CN101144111A - Technique and combined system for removing dust from steelmaking convertor smoke by dry method and reusing waste heat - Google Patents
Technique and combined system for removing dust from steelmaking convertor smoke by dry method and reusing waste heat Download PDFInfo
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- CN101144111A CN101144111A CNA2007100660124A CN200710066012A CN101144111A CN 101144111 A CN101144111 A CN 101144111A CN A2007100660124 A CNA2007100660124 A CN A2007100660124A CN 200710066012 A CN200710066012 A CN 200710066012A CN 101144111 A CN101144111 A CN 101144111A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The present invention relates to the field of a steel-making converter fume dry method for dust removing. The present invention comprises dust extracting of the high temperature fume generated by a steel-making converter, heat exchanging, temperature decreasing and steam recovering. The present invention is characterized in that in the duration of blast of the steel-making converter, the high temperature fume with 800-1000 degrees and 80-150 g/Nm<SUP>3</SUP> (standard temperature and pressure) dust content coming from a vaporizing and cooling flue passes through a cyclone dust extractor and an exhaust heat boiler, then the fume temperature is decreased to 100-150 degrees, the dust content is decreased to 10-15 g/Nm<SUP>3</SUP> (standard temperature and pressure), and after the dust extracting by a bag-type dust extractor, the dust content of the fume is decreased below 10 mg/Nm<SUP>3</SUP> (standard temperature and pressure). The present invention has the advantages that the physical property of the fume and the physical space of the equipment are effectively used to simultaneously prevent the ash collection and the blocking of the exhaust heat boiler, and save the equipment area, thereby being an effective method for reducing the steel-making energy consumption.
Description
Technical field
The present invention relates to removing dust from steelmaking convertor smoke by dry method field.
Background technology
Steel-making converter when producing, the process for making that it is specific, making it produce high-temperature flue gas is intermittence, and dustiness is bigger, converter is when blowing, the flue gas of generation belongs to poisonous, flammable explosive gas based on CO.So in the world wide one-level venturi tube and secondary venturi tube spray cooling dedusting (the ton steel produces about 4 tons in sewage), serious environment pollution are adopted in the dedusting of converter gas mostly at present; Recent years, the application of a small amount of LT dry dedusting technology of domestic appearance is promptly by carrying out water-spraying evaporation cooling dedusting (not having wastewater disposition substantially) to high-temperature flue gas.Because the temperature that converter evaporation cooling air flue comes out cools by water spray at the converter gas below 800～1000 ℃, residual heat resources waste.In addition, owing to the major ingredient in the high-temperature flue gas is carbon monoxide, carbonic acid gas, reaches part nitrogen and oxygen and a large amount of dust etc., in process of production, handle bad as easy as rolling off a log generation gas explosion.
Summary of the invention:
The objective of the invention is to design a kind of: utilize existing sophisticated high temperature fume dust removal system, and be equipped with the equipments layout scheme of efficient waste heat boiler, optimization, form brand-new, the safe dry dedusting technology of a cover,
Technical scheme of the present invention is: a kind of removing dust from steelmaking convertor smoke by dry method: it comprises the high-temperature flue gas that steel-making converter is produced, carry out thick dedusting, heat exchange cooling recovery waste heat, smart dedusting, it is characterized in that, in the steel-making converter blowing process, the high-temperature flue gas below 800～1000 ℃ that converter evaporation cooling air flue is come out passes through the thick dedusting of tornado dust collector, behind the waste heat boiler depositing dust, flue-gas temperature is reduced to 100～150 ℃, simultaneously, high temperature grit more than the 10 μ m is all removed (possibility that reduces gas explosion) in prime cooling dust removal process, dustiness is reduced to 10 ~ 15g/Nm
3(mark condition) after the sack cleaner dedusting, is reduced to 10mg/Nm with dust content again
3Below (mark condition), satisfy the user and directly use.
Described converter smelting smoke and waste steam boiler depositing dust is meant, utilizes of the deadweight of the vertical space of flue, waste heat boiler and flue are used as the part of settling pocket in conjunction with dust in the flue gas.
Described thick process of cleaning is that converter gas carries out cyclone dust removal after the gasification cooling flue heat exchange is cooled to 800～1000 ℃.
Described smart process of cleaning is that converter gas carries out bag-type dust after residual heat boiler for exchanging heat is cooled to 100～150 ℃.
The combined system of a kind of removing dust from steelmaking convertor smoke by dry and UTILIZATION OF VESIDUAL HEAT IN, the flue that it is come by evaporation cooling flue of steel converter, high-temperature cyclone dust extractor, two stage superheater, interchanger, primary superheater, drum, economizer, collect ash bucket, sack cleaner, the exhanst gas outlet pipeline is formed, it is characterized in that the flue of evaporation cooling flue of steel converter connects the upper entrance of high-temperature cyclone dust extractor, high-temperature cyclone dust extractor is arranged in the bottom of system, vertical connection two stage superheater on high-temperature cyclone dust extractor, vertical connection heat exchange vaporizer on two stage superheater, downward by the bend pipe change duct orientation of flue again, and then connect primary superheater vertically downward, the vertical economizer that connects below primary superheater, below economizer, connect the grey ash bucket of a collection, the flue of drawing on the top of ash bucket connects horizontally disposed sack cleaner again, wherein, tornado dust collector, two stage superheater, heat exchange vaporizer centering is arranged; Primary superheater, economizer and collect ash bucket centering and arrange that vertical missing surpasses 50% of interface caliber.
Described by the reasonable Arrangement waste heat boiler, when utilizing waste heat boiler as heat exchange, the flue dust in the flue gas utilizes its vertical flue gas rising space as settling pocket.
By the application of native system, in flue gas ash removal and waste heat recovery,, make the usage ratio of equipment maximization by the existing equipment of rational deployment, eliminate the condition of gas explosion as much as possible, improve efficiency of dust collection and heat exchange efficiency, save occupation area of equipment.
Its high-temperature flue gas recovery characteristics are: the high temperature cyclone system is selected wear-resisting high-temperature components for use, under 1000 ℃ of flue gas operating modes, can steady in a long-term move.The dust that fly-ash separator is collected all is a dry dust, delivers to powder-storage bin by handling equipment and concentrates storage, regularly outward transport.This and wet method are removed the sludge treatment of getting off and compared, and be more energy-conservation, more environmental protection; This equipment layout is flexible, can be according to the place flexible arrangement, and floor space is little; Because dry method dust efficient height, reliable, make the whole stove of converter after environment improve greatly.
Advantage of the present invention is effectively to utilize the rational deployment of waste heat boiler, saves occupation area of equipment, makes full use of the equipment prior function, improves flue gas ash removal and complementary energy organic efficiency greatly, reduces the steel-making energy consumption.
Description of drawings
Fig. 1 is technical process of the present invention and device synoptic diagram.
Among the figure: 1 is the flue of evaporation cooling flue of steel converter, and 2 is high-temperature cyclone dust extractor, and 3 is two stage superheater, and 4 is interchanger, 5 is primary superheater, and 6 is drum, and 7 is economizer, 8 are the collection ash bucket, and 9 is sack cleaner, and 10 is the exhanst gas outlet pipeline.
Specific embodiment
Below by embodiment the present invention is described further, but is not limited to embodiment.
With elder brother's steel No. 6 removing dust from steelmaking convertor smoke by dry of three steel-making and complementary energy retrieving arrangement is example.
The converter technical parameter:
1, converter nominal volume: 50t
2, average smelting cycle: 33min
3, oxygen blow duration: 14～17min
4, maximum furnace gas amount: 35600m
3/ h (mark condition)
5, furnace gas export enters the temperature of petticoat pipe: the blowing process: 1400 ℃～1650 ℃
6, initial dust concentration: 80～150g/Nm
3(mark condition)
7, flue dust dispersity:
| Footpath grain/um | <0.5 | 0.5-1 | 1-2 | 2-10 | 10-40 | >40 |
| Combustion method/% | 50 | 45 | 5 | |||
| Do not fire method/% | 30 | 53 | 17 |
8, flue dust main component: Fe0 Fe203 MFe Ca0 SiO2 other
67.2％ 16.2％ 0.6％ 9.0％ 3.6％ 3.4％
9, gasification cooling flue: smoke inlet temperature: 1400～1650 ℃, temperature out: 800 ℃～1000 ℃
10, high-temperature cyclone dust extractor: remove the above particle of 10 μ, efficiency of dust collection is: more than 90%,
11, waste heat boiler (primary superheater, interchanger, two stage superheater, economizer, drum)
800 ℃～1000 ℃ of smoke inlet temperature, temperature out＜150 ℃.
12, sack cleaner: efficiency of dust collection is: 99.9%, and outlet dust content＜10mg/Nm
3(mark condition)
The average-volume composition of the furnace gas when 17, bessemerizing:
18, main technique equipment configuration:
1), PV type high temperature high efficiency cyclonic dust collector, model specification: PV2 * (DN2800 * 16000 * 18mm) (nonstandard).
2), waste heat boiler (interchanger+drum+primary superheater+two stage superheater+economizer+drum), model specification: GTQ25/3.6-I-1 (nonstandard);
3), sack cleaner, model specification: LCM-D-1350.
The formation of this device: the flue gas that evaporation cooling flue of steel converter comes out enters high-temperature cyclone dust extractor, high-temperature cyclone dust extractor is loaded on the bottom of waste heat boiler, waste heat boiler equipment is arranged vertically above tornado dust collector successively by flue, sack cleaner connects heat boiler outlet flue and horizontally disposed with tornado dust collector, and flue gas directly uses for the user by after the sack cleaner dedusting.
Claims (6)
1. the technology of removing dust from steelmaking convertor smoke by dry and UTILIZATION OF VESIDUAL HEAT IN, it comprises the high-temperature flue gas that steel-making converter is produced, carry out thick dedusting, heat exchange cooling recovery waste heat, smart dedusting, it is characterized in that, in the steel-making converter blowing process, the high-temperature flue gas below 800～1000 ℃ that converter evaporation cooling air flue is come out passes through the thick dedusting of tornado dust collector, behind the waste heat boiler depositing dust, flue-gas temperature is reduced to 100～150 ℃, simultaneously, the high temperature grit more than the 10 μ m is all removed (possibility that reduces gas explosion) in prime cooling dust removal process, dustiness is reduced to 10 ~ 15g/Nm
3(mark condition) after the sack cleaner dedusting, is reduced to 10mg/Nm with dust content again
3Below (mark condition).
2. the technology of a kind of removing dust from steelmaking convertor smoke by dry according to claim 1 and UTILIZATION OF VESIDUAL HEAT IN, it is characterized in that described converter smelting smoke and waste steam boiler depositing dust being meant, utilize of the deadweight of the vertical space of flue, waste heat boiler and flue are used as the part of settling pocket in conjunction with dust in the flue gas.
3. the technology of a kind of removing dust from steelmaking convertor smoke by dry according to claim 1 and UTILIZATION OF VESIDUAL HEAT IN is characterized in that described thick process of cleaning is that converter gas carries out cyclone dust removal after the gasification cooling flue heat exchange is cooled to 800～1000 ℃.
4. the technology of a kind of removing dust from steelmaking convertor smoke by dry according to claim 1 and UTILIZATION OF VESIDUAL HEAT IN is characterized in that described smart process of cleaning is that converter gas carries out bag-type dust after residual heat boiler for exchanging heat is cooled to 100～150 ℃.
5. the combined system of removing dust from steelmaking convertor smoke by dry and UTILIZATION OF VESIDUAL HEAT IN, the flue that it is come by evaporation cooling flue of steel converter, high-temperature cyclone dust extractor, two stage superheater, interchanger, primary superheater, drum, economizer, collect ash bucket, sack cleaner, the exhanst gas outlet pipeline is formed, it is characterized in that the flue of evaporation cooling flue of steel converter connects the upper entrance of high-temperature cyclone dust extractor, high-temperature cyclone dust extractor is arranged in the bottom of system, vertical connection two stage superheater on high-temperature cyclone dust extractor, vertical connection heat exchange vaporizer on two stage superheater, downward by the bend pipe change duct orientation of flue again, and then connect primary superheater vertically downward, the vertical economizer that connects below primary superheater, below economizer, connect the grey ash bucket of a collection, the flue of drawing on the top of ash bucket connects horizontally disposed sack cleaner again, wherein, tornado dust collector, two stage superheater, heat exchange vaporizer centering is arranged; Primary superheater, economizer and collect ash bucket centering and arrange that vertical missing surpasses 50% of interface caliber.
6. the combined system of a kind of dry dust removal equipment according to claim 5 and waste heat boiler, it is characterized in that by the reasonable Arrangement waste heat boiler, when utilizing waste heat boiler as heat exchange, the flue dust in the flue gas utilizes its vertical flue gas rising space as settling pocket.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100660124A CN101144111A (en) | 2007-07-02 | 2007-07-02 | Technique and combined system for removing dust from steelmaking convertor smoke by dry method and reusing waste heat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100660124A CN101144111A (en) | 2007-07-02 | 2007-07-02 | Technique and combined system for removing dust from steelmaking convertor smoke by dry method and reusing waste heat |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009143700A1 (en) * | 2008-05-27 | 2009-12-03 | 综合能源有限公司 | Waste heat boiler for coal gasification of fluidized bed |
| CN101532069B (en) * | 2009-04-14 | 2011-03-16 | 江苏中金环保科技有限公司 | Device for recycling flue gas of steelmaking converters through full-dry purification and process thereof |
| CN102094104A (en) * | 2010-12-16 | 2011-06-15 | 包头市磁力节能环保设备有限公司 | Process for removing dust from steelmaking converter flue gas by pure dry method and recovering heat energy synchronously, and waste heat boiler |
| CN102344987A (en) * | 2011-10-31 | 2012-02-08 | 中冶南方工程技术有限公司 | Primary flue gas dry dedusting process for vanadium recovering converter |
| CN101550362B (en) * | 2009-04-16 | 2012-07-18 | 中国海洋石油总公司 | Gasification dry dedusting technology |
| AT511430B1 (en) * | 2011-07-21 | 2012-12-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR DISCHARGING AND COOLING CONVERTERGAS |
| CN103374641A (en) * | 2012-04-20 | 2013-10-30 | 佛山市三叶环保设备工程有限公司 | Converter gas cloth-bag dust-removing purification method based on energy recycling |
| CN103697486A (en) * | 2012-09-27 | 2014-04-02 | 贵阳铝镁设计研究院有限公司 | Gas waste heat recycling device of gas generator |
| CN105716054A (en) * | 2016-02-29 | 2016-06-29 | 北京热盾节能技术有限公司 | Novel anti-explosion and explosion-proof upright-flue heat pipe waste heat boiler |
| CN107164599A (en) * | 2017-06-23 | 2017-09-15 | 中冶赛迪技术研究中心有限公司 | A kind of high-temperature combustible gas body residual neat recovering system and method |
| CN107190120A (en) * | 2017-07-19 | 2017-09-22 | 沈志军 | The technique and system of steel scrap are heated using converter gas |
| CN107447072A (en) * | 2017-09-29 | 2017-12-08 | 四川德胜集团钒钛有限公司 | A kind of steelmaking converter flue gas dust collecting system |
| CN114162790A (en) * | 2020-08-20 | 2022-03-11 | 中石化南京化工研究院有限公司 | Dust-removing heat-exchanging device, dust-removing heat-exchanging method of dust-containing high-temperature flue gas and method for preparing sulfuric acid from sulfur-containing waste |
| CN115491460A (en) * | 2022-10-17 | 2022-12-20 | 江苏中碳节能技术有限公司 | Converter flue gas treatment system and treatment method |
-
2007
- 2007-07-02 CN CNA2007100660124A patent/CN101144111A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009143700A1 (en) * | 2008-05-27 | 2009-12-03 | 综合能源有限公司 | Waste heat boiler for coal gasification of fluidized bed |
| CN101532069B (en) * | 2009-04-14 | 2011-03-16 | 江苏中金环保科技有限公司 | Device for recycling flue gas of steelmaking converters through full-dry purification and process thereof |
| CN101550362B (en) * | 2009-04-16 | 2012-07-18 | 中国海洋石油总公司 | Gasification dry dedusting technology |
| CN102094104B (en) * | 2010-12-16 | 2013-06-19 | 包头市磁力节能环保设备有限公司 | Process for removing dust from steelmaking converter flue gas by pure dry method and recovering heat energy synchronously, and waste heat boiler |
| CN102094104A (en) * | 2010-12-16 | 2011-06-15 | 包头市磁力节能环保设备有限公司 | Process for removing dust from steelmaking converter flue gas by pure dry method and recovering heat energy synchronously, and waste heat boiler |
| AT511430B1 (en) * | 2011-07-21 | 2012-12-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR DISCHARGING AND COOLING CONVERTERGAS |
| AT511430A4 (en) * | 2011-07-21 | 2012-12-15 | Siemens Vai Metals Tech Gmbh | METHOD AND DEVICE FOR DISCHARGING AND COOLING CONVERTERGAS |
| CN102344987B (en) * | 2011-10-31 | 2013-09-18 | 中冶南方工程技术有限公司 | Primary flue gas dry dedusting process for vanadium recovering converter |
| CN102344987A (en) * | 2011-10-31 | 2012-02-08 | 中冶南方工程技术有限公司 | Primary flue gas dry dedusting process for vanadium recovering converter |
| CN103374641A (en) * | 2012-04-20 | 2013-10-30 | 佛山市三叶环保设备工程有限公司 | Converter gas cloth-bag dust-removing purification method based on energy recycling |
| CN103697486A (en) * | 2012-09-27 | 2014-04-02 | 贵阳铝镁设计研究院有限公司 | Gas waste heat recycling device of gas generator |
| CN105716054A (en) * | 2016-02-29 | 2016-06-29 | 北京热盾节能技术有限公司 | Novel anti-explosion and explosion-proof upright-flue heat pipe waste heat boiler |
| CN107164599A (en) * | 2017-06-23 | 2017-09-15 | 中冶赛迪技术研究中心有限公司 | A kind of high-temperature combustible gas body residual neat recovering system and method |
| CN107190120A (en) * | 2017-07-19 | 2017-09-22 | 沈志军 | The technique and system of steel scrap are heated using converter gas |
| CN107447072A (en) * | 2017-09-29 | 2017-12-08 | 四川德胜集团钒钛有限公司 | A kind of steelmaking converter flue gas dust collecting system |
| CN114162790A (en) * | 2020-08-20 | 2022-03-11 | 中石化南京化工研究院有限公司 | Dust-removing heat-exchanging device, dust-removing heat-exchanging method of dust-containing high-temperature flue gas and method for preparing sulfuric acid from sulfur-containing waste |
| CN115491460A (en) * | 2022-10-17 | 2022-12-20 | 江苏中碳节能技术有限公司 | Converter flue gas treatment system and treatment method |
| CN115491460B (en) * | 2022-10-17 | 2024-06-07 | 江苏华和能科技术有限公司 | Converter flue gas treatment system and treatment method |
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