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WO2013002637A1 - Procédé et appareil pour nettoyer des réservoirs - Google Patents

Procédé et appareil pour nettoyer des réservoirs Download PDF

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Publication number
WO2013002637A1
WO2013002637A1 PCT/NL2012/050452 NL2012050452W WO2013002637A1 WO 2013002637 A1 WO2013002637 A1 WO 2013002637A1 NL 2012050452 W NL2012050452 W NL 2012050452W WO 2013002637 A1 WO2013002637 A1 WO 2013002637A1
Authority
WO
WIPO (PCT)
Prior art keywords
vapour
inert gas
tank
hazardous materials
inertising
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.)
Ceased
Application number
PCT/NL2012/050452
Other languages
English (en)
Inventor
Perry Van Der Bogt
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.)
VCS Global Systems BV
Original Assignee
VCS Global Systems BV
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 VCS Global Systems BV filed Critical VCS Global Systems BV
Publication of WO2013002637A1 publication Critical patent/WO2013002637A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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

Definitions

  • the invention relates to a method and an apparatus for cleaning tanks such as storage tanks and ship's tanks, and particularly for removing vapours present in the tank.
  • tanks are ventilated, especially if hazardous materials, such as benzene, have been present in the tank.
  • Said ventilating is a time-consuming procedure producing vapours that are potentially dangerous to the environment.
  • the emitted gasses are combusted in an incinerator or discharged into the outside air. Said methods are both expensive and detrimental to the environment.
  • the invention described herein avoids the risk of ignition and reduces the required external energy required for cleaning tanks by cleaning a tank in an energy-saving manner and by degassing and inertising a tank in one combined process during the cleaning procedure .
  • vapour in the form of vapour.
  • the vapour is subsequently cooled down. Due to cooling down, a part of the vapour condenses.
  • the liquid components are then collected.
  • An inertising system supplies an inert gas or inert gas mixture to the residual vapour and the overall gas mixture is heated and passed back into the tank. The cycle is repeated until an acceptable or desired residual level of material in the tank has been reached.
  • This invention thus relates to a method for removing residues of hazardous materials from a tank, wherein
  • the vapour in the collection unit is cooled down to a temperature of at least 5°C below the initial temperature and above the melting point or melting range of the hazardous materials to be removed, wherein condensed hazardous materials of the vapour are collected, (iii) an inert gas or inert gas mixture is supplied to the residual vapour,
  • step (i) it is also possible to supply an inert gas or inert gas mixture to the vapour containing hazardous materials that comes from the tank, prior to it being passed to the collection unit in step (i) .
  • heating of vapours present in a tank entails the risk of ignition and thus an increased risk of explosion, heating of vapour takes place as from the end of the first vapour circulation, when the vapour mixture is inert.
  • Heating the inert residual vapours may take place
  • heating the inert residual vapours takes place immediately after condensation and therefore prior to supply of an inert gas or inert gas mixture to the residual vapour.
  • the temperature at which the vapour is cooled down preferably is below the condensation point or condensation range of the hazardous materials to be removed and approximates the condensation point or condensation range of the hazardous materials to be removed as close as possible.
  • the temperature at which the vapour is heated preferably is above the condensation point or condensation range of the hazardous materials to be removed and approximates the condensation point or condensation range of the hazardous materials to be removed as close as possible.
  • a cooling medium such as water or another coolant may be used for cooling the vapour.
  • This medium may also be used for heating the vapour mixture.
  • bilge water may for instance be used.
  • Water from the sea or a river may also be pumped up in order to be used as a cooling medium.
  • the vapour may be passed to a collection unit by using a pump.
  • residual vapour may be passed out of the system after condensation of the hazardous materials.
  • the last residues of the hazardous materials may be filtered out of the non-inert residual vapour.
  • This method renders it possible to remove hazardous materials from a tank to a desired level of hazardous material in one cycle and that in said cycle the tank is also inertised to a desired level. This results in saving time and therefore economic advantage .
  • the inert gas used in the method according to the invention may be nitrogen, carbon dioxide, helium, neon, argon, krypton, xenon, sulphur hexafluoride , radon or another inert gas, or an inert gas mixture.
  • the inert gas or inert gas mixture is supplied to the above-mentioned residual vapour which after adding the inert gas or inert gas mixture, results in the creation of a gas mixture containing an oxygen content of 5% or less based on volume, wherein the inert gas is the main component. This result is already achieved after one cycle.
  • Nitrogen is often used in inertising industrial systems and is both harmless and cheap.
  • the source of the inert gas or inert gas mixture may be a pure or purified gas.
  • the invention thus also relates to a method wherein the inert gas or inert gas mixture is a purified gas, generated by inertising gas mixtures, particularly air or mixtures with air, present in the tank or pipes.
  • a purified gas it is preferred that the purified gas is generated within the apparatus used in this method.
  • it is inertised by extracting oxygen by means of for instance an inertising system such as a filter system.
  • an inertising system such as a filter system.
  • the same inertising system may extract oxygen from air supplied from the outside and the resulting inert gas mixture may be introduced into the apparatus used in this method. Adding an external inert gas as described above will not be necessary then.
  • inert gas or inert gas mixture is extracted from the air or from heating systems and cooling systems by inert-gas- generators .
  • An inertising system supplying an inert gas or inert gas mixture to the residual vapour may comprise a flue gas installation, a combustion engine, a liquid-nitrogen system, a gas-nitrogen system, an argon system or another system capable of supplying inert gas or an inert gas mixture to the residual vapour in order to inertise the tank.
  • the invention also relates to an apparatus for removing residues of hazardous materials from a tank, comprising a pipe (2) provided with a pump (3), which pipe is connected to a tank and leads to a cooler (4), from the cooler (4) to a inertising system (13) from where the vapour is passed to the tank (1) via a heating system (19), wherein hazardous material condensed from the vapour may be passed out of the cooler (4) via a pipe (11) to a reservoir (12) .
  • the cooler (4) is suitably provided with a cooling jacket (10) or internally placed cooling radiator, spiral or heat exchanger, in which cooling medium circulates through a pipe (5) via a reservoir (6) for cooling medium and a pipe (7) via a cooling unit (8) and a pipe (9) .
  • FIG. 1 A schematic view of an apparatus of the invention described herein is shown in figure 1, wherein the hazardous vapour described above is sucked out of a tank (1) via a pipe (2) by means of a pump (3) and passed to a cooler (4) .
  • a cooling jacket cooling device could be used for this cooling system.
  • the vapour condensed by the cooling device is passed to a reservoir (12) via a pipe (11) .
  • a cooling unit (8) supplies coolant to a cooling jacket (10) of the cooler (4) via pipe (9), wherein the coolant is passed back via a pipe (5), a coolant reservoir (6) and a pipe (7), to the cooling unit (8) .
  • the residual vapour in the cooler (4) is passed onwards via the pipe (2) to an inertising system (13) as described above, where from an external source (14) via a pipe (15) an inertising gas from the group described above is supplied to the residual vapour.
  • the system offers the possibility to blow vapour to the outside, optionally after filtering, via at least one pipe (16) .
  • Said at least one pipe (16) may be connected to the inertising system (13) and/or pipe (2) and/or be located elsewhere in the apparatus.
  • the heating system may be placed after the cooler (4) but before the inertising system (13), after the inertising system but before the tank (1), be connected to the tank (1), or be located elsewhere in the apparatus.
  • the heating system is placed after the cooler (4) but before the inertising system (13) .
  • the apparatus according to the invention forms a closed system. That means that hazardous materials from the tank cannot leave the apparatus, except when this is desirable, such as when the hazardous materials have to be removed from the reservoir (12) .
  • a "closed system” should furthermore be understood to mean that in such a system supply and discharge of gasses or gas mixtures only takes place when this is desirable.
  • optionally undesirable material may be removed using a scrubber or in another suitable manner.
  • the method and apparatus according to the invention may be used for cleaning tanks that for instance transport aromatic substances such as benzene, ethanol or other solvents or petroleum or petroleum products, such as gasoline, or palm oil or olive oil.
  • aromatic substances such as benzene, ethanol or other solvents or petroleum or petroleum products, such as gasoline, or palm oil or olive oil.
  • the method and apparatus according to the invention furthermore offer the possibility of cleaning tanks in a mobile manner at any desired location, without hazardous substances being emitted into the environment.
  • the apparatus namely is a mobile apparatus comprised in a mobile container, such as a standard shipping container. This may for instance be a 40-foot container. This renders it possible to move the apparatus to the location where a tank needs to be degassed.
  • a mobile container such as a standard shipping container.
  • a 40-foot container This renders it possible to move the apparatus to the location where a tank needs to be degassed.
  • Such an apparatus may furthermore easily be placed on board a ship such as an oil tanker.
  • the method according to the invention furthermore offers the advantage that removed hazardous substances that end up in the reservoir (12) may easily be recycled.
  • the method may also be used in the reduction of odour emission by the vapours present in the tank, which vapours come from materials such as for instance di-hydrogen sulphide and mercaptans.
  • a suction pressure or outlet pressure of between 100 and 250 hPa preferably a suction pressure of 190-210 hPa or an outlet pressure of 140-160 hPa, is set to suck or press, respectively, the vapour out of the tank.
  • the vapour in step (ii) preferably is cooled down to between -10°C and 10°C and the method preferably is carried out at an outside air temperature of -20°C to 40°C and at a controllable gas suction temperature of 0-30°C.
  • the invention may also be used in the emission-free transfer of hazardous substances from a tank on a ship to a tank on another ship, transferring hazardous substances from the quayside into a tank of a ship and degassing tank lorries, airplanes or tank wagons.
  • the invention described herein particularly applies to substances having a melting point that is lower than 6°C, a boiling point that is above 30°C, a self-combustion temperature that is higher than 200 °C and a viscosity that is lower than 5 mPa.s.
  • the invention described herein among others applies to the removal of the hazardous substances benzene and ethanol.
  • the initial vapour temperature is between 11 °C and 30°C for benzene and between 9°C and 30°C for ethanol.
  • Benzene preferably is cooled down to a temperature above 6°C, or ethanol is cooled down to a temperature above 4°C. Water may be used as a cooling medium here.
  • Hazardous material condenses in the cooler and is passed to a reservoir. Residual vapour is passed to the inertising system, where an inert gas or an inert gas mixture is supplied. Before, during or after inertising, residual benzene or ethanol may be removed from the residual vapour by a filter system.
  • Inert gas and optionally gas purified from residual benzene or ethanol may be passed back into the tank.
  • the tank is heated using energy released in the cooling process.
  • Water, for instance bilge water, may be used here as heating medium. Recycling is repeated until a desirable level of benzene or ethanol has been reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treating Waste Gases (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention porte sur un procédé et sur un appareil pour retirer des matières dangereuses à partir d'un réservoir, dans lesquels une vapeur est amenée hors du réservoir et des matières dangereuses sont condensées et collectées. Un gaz inerte ou un mélange de gaz inertes est fourni à la vapeur résiduelle. Le mélange obtenu de gaz inertes et de vapeur résiduelle est chauffé et est renvoyé vers le réservoir. Le cycle est répété jusqu'à ce qu'un niveau souhaitable de matière dangereuse dans le réservoir ait été atteint. L'appareil comprend un tuyau (2) comportant une pompe (3), lequel tuyau est relié à un réservoir (1) et mène à un refroidisseur (4), à partir du refroidisseur (4) jusqu'à un système de mise à l'état inerte (13), à partir duquel la vapeur est envoyée vers le réservoir (1) par l'intermédiaire d'un système de chauffage (19), une matière dangereuse condensée à partir de la vapeur étant amenée hors du refroidisseur (4) par l'intermédiaire d'un tuyau (11) vers un réservoir (12).
PCT/NL2012/050452 2011-06-28 2012-06-27 Procédé et appareil pour nettoyer des réservoirs Ceased WO2013002637A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2007010 2011-06-28
NL2007010A NL2007010C2 (nl) 2011-06-28 2011-06-28 Werkwijze en inrichting voor de reiniging van tanks.

Publications (1)

Publication Number Publication Date
WO2013002637A1 true WO2013002637A1 (fr) 2013-01-03

Family

ID=46458591

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2012/050452 Ceased WO2013002637A1 (fr) 2011-06-28 2012-06-27 Procédé et appareil pour nettoyer des réservoirs

Country Status (2)

Country Link
NL (1) NL2007010C2 (fr)
WO (1) WO2013002637A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2553850C1 (ru) * 2014-02-26 2015-06-20 Закрытое Акционерное Общество "Независимая Энергетическая Компания" Установка для слива сжиженных углеводородных газов (суг) из вагона-цистерны, способ слива суг из вагона-цистерны с ее использованием, установка для дегазации вагона-цистерны, способ дегазации вагона-цистерны с ее использованием, а также способ слива и дегазации суг из вагона-цистерны с использованием этих установок
RU2585784C1 (ru) * 2015-02-10 2016-06-10 Общество с ограниченной ответственностью "Газпром нефть шельф" Способ мойки резервуаров для нефти, нефтепродуктов или опасных жидких сред и комплекс оборудования для его осуществления
CN105771300A (zh) * 2015-12-01 2016-07-20 北京明天和创科贸有限公司 一种油气回收系统
CN108993087A (zh) * 2018-08-24 2018-12-14 李利平 一种用于含苯尾气的苯回收装置
RU191626U1 (ru) * 2019-06-04 2019-08-14 Общество с ограниченной ответственностью "Инвестиции Строительство Менеджмент" Установка дегазации цистерн для перевозки жидкого аммиака
WO2024099528A1 (fr) * 2022-11-11 2024-05-16 A.P. Møller - Mærsk A/S Système de réglage de composition de gaz, procédé et utilisation associée

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213711A1 (de) * 1982-04-14 1983-10-27 Manfred Dr. 2104 Hamburg Nitsche Verfahren zur reinigung von behaeltern von brennbaren fluechtigen oder verdampfbaren stoffen
US5176002A (en) * 1991-04-10 1993-01-05 Process Systems International, Inc. Method of controlling vapor loss from containers of volatile chemicals
US20090183797A1 (en) * 2005-03-29 2009-07-23 Hilliard Emission Controls, Inc. Removing Volatile Vapors From A Storage Vessel
WO2010052020A1 (fr) 2008-11-07 2010-05-14 The European Innovation Group B.V. Procédé de nettoyage de cuves

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3213711A1 (de) * 1982-04-14 1983-10-27 Manfred Dr. 2104 Hamburg Nitsche Verfahren zur reinigung von behaeltern von brennbaren fluechtigen oder verdampfbaren stoffen
US5176002A (en) * 1991-04-10 1993-01-05 Process Systems International, Inc. Method of controlling vapor loss from containers of volatile chemicals
US20090183797A1 (en) * 2005-03-29 2009-07-23 Hilliard Emission Controls, Inc. Removing Volatile Vapors From A Storage Vessel
WO2010052020A1 (fr) 2008-11-07 2010-05-14 The European Innovation Group B.V. Procédé de nettoyage de cuves

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2553850C1 (ru) * 2014-02-26 2015-06-20 Закрытое Акционерное Общество "Независимая Энергетическая Компания" Установка для слива сжиженных углеводородных газов (суг) из вагона-цистерны, способ слива суг из вагона-цистерны с ее использованием, установка для дегазации вагона-цистерны, способ дегазации вагона-цистерны с ее использованием, а также способ слива и дегазации суг из вагона-цистерны с использованием этих установок
RU2585784C1 (ru) * 2015-02-10 2016-06-10 Общество с ограниченной ответственностью "Газпром нефть шельф" Способ мойки резервуаров для нефти, нефтепродуктов или опасных жидких сред и комплекс оборудования для его осуществления
CN105771300A (zh) * 2015-12-01 2016-07-20 北京明天和创科贸有限公司 一种油气回收系统
CN108993087A (zh) * 2018-08-24 2018-12-14 李利平 一种用于含苯尾气的苯回收装置
RU191626U1 (ru) * 2019-06-04 2019-08-14 Общество с ограниченной ответственностью "Инвестиции Строительство Менеджмент" Установка дегазации цистерн для перевозки жидкого аммиака
WO2024099528A1 (fr) * 2022-11-11 2024-05-16 A.P. Møller - Mærsk A/S Système de réglage de composition de gaz, procédé et utilisation associée

Also Published As

Publication number Publication date
NL2007010C2 (nl) 2013-01-03

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