NO179317B - Apparatus and method for continuous emptying of liquid-filled tank - Google Patents
Apparatus and method for continuous emptying of liquid-filled tank Download PDFInfo
- Publication number
- NO179317B NO179317B NO942217A NO942217A NO179317B NO 179317 B NO179317 B NO 179317B NO 942217 A NO942217 A NO 942217A NO 942217 A NO942217 A NO 942217A NO 179317 B NO179317 B NO 179317B
- Authority
- NO
- Norway
- Prior art keywords
- liquid
- pilot
- tank
- tanks
- outlet
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims description 30
- 238000000034 method Methods 0.000 title claims description 8
- 238000007689 inspection Methods 0.000 claims description 3
- 238000004880 explosion Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 3
- 239000003209 petroleum derivative Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/02—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants
- B67D7/0238—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring liquids other than fuel or lubricants utilising compressed air or other gas acting directly or indirectly on liquids in storage containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
- B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
Oppfinnelsen angår anordning og fremgangsmåte for kontinuerlig tømming av tank fyllt med f.eks. kjemikalier, petroleumsprodukter eller andre væsker. The invention relates to a device and method for continuously emptying a tank filled with e.g. chemicals, petroleum products or other liquids.
I tanker der det ikke kan benyttes gjennomgående rørforbindelse i tankenes bunn, skjer vanligvis tømming ved hjelp av pumpe neddykket i tanken. Dette gjelder f.eks. ved tømming av tanker om bord i skip eller flytende installasjoner i forbindelse med oljeutvinning, samt ved tømming av tanker i industri eller andre sektorer, både under vanlige driftsforhold, og i forbindelse med skader, ulykker og andre hendelser. Tømming av tanker hvor det oppbevares f.eks. kjemikalier eller petroleumsprodukter er ofte forbundet med stor brann- og eksplosjonsfare, og dette stiller derfor store krav til eksplosjonssikkerhet ved utstyret som anvendes. Ved bruk av neddykkede pumper, som er det mest vanlige, stilles det svært store krav til pumpenes kvalitet, kontraksjon og beskaffenhet. Ved bruk av neddykkede pumper vil det være fare for varmgang, driftstans, samt eksplosjonsfare ved inn- og utmontering av pumpen og dens rør-/ledningsforbindelser. Følgene av branner eller eksplosjoner som følge av feil ved pumpeutstyret eller dets anvendelse kan ha katastrofale konsekvenser. Dersom det er behov for overhaling eller vedlikehold av en neddykket pumpe når den befinner seg i en tank, vil det ofte være enten umulig eller forbundet med svært store vanskeligheter å utføre arbeidet med dette i tanken, p.g.a. den betydelige brann- og eksplosjonsfare som er tilstede. In tanks where a continuous pipe connection cannot be used in the bottom of the tank, emptying usually takes place using a pump submerged in the tank. This applies, for example, to when emptying tanks on board ships or floating installations in connection with oil extraction, as well as when emptying tanks in industry or other sectors, both under normal operating conditions and in connection with damage, accidents and other incidents. Emptying of tanks where e.g. chemicals or petroleum products are often associated with a great risk of fire and explosion, and this therefore places great demands on the explosion safety of the equipment used. When using submerged pumps, which are the most common, very high demands are placed on the quality, contraction and nature of the pumps. When using submerged pumps, there will be a risk of overheating, stoppage of operation, as well as a risk of explosion when installing and removing the pump and its pipe/line connections. The consequences of fires or explosions as a result of faults in the pumping equipment or its use can have catastrophic consequences. If there is a need for overhaul or maintenance of a submerged pump when it is in a tank, it will often be either impossible or associated with very great difficulties to carry out the work with this in the tank, due to the significant risk of fire and explosion that is present.
Ved anordningen og fremgangsmåten ifølge oppfinnelsen unngår man bruk av neddykkede pumper, noe som øker driftsikkerheten ved tømming av væskefylte tanker. I tillegg reduseres brann- og eksplosjonsfare; og kostnadsmessig byr fremgangsmåten ifølge oppfinnelsen på vesentlige fordeler, idet pumpeutstyret som anvendes ifølge oppfinnelsen blir rimeligere enn ifølge tidligere kjent teknikk. The device and method according to the invention avoids the use of submerged pumps, which increases operational reliability when emptying liquid-filled tanks. In addition, the risk of fire and explosion is reduced; and in terms of cost, the method according to the invention offers significant advantages, as the pumping equipment used according to the invention becomes less expensive than according to prior art.
Dette oppnås ifølge anordningen og fremgangsmåten ved at idet innvendig eller utvendig i eller ved tanken 1 som skal tømmes monteres to eller flere pilottanker 2. Pilottankenes 2 størrelse, utforming og volum tilpasses ønsket tømmerate for tanken som skal tømmes. I pilottankenes 2 bunn er anbrakt innløp 3 for væsken som skal fylles i pilottanken. Innløpets 3 bunn er forsynt med enveis klappventil 4. Nær pilottankens 2 bunn er ytterligere anbrakt rørforbindelse 5 for tømming av pilottanken. Nevnte rørforbindelse er forbundet med en eller flere tilsvarende rørforbindelser 5 fra andre pilottanker 2 der dette er ønskelig, som igjen er tilkoplet et tømmerør 6 via en eller flere ventiler 7, for valg av pilottank 2 hvorfra tømming skal skje. Ventilen 7 forhindrer ytterligere at utstrømmende væske fra en pilottank 2 overføres til en eller flere andre pilottanker 2. This is achieved according to the device and method by mounting two or more pilot tanks 2 inside or outside in or near the tank 1 to be emptied. The size, design and volume of the pilot tanks 2 are adapted to the desired logging rate for the tank to be emptied. In the bottom of the pilot tanks 2, there is an inlet 3 for the liquid to be filled in the pilot tank. The bottom of the inlet 3 is equipped with a one-way flap valve 4. Near the bottom of the pilot tank 2, a further pipe connection 5 is placed for emptying the pilot tank. Said pipe connection is connected to one or more corresponding pipe connections 5 from other pilot tanks 2 where this is desired, which in turn is connected to an emptying pipe 6 via one or more valves 7, for selecting the pilot tank 2 from which emptying is to take place. The valve 7 further prevents liquid flowing from a pilot tank 2 being transferred to one or more other pilot tanks 2.
Ytterligere er pilottanken 2 forsynt med inspeksjonsluke 9 forsynt med hurtiglukkingsmekanisme, gjennom hvilken vedlikehold, renhold og inspeksjon kan finne sted. Furthermore, the pilot tank 2 is provided with an inspection hatch 9 provided with a quick-closing mechanism, through which maintenance, cleaning and inspection can take place.
I pilottankens 2 topp er anbrakt rør 8 for tilkopling til gass- eller vakumpumpe 10, med henblikk på regulering av trykk eller våkum, for styring av tømming eller fylling av væske i pilottanken 2. In the top of the pilot tank 2, pipe 8 is placed for connection to gas or vacuum pump 10, for the purpose of regulating pressure or vacuum, for controlling the emptying or filling of liquid in the pilot tank 2.
For å kontrollere trykk, og derved væskenivå i pilottankene 2, anordnes vakumpumpe 10 eller ejektor, tilkoplet pilottankene via rørforbindelser 8. Hver pilottank 2 kan enten være forsynt med separat pumpe eller ejektor 10, eller dette kan være felles for flere tanker. Luft eller gass hentes fra innløp 13. In order to control pressure, and thereby the liquid level in the pilot tanks 2, a vacuum pump 10 or ejector is arranged, connected to the pilot tanks via pipe connections 8. Each pilot tank 2 can either be provided with a separate pump or ejector 10, or this can be shared by several tanks. Air or gas is taken from inlet 13.
Pilottankenes 2 innvendige trykk- og væskenivå kontrolleres ved operasjons- og styreenheter 11, enten manuelt eller automatisk, tilkoplet en eller flere vakumpumper eller ejektorer 10. Utslipp av luft eller gass fra pilottankene 2, som oppstår under drift, kan enten gå til friluft, eller pumpes tilbake til tanken, via utløp 14. The internal pressure and liquid level of the pilot tanks 2 are controlled by operating and control units 11, either manually or automatically, connected to one or more vacuum pumps or ejectors 10. Emissions of air or gas from the pilot tanks 2, which occur during operation, can either go to the open air, or is pumped back to the tank, via outlet 14.
I noen tilfeller vil det under tømming av tankene 1 være relativt betydelig mottrykk i tømmerøret 6, og det kan derfor være nødvendig å anordne en trykkforøkelsespumpe 12 i tømmerøret 6, fortrinnsvis utenfor tanken, med henblikk på å redusere brann- eller eksplosjonsfare, samt forenkle vedlikehold og reparasjoner av trykkforøkelsepumpen 12. Ved tømming av tanken 1, vil fremgangsmåten være basert på at pilottankene 2, som enten er plassert inne i tanken, eller som er forbundet til tanken 1 via egnede rørforbindelser; bli fylt opp av det statiske væsketrykk som finnes ved tankens bunn. Luft eller gass inne i pilottankene 2 unnslipper via rørforbindelser 8 - til utløp 14. In some cases, during emptying of the tanks 1, there will be relatively significant back pressure in the emptying pipe 6, and it may therefore be necessary to arrange a pressure increase pump 12 in the emptying pipe 6, preferably outside the tank, with a view to reducing the risk of fire or explosion, as well as simplifying maintenance and repairs of the pressure increase pump 12. When emptying the tank 1, the procedure will be based on the pilot tanks 2, which are either placed inside the tank, or which are connected to the tank 1 via suitable pipe connections; be filled up by the static liquid pressure found at the bottom of the tank. Air or gas inside the pilot tanks 2 escapes via pipe connections 8 - to outlet 14.
Når tømming av tanken 1 skal finne sted, settes en av pilottankene 2 under trykk ved hjelp av utløp 15 via vakumpumpe 10 eller ejektorpumpe 10 via rørforbindelser 8. Væsken trykkes derved ut gjennom rørforbindelser 5 og tømmmerør 6, eventuelt via trykkforøkelsespumpe 12. Trykkforøkelsespumpe 12 kan f.eks. være nødvendig der høydeforskjellen fra tank til utløp 15 er stort, eller at det finnes mottrykk ved det punkt væsken skal tømmes. Når pilottanken 2 er tømt for væske, reduseres igjen gasstrykket inne i pilottanken 2 ved hjelp av vakumpumper eller ejektor 10, og pilottanken 2 fylles derved igjen opp ved at væske strømmer inn fra tanken 1 via rør 3. When emptying the tank 1 is to take place, one of the pilot tanks 2 is put under pressure by means of outlet 15 via vacuum pump 10 or ejector pump 10 via pipe connections 8. The liquid is thereby pushed out through pipe connections 5 and log pipe 6, possibly via pressure increase pump 12. Pressure increase pump 12 can e.g. be necessary where the height difference from tank to outlet 15 is large, or that there is back pressure at the point where the liquid is to be emptied. When the pilot tank 2 is emptied of liquid, the gas pressure inside the pilot tank 2 is reduced again by means of vacuum pumps or ejector 10, and the pilot tank 2 is thereby filled up again by liquid flowing in from the tank 1 via pipe 3.
Ved å kople to eller flere pilottanker 2 sammen i ett anlegg, og anordne en eller flere ventiler 7 ved rørforbindelsen og tømmerøret, oppnår man at tømmingen kan skje kontinuerlig, ved at pilottankene 2 tømmes og fylles i ulike faser. Ventilene 16 i rørene 8 for væskestrøm, eller i forbindelsen til vakumpumpen eller ejektoren 10 vil via styreenhet 11 sørge for ønsket åpning eller stengning, for egnet regulering. By connecting two or more pilot tanks 2 together in one plant, and arranging one or more valves 7 at the pipe connection and the discharge pipe, it is achieved that the emptying can take place continuously, by the pilot tanks 2 being emptied and filled in different phases. The valves 16 in the pipes 8 for liquid flow, or in the connection to the vacuum pump or the ejector 10, will via the control unit 11 ensure the desired opening or closing, for suitable regulation.
Claims (4)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO942217A NO179317C (en) | 1994-06-13 | 1994-06-13 | Apparatus and method for continuous emptying of liquid-filled tank |
PCT/NO1995/000100 WO1995034464A1 (en) | 1994-06-13 | 1995-06-13 | Apparatus and method for continuous evacuation of tanks filled with fluids |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO942217A NO179317C (en) | 1994-06-13 | 1994-06-13 | Apparatus and method for continuous emptying of liquid-filled tank |
Publications (4)
Publication Number | Publication Date |
---|---|
NO942217D0 NO942217D0 (en) | 1994-06-13 |
NO942217L NO942217L (en) | 1995-12-14 |
NO179317B true NO179317B (en) | 1996-06-10 |
NO179317C NO179317C (en) | 1996-09-18 |
Family
ID=19897178
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO942217A NO179317C (en) | 1994-06-13 | 1994-06-13 | Apparatus and method for continuous emptying of liquid-filled tank |
Country Status (2)
Country | Link |
---|---|
NO (1) | NO179317C (en) |
WO (1) | WO1995034464A1 (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO147869C (en) * | 1981-02-02 | 1983-06-29 | Patents & Dev As | PROCEDURE AND SYSTEM FOR EMPTYING A LIQUID MEDIUM FROM A CONTAINER, FOR EXAMPLE A SHIP TANK |
NO160766C (en) * | 1982-09-21 | 1991-12-24 | Thune Eureka As | STRIP SYSTEM FOR A LOAD TANK. |
-
1994
- 1994-06-13 NO NO942217A patent/NO179317C/en not_active IP Right Cessation
-
1995
- 1995-06-13 WO PCT/NO1995/000100 patent/WO1995034464A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO1995034464A1 (en) | 1995-12-21 |
NO179317C (en) | 1996-09-18 |
NO942217L (en) | 1995-12-14 |
NO942217D0 (en) | 1994-06-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM1K | Lapsed by not paying the annual fees |
Free format text: LAPSED IN DECEMBER 2000 |