EP1728737A1 - Système de réservoirs à fond plat pour le stockage de liquides inflammables et/ou nuisibles à l'environement - Google Patents

Système de réservoirs à fond plat pour le stockage de liquides inflammables et/ou nuisibles à l'environement Download PDF

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Publication number
EP1728737A1
EP1728737A1 EP06450077A EP06450077A EP1728737A1 EP 1728737 A1 EP1728737 A1 EP 1728737A1 EP 06450077 A EP06450077 A EP 06450077A EP 06450077 A EP06450077 A EP 06450077A EP 1728737 A1 EP1728737 A1 EP 1728737A1
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EP
European Patent Office
Prior art keywords
tank
base
pressure
grains
moldings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06450077A
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German (de)
English (en)
Inventor
Per G. Federspiel
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1728737A1 publication Critical patent/EP1728737A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/48—Arrangements of indicating or measuring devices
    • B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
    • B65D90/505—Arrangements of indicating or measuring devices of leakage-indicating devices comprising porous spaces or porous layers in walls

Definitions

  • Flammable liquids present in large volumes must be stored in correspondingly large containers, tanks or the like in a manner which ensures that in the event of leakage of the container and in particular the bottom of the container from the liquids stored there nevertheless no danger to the Environment goes out.
  • this is done by double-walled execution of the shell of the container, in particular the container bottom, and by at least periodic monitoring of the cavity between the two container walls.
  • the bottoms of the tanks are usually made of steel with a thickness of 10 mm and coated with a corrosion inhibitor.
  • a corrosive attack on these soils can emanate both from the liquid medium stored in the tank and from the ground. While the corrosive attack by the stored medium can be prevented by means of a coating or post-coating, the corrosion on the underside of the bottom is uncontrolled and without the possibility of an intervention preventing or stopping the same.
  • Each revision checks the layer thickness of the welded steel plates forming the bottom and requires replacement of individual plates of insufficient material thickness.
  • Flatbed tanks usually have diameters between 20m and 80m.
  • the mass of liquids stored in the tanks is considerable and the forces acting on the bottoms of the tanks are therefore great.
  • this has the consequence that the trays or the plates forming the same are subject to great changes in the case of changes in the fill level of the tanks or, in the extreme case, if they are completely emptied or completely filled.
  • soils often rise with amplitudes up to 50 cm and more compared to the position of the soils when the tanks are fully filled.
  • Monitorable cavities so z. B. between an outer and an inner bottom of the tank, can be integrated into existing tanks only with great effort.
  • spacer fabric in particular made of glass fibers, allows the production of cavities in the coating according to the principles of fiberglass construction.
  • the spacer fabric integrated in the coating consist of two fabric cover layers, which are held at a distance from one another by the web threads connecting to one another and extending approximately perpendicularly to the cover layers.
  • the web threads of the spacer fabric - preferably one used with the trade name PARABEAM - automatically set to a respective predetermined height.
  • the DE 4322859 A1 and the US 4756033 A show line arrangements for the drainage of the bottom body of a container.
  • This membrane By filling and emptying this membrane is stretched or compressed.
  • the deformations are u. A. depends on the thickness of the floor panel. Due to the welding stresses generated by the generally overlapping welded floorboards, these deformations are difficult to predict and locally significant. It is to be expected with radii of curvature of down to one meter.
  • the contents of the tank system exert pressure on the floor surface.
  • the floor construction must therefore be designed so that the structure does not yield under the sealing layer. This not only applies to vertical forces, but also to lateral loads.
  • the material of the substructure must therefore not be pushed by "Walk" movements of the soil to the side.
  • a radius of curvature of one meter in the ground with a 25 mm thick layer leads to a surface increase of about 2.5%. Because along the surface only a small part, ie z. For example, if 5% of the cross-section, binder is present between the grains, an elongation of at least 50% is required to follow such curvature while maintaining the bond between the grains. Thicker layers require correspondingly greater strains.
  • the invention thus relates to a flat-bottom tank system according to the preamble of claim 1, which has the features mentioned in the characterizing part of the invention.
  • the claim 2 calls for the granular or lumpy base material of the arranged in the cavity between the two bottoms of the tank pressure compensation body particularly preferred materials to be used here, the shape of the grains, moldings od.
  • Like. Limits are set only by the fact that it is not an at least partially dense "packing together" of the moldings may occur, whereby the necessary to fulfill the purpose of the invention empty spaces between the grains, moldings od.
  • Like. Are too small or even disappear, so that the "pores" between the grains and the Connection between the same, so the patency or "open porosity" within the visco-elasto-plastic pressure compensation body is guaranteed.
  • the proportions of rigid grain material to elastomer grains or -FormMechn both preferably present substantially as Einkorn material present
  • the elastoplastic or mechanical "flexibility" of the pressure compensation body forming mass targeted to the respective given requests to the same be set.
  • this ratio was estimated to be between 80:20 and 20:80, based on the total intrinsic volume of the rigid and elastic bodies, but it was found that over-weighing of the rigid material was important and beneficial.
  • synthetic or natural elastomers in particular rubber or recycled rubber granules or similar, comparatively soft or soft-elastic granular materials or shaped bodies, can be stiffened by the proportion of quartz gravel to increase the pressure-absorbing capacity, without the visco-elastic properties of the pressure compensating body completely get lost.
  • comparatively rigid aggregate material can be elasticized and / or plasticized by admixing elastomeric, in particular rubber granulate, with a suitable granulation in each case. The prerequisite for this is in any case the use of a ductile / plastic / elastic binder as a grain binding material.
  • the claim 2 further calls within the scope of the invention in addition to the grain or shaped body material to be used preferred particle size ranges thereof.
  • the claim 3 provides information about preferred quantitative ratios between rigid and elastic grains.
  • the size of the grain of this fine grain body which is usually formed with sand, possibly also bitumen-bound, sand, particle sizes of less than 1 mm are preferred.
  • Continuous monitoring of the conditions in the false bottom cavity can best be ensured by maintaining a slight negative pressure and by a continuous pressure monitoring, which essentially corresponds to the state of the art.
  • perforated tubes formed along their extension with inflow openings are arranged in the pressure compensation body in a manner which ensures that the transport paths of gas through the layer up to a sample removal point as short as possible.
  • the arrangement of the strands of the sampling lines in the pressure compensation body to be taken from the inlet 7 is particularly preferred within the scope of the invention.
  • the claim 8 has a further advantageous manner of arranging the sample removal lines and their branch strands within the pressure compensation body to the object through which the highest possible detection probability of "leakage substances" over the entire base area or within the entire volume of the pressure compensation body is guaranteed.
  • the claim 9 is a supplement to the measuring and alarm device can be seen by a pressure sensor.
  • the claim 10 calls the preferably used for the formation of the new pressure compensation body in the context of the invention, viscoplasticity having masses.
  • a discontinuous qualitative monitoring of the air or gases in the cavity between the two bottoms of the tanks on entering into the "leakage substances" can be ensured by periodically removing gas samples from this cavity, which are preferably tested by gas chromatography on their ingredients ,
  • gas chromatography can in this case the absence or absence of traces of the medium in the tank detected in the interstitial cavity become.
  • the protection of the substrate from contamination in this case remains fully upright and the tightness of the second floor can still be monitored by gas sampling from the cavity.
  • FIG. 1 schematically shows a prior art, as mentioned above, spacer fabric
  • the Fig. 2 shows a substantially corresponding to the real conditions mass, as used according to the invention for the formation of the pressure compensation body
  • Fig. 3 and 4 are sectional views of two embodiments of tanks with intermediate bottom cavity monitoring device preferred within the scope of the invention
  • FIGS. 5 and 6 show two advantageous types of arrangement of the sampling lines within the pressure compensation body ensuring the highest possible area coverage for sampling.
  • the spacer fabric 1 ' comprises two spaced apart mutually parallel fabric cover layers 20', 21 'between which z. B. approximately steep-spirally extending web-filament or - bundle of fibers 22 'extend. Between the web thread bundles 22 'remain spaces 31' free, which communicate with each other.
  • a sampling tubes 7 is inserted with sampling openings 71, through which gas samples can be taken from the space between the two tissue cover layers 20' and 21 'and fed to an analysis system.
  • the second or upper bottom of the tank is formed on the layer formed therewith by application of glass-fiber-reinforced plastic.
  • Fig. 2 shows schematically a section through the for the formation of the present invention for the arrangement in the void 16 between the two floors and a tank provided pressure compensation body 3 according to the invention, in detail, as the surface of all substantially uniform grain size kg having approximately Aggregate grains 30, z.
  • This mass of grains 30 or moldings and serving as their binder bitumen 32 is not rigid, but allowed due to their visco-plasticity small mutual relative movements of the main component of the pressure compensation body 3 forming grains 30 with each other, through which the above-described high deformations of the tank bottoms can be followed when changing the filling level of the liquid in the tank so that it does not come to a disintegration of the thus formed pressure compensation body 3. Between the grains (30) remain three-dimensional interconnected grain interstices 31 exist.
  • Fig. 3 shows - with otherwise identical reference numerals - a section through the region of the lower edge of a cylindrical steel tank 10 with lying on the substrate U, provided on the inside with a corrosion protection coating 2 lower or first base steel base 1 and the same towering cylinder wall 11 of the tank 10.
  • the second or upper steel floor 6 is welded into the tank 10.
  • a cavity 16 is formed in this way, in which the basic steel bottom 1 vollorde, such as disc-like pressure compensating body 3 from the, as shown in more detail in the detailed detail of material bitumen 32 bonded together grains 30 and open porosity intermediate grain Rooms 31 is arranged.
  • a sampling tube 7 is embedded with here successively arranged slot-like sampling openings 71, which is guided through the tank wall 11 to the outside and to which a corresponding flange 8 a pressure gauge 90 with alarm device 91 for the case of a pressure increase in the cavity 16 between the trays 1 and 6 and also a gas chromatograph 950 with one of them in the event of leakage and the entry of at least one of the stored in the tank 10 liquid F substance in the cavity 16 between the two floors 1 and 6 triggerable warning device 951 are connected.
  • the pressure compensation body 3 is covered with a, optionally also bitumen-impregnated, fine-grained sealing layer 4, which is finally closed by the second or upper steel bottom 6 at the top.
  • FIG. 3a shows the grain material / bitumen / pore mass of the pressure compensation body 3 provided for pressure equalization, as shown more realistically in FIG. 1.
  • FIG. 4 shows a section through a tank 10 with the base bottom 1, also made of steel, but with a second bottom 6 of a fiber-reinforced resin laminate and a in the same manner as shown in FIG. 3, formed pressure compensation body third
  • a metal preferably an aluminum foil 5 is arranged, through which a non-invasive electrometric determination of the layer thickness of the second bottom 6 of the tank 10th is possible.
  • a total of four at right angles to each other and radially to the center Mk of the pressure compensation body 3 extending main strands 701 of the sampling line 7 are provided, of which approximately at an angle of 60 ° four rectilinear branching off before reaching a respective adjacent main strand 701 branch branches 702.
  • Dark gray patterned are those volume areas of the Pressure equalization body 3, from which a more intense sampling can take place, while the light gray patterned areas indicate those zones in the intermediate bottom cavity 16 and in the arranged there pressure compensation body 3 from the visco-elasto-plastic mass, from which a less intense sampling can take place ,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP06450077A 2005-05-23 2006-05-23 Système de réservoirs à fond plat pour le stockage de liquides inflammables et/ou nuisibles à l'environement Withdrawn EP1728737A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0087605A AT501866B1 (de) 2005-05-23 2005-05-23 Flachboden-tankanlage für die lagerung von brennbaren und/oder umweltschädigenden flüssigkeiten

Publications (1)

Publication Number Publication Date
EP1728737A1 true EP1728737A1 (fr) 2006-12-06

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Application Number Title Priority Date Filing Date
EP06450077A Withdrawn EP1728737A1 (fr) 2005-05-23 2006-05-23 Système de réservoirs à fond plat pour le stockage de liquides inflammables et/ou nuisibles à l'environement

Country Status (2)

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EP (1) EP1728737A1 (fr)
AT (1) AT501866B1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH561143A5 (en) * 1973-02-22 1975-04-30 Zschokke Wartmann Ag Stationary tank for fluids - with spacers between inner and outer base plate of tank forming evacuated space
JPS5935125A (ja) * 1982-08-24 1984-02-25 Kobe Steel Ltd ２重殻平底円筒形タンクにおける内槽底板のガス洩れ検出方法
EP0566196A1 (fr) 1992-04-15 1993-10-20 Johnson & Johnson Clinical Diagnostics, Inc. Reservoirs
DE10014805A1 (de) 1999-03-27 2000-10-05 Ruhr Oel Gmbh Flüssigkeitsbehälter mit Lecküberwachung zur Lagerung wassergefährdender Stoffe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2843174A1 (de) * 1978-10-04 1980-04-10 Roth Werke Gmbh Doppelwandiger lagerbehaelter fuer fluessigkeiten, insbesondere fuer heizoel, sowie verfahren zu seiner herstellung
NL8503003A (nl) * 1985-02-21 1986-09-16 Schelfhorst Hendrik W Op een vaste plaats op de grond te plaatsen reservoir en werkwijze voor het vervaardigen daarvan.
DE4322859C2 (de) * 1993-07-08 1996-01-11 Sepp Mueller Einrichtung zur Langzeit-Lecküberwachung an doppelwandigen Gefäßsystemen, insbesondere doppelwandigen Tankböden

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH561143A5 (en) * 1973-02-22 1975-04-30 Zschokke Wartmann Ag Stationary tank for fluids - with spacers between inner and outer base plate of tank forming evacuated space
JPS5935125A (ja) * 1982-08-24 1984-02-25 Kobe Steel Ltd ２重殻平底円筒形タンクにおける内槽底板のガス洩れ検出方法
EP0566196A1 (fr) 1992-04-15 1993-10-20 Johnson & Johnson Clinical Diagnostics, Inc. Reservoirs
DE10014805A1 (de) 1999-03-27 2000-10-05 Ruhr Oel Gmbh Flüssigkeitsbehälter mit Lecküberwachung zur Lagerung wassergefährdender Stoffe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 133 (P - 281) 20 June 1984 (1984-06-20) *

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Publication number Publication date
AT501866A1 (de) 2006-12-15
AT501866B1 (de) 2007-07-15

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