EP3585865A1

EP3585865A1 - Enclosure of an fcc unit comprising an inner support device rigidly connected to cyclones

Info

Publication number: EP3585865A1
Application number: EP18706747.5A
Authority: EP
Inventors: Romain LESAGE; Hubert Simon; Sebastien Decker
Original assignee: Total Raffinage Chimie SAS
Current assignee: TotalEnergies Onetech SAS
Priority date: 2017-02-27
Filing date: 2018-02-22
Publication date: 2020-01-01
Also published as: US10875001B2; JP2020509124A; WO2018154022A1; KR20190124738A; US20200001260A1; FR3063232A1; CN110536952A; FR3063232B1; RU2019130455A

Abstract

The invention relates to an enclosure (10) of a fluid catalytic cracking unit in which an inner space is defined by a side wall (12) having a longitudinal axis extending substantially in the direction of gravity, said enclosure being provided with a plurality of mechanical separation cyclones (14, 16) located inside the inner space. The enclosure (10) comprises a supporting device (20) attached only to the cyclones (14, 16) by: an annular peripheral support element (202) extending along the side wall (12) in a plane perpendicular to the longitudinal axis (X), separated from the side wall by a predetermined clearance; and a plurality of beams (206, 208) extending in the same plane as the peripheral support element (202), the beams being rigidly connected to the peripheral support element and to at least one mechanical separation cyclone by one end or by an attachment part distant from the ends thereof.

Description

ENCLOSURE OF AN FCC UNIT COMPRISING A SOLIDARITY INTERNAL SUPPORT DEVICE OF CYCLONES

The invention relates to an enclosure of a fluid catalytic cracking unit, in particular a regenerator chamber comprising an internal support device attached to the cyclones.

In the field of refining and in particular in the field of fluid catalytic cracking (FCC) units, it is common to have functional elements inside a chamber. Thus, in a reactor or in an FCC unit regenerator, the upper part contains cyclones for mechanical separation of particles suspended in a gaseous fluid, and possibly internal packing ("packing" in English) extending over the entire cross section of the chamber, and limiting the entrainment of catalytic particles, as described in WO2012022910.

It is therefore necessary to provide the establishment of support elements of these internal packings near mechanical separation cyclones. Such supports are generally attached to the side wall of the enclosure and must be able to be installed despite the congestion of the internal equipment of the enclosure, such as mechanical separation cyclones, possibly a central reactor, a gas pipe These supports are in fact most often attached to both the side wall of the enclosure and the internal equipment, usually cyclones.

During start-up and shutdown of the installation, differential expansion phenomena are observed between the various internal equipment of the enclosure, including the internal packing supports, and the wall of this enclosure: these supports are likely to move in different directions on the side of their attachment to the side wall of the enclosure and the side of their attachment to the internal equipment. This can lead to a loss of horizontality of the supports, which is undesirable.

Because of the relatively large size of existing equipment and differential expansion phenomena, it may be difficult to implement supports inside an enclosure, including sturdy supports. The invention aims to remedy all or part of these disadvantages by providing an enclosure of a catalytic cracking unit provided with a support device that is less sensitive to the phenomenon of differential expansion and can be installed despite reduced space available .

To this end, a first object of the invention relates to an enclosure of a fluid catalytic cracking unit, a side wall defines an internal volume having a longitudinal axis extending in the direction of gravity or substantially in the direction of the gravity, said enclosure being provided with a plurality of mechanical separation cyclones located inside the internal volume, characterized in that it comprises, inside said internal volume, a support device secured only to the separation cyclones mechanical and comprising:

a peripheral support element extending along the side wall in a plane perpendicular to the longitudinal axis, remote from the lateral wall of a predetermined set in the plane of the support element, in particular a constant clearance,

a plurality of beams extending in the same plane as the peripheral support member, the beams being secured to the peripheral support member and at least one mechanical separation cyclone by an end or a remote attachment portion of its ends.

The arrangement according to the invention thus makes it possible to produce a support device which is fixed solely to the mechanical separation cyclones. In other words, none of the beams is secured to the side wall of the enclosure. There is therefore no more differential expansion phenomenon between the support device and the wall of the enclosure on the one hand and between the support device and the cyclones on the other hand. In addition, the arrangement of the support device described allows its implementation despite the reduced available space left by the plurality of mechanical separation cyclones present in the enclosure. It should be noted that the peripheral support element may advantageously conform to the shape of the side wall of the enclosure, namely to follow the shape thereof, being separated therefrom from said predetermined clearance. Finally, an upper face of the support device defines a flat surface that can support robust way a grid disposed perpendicularly to the longitudinal axis of the enclosure.

The peripheral support member extends away from the center of the enclosure. It can especially be annular.

Advantageously, the beams can be secured to one or two mechanical separation cyclones, including adjacent cyclones, or even more cyclones.

Advantageously, for a better resistance, all the beams can be rectilinear.

The support device may further comprise other beams extending in the same plane as the peripheral support member selected from one or more of the following beams:

a beam secured to two mechanical separation cyclones, in particular adjacent, by its ends or by securing parts distant from its ends, and

a beam connecting at least two other beams together, including two.

In one embodiment, the support device may comprise several beams extending in the same plane as the peripheral support element and connecting other beams (including beams integral with one or more cyclones) while crossing each other, in particular at a single point, these beams being integral with each other at their point (s) crossing. This can facilitate the support of a grid by the support device and enhance the robustness of the support device.

In this case, beams connecting other beams can meet - be integral - at a central point of the internal volume. This can make it possible to stiffen the structure of the support device.

In another embodiment, the support device may include a central support member extending proximate a central point of the internal volume, in the same plane as the peripheral support member.

In this case, the support device may comprise beams extending in the same plane as the peripheral support element and each connecting one or two mechanical separation cyclones, in particular adjacent, to the central support element. This also makes it possible to obtain a robust structure of the support device. In this embodiment, some beams can also connect other beams together.

Alternatively or in combination, the support device may comprise beams extending in the same plane as the peripheral support member and connecting one or two mechanical separation cyclones, in particular adjacent, to the central support member and to the peripheral support element.

This embodiment is particularly advantageous when the enclosure has a tubular conduit located inside the enclosure and having a longitudinal axis parallel to the longitudinal axis of the inner side wall. The central support element can then be arranged around the tubular conduit and match the shape of this pipe being separated therefrom by a predetermined set, in particular constant, in the plane of the central support element. The central support member may then surround another internal equipment of the enclosure, such as a tubular reactor, a catalyst transfer line, a driving gas line or the like, without being in contact with it, from in order to avoid possible differential expansion phenomena.

The enclosure according to the invention may furthermore comprise one or more of the characteristics mentioned below.

At least a portion of the mechanical separation cyclones (i.e. some cyclones but not necessarily all cyclones) may have at least one support member shaped to support a beam end or a beam attachment portion.

In particular, these support members may be shaped to receive and accommodate a beam end or a beam attachment portion.

Beams may be attached to a mechanical separation cyclone at one of their ends, in particular such that a longitudinal direction of these beams passes through a central point of the separation cyclone, in the plane in which the beam extends. This can reduce the mechanical stress experienced by a cyclone supporting a beam.

Beams may extend between two mechanical separation cyclones, in particular adjacent, and be attached to one or both mechanical separation cyclones. This can help to balance mechanical stresses experienced by a beam, especially when it is located between two cyclones, and to reinforce the robustness of the support device.

The peripheral support member, and the central support member when present, may be formed of several portions defined in the plane of the support member by angular sectors whose center is a central point of the internal volume. . This may facilitate the installation of the peripheral support member, and any central support member, in the enclosure, in particular the relatively large peripheral support member. One end of a beam can then be attached to this support member between joined ends of two adjacent portions. This may make it easier to secure the beams to the support member.

Each support member (peripheral support member, central support member, or cyclone support member) may have a spaced apart top wall and a bottom wall perpendicular to the longitudinal axis, between which a beam end is fixed or a beam attachment part. The beams can thus be maintained by means of a support member made in a simple manner. These spaced upper and lower walls can in particular be in the form of crowns, in the geometric sense of the term.

Edges of the lower and upper walls of at least one support member may then be connected by a bottom wall to define a groove. The latter can then receive and house an end or a part of attachment of a beam. The support elements are made particularly simple and allow the beams to be effectively maintained. Advantageously, the peripheral support element and the central support element when present, each define grooves open towards each other, which can in particular receive fixing walls for the beams.

Each support element (in particular peripheral, central or cyclone) may have a plurality of fixing walls connecting the upper and lower walls, these fixing walls extending parallel to the longitudinal axis of the side wall of the enclosure.

Each beam may then comprise at least one plane wall parallel to the longitudinal axis of the lateral wall, applied against a wall of fixing a support element, parallel to the latter and secured to the fixing wall. This attachment can be achieved simply by fasteners such as screw-nut assemblies, pins, rivets, etc., or by welding.

The mechanical separation cyclones may be regularly distributed with respect to the longitudinal axis, in particular symmetrically. This allows a better distribution of mechanical stresses between the carrier cyclones of the support device. The beams can then also be arranged symmetrically with respect to the longitudinal axis. Advantageously, all the cyclones of the enclosure can support a beam.

A grid may be placed on an upper face of said support device, matching the shape of the side wall, the mechanical separation cyclones and the cylindrical tubular conduit located inside the enclosure when it is present, being separated from these elements of a predetermined game, especially constant, in the plane of the support element. This grid can in particular support an internal lining. Such a grid does not undergo either differential expansion phenomena between the side wall and the internal (cyclones, ....).

The enclosure according to the invention may be an enclosure of a regenerator.

The invention is now described with reference to the appended non-limiting drawings, in which:

FIG. 1 is a cross-sectional representation of a fluid catalytic cracking unit enclosure according to one embodiment of the invention;

FIG. 2 is a view in longitudinal section of the enclosure of FIG. 1 along the section line A-A,

FIG. 3 is a detail view of FIG. 1 of a peripheral support element;

FIG. 4 is a detailed view of the central support element of FIG. 1;

- Figure 5 is a sectional view along the line B-B of Figures 3 and 4;

- Figure 6 is a detailed view of the assembly of a beam on two mechanical separation cyclones; - Figures 7 and 8 are side views of an assembly of a beam to a cyclone support member according to two embodiments;

- Figure 9 is a sectional view along the line C-C of Figure 7;

FIG. 10 is a view from above of a grid supported by the support device,

- Figure 1 1 is a schematic cross-sectional representation of an enclosure according to another embodiment of the invention.

In the present description, the terms upper, lower refer to a vertical direction, in the direction of gravity, corresponding to the longitudinal direction of the chamber in its usual position of use.

By substantially horizontal, longitudinal or vertical means a direction / plane forming an angle of not more than ± 20 °, or not more than 10 ° or not more than 5 ° with a direction / a horizontal, longitudinal or vertical.

By substantially parallel, perpendicular or at a right angle is meant a direction / angle deviating by not more than ± 20 °, or not more than

10 ° or not more than 5 ° from a direction parallel, perpendicular or at a right angle.

FIG. 1 represents an enclosure 10 of a fluid catalytic cracking unit, here a regenerator enclosure. This chamber, here of cylindrical shape, has a side wall 12. The invention is however not limited to an enclosure of particular shape. This lateral wall 12 delimits an internal volume 13 having a longitudinal axis X perpendicular to the plane of FIG. 1. The enclosure 10 is provided with a plurality of mechanical separation cyclones: a series of primary cyclones 14 and a series of secondary cyclones 16.

Cyclones are used to separate the catalyst particles from the circulating gases in the unit. These are devices using centrifugal force to achieve a mechanical separation of particles suspended in a gas. The cyclones comprise an enclosure, generally substantially cylindro-conical, designed to impose a rapid rotation on the gas introduced into the body, for example by bringing the gas tangentially to the circumference of the enclosure, neighborhood of the wall. Under the effect of the centrifugal force, the solid particles taken in the vortex move towards the wall, lose their speed by friction and fall in the lower part of the apparatus, before exiting the apex of the cone. The gas follows the wall to the vicinity of the apex, and once cleared of particles, rises to the top to exit through a discharge pipe, which partially projects inside the enclosure.

A cyclone usually includes:

a separation chamber, which generally comprises a cylindrical upper part and a conical lower part,

a first inlet duct opening into the enclosure, situated in the upper part thereof,

a second gas outlet pipe located in the upper part of the enclosure, and

- A third particle outlet pipe located in the lower part of the enclosure.

In Figures 1 and 2, there are only:

for the primary cyclones 14: a portion of the cylindrical upper portion 141 of the enclosure, the conical lower portion 142 of the cyclone enclosure, and a portion of the outlet pipe of the particles 143,

for the secondary cyclones 16: the conical lower part 162 of the cyclone enclosure, and a portion of the particle outlet duct 163.

In the usual way, these cyclones 14, 16 are arranged vertically, their longitudinal axis extending substantially vertically.

The cyclones 14, 16 are thus located inside the internal volume 13, substantially in the same horizontal plane perpendicular to the longitudinal axis X. They are here regularly distributed around the longitudinal axis X, the primary cyclones 14 being alternated With the secondary cyclones 16. In the example, four primary cyclones 14 and four secondary cyclones 16 are provided. The invention is however not limited to a particular number of cyclones, nor to a particular distribution thereof.

In the embodiment shown in FIGS. 1 to 10, the different cyclones 14, 16 are arranged around a tubular pipe 18 located in the center of the enclosure 10. This pipe 18 is here a cylindrical pipe of the same longitudinal axis X as the enclosure 10.

According to the invention, the enclosure 10 has inside its volume 13 a support device 20, intended more particularly to support a grid and an internal lining.

The support device 20 comprises:

a ring-shaped peripheral support member 202 extending along the side wall 12 in a plane perpendicular to the axis of revolution X, and remote from this side wall 12 of a predetermined clearance,

a central support member 204 extending in proximity to the longitudinal axis X of the enclosure 10, here around the tubular conduit 18, in the same plane as the peripheral support element 202 (FIG. 2),

a plurality of beams, here rectilinear, 206, 208, which extend in the same plane perpendicular to the longitudinal axis X as the peripheral and central support elements, at least one end of each beam 206, 208 being fixed to the central support member 204 or the peripheral support member 202, each beam 206, 208 being attached to a mechanical separation cyclone by another end or a securing part remote from its ends.

In this example, the beams extend radially. The invention is however not limited by a particular arrangement of the beams, provided that they are connected to a cyclone, and to another element of the support device, namely in this example the peripheral support element or the central support element.

In the present application, when beams connect or are connected to elements, it is considered that this connection is rigid, that is to say that it is a fastening of the beam to the element, without the possibility of movement.

According to the invention, the support device is thus only fixed to the cyclones 14, 16 via the beams 206, 208, but is not fixed directly to the enclosure 10, in particular to its side wall 12. Thus, the elements of Peripheral and central support act as a frame for maintaining the beams and, despite the reduced available space left by the primary and secondary cyclones, the various elements of the support device 20 according to the invention can be easily set up. It will be noted that the peripheral support element 202 and the central support element 204 are respectively distant from the lateral wall 12 and the tubular reactor 18 by a predetermined clearance in the plane of these support elements. This clearance is preferably sufficiently small to prevent or limit the passage of the solid particles circulating inside the chamber, and advantageously high enough to accommodate the thermal expansion of the support device or possibly not to hang at an angle. . It may in particular be determined by those skilled in the art according to the characteristics of the solid particles and thermal expansion coefficients of the materials used.

In Figures 1-10, we can distinguish:

first beams 206 having a first end 206a attached to the peripheral support member 202 and a second end 206b attached to the central support member 204; these first beams also comprise one or two fixing portions 206c spaced apart from the first and second ends 206a, 206b respectively and fixed to one of the adjacent cyclones or to the two adjacent cyclones,

second beams 208 having a first end 208a fixed to the central support member 204 or to the peripheral support member 202 and a second end 208b attached to a cyclone 14, 16, which may be a primary or secondary cyclone.

Note that the second beams 208 extending between a primary cyclone 14 and the peripheral support member 202 are relatively short relative to each other.

In order to facilitate the installation of the support device 20 inside the enclosure 10, the peripheral support element 202 is made of a number of portions 202i defined in the plane of the support elements by angular sectors of which the center is the center of the internal volume, located here on the longitudinal axis X. These portions are thus placed end to end and assembled by their ends. Here, eight equal portions 202.1 to 202.8 are provided (see Figures 1 and 3).

The assembly between three adjacent portions 202.8, 202.1 and 202.2 is visible in FIG. 3. In the example shown, these portions 202.1 to 202.8 are assembled by screw and bolt systems but could be assembled by riveting, welding, etc. . Similarly, the central support member 204 is also formed of portions 204. i are assembled in pairs at their ends and defined in the plane by angular sectors. Here four equal portions 204.1 to 204.4 are assembled by screw and bolt systems, three of which are more clearly visible in FIG. 4.

In order to facilitate the attachment of the beams, the ends thereof fixed to the central support member 204 or to the peripheral support member 202 may be fixed between two assembled portion ends 202.i or 204.i, such as that visible in Figures 3 and 4.

In the example shown, the fixing of the beams 206, 208 on the cyclones 14, 16 is carried out by means of support members 210, which are shaped to support a second beam end 208 or a part of a first fixation. beam 206.

In general, the various support members 202, 204, 210 are shaped to support either first or second beam ends, or a first beam attachment portion. To this end, they can be arranged to receive these ends or a fixing part, and have for example a complementary shape. It can thus be provided that the support members and the beam ends or beam attachment portions cooperate in a manner similar to male / female elements.

In the remainder of the description, a particular embodiment of the fixing of the various beams to the support elements is described with reference to FIGS. 3 to 9.

In general, each support member has a spaced apart upper and lower wall perpendicular to the longitudinal axis X of the side wall 12.

The peripheral and central support members 202 thus each comprise an upper wall 212, 212 'and a bottom wall 214, 214' respectively (see FIGS. 3-5). These walls are connected by a bottom wall 216, 216 'respectively along one of their edge. For the peripheral support member 202, the bottom wall extends on the side of the side wall 12, so that the upper 212, lower 214 and bottom 216 walls define a groove (see Figure 5) whose opening is directed towards the longitudinal axis X. For the central support element 204, the bottom wall 216 'is located on the side of the tubular reactor 18, namely on the longitudinal axis X side, so that the opening of the groove is directed towards the side wall 12. The two grooves are thus open towards one another.

As regards the support elements 210 of a cyclone, they each have an upper wall 212 "and a lower wall 214", which are here directly welded to a side wall of the corresponding cyclone, here the walls 142 and 162 (see Figures 7, 8). The invention is however not limited to a particular mode of attachment of the support elements 210 to the cyclone, any other appropriate means (screwing, riveting, ...) that can be envisaged. Figures 7 and 8 show that the ends 208a of the beams are received between the upper walls 212 "and lower 214".

Each support member 202, 204, 210 further has attachment walls 218 that extend perpendicularly to the upper and lower walls and join them. These fastening walls 218 extend parallel to the longitudinal axis X. They can thus bear in abutment solid flat walls of the beams also extending parallel to the longitudinal axis X. Fasteners of the rivet type, which are bolt or others can be used for fastening.

These fixing walls 218 are particularly visible in FIGS. 3, 4, 6, 9. It will be noted that the fastening walls 218 of the peripheral and central support elements 202 extend at least partly inside the grooves, and partly outside in the example shown.

The mechanical separation cyclones 14, 16 here also present symmetrical enclosures of revolution. The fixing walls 218 of the support members 210 preferably extend radially with respect to the axis of revolution of the cyclone to which they are attached, for a better resistance to mechanical stresses.

The upper and lower walls of the different support elements 202, 204, 210 are here in the form of plane rings. In the case of the support elements 210, these crowns 212 ",

214 "are directly attached to the cyclones, the fixing walls 218 are also directly attached to the cyclones and the walls 212" and 214 ".

In the case of the peripheral support elements 202 and central 204, the upper and lower walls are interconnected by the bottom walls as well as by the fixing walls 218. Due to their respective orientations, the assembly of these different walls allows to obtain support elements 202, 204 robust although they are not attached to the side wall 12 or to the tubular conduit 18.

Each beam 206, 208 further comprises at least one plane wall parallel to the longitudinal axis X, applied against a fastening wall 218 of a support member 202, 204, 210, parallel thereto and secured to this wall of fixation.

In the example, each beam consists essentially of an elongate, straight flat strip parallel to the longitudinal axis X, the fixing portions 206c of the first beams 206 being flat walls perpendicular to the flat strip. Thus, the first beams

206 are substantially tangential to the cyclones to which they are attached, more precisely to the outer walls of these cyclones, and bear against the fastening walls 218 of the support elements 210 integral cyclones (see Figure 6).

The shape of the beams 206, 208 allows them to robustly support a grid 22 placed on their upper face (FIGS. 2 and 10), this grid 22 itself being able to support a lining element 24. The surface of the grid 22 marries Here, the contours of the cyclones 14, 16, of the tubular conduit 18 and the side wall 12 of the enclosure (fIg.10) while being separated from these elements of a predetermined game. It has for this purpose an outline similar to the shape of the side wall but of smaller dimensions, and orifices 14 ', 16', 18 'shaped to receive with a predetermined set of cyclones 14, 16 and the pipe 18 respectively.

The invention is not limited to the embodiment described.

In particular the enclosure could be devoid of central tubular conduit. The shape and the dimensions of the central support element are then no longer constrained and any other shape could be used.

In this case, it is also possible to dispense with the central support element, as shown schematically in FIG. 1. The elements identical to those previously described are designated by the same references. In this figure, the chamber 10 and primary mechanical separation cyclones 14 and secondary 16 are distinguished. FIG. 11 represents a sectional view at the level of the particle outlet ducts of the cyclones 14, 16.

In this figure, the support device 30 according to one embodiment of the invention comprises: a peripheral support member 302 extending along the side wall 12 in a plane perpendicular to the longitudinal axis X, spaced from the side wall by a predetermined clearance in the plane of the support member 302,

a plurality of beams 306, 308 extending in the same plane as the peripheral support element 302, some beams 306 connecting mechanical separation cyclones to each other, other beams 308 each connecting a mechanical separation cyclone to the peripheral support member 302.

In addition, other beams 307 connect beams 306 therebetween, these beams 307 themselves being connected to each other substantially in the center of the internal volume 13.

The beams 306, 308 are here secured to a mechanical separation cyclone at one end. The structure and the method of attachment of the beams may be similar to what has been described with reference to FIGS. 1-10. Note however that the invention is not limited to a particular shape of the beams, nor to a mode of particular attachment thereof, provided that the beams can be secured to the cyclones, the peripheral support member, optionally to a central support member and / or between them.

In addition, the arrangement of the various beams can be very variable from one enclosure to another depending on the arrangement of the cyclones between them. Thus, the invention is not limited to a particular arrangement of the beams, provided that these beams are supported by the mechanical separation cyclones.

Claims

An enclosure (10) of a fluid catalytic cracking unit having a side wall (12) defining an internal volume (13) having a longitudinal axis (X) extending substantially in the direction of gravity, said enclosure being provided with a plurality of mechanical separation cyclones (14, 16) located inside the internal volume, characterized in that it comprises, inside said internal volume, a support device (20; 30) secured only to cyclones for mechanical separation and comprising:

a peripheral support member (202; 302) extending along the side wall (12) in a plane perpendicular to the longitudinal axis (X), remote from the side wall of a predetermined clearance in the plane of the support element,

a plurality of beams (206, 208; 308) extending in the same plane as the peripheral support member (202; 302), the beams being secured to the peripheral support member and at least one cyclone of mechanical separation by an end or a remote fixing portion of its ends.

Enclosure according to claim 1, characterized in that the support device (20; 30) comprises other beams extending in the same plane as the peripheral support member (202; 302) selected from one or more the following beams:

a beam (206; 306) secured to two mechanical separation cyclones by its ends or by securing parts distant from its ends, and

a beam (307) connecting at least two other beams to each other.

Enclosure according to claim 2, characterized in that the support device (30) comprises a plurality of beams (307) extending in the same plane as the peripheral support member (302) and connecting other beams (306). ) intersecting, these beams being integral with each other at their point (s) crossing.

4. Enclosure according to one of claims 1 or 2, characterized in that the support device (20) comprises: a central support member (204) extending proximate a central point of the internal volume, in the same plane as the peripheral support member (202),

beams (206, 208) extending in the same plane as the peripheral support member and each connecting one or two mechanical separation cyclones to the central support member.

5. Enclosure according to claim 4, characterized in that the support device (20) comprises beams (208) extending in the same plane as the peripheral support element and connecting one or two mechanical separation cyclones to the central support member and the peripheral support member.

6. Enclosure (10) according to any one of claims 4 or 5, characterized in that the central support member (204) is arranged around a tubular conduit (18) located inside the enclosure , having a longitudinal axis parallel to the longitudinal axis (X) of the side wall, the central support member (204) conforming to the shape of the pipe (18) and being separated therefrom by a predetermined clearance in the plane of the central support member (204).

7. Enclosure (10) according to any one of claims 1 to 6, characterized in that at least a portion of the mechanical separation cyclones comprises at least one support member (210) shaped to support a beam end (208b ) or a beam attachment portion (206c).

8. Enclosure (10) according to claim any one of claims 1 to 7, characterized in that beams (208) are attached to a mechanical separation cyclone by one of their ends (208b) so that a direction longitudinal of these beams passes through a central point of said separation cyclone, in the plane in which the beam extends.

9. Enclosure (10) according to any one of claims 1 to

8, characterized in that the peripheral support member (202; 302), and the central support member (204) when present, is formed of a plurality of portions defined in the plane of the support member by angular sectors whose center is a central point of the internal volume and in that an end of at least one beam is fixed to this support element between assembled ends of two adjacent portions.

10. Enclosure (10) according to any one of claims 1 to 9, characterized in that each support member (202, 204, 302, 210) has an upper wall (212, 212 ', 212 ") and a wall lower (214, 214 ', 214 ") spaced, perpendicular to the longitudinal axis, between which is fixed a beam end or a beam attachment portion.

1 1. Enclosure (10) according to claim 10, characterized in that edges of the lower walls (214, 214 ') and upper (212, 212') of at least one support member are connected by a bottom wall. (216, 216 ') to define a groove.

12. Enclosure (10) according to one of claims 10 or 1 1, characterized in that each support member (202, 204, 210) has a plurality of fixing walls (218) connecting said upper and lower walls, these fixing walls (218) extending parallel to the longitudinal axis.

13. Enclosure (10) according to claim 12, characterized in that each beam comprises at least one plane wall parallel to the longitudinal axis, applied against a fixing wall (218) of a support element, parallel to that- ci and secured to this fixing wall.

14. Enclosure (10) according to any one of claims 1 to

13, characterized in that the mechanical separation cyclones (14, 16) are regularly distributed with respect to the longitudinal axis (X), in particular symmetrically.

15. Enclosure (10) according to any one of claims 1 to 14, characterized in that a grid (22) is placed on an upper face of said support device (20), said grid conforming to the shape of the side wall (12), mechanical separation cyclones (14, 16), and the tubular conduit (18) within the enclosure when present, said gate being separated from the sidewall (12), mechanical separation cyclones (14, 16), and possibly tubular conduit (18) of a predetermined clearance in the plane of the support member.

16. Enclosure (10) according to any one of claims 1 to 15, characterized in that said enclosure is an enclosure of a regenerator.