DE2631902A1 - DEVICE AND METHOD FOR CLEANING THE INSIDE OF A BOILER - Google Patents

Description

Τ.ΕΟΤΚΕ - BüHLING - KlNNE - GlMJPB

Dipl.-Chem. Bühling Dipl.-Ing. Chins Dipl.-Ing. Group

Bavariaring 4, P.O. Box 20 24 8000 Munich 2

Tel .: (0 89) 53 96 53 -

Telex: 524 845tipat

cable. Germaniapatent Munich

July 15, 1976

B 7472 / ICI case Py 28046/28871

Imperial Chemical Industries Limited
London, UK

Apparatus and method for cleaning the
Inside a boiler

The present invention relates to a Device for cleaning the inside of a boiler. ■

It is known for the purpose of cleaning a surface ejecting a jet of liquid, usually water, through a nozzle under high pressure. An important example of such use is in cleaning the interior of boilers such as B. chemical reaction vessels, reactors, and in particular polymerization reaction vessel, wherein the

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Dresdner Bank (Munich) Account 3939 844 Postscheck (Munich) Account 670-43-804

2631802

High pressure liquid jet for removing or loosening Polymer residues stubbornly adhering to the inner surfaces of the reaction vessel can be used. This kind Process is known as hydrodynamic cleaning and becomes often used, e.g. B. in the cleaning of autoclaves that are used for the production of vinyl chloride polymers.

The commercial equipment for performing hydrodynamic cleaning contains on a rotatable support a variety of nozzles for the delivery of high pressure water jets at variable angles. The carrier can be expedient be arranged within the reaction vessel, e.g. B. centrally along the main longitudinal axis of the reaction vessel, so that the rays can reach most parts of the surfaces to be cleaned.

However, such an arrangement has the disadvantage that the nozzles are normally at a considerable distance from the surfaces to be cleaned, so that the rays tend to diverge and lose much of their cleaning power. In addition, the shapes of many reaction vessels are such that some parts of their inner surfaces are not exposed to the rays can be touched and thus not be cleaned.

In US-PS 3 827 634 it was proposed to overcome these disadvantages by means of an improved device,

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in which the nozzles are supported at the ends by arms, the arms being mounted on a central support. The arms radiate out from the wearer (similar to the spokes of an umbrella) so that they can move during the Cleaning process are arranged in a single fixed divergent position, so that the nozzles are closer to Surface of the reaction vessel. The carrier can order its longitudinal axis can be rotated so that the surface of the reaction vessel can be flooded with the jets of high pressure fluid. With such a structure, the Difficulty holding the wearer with his attached arms to be introduced into a reaction vessel, which has a relatively small inlet opening, as it is, for. B. found in most polymerization autoclaves. This is in a current state of the art construction, by arms fixed, which are collapsible so that they can be inserted into the reaction vessel (and when it is subsequently extended) are essentially parallel to the longitudinal axis of the carrier, whereby they have a narrow profile which can be introduced through the inlet opening of the reaction vessel. As soon the device is inside the reaction container, the arms can radially (in the umbrella-like manner) from the support axis into the only fixed position, can be extended and are ready for cleaning. In this known structure, the arms are only in the folded position (for inserting and withdrawing the device) and in the only fixed extended position

Position (during the cleaning process) can be held in place.

However, it has been found that even this improved device in terms of variable geometry some. Surfaces, as found in most reaction vessels, is not entirely satisfactory. E.g. are in most cylindrical polymerization reaction vessels the lid (through which the introduction takes place) and the bottom of a curved shape, so that the arms are unsuitable in their only fixed, extended position for cleaning are to position the nozzles close to all parts of these curved surfaces. In the well-known Device, the nozzles at the ends of the arms are self-rotating, which to some extent overcomes this disadvantage, so that the rays remove those parts of the surfaces of the reaction vessel which are from the ends of the arms can lie, clean. However, it has been found that this device is not yet fully effective, z. B. the rays tend to. diverge, lose their cleaning power and even then do not always reach certain areas of the surface of the reaction container (e.g. you may encounter obstacles such as an agitator, agitator cap or other protrusions that block the path of the Interrupt beams).

A device was developed which the

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Disadvantages of the known hydrodynamic cleaning device discussed above no longer has.

In accordance with the present invention there is an apparatus supplied for hydrodynamic cleaning of the inside of boilers which contains:

a) A central support, which can be rotated or swiveled around the longitudinal axis of the support,

b) at least three arms that extend from the wearer and distributed about the longitudinal axis in a balanced arrangement, each arm has at least one nozzle at its outer end for ejecting cleaning fluid,

c) a device for conducting the cleaning liquid to each nozzle,

d) a device for rotating or pivoting the girder about its longitudinal axis,

e) a device to each arm in arrestable end positions, which with respect to a to the longitudinal axis vertical plane are applied or pushed forward, and in optionally fixable layers between

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see this laid out or advanced Able to bring.

The terms "longitudinal axis", "perpendicular to the longitudinal axis Level "," created "and" advanced "can be easily understood from the accompanying drawings. For example, in Fig. 1 the longitudinal axis is a vertical line which passes through the center of the carrier while the arms 4 in Fig. 1 are in a plane perpendicular to the axis. In Fig. 2 the arms - represented by the non-dotted line Line - laid out in position A, while the arms - represented by the dotted line - in position B. are advanced.

The arms of the device of the invention can be in a balanced arrangement around the longitudinal axis of the Be distributed carrier, i.e. in an arrangement so that the reaction forces of the liquid jets are in use compensate the device itself. This is a matter of customizing each device in accordance with it Invention, however, is most effective when the arms are distributed at the same angular distance around the longitudinal axis; preferably (to facilitate construction and procedure) the ends of the arms are in a common plane perpendicular to the longitudinal axis (as in Figs. 1 and 3). The poor

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are for easier balance and uniformity the cleaning effectiveness, preferably of the same length. However, it is possible to use arms that aren't are all of equal length; This expedient can be used in cases where one or more arms have facilities such as a thermocouple container or damage a baffle can be useful. For the convenience of construction and. - the operational effectiveness it is preferred to use three arms (see Figures 1 and 3).

The applied and advanced end positions are preferably those in which the arms are essentially to Longitudinal axis are parallel. By "substantially parallel" is meant completely parallel or within 30 to for perfect parallelism. The end positions are usually determined by the device's own geometry. In Fig. 1 and 3, for example, the arms can be completely parallel in the applied position, but only within 20 ° be rotated to perfect parallelism in the advanced position, since the unit 8 prevents further rotation. .

The rotation of the arms can, if desired , be made in a controlled manner while the carrier rotates or pivots about its longitudinal axis; the rotation of the arms as well as the rotation or torsional vibration of the carrier

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can with the device moved as a whole (e.g. along the interior of the reaction vessel) or stationary are executed. This is best achieved when the actuations of devices d) and e) completely are independent of each other.

The device of the invention has the significant advantage that the rotation or torsional vibration of the carrier with its connected arms and the ability of these arms to move into selected positions that can be held between the end positions To rotate as described above, it the nozzles in cooperation with the movement of the device as a whole along the interior of a vessel such as a chemical reaction vessel, allowed to close to a location to get to almost every part of the boiler surface, so that an extreme cleaning effectiveness can be achieved.

In the case of a cylindrical reaction vessel (used for many polymerization reactions), the one Has dome- or Taippen-shaped lid and base, the can Introduction into the reaction vessel through a relatively narrow opening in the lid of the reaction vessel with full tcomines arms raised so that they are substantially adjacent (i.e. along the longitudinal axis) of the wearer (in the manner of the spokes of an unopened umbrella), the carrier with its attached arm ends first into the

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Reaction vessel enters; ie the arms are parallel to the longitudinal axis of the carrier and are applied to the carrier. When the support and arms are within the reaction vessel beyond the depth of the arms, the arms can be rotated radially outward so that the arms, and thereby the nozzles, can follow the curvature of the domed lid of the reaction vessel (the device as a whole being stationary while liquid is expelled through the nozzles under high pressure (the liquid supply is turned on after the arms have rotated sufficiently to clear the opening) the head rotates or swings to ensure full circumferential contact by the jets. During such rotation, the arms can be held in a selected position for as long as necessary for effective cleaning before rotation is continued. The rotation is advantageously carried out according to a preselected sequence, which can be automated. When the Poorer reach ine "^ wlTjcirenl age, which is at or beyond the lower end of the dome lid, so as to the curvature of the upper _-K. U-PPE-v © lTRommen are followed (for example, the arms then form an angle of 90 with the longitudinal axis or - in other words, they can be found in a plane perpendicular to the longitudinal axis), the device can be moved as a whole along the cylindrical part of the reaction container, the arms being held in this intermediate position (but with the carrier still rotate or swing) and the

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Nozzles continue to eject liquid under high pressure so as to protect the inner cylindrical wall of the reaction vessel to clean. As the arms approach the lower crest, the movement of the device as a whole along the Reaction vessel are stopped; the arms now rotate further away from their starting position so that the arms and the connected nozzles in a manner similar to the upper dome of the curvature of the bottom of the reaction vessel follow (while still turning or swinging with the carrier). When the cleaning process is complete, you can the arms are withdrawn to the original position for insertion and the device out of the reaction container be lifted out.

Accordingly, the invention also provides a method for hydrodynamic cleaning of the interior of a cylindrical chemical reaction vessel, the domed has upper and lower ends using a device as described herein. This Method comprises the following steps.

a) insert the device into the upper part of the reaction vessel so that the arms are in relation are placed on a plane perpendicular to the longitudinal axis of the girder,

■ - ■■■■. 2831902

b) rotating the arms with the device stationary as a whole, to follow the curvature of the lid and the bottom, with liquid at the same time is ejected through the nozzles under high pressure and the carrier rotates or swings,

c) moving the device as a whole along the cylindrical part of the reaction vessel while liquid under high pressure continues to be ejected through the nozzles and the wearer himself rotates or swings in rotation after the arms make their following movement along the curvature of the upper one Have ended and the arms have been held in this position,

d) stopping the movement of the device as a whole near the lower dome and rotating the arms with the device standing as a whole, around the curvature the lower crest so that the arms To attain positions which in relation to a to the longitudinal axis of the support vertical plane are advanced, with constantly liquid under high Pressure ejected through the nozzles and the Dre ~ hung or torsional vibration of the carrier continued will,

e) lifting the device out of the reaction zone

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after cleaning is completed.

It goes without saying that the length of the arms corresponds to the size and shape of the reaction container to be cleaned must, d. That is, so that the nozzles connected to the arms are brought very close to the surface of the reaction container during the cleaning process. As a result, you can the arms when the cleaning system according to the invention for cleaning reaction vessels with very different Dimensions should be used, with suitable adjustment depending on the size and shape of the reaction vessel to be cleaned, be adjustable in length. Alternatively, the device can be designed for detachable arms, The arm length used corresponds to the dimensions of the reaction container to be cleaned.

As discussed above, it might be impossible to rotate the arms about a perfectly parallel forward one or to reach the laid-out location. Thus, as mentioned above, the geometry of the device can prevent the arms can be pulled up completely parallel to the longitudinal axis. Equally, equipment, e.g. B. a paddle stirrer at the bottom of the reaction vessel inside the reaction vessel prevent the arms from being put on Position can be turned completely away, so that it is completely parallel to the longitudinal axis but in the opposite direction

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set direction v / ären (i.e. in the advanced position). However, this does not affect the effectiveness of the device in practice. For example, in the case of a paddle agitator at the bottom of the reaction vessel the device can be moved as a whole until the arms are able to to release the blades as they continue to rotate. Likewise the jets emitted may be inclined with respect to the axes of the arms in order to clean the to allow the deepest parts of the reaction vessel, even if the arms are not completely in the extended position are parallel to the longitudinal axis.

The actual number ¹ of lockable spacers between the end positions depends on the rotating system used, although it is possible to devise systems which, for practical purposes, allow any selected spacer to be held in place.

In order to achieve effective flushing in the circumferential direction, the carrier can rotate or oscillate in rotation. if a rotary oscillatory motion is used, it is preferred that the jets from nozzles of adjacent arms merge into one Overlap a small area in order to achieve maximum flushing effect. For example, in the case of a Device with three arms that have a distance of 120 °, these swivel by 150 ° so that the rays

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Paint the boiler wall rait 30 in the circumferential direction. When the carrier rotates, the movement of the device as a whole along the boiler can thus be determined that a corresponding overlap angle for effective flushing is achieved.

If a torsionally oscillating carrier is used, the corresponding oscillating movement requires the connected Arms careful control so that the carrier is preferably attached to a rigid structure, such as a solid one supporting steel column, which can be raised and lowered to facilitate the movement of the device to be able to run as a whole into, inside and out of the reaction vessel. A rotating carrier is required on the other hand, not so careful control of the position of the arms, so a simple lifting device is used can be. For this reason, the device of the invention preferably uses a rotating support, wherein the carrier can be connected to a non-rotating member of the device by means of a pivot bearing.

A preferred device for rotating the arms has an axial center screw carried by the bracket and worm gears meshing with the worm, each worm gear having an inner end of an arm is housed.

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The cleaning fluid is one for hydrodynamic Cleaning fluid known to be effective; it is preferably a liquid, especially water. Mixtures of liquid and gas e.g. B. water with water vapor and air are also envisaged. The pressures which are used for the liquid during cleaning are those which are used for hydrodynamic cleaning as are effectively known.

The high pressure liquid can enter the device can be fed in through an outer hose each with the nozzles on each arm for their supply are connected, the hose of each arm having sufficient slack to allow the rotation of the Armes adapt. In the case of a rotating wearer, the fluid supply to the arm hoses can be through channels be passed through the sealed pivot bearing and through the carrier. In another version, can directing the liquid from the channels in the carrier through channels within each arm rather than through arm tubes to the nozzles will. In the case of a torsionally oscillating carrier, hoses can be used as in the case of a rotating carrier but the outer hose can be attached directly to the torsionally oscillating Carrier to be connected. In fact, in the device according to the invention, each of the

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A device suitable for the nozzles can be used.

Each arm can have an or at its outer end
carry multiple nozzles. A double nozzle arrangement, ie a nozzle which is provided with an internally divided bore,
in order to deliver zv / ei jets of liquid lying next to one another at a distance is advantageous. In contrast to the equipment proposed so far, however, it is of no importance for the nozzles that they are rotated while the equipment is in use, since they are always very close to the ones to be cleaned. Reaction vessel walls can be brought. In reality it is preferable that the nozzles are fixed at the arm ends (i.e. not rotatable) and that the exiting jet directions can be along the axis of the arms or form an acute angle with the axis of the arms (e.g.
up to 20 °). The direction of the exit jet depends on the direction of the exit bore in the nozzle and on the direction in which the fixed nozzle is in relation to the
Arm shows off. It is advantageous to use a double nozzle arrangement in which the jet directions emerging from each nozzle run along or with the axis of the arm
make an acute angle with the axis of the arm to diverge or remain parallel to each other.

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The actuation and control of the device according to the invention during the cleaning process, e.g. the actuation of a motor designed to insert the device into the reaction vessel to a proper initial depth of penetration provides, followed by further preselected movements of the device as a whole within the reaction vessel, the torsional vibration or the rotation of the support, the controlled umbrella-like rotation of the arms around the head in selected holdable positions, the expulsion of liquid under high pressure, during the cleaning process , and the final lifting of the device from the reaction vessel, can be done by a automatic control device are executed. Such a device can, for. B. use a pneumatic system and the complete cleaning process can be programmed to operate automatically, e.g. B. clv. :H a control box arranged in the vicinity of the reaction vessel.

In addition to reaction vessels, the device according to the invention can also be used for cleaning other vessels be e.g. B. Drying kettle.

The invention is explained in more detail below with reference to schematic drawings of two exemplary embodiments.

8 6/033 7 ^{0R! G |} nal inspected

FIG. 1 is a schematic representation of an embodiment of an apparatus according to FIG Invention in a perspective view,

Figure 2 is a schematic representation of the device of Figures 1 and 3 in two positions inside the reaction container, which is cleaned by this,

Fig. 3 is a schematic representation of another embodiment according to the invention in more perspective Opinion.

According to FIG. 1, the device contains a support which is connected to a steel column 2 and which is designated generally by 1 is. The carrier can pivot about its longitudinal axis (the imaginary vertical line through the center of the Carrier), the torsional vibration being caused by a pneumatic piston cylinder unit 3. Three of a kind Angled arms 4 of equal length are attached to the support, v / ob ei the outer end of the arms nozzles 5 wearing. The direction of the jet exiting from each nozzle is along the axis of the arm (alternatively, the direction can be of the exiting beam form an acute angle with the axis of the arm). The inner ends of the arms are in

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Worm wheels 6 housed, which with an inside of the housing 7 housed screw are engaged. As can be seen, the inner ends of the Arms 4 in a common plane, soft perpendicular to the Longitudinal axis of the carrier is. The arrangement of worm and worm wheels is operated by a pneumatic actuation unit 8, so that the arms 4 correspond to the type of umbrella rotated to be able to achieve any desired angle with the longitudinal axis, i. H. she can essentially be in any selected fixable position between being perfectly parallel to the longitudinal axis, taking them to applied to the carrier, and advanced and substantially parallel to the axis (the unit 8 prevents perfect Parallel position of the arms when they are in the advanced position), rotated v / ground. High pressure water can through the Outer hose 9 will be delivered to the device the water supply is divided into three ways and is carried out through the arm hoses IO to each nozzle; these hoses are connected to pipes 11 which unite with arms 4 near the nozzles.

The device can be passed through the steel column as a whole 2 when using a suitable motor (not shown) be lowered or lifted off.

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A similar embodiment of the invention is shown in FIG. 3, the most important difference from the embodiment according to FIG. 1 being that the carrier 1 is rotatable about its longitudinal axis (connected by a sealed pivot bearing - not shown - to an upper one non-rotating part of the device). The rotation is effected by a pneumatic motor 12. Water under high pressure, which is supplied through an outer hose 9, is passed through inner channels in the pivot bearing and in the carrier and from there through the arm hoses 10 to the nozzles 5. The nozzles 5 are double nozzles, ie they have a split inner bore _{r to} expel two adjacent water jets, one below the other, both jets running along the axis of the arm. (Alternatively, the exiting rays can form an acute angle with the axis of the arms, either diverging or being parallel to each other).

The device can be raised or lowered as a whole by an elevator 13 using a suitable motor will.

With reference to FIG. 2, the preferred operation of the device according to FIGS. 1 and 3 will now be described. Position A in Fig. 2 shows the device after it has passed through the inlet opening of the cylindrical to be cleaned

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Reaction container 12 has been lowered with the arms 4 applied and completely parallel to the axis (as an unopened umbrella). In this position, in which the arms are completely inside the reaction vessel and the device as a whole stands still, the carrier is set in torsional vibration (FIG. 1) or rotation (FIG. 3) and the arms slowly, e.g. B. gradually rotated outwards in the worm gears. High pressure fluid, ζ. Β. Water, is delivered to the wearer as soon as the nozzles are through the inlet opening (are the directions of the exiting jets inclined accordingly to the axis of the arms, it is alternatively not necessary that the nozzles open the entrance opening first) · In this way the upper dome 13 of the reaction container is cleaned by the torsional vibration or rotation of the liquid jets. When the arms are inclined close to 90 ° to the longitudinal axis of the wearer (as indicated by the dotted line that lines the arms 4 is shown in position A) d. H. if they are in a plane which is substantially perpendicular to the Is the longitudinal axis and corresponds to a position that just exceeds the beginning of the cylindrical wall 14 of the reaction vessel the rotation of the arne in the worm wheels is interrupted and the device as a whole in the reaction vessel moved downward (while it swings or rotates) so as to clean the cylindrical wall 14 ... In the position marked by B in Fig. 2 (just before

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to the. arched bottom 15) is the movement of the device interrupted as a whole and the arms continue to rotate in the worm wheels (while they are still swinging with the head or rotate) so that the surface of the lower dome is cleaned. It goes without saying that, the rotary motion the arms in the worm wheels is limited when z. B. a scoop! Agitator at the bottom of the reaction vessel except when the device is raised so that the arms do not contact the blades; these However, the latter measure is not necessary if the direction of the exiting rays with the arms is a corresponding one Form acute angles because the inclined jet cleans the deepest parts of the reaction container without that further rotation of the arms is required.

When the cleaning process is complete, the arms are rotated back to the upper vertical position (i.e., completely parallel to the longitudinal axis in the applied position) and the device is lifted out of the reaction vessel. The operation and control of the device during the cleaning phase can be through an automatic pneumatic control system (not shown) are executed.

It goes without saying that the embodiments of the invention described above do not limit the scope of the invention, that many other designs, which modifications

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genes may fall within the scope of the invention. For example, the water supply may be through channels within the arm bodies rather than through arm hoses 10 to the nozzles be directed. Each end of the arm can e.g. B. instead of a double nozzle arrangement carry two separate nozzles, which can also eject two adjacent jets of water at any acute angle to the arm axis can lie. Likewise, the nozzles can be used to deliver more than two water jets with appropriate inner holes are built. For example, instead of being stepped as in FIGS. 1 and 3, the arms can be perfectly straight.

The invention thus provides an apparatus for hydrodynamic cleaning of the inside of a boiler, which contains:

a) a central beam, which around the longitudinal axis the carrier is rotatable or rotatable;

b) at least three spreading from the carrier and arms distributed around the longitudinal axis in a balanced arrangement, each arm on its outer one End of at least one nozzle for ejecting cleaning fluid Has;

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c) a device =: ura conducting cleaning fluid to each nozzle;

d) a device for rotating or pivoting the carrier about its longitudinal axis;

e) a device with which the arms can be held in place End positions, which in relation to a to Longitudinal axis vertical plane are created or advanced and in. Optionally fixable Intermediate layers of this applied and advanced layer can be rotated or pivoted "

Claims (14)

Patent claims: 1. Device for the hydrodynamic cleaning of the interior of a boiler, characterized by a) a central support (2) which can be rotated or pivoted about the longitudinal axis of the support, b) at least three arms (4) extending from the wearer spread out in a balanced arrangement around the longitudinal axis, with each arm (4) for expulsion of cleaning fluid has at least one nozzle (5) at its outer end, c) a device for conducting cleaning liquid to each nozzle (5), d) a device for rotating or pivoting the carrier (5) about the longitudinal axis, e) a device for rotating the arms (4) in arrestable end positions, which with respect to a to Longitudinal axis vertical plane are created or advanced, as well as in optionally fixable Intermediate layers of this applied and advanced layer 809886/0337 2. Device according to claim 1, characterized in that that the arms (4) are distributed at the same angular distance around the carrier (5). 3. Apparatus according to claim 1 or 2, characterized in that each arm (4) through the device e) in the applied or advanced end position, which is essentially parallel to the longitudinal axis of the carrier (5), is rotatable is. 4. Device according to one or more of the preceding claims, characterized in that the arms (4). are of the same length. 5. Device according to one or more of the preceding Claims, characterized in that the inner ends of the arms C4) are in a common to the longitudinal axis of the carrier (5) are vertical plane. 6. Device according to one or more of the preceding claims, characterized in that the device e) an axial central worm carried by the carrier (5) and worm wheels (6) meshing with the worm having, the inner end of an arm (4) being accommodated in each worm wheel (6). 609886/0337 7 “Device according to one or more of the preceding Claims, characterized in that the devices d) and e) are completely independent of one another are operable. 8 »Device according to one or more of the preceding Claims, characterized in that the nozzle a (5) are non-rotatable at the ends of the arms (4) and essentially follow directions of the exiting rays the axis of the arms (4) lie » 9. The device according to one or more of the preceding claims 1 to 7, characterized in that the Nozzles (5) at the ends of the arms (4) non-rotatable and exiting Create rays at an acute angle to the arms (4). 10. Apparatus according to claim 8 or 9, characterized in that each nozzle with an inner split Boh tion is provided and generates two jets of liquid arranged next to one another at a distance, 11. Method for hydrodynamic cleaning of the interior of a boiler using a device according to one or more of the preceding claims, in particular for cleaning the inside of a cylindrical ': 809888/0337 - 23 - chemical reaction vessel which has a curved upper and lower end, characterized in that: a) inserting the device in the upper part of the reaction vessel so that the arms are in relation to a plane perpendicular to the longitudinal axis of the girder (2) is created or advanced, b) when the device is standing as a whole, the arms (4) rotates so that they conform to the curvature of the upper one Follow the tip while at the same time ejecting liquid under high pressure through the nozzles (5) and the carrier (2) rotates or swings, c) the device with continued ejection of liquid under high pressure from the nozzles (5) and rotating or swinging the carrier as a whole along the cylindrical part of the reaction vessel after the arms have fully followed the curvature of the upper summit and in this Stay in position, d) the movement of the device as a whole stops near the lower dome and the arms, 809886/0331 when the device as a whole rotates in order to follow the curvature of the lower dome, see above that the arms reach a position which is advanced to the plane perpendicular to the longitudinal axis while continuing to eject liquid under high pressure through the nozzles (5) and the carrier turns or swings, e) pulling the device out of the reaction vessel after cleaning is completed. 12. The method according to claim l1, characterized in that that the arms (4) held v / ground in a plane which is essentially perpendicular to the longitudinal axis of the carrier (5), - during the device as a whole along the cylindrical Moved part of the reaction vessel. 13. The method according to claim 11 or 12, characterized in that that - the arms during the introduction of the device into the reaction vessel essentially to the longitudinal axis are parallel. 14. The method according to one or more of claims 11 to, 13, characterized in that the arms according to the Consequences of the curvature of the lower dome are essentially parallel to the longitudinal axis. 609886/0337 Empty soap