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EP0021222B1 - Procédé et installation de dosage et de transport par voie pneumatique de matières solides vers une enceinte sous pression - Google Patents

Procédé et installation de dosage et de transport par voie pneumatique de matières solides vers une enceinte sous pression Download PDF

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Publication number
EP0021222B1
EP0021222B1 EP80103206A EP80103206A EP0021222B1 EP 0021222 B1 EP0021222 B1 EP 0021222B1 EP 80103206 A EP80103206 A EP 80103206A EP 80103206 A EP80103206 A EP 80103206A EP 0021222 B1 EP0021222 B1 EP 0021222B1
Authority
EP
European Patent Office
Prior art keywords
receptacle
dosing
pressure
feed tank
accordance
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
Application number
EP80103206A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0021222A1 (fr
Inventor
Leon Ulveling
Edouard Legille
Jean Boever
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
Original Assignee
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19729177&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0021222(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Paul Wurth SA filed Critical Paul Wurth SA
Priority to AT80103206T priority Critical patent/ATE3270T1/de
Publication of EP0021222A1 publication Critical patent/EP0021222A1/fr
Application granted granted Critical
Publication of EP0021222B1 publication Critical patent/EP0021222B1/fr
Expired legal-status Critical Current

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Classifications

    • 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 invention relates to a process for metering and transporting solid materials pneumatically between a storage tank being under substantially atmospheric pressure and a pressure vessel, as well as an installation for carrying out such a process.
  • the invention relates to the handling of pulverulent materials in the steel industry, such as, for example, lignite powder for injection into blast furnaces, or even powdered ore, or powdered coal for injection into a reactor of a direct reduction installation and will be described, by way of illustration, with reference to such steel applications.
  • Application DE-A 2 703 736 describes an installation and a method for metering and transporting solid materials by pneumatic route between a storage tank at atmospheric pressure and a pressurized enclosure, which consists of extracts the material from the reservoir, that it is introduced into a metering container at atmospheric pressure until the latter contains a predetermined quantity of material, the content of the container being continuously measured during filling, which is isolated then the dosing container storage tank, which is pressurized yesterday, that a communication is established between the dosing container and an intermediate container, that the contents of the dosing container are transferred to the intermediate container by gravity, isolate the dosing container from the intermediate container after this transfer, pressurize the intermediate container, ventilate the dosing container and start again the filling operation thereof, that the content of the intermediate container is transferred to a supply tank under the same pressure by gravity, and that the material is extracted from this supply tank to transfer it in the enclosure in a controlled manner.
  • the metering tank is therefore under pressure during weighing, which complicates the latter.
  • the dosing tank cannot be weighed separately since it is integral with the other downstream tanks.
  • the object of the present invention is to fill this gap and to provide a new process allowing controlled injection and metered against pressure in an enclosure, as well as an installation for the implementation of such a process.
  • the propulsion fluid is preferably air at a temperature below 80 ° C and circulating at a speed of about 20 meters / second.
  • the solid matter can be either lignite, iron ore or coal dust, in powder form.
  • the intermediate container and the supply tank are fitted with level sensors to measure the minimum and maximum filling.
  • the pulverulent material is stored in a storage tank 2 into which it is brought directly from a means of transport such as, for example, the railway.
  • a storage tank 2 into which it is brought directly from a means of transport such as, for example, the railway.
  • a means of transport such as, for example, the railway.
  • only one storage tank has been shown, but in general, two are provided, in order to be able to work continuously.
  • the pulverulent material is discharged through the bottom of the storage tank through a pipe 6 provided with an automatic valve 10.
  • a second pipe 4 provided with an automatic valve 8 is used for emptying the storage tank 2.
  • From the pipe 6 the pulverulent material is conveyed by means of a conveyor propeller 12 into a metering container 14 provided with two automatic valves 16 and 18 for the isolation upstream respectively downstream.
  • the dosing container 14 rests on several, for example three, pressure sensors intended to continuously measure the weight of the dosing container 14 and more particularly the weight of its contents.
  • This weight measuring device is used, as will be explained later, for the automatic control of the installation.
  • a supply line for pressurized air is indicated by the reference 20. Assuming that the overpressure in the enclosure into which the pulverulent material is to be injected is 2.5 bars, it is necessary to provide an overpressure of approximately 3 , 5 bars in line 20.
  • This supply line is divided into three branches, each comprising an automatic valve 22, 24, 26, a manual valve 28, 30, 32 and a non-return valve 34, 36 and 38.
  • the automatic valves 22, 24 and 26 are intended for automatic adjustment of the pressurized air flow as required, while the manual valves 28, 30 and 32 are used for an initial manual adjustment fixing the maximum flow in each of the pipes.
  • the metering container 14 is further provided with an automatic valve 40 for aeration of the container.
  • the pulverulent material is pneumatically conveyed through a line 42 using the pressurized air as propulsion fluid introduced by the valve 26.
  • the line 42 brings the pulverulent material into an intermediate container 44.
  • This container being alternately under pressure and at atmospheric pressure, also comprises two automatic valves 46 and 48 for the insulation downstream and upstream.
  • Downstream of this intermediate container 44 is a supply tank 50 also isolated upstream and downstream by automatic valves 52 respectively 54.
  • a filtering device 56 with which; is connected a self-regulating pressure valve 58 intended to maintain a uniform pressure in the tank 50, for example, an overpressure of 3 bars when the initial overpressure in the pipe 20 is 3.5 bars.
  • the reservoir 50 is also connected to a pressurized air line 62 intended to increase the pressure inside the reservoir 50 when the latter falls below the set pressure on which the self-regulating valve is calibrated. 58,
  • the reference 66 schematically indicates the transfer of the pulverulent material from the reservoir 50 to the pressure enclosure 64.
  • This enclosure 64 can be constituted by the reactor of a direct reduction installation which is connected to two installations of the type described above. , one being for transporting coal powder and the other for iron ore powder.
  • the enclosure 64 can also designate a blast furnace and the installation described will be used for the injection of lignite into this blast furnace 64.
  • the lignite will be extracted from the tank 50 and propelled pneumatically to be injected into each nozzles.
  • the transfer 66 may consist of a single pipe, in the case of lignite, it is necessary to provide a certain number of pipes depending on the number of nozzles, preferably one line for each pair of nozzles.
  • valves 18, 22, 24 and 26 are closed, while the valves 10, 16 and 40 are open.
  • the lignite powder flows by gravity from the tank 2 and is introduced by the propeller 12 into the metering container 14.
  • a signal of command is triggered which stops the action of the propeller 12, closes the valves 16 and 40 and opens the valves 18, 22 and 26.
  • the valve 24 remains, in principle, closed and will only be opened when necessary to increase the degree of fluidity of the content of the dosing container 14.
  • the valve 22 controls the admission of pressurized air into the upper part of the dosing container 14 in order to cause the flow of lignite powder through the bottom of this container.
  • the pressure of the air admitted into the container 14 is substantially equal to that of the supply line 20, that is to say 3.5 bars.
  • the valve 18 will be adjusted automatically according to the content of the metering container so that it is emptied in a predetermined time.
  • the valve 26 will be adjusted as a function of the valve 18 in order to have an optimal proportion between the lignite and the propellant air in the pipe 42, this proportion being general err of 100 kilos of solid matter per kilo of fresh air.
  • the transport speed in line 42 is approximately 20 meters / second. This speed is determined according to two criteria, namely to avoid deposits (lower limit: 18 meters / second) and for safety reasons, that is to say to avoid backfire.
  • valve 48 remains open.
  • the valves 18, 22, 26 and 48 will be closed. It is preferable to operate in the enclosure 44 with an overpressure of 3.5 bars and for this purpose, it is possible to close the valve 26 only a few moments after the others in order to inject into the container 44 a supplement of pressurized air to reach the overpressure of 3.5 bars.
  • a pressure source specially provided for this purpose such as, for example, an inert gas such as nitrogen.
  • the valves 46 and 52 are open for the transfer of the contents of the container 44 into the tank 50. This obviously implies that the operating program is such that the container 44 must be full and under pressure before the minimum is reached in the tank 50.
  • the flow from the container 44 to the tank 50 is stopped by closing the valves 46 and 52 when the minimum level is reached in the container 44.
  • This minimum level is also determined, for example by means of a gamma-ray probe.
  • the filling operation of the metering container 14 begins again immediately after closing the valve 18 and after aerating the container by opening the valve 40, so that the filling of the metering container 14 is generally performed in parallel with the filling of the reservoir 50.
  • One of the essential attractions of the installation described is that it allows exact control of the quantity of solid material injected into the pressure vessel 64. Since the requirements for lignite are fixed by weight, it is necessary to '' carry out a weight dosage instead of a volumetric dosage, because the specific weight of lignite or other pulverulent materials is not constant. However, it is not possible to carry out a weighing of the reservoir 50 with a view to metering, since this reservoir is constantly under pressure. On the other hand, the container 14, specially provided for this purpose, can be depressurized for weighing and be pressurized for supply.
  • the metering is carried out as required at the level of the enclosure 64 and the signals resulting from the weighing of the container 14 allow, in association with the signals from the level probes, automatic control of the various valves. '' ensure an optimal sequence of different successive operations.
  • the merit of the invention is therefore to have made possible a compatibility between a pneumatic transport and the metering by weight of the transported materials.
  • the pressure of the pneumatic propulsion fluid does not necessarily have to be greater than the pressure in the enclosure 64. This is only the case if this propulsion fluid also serves to pressurize the enclosure 64.

Landscapes

  • 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)
EP80103206A 1979-06-15 1980-06-10 Procédé et installation de dosage et de transport par voie pneumatique de matières solides vers une enceinte sous pression Expired EP0021222B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80103206T ATE3270T1 (de) 1979-06-15 1980-06-10 Verfahren und vorrichtung zur dosierung und zum pneumatischen foerdern und einbringen pulverfoermigen guts in einen unter druck stehenden behaelter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU81388 1979-06-15
LU81388A LU81388A1 (fr) 1979-06-15 1979-06-15 Procede et installation de dosage et de transport par voie pneumatique de matieres solides vers une enceinte sous pression

Publications (2)

Publication Number Publication Date
EP0021222A1 EP0021222A1 (fr) 1981-01-07
EP0021222B1 true EP0021222B1 (fr) 1983-05-11

Family

ID=19729177

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103206A Expired EP0021222B1 (fr) 1979-06-15 1980-06-10 Procédé et installation de dosage et de transport par voie pneumatique de matières solides vers une enceinte sous pression

Country Status (12)

Country Link
US (1) US4437796A (es)
EP (1) EP0021222B1 (es)
JP (1) JPS563224A (es)
AR (1) AR220630A1 (es)
AT (1) ATE3270T1 (es)
AU (1) AU5922980A (es)
BR (1) BR8003755A (es)
CA (1) CA1157661A (es)
DE (1) DE3063092D1 (es)
ES (1) ES492409A0 (es)
LU (1) LU81388A1 (es)
PL (1) PL128689B1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907361A1 (de) * 1989-03-08 1990-09-20 Henkel Kgaa Pulverdosiergeraet

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU81519A1 (fr) * 1979-07-17 1979-10-31 Wurth Anciens Ets Paul Procede et installation d'injection de combustibles solides dans un four a cuve
DE2932867A1 (de) * 1979-08-14 1981-02-26 Maximilianshuette Eisenwerk Verfahren und vorrichtung zum pneumatischen transport von gemahlenen feststoffen in eine metallschmelze
LU82336A1 (fr) * 1980-04-04 1980-07-02 Wurth Anciens Ets Paul Procede et dispositif de pression et de fluidisation d'une masse pulverulente dans une enceinte de distribution
FR2501833B1 (fr) * 1981-03-10 1985-05-31 Stein Industrie Dispositif d'introduction et de combustion d'un combustible solide pulverise dans une enceinte sous pression
LU83671A1 (fr) * 1981-10-02 1983-06-08 Wurth Paul Sa Procede d'injection de quantites dosees de matieres pulverulentes par voie pneumatique dans une enceinte se trouvant sous pression variable et application a un four a cuve
LU83701A1 (fr) * 1981-10-19 1983-06-08 Wurth Paul Sa Dispositif de controle du contenu et du remplissage d'un reservoir de distribution de matieres pulverulentes
JPS5915698U (ja) * 1982-07-19 1984-01-30 株式会社田中衡機工業所 デジタル計量装置付ドラム缶運搬回転機
LU85738A1 (fr) * 1985-01-24 1986-08-04 Wurth Paul Sa Procede et installation d'injection de quantites dosees de matieres pulverulentes par voie pneumatique dans une enceinte sous pression et application a un four a cuve
US4695207A (en) * 1985-07-18 1987-09-22 Pullman Rail Leasing Inc. Pneumatic gate operator and outlet cap
US5009551A (en) * 1988-05-12 1991-04-23 Delaware Investments Corp. Material handling system and control valve therefor
US5296015A (en) * 1990-01-09 1994-03-22 Hylsa S.A. De C.V. Method for the pneumatic transport of large iron-bearing particles
US5445363A (en) * 1990-01-09 1995-08-29 Hylsa S.A. De C.V. Apparatus for the pneumatic transport of large iron-bearing particles
ATE165624T1 (de) * 1991-05-30 1998-05-15 Hylsa Sa Verfahren zum transportieren von eisenschwamm
JP2703690B2 (ja) * 1992-04-13 1998-01-26 三菱マテリアル株式会社 超微粉末の定量バッチ供給装置
AT400447B (de) * 1994-03-04 1995-12-27 Voest Alpine Ind Anlagen Verfahren und anlage zum chargieren von erz
GB0512998D0 (en) * 2005-06-27 2005-08-03 Inbulk Technologies Ltd Pneumatic conveying velocity control device
US20120321395A1 (en) * 2010-03-04 2012-12-20 Envac Ab Waste emptying control
GB2524850B (en) * 2014-07-17 2017-05-10 Clyde Process Solutions Ltd Pneumatic conveying apparatus and method
CN110144426B (zh) * 2019-05-24 2021-11-19 首钢京唐钢铁联合有限责任公司 用于高炉上料配料组罐的控制方法、系统及可读存储介质

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1364215A (fr) * 1962-06-15 1964-06-19 Kellogg M W Co Système d'injection de matières solides fluidifiables par exemple pour des hautsfourneaux
FR1345088A (fr) * 1962-10-24 1963-12-06 Siderurgie Fse Inst Rech Perfectionnements aux procédés de réglage d'injections de produits pulvérulents dans les tuyères des hauts fourneaux
US3240587A (en) * 1962-12-21 1966-03-15 Allied Chem Method for injecting particulate coal into a blast furnace
DE2218355A1 (de) * 1971-04-21 1972-11-02 Sturtevant Engineering Co. Ltd., London Pneumatische Fördereinrichtung und Verfahren zur pneumatischen Materialförderung
DE2703736C2 (de) * 1977-01-29 1982-11-25 Freier Grunder Eisen- Und Metallwerke Gmbh, 5908 Neunkirchen Vorrichtung zum pneumatischen Aufwärtsfördern von staubförmigem oder feinkörnigem Schüttgut

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907361A1 (de) * 1989-03-08 1990-09-20 Henkel Kgaa Pulverdosiergeraet

Also Published As

Publication number Publication date
PL224922A1 (es) 1981-03-13
DE3063092D1 (en) 1983-06-16
BR8003755A (pt) 1981-01-13
JPS563224A (en) 1981-01-14
AU5922980A (en) 1980-12-18
CA1157661A (fr) 1983-11-29
EP0021222A1 (fr) 1981-01-07
PL128689B1 (en) 1984-02-29
US4437796A (en) 1984-03-20
AR220630A1 (es) 1980-11-14
LU81388A1 (fr) 1979-09-12
ES8101009A1 (es) 1980-12-16
ES492409A0 (es) 1980-12-16
ATE3270T1 (de) 1983-05-15

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