CN205007830U - Denitration dust pelletizing system of industrial stoves flue gas - Google Patents
Denitration dust pelletizing system of industrial stoves flue gas Download PDFInfo
- Publication number
- CN205007830U CN205007830U CN201520601368.3U CN201520601368U CN205007830U CN 205007830 U CN205007830 U CN 205007830U CN 201520601368 U CN201520601368 U CN 201520601368U CN 205007830 U CN205007830 U CN 205007830U
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- CN
- China
- Prior art keywords
- flue
- reactor
- flue gas
- catalyst
- calcium hydroxide
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- 239000003546 flue gas Substances 0.000 title claims abstract description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000000428 dust Substances 0.000 title claims abstract description 20
- 238000005453 pelletization Methods 0.000 title abstract 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 29
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 29
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 29
- 239000003054 catalyst Substances 0.000 claims abstract description 29
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 239000008187 granular material Substances 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims description 11
- 239000000779 smoke Substances 0.000 claims description 9
- 239000003517 fume Substances 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 2
- 235000011116 calcium hydroxide Nutrition 0.000 abstract description 27
- 229910021529 ammonia Inorganic materials 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 3
- 235000010261 calcium sulphite Nutrition 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Denitration dust pelletizing system of industrial stoves flue gas includes slaked lime injection apparatus, flue gas mixing arrangement, high -efficient dust remover, spouts ammonia device, fluidized bed reactor, on slaked lime injection apparatus, flue gas mixing arrangement set up the admission line of high -efficient dust remover respectively, the export of dust remover was linked together with the imported flue of reactor to install the guiding device respectively, this flue below is equipped with the ash bucket, spouts ammonia device and current equalizer and installs on the entry flue of reactor, fluidized bed reactor is inside to be equipped with the perforated plate that is used for placing the catalyst granules, arranges on the reactor to be used for the hole that the catalyst is reinforced and unload.
Description
Technical field:
The utility model relates to a kind of Industrial Stoves tails dedusting denitration technology field, is specially adapted to denitration and the dedusting of the flue gases such as sinter fume, fire coal boiler fume and cement industry.
Background technology:
Along with the dynamics of air pollution control strengthens gradually, the emphasis of policy starts to heavy polluted industry transfers such as iron and steel, cement and plate glass.The concrete rectification task to electric power, iron and steel, cement and plate glass four emphasis pollution control industries is proposed especially in the atmosphere pollution undertaking treatment within a prescribed limit of time scheme of Jing-jin-ji region, the Yangtze River Delta and Pearl River Delta.Wherein the transformation market of steel industry is the most considerable, and estimate 2015-2020, iron and steel fume treatment transformation of facility market can reach 16,000,000,000 yuan.The temperature of conventional scr denitration reaction is 280 ~ 420 DEG C, but the flue-gas temperature of many Industrial Boilers is lower, usually less than 200 DEG C, although middle low-temperature denitration catalyst been has has been researched and developed in market, but at this temperature, NH3 can react with the SO3 in flue gas and generate a kind of stickum, blocking catalyst hole, reduces catalyst performance.In power industry, when performing low-load running of machine set, lower than 280 DEG C, equally also there is this problem in flue-gas temperature, SCR reactor of now usually stopping using, and pollutant emission can exceed standard.
Utility model content:
The technical problems to be solved in the utility model is, provides a kind of and is applicable to lower temperature, long service life, efficiency is high, use cost is low industrial furnace smoke SCR denitration system.
For solving the problems of the technologies described above, technical solutions of the utility model are, the denitration dust removal system of industrial furnace smoke, is characterized in that, comprise calcium hydroxide injection apparatus, flue gas mixing arrangement, deduster, ammonia-gas spraying device, fluidized-bed reactor; Calcium hydroxide injection apparatus, flue gas mixing arrangement are arranged on the admission line of high-efficiency dust remover respectively, the outlet of deduster is connected with the inlet flue duct of reactor, and being separately installed with guiding device, be provided with ash bucket below this flue, ammonia-gas spraying device and current equalizer are arranged on the gas approach of reactor; Fluidized-bed reactor inside is provided with porous plate for placing catalyst granules, reactor is furnished with and feeds in raw material for catalyst and the hole of discharging.
Further, fluidized-bed reactor inside arranges one or more layers catalyst.
Further, the primary active material of the catalyst used is V
2o
5-WO
3or V
2o
5-MoO
3.
Further, be included in Industrial Stoves flue and temperature measuring equipment and SO are installed
3checkout gear, several just to fire coal boiler fume flow to nozzle.
Deduster can be selected according to actual conditions, can be sack cleaner, electric cleaner or ceramic filter etc.
Utilize the denitration dust collecting method of the industrial furnace smoke of device of the present utility model, the steps include: 1) in Industrial Stoves flue, the SO3 in calcium hydroxide removal flue gas is sprayed to flue gas, the calcium sulfite particles of generation is retained by high-efficiency dust remover together with dust in flue gas; 2) flue gas after dedusting, through fluidized-bed reactor, carries out denitration with ammonia gas react, thus completes dedusting and denitration under the effect of catalyst.
Described calcium hydroxide injection apparatus comprise SO3 detection system, several just to the calcium hydroxide injection nozzle and Control Nozzle discharge rate system etc. of flue gas flow direction, Control Nozzle discharge rate system according to the size of SO3 concentration in flue gas and temperature automatic decision the need of the amount spraying into calcium hydroxide and calcium hydroxide.When temperature sprays calcium hydroxide lower than needing when 240 DEG C, the amount of calcium hydroxide is determined according to SO3 concentration, and be set as 3 ~ 5 times of theoretical consumption, SO3 Absorbable organic halogens controls within 10ppm.
The utility model beneficial effect, in the SCR denitration system of above-mentioned industrial furnace smoke, by spraying calcium hydroxide before deduster, SO3 in flue gas is absorbed, the calcium sulfite generated is retained by deduster, avoid SO3 and NH3 reaction at low temperatures to generate sulphur ammonium and negative effect is caused to denitrating technique, owing to have employed high-efficiency dust remover, precision processing is carried out to particle, house outlet does not almost have dust, thus effectively prevent the catalyst poisoning in fluid bed and corrosion, the not only service life of extending catalyst, and reduce use cost; Compared with modularization catalyst, adopt mobile catalyst pressure to lose little, and catalyst use amount can be reduced, increase the contact area of catalyst and flue gas, improve denitration efficiency, and then save operating cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Explain for the denitration of steel industry sinter fume, Fig. 1 is the structural representation of this device, and as shown in the figure, this system mainly comprises calcium hydroxide injection apparatus 1, flue gas mixing arrangement 2 and 10, sack cleaner 3, ammonia-gas spraying device 9, fluidized-bed reactor 13.Calcium hydroxide injection apparatus 1, flue gas mixing arrangement 2 arrange on the admission line of sack cleaner 3 respectively, the exhaust pass 5 of deduster is connected with the inlet flue duct 6 of reactor, and be separately installed with deflector 4,8, be provided with ash bucket 7 below this flue 6, ammonia-gas spraying device 9 and current equalizer 10 are arranged on the gas approach of reactor 13.Reactor 13 inside is provided with the porous plate 12 for placing catalyst granules, reactor 13 is furnished with and feeds in raw material and the manhole 11 of discharging for catalyst.Outlet flue 15, calcium hydroxide injection apparatus 1 comprise SO3 detection system, several just to the nozzle and control system etc. of flue gas flow direction, it can according to the size automatic decision of SO3 concentration in flue gas the need of the amount spraying into calcium hydroxide and calcium hydroxide.Calcium hydroxide injection apparatus comprise SO3 detection system, several just to the nozzle and control system etc. of flue gas flow direction, it can according to the size of SO3 concentration in flue gas and temperature automatic decision the need of the amount spraying into calcium hydroxide and calcium hydroxide.When temperature sprays calcium hydroxide lower than needing when 240 DEG C, the amount of calcium hydroxide is determined according to SO3 concentration, and be set as 3 ~ 5 times of theoretical consumption, SO3 Absorbable organic halogens controls within 10ppm.
In present case, reactor only arranges one deck catalyst granules.Temperature due to sintering device flue gas only has 120 ~ 180 DEG C, if flue-gas temperature is heated to 320 DEG C, re-uses SCR denitration, although technically can be possible, energy consumption be too large; Or employing low-temperature denitration catalyst, but require in flue gas without SO3.In present case, by spraying calcium hydroxide before deduster 3, by the SO3 in flue gas is absorbed, the calcium sulfite generated is retained by deduster 3, avoids SO3 and NH3 reaction at low temperatures to generate sulphur ammonium and causes negative effect to denitrating technique, carried out precision processing owing to have employed high-efficiency dust remover to particle, house outlet does not almost have dust, thus effectively prevent the catalyst agglomeration in fluid bed, poisoning and corrosion, the not only service life of extending catalyst, and reduce use cost; Compared with modularization catalyst, adopt mobile catalyst pressure to lose little, and catalyst use amount can be reduced, increase the contact area of catalyst and flue gas, improve denitration efficiency, and then save operating cost.
Calcium hydroxide is calcium hydroxide suspension or calcium hydroxide solid particle.The specific area of described hydrated lime particle is 28 ~ 40cm
2/ g.
The foregoing is only more excellent embodiment of the present utility model; not in order to limit the utility model; any amendment in all institute dwellings within spirit of the present utility model and principle, equivalent replacement and improvement etc., all should within protection category of the present utility model.
Claims (4)
1. the denitration dust removal system of industrial furnace smoke, is characterized in that, comprises calcium hydroxide injection apparatus, flue gas mixing arrangement, deduster, ammonia-gas spraying device, fluidized-bed reactor; Calcium hydroxide injection apparatus, flue gas mixing arrangement are arranged on the admission line of high-efficiency dust remover respectively, the outlet of deduster is connected with the inlet flue duct of reactor, and being separately installed with guiding device, be provided with ash bucket below this flue, ammonia-gas spraying device and current equalizer are arranged on the gas approach of reactor; Fluidized-bed reactor inside is provided with porous plate for placing catalyst granules, reactor is furnished with and feeds in raw material for catalyst and the hole of discharging.
2. the denitration dust removal system of a kind of industrial furnace smoke according to claim 1, is characterized in that,
Fluidized-bed reactor inside arranges one or more layers catalyst.
3. the denitration dust removal system of industrial furnace smoke according to claim 1, is characterized in that being included in Industrial Stoves flue and installs temperature measuring equipment and SO
3checkout gear, several just to fire coal boiler fume flow to nozzle.
4. the denitration dust removal system of industrial furnace smoke according to claim 1, is characterized in that deduster is sack cleaner, electric cleaner or ceramic filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520601368.3U CN205007830U (en) | 2015-08-11 | 2015-08-11 | Denitration dust pelletizing system of industrial stoves flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520601368.3U CN205007830U (en) | 2015-08-11 | 2015-08-11 | Denitration dust pelletizing system of industrial stoves flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205007830U true CN205007830U (en) | 2016-02-03 |
Family
ID=55206460
Family Applications (1)
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|---|---|---|---|
| CN201520601368.3U Active CN205007830U (en) | 2015-08-11 | 2015-08-11 | Denitration dust pelletizing system of industrial stoves flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205007830U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105148696A (en) * | 2015-08-11 | 2015-12-16 | 南京中电环保科技有限公司 | Denitration and dust removal system and method for industrial kiln gas |
| CN105935518A (en) * | 2016-05-03 | 2016-09-14 | 济钢集团国际工程技术有限公司 | Coke dry quenching novel efficient primary dust collector |
| CN109613170A (en) * | 2018-12-29 | 2019-04-12 | 浙江浙能兰溪发电有限责任公司 | A denitration catalyst performance monitoring device |
-
2015
- 2015-08-11 CN CN201520601368.3U patent/CN205007830U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105148696A (en) * | 2015-08-11 | 2015-12-16 | 南京中电环保科技有限公司 | Denitration and dust removal system and method for industrial kiln gas |
| CN105935518A (en) * | 2016-05-03 | 2016-09-14 | 济钢集团国际工程技术有限公司 | Coke dry quenching novel efficient primary dust collector |
| CN109613170A (en) * | 2018-12-29 | 2019-04-12 | 浙江浙能兰溪发电有限责任公司 | A denitration catalyst performance monitoring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |