DE102006026497B4 - Column with elastically suspended inner jacket - Google Patents

Abstract

Column (1) for carrying out chemical processes with an inner casing (4), characterized in that the inner casing (4) is resiliently suspended with an elastic element (16) on a casing wall (3) of the column (1), wherein the elastic element (16) has an annular base body (17) and a radially inwardly projecting from the annular base body (17) second annular portion (21) which is formed by a circular groove in the elastic element (16), and from the second ring portion (21) radially inwardly at least a first arched portion (22) extends radially circumferentially having a radially encircling free inner edge (9), wherein either the inner shell (4) of the column (1) to the radially encircling free inner edge (9) welded to the first curved portion (22) or to the first curved portion (22) and to the inner free radial circumferential edge (9) of the first curved portion (22) has a second g A vaulted portion (25) which is arched oppositely to the first domed portion (22) and the inner shell (4) of the column (1) is welded to the inner free circumferential edge (26) of the second portion (25).

Description

The invention relates to a column for carrying out chemical processes, wherein the column has an inner jacket.

Columns are well-known large-scale devices for carrying out chemical processes, such. Refining of petroleum, the so-called cracking of olefins and the like. In this case, different chemical substances pass through the column, wherein in the column usually also takes place a temperature treatment and / or temperatures due to chemical reactions. Such columns are therefore usually made of stainless steels devices that resist both chemical and thermal attack.

For example, in the case of so-called C4 / C5 columns for the treatment of hydrocarbons, an inner jacket with process trays is located in the interior of the column. The inner shell is a cylinder projecting from the cylinder ends to an inner wall of the column projections, wherein the upper collar is welded to the column inner wall, while the lower collar rests against the column inner wall, but there is slidably mounted to changes in length of the inner shell Reason to compensate for thermal expansion or weight forces.

In the technical solutions known hitherto, the inner shells were fastened by means of an angle welded firmly to the body of the column.

Such an inner sheath according to the prior art is in the 5 and 6 shown. The column shown therein 100 is only in the area of the inner mantle 101 shown, the column 100 is a substantially hollow cylindrical body with built-in floors and a column jacket 102 has. On an inside 103 of the column mantle 102 is an angle 104 welded, the angle 104 ring-shaped and with a weld 105 close to the inside 103 is welded. The weld 105 runs along a free end of an angle leg 106 while the other angle leg 107 parallel to the wall 102 and spaced therefrom is arranged to extend.

In one area 108 , which corresponds to the corner of the angle, is the inner shell 101 with a circumferential free longitudinal edge 109 also close to the angle 104 welded. The circumferential free edge 109 belongs to an upper collar 110 of the inner jacket 101 with which the inner jacket 101 outwards to the wall 102 the column 100 extends. In a comparable way has the inner shell 101 at its lower end a downwardly projecting collar 111 who also turns to the wall 102 extends. Unlike the upper collar 110 is the lower collar 111 with a circumferential radial edge 112 ( 6 ) not on the wall 102 attached. In the area of the lower collar 111 are sliders 112 which on the inside 103 the wall 102 are welded and on which the free longitudinal edge 112 depending on load / temperature slides along. To the space between the inner shell 101 and the wall 102 accessible, for example for cleaning or repair work, are in the free longitudinal edge 112 cutouts 114 intended.

Furthermore, it is known that compensators are used to accommodate different coefficients of expansion and different strains (heat, force). These are roll-shaped elements that allow expansion.

However, in columns in which a passing fluid is to be directed into a narrower area, which is bounded by the inner shell, the use of compensators is not possible because the inner shell must be welded circumferentially close to the column.

The DE 11 94 825 B refers to a liner for containers that are particularly exposed to negative pressures. The lining is rigidly fastened to the container wall via bolts and fastening rings. The lining has stiffening ribs or welded stiffening rings.

From the DD 138 507 D1 is a connection for rigid floors or discs known in pressure vessels or columns. Between the pressure vessel and the bottom or the disc, a concentrically slotted tube ring is arranged. The connection should guarantee a perfect execution of reliable welds and thus an absolute tight connection.

The EP 0 514 111 A1 refers to a sealing element for floors in process columns.

In the known method, in which the inner shell is welded on the upper side with a circumferential tight welding over an angle on the inner wall of the column, it is disadvantageous that cracks are frequently to be observed in this area. These cracks arise on the one hand from the fact that the material is fatigued due to frequent strains due to heat influences, on the other hand, the inner shell accommodates different soils, so that the weight acting on the weld varies depending on the throughput or loading state of these soils and thus also acts on the weld.

The object of the invention is to improve the suspension of inner shells in columns such that the suspension is not susceptible to thermal or weight-induced failure failure.

The object is achieved with a column having the features of claim 1, advantageous developments are characterized in subclaims.

According to the invention, a column is provided for carrying out chemical processes with an inner jacket, wherein the inner jacket is resiliently suspended with an elastic element on a jacket wall of the column, the elastic element having an annular base body and a second annular section projecting radially inwardly from the annular base body (hereinafter Also referred to as a projecting part) has, which is formed by a circular groove in the elastic member, and extending radially inwardly from the second ring portion at least a first curved portion radially inwardly having a radially encircling free inner edge, wherein either the inner shell the column is welded to the radially encircling free inner edge of the first arched section, or wherein a second arched section abuts against the first arched section and the inner free radial circumferential edge of the first arched section, respectively which is curved in the opposite direction to the first curved section, and the inner jacket of the column is welded to the inner free peripheral edge of the second section.

By the first and possibly second curved or rounded portion radial expansions due to heat are readily possible. Furthermore, displacements of the inner casing downwards due to higher load in the inner casing are possible by the first and possibly second, curved or rounded region.

Preferably, the elastic element has a wide voltage applied to the jacket area, which is preferably secured to the jacket with an upper and optionally a lower weld.

The elastic element preferably has on the top side the projecting part, from which the first curved section extends downwards. From the protruding part of the first curved portion preferably extends as a relatively thin sheet metal part.

Preferably, the domed portions have a a-third circle or semicircular curvature in section.

Between the annular base body and the radially inwardly projecting second ring portion, a web is preferably formed.

In the column according to the invention the base body and the inner ring portion and the web are preferably formed integrally, wherein the base body, the web and the inner ring portion down to the curved portion and / or upwards form a semi-circular vault in section.

Preferably, the inner shell of the column has a coaxial to the column extending cylindrical portion, wherein at axial ends of the cylindrical portion depending a collar is provided, which extends radially outwardly, wherein at an upper collar or at the upper axial end, the elastic element radially is formed outwardly extending to an inner wall of the column and on a bottom, a second collar extends radially outward.

In the column according to the invention, roundish inspection openings are made in the collar or a peripheral radial edge of the collar, preferably round, at regular intervals.

The lower collar is preferably on sliders on the inside of the column wall, wherein preferably corresponding sliders are arranged on the lower collar and the sliders of the Innenkolonnenwandung and the collar are arranged slightly spaced from each other. The inner shell is thus suspended quasi resilient on the elastic element.

Preferably, the annular peripheral body, which abuts with an annular outer surface on an inner surface of the column, welded, wherein preferably an upper weld and a lower weld are present and preferably opposite to corresponding sliders of a lower collar sliders are present, wherein the sliders low spaced apart from each other.

The invention will be explained by way of example with reference to a drawing. It shows:

1 FIG. 2 is a cross-sectional view of a column having an inner jacket disposed with an element according to the invention; FIG.

2 a cross-section of the column below a lower collar of the inner jacket;

3 an enlarged sectional view of the elastic member in a first embodiment;

4 : the elastic element according to the invention in a second embodiment;

5 Fig. 3: the longitudinal section of a prior art column;

6 a cross section through the column after 5 below the lower collar of the inner jacket.

A column 1 owns a column jacket 2 , The column coat 2 is as a cylinder 2 formed, consists of a metallic, optionally coated material and has an inner jacket wall 3 , Inside the column 1 is an inner jacket 4 arranged. The inner jacket 4 has a first cylindrical section 5 which is coaxial within the jacket wall 3 the column 1 located. As the column 1 is formed vertically standing, has the cylindrical portion 5 of the inner jacket 4 an upper peripheral edge 6 and a lower peripheral edge 7 , From the upper circumferential edge 6 a collar extends 8th to the top and has a peripheral edge 9 , The collar 8th closes with the cylindrical section 5 an obtuse angle.

At the cylindrical section 5 of the inner jacket 4 are to stabilize the section 5 circumferential ribs 10 available. Depending on the length and load of the section 5 Can one or more frames 10 to be available.

From the lower circumferential edge 7 extends a second collar 11 down outside. The second collar 11 closes with the cylindrical section 5 also an obtuse angle, with the upper collar 8th with a plane perpendicular to the longitudinal axis of the column, for example, an angle of 15 ° and the lower collar with the same plane, for example, an angle of 18 °.

At a radially encircling edge 12 of the circumferential collar 11 are preferably at the periphery of the edge 12 equally distributed sliders 13 arranged. The slides 13 on the edge 12 on the inner surface 3 the jacket wall 2 the column 1 are opposite corresponding sliders 14 arranged. Preferably, the sliders 13 . 14 a small distance from each other, for example, a distance of 1 mm.

In the collar 11 or the circumferential edge 12 of the collar 11 are circumferential, preferably at regular intervals, round inspection openings 15 brought in ( 2 ).

The inner jacket 4 is with the elastic element according to the invention 16 arranged. The element 16 has a ring-like circumferential body 17 with a ring outside surface 18 on the inner jacket wall 3 is applied. The main body 17 is with an upper weld 19 and a lower weld 20 on the inner jacket wall 3 welded. From the main body 17 extends adjacent to the upper weld 19 a projecting inner ring section 21 , Between the main body 17 and the inner ring portion 21 is a jetty 21a educated. From the inner ring section 21 A bent portion extends with a defined radius 22 towards the circumferential edge 9 of the collar 8th and is at this circumferential edge 9 with a weld 23 welded. To prevent a notch effect, to achieve an improved spring action and a harmonious transition of the main body in the projecting inner ring section 21 to allow, is the bottom of the ring section with a circumferential curvature 24 at the base body 17 tethered. On the upper side, the projecting inner ring section 21 just complete with the main body.

The arched section 22 describes on average a third circle or semicircular curvature.

In a further advantageous embodiment ( 4 ) is the element of the invention 16 to a smaller diameter of the column 1 , or a larger diameter of the inner shell 4 , adapted so that, instead of a collar 8th of the inner jacket 4 , to the arched section 22 a second section 25 joins the first arched section 22 is arched opposite. The second arched section 25 ends with an edge 26 with which the section 25 , or the element 16 , to a cylinder wall 5 of the inner jacket 4 is welded. Also in this embodiment, the curved sections 22 . 25 have an average of a third circle or semicircular curvature.

The main body 17 and the projecting inner ring 21 as well as the first arched section 22 and the second arched section 25 can each with a weld 27 be connected to each other, the element 16 However, it can also be formed in one piece.

In the element according to the invention 16 It is beneficial to have movements as indicated by the arrow 28 are represented by the element 16 be made through or through the element 16 be allowed without causing cracks in the suspension of the inner shell 4 comes. In particular, movements transverse to the longitudinal axis and thermal expansions of the collar 8th by a movement of the arched section 22 on the main body 17 around the projecting inner ring 21 or the bridge 21a be performed resiliently around. Axial movements, for example by an increased load inside the inner shell 4 can be increased by increasing the radius of curvature of the arched section 22 and / or the arched section 25 allowed or intercepted.

Of course, superimposed movements of these two components can be mitmachen in the same way.

In the invention it is advantageous that by the corresponding elastic suspension of an inner shell 4 with the element according to the invention 16 a significantly increased reliability of such columns is achieved.

LIST OF REFERENCE NUMBERS

1

column

2

column jacket

3

outer wall

4

inner sheath

5

first cylindrical section

6

upper circumferential edge

7

lower circumferential edge

8th

Collar of 6

9

circumferential edge of 8th

10

ribs

11

Collar of 7

12

circumferential edge of 11

13

sliders

14

sliders

15

inspection openings

16

elastic element

17

annular circulating basic body

18

Ring outer surface

19

upper weld

20

bottom weld

21

protruding inner ring section

21a

web

22

arched section

23

Weld

24

circumferential curvature

25

second arched section

26

edge

27

welds

28

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Claims (8)

Column ( 1 ) for carrying out chemical processes with an inner jacket ( 4 ), characterized in that the inner shell ( 4 ) with an elastic element ( 16 ) on a jacket wall ( 3 ) of the column ( 1 ) is resiliently suspended, wherein the elastic element ( 16 ) an annular base body ( 17 ) and one of the annular body ( 17 ) radially inwardly projecting second ring portion ( 21 ), which by a round groove in the elastic element ( 16 ) is formed, and from the second ring section ( 21 ) radially inwardly at least a first arched portion ( 22 ) extends radially circumferentially, which has a radially encircling free inner edge ( 9 ), wherein either the inner shell ( 4 ) of the column ( 1 ) to the radially encircling free inner edge ( 9 ) of the first arched portion ( 22 ) or is attached to the first arched section ( 22 ) or to the inner free radially encircling edge ( 9 ) of the first arched portion ( 22 ) a second arched section ( 25 ) connecting the first arched section ( 22 ) is curved in opposite directions, and the inner shell ( 4 ) of the column ( 1 ) at the inner free circumferential edge ( 26 ) of the second section ( 25 ) is welded. Column ( 1 ) according to claim 1, characterized in that between the annular base body ( 17 ) and the radially inwardly projecting second ring portion ( 21 ) a footbridge ( 21a ) is trained. Column ( 1 ) according to claim 1 or 2, characterized in that the curved sections ( 22 . 25 ) have an average of a third circle or semicircular curvature. Column ( 1 ) according to one of claims 2 or 3, characterized in that the basic body ( 17 ) and the inner ring section ( 21 ) as well as the bridge ( 21a ) are integrally formed, wherein the base body ( 17 ), the footbridge ( 21a ) and the inner ring section ( 21 ) down to the domed section ( 22 ) and / or upwards form a semicircular curvature on average. Column ( 1 ) according to one of the preceding claims, characterized in that the inner shell ( 4 ) a coaxial to the column ( 1 ) extending cylindrical section ( 5 ), wherein at axial ends ( 6 . 7 ) of the cylindrical section ( 5 ) one collar each ( 8th . 11 ) is provided, which extends radially outward, wherein on an upper collar ( 8th ) or at the upper axial end ( 6 ) the elastic element ( 16 ) radially outward to an inner wall ( 3 ) of the column ( 1 ) is formed extending and at a bottom, a second collar ( 11 ) extends radially outward. Column ( 1 ) according to claim 5, characterized in that circumferentially radially outward on the lower collar ( 11 ) Sliders ( 13 ) are arranged, which of corresponding sliders ( 14 ) on an inner surface ( 3 ) of the column ( 1 ) are arranged, are slightly spaced. Column ( 1 ) according to claim 5 or 6, characterized in that in the collar ( 11 ) or a circumferential radial edge ( 12 ) of the collar ( 11 ) circumferentially, preferably at regular intervals round inspection openings ( 15 ) are introduced. Column ( 1 ) according to one of the preceding claims, characterized in that the annular circumferential body ( 17 ), which has a ring outer surface ( 18 ) on an inner surface ( 3 ) of the column ( 1 ), is welded, wherein an upper weld ( 19 ) and a lower weld ( 20 ) and with respect to corresponding sliding pieces ( 13 ) of a lower collar ( 11 ) Sliders ( 14 ) are provided, wherein the sliders ( 13 . 14 ) are slightly spaced from each other.

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