CN109668444A - A kind of sintering flue gas round-robin method and device - Google Patents
A kind of sintering flue gas round-robin method and device Download PDFInfo
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- CN109668444A CN109668444A CN201811598199.7A CN201811598199A CN109668444A CN 109668444 A CN109668444 A CN 109668444A CN 201811598199 A CN201811598199 A CN 201811598199A CN 109668444 A CN109668444 A CN 109668444A
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- China
- Prior art keywords
- sintering
- sintering machine
- flue
- flue gas
- circulation
- Prior art date
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- Pending
Links
- 238000005245 sintering Methods 0.000 title claims abstract description 129
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000003546 flue gas Substances 0.000 title claims abstract description 56
- 238000007616 round robin method Methods 0.000 title claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000001301 oxygen Substances 0.000 claims abstract description 37
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 37
- 238000007664 blowing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000000605 extraction Methods 0.000 claims description 7
- 238000007791 dehumidification Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 230000009467 reduction Effects 0.000 abstract description 8
- 239000002912 waste gas Substances 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 20
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 206010022000 influenza Diseases 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/002—Details of the installations, e.g. fume conduits or seals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention provides a kind of sintering flue gas round-robin method and devices.Waste gas circulation to the sintering machine tail portion that sintering machine head position accounts for sintering length 10-20% is used, waste gas circulation to the sintering machine head that sintering machine tail position accounts for sintering length 10-20% is used.Wherein the oxygen content of waste gas on head is low, and the oxygen content for increasing head and tail race way using oxygen enrichment technology guarantees the combustion position and sinter quality of sintering to 20-25% level.A kind of sintering flue gas round-robin method provided by the invention and device, it is therefore an objective to while realizing sintered, energy saving emission reduction, by oxygen enrichment technology, not influence the yield and quality of sinter.
Description
Technical field
The invention belongs to be sintered emission reduction field, in particular to a kind of sintering flue gas round-robin method and device.
Background technique
The pollutant discharge amount of sintering process is big in steel industry, and flue gas recirculation is the important side for reducing its total emission volumn
Formula.Both at home and abroad it has been suggested that and apply a variety of circulation technologies, such as LEEP, Epsint, EOS, selective flue gas recirculation technique and
Baosteel flue gas recirculation technique etc..Domestic some steel mill such as Ning Gang, Sha Gang, steel, moves steel etc. and has carried out industrial application respectively forever.So
And due to flue gas recirculation after, the problem of the temperature or oxygen content of cycle gas, cause the negative effect to sintering production, lead
Cause some factories and miness flue gas recirculation cases and unsuccessful.In China, sinter is as the most important burden structure feed of blast furnace, matter
Amount is significant to smooth operation of furnace, how to guarantee not influencing to be sintered mineral products matter while after putting into flue gas recirculation technique in emission reduction
Amount, is an important project.The invention proposes a kind of new flue gas recirculation method and apparatus, that is, solve to combine improvement
Sintering Operation Index and the double effects for realizing sinter emission reduction.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art described in background technique, it is simultaneous simultaneously to provide a kind of i.e. solution
The sintering flue gas round-robin method and device of Gu Gaishan Sintering Operation Index and the double effects of realization sinter emission reduction.
The technical scheme adopted by the invention is as follows: a kind of sintering flue gas circulator, including sintering machine, first circulation cigarette
Road, second circulation flue and flue collector；The air inlet and air outlet of the first circulation flue respectively with sintering machine head bellow
Air outlet connected with sintering machine tail portion circulating flue gas fan housing, the air inlet and air outlet of the second circulation flue respectively with burning
The air outlet of knot drive end unit bellows is connected with sintering machine head circulating flue gas fan housing, the outlet air end of the first circulation flue and the
The outlet air end of two cycle flues is separately connected oxygen channel, the air inlet of the flue collector and the air outlet of sintering machine middle part bellow
Connection.
In order to make full use of imflammable gas in sintering flue gas waste heat and flue gas, realizes and sintering machine head position is accounted for into sintering
The waste gas circulation of length 10-20% to sintering machine tail portion uses, and sintering machine tail position is accounted for the exhaust gas of sintering length 10-20%
It is recycled to the use of sintering machine head, is advanced optimized, sintering machine head bellow occupies the 10-20% of sintering total length, described
Sintering machine tail portion bellows occupy the 10-20% of sintering total length.
In order to improve the utilizing status of cycle sintering flue gas, while avoiding cycle sintering flue gas to the shadow of material sintering quality
It rings, guarantees the good sintering of material, advanced optimize, the first circulation flue is successively arranged dedusting along airflow direction and fills
It sets, dehumidification device and blower；The second circulation flue is successively arranged dust-extraction unit and blower along airflow direction；The main cigarette
Road is successively arranged electrical dust collector device, blower and desulfuring and denitrifying apparatus along airflow direction；It further include jet chimney, the steam pipe
Road is removably mounted at outside sintering machine, and the steam jet of jet chimney is connect with sintering machine, for the charge level into sintering machine
Blowing steam.
A kind of sintering flue gas round-robin method based on above-mentioned sintering flue gas circulator, the method includes by sintering machine
The flue gas on head leads to sintering machine tail portion via first circulation flue, and the flue gas of sintering machine tail portion is drawn via second circulation flue
Oxygen is blown into sintering machine head and sintering machine tail portion via oxygen channel to sintering machine head, while respectively, in the middle part of sintering machine
Flue gas pass through flue collector be discharged.
It advanced optimizes, controlling in the sintering machine circulating flue gas total amount is 15-35%, is recycled to head and tail
Oxygen content in flue gas is respectively 20-25%.The waste gas circulation that sintering machine head position accounts for sintering length 10-20% is extremely sintered
Drive end unit uses, and waste gas circulation to the sintering machine head that sintering machine tail position accounts for sintering length 10-20% is used.Wherein burn
The oxygen content of waste gas for tying chain-drive section is low, different with the oxygen content in tail flue gas for sintering machine head using oxygen enrichment technology, point
The oxygen content for not increasing head and tail race way quantitatively makes to reach 20-25% level, realizes the same of sintered, energy saving emission reduction
When, by oxygen enrichment technology, guarantee the combustion position and sinter quality of sintering.In addition, removing sintering machine head end and tail portion by petticoat pipe
The place of covering introduces detachable jet chimney, carries out charge level blowing steam, blowing steam duty to the bed of material of sintering machine tail portion
Gas concentration controls 1-5%.
A kind of sintering flue gas round-robin method provided by the invention and device, the advantage is that: 1, realize sintered pollutant
Sintering Operation Index is not influenced while emission reduction；2, change reuse after the front and rear exhaust gas mixing of current flue gas recirculation to
The drawback that sintering belt comes；The different demands of sintering machine head end and tail to amount of oxygen, specific aim supplemental oxygen, by a small amount of can be directed to
The problem of oxygen-enriched supplement cycle gas oxygen content deficiency.
As it can be seen that improving sinter quality and total amount of pollutant emission reduction due to can be achieved at the same time, which has biggish push away
Wide prospect.
Detailed description of the invention
Fig. 1 is conventional sintering flue gas aftertreatment technology schematic diagram.
Fig. 2 is the sintering flue gas circulator schematic diagram in the embodiment of the present invention.
In figure: 1. sintering machines, 2. first circulation flues, 3. second circulation flues, 4. flue collectors, 5. sintering machine tail portions circulation
Flue gas fan housing, 6. sintering machine head circulating flue gas fan housings, 7. oxygen channels.8. dust-extraction unit, 9. dehumidification devices, 10. blowers,
11. dust-extraction unit, 12. blowers, 13. electrical dust collector devices, 14. blowers, 15. desulfuring and denitrifying apparatus, 16. igniters, 17. chimneys.
Specific embodiment
The present invention is described in further detail below with reference to embodiment: dust-extraction unit in following embodiment, dehumidification device, blower and
Desulfuring and denitrifying apparatus is fexible unit in this field.
Embodiment 1:
(arrow in Fig. 1 and Fig. 2 represents oxygen or sintering flue gas flow direction) referring to fig. 2, a kind of sintering flue gas circulation
Device, including sintering machine 1, first circulation flue 2, second circulation flue 3 and flue collector 4.The air inlet of the first circulation flue 2
Mouth and air outlet are connect with the air outlet of sintering machine head bellow and sintering machine tail portion circulating flue gas fan housing 5 respectively, and described second
The air inlet and air outlet of cycle flue 3 respectively with the air outlet of sintering machine tail portion bellows and sintering machine head circulating flue gas fan housing
6 connections, the outlet air end of the first circulation flue 2 and the outlet air end of second circulation flue 3 are separately connected oxygen channel 7, described
The air inlet of flue collector 4 and the air outlet of sintering machine middle part bellow connect.First circulation flue 2 is successively arranged along airflow direction
Dust-extraction unit 8, dehumidification device 9 and blower 10.The second circulation flue 3 is successively arranged 11 He of dust-extraction unit along airflow direction
Blower 12.The flue collector 4 is successively arranged electrical dust collector device 13, blower 14 and desulfuring and denitrifying apparatus 15 along airflow direction.Also
Including jet chimney, the jet chimney is removably mounted at outside sintering machine, and the steam jet of jet chimney and sintering machine connect
It connects, for the charge level blowing steam into sintering machine.
Sintering machine head bellow occupies the 10% of sintering total length in the present embodiment, and sintering machine tail portion bellows occupy burning
Tie the 10% of total length.
The sintering flue gas round-robin method of sintering flue gas circulator based on the present embodiment are as follows: sintering machine head position accounts for burning
The exhaust gas of knot length 10% is recycled to sintering machine tail position after dedusting, dehumidifying；The oxygen content of exhaust gas is 14%, mixes and accounts for
The oxygen that concentration according to exhausted air quantity 11% is 95%, is adjusted to 22% for the oxygen content of exhaust gas.Sintering machine tail position accounts for sintering
The exhaust gas of length 10% is recycled to sintering machine head position after dedusting；The oxygen content of exhaust gas is 19%, mixes and occupies exhausted air quantity
The oxygen that 4.2% concentration is 95%, is adjusted to 22% for the oxygen content of exhaust gas.Blowing steam in the middle part of sintering machine, blowing steam
Duty gas concentration control 3%.
Embodiment 2:
See Fig. 2, the present embodiment and the sintering flue gas circulator implemented in 1 are essentially identical, and unique difference is: sintering machine head end
Portion's bellows occupy the 15% of sintering total length, and sintering machine tail portion bellows occupy the 15% of sintering total length.Based on this implementation
The sintering flue gas round-robin method of the sintering flue gas circulator of example are as follows: sintering machine head position accounts for the exhaust gas of sintering length 15%,
After dedusting, dehumidifying, it is recycled to sintering machine tail position；The oxygen content of exhaust gas is 13%, mixes and occupies exhausted air quantity 10.8%
The oxygen that concentration is 95%, is adjusted to 21% for the oxygen content of exhaust gas.Sintering machine tail position accounts for the exhaust gas of sintering length 15%,
After dedusting, it is recycled to sintering machine head position；The oxygen content of exhaust gas is 18%, mixes and occupies the concentration of exhausted air quantity 4.1% and be
The oxygen content of exhaust gas is adjusted to 21% by 95% oxygen.Blowing steam in the middle part of sintering machine, the control of blowing steam duty gas concentration
2%.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (5)
1. a kind of sintering flue gas circulator, it is characterised in that: including sintering machine, first circulation flue, second circulation flue and
Flue collector；The air inlet and air outlet of the first circulation flue respectively with the air outlet of sintering machine head bellow and sintering machine tail
The connection of portion's circulating flue gas fan housing, the outlet air with sintering machine tail portion bellows respectively of the air inlet and air outlet of the second circulation flue
Mouth is connected with sintering machine head circulating flue gas fan housing, the outlet air end of the first circulation flue and the outlet air end of second circulation flue
It is separately connected oxygen channel, the air inlet of the flue collector and the air outlet of sintering machine middle part bellow connect.
2. sintering flue gas circulator according to claim 1, it is characterised in that: the sintering machine head bellow occupies burning
The 10-20% of total length is tied, sintering machine tail portion bellows occupy the 10-20% of sintering total length.
3. sintering flue gas circulator according to claim 1, it is characterised in that: the first circulation flue is along air-flow
Direction is successively arranged dust-extraction unit, dehumidification device and blower；The second circulation flue is successively arranged dedusting along airflow direction
Device and blower；The flue collector is successively arranged electrical dust collector device, blower and desulfuring and denitrifying apparatus along airflow direction；Further include
Jet chimney, the jet chimney are removably mounted at outside sintering machine, and the steam jet of jet chimney is connect with sintering machine, are used
In the charge level blowing steam into sintering machine.
4. a kind of sintering flue gas round-robin method based on sintering flue gas circulator as claimed any one in claims 1 to 3,
It is characterized by: will be burnt the method includes the flue gas on sintering machine head is led to sintering machine tail portion via first circulation flue
The flue gas of knot drive end unit leads to sintering machine head via second circulation flue, while respectively via oxygen channel to sintering machine head
It is blown into oxygen with sintering machine tail portion, the flue gas in the middle part of sintering machine is discharged by flue collector.
5. sintering flue gas round-robin method according to claim 4, it is characterised in that: control circulating flue gas in the sintering machine
Total amount is 15-35%；The oxygen content being recycled in the flue gas of head and tail is 20-25%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598199.7A CN109668444A (en) | 2018-12-26 | 2018-12-26 | A kind of sintering flue gas round-robin method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598199.7A CN109668444A (en) | 2018-12-26 | 2018-12-26 | A kind of sintering flue gas round-robin method and device |
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| Publication Number | Publication Date |
|---|---|
| CN109668444A true CN109668444A (en) | 2019-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811598199.7A Pending CN109668444A (en) | 2018-12-26 | 2018-12-26 | A kind of sintering flue gas round-robin method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021139136A1 (en) * | 2020-01-09 | 2021-07-15 | 中南大学 | Emission-reduction-accompanied sintering method using energy-carrying composite gas medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0543951A (en) * | 1991-08-13 | 1993-02-23 | Nippon Steel Corp | Method for operating sintering machine |
| JP2000328149A (en) * | 1999-05-25 | 2000-11-28 | Kobe Steel Ltd | Exhaust gas circulation type sintering method |
| JP2001241863A (en) * | 2000-02-29 | 2001-09-07 | Kobe Steel Ltd | Exhaust gas circulating sintering operation method |
| JP2001280857A (en) * | 2000-03-29 | 2001-10-10 | Nkk Corp | Apparatus and method for reducing exhaust gas from sintering machine |
| CN201885575U (en) * | 2010-12-08 | 2011-06-29 | 江阴兴澄特种钢铁有限公司 | Sintering machine tail fume and tail air bellow fume self-recycling device |
| CN105135895A (en) * | 2015-08-03 | 2015-12-09 | 郑琨 | Selective sintering flue gas sectional type comprehensive treatment technology |
| CN108195199A (en) * | 2018-03-02 | 2018-06-22 | 唐山国丰钢铁有限公司 | It is sintered flue material treatment process and sealing device special |
-
2018
- 2018-12-26 CN CN201811598199.7A patent/CN109668444A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0543951A (en) * | 1991-08-13 | 1993-02-23 | Nippon Steel Corp | Method for operating sintering machine |
| JP2000328149A (en) * | 1999-05-25 | 2000-11-28 | Kobe Steel Ltd | Exhaust gas circulation type sintering method |
| JP2001241863A (en) * | 2000-02-29 | 2001-09-07 | Kobe Steel Ltd | Exhaust gas circulating sintering operation method |
| JP2001280857A (en) * | 2000-03-29 | 2001-10-10 | Nkk Corp | Apparatus and method for reducing exhaust gas from sintering machine |
| CN201885575U (en) * | 2010-12-08 | 2011-06-29 | 江阴兴澄特种钢铁有限公司 | Sintering machine tail fume and tail air bellow fume self-recycling device |
| CN105135895A (en) * | 2015-08-03 | 2015-12-09 | 郑琨 | Selective sintering flue gas sectional type comprehensive treatment technology |
| CN108195199A (en) * | 2018-03-02 | 2018-06-22 | 唐山国丰钢铁有限公司 | It is sintered flue material treatment process and sealing device special |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021139136A1 (en) * | 2020-01-09 | 2021-07-15 | 中南大学 | Emission-reduction-accompanied sintering method using energy-carrying composite gas medium |
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Application publication date: 20190423 |