WO2012163620A1

WO2012163620A1 - Boiler cleaning

Info

Publication number: WO2012163620A1
Application number: PCT/EP2012/058110
Authority: WO
Inventors: Georg BRÜNDERMANN
Original assignee: Rosink Apparate- Und Anlagenbau Gmbh
Priority date: 2011-05-27
Filing date: 2012-05-03
Publication date: 2012-12-06
Also published as: DE102011076585A1

Abstract

The invention relates to a device for cleaning a substantially horizontal flue gas pass (1) of an incinerator (2), comprising a nozzle head (7) which can be laterally introduced into the flue gas pass (1) and which conducts a cleaning medium towards the inner walls of the flue gas pass (1) and/or towards heat-transmitting tubes arranged in the flue gas pass, comprising a feed line that is connected to the nozzle head (7) for supplying the nozzle head (7) with the cleaning medium, and comprising a drive for moving the nozzle head (7) within the flue gas pass (1). The aim of the invention is to design such a device such that the device is easy to handle and requires only a relatively small amount of space outside of the incinerator. This is achieved in that the feed line to the nozzle head (7) is designed as a flexible refractory tube (8). A tube reel (9) is arranged outside of the incinerator, the tube (8) being windable on said reel and unwindable from said reel. A traction means that runs to the other end of the flue gas pass (1) is fixed to the nozzle head (7) on the face facing away from the tube reel (9), and traction can be applied to the traction means.

Description

boiler cleaning

The invention relates to a device for cleaning a substantially horizontal or inclined relative to the horizontal flue gas duct of a combustion system with a nozzle head which is laterally inserted into the flue and a cleaning medium against the inner walls of the flue ^¬ train and / or directed against therein heat transfer tubes, a with the nozzle head connected to the supply line for acting on the nozzle head with the Reinigungsme ^¬ medium and a drive for moving the nozzle head within the flue.

So-called sootblowers are used to clean horizontal or slightly inclined flues of incinerators, in particular large-scale boilers. A known Rußbläser of the type mentioned (DE 10 2008 036 686 B4) consists of a displaceable in the axial direction blowpipe, which has at its working end a nozzle head with lateral outlet nozzles. Is used for cleaning the flue gas trains a gaseous and / or liquid cleaning ^¬ medium such as steam and / or water. The blowpipe is retracted laterally into the boiler by means of a drive system located outside the boiler, whereby steam and / or water jets directed to the surfaces to be cleaned, and then pulled out of this again.

Flue gas pipes are often 16 meters long and in some cases even County ^¬ ger so very long blowpipes must be used. The handling of the very long blowpipes is very problematic for various ^¬ nen reasons. On the one hand, gene boiler side on which the blowpipe is ^¬ leads in the boiler, considerable space required, because it not only the drive mechanism for the blowpipe must be accommodated, but the space required also depends on the length of the blowpipe. On the other hand, the handling of a very long blowpipe is difficult, because this must be made relatively stable in order to minimize the degree of sagging provided with the nozzle end of the pipe.

The invention is therefore based on the object, a device for cleaning of substantially horizontal

To create flue gas trains, which is easy to handle and outside the incinerator requires only a relatively small amount of space.

According to the invention, this object is achieved in that the supply line to the nozzle head is designed as a flexible, refractory hose that outside the Burn ^¬ tion plant is arranged with a servo motor driven in both directions hose drum on which the hose can be wound and unwound from this that on the nozzle head on the side facing away from the hose drum a traction means extending to the other end of the flue gas train is fastened and that the traction means can be ^loaded with tension.

The construction according to the invention has the advantage that on the boiler side, on which the nozzle head in the

Flue gas is introduced, a relatively small Platzbe ^¬ may be required, which is essentially influenced by the dimensions of the hose reel. In addition, the supply line formed as a hose to the nozzle head compared to a rigid, very long blowpipe represents a much lower technical device complexity. The traction means, which is usually constantly in the flue, can be designed as a relatively inexpensive Ver ^¬ wear part, for example in shape one Chain of interlocking steel links or a steel rope.

The application of the tensile force to the traction means can be done with very simple mechanical means.

Preferably, the traction means is guided on the opposite side of the hose drum of the incinerator via a provided with a horizontal axis of rotation pulley, wherein at the downwardly guided end of the Zugmit ^{¬ means} a weight is arranged. This construction is in ^{¬ so} far very simple, as only a drive for the hose reel is required. The tension exerted on the traction means is achieved exclusively by the weight arranged at the end of the traction means.

Alternatively, it is also possible to provide a motor for applying the traction on the traction means on which the hose reel against ^¬ opposite outer side of the combustion plant, preferably a motor with Drehmo ^¬ torque control, the winding the traction means on a separate drum.

The traction means is suitably hindurchge ^¬ by wall boxes, which are arranged on the outer sides of the walls of the incinerator.

The drive of the hose drum is preferably carried out by means of a servomotor, so that the movement of the nozzle head is easily controlled.

The hose drum is suitably rotatable about a horizontal axis, thereby facilitating the winding and unwinding of the hose onto the drum.

Preferably, a construction of the drum is selected, in which the flexible, refractory hose with the aid of two guide rollers in the middle of the hose reel can be unwound or aufspulbar. This construction will always ensures a linear guidance of the hose.

The flexible, refractory hose can be made torsionally rigid ^¬ . In connection with such a hose, the hose drum can be pivotable about an axis extending centrally to the flue gas duct to be cleaned, so that different areas within the flue can be cleaned successively by appropriate rotation of the hose reel and thus the hose and the nozzle head. A swivel angle of the hose drum from the central position by 90 ° in both directions is sufficient to direct the nozzles of the nozzle head to all areas of the flue gas to be cleaned.

To unimpeded tilting of the nozzle head to be granted afford ^¬, a hinge may be provided between the nozzle head and-bound with this comparable traction means.

The feeding of the cleaning medium to the hose reel is expediently effected by means of a connecting line, which is connected to the hollow-shaped and connected to the hose end axis of rotation of the hose reel. The invention is illustrated by way of example ^¬ in the drawing and described hereinafter in detail with reference to the drawing. Show it:

1 is a schematic representation of a section through a flue of an incinerator with the cleaning device according to the invention,

Fig. 2 is a plan view of the incinerator

according to FIG. 1,

Fig. 3 shows the same area of the incinerator

1 and 2 seen in perspective from the other side and

Fig. 4 in an enlarged view of the hose drum with their drives.

In the drawing, an embodiment of the invented ^¬ contemporary apparatus for cleaning a substantially horizontal Rauchgaszugs 1 an incinerator 2 is ones shown, provides.

The incinerator 2 essentially consists of a very large vessel, is shown ^¬ cut from that in the drawing only the front boiler wall 3 and the rear wall of the boiler 4 in the corner. Such boilers, through which run the flues to be cleaned, have extremely large dimensions. In the embodiment shown in the drawing, for example, the running through the boiler ^¬ running flue gas 1 have a length of 16 meters or more. The flue 1, which is to be cleaned in the ^{dargestell ¬} th embodiment of the incinerator 2 in the drawing, runs horizontally between an upper tube package 5 and a lower tube package 6. Die Rohrpakete 5 und

6 consist of heat transfer tubes, such as Rip- penrohren, can be passed through the water to be heated.

The cleaning device according to the invention consists We ^¬ sentlichen from a nozzle head 7, which is laterally insertable into the flue gas 1 and a cleaning medium, beispiels- as water vapor or water, passes against the tube packages 5 and 6. FIG.

The nozzle head 7 is a flexible, refractory

Hose 8 is connected, for the application of the nozzle head

7 serves with the cleaning medium. As can be seen from FIGS. 1 and 2 of the drawing, a hose reel 9 is attached on the left side of the incinerator 2 at a distance in front of the front boiler wall 3. orders, on which the hose 8 can be wound up and unwound from this.

The hose reel 9 is driven by means of a in Fig. 4 Darge ^¬ presented servo motor 10 either in one or the other direction to either the hose 8 on the hose reel 9 or unwind from this.

On the nozzle head 7 is on the hose drum 9 abge ^¬ facing side to the other end of the flue 1 ver ^¬ running traction means, in the present case a chain 11, attached. The chain 11 runs through the entire length of the flue 1 and is guided on both outer sides of the boiler ^¬ walls 3 and 4 by wall boxes 12 and 13, which surround the chain 11 sealingly.

In the embodiment shown in the drawing, the tensile force on the chain 11 is achieved by means of a weight 14. For this purpose, the chain 11 runs over a deflection roller 16 provided with a horizontal axis of rotation 15, the weight 14 being fastened to the downwardly hanging end of the chain 11. Alternatively, it is of course also possible to replace the weight 14 by a torque-controlled motor which winds the chain 11 on a drum.

When the hose reel 9 according to FIG. 1 is rotated counterclockwise with the aid of the servo motor 10 shown in FIG. 4, the hose 8 is wound from the hose

Hose Reel 9 and is by means of the tensile force that exerts the weight 14 on the chain 11, to the right in the

Pulled in flue 1. The nozzle head 7 can easily pass through the entire length of the flue 1, where it cleans the tube packages 5 and 6 by means of the emerging from its nozzles cleaning medium.

A perfect guidance of the hose 8 behind the Hose drum 9 is achieved in that the hose 8 by means of two guide rollers (17, 17a) centrally from the hose reel 9 can be unwound or aufspulbar on this. This construction ensures that the

Hose behind the hose reel 9 is held exactly aligned with the flue 1.

In order to make the cleaning process optimal, a construction is provided in which the nozzle head 7 can be pivoted from its central position in both directions. This functional mechanism is achieved in that the flexible, refractory hose 8 is largely torsionally rigid. In addition, the Schlauchtrom ^¬ mel 9 is pivotable about a centrally to the flue gas to be cleaned flue 1 axis, namely from its central position in both directions by about 90 °.

In order not to hinder the pivoting movement of the nozzle head 7, a rotary joint 7a is provided between the nozzle head 7 and the chain 11, so that the chain 11 does not need to follow the pivoting movements of the nozzle head 7. The hose reel 9 is arranged in a housing 18. For swinging back and forth the hose reel 9 while the housing 18 is pivoted together with the hose reel 9 by means of a motor 19 alternately by about 90 ° in one direction and the other. As is apparent in particular from Fig. 2, the Zufüh ^¬ tion of the cleaning agent to the hose reel 9 by means of a connection line 20 which is connected to the hollow design and connected to the inner end of the tube axis 21 of rotation of the hose reel 9. The connecting line 20 is designed to be sufficiently flexible to join the pivoting ^¬ movement of the hose reel 9.

The cleaning device according to the invention can thus without further take the place of the previously used blow lances, which are cleaned according to the prior art horizontal flues. With the cleaning device according to the invention all movements of a lance can be traced.

Although the chain 11 remains constantly within the hot Kes ^¬ selinnenraums, but it can be replaced as a wear part comfortably and with little effort.

The advantages of the cleaning device according to the invention over the use of blow lances is not only the lower device complexity, but in particular the small footprint that the hose reel 9 with its drive mechanism laterally outside the boiler wall needed.

The cleaning device according to the invention is not only suitable for cleaning horizontal flue gas trains but also of such flue gas trains, which have a certain angle of inclination relative to the horizontal.

Boiler cleaning List of Reference Signs 1 flue

2 incinerator

3 front boiler wall

4 rear boiler wall

5 upper tube package

6 lower tube package

7 nozzle head

7a swivel

8 hose

9 hose drum

10 servomotor

11 chain

12 wall box

13 wall box

14 weight

15 axis of rotation

16 pulley

17 leadership role

17a leadership role

18 housing

19 engine

20 connecting cable

21 axis of rotation

Claims

claims

1. A device for cleaning a substantially horizontal or inclined relative to the horizontal flue gas flue (1) of a combustion plant (2)

-this nozzle head (7) into the flue (1) is insertable since ^¬ Lich and a cleaning media against the interior walls of the flue (1) and / or forwards against arranged therein heat transfer tubes,

one of the nozzle head (7) connected Zuführungslei ^¬ device for acting on the nozzle head (7) with the cleaning medium

as well as a drive for moving the nozzle head (7) inside the flue (1), d a c h e c e c e n e,

in that the supply line to the nozzle head (7) is designed as a flexible, refractory hose (8),

- That outside the incinerator a hose ^¬ drum (9) is arranged, on which the hose (8) can be wound and unwound from this,

in that on the nozzle head (7) on the side facing away from the hose reel (9) a to the other end of the

Rauchgaszugs (1) extending traction means is attached and - That the traction means can be acted upon by train.

2. A device according to claim 1, characterized in that the application of the tensile force to the traction means with a mechanical device takes place.

3. Apparatus according to claim 2, characterized in that the traction means on the

Hose drum (9) opposite the outside of the incinerator (2) via a provided with a horizontal axis of rotation (15) guide roller (16) and that at the downwardly guided end of the traction means a weight (14) is arranged.

4. Apparatus according to claim 2, since you rchgekennzeichnet that for applying the train to the traction means on the hose reel (9) gegenüberlie ^¬ ing outside of the incinerator (2), a motor is provided.

5. Device according to claim 4, characterized in that the engine has a torque control.

6. Device according to one of claims 1 to 5,

since you rchgekennzeichnet that the Zugmit tel is a chain (11) of interlocking Stahlglie ^¬ countries.

7. Device according to one of claims 1 to 5,

The tow hitch is a steel cord.

8. Device according to one of claims 1 to 7,

since you hchgekennzeichnet that the Zugmit tel through wall boxes (12, 13) passes, which are arranged on the outer sides of the walls (3, 4) of the incinerator (2).

9. The device according to claim 1, wherein the

Hose reel (9) by means of a servomotor (10) as ^¬ election in both directions can be driven.

10. Device according to one of claims 1 to 9,

It is not possible that the

Hose drum (9) about a horizontal axis (21) rotatably ^¬ bar is mounted.

11. Device according to one of claims 1 to 10,

Since you rchgekennzeichnet that the flexib ^¬ le, refractory tube 8 by means of two guide ^{rollers ¬} (17, 17a) centrally from the hose reel (9) from ^¬ spoolable or can be spooled on this.

12. Device according to one of claims 1 to 11,

since you rchgekennzeichnet that the flexible ^¬ le, refractory hose (8) is torsionally stiff.

13. Device according to claim 12, characterized in that the hose reel (9) is pivotable about an axis extending centrally to the flue gas duct (1) to be cleaned.

14. The apparatus of claim 13, since you rchgekennzeichnet that the pivot angle of the hose ^¬ drum (9) from the central position in both directions is about 90 °.

15. Device according to claim 13 or 14, in that a swivel joint (7a) is provided between the nozzle head 7 and the traction means.

16. Device according to one of claims 1 to 15,

Since you hchgekennzeichnet that the Zufüh ^¬ tion of the cleaning medium to the hose reel (9) by means of a connecting line (20), which is connected to the hollow trained and connected to the hose end axis of rotation (21) of the hose reel (9) is connected.