CN201832542U - Selective flue gas desulfuration and denitration apparatus for sintering machines - Google Patents
Selective flue gas desulfuration and denitration apparatus for sintering machines Download PDFInfo
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- CN201832542U CN201832542U CN2010206029015U CN201020602901U CN201832542U CN 201832542 U CN201832542 U CN 201832542U CN 2010206029015 U CN2010206029015 U CN 2010206029015U CN 201020602901 U CN201020602901 U CN 201020602901U CN 201832542 U CN201832542 U CN 201832542U
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- Prior art keywords
- flue gas
- bellows
- desulfurization
- digestion zone
- sintering
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- 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.)
- Expired - Lifetime
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000003546 flue gas Substances 0.000 title claims abstract description 51
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 39
- 238000005245 sintering Methods 0.000 title claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000023556 desulfurization Effects 0.000 claims description 33
- 230000029087 digestion Effects 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 4
- 238000002309 gasification Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 15
- 231100000719 pollutant Toxicity 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 9
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 abstract description 8
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- OXSWKJLAKXNIFG-UHFFFAOYSA-N azane sulfuric acid Chemical compound N.N.N.OS(O)(=O)=O OXSWKJLAKXNIFG-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Abstract
The utility model discloses a selective flue gas desulfuration and denitration apparatus for sintering machines, which is used for processing the flue gas exhausted from a bellows of a sintering machine. The bellows comprises a bellows head end, a bellows middle and a bellows tail end which are sequentially arranged, the apparatus comprises a flue gas chiller, a primary deduster, a main exhaust fan, a desulfuration and denitration reactor, a secondary deduster, a desulfuration draught fan and a chimney, the input end of the flue gas chiller is connected to the bellows middle, a digester is arranged in front of the desulfuration and denitration reactor, an activated carbon sprayer is arranged in front of the secondary deduster, and the bellows head end and the bellows tail end are directly connected to the flue gas purification apparatus. The apparatus respectively processes the flue gas of different parts of the bellows, the flue gas chiller arranged at the front end of the primary deduster reduces the temperature of the flue gas to about 130 DEG C, consequently, the apparatus is more suitable for desulfuration and denitration, and enhances the effect of removing combined pollutants, and activated carbon is sprayed to the secondary deduster to remove a variety of pollutants such as heavy metal and dioxin.
Description
[technical field]
The utility model relates to the discharged flue gas purified treatment field to burning institute, relates in particular to the device that steel works sintering machine flue gas is carried out the selective desulfurization denitration.
[technical background]
Sintering flue gas desulfurization is the emphasis and the difficult point of present steel industry efforts at environmental protection." the comprehensive programme of work of energy-saving and emission-reduction " of State Council's issue clearly proposed the Eleventh Five-Year Plan period to realize the goal task of energy-saving and emission-reduction: total emissions of major pollutants reduces 10%; Promptly by 2010, national sulfur dioxide (SO2) emissions total amount reduces to 2,295 ten thousand tons by 2,549 ten thousand tons in 2005.
At present, the steel industry SO2 emissions account for 8% of national industrial sulfur dioxide (SO2) emissions total amount, are only second to the thermoelectricity industry, occupy second.According to investigations, national steel industry sulfur dioxide (SO2) emissions total amount was about 740,000 tons in 2005, about 760,000 tons by 2006; 2007 is 75.64 ten thousand tons, is only than 2006 and has reduced 0.5%; Iron and steel enterprise's SO2 emissions of national emphasis statistics in 2008 are about 1,100,000 tons, and wherein the sintering link is 800,000 tons, accounts for more than 70% of total emission volumn.
By above-mentioned data as can be known, in " 11th Five-Year " preceding 3 years, SO2 emissions did not only realize reducing discharging on basis in 2005, and having on the contrary to a certain degree increases.And by in by the end of May, 2009, China only forms 8.2 ten thousand tons of sintering flue gas desulfurization abilities, so it is very severe to reduce discharging situation.
Up to now, the propelling of sintering flue gas desulfurization work is still slow, and denitration does not also start, and traces it to its cause, and mainly contains three: one, because investment is big, operating cost is high.The 2nd, original steel mill does not consider flue gas desulfurization, denitration, causes this place anxiety, difficult arrangement.The 3rd, because in the present power industry flue gas desulfurization technique, technical barriers such as equipment corrosion is serious, obstruction, the difficult dehydration of gypsum, wastewater treatment difficulty have appearred in the limestone/gypsum wet method that accounts for main flow in the sintering sector application; And ammonia-ammonium sulfate method is except the danger that raw material ammonia exist to be leaked, because the moisture-absorption characteristics and the nominal particle size of sulphur ammonium, the desulfurization after funnel is prone to and emits white cigarette phenomenon; Also have active carbon/activated coke method, though have the comprehensive remove of combined pollutant, one-time investment and operating cost height, at present, large tracts of land is promoted difficult.
Domestic, there had been some to conduct a research aspect sinter fume pollutant removing technology and the device, as notification number is the patent of CN201302374Y, sintering device flue gas has been carried out selective desulfurization, reduced equipment and use cost, but it can't be to the cooperation-removal that carries out of combined pollutants such as NOx, dioxin and heavy metal; As notification number is the patent of invention of CN101306311A, can realize combined pollutant cooperation-removals such as multiple sour gas, heavy metal, dioxin in the sinter fume, but also can't effectively remove NOx, and what adopt is full flue gas removing process that cost is very high.Equally, notification number is the patent of invention of CN101254394A, though can realize combined pollutant cooperation-removals such as multiple sour gas, NOx, heavy metal, dioxin in the sinter fume, adopt full flue gas to carry out desulfurization and dedusting after the denitration and handle, so cost is also very high.
[utility model content]
The purpose of this utility model is exactly in order to solve problems of the prior art, a kind of sintering device flue gas selective desulfurization denitrification apparatus is proposed, not only can carry out selectively removing, and can reduce investment and operating cost, and can improve desulfurized effect pollutant.
For achieving the above object, the utility model patent has proposed a kind of sintering device flue gas selective desulfurization denitrification apparatus, is used for the desulphurization denitration of middle part bellows flue gas of sintering machine and the cooperation-removal of other combined pollutant.This device comprises flue gas chiller, primary dust removing device, main exhauster, desulfurization and denitrification reaction device, secondary ash collector, desulfurization air-introduced machine and the chimney that connects successively, the input of described flue gas chiller is connected to the bellows middle part, the front portion of desulfurization and denitrification reaction device is provided with digester, the front portion of secondary ash collector is provided with the active carbon injection apparatus, and bellows head end and bellows end are directly connected to the gas cleaning treatment facility.
As preferably, described digester is stepped three grades of digesters, comprises elementary digestion zone, coupling digestion zone and catapepsis district, and is simple in structure, digests effective.
As preferably, the front portion of described elementary digestion zone is provided with 2 charging apertures, the rear portion in catapepsis district is provided with 1 discharging opening, the top of described elementary digestion zone is provided with first water injector, the top of coupling digestion zone is provided with second water injector and additive filling apparatus, be equipped with agitating device in described elementary digestion zone, coupling digestion zone and the catapepsis district, rational in infrastructure, the composite desulfate denitration absorbent that makes has the big (15～25m of surface area
2/ g), active high characteristics.
As preferably, the summation of the exhaust gas volumn of the exhaust gas volumn of described middle part bellows and bellows head end and bellows end is suitable, can either make the pollutant qualified discharge, can farthest reduce cost again, though be to come expression characteristic herein with exhaust gas volumn, but in fact architectural feature is represented the quantity that is connected to the flue gas chiller and is directly connected to the bellows of gas cleaning treatment facility.
As preferably, described secondary ash collector adopts electric-bag complex dust collector, to alleviate the erosive wear that the abrasion dust produces filter bag.
As preferably, be connected with gasification groove, metering batcher and humidifier between the solid output of described secondary ash collector and the desulfurization and denitrification reaction device in turn, realize containing the recycling of composite absorber solid material.
The beneficial effect of the utility model patent: the utility model is done differentiated treatment to the flue gas of diverse location bellows, to SO
2, the lower head end of NOx isoconcentration and the flue gas of terminal bellows directly carry out dust removal process to purification apparatus; To SO
2, the flue gas that produces of the higher middle part bellows of NOx, dioxin isoconcentration carries out desulphurization denitration and straight cooperation-removal of disliking combined pollutants such as English is handled, front end at the primary dust removing device is provided with the flue gas chiller, flue-gas temperature is dropped to about 130 ℃, being more suitable for desulphurization denitration handles, improved removal effect, spraying active carbon in the secondary ash collector porch removes in the lump to multiple pollutants such as heavy metal, dioxin, the utility model has reduced investment and operating cost, and equipment takes up an area of little, arrangement convenience.
[description of drawings]
Fig. 1 is the structural representation of a kind of sintering device flue gas selective desulfurization of the utility model denitrification apparatus;
Fig. 2 is the structural representation of digester in a kind of sintering device flue gas selective desulfurization of the utility model denitrification apparatus.
[specific embodiment]
As shown in Figure 1, sintering device flue gas selective desulfurization denitrification apparatus is used for the processing that sintering machine wind box produces flue gas, and described bellows comprise bellows head end 21, bellows middle part 22 and the bellows end 23 that sets gradually.This device comprises flue gas chiller 1, primary dust removing device 2, main exhauster 3, desulfurization and denitrification reaction device 5, secondary ash collector 7, desulfurization air-introduced machine 8 and the chimney 9 that connects successively, the input of described flue gas chiller 1 is connected to the middle part bellows 22 of sintering machine, the front portion of desulfurization and denitrification reaction device 5 is provided with digester 4, the front portion of secondary ash collector 7 is provided with active carbon injection apparatus 6, and bellows head end 21 and bellows end 23 are directly connected to gas cleaning dust removal process equipment.Front end at primary dust removing device 2 is provided with flue gas chiller 1, and flue-gas temperature is dropped to about 130 ℃, is more suitable for the associated treatment of desulphurization denitration and combined pollutant; The outlet temperature of secondary ash collector 7 is controlled at 85 ℃～105 ℃.The summation of the exhaust gas volumn of the exhaust gas volumn of described middle part bellows 22 and bellows head end 21 and bellows end 23 is suitable, respectively accounts for about 50% of total exhaust gas volumn, can either make all contaminations qualified discharge, can farthest reduce investment and operating cost again.Though be to come expression characteristic with exhaust gas volumn herein, in fact architectural feature represents to be connected to flue gas chiller 1 and the export volume that is directly connected to the bellows of gas cleaning dust removal process equipment.Described secondary ash collector 7 adopts electric-bag complex dust collector, to alleviate the erosive wear that the abrasion dust produces filter bag.Be connected with gasification groove 10, metering batcher 11 and humidifier 12 between the solid output of described secondary ash collector 7 and the desulfurization and denitrification reaction device 5 in turn, realize containing the recycling of desulphurization denitration composite absorber solid material.
Select higher, the SO of temperature of sintering machine middle part bellows
2Reach the higher flue gas of NOx concentration as handling object,, remove the SO in the flue gas by adding compound desulfurization, denitration absorbent and active carbon
2, NOx and other be as combined pollutants such as dioxin, wherein, SO
2Removal efficiency can reach 80%-95%, and can remove most SO simultaneously
3, acidic components such as HCL, HF, the clearance of NOx reaches 30%-50%, the regulation of national standard is satisfied in the discharging of heavy metal, dioxin etc.
As shown in Figure 2, described digester 4 is stepped three grades of digesters, comprises elementary digestion zone 41, coupling digestion zone 42 and catapepsis district 43.The front portion of described elementary digestion zone 41 is provided with 2 charging apertures 44, the rear portion in catapepsis district 43 is provided with 1 discharging opening, the top of described elementary digestion zone 41 is provided with the first water injector (not shown), the top of coupling digestion zone 42 is provided with the second water injector (not shown) and additive filling apparatus (not shown), be equipped with agitating device 45 in described elementary digestion zone 41, coupling digestion zone 42 and the catapepsis district 43, rational in infrastructure, the composite desulfate denitration absorbent that makes has the big (15～25m of surface area
2/ g), active high characteristics.Sulfur-removing additives adopts quick lime, and the denitration additive is by KMnO
4And Ca (ClO)
2Form, its weight is respectively 10%～15% of the quick lime weight that adds digester 4.According to the difference in digestive function district, select different stirring patterns, the running temperature in elementary digestion zone 41, coupling digestion zone 42, catapepsis district 43 is respectively 85 ℃～105 ℃, 80 ℃～100 ℃, 70 ℃～95 ℃.
The foregoing description is to explanation of the present utility model, is not to qualification of the present utility model, any scheme after the utility model simple transformation is all belonged to protection domain of the present utility model.
Claims (5)
1. sintering device flue gas selective desulfurization denitrification apparatus, the bellows flue gas that is used for sintering machine is handled, described bellows comprise the bellows head end that sets gradually, bellows middle part and bellows end, it is characterized in that: this device comprises the flue gas chiller that connects successively, the primary dust removing device, main exhauster, the desulfurization and denitrification reaction device, secondary ash collector, desulfurization air-introduced machine and chimney, the input of described flue gas chiller is connected to the bellows middle part, the front portion of desulfurization and denitrification reaction device is provided with digester, the front portion of secondary ash collector is provided with the active carbon injection apparatus, and the terminal flue gas of bellows head end and bellows is directly connected to the gas cleaning treatment facility.
2. a kind of sintering device flue gas selective desulfurization denitrification apparatus as claimed in claim 2, it is characterized in that: described digester comprises elementary digestion zone, coupling digestion zone and catapepsis district, the front portion of elementary digestion zone is provided with 2 charging apertures, the rear portion in catapepsis district is provided with 1 discharging opening, the top of described elementary digestion zone is provided with first water injector, the top of coupling digestion zone is provided with second water injector and additive filling apparatus, is equipped with agitating device in described elementary digestion zone, coupling digestion zone and the catapepsis district.
3. a kind of sintering device flue gas selective desulfurization denitrification apparatus as claimed in claim 1 is characterized in that: the summation of the exhaust gas volumn at described bellows middle part and the exhaust gas volumn of bellows head end and bellows end is suitable.
4. a kind of sintering device flue gas selective desulfurization denitrification apparatus as claimed in claim 1 is characterized in that: described secondary ash collector adopts electric-bag complex dust collector.
5. a kind of sintering device flue gas selective desulfurization denitrification apparatus as claimed in claim 1 is characterized in that: be connected with gasification groove, metering batcher and humidifier between the solid output of described secondary ash collector and the desulfurization and denitrification reaction device in turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206029015U CN201832542U (en) | 2010-11-05 | 2010-11-05 | Selective flue gas desulfuration and denitration apparatus for sintering machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206029015U CN201832542U (en) | 2010-11-05 | 2010-11-05 | Selective flue gas desulfuration and denitration apparatus for sintering machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201832542U true CN201832542U (en) | 2011-05-18 |
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ID=44002638
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|---|---|---|---|
| CN2010206029015U Expired - Lifetime CN201832542U (en) | 2010-11-05 | 2010-11-05 | Selective flue gas desulfuration and denitration apparatus for sintering machines |
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| CN (1) | CN201832542U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901365A (en) * | 2011-07-27 | 2013-01-30 | 宝山钢铁股份有限公司 | Low-energy-consumption method for reducing emission of dioxin in sintering waste gas |
| CN103148494A (en) * | 2012-08-15 | 2013-06-12 | 于海涛 | Chimney-free device for boiler |
| CN103736381A (en) * | 2013-12-24 | 2014-04-23 | 航天环境工程有限公司 | Dust removal device and dust removal method for sintering flue gas by shunted and graded desulfurization |
| CN105435545A (en) * | 2015-12-03 | 2016-03-30 | 上海交通大学 | Comprehensive processing technology for conducting deep dust removal, denitration and desulphurization on glass kiln smoke |
| CN106399674A (en) * | 2016-11-28 | 2017-02-15 | 华北理工大学 | A kind of sintering gasification dephosphorization recovery method |
| CN112973428A (en) * | 2021-04-07 | 2021-06-18 | 北京清新环境技术股份有限公司 | Device for removing sulfur trioxide in flue gas of sintering machine |
-
2010
- 2010-11-05 CN CN2010206029015U patent/CN201832542U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901365A (en) * | 2011-07-27 | 2013-01-30 | 宝山钢铁股份有限公司 | Low-energy-consumption method for reducing emission of dioxin in sintering waste gas |
| CN102901365B (en) * | 2011-07-27 | 2015-04-22 | 宝山钢铁股份有限公司 | Low-energy-consumption method for reducing emission of dioxin in sintering waste gas |
| CN103148494A (en) * | 2012-08-15 | 2013-06-12 | 于海涛 | Chimney-free device for boiler |
| CN103736381A (en) * | 2013-12-24 | 2014-04-23 | 航天环境工程有限公司 | Dust removal device and dust removal method for sintering flue gas by shunted and graded desulfurization |
| CN105435545A (en) * | 2015-12-03 | 2016-03-30 | 上海交通大学 | Comprehensive processing technology for conducting deep dust removal, denitration and desulphurization on glass kiln smoke |
| CN106399674A (en) * | 2016-11-28 | 2017-02-15 | 华北理工大学 | A kind of sintering gasification dephosphorization recovery method |
| CN112973428A (en) * | 2021-04-07 | 2021-06-18 | 北京清新环境技术股份有限公司 | Device for removing sulfur trioxide in flue gas of sintering machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110518 |
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