EP0195366A2 - Procédé et dispositif pour le nettoyage des conduits de fumée - Google Patents

Procédé et dispositif pour le nettoyage des conduits de fumée Download PDF

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Publication number
EP0195366A2
EP0195366A2 EP86103345A EP86103345A EP0195366A2 EP 0195366 A2 EP0195366 A2 EP 0195366A2 EP 86103345 A EP86103345 A EP 86103345A EP 86103345 A EP86103345 A EP 86103345A EP 0195366 A2 EP0195366 A2 EP 0195366A2
Authority
EP
European Patent Office
Prior art keywords
flue gas
expansion
inlet
gas pipe
outlet
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.)
Withdrawn
Application number
EP86103345A
Other languages
German (de)
English (en)
Other versions
EP0195366A3 (fr
Inventor
Kurt Antonschmidt
Ulrich Wirtulla
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.)
METASCO Chemische-Technische Produkte GmbH
Original Assignee
METASCO Chemische-Technische Produkte 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 METASCO Chemische-Technische Produkte GmbH filed Critical METASCO Chemische-Technische Produkte GmbH
Publication of EP0195366A2 publication Critical patent/EP0195366A2/fr
Publication of EP0195366A3 publication Critical patent/EP0195366A3/fr
Withdrawn legal-status Critical Current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
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0322—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid in combination with a plug, e.g. inflatable mole, to isolate a part of the tube
    • 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
    • B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
    • B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/48—Devices or arrangements for removing water, minerals or sludge from boilers ; Arrangement of cleaning apparatus in boilers; Combinations thereof with boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
    • 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

Definitions

  • the invention relates to washing processes for cleaning flue gas pipes with liquid cleaning agents and devices for performing this method.
  • the main cause of incomplete heat transfer in boilers is deposits of flue gas residues or lime on the combustion or water side. On the furnace side, these deposits consist of soot or mineral slags, which have to be removed at certain time intervals.
  • Chemical or chemical-physical cleaning agents have proven to be particularly suitable, as they are usually sprayed as an aqueous solution on the surface to be cleaned (wetting process) and penetrate the deposits, which can then be mechanically (washed or scraped off) or thermally (blasted off when Heating) from the firing-side wall.
  • the invention is therefore based on the object, while developing what is known from the prior art, to propose a method and a device for cleaning flue gas pipes, which makes it possible to use cleaning solutions known per se even in large boiler systems.
  • closure device expansion closure
  • the method can also be carried out using other closures adapted to the flue gas pipes and is not limited to the expansion closure dealt with as an example.
  • the flue gas pipe (1) to be cleaned is closed liquid-tight at its combustion-side and its smoke-chamber end (2) (3).
  • One of the two interchangeable closures preferably the more accessible firing closure (4), has a filling and an outlet opening (5) (6) which are connected by hoses to the pump (7) or to the expansion tank (8) containing the cleaning agent.
  • the filling opening (5) is equipped with a pipe section (9), which extends into the flue gas pipe (1) - hereinafter referred to as the inner pipe (9).
  • the inner tube (9) can extend as far as the end of the flue gas tube (3) opposite the outlet opening (6); this is to ensure that the largest possible part of the cleaning agent entering through the filling opening flows through the entire length of the flue gas tube.
  • the cleaning agent (10) removed from the expansion tank (8) or another storage container by the pump (7) flows through the filling opening (5) or the inner tube (9) into the flue gas tube (1) which is closed on both sides, displacing the air contained therein and flushes through the entire interior of the flue gas pipe (1).
  • the outlet opening (6) is as far as possible assigned to the upper part of the closure (4) in order to ensure that the space to be cleaned is completely filled.
  • the cleaning agent (10) flowing out through the outlet opening (6) can be discarded or, as shown in Fig. La, returned to the expansion tank (8), so that the cleaning agent (10) flows as a result in a closed circuit.
  • the flue gas pipe closures are each assigned only one filling or outlet opening (5) (6), the position of the outlet opening (6) defining the filling height of the pipe and therefore should be chosen so that the tube is filled as completely as possible.
  • the flushed out solid particles are settled by simple measures, such as an overflow (15) connected between the intake port (13) and the return (14).
  • the detergent still in the flue gas pipe is drained through the filling opening (5), whereby, if desired, a pump (7) that can be switched from pumps to suction or a rotation of the firing closure by 180 ° C accelerates the emptying.
  • the closures attached to the pipe ends are removed and can be attached to other flue gas pipes that are still to be cleaned.
  • the invention relates to devices for carrying out the cleaning process.
  • expansion closures are proposed which can be easily adapted to the pipe diameter used by the manufacturer.
  • FIGS. 2 to 5 show an expansion lock with inlet and outlet opening (5, 6);
  • Figures 2b and 3a relate to closures without a passage opening.
  • the inlet and outlet openings (5, 6) are guided as a horizontal bore through the axis (16) of the expansion lock.
  • the lower hole serves as an inlet opening (5) and the upper one as an outlet opening (6).
  • the inner tube (9) of the inlet opening is longer and thus extends deeper into the flue gas tube than the inner tube of the outlet opening (6), which is preferably designed as a short connecting piece (21). Particularly favorable flow conditions are formed when the inner tube (9) extends almost over the entire length of the flue gas tube, as shown schematically in FIG.
  • a flexible hose can be used as the inner pipe (9), which is adapted to the length of the flue gas pipe and is connected to the inlet opening (5) by means of conventional plug-in or other connecting means.
  • a particular advantage when using a flexible inner tube (9) is that (in contrast to what is known from the prior art) there is no great space requirement (as in the case of rigid tubes) for inserting the tube from the filling side. It is therefore possible to ensure filling even in openings that are difficult to access.
  • the expansion lock with inlet and outlet shown in Figure 2a is preferably inserted into the flue gas pipe from the firing side and clamped to the tight fit by means of the screw (20).
  • the expansion seal without a passage opening (FIG. 2b) is placed on the opposite opening of the flue gas pipe - preferably on the smoke chamber side - and clamped by means of the screw (20).
  • the outwardly projecting connecting pieces (22) and (23) for inlet and outlet are, as already described in the method, connected to the pump (7) and, if desired, to the expansion tank (8); the cleaning agent (10) is introduced and rinsed through until the coverings have been completely removed.
  • the cleaning agent (10) still in the flue gas pipe is drained through the inlet opening (5) or by rotating the expansion closure through 180 ° C through the outlet opening; the expansion locks on the firing end and on the smoke chamber end are released by releasing the screws (20) and removed from the pipe.
  • the cleaning process can then be continued on the next flue gas pipe.
  • the closure device required for this results from the expansion closure shown in FIG. 2a by omitting the feed opening (elements 22, 5 and 9).
  • the inner tube (21) is only designed as a short nozzle.
  • the procedure for cleaning pipes connected in series is described under the term "countercurrent principle" in the cleaning process.
  • the method of feeding and withdrawing from opposite sides which is explained on the basis of the schematic drawing lc, can also be easily implemented by expansion locks with only one feed or discharge.
  • a hollow cylinder (24) which can be screwed along the axis (16) and is designed to receive a head (26) mounted on a push rod (25).
  • a head (26) mounted on a push rod (25).
  • openings (27) which are intended for releasably receiving an axis (28) extending vertically through the head (26).
  • the thrust bearing (29) contains rotary locks (30) which are pressed outwards by springs (31) and are designed in such a way that they block rotary movements in the direction of closure.
  • the expansion lock is placed on the head (26) of the push rod (25) and inserted into the flue gas pipe by pressing the turnstiles (30).
  • the closure can now be pushed up to the smoke chamber opening of the flue gas pipe, with markings on the push rod indicating the required insertion depth.
  • lateral guide wings (32) are attached at certain intervals.
  • the push rod (25) is turned in the locking direction by means of the handle (33), whereby the two turn locks (30), pressed against the pipe wall by the springs (31), prevent the expansion lock from rotating lock.
  • the hollow cylinder (24) screws along the axis (16) in the direction of the counter bearing (29) and causes the tensioning disc (17) to press on the flexible hollow cylinder (19) and press it against the pipe wall until it closes tightly.
  • the fire-side opening of the flue gas pipe can be closed and the cleaning can be carried out as described above.
  • an expansion lock (34) (FIG. 4a) to be assigned to the smoke chamber-side opening (3) is proposed, which has a push rod (35) that can be disassembled into two or more parts along its axis, if desired ( Figure 4b) can be inserted and released from the firing opening (2) of the flue gas pipe.
  • the expansion lock consists of a threaded rod (36), a clamping ring (37) and an axially movable spacer ring (38).
  • the flexible hollow cylinder (24) made of flexible material is fitted between these two elements (37) and (38).
  • a clamping sleeve (39) is rotatably screwed onto the threaded rod (36).
  • the threaded rod (36) contains an element (41) prepared for receiving the central push rod (40) - for example a hexagon (41).
  • the clamping sleeve (39) contains recesses (42) for receiving the guide lugs (43) of the outer push rod (44).
  • the two-part push rod (35) consists of the outer push rod (44) and the inner push rod (40) which can be freely rotated therein.
  • outer and inner push rods each have handles (45) (46) or other elements for holding or carrying out radial rotary movements.
  • the recesses (47) or guide lugs (43), which are concordant to the elements (41) and (42), are provided.
  • the expansion chamber (34) on the smoke chamber side is thus fitted onto the two-part push rod (35) prepared for receiving the closure by means of the elements (43) and (47) and from the firing end (2) of the flue gas pipe to the smoke chamber end (3) of the pipe pushed, if desired a spacer (48) attached to the push rod (35) limits the maximum insertion depth.
  • the inner push rod (40) is locked by the handle (46) and by turning the outer push rod (44) by means of the handle (45) the expansion lock (34) to the fixed Screwed seat.
  • the guide lugs (43) can then be pulled out of the element (42) of the clamping sleeve (39) by slightly turning back the outer push rod and the entire push rod (35) can be removed from the firing opening (2) of the flue gas pipe.
  • the cleaning can be carried out in the manner described above.
  • the expansion lock (34) on the smoke chamber side is released in its seat by means of the push rod (35) and removed through the opening on the combustion side of the smoke gas pipe.
  • the push rods according to the invention can have guide rings (49) or guide wings (32) on their circumference, which serve a tube for better guidance of the rod. Furthermore, the push rods (25) or (35) can be broken down into sections of a certain length. This has the advantage that when the smoke chamber-side closure is introduced, a free distance corresponding to the length of the flue gas pipe is not required for attaching the push rod, but that the push rod can be extended by viewing sections in each case until the smoke chamber-side closure on the intended one Spot sits.
  • the invention further relates to an improvement of the flexible hollow cylinder (19), (24), which serves as a sealing element in expansion closures.
  • expansion closures can be fitted particularly tightly when the inner circumferential surface of the cylindrical hollow body (19), (24) has one or preferably a plurality of radially circumferential recesses (50).
  • opening on the combustion side means the opening of the flue gas pipe which is assigned to the side of the burner. Accordingly, the “smoke chamber opening” means the opening of the flue gas pipe assigned to the chimney.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cleaning In General (AREA)
EP86103345A 1985-03-14 1986-03-12 Procédé et dispositif pour le nettoyage des conduits de fumée Withdrawn EP0195366A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3509114 1985-03-14
DE3509114 1985-03-14

Publications (2)

Publication Number Publication Date
EP0195366A2 true EP0195366A2 (fr) 1986-09-24
EP0195366A3 EP0195366A3 (fr) 1988-05-18

Family

ID=6265166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103345A Withdrawn EP0195366A3 (fr) 1985-03-14 1986-03-12 Procédé et dispositif pour le nettoyage des conduits de fumée

Country Status (1)

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EP (1) EP0195366A3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1046863A1 (fr) * 1999-04-22 2000-10-25 Ralf Wiesel Procédé de nettoyage de la chambre de combustion et/ou des conduits de fumée d'une chaudière et dispositif associé
AT504287B1 (de) * 2006-08-23 2008-07-15 Vaillant Austria Gmbh Verfahren zur reinigung von abgaswärmetauschern eines heizgerätes
CN109812820A (zh) * 2019-03-26 2019-05-28 中再生环境科技有限公司 一种焚烧系统烟道高温在线清焦装置
EP4015977A1 (fr) * 2020-12-15 2022-06-22 Bosch TermoteknikIsitmaveKlima Sanayi Ticaret Anonim Sirketi Système et méthode pour éliminer les obstructions dans le chauffe-eau

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110344480B (zh) * 2019-07-17 2021-06-04 深圳市天德立科技有限公司 一种气动式管道清淤装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021265A (en) * 1957-07-05 1962-02-13 Chicago Bridge & Iron Co Multiple effect evaporating system
DE2645938A1 (de) * 1976-10-12 1978-04-13 Giancarlo Bettella Verfahren und vorrichtung fuer die reinigung und die beseitigung von verbrennungsrueckstaenden insbesondere bei heizkesselrohren

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1046863A1 (fr) * 1999-04-22 2000-10-25 Ralf Wiesel Procédé de nettoyage de la chambre de combustion et/ou des conduits de fumée d'une chaudière et dispositif associé
AT504287B1 (de) * 2006-08-23 2008-07-15 Vaillant Austria Gmbh Verfahren zur reinigung von abgaswärmetauschern eines heizgerätes
CN109812820A (zh) * 2019-03-26 2019-05-28 中再生环境科技有限公司 一种焚烧系统烟道高温在线清焦装置
CN109812820B (zh) * 2019-03-26 2023-09-26 中再生环境科技有限公司 一种焚烧系统烟道高温在线清焦装置
EP4015977A1 (fr) * 2020-12-15 2022-06-22 Bosch TermoteknikIsitmaveKlima Sanayi Ticaret Anonim Sirketi Système et méthode pour éliminer les obstructions dans le chauffe-eau

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Publication number Publication date
EP0195366A3 (fr) 1988-05-18

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