WO1995003687A1 - Couverture flottante de reservoir ouvert pour liquide - Google Patents

Couverture flottante de reservoir ouvert pour liquide Download PDF

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Publication number
WO1995003687A1
WO1995003687A1 PCT/DK1994/000295 DK9400295W WO9503687A1 WO 1995003687 A1 WO1995003687 A1 WO 1995003687A1 DK 9400295 W DK9400295 W DK 9400295W WO 9503687 A1 WO9503687 A1 WO 9503687A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
reservoir
cover according
liquid
floating ring
Prior art date
Application number
PCT/DK1994/000295
Other languages
English (en)
Inventor
Knud Carlsen
Original Assignee
Barslund, Jensen, Kristian
Pedersen, Birger, Kristian
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DK89193A external-priority patent/DK89193A/da
Application filed by Barslund, Jensen, Kristian, Pedersen, Birger, Kristian filed Critical Barslund, Jensen, Kristian
Priority to AU72272/94A priority Critical patent/AU7227294A/en
Publication of WO1995003687A1 publication Critical patent/WO1995003687A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C3/00—Treating manure; Manuring
    • A01C3/02—Storage places for manure, e.g. cisterns for liquid manure; Installations for fermenting manure
    • A01C3/028—Covers, roofs or other structures for covering manure storage places
    • 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
    • B65D88/00—Large containers
    • B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets

Definitions

  • the present invention relates to a floating cover for an open reservoir for a liquid, such as a reservoir for liquid manure, which cover is adapted to reduce evaporation from the surface of the liquid and comprises a layer of granulated material of a density which is less than that of the liquid contained in the reservoir, and which cover is provided with means for collection and diversion of rainwater falling on the cover, for example in the form of a waterproof sheet.
  • the cover will reduce the evaporation of nitrogen and ammonia, as a result of which the fertilizing value of the liquid manure is maintained to the greatest extent possible.
  • DK Patent Application No. 1674/91, cf. DK 167489 Bl discloses a floating cover, which is essentially of the above described type.
  • the prior art cover has a drawback in that the granulated material, in order to secure collection of rainwater from the surface of the cover as well as gases from the under ⁇ side thereof, must have a layer so designed that the layer has increasing thickness in the direction towards the center of the cover, and the top side of the layer must be sufficiently even.
  • the granulated material is secured in a safe and reliable manner and will be efficiently prevented from being blown towards one side in the open reservoir under the influence of a high wind, whereby its thickness might otherwise change after the cover has been positioned in place. Also, clogging of the reservoir during emptying is prevented, and the granulated material cannot be mixed with the contents of the reservoir during stirring.
  • the bag is partly or completely constituted by a net having meshes of sizes, which are inferior to the sizes of the particles of the granulated material.
  • the cover may be advantageous in that the net is secured to or contained in a substantially stronger carrier net of such strength that it becomes possible to pull up the entire cover from the reservoir.
  • An embodiment is advantageous in that the cover comprises a number of sections.
  • An additional embodiment is advantageous in that the cover at its outer rim or outer rims resting against the inner wall of the reservoir are secured to a floating ring, which may be divided into sections.
  • a higher degree of fluid-tightness is hereby achieved as compared to the known constructions.
  • the floating ring and the cover will rise and fall concurrently with the re- plenishment, and the floating ring may appropriately be made of a material, which has good wearing qualities for this movement, and the net should not envelop the floating cover. It is possible to make the cover of such strength that it becomes capable of carrying a person afloat, where ⁇ by accidents can be prevented.
  • the floating ring also pro ⁇ vides a firm hold on the cover as it is pulled up from the reservoir to be emptied of its contents, or when the con ⁇ tents must be stirred.
  • a further development of this embodiment is advantageous in that the size of the cover or of the sections and the filling with granulated material are so adapted that the floating ring or the floating ring sections are pushed out towards the inner wall of the reservoir, and in that the cover at a distance from the inner wall is forced down into a lower level as compared to the level of the floating ring or the floating ring sections.
  • the cover Since the cover has been just so dimensioned that a contact pressure is achieved along the inner wall of the reservoir, and the cover is lowest at a distance from the inner side of the reservoir, it is comparatively easy to provide means for diversion of rainwater falling on the cover, as well as means for collection and removal of the diverted rainwater.
  • the said means may therefore advantageously comprise at least one collecting sump having for example a pump and/or an outlet pipe.
  • the pump and/or the pipe is adapted to maintain such level of water in the collecting sump that the surface of the sheet is weighed down by the collecting sump and slopes towards the sump.
  • the collecting sump may advantageously be provided with sensors which are adapted to sound an alarm if liquid manure in a quantity exceeding a predetermined quantity is recorded.
  • Fig. 1 is a top plan view of an open, circular reservoir with a cover according to the invention
  • Fig. 2 is a vertical section of the reservoir illustrated in Fig. 1,
  • Fig. 3 is a top plan view of an open, circular reservoir, in a second embodiment of a cover according to the invention.
  • Fig. 4 is a vertical section of the reservoir illustrated in Fig. 3.
  • Figs. 1 and 2 illustrate an open reservoir having a wall 1, which is circular cylindrical.
  • the reservoir contains a liquid 2, for example liquid manure, and a cover 3 according to the present specification floats upon the liquid.
  • a floating ring 4 is secured to the rim of the cover 3.
  • the cover 3 consists of a granulated material 5, which is contained in a closed bag or membrane 6.
  • the granulated material 5 is distributed at equal thickness in the bag 6, which is constituted by a net having meshes of a size which is inferior to the particle size of the granulated material.
  • the particle size of the granulated material varies between 1 and 10 mm, whereby the spaces between the larger particles can be filled up by the smaller particles thus achieving the maximum packing possible of the material.
  • a carrier net 7 is secured to the net 6 to the effect that the cover 3 can be pulled up by means hereof, for example for the purpose of stirring and/or emptying the contents of the reservoir.
  • the carrier net 7 may, as illustrated in Fig. 1, consist of a number of ropes or cables, which are mutually gathered at the center of the reservoir and extend radially outwards towards the floating ring 4 and are connected hereto in a manner, which is not illustrated in detail.
  • the means for drainage of the rainwater comprise a water ⁇ proof sheet 8, for example of polyester, resting on the top side of the closed bag 6, and which is adapted to lead the water to a collecting sump 10 provided at a distance within the floating ring 4 to the effect that it will contribute to weighing down the cover 3 as well as the sheet 8 in ⁇ clining in the direction towards the collecting sump 10.
  • a water ⁇ proof sheet 8 for example of polyester
  • the means for removal of rainwater in the collecting sump comprise an immersion pump 11, capable of emptying the sump through an outlet pipe 12, the immersion pump 11 being regulated by an automatic gain control.
  • the automatic gain control may advantageously be adjusted to maintain a certain water level within the collecting sump 10 to the effect that its weight is at all times capable of weighing down the sheet 8 to a reasonable ex ⁇ tent so that the surface of the cover will at all times maintain the-necessary inclination towards the collecting sump.
  • Figs. 3 and 4 illustrate a second embodiment of the cover of the invention.
  • a flow line 7 extends diametrically in the reservoir, thus dividing the cover 3 into two sections of equal size.
  • means 8 have been provided for diversion of rainwater falling on the cover 3, as well as means 10, 11, 12 for collection and removal of the drained rainwater.
  • the collecting sump 10 is provided with sensors 10, which are adapted to sound an alarm if a pre ⁇ determined amount of liquid manure in the water is exceeded, thus causing an intervention in order to collect and remove the polluted water in accordance with current legislation concerning the environment.
  • the granulated material may for example be particles of foamed plastic, however it is advantageous if the granulated material is of the type LECA (Registered Trade ⁇ mark).

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sewage (AREA)

Abstract

Couverture (3) destinée par exemple à un réservoir à purin et constituée de matières granulées du type LECA (5) enfermées dans un sac (6) composé d'un filet et adapté pour être relevé de sorte qu'il dégage l'ouverture du réservoir pendant l'agitation ou la vidange du liquide qu'il contient. Par conséquent, les matières granulées (5) ne peuvent se mélanger au liquide présent dans le réservoir. En outre, on a prévu une couverture de sécurité fiable utilisable même par temps de grand vent. Par ailleurs, le risque d'accidents est réduit et la mise en place à la surface du sac (6) d'une feuille imperméable (8) permet de recueillir l'eau de pluie afin qu'elle ne dilue pas le contenu liquide du réservoir.
PCT/DK1994/000295 1993-07-30 1994-07-29 Couverture flottante de reservoir ouvert pour liquide WO1995003687A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU72272/94A AU7227294A (en) 1993-07-30 1994-07-29 Floating cover for an open reservoir for a liquid

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK89193A DK89193A (da) 1993-07-30 1993-07-30 Overdækning til åbne tanke, fx gylletanke
DK0891/93 1993-07-30
DK0021/94 1994-01-04
DK2194A DK170829B1 (da) 1993-07-30 1994-01-04 Overdækning til åbne tanke, for eksempel gylletanke

Publications (1)

Publication Number Publication Date
WO1995003687A1 true WO1995003687A1 (fr) 1995-02-09

Family

ID=26063139

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1994/000295 WO1995003687A1 (fr) 1993-07-30 1994-07-29 Couverture flottante de reservoir ouvert pour liquide

Country Status (3)

Country Link
AU (1) AU7227294A (fr)
DK (1) DK170829B1 (fr)
WO (1) WO1995003687A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2794335A1 (fr) * 1999-06-02 2000-12-08 Lionel Salaun Couverture de fosse a lisier
WO2003016178A1 (fr) * 2001-08-06 2003-02-27 Zhenqi Song Reservoir de stockage de petrole dote d'une couverture flottante de type lit flottant
EP2530032A1 (fr) * 2011-06-03 2012-12-05 Poseidon Concepts Limited Partnership Couvercle de récipient

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1590877A (en) * 1925-08-17 1926-06-29 Black Wilbert Fire preventing and extinguishing means
US2359416A (en) * 1942-03-31 1944-10-03 Bethlehem Steel Corp Liquid storage tank
US3049261A (en) * 1959-05-22 1962-08-14 Standard Oil Co Floating blanket
DE2712709A1 (de) * 1977-03-23 1978-09-28 Martin Ing Grad Staemmler Abdeckung fuer guelle-, jauchesilos o.dgl.
USRE30146E (en) * 1964-06-26 1979-11-13 Howard D. Webb Floating cover for a liquid storage reservoir
DE3639993C1 (en) * 1986-11-22 1987-07-16 Reinhard Siedenburg Appliance for the treatment of liquid manure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1590877A (en) * 1925-08-17 1926-06-29 Black Wilbert Fire preventing and extinguishing means
US2359416A (en) * 1942-03-31 1944-10-03 Bethlehem Steel Corp Liquid storage tank
US3049261A (en) * 1959-05-22 1962-08-14 Standard Oil Co Floating blanket
USRE30146E (en) * 1964-06-26 1979-11-13 Howard D. Webb Floating cover for a liquid storage reservoir
DE2712709A1 (de) * 1977-03-23 1978-09-28 Martin Ing Grad Staemmler Abdeckung fuer guelle-, jauchesilos o.dgl.
DE3639993C1 (en) * 1986-11-22 1987-07-16 Reinhard Siedenburg Appliance for the treatment of liquid manure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2794335A1 (fr) * 1999-06-02 2000-12-08 Lionel Salaun Couverture de fosse a lisier
WO2003016178A1 (fr) * 2001-08-06 2003-02-27 Zhenqi Song Reservoir de stockage de petrole dote d'une couverture flottante de type lit flottant
US7225942B2 (en) 2001-08-06 2007-06-05 Zhenqi Song Oil storage tank equipped with a floating bed type inner floating roof
EP2530032A1 (fr) * 2011-06-03 2012-12-05 Poseidon Concepts Limited Partnership Couvercle de récipient

Also Published As

Publication number Publication date
DK170829B1 (da) 1996-02-05
AU7227294A (en) 1995-02-28
DK2194A (da) 1995-01-31

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