A receiving device for at least one tank intended for the storage of gaseous or liquid media, in particular a biogas tank

Abstract

The device for at least one tank intended for storing gaseous or liquid media, in particular a biogas tank, has a wall (1) surrounding a receiving space (4) for the tank, which is supported on a base (2). In order to construct the device at a lower cost and in an environmentally friendly manner, the base (2) is designed to extend in the shape of a ring corresponding to the contour of the wall (1). The area enclosed by the annular base is covered by at least one cover layer, preferably over a compacted base. Since the base is provided only along the circumference of the wall, this results in considerable savings in terms of material and cost. Fig. 1

Description

Title of the invention: Device for at least one tank intended for the storage of gaseous or liquid media, in particular a biogas tank

[0001] The invention relates to a device for at least one tank intended for the storage of gaseous or liquid media, in particular a biogas tank, according to the preamble of claim 1.

[0002] Particularly for biogas tanks, it is accepted to make the bottom of the receiving space from reinforced concrete. This is not only expensive but also questionable from an environmental point of view. If, for example, a biogas tank has a diameter of 36 m, the bottom will then have a surface area of ​​approximately 1,000 m2. Assuming a usual thickness of the reinforced concrete bottom of 30 cm to 35 cm, 300 m3 to 350 m3 of reinforced concrete will therefore be required.

[0003] The invention aims to design the generic device so that it can be built at low cost and in an environmentally friendly manner.

[0004] This objective is achieved by means of the generic device according to the invention with the characterizing features of claim 1.

[0005] The device according to the invention is distinguished by the fact that, in order to support the wall, the base for the wall is configured so that it extends only along the wall and is therefore designed in an annular shape. The area enclosed by the annular base remains free of reinforced concrete and is covered by at least one covering layer which preferably covers a compacted base. Since the base is provided only along the circumference of the wall, considerable savings in terms of material and cost result. The annular base is configured solely with the aim of enabling the wall to be reliably supported on the ground. The covering layer makes it possible to cover the area inside the annular base in a simple, economical and yet reliable manner. The covering layer allows deformations under corresponding loads without the risk of breakage or any other damage.

[0006] In an advantageous embodiment, the annular base is designed to protrude inwards over the wall. The covering layer can be easily laid and, if necessary, fixed onto this protruding base portion.

[0007] It is advantageous if the annular base also projects outwards over the wall. The projection of the base over the wall may only have the size necessary to ensure that the wall is perfectly supported. This ensures that only a small amount of material is required for the base.

[0008] The covering layer advantageously has a non-woven layer, which is inexpensive and can be easily applied against the wall.

[0009] In doing so, it is advantageous for the covering layer to have at least one sealing layer which ensures perfect sealing of the bottom of the tank.

[0010] Advantageously, the sealing layer is arranged on the nonwoven layer. In doing so, it is advantageous for the sealing layer to rest on the nonwoven layer and to be securely connected thereto.

[0011] A proven and inexpensive sealing layer is advantageously composed of an HDPE sheet.

[0012] A simple installation of the covering layer is advantageously possible when it rests on the part of the base projecting inwards over the wall. The covering layer can be fixed or held there depending on the use made of the device.

[0013] When the receiving space is provided with a sealing layer, this is then advantageously connected in a sealed manner to at least one wall covering with which the inner side of the wall is sealed. The sealed connection between the sealing layer and the wall covering can be achieved easily, for example by a bonding process, a welding process or the like.

[0014] It is for example possible to arrange the covering layer below a protective concrete layer, which is particularly advantageous when the tank is manufactured as a dimensionally stable tank, for example made of steel, which is inserted into the receiving space of the wall.

[0015] The covering layer may advantageously rest on a thermal insulation layer if corresponding thermal insulation properties are required.

[0016] The subject-matter of the application results not only from the subject-matter of the individual patent claims, but also from all the indications and features disclosed in the drawings and the description. Even if they are not the subject-matter of the claims, they are claimed as being essential to the invention since they are new, individually or in combination, compared to the state of the art.

[0017] Other features of the invention follow from the other claims, the description and the drawings.

[0018] The invention is explained in more detail with the aid of some embodiments shown in the drawings. Shown are:

[0019] [Fig-1] in a schematic representation, a first embodiment of a device according to the invention,

[0020] [Fig.2] in an enlarged representation, a corner area of ​​the device according to the [Fig.l] with a control tube,

[0021] [Fig.3] in a representation according to [Fig.2], a corner zone of the device according to [Fig.l] in the area outside the control tube,

[0022] [Fig.4], [Fig.5] in representations corresponding to [Fig.2] and 3, another embodiment of a device according to the invention.

[0023] The devices described below are distinguished above all by the fact that they do not require a reinforced concrete base for sealing. This not only contributes to great respect for the environment because a large quantity of reinforced concrete is saved, but also allows for lower-cost manufacturing.

[0024] [Fig.l] shows an exemplary embodiment of such a device. It has a wall 1 which rises on a base 2. The wall can have any suitable contour. Advantageously, the wall 1 is designed cylindrically and extends perpendicularly from the base 2. This is advantageously made of reinforced concrete and is provided only in the area of ​​the peripheral wall 1, so that the latter is firmly supported in the ground. The area between the wall 1 and the peripheral base 2 of the bottom is free of concrete and is formed by a preferably compacted bottom 3 which, for example, is a compacted bottom free of stones.

[0025] The wall 1 supports a storage tank (not shown), designed for example as a biogas tank, which projects into the receiving space 4 surrounded by the wall 1 and projects upwards over the wall 1.

[0026] On the compacted base 3 rests a covering layer 5 ([Fig. 2]) which is advantageously formed by a protective non-woven fabric. The covering layer 5 rests with its edge on the part of the base 2 projecting inwards over the wall 1 and is advantageously suitably fixed on the upper side thereof. The covering layer preferably extends as far as the wall 1, on the inner side of which it is applied. The covering layer 5 can also be provided so that it does not rest with its edge on the base 2 but is only arranged on the compacted base 3.

[0027] An intermediate layer 6, which is advantageously an HDPE sheet, rests on the covering layer 5. It advantageously has a small thickness only, for example 3 mm, and serves as a secondary seal. Like the covering layer 5, the intermediate layer 6 advantageously extends to the wall 1. The covering layer 5 and the intermediate layer 6 can be securely connected together in a suitable manner by being superimposed.

[0028] A sealing sheet 8 rests as primary sealing on the intermediate layer 6, with the interposition of a drainage mat 7 with a self-gripping strip. It is advantageously made of HDPE with a thickness of 3 mm for example. The sealing sheet 8 can be fixed simply and reliably using the self-gripping strips of the drainage mat 7.

[0029] The covering layer 5 and the sealing sheet 8 make it possible to obtain a perfect bottom seal economically.

[0030] The sealing film 8 is bent obliquely upwards in the outer edge region 8a and is gripped from below by the edge 9a of a wall film 9, which is lower and bent obliquely accordingly. It seals the inner side of the wall 1 and is advantageously made of HDPE, which preferably has a thickness of 2.5 mm. In the overlap region 10, the sealing films 8, 9 are connected to each other in a sealed manner, preferably welded.

[0031] Joining strips 11 are provided on the inner side of the wall 1, which are held against the wall 1 with fixing elements 12. The fixing elements 12 are cast into the wall 1 during its manufacture. The joining strips 11 are advantageously made of HDPE.

[0032] The joining strips 11 extend to the base 2 and are tightly connected to the intermediate layer 6 via an extrusion seam 13 in the corner region between the wall 1 and the base 2 ([Fig. 3]). The extrusion seam 13 extends in the circumferential direction of the wall 1 and perfectly seals the connection region between the intermediate layer 6 and the joining strips 11 or the inner side of the wall 1.

[0033] The wall sheet 9 is connected to the joining strips 11 with the interposition of a protective layer 14. The protective layer 14 is advantageously formed by a non-woven fabric with self-gripping strips by means of which a simple fixing against the joining strips 11 and a simple fixing of the wall sheet 9 is achieved. At the lower edge, the protective layer 14 has an obliquely folded section 14a, which grips the folded edge section 9a of the wall sheet 9 from below and is connected to it in a suitable manner.

[0034] In the transition region between the bottom 3 and the inner side of the wall 1, a hollow space 15 ([Fig. 2]) is provided at at least one location, which is, for example, designed in the form of a hollow groove and can be used as a test space to easily determine possible permeabilities of the seal. The hollow space 15 is located in the region below the mutually overlapping sealing sheets 8 and 9. If the connection location loses its seal, the leak will reach the hollow space 15, the seal of which can be checked from the outside. A test tube 16 ([Fig. 1] and 2), which runs transversely through the wall 1 at the height of the hollow space 15, opens, for example, into the hollow space 15.The leakage in the hollow space 15 can reach the outside via the control tube 16, so that the presence of permeability of the inner lining of the wall 1 and the bottom 3 can be easily and reliably observed.

[0035] In principle, monitoring is also possible, for example visually by means of cameras and the like, which can be mounted in the hollow space 15 and via which it can be detected from the outside whether a leak has occurred in the hollow space 15.

[0036] The hollow space 15, which extends only over a part of the circumference of the wall 1, is delimited by a perforated sheet 17 against the folded edge sections 8a, 9a of the sealing sheet 8 and the wall sheet 9. The edge sections 8a, 9a can rest on the perforated sheet 17, which is fixed in a suitable manner. The perforated sheet 17 is advantageously made of V2A steel.

[0037] The space delimited by the wall sheet 9 and the sealing sheet 8 is filled over a part of its height with a protective concrete 18. As is evident from [Fig.l], a relatively small thickness is sufficient to fulfill the protective function. The protective concrete layer 18 is just thick enough to cover the overlapping area between the edge sections 8a, 9a. The protective concrete layer 18 extends to the wall sheet 9 and rests on the sealing sheet 8. In the edge area, the protective concrete layer 18 is designed in a rounded manner. The edge section 8a of the sealing sheet 8 rests against the rounded edge of the protective concrete layer 18 and is connected to it by means of a circumferential extrusion seam 19.It advantageously fills the space between the edge of the protective concrete layer 18, the wall sheet 9 and the overlapping area 10 between the edge sheet sections 8a, 9a.

[0038] The protective concrete layer 18 is advantageously composed of a concrete with incorporated synthetic fibers.

[0039] In the area outside the hollow space 15 ([Fig. 3]), the area between the edge sections 8a, 9a, the wall 1 and the intermediate layer 6 is filled with a groove 20, which is for example made of a screed mortar. In the corner area between the wall 1 and the intermediate layer 6, the groove 20 is sealed by the extruded seal 13 against the intermediate layer 6 and the wall 1.

[0040] As can be seen from [Fig. 2], the extrusion layer 13 is designed only very thinly in the area of ​​the control tube 16.

[0041] In an embodiment corresponding to [Fig.4] and 5, a thermal insulation layer 21 is provided on the compacted bottom 3 and on the part of the base 2 projecting inwards over the wall 1, which thermal insulation layer extends to the inner side of the wall 1 and can be made of any suitable material.

[0042] The layers described in detail with the aid of [Fig.2] and 3 are provided in the same manner and in the same arrangement, with the only difference being that they are arranged not not on the base 2 and the compacted bottom 3, but rather on the thermal insulation layer 21, which covers the base 2 and the compacted bottom 3.

[0043] In this case, the control tube 16 and the hollow space 15 are at a distance from the base 2 ([Fig.4]). The internal structure of the device corresponds entirely to the previous embodiment, so that reference is made to the description given therein.

[0044] The described embodiments are distinguished by the fact that a seal is achieved without a reinforced concrete slab. It is sufficient to provide only a reinforced concrete base 2 for the wall 1, in order to support it. It projects only slightly inwards and advantageously also outwards over the wall 1, so that little material is required for the production of the base 2. Instead of the reinforced concrete slab, the compacted base 3 is used, on which the covering layer 5 is arranged. In the manner described, an excellent seal can be achieved at low cost and in particular in an environmentally friendly manner, without the previously customary reinforced concrete seal being necessary. Furthermore, the device is particularly sustainable in that the materials used can be reused.

Claims

Claims

1. Device for at least one tank for storing gaseous or liquid media, in particular a biogas tank, comprising a wall (1) surrounding a receiving space (4) for the tank, which is supported on a base (2), characterized in that the base (2) is designed to extend in the form of a ring corresponding to the contour of the wall (1), and in that the area surrounded by the annular base (2) is covered by at least one covering layer (5 to 8) which preferably covers a compacted bottom (3).

2. Device according to claim 1, characterized in that the annular base (2) projects inwards over the wall.

3. Device according to claim 1 or 2, characterized in that the annular base (2) projects outwards over the wall.

4. Device according to one of claims 1 to 3, characterized in that the covering layer (5 to 8) has a non-woven layer (5).

5. Device according to one of claims 1 to 4, characterized in that the covering layer (5 to 8) has at least one sealing layer (6, 8).

6. Device according to claim 5, characterized in that the sealing layer (6, 8) is arranged on the non-woven layer (5).

7. Device according to claim 5 or 6, characterized in that the sealing layer (6, 8) is an HDPE sheet.

8. Device according to one of claims 1 to 7, characterized in that the covering layer (5 to 8) rests on the part of the base (2) projecting inwards over the wall (1).

9. Device according to one of claims 5 to 8, characterized in that the sealing layer (6, 8) is connected in a sealed manner to at least one wall covering (9).

10. Device according to one of claims 1 to 9,

11. characterized in that the covering layer (5 to 8) rests below a protective layer of concrete (18). Device according to one of claims 1 to 10, characterized in that the covering layer (5 to 8) rests on a thermal insulation layer (21).