WO2013014326A1 - Procédé d'échantillonnage et dispositif d'échantillonnage - Google Patents

Procédé d'échantillonnage et dispositif d'échantillonnage Download PDF

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Publication number
WO2013014326A1
WO2013014326A1 PCT/FI2011/050676 FI2011050676W WO2013014326A1 WO 2013014326 A1 WO2013014326 A1 WO 2013014326A1 FI 2011050676 W FI2011050676 W FI 2011050676W WO 2013014326 A1 WO2013014326 A1 WO 2013014326A1
Authority
WO
WIPO (PCT)
Prior art keywords
cooling fluid
gas
sampling device
dust particles
pipeline
Prior art date
Application number
PCT/FI2011/050676
Other languages
English (en)
Inventor
Jukka Laulumaa
Matti LUOMALA
Esa SIMOLA
Toivo TUOMINEN
Original Assignee
Outotec Oyj
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Outotec Oyj filed Critical Outotec Oyj
Priority to PCT/FI2011/050676 priority Critical patent/WO2013014326A1/fr
Publication of WO2013014326A1 publication Critical patent/WO2013014326A1/fr
Priority to FI20145135A priority patent/FI126919B/fi

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/24—Test rods or other checking devices
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4673—Measuring and sampling devices
    • 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
    • F27D19/00—Arrangements of controlling devices
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/04—Arrangements of indicators or alarms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2247—Sampling from a flowing stream of gas
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C2005/5288—Measuring or sampling devices
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0006—Monitoring the characteristics (composition, quantities, temperature, pressure) of at least one of the gases of the kiln atmosphere and using it as a controlling value
    • F27D2019/0012—Monitoring the composition of the atmosphere or of one of their components
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
    • G01N2001/2217—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption using a liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2226—Sampling from a closed space, e.g. food package, head space
    • G01N2001/2235—Sampling from a closed space, e.g. food package, head space over a melt, e.g. furnace
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N2001/2282—Devices for withdrawing samples in the gaseous state with cooling means
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present invention relates to a sampling method for sampling dust with a sampling device from internal atmosphere of a metal production furnace (e.g. Flash Smelting Furnace) , a furnace for melting metals or from exit gas ducts of said furnaces.
  • a metal production furnace e.g. Flash Smelting Furnace
  • the present in ⁇ vention also relates to a sampling device to sample dust from internal atmosphere of a metal production furnace (e.g. Flash Smelting Furnace), a furnace for melting metals or from exit gas ducts of said furnac ⁇ es .
  • US 5,759,482 discloses a water cooled tubular sampling device that is insertable in a duct of a furnace to extract flue gas from the duct.
  • the device comprises an outer tube comprising a closed lower end with a bottom 3 and a closed upper end having an outlet opening.
  • An inner tube is arranged coax- ially inside the outer tube so that an annular gap is defined between the outer tube and the inner tube. Cooling fluid is arranged to flow in the gap.
  • the in- ner tube comprises an outlet opening adjacent to its upper end for sucking gaseous substances out from the inner tube.
  • the inlet opening via which the furnace gas and dust enter the inner tube is formed of the open lower end of the inner tube.
  • the cooling of is indirect cooling because the transfer of the heat from the gas flowing inside the inner tube to the cooling fluid goes by conduction through the wall of the inner tube .
  • the problem is that the indirect cooling is not very efficient, because the materials to be sampled tend to continue their reactions inside the sampling device and outside the furnace. Therefore, the condition of the reactions in the furnace cannot be reliably deter ⁇ mined from the taken samples.
  • An object of the present invention is to alleviate the problems described above and to introduce a solution that allows a sudden stop of reactions in the sampled gas and dust particles.
  • a first aspect of the present invention is a sampling method for sampling gas and dust with a sampling device from internal atmosphere of a metal production furnace (e.g. Flash Smelting Furnace), a furnace for melting metals or from exit gas ducts of said furnac ⁇ es.
  • the method comprises sucking furnace gas and dust particles from the furnace atmosphere to the sampling device, cooling the sucked gas and dust particles with cooling fluid, and discharging gas and dust particles from the sampling device.
  • cooling is implemented by directly spraying pressurized cooling fluid, e.g.
  • the step of discharging the gas and dust particles is implemented by pumping out the slurry of cooling fluid and dust particles and sucking out the scrubbed gas and cooling fluid vapor.
  • a second aspect of the present invention is a sampling device to sample gas and dust from internal atmosphere of a furnace for producing metals, melting metals or from exit gas ducts of said furnaces.
  • the sampling de ⁇ vice comprises an outer tube comprising a closed first lower end having a bottom, and a closed first upper end having a first outlet opening.
  • the sampling device further comprises an inner tube arranged coaxial- ly inside the outer tube, so that an annular gap is defined between the outer tube and the inner tube.
  • the inner tube comprises a closed second upper end, a se ⁇ cond outlet opening adjacent to the second upper end for sucking gaseous substances out from the inner tube, a second lower end, and an inlet opening for in- troducing furnace gas and dust particles into the in ⁇ ner tube.
  • the second lower end of the inner tube is open and located at a distance from the bottom of the outer tube to provide flow path between the inner tube and the annular gap.
  • the sampling device further comprises a spray nozzle arranged inside the inner tube to spray pressurized cooling fluid above the inlet opening to quench the hot dust particles by direct contact of cooling fluid to the dust particles as said dust particles together with the furnace gas enter via the inlet opening to the inner tube and to scrub the gas from said dust particles as the gas is sucked upwards to the second outlet opening.
  • the slurry of cooling fluid and dust particles is collected on the bottom of the outer tube from which it can be discharged by pumping via the gap out from the first outlet opening. The slurry flowing in the gap cools the inner tube and the outer tube.
  • the advantage provided by the invention is that the reactions in the dust particles and gases can immedi ⁇ ately be stopped already in the sampling device at the moment they enter the sampling device by a sudden de ⁇ crease of temperature achieved by the direct cooling fluid spray. Furthermore, the invention allows sam- pling of such gases and dust which could react with each other. Because the reactions are stopped, in the analysis of the samples the furnace conditions can re- liably be observed.
  • the sampling method and the sam ⁇ pling device of the invention are applicable for sam ⁇ pling gas and dust from e.g. a flash smelting furnace, an Ausmelt furnace, a roasting furnace, a sin- tering furnace and an electric arc furnace, a furnace for melting metals and/or from exit gas ducts of said furnaces .
  • the sampling device comprises a sample receiver, a first pipeline connect ⁇ ed to the first outlet opening, and a first pump ar ⁇ ranged in the first pipeline for pumping the slurry of cooling fluid and dust particles to the sample receiv ⁇ er via a first exit branch of the first pipeline.
  • the first pipeline comprises a drain forming a second exit branch of the first pipeline.
  • the sampling device comprises a T- valve connected to the first pipeline or separate valves in each of the first and second exit branches of the first pipeline to guide the flow of slurry to the sample receiver and/or to the drain.
  • the sampling device comprises a second pipeline connected to the second outlet opening, and a blower arranged in the second pipeline for sucking out the cooling fluid vapor and gas .
  • the sampling device comprises a cooling fluid trap arranged before the blower in the second pipeline for extracting cooling fluid from the gas .
  • the sampling device comprises a third pipeline connected to the spray noz- zle, and a second pump to provide pressurized cooling fluid to the spray nozzle.
  • the sampling device comprises a cooling fluid tank from which the second pump is arranged to pump cooling fluid via the third pipeline .
  • the sampling device comprises a regulating valve arranged in the third pipeline to regulate cooling fluid flow to the spray nozzle .
  • Fig. 1 is a schematic section view of one embodiment of the sampling device of the invention.
  • Fig. 2 is a cross-section II-II from Fig. 1;
  • Fig. 3 illustrates a schematic pipework in connection with the sampling device of Fig. 1.
  • Figure 1 shows a sampling device configured to sample gas and dust from internal atmosphere of a furnace F (see Fig. 3) .
  • the sampling device includes an outer tube 1 compris ⁇ ing a closed first lower end 2 having a bottom 3.
  • the outer tube 1 further comprises a closed first upper end 4 having a first outlet opening 5.
  • An inner tube 6 is arranged coaxially inside the outer tube 1, so that an annular gap 7 (see also Fig. 2) is defined between the outer tube 1 and the inner tube 6. As seen in Fig. 2 the cross-section of the inner tube 6 and outer tube 1 is circular.
  • the inner tube comprises a closed second upper end 8 and a second outlet opening 9.
  • the second outlet opening 9 is adjacent to the se- cond upper end 8. Gaseous substances can be sucked out from the inner tube 6 via the second outlet opening 9.
  • the inner tube 6 also has a second lower end 10.
  • An inlet opening 11 is arranged to introduce furnace gas and dust particles into the inner tube 6.
  • the in ⁇ let opening 11 is located at a distance h from the bottom 3 of the outer tube 1.
  • the inlet opening 11 ex ⁇ tends through the gap 7 and the wall of the outer tube 1 so that the opening is sealed by a seal member 25 to prevent leakage of the slurry of cooling fluid and dust particles out from the gap 7 and also to prevent furnace gases from entering into the gap 7.
  • the second lower end 10 of the inner tube 6 is open and at a distance H from the bottom 3 of the outer tube 1 so that a flow path is provided between the in- ner tube 6 and the gap 7.
  • a spray nozzle 12 is arranged inside the inner tube 6 to spray pressurized cooling fluid above the inlet opening 11.
  • the spray nozzle 12 is configured to spray the cooling fluid so that the cooling fluid spray hits the inner wall surface of the inner tube 6 just above the inlet opening 11.
  • the furnace gas and dust parti ⁇ cles immediately come into contact with cooling fluid as they enter into the inner tube via the inlet open- ing 11.
  • the hot dust particles are quenched by said direct contact to the cooling fluid.
  • the gas is scrubbed from said particles by the cooling fluid spray as it is being suctioned upwards to the second outlet opening 9.
  • the slurry of cooling fluid and dust particles collect on the bottom 3 of the outer tube 1 from which it is pumped via the gap 7 to the first outlet opening 5.
  • the slurry flowing in the gap 7 towards the first outlet opening 5 cools the inner tube 6 and the outer tube 1.
  • the cooling fluid may be water or a suitable salt so ⁇ lution.
  • the salt solution may be more inert (dissolves less gas and dust) than water.
  • the sampling device comprises a first pipeline 14 connected to the first outlet open ⁇ ing 5 of the outer tube 1.
  • a first pump 15 is arranged in the first pipeline 14 for pumping the slurry of cooling fluid and dust particles to a sample receiver 13.
  • the first pipeline 14 also comprises a drain 16.
  • a T-valve 17 is connected to the first pipeline 14 to guide the flow of slurry to the sample receiver 13 and/or to the drain 16.
  • the T-valve can be replaced with separate valves 17 , 17 (shown with dot ⁇ ted lines) in each exit branch 26 and 16 of the first pipeline .
  • the sampling device comprises a second pipe ⁇ line 18 connected to the second outlet opening 9.
  • a blower 19 is arranged in the second pipeline 18 for sucking out the cooling fluid vapor and gas.
  • a cooling fluid trap 20 is arranged before the blower 19 in the second pipeline 18 for extracting cooling fluid from the gas .
  • the sampling device further comprises a third pipeline 21 connected to the spray nozzle 12.
  • a second pump 22 provides pressurized cooling fluid to the spray nozzle 12.
  • the third pipeline 21 may also be connected to a water distribution system (not shown) .
  • a cooling fluid tank 23 may be arranged from which the second pump 22 pumps cooling fluid via the third pipe- line 21.
  • a regulating valve 24 may be arranged in the third pipeline 21 to regulate cooling fluid flow to the spray nozzle 12.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention porte sur un procédé d'échantillonnage et un dispositif d'échantillonnage pour l'échantillonnage de poussière provenant d'un four pour la production de métaux ou la fusion de métaux ou provenant de conduits de sortie de gaz desdits fours. Un refroidissement est mis en œuvre par pulvérisation directe de fluides de refroidissement sous pression sur le gaz et les particules de poussière pour refroidir brusquement les particules de poussière par contact direct du fluide de refroidissement et des particules de poussière et pour laver le gaz sortant du four dans le dispositif d'échantillonnage immédiatement lorsque le gaz sortant du four et les particules de poussière entrent dans le dispositif d'échantillonnage. La suspension épaisse de fluide de refroidissement et de particules de poussière est pompée et le gaz lavé et la vapeur de fluide de refroidissement sont enlevés par aspiration, séparément. Une buse de pulvérisation (12) est disposée à l'intérieur du tube interne (6) pour pulvériser du fluide de refroidissement sous pression au-dessus d'une ouverture d'entrée (11) par laquelle le gaz sortant du four et les particules de poussière entrent dans le tube interne. La suspension épaisse de fluide de refroidissement et de particules de poussière est recueillie au fond (3) du tube externe (1) à partir duquel elle peut être évacuée par pompage vers une ouverture de sortie (5) en passant par l'espace (7), la suspension épaisse circulant dans l'espace (7) refroidissant le tube interne (6) et le tube externe (1).
PCT/FI2011/050676 2011-07-26 2011-07-26 Procédé d'échantillonnage et dispositif d'échantillonnage WO2013014326A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/FI2011/050676 WO2013014326A1 (fr) 2011-07-26 2011-07-26 Procédé d'échantillonnage et dispositif d'échantillonnage
FI20145135A FI126919B (fi) 2011-07-26 2014-02-12 Näytteenottomenetelmä ja näytteenottolaite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2011/050676 WO2013014326A1 (fr) 2011-07-26 2011-07-26 Procédé d'échantillonnage et dispositif d'échantillonnage

Publications (1)

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WO2013014326A1 true WO2013014326A1 (fr) 2013-01-31

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Application Number Title Priority Date Filing Date
PCT/FI2011/050676 WO2013014326A1 (fr) 2011-07-26 2011-07-26 Procédé d'échantillonnage et dispositif d'échantillonnage

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FI (1) FI126919B (fr)
WO (1) WO2013014326A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104888988A (zh) * 2015-06-03 2015-09-09 新气象（唐山）合同能源管理有限公司 采样探头新型喷嘴
CN106769263A (zh) * 2017-02-17 2017-05-31 徐斌 取样装置
CN108398297A (zh) * 2018-02-27 2018-08-14 周福明 一种空气检测用旋转式采集设备
CN109444343A (zh) * 2018-12-14 2019-03-08 上海颐柏科技股份有限公司 一种氮化热处理炉取气系统及方法
CN109781176A (zh) * 2018-12-27 2019-05-21 西安交通大学 危险介质闪蒸喷雾两相流与雾化发生装置及测试方法
CN112241018A (zh) * 2020-10-09 2021-01-19 中核核电运行管理有限公司 一种气体冷指取样装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3006194A (en) * 1958-03-03 1961-10-31 Beckman Instruments Inc Gas sample tube
US3107535A (en) * 1960-03-01 1963-10-22 Leeds & Northrup Co Gas sampling probe
US5759482A (en) * 1996-08-07 1998-06-02 Air Liquide America Corp. Water cooled flue gas sampling device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3006194A (en) * 1958-03-03 1961-10-31 Beckman Instruments Inc Gas sample tube
US3107535A (en) * 1960-03-01 1963-10-22 Leeds & Northrup Co Gas sampling probe
US5759482A (en) * 1996-08-07 1998-06-02 Air Liquide America Corp. Water cooled flue gas sampling device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104888988A (zh) * 2015-06-03 2015-09-09 新气象（唐山）合同能源管理有限公司 采样探头新型喷嘴
CN106769263A (zh) * 2017-02-17 2017-05-31 徐斌 取样装置
CN106769263B (zh) * 2017-02-17 2023-11-07 徐斌 取样装置
CN108398297A (zh) * 2018-02-27 2018-08-14 周福明 一种空气检测用旋转式采集设备
CN108398297B (zh) * 2018-02-27 2020-08-18 徐州市聚源环保科技有限公司 一种空气检测用旋转式采集设备
CN109444343A (zh) * 2018-12-14 2019-03-08 上海颐柏科技股份有限公司 一种氮化热处理炉取气系统及方法
CN109781176A (zh) * 2018-12-27 2019-05-21 西安交通大学 危险介质闪蒸喷雾两相流与雾化发生装置及测试方法
CN112241018A (zh) * 2020-10-09 2021-01-19 中核核电运行管理有限公司 一种气体冷指取样装置

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Publication number Publication date
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