Classifications

• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F11/00—Treatment of sludge; Devices therefor
  • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D1/00—Evaporating
  • B01D1/16—Evaporating by spraying
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D1/00—Evaporating
  • B01D1/28—Evaporating with vapour compression
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
  • B01D3/06—Flash distillation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
  • B09B—DISPOSAL OF SOLID WASTE
  • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
  • B09B—DISPOSAL OF SOLID WASTE
  • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
  • B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
  • B09C—RECLAMATION OF CONTAMINATED SOIL
  • B09C1/00—Reclamation of contaminated soil
  • B09C1/06—Reclamation of contaminated soil thermally
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
  • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
  • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
  • B63B17/06—Refuse discharge, e.g. for ash
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F11/00—Treatment of sludge; Devices therefor
  • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
  • C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
  • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
  • C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
  • C10G7/00—Distillation of hydrocarbon oils
  • C10G7/04—Dewatering
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/02—Treatment of water, waste water, or sewage by heating
  • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2101/00—Nature of the contaminant
  • C02F2101/30—Organic compounds
  • C02F2101/32—Hydrocarbons, e.g. oil
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
  • C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/02—Temperature
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2209/00—Controlling or monitoring parameters in water treatment
  • C02F2209/03—Pressure

Definitions

• the invention relates to a plant for purification of oil sludge containing water, said plant comprising one or more nozzles for injecting oil sludge into a receptacle, means for changing the pressure within the receptacle to the effect that water can be separated off the oil sludge by distillation at different temperatures, means for heating the oil sludge containing water.
• the purification that takes place before the oil is used in the engine may take place by means of a variety of filters, but most often the purification takes place by means of a centrifuge expelling the impurities (ie the heavy parts, including also water) in the form of oil sludge. It is forbidden to discharge that oil sludge into the harbours and consequently it must be deposited either ashore or burnt onboard the vessel.
• boilers oil firing equipment
• the oil sludge produced by a centrifuge has a typical water content of about 50%, which is too high for the sludge as such to be burnt on/in a typical boiler, and therefore a further purification of the oil sludge is most often required.
• Salts are known for their great and fatal impacts on ships' engines and it is consequently an aim to prevent them from being present in the fuel.
• US patent disclosure No. 4,757,618 teaches a system consisting of a boiler and a vacuum-based distillation system used for the purification of the oil sludge.
• the system functions in that the vacuum-distillation system purifies the oil to such extent that the purified oil can be burnt off on the ship's boiler.
• the invention also relates to a method of purifying oil sludge as featured in claims 9-11.
• the invention also relates to a vessel as featured in claims 12-13.
• Advantageous embodiments will appear from dependent claims.
• Figure 1 is a diagrammatical process diagram of a system for purification of oil sludge.
• FIG. 1 showing a plant for the purification of oil sludge containing water, and it shows an embodiment of the plant according to the invention.
• the plant comprises a container 2 with means for changing the atmospheric pressure to the effect that water can be separated off the oil sludge by distillation at different temperatures; and means for heating the oil sludge containing water to the effect that water is distilled off the oil sludge.
• the plant further comprises means 9 for mechanical removal of particles from the oil sludge, from which water was removed by distillation.
• FIG. 1 a plant in accordance with the invention is shown schematically.
• the plant comprises a sludge receptacle 11 for containing the oil sludge which is separated from the fuel to a ship.
• the sludge receptacle 11 also serves the purpose of collecting oil-containing water.
• a suction filter which may be eg 100 ⁇ m.
• the sludge can be heated in eg a heat exchanger 7, before it is injected into the container 2 (the evaporation tank), wherein a sub-atmospheric pressure preferably prevails, whereby water is distilled off the oil when the oil is injected into the container 2.
• the sludge is discharged in batches, each batch being recycled by means of the circulation pump 6 through the pre-heater 7, until water is removed from the oil to a sufficient extent.
• a method of measuring the water content of the recycled sludge is by measuring the temperature by two temperature sensors (not shown) arranged at eg the circulation pump 6 and the pre-heater 7, respectively. When the temperature at the circulation pump 6 approaches the temperature prevailing at the pre-heater 7 it is thus a sign that no further evaporation (distillation) of water from the sludge in the containers 2 is taking place, following which the batch is conveyed to a (not shown) buffer container prior to being injected into the ship's engine.
• Steps 1 and on are subsequently repeated.
• the injection may moreover be controlled by a measured pressure, meaning that sludge is injected only when the pressure within the container 2 is (has dropped) below a predetermined threshold.
• the sub-atmospheric pressure in the container 2 is formed by means of a pump 4 (a vacuum pump) which draws the water vapour out of the container 2.
• a pump 4 a vacuum pump
• the sub-atmospheric pressure in the container is accomplished by air/water vapour (ie gas) being discharged from the container top, and the pressure can eg be maintained (controlled) by means of suitable numbers of revolutions for a centrifugal pump or by means of (pressure) valves arranged in/on the container 2.
• the water vapour drawn out of the container 2 is conveyed to a storage tank 12 (clean bilge tank), from where it can be led overboard at a later stage.
• a storage tank 12 clean bilge tank
• the water can either be purified once again by means of the container 2 (with not shown circulation equipment) or it can be conveyed through a filter which preferably consists of loofa sponges.
• the purified oil sludge is taken from the container 2 via a filter 9, before it is taken towards a buffer tank (which is not shown).
• the purified oil sludge can be injected into the fuel supply of the vessel in such concentration that any remaining salts, solid matter, metals or water do not exceed the values fixed in eg specifications.
• the oil sludge can be injected into the fuel supply of the vessel in such concentration that the specifications (for the fuel or the engine) are observed, while the injection still takes place in a yet lower concentration.
• the injection of the purified oil sludge takes place continuously, but, of course, it may be necessary to control the injection of the purified oil sludge into the ship's engine to the effect that it takes place in a precisely controlled concentration depending on the result of a continuous analysis performed on the oil sludge.
• the amount of purified sludge is, according to a further embodiment, controlled by the load of the principal engine (momentum/revolutions on the main shaft), this also being an accurate measure of the current flow of fuel.

Applications Claiming Priority (2)

Publications (2)

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ID=36735800

Family Applications (1)

Country Status (2)

Cited By (7)

Citations (4)

• 2005
  • 2005-05-19 DK DK200500730A patent/DK200500730A/da not_active Application Discontinuation
• 2006
  • 2006-05-18 WO PCT/DK2006/000271 patent/WO2006122560A2/en active Application Filing

Patent Citations (4)

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