EP0635440A1 - Procédé et dispositif pour réduire l'émission de polluants - Google Patents

Procédé et dispositif pour réduire l'émission de polluants Download PDF

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Publication number
EP0635440A1
EP0635440A1 EP94111379A EP94111379A EP0635440A1 EP 0635440 A1 EP0635440 A1 EP 0635440A1 EP 94111379 A EP94111379 A EP 94111379A EP 94111379 A EP94111379 A EP 94111379A EP 0635440 A1 EP0635440 A1 EP 0635440A1
Authority
EP
European Patent Office
Prior art keywords
sealing liquid
stored goods
tank
roof
arrangement according
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Withdrawn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
EP94111379A
Other languages
German (de)
English (en)
Inventor
Klaus-Dieter Dr.-Ing. Kaufmann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0635440A1 publication Critical patent/EP0635440A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B65D88/42—Large containers having floating covers, e.g. floating roofs or blankets with sealing means between cover rim and receptacle

Definitions

  • the invention relates generally to the field of keeping the air clean, and it relates in particular to a method and an arrangement for reducing pollutant emissions into the outside air during the storage of liquid stored goods in tanks with a level that is movable vertically within the respective tank and the level of the stored goods following roof.
  • Tanks with such a floating roof can be found today for the storage of liquid goods, in particular petrochemicals such. B. of mineral oil and mineral oil products in large scale application.
  • B. of mineral oil and mineral oil products in large scale application In these tanks, the edge gap between the outer circumference of the roof and the inner wall of the tank has been sealed up to now against the escape of stored goods with the aid of a device consisting of a lever linkage with counter loads, sliding plates and wiper strips.
  • the invention is therefore based on the object to show a way, while maintaining the structurally simple and economical tank construction with conventional floating roof, even without complex additional systems, the pollutant emissions can be kept as low as was previously only possible by the method of gas oscillation.
  • a relatively narrow area near the edge is basically created in the respective tank, in which the liquid stored goods are covered with a chemically compatible sealing liquid which has a lower density and a comparatively low vapor pressure. In this way, emission of pollutants is avoided both in liquid form and in gas or vapor form in the gap between the inner wall of the tank itself and the outer circumference of the roof moving therein.
  • a demand-dependent or continuous supply of sealing liquid and its preparation can further ensure that pollutants do not accumulate in the sealing liquid in an undesirably high concentration.
  • Sealing liquid drawn off in this context can either be used again for sealing after it has been cleaned, or it can be used in some other way as an energy source.
  • the illustration in the drawing shows a tank 1, which is used to store liquid storage goods 3.
  • a roof 4 floats, which is movable in the tank 1 in the vertical direction and can thus track changes in the filling height of the stored goods 3.
  • a relatively narrow marginal gap 6 remains between the inner wall 2 of the tank and the outer periphery 5 of the roof 4, which is filled with a sealing liquid 10 following the inner wall 2 of the tank 1.
  • a sealing liquid 10 following the inner wall 2 of the tank 1.
  • the edge gap 6 separated by a separating plate 23, which is connected to the roof 4 via an elastic coupling member 20, such as a bellows, and whose vertical movement takes place when the level of the stored goods 3 in the tank 1 rises or falls.
  • the chemical properties of the sealing liquid 10 are based on the stored goods 3 and are therefore compatible.
  • a distillate fraction of the stored goods 3 can be considered as sealing liquid 10.
  • the sealing liquid has a lower density than the stored goods 3 and its vapor pressure is low compared to that of the stored goods 3. Penetration of the stored goods 3 into the sealing liquid 10 can at least largely be avoided in this way and, moreover, there is no stronger one Evaporation from the sealing liquid 10.
  • the stored goods 3 are crude oil or mineral oil products, aliphatic hydrocarbons and in particular normal alkanes with six or more carbon atoms per molecule are suitable as sealing liquid 10.
  • Preferred examples are the alkanes from heptane to Tridecan and especially from Nonan to Undecan.
  • a sliding block 12 dips into the edge area filled with the sealing liquid 10, which is connected to the inner wall 2 of the tank 1 extends parallel to it and follows the movement of the roof 4 along the inner wall 2 of the tank 1. on its side facing the inner wall 2 of the tank 1, the sliding shoe 12 can carry scratches which serve to detach firmly adhering solid deposits from the inner wall 2 of the tank 1 and thus to create a residue-free wall surface from which no pollutant emissions are emitted.
  • a feed line 17 is used to fill the sealing liquid 10 into the edge gap 6, which branches off from a collecting line 7 arranged on the upper side of the roof 4 with a significantly larger cross section and can be filled therefrom with sealing liquid 10.
  • a discharge line 18 is provided in the edge gap 6, which dips into the sealing liquid 10 in the edge gap 6 and leads to a collecting line 8, which is also arranged on the roof 4 and again has a significantly larger cross section.
  • Detectors (not specifically shown) are then provided for this control in the drawing, which respond to changes in the properties of the sealing liquid 10 due to the absorption of foreign matter.
  • the instantaneous density or also its light transmission can serve as a control criterion for the exchange of the sealing liquid 10.
  • a gas collecting space 11 is provided above it along the inner wall 2 of the tank 1, which is delimited by a wall 21 which is connected to the cover 16 at its lower edge with the insertion of a seal 15 and one at its upper edge carries shoe-mounted seal 14, which bears against the inner wall 2 of the tank 1 and can slide along it when the gas collecting space 11 as a whole follows the movement of the roof 4 upwards or downwards.
  • the wall 21 of the gas collection chamber 11 also contains calibrated openings 13, through which the gas collection chamber 11 is specifically ventilated with outside air or fed with inert gas can be.
  • a solvent can be introduced into the gas collecting space 11 via the openings 13 in the wall 21, which allows detachment of adhering layers of residual material from the inner wall 2 of the tank 1 and can also have an elevated temperature or vapor form.
  • a suction line 19 leads into the gas collecting space 11, which leads to a collecting line 9 for gas arranged on the roof 4, which has a significantly larger cross section. Via the suction line 19, the content of the gas samel space 11 can be suctioned off and, if desired, an adjustable vacuum can be generated and maintained therein.
  • the task of the gas collecting space 11 is to prevent any residual liquid remaining in the outside space when the roof 4 is lowered in the tank 1 on its inner wall 2, regardless of the displacement of the liquid storage item 3 by the sealing liquid 10.
  • These liquid residues remaining approximately between the sliding block 12 and the inner wall 2 of the tank 1 evaporate in the gas collecting space 11 and are removed via the suction line 19 and the associated collecting line 9 and, if necessary, recovered or otherwise used.
  • An introduction of outside air or inert gas through the openings 13 ensures a reduction in the partial pressure of the liquid vapors in the gas collection chamber 11 and thus a complete evaporation of the liquid residues accumulated in the gas collection chamber 11.
  • the invention is initially embodied in a method for reducing pollutant emissions into the outside air during the storage of liquid stored goods in tanks with a roof that can move vertically within the respective tank and follows the fill level of the stored goods, in the area of the marginal gap between the External circumference of the roof and the inner wall of the tank provide precautionary measures against a passage of liquid can be made upward by filling the edge gap between the inner wall of the tank and the outer periphery of the roof with a sealing liquid which has a lower density than the stored goods and has a vapor pressure which is small compared to that of the stored goods.
  • an essentially closed atmosphere that can be selectively fed with outside air and / or with inert gas can then be created at the edge gap filled with sealing liquid, which atmosphere is kept under an adjustable negative pressure relative to the outside space and / or into which additionally heated gas and / or solvent vapor and in particular is created Steam of elevated temperature can be introduced.
  • the invention also relates to an arrangement for reducing pollutant emissions into the outside air during the storage of liquid stored goods in tanks with a roof that can move vertically within the respective tank and follows the fill level of the stored goods, between the inner wall of the tank and the outer circumference of the roof has an edge gap which is filled with a sealing liquid which has a lower density than the stored goods and has a vapor pressure which is small compared to that of the stored goods.
  • a gas collection space connected therewith can be provided at the edge gap, which is under adjustable negative pressure relative to the outside space and / or can be specifically ventilated with outside air and / or metered with inert gas via corresponding openings to the outside space.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Gas Separation By Absorption (AREA)
EP94111379A 1993-07-21 1994-07-21 Procédé et dispositif pour réduire l'émission de polluants Withdrawn EP0635440A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4324495 1993-07-21
DE4324495A DE4324495C2 (de) 1993-07-21 1993-07-21 Anordnung zum Verringern von Schadstoffemissionen

Publications (1)

Publication Number Publication Date
EP0635440A1 true EP0635440A1 (fr) 1995-01-25

Family

ID=6493379

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94111379A Withdrawn EP0635440A1 (fr) 1993-07-21 1994-07-21 Procédé et dispositif pour réduire l'émission de polluants

Country Status (3)

Country Link
US (1) US5529757A (fr)
EP (1) EP0635440A1 (fr)
DE (1) DE4324495C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025454A1 (fr) * 2006-08-31 2008-03-06 Heinrich Imhof Récipient rond vertical destiné à stocker des liquides, et dispositif comprenant plusieurs récipients

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5935276A (en) * 1997-07-29 1999-08-10 Texaco Inc Method of impeding the evaporation of a solvent and compositions useful therein
CN113428289A (zh) * 2021-06-29 2021-09-24 广船国际有限公司 一种甲醇燃料罐和船舶

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618812A (en) * 1969-06-27 1971-11-09 Pittsburgh Des Moines Steel Wax scraper for floating roof tanks
FR2162928A5 (en) * 1971-11-23 1973-07-20 Oemv Ag Floating decking - for oil storage tank with heating and scraping devices for wall deposits
FR2439727A1 (fr) * 1978-10-27 1980-05-23 Lecalve Frank Dispositif assurant l'etancheite d'un couvercle flottant de cuve, et maintenant cette etancheite, sans manipulations, malgre les variations de volume du liquide contenu dans la cuve
DE3014166A1 (de) * 1980-04-12 1981-10-22 Wintershall Ag, 3100 Celle Verfahren und vorrichtung zur lagerung sauerstoffempfindlicher produkte in tanks mit schwimmdecke
EP0067428A1 (fr) * 1981-06-13 1982-12-22 Forschungszentrum Jülich Gmbh Réservoir de grande dimension sans pression pour le stockage d'eau chaude
US5147418A (en) * 1991-12-19 1992-09-15 Chicago Bridge & Iron Technical Services Company Volatile liquid storage system
NL9100735A (nl) * 1991-04-26 1992-11-16 Stichting Inst Mech Middel voor het bedekken van een vloeibaar mengsel met vluchtige bestanddelen, zoals drijfmest.

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1998492U (fr) * Shell Int Research Maatschappij Nv
US1404924A (en) * 1921-05-31 1922-01-31 Parkersburg Rig & Reel Co Deck for oil tanks
US1906685A (en) * 1928-02-06 1933-05-02 John H Wiggins Storage tank for volatile gases and liquids
US1913643A (en) * 1929-02-13 1933-06-13 Western Pipe & Steel Co Floating deck for oil tanks
US2297985A (en) * 1939-04-08 1942-10-06 Rivers George Floating roof
US2541090A (en) * 1945-10-29 1951-02-13 Chicago Bridge & Iron Co Lifter roof
DE1715884U (de) * 1955-11-07 1956-01-26 Dortmunder Union Brueckenbau Dichtungsvorrichtung fuer schwimmdaecher von fluessigkeitsbehaeltern.
FR2252004A5 (fr) * 1973-11-16 1975-06-13 Inst Francais Du Petrole
US4099644A (en) * 1976-04-07 1978-07-11 United States Steel Corporation Low emission multiple sealing system for floating roof tanks
US4173291A (en) * 1978-01-20 1979-11-06 Pittsburgh-Des Moines Steel Company Floating roof seal
US4209271A (en) * 1978-08-10 1980-06-24 Chicago Bridge & Iron Company Storage tank with liquid insulator for storing cryogenic fluids using water displacement
DD210891A1 (de) * 1982-10-21 1984-06-27 Dresden Komplette Chemieanlag Vorrichtung zur anaeroben aufbereitung von abwaessern
FR2667375B1 (fr) * 1990-09-28 1993-12-24 Compania Fabricacion Contad Mate Dispositif d'etancheite a joint fluide.
US5284269A (en) * 1993-06-28 1994-02-08 Petrie Jack G Space saving double seal

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618812A (en) * 1969-06-27 1971-11-09 Pittsburgh Des Moines Steel Wax scraper for floating roof tanks
FR2162928A5 (en) * 1971-11-23 1973-07-20 Oemv Ag Floating decking - for oil storage tank with heating and scraping devices for wall deposits
FR2439727A1 (fr) * 1978-10-27 1980-05-23 Lecalve Frank Dispositif assurant l'etancheite d'un couvercle flottant de cuve, et maintenant cette etancheite, sans manipulations, malgre les variations de volume du liquide contenu dans la cuve
DE3014166A1 (de) * 1980-04-12 1981-10-22 Wintershall Ag, 3100 Celle Verfahren und vorrichtung zur lagerung sauerstoffempfindlicher produkte in tanks mit schwimmdecke
EP0067428A1 (fr) * 1981-06-13 1982-12-22 Forschungszentrum Jülich Gmbh Réservoir de grande dimension sans pression pour le stockage d'eau chaude
NL9100735A (nl) * 1991-04-26 1992-11-16 Stichting Inst Mech Middel voor het bedekken van een vloeibaar mengsel met vluchtige bestanddelen, zoals drijfmest.
US5147418A (en) * 1991-12-19 1992-09-15 Chicago Bridge & Iron Technical Services Company Volatile liquid storage system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025454A1 (fr) * 2006-08-31 2008-03-06 Heinrich Imhof Récipient rond vertical destiné à stocker des liquides, et dispositif comprenant plusieurs récipients
US8714207B2 (en) 2006-08-31 2014-05-06 Heinrich Imhof Vertical round container for storing liquids, and arrangement comprising a plurality of containers

Also Published As

Publication number Publication date
US5529757A (en) 1996-06-25
DE4324495A1 (de) 1995-01-26
DE4324495C2 (de) 1997-01-23

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