CN206152631U - Coal -fired flue gas SO3 step degree of depth desorption system - Google Patents
Coal -fired flue gas SO3 step degree of depth desorption system Download PDFInfo
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- CN206152631U CN206152631U CN201621114331.9U CN201621114331U CN206152631U CN 206152631 U CN206152631 U CN 206152631U CN 201621114331 U CN201621114331 U CN 201621114331U CN 206152631 U CN206152631 U CN 206152631U
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- air preheater
- temperature
- flue gas
- coal
- electrostatic precipitator
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- 239000003546 flue gas Substances 0.000 title claims abstract description 64
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000003245 coal Substances 0.000 title abstract description 10
- 238000003795 desorption Methods 0.000 title abstract 4
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 32
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 21
- 239000007924 injection Substances 0.000 claims abstract description 21
- 230000002708 enhancing effect Effects 0.000 claims description 36
- 239000003054 catalyst Substances 0.000 claims description 10
- 239000002594 sorbent Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000005367 electrostatic precipitation Methods 0.000 claims 1
- 239000002250 absorbent Substances 0.000 abstract description 16
- 230000002745 absorbent Effects 0.000 abstract description 16
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 9
- 239000000428 dust Substances 0.000 description 8
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000001925 catabolic effect Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 108090000623 proteins and genes Proteins 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 241000607479 Yersinia pestis Species 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 241001061906 Caragana Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 description 1
- 229910000020 calcium bicarbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to a coal -fired flue gas SO3 step degree of depth desorption system, the system includes SCR denitrification facility, alkaline absorbent injection apparatus, air preheater, the increase device that adjusts the temperature, electrostatic precipitator, desulfurizing tower and wet -type electrostatic precipitator, the increase device that adjusts the temperature includes the cooling section and the section that heaies up, SCR denitrification facility, air preheater, the increase device cooling section that adjusts the temperature, electrostatic precipitator, desulfurizing tower, wet -type electrostatic precipitator, the increase device that adjusts the temperature intensification section set up along flue gas desorption direction in order, before position that basicity absorbent injection apparatus set up is SCR denitrification facility, after the SCR denitrification facility, before the air preheater, or after the air preheater, before the increase device cooling section that adjusts the temperature. The utility model discloses a SO3 of each pollutant control equipment in to the flue gas carries out step degree of depth desorption, realizes that SO3's effluent concentration is less than 5mgNm3.
Description
Technical field
The utility model belongs to coal-fired flue-gas pollutant removing technical field, concretely relates to a kind of coal-fired flue-gas
SO3Step deep removal system.
Background technology
Coal-fired thermal power generation is the principal mode of the current electrical energy production of China, and China's thermoelectricity generated energy is up to gross generation
More than 80%, wherein the electric installed capacity based on fire coal accounts for total capacity 75%.China's total energy consumption 36.1 hundred million in 2014
Ton standard coal, consumption of coal accounts for the 66% of total energy consumption.Energy supply general layout of the China based on coal is following one
Will not change in the section time.
In coal-burning power plant, SO3Source mainly have two aspects:One is that in combustion, what is contained in coal is flammable
Property element sulphur burning generate SO2Afterwards, part SO2It is further oxided generation SO3;Two is at selective-catalytic-reduction denitrified (SCR)
During, part SO2In the presence of SCR catalyst, SO is generated by catalysis oxidation3。
After SCR gas denitrifying technology large-scale applications, the SO in flue gas3Greatly increase, the harm for causing is also increasingly
Greatly:" Lan Yu " phenomenon is produced, as the SO in flue gas3" Lan Yu " phenomenon when concentration reaches 10~20ppm, just occurs;Cause sky
The dust stratification of pre- device, in air preheater, when flue-gas temperature is reduced to below acid dew point, condensation of sulfuric acid is attached on flying dust, forms tool
The sediment for having certain viscosity is deposited on air preheater surface, causes air preheater dust stratification and fouling;Generate ammonium hydrogen sulfate, SCR reactions
In device, at 300 DEG C or so, SO3Can be with NH3Reaction generates ammonium hydrogen sulfate, is deposited on catalyst surface, blocking catalyst hole, drop
The activity of low catalyst and life-span, the SO in air preheater, in the ammonia and flue gas escaped in SCR reactors3React generation
Ammonium hydrogen sulfate, the viscosity of ammonium hydrogen sulfate causes the surface that flying dust is deposited on air preheater to cause the blocking of air preheater.Particularly in combustion
In the case of burning high-sulfur coal, SO3Harm to power plant is more serious.
In existing pollution that caused by coal burning thing control equipment, also without specific environmental protection equipment to the SO in flue gas3Taken off
Remove, as environmental requirement is increasingly strict, need a kind of coal-fired flue-gas SO of exploitation badly3Removing system and control method, give full play to each
Pollutant catabolic gene is equipped to SO3Removing potentiality, lower flue gas in SO3Harm to power plant.
Utility model content
SO in order to overcome existing coal-fired flue-gas3The deficiency that control technology is present, particularly in the situation of burning high sulfur coal
Under, reduce SO3Harm to electric power factory equipment and environment, the utility model provides a kind of coal-fired flue-gas SO3Step deep removal system
System, gives full play to each pollutant catabolic gene and equips to SO3Removing potentiality, realize SO3Concentration of emission control in 5mg/Nm3Below.
A kind of coal-fired flue-gas SO3Step deep removal system, the system includes that SCR denitration device, alkaline absorbent spray
Injection device, air preheater, temperature adjustment enhancing device, electrostatic precipitator, desulfurizing tower and wet cottrell, the temperature adjustment enhancing device
Including temperature descending section and warming-up section, the SCR denitration device, air preheater, temperature adjustment enhancing device temperature descending section, electrostatic precipitator, desulfurization
Tower, wet cottrell, temperature adjustment enhancing device warming-up section are sequentially arranged along flue gas removing direction;The alkaline absorbent injection
Device arrange position be SCR denitration device before, after SCR denitration device, before air preheater, or after air preheater, temperature adjustment
Before enhancing device temperature descending section.
Preferably, being provided with three layers of catalyst in the SCR denitration device.Three layers low are arranged in SCR denitration device
SO2/SO3The catalyst of conversion ratio, SO2/SO3Conversion ratio is less than 0.8%, reduces when flue gas passes through SCR device, SO in flue gas2
To SO3Conversion, suppress SO3Generation.
Preferably, being provided with booster fan between the electrostatic precipitator and desulfurizing tower.
Coal-fired flue-gas from boiler out sequentially pass through afterwards SCR denitration device, air preheater, the temperature descending section of temperature adjustment enhancing device,
Electrostatic precipitator, booster fan, desulfurizing tower, wet cottrell, the warming-up section of temperature adjustment enhancing device, are finally arranged by chimney
It is empty.
Temperature adjustment enhancing device is divided into two sections:Temperature descending section and warming-up section;Wherein, the temperature descending section of temperature adjustment enhancing device is arranged on sky
After pre- device, flue gas make after temperature adjustment enhancing device enter electrostatic precipitator flue-gas temperature control flue gas acid dew point with
Under, the SO in flue gas3It is condensed into sulfuric acid mist and adsorbs on dust surface, removes after being caught by electrostatic precipitator, it is exhausted in flue gas
Most of SO3Removed by electrostatic precipitator.Desulfurizing tower is arranged on after electrostatic precipitator, on the one hand, by the washing of desulfurization slurry
Flue-gas temperature further declines, the SO in flue gas3Further condensation becomes big;On the other hand, to the spraying layer and demisting of desulfurizing tower
Device is optimized design, improves absorption tower slurries to SO in flue gas3Removal efficiency.Wet cottrell is arranged on desulfurizing tower
Afterwards, flue gas is after desulfurizing tower, SO3Mainly with H2SO4In the form of microlayer model, the diameter of its average grain 0.4 μm with
Under, belonging to sub-micron category, wet cottrell has very high capture rate to submicron particles, can effectively improve in flue gas
SO3Removal efficiency.
Alkaline absorbent injection apparatus can have three kinds of set-up modes:Alkalescence absorbs injection apparatus and is arranged on SCR denitration dress
Before putting, it is possible to decrease generation of the ammonium hydrogen sulfate in SCR catalyst upper surface;Alkalescence absorbs injection apparatus and is arranged on SCR denitration device
Afterwards, before air preheater, it is possible to decrease the SO in the ammonia and flue gas escaped in SCR reactors3React generation ammonium hydrogen sulfate, it is to avoid sulphur
The viscosity of sour hydrogen ammonium causes the surface that flying dust is deposited on air preheater to cause the blocking of air preheater;Alkalescence absorbs injection apparatus and is arranged on
It is to reduce SO in flue gas after air preheater, before temperature adjustment enhancing device temperature descending section3The optimum position of total amount.
The beneficial effects of the utility model are:
(1) denitration reaction device adopts low SO2/SO3The catalyst of conversion, reduces SO in denitrating system3Generation;
(2) alkaline absorbent injection apparatus, the SO in efficient removal flue gas are set in system3, suppress the life of ammonium hydrogen sulfate
Into;
(3) using temperature adjustment enhancing device, the flue-gas temperature for entering electrostatic precipitator is made to be less than SO3Acid dew point so that cigarette
SO in gas3It is condensed into sulfuric acid mist and adsorbs on dust surface, by electrostatic precipitator efficient removal;
(4) by the condensation to flue gas of desulfurizing tower, SO in flue gas is promoted3Cold Caragana seed pests, by spray
The optimization design of layer, improves absorption tower slurries to SO3Removing;
(5) wet cottrell is set after desulfurizing tower, further the SO after removing desulfurizing tower in flue gas3;
(6) gradient equipped by each pollutant catabolic gene is removed, and makes SO3Concentration of emission control in 5mg/Nm3Below.
Description of the drawings
Fig. 1 is the structural representation of the utility model embodiment 1;
Fig. 2 is the structural representation of the utility model embodiment 2;
Fig. 3 is the structural representation of the utility model embodiment 3.
Specific embodiment
Below in conjunction with the accompanying drawings and it is embodied as being described further the utility model, but protection domain of the present utility model
It is not limited to this.
Embodiment 1
With reference to Fig. 1, a kind of coal-fired flue-gas SO3Step deep removal system, the system includes SCR denitration device 2, alkalescence
Sorbent injection device 3, air preheater 4, temperature adjustment enhancing device, electrostatic precipitator 6, desulfurizing tower 8 and wet cottrell 9, institute
Temperature adjustment enhancing device is stated including temperature descending section 5 and warming-up section 10, the SCR denitration device 2, alkaline absorbent injection apparatus 3, sky are pre-
Device 4, temperature adjustment enhancing device temperature descending section 5, electrostatic precipitator 6, desulfurizing tower 8, wet cottrell 9, temperature adjustment enhancing device heat up
Section 10 is sequentially arranged along flue gas removing direction;Booster fan 7 is provided between the electrostatic precipitator 6 and desulfurizing tower 8.
Coal-fired flue-gas out sequentially pass through afterwards SCR denitration device 2, alkaline absorbent injection apparatus 3, air preheater from boiler 1
4th, the temperature descending section 5 of temperature adjustment enhancing device, electrostatic precipitator 6, booster fan 7, desulfurizing tower 8, wet cottrell 9, temperature adjustment increase
The warming-up section 10 of effect device, is finally emptied by chimney 11.
Three layers of low SO are set in described SCR denitration device 22/SO3The catalyst of conversion ratio, SO2/SO3Conversion ratio is less than
0.8%, reduce flue gas SO during by catalysis2To SO3Conversion, suppress SO3Generation;
Described alkaline absorbent injection apparatus 3 is arranged after SCR denitration device 2, before air preheater 4, into flue alkali is sprayed
Property absorbent, the SO in alkaline absorbent and flue gas3Reaction, SO3Removal efficiency more than 90%;
Described alkaline absorbent is arbitrary in magnesium hydroxide, calcium hydroxide, niter cake, sodium carbonate, calcium bicarbonate
Kind;
The temperature descending section 5 of described temperature adjustment enhancing device is arranged on after air preheater 4, by the temperature descending section 5 of temperature adjustment enhancing device
Control enters the flue-gas temperature of electrostatic precipitator 6 below the acid dew point of flue gas so that the SO in flue gas3It is condensed into sulfuric acid mist simultaneously
Absorption is removed on dust surface after being trapped by electrostatic precipitator 6, and the most sulfur trioxides in flue gas are by electrostatic precipitator 6
Removing;
Described booster fan 7 is arranged on after electrostatic precipitator 6, before desulfurizing tower 8, overcomes whole pollutant control system
Resistance;
Described desulfurizing tower 8 is arranged on after booster fan 7, and the spray of desulfurizing tower 8 is acted on, and reduces flue-gas temperature, is promoted
SO in flue gas3Caragana seed pests;By spraying layer and the optimization design of demister, absorption tower slurries are improved to SO in flue gas3It is de-
Remove;
Described wet cottrell 9 is arranged on after desulfurizing tower 8, flue gas after desulfurizing tower 8, SO3Mainly with H2SO4
In the form of microlayer model, the diameter of its average grain belongs to sub-micron category, wet cottrell 9 pairs below 0.4 μm
Submicron particles have very high capture rate, can effectively improve SO in flue gas3Removal efficiency;
Described flue gas Jing after wet cottrell 9, into the warming-up section 10 of temperature adjustment enhancing device, by flue-gas temperature liter
Height to 85 DEG C or so, most after Jing chimneys 11 empty.
Embodiment 2
With reference to Fig. 2, a kind of coal-fired flue-gas SO3Step deep removal system, the system includes SCR denitration device 2, alkalescence
Sorbent injection device 3, air preheater 4, temperature adjustment enhancing device, electrostatic precipitator 6, desulfurizing tower 8 and wet cottrell 9, institute
Temperature adjustment enhancing device is stated including temperature descending section 5 and warming-up section 10, the SCR denitration device 2, air preheater 4, the cooling of temperature adjustment enhancing device
Section 5, electrostatic precipitator 6, desulfurizing tower 8, wet cottrell 9, temperature adjustment enhancing device warming-up section 10 are suitable along flue gas removing direction
Secondary setting;The position that alkaline absorbent injection apparatus 3 is arranged is the electrostatic precipitator 6 and desulfurization before SCR denitration device 2
Booster fan 7 is provided between tower 8.
Coal-fired flue-gas out sequentially pass through afterwards alkaline absorbent injection apparatus 3, SCR denitration device 2, air preheater from boiler 1
4th, the temperature descending section 5 of temperature adjustment enhancing device, electrostatic precipitator 6, booster fan 7, desulfurizing tower 8, wet cottrell 9, temperature adjustment increase
The warming-up section 10 of effect device, is finally emptied by chimney 11.
Embodiment 3
With reference to Fig. 3, a kind of coal-fired flue-gas SO3Step deep removal system, the system includes SCR denitration device 2, alkalescence
Sorbent injection device 3, air preheater 4, temperature adjustment enhancing device, electrostatic precipitator 6, desulfurizing tower 8 and wet cottrell 9, institute
Temperature adjustment enhancing device is stated including temperature descending section 5 and warming-up section 10, the SCR denitration device 2, air preheater 4, the cooling of temperature adjustment enhancing device
Section 5, electrostatic precipitator 6, desulfurizing tower 8, wet cottrell 9, temperature adjustment enhancing device warming-up section 10 are suitable along flue gas removing direction
Secondary setting;The position that alkaline absorbent injection apparatus 3 is arranged is institute after air preheater 4, before temperature adjustment enhancing device temperature descending section 5
State and booster fan 7 is provided between electrostatic precipitator 6 and desulfurizing tower 8.
Coal-fired flue-gas out sequentially pass through afterwards SCR denitration device 2, air preheater 4, alkaline absorbent injection apparatus from boiler 1
3rd, the temperature descending section 5 of temperature adjustment enhancing device, electrostatic precipitator 6, booster fan 7, desulfurizing tower 8, wet cottrell 9, temperature adjustment increase
The warming-up section 10 of effect device, is finally emptied by chimney 11.
Claims (3)
1. a kind of coal-fired flue-gas SO3Step deep removal system, it is characterised in that:The system includes SCR denitration device, alkalescence
Sorbent injection device, air preheater, temperature adjustment enhancing device, electrostatic precipitator, desulfurizing tower and wet cottrell, the temperature adjustment
Enhancing device includes temperature descending section and warming-up section, the SCR denitration device, air preheater, temperature adjustment enhancing device temperature descending section, electrostatic precipitation
Device, desulfurizing tower, wet cottrell, temperature adjustment enhancing device warming-up section are sequentially arranged along flue gas removing direction;The alkalescence is inhaled
Receiving the position that agent injection apparatus arranges is before SCR denitration device, after SCR denitration device, before air preheater, or air preheater it
Afterwards, before temperature adjustment enhancing device temperature descending section.
2. coal-fired flue-gas SO according to claim 13Step deep removal system, it is characterised in that:The SCR denitration dress
Three layers of catalyst are centered.
3. coal-fired flue-gas SO according to claim 13Step deep removal system, it is characterised in that:The electrostatic precipitator
Booster fan is provided between desulfurizing tower.
Priority Applications (1)
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CN201621114331.9U CN206152631U (en) | 2016-10-12 | 2016-10-12 | Coal -fired flue gas SO3 step degree of depth desorption system |
Applications Claiming Priority (1)
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CN201621114331.9U CN206152631U (en) | 2016-10-12 | 2016-10-12 | Coal -fired flue gas SO3 step degree of depth desorption system |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106334441A (en) * | 2016-10-12 | 2017-01-18 | 浙江大学 | Cascade and deep coal-fired flue gas SO<3> removal system and method |
CN107321181A (en) * | 2017-08-27 | 2017-11-07 | 佛山市亚科恒远科技有限公司 | A kind of flue gas processing device |
CN109045953A (en) * | 2018-10-16 | 2018-12-21 | 西安交通大学 | A kind of cooling dehumidification by condensation decontamination reheating of flue gas disappears white system and method |
-
2016
- 2016-10-12 CN CN201621114331.9U patent/CN206152631U/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106334441A (en) * | 2016-10-12 | 2017-01-18 | 浙江大学 | Cascade and deep coal-fired flue gas SO<3> removal system and method |
CN107321181A (en) * | 2017-08-27 | 2017-11-07 | 佛山市亚科恒远科技有限公司 | A kind of flue gas processing device |
CN109045953A (en) * | 2018-10-16 | 2018-12-21 | 西安交通大学 | A kind of cooling dehumidification by condensation decontamination reheating of flue gas disappears white system and method |
CN109045953B (en) * | 2018-10-16 | 2023-10-24 | 西安交通大学 | Flue gas cooling, condensing, dehumidifying, decontaminating, reheating and whitening system and method |
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