Indian Patents. 269899:DEVICE FOR POSITIONING AND FIXING WIRES IN TUBES.

Title of Invention	DEVICE FOR POSITIONING AND FIXING WIRES IN TUBES.
Abstract	The invention relates to a device for fixing and positioning in tubes and to be use thereof for tubular reactors.

Full Text	Device for positioning and fixing wires in tubes The invention relates to a device for positioning and fixing solid or hollow wires in tubes. In chemical reaction technology, the positioning and fixing of wires, in particular thermocouples, in tubular reactors is of great significance. It is intended to be possible to measure the temperature at various points over the entire length of the tubes. In this context, the term hollow wires also includes capillaries through which gaseous or liquid educts are introduced at a desired height into the reaction tube. These capillaries may likewise be provided as an enclosure for thermocouples which one wishes to position in the region between the holders. The capillaries can also be used for sampling during the reaction and removing the desired samples by suction. In this case, it is undesired for the positioning to necessitate drilling into the wall of the tube, which would make the effort involved in production increase to an impractical level, in particular for shell-and- tube reactors which have several thousand tubes. Feed inlets of this type would adversely influence the catalyst pellet fill, allowing channelling and inhomogeneous dynamic pressure distributions to occur. The object of the invention is to provide a device with which these disadvantages are avoided. The invention relates to a device for positioning and fixing solid and hollow wires in tubes (later also referred to as holders), comprising a non-closed annular element, which has a smaller cross section than these tubes, the wall of which has at least one bore for leading through a wire, in particular a thermocouple, and in which there is a continuous slot, preferably parallel to the extent of the tube. By expansion or compression, the diameter of the device can be adapted to that of the tube, so that it is in close contact with the wall. Depending on the dimensions of the device, it contains one or more bores for leading through wires, such as thermocouples or capillaries. Its length inside the annular device and perpendicular to the direction of the tube preferably corresponds to half the diameter of the tube, so that the temperature measurement takes place in the middle of the latter. However, other dimensions are also possible. The wires are preferably fastened to the lead-throughs by soldered joints and are led to the end of the tube on its wall, possibly clustered together. They may also be fixed on the wall inside the tube. In general, a reactor tube contains a number of these holders at suitable distances from one another, in order for example to observe the temperature profile in the tube. The configuration according to the invention has the effect of reducing the otherwise observed tendency for packings with which the tubes are generally filled, of solid material, for example catalysts, to undergo channelling when a flow passes through them. Use of the device according to the invention is not restricted to a specific type of tube or the material used for it. Tubes made of commercially available steels, such as are used for example in chemical plant construction, which have an inside tube diameter of 10 to 75 mm, are suitable. Tubes with an inside tube diameter of 15 to 50 mm are especially suitable. Tubes with an inside tube diameter of 15 to 3 0 mm are suitable in particular. The material for the devices according to the invention is also not restricted to a specific type of wire or material. All commercially available wires are suitable; wires which are used for example in a known way as thermocouples for measuring temperatures are suitable in particular. The diameter of these solid or hollow wires may be up to 3 mm. Wires with a diameter of up to 2 mm are especially suitable. The length of the wires is not limited and is adapted to the length of the tubes. Wires with a length of up to 20 metres are especially suitable. Up to 20 wires may be led out of a tube (Figure 1; n=18) . However, it is expedient to lead up to 12 wires (n=10) out of the tube, especially preferred to lead out up to 6 wires (n=4). The fastening device preferably has the form of a non- closed annularly bent rectangle, the corners of which are preferably rounded or bevelled. The distance between the sides of the rectangle facing towards one another amounts to 1 to 10 mm, in particular 3 to 8 mm, depending on the diameter of the tube. The height of the rectangle generally amounts to 15 to 8 0 mm, in particular 2 0 to 40 mm, depending on the diameter of the tube. The devices according to the invention are preferably drawn into the tube by means of wire pulls, the pulling wire subsequently being released and removed from the tube. The devices are no longer displaced on account of the clamping action on the tube wall without being subjected to force. The device is especially suitable for fixed-bed reactors in which liquid-phase or gas-phase reactions are carried out. Description of the figure Figure 1: A: Cross section of the tube (Y-Z direction) B: Longitudinal section of the tube (X direction) C1 to C3: Embodiments of the positioning elements n: Number of wires introduced Patent claims 1. Device for positioning and fixing solid and hollow wires in tubes, preferably filled with packing of solid material, comprising a non-closed annular element, which has a smaller cross section than these tubes, the wall of which has at least one bore for leading through a wire, and in which there is a continuous slot, preferably parallel to the extent of the tube. 2. Device according to Claim 1, characterized in that the wire is led through the bore perpendicularly in relation to the direction of the tube to the middle of the tube. 3. Device according to Claim 1, characterized in that the device has the form of a non-closed annularly bent rectangle, the corners of which are rounded or bevelled. 4. Device according to Claims 1 and 2, characterized in that the wire is a thermocouple. 5. Use of devices according to Claim 1 for positioning and fixing a thermocouple in a tubular reactor. 6. Use of devices according to Claim 1 for positioning a capillary in a tubular reactor. ABSTRACT The invention relates to a device for fixing and positioning in tubes and to be use thereof for tubular reactors.

Full Text

Device for positioning and fixing wires in tubes
The invention relates to a device for positioning and
fixing solid or hollow wires in tubes.
In chemical reaction technology, the positioning and
fixing of wires, in particular thermocouples, in
tubular reactors is of great significance. It is
intended to be possible to measure the temperature at
various points over the entire length of the tubes.
In this context, the term hollow wires also includes
capillaries through which gaseous or liquid educts are
introduced at a desired height into the reaction tube.
These capillaries may likewise be provided as an
enclosure for thermocouples which one wishes to
position in the region between the holders. The
capillaries can also be used for sampling during the
reaction and removing the desired samples by suction.
In this case, it is undesired for the positioning to
necessitate drilling into the wall of the tube, which
would make the effort involved in production increase
to an impractical level, in particular for shell-and-
tube reactors which have several thousand tubes. Feed
inlets of this type would adversely influence the
catalyst pellet fill, allowing channelling and
inhomogeneous dynamic pressure distributions to occur.
The object of the invention is to provide a device with
which these disadvantages are avoided.
The invention relates to a device for positioning and
fixing solid and hollow wires in tubes (later also
referred to as holders), comprising a non-closed
annular element, which has a smaller cross section than
these tubes, the wall of which has at least one bore
for leading through a wire, in particular a

thermocouple, and in which there is a continuous slot,
preferably parallel to the extent of the tube.
By expansion or compression, the diameter of the device
can be adapted to that of the tube, so that it is in
close contact with the wall.
Depending on the dimensions of the device, it contains
one or more bores for leading through wires, such as
thermocouples or capillaries.
Its length inside the annular device and perpendicular
to the direction of the tube preferably corresponds to
half the diameter of the tube, so that the temperature
measurement takes place in the middle of the latter.
However, other dimensions are also possible. The wires
are preferably fastened to the lead-throughs by
soldered joints and are led to the end of the tube on
its wall, possibly clustered together. They may also be
fixed on the wall inside the tube.
In general, a reactor tube contains a number of these
holders at suitable distances from one another, in
order for example to observe the temperature profile in
the tube.
The configuration according to the invention has the
effect of reducing the otherwise observed tendency for
packings with which the tubes are generally filled, of
solid material, for example catalysts, to undergo
channelling when a flow passes through them.
Use of the device according to the invention is not
restricted to a specific type of tube or the material
used for it. Tubes made of commercially available
steels, such as are used for example in chemical plant
construction, which have an inside tube diameter of 10
to 75 mm, are suitable. Tubes with an inside tube

diameter of 15 to 50 mm are especially suitable. Tubes
with an inside tube diameter of 15 to 3 0 mm are
suitable in particular.
The material for the devices according to the invention
is also not restricted to a specific type of wire or
material. All commercially available wires are
suitable; wires which are used for example in a known
way as thermocouples for measuring temperatures are
suitable in particular. The diameter of these solid or
hollow wires may be up to 3 mm. Wires with a diameter
of up to 2 mm are especially suitable.
The length of the wires is not limited and is adapted
to the length of the tubes. Wires with a length of up
to 20 metres are especially suitable.
Up to 20 wires may be led out of a tube (Figure 1;
n=18) . However, it is expedient to lead up to 12 wires
(n=10) out of the tube, especially preferred to lead
out up to 6 wires (n=4).
The fastening device preferably has the form of a non-
closed annularly bent rectangle, the corners of which
are preferably rounded or bevelled.
The distance between the sides of the rectangle facing
towards one another amounts to 1 to 10 mm, in
particular 3 to 8 mm, depending on the diameter of the
tube.
The height of the rectangle generally amounts to 15 to
8 0 mm, in particular 2 0 to 40 mm, depending on the
diameter of the tube.
The devices according to the invention are preferably
drawn into the tube by means of wire pulls, the pulling
wire subsequently being released and removed from the
tube. The devices are no longer displaced on account of

the clamping action on the tube wall without being
subjected to force.
The device is especially suitable for fixed-bed
reactors in which liquid-phase or gas-phase reactions
are carried out.

Description of the figure
Figure 1:
A: Cross section of the tube (Y-Z
direction)
B: Longitudinal section of the tube
(X direction)
C1 to C3: Embodiments of the positioning elements
n: Number of wires introduced

Patent claims
1. Device for positioning and fixing solid and hollow
wires in tubes, preferably filled with packing of
solid material, comprising a non-closed annular
element, which has a smaller cross section than
these tubes, the wall of which has at least one
bore for leading through a wire, and in which there
is a continuous slot, preferably parallel to the
extent of the tube.
2. Device according to Claim 1, characterized in that
the wire is led through the bore perpendicularly in
relation to the direction of the tube to the middle
of the tube.
3. Device according to Claim 1, characterized in that
the device has the form of a non-closed annularly
bent rectangle, the corners of which are rounded or
bevelled.
4. Device according to Claims 1 and 2, characterized
in that the wire is a thermocouple.
5. Use of devices according to Claim 1 for positioning
and fixing a thermocouple in a tubular reactor.
6. Use of devices according to Claim 1 for positioning
a capillary in a tubular reactor.

ABSTRACT

The invention relates to a device for fixing and positioning in tubes and to be use
thereof for tubular reactors.

Documents:

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Patent Number

269899

Indian Patent Application Number

3494/KOLNP/2006

PG Journal Number

47/2015

Publication Date

20-Nov-2015

Grant Date

17-Nov-2015

Date of Filing

23-Nov-2006

Name of Patentee

EVONIK DEGUSSA GMBH

Applicant Address

RELLINGHAUSER STRASSE 1-11,45128 ESSEN

Inventors:

#	Inventor's Name	Inventor's Address
1	Werner Burhardt	Reichenbachstrasse 9 63636 Brachttal
2	Dr.Kalus Huthmacher	Larchenweg 18 63571 Geinhausen
3	Dr.Achim Fisher	Willigisstrasse 9 63739 Ashaffenburg

PCT International Classification Number

B01J 19/00

PCT International Application Number

PCT/EP2005/007322

PCT International Filing date

2005-07-07

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	102004035890.7	2004-07-23	Germany