EP0343434B1 - Rohrkratzvorrichtung - Google Patents

Rohrkratzvorrichtung Download PDF

Info

Publication number
EP0343434B1
EP0343434B1 EP89108450A EP89108450A EP0343434B1 EP 0343434 B1 EP0343434 B1 EP 0343434B1 EP 89108450 A EP89108450 A EP 89108450A EP 89108450 A EP89108450 A EP 89108450A EP 0343434 B1 EP0343434 B1 EP 0343434B1
Authority
EP
European Patent Office
Prior art keywords
shaft
metal part
pipe
residues
discharge opening
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.)
Expired - Lifetime
Application number
EP89108450A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0343434A1 (de
Inventor
Michael Dr.-Ing. Hirth
Joachim Dr. Dr.-Ing. Jochum
Christian Dr.Rer.Nat. Wieckert
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.)
ABB Asea Brown Boveri Ltd
Original Assignee
ABB Asea Brown Boveri Ltd
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 ABB Asea Brown Boveri Ltd filed Critical ABB Asea Brown Boveri Ltd
Priority to AT89108450T priority Critical patent/ATE85245T1/de
Publication of EP0343434A1 publication Critical patent/EP0343434A1/de
Application granted granted Critical
Publication of EP0343434B1 publication Critical patent/EP0343434B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28G3/00—Rotary appliances
    • F28G3/08—Rotary appliances having coiled wire tools, i.e. basket type
    • 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"

Definitions

  • the invention relates to a pipe scraping device for the removal of residues deposited on the inner wall of a hot gas and / or vapor leading pipe during operation, with at least one scraping device which can be actuated by an axially extended shaft, with a bushing for the axially extended shaft and with at least one discharge opening for the removed residues.
  • a generic device is known from a magazine (Chem.-Ing.-Techn., Vol. 54, 1982, page 382, Fig. 4).
  • This device has a driven shaft which carries various axially extending scraping devices. When scraped radially, these scraping devices scrape off residues deposited on the inner wall. Both the central shaft and the scraper devices remain stationary in the interior of the device and are continuously heated by the hot ones flowing through this interior Gases and / or vapors are applied.
  • This device can therefore only be used in a temperature range of up to a few 100 ° C, since the scratching devices would melt at higher temperatures and could therefore no longer fulfill their function.
  • the use of more temperature-resistant materials for the scratching devices, for example ceramics, in order to achieve a higher operating temperature, does not make sense, since these are not mechanically resilient and are also very difficult and expensive to machine.
  • a massive cutting tool for pipe cleaning is known from FR-A-397.008, which closes almost the entire pipe cross section during the cutting process. This cutting tool is not suitable for work during the operation of the pipe to be cleaned and also not for use at high temperatures.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of creating a pipe scraping device with which residues can be removed from areas exposed to temperatures above 1300 ° C. with simple means.
  • the advantages achieved by the invention are essentially to be seen in the fact that known materials, e.g. Steel that is comparatively easy to machine can be used.
  • the scratching device is used periodically and only for such a long time in the area of high temperatures that it does not warm up appreciably and thus cannot lose its mechanical strength.
  • the temperature range in which this device operates can thus be increased to over 1300 ° C. with simple means.
  • the single figure shows an embodiment of a device according to the invention.
  • a device according to the invention is shown in the single figure.
  • a cooler 2 made of ceramic with a cylindrical interior 3 and cooling tubes 4 embedded in the wall is flanged to an opening in the outer wall 5 of a furnace.
  • An arrow 6 indicates the direction of flow of hot gases and / or vapors which emerge from the furnace and which are cooled in the cooler 2.
  • portions of the hot gases and / or vapors condense or desublimate and settle on the inner wall 7 of the cooler 2.
  • the cooled gas leaves the cooler 2, as indicated by an arrow 8, through a flanged connection piece 9.
  • a cylindrical cavity 10 is provided in its axial extension, which has the same diameter as the cooler 2 and which is completed by an end wall 11.
  • the walls of this cavity 10 are made of steel, for example, a ceramic lining is not necessary here because of the lower temperatures.
  • a bushing 12 for a rotatable, axially extending shaft 13 which at the same time guides this shaft 13.
  • a metal part 15 is attached to the tip 14 of this axially extending shaft 13, which is helically wound in the axial direction and has, for example, approximately 1 1/2 turns.
  • This dimensionally stable metal part 15 forms the actual scratching device of this device.
  • a discharge opening 16 is provided at the bottom at the lowest point, to which a collecting container 17 is flanged. When changing the collecting container 17, the discharge opening 16 can be closed by means of a slide 18, which is only indicated here.
  • the cooler 2 the hot gases and / or vapors entering the oven at more than 1300 ° C. are cooled. Condense or desublimate during this cooling process Residues and are deposited on the cooled inner wall 7 of the cooler 2. These residues can be raw materials produced in iron and steel works, but they can also be pollutants, for example, that are removed from contaminated gas-steam mixtures. Furthermore, this cooler 2 can be an assembly whose functionality is impaired by these residues. To remove these residues, the axially extending shaft 13 is now set in rotation by a drive, not shown, and at the same time displaced in the axial direction.
  • the feed and the rotational speed are matched to the slope of the turns of the metal part 15 such that it is moved in the tubular interior 3 of the cooler like a corkscrew against the flow direction indicated by the arrow 6.
  • the clear flow cross section of the cooler 2 is thereby only insignificantly reduced. This screwing movement prevents residues from being scraped off the inner wall 7 and pushed towards the hot zone of the cooler 2 on the oven side, where they would melt or evaporate again.
  • the metal part 17 is pulled back into the rest position by the shaft 13, scrapes off the residues from the inner wall 7 and transports them to the discharge opening 16.
  • This movement sequence from the rest position of the Scraper device in the hot zone and back to the rest position in the cooler area of the tube takes place in a comparatively short time, so that the metal part 15 cannot reach the predetermined limit temperature for its application.
  • the sequence of movements is repeated periodically.
  • the rotational movement can be maintained in the same sense as with the corkscrew-like forward screwing if a particularly good scratching effect is to be achieved.
  • the metal part 15 can also be withdrawn without this rotary movement. It is beneficial if the edge of the metal part 15, which is stressed during the scratching process, is ground particularly sharp and is designed as a scratching edge. With certain residues, it can also make sense to harden these scratched edges.
  • the metal part 15 can be designed such that it just fits into the cylindrical interior 3, but it can also be designed to be resilient in such a way that it presses against the inner wall 7 with spring force. In this way, it is also possible to scrape off baked-on residues and to transport them into the collecting container 17.
  • a gap of, for example, 0.5 mm thickness can also be provided between the metal part 15 and the inner wall 7, with the result that a corresponding layer of residues always covers the inner wall 7.
  • Such an embodiment has the advantage that the inner wall 7 is protected against signs of corrosion when aggressive gases and / or vapors have to be cooled.
  • the metal part 15 is not subjected to high temperatures in the rest position and therefore does not lose its internal strength and dimensional stability, but it does assume the temperature prevailing in the area of the connection piece 9 which forms the outlet of the cooler 2. At the beginning of the screwing movement of the metal part 15 out of the rest position, there is therefore no fear of a temperature shock when the metal part 15 comes into contact with the ceramic part of the cooler 2.
  • a prototype of such a device has been successfully put into operation.
  • a 1 m long ceramic tube with cemented-in cooling tubes 4 for water cooling is used as the cooler 2.
  • the ceramic tube has an inner diameter of 10 cm.
  • the metal part 15 consists of an externally suitably ground spiral spring with a constant pitch, of which one and a half turns are used.
  • the axially extending shaft 13, with the tip of which the metal part 15 is connected, is made of steel with a 10 mm diameter.
  • a gas mixture at a temperature of approximately 1300 ° C. was fed into the device under normal pressure.
  • This gas mixture contained 95% air, 2% gaseous heavy metal compounds, especially ZnCl2, PbO, PbCl2 etc., and 3% other parts such as CO2, SO2, etc.
  • the device can also be gas-tight if harmful gases and / or vapors are to be cooled, and it is also conceivable to operate it with excess or negative pressure.
  • the bushing 12, the flange connection between the discharge opening 16 and the collecting container 17, the slide 18 and the transition between the outer wall 5 of the furnace and the cooler 2 must be made gas-tight and possibly also pressure-tight.
  • the cooler 2 is inclined downwards in the direction of the discharge opening 16. This gradient facilitates the removal of the scraped-off residues and prevents liquid condensing material from flowing back into the furnace. Different temperature zones occur in the interior of the cooler 2, and it is entirely conceivable that a certain fraction of the residues is deposited in a particularly high concentration in a certain temperature zone. This fraction can now be removed through an additional discharge opening, not shown. The further processing of the residues is simplified by this fractionally separate discharge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Cleaning In General (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electric Cable Installation (AREA)
  • Pipe Accessories (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP89108450A 1988-05-27 1989-05-11 Rohrkratzvorrichtung Expired - Lifetime EP0343434B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89108450T ATE85245T1 (de) 1988-05-27 1989-05-11 Rohrkratzvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2034/88 1988-05-27
CH2034/88A CH677739A5 (enrdf_load_stackoverflow) 1988-05-27 1988-05-27

Publications (2)

Publication Number Publication Date
EP0343434A1 EP0343434A1 (de) 1989-11-29
EP0343434B1 true EP0343434B1 (de) 1993-02-03

Family

ID=4224377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108450A Expired - Lifetime EP0343434B1 (de) 1988-05-27 1989-05-11 Rohrkratzvorrichtung

Country Status (5)

Country Link
US (1) US4986347A (enrdf_load_stackoverflow)
EP (1) EP0343434B1 (enrdf_load_stackoverflow)
AT (1) ATE85245T1 (enrdf_load_stackoverflow)
CH (1) CH677739A5 (enrdf_load_stackoverflow)
DE (1) DE58903430D1 (enrdf_load_stackoverflow)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0359931B1 (de) * 1988-09-05 1993-03-31 Asea Brown Boveri Ag Verfahren zur Trennung von dampfförmigen Schwermetallverbindungen von einem Trägergas und Vorrichtung zur Durchführung des Verfahrens
US5070568A (en) * 1990-03-05 1991-12-10 Orville L. Wilcox Cleaning device for cleaning nozzle and welding tip of a wire feed electrical arc welder
DK0682764T3 (da) * 1993-02-12 2000-03-20 L David Ostlie Kølerist og anlæg til forsyning af et kraftværk med varme
DE19641629A1 (de) * 1996-10-09 1997-10-23 Siemens Ag Vorrichtung zur Reinigung einer Rohrleitung
KR20020031823A (ko) * 2000-10-24 2002-05-03 김동수 파우더 고착 방지 수단을 구비한 배기가스 이송 파이프
CN100376859C (zh) * 2003-06-13 2008-03-26 株洲工学院帅科机械清洗研究所 一种传热流体动力强化的污垢清洗塑料螺旋装置
GB0326707D0 (en) * 2003-11-17 2003-12-17 Boc Group Plc Exhaust gas treatment
CN1657189B (zh) * 2004-02-16 2010-05-12 湖南工业大学 一种管内污垢旋转清洗件固定机构的动力矩强化装置
JP5824906B2 (ja) 2011-06-24 2015-12-02 昭栄化学工業株式会社 金属粉末製造用プラズマ装置及び金属粉末製造方法
EP3015810A1 (en) * 2014-10-30 2016-05-04 Vesta Srl Stove provided with a heat exchanger with turbulators
CN105347400B (zh) * 2015-12-04 2016-11-09 湖北中澳纳米材料技术有限公司 一种生产高纯纳米三氧化钼的装置及方法
CN107030292A (zh) * 2017-05-03 2017-08-11 江苏天楹环保能源成套设备有限公司 一种多级冷却制备金属粉末的等离子体雾化装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE46485C (de) * P. STEMPEL in Aachen, Wespienstrafse 33 Federnder, schraubenförmiger Wasserröhren-Reiniger
FR397008A (fr) * 1908-11-20 1909-04-27 Paul Montravel Tennick Perfectionnements apportés aux appareils destinés à enlever les incrustations de l'intérieur des tubes, tuyaux ou organes analogues
US1690434A (en) * 1926-12-21 1928-11-06 Rockelman Louis Boiler-pipe cleaner
US3410335A (en) * 1965-02-13 1968-11-12 Svenska Carbon Black Aktiebola Coolers for mixtures of gases and solid particles
JPS52129714A (en) * 1976-04-24 1977-10-31 Kurosaki Refractories Co Refractories compounded with silicaaadded fused alumina
JPS5945032B2 (ja) * 1977-04-20 1984-11-02 三井造船株式会社 コ−クス炉ガスの顕熱回収装置
JPS5535912A (en) * 1978-09-06 1980-03-13 Mitsui Toatsu Chemicals Pipe inside scratchinggoff device
JPS6129699A (ja) * 1984-07-23 1986-02-10 Nitto Boseki Co Ltd 高温含塵ガス用熱交換器
JPH06129699A (ja) * 1992-10-13 1994-05-13 Taikisha Ltd 空調空気吹出装置

Also Published As

Publication number Publication date
ATE85245T1 (de) 1993-02-15
CH677739A5 (enrdf_load_stackoverflow) 1991-06-28
EP0343434A1 (de) 1989-11-29
DE58903430D1 (de) 1993-03-18
US4986347A (en) 1991-01-22

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