EP4160134A1 - Vorrichtung und verfahren zur reinigen von einbauten von anlagen - Google Patents

Vorrichtung und verfahren zur reinigen von einbauten von anlagen Download PDF

Info

Publication number
EP4160134A1
EP4160134A1 EP21200240.6A EP21200240A EP4160134A1 EP 4160134 A1 EP4160134 A1 EP 4160134A1 EP 21200240 A EP21200240 A EP 21200240A EP 4160134 A1 EP4160134 A1 EP 4160134A1
Authority
EP
European Patent Office
Prior art keywords
tube
charge
heat exchanger
smaller
tubes
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.)
Pending
Application number
EP21200240.6A
Other languages
English (en)
French (fr)
Inventor
Ralf Oblontzek
Andreas Thiemer
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.)
Conservator Tyche Beheer BV
Original Assignee
Conservator Tyche Beheer BV
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 Conservator Tyche Beheer BV filed Critical Conservator Tyche Beheer BV
Priority to EP21200240.6A priority Critical patent/EP4160134A1/de
Publication of EP4160134A1 publication Critical patent/EP4160134A1/de
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G7/00—Cleaning by vibration or pressure waves
    • F28G7/005—Cleaning by vibration or pressure waves by explosions or detonations; by pressure waves generated by combustion processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation

Definitions

  • the invention relates to a device for on- or offline cleaning the internals of installations, such as a furnace heat exchanger and/or a flue gas heat exchanger in a boiler of an incinerator, the heat exchanger comprising bundles of tubes or a membrane wall formed by or containing tubes, which device comprises a tube containing an explosive and/or pyrotechnical charge, and a detonator to cause explosion and/or deflagration of the charge.
  • the device and method according to the present invention are particularly suitable for removing production residues and/or deposits, e.g. from thermal incineration and recycling plants, power plants and equipment in chemical and production plants, such as deposits that negatively affect the efficiency or the production flow of a plant or equipment and thus have an indirect influence on the running time, performance and/or output of a plant.
  • EP 2 383 534 discloses a method for cleaning contaminations from heat exchangers, waste-heat boilers or combustion chambers, wherein the contaminations are loosened and/or removed by a linear blasting between the tubes to be cleaned.
  • a tube is provided inside with a blasting cord, is flowed through by a coolant, is brought between the tubes to be cleaned, the blast is triggered, and the tube is destroyed upon the blast.
  • the tubes may be made of cardboard, glass, metal, copper or plastic.
  • DE 1020 16202421 relates to a cooled cleaning device which includes a tube having an inner surface facing a tube interior and an outer surface facing the outer surroundings of the tube, a flammable material in the tube interior and a detonator are provided, and a distribution element to direct a fluid medium along at least a part of the outer surface of the tube.
  • the device according to the present invention is characterised in that the wall of the tube comprises two or more materials.
  • the tube comprises two or more layers of different materials, e.g. is made of a laminated material or a coextruded material.
  • the composite e.g. multilayer design enables adjusting, preferably fine-tuning, the properties of the tube to the requirements of the cleaning work that is to be carried out, examples of which will be discussed below.
  • At least one of the materials or layers in the tube comprises a synthetic material, in particular a polymer.
  • a synthetic material in particular a polymer.
  • examples include thermoplastic polymers, such as polyethylene, e.g. HDPE, polypropylene, acrylonitrile butadiene styrene (ABS), polyoxymethylene (POM), polyester, e.g. PET, PEN or PBT, polyamide (PA), or polyvinyl chloride (PVC), or a thermoset or cross-linked polymer, e.g.
  • PEX cross-linked polyethylene
  • PEX-A polyethylene of raised temperature
  • PE-RT polyethylene of raised temperature
  • MDPE-RT polyethylene of raised temperature
  • HDPE-RT polyethylene of raised temperature
  • MDPE-RT polyethylene of raised temperature
  • HDPEXc-RT polyethylene of raised temperature
  • MDPEXc-RT polyethylene of raised temperature
  • MDPEXc-RT polyethylene of raised temperature
  • LDPEXc low density polyethylene
  • LLDPEXc low density polyethylene
  • At least one of materials or layers is or comprises a metal, such as aluminium, magnesium or (stainless) steel. It is preferred that the metal layer has a thickness in a range from 5 microns to 0,5 millimeters, preferably in a range from 10 to 400 microns, preferably in a range from 15 to 300 microns, preferably in a range from 20 to 200 microns.
  • the metal layer can be, e.g., a deposited layer, a foil or film, and/or a sheet, e.g. butt welded where the longitudinal rims of the sheet meet.
  • the metal layer can be continuous or discontinuous, e.g perforated.
  • the tubes according to the present invention reduce the risk of damage to the tubes or surfaces that are being cleaned and/or leave virtually no detectable debris in the installation and/or enable the use of smaller amounts of pyrotechnical and/or explosive material, i.e. smaller charges, and/or smaller amounts or more materials that are more environmentally friendly.
  • the metal layer was found to provide a degree of heat shielding and/or contribute considerably to mechanical strength, in particular at temperatures in excess of 75 °C, e.g. in excess of 300 °C.
  • the tube comprises three main layers: inner and outer layers of polyethylene of raised temperature (PE-RT) and a middle layer of aluminium film.
  • PE-RT polyethylene of raised temperature
  • An adhesive or binding layer can be present between the metal layer(s) and adjacent layer(s), such as one or more layers of synthetic material.
  • suitable adhesive thermoplastic polymers include ethylene vinyl alcohol (EVOH), ethylene vinyl acetate copolymer (EVA), and copolymers of ethylene and acrylic acid or methacrylic acid, i.e. ethylene acrylic acid copolymer (EAA), ethylene methacrylic acid copolymer (EMAA).
  • the tube or a layer of the tube consists of or comprises a composite material, such as PEAL, a blend of low-density polyethylene (LDPE) and aluminium recycled from postconsumer aseptic packaging composed primarily of paper, low-density polyethylene (LDPE), and aluminium.
  • PEAL low-density polyethylene
  • LDPE low-density polyethylene
  • aluminium recycled from postconsumer aseptic packaging composed primarily of paper, low-density polyethylene (LDPE), and aluminium.
  • the charge preferably a detonation cord
  • the charge provides a linear explosion or deflagration.
  • the invention further relates to a device comprising a tube containing an explosive and/or pyrotechnical charge, and a detonator to cause explosion and/deflagration of the charge, wherein the tube with the charge in it is flexible.
  • the tube is elastically bendable with a bending radius equal to or smaller than 2 meter, preferably equal to or smaller than 1 meter, preferably smaller than 75 centimeters.
  • the tube is plastically bendable without breaking with a bending radius equal to or smaller than 1 meter, preferably equal to or smaller than 0,7 meter, preferably equal to or smaller than 40 centimeters.
  • the tube is preferably cylindrical, i.e. has a cross-section that is substantially constant over its length.
  • the tube has a circular cross-section.
  • the tube has a non-circular cross-section, e.g. an oval cross-section, so that the tube is stiffer in one direction (for manoeuvring) and more flexible in another direction (e.g. for bending along the deposits).
  • the tube comprises, between its inner wall and the charge, such as a detonation cord, a channel or lumen for a (flowing) coolant, such as water, air, carbon dioxide, or a mixture of air and water.
  • a (flowing) coolant such as water, air, carbon dioxide, or a mixture of air and water.
  • the (distal) end of the tube is open and, during cooling, the coolant flows out through this end.
  • a return duct can be provided to return the coolant to outside of the installation.
  • coolant is supplied to the outside of the tube, e.g. flows along the tube and/or is sprayed around the tube.
  • the tube and the charge in it has a length of at least 1 meter (m), preferably at least 1,5 m and/or a diameter smaller than 5 centimeters (cm), preferably in a range from 1 to 4 cm, preferably in a range from 1,5 to 3 cm.
  • the tube and charge For cleaning between the tubes of a heat exchanger, the tube and charge typically have a length in a range from 1 to 6 meters.
  • the tube and charge can be bent plastically, e.g. a helix, and can have a length of tens of meters, e.g. up to 100 meters.
  • the invention also relates to a system for on- or offline cleaning comprising a tube and charge as described above, a lance, which is provided at its proximal end, i.e. the end (to be) held by and thus close to an operator, with a supply for a coolant, such as water or a mixture of air and water, and a connector and/or electrical wires to connect the detonator to a controller and which is provided at its distal end, i.e. the end far or farthest from the operator that is inserted in the installation, with a head for holding the tube and charge and e.g. provided with outlets, e.g. nozzles, or ducts for supplying coolant to or about the tube and charge, when it is placed in the head.
  • a coolant such as water or a mixture of air and water
  • the wires of the detonator are connected to the wires in the lance, and the tube containing the charge is fixed in the head of the lance.
  • the coolant supply is turned on and the charge is inserted, by means of the lance, through an opening, such as a manhole, in an online incinerator, i.e. an incinerator at full or partial load, and positioned between the tubes of a bundle in a heat exchanger to be cleaned.
  • a spray or mist of coolant surrounds the charge to prevent it from untimely deflagration.
  • the detonator is activated and the charge deflagrates, thus cleaning the tubes in the bundle.
  • the lance has a length in a range from 3 to 8 meter, preferably a length in a range from 4 to 7 meter.
  • the invention further relates to cleaning an on- or offline installation comprising the steps of
  • the tube is inserted between the tubes in a bundle of tubes of a heat exchanger.
  • the tube is made from a flexible material and is bent by pulling it towards and/or against the deposits.
  • the tube is plastically deformed, e.g. in the shape of a loop, a helix, or semi-circle, before it is inserted in the incinerator.
  • the explosive material comprises pentaerythritol tetranitrate - also known as PENT, PENTA, TEN, corpent, penthrite or nitropenta -, ammonium nitrate/fuel oil (anfo) and/or gelatinous explosive, such as ethylene glycol dinitrate, diethylene glycol dinitrate, nitro-glycerine.
  • the pyrotechnical mixture is in accordance with class P2 of directive 2007/23/EC of the European Parliament and of the Council of 23 May 2007 on the placing on the market of pyrotechnic articles.
  • the mixture may for example comprise a reducing agent or fuel, such as black powder, aluminum, boron, titanium and/or magnesium; and an oxidant such as sodium nitrate, potassium chlorate and/or potassium perchlorate.
  • a reducing agent or fuel such as black powder, aluminum, boron, titanium and/or magnesium
  • an oxidant such as sodium nitrate, potassium chlorate and/or potassium perchlorate.
  • Preferred examples of pyrotechnical mixtures include black powder, aluminum and potassium perchlorate.
  • the detonator is a wireless detonator configured to initiate the explosion or deflagration upon receiving an encrypted radio signal.
  • the detonator is coupled to a controller by a set of wires, which controller preferably is configured to continually measure electrical resistance of the wires and the detonator.
  • controller preferably is configured to continually measure electrical resistance of the wires and the detonator.
  • the charge contains or is surrounded by an abrasive material, such as grit, to enhance the cleaning effect of the explosion and/or deflagration.
  • an abrasive material such as grit
  • DE 20 2017 001549 relates to a system for deslagging containers and plants by means of blasting so-called firecrackers / pyrotechnics, or disintegrants (z. B. class IV, T1 or T2).
  • EP 1 275 925 relates to a process and device for local destruction of compact material, e.g. masonry remains, etc., in hot thermal systems such as heat exchangers, industrial ovens, furnaces, and metallurgical melting vessels, which uses an explosive arranged on the front end of a lance in a cooling container through which coolant flows.
  • US 5,307,743 relates to a method and apparatus for deslagging a cyclone furnace in which a series of flexible hollow tubes are inserted into the combustion chamber and the explosive charges in each hollow tube are detonated sequentially. Each of the hollow tubes is biased outwardly against the accumulated slag and ash in the combustion chamber.
  • the hollow tubes may be formed in arcs or rings in planes perpendicular to the longitudinal axis of the combustion chamber, and spacer rings may be positioned between each ring.
  • Figure 1 is a schematic cross-section in length direction a tube according to the present invention.
  • Figures 2 and 3 are a front view and a perspective view of the end of the tube of Figure 1, Figure 3 with two layers peeled away.
  • Figure 4 show examples of the a tube according to the present invention plastically bent into a two-dimensional shape.
  • Figure 5 show examples of the a tube according to the present invention plastically bent into a three-dimensional shape.
  • Figure 1 is a cross-section a device 1 for on- or offline cleaning the internals of installations, comprising a tube 2 containing an explosive charge, in this example a detonation cord 3, and a detonator 4 to cause explosion of the charge.
  • the detonator comprises wires 5 to connect the detonator to a controller, such as an electronic blasting system, known in itself.
  • the inner wall and the detonation cord define an annular channel 6 for a coolant.
  • the detonator and wires can be secured e.g. in an opening in the wall of the tube or e.g. by means of a bushing 7, which, in embodiments wherein the tube is cooled on the inside, should allow the coolant to pass, e.g. by means of one or more channels or bores running the length of the bushing.
  • the tube has an external diameter of e.g. 16, 20, or 26 mm, a wall thickness of 2 mm, and comprises three main layers, i.c. inner and outer layers 8, 9 of polyethylene of raised temperature (PE-RT), and a middle layer 10 of aluminium. Additional layers of ethylene vinyl alcohol (EVOH; not visible in the Figures) are present between the PE-RT and the aluminium to promote adhesion between these main layers.
  • PE-RT polyethylene of raised temperature
  • EVOH ethylene vinyl alcohol
  • the detonations cord contains 18 grams or less of explosive charge per meter, e.g. 6 or 8 grams per meter.
  • the tube containing the charge is fixed in the head of a lance for manoeuvring and positioning the charge, such that the coolant channel in the tube communicates with a coolant supply in or on the lance, and the wires of the detonator are connected to wires in a lance.
  • a suitable embodiment of a(n articulated) land is described in European patent application EP 2 383 534 , mentioned above.
  • the coolant supply is turned on, causing the coolant to flow through the lance or a tube along the lance and through and/or along the tube containing the charge, to substantially surround the tube and/or the charge inside the tube.
  • the tube is inserted, by means of the lance, through an opening, such as a manhole, in an online incinerator, i.e. an incinerator at full or partial load.
  • the incinerator was at full at a temperature of 840 °C.
  • the tube is manoeuvred inside the incinerator between bundles of heat exchanger tubes and subsequently inserted between the tubes in a bundle. Inside the bundle, the detonator is activated and the charge explodes, thus cleaning the adjacent tubes from within the bundle.
  • the tubes according to the present invention reduce the risk of damage to the tubes or surfaces that are being cleaned and/or leave virtually no detectable debris in the installation and/or enable the use of smaller amounts of pyrotechnical and/or explosive material, i.e. smaller charges.
  • the tube with the charge in it is pulled towards and against deposits that have accumulated inside the bundle to follow, at least in part, the shape of the deposits and/or abut against the deposits, and the charge is detonated.
  • Figure 4 show examples of the a tube according to the present invention plastically bent into a two-dimensional shape, such as a circle, U-bent, or square.
  • Figure 5 show examples of the a tube according to the present invention plastically bent into a three-dimensional shape, such as a helix. I.e. the shape of the tube and the charge in it is plastically adapted to the shape of the surface or object to be cleaned,
  • the tube can comprise fewer layers, e.g. a metal layer covered by an single outer layer of a synthetic material, or more layers, e.g. additional layers of a synthetic material and/or of metal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)
EP21200240.6A 2021-09-30 2021-09-30 Vorrichtung und verfahren zur reinigen von einbauten von anlagen Pending EP4160134A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21200240.6A EP4160134A1 (de) 2021-09-30 2021-09-30 Vorrichtung und verfahren zur reinigen von einbauten von anlagen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21200240.6A EP4160134A1 (de) 2021-09-30 2021-09-30 Vorrichtung und verfahren zur reinigen von einbauten von anlagen

Publications (1)

Publication Number Publication Date
EP4160134A1 true EP4160134A1 (de) 2023-04-05

Family

ID=78211870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21200240.6A Pending EP4160134A1 (de) 2021-09-30 2021-09-30 Vorrichtung und verfahren zur reinigen von einbauten von anlagen

Country Status (1)

Country Link
EP (1) EP4160134A1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307743A (en) 1991-05-30 1994-05-03 Halliburton Company Apparatus for deslagging a cyclone furnace
EP1275925A1 (de) 2001-07-09 2003-01-15 Hans Eichner GmbH & Co.KG Verfahren und Vorrichtung zur lokalen Zerstörung kompakter Materialien in heissen thermischen Anlagen
US20040216698A1 (en) * 1997-01-17 2004-11-04 Northamerican Industrial Services Device, system and method for on-line explosive deslagging
EP2383534A1 (de) 2003-12-19 2011-11-02 Online Cleaning B.V. Verfahren und Vorrichtung zur Reinigung von Verschmutzungen in Wärmetauschern, Abhitzekesseln und Brennkammern
US9636717B2 (en) * 2012-12-20 2017-05-02 Bang & Clean Gmbh Device and method for cleaning combustion devices
DE102016202421A1 (de) 2015-12-30 2017-07-06 Berthold Steinberg Gekühlte Reinigungsvorrichtung
DE202017001549U1 (de) 2017-03-23 2018-06-28 Volker Kruse System zum Reinigen von Verbrennungseinrichtungen durch Sprengung in heissen Massen
US20200094296A1 (en) * 2017-05-24 2020-03-26 Bang & Clean Gmbh A device and a method for cleaning interiors of receptacles and facilities

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5307743A (en) 1991-05-30 1994-05-03 Halliburton Company Apparatus for deslagging a cyclone furnace
US20040216698A1 (en) * 1997-01-17 2004-11-04 Northamerican Industrial Services Device, system and method for on-line explosive deslagging
EP1275925A1 (de) 2001-07-09 2003-01-15 Hans Eichner GmbH & Co.KG Verfahren und Vorrichtung zur lokalen Zerstörung kompakter Materialien in heissen thermischen Anlagen
EP2383534A1 (de) 2003-12-19 2011-11-02 Online Cleaning B.V. Verfahren und Vorrichtung zur Reinigung von Verschmutzungen in Wärmetauschern, Abhitzekesseln und Brennkammern
US9636717B2 (en) * 2012-12-20 2017-05-02 Bang & Clean Gmbh Device and method for cleaning combustion devices
DE102016202421A1 (de) 2015-12-30 2017-07-06 Berthold Steinberg Gekühlte Reinigungsvorrichtung
DE202017001549U1 (de) 2017-03-23 2018-06-28 Volker Kruse System zum Reinigen von Verbrennungseinrichtungen durch Sprengung in heissen Massen
US20200094296A1 (en) * 2017-05-24 2020-03-26 Bang & Clean Gmbh A device and a method for cleaning interiors of receptacles and facilities

Similar Documents

Publication Publication Date Title
CA2900103C (en) Method and device for cleaning interiors of tanks and systems
EP2329191B1 (de) Gasimpulsgebläse
US8679399B2 (en) Apparatus for metal cutting and welding
CA2937691C (en) Method and device for cleaning interiors of receptables and installations
CN101663557A (zh) 爆炸材料的起爆
EP4160134A1 (de) Vorrichtung und verfahren zur reinigen von einbauten von anlagen
CA1213205A (en) Apparatus for forming an explosively expanded tube- tube sheet joint including a low energy transfer cord and booster
US8178744B1 (en) Method and apparatus to demilitarize small caliber ammunition
US20120259149A1 (en) Method and apparatus to demilitarize munition energetics
US20130139715A1 (en) Reactive material breaching device
JP7178369B2 (ja) 容器および施設の内部を洗浄するための装置および方法
US3993431A (en) Apparatus for generating high-pressure gas
EP2437024B1 (de) Pulsdetonationsreinigungsverfahren
EP1275925B1 (de) Verfahren und Vorrichtung zur lokalen Zerstörung kompakter Materialien in heissen thermischen Anlagen
EP2416105B1 (de) Sprengbehandlungsverfahren und sprengbehandlungsvorrichtung
ES2373655T3 (es) Dispositivo para la limpieza de suciedad en intercambiadores de calor, calderas de recuperación de calor y cámaras de combustión.
EP3770545B1 (de) Vorrichtung und verfahren zur reinigung von anlagen
EP3885686A1 (de) Verfahren und ladung zur reinigung von wärmetauschern von verbrennungsanlagen
RU2714165C1 (ru) Способ расснаряжения боеприпасов
KR100561361B1 (ko) 소구경 튜브 홀을 가진 열교환기류의 튜브와 튜브시트와의 폭발접합 방법
CN105384591A (zh) 焦炭骨架石蜡固体火箭燃料
WO2021240414A1 (en) Method and apparatus for hot or cold cleaning combustion slag by means of an explosive shock wave
US20060272684A1 (en) Method of and apparatus for cleaning fouling in heat exchangers, waste-heat boilers and combustion chamgers
Frolov et al. Shock-to-detonation transition in tube coils
ITRM20120029U1 (it) Dispositivo per la pulizia dei condotti presenti nelle caldaie dei forni per la produzione di energia

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

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

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20231005

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR