CN202492534U - Flexible sealing device for converter mouth and gas hood - Google Patents
Flexible sealing device for converter mouth and gas hood Download PDFInfo
- Publication number
- CN202492534U CN202492534U CN2012201343081U CN201220134308U CN202492534U CN 202492534 U CN202492534 U CN 202492534U CN 2012201343081 U CN2012201343081 U CN 2012201343081U CN 201220134308 U CN201220134308 U CN 201220134308U CN 202492534 U CN202492534 U CN 202492534U
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- CN
- China
- Prior art keywords
- gas
- endless tube
- petticoat pipe
- flue gas
- nitrogen
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to a steelmaking process control device for steel works, in particular to a flexible sealing device for a Linz-Donawitz (LD) converter mouth and a gas hood. A bustle pipe is arranged around an inlet in the gas hood. Nitrogen inlet pipes are arranged on the bustle pipe. A plurality of nitrogen nozzles are annularly distributed at intervals on the bustle pipe. In each converter production period, a nitrogen sealing curtain is formed between flue gas on the inner side of the gas hood and air outside the gas hood to cut off contact between the flue gas and wild wind. According to the device, the contact between the flue gas and the air is cut off, so that the secondary combustion of a system is completely eradicated, potential explosion hazards of the dedusting system are completely eradicated, the calorific value of gas is improved, the amount of flue gas during the dedusting of a rear part is decreased, the purity and yield of the gas are improved, water and electricity are saved, and the problem about sealing between the converter mouth and the gas hood is radically and systematically solved; and the device can be safely and reliably used.
Description
Technical field
The utility model relates to a kind of steelworks process for making gear, is 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 significant meaning.Yet because the LD converter mouth often is in the roaring flame baking about 1500 ℃, dust with spatter bad working environment such as slag ablation, cause LD converter steelmaking fire door sealing problem, be that puzzlement LD converter is smelted the hard nut to crack that strides forward to the cleaning civilization always.Because of oxygen rifle under the work condition state frequently passes in and out, it is more frequent that the shape material that looses adds operations such as reaching stove, thus adopt the standard equipment sealing difficulty bigger, 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 generally goes up and down to regulate at 0～500mm, so that adapt to the processing requirement that stove is smelted each phase (slagformation period, carbon flame phase, catch carbon phase).But fall the cover sealing come what may, in actually operating, all will reserve the slit of 150～200mm, be convenient to operational observations carbon flame, very difficult realization sealing truly.For the sealing of petticoat pipe and fire door is more rationalized, should reduce the excessive pollution of flue gas to surrounding environment, reduce wild wind again and suck to improve coal gas purity; Reduce flue-gas temperature and reduce exhaust gas volumn; Current technology is elementary errors to be set at the petticoat pipe edge press the detection transmitter, and 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, serious to the ablation of instrument, this technology is difficult to embody at the practical application effect of converter.
The utility model content
The purpose of the utility model is to above-mentioned deficiency a kind of sealing problem that fundamentally systematically solves fire door and petticoat pipe to be provided; The present invention is on the basis of said system; Press nitrogen 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 in the employing.
The concrete solution of the utility model 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, on the endless tube at interval, a plurality of nitrogen nozzles have been periphery.
Endless tube is a pipe, is uniformly distributed along the circumference on it, upright 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 inboard flue gas of petticoat pipe and petticoat pipe outside air, form the nitrogen-sealed curtain one, isolated flue gas contacts with wild wind.
The utility model has the advantages that: 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 into airborne O in a large number
2Burn away in the process of flowing in the vaporization water-cooled flue with CO in the flue gas, combustion ratio is generally 0.1 (promptly 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 removed easily, can significantly improve back step efficiency of dust collection, under identical dust collecting process condition, realizes lower emission concentration.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 of the nitrogen volumetric expansion of ejection will be absorbed heat, and opposite with flue gas flow direction; Can effectively cool off the flue gas at 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, so can not generate the increase that newborn gas causes the flue gas total amount; Secondary combustion reduces 10%; The flue-gas temperature of vaporize water cold smoke road outlet 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 about 25%; Alleviate the dust separating pressure in rear portion, 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 turnaround.6, water-saving and electricity-saving.Exhaust gas volumn reduce the increase with macrobead flue dust ratio, dust-removal system is significantly economized on water, fan operation significantly economizes on electricity.
To combine accompanying drawing that the embodiment of the utility model is described in further detail below.
Description of drawings
Accompanying drawing is the structure diagram of the utility model.
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, the 2 upper edge circle spacings of endless tube, be uniformly distributed with, upright 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; Get into endless tube 2 through inlet pipe 4 and all press the back between the fire door upper end 6 of petticoat pipe 1 lower end 5 and body of heater 9, to 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.Promptly when laying endless tube 2, on the counter-fire face of pressing close to endless tube 2 on the watercooled hood 1, by the water-cooling cover 10 that the water-cooled endless tube at two to three intervals is formed, nitrogen nozzle 3 sprays gas from the slit of the water-cooled endless tube of water-cooling cover 10.
Claims (4)
1. converter mouth and petticoat pipe soft sealer, it is characterized in that petticoat pipe (1) upper inlet place along around endless tube (2) is installed, nitrogen inlet pipe (4) is arranged on the endless tube (2), endless tube (2) is gone up at interval, a plurality of nitrogen nozzles (3) have been periphery.
2. according to described converter mouth of claim 1 and petticoat pipe soft sealer, it is characterized in that endless tube (2) is a pipe, be uniformly distributed along the circumference on it, upright be provided with spraying nozzle (3) before 6～8 arcs.
3. according to claim 1 or 2 described converter mouths and petticoat pipe soft sealer, it is characterized in that there is water-cooling cover (10) nozzle (3) front portion.
4. according to described converter mouth of claim 3 and petticoat pipe soft sealer, it is characterized in that water-cooling cover (10) is to press close on the watercooled hood (1) on the counter-fire face of endless tube (2), be made up of the water-cooled endless tube at two to three intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201343081U CN202492534U (en) | 2012-04-01 | 2012-04-01 | Flexible sealing device for converter mouth and gas hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201343081U CN202492534U (en) | 2012-04-01 | 2012-04-01 | Flexible sealing device for converter mouth and gas hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202492534U true CN202492534U (en) | 2012-10-17 |
Family
ID=46998770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201343081U Expired - Fee Related CN202492534U (en) | 2012-04-01 | 2012-04-01 | Flexible sealing device for converter mouth and gas hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202492534U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899444A (en) * | 2012-10-26 | 2013-01-30 | 通化市五一环保科技股份有限公司 | System and method for treating converter flue gas |
| CN106929627A (en) * | 2017-04-10 | 2017-07-07 | 首钢总公司 | A kind of top and bottom combined blown converter |
-
2012
- 2012-04-01 CN CN2012201343081U patent/CN202492534U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899444A (en) * | 2012-10-26 | 2013-01-30 | 通化市五一环保科技股份有限公司 | System and method for treating converter flue gas |
| CN106929627A (en) * | 2017-04-10 | 2017-07-07 | 首钢总公司 | A kind of top and bottom combined blown converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING WUYI ENVIRONMENTAL PROTECTION TECHNOLOGY C Free format text: FORMER OWNER: TONGHUA WUYI ENVIRONMENTAL PROT TECHNOLOGY CO., LTD. Effective date: 20130130 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 134003 TONGHUA, JILIN PROVINCE TO: 100083 HAIDIAN, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130130 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. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121017 Termination date: 20130401 |