EP3158116A1 - Oxidation furnace - Google Patents
Oxidation furnaceInfo
- Publication number
- EP3158116A1 EP3158116A1 EP15730066.6A EP15730066A EP3158116A1 EP 3158116 A1 EP3158116 A1 EP 3158116A1 EP 15730066 A EP15730066 A EP 15730066A EP 3158116 A1 EP3158116 A1 EP 3158116A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- oxidation furnace
- housing
- fibers
- furnace according
- 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.)
- Pending
Links
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
-
- 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
Definitions
- the invention relates to an oxidation furnace for the oxidative treatment of fibers, in particular for the production of carbon fibers, with a) a housing, which is gas-tight except for passage openings for inter alia the fibers; b) a process space located in the interior of the housing; c) pulleys which guide the fibers as fiber carpet next to each other in a serpentine manner through the process space, wherein the fiber carpet each spans a plane between opposing deflection rollers; d) an atmospheric device with which a hot working atmosphere can be generated and which comprises a blowing device with at least one exit window, through which hot working atmosphere between two adjacent planes of the fiber carpet can be blown into the process space; wherein e) enters the working atmosphere via a flow guide into the process space.
- the injection device comprises, for example, a plurality of injection boxes from which the working atmosphere enters the process space.
- An exit window is formed there by an exit wall of a respective injection box having a plurality of flow passages.
- This flow passages define a flow guide accordingly; the flow of the working atmosphere is influenced by their arrangement and geometry.
- blow boxes are permanently installed in the oven and their flow passages usually only poorly accessible.
- the fibers must often be moved at least on the pulleys or partially removed entirely from the process room to perform a sufficient cleaning can.
- the flow guide comprises replaceable flow guide with flow passages which are detachably and / or movably mounted in front of the exit window on the injection device.
- the exit window extends substantially from a first longitudinal wall to an opposite second longitudinal wall of the housing.
- the entire width of the oxidation furnace can be covered and accessed preferably from the longitudinal side of the oxidation furnace forth.
- a flow guide is preferably storable in a holding device.
- the holding device comprises guide rails for a flow guide, which extend along the upper and lower edges of the exit window.
- access means are provided, through which the flow guide is accessible from outside the process space.
- the access means are provided by a passage opening in a longitudinal wall of the housing or by two mutually opposite passage openings in two opposite longitudinal walls of the housing. housing are formed. This is structurally very easy to implement.
- the flow guide is designed as a long plate through which the exit window of the injector is completely covered.
- This long plate may for example be preferably a steel sheet.
- a respective passage opening in only one longitudinal wall of the oxidation furnace is sufficient to exchange flow guide elements.
- two or more flow guide elements in the form of flow guide modules may be present, of which two or more cover an exit window. These then work together, for example, with opposite passage openings in the longitudinal walls of the oxidation furnace, so that in each case at least one of the Strömungsleitmodule is guided through a respective passage opening.
- the flow guide is formed by a winding tape which is stretched and movable between a source roll and a take-up roll along the exit window, so that a portion of the winding tape covers the exit window.
- a winding band can be passed past the exit window intermittently or continuously.
- rollers are arranged outside the housing and the winding band is guided through two mutually opposite passage openings in two opposite longitudinal walls of the housing, the rollers can be handled advantageously, without access to the process space is necessary.
- a cleaning device may be present, through which the winding tape is guided after leaving the process space. In this way, the cleaning can still be done in the oven environment and the cleaned winding tape may be used again in a more direct cycle.
- FIG. 1 shows a vertical section through an oxidation furnace for the production of carbon fibers in the furnace longitudinal direction with an atmosphere device with which a hot working atmosphere can be generated and injected into the process chamber, and a flow guide for homogenizing the atmosphere flow;
- FIG. 2 is a detail perspective view of a blowing device of the atmosphere device and associated flow guide elements of the flow guiding device;
- FIG. 3 shows a section of a cross section of the oxidation furnace with a view of the injection device with a flow-guiding device according to a first exemplary embodiment
- FIG. 4 shows a section corresponding to FIG. 3 with a flow-guiding device according to a second exemplary embodiment
- FIG. 5 shows a section corresponding to FIGS. 3 and 4 with a flow-guiding device according to a third exemplary embodiment
- 6 shows a detail similar to the figures 3 to 5 with a flow guide according to a fourth embodiment
- Figure 7 shows a detail of the section of Figure 1 with
- FIG. 8 shows a section corresponding to FIG. 7 with a further modified flow-guiding device.
- FIG. 1 shows a vertical section of an oxidation furnace which is used for the production of carbon fibers and is denoted overall by 10.
- the oxidation furnace 10 comprises a housing 12 which delimits a passage chamber forming the interior 14 of the oxidation furnace 10 by a ceiling wall 12a and a bottom wall 12b and two vertical longitudinal walls 12c, 12d, of which only the longitudinal wall 12d lying behind the sectional plane can be seen in FIG is.
- the housing 12 each one
- End wall 16a, 16b wherein in the end wall 16a from top to bottom alternately through holes in the form of horizontal entrance slots 18 and exit slots 20 and in the end wall 16b from top to bottom alternately through holes in the form of horizontal exit slots 20 and entrance slots 18 are present for the sake of clarity, not all bear a reference number.
- the input and output slots 18, 20 generally form passage portions of the housing 12 for the carbon fibers 22. Apart from these and further explained below through holes, the housing 12 of the oxidation furnace 10 is gas-tight.
- the inner space 14 is in turn subdivided into three areas in the longitudinal direction and comprises a first prechamber 24, which is arranged directly next to the end wall 16a, a second prechamber 26, which is immediately adjacent to the opposite end wall 16b, and one between the prechambers 24, 26th settled process room 28.
- the antechambers 24 and 26 thus at the same time form an inlet and outlet lock for the fibers 22 in the inner space 14 or the process space 28.
- the fibers 22 to be treated are fed to the interior 14 of the oxidation furnace 10 running in parallel as a type of fiber carpet 22a.
- the fibers 22 from a first deflection region 30, which is located outside of the furnace housing 12 adjacent to the end wall 16a, through the uppermost entrance slot 18 in the end wall 16a in the first pre-chamber 24 a.
- the fibers 22 are then through the process chamber 28 and through the second pre-chamber 26 to a second deflection region 32, which is adjacent to the end wall 16 b outside the furnace housing 12, and returned from there.
- the fibers 22 pass through the process space 28 in a serpentine manner over deflection rollers 34 which follow each other from top to bottom, of which only two bear a reference numeral. Between the pulleys 34, the fiber carpet 22a formed by the plurality of fibers 22 running side by side biases one plane respectively. The course of the fibers can also be done from bottom to top and it can also be spanned more or less levels than shown in Figure 1.
- the fibers 22 leave the oxidation furnace 10 in the present embodiment through the lowermost exit slot 20 in the end wall 16a. Before reaching the uppermost entrance slot 18 in the end wall 16a and after leaving the oxidation furnace through the lowermost exit slot 20 in the end wall 16a, the fibers 22 are guided outside the furnace housing 12 via further guide rollers 36.
- the process space 28 is flowed through under process conditions by a hot working atmosphere 38, which is set up by an atmosphere device 40.
- a hot working atmosphere 38 can be generated with the atmosphere device 40 and blown into the process space 28, which flows through the process space 28 under process conditions.
- the air is conveyed to an air-guiding chamber 46 located behind the drawing plane in FIG. 1, in which it is conditioned and conditioned in a manner not of further interest, in particular its temperature being not specifically shown Heating units is set.
- outlets 48 are provided in the area of Luftleitraumes 46 . These can be used to remove those gas or air volumes which either arise during the oxidation process or enter the process space 28 as fresh air through a supply air device not specifically shown in order to maintain the air budget in the oxidation furnace 10.
- the discharged gases which may also contain toxic components are fed to a thermal afterburning.
- the possible recuperated heat can be used at least for preheating the fresh air supplied to the oxidation furnace 10.
- the air in each case reaches the injection device 42. This transfers the now circulated and conditioned air into the process chamber 28. During the serpentine passage of the fibers 22 through the process space 28, they are now surrounded by hot, oxygen-containing air and oxidized.
- the working atmosphere 38 passes through a flow-conducting device 50 into the process space 28, which will be discussed in more detail below.
- the flow-directing device 50 causes the flow of the working atmosphere 38 between each adjacent fiber carpet 22a over the furnace cross-section is substantially uniform, so that there are no significant differences at different levels, especially at the flow rates and the temperature distribution over the process chamber 28.
- the working atmosphere 38 is flowing in opposite directions in the direction of the deflection areas 30 and 32 in the process space sections 28a, 28b delivered.
- the air streams 38a, 38b flow in opposite directions to the respective suction devices 44, which is illustrated in Figure 1 by corresponding arrows.
- two circulating air circuits are thus closed and the oxidation oven 10 is operated in terms of flow according to the "center-to-end" principle mentioned above. But also all other known flow principles can be implemented.
- the injection device 40 comprises a plurality of injection boxes 52, each of which defines an aerodynamically open exit window 54 of the injection device 40, which each extend transversely to the furnace longitudinal direction.
- the outlet windows 54 point in the direction of the suction device 44 opposite thereto.
- the suction devices 44 in turn each comprise a plurality of suction boxes 56, which provide flow-technically open inlet windows 58 of the suction devices 54, which point in the direction of the respectively opposite blowing device 42.
- Fluidically open means that a gas flow can flow out of the injection device 40 or into the suction device 44 through the respective windows 54 or 58.
- the windows 54, 58 may be formed, for example, in that a respective wall is omitted in the case of the injection boxes 52 or the suction boxes 56.
- a local wall of an injection box 52 or a suction box 56 can also be provided with flow passages.
- the flow-guiding device 50 comprises flow-conducting elements 60 with flow passages 62, wherein in each case at least one flow-guiding element 60 is arranged in front of an outlet window 54 of the injection device 42, ie in the present exemplary embodiment. exit window 54 of an associated injection box 52, is arranged. It is only a flow guide 60 and only a flow passage 62 provided with a reference numeral.
- At least the flow openings 62 of the flow guide 50 must now be cleaned at regular intervals in order to maintain the flow of the working atmosphere 38 reproducible.
- the above-described impurities are removed, which are deposited in the course of operation of the oxidation furnace 10 at the flow passages 62.
- the flow guide elements 60 are each designed exchangeably and mounted releasably and / or movably in front of a respective exit window 54 on the injection device 42.
- the flow-guiding device 50 comprises a holding device 64, by means of which the flow elements 60 can be mounted detachably and / or movably.
- the flow passages 62 of the flow guide elements 60 are flowed through by the working atmosphere 38 before they enter the process space 28, these influencing the dispensing direction, the dispensing rate and thereby the flow pressure of the working atmosphere 38.
- the flow passages 62 of the flow guide elements 60 are dimensioned and arranged such that the total flow of the working atmosphere 38 is homogenized over the furnace cross section.
- the flow passages 62 may be identical but also different in their geometry, dimension and arrangement.
- FIG. 3 illustrates a first exemplary embodiment of the flow-conducting device 50.
- a flow guide 60 as a long plate 66 with flow passages 62nd formed, which is dimensioned so that it can completely cover an exit window 54 of the injection device 40.
- the holding device 64 is formed by pairs of guide rails 68a, 68b for the flow guide elements 60, one guide rail 68a at the top and one guide rail 68b at the bottom along an exit window 54 of the injector 42; in each case one pair of rails 68a, 68b can receive a flow-guiding element 60.
- FIGS. 3 to 6 only the pair of rails 68a, 68b on the uppermost injection box 52 is provided with reference numerals.
- the guide rails 68a, 68b extend through a longitudinal wall, in the present example, through the first longitudinal wall 12c of the furnace housing 12, in each of which at the level of each injection box 52 a passage opening in the form of a passage slot 70 is provided so that a flow guide 60 through the Longitudinal wall 12c in the guide rails 68a, 68b and pushed in front of the associated exit window 54 in the interior 14 of the oxidation furnace 10 and can be removed again therefrom.
- the passageways 70 are an example of access means accessible through a flow directing element 60 from outside the process space.
- a door may also be present in a longitudinal wall 12c or 12d which extends beyond the required height of the oxidation furnace 10, so that all the flow guidance elements 60 are accessible when the door is open.
- the uppermost flow-guiding element 60 is shown in a working position in front of the exit window 54 of the uppermost injection box 52.
- the middle flow guide 60 occupies an intermediate position, in which it is about to Half inserted into the guide rails 68a, 68b and since exit window 54 is about half covered. This intermediate position we go through both when inserting and when removing the flow guide 60.
- the un in Figure 3 un flow guide 60 is removed from the interior 14 of the oxidation furnace 10 and there can be exchanged for a non-contaminated flow guide 60, which can then be pushed into the working position in front of the exit window 54 of Figure 3 lower injection box 52, whereby a contaminated flow guide 60 ge gene is replaced by impurities free flow guide 60.
- the flow guide 60 manually removed by a maintenance person from the interior 14 of the oxidation furnace 10 and also in the interior 14 can be circuso ben, carry the flow guide 60 at one end a handle 72.
- a reference numeral sealant present, through which the passage slot 70 is sealed with inserted flow guide 60, so that no furnace atmosphere can escape to the outside.
- FIG. 4 illustrates a second embodiment of the Strömungsleit noisy 50.
- flow guide 60 in the form of plate-shaped Strömungsleitmodulen 74 with flow passages 62 present, of which two side by side cover an exit window 54 and at their handles 72 also not specifically provided with a reference numeral sealing means are present ,
- the Strömungsleitmodule be referred to as Strömungsleitmodule 74 a and 74 b.
- Passage slots 70 are not only in the first longitudinal wall 12c of the oxidation furnace 10, but also in the opposite second longitudinal wall 12d and there at the same height vorgeg see.
- a first Strömungsleitmodul 74 a through the passage slot 70 in the first longitudinal wall 12 c and a second Strömungsleitmodul 74 b are pushed through the passage slot 70 in the second longitudinal wall 12 d of the housing 12, so that a pair of the Strömungsleitmodul 74 a, 74 b as a flow guide 60th a respective exit window 54 of the inflator 42 is covered.
- the guide rails 68a, 68b also extend through the passage slots 70 in the longitudinal wall 12d, as in the case of the longitudinal wall 12c.
- the two flow-guiding modules 74a, 74b are shown in the uppermost injection box 52 in a working position in front of the outlet window 54, in which they jointly form the flow-guiding element 60.
- the flow guide modules 74a, 74b respectively assume an intermediate position in the central injection box in which they each protrude through the passage slots 70.
- the lower flow guide modules 74a, 74b in FIG. 4 are removed from the interior 14 of the oxidation furnace 10 and can there be exchanged for an uncontaminated flow guide module 74a or 74b which then moves into the working position in front of the exit window 54 of FIG Einblaskastens 52 can be pushed.
- FIG. 5 shows a third exemplary embodiment of the flow-guiding device 50, in the case of flow-guiding elements 60 in the form of flow-guiding modules 74, of which more than two cover an exit window 54.
- four plate-shaped Strömungsleitmodule 74 are required for this purpose, with only a few flow modules 74 carry a reference numeral.
- the plurality of flow guide modules 74 are exchanged in operation at intervals, for which they in the intermittent passage from the longitudinal wall 12d in the direction of the longitudinal wall 12c along the guide rails 68a, 68b are moved.
- a flow-guiding module 74 can be attached to the passage slot 70 and pushed into the guide rails 68a, 68b on the side of the longitudinal wall 12d.
- the flow guide module 74 located at the opposite end on the longitudinal wall 12c is pushed out of the guide rails 68a, 68b through the passageway 70 there and can be accepted by a maintenance person.
- the slots 70 are covered in this embodiment by sealing means in the form of movable flaps 78, which may be present in all other described embodiments.
- sealing means in the form of movable flaps 78, which may be present in all other described embodiments.
- flaps 78 other sealing means in the form of, for example brush seals, plate seals or the like may be present. Such seals may also be present in the embodiments of Figures 3 and 4. Changeable plugs can also be used.
- Figures 6 and 7 show a fourth embodiment of the flow guide 50.
- the exit window 54 of a Einblaskastens 52 is each covered by a portion 80 of a winding belt 82 with flow passages 62, which thus defines a flow guide 60.
- the winding tape 82 is in its dimensions complementary to the exit windows 54 of the injector 42 and by two opposite passage slots 70 in the Longitudinal walls 12c, 12d of the furnace housing 12 out.
- passageways 70 in the longitudinal wall 12d each form an entrance opening and through-slots 70 in the opposite longitudinal wall 12c each have an exit opening for an associated winding band 82.
- a rotatably mounted swelling roll 84 on which the winding belt 82 is held and of which the winding belt 82 is guided through the process chamber 28 to the opposite side of the furnace housing 12 to a receiving roller 86, which is also mounted outside of the housing 12 .
- Vertical axes of rotation of the respective source and take-up rolls 84 and 86 are denoted by 84a and 86a, respectively, in FIG.
- the wrapping tape 82 is thus stretched and movable between the two rollers 84, 86 along the exit window 54.
- the wrapping belt 82 is unwound from the swelling roller 84 so that the portion 80 is moved out of the process space 28 and wound onto the takeup roller 86.
- a subsequent, clean section 80 of the winding belt 82 then defines an exchanged flow guide 60, which takes the place of the previous flow guide 60 in the form of the previous Wickelband- section 80.
- FIG. 6 for example, more winding belt 82 has already been unwound from the swelling roller 84 in the lower winding belt 82 than in the upper winding belt 82 running above it.
- FIG. 7 shows this lower winding belt 82.
- the winding belt 82 is moved intermittently.
- the winding belt 82 can also be continuous. lent be moved, as long as the flow of the working atmosphere 38 is not influenced in an undesirable manner by the case taking place movement of the flow passages 62.
- the source rollers 84 and the take-up rollers 86 may each be driven by a serviceman manually or manually for the movement of the wrapping belt 82.
- FIG. 8 shows a variant in which, after leaving the process space 28, the winding belt 82 is guided through the oven longitudinal wall 12d by a cleaning device 88 which is arranged between the passage slot 12d and the take-up roll 86.
- the winding belt 82 is deflected via a deflection roller 90 to the cleaning device 88.
- the winding belt 82 can also enter directly into the cleaning device 88 without deflection roller 90.
- the winding belt 82 is freed of impurities and deposits in the continuous intermittent passage, so that the take-up roller 86 becomes the swelling roller 84 when the winding belt 82 is completely unwound from the original swelling roller 84.
- the Strömungsleitieri 60 are made in practice of sheet steel, which can withstand the furnace atmosphere.
- the winding tape 82 may, for example, from corresponding be manufactured flexible spring steel.
- each suction device 44 is associated with a Absaugleit Rhein 92, which are provided only in Figure 1 with a reference numeral and through which the working atmosphere flows into the respective suction device 44.
- Absaugleit Rhein 92 which are provided only in Figure 1 with a reference numeral and through which the working atmosphere flows into the respective suction device 44.
- corresponding replaceable flow elements can now be provided in an analogous manner, which can be exchanged and cleaned at the appropriate time.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014009244.5A DE102014009244B4 (en) | 2014-06-20 | 2014-06-20 | oxidation furnace |
PCT/EP2015/001215 WO2015192962A1 (en) | 2014-06-20 | 2015-06-16 | Oxidation furnace |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3158116A1 true EP3158116A1 (en) | 2017-04-26 |
Family
ID=53434296
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15730066.6A Pending EP3158116A1 (en) | 2014-06-20 | 2015-06-16 | Oxidation furnace |
Country Status (6)
Country | Link |
---|---|
US (1) | US11236444B2 (en) |
EP (1) | EP3158116A1 (en) |
JP (2) | JP7166742B2 (en) |
CN (1) | CN106461332B (en) |
DE (1) | DE102014009244B4 (en) |
WO (1) | WO2015192962A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014009243B3 (en) | 2014-06-20 | 2015-11-19 | Eisenmann Ag | oxidation furnace |
DE102016116057A1 (en) * | 2016-08-29 | 2018-03-15 | Eisenmann Se | oxidation furnace |
DE102017123739A1 (en) * | 2017-10-12 | 2019-04-18 | Eisenmann Se | Oven and method of treating material |
JPWO2020013339A1 (en) | 2018-07-12 | 2021-08-12 | 株式会社東亜産業 | A fragrance generating base material suitable for an fragrance cartridge, a fragrance generating base material to be heated, an fragrance cartridge provided with a fragrance generating base material to be heated, and a method and an apparatus for manufacturing the fragrance generating base material to be heated. |
CN110578190B (en) * | 2019-09-18 | 2024-03-15 | 浙江精工集成科技股份有限公司 | Online suction and insertion structure of net hole plate of return air inlet of pre-oxidation furnace and pre-oxidation furnace |
CN114517343B (en) * | 2022-03-11 | 2022-08-09 | 新创碳谷控股有限公司 | Carbon fiber pre-oxidation furnace with uniform temperature field |
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DE102016116057A1 (en) | 2016-08-29 | 2018-03-15 | Eisenmann Se | oxidation furnace |
DE102017113342A1 (en) | 2017-06-19 | 2018-12-20 | Eisenmann Se | oven |
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2014
- 2014-06-20 DE DE102014009244.5A patent/DE102014009244B4/en active Active
-
2015
- 2015-06-16 WO PCT/EP2015/001215 patent/WO2015192962A1/en active Application Filing
- 2015-06-16 CN CN201580032913.4A patent/CN106461332B/en active Active
- 2015-06-16 JP JP2016574163A patent/JP7166742B2/en active Active
- 2015-06-16 US US15/320,070 patent/US11236444B2/en active Active
- 2015-06-16 EP EP15730066.6A patent/EP3158116A1/en active Pending
-
2020
- 2020-09-28 JP JP2020161939A patent/JP2021092382A/en active Pending
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JP2008202158A (en) * | 2007-02-19 | 2008-09-04 | Mitsubishi Rayon Co Ltd | Heat-treating furnace and heat-treating method |
EP2738292A1 (en) * | 2011-07-28 | 2014-06-04 | Mitsubishi Rayon Co., Ltd. | Flame-retardant heat treatment furnace |
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Also Published As
Publication number | Publication date |
---|---|
US20170145598A1 (en) | 2017-05-25 |
JP2021092382A (en) | 2021-06-17 |
DE102014009244A1 (en) | 2016-01-07 |
WO2015192962A1 (en) | 2015-12-23 |
DE102014009244B4 (en) | 2016-07-28 |
JP7166742B2 (en) | 2022-11-08 |
JP2017519915A (en) | 2017-07-20 |
CN106461332A (en) | 2017-02-22 |
CN106461332B (en) | 2019-08-23 |
US11236444B2 (en) | 2022-02-01 |
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