CN102605136B - Soft sealing device for converter mouth and fume hood - Google Patents
Soft sealing device for converter mouth and fume hood Download PDFInfo
- Publication number
- CN102605136B CN102605136B CN 201210093881 CN201210093881A CN102605136B CN 102605136 B CN102605136 B CN 102605136B CN 201210093881 CN201210093881 CN 201210093881 CN 201210093881 A CN201210093881 A CN 201210093881A CN 102605136 B CN102605136 B CN 102605136B
- Authority
- CN
- China
- Prior art keywords
- endless tube
- nitrogen
- water
- fume
- converter
- Prior art date
- 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 - Fee Related
Links
- 238000007789 sealing Methods 0.000 title abstract description 14
- 239000003517 fume Substances 0.000 title abstract 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 16
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 20
- 239000003546 flue gas Substances 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 3
- 238000009628 steelmaking Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000003034 coal gas Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002679 ablation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to a steelmaking process control device for a steel making factory, in particular to a soft sealing device for an LD (linz-donawitz) converter mouth and fume hood. The periphery of the inlet of the fume hood is provided with a ring pipe; the ring pipe is provided with a nitrogen inlet pipe; and a plurality of nitrogen spraying nozzles are annularly distributed on the ring pipe at intervals. During each period of production of a converter, a nitrogen sealing curtain is formed between the inside fume and the outside air of the fume hood, and the fume is separated from the outside air without contacting. Because the fume is separated from the outside air without contacting, the secondary combustion of a system is avoided, the hidden danger of explosion of a dedusting system is avoided, the calorific value of gas is improved, the rear dedusting fume is reduced, the purity and the yield of gas are improved, and water and electricity are saved. The soft sealing device for the LD converter mouth and fume hood can be used safely and reliably, and radically solves the problem on the sealing of the converter mouth and fume hood.
Description
Technical field
The present invention relates to a kind of steelworks process for making control device, be specifically related to a kind of LD converter mouth and petticoat pipe soft sealer.
Background technology
The sealing of LD converter mouth and petticoat pipe, for reducing smoke pollution, raising coal-gas recovering quality and quantity etc. all has very great meaning.Yet because the LD converter mouth often is in the roaring flame baking about 1500 ℃, the Working environment that dust is abominable with spattering slag ablation etc. causes LD converter steelmaking fire door sealing problem, is that puzzlement LD converter is smelted the hard nut to crack that strides forward to the cleaning civilization always.Because oxygen rifle under the work condition state frequently passes in and out, it is more frequent that loose shape material adds operations such as reaching stove, thus adopt the standard equipment sealing difficulty larger, and hinder production operation.For many years, the movable water-cooling petticoat pipe that generally adopts in the industry can play simple control action kou, and the stroke of watercooled hood is smelted each phase (slagformation period generally in 0～500mm lift adjustment so that adapt to stove, carbon flame phase, catch carbon phase) processing requirement.But fall come what may the cover sealing, all will reserve the slit of 150～200mm in actually operating, convenient operation is observed carbon flame, very difficult realization sealing truly.For the sealing of petticoat pipe and fire door is more rationalized, should reduce the excessive pollution to surrounding environment of flue gas, reduce again wild wind and suck to improve coal gas purity, reduce flue-gas temperature and reduce exhaust gas volumn, current technology is differential pressure to be set at the petticoat pipe edge detect transmitter, feedback signal and two civilian aditus laryngis top body elevating functions are chain, spacing and inside and outside differential pressure balance between regulation and control fire door and the petticoat pipe, but because detection signal converts actual act to and has retardance, add that the high temperature that fire door often is in about 1500 ℃ scorches, ablation to instrument is serious, and this technology is difficult to embody at the practical application effect of converter.
Summary of the invention
The objective of the invention is provides a kind of sealing problem that fundamentally systematically solves fire door and petticoat pipe for above-mentioned deficiency, the present invention is on the basis of said system, adopt medium pressure nitrogen gas petticoat pipe and fire door to be carried out the wind curtain type soft seal, the converter mouth of good sealing effect and petticoat pipe soft sealer.
Concrete solution of the present invention is: converter mouth and petticoat pipe soft sealer be petticoat pipe upper inlet place along around endless tube is installed, the nitrogen inlet pipe is arranged on the endless tube, interval on the endless tube, a plurality of nitrogen nozzles have been periphery.
Endless tube is pipe, is uniformly distributed along the circumference on it, vertical is provided with spraying nozzle before 6～8 (changing according to the converter mouth diameter) arcs.Water-cooling cover 10 is arranged on the endless tube.In each period that converter is produced, between the inboard flue gas of petticoat pipe and petticoat pipe outside air, form the nitrogen-sealed curtain one, isolated flue gas contacts with wild wind.
Advantage of the present invention is: 1, converter gas sucks the process of gasification cooling flue from petticoat pipe, and negative pressure can make the wild wind (being room air) around petticoat pipe and the fire door be inhaled in a large number airborne O
2Burn away in the process that flows in the vaporization water-cooled flue with CO in the flue gas, combustion ratio is generally 0.1 (namely 10%), can be considered the partial combustion state, and the soot dust granule≤1um of generation accounts for 40%; The isolated flue gas of this law contacts with air, stops the secondary system burning.Soot dust granule＞10um reaches 70%, and big dust particle is easily removed, and can significantly improve rear step efficiency of dust collection, realizes lower emission concentration under identical dust collecting process condition.2, after new device is used, suck only the falling property gas N of flue with flue gas
2Gas can completely cut off wild wind and suck, and stops the explosion hazard that dust-removal system is hiding, and guarantees the person and device security.3, when fire door and petticoat pipe generation malleation, because the nitrogen volumetric expansion of ejection will be absorbed heat, and opposite with flue gas flow direction, flue gas that can the effective cooling edge, the flue gas retraction volume is diminished, add that nitrogen has the spraying pressure of 0.5Mpa, can produce good sealing effectiveness.4, reduce smoke combustion coefficient 10%, mean that coal-gas recovering will increase CO content 8～10% in the coal gas in the phase.Generation and what come is the raising of caloric power of gas.5, exhaust gas volumn and flue-gas temperature.N
2Do not have any chemical reaction with flue gas after the suction of gas, therefore can not generate the increase that newborn gas causes amount of flue gas emission; Secondary combustion reduces 10%; The flue-gas temperature of the cold flue outlet of vaporize water drops to about 900～1000 ℃ from 1000～1100 ℃, and the method exhaust gas volumn of combustion is generally 70Nm
3/ t, and the combustion method exhaust gas volumn generally is about 5 times of the method for not firing, this programme with do not add nitrogen envelope curtain and compare, to make rear portion dedusting exhaust gas volumn reduce approximately 25%, alleviate the pressure of rear portion dedusting, coal gas purity also can increase, this point to domestic extending capacity reformation after dust-removal system ability steel mill less than normal very meaningful, reduce the blower fan workload, prolong the blower fan off-line maintenance cycle.6, water-saving and electricity-saving.Exhaust gas volumn reduce increase with macrobead flue dust ratio, dust-removal system is significantly economized on water, fan operation significantly economizes on electricity.
Below in conjunction with accompanying drawing embodiments of the present invention are described in further detail.
Description of drawings
Accompanying drawing is structure diagram of the present invention.
Embodiment
Referring to accompanying drawing, converter mouth and petticoat pipe soft sealer are equipped with circular endless tube 2 around the edge, watercooled hood 1 upper inlet place of flue gas water-cooled flue 8 lower ends, nitrogen inlet pipe 4 (metallic hose) is arranged on the endless tube 2, on the endless tube 2 along the circle spacing, uniformly, vertical be provided with spray nitrogen nozzle 3 before 6～8 arcs.In each period that converter is produced, between petticoat pipe 1 inboard flue gas and petticoat pipe 1 outside air, enter endless tube 2 by inlet pipe 4 and all press between the fire door upper end 6 of backward petticoat pipe 1 lower end 5 and body of heater 9 and spray nitrogen, form nitrogen-sealed curtain 7 one, isolated flue gas contacts with wild wind.In order to protect endless tube 2 and nozzle 3, be provided with water-cooling cover 10 in endless tube 2 front portions.Namely when laying endless tube 2, press close at watercooled hood 1 on the counter-fire face of endless tube 2, by the water-cooling cover 10 that the water-cooled endless tube at two to three intervals forms, nitrogen nozzle 3 sprays gas from the slit of the water-cooled endless tube of water-cooling cover 10.
Claims (1)
1. a converter mouth and petticoat pipe soft sealer, it is characterized in that: the ingress of the watercooled hood (1) of flue gas water-cooled flue (8) lower end along around circular endless tube (2) is installed, nitrogen inlet pipe (4) is arranged on the endless tube (2), endless tube (2) upper along the circle spacing, uniformly, vertical be provided with spray nitrogen nozzle (3) before 6～8 arcs; Be provided with water-cooling cover (10) in endless tube (2) front portion, water-cooling cover (10) is when laying endless tube (2), press close at watercooled hood (1) on the counter-fire face of endless tube (2), water-cooled endless tube by two to three intervals forms, nitrogen nozzle (3) sprays gas from the slit of the water-cooled endless tube of water-cooling cover (10), when converter is produced, between the inboard flue gas of watercooled hood (1) and watercooled hood (1) outside air, entering endless tube (2) by nitrogen inlet pipe (4) all presses between the fire door upper end (6) of the lower end (5) of backward watercooled hood (1) and body of heater (9) and sprays nitrogen, form one nitrogen-sealed curtain (7), isolated flue gas contacts with wild wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210093881 CN102605136B (en) | 2012-04-01 | 2012-04-01 | Soft sealing device for converter mouth and fume hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210093881 CN102605136B (en) | 2012-04-01 | 2012-04-01 | Soft sealing device for converter mouth and fume hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102605136A CN102605136A (en) | 2012-07-25 |
| CN102605136B true CN102605136B (en) | 2013-04-03 |
Family
ID=46522897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210093881 Expired - Fee Related CN102605136B (en) | 2012-04-01 | 2012-04-01 | Soft sealing device for converter mouth and fume hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102605136B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104357612B (en) * | 2014-11-13 | 2016-09-14 | 江苏永钢集团有限公司 | Air-casing is utilized to prevent the fire door flue of slagging scorification |
| CN104990088A (en) * | 2015-06-18 | 2015-10-21 | 惠州东江威立雅环境服务有限公司 | Security monitoring and emergency processing system and method for burning material pit |
| CN106929627A (en) * | 2017-04-10 | 2017-07-07 | 首钢总公司 | A kind of top and bottom combined blown converter |
| CN109609723B (en) * | 2018-12-26 | 2024-03-19 | 苏州海陆重工股份有限公司 | Sealing structure of movable smoke hood |
| CN112410500B (en) * | 2020-11-18 | 2021-08-20 | 新疆昆玉钢铁有限公司 | Smoke and dust anti-overflow device, movable smoke cover and converter steelmaking equipment |
| CN114737009A (en) * | 2022-03-14 | 2022-07-12 | 河钢股份有限公司 | Method for controlling nitrogen content in converter gas |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2910956Y (en) * | 2006-06-12 | 2007-06-13 | 江阴海陆冶金设备制造有限公司 | Coiled-pipe air-seal type active chimney of evaporated cooling flue of steelmaking converter |
| CN101205566B (en) * | 2007-12-05 | 2010-10-13 | 中冶京诚工程技术有限公司 | Movable hood mechanical seal for converter vapourization cooling system |
| CN201136878Y (en) * | 2007-12-10 | 2008-10-22 | 中冶京诚工程技术有限公司 | Mechanical sealing device for active fume hood of converter evaporated cooling system |
| CN201406446Y (en) * | 2009-05-25 | 2010-02-17 | 中冶赛迪工程技术股份有限公司 | Movable gas hood for converter gas |
-
2012
- 2012-04-01 CN CN 201210093881 patent/CN102605136B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102605136A (en) | 2012-07-25 |
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Owner name: BEIJING WUYI ENVIRONMENTAL PROTECTION TECHNOLOGY C Free format text: FORMER OWNER: TONGHUA WUYI ENVIRONMENTAL PROT TECHNOLOGY CO., LTD. Effective date: 20130426 |
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Free format text: CORRECT: ADDRESS; FROM: 134003 TONGHUA, JILIN PROVINCE TO: 100083 HAIDIAN, BEIJING |
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Effective date of registration: 20130426 Address after: 100083, No. 18, Zhongguancun East Road, Beijing, Haidian District, 1 A-1503 Patentee after: Tonghua Wuyi Environmental Protection Technology Co., Ltd. Address before: 134003 Tonghua City, Jilin province Erdaojiang Economic Development Zone Patentee before: Tonghua Wuyi Environmental Protection Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20210401 |