WO1982003614A1 - A method for cancelling of subterranean tanks by filling - Google Patents

A method for cancelling of subterranean tanks by filling Download PDF

Info

Publication number
WO1982003614A1
WO1982003614A1 PCT/DK1982/000033 DK8200033W WO8203614A1 WO 1982003614 A1 WO1982003614 A1 WO 1982003614A1 DK 8200033 W DK8200033 W DK 8200033W WO 8203614 A1 WO8203614 A1 WO 8203614A1
Authority
WO
WIPO (PCT)
Prior art keywords
subterranean
filling material
filling
tank
tanks
Prior art date
Application number
PCT/DK1982/000033
Other languages
French (fr)
Inventor
& Co As H C Ervald
Original Assignee
Burmeister Ruhdi
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
Application filed by Burmeister Ruhdi filed Critical Burmeister Ruhdi
Publication of WO1982003614A1 publication Critical patent/WO1982003614A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/06—Gas pressure systems operating without fluidisation of the materials
    • B65G53/10—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas
    • B65G53/12—Gas pressure systems operating without fluidisation of the materials with pneumatic injection of the materials by the propelling gas the gas flow acting directly on the materials in a reservoir
    • 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
    • B65D88/76—Large containers for use underground

Definitions

  • the present invention relates to a method for cancelling of subterranean tanks by filling.
  • subterranean tanks e.g. oil tanks of steel.
  • Such subterranean oil tanks are not allowed to be used beyond a maximum, of 20 years, if not provided with a cathodic protection system or another authorized protection against leaking out of oil due to corrosion.
  • the authorities require either a digging up of the tank or a filling thereof with a steady inorganic material, e.g. sand.
  • a subterranean tank can be cancelled by concreting.
  • the major part of condemned subterranean tanks are oil tanks in private oil heating systems, i.e. the tanks in question mainly are smaller subterranean tanks with a volume of up to 4000 litres.
  • the method according to the invention is characterized in that a pressure medium is used to convey the filling material and to fill up the subterranean tank through a hose from a pressure vessel positioned in some distance from the subterranean tank, said pressure tank a priori being supplied with the filling material.
  • the method of cancelleing subterranean tanks thus obtained is simple, cheap and careful with respect to the surroundings, as the filling in of the tank hereby may be effected without any digging or only with a minimum of digging work at the subterranean tank.
  • the pressure filling tank may during the filling operation be placed in some distance from the subterranean tank, e.g. right outside the affected garden or estate.
  • the filling operation as a whole may be performed by one or two persons within a few hours, i.e. the method according to the invention involves a minimum of costs and a good possibility of careful affecting of the surroundings of the subterranean tank.
  • compressed air is preferably used as conveying medium to convey the filling material and to the filling in of the tank cavity, i.e. a pressure tank is used in the form of a spherically shaped vessel into which the filling material is supplied through a tightly fitting top cover.
  • a pressure tank is used in the form of a spherically shaped vessel into which the filling material is supplied through a tightly fitting top cover.
  • compressed air is fed in in order to establish an auxiliary conveying pressure above the filling material which appropriately is led into the lower outlet opening by means of a loosening mixerlike device whereby the filling material without difficulty may be fed into the injector nozzle and the conveying hose.
  • the usual filling stud of the subterranean tank may be used for the blowing in of the filling material if said filling stud does not have a too long and com plex filling tube.
  • an opening is preferably cut in the top side of the subterranean tank since appropriately an angle shaped feed-in nozzle is used to disperse the filling material.
  • common grossly sand is used as filling material - and without the sand needing any form of preliminary treatment, e.g. it is not necessary to dry the sand at all.
  • the tank cancelling is started with sucking the subterranean tank empty for removal of the rest oil and bottom sediment, if any, but, anyway, it may be appropriate to add an oil absorbing or oil neutralizing material, preferably in powder form, at least to the first portion of the filling material.
  • Fig. 1 is a draft in principle to illustrate the method according to the invention, while Fig. 2 shows a pressure vessel for use by performing the invention.
  • Fig. 1 is shown a subterranean tank 2 during cancelling by the method according to the invention.
  • the subterranean tank 2 is buried in a considerable distance from the road.
  • a topside portion 4, preferably at the filling stud of the tank, i.e. opposite to a ventilation stud 6 has been digged free and an opening 8 has been cut in the top side portion 4.
  • a blowing in nozzle 10 is mounted at the end of a relatively long thick hose 12 through which filling material in the form of common pit sand 14 is injected to fill in the tank 2.
  • a pressure tank or vessel 16 On the road a pressure tank or vessel 16 is positioned having spherical shape because the compressed air used to convey the sand 14 has a pressure of e.g. 8 ato.
  • the spherical vessel 16 is supplied with sand from a lorry 18 through a tight fitting top opening 20 manually or by means of a conveying device 22. Furthermore, on the platform of the lorry is placed a compressor 24 which supplies the spherical vessel 16 with compressed air. From the vessel 16 the filling sand 14 is led out through a lower outlet opening 26 by means of a loosening mixer device 28 (Fig. 2) and being conveyed to the subterranean tank 2 and injected therein through the hose 12 and the nozzle 10.
  • the spherical vessel 16 has diameter of some 100 cm, i.e. that it may contain about 500 litres of sand. When the spherical vessel 16 is emptied it may be refilled with sand from the lorry 18 and this cycle is repeated until the subterranean tank 2 is completely filled with sand.
  • the top opening 8 is made big enough for an ample ventilation of the conveying air taking place during the tank filling operation.
  • the subterranean tank 2 which in this case was an above ground experimental tank provided with suitable inspection openings was completely filled in with close-packed sand which during a control period of some months has not settled very much.
  • the spherical vessel 16 shown in Fig. 2 which as already mentioned has a diameter of some 100 cm or a volume of about 500 litres.
  • the filling material or the sand 14 is filled in through the top opening 20 which is provided with a tight fitting cover 28 with a locking mechanism 30.
  • said vessel is set under pressure as compressed air from the compressor 24 (Fig. 1) is connected at 32 so as to establish a conveying pressure above the sand 14 in the vessel 16 via the tube connection 33.
  • a loosening mixer device 34 is started which device is driven by means of an exterior hydraulic or pneumatic motor 36 in order to secure easy flow of sand to an injector nozzle 40 right under the outlet opening 26 of the spherical vessel 16.
  • the injector nozzle 40 is performed in a connection pipe 42 for the hose 12.
  • the spherical vessel 16 is posi- tioned upon a wheel support and is moreover adapted to be towed after a lorry.
  • the spherical vessel 16 may also be adapted to be positioned directly upon a lorry stand or upon a common trailer. For the sake of easy refilling of the spherical vessel 16 it may be appropriate that said0 vessel is not placed in a too high position irrespective of the fact that the pressure may have any configuration within the scope of the invention and may be provided with any suitable refilling system.
  • the pressure vessel 16 by the initial filling a suitable amount of an oil absorbing or oil neutralizing powder may be added to the filling sand.
  • the pressure vessel 16 may be provided with a separate store receptacle for such an agent and furthermore, means may be provided for adding the agent to the connection pipe 42 or to the injector nozzle 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

By a method for cancelling of condamned subterranean tanks by filling is used compressed air to convey the filling material (14) through a hose (1) from a pressure vessel (16) placed in substantial distance from the subterranean tank (2) and to inject the filling material into the subterranean tank (2) for the filling thereof. The cancelling of subterranean tanks thus obtained is simple, cheap, and careful with respect to the surroundings, as the work may be performed without noticeably intervention in surrounding areas such as gardens, terraces etc.

Description

A Method for Cancelling of Subterranean Tanks by Filling.
The present invention relates to a method for cancelling of subterranean tanks by filling.
Out of consideration for environment special regulations apply as to subterranean tanks, e.g. oil tanks of steel. Such subterranean oil tanks are not allowed to be used beyond a maximum, of 20 years, if not provided with a cathodic protection system or another authorized protection against leaking out of oil due to corrosion. By cancelling subterranean oil tanks the authorities require either a digging up of the tank or a filling thereof with a steady inorganic material, e.g. sand. Alternatively, a subterranean tank can be cancelled by concreting.
The major part of condemned subterranean tanks are oil tanks in private oil heating systems, i.e. the tanks in question mainly are smaller subterranean tanks with a volume of up to 4000 litres.
The said environmental demands relating to maximum age of subterranean oil tanks of steel came into force in 1960 which means that rather many subterranean tanks from the period up to 1960 now have passed said age limit and consequently must be claimed cancelled. Most of these obsoleted subterranean tanks - which as mentioned are smaller private tanks - are buried in private gardens. Of course, this involves relatively high costs for such private tank owners; however, the main disadvantage by the cancelling or removal of private subterranean oil tanks is by most people considered to be the resulting "destructions" of gardens, drives, terraces, and similar surrounding areas of private estates.
It is the purpose of the present invention to provide a method of cancelling subterranean tanks by filling which method means a cancelling of subterranean tanks which is simple, cheap, and careful with respect to the surroundings.
The method according to the invention is characterized in that a pressure medium is used to convey the filling material and to fill up the subterranean tank through a hose from a pressure vessel positioned in some distance from the subterranean tank, said pressure tank a priori being supplied with the filling material. The method of cancelleing subterranean tanks thus obtained is simple, cheap and careful with respect to the surroundings, as the filling in of the tank hereby may be effected without any digging or only with a minimum of digging work at the subterranean tank. The pressure filling tank may during the filling operation be placed in some distance from the subterranean tank, e.g. right outside the affected garden or estate. The filling operation as a whole may be performed by one or two persons within a few hours, i.e. the method according to the invention involves a minimum of costs and a good possibility of careful affecting of the surroundings of the subterranean tank.
According to claim 2 compressed air is preferably used as conveying medium to convey the filling material and to the filling in of the tank cavity, i.e. a pressure tank is used in the form of a spherically shaped vessel into which the filling material is supplied through a tightly fitting top cover. At the top of the spherical vessel compressed air is fed in in order to establish an auxiliary conveying pressure above the filling material which appropriately is led into the lower outlet opening by means of a loosening mixerlike device whereby the filling material without difficulty may be fed into the injector nozzle and the conveying hose. According to claim 3 the usual filling stud of the subterranean tank may be used for the blowing in of the filling material if said filling stud does not have a too long and com plex filling tube. However, according to claim 4 an opening is preferably cut in the top side of the subterranean tank since appropriately an angle shaped feed-in nozzle is used to disperse the filling material. As a particular advantage may be emphasized that according to claim 5 common grossly sand is used as filling material - and without the sand needing any form of preliminary treatment, e.g. it is not necessary to dry the sand at all. Preferably, the tank cancelling is started with sucking the subterranean tank empty for removal of the rest oil and bottom sediment, if any, but, anyway, it may be appropriate to add an oil absorbing or oil neutralizing material, preferably in powder form, at least to the first portion of the filling material. The invention is described in more detail in the following, reference being made to the accompanying drawing in which:-
Fig. 1 is a draft in principle to illustrate the method according to the invention, while Fig. 2 shows a pressure vessel for use by performing the invention. In Fig. 1 is shown a subterranean tank 2 during cancelling by the method according to the invention. The subterranean tank 2 is buried in a considerable distance from the road. A topside portion 4, preferably at the filling stud of the tank, i.e. opposite to a ventilation stud 6 has been digged free and an opening 8 has been cut in the top side portion 4. A blowing in nozzle 10 is mounted at the end of a relatively long thick hose 12 through which filling material in the form of common pit sand 14 is injected to fill in the tank 2.
On the road a pressure tank or vessel 16 is positioned having spherical shape because the compressed air used to convey the sand 14 has a pressure of e.g. 8 ato. The spherical vessel 16 is supplied with sand from a lorry 18 through a tight fitting top opening 20 manually or by means of a conveying device 22. Furthermore, on the platform of the lorry is placed a compressor 24 which supplies the spherical vessel 16 with compressed air. From the vessel 16 the filling sand 14 is led out through a lower outlet opening 26 by means of a loosening mixer device 28 (Fig. 2) and being conveyed to the subterranean tank 2 and injected therein through the hose 12 and the nozzle 10. The spherical vessel 16 has diameter of some 100 cm, i.e. that it may contain about 500 litres of sand. When the spherical vessel 16 is emptied it may be refilled with sand from the lorry 18 and this cycle is repeated until the subterranean tank 2 is completely filled with sand. The top opening 8 is made big enough for an ample ventilation of the conveying air taking place during the tank filling operation. Experimentally was used common pit sand and the disstance between the spherical vessel 16 and the subterranean tank 2 was about 80 metres, compressed air at 8 ato and an air volume of about 6 m3/min. was used. The subterranean tank 2 which in this case was an above ground experimental tank provided with suitable inspection openings was completely filled in with close-packed sand which during a control period of some months has not settled very much.
For use by the method is developed the spherical vessel 16 shown in Fig. 2 which as already mentioned has a diameter of some 100 cm or a volume of about 500 litres. The filling material or the sand 14 is filled in through the top opening 20 which is provided with a tight fitting cover 28 with a locking mechanism 30. When the sand 14 is filled in the spherical vessel 16 said vessel is set under pressure as compressed air from the compressor 24 (Fig. 1) is connected at 32 so as to establish a conveying pressure above the sand 14 in the vessel 16 via the tube connection 33. Simultaneously a loosening mixer device 34 is started which device is driven by means of an exterior hydraulic or pneumatic motor 36 in order to secure easy flow of sand to an injector nozzle 40 right under the outlet opening 26 of the spherical vessel 16. The injector nozzle 40 is performed in a connection pipe 42 for the hose 12. The spherical vessel 16 is posi- tioned upon a wheel support and is moreover adapted to be towed after a lorry. The spherical vessel 16 may also be adapted to be positioned directly upon a lorry stand or upon a common trailer. For the sake of easy refilling of the spherical vessel 16 it may be appropriate that said0 vessel is not placed in a too high position irrespective of the fact that the pressure may have any configuration within the scope of the invention and may be provided with any suitable refilling system.
For a given cancelling work the pressure vessel 16 by the initial filling a suitable amount of an oil absorbing or oil neutralizing powder may be added to the filling sand. Alternatively, the pressure vessel 16 may be provided with a separate store receptacle for such an agent and furthermore, means may be provided for adding the agent to the connection pipe 42 or to the injector nozzle 40.

Claims

C l a i m s :
1. A method for cancelling of subterranean tanks by filling with a steady inorganic material, characterized in that a pressure medium is used to cbnvey the filling material and to fill up the subterranean tank (2) through a hose (12) from a pressure vessel (16) positioned in some distance from the subterranean tank (2), said pressure vessel (16) being previously supplied with the filling material.
2. A method according to claim 1 , characterized in that compressed ais is used as pressure medium, that an air pressure is established above the filling material
(14) in the pressure vessel (16), that the filling material (14) is agitated at a lower outlet opening (26) of the pressure vessel (16) for injecting the filling material (14) into an injector nozzle (40) and that compressed air is supplied to the injector nozzle (40) for conveying the filling material (14) through the hose (12) to the subterranean tank (2).
3. A method according to claim 1 or 2, characterized in that the usual filling stud of the subterranean tank
(2) is used for the blowing in of the filling material as the subterranean tank (2) is simultaneously ventilated through its usual ventilation stud (6).
4. A method according to claim 1 or 2, characterized in that a top side portion of the subterranean tank (2) is laid open and an opening (8) is cut therein, and that an injecting nozzle (10) is used in the form of an angular bended tube by means of which the injected filling material is distributed in the whole tank (2).
5. A method according to claims 1-4, characterized in using common grossly sand (pit sand) as filling material.
6. A method according to claims 1-5, characterized in adding to the first portion of filling material an oil absorbing and/or oil neutralizing material.
PCT/DK1982/000033 1981-04-15 1982-04-15 A method for cancelling of subterranean tanks by filling WO1982003614A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK1710/81810415 1981-04-15
DK171081A DK146048C (en) 1981-04-15 1981-04-15 PROCEDURE FOR DELETING EARTH TANKS IN FILLING

Publications (1)

Publication Number Publication Date
WO1982003614A1 true WO1982003614A1 (en) 1982-10-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1982/000033 WO1982003614A1 (en) 1981-04-15 1982-04-15 A method for cancelling of subterranean tanks by filling

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EP (1) EP0076305A1 (en)
DK (1) DK146048C (en)
WO (1) WO1982003614A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118512A (en) * 1982-04-21 1983-11-02 Ace Nylon Conveyor for particulate material
WO2023214110A1 (en) * 2022-05-03 2023-11-09 The Home Of The North A device for dispensing granular gritting material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710232A (en) * 1950-06-14 1955-06-07 Lawrence D Schmidt Method for filling cavities with granular solids
US3180689A (en) * 1962-04-26 1965-04-27 Albert Air Conveyor Corp Horizontal pressure tank construction
US3793844A (en) * 1971-04-07 1974-02-26 Bolt Associates Inc System for increasing the load-bearing capacity of soil
DE2652344A1 (en) * 1975-11-21 1977-05-26 Neu Lille Sa Des Ets DEVICE FOR PNEUMATIC TRANSPORT OF POWDERED OR GRANULATED SUBSTANCES

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2710232A (en) * 1950-06-14 1955-06-07 Lawrence D Schmidt Method for filling cavities with granular solids
US3180689A (en) * 1962-04-26 1965-04-27 Albert Air Conveyor Corp Horizontal pressure tank construction
US3793844A (en) * 1971-04-07 1974-02-26 Bolt Associates Inc System for increasing the load-bearing capacity of soil
DE2652344A1 (en) * 1975-11-21 1977-05-26 Neu Lille Sa Des Ets DEVICE FOR PNEUMATIC TRANSPORT OF POWDERED OR GRANULATED SUBSTANCES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118512A (en) * 1982-04-21 1983-11-02 Ace Nylon Conveyor for particulate material
WO2023214110A1 (en) * 2022-05-03 2023-11-09 The Home Of The North A device for dispensing granular gritting material

Also Published As

Publication number Publication date
DK146048B (en) 1983-06-13
DK171081A (en) 1982-10-16
EP0076305A1 (en) 1983-04-13
DK146048C (en) 1983-11-07

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