EP0212296A2 - Vorrichtung zum pneumatischen Einspritzen von pulverförmigen Stoffen in einen unter Druck stehenden Behälter und die Anwendung zum Einspritzen von pulverförmiger Steinkohle in einen Schachtofen - Google Patents

Vorrichtung zum pneumatischen Einspritzen von pulverförmigen Stoffen in einen unter Druck stehenden Behälter und die Anwendung zum Einspritzen von pulverförmiger Steinkohle in einen Schachtofen Download PDF

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Publication number
EP0212296A2
EP0212296A2 EP86110057A EP86110057A EP0212296A2 EP 0212296 A2 EP0212296 A2 EP 0212296A2 EP 86110057 A EP86110057 A EP 86110057A EP 86110057 A EP86110057 A EP 86110057A EP 0212296 A2 EP0212296 A2 EP 0212296A2
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EP
European Patent Office
Prior art keywords
silo
distribution
silos
pressure
storage silo
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.)
Withdrawn
Application number
EP86110057A
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English (en)
French (fr)
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EP0212296A3 (de
Inventor
Léon Ulveling
Louis Schmit
Edouard Legille
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paul Wurth SA
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Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0212296A2 publication Critical patent/EP0212296A2/de
Publication of EP0212296A3 publication Critical patent/EP0212296A3/de
Withdrawn legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/001—Injecting additional fuel or reducing agents
    • C21B5/003—Injection of pulverulent coal

Definitions

  • the present invention relates to a device for the pneumatic injection of pulverulent materials into a pressure vessel, comprising a storage silo, a distribution silo, a series of dosers for extracting the pulverulent materials from the distribution silo, pneumatic transport lines connecting each of the metering units to said enclosure, as well as means for automatically transferring the pulverulent material from the storage silo which is under a substantially atmospheric pressure towards the distribution silo in which there prevails a pressure higher than that of said enclosure.
  • the invention will be described with reference to its most advantageous application, namely the injection of solid fuels into a shaft furnace.
  • a device of the kind described above is known from patent application EP-A-0 079 444.
  • the pulverulent material is transferred from the storage silo to the distribution silo through an intermediate silo which makes airlock function.
  • This intermediate silo is therefore connected alternately through a set of valves to the storage silo and the distribution silo, that is to say that it is alternately pressurized and ventilated. Since the extraction of the pulverulent material from the distribution silo is carried out, permanently, that is to say without interruption, it is necessary that the volume of the intermediate silo is relatively large in order to be able to transfer enough material into the silo of distribution so that there is no interruption during the filling of the intermediate silo.
  • the pipes and valves must be large enough to reduce transfer times from one silo to another.
  • these two silos are connected through sets of valves to an aeration pipe provided with a filter. All these conditions, necessities and precautionary measures however make this installation relatively complex, bulky and, consequently, relatively expensive.
  • the object of the present invention is to provide an improved device of the type described in the preamble, which is simpler and is particularly suitable for small volumes.
  • the device proposed by the present invention is essentially characterized by two intermediate silos each connected by automatic valves, upstream to the storage silo and, downstream, to the distribution silo and a pressurization circuit connecting a source inert gas under pressure through automatic valves at each of the intermediate silos.
  • the low volume of the intermediate silos allows them to be decompressed through the storage silo. This has the double advantage of not having to provide the intermediate silos with an aeration pipe and a filter, on the one hand, and that of a fluidization of the material in the storage silo at the time of ventilation of the intermediate silos, on the other hand, which allows a better flow of the storage silo.
  • the pressurization circuit includes a pressure gauge for monitoring the pressure in the distribution silo and a control valve to compensate, through the intermediate silos, for the pressure losses in the distribution silo caused by extracting pulverulent materials and opening the communication valves between the intermediate silos and the distribution silo.
  • the pressurization of the intermediate silos is carried out by placing in communication with the distribution silo, while the pressurization of the latter is carried out through the intermediate silos.
  • the fact that the intermediate silos are no longer pressurized before the opening of the communication valve with the distribution silo and that the pressure thereof is regulated through each of the intermediate silos has two advantages.
  • This pressure equalization between the two silos obviously leads to a pressure drop of the order of a few tenths of bars in the distribution silo.
  • an agitator is provided at the outlet of the storage silo to keep the material in motion and ensure better flow to the intermediate silos.
  • the powdered coal which is brought, for example, by tanker or railroad, is transferred to a high-capacity storage silo 10, for example of a capacity 100 m3.
  • the level in this storage silo 10 is monitored by a level probe 12 which signals the need for coal refueling.
  • the silo 10 is furthermore provided with aeration towards the atmosphere with a filter 14 as well as an explosion valve 16 to allow the absorption of accidental shock waves.
  • agitator 18 For continuously stirring the powdered coal in order to promote the flow out of the silo 10.
  • This agitator 18 opens the way to two parallel conduits 20A and 20B each provided with valves automatic closing 22.
  • Two intermediate silos 24A and 24B, with low capacity, for example 0.5 m3, are connected upstream to the two lines 20A and 20B and downstream through lines 26A and 26B each provided with automatic valves 28, a distribution silo 30.
  • Each of the intermediate silos 24A, 24B is associated with an upper level sensor 32 intended to automatically control the closing of the valves 22 when filling the intermediate silo, as well as a lower level sensor 34 intended to automatically control the closing of the corresponding valve 28 when emptying the intermediate silo to the distribution silo 30.
  • the distribution silo 30 comprises, at its base, a series of flow pipes 36 i , the number of which depends on the number of nozzles with which the vat furnace in which the powdered coal is injected.
  • Each of these nozzles 36 i opens into a metering device 38 i , for example of the cellular rotator type with variable speed motor to extract predetermined and adjustable quantities of powdered coal.
  • Each of these dosers 38 i is connected through a pressurized air line 40 i to a compressor 42 in order to propel the metered quantities of powdered coal through pipes 44 i to each of the nozzles of the shaft furnace.
  • the intermediate silos 24A and 24B must act as an airlock between these two silos.
  • a pressurization circuit supplied by a line 46 of inert gases under pressure such as, for example, nitrogen.
  • This pipe 46 includes a closing valve 48 and an automatic control valve 52 controlled by a pressure gauge 54 which measures the pressure inside the distribution silo 30. Downstream of the control valve 52, the pipe 46 splits into two branches 46A and 46B each provided with an automatic valve 50A and 50B and opening respectively in the upper part of the intermediate silos 24A and 24B.
  • the intermediate silos 24A and 24B communicate, moreover, through two ventilation pipes 56A, 56B with the storage silo 10 to allow the evacuation of air as the silos 24A, 24B are filled.
  • the upper level sensor 32 detects the filling of the silo 24A, this sensor automatically interrupts communication with the silo 10 by closing the corresponding valves 22. At the same time, the emptying of the silo 24B ends, which is detected by the level probe 34 or a higher level probe 58 associated with the distribution silo 30. Consequently, the valve 28 having allowed communication between the silo 24B and silo 30 is closed automatically.
  • the valve 28 is open to establish communication between the silo 24A and the distribution silo 30.
  • This opening causes the gases under pressure to rise in the silo 30 to silo 24A until pressure equalization between these two silos.
  • This pressure equalization is accompanied by agitation and fluidization of the powdered coal in the silo 24A.
  • the pressure gauge 54 controls the opening valves 52 and 50A for allow the injection of pressurized gas into silo 24A until compensation for the pressure drop in silo 30.
  • the intermediate silo 24B is put in communication with the storage silo 10 by the opening of the valves 22. As of the opening of these, the pressure in the silo 24B is absorbed in the much larger volume of the storage silo 10.
  • the ventilation of intermediate silos through silo 10 is of course made possible by the small volume of silos 24 compared to that of storage silo 10 and has the double advantage of creating fluidization in silo 10 and to make superfluous separate lines with ventilation filter for the intermediate silos 24.
  • the powdered coal can flow from the storage silo 10 through the line 20B in silo 24B, the excess air which can escape progressively through the ventilation duct 56B in silo 10. It should be noted that the automatic valves in the ventilation ducts 56A, 56B are only opened after decompression of the silos s 24 when the flow from silo 10 has started.
  • the filling of the silo 24B ends approximately at the same time as the emptying of the neighboring silo 24A, which is detected by the level probes 32 and 34. From then on, the cycle begins again by inverting the valves and filling the silo 24A and emptying silo 24B.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
  • Blast Furnaces (AREA)
EP86110057A 1985-08-21 1986-07-22 Vorrichtung zum pneumatischen Einspritzen von pulverförmigen Stoffen in einen unter Druck stehenden Behälter und die Anwendung zum Einspritzen von pulverförmiger Steinkohle in einen Schachtofen Withdrawn EP0212296A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU86048A LU86048A1 (fr) 1985-08-21 1985-08-21 Dispositif pour l'injection pneumatique de matieres pulverulentes dans une enceinte sous pression et application a l'injection de combustibles solides dans un four a cuve
LU86048 1985-08-21

Publications (2)

Publication Number Publication Date
EP0212296A2 true EP0212296A2 (de) 1987-03-04
EP0212296A3 EP0212296A3 (de) 1988-03-02

Family

ID=19730534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110057A Withdrawn EP0212296A3 (de) 1985-08-21 1986-07-22 Vorrichtung zum pneumatischen Einspritzen von pulverförmigen Stoffen in einen unter Druck stehenden Behälter und die Anwendung zum Einspritzen von pulverförmiger Steinkohle in einen Schachtofen

Country Status (8)

Country Link
US (1) US4702288A (de)
EP (1) EP0212296A3 (de)
JP (1) JPS6246814A (de)
AU (1) AU6166786A (de)
BR (1) BR8604034A (de)
ES (1) ES2000788A6 (de)
LU (1) LU86048A1 (de)
ZA (1) ZA865791B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363656A1 (de) * 1988-10-12 1990-04-18 Leybold Aktiengesellschaft Vorrichtung zum Nachfüllen von Pulver, insbesondere für eine in einer Vakuumkammer arbeitenden Beschichtungseinrichtung
EP0504581A2 (de) * 1991-03-20 1992-09-23 Paul Wurth S.A. Verfahren und Vorrichtung zur Behandlung von pulverförmiger Kohle in einer Einspritzanlage für feste Brennstoffe
WO2014006073A1 (fr) 2012-07-06 2014-01-09 Paul Wurth S.A. Installation de distribution de matiere pulverulente par transport pneumatique comportant un dispositif de depressurisation d'un reservoir sous pression de stockage de ladite matiere

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9409851D0 (en) * 1994-05-17 1994-07-06 Cambridge Consultants Improvements in and relating to containers of particulate material
AT402816B (de) * 1995-10-19 1997-09-25 Voest Alpine Ind Anlagen Verfahren zum fördern eines feinteiligen feststoffes
SG73602A1 (en) * 1999-01-12 2001-10-16 Sky Technology Pte Ltd Bulk conveying and distribution system, method for controlling the same and pneumatic conveying method
US6561980B1 (en) 2000-05-23 2003-05-13 Alpha Intervention Technology, Inc Automatic segmentation of prostate, rectum and urethra in ultrasound imaging
GB0512998D0 (en) * 2005-06-27 2005-08-03 Inbulk Technologies Ltd Pneumatic conveying velocity control device
CA2854797A1 (en) 2011-04-04 2012-10-11 Proven Technologies Llc Lc Accurate dry bulk handling system and method of use
LU92916B1 (en) * 2015-12-17 2017-07-13 Wurth Paul Sa Grinding and drying plant
CN108408414B (zh) * 2018-03-19 2020-04-28 中冶华天南京工程技术有限公司 新型粉体物料并罐均匀输送系统
CN112176143A (zh) * 2020-09-25 2021-01-05 中冶南方工程技术有限公司 一种用于高炉重力除尘卸灰的双中间灰仓卸灰系统及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB324392A (en) * 1928-10-25 1930-01-27 Polysius G A method of and apparatus for conveying materials in bulk by means of compressed air
DE544794C (de) * 1928-11-03 1932-02-22 Polysius Akt Ges G Verfahren zum Foerdern von pulverfoermigem Massengut durch Druckluft
DE862429C (de) * 1951-07-28 1953-01-12 Johannes Moeller Gefaessfoerderer mit einer Strahlpumpe zum pneumatischen Foerdern pulverfoermigen und koernigen Gutes
EP0027909A1 (de) * 1979-10-26 1981-05-06 Krupp Polysius Ag Anlage zur Förderung von feinkörnigem Gut
EP0079444A1 (de) * 1981-10-19 1983-05-25 Paul Wurth S.A. Vorrichtung zum Überwachen des Inhaltes und der Füllung eines Verteilerbehälters für pulverförmige Materialien

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2556162C2 (de) * 1975-12-13 1985-02-28 Krupp Koppers GmbH, 4300 Essen Vorrichtung und Verfahren zum Einschleusen feinkörniger bis staubförmiger Brennstoffe in eine unter erhöhtem Druck stehende Vergasungseinrichtung
DE3114338C2 (de) * 1981-04-09 1985-06-13 Carl Still Gmbh & Co Kg, 4350 Recklinghausen Verfahren und Vorrichtung zur volumetrischen Bestimmung einer Ofencharge
US4545410A (en) * 1984-01-30 1985-10-08 Cyclonaire Corporation System for transferring dry flowable material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB324392A (en) * 1928-10-25 1930-01-27 Polysius G A method of and apparatus for conveying materials in bulk by means of compressed air
DE544794C (de) * 1928-11-03 1932-02-22 Polysius Akt Ges G Verfahren zum Foerdern von pulverfoermigem Massengut durch Druckluft
DE862429C (de) * 1951-07-28 1953-01-12 Johannes Moeller Gefaessfoerderer mit einer Strahlpumpe zum pneumatischen Foerdern pulverfoermigen und koernigen Gutes
EP0027909A1 (de) * 1979-10-26 1981-05-06 Krupp Polysius Ag Anlage zur Förderung von feinkörnigem Gut
EP0079444A1 (de) * 1981-10-19 1983-05-25 Paul Wurth S.A. Vorrichtung zum Überwachen des Inhaltes und der Füllung eines Verteilerbehälters für pulverförmige Materialien

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0363656A1 (de) * 1988-10-12 1990-04-18 Leybold Aktiengesellschaft Vorrichtung zum Nachfüllen von Pulver, insbesondere für eine in einer Vakuumkammer arbeitenden Beschichtungseinrichtung
EP0504581A2 (de) * 1991-03-20 1992-09-23 Paul Wurth S.A. Verfahren und Vorrichtung zur Behandlung von pulverförmiger Kohle in einer Einspritzanlage für feste Brennstoffe
EP0504581A3 (en) * 1991-03-20 1993-01-27 Paul Wurth S.A. Process and device for the treatment of pulverulent coal in an installation for injecting solid fuels
WO2014006073A1 (fr) 2012-07-06 2014-01-09 Paul Wurth S.A. Installation de distribution de matiere pulverulente par transport pneumatique comportant un dispositif de depressurisation d'un reservoir sous pression de stockage de ladite matiere
CN104541119A (zh) * 2012-07-06 2015-04-22 保罗沃思公司 用于通过气动运输分配粉状物质且包括用于使储存所述物质的加压贮存器减压的设备的装置
CN104541119B (zh) * 2012-07-06 2016-01-20 保罗沃思公司 用于通过气动运输分配粉状物质且包括用于使储存所述物质的加压贮存器减压的设备的装置
US10823506B2 (en) 2012-07-06 2020-11-03 Paul Wurth S.A. Installation for distributing pulverulent substance by pneumatic transportation, comprising a device for depressurizing a pressurized reservoir in which said substance is stored

Also Published As

Publication number Publication date
ZA865791B (en) 1987-06-24
AU6166786A (en) 1987-02-26
ES2000788A6 (es) 1988-03-16
EP0212296A3 (de) 1988-03-02
LU86048A1 (fr) 1987-03-06
JPS6246814A (ja) 1987-02-28
BR8604034A (pt) 1987-06-30
US4702288A (en) 1987-10-27

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