CN207899245U - A kind of system of flue gas wet type combined desulfurization and denitration - Google Patents
A kind of system of flue gas wet type combined desulfurization and denitration Download PDFInfo
- Publication number
- CN207899245U CN207899245U CN201721848739.3U CN201721848739U CN207899245U CN 207899245 U CN207899245 U CN 207899245U CN 201721848739 U CN201721848739 U CN 201721848739U CN 207899245 U CN207899245 U CN 207899245U
- Authority
- CN
- China
- Prior art keywords
- desulfurization
- denitration
- section
- ammonia
- doctor solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a kind of system of flue gas wet type combined desulfurization and denitration, the wet type combined desulfurization and denitration system includes combined desulfurization and denitration tower, desulfurization fluid circulation, complex liquid circulated sprinkling and regenerative system, washes ammonia system；Three sections of spraying layers are arranged in combined desulfurization and denitration tower from top to bottom, are desulfurization section, denitration section successively and wash ammonia section, and desulfurization section is arranged void tower structure, denitration section and wash ammonia section setting filling-material structure；Desulfurization fluid circulation includes doctor solution surge tank, doctor solution circulating pump and desulfurization spraying layer；Complex liquid circulated sprinkling and regenerative system include iron reduction tank, complex liquid surge tank, regeneration complexing liquid pump, complex liquid circulating pump, plate filter, denitration spraying layer；It includes ammonia absorbing liquid pump, ammonia absorption spraying layer, doctor solution surge tank to wash ammonia system.The utility model is simple for process, stable, and applicability is wide, and absorbent is repeatable to be utilized, and desulfurization degree is 98% or more, and denitrification rate is up to 72% or more.
Description
Technical field
The utility model is related to flue gas purification system more particularly to a kind of systems of flue gas wet type combined desulfurization and denitration.
Background technology
Oxysulfide, nitrogen oxides, PM, the heavy metal etc. that fuel combustion generates, which produce environment, to be seriously affected；Wherein,
Oxysulfide and nitrogen oxides are the primary pollution source for causing atmosphere pollution, are discharged to natural environment and human being's production, life
It is seriously endangered etc. bringing；Therefore flue gas has to pass through desulphurization denitration processing before discharging.
With more ripe flue gas desulfurization technique it is at present wet processing, wherein the more of utilization is limestone-gypsum
Method and sodium alkali；The gas denitrifying technology overwhelming majority is restored using selective catalysis（SCR）.Existing desulphurization denitration technology is all
It is separately to handle desulfurization with denitration, is wanted although the desulfurization of existing maturation and the coupling of denitration technology can make flue gas reach discharge
It asks, but existing desulphurization denitration coupling technique causes entire desulfurizing and denitrifying process and equipment complicated, investment cost and operating cost
It is high.
Patent CN201410341440.3 discloses one kind and passing through FeⅡAfter EDTA complexed absorptions NO, by being generated to complexing
FeⅡ（NO）The Fe that air or oxygen makes it be oxidized to that NO cannot be absorbed is blasted in EDTAⅢEDTA solution is simultaneously released with NO2For
Main high concentration nitrogen oxide, then with iron filings by FeⅢEDTA is reduced to FeⅡIt is recycled after EDTA, but in the patent after oxidation
The oxygenation efficiency of the nitrogen oxides of release is unknown, in oxidation process, not oxidized Fe during complexed absorption NOⅡEDTA is into one
Step oxidation makes the iron that complex liquid reducing/regenerating consumes increase.Patent CN201410341041.7 discloses a kind of first with ferrous iron
Denitration is complexed in chelating agent, and desulfurization is realized in desulfurization section using the ammonium hydroxide of the ammonia and supplement that are generated by metallic iron reduction；But it is sub-
Iron chelating agent also has oxysulfide good assimilation effect, after first denitration desulfurization will cause oxysulfide in ferrous chelating agent
Accumulate and gradually form sulfate, sulfate run up to it is a certain amount of after will seriously affect ferrous chelating agent to nitric oxide production complexing
Effect.
Utility model content
The purpose of the utility model is to overcome deficiency in the prior art, provide a kind of removal efficiency it is high, it is reliable for operation, throw
The system for providing flue gas wet type combined desulfurization and denitration at low cost.
To achieve the goals above, the utility model uses technical solution below：A kind of flue gas wet type combined desulfurization is de-
The system of nitre, which is characterized in that the system include combined desulfurization and denitration tower, desulfurization fluid circulation, complex liquid circulated sprinkling and
Regenerative system washes ammonia system；
Three sections of spraying layers are arranged in combined desulfurization and denitration tower from top to bottom, are desulfurization section, denitration section successively and wash ammonia section, desulfurization
Section setting void tower structure, denitration section and wash ammonia section setting filling-material structure；
Desulfurization fluid circulation includes doctor solution surge tank, doctor solution circulating pump and desulfurization spraying layer, and the doctor solution is slow
The bottom that tank is located at desulfurization section is rushed, desulfurization spraying layer is arranged in desulfurization section top, and the desulfurization spraying layer passes through doctor solution circulating pump
It is connected to doctor solution surge tank；
Complex liquid circulated sprinkling and regenerative system include iron reduction tank, complex liquid surge tank, regeneration complexing liquid pump, complexing
Denitration spraying layer is arranged in liquid circulating pump, plate filter, denitration spraying layer, denitration section top, and lower part setting meets liquid bucket, institute
State connect liquid bucket be sequentially connected iron reduction tank, regeneration complexing liquid pump, plate filter, doctor solution surge tank, complex liquid circulating pump
Afterwards, it is connected to denitration spraying layer；
It includes ammonia absorbing liquid pump, ammonia absorption spraying layer to wash ammonia system, and the top setting ammonia for washing ammonia section absorbs spraying layer,
Lower part setting connects liquid bucket, and the liquid bucket that connects is connected to doctor solution surge tank, and doctor solution surge tank is connected to by ammonia absorbing liquid pump
Ammonia absorbs spraying layer.
Further, it in the system, between desulfurization section and denitration section and denitration section and washes between ammonia section with connecing liquid bucket
It separates, connects and be furnished with gas redistributor above liquid bucket, percent opening is 20 ~ 70%.
Further, in the system, doctor solution pump inlet pipeline is equipped with soda lye adding mouth, doctor solution surge tank
On be provided with waste liquid outlet.
Further, in the system, the multi-layer intercrossed arrangement of desulfurization spraying layer point, every layer of spraying layer connects a doctor solution
Circulating pump.
Further, the plate filter bottom sets precipitation discharge port.
Further, in the combined desulfurization and denitration tower, smoke inlet is arranged in the lower part of desulfurization section, washes above ammonia section and sets
Demister is set, exhanst gas outlet is arranged in the top of demister.
Compared with prior art, the utility model has the advantages that：
（1）The utility model has used for reference existing sodium alkali sulfur removal technology and complexing denitrating technique, is taken off using after first desulfurization
The mode of nitre is segmented removing oxysulfide and nitrogen oxides in combined desulfurization and denitration tower, and low energy consumption for system coupling, stable,
It is easy to operate.
（2）Doctor solution is all made of closed cycle with denitration liquid, reduces secondary pollution.
（3）The ammonia that complex liquid regenerative process generates, the ammonia absorbed in doctor solution are absorbed washing ammonia Duan Zhongyong doctor solutions
In desulfurization section circulated sprinkling doctor solution equally can sulfur dioxide absorption, reduce the consumption of soda lye.
（4）The system for desulfuration and denitration and technique of the utility model have stronger be directed to the flue gas that different process generates
Property, use scope is wide, and removal rate is high, and oxysulfide removal rate is 98% or more, and nitrogen oxide removal efficiency is up to 72% or more.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of the system of flue gas wet type combined desulfurization and denitration of the utility model.
In figure：1, gas inlet, 2, desulfurization spraying layer, 3, connect liquid bucket, 4, gas redistributor, 5, denitration section, 6, wash ammonia
Section, 7, demister, 8, doctor solution circulating pump, 9, ammonia absorbing liquid pump, 10, exhanst gas outlet, 11, ammonia absorb spraying layer, 12, wash ammonia section
Filler, 13, denitration spraying layer, 14, denitration section filler, 15, desulfurization section, 16, doctor solution surge tank, 17, iron reduction tank, 18,
Regeneration complexing liquid pump, 19, plate filter, 20, complex liquid surge tank, 21, complex liquid circulating pump, 22, soda lye mouth is added,
23, desulfurization waste liquor outlet, 24, precipitation discharge port.
Specific implementation mode
With reference to specific embodiment, the utility model is described in further detail, but it is new to be not limited to this practicality
The range of type.
A kind of system of flue gas wet type combined desulfurization and denitration of the utility model, including combined desulfurization and denitration tower, doctor solution follow
Loop system, complex liquid circulated sprinkling and regenerative system wash ammonia system；Three sections of sprays are arranged in combined desulfurization and denitration tower from top to bottom
Layer is desulfurization section 15, denitration section 5 successively and washes ammonia section 6, and desulfurization section is arranged void tower structure, denitration section and washes ammonia section setting filler
Structure；Desulfurization fluid circulation includes doctor solution surge tank 16, doctor solution circulating pump 8 and desulfurization spraying layer 2；Complex liquid cycle spray
Leaching and regenerative system include complex liquid surge tank 20, iron reduction tank 17, regeneration complexing liquid pump 18, complex liquid circulating pump 21, plate
Frame filter 19, denitration spraying layer 13；It includes ammonia absorbing liquid pump 9, ammonia absorption spraying layer 11, doctor solution surge tank to wash ammonia system
16。
A kind of method of flue gas wet type combined desulfurization and denitration of the utility model, flue gas are entered by gas inlet 1 de- first
The desulfurization section 15 of sulphur denitrating tower is inversely in direct contact the removing for completing oxysulfide in desulfurization section 15 with the doctor solution after atomization；
Gas after desulfurization enters denitration section 5 through gas redistributor 4, in denitration section 5 and FeⅡEDTA complex liquids are straight on 14 surface of filler
Haptoreaction, the nitrogen oxides in complex liquid complexed absorption flue gas are connect, flue gas blows out the ammonia generated in complex liquid regenerative process；
Gas after desulphurization denitration enters denitration section after gas redistributor 4, direct on 12 surface of filler with doctor solution washing ammonia section 6
Haptoreaction, the ammonia in flue gas be absorbed by liquid absorption after after 7 demisting of demister direct emission.In the process, doctor solution
Circulated sprinkling absorbs the ammonia that complex liquid regenerative process generates with weakly acidic doctor solution, the doctor solution for absorbing ammonia is used in combination to follow
Ring desulfurization reduces the consumption of soda lye；Complex liquid after complexing nitrogen oxides enters iron reduction tank 17 and iron filings reaction regeneration
And generating ammonia dissolving in the solution, the complex liquid after regeneration, which is pumped into through regeneration complex liquid 18 after plate filter 19 filters, to flow
Enter to complex liquid surge tank 20 and used for 21 circulated sprinkling of complex liquid circulating pump, and reacts and generate ferric hydroxide precipitate in sheet frame mistake
It filters out and stores in filter 19.
Embodiment 1
Desulphurization denitration, combined desulfurization and denitration tower desulfurization are carried out with above-mentioned flue gas wet type combined desulfurization and denitration system and method
Section uptake zone diameter of phi=0.4m, high H=1.8m；Denitration section uptake zone diameter of phi=1m, the high H=1m of filler；It is straight to wash ammonia section uptake zone
Diameter Φ=0.6m, the high H=1m of filler；Prepare the Fe of 0.05mol/LⅡEDTA complex liquids adjust pH=5.5；Introducing flue-gas temperature is
500 DEG C, flow 750kg/h, wherein content of nitric oxide are 800mg/Nm3, content of sulfur dioxide is 4500 mg/Nm3, system
The liquid-gas ratio that doctor solution is controlled in operational process is 8L/m3, doctor solution surge tank pH value of solution=6.3, doctor solution temperature is 30 DEG C,
Reaction temperature is 70 DEG C, residence time 25min in iron reduction tank when complex liquid regenerates, and denitration section complex liquid temperature is 50
DEG C, liquid-gas ratio 4.3L/m3, ammonia absorbing liquid temperature is 18 DEG C, liquid-gas ratio 10L/m3；Whole process ammonia absorptivity is up to 95%, two
Sulfur oxide removal rate is 98.2%, and nitric oxide removal rate is 72%.
Embodiment 2
Desulphurization denitration, combined desulfurization and denitration tower desulfurization are carried out with above-mentioned flue gas wet type combined desulfurization and denitration system and method
Section uptake zone diameter of phi=0.4m, high H=1.8m；Denitration section uptake zone diameter of phi=1m, the high H=1m of filler；It is straight to wash ammonia section uptake zone
Diameter Φ=0.6m, the high H=1m of filler；Complexing a period of time, and Fe after the multiple circular regeneration of complex liquidⅡEDTA complex liquids it is a concentration of
0.06mol/L, pH=7.6；It is 500 DEG C to introduce flue-gas temperature, and flow 750kg/h, wherein content of nitric oxide are 800mg/
Nm3, content of sulfur dioxide is 4500 mg/Nm3, the liquid-gas ratio of control doctor solution is 8L/m in system operation3, pass through addition
Soda lye controls doctor solution surge tank pH value of solution=6.3, and it is 30 DEG C that heat exchange, which maintains doctor solution temperature, and flue gas after desulfurization enters denitration
Duan Wendu is 50 DEG C, and reaction temperature is 70 DEG C, residence time 30min in iron reduction tank when complex liquid regenerates, denitration section
Complex liquid temperature is 45 DEG C, and the liquid-gas ratio of denitration section is 5L/m3, ammonia absorbing liquid temperature is 15 DEG C, liquid-gas ratio 12L/m3；Entirely
For process ammonia absorptivity up to 97%, removal rate of sulfur dioxide 98.6%, nitric oxide removal rate is 76%.
Embodiment 3
Desulphurization denitration, combined desulfurization and denitration tower desulfurization are carried out with above-mentioned flue gas wet type combined desulfurization and denitration system and method
Section uptake zone diameter of phi=0.4m, high H=1.8m；Denitration section uptake zone diameter of phi=1m, the high H=1m of filler；It is straight to wash ammonia section uptake zone
Diameter Φ=0.6m, the high H=1m of filler；Fe after the multiple circular regeneration of complex liquidⅡA concentration of 0.06mol/L of EDTA complex liquids, pH=
7.6；It is 500 DEG C to introduce flue-gas temperature, and flow 750kg/h, wherein content of nitric oxide are 800mg/Nm3, sulfur dioxide contains
Amount is 4500 mg/Nm3, the liquid-gas ratio of control doctor solution is 8L/m in system operation3, desulfurization is controlled by the way that soda lye is added
Liquid surge tank pH value of solution=6.8, it is 30 DEG C that heat exchange, which maintains doctor solution temperature, and it is 50 DEG C that flue gas after desulfurization, which enters denitration section temperature, network
Reaction temperature is 75 DEG C, residence time 25min in iron reduction tank when closing liquid regeneration, and denitration section complex liquid temperature is 45
DEG C, the liquid-gas ratio of denitration section is 4.5L/m3, ammonia absorbing liquid temperature is 15 DEG C, liquid-gas ratio 12L/m3；Whole process ammonia absorptivity
Up to 96%, removal rate of sulfur dioxide 99%, nitric oxide removal rate is 74%.
Claims (6)
1. a kind of system of flue gas wet type combined desulfurization and denitration, which is characterized in that the system includes combined desulfurization and denitration tower, desulfurization
Fluid circulation, complex liquid circulated sprinkling and regenerative system wash ammonia system；
Three sections of spraying layers are arranged in combined desulfurization and denitration tower from top to bottom, are desulfurization section, denitration section successively and wash ammonia section, and desulfurization section is set
It empties tower structure, denitration section and washes ammonia section setting filling-material structure；
Desulfurization fluid circulation includes doctor solution surge tank, doctor solution circulating pump and desulfurization spraying layer, the doctor solution surge tank
Positioned at the bottom of desulfurization section, desulfurization spraying layer is arranged in desulfurization section top, and the desulfurization spraying layer is connected by doctor solution circulating pump
To doctor solution surge tank；
Complex liquid circulated sprinkling and regenerative system include iron reduction tank, complex liquid surge tank, liquid pump is complexed in regeneration, complex liquid follows
Denitration spraying layer is arranged in ring pump, plate filter, denitration spraying layer, denitration section top, and lower part setting connects liquid bucket, described to connect
After liquid bucket is sequentially connected iron reduction tank, regeneration complexing liquid pump, plate filter, doctor solution surge tank, complex liquid circulating pump, even
It is connected to denitration spraying layer；
It includes ammonia absorbing liquid pump, ammonia absorption spraying layer to wash ammonia system, and the top setting ammonia for washing ammonia section absorbs spraying layer, lower part
Setting connects liquid bucket, and the liquid bucket that connects is connected to doctor solution surge tank, and doctor solution surge tank is connected to ammonia by ammonia absorbing liquid pump and inhales
Receive spraying layer.
2. a kind of system of flue gas wet type combined desulfurization and denitration according to claim 1, which is characterized in that desulfurization section and denitration
Between section and denitration section is separated with connecing liquid bucket with washing between ammonia section, is connect liquid bucket top and is furnished with gas redistributor, percent opening is
20~70%。
3. a kind of system of flue gas wet type combined desulfurization and denitration according to claim 1, which is characterized in that doctor solution circulating pump
Inlet pipeline is equipped with soda lye adding mouth, and desulfurization waste liquor outlet is provided on doctor solution surge tank.
4. a kind of system of flue gas wet type combined desulfurization and denitration according to claim 1, which is characterized in that desulfurization spraying layer point
Multi-layer intercrossed arrangement, every layer of spraying layer connect a doctor solution circulating pump.
5. a kind of system of flue gas wet type combined desulfurization and denitration according to claim 1, which is characterized in that the plate-frame filtering
Device bottom sets precipitation discharge port.
6. a kind of system of flue gas wet type combined desulfurization and denitration according to claim 1, which is characterized in that the combined desulfurization
In denitrating tower, smoke inlet is arranged in the lower part of desulfurization section, washes the top setting demister of ammonia section, flue gas is arranged in the top of demister
Outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721848739.3U CN207899245U (en) | 2017-12-26 | 2017-12-26 | A kind of system of flue gas wet type combined desulfurization and denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721848739.3U CN207899245U (en) | 2017-12-26 | 2017-12-26 | A kind of system of flue gas wet type combined desulfurization and denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207899245U true CN207899245U (en) | 2018-09-25 |
Family
ID=63569121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721848739.3U Active CN207899245U (en) | 2017-12-26 | 2017-12-26 | A kind of system of flue gas wet type combined desulfurization and denitration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207899245U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983133A (en) * | 2017-12-26 | 2018-05-04 | 上海亨远船舶设备有限公司 | A kind of system and method for flue gas wet type combined desulfurization and denitration |
| CN110270197A (en) * | 2019-06-28 | 2019-09-24 | 贵州开磷集团矿肥有限责任公司 | A kind of washing system of phosphoric acid extraction tail gas |
-
2017
- 2017-12-26 CN CN201721848739.3U patent/CN207899245U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107983133A (en) * | 2017-12-26 | 2018-05-04 | 上海亨远船舶设备有限公司 | A kind of system and method for flue gas wet type combined desulfurization and denitration |
| CN110270197A (en) * | 2019-06-28 | 2019-09-24 | 贵州开磷集团矿肥有限责任公司 | A kind of washing system of phosphoric acid extraction tail gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107983133A (en) | A kind of system and method for flue gas wet type combined desulfurization and denitration | |
| CN103706238B (en) | System and method for removing SO2, NO and Hg in smoke on the basis of heterogeneous Fenton | |
| CN104941410B (en) | Flue gas desulfurization and denitrification integrated method and device based on two-step oxidation process of active molecules O3 at low temperature | |
| CN207641266U (en) | Chlorine dioxide denitrification apparatus | |
| CN102489129A (en) | Industrial flue gas purification, desulfurization and denitrification integrated device and working method thereof | |
| CN105195005B (en) | Coking flue gas and ammonia-containing water integrated treatment economic benefits and social benefits cleaning system | |
| CN203108418U (en) | Wet process flue gas desulfurization and denitrification integrated device | |
| WO2022068034A1 (en) | System and method for advanced treatment of low-concentration cs2 by means of heterogeneous catalytic oxidation technology | |
| CN105032142A (en) | Flue gas integration removal system and method by means of gas-like phase preoxidation combining with absorption | |
| CN105194991B (en) | Glass kiln flue gas desulfurization and denitrification system and technique | |
| CN106925093B (en) | Composite ship ballast water and ship waste gas treatment system | |
| CN105833686A (en) | Fume nitrogen and sulfur resource utilization method and device thereof | |
| CN106731783A (en) | Integrated fume desulfurization denitrification agent and its application method | |
| CN207899245U (en) | A kind of system of flue gas wet type combined desulfurization and denitration | |
| CN111644029A (en) | Low-temperature denitration, dedusting and whitening process device after wet desulphurization | |
| CN104056538B (en) | Flue gas purifying system and method with integration of desulfurization and denitrification | |
| CN209530493U (en) | System for industrial boiler flue gas desulfurization denitration | |
| CN106345288B (en) | A kind of method and system using phosphate ore pulp processing sulfur-containing smoke gas | |
| CN103768919B (en) | A kind of flue gas desulfurization and denitration technique method | |
| CN110219724A (en) | A kind of purification of ship tail gas and residual neat recovering system and method | |
| CN207342475U (en) | A kind of steel sintering machine flue gas desulfurization and denitrification equipment | |
| CN105727712B (en) | A kind of flue gas desulfurization denitration dust-removing integrated equipment of coal-fired ceramic kiln | |
| CN106039970A (en) | Method for removing sulfur dioxide from sulfuric acid industrial tail gas and recovering sulfuric acid, and apparatus thereof | |
| CN113289479B (en) | Flue gas denitration method for strengthening UV/homogeneous Fenton system by using sodium silicate | |
| CN203389527U (en) | Low-temperature multi-effect flue gas treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |