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EP3504363B1 - Four d'oxydation - Google Patents

Four d'oxydation Download PDF

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Publication number
EP3504363B1
EP3504363B1 EP17757778.0A EP17757778A EP3504363B1 EP 3504363 B1 EP3504363 B1 EP 3504363B1 EP 17757778 A EP17757778 A EP 17757778A EP 3504363 B1 EP3504363 B1 EP 3504363B1
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EP
European Patent Office
Prior art keywords
flow
blowing
gas
oxidation furnace
primary
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EP17757778.0A
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German (de)
English (en)
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EP3504363A1 (fr
Inventor
Lars Meinecke
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Onejoon GmbH
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Onejoon GmbH
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
    • D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
    • D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
    • D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
    • D01F9/32—Apparatus therefor
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/001—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass in a tube or vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/28—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity for treating continuous lengths of work
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B9/3005—Details, accessories or equipment specially adapted for furnaces of these types arrangements for circulating gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/10—Arrangements for using waste heat

Definitions

  • the blowing device comprises, for example, several blowing boxes from which the working atmosphere enters the process chamber.
  • the process air extracted by the primary extraction device is guided in a circuit to the primary blowing device by means of a circulation device and is subjected to conditioning in the process.
  • the experts refer to this as an oxidation furnace operating according to the "end-to-end” principle. This means that the process air is guided through the process chamber from one end to the other end of the oxidation furnace.
  • Such "end-to-end” oxidation furnaces are known, for example, from the EP 0 848 090 B1 known.
  • a pressure gradient forms across the height of the oxidation furnace, which results from a superposition of the negative pressure in the process chamber caused by the flowing process air and the thermal pressure gradient caused by the hot process air rising upwards.
  • the resulting pressure gradient causes harmful air to escape through the passage areas in the upper part of the oxidation furnace and cold air from the furnace environment to be sucked in through passage areas in the lower part of the oxidation furnace. Further relevant information can be found in the documents US 6 027 337 , US 2013/171578 , US 2013/167397 , JP 2002 115125 and US 2012/304479 .
  • the invention is based on the finding that by means of a secondary gas flow, which defines a second blown-in flow to the primary gas flow, a type of counterflow can be created, through which the pressure gradient explained above can be homogenized, so to speak, so that there is no longer a pressure gradient at the blowing-in end and a flow seal is created, so that no more harmful air flows to the outside and no more cold air from the furnace environment flows into the interior.
  • the flow sealing device comprises a secondary gas deflection device, by means of which the secondary gas flow is deflected in such a way that secondary gas flows partly in the direction towards the process chamber and partly in the direction away from the process chamber.
  • the proportions of the partial flows in the total volume flow of the secondary gas should be adjustable.
  • the secondary gas deflection device comprises a discharge guide device on the secondary injection device and a deflection element, wherein a flow channel is formed between the discharge guide device and the deflection element.
  • the deflection element is movable and the flow channel is variable.
  • primary gas can be blown into each sub-chamber by means of the primary gas blowing device and secondary gas can be blown into each sub-chamber by means of the secondary blowing device.
  • a secondary gas deflection device is also provided in each sub-chamber.
  • a favorable solution for supplying the primary and secondary gas is for the primary injection device to comprise one or more primary injection boxes and the secondary injection device to comprise one or more secondary injection boxes.
  • a primary blowing box and a secondary blowing box which are arranged in the same subspace, are arranged directly next to each other and blow in primary gas or secondary gas in opposite directions.
  • a fresh gas supply device is provided at the blow-in end of the housing, by means of which fresh gas can be blown into the interior, wherein the fresh gas supply device is arranged in particular on the side of the secondary suction device remote from the process space.
  • Figure 1 shows a vertical section of an oxidation furnace 10 used for the production of carbon fibers.
  • the oxidation furnace 10 comprises a housing 12 which has a The passage space forming the interior 14 of the oxidation furnace 10 is delimited by a bottom wall 12a, a ceiling wall 12b and two vertical longitudinal walls, of which Figure 1 only one longitudinal wall 12c lying behind the cutting plane is visible.
  • the housing 12 has an end wall 16a, 16b, with through openings in the form of horizontal inlet slots 18 and outlet slots 20 alternating from bottom to top in the end wall 16a and through openings in the form of horizontal outlet slots 20 and inlet slots 18 alternating from bottom to top in the opposite end wall 16b, which do not all have a reference number for the sake of clarity.
  • Fibers 22 are led into and out of the interior 14 through the inlet and outlet slots 18 and 20, respectively.
  • the inlet and outlet slots 18, 20 generally form passage areas of the housing 12 for the carbon fibers 22. Apart from these through openings, the housing 12 of the oxidation furnace 10 is gas-tight.
  • the interior space 14 is in turn divided into three areas in the longitudinal direction and comprises a first pre-chamber 24, which is arranged directly next to the end wall 16a, a second pre-chamber 26, which is directly adjacent to the opposite end wall 16b, and a process space 28 located between the pre-chambers 24, 26.
  • the pre-chambers 24 and 26 thus simultaneously form an inlet and outlet lock for the fibers 22 into the interior space 14 and the process space 28, respectively.
  • the fibers 22 to be treated are fed to the interior 14 of the oxidation furnace 10 in a parallel manner as a kind of fiber carpet 30.
  • the fibers 22 enter the pre-chamber 26 from a first deflection region 32, which is located next to the front wall 16b outside the furnace housing 12, through the uppermost inlet slot 18 in the front wall 16b.
  • the fibers 22 are then fed through the process chamber 28 and through the opposite pre-chamber 24 to a second deflection region 34, which is located next to the front wall 16a outside the furnace housing 12, and from there back again.
  • the fibers 22 pass through the process chamber 28 in a serpentine fashion over deflection rollers 36 that follow one another from top to bottom, only two of which have a reference number. Between the deflection rollers 36, the fiber carpet 30 formed by the large number of fibers 22 running next to one another spans a plane, with a partial space 38 of the interior space 14 being defined above and below these planes.
  • Figure 1 In the embodiment shown, five such subspaces 38.1, 38.2, 38.3, 38.4, 38.5 are defined from bottom to top.
  • the course of the fibers 22 can also be from bottom to top and there can also be more or fewer levels than in Figure 1 shown and accordingly more or fewer subspaces 38 of the interior space 14 can be defined.
  • the fibers 22 After the entire passage through the process chamber 28, the fibers 22 leave the oxidation furnace 10 in the present embodiment through the lowest exit slot 20 in the front wall 16b. Before reaching the uppermost entrance slot 18 in the front wall 16b and after leaving the oxidation furnace 10 through the lowest exit slot 20 in the front wall 16b, the fibers 22 are guided outside the furnace housing 12 via further guide rollers, not specifically shown.
  • the process chamber 28 is flowed through by a hot working atmosphere 40, which is created by an atmosphere device 42.
  • a hot working atmosphere 40 can be generated with the atmosphere device 42 and blown into the process chamber 28, which flows through the process chamber 28 under process conditions.
  • the working atmosphere is air, which is why the term air is chosen as a synonym for all gases that contribute to the atmosphere balance of the oxidation furnace 10 and we speak of process air, circulating air, exhaust air, fresh air and the like; however, other gases can also be passed through the process chamber 28.
  • the oxidation furnace 10 is designed according to the so-called "end-to-end” principle and defines an injection end 44 with an injection device 46 and an extraction end 48 with a primary extraction device 50, between which the working atmosphere 40 is guided in a main or process flow direction 52 through the process chamber 28.
  • the injection end 44 is located at the end of the oxidation furnace with the front wall 16b, the suction end 48 at the opposite end with the front wall 16a.
  • all arrows visible in the figures illustrate flows or flow directions.
  • the working atmosphere 40 is conveyed through a circulation line 54 with a blower 56 and flows through a conditioning device 58, which is illustrated as a heat exchanger 60 by way of example, since the temperature of the working atmosphere 40 is set in particular by the conditioning device 58.
  • a conditioning device 58 which is illustrated as a heat exchanger 60 by way of example, since the temperature of the working atmosphere 40 is set in particular by the conditioning device 58.
  • an exhaust air line 62 with a valve branches off from the circulation line 54, via which a portion of the circulated working atmosphere 40 can be discharged.
  • the proportionately flowing off exhaust gas volume is balanced by a fresh air supply device 64, which is provided at the blow-in end 44 of the oxidation furnace 10 and there in the prechamber 24.
  • the fresh air supply device 64 comprises several supply channels 66 fed with fresh air, which are arranged in the sub-chambers 38 and only one of which has a reference number.
  • the supply channels 66 extend transversely to the process flow direction 52 and thus transversely to the longitudinal direction of the furnace.
  • FIG. 2 shows one in Figure 1 The dashed-line section of subspace 38.3 marked II is shown in an enlarged view.
  • each feed channel 66 has an outlet side 68 which points in the direction of the front wall 16a and through which fresh air is discharged across the width of the oxidation furnace 10 in the direction away from the process chamber 28.
  • Each feed channel 66 is assigned a guide plate 70 which is arranged in front of the outlet side 68 so that the exiting fresh air flows out in the direction of the fibers 22.
  • sheet metal All components referred to here and below as sheet metal or the like may be made of metal and thus possibly a structural sheet or may also be made of a non- made of metallic material; the term "sheet metal" is intended to define the relatively thin design of such components.
  • the gases discharged via the exhaust air line 62 which may also contain toxic components, are fed to a thermal afterburner.
  • the heat recovered in this way can at least be used to preheat the fresh air supplied to the oxidation furnace 10.
  • the air reaches the injection device 46 via the circulation line 54. This releases the now circulated and conditioned air as process air into the process chamber 28. During the serpentine passage of the fibers 22 through the process chamber 28, the fibers 22 are now washed by hot, oxygen-containing process air and are thereby oxidized.
  • the injection device 46 now comprises in each sub-chamber 38 a blowing box 72, of which Figure 1 only the blowing box 72 in the sub-chamber 38.3 bears a reference number and in Figure 2 is shown on a larger scale; only there do the other components of the blowing device 46 described below also have reference numerals.
  • the moving fiber carpet 30 is stretched in the free spaces between the blowing boxes 72 arranged one above the other in the vertical direction.
  • the blowing boxes 72 are divided by a partition wall 74 into a primary blowing box 76 and a secondary blowing box 78.
  • the circulation line 54 branches into two supply arms 54a, 54b, one of which is connected to the primary boxes 76 and the secondary boxes 78, respectively, so that the primary boxes 76 and the secondary boxes 78 are supplied with circulated air.
  • the primary boxes 76 each have a flow-open primary outlet window 80 which extends transversely to the longitudinal direction of the furnace and through which primary gas, i.e. in this case primary air, flows into the process chamber 28.
  • These primary outlet windows 80 of the injection device 46 point in the direction of the opposite primary extraction device 50. In this way, a primary injection device 46a is formed.
  • Open in terms of flow technology means that a gas flow can flow through the windows described here and below.
  • the windows can be by omitting a respective wall. If necessary, a wall can also be provided with flow passages.
  • the secondary boxes 78 of the blowing boxes 72 have a fluidically open secondary outlet window 82 on the side opposite the primary outlet window 80, which consequently points in the direction of the end wall 16a and through which secondary gas, i.e. secondary air in this case, flows into the prechamber 24 of the oxidation furnace 10 in the direction opposite to the process flow direction 52.
  • a secondary blowing device 46b is formed in this way, through which secondary gas can be blown into the sub-chambers 38 on the side of the primary blowing device 46a remote from the process chamber 28.
  • the primary injection device 46a and the secondary injection device 46b can also be formed by separate injection boxes with corresponding primary and secondary outlet windows instead of by the primary boxes 76 and the secondary boxes 78 which share the partition wall 74.
  • the volume flow ratio between primary air and secondary air is influenced by the position of the respective partition wall 74 in the blower boxes 72 if these are fed via the common fan 56. If the primary boxes 76 and the secondary boxes 78 are each supplied by their own fans, the position of the partition wall 74 is not important. In practice, a ratio of 65%-70% via the primary blower boxes 76 and 35%-30% via the secondary blower boxes 78 has proven to be favorable.
  • the secondary injection device 46b is part of a flow sealing device 84, by means of which the escape of process air contaminated with pollutants from the oxidation furnace 10 is prevented.
  • This flow sealing device 84 also comprises a secondary suction device 86, which has a secondary suction box 88 in each sub-chamber 38, which is arranged at a distance from the secondary injection chamber 78 in the respective sub-chamber 38.
  • a secondary suction box 88 in each sub-chamber 38, which is arranged at a distance from the secondary injection chamber 78 in the respective sub-chamber 38.
  • Figure 1 only the suction box 88 in the subspace 38.3 a reference sign, which again in Figure 2 is shown on a larger scale.
  • the moving fiber carpet 30 is stretched in the free spaces between the secondary suction boxes 88 arranged one above the other in the vertical direction.
  • a flow space 90 of the flow sealing device 84 remains between each secondary blowing device 46b and each secondary suction box 88 in each sub-space 38.
  • the secondary suction boxes 88 each have a fluidically open suction window 92 on the side remote from the secondary blowing device 46b, which consequently points in the direction of the front wall 16a of the housing 12. Air can be sucked out of the interior 14 through the secondary suction boxes 88.
  • the secondary suction boxes 88 are each connected via a valve 94 to a suction line 96, which opens into the circulation line 54 upstream of the blower 56 and, in the present embodiment, also upstream of the conditioning device 58.
  • the suction volume flow for each suction box 88 can be adjusted using the respective valve 94.
  • valves 94 can also be omitted.
  • the flow sealing device 84 also comprises a flow guiding device 98, by means of which the flow conditions in the flow spaces 90 between the secondary injection devices 46b and the secondary suction device 86 can be adjusted.
  • the flow guide device 98 comprises in each sub-chamber 38 a secondary gas deflection device 100, by means of which the secondary gas flow is deflected such that secondary gas flows partly in the direction of the process chamber 28 and partly in the direction away from the process chamber 28.
  • Each secondary gas deflection device 100 in turn comprises a discharge guide device 102 on the secondary outlet window 82 of the secondary injection chamber 78 and a deflection element 104 against which the secondary air from the secondary injection chamber 78 flows.
  • the deflection element 104 is movable so that the distance between the discharge guide device 102 and the deflection element 104 is variable and can be adjusted for each sub-chamber 38.
  • the discharge guide device 102 comprises two guide plates 106 attached to the top and bottom of the secondary outlet window 82 with free outer edges 108, which converge in the outlet direction of the secondary air and whose surfaces facing each other are identified as inner surfaces 106a and whose surfaces facing away from each other are identified as outer surfaces 106b. In this way, an outlet gap 110 for the secondary air is formed between the free edges 108 of the guide plates 106.
  • the secondary air exiting from the secondary outlet window 82 is bundled by the respective inner surfaces 106a of the guide plates 106.
  • the two guide plates 106 run at an angle of 45° with respect to a horizontal plane.
  • the deflection element 104 provides inclined flow surfaces 112, which are each arranged in a horizontal direction opposite the guide plates 106 and between which an inflow surface 114 runs.
  • the inclined flow surfaces 112 run parallel to the outer surfaces 106a of the guide plates 106; the inflow surface 114 runs vertically.
  • the deflection element 104 is designed as a mounting component 116, which is designed to be complementary to a secondary suction box 88, so that it can be placed on the secondary suction box 88 and moved on it.
  • variable flow channel 118 is formed in each sub-chamber 38, through which secondary air can flow upwards and downwards in the direction of the fiber carpets 30 running therein and whose flow cross-section can be adjusted.
  • the oxidation furnace 10 and its flow sealing device 84 now function as follows:
  • primary blowing device 46a and its primary blowing chambers 76 primary air is blown into the process space 28 in the process flow direction 50.
  • secondary blowing device 46b and its secondary blowing boxes 78 secondary air is blown in the opposite direction into the flow spaces 90 of the flow sealing device 84.
  • the discharge volume flow of the primary blowing device 46a and the discharge volume flow of the secondary blowing device 46b are in a constant ratio for each blowing box 72 and can be structurally adjusted via the position of the partition wall 74 in the blowing box 72; in practice, this ratio is 3:1 to 3:2.
  • the secondary air blown into the flow channels 118 is now divided by the secondary gas deflection device 100 and flows up and down in each sub-chamber 38 in the flow channel 118 and then into the flow passages 120 and 122 there.
  • Part of the secondary air then flows in the flow passages 120 into the process chamber 28.
  • Part of the secondary air flows in the flow passages 122 in the opposite direction towards the front wall 16a of the housing 12 to the suction windows 92 of the secondary suction boxes 88. These volume flows, which flow through the flow passages 122 towards the front wall 16a, are sucked out with the aid of the secondary suction device 86 and its secondary suction boxes 88 and returned to the circulation line 54.
  • the deflection element 104 is positioned so that a large distance from the discharge guide device 102 is set, at which the flow channel 118 has no conductive or deflecting effect on the secondary air there.
  • the secondary air in the sub-chamber 38.1 is divided in half into the partial flows through the flow passages 120 and 122, with the pressure loss in both partial flows being the same.
  • the respective secondary air flow in the sub-chambers 38 is increasingly diverted by the guide plates 106 of the discharge guide device 102 and the inclined flow surfaces 112 of the secondary gas deflection device 100 working with them, so that an ever larger proportion of secondary air with a flow direction in the process flow direction 50 results, ie an ever larger proportion of the secondary air flows into the flow passage 120 in the direction of the process chamber 28 and an ever smaller proportion of the secondary air flows into the flow passage 122 in the direction of the front wall 16a of the housing 12.
  • the respective dynamic pressure of the secondary air in the subchambers 38 acts against the positive internal pressure of the oxidation furnace 10, whereby the pressure loss coefficient increases successively from bottom to top from subchamber 38 to subchamber 38.
  • the flow channel 118 can be changed by the movable deflection element 104 in such a way that the pressure loss coefficient of one and the other flow path is influenced and thus the pressure loss can be adjusted in both flow directions.
  • the volume flow distribution can be controlled and the pressure gradient over the height of the oxidation furnace 10, which results from the superposition of the negative pressure in the process chamber caused by the flowing process air and the thermal pressure gradient, can be homogenized.
  • a corresponding flow sealing device 84 can also be used in an oxidation furnace whose air supply is operated according to the "end-to-center" principle.
  • secondary air can also be blown in, for example, via separate injection nozzles which are arranged in the sub-chambers 38 and whose delivery direction, delivery pressure and delivery volume flow can be adjusted accordingly, wherein in particular the delivery pressure and the delivery volume flow are increased from bottom to top.
  • FIGS. 3-A to 3-I show various embodiments of the flow sealing device 84, wherein already described and functionally or structurally corresponding components have the same reference numerals as in the Figures 1 or 2 , whereby only essential components are provided with a reference number.
  • the flow sealing devices 84 shown there the flow of the secondary gas can be divided and diverted partly in the direction towards the process chamber 28 and partly in the direction away from the process chamber 28, so that on the one hand the thermal overpressure of the oxidation furnace 10 is balanced and on the other hand an inflow of cold air from outside is prevented.
  • the deflection element 104 and thus the attachment component 116 has only a flat and vertically extending inflow surface 114 without inclined flow surfaces 112. Instead, two inclined flow plates 124 are arranged in the flow channel 118. In the present embodiment, these flow plates 124 run parallel to the horizontally adjacent guide plate 106; other angles of attack are possible, however. Depending on the position of the attachment component 116, the flow proportions of the secondary air can be adjusted.
  • This embodiment also has the inclined flow plates 124, which here no longer run parallel to the guide plates 106, but rather run steeper relative to a horizontal plane.
  • the flow plates 124 each have a flow flap 130 in an articulated manner, which can be adjusted between a first closed position, in which their free ends rest against the separating plate 128, and a second closed position, in which their free ends rest against the free ends of the guide plates 106.
  • the flow path between the flow plates 124 and the outer surface 126 of the secondary suction box 88 is blocked, whereas in the second closed position the flow path between the guide plates 106 and the flow plates 124 is blocked.
  • the flow proportions of the secondary air can be adjusted.
  • rotatable throttle flaps 132 are provided, by means of which the flow path between the flow plates 124 and the outer surface 126 of the secondary suction box 88 can be optionally blocked or opened with different flow cross sections.
  • the flow path between the guide plates 106 and the flow plates 124 always remains free in this embodiment.
  • FIG. 3-D corresponds approximately to the embodiment of Figure 3-C , whereby there is no separating plate and instead of the immovable flow plates 124 there are two pivotable flow plates 134 in the upward and downward flow direction. Depending on their inclination, the flow proportions of the secondary air change.
  • the embodiment according to Figure 3-G shows a variant in which the guide plates 106 are pivotably mounted.
  • further pivot plates 144 are mounted on largely horizontal walls 146, which in turn are attached to the secondary suction box 88, which ensures that the pivot plates 144 are at a distance from the outer surface 126.
  • the guide plates 106 and the further pivot plates 144 can be pivoted parallel or not parallel to one another; the flow proportions of the secondary air in both directions change depending on the positions of the guide plates 106 or the further pivot plates 144.
  • Pivotable guide plates 148 are now mounted on the outer surface 126 of the secondary suction box 88, the hinged ends of which are each arranged near the center of the secondary suction box 88 in the vertical direction.
  • the pivotable guide plates 148 have a curved course in the direction into the flow channel 118. Depending on the position of the pivotable guide plates 148, the flow proportions of the secondary air in the direction toward the process chamber 28 and in the direction away from the process chamber 28 can be adjusted.
  • flow wedge strips 150 are arranged between the guide plates 106 and the secondary suction box 88, each of which defines an inclined guide surface 152 that is parallel to the horizontally adjacent guide plate 106 and points in the direction of the guide plates 106.
  • the flow wedge strips 150 In the direction of the flat and vertically running inflow surface 114 of the secondary suction box 88, the flow wedge strips 150 each have a guide surface 154 that also runs vertically.
  • the inner edge of the flow wedge strips 150 relative to the flow channel 118 is arranged at the same height as the free edges 108 of the guide plates 106 adjacent in the horizontal direction.
  • a hollow guide box 156 is movably mounted between the flow wedges 150 and the guide plates 106, which has an upper and a lower wall 158 and 160, respectively, which in turn have a closed section 158a and 160a, respectively, and a section 158b and 160b provided with flow passages.
  • the sections 158b and 160b provided with flow passages have an extension in the horizontal direction that corresponds to the distance between the flow wedge strips 150 and the secondary suction box 88.
  • the front side of the guide box 156 in the direction of the injection box 72 is open, whereas the front side of the guide box 156 in the direction of the secondary suction box 88 is closed by an end wall 162.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Furnace Details (AREA)
  • Inorganic Fibers (AREA)
  • Tunnel Furnaces (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (12)

  1. Four d'oxydation pour le traitement oxydatif de fibres, notamment pour la fabrication de fibres de carbone, avec
    a) un logement (12) avec un espace interne (14) qui est étanche au gaz à l'exception de régions de passage (18, 20) pour les fibres (22) ;
    b) un espace de processus (28) se trouvant dans l'espace interne (14) du logement (12) ;
    c) des poulies de renvoi (34) qui guident les fibres (22) en tant que tapis de fibres (30) de manière juxtaposée en serpentin à travers l'espace de processus (28), dans lequel le tapis de fibres (30) entre des poulies de renvoi opposées (34) couvre à chaque fois un plan, dans lequel un espace partiel (38) de l'espace interne (14) est défini au-dessus et en dessous de ces plans ;
    d) un dispositif d'insufflation primaire (46a) disposé à une extrémité d'insufflation (44) du logement (12) et un dispositif d'aspiration primaire (50) entre lesquels s'étend l'espace de processus (28), dans lequel un gaz primaire peut être insufflé dans un espace partiel (38) au moyen du dispositif d'insufflation primaire (46a) de telle sorte que le gaz de processus traverse l'espace de processus (28) dans une direction d'écoulement de processus (50) ; caractérisé en ce que
    e) un dispositif d'étanchéité d'écoulement (84) est prévu, au moyen duquel un gaz secondaire peut être insufflé dans l'espace partiel (38) avec un dispositif d'insufflation secondaire (46b) sur le côté éloigné de l'espace de processus (28) du dispositif d'insufflation primaire (46a).
  2. Four d'oxydation selon la revendication 1, caractérisé en ce que le gaz secondaire insufflé s'écoule en partie en direction de l'espace de processus (28) et s'écoule en partie à l'écart de l'espace de processus (28).
  3. Four d'oxydation selon la revendication 2, que le coefficient de perte de pression du trajet d'écoulement du gaz secondaire dans l'espace partiel (38) peut être réglé.
  4. Four d'oxydation selon une des revendications 1 à 3, caractérisé en ce que le dispositif d'étanchéité d'écoulement (84) comprend un dispositif de déviation de gaz secondaire (100) à travers lequel le courant de gaz secondaire est dévié de telle sorte que du gaz secondaire s'écoule en partie en direction de l'espace de processus (28) et s'écoule en partie à l'écart de l'espace de processus (28).
  5. Four d'oxydation selon la revendication 4, caractérisé en ce que le dispositif de déviation de gaz secondaire (100) comprend un dispositif de direction d'évacuation (102) sur le dispositif d'insufflation secondaire (46b) et un élément de déviation (104), dans lequel un canal d'écoulement (118) est formé entre le dispositif de direction d'évacuation (102) et l'élément de déviation (104).
  6. Four d'oxydation selon la revendication 5, caractérisé en ce que l'élément de déviation (104) est mobile et le canal d'écoulement (118) peut être modifié.
  7. Four d'oxydation selon une des revendications 1 à 6, caractérisé en ce que du gaz primaire peut être insufflé dans chaque espace partiel (38) au moyen du dispositif d'insufflation de gaz primaire (46a) et du gaz secondaire peut être insufflé dans chaque espace partiel (38) au moyen du dispositif d'insufflation secondaire (46b).
  8. Four d'oxydation selon la revendication 7, caractérisé en ce qu'un dispositif de déviation de gaz secondaire (100) selon une des revendications 4 à 6 est prévu dans chaque espace partiel (38).
  9. Four d'oxydation selon une des revendications 1 à 8, caractérisé en ce que le dispositif d'insufflation primaire (46a) comprend une ou plusieurs caisses d'insufflation primaires (76) et le dispositif d'insufflation secondaire (46b) comprend une ou plusieurs caisses d'insufflation secondaires (78).
  10. Four d'oxydation selon la revendication 9, caractérisé en ce qu'une caisse d'insufflation primaire (76) et une caisse d'insufflation secondaire (78) qui sont disposées dans un même espace partiel (38) sont disposées directement côte à côte et insufflent du gaz primaire ou du gaz secondaire dans des directions opposées.
  11. Four d'oxydation selon une des revendications 1 à 10, caractérisé en ce qu'un dispositif d'aspiration secondaire (86) est présent, au moyen duquel le courant partiel du gaz secondaire qui s'écoule à l'écart de l'espace de processus (28) peut être aspiré.
  12. Four d'oxydation selon une des revendications 1 à 11, caractérisé en ce qu'un dispositif d'alimentation en gaz frais (64), au moyen duquel du gaz frais peut être insufflé dans l'espace interne (14), est présent à l'extrémité d'insufflation (44) du logement (12), dans lequel le dispositif d'alimentation en gaz frais (64) est disposé en référence à la revendication 10 notamment sur le côté éloigné de l'espace de processus (28) du dispositif d'aspiration secondaire (86).
EP17757778.0A 2016-08-29 2017-08-28 Four d'oxydation Active EP3504363B1 (fr)

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PCT/EP2017/071554 WO2018041781A1 (fr) 2016-08-29 2017-08-28 Four d'oxydation

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DE102014009244B4 (de) 2014-06-20 2016-07-28 Eisenmann Se Oxidationsofen
DE102014009243B3 (de) 2014-06-20 2015-11-19 Eisenmann Ag Oxidationsofen
DE102016116057A1 (de) 2016-08-29 2018-03-15 Eisenmann Se Oxidationsofen
JP6729819B1 (ja) 2018-11-12 2020-07-22 東レ株式会社 耐炎化繊維束および炭素繊維束の製造方法ならびに耐炎化炉
CN110578189B (zh) * 2019-09-18 2024-03-15 浙江精工集成科技股份有限公司 一种预氧化炉用回风箱及预氧化炉
CN110578190B (zh) * 2019-09-18 2024-03-15 浙江精工集成科技股份有限公司 一种预氧化炉回风口网孔板的在线抽插结构及预氧化炉
CN114775114B (zh) * 2022-03-03 2022-12-23 新创碳谷集团有限公司 一种预氧化炉气封装置
CN115652481B (zh) * 2022-11-11 2024-11-19 吉林凯美克化工有限公司 一种碳纤维生产线及碳纤维生产工艺
CN116949606A (zh) * 2023-06-21 2023-10-27 新创碳谷集团有限公司 一种预氧化炉端部主气流回风腔结构及孔位布置方法

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WO2018041781A1 (fr) 2018-03-08
US20190194830A1 (en) 2019-06-27
US11053611B2 (en) 2021-07-06
CN109642356B (zh) 2023-03-03
DE102016116057A1 (de) 2018-03-15
JP6948385B2 (ja) 2021-10-13
EP3504363A1 (fr) 2019-07-03
JP2019532191A (ja) 2019-11-07

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