EP0132197A2 - Prozess und Vorrichtung zum Reinigen von einem mit Öl verschmutzten Tank - Google Patents

Prozess und Vorrichtung zum Reinigen von einem mit Öl verschmutzten Tank Download PDF

Info

Publication number
EP0132197A2
EP0132197A2 EP84401462A EP84401462A EP0132197A2 EP 0132197 A2 EP0132197 A2 EP 0132197A2 EP 84401462 A EP84401462 A EP 84401462A EP 84401462 A EP84401462 A EP 84401462A EP 0132197 A2 EP0132197 A2 EP 0132197A2
Authority
EP
European Patent Office
Prior art keywords
tank
compartment
sludge
fluidized
oil
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Withdrawn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
EP84401462A
Other languages
English (en)
French (fr)
Other versions
EP0132197A3 (de
Inventor
Joseph L. Williams
John W. Sansing
Michael E. Hayes
James F. Deal
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.)
Petroleum Fermentations NV
Original Assignee
Petroleum Fermentations NV
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 Petroleum Fermentations NV filed Critical Petroleum Fermentations NV
Publication of EP0132197A2 publication Critical patent/EP0132197A2/de
Publication of EP0132197A3 publication Critical patent/EP0132197A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B57/00—Tank or cargo hold cleaning specially adapted for vessels
    • B63B57/02—Tank or cargo hold cleaning specially adapted for vessels by washing
    • 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

  • This invention relates to an apparatus and process for cleaning an oil contaminated vessel having one or more cargo compartments each containing sludge utilizing a closed fluidized circuit.
  • Vessels containing oil such as storage tanks, tank cars, oceangoing tankers, barges, pipelines or other structures for storing or transporting crude oil or petroleum products will over a period of time accumulate large amounts of sludge made up of chemical or hydrocarbon deposits which deposits occur particularly in crude oils or heavy oils. Build up of such sludge over a period of time subtracts from the load carrying or storage capacity of the vessel. Further build up of sludge in oil conveying vessels such as tank cars or trucks results in carrying excess dead weight when the vessel is returned empty from a delivery point to a shipping point thus increasing cost of operations. Consequently the interiors of such vessels must be cleaned from time to time of accumulation of sludge.
  • a process for cleaning an oil contaminated vessel involves use of a closed recirculating fluidized system or circuit where the system has a tank, a discharge means extending from the interior of a compartment within the vessel to the tank and a pressurized spray means extending from the tank to the interior of the compartment by which the contents of the tank may be sprayed onto the interior walls of the compartment.
  • the process involves the steps of treating the sludge with a fluidizing agent to form a pool of fluidized sludge which is then circulated through the system and sprayed under pressure onto the interior walls of the compartment.
  • the fluidized sludge spray When the fluidized sludge spray contacts the walls it cleans oil from the walls and also fluidizes any sludge thereon to increase the size of the pool in the bottom of the compartment containing fluidized sludge. This fluidized sludge is then discharged from the vessel to the tank where it is recirculated again through the pressurized spray means back to the compartment. This recirculation is continued until the compartment is substantially cleansed of sludge leaving only a film of self emulsifiable oil.
  • the fluidizing agent may be initially added directly to the compartment to form an initial pool of fluidized sludge which is then conveyed to the tank or the agent may be added directly to the tank after which it is circulated through the pressurized spray means onto the interior side walls of the compartment so as to form a pool of fluidized sludge.
  • the fluidized sludge is heated conveniently by a heat exchanger in the tank to further enhance the cleaning action.
  • the tank itself may act as a settling tank to capture any large solids such as rust or sand particles to prevent their being recirculated in the closed system through the pressurized spray means.
  • Sufficient fluidizing agent is periodically added to the system, either directly to the tank or to the compartment being cleaned, to maintain fluidity of the sludge.
  • the process may include the further step of periodically removing excess oil from the closed system and transferring it to a holding tank.
  • the remaining film of self emulsifiable oil left in the compartment after being sprayed with the fluidized sludge may then be completely removed by rinsing with a small amount of hot or cold water using a standard spray type Butterworth wash system.
  • the rinse water is then stripped from the compartment and transferred to a separating tank where oil is allowed to separate from the water.
  • the recovered oil may then be used as a fuel or reclaimed for refining and the rinse water may be drawn off and used in subsequent rinsing. By this procedure use of rinse water is minimized while at the same time oil is recovered.
  • the process described above may use water as a component of a wash solution when the vessel being cleaned contains low grade oil or crude oil sludge.
  • the sludge itself may contain from 0 to 40% water as a water in oil emulsion.
  • the fluidizing agent serves to invert the emulsion to form an oil in water emulsion having much better flow characteristics.
  • #6 oil normally does not contain any water such that the fluidized oil recovered will be water free when vessels containing such oil are cleaned.
  • the process described above is also applicable for use in cleaning vessels having a plurality of compartments each containing sludge.
  • fluidized sludge from the first compartment cleansed is sprayed into a second or further compartment to form an initial pool of fluidized sludge in the second compartment which is then recirculated through the closed fluidized system until the second compartment is substantially cleansed of sludge.
  • An apparatus constructed according to our invention comprises broadly a tank adapted to hold the fluidized sludge or emulsion, a pressurized spray means extending from the tank and adapted to extend into the interior of a compartment containing sludge and a discharge means having one end connected to-the tank and an opposite end adapted to be connected to the compartment to remove fluidized sludge or emulsion therefrom to the tank.
  • the pressurized spray means preferably includes a first pump and the discharge means a second pump with both pumps being of equal capacity and driven by a common drive means to assure that both operate with equal throughput.
  • the pumps, drive means and tank are mounted on a common base such as a skid to form a unit which can be conveniently lifted into position, as for example onto the deck of a barge, in order to clean cargo compartments.
  • the tank preferably has a vertical baffle therein dividing the tank into a solids settling portion and into a substantially solids free portion connected to the pressurized spray means.
  • the apparatus also preferably may include a separating tank in which excess oil or emulsion may be transferred from the closed fluidized circuit. Oil is allowed to separate from the emulsion in the separating tank where it is then removed for further use while the remaining water is available for further use.
  • FIG. 1 there is illustrated a vessel in the form of an oil tanker 1 having a plurality of cargo compartments 2, 3, 4 and 5 accessible by hatches 6.
  • the apparatus comprises a tank 20, a discharge means 21 having one end 22 connected to the tank 20 and an opposite end 23, shown in Figure 1, adapted to extend into a pool 24 of fluidized sludge in a compartment in order to discharge fluidized sludge or an emulsion from the compartment into the tank 20.
  • the apparatus 10 also includes a pressurized spray means 25 terminating in a spray head or nozzle 26 adapted to extend into a compartment in order that fluidized sludge or emulsion contained in the tank 20 may be sprayed under pressure onto the interior side walls and bottom of a compartment to clean the same of sludge.
  • the pressurized spray means 25 includes a first pump 30 to convey emulsion under pressure to the nozzle 26. If desired, filter means 31 may be included in the pressurized spray means to catch and filter any debris that might clog the nozzle 26.
  • the discharge means 21 includes a second pump 32 the intake of which is adapted to communicate with a compartment and the outlet of which extends to the.tank 20.
  • Pumps 30 and 32 are of equal capacity and are preferably driven by a common drive means 36 in the form of an internal combustion engine or electric motor.
  • the pumps are coupled through independent transmissions so that they may be operated independently or at the same speed and throughput.
  • the tank 20, pumps 30 and 32 as well as the common drive means 36 are mounted on a base or skid 38 so that the several parts making up the apparatus may be considered as a unit which may be easily lifted onto the deck or other portion of a vessel to be cleaned.
  • the tank 20 besides acting as a holding tank also acts as a settling tank to entrap large solids, such as sand or rust particles, that may be circulated within the tank.
  • a vertically extending baffle 40 extends upwardly from the bottom of the tank about three quarters of the height of the tank to divide the tank into a solids settling portion 41 and a solids free portion 42.
  • the end 22 of the discharge means 21 discharges into the top of the solids settling portion 41 while the intake of the pump 30 draws from the bottom of the solids free portion 42 which further minimizes likelihood of solids being drawn into the pump 30.
  • a heat transfer means in the form of coils 45 are contained in the tank 20 to heat the circulated emulsion to further enhance cleaning action.
  • the coils may be connected by piping to a boiler, not shown, contained at a convenient location, as for example an on-shore site, which heats a heat transfer fluid, for example steam, which is circulated through the coils. While the coils are shown in the solids settling portion of the tank, they could be located in any portion of the closed fluidized system defined by the discharge means 21, the tank 20 and the pressurized spray means 25.
  • the apparatus preferably also has a separating tank 50 sited on shore to which excess oil or emulsion is drawn by a pump 51 through a discharge conduit 52 which as shown extends into the pool of fluidized sludge 24.
  • the conduit 52 could just as conveniently extend to the tank 20 or other portion of the closed fluidized system to withdraw excess oil or emulsion therefrom. Oil is spearated out of the emulsion in the separating tank 50 where it may be removed for further use, as for example, a fuel. The remaining water is then available to be returned by conduit 52 to a holding tank not shown, where it is available for subsequent rinsing of a compartment cleaned of sludge.
  • the spray head or nozzle 26 preferably comprises a jet nozzle and may be of the portable type such as a Gunclean 270 A manufactured by Salen and Wicander Marin AB, Gothenburg, Sweden.
  • the nozzle is further preferably programmable and driven by air so as to move through predetermined arcs both in vertical planes and in horizontal planes to assure that a jet of fluidized sludge or emulsion will contact those areas of a compartment to be cleaned.
  • the nozzle is programmed such that the jet of emulsion will not contact top interior surfaces of the vessel.
  • the tank 20 has a capacity of approximately 250 gallons and pump pressure is on the order of 100-150 psig.
  • the pumps themselves may be of a progressive cavity type as manufactured by Moyno Products, Robbins & Myers, Inc., Springfield, Ohio.
  • the emulsifying agent will fluidize some of the sludge in the tank so as to form a pool of fluidized sludge.
  • the sludge becomes fluidized, it is conveyed to the tank 20 by the pump 32 where it can be heated and the fluidized sludge or emulsion (in the case of crude oil) is then circulated through the tank 20 into the pressurized spray means and onto the walls of the compartment.
  • This recirculation of fluidized sludge or emulsion is continued until the compartment walls have been cleansed of sludge and all of the sludge in the bottom of the compartment has been fluidized.
  • a small amount of the fluidized sludge or emulsion from compartment 2 may be used as a beginning pool of fluidized sludge for the next adjacent compartment 3 to be cleaned. This is accomplished by leaving the end 23 of the discharge means in the pool 24 of compartment 2 until the nozzle 26 has sprayed sufficient fluidized sludge or emulsion onto the walls of compartment 3 to form a pool of fluidized sludge in that compartment after which the end 23 is moved to the pool in compartment 3 such that fluidized sludge or emulsion from that compartment is then recirculated through the closed fluidizing system. This procedure is repeated for cleaning the remaining compartments.
  • Portions of the walls of a compartment may be masked or shaded by interior structure from impingement by the spray from the nozzle 26. These untouched portions may be cleaned by a hand-held spray from the deck or by someone entering the compartment to spray the fluidizing agent directly onto the untouched areas followed by washing with a hand-held water hose.
  • the compartment after cleaning is then rinsed with cold water using Butterworth nozzles for approximately fifteen to thirty minutes to form an oil water emulsion.
  • This emulsion is continuously removed from the compartment during rinsing and trasferred to a holding tank, not shown.
  • An oil layer will form on the surface within the holding tank after a few hours and the rinse water may be decanted from the bottom of the tank and recycled for future rinsing.
  • Emulsifying agents suitable for use in the described process are of the types disclosed in United States Patent No.4,276,094 and those sold by Petroferm U.S.A., Amelia Island, Florida No.'s PFC-2209, PFC-0247 or PFC-775.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Processing Of Solid Wastes (AREA)
EP84401462A 1983-07-11 1984-07-10 Prozess und Vorrichtung zum Reinigen von einem mit Öl verschmutzten Tank Withdrawn EP0132197A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US51248983A 1983-07-11 1983-07-11
US512489 1983-07-11

Publications (2)

Publication Number Publication Date
EP0132197A2 true EP0132197A2 (de) 1985-01-23
EP0132197A3 EP0132197A3 (de) 1985-07-10

Family

ID=24039320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401462A Withdrawn EP0132197A3 (de) 1983-07-11 1984-07-10 Prozess und Vorrichtung zum Reinigen von einem mit Öl verschmutzten Tank

Country Status (13)

Country Link
EP (1) EP0132197A3 (de)
JP (1) JPS6084193A (de)
KR (1) KR890000090B1 (de)
AU (1) AU3031484A (de)
BR (1) BR8403430A (de)
CA (1) CA1262330C (de)
DK (1) DK337984A (de)
ES (1) ES534169A0 (de)
GR (1) GR82396B (de)
IL (1) IL72366A0 (de)
NO (1) NO842792L (de)
PT (1) PT78880B (de)
ZA (1) ZA845272B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993018864A1 (en) * 1992-03-17 1993-09-30 Toftejorg Technology Aps Method and apparatus for cleaning an oil tank
FR2690857A1 (fr) * 1992-05-06 1993-11-12 Claude Marcel Dispositif pour nettoyer les cuves à fioul et à gazole.
CN104928698A (zh) * 2015-05-11 2015-09-23 青岛亿民九洲清洗有限公司 一种船舶管道雾化清洗设备及清洗工艺

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000063242A (ko) * 2000-06-01 2000-11-06 조래웅 산업폐기물을 이용한 블록의 제조방법

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB350850A (en) * 1930-09-22 1931-06-18 Butterworth System Inc An improved method of and apparatus for cleaning tanks such as the cargo tanks of oil transporting vessels
GB951618A (en) * 1960-05-06 1964-03-11 Polycell Prod Ltd Improvements relating to the cleaning of the surfaces of oil tanks and other oil contaminated surfaces
GB915533A (en) * 1960-05-13 1963-01-16 John Alexander Christensen A method and apparatus for cleaning oil containing tanks
NL290674A (de) * 1962-03-27
JPS5314770B2 (de) * 1972-07-03 1978-05-19
JPS4939270A (de) * 1972-08-23 1974-04-12
JPS5491863A (en) * 1977-12-28 1979-07-20 Ebara Corp Method and device for crude oil sludge removal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993018864A1 (en) * 1992-03-17 1993-09-30 Toftejorg Technology Aps Method and apparatus for cleaning an oil tank
FR2690857A1 (fr) * 1992-05-06 1993-11-12 Claude Marcel Dispositif pour nettoyer les cuves à fioul et à gazole.
CN104928698A (zh) * 2015-05-11 2015-09-23 青岛亿民九洲清洗有限公司 一种船舶管道雾化清洗设备及清洗工艺

Also Published As

Publication number Publication date
CA1262330A (en) 1989-10-17
JPS6084193A (ja) 1985-05-13
DK337984D0 (da) 1984-07-10
IL72366A0 (en) 1984-11-30
GR82396B (de) 1984-12-13
ZA845272B (en) 1985-02-27
AU3031484A (en) 1985-01-17
KR850001106A (ko) 1985-03-16
PT78880B (en) 1986-07-14
EP0132197A3 (de) 1985-07-10
DK337984A (da) 1985-01-12
KR890000090B1 (ko) 1989-03-07
ES8602452A1 (es) 1985-12-01
PT78880A (en) 1984-08-01
CA1262330C (en) 1989-10-17
ES534169A0 (es) 1985-12-01
BR8403430A (pt) 1985-06-25
NO842792L (no) 1985-01-14

Similar Documents

Publication Publication Date Title
US4592786A (en) Process for cleaning an oil contaminated vessel
US4530131A (en) Automatic vacuum recyclable system for chemical-thermo cleaning of ship tanks and bilges
US4744379A (en) Conveyor system for washing apparatus
US4770711A (en) Method for cleaning chemical sludge deposits of oil storage tanks
EP0634958B1 (de) Verfahren und vorrichtung zur reinigung eines öltanks
US6858090B2 (en) Closed loop cleaning system
US4469143A (en) Tank truck purging system
US3436263A (en) Method of cleaning large storage tanks for petroleum products
EP2303475B1 (de) Reinigungsverfahren und -vorrichtung für lagerungstank
US1806740A (en) A cobfoba
KR20140048264A (ko) 이동식 수 처리 및 수지 이송 허브
EP0132197A2 (de) Prozess und Vorrichtung zum Reinigen von einem mit Öl verschmutzten Tank
USRE19374E (en) Method of cleaning
JP3818583B2 (ja) 塗装の前処理洗浄装置
WO1993020957A1 (en) Method for cleaning tanker cargo tanks
RU2314882C2 (ru) Способ очистки резервуара от донных отложений и устройство для его осуществления
US3067069A (en) Removal of liquid hydrocarbons from empty compartments of ocean-going tankers
JPH07505595A (ja) 車両の自動洗浄方法
WO2003059540A1 (en) 'dada' - fuel tank washer
US12053808B2 (en) Multi-phase storage vessel cleaning and maintenance system and method of use
US5624502A (en) Method of cleaning boats that have been contaminated with oil and gas well drilling fluids and hazardous waste
JPH08140916A (ja) 弁当箱洗浄装置
FR2678848A1 (fr) Installation de nettoyage de pieces industrielles.
US20240390957A1 (en) Multi-phase storage vessel cleaning and maintenance system, and method of use
JP2726234B2 (ja) 機械部品の洗浄装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): BE DE FR GB IT NL SE

17P Request for examination filed

Effective date: 19860110

17Q First examination report despatched

Effective date: 19861006

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19870131

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HAYES, MICHAEL E.

Inventor name: SANSING, JOHN W.

Inventor name: WILLIAMS, JOSEPH L.

Inventor name: DEAL, JAMES F.