CN209541450U - A kind of comprehensive treatment of sintering flue gas and the system of utilizing - Google Patents
A kind of comprehensive treatment of sintering flue gas and the system of utilizing Download PDFInfo
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- CN209541450U CN209541450U CN201821986444.7U CN201821986444U CN209541450U CN 209541450 U CN209541450 U CN 209541450U CN 201821986444 U CN201821986444 U CN 201821986444U CN 209541450 U CN209541450 U CN 209541450U
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- 239000003546 flue gas Substances 0.000 title claims abstract description 100
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 90
- 238000005245 sintering Methods 0.000 title claims abstract description 46
- 238000000605 extraction Methods 0.000 claims abstract description 31
- 239000000571 coke Substances 0.000 claims abstract description 21
- 238000010791 quenching Methods 0.000 claims abstract description 18
- 230000000171 quenching Effects 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 230000003009 desulfurizing Effects 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 9
- 230000011218 segmentation Effects 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims 1
- 229910002089 NOx Inorganic materials 0.000 abstract description 20
- 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 15
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 27
- 238000000034 method Methods 0.000 description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 9
- 239000004615 ingredient Substances 0.000 description 8
- 239000000779 smoke Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000004064 recycling Methods 0.000 description 5
- 238000004523 catalytic cracking Methods 0.000 description 4
- 230000033116 oxidation-reduction process Effects 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 206010022000 Influenza Diseases 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitrogen oxide Substances O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920002456 HOTAIR Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000007233 catalytic pyrolysis Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052813 nitrogen oxide Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 238000009865 steel metallurgy Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Abstract
The utility model discloses a kind of comprehensive treatment of sintering flue gas and the system of utilizing, the bellows segmentation on pallet is communicated with the first flue and the second flue；First flue has been sequentially communicated third dust-extraction unit, the second air-introduced machine, combustion system, the second heat-exchanger rig, desulfurization and denitrification reaction device, the 4th dust-extraction unit and chimney；Second flue has been sequentially communicated the first dust-extraction unit, the first air-introduced machine, dry coke quenching reacting furnace, the first heat-exchanger rig, the second dust-extraction unit and flue gas separation unit.This system can be by flue gas according to O2、H2O、NOx、COx、SO2And the concentration difference of dioxin is collected in the first flue and the second flue respectively, is then respectively processed according to the property of flue gas, realizes to SO in sintering flue gas2、NOx, CO, the multiple pollutants such as dioxin comprehensive treatment；And it can thermal energy and CO to flue gasxIt is recycled.
Description
Technical field
The utility model relates to a kind of waste gas pollution control and treatment and the system that utilizes, especially a kind of comprehensive treatment of sintering flue gas with
Utilize system.
Background technique
Iron ore powder sintering process is the major source of field of steel metallurgy flue gas emission.Sintering flue gas is atmosphere environment protection treating
Key object, be mainly characterized by: 1. smoke discharge amount is big, the ton sinter flue gas emission of large and medium-sized sintering machine domestic at present
Amount is about 1500~4500Nm3/t；2. the humidity of flue gas high (6~13%), dust concentration height (50~200mg/Nm before administering3),
Temperature height (150~180 DEG C)；3. gaseous pollutant complicated component, contains SO2、NOx, HF, HCl, dioxin PCDD/Fs and
COxEqual multiple pollutants.Particulate matter, SO in sintering flue gas2Emission reduction administer there are many technology of mature application, but NOx、
The removing of dioxin and COxEmission reduction be still sintering flue gas administer weak link.Mainstream sintering flue gas Treatment process at present
The shortcomings that also: (1) large-scale desulfuring and denitrifying apparatus need to be built, one-time investment is big, and operating cost is high；(2) fume afterheat
Resource does not obtain abundant, reasonable recycling.
Publication number CN104988264A discloses a kind of method sintering flue gas processing and utilized, concrete thought are as follows: utilizes
Hot-blast stove replaces air to spray into blast-furnace tuyere after the sintering flue gas after dedusting is heated to 1000~1400 DEG C, using in blast furnace
SO in high temperature, reducing atmosphere removing flue gas2、NOxWith dioxin etc., and realize obvious heat of smoke, CO, CO2In blast furnace ironmaking
Recycling.But the disadvantages of this method are: 1. SO in flue gas2It fully enters in blast-furnace slag and molten iron, increases blast furnace sulphur analysis
With the burden of subsequent desulfurizing iron；It, can be to slag properties 2. HF, HCl and heavy metal element largely enter blast furnace process system
It is adversely affected with the life of the blast furnace；3. need to strictly be controlled to ensure blast furnace crucibe thermal energy and Tuyere Raceway theoretical maximum temperature
H in sintering flue gas processed2O and CO2Upper limit content, constrain the treating capacity of sintering flue gas.
Publication number CN101532782A discloses a kind of sintering gas purifying and waste heat reclaiming process, technical solution are:
Sintering flue gas mixes after blower pressurizes, through regulating valve with the hot-air from air preheater, then passes through First air
Pipe and secondary air channel are sent into boiler hearth of circulating fluidized bed, participate in the fluidisation and burning of circulating fluidized bed boiler, lime stone and coal
By strength feeding device be sent into burner hearth, wherein lime stone in boiler hearth of circulating fluidized bed can in sintering flue gas
SO2It reacts and realizes desulfurization, purified flue gas passes through circulating fluidized bed boiler heat exchanger, flue gas purification system, air preheat
Device, exhaust blower and chimney discharge.Its feature includes: the active CaO removing SO 1. gone out using decomposition of limestone in boiler furnace2；
2. utilizing the reducing atmosphere of boiler combustion zone and the spray ammonia effect removing NO of burner hearth raising sectionx；3. the hot environment in burner hearth
It is lower to realize the removing of dioxin, hydrocarbon, tar by decomposing, burning；4. burning after lime-ash it is adsorbable, absorb fluorine,
The harmful components such as chlorine and heavy metal element.
Publication number CN102895873A, which is disclosed, " while removing sulfureous in flue gas oxide, nitrogen oxides and carbon monoxide
Method ", for petrochemical industry catalytic cracking unit gas pollutant administer, technical solution is: catalytic cracking again
After raw device, oxidation-reduction reactor is set before or after flue gas turbine expander, reducibility gas and catalytic cracking regenerator are produced
Raw high temperature regeneration flue gas is sent into oxidation-reduction reactor, will under conditions of oxidation reduction catalyst, normal pressure, 500~650 DEG C
SO in flue gasx、NOxIt is reduced to elemental sulfur and nitrogen；Mixed flue gas after reaction is arranged after energy recycling system heat exchange cooling
Elemental sulfur collector, is stripped of SO laterx、NOxFall with the flue gas of CO through smoke stack emission.This method can remove in dry gas simultaneously
SO in hydrogen sulfide and catalytic pyrolysis regenerated flue gasx、NOxAnd the sulphur of two strands of gas is recycled in CO, the treatment of wastes with processes of wastes against one another, simplifies catalytic cracking
The process of device pollutant control.The distinguishing feature of this method is: the 1. SO of the principle removing flue gas based on catalysis reductionx、NOx、
The components such as CO；2. needing the oxidation reduction catalyst using supported rare earth on inorganic oxide carrier and transition metal and wanting
Consume additional reducibility gas (such as CO, H2、H2S, CxHy(x≤4) one or more)；3. smoke components and sintering flue gas
There are very big difference, the O of the flue gas2, CO content is low and CO2Content is high.
Using it is disclosed above or industrialized smoke gas treatment system processing sintering flue gas when, it is innoxious, inexpensive,
There are still significant insufficient for resource and reusing of energy source etc..
Utility model content
The technical problem to be solved by the present invention is to provide a kind of comprehensive treatments of sintering flue gas and the system of utilizing, and realize
The comprehensive treatment of multiple pollutant and the flue gas energy and CO under lower costxEfficient recycling.
In order to solve the above technical problems, technical solution adopted in the utility model is: the bellows segmentation on pallet
It is communicated with the first flue and the second flue；First flue has been sequentially communicated third dust-extraction unit, the second air-introduced machine, burning system
System, the second heat-exchanger rig, desulfurization and denitrification reaction device, the 4th dust-extraction unit and chimney；Second flue has been sequentially communicated
One dust-extraction unit, the first air-introduced machine, dry coke quenching reacting furnace, the first heat-exchanger rig, the second dust-extraction unit and flue gas separation unit.
Sintering machine is divided into I section, II section and III section along trolley traffic direction by the utility model；Described I section is sintering board
The 1/12~2/12 of vehicle overall length, II section is the 4/12~6/12 of sintering pallet overall length, and III section is the 5/ of sintering pallet overall length
12~7/12；First flue (2) is connected to I section and III section of bellows, and the second flue (3) is connected to II section of bellows.
Combustion system described in the utility model uses hot-blast stove, pulverized coal firing boiler or gas-fired boiler.
Flue gas separation unit described in the utility model is pressure-variable adsorption separator.
The beneficial effects of adopting the technical scheme are that the utility model can be by flue gas according to O2、H2O、NOx、
COx、SO2And the concentration difference of dioxin is collected in the first flue and the second flue respectively, is then distinguished according to the property of flue gas
It is handled, is realized to SO in sintering flue gas2、NOx, CO, the multiple pollutants such as dioxin comprehensive treatment；And it can be to flue gas
Thermal energy and COxIt is recycled.The utility model can cut down the improvement scale and investment of flue gas end desulphurization denitration；Realize flue gas
The comprehensive treatment of multiple pollutant；Realize effective recycling, the CO of the flue gas energyxEtc. resources high added value recycle；With controlling
Manage the features such as at low cost, effect is good, high-efficient.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is the system construction drawing of the utility model.
In figure: continuous pallettype sintering machine 1, the first flue 2, the second flue 3, the first dust-extraction unit 4-1, the second dust-extraction unit 4-2,
Third dust-extraction unit 4-3, the 4th dust-extraction unit 4-4, the first air-introduced machine 5-1, the second air-introduced machine 5-2, dry coke quenching reacting furnace 6；The
One heat-exchanger rig 7-1, the second heat-exchanger rig 7-2, flue gas separation unit 8；Combustion system 9；Desulfurization and denitrification reaction device 10；Chimney
11。
Specific embodiment
The comprehensive treatment of this sintering flue gas with using system include continuous pallettype sintering machine 1, the trolley along continuous pallettype sintering machine 1 is transported
Line direction is equipped with several bellows.To end from the starting point of continuous pallettype sintering machine 1, continuous pallettype sintering machine 1 is divided into three sections,
Respectively I section, II section and III section；The overall length of sintering pallet is divided into 12 parts, described I section for pallet overall length 1/12~
2/12, II section is the 4/12~6/12 of pallet overall length, and III section is the 5/12~7/12 of pallet overall length.In this way, I section of receipts
Collection is high O2, low H2O, low NOx, low COx, low SO2With the flue gas of low dioxin；II section collection be low O2, high H2O, high NOx、
High COx, low SO2With the flue gas of low dioxin；III section collection be high O2, low H2O, low NOx, low COx, high SO2With high dioxin
Flue gas.Described I section is connected to the first flue 2 with III section of bellows, and II section of bellows are connected to the second flue 3, can be realized in this way
It is separated according to the sintering flue gas of component difference, and then implements to handle respectively.First flue 2 has been sequentially communicated third dedusting dress
Set 4-3, the second air-introduced machine 5-2, combustion system 9, the second heat-exchanger rig 7-2, desulfurization and denitrification reaction device 10, the 4th dust-extraction unit 4-
4 and chimney 11.Second flue 3 has been sequentially communicated the first dust-extraction unit 4-1, the first air-introduced machine 5-1, parallel dry coke quenching
Reacting furnace 6, the first heat-exchanger rig 7-1, the second dust-extraction unit 4-2 and flue gas separation unit 8.The combustion system 9 is using heat
Wind furnace, pulverized coal firing boiler or gas-fired boiler；The flue gas separation unit 8 is based on the separation of pressure-variable adsorption partition method, mentions
The pressure-variable adsorption separator of pure CO；The dry coke quenching reacting furnace 6 is parallel dry coke quenching reacting furnace.
The roadmap of this system are as follows: be sent to after first converging the flue gas of I section of sintering machine, III section of bellows hot-blast stove it
The burning furnace heat-accumulating process that coal gas is participated in the combustion reactor of class is realized the pyrolytic of dioxin in this process and is left
Flue gas SO when hot-blast stove2Enrichment, then exchange heat cooling after carry out desulphurization denitration processing；At the same time, by the flue gas of II section of bellows
It is sent to the high temperature composed in parallel by two dry coke quenching reactor tanks and goes back original system by force and realize partial fume NOxRemoving, SO2Also
Original separation, O2With CO2Consumption, the enrichment of CO and the multipurposes such as activation of coke, then pass through subsequent heat exchange and lock out operation
Flue gas is divided into the product of three kinds of high added values: elemental sulfur, high-purity CO gas, remaining rich N2Gas.
The comprehensive treatment of this sintering flue gas and the treatment process for utilizing system are as follows:
(1) I section and III section of bellows collect high O2, low H2O, low NOx, low COx, higher SO2And higher dioxin concentration
Flue gas, import the first flue 2；II section of bellows collect low O2, high H2O, high NOx, high COx, low SO2And low dioxin concentration
Flue gas, import the second flue 3.
The flue gas of (2) first flues 2 enters combustion system after third dust-extraction unit 4-3 dedusting, through the second air-introduced machine 5-2
9 participate in the burning of combustion gas as combustion-supporting gas, realize flue gas SO after the pyrolytic of dioxin, burning2Enrichment；After burning
Flue gas is cooled to 120~160 DEG C through the second heat-exchanger rig 7-2 heat exchange, completes SO subsequently into desulfurization and denitrification reaction device 102、NOx
Removing, enter back into after the 4th dust-extraction unit 4-4 dedusting and atmosphere be discharged by chimney 11.
The flue gas of (3) second flues 3 enters parallel dry after the first dust-extraction unit 4-1 dedusting through the first air-introduced machine 5-1
Quenching reacting furnace 6 realizes NO under strongly reducing atmosphere in the dry coke quenching reactor tank that temperature is 1000~1200 DEG CxReduction it is de-
It removes, SO2Reduced separating, O2With CO2Consumption, the enrichment of CO and the activation of coke；When leaving parallel dry coke quenching reacting furnace
When rear flue-gas temperature≤150 DEG C, the flue gas of the second flue is switched to another dry coke quenching of parallel dry coke quenching reacting furnace
In reactor tank；100~120 DEG C are cooled to through the first heat-exchanger rig 7-1 heat exchange through treated the flue gas of dry coke quenching reacting furnace 6, so
Enter flue gas separation unit 8 after entering the second dust-extraction unit 4-2 dedusting afterwards, using variable-pressure adsorption separating method separation and concentration flue gas
In CO and elemental sulfur；It is separated into the product of three kinds of high added values: elemental sulfur, high-purity CO gas, remaining rich N2Gas, wherein
CO volume content is greater than 95% in high-purity CO gas, rich N2The N that the composition (volume fraction) of gas is 93~95%2, 3~5% H2、
0~0.50% O2, 0~0.12% CO, 0~0.4% CO2；The high-purity CO gas isolated can be used as material gas progress
High value added utilization is used as exotic fuels, remaining rich N2Gas can direct emission or progress deep exploitation.
Use case 1: the comprehensive treatment of this sintering flue gas and the concrete processing procedure of the system of utilization are as described below.
(1) it is directed to a 360m221 bellows of sintering machine, by I section of 1~3 bellows flue gas and III section of 12~21 wind
Case flue gas is pooled to the first flue 2, and ingredient is shown in Table 1；II section of 4~11 bellows flue gases are pooled to the second flue 3, ingredient is shown in Table
1。
Table 1: the temperature and ingredient of each flue gas before administering
(2) flue gas of the first flue 2 is participated in after third dust-extraction unit 4-3 as combustion-supporting gas to the combustion of hot-blast stove combustion gas
Burning process realizes pyrolytic, the SO of dioxin2Enrichment, using heat-exchange device 7-2 heat exchange be cooled to 135~155 DEG C
Enter desulfurization and denitrification reaction device 10 afterwards and completes SO2、NOxRemoving, enter back into after the 4th dust-extraction unit 4-4 dedusting by 11 row of chimney
Enter atmosphere, the smoke components in chimney 11 are as shown in table 2.
Table 2: the temperature and ingredient of flue gas are discharged in chimney 11
(3) flue gas of the second flue 3 is entered to parallel dry coke quenching reacting furnace 6 after the first dust-extraction unit 4-1,
Reduction removing NO in 1065 DEG C of dry coke quenching reactor tankx, Reduced separating SO2, consume O2With CO2, be enriched with CO and activate coke；
After flue gas enters the second dust-extraction unit 4-2 dedusting after heat-exchange device 7-1 heat exchange is cooled to 100~115 DEG C later, enter back into
Flue gas separation unit 8 using the CO and elemental sulfur in pressure-variable adsorption partition method separation and concentration flue gas, while obtaining remaining rich N2
Gas；Its CO volume content of the CO gas isolated is greater than 98.8%, the Chemical Manufacture for acetic acid；Remaining richness N2The group of gas
At (volume fraction) are as follows: 95.4% N2, 4.11% H2, 0.13% O2, 0.08% CO, 0.32% CO2, N can be replaced2As
Expendable medium inside steel mill.
Use case 2: the comprehensive treatment of this sintering flue gas and the concrete processing procedure of the system of utilization are as described below.
(1) it is directed to a 435m224 bellows of sintering machine, by I section of 1~4 bellows flue gas and III section of 13~24 wind
Case flue gas is pooled to the first flue 2, and ingredient is shown in Table 3；II section of 5~12 bellows flue gases are pooled to the second flue 3, ingredient is shown in Table
3。
Table 3: the temperature and ingredient of each flue gas before administering
(2) flue gas of the first flue 2 is participated in after third dust-extraction unit 4-3 as combustion-supporting gas to the burning of gas boiler
Process realizes pyrolytic, the SO of dioxin2Enrichment, using heat-exchange device 7-2 heat exchange be cooled to 120~145 DEG C after
SO is completed into desulfurization and denitrification reaction device 102、NOxRemoving, be discharged into after entering back into the 4th dust-extraction unit 4-4 dedusting by chimney 11
Atmosphere, the smoke components in chimney 11 are as shown in table 4.
Table 4: the temperature and ingredient of flue gas are discharged in chimney 11
(3) flue gas of the second flue 3 is entered to parallel dry coke quenching reacting furnace 6 after the first dust-extraction unit 4-1,
Reduction removing NO in 1030 DEG C of dry coke quenching reactor tankx, Reduced separating SO2, consume O2With CO2, be enriched with CO and activate coke；
After flue gas enters the second dust-extraction unit 4-2 dedusting after heat-exchange device 7-1 heat exchange is cooled to 110~120 DEG C later, enter back into
Flue gas separation unit 8 isolates CO and elemental sulfur in flue gas using pressure-variable adsorption partition method, while obtaining remaining rich N2Gas
Body；Its CO volume content of the CO gas isolated is greater than 95.6%, is used for steel mill's relative production process as exotic fuels；It is residual
Remaining richness N2The composition (volume fraction) of gas are as follows: 94.5% N2, 4.55% H2, 0.20% O2, 0.07% CO, 0.35%
CO2, can further purify the N in gas2、H2And carry out high value added utilization.
Claims (4)
1. a kind of comprehensive treatment of sintering flue gas and the system of utilizing, it is characterised in that: the bellows segmentation on pallet is communicated with
First flue (2) and the second flue (3)；First flue (2) has been sequentially communicated third dust-extraction unit (4-3), the second air inducing
Machine (5-2), combustion system (9), the second heat-exchanger rig (7-2), desulfurization and denitrification reaction device (10), the 4th dust-extraction unit (4-4) with
And chimney (11)；Second flue (3) has been sequentially communicated the first dust-extraction unit (4-1), the first air-introduced machine (5-1), dry coke quenching
Reacting furnace (6), the first heat-exchanger rig (7-1), the second dust-extraction unit (4-2) and flue gas separation unit (8).
2. a kind of comprehensive treatment of sintering flue gas according to claim 1 and the system of utilizing, it is characterised in that: sintering machine edge
Trolley traffic direction is divided into I section, II section and III section；Described I section is the 1/12~2/12 of pallet overall length, and II section is sintering platform
The 4/12~6/12 of vehicle overall length, III section is the 5/12~7/12 of pallet overall length；First flue (2) is connected to I section and III
The bellows of section, the second flue (3) are connected to II section of bellows.
3. a kind of comprehensive treatment of sintering flue gas according to claim 1 and the system of utilizing, it is characterised in that: the burning
System (9) uses hot-blast stove, pulverized coal firing boiler or gas-fired boiler.
4. a kind of comprehensive treatment of sintering flue gas according to claim 1,2 or 3 and the system of utilizing, it is characterised in that: institute
Stating flue gas separation unit (8) is pressure-variable adsorption separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821986444.7U CN209541450U (en) | 2018-11-29 | 2018-11-29 | A kind of comprehensive treatment of sintering flue gas and the system of utilizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821986444.7U CN209541450U (en) | 2018-11-29 | 2018-11-29 | A kind of comprehensive treatment of sintering flue gas and the system of utilizing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209541450U true CN209541450U (en) | 2019-10-25 |
Family
ID=68262664
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| CN113828133A (en) * | 2021-08-27 | 2021-12-24 | 上海交通大学 | Iron ore sintering flue gas multi-pollutant coprocessing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113828133A (en) * | 2021-08-27 | 2021-12-24 | 上海交通大学 | Iron ore sintering flue gas multi-pollutant coprocessing device |
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