EP0563554A1 - Procédé et installation pour éliminer du mercure de tuyaux contaminés et de pièces d'installation, notamment du mercure transporté avec le gaz naturel - Google Patents

Procédé et installation pour éliminer du mercure de tuyaux contaminés et de pièces d'installation, notamment du mercure transporté avec le gaz naturel Download PDF

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Publication number
EP0563554A1
EP0563554A1 EP93102309A EP93102309A EP0563554A1 EP 0563554 A1 EP0563554 A1 EP 0563554A1 EP 93102309 A EP93102309 A EP 93102309A EP 93102309 A EP93102309 A EP 93102309A EP 0563554 A1 EP0563554 A1 EP 0563554A1
Authority
EP
European Patent Office
Prior art keywords
inert gas
pipe
mercury
tube
cleaned
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.)
Granted
Application number
EP93102309A
Other languages
German (de)
English (en)
Other versions
EP0563554B1 (fr
Inventor
Friedrich Dipl.-Ing. Schlemm
Hans Kaast
Siegfried Dr. Müssig
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.)
BEB Erdgas und Erdol GmbH
Original Assignee
BEB Erdgas und Erdol GmbH
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 BEB Erdgas und Erdol GmbH filed Critical BEB Erdgas und Erdol GmbH
Publication of EP0563554A1 publication Critical patent/EP0563554A1/fr
Application granted granted Critical
Publication of EP0563554B1 publication Critical patent/EP0563554B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 
    • B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027—Cleaning the internal surfaces; Removal of blockages
    • B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B43/00—Obtaining mercury
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2230/00—Other cleaning aspects applicable to all B08B range
    • B08B2230/01—Cleaning with steam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0402—Cleaning, repairing, or assembling
    • Y10T137/0419—Fluid cleaning or flushing

Definitions

  • the invention relates to methods and plants for the removal of mercury from natural gas pipes and natural gas transport system parts for the processing and transportation of natural gas.
  • mercury vapors are also discharged from the natural gas deposits with the extracted natural gas, which are reflected in the pipes and plant parts as mercury.
  • Mercury vapors as a contaminant in natural gas only occur to a very small extent, with years of use of the natural gas pipelines mercury and possibly mercury compounds are found in such quantities that the pipes must not be melted down for environmental reasons when the pipelines are scrapped, because this melts down when they are melted down the ambient air in the form of vaporized mercury would sustainably poison the atmosphere.
  • the invention consists in that the line is broken up into pipe sections by cold cuts, that after each cut the pipe section is raised into an oblique or vertical position and the contents of the pipe section of solids and liquids are placed in a vessel placed under the lower pipe end can run out, that then both ends of the pipe section are closed by plugs and the pipe section is transported to an evaporation station, in which the pipe section is filled with inert gas into the plug, the pipe section filled with inert gas is heated and thereby splits existing mercury compounds and the existing mercury evaporates, and that the heated inert gas containing mercury vapor is transferred to a condenser in which the inert gas containing mercury vapor is cooled until the mercury precipitates out of the inert gas.
  • the procedure is carried out in such a way that the pipe section is previously evacuated for the inert gas filling in order to remove oxygen from the pipe section as far as possible.
  • Nitrogen is expediently used as the inert gas.
  • the inert gas filling is kept under negative pressure at least while the tube is being heated.
  • the tube piece is heated by heat brought in from outside to above the vaporization temperature of the mercury and then the inert gas filling of the tube is preferably carried out several times against mercury-free Inert gas changes in cycle operation and feeds the condenser.
  • the inert gas is moved through the tube many times in a circuit and is heated outside the tube to be cleaned before it is sucked out of the circuit and fed to the condenser.
  • An essentially U-shaped or C-shaped pipe arrangement is used for this purpose, between the ends of which the pipe to be cleaned is clamped and which has heating devices for the inert gas in its interior.
  • Such a heating device could also be accommodated inside the pipe to be cleaned.
  • the procedure is expediently such that the pipe is shut off on both sides of the pipe section to be cleaned, that the gases from the blocked pipe section are preferably evacuated via a cleaning device and replaced by inert gas so that the pipe is cut off in sections heated and flushed with the inert gas, preferably under reduced pressure, after which the mercury vapor present in the inert gas is removed by condensation.
  • the heating device is expediently mounted on a trolley which is moved along the natural gas line to be cleaned.
  • the procedure is expediently such that the inert gas is allowed to migrate in the pipe to be cleaned in the direction in which the heating device is moved. In this way it is achieved that mercury cannot precipitate again in the cleaned pipe section. You only need to heat a short piece of pipe intensively in this way.
  • the facility for the removal of mercury from contaminated Pipes and plant parts consist of an inert gas storage, a heating device , an evacuation device, a condenser and a suction device, which are connected to one another by pipes into which the pipe or the pipe part to be cleaned are inserted.
  • the heating device from an oven surrounding the pipe section to be cleaned, or from an inert gas heater to be inserted into the pipe section to be cleaned, or from an inert gas heater arranged outside the pipe section to be cleaned, or from a burner surrounding the pipe section to be cleaned or from a burner electric current or electromagnetic wave operated heating device. It is also possible to use superheated steam.
  • an inert gas ring line in which a device for inserting the pipe to be cleaned and the heating device are arranged and to which a stub line is arranged which leads to the condenser.
  • the spur line is also a ring line which is connected to the inert gas ring line at two points.
  • Pipes 2 to be cleaned are stored on bearing stands 1 and are closed at their ends by plugs 3 and lead into the connecting pieces 4 to which inert gas lines are connected.
  • the vacuum pump 7, via which the pipes are evacuated, is connected to the inert gas line 5 via a branch line 6.
  • the inert gas source 9 is connected via a spur line 8.
  • the stub lines 6, 8 can be connected to the inert gas line 5 by valves 10.
  • This natural gas line 5 is guided in a ring over a condenser 11, in which the mercury vapors are precipitated into liquid mercury.
  • In the ring line there is also a blower 12 with which the inert gas flow is circulated in the ring line 5. Heated the inert gas and the tubes 2 through a warm air oven 13, which is movable on rails 14 on the stand 1 packed with tubes 2.
  • two storage stands are provided, one is visible on the drawing, the warm air oven is driven over the other.
  • the inert gas is cooled to such a depth in the condenser 11 that the mercury precipitates.
  • the inert gas thus leaves the condenser 11 at a low temperature.
  • a heat exchanger 15, 16 is now used for this purpose, in the part 15 of which the temperature of the inert gas entering the condenser 11 is cooled down, while in the heat exchanger part 16 the heat released in the heat exchanger part 15 is added again to the inert gas leaving the condenser when it is cooled.
  • the heat exchanger part 16 is followed by a heating device 17.
  • valves can be operated 18,19,20,21 provided.
  • the valves 20 and 21 By opening the valves 20, 21, the right workplace is connected to the inert gas ring line 5 connected.
  • the valves 18 and 19 are closed, so that no more inert gas can flow through the pipes at the other work station.
  • valves 18, 19 are closed, the pipes are allowed to cool first, the plugs 3 are then removed on both sides, the treated pipes are removed and replaced by pipes to be treated, these are closed by the plugs 3 and thus prepared the next operation, which is initiated by closing the valves 20, 21, opening the valves 18, 19 and pushing the warm air oven 13 over the work station with the valves 18, 19 open.
  • the tubes 2 are not heated from the outside with a warm air oven, but from the inside by means of a strongly heated inert gas.
  • two stacks I, II are provided, which are mutually subjected to the treatment. If batch I is treated with hot inert gas, the tubes of batch II cool down and are exchanged for tubes to be treated. Valves 18, 19, 20, 21 are also provided here in order to introduce only one tube stack into the treatment process at a time.
  • This treatment method of heating from the inside by the inert gas has the advantage that all mercury has already evaporated when the outer wall of tube 2 exceeds the vaporization temperature of mercury.
  • This method can be carried out in an energetically favorable manner if the pipeline system is in two circles is divided: a circle with the pipe 41 leading to the stack, the pipe 42 coming from the stack and a pipe 40 connecting these two pipes, in which a heating device 38 and a fan 22 are provided.
  • a second pipe circuit 23 runs parallel to the pipe 20 and can be connected to the two ends of the line 40 via valves 24.
  • the condenser 11, the blower 12 and the heat exchanger 15, 16 are located in this second pipe circuit 23.
  • an inert gas source 9 and a vacuum pump 7 are connected to the pipe network.
  • a valve 25 is used to shut off line 40.
  • the lines 40, 23 are operated alternately, ie when the line 40 is closed by the valve 25, the valves 24 are open, while the valve 25 is open when the valves 24 are closed.
  • This device works as follows: When the valve 25 is open and the valves 24 are closed, the system is emptied of air by the vacuum pump 7 with the valve 10 open, preferably via cleaning devices. At the same time, when the valve 10 is open, inert gas is introduced into the line from the inert gas source 9 until all air is replaced by inert gas. The inert gas heater 38 is then switched on. The blower 22 presses the hot inert gas into the pipes 2 to be cleaned. The inert gas emerges from the pipes via line 19 and arrives again through the opened valve 25 Heating device 38. This process is continued until the outside temperature of the tubes 2 has exceeded the vaporization temperature of mercury. The inert gas is thus pumped in constant circulation through the pipes and through the heating device in a constant cycle.
  • the heating device 38 is stopped and the valve 25 is closed, but the valves 24 are opened.
  • the hot inert gas flows through the heat exchanger part 15 into the condenser 11.
  • the vaporous mercury condenses as a liquid.
  • the cooled inert gas is sucked in by the blower 12 and pressed through the heat exchanger part 16.
  • the inert gas is heated again and returns to the pipes 2 to be cleaned in the circuit through line 41. This process can be carried out repeatedly.
  • the pipe 2 to be treated is also closed with a plug 3.
  • These plugs carry connecting pieces 26 for the inert gas line 5.
  • the blower 12, the heat exchanger 15, 16 and a heating device 17 are arranged.
  • the vacuum pump 7 and the inert gas source 9 are also connected to this line.
  • the heater 17 is of low power. This is because the main part of the heating is supplied by a pipe 3 installed in the plug 3 protruding heating device 27.
  • the tube 2 is placed on foundations 28.
  • FIG. 4 shows an example in which an underground gas line 29 treats becomes.
  • an assembly pit 30 has been excavated from the ground, the natural gas line 29 is drilled at two points and provided with tapping clips 31.
  • These tapping clamps 31 have shut-off devices, for example shut-off bubbles, installed in the interior of the natural gas line 29.
  • These tapping clamps 31 have connecting pieces 32 for a hose line 33, which is led to the inert gas treatment chamber 34 on the vehicle 35.
  • the condenser, blower, heat exchanger, heating device, vacuum pump and inert gas source are accommodated.
  • the natural gas line 29 is heated by a heat source mounted on a vehicle 36.
  • the direction of flow of the inert gas indicated by an arrow on the natural gas line is the same as the direction of travel of the vehicle 36 with the heat source 37.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Treating Waste Gases (AREA)
  • Processing Of Solid Wastes (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Gas Separation By Absorption (AREA)
  • Cleaning In General (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
EP93102309A 1992-03-30 1993-02-15 Procédé et installation pour éliminer du mercure de tuyaux contaminés et de pièces d'installation, notamment du mercure transporté avec le gaz naturel Expired - Lifetime EP0563554B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4210455 1992-03-30
DE19924210455 DE4210455C1 (fr) 1992-03-30 1992-03-30
US08/122,924 US5529605A (en) 1992-03-30 1993-09-17 Method and apparatus for removing mercury from contaminated pipes and installation parts, in particular mercury introduced by natural gas

Publications (2)

Publication Number Publication Date
EP0563554A1 true EP0563554A1 (fr) 1993-10-06
EP0563554B1 EP0563554B1 (fr) 1996-06-12

Family

ID=25913402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93102309A Expired - Lifetime EP0563554B1 (fr) 1992-03-30 1993-02-15 Procédé et installation pour éliminer du mercure de tuyaux contaminés et de pièces d'installation, notamment du mercure transporté avec le gaz naturel

Country Status (9)

Country Link
US (1) US5529605A (fr)
EP (1) EP0563554B1 (fr)
AT (1) ATE139151T1 (fr)
DE (2) DE4210455C1 (fr)
DK (1) DK0563554T3 (fr)
ES (1) ES2090728T3 (fr)
GR (1) GR3020945T3 (fr)
HU (1) HUT68534A (fr)
PL (2) PL171014B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19520876A1 (de) * 1995-06-08 1996-12-12 Heiner Czwaluk Verfahren zur Entfernung von an Innenwänden von Rohren abgelagerten Schichten aus umweltbelastenden Stoffen und Vorrichtung zur Durchführung des Verfahrens
WO1998040174A1 (fr) * 1997-03-13 1998-09-17 Bg Plc Appareil et procede de nettoyage d'un tuyau
WO2016154394A1 (fr) * 2015-03-25 2016-09-29 Chevron U.S.A. Inc. Processus, procédé et système d'élimination du mercure présent dans des conduites

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4431424C2 (de) * 1994-08-23 1998-07-30 Meyer & John Gmbh & Co Verfahren zum Entfernen von Quecksilber aus Rohren
DE19653702C1 (de) * 1996-12-16 1998-08-20 Meyer & John Gmbh & Co Verfahren zum thermischen Reinigen von Rohren
US5940920A (en) * 1997-07-11 1999-08-24 Philip Services Corp. Pipe cleaning apparatus
US6161558A (en) * 1998-11-25 2000-12-19 Electrol Specialties Company Portable clean-in-place system for batch processing equipment
US6866089B2 (en) * 2002-07-02 2005-03-15 Carrier Corporation Leak detection with thermal imaging
NL1024862C2 (nl) * 2003-11-25 2005-05-27 Anthonius Hendricus Vermeulen Inrichting en werkwijze voor het verwijderen van kwik uit reststoffen.
US10301804B2 (en) * 2013-07-12 2019-05-28 Daniel Grenier Method and system of removing debris from piping in a high-rise building plumbing network
US20210246359A1 (en) * 2020-02-10 2021-08-12 Chevron U.S.A. Inc. Process for removal of contaminants from offshore oil and gas pipelines
CN113957263B (zh) * 2021-10-21 2022-12-09 宁波大地化工环保有限公司 一种连续式处理高硫阳极泥的溶硫装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911994C2 (de) * 1978-04-12 1982-05-19 Lumalampan Ab, Karlskrona Verfahren zum Trennen von Quecksilber als Verunreinigung aus festem Material und Vorrichtung zur Durchführung des Verfahrens
DE3609517C1 (en) * 1986-03-18 1987-11-19 Marcus Matthias Elektro Ofen Process and apparatus for removing mercury from solid mercury-containing materials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3428720A1 (de) * 1984-08-03 1986-02-13 Energietechnik Steinhaus GmbH, 4354 Datteln Verfahren und anlage zum reinigen und/oder trocknen der innenwaende von fernrohrleitungen
US5354357A (en) * 1993-03-01 1994-10-11 Uop Removal of mercury from process streams

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911994C2 (de) * 1978-04-12 1982-05-19 Lumalampan Ab, Karlskrona Verfahren zum Trennen von Quecksilber als Verunreinigung aus festem Material und Vorrichtung zur Durchführung des Verfahrens
DE3609517C1 (en) * 1986-03-18 1987-11-19 Marcus Matthias Elektro Ofen Process and apparatus for removing mercury from solid mercury-containing materials

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19520876A1 (de) * 1995-06-08 1996-12-12 Heiner Czwaluk Verfahren zur Entfernung von an Innenwänden von Rohren abgelagerten Schichten aus umweltbelastenden Stoffen und Vorrichtung zur Durchführung des Verfahrens
DE19520876C2 (de) * 1995-06-08 1998-07-09 Heiner Czwaluk Verfahren zur Entfernung von an Innenwänden von Rohren abgelagerten Schichten aus umweltbelastenden Stoffen und Vorrichtung zur Durchführung des Verfahrens
WO1998040174A1 (fr) * 1997-03-13 1998-09-17 Bg Plc Appareil et procede de nettoyage d'un tuyau
US6361616B1 (en) * 1997-03-13 2002-03-26 Transco Plc Pipeline cleaning method and apparatus
WO2016154394A1 (fr) * 2015-03-25 2016-09-29 Chevron U.S.A. Inc. Processus, procédé et système d'élimination du mercure présent dans des conduites

Also Published As

Publication number Publication date
US5529605A (en) 1996-06-25
PL298297A1 (en) 1994-01-24
DK0563554T3 (da) 1996-07-01
HUT68534A (en) 1995-06-28
GR3020945T3 (en) 1996-12-31
DE59302869D1 (de) 1996-07-18
DE4210455C1 (fr) 1993-09-23
ATE139151T1 (de) 1996-06-15
EP0563554B1 (fr) 1996-06-12
PL171702B1 (pl) 1997-06-30
ES2090728T3 (es) 1996-10-16
PL171014B1 (pl) 1997-02-28
HU9300604D0 (en) 1993-09-28

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