WO2005050121A1 - Verfahren zum entfernen von feststoffen aus rohren eines rohrbündel-wärmetauschers - Google Patents
Verfahren zum entfernen von feststoffen aus rohren eines rohrbündel-wärmetauschers Download PDFInfo
- Publication number
- WO2005050121A1 WO2005050121A1 PCT/EP2004/011181 EP2004011181W WO2005050121A1 WO 2005050121 A1 WO2005050121 A1 WO 2005050121A1 EP 2004011181 W EP2004011181 W EP 2004011181W WO 2005050121 A1 WO2005050121 A1 WO 2005050121A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drill
- tube
- heat exchanger
- tubes
- pipes
- Prior art date
Links
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
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/06—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds in tube reactors; the solid particles being arranged in tubes
-
- 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
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets
-
- 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
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/045—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices being rotated while moved, e.g. flexible rotating shaft or "snake"
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
-
- 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
- F28G3/00—Rotary appliances
- F28G3/02—Rotary appliances having abrasive tools
-
- 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
- F28G3/00—Rotary appliances
- F28G3/10—Rotary appliances having scrapers, hammers, or cutters, e.g. rigidly mounted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00743—Feeding or discharging of solids
- B01J2208/00761—Discharging
Definitions
- the invention relates to a method for removing solids from tubes of a tube bundle heat exchanger, in particular a method for removing catalyst material from tubes of a tube bundle reactor.
- heat exchangers are used in a wide variety of processes, in which a fluid to be tempered, in particular a fluid to be heated or cooled, for example liquids, gases or liquid / gas mixtures, are passed through numerous tubes, referred to as tube bundles, arranged in parallel, which are surrounded by a suitable heat exchange medium.
- a fluid to be tempered in particular a fluid to be heated or cooled, for example liquids, gases or liquid / gas mixtures
- tube bundles arranged in parallel, which are surrounded by a suitable heat exchange medium.
- contamination, caking or incrustation may occur in the tubes during operation, so that the tubes must be cleaned regularly.
- the tubes are usually cleaned of heat exchangers by means of liquids brought to high pressure and sprayed (high pressure cleaning or hydroblasting). Very solid and compact impurities can only be insufficiently removed by such high pressure cleaning.
- internals such as baffles, baffles, spirals, gas mixers, etc. are often arranged in the tubes of a tube bundle heat
- a special variant of the tube bundle heat exchangers are the so-called tube bundle reactors, which are used to carry out chemical reactions, for example to carry out exothermic and endothermic catalytic gas phase reactions, such as the production of phthalic anhydride (PSA), acrylic acid, methacrylic acid (MMA), acrolein, maleic anhydride (MSA), glyoxal, phosgene, hydrocyanic acid or vinyl formamide (VFA) can be used.
- PSA phthalic anhydride
- MMA methacrylic acid
- MSA maleic anhydride
- glyoxal glyoxal
- phosgene hydrocyanic acid or vinyl formamide
- VFA vinyl formamide
- Such catalytic gas phase reactions are usually carried out in tube bundle reactors on fixed bed catalysts.
- the tube bundle reactors usually consist of a reaction tube bundle arranged in a reactor jacket and made up of numerous reaction tubes.
- the reaction tubes usually contain supported catalysts,
- Shell catalysts unsupported catalysts and / or ordered packings of catalyst material, which are arranged comparable to a static mixer. Chemical reactions take place in the reaction tubes of the tube bundle, the heat exchange medium washing around the tubes supplying or removing the heat of reaction.
- the tube bundle reactors used in the industrial production process can have diameters of up to several meters and contain between approximately 100 and 50,000 reaction tubes. The cleaning of the reaction tubes is correspondingly complex. In certain catalytic gas phase reactions, the tube bundle reactor can also be followed by a reaction gas aftercooler designed as a tube bundle heat exchanger, which further increases the cleaning effort due to the large number of tubes.
- European patent application EP-A 1 226 865 describes a process for removing spent catalyst material from a reaction tube.
- a flexible or rigid suction hose is inserted into the reaction tube and catalyst material is sucked out of the reaction tube by means of a negative pressure generated by a suction device.
- the hose for loosening slightly caked or glued catalyst material can have beveled tips at its free end inserted into the tube.
- the invention is therefore based on the technical problem of specifying a method for removing solids from tubes of a tube bundle heat exchanger, in particular for removing catalyst material from reaction tubes of a tube bundle reactor, which also permits quick and reliable cleaning of the tubes when the solids are not more in loose particle form, but in the form of solid blocks and / or adhering particularly firmly to the inner tube walls.
- the invention is based on the idea of introducing a rotating drill driven by a drilling machine into the tubes of a tube bundle heat exchanger to be cleaned and removing the solids contained in the tubes with the aid of the rotating bit, ie transporting them outside of the reaction tube.
- the drilling machine can also set the drill into rotation with superimposed axial movements.
- the axial loading movement can be a continuous feed or a periodic reciprocating movement generated by a mechanical or hydraulic hammer mechanism.
- the drill is a twist drill and has a spiral conveying groove which is recessed in the outer casing of the drill and in which the solid particles loosened and separated by the drill tip when the drill is inserted into the pipe can be removed from the pipe.
- a twist drill is particularly preferably used for cleaning reaction tubes or heat exchanger tubes which are filled with stone-like or ceramic material, such as, for example, with shaped catalyst bodies, coated catalyst support bodies or shaped bodies made of ceramic inert material.
- the twist drill advantageously has a blunt drill tip in order to minimize the risk of damage to the inner tube walls of the tube bundle.
- So-called stone drills are particularly preferably used instead of metal drills, which further reduces the risk of damage to the pipes.
- twist drills are not suitable if the pipes to be cleaned contain metallic internals, for example internals to increase the heat transfer, such as baffle plates or spirals.
- the drill is a hollow drill provided with an essentially annular drill tip.
- a hollow drill has a central recess running in the longitudinal direction of the drill along the axis of rotation, which opens into the drill tip at the free end of the drill.
- reaction tubes and heat exchanger tubes can be cleaned, in particular also tubes which have metallic internals, such as metal spirals suspended in the reaction tubes, for improving the heat transfer. Because of its central recess, the hollow drill used in accordance with the invention is in fact able to drill around such internals, so that seizing of the drill bit on metal parts can be avoided.
- the outside diameter of the twist or hollow drill is preferably 10 to 95% of the inside diameter of the pipe to be cleaned.
- the drill When carrying out the method according to the invention, the drill is set in rotation by means of the drilling machine, inserted into the pipe and driven into the solid to be cleared, for example a baked catalyst mass.
- An ejection window is preferably provided in the region of the end of the drill provided with the drilling spindle of the drilling machine, which is aligned with the central one along the longitudinal axis of the Hollow drill extending communicates from which the material crushed by the drill tip can be ejected.
- internals such as a helix, can also be provided, which support the transport of the solid particles loosened from the drill tip to the ejection window.
- tooth-like projections are provided on the annular drill tip, which facilitate the breaking up of the solid material contained in the tubes.
- the tooth-like projections can have any shape.
- the tooth-like projections preferably have a triangular and / or rectangular, for example square, shape.
- the triangular projections can be designed as symmetrical or asymmetrical triangles. In the case of asymmetrical triangles, the steeper flank of the triangle is preferably in the direction of rotation of the drill.
- the tooth-like projections can be arranged in a row on the annular drill tip.
- the rings can also be arranged in several concentric rows, an arrangement in one to three rows being preferred.
- a hollow drill is used, the drill tip of which tapers essentially conically towards its free end.
- a tapered drill tip reliably prevents damage to the tube walls.
- the angle ⁇ enclosed between the axial longitudinal axis, that is to say the axis of rotation, of the hollow drill and the conical jacket of the drill tip is advantageously in the range from 0 ° to 20 °, preferably in the range from 1 ° to 10 ° and particularly preferably in the range from 1.5 ° up to 8 °. Larger cone angles than 20 ° are less preferred because then more solid particles are clamped between the drill and the pipe wall. It goes without saying that a cone angle of 0 °, which is also expressly included here, corresponds to a "cone" with a cylindrical jacket that does not taper towards the tip.
- the tooth-like projections can be arranged such that all teeth lie on an imaginary cone-like surface, the generatrix of which forms a certain angle with the axis of rotation of the drill. If this angle corresponds to the cone angle of the tapered drill bit, the teeth are in the extension of the tapered drill bit.
- the imaginary surface can also include an angle with the axis of rotation that is greater or smaller than the cone angle of the drill bit, so that the teeth are directed inwards or outwards with respect to the cone formed by the drill bit.
- Hollow drills can also be used which have a group of tooth-like projections which lie on a first imaginary cone-like surface, while a further group of tooth-like projections are provided which lie on a second imaginary cone-like surface, the generatrix of the two cone-like surfaces different angles with include the axis of rotation.
- successive teeth can, for example, be alternately oriented parallel to the axis of rotation (ie the angle between the generatrix of the imaginary surface and the axis of rotation is 0 °) or an angle of 5 ° inwards with the axis of rotation. In the case of hollow drills with several rows of teeth, this angle can also differ from row of teeth to row of teeth.
- the preferred number of tooth-like projections is preferably selected depending on the outer circumference of the annular drill tip. 1 to 6 teeth are advantageously provided per centimeter outer circumference.
- the length of the conically tapering part of the drill tip, measured parallel to the longitudinal axis (axis of rotation) of the drill, preferably corresponds to 0.1 to 3 times the outer diameter of the drill, the outer diameter being measured in the non-tapered, essentially cylindrical section of the drill ,
- the drill is preferably operated at a speed between 0 and 400 rpm, preferably between 200 and 280 rpm.
- the solids to be cleared out in the tubes of the tube bundle heat exchanger are treated with a solvent before the drilling machine is used.
- This variant of the method is particularly suitable for removing bonded, coherent catalyst materials from reaction tubes.
- the bottom of the reactor or heat exchanger is either closed or provided with a small opening.
- the tube space of the reactor is then filled with a suitable solvent which can act on the solids in the tubes for a period of typically 1 to 240 hours.
- the solvent can be drawn off at the bottom of the reactor or heat exchanger and added to the reactor or heat exchanger in a circuit at the top. This solvent circuit can of course also be operated in the opposite direction.
- the amount of liquid pumped is preferably dimensioned such that an empty tube speed of 0 to 1 m / s is established in the reaction tubes.
- Empty pipe speed is to be understood as the calculated speed from flow and pipe cross-section, which would result if the pipes were completely without filling.
- empty pipe speeds of over 1 m / s can also be achieved.
- Water is preferably used as the solvent and particularly preferably an alkaline solvent such as dilute or concentrated sodium hydroxide solution or dilute or concentrated potassium hydroxide solution.
- alkali residues can be removed from the tubes of the tube bundle by rinsing with water.
- the tubes are then left to dry in the ambient air or by blowing in heated air.
- the invention also relates to the use of a drilling machine, preferably provided with a twist drill or a hollow drill, for removing solids from tubes of a tube bundle heat exchanger.
- FIGS 1 to 4 are schematic partial views of the drill tips of preferred embodiments of the drills used in the method according to the invention.
- FIG. 1 shows an essentially cylindrical hollow drill 10 which has an essentially circular drill tip 11.
- the drill tip 11 is provided with tooth-like projections 12.
- the tooth-like projections 12 in the drill of FIG. 1 are designed as essentially symmetrical triangles.
- FIG. 2 shows a variant of the drill of FIG. 1, the hollow drill 20, which is also essentially cylindrical, being provided with asymmetrical triangular projections 22 on the drill tip 21.
- the steeper flank 23 of the triangles 22 points in the direction of rotation of the drill symbolized by an arrow.
- Figure 3 shows a cylindrical hollow drill 30, the drill tip 31 is provided with rectangular projections 32.
- FIG. 4 shows a particularly preferred variant of a substantially cylindrical hollow drill 40, the drill tip 41 of which has a conical section 44 tapering towards the free end.
- a cone angle ⁇ is included between the surface line (generatrix) 45 and the central longitudinal axis 46 of the drill 40.
- the tooth-like projections provided according to the invention on the drill tip are not shown in FIG.
- a reactor with tubes with a diameter of 25 mm was at the upper end with cylindrical shaped bodies (inert) of size 7 mm x 7 mm x 4 mm (outer diameter x Height x inner diameter).
- the moldings were baked together due to deposits consisting of MoO 3 and coke-like constituents.
- the attempt to extract these tubes by means of a suction tube which consisted of a plastic tube with an 80 cm long, diagonally cut metal tube with 85% reaction tube diameter, was unsuccessful.
- the reactor from comparative example 1 was cleaned using the process according to the invention.
- a drilling machine was equipped with a hollow drill.
- the hollow drill had the following geometrical data: steel shank with a length of 400 mm, a diameter of 23 mm and a cone angle of 5 °. The length of the cone was 30 mm.
- the teeth of the drill consisted of 15 stellite teeth welded and ground on the circumference of the drill tip, which were designed as symmetrical triangles with a height of 3 mm. The drill was operated at a rotation speed of 220 to 280 rpm.
- the caked layer could easily be removed.
- the time [minutes: seconds] for drilling through the baked layer was, depending on the degree of caking, between 26 seconds and 39 seconds per tube.
- the baked layer had a thickness of approximately 200 mm. The inerts below and the following shaped catalyst bodies could then be suctioned off.
- Examples 2 to 13 are summarized in Table 1 below.
- the cleaning of the pipes was possible in all cases. However, it can be seen that the use of drills with cone angles of less than 20 ° and tooth heights of less than 7 mm are preferred. *) frequent seizure of the drill **) one tooth broken off Table 1: Summary of Examples 3 -13
- reaction gas aftercooler turned out to be completely dirty with hard material, which had penetrated into the pipes.
- the black dirt contained molybdenum and when heated to 800 ° C in air lost 26.8% of its mass, which was interpreted as carbon (determined using the method of thermogravimetry).
- Mechanical methods of cleaning have proven unsuccessful or very time consuming.
- cleaning was possible by drilling out the individual tubes using the method according to the invention, but this took a very long time.
- the reaction gas aftercooler was therefore closed at the bottom and filled with a 10% sodium hydroxide solution. The component stayed like this for 36 hours. After draining off the sodium hydroxide solution and then neutral washing with water, 87% of the dirty pipes could be cleaned with a wire brush. The remaining 13% could be removed quickly and easily from the tubes by drilling out with a drill according to the invention as described in Example 2.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112004002211T DE112004002211D2 (de) | 2003-11-17 | 2004-10-06 | Verfahren zum Entfernen von Feststoffen aus Rohren eines Rohrbündel-Wärmetauschers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10353617.5 | 2003-11-17 | ||
DE10353617A DE10353617A1 (de) | 2003-11-17 | 2003-11-17 | Verfahren zum Entfernen von Feststoffen aus Rohren eines Rohrbündel-Wärmetauschers |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005050121A1 true WO2005050121A1 (de) | 2005-06-02 |
Family
ID=33521615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/011181 WO2005050121A1 (de) | 2003-11-17 | 2004-10-06 | Verfahren zum entfernen von feststoffen aus rohren eines rohrbündel-wärmetauschers |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050109377A1 (de) |
CN (1) | CN1882819A (de) |
DE (2) | DE10353617A1 (de) |
RU (1) | RU2006121329A (de) |
WO (1) | WO2005050121A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8749364B2 (en) | 2011-11-01 | 2014-06-10 | Toyota Jidosha Kabushiki Kaisha | In-vehicle display apparatus, server, vehicle information display system, and communication method |
US9126171B2 (en) | 2007-06-01 | 2015-09-08 | Basf Se | Process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006045088A1 (de) * | 2006-09-21 | 2008-03-27 | Basf Ag | Verfahren zum Durchmischen einer in einem im wesentlichen abgeschlossenen Behälter befindlichen Flüssigkeit oder Mischung aus einer Flüssigkeit und einem feinteiligen Feststoff |
US8398785B2 (en) * | 2009-08-10 | 2013-03-19 | Nlb Corp. | Rigid lance cleaning system and method therefor |
US8729278B2 (en) | 2009-10-26 | 2014-05-20 | Exxonmobil Chemical Patents Inc. | Phthalic anhydride process |
CN106017201A (zh) * | 2016-05-25 | 2016-10-12 | 江苏科瑞工程设计有限公司 | 废硫酸裂解再生装置余热锅炉的在线清灰装置及清灰方法 |
DE102016123760B4 (de) | 2016-12-08 | 2021-02-25 | Phoenix Contact Gmbh & Co. Kg | Austrennwerkzeug |
CN110496830B (zh) * | 2019-09-23 | 2023-09-19 | 云南锡业股份有限公司铜业分公司 | 一种凝汽器管道疏通装置及其疏通方法 |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB116332A (en) * | 1917-06-04 | 1918-06-04 | Ernest Forder | Improved Means for Cleaning Tubes. |
US3331114A (en) * | 1965-08-04 | 1967-07-18 | Edward P Neufelder | Tube scaling device |
GB1498263A (en) * | 1974-02-18 | 1978-01-18 | Kagan A | Device for connection to a fluid-conveying line |
GB1531585A (en) * | 1977-05-12 | 1978-11-08 | Pilgrim Eng Dev | Rotary tool for removing deposits from tubular passages |
FR2555475A1 (fr) * | 1983-11-24 | 1985-05-31 | Gallo Michel | Procede de nettoyage ou de detartrage des refrigerants et condenseurs industriels et les moyens pour sa mise en oeuvre |
EP0171214A1 (de) * | 1984-07-19 | 1986-02-12 | Goodway Tools Limited. | Vorrichtung zum Wegnehmen von Ablagerungen in Röhren |
JPS6189500A (ja) * | 1984-10-06 | 1986-05-07 | Mitsubishi Heavy Ind Ltd | エアク−ラチユ−ブのスケ−ル除去方法 |
US6045302A (en) * | 1999-03-04 | 2000-04-04 | Orr; Pat | Drill bit retriever device |
EP1226865A2 (de) * | 2001-01-25 | 2002-07-31 | Nippon Shokubai Co., Ltd. | Verfahren zum Entnehmen von Feststoffmaterial aus einem Rohrbündelreaktor mit Wärmetausch |
DE10155282A1 (de) * | 2001-10-17 | 2003-06-12 | Wtr Plus Gmbh | Verfahren und Vorrichtung zur Innenreinigung von Kanälen eines Wärmetauschers |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4280852A (en) * | 1979-07-30 | 1981-07-28 | Dunham Heyward O | Metal tube cleaning method |
US4846895A (en) * | 1985-11-29 | 1989-07-11 | Foster Wheeler Energy Corporation | Remotely operated rotary tube cleaning system and method |
US5837062A (en) * | 1996-10-31 | 1998-11-17 | Shell Oil Company | Catalyst removal |
-
2003
- 2003-11-17 DE DE10353617A patent/DE10353617A1/de not_active Withdrawn
-
2004
- 2004-10-06 DE DE112004002211T patent/DE112004002211D2/de not_active Expired - Fee Related
- 2004-10-06 WO PCT/EP2004/011181 patent/WO2005050121A1/de active Application Filing
- 2004-10-06 RU RU2006121329/06A patent/RU2006121329A/ru not_active Application Discontinuation
- 2004-10-06 CN CNA200480033860XA patent/CN1882819A/zh active Pending
- 2004-11-17 US US10/989,277 patent/US20050109377A1/en not_active Abandoned
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB116332A (en) * | 1917-06-04 | 1918-06-04 | Ernest Forder | Improved Means for Cleaning Tubes. |
US3331114A (en) * | 1965-08-04 | 1967-07-18 | Edward P Neufelder | Tube scaling device |
GB1498263A (en) * | 1974-02-18 | 1978-01-18 | Kagan A | Device for connection to a fluid-conveying line |
GB1531585A (en) * | 1977-05-12 | 1978-11-08 | Pilgrim Eng Dev | Rotary tool for removing deposits from tubular passages |
FR2555475A1 (fr) * | 1983-11-24 | 1985-05-31 | Gallo Michel | Procede de nettoyage ou de detartrage des refrigerants et condenseurs industriels et les moyens pour sa mise en oeuvre |
EP0171214A1 (de) * | 1984-07-19 | 1986-02-12 | Goodway Tools Limited. | Vorrichtung zum Wegnehmen von Ablagerungen in Röhren |
JPS6189500A (ja) * | 1984-10-06 | 1986-05-07 | Mitsubishi Heavy Ind Ltd | エアク−ラチユ−ブのスケ−ル除去方法 |
US6045302A (en) * | 1999-03-04 | 2000-04-04 | Orr; Pat | Drill bit retriever device |
EP1226865A2 (de) * | 2001-01-25 | 2002-07-31 | Nippon Shokubai Co., Ltd. | Verfahren zum Entnehmen von Feststoffmaterial aus einem Rohrbündelreaktor mit Wärmetausch |
DE10155282A1 (de) * | 2001-10-17 | 2003-06-12 | Wtr Plus Gmbh | Verfahren und Vorrichtung zur Innenreinigung von Kanälen eines Wärmetauschers |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 010, no. 265 (M - 515) 10 September 1986 (1986-09-10) * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9126171B2 (en) | 2007-06-01 | 2015-09-08 | Basf Se | Process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed |
US9422218B2 (en) | 2007-06-01 | 2016-08-23 | Basf Se | Process for recharging the reaction tubes of a tube bundle reactor with a new fixed catalyst bed |
US8749364B2 (en) | 2011-11-01 | 2014-06-10 | Toyota Jidosha Kabushiki Kaisha | In-vehicle display apparatus, server, vehicle information display system, and communication method |
Also Published As
Publication number | Publication date |
---|---|
CN1882819A (zh) | 2006-12-20 |
RU2006121329A (ru) | 2008-01-10 |
DE112004002211D2 (de) | 2006-10-05 |
US20050109377A1 (en) | 2005-05-26 |
DE10353617A1 (de) | 2005-01-20 |
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