig. 3 show the dress of sulfur trioxide in the lye jet atomization removing flue gas of an embodiment of the present invention
It sets comprising:
Alkaline absorbent atomising device, the alkaline absorbent atomising device include:
Absorbent storage tank 2, the absorbent storage tank is for storing liquid sulphur trioxide absorbent 1；
Absorbent delivery pump 3, the absorbent delivery pump 3 is equipped with absorbent conveying pump intake and absorbent conveying pumps out
Mouthful；Absorbent conveying pump intake is connected to by pipeline with absorbent storage tank 2；
Flow control valve 5, flow control valve 5 pass through pipeline and absorbent delivery pump outlet；
Twin spray gun 6, twin spray gun 6 and flow control valve 5 pass through pipeline connection；Lye jet atomization
Remove the device of sulfur trioxide in flue gas further include:
One end of denitration gas approach 7, the denitration gas approach is smoke inlet, and the other end is exhanst gas outlet；It is described
Twin spray gun 6 is mounted in the denitration gas approach 7；
Reducing agent ejecting gun 11, the reducing agent ejecting gun 11 are mounted in the denitration gas approach 7；
Spoiler 9, the spoiler 9 are fixed in the denitration gas approach 7, the central axes with denitration gas approach 7
Angle be 25 degree~75 degree；The central axes of the reducing agent ejecting gun 11 are vertical with 9 plane of spoiler；The twin
Spray gun 6 is mounted on the top of spoiler 9；
Benitration reactor 8, the Benitration reactor 8 are connected to the exhanst gas outlet of denitration gas approach 7.
It in a specific embodiment, further include air preheater, the outlet of the air preheater and Benitration reactor
Mouth connection.
In the lye jet atomization removing flue gas of the above embodiment of the present invention in the device of sulfur trioxide, in order to absorption
Sulfur trioxide absorption agent in agent storage tank carries out on-line dilution, is further improved to above-described embodiment, alkaline absorbent atomization dress
Setting further includes alkaline absorbent dilution device 4, the alkaline absorbent dilution device 4 and the pipeline connection.By adjusting alkali
Property absorbent dilution device 4 is delivered to the amount of the clear water of pipeline, to control the concentration after sulfur trioxide absorption dilution agent.
It is removed using the sulfur trioxide that the device of sulfur trioxide in lye jet atomization as described above removing flue gas carries out
Method, comprising the following steps:
Liquid sulphur trioxide absorbent is stored in liquid form in absorbent storage tank, is delivered to by absorbent delivery pump
Twin spray gun, by the flow of Flux Valve Control absorbent, sulfur trioxide absorption agent is sprayed by twin
It is sprayed after rifle atomization；Flue gas is entered by the smoke inlet of denitration gas approach, the effect by spoiler and reducing agent ejecting gun
Form vortex；Sulfur trioxide absorption agent is sprayed into and is vortexed by twin spray gun, and realization flue gas is equal with sulfur trioxide absorption agent
SO is completed in even blending3Elimination reaction.
In a kind of preferred embodiment, the liquid sulphur trioxide absorbent is aqueous slkali.In preferred embodiment
In, the alkali is sodium carbonate Na2CO3, sodium sulfite Na2SO3With sodium bicarbonate NaHCO3One of, two or more；Alkali soluble
The mass concentration 5~40% of liquid.
In a kind of preferred embodiment, aqueous slkali is entered by twin lance ejection in the form of atomized drop and is contained
SO3Flue gas in, mist droplet particle size range be 10 μm~150 μm.
In a kind of preferred embodiment, with Na+:SO3SO in meter, aqueous slkali and flue gas3The chemical molar equivalent of removing amount
Than being 1.0~4.0.
In a kind of preferred embodiment, residence time of the liquid sulphur trioxide absorbent in flue gas is 0.1~10 second,
120~450 DEG C of flue-gas temperature.
Embodiment 1
Below by taking certain 300MW coal unit as an example, in conjunction with attached drawing to specific structure of the invention, working principle and worked
Journey is further described.
380 DEG C of denitration entrance flue gas temperature, SO3Concentration 40ppm, SO2Concentration 2000ppm, according to the basic parameter of flue gas,
The quality proportioning of the alkaline solution used is (sodium carbonate Na2CO3: sodium sulfite Na2SO3: sodium bicarbonate NaHCO3=1:2:1), benefit
It is 30% with the total salt quality concentration for preparing the solution completed.
According to solution ratio and smoke components, the arrangement of combined process device, it is desirable that realize 95% SO3Removal efficiency, really
Fixed total chemical reaction equivalent proportion Na+:SO3=2:1 guarantees SO by higher stoichiometric ratio3High removal efficiency.
As shown in Figure 1, the SO in a kind of lye injection removing flue gas3Process system, liquid sulphur trioxide absorbent with
Liquid form is stored in absorbent storage tank, is delivered to twin spray gun by absorbent delivery pump, is adjusted by flow
Valve controls the flow of absorbent, and sulfur trioxide absorption agent is sprayed after the atomization of twin spray gun；Former flue gas 12 is by denitration
The smoke inlet of gas approach enters, and the effect by spoiler and reducing agent ejecting gun forms flue gas vortex 10；Two-fluid mist
Change spray gun and sulfur trioxide absorption agent is sprayed into vortex, realize the uniform blending of flue gas and sulfur trioxide absorption agent, completes SO3It is de-
Except reaction.Final neat stress 13 is discharged by Benitration reactor 8.
It is illustrated in figure 2 the specific embodiment of lye spray gun.Denitration gas approach section is the rectangle of 2.6mx11m, altogether
8 groups of twin spray guns 6 are configured, guarantee that lye injection coverage area is sufficiently large.Lye atomizing particle size is 50 μm, by spray gun cloth
It sets at spoiler 9, flue gas forms flue gas vortex 10 after spoiler, and volume inhales periphery flue gas, reinforces alkaline droplet and flue gas
Blending, guarantee reducing agent and SO3Sufficiently reaction.
The SO of this case history3Removal efficiency 96%, and flue gas flying dust total amount matter is accounted for by the solid particle that absorbent generates
Ratio is measured less than 0.5%, the denitrating catalyst in downstream will not be produced bigger effect.
Embodiment 2
The present embodiment is the difference from embodiment 1 is that 320 DEG C of denitration entrance flue gas temperature, SO3Content 20ppm is being designed
Under the conditions of, SO3Removal efficiency 85%, use the mix proportion scheme of lye absorbent for (sodium carbonate Na2CO3: sodium sulfite Na2SO3
=1:1.5), total salt quality concentration of lye is 20%, and the atomizing particle size of alkaline absorbent is 40 μm, designs stoichiometric ratio Na+:
SO3=1.5:1.According to actual measurement, under the operating condition that actually puts into operation, SO3Removal efficiency be 88%.
Each technical characteristic of above-mentioned disclosure is not limited to disclosed and other feature combination, and those skilled in the art are also
Can carry out other combinations between each technical characteristic according to the purpose of invention, be subject to realize the present invention purpose.
Claims (8)
1. the device of sulfur trioxide in a kind of lye jet atomization removing flue gas characterized by comprising
Alkaline absorbent atomising device, the alkaline absorbent atomising device include:
Absorbent storage tank, the absorbent storage tank is for storing liquid sulphur trioxide absorbent；
Absorbent delivery pump, the absorbent delivery pump is equipped with absorbent conveying pump intake and absorbent conveys pump discharge；It absorbs
Agent conveying pump intake is connected to by pipeline with absorbent storage tank；
Flow control valve, flow control valve pass through pipeline and absorbent delivery pump outlet；
Twin spray gun, twin spray gun and flow control valve pass through pipeline connection；Lye jet atomization removes cigarette
The device of sulfur trioxide in gas further include:
One end of denitration gas approach, the denitration gas approach is smoke inlet, and the other end is exhanst gas outlet；The two-fluid
Atomizing lance is mounted in the denitration gas approach；
Reducing agent ejecting gun, the reducing agent ejecting gun are mounted in the denitration gas approach；
Spoiler, the spoiler are fixed in the denitration gas approach, and the angle with the central axes of denitration gas approach is
25 degree~75 degree；The central axes of the reducing agent ejecting gun are vertical with spoiler plane；The twin spray gun is mounted on
The top of spoiler；
Benitration reactor, the Benitration reactor are connected to the exhanst gas outlet of denitration gas approach；
Alkaline absorbent atomising device further includes alkaline absorbent dilution device, the alkaline absorbent dilution device and the pipe
Road connection；
Lye jet atomization removes the device of sulfur trioxide in flue gas, further includes air preheater, the air preheater and de-
The gas outlet of nitre reactor is connected to.
2. the method that lye jet atomization removes sulfur trioxide in flue gas, which is characterized in that utilize lye described in claim 1
The device that jet atomization removes sulfur trioxide in flue gas carries out, comprising the following steps:
Liquid sulphur trioxide absorbent is stored in liquid form in absorbent storage tank, is delivered to double fluid by absorbent delivery pump
Body atomizing lance, by the flow of Flux Valve Control absorbent, twin spray gun mist is passed through in sulfur trioxide absorption agent
It is sprayed after change；Flue gas is entered by the smoke inlet of denitration gas approach, and the effect by spoiler and reducing agent ejecting gun is formed
Vortex；Sulfur trioxide absorption agent is sprayed into and is vortexed by twin spray gun, realizes that flue gas is mixed with the uniform of sulfur trioxide absorption agent
It is mixed, complete SO3Elimination reaction.
3. the method for sulfur trioxide in lye jet atomization removing flue gas according to claim 2, which is characterized in that described
Liquid sulphur trioxide absorbent is aqueous slkali.
4. the method for sulfur trioxide in lye jet atomization removing flue gas according to claim 3, which is characterized in that described
Alkali is sodium carbonate Na2CO3, sodium sulfite Na2SO3With sodium bicarbonate NaHCO3One of, two or more；The quality of aqueous slkali
Concentration 5~40%.
5. the method for sulfur trioxide in lye jet atomization removing flue gas according to claim 4, which is characterized in that alkali soluble
Liquid is entered by twin lance ejection in the form of atomized drop and contains SO3Flue gas in, mist droplet particle size range be 10 μm~
150μm。
6. the method for sulfur trioxide in lye jet atomization removing flue gas according to claim 4 or 5, which is characterized in that
With Na+:SO3SO in meter, aqueous slkali and flue gas3The chemical molar equivalent ratio of removing amount is 1.0~4.0.
7. the method for sulfur trioxide in lye jet atomization removing flue gas according to claim 4 or 5, which is characterized in that
Residence time of the liquid sulphur trioxide absorbent in flue gas is 0.1~10 second, 120~450 DEG C of flue-gas temperature.
8. the method for sulfur trioxide in lye jet atomization removing flue gas according to claim 6, which is characterized in that liquid
Residence time of the sulfur trioxide absorption agent in flue gas is 0.1~10 second, 120~450 DEG C of flue-gas temperature.
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106345244A (en) * | 2016-10-17 | 2017-01-25 | 浙江大学 | Device and method for removing sulfur trioxide from coal-fired flue gas |
| CN106492603B (en) * | 2016-11-21 | 2019-03-01 | 西安交通大学 | It is a kind of for removing the device of sulfur trioxide before air preheater |
| CN107029546A (en) * | 2017-04-20 | 2017-08-11 | 北京国电龙源环保工程有限公司 | SO based on alkaline absorbent fine particle3Removing system and its removal methods |
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