WO2017016671A1 - Tank with a leak-proof tank floor - Google Patents

Abstract

The invention relates to a tank 1 for storing a fluid, having a lateral surface 10, which encloses an interior 11 of the tank 1 for accommodating the fluid, and having a double floor 20 which is connected to the lateral surface 10, has an interspace 21 and delimits the interior 11 of the tank 1 in the downward direction. The invention makes provision for the floor 20 to have an annular peripheral panel 200, which bears the lateral surface 10, and also an upper floor panel 201 and a lower floor panel 202, wherein the two floor panels 201, 202 are connected to the peripheral panel 200 to form the interspace 21.

Description

 description

TANK WITH AN OUTLET SAFE TANK SOIL

The invention relates to a tank for storing a fluid. Such tanks usually have a jacket which surrounds an interior of the tank for receiving the fluid, as well as a floor connected to the jacket, in particular

 Double bottom, which has a gap, and the interior of the tank is limited to the bottom.

Such a tank is e.g. from DE102004002217A1 and from DE 102 34 190 A1.

Proceeding from this, the present invention has the object to provide a tank which is simple in construction, tolerates relatively high loads and in particular is easy to check for leakage on the bottom side.

This problem is solved by a tank having the features of claim 1. Advantageous embodiments of the inventive tank are in the

Subclaims and are described below. According to claim 1, the invention provides that the bottom of a

annular, the shell-bearing edge plate has, as well as an upper bottom plate. and a lower floor panel, wherein the two floor panels are connected to the edge panel so that the gap is formed. The floor is thus preferably a raised floor which has the intermediate space as a cavity. Preferably, furthermore, the two floor panels are each welded directly to the edge panel (see also below). Furthermore, preferably, the encircling, preferably cylindrical jacket on an end face, which is welded to an upper side of the edge plate. In this case, the end face preferably forms a T-joint (also called web joint) with the upper side of the edge plate and is preferably welded thereto by means of a double fillet weld (for example a double HY seam) or a fully welded-through seam. Furthermore, it is preferably provided that the upper base plate with a

circumferential edge region rests on the top of the edge plate and is welded to the top of the edge plate. Preferably, the lower bottom plate is welded to the edge plate.

The edge plate and the two bottom plates and the shell of the tank are preferably made of one of the following materials: steel, aluminum or a fiber composite material. The edge plate and the two bottom plates are preferably made of the same or a similar material.

About the edge plate so the loads of the tank shell can be added, the edge plate also equal to a circumferential side wall of the gap forms, which is bounded above and below by the first and the second bottom plate.

The massive edge plate further contributes to an increased tightness, since leaks due to corrosion are virtually excluded by their thickness.

Leakages due to weld defects can be corrected by checking the

corresponding welds of the edge plate (also referred to as bottom edge plate) are detected by X-rays or ultrasound. The two

 Bottom plates, each forming a full tank bottom in particular, may be separately tested for leaks (e.g., by applying a vacuum).

The solution according to the invention particularly advantageously permits a simple structural design of the double bottom, in which e.g. no additional angles, profiles etc. are necessary. It is also the representation of a complete second floor according to the rules applicable in tank construction possible.

According to a preferred embodiment, the edge plate, which is also known as

Bottom edge sheet is called, designed and intended to absorb the entire load of the shell and in particular to initiate a foundation of the tank.

According to a preferred embodiment of the invention, the foundation may have a thermal insulation on which the edge plate flies. Relative to a properly arranged, operational tank, the annular edge plate extends along the horizontal and the jacket is

Preferably arranged concentrically to the edge plate on this and preferably extends along a vertical longitudinal or cylindrical axis. The two bottom plates preferably extended parallel to the edge plate along the

Horizontal. In this case, the upper base plate is preferably arranged in the direction of the longitudinal axis above the lower base plate and lies in the said

Direction opposite. Preferably, the edge plate rotates in a horizontally lying

 Circumferential direction, wherein the edge plate preferably has a rectangular cross-section perpendicular to the circumferential direction.

As already stated, the upper base plate is preferably welded to the edge plate. Preferably, it is provided that the upper base plate flies with a peripheral edge region on an upper side of the edge plate and is welded to the upper side of the edge plate. Thus, the upper bottom plate forms an overlap joint with the edge plate, wherein a circumferential end face of the upper base plate, which runs in particular along a normal to the upper side of the edge plate or perpendicular to the upper side, is welded to the upper side via a front fillet weld.

As already stated, furthermore, the lower base plate is welded to the edge plate. In this case, it is preferably provided that a peripheral end face of the lower base plate is welded to an inner side of the edge plate facing the intermediate space, wherein that inner side preferably extends along the longitudinal axis. Preferably, the end face of the bottom bottom plate forms a butt joint with the inside of the edge plate and is preferably welded to the inside of the edge plate via a butt weld (for example a HV seam).

According to one embodiment of the invention it is further provided that the annular edge plate has at least one channel which extends in the edge plate, and over which the gap of the double bottom is in flow communication with an opening of the edge plate, which is arranged outside of the inner space on an outer side of the edge plate is, for example, at the top of the edge plate. As a result, with advantage critical wall or jacket bushings above the jacket -bzw. Floor weld (for example, the double fillet above) omitted. Furthermore, critical pipe connections to the two bottom plates, which are required in conventional systems, can advantageously be dispensed with.

According to one embodiment of the invention it is provided that the at least one channel is formed by at least one bore or recess, e.g. runs in the horizontal and in particular radial direction through the edge plate.

According to a further embodiment it is provided that the at least one channel is formed by two bores or recesses extending at an angle to each other, e.g. the opening is formed on the top of the edge plate. In this case, a bore or recess in the horizontal, in particular radial, direction extending from the intermediate space to the outside, with a further perpendicular to the top of the edge plate extending bore or recess, starting from said opening abuts the horizontal bore or recess.

Furthermore, according to one embodiment of the invention, it is provided that the intermediate space of the double bottom via the channel and the opening with a

 Leakage detector is in flow communication or is configured to be brought into flow communication via the opening with such a detector. Here, the port may be in fluid communication with the leakage detector via a conduit (e.g., piping). The leakage detector is preferably configured to provide a leakage fluid, i. Fluid, e.g. has passed through the upper base plate or past this in the intermediate space to detect, in particular by means of a measurement of the pressure in the intermediate space (also referred to as leakage space). Other leakage detectors are also conceivable. Furthermore, according to one embodiment, the tank has one at the periphery of

Edge plate (outside of the interior) surrounding cover, the

to protect the foundation (especially the thermal insulation) from aggressive media. In this case, the cover has an inner edge region, which has an outer edge

Edge region of the top of the edge plate overlaps, outside the interior or shell of the tank runs. The cover is arranged so that it covers at least the foundation. That is, an outer edge portion of the cover extends at least to an outer foundation boundary or beyond. According to a further embodiment of the invention, it is provided that the tank has a spacer means which is arranged between the two base plates in order to ensure a minimum distance between the two base plates.

Further features and advantages of the invention are intended in the following

Figure description of embodiments of the invention will be explained with reference to the figures. It shows:

Fig. 1 is a schematic fragmentary view of an inventive

 Tanks.

Fig. 1 shows a tank 1 for storing a fluid. The tank 1 can be used in particular as a high-temperature tank and fluids in the temperature range of e.g. -196 ° C to + 700 ° C save. In particular, the tank 1 can be used to store a molten salt.

The tank 1 has a cylindrical jacket 10 which extends along a vertical longitudinal axis or cylinder axis. The jacket 0 surrounds one

Interior 11, which serves to receive the fluid. At the bottom, the tank 1 is closed by a double bottom 20, which has a gap 21. The bottom 20 further comprises a shell-bearing, annular edge plate 200, which is also referred to as a bottom edge plate, and an upper bottom plate 201 and a lower bottom plate 202, both of which are welded directly to the edge plate 200, so that the gap 21 created which is bounded at the top by the upper edge plate 201 and at the bottom by the lower edge plate 202. Toward the sides, that is to say in the radial direction, the intermediate space 21 is delimited by the circumferential, annular edge plate 200, which preferably has a

Has rectangular cross-section, in particular, the extension of the cross section in the radial direction is greater than in the direction of the longitudinal or

Cylinder axis of the tank 1. The edge plate 200 and the lower base plate 202 are also formed flush with each other and lie on an insulation 31 and on a foundation 30 of the tank 1. Here, the insulation 31 protrudes in the radial direction beyond the edge plate 200, which rests with a bottom 203 b on the heat insulation 31. The jacket 10 further has an end face 12 which rotates in the horizontal plane and faces an upper side 203 of the edge plate 200 and is welded directly thereto via a double fillet seam 90, 91, one fillet weld 91 in the inner space 11 and the other fillet weld 90 circulating on an outer side of the jacket 10, which faces away from the inner space 11. The two fillet welds 90, 91 can be welded through, ie, be connected to each other or meet.

Furthermore, the upper bottom plate 201 rests with a peripheral edge region 204 on the upper side 203 of the edge plate 200 and forms one with it

Lap joint. Here, a circumferential end face 208 of the upper bottom plate 201, in the radial direction of the jacket 10 and the inner fillet weld 91st

opposite, welded via a Stirnkehlnaht 93 directly to the top 203 of the edge plate 200. In this case, the upper bottom plate 201 covers a central opening 21 of the annular edge plate 200 and the intermediate space 21 of the double bottom 20. Towards the bottom, this opening 21 or the intermediate space 21 is closed by the bottom bottom plate 202 fitted flush into the opening 21.

The lower base plate 202 forms a butt joint with an inner side 206 of the edge plate 200 facing the intermediate space 21 or the opening 21 and is welded directly thereto via a butt weld 94.

For monitoring the leakage of the gap 21 it is provided that the edge plate 200 has a formed in the edge plate 200 channel 40, starting from the gap 21 in the horizontal (in particular radial) direction in the form of a blind bore 42 extends to the outside, in which a further, vertical blind hole 43, which extends from an opening 41, which is formed outside the inner space 11 at the upper side 203 of the edge plate 200, to the horizontal bore 42. The opening 41 is connected via a suitable flow connection 80 (eg in the form of a pipeline) to a leakage detector 50, which is designed to detect a leakage fluid in the intermediate space 21. To protect the foundation 30 and the insulation 31, the tank 1 further comprises a peripheral edge of the peripheral plate 200 encircling cover 60, wherein an inner, peripheral edge portion 61 of the cover 60 is fixed to the top 203 of the edge plate 200, and wherein a radial further outward, outer peripheral edge portion 62 of the cover 60 protrudes beyond the insulation 30 and covers it for protection against aggressive media. The outer edge region 62 of the cover 60 may be fixed to a surrounding surface of the tank 1.

LIST OF REFERENCE NUMBERS

 1 tank

 10 coat

 11 interior

 12 front side of the jacket

 0 ground

 1 space

 0 foundation

 1 heat insulation

 0 channel

 1 opening

 2, 43 bore

 0 leakage detector

 0 cover

 1 inner border area

 2 Outer edge area

 0 distance means

 0 line

 1-94 welds

 00 edge plate

 01 upper base plate

 02 Lower base plate

 03 top of the edge plate

 03b underside of the edge plate

04 Inner edge area of the upper side 05 Front side of the lower base plate06 Inside of the edge plate

07 Outer edge area of the upper side08 Front side of the upper floor plate09 Inner edge area of the upper side

Claims

claims 1. Tank for storing a fluid, with:  a jacket (10) which surrounds an interior space (11) of the tank (1) for receiving the fluid, and a false floor (20) which is connected to the jacket (10) and has an intermediate space (21) and the interior space (11) the tank (1) is bounded at the bottom, wherein the bottom (20) has an annular edge plate (200) supporting the jacket (10), an upper floor panel (201) and a lower floor panel (202), the two floor panels (201, 202) are connected to the edge plate (200), so that the intermediate space (21) is formed, characterized in that the casing (10) has an end face (12) which is connected to an upper side (203) of the edge plate (20). 200) is welded, wherein the upper bottom plate (201) with a peripheral edge region (204) rests on the upper side (203) of the edge plate (200) and with the top (203) of the edge plate (200) is welded, and wherein the lower Bottom plate (202) with the edge plate (200) is welded. Tank according to claim 1, characterized in that the edge plate (200) is arranged and provided to initiate the entire load of the jacket (10) in a foundation (30) of the tank (1). Tank according to claim 2, characterized in that the foundation (30) has a thermal insulation (31). 4. Tank according to one of the preceding claims, characterized in that a peripheral end face (205) of the lower bottom plate (202) with an intermediate space (21) facing the inside (206) of the edge plate (200) is welded. Tank according to one of the preceding claims, characterized in that the edge plate (200) has at least one channel (40) over which the intermediate space (20) is in fluid communication with an opening (41) of the Edge plate (200) is located outside of the inner space (1 1) on an outer side (203) of the edge plate (200) is arranged. 6. Tank according to claim 5, characterized in that the at least one channel (40) is formed by at least one bore (42). 7. Tank according to claim 5 or 6, characterized in that the at least one channel (40) by two angularly extending bores (42, 43) is formed. 8. Tank according to one of claims 5 to 7, characterized in that the intermediate space (20) via the channel (40) and the opening (41) with a  Leakage detector (50) is in flow communication, which is configured to detect a leakage fluid in the intermediate space (21). 9. Tank according to one of the preceding claims, characterized in that the tank (1) on the periphery of the edge plate (200) encircling cover (60), in particular for the protection of the foundation (30) from aggressive media. Tank according to claim 9, characterized in that the cover (60) has an inner edge region (61) which covers an outer edge region (207) of the upper side (203) of the edge plate (200), and wherein the cover (60) is arranged so that it covers at least the foundation (30). 1 tank according to one of the preceding claims, characterized in that the tank (1) has a Distanzmiftel (70) which is arranged between the two bottom plates (201, 202).