CN105148696A - Denitration and dust removal system and method for industrial kiln gas - Google Patents
Denitration and dust removal system and method for industrial kiln gas Download PDFInfo
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- CN105148696A CN105148696A CN201510490961.XA CN201510490961A CN105148696A CN 105148696 A CN105148696 A CN 105148696A CN 201510490961 A CN201510490961 A CN 201510490961A CN 105148696 A CN105148696 A CN 105148696A
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- calcium hydroxide
- flue gas
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Abstract
The invention discloses a denitration and dust removal method for industrial kiln gas. The method comprises steps as follows: 1), slaked lime is sprayed to flue gas in a flue of an industrial kiln to remove SO3 in the flue gas, and generated calcium sulfite particles and dust in the flue gas are intercepted by a high-efficient dust remover; 2), the flue gas after dust removal passes through a fluidized bed reactor, has a reaction with ammonia gas for denitration under the action of a catalyst, and accordingly, dust removal and denitration are completed. A system comprises a slake lime spraying device, a flue gas mixing device, the high-efficient dust remover, an ammonia gas spraying device and the fluidized bed reactor, wherein the slaked lime spraying device and the flue gas mixing device are arranged on a gas inlet pipeline of the high-efficient dust remover respectively, and the ammonium gas spraying device and an current equalizer are both mounted on an inlet flue of the reactor.
Description
Technical field:
The present invention relates to a kind of Industrial Stoves tails dedusting denitration technology field, be 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.
Summary of the invention:
The technical problem to be solved in the present invention 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 and method.
For solving the problems of the technologies described above, the invention provides a kind of denitration dust collecting method of industrial furnace smoke, 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.
High-efficiency dust remover can be selected according to actual conditions, can be sack cleaner, electric cleaner or ceramic filter etc.
The denitration dust removal system of industrial furnace smoke, comprises calcium hydroxide injection apparatus, flue gas mixing arrangement, high-efficiency dust remover, 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 be separately installed with guiding device, be provided with (taper) ash bucket below this flue, ammonia-gas spraying device and current equalizer are arranged on the gas approach of fluidized-bed 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.
Fluidized-bed reactor inside arranges one or more layers catalyst.
The primary active material of the catalyst used is V2O5-WO3 or V2O5-MoO3.
Beneficial effect of the present invention, 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.The features such as crushing of the present invention is little, efficiency is high, operating cost is low; Complete equipment is compact, structure is simple, use cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of denitration dust removal system of the present invention.
Detailed description of the invention
Explain for the denitration of steel industry sinter fume, Fig. 1 is the structural representation of this device, 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, outlet flue 15.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.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 invention, not in order to limit the present invention, any amendment in all institutes within the spirit and principles in the present invention dwelling, equivalent replacement and improvement etc., all should within protection category of the present invention.
Claims (8)
1. a denitration dust collecting method for industrial furnace smoke, is characterized in that step is: 1) flue gas spray calcium hydroxide is removed to the SO3 in flue gas in Industrial Stoves flue, 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, enters denitration with ammonia gas react under the effect of catalyst, thus completes dedusting and denitration.
2. the denitration dust collecting method of industrial furnace smoke according to claim 1, is characterized in that, described calcium hydroxide injection apparatus comprises SO
3detection 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 is according to SO in flue gas
3the size of concentration and temperature automatic decision are the need of the amount spraying into calcium hydroxide and calcium hydroxide.
3. the denitration dust removal system of industrial furnace smoke, is characterized in that, comprises calcium hydroxide injection apparatus, flue gas mixing arrangement, high-efficiency dust remover, 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.
4. the denitration dust removal system of industrial furnace smoke according to claim 3, is characterized in that,
Fluidized-bed reactor inside arranges one or more layers catalyst.
5. the denitration dust removal system of industrial furnace smoke according to claim 3, is characterized in that, the active material of the catalyst used is V
2o
5-WO
3or V
2o
5-MoO
3.
6. the denitration dust removal system of industrial furnace smoke according to claim 3, is characterized in that installing temperature measuring equipment and SO in Industrial Stoves flue
3checkout gear and several just to fire coal boiler fume flow to calcium hydroxide injection nozzle.
7. the denitration dust removal system of industrial furnace smoke according to claim 3, is characterized in that described calcium hydroxide is calcium hydroxide suspension or calcium hydroxide solid particle; The specific area of described hydrated lime particle is 28 ~ 40cm
2/ g.
8. the denitration dust removal system of industrial furnace smoke according to claim 3, is characterized in that, deduster is sack cleaner, electric cleaner or ceramic filter.
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| CN201510490961.XA CN105148696A (en) | 2015-08-11 | 2015-08-11 | Denitration and dust removal system and method for industrial kiln gas |
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| CN201510490961.XA CN105148696A (en) | 2015-08-11 | 2015-08-11 | Denitration and dust removal system and method for industrial kiln gas |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106110873A (en) * | 2016-08-23 | 2016-11-16 | 华电电力科学研究院 | Combine before and after removing SCR denitration device SO in flue gas3and the device of flue dust |
| CN106110872A (en) * | 2016-08-23 | 2016-11-16 | 华电电力科学研究院 | Combine SO in removing SCR denitration device inlet flue gas3and the device of flue dust |
| CN106215696A (en) * | 2016-09-22 | 2016-12-14 | 中冶焦耐(大连)工程技术有限公司 | Flue gases of cock oven SCR denitration is anti-blocking, Method of blockage removal and device |
| CN107008144A (en) * | 2017-05-23 | 2017-08-04 | 国电科学技术研究院 | A kind of device and denitration method for flue gas for realizing SCR denitrating flue gas multistage spray ammonia |
| CN107243253A (en) * | 2017-05-18 | 2017-10-13 | 安徽威达环保科技股份有限公司 | A kind of flue gas of glass melting furnace multi-pollutant combined apparatus and technique |
| CN107854997A (en) * | 2017-10-11 | 2018-03-30 | 安徽威达环保科技科技股份有限公司 | A kind of flue gases of cock oven multi-pollutant dry cleaning device and technique |
| CN107961654A (en) * | 2017-11-28 | 2018-04-27 | 国家电投集团远达环保催化剂有限公司 | A kind of modular flue gas desulfurization and dedusting denitrification integral processing system |
| CN109569292A (en) * | 2017-09-28 | 2019-04-05 | 中国石油化工股份有限公司 | The ozone Oxidation Treatment device and processing method of exhaust gas and waste water |
| CN110339686A (en) * | 2018-04-03 | 2019-10-18 | 中国电力工程顾问集团华北电力设计院有限公司 | By removing SO3It realizes full load denitration and improves the method and device of boiler efficiency |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT382793B (en) * | 1985-01-29 | 1987-04-10 | Waagner Biro Ag | Process for separating pollutants out of combustion waste gases, and device for carrying out the process |
| JPH11114366A (en) * | 1997-10-01 | 1999-04-27 | Sumitomo Heavy Ind Ltd | Treatment of released gas in waste gas treating device for refuse incinerator |
| CN101332400A (en) * | 2008-07-18 | 2008-12-31 | 朱学智 | Method for spraying calcium and devulcanizing in circulating fluid-bed boiler using PLC control system |
| CN101797472A (en) * | 2009-05-04 | 2010-08-11 | 上海蓝鸟环境科技发展有限公司 | Smoke processing technology |
| CN102019142A (en) * | 2009-09-18 | 2011-04-20 | 三菱重工环境·化学工程株式会社 | Exhaust treatment method |
| CN202621023U (en) * | 2012-07-08 | 2012-12-26 | 周曰 | Smoke denitration device |
| CN203170167U (en) * | 2012-11-23 | 2013-09-04 | 广东依科电力技术有限公司 | Flue gas purification and desulfurization system |
| CN203990305U (en) * | 2014-06-10 | 2014-12-10 | 湖南正明环境工程有限公司 | A kind of multidirectional injection SNCR adds individual layer SCR denitrating system |
| CN204073815U (en) * | 2014-06-10 | 2015-01-07 | 宁夏亿达泰环保设备有限公司 | A kind of integrated fume denitration desulfurization dust-removal system |
| CN104785245A (en) * | 2015-04-03 | 2015-07-22 | 中国建筑材料科学研究总院 | Denitration catalyst, preparation method thereof as well as flue gas denitration method |
| CN205007830U (en) * | 2015-08-11 | 2016-02-03 | 南京中电环保科技有限公司 | Denitration dust pelletizing system of industrial stoves flue gas |
-
2015
- 2015-08-11 CN CN201510490961.XA patent/CN105148696A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT382793B (en) * | 1985-01-29 | 1987-04-10 | Waagner Biro Ag | Process for separating pollutants out of combustion waste gases, and device for carrying out the process |
| JPH11114366A (en) * | 1997-10-01 | 1999-04-27 | Sumitomo Heavy Ind Ltd | Treatment of released gas in waste gas treating device for refuse incinerator |
| CN101332400A (en) * | 2008-07-18 | 2008-12-31 | 朱学智 | Method for spraying calcium and devulcanizing in circulating fluid-bed boiler using PLC control system |
| CN101797472A (en) * | 2009-05-04 | 2010-08-11 | 上海蓝鸟环境科技发展有限公司 | Smoke processing technology |
| CN102019142A (en) * | 2009-09-18 | 2011-04-20 | 三菱重工环境·化学工程株式会社 | Exhaust treatment method |
| CN202621023U (en) * | 2012-07-08 | 2012-12-26 | 周曰 | Smoke denitration device |
| CN203170167U (en) * | 2012-11-23 | 2013-09-04 | 广东依科电力技术有限公司 | Flue gas purification and desulfurization system |
| CN203990305U (en) * | 2014-06-10 | 2014-12-10 | 湖南正明环境工程有限公司 | A kind of multidirectional injection SNCR adds individual layer SCR denitrating system |
| CN204073815U (en) * | 2014-06-10 | 2015-01-07 | 宁夏亿达泰环保设备有限公司 | A kind of integrated fume denitration desulfurization dust-removal system |
| CN104785245A (en) * | 2015-04-03 | 2015-07-22 | 中国建筑材料科学研究总院 | Denitration catalyst, preparation method thereof as well as flue gas denitration method |
| CN205007830U (en) * | 2015-08-11 | 2016-02-03 | 南京中电环保科技有限公司 | Denitration dust pelletizing system of industrial stoves flue gas |
Non-Patent Citations (1)
| Title |
|---|
| 韦正乐等: "烟气NO_x低温选择性催化还原催化剂研究进展", 《化工进展》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106110873A (en) * | 2016-08-23 | 2016-11-16 | 华电电力科学研究院 | Combine before and after removing SCR denitration device SO in flue gas3and the device of flue dust |
| CN106110872A (en) * | 2016-08-23 | 2016-11-16 | 华电电力科学研究院 | Combine SO in removing SCR denitration device inlet flue gas3and the device of flue dust |
| CN106215696A (en) * | 2016-09-22 | 2016-12-14 | 中冶焦耐(大连)工程技术有限公司 | Flue gases of cock oven SCR denitration is anti-blocking, Method of blockage removal and device |
| CN107243253A (en) * | 2017-05-18 | 2017-10-13 | 安徽威达环保科技股份有限公司 | A kind of flue gas of glass melting furnace multi-pollutant combined apparatus and technique |
| CN107008144A (en) * | 2017-05-23 | 2017-08-04 | 国电科学技术研究院 | A kind of device and denitration method for flue gas for realizing SCR denitrating flue gas multistage spray ammonia |
| CN109569292A (en) * | 2017-09-28 | 2019-04-05 | 中国石油化工股份有限公司 | The ozone Oxidation Treatment device and processing method of exhaust gas and waste water |
| CN109569292B (en) * | 2017-09-28 | 2021-09-07 | 中国石油化工股份有限公司 | Ozone oxidation treatment device and treatment method for waste gas and waste water |
| CN107854997A (en) * | 2017-10-11 | 2018-03-30 | 安徽威达环保科技科技股份有限公司 | A kind of flue gases of cock oven multi-pollutant dry cleaning device and technique |
| CN107961654A (en) * | 2017-11-28 | 2018-04-27 | 国家电投集团远达环保催化剂有限公司 | A kind of modular flue gas desulfurization and dedusting denitrification integral processing system |
| CN110339686A (en) * | 2018-04-03 | 2019-10-18 | 中国电力工程顾问集团华北电力设计院有限公司 | By removing SO3It realizes full load denitration and improves the method and device of boiler efficiency |
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