WO1998012357A1 - Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid - Google Patents

Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid Download PDF

Info

Publication number
WO1998012357A1
WO1998012357A1 PCT/DE1997/001966 DE9701966W WO9812357A1 WO 1998012357 A1 WO1998012357 A1 WO 1998012357A1 DE 9701966 W DE9701966 W DE 9701966W WO 9812357 A1 WO9812357 A1 WO 9812357A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
dust
measuring
burner
gasifier
Prior art date
Application number
PCT/DE1997/001966
Other languages
German (de)
French (fr)
Inventor
Hado Heckmann
Josef Stockinger
Original Assignee
Deutsche Voest-Alpine Industrieanlagenbau Gmbh
Voest-Alpine Industrieanlagenbau Gmbh
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 Deutsche Voest-Alpine Industrieanlagenbau Gmbh, Voest-Alpine Industrieanlagenbau Gmbh filed Critical Deutsche Voest-Alpine Industrieanlagenbau Gmbh
Priority to BR9711402A priority Critical patent/BR9711402A/en
Priority to EP97942797A priority patent/EP0951570A1/en
Priority to AT909097A priority patent/ATA909097A/en
Priority to SK357-99A priority patent/SK35799A3/en
Priority to PL33223997A priority patent/PL332239A1/en
Priority to AU44506/97A priority patent/AU723335B2/en
Priority to JP51415898A priority patent/JP2001501729A/en
Priority to CA 2266328 priority patent/CA2266328A1/en
Publication of WO1998012357A1 publication Critical patent/WO1998012357A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • C21B5/023—Injection of the additives into the melting part
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/02—Making special pig-iron, e.g. by applying additives, e.g. oxides of other metals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/0006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances
    • G01P13/0066—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances by using differences of pressure in the fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/0006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances
    • G01P13/0073—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances by using vibrations generated by the fluid
    • 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 invention relates to a method for monitoring the operation of a device for supplying an abrasive medium, in particular a dust return to a melter gasifier, the dust drawn off from a melter gasifier or reduction shaft furnace using a fluid via a dust delivery pipe through at least one dust burner in the melter gasifier as an additional carbon carrier is introduced.
  • the method can also in the supply of abrasive media by fluid injection into other melting or combustion devices, such as. B. Fluidized bed reactors are used.
  • the returned dust being the abrasive medium and being used as an additional carbon carrier in the melter gasifier, it is possible to determine in a simple and safe manner whether there is an undesirable backflow of gases and it a corresponding scenario can be triggered, which prevents with certainty that an already mentioned hazard (explosion) occurs.
  • a favorable possibility for this is that the pressure in the melter gasifier and in the dust delivery pipe is monitored at the same time. If a pressure rise in the dust delivery pipe is detected, it can be clearly concluded that an undesired operating state has been reached which could endanger the system in the event that no corresponding pressure rise is detected in the melter gasifier. With such a measurement result, it can be concluded in this case that hot gas or oxygen has penetrated into the dust conveying system of the dust return and must be reacted accordingly in order to eliminate a dangerous state.
  • a particularly advantageous possibility for determining the direction of flow in the dust delivery tube is that at least two measuring channels are guided through the wall of the dust delivery tube, the inclination angles of which have different inclination angles with respect to the longitudinal axis of the dust delivery tube in the measurement plane.
  • one measuring channel can be inclined orthogonally to the longitudinal axis of the dust delivery tube and the second measuring channel at an acute angle to this axis.
  • Such a measuring fluid is particularly suitable for nitrogen, since nitrogen, as a known inert gas, does not pose any risk in the dust return system. stem can lead.
  • the pressure difference is a measure of the flow velocity in the delivery pipe. If a zero adjustment is expediently carried out for the currentless state, a reversal of the flow direction can be concluded from a change in the sign of the pressure difference, which is a prerequisite for the feared case of backflow of hot flame gases or oxygen into a dust delivery pipe.
  • the proposed arrangement of the measuring channels can be adapted to different conditions by means of other variants, in particular by means of other selected inclination angles, of the measuring channels, the pressure values of which are to be compared with one another.
  • the flame monitor has a fuel gas supply and an ignition device, which can be designed, for example, as a glow plug or spark generator. If oxygen arrives at the opening of the dust burner Dust delivery pipe to the Flam ⁇ char is the ignition of the combustible gas mixture and this can be detected via optical or acoustic sensors or via a temperature measurement.
  • Figure 1 is a block diagram of the application of a fluid mechanical measuring principle with two measuring channels
  • FIG. 3 the monitoring of a dust delivery pipe by means of a flame monitor.
  • measuring channels 1 and 2 are designed as bores which are guided through the wall of the dust delivery tube 3.
  • the measuring channels 1 and 2 are designed as bores which are guided through the wall of the dust delivery tube 3.
  • the arrow V c shown in FIG. 1 indicates the direction in which a dangerous situation can occur, ie hot gases or oxygen flows back into the system.
  • the arrangement of the probes which is opposite to the direction of flow can also be used.
  • the measuring channels 1 and 2 are connected via a feed line 4 Nitrogen supplied.
  • the volume flow of nitrogen, which is fed to measuring channels 1 and 2, is kept constant with a control system.
  • Volume flow sensors 5 and 6 with control valves 7 and 8 are provided for this.
  • the absolute pressure in the dust delivery pipe 3 is monitored with a further pressure sensor 11.
  • the pressure difference in measuring channels 1 and 2 is measured with the pressure sensor 12.
  • the pressure difference recorded is a measure of the flow velocity in the delivery pipe. If a zero adjustment is carried out for the currentless state, it can be detected on the basis of a change in the sign of the pressure difference that a backflow has occurred in the dust delivery pipe 3 and a corresponding signal can be generated in order to shut off the oxygen supply.
  • the suitable locking mechanism is not shown in this illustration.
  • the absolute setting values for the two measuring fluid flows through the measuring channels 1 and 2 can be selected favorably, taking into account the required measuring sensitivity and the measuring range for the differential pressure measurement, an optimal range suitable for the monitoring can be set without problems.
  • a zero adjustment of the differential pressure can also be carried out by setting the ratio of the measuring fluid flows.
  • FIG. 2 shows a total of six different possible arrangements of two measuring channels each. The arrangements shown in the top row are chosen so that the corresponding openings of the respective measuring channels are arranged at one point in the dust delivery tube 3.
  • FIG. 3 is a further exemplary embodiment of a monitoring designed according to the invention. given in which a flame detector 13 is used.
  • the flame monitor 13 is at least partially guided through the wall of the dust feed pipe 3 and in the event of a backflow from the melter gasifier via the dust burner, which is also not shown in this illustration, oxygen can reach the area of the flame monitor 13.
  • Flammable gas passes through a feed line 14 through an opening through the flame monitor 13 and can be fed into the dust delivery tube 3, the direction of flow of the fuel gas being shown by the arrows.
  • an ignition device 15 is provided, which can be designed, for example, as a glow plug or spark generator. If oxygen now reaches the area of the flame monitor 13, the fuel gas is ignited with the aid of the ignition device 15 and, in this example, an optical monitor 16 detects whether or not there is oxygen in the dust delivery pipe 3.
  • a protective glass 17 can be arranged in front of an optical system 18, which focuses the light that can be detected during the ignition on a photocell 19.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Processing Of Solid Wastes (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention concerns a method of monitoring the operation of a system for feeding an abrasive medium using fluid as conveying medium for at least one burner in a fusion vaporizer plant. The dust extracted from a fusion vaporizer plant or reduction shaft furnace is to be introduced by means of a fluid and via a dust-conveyer tube through at least one dust burner into the fusion vaporizer plant as an additional carbon-carrier. However, the method can also be applied in other melting or incineration plants, such as for example fluid bed reactors. The object to be achieved by this method is to determine as rapidly as possible whether hot gases or unburned oxygen have/has flowed back into the dust-recycling system. To that end, the flow direction in the feed system conveying pipe is measured downstream of the burner or burners. When backflow of the fluid flow is determined or when the presence of oxygen which has penetrated the feed system is determined, the feed system is stopped.

Description

Verfahren zur Überwachung des Betriebs einer Vorrich- tung zur Zuführung eines abrasiven Mediums mit Hilfe eines Fluids Method for monitoring the operation of a device for supplying an abrasive medium with the aid of a fluid
Die Erfindung betrifft ein Verfahren zur Überwachung des Betriebs einer Vorrichtung zur Zuführung eines abrasiven Mediums , insbesondere einer Staubrückführung in einen Einschmelzvergaser , wobei der aus einem Einschmelzvergaser oder Reduktionsschachtofen abgezogene Staub mit Hilfe eines Fluids über ein Staubförderrohr durch mindestens einen Staubbrenner in den Einschmelzvergaser als zusätzlicher Kohlenstoffträger eingebracht wird . Das Verfahren kann aber auch bei der Zuführung abrasiver Medien mittels Fluidinj ektion in andere Schmelz- oder Verbrennungseinrichtungen , wie z . B . Wirbelschichtreaktoren, eingesetzt werden .The invention relates to a method for monitoring the operation of a device for supplying an abrasive medium, in particular a dust return to a melter gasifier, the dust drawn off from a melter gasifier or reduction shaft furnace using a fluid via a dust delivery pipe through at least one dust burner in the melter gasifier as an additional carbon carrier is introduced. The method can also in the supply of abrasive media by fluid injection into other melting or combustion devices, such as. B. Fluidized bed reactors are used.
Aus der DE 40 41 936 Cl ist es bekannt , aus Einschmelzvergasern oder Reduktionsschachtöfen ausströmende Gase abgeschiedener heisser Stäube wiederum dem Prozeß eines Einschmelzvergasers zuzuführen . Hierbei wird ein Injektor verwendet, um den rückzuführenden Staub über ein Staubförderrohr über mindestens einen Staubbrenner wieder in den Einschmelzvergaser zu geben.From DE 40 41 936 Cl it is known, in turn, to feed gases of separated hot dusts escaping from melting gasifiers or reduction shaft furnaces to the process of a melting gasifier. Here an injector is used to return the dust to be returned to the melter via a dust delivery tube and at least one dust burner.
Während des Betriebes, unter den für Einschmelzvergaser bekannten rauhen Bedingungen, können heiße Gase oder unverbrannter Sauerstoff in das Staubrück- führungssystem zurückströmen. In einem solchen Fall besteht die sehr große Gefahr, daß Anlagenkomponenten beschädigt oder in Folge einer Explosion zerstört werden können.During operation, under the harsh conditions known for melter gasifiers, hot gases or unburned oxygen can flow back into the dust recirculation system. In such a case, there is a very high risk that system components can be damaged or destroyed as a result of an explosion.
Es ist daher Aufgabe der Erfindung, einen solchen Zustand schnellstmöglich zu erfassen und mit Sicherheit zu verhindern, daß es durch rückströmende Gase in das Staubrückführsyste zu einer Gefährdung kommt.It is therefore an object of the invention to detect such a condition as quickly as possible and to prevent with certainty that gases flowing back into the dust return system pose a risk.
Erfindungsgemäß wird diese Aufgabe durch die im An- spruch 1 enthaltenen Merkmale gelöst. Vorteilhafte Ausgestaltungsfσrmen und Weiterbildungen der Erfindung ergeben sich unter Ausnutzung der in den untergeordneten Ansprüchen genannten Merkmale.According to the invention, this object is achieved by the features contained in claim 1. Advantageous embodiments and further developments of the invention result from the use of the features mentioned in the subordinate claims.
Durch die Erfassung der Strömungsrichtung im Förderrohr eines Staubrückführsystemes, wobei der rückgeführte Staub das abrasive Medium ist und im Einschmelzvergaser als zusätzlicher Kohlenstoffträger eingesetzt wird, ist es auf einfache und sichere Wei- se möglich, zu ermitteln, ob ein unerwünschtes Rückströmen von Gasen auftritt und es kann ein entsprechendes Szenario ausgelöst werden, was mit Sicherheit verhindert, daß eine bereits erwähnte Gefährdung (Explosion) auftritt. Eine günstige Möglichkeit hierfür besteht darin, daß gleichzeitig der Druck im Einschmelzvergaser und im Staubförderrohr überwacht wird. Bei Erfassen eines Druckanstieges im Staubförderrohr kann für den Fall, daß kein entsprechender Druckanstieg im Einschmelzvergaser erfaßt wird, eindeutig darauf geschlossen werden, daß ein nicht erwünschter Betriebszustand erreicht worden ist, der eine Gefährdung für das System bewirken kann. Bei einem solchen Meßergebnis kann in diesem Fall darauf geschlossen werden, daß heißes Gas oder Sauerstoff in das Staubfördersystem der Staubrückführung eingedrungen ist und entsprechend reagiert werden muß, um einen Gefahrzustand zu beseitigen.By detecting the direction of flow in the feed pipe of a dust return system, the returned dust being the abrasive medium and being used as an additional carbon carrier in the melter gasifier, it is possible to determine in a simple and safe manner whether there is an undesirable backflow of gases and it a corresponding scenario can be triggered, which prevents with certainty that an already mentioned hazard (explosion) occurs. A favorable possibility for this is that the pressure in the melter gasifier and in the dust delivery pipe is monitored at the same time. If a pressure rise in the dust delivery pipe is detected, it can be clearly concluded that an undesired operating state has been reached which could endanger the system in the event that no corresponding pressure rise is detected in the melter gasifier. With such a measurement result, it can be concluded in this case that hot gas or oxygen has penetrated into the dust conveying system of the dust return and must be reacted accordingly in order to eliminate a dangerous state.
Eine besonders vorteilhafte Möglichkeit für die Bestimmung der Ströraungsrichtung im Staubförderrohr besteht darin, daß durch die Wandung des Staubförderrohres mindestens zwei Meßkanäle geführt sind, deren Neigungswinkel in bezug auf die Längsachse des Staubförderrohres in der Meßebene unterschiedliche Neigungswinkel aufweisen. Hierbei kann ein Meßkanal orthogonal zur Längsachse des Staubförderrohres und der zweite Meßkanal im spitzen Winkel zu dieser Achse geneigt sein.A particularly advantageous possibility for determining the direction of flow in the dust delivery tube is that at least two measuring channels are guided through the wall of the dust delivery tube, the inclination angles of which have different inclination angles with respect to the longitudinal axis of the dust delivery tube in the measurement plane. In this case, one measuring channel can be inclined orthogonally to the longitudinal axis of the dust delivery tube and the second measuring channel at an acute angle to this axis.
Wie dies auch bei anderen Meßmethoden, die auf dem strömungsmechanischen Prinzip beruhen, der Fall ist, wirkt es sich günstig aus, um ein Verstopfen der Meß- kanalöffnungen zu vermeiden, ein Fluid durch diese in den Förderstrom zu führen.As is the case with other measuring methods based on the fluid mechanical principle, it has a favorable effect in order to avoid clogging of the measuring channel openings and to lead a fluid through them into the delivery flow.
Als ein solches Meßfluid bietet sich insbesondere Stickstoff an, da der Stickstoff als bekanntes iner- tes Gas zu keinerlei Gefährdung im Staubrückführsy- stem führen kann.Such a measuring fluid is particularly suitable for nitrogen, since nitrogen, as a known inert gas, does not pose any risk in the dust return system. stem can lead.
Infolge der unterschiedlichen Neigung der Meßkanäle gegenüber der Längsachse des Staubförderrohres sind die Drücke in beiden Meßkanälen - mit Ausnahme desDue to the different inclination of the measuring channels with respect to the longitudinal axis of the dust delivery tube, the pressures in both measuring channels are - with the exception of the
Betriebspunktes, der durch den Nulldurchgang bzw. den Nullabgleich definiert ist -, stets unterschiedlich groß, wobei - unter sonstigen gleichen Bedingungen - die Druckdifferenz ein Maß für die Strömungsgeschwin- digkeit im Förderrohr ist. Wird zweckmäßigerweise ein Nullabgleich für den strömungslosen Zustand durchgeführt, so kann aus einem Vorzeichenwechsel der Druckdifferenz unmittelbar auf eine Umkehrung der Strömungsrichtung geschlossen werden, welche Voraus- setzung für den gefürchteten Fall eines Rückflusses heißer Flammgase oder von Sauerstoff in ein Staubförderrohr ist. Die vorgeschlagene Anordnung der Meßkanäle kann jedoch durch andere Varianten, insbesondere durch andere gewählte Neigungswinkel, der Meßkanäle, deren Druckwerte miteinander verglichen werden sollen, an unterschiedliche Bedingungen angepaßt werden.Operating point, which is defined by the zero crossing or the zero balancing -, always of different sizes, whereby - under other identical conditions - the pressure difference is a measure of the flow velocity in the delivery pipe. If a zero adjustment is expediently carried out for the currentless state, a reversal of the flow direction can be concluded from a change in the sign of the pressure difference, which is a prerequisite for the feared case of backflow of hot flame gases or oxygen into a dust delivery pipe. However, the proposed arrangement of the measuring channels can be adapted to different conditions by means of other variants, in particular by means of other selected inclination angles, of the measuring channels, the pressure values of which are to be compared with one another.
Eine weitere Möglichkeit zur Überwachung des Rück- strömens von Sauerstoff in das Staubrückführungssy- stem besteht darin, daß ein Flammwächter durch die Wandung des Staubförderrohres geführt wird. Hierbei müssen Probleme berücksichtigt werden, die durch mögliche Verstopfungen durch den Staub auftreten können. Negative Einflüsse, die durch schädliche Kompo- nenten (z.B. H2S) im Förderstrσm entstehen, müssen ebenfalls berücksichtigt werden. Der Flammwächter verfügt über eine BrenngasZuführung und eine Zündeinrichtung, die beispielsweise als Glühkerze oder Funkengenerator ausgebildet sein kann. Gelangt Sauer- stσff über die Öffnung des Staubbrenners in das Staubförderrohr an den Flam wächtar erfolgt die Zündung des brennbaren Gasgemisches und diese kann über optische oder akustische Sensoren oder über eine Temperaturmessung erfaßt werden.Another possibility for monitoring the backflow of oxygen into the dust recirculation system is that a flame monitor is guided through the wall of the dust delivery pipe. Problems that may occur due to possible blockages due to dust must be taken into account. Negative influences caused by harmful components (eg H 2 S) in the flow must also be taken into account. The flame monitor has a fuel gas supply and an ignition device, which can be designed, for example, as a glow plug or spark generator. If oxygen arrives at the opening of the dust burner Dust delivery pipe to the Flam wächar is the ignition of the combustible gas mixture and this can be detected via optical or acoustic sensors or via a temperature measurement.
Nachfolgend soll die Erfindung an Hand von Ausführungsbeispielen näher beschrieben werden.The invention will be described in more detail below on the basis of exemplary embodiments.
Dabei zeigt:It shows:
Figur 1 ein Blockschaltbild der Anwendung eines strömungsraechanischen Meßprinzips mit zwei Meßkanälen;Figure 1 is a block diagram of the application of a fluid mechanical measuring principle with two measuring channels;
Figur 2 Varianten für mögliche Meßkanalanordnungen undFigure 2 variants for possible measuring channel arrangements and
Figur 3 die Überwachung eines Staubförderrohres mittels eins Flammwächters.Figure 3, the monitoring of a dust delivery pipe by means of a flame monitor.
Bei dem in Figur 1 gezeigten Prinzip einer Druckdifferenz-Messung, wird diese in zwei Meßkanälen 1 und 2 durchgeführt wird. Die Meßkanäle 1 und 2 sind dabei als Bohrungen, die durch die Wandung des Staubförder- rohres 3 geführt sind, ausgebildet. Dabei ist derIn the principle of a pressure difference measurement shown in FIG. 1, this is carried out in two measuring channels 1 and 2. The measuring channels 1 and 2 are designed as bores which are guided through the wall of the dust delivery tube 3. Here is the
Meßkanal 1 orthogonal zur Längsachse des Staubförderrohres 3 und der Meßkanal 2 im spitzen Winkel geneigt. Der in der Figur 1 eingezeichnete Pfeil Vc gibt die Richtung an, bei der eine Gefahrensituation auftreten kann, also heiße Gase oder Sauerstoff in das System zurückströmt. Prinzipiell läßt sich auch die gegenüber der Strömungsrichtung umgekehrte Anordnung der Sonden verwenden.Measuring channel 1 orthogonal to the longitudinal axis of the dust conveyor tube 3 and the measuring channel 2 inclined at an acute angle. The arrow V c shown in FIG. 1 indicates the direction in which a dangerous situation can occur, ie hot gases or oxygen flows back into the system. In principle, the arrangement of the probes which is opposite to the direction of flow can also be used.
Über eine Zuführleitung 4 wird den Meßkanälen 1 und 2 Stickstoff zugeführt. Der Volumenstrom des Stickstoffs, der den Meßkanälen 1 und 2 zugeführt wird, wird mit einem Regelsystem konstant gehalten. Hierfür sind Volumenstromsensoren 5 und 6 mit Regelventilen 7 und 8 vorhanden. Für die Zuführung des MeßfluidesThe measuring channels 1 and 2 are connected via a feed line 4 Nitrogen supplied. The volume flow of nitrogen, which is fed to measuring channels 1 and 2, is kept constant with a control system. Volume flow sensors 5 and 6 with control valves 7 and 8 are provided for this. For the supply of the measuring fluid
(Stickstoff) ist ein weiteres Ventil 9 in Verbindung mit einem Drucksensor 10 vorhanden.(Nitrogen) there is a further valve 9 in connection with a pressure sensor 10.
Neben der Messung der Druckdifferenz in den Meßkanä- len 1 und 2 wird der Absolutdruck im Staubförderrohr 3 mit einem weiteren Drucksensσr 11 überwacht.In addition to measuring the pressure difference in measuring channels 1 and 2, the absolute pressure in the dust delivery pipe 3 is monitored with a further pressure sensor 11.
Die Druckdifferenz in den Meßkanälen 1 und 2 wird mit dem Drucksensor 12 gemessen. Die erfaßte Druckdiffe- renz ist ein Maß für die Strömungsgeschwindigkeit im Förderrohr. Wird ein Nullabgleich für den strömungslosen Zustand durchgeführt, so kann anhand eines Vorzeichenwechsels der Druckdifferenz detektiert werden, daß ein Rückströmen in das Staubförderrohr 3 aufge- treten ist und ein entsprechendes Signal kann generiert werden, um die Sauerstoffzufuhr zu sperren. Der dafür geeignete Sperrmechanismus ist in dieser Darstellung nicht gezeigt.The pressure difference in measuring channels 1 and 2 is measured with the pressure sensor 12. The pressure difference recorded is a measure of the flow velocity in the delivery pipe. If a zero adjustment is carried out for the currentless state, it can be detected on the basis of a change in the sign of the pressure difference that a backflow has occurred in the dust delivery pipe 3 and a corresponding signal can be generated in order to shut off the oxygen supply. The suitable locking mechanism is not shown in this illustration.
Dadurch, daß die absoluten Einstellwerte für die beiden Meßfluidströme durch die Meßkanäle 1 und 2 unter Berücksichtigung der geforderten Meßempfindlichkeit und des Meßbereiches für die Differenzdruckmessung günstig auszuwählen sind, kann ein für die Über- wachung geeigneter optimaler Bereich problemlos eingestellt werden. Über die Einstellung des Verhältnisses der Meßfluidströme kann außerdem ein Nullabgleich des Differenzdruckes durchgeführt werden.Because the absolute setting values for the two measuring fluid flows through the measuring channels 1 and 2 can be selected favorably, taking into account the required measuring sensitivity and the measuring range for the differential pressure measurement, an optimal range suitable for the monitoring can be set without problems. A zero adjustment of the differential pressure can also be carried out by setting the ratio of the measuring fluid flows.
Durch die parallele Injektion des Meßfluides über die zwei Meßkanäle 1 und 2 und die Messung des Differenzdruckes zwischen diesen beiden Meßkanälen ist der gemessene Wert nahezu unabhängig vom statischen Druck und wird nur mittelbar durch den statischen Druck (nämlich über die Dichte) des verwendeten Gases beeinflußt. Durch geringfügige Neigung der Meßkanäle quer zur Strömungsrichtung (Bohrung in der Wandung des Staubförderrohres 3) kann das ideale Bernoulli- Meßprinzip pdyn = pges - psut nicht realisiert werden und eine entsprechende Meßanordnung muß kalibriert werden.Through the parallel injection of the measuring fluid over the two measuring channels 1 and 2 and the measurement of the differential pressure between these two measuring channels, the measured value is almost independent of the static pressure and is only indirectly influenced by the static pressure (namely via the density) of the gas used. Due to a slight inclination of the measuring channels transversely to the flow direction (hole in the wall of the dust delivery tube 3), the ideal Bernoulli measuring principle p dyn = p ges - p sut cannot be realized and a corresponding measuring arrangement has to be calibrated.
Der Figur 2 sind insgesamt sechs verschiedene mögliche Anordnungen von jeweils zwei Meßkanälen zu ent- nehmen. Dabei sind die in der oberen Reihe dargestellten Anordnungen so gewählt, daß die entsprechenden Öffnungen der jeweiligen Meßkanäle an einem Punkt im Staubförderrohr 3 angeordnet sind.FIG. 2 shows a total of six different possible arrangements of two measuring channels each. The arrangements shown in the top row are chosen so that the corresponding openings of the respective measuring channels are arranged at one point in the dust delivery tube 3.
Es besteht jedoch auch die Möglichkeit, die Meßöffnungen der Meßkanäle lokal getrennt anzuordnen, wie dies der unteren Reihe der Figur 2 zu entnehmen ist. Werden letztere gewählt, ist zu berücksichtigen, daß eventuell eine erhöhte Zeitkonstante, die durch den Abstand der Meßöffnungen bedingt ist, berücksichtigt werden muß, wenn die Druckdifferenz zwischen den Meßkanälen 1 und 2 direkt gemessen wird.However, there is also the possibility of arranging the measuring openings of the measuring channels locally separately, as can be seen in the lower row in FIG. If the latter is chosen, it must be taken into account that an increased time constant, which is caused by the distance between the measuring openings, must be taken into account if the pressure difference between measuring channels 1 and 2 is measured directly.
Ferner kann bei Verwendung der Version mit Anwendung der Meßkanäle in einem Punkt unter bestimmten Umständen eine deutlich höhere Meßerapfindlichkeit als bei der Version mit getrennten Meßstellen erzielt werden.Furthermore, when using the version with the use of the measuring channels at one point, a significantly higher sensitivity to measurement can be achieved under certain circumstances than with the version with separate measuring points.
Der Figur 3 ist ein weiteres Ausführungsbeispiel für eine erfindungsgemäß ausgebildete Überwachung wieder- gegeben, bei der ein Flammwächter 13 Verwendung findet.FIG. 3 is a further exemplary embodiment of a monitoring designed according to the invention. given in which a flame detector 13 is used.
Der Flammwächter 13 ist dabei zumindest teilweise durch die Wandung des Staubförderrσhres 3 geführt und für den Fall einer Rückströmung aus dem Einschmelzvergaser über den in dieser Darstellung ebenfalls nicht erkennbaren Staubbrenner, kann Sauerstoff bis in den Bereich des Flammwächters 13 gelangen. Durch eine Zuleitung 14 gelangt brennbares Gas über eine Öffnung durch den Flammwächter 13 und kann in das Staubförderrohr 3 geführt werden, wobei die Strömungsrichtung des Brenngases den Pfeilen zu entnehmen ist.The flame monitor 13 is at least partially guided through the wall of the dust feed pipe 3 and in the event of a backflow from the melter gasifier via the dust burner, which is also not shown in this illustration, oxygen can reach the area of the flame monitor 13. Flammable gas passes through a feed line 14 through an opening through the flame monitor 13 and can be fed into the dust delivery tube 3, the direction of flow of the fuel gas being shown by the arrows.
Zusätzlich ist eine Zündeinrichtung 15 vorhanden, die beispielsweise als Glühkerze oder Funkengenerator ausgebildet sein kann. Gelangt nunmehr Sauerstoff in den Bereich des Flammwächters 13, wird das Brenngas mit Hilfe der Zündeinrichtung 15 entflammt und in diesem Beispiel mit einer optischen Überwachung 16 erfaßt, ob sich Sauerstoff im Staubförderrohr 3 befindet oder nicht. Für den Schutz der optischen Überwachung 16 kann ein Schutzglas 17 vor einer Optik 18, die das bei der Entflammung erfaßbare Licht auf eine Photozelle 19 fokussiert, vor dieser angeordnet werden.In addition, an ignition device 15 is provided, which can be designed, for example, as a glow plug or spark generator. If oxygen now reaches the area of the flame monitor 13, the fuel gas is ignited with the aid of the ignition device 15 and, in this example, an optical monitor 16 detects whether or not there is oxygen in the dust delivery pipe 3. To protect the optical monitoring 16, a protective glass 17 can be arranged in front of an optical system 18, which focuses the light that can be detected during the ignition on a photocell 19.
Neben der optischen Überwachung des Flammwächters 13 besteht auch die Möglichkeit einen entsprechenden akustischen Sensor oder ein Temperatursensor zu verwenden. In addition to the optical monitoring of the flame monitor 13, there is also the possibility of using a corresponding acoustic sensor or a temperature sensor.

Claims

PatentansprücheVerfahren zur Überwachung des Betriebs einer Vor¬ Process for monitoring the operation of a Vor¬
1. richtung zur Zuführung eines abrasiven Mediums mit Hilfe eines Fluids als Fördermittel über mindestens einen Brenner in einen Einschmelzver¬ gaser, bei dem im Förderrohr des Zufuhrsystems vom Einschmelzvergaser aus betrachtet hinter dem min¬ destens einen Brenner die Strömungsrichtung des Fluidstromes für den Nachweis von in das Zufuhrsy¬ stem aus dem Einschmelzvergaser einströmenden hei¬ ßen Gasen oder Sauerstoff gemessen und bei erfa߬ tem Vorhandensein von eingedrungenem Sauerstof f die Zuführung gesperrt wird.1. direction for feeding an abrasive medium using fluid as conveying means through at least one burner in a Einschmelzver ¬ gasifier, in which in the conveyor tube of the feed system as viewed from the melter gasifier from behind min ¬ least one burner, the flow direction of the fluid flow for the detection of in the Zufuhrsy ¬ stem from the melter gasifier flowing hot gases or oxygen ¬ SEN measured and sensing ¬ tem presence of seeping oxygen supplying f is blocked.
2 . Verfahren nach Anspruch 1 , dadurch gekennzeichnet , daß die Gasdrücke im Einschmelzvergaser und im Förderrohr ( 3 ) vom Einschmelzvergaser aus betrachtet hinter dem mindestens einen Brenner gemessen und bei erfaßtem Anstieg des Druckes im Förderrohr ( 3 ) ohne einen gleichzeitig erfaßten Druckanstieg im Einschmelzvergaser ein Schaltsignal generiert wird . 2nd A method according to claim 1, characterized ekennzeichnet g, that the gas pressures in the gasifier and in the conveyor pipe (3) from the gasifier of view behind the at least measured one burner and at the observed one rise in pressure in the conveyor pipe (3) without a simultaneously sensed increase in pressure in the melter gasifier, a switching signal is generated.
3. Verfahren nach Anspruch 3 , d a d u r c h g e k e n n z e i c h n e t, daß durch die Meßkanäle (1, 2) ein Meßfluid in kleiner Menge im Verhältnis zum Förderstrom in diesen injiziert wird.3. The method according to claim 3, d a d u r c h g e k e n n z e i c h n e t that a measuring fluid in a small amount in relation to the flow rate is injected into this through the measuring channels (1, 2).
4. Verfahren nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t , daß der Volumenstrom des Meßfluids in beiden Meßkanälen (1, 2) konstant gehalten wird.4. The method according to any one of claims 1 to 4, that the volume flow of the measuring fluid in both measuring channels (1, 2) is kept constant.
5. Verfahren nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , daß als Meßfluid ein inertes Gas verwendet wird.5. The method according to any one of claims 1 to 5, d a d u r c h g e k e n n z e i c h n e t that an inert gas is used as the measuring fluid.
6. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß Stickstoff verwendet wird.6. The method according to claim 6, characterized in that nitrogen is used.
7. Verfahren nach Anspruch l, d a d u r c h g e k e n n z e i c h n e t, daß ein im Förderrohr (3) angeordneter Flammwächter (13) optisch oder akustisch überwacht wird. 7. The method according to claim 1, d a d u r c h g e k e n n z e i c h n e t that a flame detector (13) arranged in the conveyor pipe (3) is monitored optically or acoustically.
PCT/DE1997/001966 1996-09-19 1997-09-02 Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid WO1998012357A1 (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BR9711402A BR9711402A (en) 1996-09-19 1997-09-02 Process for monitoring the operation of an abrasive media supply system
EP97942797A EP0951570A1 (en) 1996-09-19 1997-09-02 Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid
AT909097A ATA909097A (en) 1996-09-19 1997-09-02 METHOD FOR MONITORING THE OPERATION OF A DEVICE FOR SUPPLYING AN ABRASIVE MEDIUM WITH THE AID OF A FLUID
SK357-99A SK35799A3 (en) 1996-09-19 1997-09-02 Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid
PL33223997A PL332239A1 (en) 1996-09-19 1997-09-02 Method of monitoring operation of an apparatus for feeding abrasive bay means of carroier fluid
AU44506/97A AU723335B2 (en) 1996-09-19 1997-09-02 Method of monitoring the operation of a device for feeding an abrasive medium by means of a fluid
JP51415898A JP2001501729A (en) 1996-09-19 1997-09-02 Method for monitoring operation of an apparatus for supplying a polishing medium using a fluid
CA 2266328 CA2266328A1 (en) 1996-09-19 1997-09-02 Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1996138346 DE19638346C1 (en) 1996-09-19 1996-09-19 Method for monitoring the operation of a device for supplying an abrasive medium with the aid of a fluid
DE19638346.3 1996-09-19

Publications (1)

Publication Number Publication Date
WO1998012357A1 true WO1998012357A1 (en) 1998-03-26

Family

ID=7806197

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/001966 WO1998012357A1 (en) 1996-09-19 1997-09-02 Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid

Country Status (16)

Country Link
EP (1) EP0951570A1 (en)
JP (1) JP2001501729A (en)
KR (1) KR20000036213A (en)
CN (1) CN1230999A (en)
AT (1) ATA909097A (en)
AU (1) AU723335B2 (en)
BR (1) BR9711402A (en)
CA (1) CA2266328A1 (en)
DE (1) DE19638346C1 (en)
ID (1) ID18315A (en)
PL (1) PL332239A1 (en)
SK (1) SK35799A3 (en)
TR (1) TR199900608T2 (en)
TW (1) TW350877B (en)
WO (1) WO1998012357A1 (en)
ZA (1) ZA977132B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008059930A1 (en) * 2008-12-02 2010-06-10 Uhde Gmbh Apparatus and method for catalytic gas phase reactions and their use

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2361644A1 (en) * 1976-08-12 1978-03-10 Imed Corp AUTOMATIC FLUID AND AIR SENSOR IN A DUCT
US4624684A (en) * 1985-09-03 1986-11-25 Texaco Inc. Process for feeding and gasifying solid carbonaceous fuel
EP0267354A1 (en) * 1986-11-04 1988-05-18 VDO Adolf Schindling AG Apparatus for the determination of the direction of a flow
EP0493752A1 (en) * 1990-12-27 1992-07-08 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Process and apparatus for reinjecting hot dusts
JPH06335628A (en) * 1993-05-31 1994-12-06 Mitsubishi Heavy Ind Ltd Powder feeder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT388388B (en) * 1983-11-24 1989-06-12 Voest Alpine Ag METHOD AND DEVICE FOR MELTING IRON IN A MELT-UP CARBURETTOR
DE3603894A1 (en) * 1986-02-05 1987-08-06 Korf Engineering Gmbh METHOD FOR PRODUCING LIQUID PIPE IRON OR STEEL PRE-MATERIAL

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2361644A1 (en) * 1976-08-12 1978-03-10 Imed Corp AUTOMATIC FLUID AND AIR SENSOR IN A DUCT
US4624684A (en) * 1985-09-03 1986-11-25 Texaco Inc. Process for feeding and gasifying solid carbonaceous fuel
EP0267354A1 (en) * 1986-11-04 1988-05-18 VDO Adolf Schindling AG Apparatus for the determination of the direction of a flow
EP0493752A1 (en) * 1990-12-27 1992-07-08 Deutsche Voest-Alpine Industrieanlagenbau Gmbh Process and apparatus for reinjecting hot dusts
JPH06335628A (en) * 1993-05-31 1994-12-06 Mitsubishi Heavy Ind Ltd Powder feeder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 095, no. 003 28 April 1995 (1995-04-28) *

Also Published As

Publication number Publication date
ID18315A (en) 1998-03-26
JP2001501729A (en) 2001-02-06
KR20000036213A (en) 2000-06-26
TR199900608T2 (en) 1999-07-21
ZA977132B (en) 1998-02-20
EP0951570A1 (en) 1999-10-27
TW350877B (en) 1999-01-21
CN1230999A (en) 1999-10-06
AU723335B2 (en) 2000-08-24
ATA909097A (en) 2001-05-15
BR9711402A (en) 1999-08-17
DE19638346C1 (en) 1998-02-12
CA2266328A1 (en) 1998-03-26
PL332239A1 (en) 1999-08-30
AU4450697A (en) 1998-04-14
SK35799A3 (en) 2000-02-14

Similar Documents

Publication Publication Date Title
EP1370806B1 (en) Method and device for adjusting air/fuel ratio
DE102006005130B4 (en) A fuel injection system and method for monitoring a fuel injection system
EP2313687B1 (en) Method for igniting and operating burners when gasifying carbon-containing fuels
EP1698827A2 (en) Process for burning fuels and more particularly wastes
CH697670B1 (en) Sensor for monitoring a concentration of gaseous fuels in a combustion chamber.
EP1765935B1 (en) Soot generator
EP2531318B1 (en) Wear detection system for a cutting nozzle on a cutting torch for cutting steel workpieces and cutting torch with the wear detection system
DD209681A5 (en) METHOD FOR MONITORING FIRING SYSTEMS
DE3316368C2 (en)
EP0951570A1 (en) Process for monitoring the operation of a device for feeding an abrasive medium by means of a fluid
DE4301082C2 (en) Method for supplying an O¶2¶-containing combustion gas for the combustion of lumpy combustible material in a combustion chamber with the associated grate of an incinerator and device for carrying out the method
DE2902125A1 (en) PROCEDURE AND EQUIPMENT FOR DETERMINING THE PRESENCE OF GAS OR VAPOR IN THE AIR OR OTHER GAS MEDIA
EP1265068A1 (en) Method and apparatus for the determination of changes in the calorific value of a gas mixture
DE10114901A1 (en) Method and device for adjusting the air ratio of a fuel air mixture, measures mass flows and wobbe index and adjusts to give predetermined lambda
DE3919797C2 (en)
DE3024401A1 (en) METHOD FOR CONTROLLED COMBUSTION OF SOLID FOSSIL FUELS, ESPECIALLY CARBON DUST
DE102015110402A1 (en) Nozzle burner system
EP1360669B1 (en) Method and device for monitoring underground installations
EP4086516A1 (en) Gas burner system and method for monitoring the operation of a gas burner system
DE10153643A1 (en) Process for monitoring of a combustion system having a burner supplied with fuel comprises simultaneous monitoring of the flame, the oxidizable components of the exhaust gas, and its temperature using a sensor
DE19637726A1 (en) Fuel combustion monitoring apparatus from formation of exhaust gas esp. for gas turbine
DE10157310C1 (en) Automobile heating device with liquid-fuel burner has fuel feed monitoring device providing signal for control unit for heating device
EP1103766A2 (en) Method and device for flame monitoring with gas burners
EP0750060B1 (en) Apparatus for detecting mass irregularities of a fibre sliver
EP4141322A1 (en) Method and device for reliably operating and regulating a combustion process in a heating apparatus for the combustion of hydrogen

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 97198032.2

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BR CA CN CZ JP KR MX PL RU SK TR UA US VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1997942797

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 1997 9090

Country of ref document: AT

Date of ref document: 19980326

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 19979090

Country of ref document: AT

ENP Entry into the national phase

Ref document number: 1998 514158

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: PV1999-864

Country of ref document: CZ

WWE Wipo information: entry into national phase

Ref document number: PA/a/1999/002487

Country of ref document: MX

ENP Entry into the national phase

Ref document number: 2266328

Country of ref document: CA

Ref document number: 2266328

Country of ref document: CA

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 35799

Country of ref document: SK

Ref document number: 1019997002274

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 1999/00608

Country of ref document: TR

Ref document number: 1199900213

Country of ref document: VN

WWE Wipo information: entry into national phase

Ref document number: 09254967

Country of ref document: US

WWP Wipo information: published in national office

Ref document number: 1997942797

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: PV1999-864

Country of ref document: CZ

WWP Wipo information: published in national office

Ref document number: 1019997002274

Country of ref document: KR

WWW Wipo information: withdrawn in national office

Ref document number: 1997942797

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1019997002274

Country of ref document: KR

WWR Wipo information: refused in national office

Ref document number: PV1999-864

Country of ref document: CZ