EP0056943A2 - Gas sampling and temperature measuring probe in a shaft furnace - Google Patents

Gas sampling and temperature measuring probe in a shaft furnace Download PDF

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Publication number
EP0056943A2
EP0056943A2 EP82100133A EP82100133A EP0056943A2 EP 0056943 A2 EP0056943 A2 EP 0056943A2 EP 82100133 A EP82100133 A EP 82100133A EP 82100133 A EP82100133 A EP 82100133A EP 0056943 A2 EP0056943 A2 EP 0056943A2
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EP
European Patent Office
Prior art keywords
sheath
gas
block
spacers
probe
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.)
Granted
Application number
EP82100133A
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German (de)
French (fr)
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EP0056943A3 (en
EP0056943B1 (en
Inventor
Pierre Mailliet
Victor Kremer
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Paul Wurth SA
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Paul Wurth SA
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Priority to AT82100133T priority Critical patent/ATE10113T1/en
Publication of EP0056943A2 publication Critical patent/EP0056943A2/en
Publication of EP0056943A3 publication Critical patent/EP0056943A3/en
Application granted granted Critical
Publication of EP0056943B1 publication Critical patent/EP0056943B1/en
Expired legal-status Critical Current

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    • 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

Definitions

  • the present invention relates to a probe for taking gas samples and thermal measurements in a tank furnace, essentially comprising an external sheath, a series of internal gas pipes connecting gas inlet orifices distributed regularly along the sheath. to a device for receiving gaseous samples outside the oven, thermocouples placed at the level of said orifices and exposed to the gases penetrating through these orifices in the internal pipes, spacers placed transversely in the sheath for holding the pipes gas and one or more cooling circuits passing through the duct.
  • the penetration of such probes into the loading material can be facilitated by a vibrator.
  • thermocouples generally not provide exact measurements, but also, and above all, the measurement error was variable depending on whether the measurement was made by one or the other of the thermocouples.
  • thermocouples generally come from the fact of poor fixing of the thermocouples or even from the total absence of such fixing.
  • the different thermocouples distributed along the probe do not occupy the same relative position with one another and with respect to the gas inlet orifice.
  • These inaccurate positions can be the cause of mounting inaccuracies or changes in position due to thermal and mechanical deformations of the probe due to the vibrator used to drive the probe.
  • the importance of the exact or inaccurate positioning of a thermocouple is measured in the observation that a play of a few millimeters is enough to change or distort the measurements.
  • the determination of the temperature profile results from an approximation based on the measurements made at different points by the probe. It is obvious that if these measurements are inaccurate, it is not possible to establish a curve representative of temperature and the probe loses much of its usefulness.
  • the object of the present invention is to provide a new probe of the aforementioned type, capable of providing exact and reproducible measurements, the assembly of which is easy and rapid and the manufacturing cost of which is reasonable.
  • the probe according to the present invention is essentially characterized in that the interior end of each of the gas pipes is connected to a block of which it is integral and which is fixed to the interior wall of the sheath at level '' an opening provided therein, in that the gas inlet ports are each provided in a plate designed to be fixed through said opening, in a removable manner, on the corresponding block, in that each block and each corresponding plate are designed to define, in the assembled position, a gas inlet chamber communicating with the corresponding gas line and containing an immobile thermocouple and in that an axial section cooling pipe is provided square, passing through corresponding square openings in the spacers.
  • thermocouple Immobilization of the thermocouple is achieved by a flange locked in a circular groove provided partly in a block and partly in the corresponding plate and produced by assembling these two parts.
  • the block being welded itself on the external sheath, each thermocouple is thus completely immobilized in a very precise position which it will preserve in spite of deformations of the probe and of the vibrations to which it is subjected.
  • the spacers are fixed to the blocks, preferably at the rate of two spacers per block.
  • the gas intake ports are all provided on the same generator, facing downwards during the measurement and sampling sessions.
  • the probe generally designated by the reference 1 in FIG. 1 comprises an external cylindrical metallic sheath 12 capped with a point 14 to facilitate penetration through the loading material.
  • This sheath 12 has, at regular intervals, a number of openings 16 to allow the taking of gauze samples inside the oven. These samples are brought through internal pipes 18 to a receiving device outside the oven represented schematically by the reference 20.
  • the openings 16 are all located on the same side on the same generator of the sheath 12. This allows samples to be taken on the same level and eliminates a first source of errors present in probes with openings for taking samples around the probe
  • FIG. 2 shows the construction details at an opening 16.
  • a positioning block 22 receiving the end of a gas pipe 18.
  • the pipe 18- is hermetically fixed, for example by welding, to this block 22 which, in turn, is fixed, also by welding on: the inner face of the sheath 12 opposite the opening 16
  • a plate 24 is fixed, in a removable manner, for example using screws 26, 28 through the opening 16 on the block 22.
  • the plate 24 has an orifice 30 for the admission of gases, communicating with a chamber 32 formed between the plate 24 and the block 22 by opposite semi-cylindrical recesses provided respectively on the block 22 and the plate 24.
  • This chamber 32 will preferably include a refractory lining 34 provided on the block 22 and the plate 24.
  • thermocouples 36 threaded through the pipes 18 and opening into each of the chambers 32.
  • the position of the thermocouples 36 must be good determined and fixed with respect to the opening 16 and with respect to the other thermocouples.
  • each thermocouple 36 is provided with a collar 38 wedged in a peripheral groove formed by semi-circular grooves 40 and 42, provided respectively on the plate. 2.4 and block 22.
  • thermocouple 36 cannot undergo any longitudinal displacement and is easily achievable, given that the flange 38 is simply wedged by the fixing of the plate 24 on the block 22.
  • grooves 40 and 42 must include, as shown in FIG. 3, an interruption 40a, 42a, horizontal or vertical, to allow the passage of gases from the chamber 32 in the pipe 18 connected to the block 22.
  • the probe 10 has eight gas lines 18, 18a, 18b, 18c, 18d, 18e, 18f and 18g; therefore, there are also eight sampling devices and thermocouples, as shown in Figure 2. It is obvious that depending on the diameter of the probe, the diameter of the ovens and the number of samples that l '' we want to take from a radial distance from the oven, we can provide more or less pipes 18.
  • the various gas pipes 18 to 18g are held in place inside the sheath 12 by means of spacers 44 welded to the blocks 22, de.preferrally at the rate of two spacers per block.
  • These spacers 44 are provided at their periphery with semicircular notches 46 in which the conduits between the inner wall of the sheath 12 and the various spacers 44 are maintained.
  • the different pipes 18 to 18g must, in order to be able to communicate with the openings 16 provided on the same generator of the sheath 12, be arranged helically inside the sheath 12, undergoing between two successive openings 16, a rotation of an angle corresponding to the angle of separation of two adjacent notches 46 of the spacers 44.
  • the proposed probe by the invention is provided with a cooling circuit.
  • an axial pipe 48 is provided passing through the various spacers 44 and through which the cooling water is injected. This cooling water returns from the outside, that is to say through the free space between the various pipes 18 to 18g and the outer sheath -12.
  • the pipe 48 has a square section, as do the openings in the spacers 44 for the passage of this pipe 48. This allows, of course, better maintenance of the spacers 44 and lines 18a to 18g, in particular by preventing a relative rotation of these elements between them. It is understood that the section of the pipe 48 may have other shapes than that illustrated, in particular triangular, oval, etc., provided that it is not round.
  • the openings of the spacers must be slightly larger than the section of the pipe. Therefore, to avoid floating, or an oblique orientation of the spacers 44 and blocks 22 relative to the pipe 44 during assembly, it is preferable to provide two spacers 44 per block 22.
  • this support by the axial pipe 48 is especially remarkable during the mounting of the probe 10.
  • this pipe 48 serves to support the spacers 44 and the gas pipes, the whole interior can be assembled of the probe around this pipe 48 by sliding the different spacers 44 and blocks 22 previously welded together on this pipe 48, placing the different pipes 18 to 18g and successively welding them to the corresponding block 22. After that, it suffices to slide the outer sheath 12 over the assembly thus produced and to complete the mounting of the probe by welding the blocks 22 to the sheath 12 and by screwing the plates 24 onto the corresponding blocks 22.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Blast Furnaces (AREA)

Abstract

Plural gas samples are simultaneously collected and the temperature at each sampling point accurately measured by means of a probe which may be inserted into the furnace charge. The probe is constructed so as to facilitate assembly and repair while insuring against relative motion of the various components thereof as a result of imposed vibrations and thermally induced expansion.

Description

La présente invention concerne une sonde de prise d'échantillons gazeux et de mesuresthermiques 'dans un four à cuve, comprenant essentiellement une gaine extérieure, une série de conduites de gaz intérieures reliant des orifices d'admission des gaz répartis régulièrement le long de la gaine à uh dispositif de réception des échantillons gazeux à l'extérieur du four, des thermo-couples disposés au niveau desdits orifices et exposés aux gaz pénétrant à travers ces orifices dans les conduites intérieures, des entretoises placées transversalement dans la gaine pour le maintien des conduites de gaz et un ou plusieurs circuits de refroidissement traversant la gaine.The present invention relates to a probe for taking gas samples and thermal measurements in a tank furnace, essentially comprising an external sheath, a series of internal gas pipes connecting gas inlet orifices distributed regularly along the sheath. to a device for receiving gaseous samples outside the oven, thermocouples placed at the level of said orifices and exposed to the gases penetrating through these orifices in the internal pipes, spacers placed transversely in the sheath for holding the pipes gas and one or more cooling circuits passing through the duct.

Afin de pouvoir exploiter un haut fourneau dans des conditions optimales, il est absolument indispensable de surveiller et de contrôler en permanence sa bonne marche. L'un des moyens mis en oeuvre à cet effet consiste dans l'analyse et dans la mesure de la température d'échantillons gazeux prélevés en des points déterminés à l'intérieur du four, ceci aussi bien au-dessus de la matière de chargement qu'à l'intérieur de celle-ci. Les endroits de prélèvement de ces échantillons doivent être suffisamment nombreux pour pouvoir dresser des courbes sur base de ces mesures. Ce sont ces courbes qui sont appelées à donner une image de la marche du four.In order to be able to operate a blast furnace under optimal conditions, it is absolutely essential to constantly monitor and control its proper functioning. One of the means implemented for this purpose consists in the analysis and in the measurement of the temperature of gas samples taken at determined points inside the furnace, this as well above the loading material. inside it. The places where these samples are taken must be sufficiently numerous to be able to draw curves on the basis of these measurements. These curves are called to give an image of the operation of the oven.

Le prélèvement de ces échantillons gazeux est généralement réalisé au moyen de sondes du genre décrit ci-dessus. Il existe deux types de ces sondes. Les unes sont montées au-dessus de la matière de chargement et y restent en permanence. Les autres sont introduites périodiquement en différents points latéralement à travers la paroi du four dans la masse de la matière de chargement. Un exemple d'une telle sonde est proposé dans le brevet américain 4,044,612.The sampling of these gaseous samples is generally carried out by means of probes of the type described above. There are two types of these probes. Some are mounted above the loading material and remain there permanently. The others are introduced periodically at different points laterally through the wall of the furnace into the mass of the loading material. An example of such a probe is proposed in American patent 4,044,612.

La pénétration de telles sondes dans la matière de chargement peut être facilitée par un vibrateur.The penetration of such probes into the loading material can be facilitated by a vibrator.

Pour que ces sondes puissent avoir réellement l'utilité qu'on leur octroie, il est absolument indispensable que les mesures qu'elles permettent d'effectuer soient exactes et reproductibles. Malheureusement, tel n'était pas le cas jusqu'à présent, surtout en ce qui concerne les mesures de température des échantillons gazeux. En effet, non seulement les thermo-couples ne fournissaient généralement pas des mesures exactes, mais encore, et surtout, l'erreur de mesure était variable suivant que la mesure était effectuée par l'un ou l'autre des thermo-couples.So that these probes can really have the utility which one grants to them, it is absolutely essential that the measurements they allow to be carried out are exact and reproducible. Unfortunately, this has not been the case so far, especially with regard to temperature measurements of gas samples. In fact, not only did the thermocouples generally not provide exact measurements, but also, and above all, the measurement error was variable depending on whether the measurement was made by one or the other of the thermocouples.

La demanderesse a constaté que ces erreurs des mesures thermiques proviennent généralement du fait d'une mauvaise fixation des thermo-couples ou même de l'absence totale d'une telle fixation. Il en résulte que les diffë- rents thermo-couples répartis le long de la sonde n'occupent pas la même position relative entre eux et par rapport à l'orifice d'admission des gaz. A l'origine de ces positions inexactes peuvent être des imprécisions de montage ou des modifications de la position dues aux déformations thermique et mécaniques de la sonde à l'effet du vibrateur servant à enfoncer la sonde. L'importance du positionnement exact ou inexact d'un thermo-couple se mesure dans la constatation qu'un jeu de quelques millimètres suffit pour changer ou fausser les mesures.The Applicant has found that these errors in thermal measurements generally come from the fact of poor fixing of the thermocouples or even from the total absence of such fixing. As a result, the different thermocouples distributed along the probe do not occupy the same relative position with one another and with respect to the gas inlet orifice. These inaccurate positions can be the cause of mounting inaccuracies or changes in position due to thermal and mechanical deformations of the probe due to the vibrator used to drive the probe. The importance of the exact or inaccurate positioning of a thermocouple is measured in the observation that a play of a few millimeters is enough to change or distort the measurements.

Or, la détermination du profil de la température résulte d'une approximation basée sur les mesures effectuées en différents points par la sonde.. Il est évident que si ces mesures sont inexactes, il n'est pas possible d'établir une courbe représentative de la température et la sonde perd une grande partie de son utilité.Now, the determination of the temperature profile results from an approximation based on the measurements made at different points by the probe. It is obvious that if these measurements are inaccurate, it is not possible to establish a curve representative of temperature and the probe loses much of its usefulness.

Ces sondes doivent également répondre à d'autres impératifs, notamment des impératifs économiques et de facilités de montage. En effet, ces sondes, compte tenu du milieu dans lequel elles opèrent, doivent être remplacées souvent et il est, de ce fait, primordial que leur montage et assemblage soient faciles et rapides et que leur prix de revient soit le plus bas possible.These probes must also meet other requirements, in particular economic requirements and ease of assembly. Indeed, these probes, given the environment in which they operate, must be replaced often and it is, therefore, essential that their assembly and assembly are easy and quick and that their cost is as low as possible.

Le but de la présente invention est de prévoir une nouvelle sonde du type précité, capable de fournir des mesures exactes et reproductibles, dont le montage est facile et rapide et dont le coût de fabrication est raisonnable.The object of the present invention is to provide a new probe of the aforementioned type, capable of providing exact and reproducible measurements, the assembly of which is easy and rapid and the manufacturing cost of which is reasonable.

Pour atteindre cet objectif, la sonde selon la présente invention est essentiellement caractérisée en ce que l'extrémité intérieure de chacune des conduites de gaz est reliée à un bloc dont elle est solidaire et qui est fixée sur la paroi intérieure de la gaine au niveau d'une ouverture prévue dans celle-ci, en ce que les orifices d'admission des gaz sont prévus, chacun, dans une plaque conçue pour être-fixée à travers ladite ouverture, de façon démontable, sur le bloc correspondant, en ce que chaque bloc et chaque plaque correspondante sont conçus pour définir, en position assemblée, une chambre d'admission des gaz communiquant avec la conduite des gaz correspondante et renfermant un thermo-couple immobile et en ce qu'il est prévu une conduite de refroidissement axiale à section carrée, traversant des ouvertures carrées correspondantes dans les entretoises.To achieve this objective, the probe according to the present invention is essentially characterized in that the interior end of each of the gas pipes is connected to a block of which it is integral and which is fixed to the interior wall of the sheath at level '' an opening provided therein, in that the gas inlet ports are each provided in a plate designed to be fixed through said opening, in a removable manner, on the corresponding block, in that each block and each corresponding plate are designed to define, in the assembled position, a gas inlet chamber communicating with the corresponding gas line and containing an immobile thermocouple and in that an axial section cooling pipe is provided square, passing through corresponding square openings in the spacers.

L'immobilisation du thermo-couple est réalisée par une collerette bloquée dans une gorge circulaire prévue en partie dans un bloc et en partie dans la plaque correspondante et réalisée par l'assemblage de ces deux pièces. Le bloc étant soudé lui-même sur la gaine extérieure, chaque thermo-couple est ainsi complètement immobilisé dans une position bien précise qu'il conservera en dépit des déformations de la sonde et des vibrations auxquelles elle est soumise.Immobilization of the thermocouple is achieved by a flange locked in a circular groove provided partly in a block and partly in the corresponding plate and produced by assembling these two parts. The block being welded itself on the external sheath, each thermocouple is thus completely immobilized in a very precise position which it will preserve in spite of deformations of the probe and of the vibrations to which it is subjected.

Les entretoises sont fixées sur les blocs, de préférence à raison de deux entretoises par bloc.The spacers are fixed to the blocks, preferably at the rate of two spacers per block.

Les orifices d'admission des gaz sont tous prévus sur une même génératrice tournée vers le bas lors des séances de mesures et de prise d'échantillons.The gas intake ports are all provided on the same generator, facing downwards during the measurement and sampling sessions.

D'autres particularités et caractéristiques ressortiront de la description détaillée d'un mode de réalisation présenté ci-dessous, à titre d'exemple non limitatif, en référence aux dessins, dans lesquels :

  • la Figure 1 montre schématiquement une section longitudinale partielle à travers une sonde selon la présente invention;
  • la Figure 2 montre, approximativement à l'échelle naturelle, la partie de la figure 1 indiquée par le cercle II
  • la Figure 3 représente une coupe transversale suivant le plan III-III sur la figure 2.
Other particularities and characteristics will emerge from the detailed description of an embodiment presented below, by way of nonlimiting example, with reference to the drawings, in which:
  • Figure 1 schematically shows a partial longitudinal section through a probe according to the present invention;
  • Figure 2 shows, approximately on a natural scale, the part of Figure 1 indicated by the circle II
  • FIG. 3 represents a cross section along the plane III-III in FIG. 2.

La sonde désignée globalement par la référence 1 sur la figure 1 comporte une gaine métallique cylindrique extérieure 12 coiffée d'une pointe 14 pour faciliter la pénétration à travers la matière de chargement. Cette gaine 12 comporte, à intervalles réguliers, un certain nombre d'ouvertures 16 pour permettre la prise d'échantillons gaze à l'intérieur du four. Ces échantillons sont amenés à travers des conduites intérieures 18 vers un dispositif de réception à l'extérieur du four représenté schématiquement par la référence 20.The probe generally designated by the reference 1 in FIG. 1 comprises an external cylindrical metallic sheath 12 capped with a point 14 to facilitate penetration through the loading material. This sheath 12 has, at regular intervals, a number of openings 16 to allow the taking of gauze samples inside the oven. These samples are brought through internal pipes 18 to a receiving device outside the oven represented schematically by the reference 20.

Comme on peut déjà le constater sur la figure 1, les ouvertures 16 sont toutes situées du même côté sur une même génératrice de la gaine 12. Ceci permet la prise d'échantillons sur un même niveau et élimine une première source d'erreurs présente dans les sondes dont les ouvertur de prise d'échantillons sont prévues tout autour de la sondAs can already be seen in FIG. 1, the openings 16 are all located on the same side on the same generator of the sheath 12. This allows samples to be taken on the same level and eliminates a first source of errors present in probes with openings for taking samples around the probe

La figure 2 montre les détails constructifs au niveau d'une ouverture 16. Au niveau de chacune de ces ouvertures 16 se trouve un bloc de positionnement 22 recevant l'extrémité d'une conduite de gaz 18. La conduite 18- est fixée hermétiquement, par exemple par soudage, à ce bloc 22 qui, à son tour, est fixé, également par soudage su: la face intérieure de la gaine 12 en face de l'ouverture 16FIG. 2 shows the construction details at an opening 16. At each of these openings 16 is a positioning block 22 receiving the end of a gas pipe 18. The pipe 18- is hermetically fixed, for example by welding, to this block 22 which, in turn, is fixed, also by welding on: the inner face of the sheath 12 opposite the opening 16

Une plaque 24 est fixée, de manière amovible, par exemple à l'aide de vis 26, 28 à travers l'ouverture 16 sur le bloc 22. La plaque 24 comporte un orifice 30 d'admission des gaz, communiquant avec une chambre 32 formée entre la plaque 24 et le bloc 22 par des creux semi-cylindri ques opposés prévus respectivement sur le bloc 22 et la plaque 24. Cette chambre 32 comportera, de préférence, un revêtement réfractaire 34 prévu sur le bloc 22 et la plaque 24.A plate 24 is fixed, in a removable manner, for example using screws 26, 28 through the opening 16 on the block 22. The plate 24 has an orifice 30 for the admission of gases, communicating with a chamber 32 formed between the plate 24 and the block 22 by opposite semi-cylindrical recesses provided respectively on the block 22 and the plate 24. This chamber 32 will preferably include a refractory lining 34 provided on the block 22 and the plate 24.

Les mesures thermiques sont effectuées grâce à des thermo-couples 36 enfilés à travers les conduites 18 et débouchant dans chacune des chambres 32. Comme mentionné ci-dessus, pour assurer des mesures exactes et reproductible il faut que la position des thermo-couples 36 soit bien déterminée et fixe par rapport à l'ouverture 16 et par rapport aux autres thermo-couples. A cet effet, chaque thermo-couple 36 est pourvu d'une collerette 38 coincée dans une rainure périphérique formée par des gorges semi-circulaires 40 et 42, prévues respectivement sur la plaque. 2.4 et le bloc 22.The thermal measurements are carried out using thermocouples 36 threaded through the pipes 18 and opening into each of the chambers 32. As mentioned above, to ensure exact and reproducible measurements, the position of the thermocouples 36 must be good determined and fixed with respect to the opening 16 and with respect to the other thermocouples. To this end, each thermocouple 36 is provided with a collar 38 wedged in a peripheral groove formed by semi-circular grooves 40 and 42, provided respectively on the plate. 2.4 and block 22.

Cette fixation est à la fois efficace étant donné que le thermo-couple 36 ne peut subir aucun déplacement longitudinal et facilement réalisable, étant donné que la collerette 38 est simplement coincée par la fixation de la plaque 24 sur le bloc 22.This fixing is both effective since the thermocouple 36 cannot undergo any longitudinal displacement and is easily achievable, given that the flange 38 is simply wedged by the fixing of the plate 24 on the block 22.

Il est à noter que les gorges 40 et 42 doivent comporter, comme le montre la figure 3, une interruption 40a, 42a, horizontale ou verticale, pour permettre le passage des gaz de la chambre 32 dans la conduite 18 reliée au bloc 22.It should be noted that the grooves 40 and 42 must include, as shown in FIG. 3, an interruption 40a, 42a, horizontal or vertical, to allow the passage of gases from the chamber 32 in the pipe 18 connected to the block 22.

Comme le montre la figure 3, la sonde 10 comporte huit conduites de gaz 18, 18a, 18b, 18c, 18d, 18e, 18f et 18g; par conséquent, il y a également huit dispositifs de prise d'échantillons et thermo-couples, tel que montré sur la figure 2. Il est évident que suivant le diamètre de la sonde, le diamètre des fours et le nombre d'échantillons que l'on veut prélever sur une distance radiale du four, on peut prévoir plus ou moins de conduites 18.As shown in Figure 3, the probe 10 has eight gas lines 18, 18a, 18b, 18c, 18d, 18e, 18f and 18g; therefore, there are also eight sampling devices and thermocouples, as shown in Figure 2. It is obvious that depending on the diameter of the probe, the diameter of the ovens and the number of samples that l '' we want to take from a radial distance from the oven, we can provide more or less pipes 18.

Les différentes conduites de gaz 18 à 18g sont maintenues en place à l'intérieur de la gaine 12 au moyen d'entretoises 44 soudées sur les blocs 22, de.préférence à raison de deux entretoises par bloc. Ces entretoises 44 sont pourvues à leur périphérie d'encoches 46 semi-circulaires dans lesquelles sont maintenues les conduites entre la paroi intérieure de la gaine 12 et les différentes entretoises 44.The various gas pipes 18 to 18g are held in place inside the sheath 12 by means of spacers 44 welded to the blocks 22, de.preferrally at the rate of two spacers per block. These spacers 44 are provided at their periphery with semicircular notches 46 in which the conduits between the inner wall of the sheath 12 and the various spacers 44 are maintained.

Comme le montre la figure 1, les différentes conduites 18 à 18g doivent, pour pouvoir communiquer avec les ouvertures 16 prévues sur une même génératrice de la gaine 12, être disposées hélicoidalement à l'intérieur de la gaine 12, en subissant entre deux ouvertures successives 16, une rotation d'un angle correspondant à l'angled'écartement de deux encoches voisines 46 des entretoises 44.As shown in Figure 1, the different pipes 18 to 18g must, in order to be able to communicate with the openings 16 provided on the same generator of the sheath 12, be arranged helically inside the sheath 12, undergoing between two successive openings 16, a rotation of an angle corresponding to the angle of separation of two adjacent notches 46 of the spacers 44.

Tout comme les sondes existantes, la sonde proposée par l'invention est pourvue d'un circuit de refroidissement. A cet effet, il est prévu une conduite axiale 48 traversant les différentes entretoises 44 et à travers laquelle on injecte l'eau de refroidissement. Cette eau de refroidissement retourne par l'extérieur, c'est-à-dire' par l'espace libre entre les différentes conduites 18 à 18g et la gaine extérieure -12.Like the existing probes, the proposed probe by the invention is provided with a cooling circuit. To this end, an axial pipe 48 is provided passing through the various spacers 44 and through which the cooling water is injected. This cooling water returns from the outside, that is to say through the free space between the various pipes 18 to 18g and the outer sheath -12.

Conformément à une des caractéristiques de la présente invention, on profite de la présence de la conduite de refroidissement axiale 48 pour concevoir un moyen de support des conduites de gaz. En effet, comme on peut le voir sur la figure 3, la conduite 48 possède une section carrée, de même que les ouvertures dans les entretoises 44 pour le passage de cette conduite 48. Ceci permet, bien entendu, un meilleur maintien des entretoises 44 et des conduites 18a à 18g, notamment en enpêchant une rotation relative de ces éléments entre eux. Il est bien entendu que la section de la conduite 48 peut avoir d'autres formes que celle illustrée, notamment triangulaire, ovale, etc., pourvu qu'elle ne soit pas ronde.According to one of the characteristics of the present invention, advantage is taken of the presence of the axial cooling pipe 48 to design a means for supporting the gas pipes. Indeed, as can be seen in FIG. 3, the pipe 48 has a square section, as do the openings in the spacers 44 for the passage of this pipe 48. This allows, of course, better maintenance of the spacers 44 and lines 18a to 18g, in particular by preventing a relative rotation of these elements between them. It is understood that the section of the pipe 48 may have other shapes than that illustrated, in particular triangular, oval, etc., provided that it is not round.

Cette conception du maintien mutuel entre la conduite 48 et les entretoises est avantageuse dans la mesure oi ces éléments ne peuvent pas être soudés ensemble à cause de leurs dilatations thermiques différentes.This concept of mutual maintenance between the pipe 48 and the spacers is advantageous insofar as these elements cannot be welded together because of their different thermal expansions.

Pour permettre le montage, il est évident que les ouvertures des entretoises doivent être légèrement plus grandes que la section de la conduite. De ce fait, pour éviter un flottement, ou une orientation oblique des entretoises 44 et blocs 22 par rapport à la conduite 44 lors du montage, il est préférable de prévoir deux entretoises 44 par bloc 22.To allow the assembly, it is obvious that the openings of the spacers must be slightly larger than the section of the pipe. Therefore, to avoid floating, or an oblique orientation of the spacers 44 and blocks 22 relative to the pipe 44 during assembly, it is preferable to provide two spacers 44 per block 22.

L'effet de ce soutien par la conduite axiale 48 est surtout remarquable lors du montage de la sonde 10. En effet, étant donné que cette conduite 48 sert de support aux entretoises 44 et aux conduites des gaz, on peut assembler tout l'intérieur de la sonde autour de cette conduite 48 en glissant les différentes entretoises 44 et blocs 22 préalablement soudés ensemble sur cette conduite 48, en plaçant les différentes conduites 18 à 18g et en les soudant successivement au bloc correspondant 22. Après cela, il suffit de glisser la gaine extérieure 12 sur l'ensemble ainsi réalisé et d'achever le montage de la sonde en soudant les blocs 22 à la gaine 12 et en vissant les plaques 24 sur les blocs correspondants 22.The effect of this support by the axial pipe 48 is especially remarkable during the mounting of the probe 10. In fact, since this pipe 48 serves to support the spacers 44 and the gas pipes, the whole interior can be assembled of the probe around this pipe 48 by sliding the different spacers 44 and blocks 22 previously welded together on this pipe 48, placing the different pipes 18 to 18g and successively welding them to the corresponding block 22. After that, it it suffices to slide the outer sheath 12 over the assembly thus produced and to complete the mounting of the probe by welding the blocks 22 to the sheath 12 and by screwing the plates 24 onto the corresponding blocks 22.

Claims (7)

1. - Sonde de prise d'échantillons gazeux et de mesures thermiques dans un four à cuve, comprenant essentiellement une gaine extérieure (12); une série, de conduites de gaz intérieures (18, 18a, 18b, 18c, 18d, 18e, 18f et 18g) reliant des orifices d'admission des gaz (16, 30) répartis régulièrement le long de la gaine (12) à un dispositif de réception des échantillons gazeux à l'extérieur du four, des thermo-couples (36) disposés au niveau desdits orifices (30) et exposés aux gaz pénétrant à travers ces orifices dans les conduites intérieures (18), des entretoises (44) placées transversalement dans la gaine (12) pour le maintien des conduites de gaz (18) et un ou plusieurs circuits de refroidissement traversant la gaine (12), caractérisée en ce que l'extrémité intérieure de chacune des conduites de gaz (18) est reliée à un bloc (22) dont elle est solidaire et qui est fixée sur la paroi intérieure de la gaine (12) au niveau d'une ouverture (16) prévue dans celle-ci, en ce que les orifices d'admission des gaz (30) sont prévus, chacun, dans une plaque (24) conçue pour être fixée à travers ladite ouverture (16), de façon démontable, sur le bloc (22) correspondant, en ce que chaque bloc (22) et chaque plaque (24) correspondante sont conçus pour définir, en position.assemblée, une chambre (32) d'admission des gaz communiquant avec la conduite des gaz correspondante (la) et renfermant un thermo-couple (36) immobile et en ce qu'il est prévu une conduite de refroidissement axiale (48) à section carrée, traversant des ouvertures carrées correspondantes dans les entretoises (44).1. - Probe for taking gas samples and thermal measurements in a tank furnace, essentially comprising an external sheath (12); a series of internal gas pipes (18, 18a, 18b, 18c, 18d, 18th, 18f and 18g) connecting gas inlet openings (16, 30) distributed regularly along the sheath (12) to a device for receiving gas samples outside the oven, thermocouples (36) arranged at said orifices (30) and exposed to gases penetrating through these orifices in the interior conduits (18), spacers (44) placed transversely in the sheath (12) to hold the gas pipes (18) and one or more cooling circuits passing through the sheath (12), characterized in that the inner end of each of the gas pipes (18) is connected to a block (22) of which it is integral and which is fixed to the inner wall of the sheath (12) at an opening (16) provided therein, in that the gas inlet orifices (30) are each provided in a plate (24) designed to be fixed through said opening (16), in a disassembled ble, on the corresponding block (22), in that each block (22) and each corresponding plate (24) are designed to define, in position.assembled, a chamber (32) for admitting gases communicating with the pipe of corresponding gas (la) and containing a stationary thermocouple (36) and in that there is provided an axial cooling pipe (48) with square section, passing through corresponding square openings in the spacers (44). 2. - Sonde selon la revendication 1, caractérisée en ce que l'immobilisation du thermo-couple (36) est réalisée par une collerette (38) bloquée dans une gorge circulaire (40,42) prévue en partie dans un bloc (22) et en partie dans la plaque correspondante (24) et réalisée par l'assemblage de ces deux pièces.2. - Probe according to claim 1, characterized in that the immobilization of the thermocouple (36) is achieved by a flange (38) blocked in a circular groove (40,42) provided partly in a block (22) and partly in the corresponding plate (24) and produced by assembling these two parts. 3. - Sonde selon les revendications 1 ou 2, caractérisée en ce que la chambre 32 est pourvue d'un revêtement réfractaire circulaire 34.3. - A probe according to claims 1 or 2, characterized in that the chamber 32 is provided with a circular refractory lining 34. 4. - Sonde selon l'une quelconque des revendications 1 à 3, caractérisée en ce que les entretoises (44) sont fixées sur les blocs (22).4. - Probe according to any one of claims 1 to 3, characterized in that the spacers (44) are fixed on the blocks (22). 5. - Sonde selon la revendication 4, caractérisée en ce que sur chaque bloc (22) sont soudées-deux entretoises (44).5. - Probe according to claim 4, characterized in that on each block (22) are welded-two spacers (44). 6. - Sonde selon l'une quelconque des revendications 1 à 5, caractérisée en ce que chaque entretoise (44) comporte un certain nombre d'encoches périphériques (46) assurant le maintien des conduites de gaz (18a, 18b, 18c, 18d, 18e, 18f et 18g).6. - Probe according to any one of claims 1 to 5, characterized in that each spacer (44) comprises a certain number of peripheral notches (46) ensuring the maintenance of the gas pipes (18a, 18b, 18c, 18d , 18th, 18f and 18g). 7. - Sonde selon la revendication 1, caractérisée en ce que les orifices d'admission des gaz (16, 30) sont tous prévus sur une même génératrice de la gaine (12) tournée vers le bas lors des séances de mesures et de prise d'échantillons.7. - Probe according to claim 1, characterized in that the gas inlet orifices (16, 30) are all provided on the same generator of the sheath (12) turned downwards during the measurement and taking sessions samples.
EP82100133A 1981-01-23 1982-01-11 Gas sampling and temperature measuring probe in a shaft furnace Expired EP0056943B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82100133T ATE10113T1 (en) 1981-01-23 1982-01-11 PROBE FOR GAS SAMPLING AND TEMPERATURE MEASUREMENT IN A TUBE FURNACE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU83087A LU83087A1 (en) 1981-01-23 1981-01-23 PROBE FOR TAKING GAS SAMPLES AND THERMAL MEASUREMENTS IN A TANK OVEN
LU83087 1981-01-23

Publications (3)

Publication Number Publication Date
EP0056943A2 true EP0056943A2 (en) 1982-08-04
EP0056943A3 EP0056943A3 (en) 1982-08-18
EP0056943B1 EP0056943B1 (en) 1984-10-31

Family

ID=19729570

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100133A Expired EP0056943B1 (en) 1981-01-23 1982-01-11 Gas sampling and temperature measuring probe in a shaft furnace

Country Status (11)

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US (1) US4403516A (en)
EP (1) EP0056943B1 (en)
JP (2) JPS57143410A (en)
AT (1) ATE10113T1 (en)
AU (1) AU551025B2 (en)
BR (1) BR8200395A (en)
CA (1) CA1168897A (en)
DE (1) DE3261083D1 (en)
ES (1) ES508962A0 (en)
LU (1) LU83087A1 (en)
ZA (1) ZA82224B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141115A2 (en) * 1983-09-07 1985-05-15 Paul Wurth S.A. Device for determining the surface profile of a shaft furnace charge

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
JPS6156215A (en) * 1984-08-27 1986-03-20 Kawasou Denki Kogyo Kk Measuring probe for shaft furnace such as blast furnace
US4630939A (en) * 1985-11-15 1986-12-23 The Dow Chemical Company Temperature measuring apparatus
US5226729A (en) * 1992-10-07 1993-07-13 Lennox Industries Inc. Averaging temperature probe
FR2805044B1 (en) * 2000-02-11 2002-05-17 Franco Belge Combustibles METHOD AND DEVICE FOR DETERMINING THE DEVELOPMENT OF A CHEMICAL REACTION IN AN OVEN AND FOR ADJUSTING THE REACTION
US20040114665A1 (en) * 2002-12-12 2004-06-17 Sun Park Cantilevered thermocouple rake
DE102006019723B4 (en) * 2006-03-31 2014-12-24 Alstom Technology Ltd. A probe system, arrangement and method for detecting exhaust gas parameters downstream of a gas turbine
WO2008143962A1 (en) * 2007-05-18 2008-11-27 Enviormental Energy Services, Inc. Method for measuring ash/slag deposition in a utility boiler
CN103114165A (en) * 2013-03-14 2013-05-22 济钢集团有限公司 Blast furnace gas sampling and temperature measuring device
CN103602770B (en) * 2013-12-05 2015-05-13 江苏联兴成套设备制造有限公司 Cross-shaped temperature measuring device capable of being replaced online and having early warning function

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DE718766C (en) * 1939-01-07 1942-03-20 Bochumer Ver Fuer Gussstahlfab Device for determining the gas flow in blast furnaces or similar shaft furnaces
US3085435A (en) * 1960-03-15 1963-04-16 United States Steel Corp Method and apparatus for determining conditions at spaced points within a chamber
US3130584A (en) * 1961-02-14 1964-04-28 United States Steel Corp Blast furnace probe
US3637438A (en) * 1965-05-13 1972-01-25 Redwood L Springfield Thermocouple guide

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US3240069A (en) * 1963-09-04 1966-03-15 United States Steel Corp Blast furnace probe
LU65998A1 (en) * 1972-09-05 1973-01-17
US4044612A (en) * 1977-01-14 1977-08-30 Koppers Company, Inc. Probe for obtaining gas samples from a shaft furnace

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Publication number Priority date Publication date Assignee Title
DE718766C (en) * 1939-01-07 1942-03-20 Bochumer Ver Fuer Gussstahlfab Device for determining the gas flow in blast furnaces or similar shaft furnaces
US3085435A (en) * 1960-03-15 1963-04-16 United States Steel Corp Method and apparatus for determining conditions at spaced points within a chamber
US3130584A (en) * 1961-02-14 1964-04-28 United States Steel Corp Blast furnace probe
US3637438A (en) * 1965-05-13 1972-01-25 Redwood L Springfield Thermocouple guide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0141115A2 (en) * 1983-09-07 1985-05-15 Paul Wurth S.A. Device for determining the surface profile of a shaft furnace charge
EP0141115A3 (en) * 1983-09-07 1987-12-02 Paul Wurth S.A. Device for determining the surface profile of a shaft furnace charge

Also Published As

Publication number Publication date
JPH02140957U (en) 1990-11-26
LU83087A1 (en) 1982-09-10
JPS57143410A (en) 1982-09-04
AU7952382A (en) 1982-07-29
DE3261083D1 (en) 1984-12-06
CA1168897A (en) 1984-06-12
EP0056943A3 (en) 1982-08-18
ES8301355A1 (en) 1982-12-16
ZA82224B (en) 1982-11-24
ES508962A0 (en) 1982-12-16
EP0056943B1 (en) 1984-10-31
ATE10113T1 (en) 1984-11-15
US4403516A (en) 1983-09-13
AU551025B2 (en) 1986-04-17
BR8200395A (en) 1982-11-23

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