EP2390013A2 - Équipement et procédé pour la décontamination rapide de citernes enterrées utilisés pour le stockage des combustibles liquides - Google Patents

Équipement et procédé pour la décontamination rapide de citernes enterrées utilisés pour le stockage des combustibles liquides Download PDF

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Publication number
EP2390013A2
EP2390013A2 EP11168134A EP11168134A EP2390013A2 EP 2390013 A2 EP2390013 A2 EP 2390013A2 EP 11168134 A EP11168134 A EP 11168134A EP 11168134 A EP11168134 A EP 11168134A EP 2390013 A2 EP2390013 A2 EP 2390013A2
Authority
EP
European Patent Office
Prior art keywords
tank
equipment
product
pump
underground tanks
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Withdrawn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
EP11168134A
Other languages
German (de)
English (en)
Other versions
EP2390013A3 (fr
Inventor
Marco Manzecchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
T&a Sa - Tecnologie E Ambiente
Original Assignee
T&a Sa - Tecnologie E Ambiente
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 T&a Sa - Tecnologie E Ambiente filed Critical T&a Sa - Tecnologie E Ambiente
Publication of EP2390013A2 publication Critical patent/EP2390013A2/fr
Publication of EP2390013A3 publication Critical patent/EP2390013A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
    • B08B9/0933—Removing sludge or the like from tank bottoms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays

Definitions

  • the present invention relates to complete equipment with specifically designed devices and a method for the rapid decontamination of non-horizontal axis, underground tanks used for the storage of liquid fuels.
  • the equipment and the method for the rapid decontamination of underground tanks used for the storage of liquid fuels is designed for the cleaning of underground tanks used for the storage of liquid fuels without the need to disassemble the equipment on the manhole with the exception of the two accesses enabling the introduction of devices necessary for the operation.
  • the equipment and the method according to the present invention offer several major advantages over known solutions, principally in that they enable rapid execution of the operation because it is only necessary to disassemble a minimum part of the manhole equipment.
  • a further advantage is that under the same operating conditions as the traditional method of washing with water, the method ensures improved cleaning results thanks to a special device for washing the walls.
  • the equipment and method limit the amount of waste to be disposed of and at the same time optimise safety for the operator who does not need to enter the tank.
  • the principal field of application for the invention is in the ordinary activities related to the operation of tanks containing hydrocarbons or flammable liquids and the ordinary maintenance of these tanks.
  • Decontamination of a tank is understood as the set of activities needed to return the tank to its original state by eliminating the product residues inside the tank which might contaminate the liquid fuel fed into the tank.
  • a further drawback is that this cleaning method requires a large amount of water which has to be removed in order to prevent contamination of the fuel and then has to be disposed of as special waste.
  • This method does not require the presence of an operator inside the tank and therefore avoids a situation which is potentially hazardous for operators.
  • a further disadvantage of this method is that it produces contaminated waste water which has to be disposed of in accordance with special waste disposal regulations.
  • the present invention overcomes the shortcomings described above by providing equipment and a method for the rapid decontamination of underground tanks used for the storage of liquid fuels, typically hydrocarbons.
  • the equipment according to the present invention substantially comprises a transfer pump, a vacuum pump, a dosing pump, a device for washing the inside surfaces of the tank, a device for the suction removal of sludge and a filtration unit.
  • the equipment can be mounted on an easy to manoeuvre mobile base or directly onto a special vehicle fitted with a storage tank.
  • the purpose of the present invention is to enable the cleaning of liquid fuel storage tanks without having to disassemble the equipment present on the manhole except for the two access points needed to insert the cleaning equipment and the suction and delivery hoses of the system.
  • the filtration unit ensures the removal of large solid particles and also has the possibility of performing fine and very fine filtration down to 0.8 ⁇ m thereby removing the sludge and separating the water.
  • the device system has the following advantages:
  • the numeral 10 indicates in its entirety a vehicle equipped for the decontamination of tanks according to the present invention, while the numeral 11 indicates the tank to be decontaminated.
  • the vehicle equipped for decontamination comprises a storage tank 12a and a transfer pump 13 which in Figure 2 is substituted by a vacuum pump 14.
  • the decontamination vehicle 10 is equipped with a dosing pump 15 used to feed biocidal product 16 into the tank.
  • the numeral 17 indicates the piping used to transfer the liquid from the tank 11 to the storage tank via the transfer pump 13.
  • the numeral 18 indicates the piping which carries on its end the sludge suction device 19.
  • Figure 13 shows the final transfer step where the liquid fuel in the tank 11 is restored to its original level by the transfer pump 13 which draws the fuel from the storage tank 12a.
  • the first step in the procedure is to dismantle the equipment on the manhole of the tank 11 and switch off any piping and other equipment.
  • the video inspection equipment can be mounted on the opening prepared previously.
  • the next step is to store the clean product ( Fig. 1 ).
  • the clean product is transferred to the supplementary storage tank 12a mounted on the vehicle 10, or, in the case of large volumes, to an external supplementary tank.
  • biocidal product can be dosed in order to counteract the presence of any bacteria contained in the product.
  • the fourth step involves removing the sediment, that is, vacuuming up the sludge remaining inside the tank 11 using the special sludge suction device 19 fixed to the semi-rigid piping and then transferring the results to the tank 12b.
  • This step is fundamental to reducing the times of the operation. Increasing the amount of sludge removed in this step reduces the amount of time needed for filtration.
  • the next step is washing of the tank walls with a specified quantity of fresh product (previously stored in tank 12a or in a supplementary tank) which is returned to the tank 11 being decontaminated in sufficient amounts to guarantee that the system will function.
  • Fresh product is applied under pressure using the special head 20 mounted on semi-rigid piping which in turn is connected to the delivery hose of the transfer pump 13.
  • the next step consists of washing of the tank with the device for washing the tank walls 20 which, as already mentioned, comprises a special cone-shaped head with two suitably shaped slits which spray a jet at 360° covering the entire circumference of the tank surface.
  • the filtration of the washing liquid is performed by two pre-filters upstream from the transfer pump which filter the larger size inert particles and two filters downstream for filtering the smaller inert particles.
  • Filtration involves complete recirculation, that is, the product is drawn from the tank 11, filtered and then returned directly to the inside of the tank 11.
  • the pump is suitably regulated to optimise filtration as a function of the contaminant load present in the mixture to be treated so that this work is performed at a variable capacity.
  • this second and final filtration step is to hold back the dirty part of the mixture being treated by using a very fine filter and separating out the water with a special filter.
  • Fine filtration is performed in a single step.
  • the product after storage in the special supplementary tank or the tank 12c, is returned to the inside of the client's tank 11.
  • the last step is product transfer, that is, the delivery of clean product back into the inside of the original tank 11 ( fig. 13 ).
  • the system according to the present invention achieves the stated original purpose of the invention , that is, it enables the cleaning of tanks used for the storage of liquid fuels without the need to dismantle the equipment on the manhole except for the two access points used to insert the suction and delivery pipes of the system.
  • the filtration unit ensures the removal of large solid particles and also has the possibility of performing a further fine filtration down to 0.8 ⁇ m thereby removing the sludge and separating the water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP11168134A 2010-05-31 2011-05-30 Équipement et procédé pour la décontamination rapide de citernes enterrées utilisés pour le stockage des combustibles liquides Withdrawn EP2390013A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SM201000065A SM201000065B (it) 2010-05-31 2010-05-31 Impianto e metodo per la bonifica veloce di serbatoi interrati adibiti al contenimento di carburantiliquidi

Publications (2)

Publication Number Publication Date
EP2390013A2 true EP2390013A2 (fr) 2011-11-30
EP2390013A3 EP2390013A3 (fr) 2013-02-20

Family

ID=44513696

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11168134A Withdrawn EP2390013A3 (fr) 2010-05-31 2011-05-30 Équipement et procédé pour la décontamination rapide de citernes enterrées utilisés pour le stockage des combustibles liquides

Country Status (2)

Country Link
EP (1) EP2390013A3 (fr)
SM (1) SM201000065B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023015324A1 (fr) * 2021-08-04 2023-02-09 Du Rand Andre Joachim Henry Dispositif et méthode de nettoyage de réservoir
US11731885B2 (en) 2020-03-17 2023-08-22 Fluid Handling Llc Coalescing media for hydronic air and sediment separation device
US12053808B2 (en) 2021-06-03 2024-08-06 Wildyn Blane Mayfield Anderson Multi-phase storage vessel cleaning and maintenance system and method of use

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2332940A (en) * 1940-05-06 1943-10-26 Charles E Senke Tank cleaning apparatus
US3090393A (en) * 1959-07-06 1963-05-21 Edward L Valentine Method and apparatus for cleaning tanks
US4840732A (en) * 1986-08-21 1989-06-20 Rawlins P J Thomas Fuel tank cleaning system
US5409025A (en) * 1993-10-06 1995-04-25 Semler Industries Inc. Apparatus and method for cleaning underground liquid fuel storage tanks
US5640982A (en) * 1994-11-18 1997-06-24 Landry Service Co. Inc. Tank cleaning system using collapsible robotic tank entry vehicle
FR2757088B1 (fr) * 1996-12-13 1999-01-15 Rech Et De Formation Pourl Ass Procede et unite de nettoyage de cuves
DE19811421C2 (de) * 1998-03-17 2001-09-13 Alfa Laval Lkm As Kolding Tankreinigungsvorrichtung
US7320329B2 (en) * 2004-09-14 2008-01-22 Baker Hughes Incorporated Remotely operated cleaning device, especially suitable for storage tanks on vessels
US9173538B2 (en) * 2007-03-06 2015-11-03 Wagner Spray Tech Corporation Cleaning brush with pulsing water
WO2009088316A1 (fr) * 2007-12-29 2009-07-16 Schlumberger Canada Limited Biocide pour milieux liquides, utilisé dans la production d'hydrocarbures et le transport de pétrole et de produits pétroliers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11731885B2 (en) 2020-03-17 2023-08-22 Fluid Handling Llc Coalescing media for hydronic air and sediment separation device
US12053808B2 (en) 2021-06-03 2024-08-06 Wildyn Blane Mayfield Anderson Multi-phase storage vessel cleaning and maintenance system and method of use
WO2023015324A1 (fr) * 2021-08-04 2023-02-09 Du Rand Andre Joachim Henry Dispositif et méthode de nettoyage de réservoir

Also Published As

Publication number Publication date
SM201000065B (it) 2013-01-14
SM201000065A (it) 2012-01-18
EP2390013A3 (fr) 2013-02-20

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