CN203971719U - Rotary spraying desulfurization and denitrification system for sintering flue gas - Google Patents
Rotary spraying desulfurization and denitrification system for sintering flue gas Download PDFInfo
- Publication number
- CN203971719U CN203971719U CN201420393618.4U CN201420393618U CN203971719U CN 203971719 U CN203971719 U CN 203971719U CN 201420393618 U CN201420393618 U CN 201420393618U CN 203971719 U CN203971719 U CN 203971719U
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- CN
- China
- Prior art keywords
- flue gas
- absorption tower
- sack cleaner
- cao
- spraying absorption
- 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.)
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 239000003546 flue gas Substances 0.000 title claims abstract description 50
- 238000005507 spraying Methods 0.000 title claims abstract description 38
- 238000006477 desulfuration reaction Methods 0.000 title claims description 14
- 238000005245 sintering Methods 0.000 title abstract description 5
- 230000023556 desulfurization Effects 0.000 title description 6
- 238000010521 absorption reaction Methods 0.000 claims abstract description 35
- 238000012806 monitoring device Methods 0.000 claims abstract description 20
- 230000001699 photocatalysis Effects 0.000 claims abstract description 16
- 239000003517 fume Substances 0.000 claims description 15
- 238000007146 photocatalysis Methods 0.000 claims description 12
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003054 catalyst Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 45
- 238000000034 method Methods 0.000 description 21
- 238000007254 oxidation reaction Methods 0.000 description 10
- 230000003647 oxidation Effects 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 230000003009 desulfurizing effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 229910010413 TiO 2 Inorganic materials 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model provides a rotatory spraying SOx/NOx control system of sintering flue gas, includes CaO jar, CaO digester, entry flue gas monitoring devices, rotatory spraying absorption tower, sack cleaner and export flue gas monitoring devices, adds the photocatalytic reactor between rotatory spraying absorption tower and sack cleaner, and the photocatalytic reactor is connected on the connecting tube between rotatory spraying absorption tower and sack cleaner, and the light of photocatalytic reactorThe source is ultraviolet light and the catalyst is TiO2. CaO digester one end is connected the CaO jar, and the other end links to each other with rotatory spraying absorption tower, and rotatory spraying absorption tower passes through the pipe connection sack cleaner, is equipped with entry flue gas monitoring devices on the rotatory spraying absorption tower entry pipeline, is equipped with export flue gas monitoring devices on the sack cleaner exit pipeline. The utility model discloses the small investment, take effect soon, operation low cost need not newly to build the denitration project alright realize the SOx/NOx control of sintering flue gas simultaneously.
Description
Technical field
The utility model belongs to field of environment protection, relates in particular to a kind of for sinter fume is carried out to the rotating spraying system of desulphurization denitration simultaneously.
Background technology
12 " in planning, China has clearly proposed nitrogen oxide (NOx) to carry out the target of comprehensively controlling, and requires the discharge of steel enterprise sintering flue gas nitrogen oxide to be less than 300mg/m
3.Sinter fume has all carried out desulfurization treatment process mostly at present, if carry out again denitration after desulfurization, only have the method that adopts SCR or SNCR, SCR technique is mostly in the operating temperature interval of 200 DEG C～450 DEG C, and SNCR technique is in the operating temperature interval of 950 DEG C～1150 DEG C.It is unpractical adopting flue gas reheat processing.Therefore, practical more economically time, desulfurizing and denitrifying process research is imperative.
Number of patent application 201110256257.X discloses " a kind of method of smoke by combining photocatalytic oxidation with ammonia synchronized desulfuring and denitrifying ", and first its flue gas enters photo catalysis reactor, and in flue gas, NOx is oxidized to NO
2, flue gas enters subsequently ammonia process desulfuration tower and contacts with alkaline desulfurizing agent solution is reverse, further deep removal SO
2and NO
2, the present invention, compared with traditional SCR method of denitration denitration, had both solved that to account for area by SCR denitration method large, and investment is large, and the problems such as operating cost height, do not need large investment construction denitration device, and cost is low, significantly reduces operating cost, increases economic efficiency.The method also can be oxidized SO in oxidation of NOx
2, make operating cost higher.
Number of patent application 201010588960.6 disclosed " coal-burning power plant's photochemical catalytic oxidation flue gas desulfurization and denitrification system ", is that first to make purity with oxygenerator be more than 90% oxygen, prepared oxygen is introduced to light-catalyzed reaction tower and react fully, produces with O
2 -for the oxide species of key component.Again oxide species and flue gas (after dedusting) are introduced to oxidation reaction tower, the SO in flue gas simultaneously
2oxidized species are oxidized to end product SO
3, NO and NO
2oxidized species are oxidized to end product NO
3, the SO when flue gas after oxidation reaction passes through absorption tower
3and NO
3be absorbed desulphurization denitration process when completing flue gas.When desorb, obtaining accessory substance nitric-sulfuric acid and collected by accumulator tank, is a kind of industrial chemicals with extensive use.The method is applicable to there is higher concentration SO in flue gas
2and NOx, produce byproduct, and be not suitable for sinter fume.
" photochemical catalytic oxidation is in conjunction with the wet flue gas denitration technique of wet absorption " that number of patent application 200610051737.1 provides, comprises oxidizing process and wet absorption process, pending flue gas is first passed into be equipped be loaded with loaded nano TiO
2the photo catalysis reactor of photochemical catalyst, nitrogen oxide in flue gas is oxidized, flue gas after oxidation enters wet absorption reactor, fully contacts with the denitration absorbing liquor of alkalescence, oxidisability or reproducibility, and the nitrogen oxide in flue gas is discharged by wet absorption after-purification.Technique of the present invention, for the treatment of flue gas, can reach the nitrogen oxide removal efficiency of 60-90%, and its denitration efficiency is high, and equipment is simple, easy to operate, takes up an area little.In flue gas, the oxidation of the gas-phase photocatalysis of NO, only needs UV-irradiation, reaction condition gentleness, and oxidation reaction is rapid, and financial cost is low.But the method needs denitration absorbing liquor to carry out absorption operation, thereby cost is higher.
Number of patent application 200610012526.7 provides " a kind of method of optic catalytic oxidizing, desulfurizing and denitrifying flue gas simultaneously and device ", coal-fired flue-gas is introduced in reactor, filling photochemical catalyst in reactor, and use irradiation catalytic oxidation, described photochemical catalyst is made up of titanium dioxide and the additive of carrier, 0.5% mass ratio, described carrier is quartz sand, and its particle diameter is 4-6mm, and described photochemical catalyst is titanium dioxide and additive agent mixture.The present invention can complete desulphurization denitration simultaneously, and efficiency is high, stable, goes for the SO of different flue gas composition content
2with removing of NOx, desulphurization denitration product can be used as Fertilizer application.This patent is applicable to the SO of high concentration
2and NOx, be not suitable for sintering flue gas desulfurization denitration.
Summary of the invention
It is cheap that the utility model aims to provide a kind of operating cost, can reduce business burden, and in desulfurization, carry out sinter fume rotating spraying system for desulfuration and denitration and the method for denitration.
The purpose of this utility model realizes by following solution:
A kind of sinter fume rotating spraying system for desulfuration and denitration, comprise CaO tank, CaO digester, inlet flue gas monitoring device, rotating spraying absorption tower, sack cleaner and outlet flue gas monitoring device, it is characterized in that, between rotating spraying absorption tower and sack cleaner, set up photo catalysis reactor, photo catalysis reactor is connected in the connecting pipe between rotating spraying absorption tower and sack cleaner, CaO digester one end connects CaO tank, the other end is connected with rotating spraying absorption tower, rotating spraying absorption tower connects sack cleaner by pipeline, rotating spraying absorption tower inlet duct is provided with inlet flue gas monitoring device, sack cleaner outlet conduit is provided with outlet flue gas monitoring device.
Concrete desulphurization denitration process of the present utility model is:
CaO powder in CaO tank enters CaO digester to carry out after digestion process, enter rotating spraying absorption tower, drop after atomization and the abundant mixing and contacting reaction of sinter fume that enters rotating spraying absorption tower, acid ingredient in flue gas is absorbed by CaO alkali droplet rapidly, moisture is evaporated rapidly, completes desulphurization reaction simultaneously; Reacted flue gas enters after the connecting pipe between rotating spraying absorption tower and sack cleaner, under the condition existing at oxygen, and the UV-irradiation TiO that photo catalysis reactor sends
2can produce OH, O
2 -living radical, NO is oxidized to NO by this living radical
2, NO
2by unreacted Ca (OH) completely
2absorb, discharge after then entering sack cleaner dedusting; Enter the concentration of the flue gas flow rate on rotating spraying absorption tower and sulfur dioxide, nitrogen oxide by inlet flue gas monitoring device monitoring; Outlet flue gas monitoring device is monitored the sulfur dioxide in flue gas after desulphurization denitration, concentration and the flue gas flow rate of nitrogen oxide.
The beneficial effects of the utility model are:
Compared with the prior art, the utility model system architecture is simple, small investment, instant effect, and operating cost is cheap, without newly-built denitration project, just can realize the desulphurization denitration of sinter fume simultaneously, reduces environmental pollution.
Brief description of the drawings
Fig. 1 is sinter fume rotating spraying system for desulfuration and denitration structural representation.
In figure: CaO tank 1, CaO digester 2, inlet flue gas monitoring device 3, rotating spraying absorption tower 4, photo catalysis reactor 5, sack cleaner 6, outlet flue gas monitoring device 7.
Detailed description of the invention
The utility model sinter fume rotating spraying system for desulfuration and denitration is on the basis of original CaO tank 1, CaO digester 2, inlet flue gas monitoring device 3, rotating spraying absorption tower 4, sack cleaner 6, outlet flue gas monitoring device 7, between rotating spraying absorption tower 4 and sack cleaner 6, set up photo catalysis reactor 5, photo catalysis reactor 5 is connected in the connecting pipe between rotating spraying absorption tower 4 and sack cleaner 6, the light source of photo catalysis reactor 5 is ultraviolet light, and catalyst is TiO
2.
CaO digester 2 one end connect CaO tank 1, and the other end is connected with rotating spraying absorption tower 4, and rotating spraying absorption tower 4 connects sack cleaner 6 by pipeline.On the inlet duct on rotating spraying absorption tower 4, be provided with inlet flue gas monitoring device 3, on the outlet conduit of sack cleaner 6, be provided with outlet flue gas monitoring device 7.
Apply the concrete technology parameter of embodiment of the present utility model and comparative example and implementation result contrast situation thereof in table 1.
Table 1 embodiment and comparative example concrete technology parameter and Contrast on effect
| ? | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example |
| SO in entrance sinter fume 2Concentration mg/Nm 3 | 1000 | 1000 | 1000 | 1000 |
| NOx concentration mg/Nm in entrance sinter fume 3 | 400 | 350 | 370 | 380 |
| SO in outlet sinter fume 2Concentration mg/Nm 3 | 82 | 80 | 74 | 81 |
| NOx concentration mg/Nm in outlet sinter fume 3 | 250 | 240 | 240 | 248 |
| Desulfuration efficiency % | 92 | 92 | 93 | 92 |
| Denitration efficiency % | 37.5 | 31.4 | 35.1 | 34.7 |
Claims (1)
1. a sinter fume rotating spraying system for desulfuration and denitration, comprise CaO tank, CaO digester, inlet flue gas monitoring device, rotating spraying absorption tower, sack cleaner and outlet flue gas monitoring device, it is characterized in that, between rotating spraying absorption tower and sack cleaner, set up photo catalysis reactor, photo catalysis reactor is connected in the connecting pipe between rotating spraying absorption tower and sack cleaner, CaO digester one end connects CaO tank, the other end is connected with rotating spraying absorption tower, rotating spraying absorption tower connects sack cleaner by pipeline, rotating spraying absorption tower inlet duct is provided with inlet flue gas monitoring device, sack cleaner outlet conduit is provided with outlet flue gas monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420393618.4U CN203971719U (en) | 2014-07-16 | 2014-07-16 | Rotary spraying desulfurization and denitrification system for sintering flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420393618.4U CN203971719U (en) | 2014-07-16 | 2014-07-16 | Rotary spraying desulfurization and denitrification system for sintering flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203971719U true CN203971719U (en) | 2014-12-03 |
Family
ID=51969194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420393618.4U Expired - Fee Related CN203971719U (en) | 2014-07-16 | 2014-07-16 | Rotary spraying desulfurization and denitrification system for sintering flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203971719U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268292A (en) * | 2014-07-16 | 2016-01-27 | 鞍钢股份有限公司 | Sintering flue gas rotary spray desulfurization and denitrification system and method |
| CN111992016A (en) * | 2020-07-31 | 2020-11-27 | 哈尔滨理工大学 | Biomass boiler denitration system |
-
2014
- 2014-07-16 CN CN201420393618.4U patent/CN203971719U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105268292A (en) * | 2014-07-16 | 2016-01-27 | 鞍钢股份有限公司 | Sintering flue gas rotary spray desulfurization and denitrification system and method |
| CN111992016A (en) * | 2020-07-31 | 2020-11-27 | 哈尔滨理工大学 | Biomass boiler denitration system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20200716 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |