EP0529441A1 - Pyrolysis furnace for the thermal cracking of hydrocarbons - Google Patents

Pyrolysis furnace for the thermal cracking of hydrocarbons Download PDF

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Publication number
EP0529441A1
EP0529441A1 EP92113909A EP92113909A EP0529441A1 EP 0529441 A1 EP0529441 A1 EP 0529441A1 EP 92113909 A EP92113909 A EP 92113909A EP 92113909 A EP92113909 A EP 92113909A EP 0529441 A1 EP0529441 A1 EP 0529441A1
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EP
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Prior art keywords
tube
tubes
radiation zone
group
pyrolysis furnace
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Granted
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EP92113909A
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German (de)
French (fr)
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EP0529441B1 (en
Inventor
Hans-Joachim Dipl.-Ing. Holzhausen (Fh)
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Selas Linde GmbH
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Selas Kirchner GmbH
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
    • C10G9/18—Apparatus
    • C10G9/20—Tube furnaces

Definitions

  • the invention relates to a pyrolysis furnace for the thermal splitting of hydrocarbons with a radiation zone, burners and cracking tubes installed therein, the cracking tubes in the radiation zone consisting of parallel, vertically extending straight pipe sections and connecting pipe elbows located in the lower region of the radiation zone, at least in each case Four canned tubes are combined into groups arranged in the same way in the radiation zone, the canned tubes of a group in the lower and upper region of the radiation zone being combined in an outlet tube via tube collecting pieces, the straight tube pieces and the tube collecting pieces of the individual groups being single-row in the transverse direction of the pyrolysis furnace, ie are arranged in one plane.
  • the thermal cracking of hydrocarbons usually takes place in pyrolysis furnaces.
  • a conventional pyrolysis furnace has a radiation zone heated by burners.
  • the thermal splitting of the hydrocarbons is carried out in canned tubes in the radiation zone.
  • the splitting of the hydrocarbons can be facilitated in that the hydrocarbons are preheated in a convection zone of the pyrolysis furnace before being introduced into the radiation zone.
  • FIG. 1 shows an example of the arrangement of the can in the radiation zone of such a pyrolysis furnace.
  • 16 canned tubes are grouped into groups A, B and C.
  • the areas of the individual groups are indicated by dash-dotted lines.
  • the hydrocarbons to be split are fed into the split tubes in the radiation zone from above in the direction of the arrow.
  • the canned pipes run parallel and straight (Z direction) to the lower area of the radiation zone, where two canned pipes are combined via a pipe collecting piece. Pipe bends are connected to the resulting eight canned pipes in the group.
  • Straight, parallel and vertical pipe sections arranged in the Z direction lead from the pipe elbows to the upper region of the radiation zone. There, four pieces of pipe are combined in pipe collectors to form two canned pipes. These two canned tubes are brought together in a further tube collecting piece to form the outlet tube of the respective group.
  • the split hydrocarbons are passed through the three outlet tubes of the groups from the radiation zone of the pyrolysis furnace.
  • the straight pipe sections and the pipe collecting sections of the individual groups are arranged in a single row. They are all on the same level (X / Z level). Only the elbows in the lower area of the radiation zone have projections and protrude from this level.
  • the can is usually suspended in the radiation zone of the pyrolysis furnace. Length extensions caused by temperature changes make it necessary to hang up the can. However, the mechanical loading of the canned tubes is considerable in this case due to their own weight. For this reason, voltage overruns occur especially in the elbows, especially at high temperatures.
  • the invention is therefore based on the object of demonstrating a pyrolysis furnace of the type mentioned at the outset which in a simple manner prevents excess voltages in the can.
  • the arrangement of the canned tubes in the pyrolysis furnace according to the invention requires that the straight pipe sections through which the two halves of a group flow from top to bottom surround the pipe sections through which flow flows from bottom to top laterally in the arrangement plane of the canned pipes in the radiation zone.
  • the radius of curvature of the pipe elbows is considerably reduced, as a result of which the stresses that occur are substantially reduced.
  • the projections of the pipe elbows are also smaller, ie the pipe elbows protrude considerably less from the arrangement level of the can. This also leads to a Reduction of the stresses on the can.
  • the heat distribution over the can of the individual groups is also more uniform.
  • the canned tubes are staggered in steps before entering the radiation zone and a split gas cooler is located above each outlet tube of a group outside the radiation zone in a straight extension of the outlet tubes.
  • the canned tubes are guided around the cracked gas cooler in one step (two 90 ° bends) before entering the radiation zone. This enables a particularly advantageous vertical arrangement of the cracked gas coolers.
  • the canned tubes prefferably be combined into a canned tube with a comparatively enlarged diameter by means of tube collecting pieces. As a result, the pressure loss in the can is kept small.
  • FIG. 2 shows a canned tube arrangement of a pyrolysis furnace according to the invention, which illustrates the invention in a modification of the conventional canned tube arrangement from FIG. 1 according to the prior art.
  • three groups of canned tubes A, B and C are also shown.
  • the hydrocarbons to be split are shown in the direction of the arrow introduced into the pipes at the top.
  • the three groups of canned tubes are staggered (two 90 ° bends) around three cracked gas coolers (not shown) before they run into the radiation zone of the pyrolysis furnace.
  • the cracked gas coolers are located in the extension of the three outlet pipes (arrows pointing in the Z direction).
  • the dashed line symbolizes the upper end of the radiation zone of the pyrolysis furnace.
  • Straight, vertical (Z-direction) pipe sections of the canned tubes extend to the lower area of the radiation zone.
  • two canned tubes are combined to form a tube via a tube collecting piece.
  • the resulting eight canned tubes per group merge into eight elbows, four of which each have approximately the same direction of curvature. A certain deviation in the direction of curvature is caused by the protrusions of the elbows.
  • the arrangement of the pipe elbows enables the eight straight pipe sections of each group, into which the pipe elbows open, to flow from bottom to top, to lie in the plane of arrangement of the can between the straight pipe sections flowing from top to bottom.
  • the straight pipe sections of the groups lie in the arrangement level of the can (X / Z plane).
  • the eight straight pipe sections of each group through which flow flows from bottom to top, are first combined into two split pipes via pipe collectors and into an outlet pipe via a further pipe collector piece. Above the three outlet pipes are the cracked gas coolers, not shown, in a straight extension of the outlet pipes.

Abstract

The invention relates to a pyrolysis furnace for the thermal cracking of hydrocarbons. In the radiant zone of the pyrolysis furnace, cracking tubes are combined into groups arranged in the same way. The cracking tubes in the radiant zone consist of straight, vertically extending pieces of tube, of pieces of tube headers and tube elbows. The cracking tubes of one group are combined in the direction of flow via pieces of tube headers and lead into an outlet pipe. Except for the projections of the tube elbows, the cracking tubes in the radiant zone are arranged in one plane. …<??>According to the invention, the straight pieces of tube bearing an upward flow and combined in the outlet tube are located between the straight pieces of tube bearing a downward flow and leading into the tube elbows. The curvature of in each case one half of the tube elbows of a group is here in the same direction, the direction of curvature of the halves of the tube elbows being the opposite. …<??>Before entering the radiant zone, the cracking tubes can be taken in one step (two 90 DEG curves) around cracked-gas coolers arranged above the outlet tubes. This allows a particularly advantageous vertical arrangement of the cracked-gas coolers.

Description

Die Erfindung betrifft einen Pyrolyseofen zum thermischen Spalten von Kohlenwasserstoffen mit einer Strahlungszone, darin eingebauten Brennern und Spaltrohren, wobei die Spaltrohre in der Strahlungszone aus parallel angeordneten, vertikal verlaufenden geraden Rohrstücken und diese verbindende, im unteren Bereich der Strahlungszone befindlichen Rohrkrümmern bestehen, wobei jeweils zumindest vier Spaltrohre zu gleichartig in der Strahlungszone angeordneten Gruppen zusammengefaßt sind, wobei die Spaltrohre einer Gruppe im unteren und oberen Bereich der Strahlungszone über Rohrsammelstücke jeweils in einem Austrittsrohr vereinigt sind, wobei die geraden Rohrstücke und die Rohrsammelstücke der einzelnen Gruppen in Querrichtung des Pyrolyseofens einreihig, d.h. in einer Ebene, angeordnet sind.The invention relates to a pyrolysis furnace for the thermal splitting of hydrocarbons with a radiation zone, burners and cracking tubes installed therein, the cracking tubes in the radiation zone consisting of parallel, vertically extending straight pipe sections and connecting pipe elbows located in the lower region of the radiation zone, at least in each case Four canned tubes are combined into groups arranged in the same way in the radiation zone, the canned tubes of a group in the lower and upper region of the radiation zone being combined in an outlet tube via tube collecting pieces, the straight tube pieces and the tube collecting pieces of the individual groups being single-row in the transverse direction of the pyrolysis furnace, ie are arranged in one plane.

Die thermische Spaltung (Cracken) von Kohlenwasserstoffen erfolgt üblicherweise in Pyrolyseöfen. Ein herkömmlicher Pyrolyseofen weist eine mit Brennern beheizte Strahlungszone auf. Die thermische Spaltung der Kohlenwasserstoffe wird in Spaltrohren in der Strahlungszone durchgeführt. Die Spaltung der Kohlenwasserstoffe kann dadurch erleichtert werden, daß die Kohlenwasserstoffe vor der Einleitung in die Strahlungszone in einer Konvektionszone des Pyrolyseofens vorgewärmt werden.The thermal cracking of hydrocarbons usually takes place in pyrolysis furnaces. A conventional pyrolysis furnace has a radiation zone heated by burners. The thermal splitting of the hydrocarbons is carried out in canned tubes in the radiation zone. The splitting of the hydrocarbons can be facilitated in that the hydrocarbons are preheated in a convection zone of the pyrolysis furnace before being introduced into the radiation zone.

Unter der Vielzahl der zwischenzeitlich entwickelten Pyrolyseöfen hat sich der eingangs beschriebene Pyrolyseofen besonders bewährt. In Figur 1 ist die Anordnung der Spaltrohre in der Strahlungszone eines derartigen Pyrolyseofens beispielhaft dargestellt. Im gezeigten Beispiel sind jeweils 16 Spaltrohre zu den Gruppen A, B und C zusammengefasst. Die Bereiche der einzelnen Gruppen sind durch strichpunktierte Linien angedeutet. Die zu spaltenden Kohlenwasserstoffe werden entsprechend der Pfeilrichtung von oben in die Spaltrohre in der Strahlungszone geleitet. Die Spaltrohre verlaufen parallel und gerade (Z-Richtung) bis zum unteren Bereich der Strahlungszone, wo jeweils zwei Spaltrohre über ein Rohrsammelstück vereinigt werden. An die resultierenden acht Spaltrohre der Gruppe schließen sich Rohrkrümmer an. Von den Rohrkrümmern führen gerade, parallel und vertikal (in Z-Richtung) angeordnete Rohrstücke zum oberen Bereich der Strahlungszone. Dort werden jeweils vier Rohrstücke in Rohrsammelstücken zu zwei Spaltrohren vereinigt. Diese zwei Spaltrohre sind in einem weiteren Rohrsammelstück zu dem Auslaßrohr der jeweiligen Gruppe zusammengeführt. Die gespaltenen Kohlenwasserstoffe werden durch die drei Auslaßrohre der Gruppen aus der Strahlungszone des Pyrolyseofens geleitet. Die geraden Rohrstücke und die Rohrsammelstücke der einzelnen Gruppen sind einreihig angeordnet. Sie liegen alle in derselben Ebene (X/Z-Ebene). Lediglich die Rohrkrümmer im unteren Bereich der Strahlungszone weisen Auskragungen auf und ragen aus dieser Ebene heraus.Among the large number of pyrolysis furnaces developed in the meantime, the pyrolysis furnace described at the outset has proven particularly successful. FIG. 1 shows an example of the arrangement of the can in the radiation zone of such a pyrolysis furnace. In the example shown, 16 canned tubes are grouped into groups A, B and C. The areas of the individual groups are indicated by dash-dotted lines. The hydrocarbons to be split are fed into the split tubes in the radiation zone from above in the direction of the arrow. The canned pipes run parallel and straight (Z direction) to the lower area of the radiation zone, where two canned pipes are combined via a pipe collecting piece. Pipe bends are connected to the resulting eight canned pipes in the group. Straight, parallel and vertical pipe sections arranged in the Z direction lead from the pipe elbows to the upper region of the radiation zone. There, four pieces of pipe are combined in pipe collectors to form two canned pipes. These two canned tubes are brought together in a further tube collecting piece to form the outlet tube of the respective group. The split hydrocarbons are passed through the three outlet tubes of the groups from the radiation zone of the pyrolysis furnace. The straight pipe sections and the pipe collecting sections of the individual groups are arranged in a single row. They are all on the same level (X / Z level). Only the elbows in the lower area of the radiation zone have projections and protrude from this level.

Die Spaltrohre sind in der Strahlungszone des Pyrolyseofens üblicherweise aufgehängt. Durch Temperaturänderungen verursachte Längenausdehnungen machen das Aufhängen der Spaltrohre erforderlich. Allerdings ist die mechanische Belastung der Spaltrohre aufgrund ihres Eigengewichtes in diesem Fall erheblich. Daher treten insbesondere in den Rohrkrümmern Spannungsüberschreitungen vor allem bei hohen Temperaturen auf.The can is usually suspended in the radiation zone of the pyrolysis furnace. Length extensions caused by temperature changes make it necessary to hang up the can. However, the mechanical loading of the canned tubes is considerable in this case due to their own weight. For this reason, voltage overruns occur especially in the elbows, especially at high temperatures.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Pyrolyseofen der eingangs genannten Art aufzuzeigen, welcher auf einfache Art und Weise Spannungsüberschreitungen in den Spaltrohren verhindert.The invention is therefore based on the object of demonstrating a pyrolysis furnace of the type mentioned at the outset which in a simple manner prevents excess voltages in the can.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Rohrstücke einer Gruppe am Eintritt in die Strahlungszone jeweils zur Hälfte rechts- und linksseitig um das Austrittsrohr der Gruppe angeordnet sind und daß die Rohrkrümmer der einen Hälfte der Gruppe in die entgegengesetzte Richtung weisend wie die Rohrkrümmer der zweiten Hälfte der Gruppe angebracht sind.This object is achieved in that the pipe sections of a group at the entrance to the radiation zone are arranged on the right and left side around the outlet pipe of the group and that the pipe elbows of one half of the group pointing in the opposite direction as the pipe elbows of the second Half of the group are attached.

Die Anordnung der Spaltrohre im erfindungsgemäßen Pyrolyseofen bedingt, daß die von oben nach unten durchströmten, geraden Rohrstücke der beiden Hälften einer Gruppe die von unten nach oben durchströmten Rohrstücke seitlich in der Anordnungsebene der Spaltrohre in der Strahlungszone umgeben. Im erfindungsgemäßen Pyrolyseofen verkleinert sich der Krümmungsradius der Rohrkrümmer erheblich, wodurch die auftretenden Spannungsbelastungen wesentlich verringert werden. Im erfindungsgemäßen Pyrolyseofen sind auch die Auskragungen der Rohrkrümmer geringer, d.h. die Rohrkrümmer ragen wesentlich weniger aus der Anordnungsebene der Spaltrohre heraus. Damit kommt es ebenfalls zu einer Reduzierung der Spannungsbelastungen der Spaltrohre. Im erfindungsgemäßen Pyrolyseofen ist ferner die Wärmeverteilung auf die Spaltrohre der einzelnen Gruppen gleichmäßiger.The arrangement of the canned tubes in the pyrolysis furnace according to the invention requires that the straight pipe sections through which the two halves of a group flow from top to bottom surround the pipe sections through which flow flows from bottom to top laterally in the arrangement plane of the canned pipes in the radiation zone. In the pyrolysis furnace according to the invention, the radius of curvature of the pipe elbows is considerably reduced, as a result of which the stresses that occur are substantially reduced. In the pyrolysis furnace according to the invention, the projections of the pipe elbows are also smaller, ie the pipe elbows protrude considerably less from the arrangement level of the can. This also leads to a Reduction of the stresses on the can. In the pyrolysis furnace according to the invention, the heat distribution over the can of the individual groups is also more uniform.

In Weiterbildung der Erfindung sind die Spaltrohre vor dem Eintritt in die Strahlungszone stufenförmig versetzt angeordnet und ein Spaltgaskühler befindet sich über jedem Austrittsrohr einer Gruppe außerhalb der Strahlungszone in gerader Verlängerung der Auslaßrohre. Die Spaltrohre werden dabei vor dem Eintritt in die Strahlungszone in einer Stufe (zwei 90°-Krümmungen) um die Spaltgaskühler geführt. Somit wird eine besonders vorteilhafte vertikale Anordnung der Spaltgaskühler ermöglicht.In a further development of the invention, the canned tubes are staggered in steps before entering the radiation zone and a split gas cooler is located above each outlet tube of a group outside the radiation zone in a straight extension of the outlet tubes. The canned tubes are guided around the cracked gas cooler in one step (two 90 ° bends) before entering the radiation zone. This enables a particularly advantageous vertical arrangement of the cracked gas coolers.

Mit besonderem Vorteil sind die Spaltrohre über Rohrsammelstücke jeweils in ein Spaltrohr mit vergleichsweise vergrößertem Durchmesser vereinigt. Dadurch wird der Druckverlust in den Spaltrohren klein gehalten.It is particularly advantageous for the canned tubes to be combined into a canned tube with a comparatively enlarged diameter by means of tube collecting pieces. As a result, the pressure loss in the can is kept small.

Die Erfindung wird im folgenden anhand eines Ausführungsbeispieles näher erläutert.The invention is explained in more detail below using an exemplary embodiment.

Hierbei zeigt:

Figur 2:
die Anordnung der Spaltrohre eines erfindungsgemäßen Pyrolyseofens.
Here shows:
Figure 2:
the arrangement of the can of a pyrolysis furnace according to the invention.

In Figur 2 ist eine Spaltrohranordnung eines erfindungsgemäßen Pyrolyseofens dargestellt, der die Erfindung in Abwandlung der herkömmlichen Spaltrohranordnung aus Figur 1 nach dem Stand der Technik verdeutlicht. In Figur 2 sind ebenfalls drei Gruppen von Spaltrohren A, B und C aufgezeigt. Die zu spaltenden Kohlenwasserstoffe werden entsprechend der Pfeilrichtung von
oben in die Rohre eingeleitet. Die drei Gruppen der Spaltrohre sind stufenförmig versetzt (zwei 90°-Krümmungen) um drei nicht dargestellte Spaltgaskühler angeordnet, bevor sie in die Strahlungszone des Pyrolyseofens hineinlaufen. Die Spaltgaskühler befinden sich in Verlängerung der drei Auslaßrohre (in Z-Richtung weisende Pfeile). Die gestrichelte Linie symbolisiert das obere Ende der Strahlungszone des Pyrolyseofens. Gerade, vertikal (Z-Richtung) angeordnete Rohrstücke der Spaltrohre reichen bis zum unteren Bereich der Strahlungszone. Dort sind jeweils zwei Spaltrohre über ein Rohrsammelstück zu einem Rohr vereinigt. Die resultierenden acht Spaltrohre pro Gruppe gehen in acht Rohrkrümmer über, von denen jeweils vier eine in etwa gleiche Krümmungsrichtung aufweisen. Eine gewisse Abweichung in der Krümmungsrichtung ist durch die Auskragungen der Rohrkrümmer bedingt. Die Anordnung der Rohrkrümmer ermöglicht, daß die von unten nach oben durchströmten acht geraden Rohrstücke jeder Gruppe, in die die Rohrkrümmer münden, in der Anordnungsebene der Spaltrohre zwischen den von oben nach unten durchströmten geraden Rohrstücken liegen. Die geraden Rohrstücke der Gruppen liegen in der Anordnungsebene der Spaltrohre (X/Z-Ebene). Die acht von unten nach oben durchströmten, geraden Rohrstücke jeder Gruppe werden über Rohrsammelstücke zunächst zu zwei Spaltrohren und über ein weiteres Rohrsammelstück zu einem Auslaßrohr vereinigt. Über den drei Auslaßrohren befinden sich die nicht dargstellten Spaltgaskühler in gerader Verlängerung der Auslaßrohre.FIG. 2 shows a canned tube arrangement of a pyrolysis furnace according to the invention, which illustrates the invention in a modification of the conventional canned tube arrangement from FIG. 1 according to the prior art. In Figure 2, three groups of canned tubes A, B and C are also shown. The hydrocarbons to be split are shown in the direction of the arrow
introduced into the pipes at the top. The three groups of canned tubes are staggered (two 90 ° bends) around three cracked gas coolers (not shown) before they run into the radiation zone of the pyrolysis furnace. The cracked gas coolers are located in the extension of the three outlet pipes (arrows pointing in the Z direction). The dashed line symbolizes the upper end of the radiation zone of the pyrolysis furnace. Straight, vertical (Z-direction) pipe sections of the canned tubes extend to the lower area of the radiation zone. There, two canned tubes are combined to form a tube via a tube collecting piece. The resulting eight canned tubes per group merge into eight elbows, four of which each have approximately the same direction of curvature. A certain deviation in the direction of curvature is caused by the protrusions of the elbows. The arrangement of the pipe elbows enables the eight straight pipe sections of each group, into which the pipe elbows open, to flow from bottom to top, to lie in the plane of arrangement of the can between the straight pipe sections flowing from top to bottom. The straight pipe sections of the groups lie in the arrangement level of the can (X / Z plane). The eight straight pipe sections of each group, through which flow flows from bottom to top, are first combined into two split pipes via pipe collectors and into an outlet pipe via a further pipe collector piece. Above the three outlet pipes are the cracked gas coolers, not shown, in a straight extension of the outlet pipes.

Claims (3)

Pyrolyseofen zum thermischen Spalten von Kohlenwasserstoffen mit einer Strahlungszone, darin eingebauten Brennern und Spaltrohren, wobei die Spaltrohre in der Strahlungszone aus parallel angeordneten, vertikal verlaufenden geraden Rohrstücken und diese verbindende, im unteren Bereich der Strahlungszone befindlichen Rohrkrümmern bestehen, wobei jeweils zumindest vier Spaltrohre zu gleichartig in der Strahlungszone angeordneten Gruppen zusammengefaßt sind, wobei die Spaltrohre einer Gruppe im unteren und oberen Bereich der Strahlungszone über Rohrsammelstücke jeweils in einem Austrittsrohr vereinigt sind, wobei die geraden Rohrstücke und die Rohrsammelstücke der einzelnen Gruppen in Querrichtung des Pyrolyseofens einreihig, d.h. in einer Ebene, angeordnet sind, dadurch gekennzeichnet, daß die Rohrstücke einer Gruppe am Eintritt in die Strahlungszone jeweils zur Hälfte rechts- und linksseitig um das Austrittsrohr der Gruppe angeordnet sind und daß die Rohrkrümmer der einen Hälfte der Gruppe in die entgegengesetzte Richtung weisend wie die Rohrkrümmer der zweiten Hälfte der Gruppe angebracht sind.Pyrolysis furnace for the thermal splitting of hydrocarbons with a radiation zone, burners and cracking tubes built into it, the cracking tubes in the radiation zone consisting of parallel, vertically extending straight pipe sections and connecting pipe elbows located in the lower region of the radiation zone, with at least four cracking tubes each being of the same type Groups arranged in the radiation zone are combined, the split tubes of a group in the lower and upper region of the radiation zone being combined in an outlet tube via tube collecting pieces, the straight tube pieces and the tube collecting pieces of the individual groups being arranged in one row in the transverse direction of the pyrolysis furnace, ie in one plane, are arranged, characterized in that the tube pieces of a group at the entrance to the radiation zone are arranged on the right and left side half around the outlet tube of the group and that the pipe elbows of one half of the group pointing in the opposite direction as the pipe elbows of the second half of the group are attached. Pyrolyseofen nach Anspruch 1, dadurch gekennzeichnet, daß die Spaltrohre vor dem Eintritt in die Strahlungszone stufenförmig versetzt angeordnet sind und sich über jedem Austrittsrohr einer Gruppe außerhalb der Strahlungszone ein Spaltgaskühler in gerader Verlängerung der Auslaßrohre befindet.Pyrolysis furnace according to claim 1, characterized in that the canned tubes are staggered in steps before entering the radiation zone and a cracked gas cooler is located in a straight extension of the outlet tubes above each outlet tube of a group outside the radiation zone. Pyrolyseofen nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß Spaltrohre über Rohrsammelstücke jeweils in ein Spaltrohr mit vergleichsweise vergrößertem Durchmesser vereinigt sind.Pyrolysis furnace according to one of claims 1 or 2, characterized in that canned tubes are each combined in a canned tube with a comparatively enlarged diameter via tube collecting pieces.
EP92113909A 1991-08-28 1992-08-14 Pyrolysis furnace for the thermal cracking of hydrocarbons Expired - Lifetime EP0529441B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4128521A DE4128521A1 (en) 1991-08-28 1991-08-28 PYROLYSIS OVEN FOR THERMAL CLEANING OF HYDROCARBONS
DE4128521 1991-08-28

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EP0529441A1 true EP0529441A1 (en) 1993-03-03
EP0529441B1 EP0529441B1 (en) 1995-05-03

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EP (1) EP0529441B1 (en)
DE (2) DE4128521A1 (en)
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ES2073218T3 (en) 1995-08-01
DE4128521A1 (en) 1993-03-04
US5271809A (en) 1993-12-21
DE59202073D1 (en) 1995-06-08

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