EP1256761A2 - Process and apparatus for cleaning incineration boilers during operation - Google Patents

Abstract

The cleaning device is useful for the vertical empty runs, which become fouled up in use. The water input is via a vertical suspended heat-resistant hose (22). This hose is led into the upper end of the empty run via an input tube (15). There is at least one jet (24) on the bottom end of the hose to distribute the water.

Description

The invention relates to a method and a device for cleaning the boiler of incineration plants, in particular waste incineration plants.

State of the art

Despite all political efforts, there is still waste that cannot be recycled is economically still hygienically justifiable. The incineration of this residual waste suitable waste incineration plants will certainly be more environmentally friendly in the future than the landfill. Over the years, the industry has plants provided the maximum in compliance with the legal requirements offer environmental protection and use of energy. The combustion has due many years of experience with all other treatment methods most advanced state of the art.

The combustion initially produces not only the usual combustion gases aggressive gases, metal vapors and dusts caused by combustion and are largely removed by exhaust gas purification devices. A part these substances occupy the heating surfaces of the incineration plants, thus hindering them the use of heat and can lead to relocation of the flue gas path. The Vapors from alkali salts and metals act through cooling and condensation in the rubbers as glue. It has proven technically successful the flue gas temperature from the adiabatic combustion temperature, which at 1200 to 1400 ° C, to about 450 to 650 ° C via heat radiation in the combustion chamber and cool in empty trains (Figure 1). The incinerators are often equipped with three empty trains to divert the flue gases and break the thermals out of the furnace. Another advantage of this redirection can certainly also be seen in the reduction in the overall height of the system. In the empty trains are usually not convective heating surfaces - i.e. across to Flue gas flow pipes - installed. To enlarge the heating surfaces If necessary, bulkheads are arranged in the direction of the flue gas.

Because of the large free dimensions, empty trains can also be replaced by strong ones Deposits no relocation of the flue gas path occur. Are empty trains Boiler rooms which, in contrast to convective boiler areas, such as superheaters, Evaporators and economizers, not with a large number of heat exchanger tubes are equipped. For optimal use of heat - at flue gas temperatures The heat transfer by radiation is between 200 and 400 ° C comparatively low - are convective to reduce the temperature after the empty trains Heating surfaces (superheaters, evaporators and economizers) arranged. There are to improve the convective heat transfer, the pipes transverse to the flue gas direction arranged. Depending on the need and the flue gas temperature level, the convective area of steam heated in superheater above saturated steam temperature and the feed water in the economiser to approximately the boiling point of the associated pressure in the boiler drum heated. The balance sheet above this The flue gas heat that is required is used in the convective evaporator to evaporate used by boiler water. The flue gas generally comes along Temperatures between 180 and 280 ° C from the economiser and is in the Flue gas cleaning cleaned.

The boiler systems are shut down for cleaning when the flue gas temperature after the economiser is higher than the downstream flue gas cleaning it allows or rises above 650 ° C before the superheater. In this The flue gases for the temperature range are arranged in the convective part Superheater heating surfaces are particularly aggressive and the toppings are pasty. The travel time - in most cases the time from a cleaning-related shutdown to next - is crucial for the availability of the boiler system. Although the maximum flue gas temperature of 650 ° C before the superheater often increases leads to increased corrosive wear on the superheaters Boiler system can be operated with this high flue gas temperature to achieve sufficient availability.

Due to the condensation of alkali and metal vapors as described above due to sintering effects at high temperatures, the coatings adhere particularly well the empty trains and very strongly on the heating surfaces. To clean the heating surfaces, became different with the development of waste incineration plants Cleaning systems developed and used with more or less much success.

When knocking off, the heating surfaces that can be reached from the outside are marked by strong ones Shocks shaken with a pneumatically or hydraulically driven knocker. Attempts have also been made to beat the shock pulse over water-cooled Place pipes on heating surfaces that were not accessible from the outside. The cleaning of the heating surfaces of the empty trains during operation was not very successful. You could due to shutdown of the facility the temperature stresses that occur in the pads slightly improved become. The knocking pulse generally cannot be increased because both the knockers and the heating surfaces are damaged.

In the case of steam blowers, the heating surfaces are operated with high-pressure steam Lances cleaned. The steam emerges at the steam sound velocity - which is several times above the speed of sound of normal air - from the Nozzles of the lance and cleans the heating surfaces. During the impulse of the resulting Free jet is almost unchanged according to the kinetic laws remains, the speed of the free jet increases by sucking in Ambient flue gas very quickly, so that the success of cleaning in the vicinity of the jet is very good, but it is desirable at a greater distance from the lance leaves. Due to the high speeds, water drops and Dust particles in the vicinity of the lance have an abrasive effect on the heating surfaces. The endangered heating surfaces are therefore often equipped with special protective shells protected against abrasion.

In recent years, cleaning techniques have been developed in which the heating surfaces and the deposits adhering to it by the impulse of a metered Explosive charges are cleaned. For this, a water-cooled explosive charge brought into the corresponding boiler area and electrically ignited there. The cleaning results are good. Those associated with explosives handling Approval-related requirements and requirements make the process very complex.

A cleaning process with water lance blowers has been found in large boiler systems very well proven for power generation and has also been successful in waste incineration plants used. For this purpose, the Boiler systems installed movable water nozzles, which are automated Drive clean the opposite heating surfaces and also parts of the side walls.

The water jet becomes line-shaped over the heating surface to be cleaned performed and thus occurs only in one place. In large power plants, through the large dimensions of the radiation lines and the large ones to be cleaned Surfaces with few water lance blowers achieved great cleaning success become. The cleaning itself is carried out by both those associated with the cooling Thermal stress as well as the fact that the water jet through the Pressure gets under the pads and this is lifted by overpressure.

The disadvantage of this method is that the device is only on outer walls be installed and thus only the associated opposite Can clean walls or parts of the side walls. When using bulkhead heating surfaces the method is not suitable for cleaning all walls. The ever The heating surface to be cleaned is limited by the angle, with which the water hits. Therefore, especially empty trains with wide dimensions advantageously cleaned. The empty trains of waste incineration plants but are generally slim. This applies particularly to installation of bulkhead heating surfaces. With empty train heights of 10 meters, the distances can of the adjacent bulkheads and the spacing of the bulkheads the boiler outer walls are less than one meter.

An assembly of the water lance blowers on the boiler ceiling is basically possible, However, because of the boiler drum installed there, the one on the boiler drum connected boiling water pipes and steam pipes as well as the high Ambient temperatures for cleaning waste incineration plants so far practically not carried out.

When using water lance blowers there is also the risk that this will be punctiform applied water at comparatively low flue gas and wall temperatures not evaporated on the heating surfaces and carried away with the coverings becomes. This can block the downstream dust conveyor system come.

DE3106421A1 describes a method and a device for cleaning the flame tube of a boiler provided with at least one flame tube is known. During the operation of the boiler, it is emitted by a flue gas flows in a predetermined direction. To clean the wall are at least two separate blast medium jets are provided. The blow jet impact areas on the wall of the flame tube describe staggered against each other helical paths. For this it is necessary that the blowing device is rotated during the cleaning process.

The DD112512C describes a fixed blow head for sootblowers. The Blow head has a mushroom-shaped guide, the diameter of the blow pipe surmounted. At the top of the blow head are immediately behind the mushroom-shaped Guide four slot nozzles introduced into the blow tube on a cutting plane. The Slot nozzles are chamfered on both sides and to the rear by large chamfers.

DE289072C describes a blowpipe for cleaning the opposite one Heating pipes of double boilers with a common smoke chamber. The blowpipe has a nozzle at its front end, which has a circular outlet having. To change the gap width of the nozzle, there are two conical parts, that limit the gap, adjustable relative to each other.

Description and advantages of the invention

The object of the invention is to develop a method and a device, which makes it possible to date with the devices and methods according to the prior art the heating surfaces of empty trains from Incineration plants, in particular waste incineration plants in operation Operation to get rid of deposits and thus the heat utilization of the flue gases in the associated temperature range of the boiler.

This object is achieved according to the invention by a method with the features of claim 1 or by a device with the feature of claim 7 solved. Advantageous further developments and refinements of the method or the device are the subject of the respective dependent claims.

The method according to the invention for cleaning heating surfaces of incineration plants, especially of waste-fired incinerators, with vertical ones This distinguishes empty trains that become dirty during operation out, the water drops at speeds below an abrasive Effect, preferably less than 50m / s, for simultaneous all-round all around Cleaning of dirt (deposits) on a level to be cleaned Areas of the empty trains are used. The cleaning level is during cleaning moved vertically, cleaning during operation the incinerator, i.e. online. The amount of cleaning water is chosen so small that there is essentially no cleaning water gets into a funnel of the incinerator.

According to an advantageous development of the method, it is proposed that that the water supply via a vertically hanging heat-resistant flexible hose takes place, at least at the lower end of the hose a nozzle for distributing the water is provided.

Surprisingly, it was found that a flexible hose in the Deflected round nozzle even in previously inaccessible areas of the boiler can be used for online cleaning. For this, the flexible Hose inserted into the boiler through a suitable feed pipe at the point, under which the surfaces to be cleaned are arranged. The invention developed redirection round nozzle brings down through the heavy, vertical directed nozzle lance the water evenly on all surfaces (ceiling and sides) of the boiler area to be cleaned. Even at comparatively deep ones Saturated steam and flue gas temperatures do not pose a risk to the water with the hard deposits in the dust conveyor system that have been replaced by temperature shock arrives.

According to an advantageous development of the method, it is proposed that the cleaning water in the level to be cleaned all side walls of the cleaning Area of the train wetted at the same time.

It has proven to be advantageous that the cleaning water covers the ceiling of the area of the empty train to be cleaned is simultaneously wetted in a ring.

To further improve the cleaning effect without it Damage to the components of the incinerator comes after proposed yet another advantageous embodiment of the method, that the drop size is chosen so that less than 5% of the water in front evaporates from hitting the wall. This proposal also makes one Achieved minimization of the consumption of cleaning water.

The speed is selected so that the heating surface is damaged by Abrasion is essentially avoided.

The device for cleaning heating surfaces of an incinerator, in particular a waste incineration plant, with vertical empty trains, which during of the operation is characterized by the fact that the water supply via a heat-resistant hose hanging vertically from above. The hose is inserted through a feed pipe at the top of the empty train, the lower end of the hose having at least one nozzle for distribution of the water is provided.

The nozzle is preferably designed such that the reaction forces of the emerging Water cancel each other out.

Due to the exit angle α directed obliquely upward in the hose direction the deflecting nozzle can also heating surfaces, for. B. boiler blankets, cleaned that are above the nozzle lance.

The nozzle lance is provided with spacers above the deflection nozzle, which prevent the round nozzle from being damaged by wear in the feed pipe becomes.

It has proven to be advantageous that the cleaning process is the same Repeatedly repeated heating surface with a comparatively small amount of water is to bring the covering back to approximately smoke gas temperature by sufficient heating time to bring and thus a special in the subsequent cleaning to cause effective temperature shock. With an installed hose length measurement, the quantity measurement and pressure measurement of the water and the associated Control unit can be used for automatic operation a cleaning process is repeated several times according to experience becomes. The control unit provides the appropriate one for the height of the round nozzle Amount of water and thus corrects the increasing with the hose length static water pressure in front of the round nozzle.

It has also been shown that by the deflecting nozzle during operation with little Large water droplets formed before the pressure Hardly hit the heating surfaces due to their small specific surface evaporate.

The toppings released by the temperature shock are unexpectedly small and can therefore be easily removed with the installed dust conveyor system become.

The water pressure in front of the round nozzle only has to be selected so high that that formed from the exit angle α of the deflecting nozzle and the free fall Throwing parabola reaches the heating surface to be cleaned.

In the invention of the method, conditioning was initially carried out with trisodium phosphate Water was used because it was expected that the flue gas from waste incineration plants Hydrochloric acid carried along severe corrosion damage would cause the unalloyed heating surfaces. It has surprisingly turned out to be emphasized that the alkalization is not necessary because of the cleaning Steam generated on the wall prevents the entry of hydrochloric acid from the flue gas.

In addition to the simple design, the method according to the invention has several Benefits:

All heating surfaces of the empty trains can be used regardless of the external access situation be cleaned.

In order to achieve a particularly effective temperature shock in the rubbers, the incinerator must be advantageous for cleaning at maximum load be driven. The availability of services is thus through cleaning not adversely affected.

The travel time of the boiler system is no longer due to the pollution of the Heating surfaces of the empty trains determined.

The impulse of the water jet can be set so low that even refractory delivery in the first empty train cleaned without damage can be. The toppings are in the upper and middle area of the first move generally so soft that, according to previous experience, the water drops penetrate to the heating surfaces or the refractory delivery and through there evaporate the Leidenfrost phenomenon without cooling the surfaces and blow away the adhering deposits very effectively.

The device can be fully automated and remains with the exception of the Feed pipe fully transportable. Through an installed pressure measurement and quantity measurement Malfunctions are immediately recognized by comparison with the target values.

By cleaning the empty trains, the flue gas temperatures before the Superheaters are kept so low that the necessary superheating temperature the live steam is just reached. With this criterion are minimal Corrosion optimal service life of the heating surfaces of the superheaters achieved.

Due to the specifically small amount of water applied to the heating surfaces ensures that the water evaporates and not with the dust in the dust delivery system arrives.

Since the content of condensable alkali and metal vapors corresponds to the - through the described cleaning of the empty trains - lowered smoke gas temperatures are the deposits on the superheater, evaporator and economizer easier to remove with conventional tapping.

It goes without saying that the better cooling of the flue gases before convective area under otherwise identical circumstances to lower exhaust gas temperatures leads and thus increases the efficiency of the incineration plant.

Further advantages and details of the invention will become apparent from the drawing illustrated preferred embodiment explained without the subject the invention is limited to this embodiment.

Abbildung 1

Darstellung eines typischen Abfallverbrennungskessels mit einem Zuführrohr nach dem Stand der Technik,

Abbildung 2

Symbolische Darstellung der Haspel mit allen Armaturen und Führungsrohr

Abbildung 3

Symbolische Darstellung der Düsenlanze mit Umlenkrunddüse,

Abbildung 4a

Darstellung der Flugbahn der Wassertropfen bei einem Austrittswinkel α1 von 30 ° und einem Wasserüberdruck von 1,0 bar sowie 3 m Breite des Leerzuges,

Abbildung 4b

Darstellung der Flugbahn der Wassertropfen bei einem Austrittswinkel α2 von 45 ° und einem Wasserüberdruck von 1,0 bar sowie 3 m Breite des Leerzuges, und

Abbildung 5

Darstellung der Flugbahn der Wassertropfen bei einem Austrittswinkel α3 von 30 ° und einem Wasserüberdruck von 1,0 bar sowie 6 m Breite des Leerzuges

Show it:

illustration 1

Representation of a typical waste incineration boiler with a feed pipe according to the prior art,

Figure 2

Symbolic representation of the reel with all fittings and guide tube

Figure 3

Symbolic representation of the nozzle lance with deflecting round nozzle,

Figure 4a

Representation of the trajectory of the water drops at an exit angle α1 of 30 ° and a water pressure of 1.0 bar and 3 m width of the empty train,

Figure 4b

Representation of the trajectory of the water drops at an exit angle α2 of 45 ° and a water pressure of 1.0 bar and 3 m width of the empty train, and

Figure 5

Representation of the trajectory of the water drops at an exit angle α3 of 30 ° and a water pressure of 1.0 bar and 6 m width of the empty train

Figure 1 shows a waste incineration plant with a combustion chamber 1 and three empty trains 2, 3, 4, the third empty train 4 being equipped with bulkheads 5.1, 5.2 is. Over the empty trains 2, 3, 4 are the boiler drum 6.1, the boiling water pipes 6.2 and steam pipes 6.3 arranged. In the flue gas direction after the empty trains 2, 3, 4 are the superheaters 7.1-7.5, the evaporator 8.1-8.2 in the convective area and the Economiser 9.1-9.4 installed.

The waste is placed on the grate 12 via the feed shaft 10 and the distributors 11 led and burns in the combustion chamber 1. The flue gases cool in the exemplary boiler shown in the empty trains 2, 3, 4 and the superheater 7.1-7.5, Evaporator 8.1-8.2 and economizer 9.1-9.4 on the exhaust gas temperature of 180 to 220 ° C. When cleaning the empty trains 3, 4, the detached coverings fall into the hopper 13 and are discharged from there via the dust conveyor system 14.

Above the empty trains 2, 3, 4 are centered on the heating surfaces to be cleaned Empty trains 2, 3, 4 installed the 25 feed pipes 15 for the cleaning device, of which only one feed pipe 15 is shown in Figure 1.

Figure 2 shows the cleaning device schematically. The Reel 16 is via a quantity measurement 17, a control valve 18 and a pressure measurement 19 connected to a pressurized water connection 20. The reel 16 is driven by a torque-monitored, speed-controllable drive 21. The flexible heat-resistant hose 22 is rolled up on the reel 16 and connected. The reel 16 is connected to the pressurized water connection 20.

On the flexible heat-resistant hose 22, the nozzle lance 23 with the Deflection nozzle 24 connected. The deflecting round nozzle 24 can have a threaded rod 25 adjusted and secured with the lock nut 26. The proper one Position of the hose 22 is via an end position monitoring device 27 monitors. The hose length measurement 28 switches on automatic operation the direction of movement of the reel 16 in the end positions and gives the control unit 29 information about the position of the deflecting nozzle 24. The control unit 29 optionally provides the amount of water with this information or the water pressure upstream of the reel 16 to the appropriate setpoint. To the Protection of the deflection nozzle 24 against wear in the feed pipe 15 are above Deflection nozzle 24 spacer 33 attached.

The feed pipe 15 is provided with the feed pipe closure 30, which when closed Cleaning is closed. During the cleaning process, the Air purge valve 31 supplied air purge.

For cleaning, the reel 16 and accessories are placed above the inlet of the feed pipe 15 brought into position and to the pressurized water connection 20 and the feed pipe closure 30 and the sealing air valve 31 connected. After entering the Cycles, the cleaning height and the target water volume or water pressure in the control unit 29 starts the program. The air purge valve 31 and Feed tube closure 30 open automatically and the hose 22 drives the specified cleaning height from the specified number of cycles. After that the hose 22 is retracted and first the feed tube closure 30 and then the sealing air valve 31 closed.

The system shown is after a travel time of 3 weeks with 10 cycles each cleaned.

Figure 3 shows the nozzle lance 23 with a centrally arranged threaded rod 25. The deflecting round nozzle 24 can be set on the threaded rod 25 and secured with the lock nut 26 so that the gap thickness s between the deflecting round nozzle 24 and the nozzle lance 23 exits the desired amount of water at the appropriate speed , The angle α of the nozzle lance 23 and the deflecting round nozzle 24 determines the exit angle of the free jet. Spacers 33 are attached to the nozzle lance, which prevent the deflecting round nozzle 24 from being damaged when passing through the feed pipe 15. title Fig.4a Fig.4b Fig. 5 Exit angle α α1, α2, α3 30 ° 45 ° 30 ° height H1, H2, 3 10 m 10 m 10 m width b1, b2, b3 3 m 3 m 6 m Height of the round nozzle cleaning Drop trajectory -0.2 m boiler roof 35.4 34.1 34.6 34.11 -0.7 m boiler roof 35.4 34.2 34.7 34.12 -2.0 m Boiler side wall 35.1-35.2 34.3 34.8 34.13 -5.0 m Boiler side wall 35.1-35.2 34.4 34.9 34.14 -9.0 m Boiler side wall 35.1-35.2 34.5 34.10 34.15

Figures 4a and 4b show trajectories 34.1-34.5 and 34.6-34.10 Drops in a section of the empty trains with the boiler side walls 35.1 and 35.2 and the boiler ceiling 35.3 with a width of bl = b2 = 3 m with different Elevation of the round nozzle 24 with alternative exit angles compared to the horizontal of α1 = 30 ° (Fig. 4a) and α2 = 45 ° (Fig. 4b) at the Cleaning the boiler ceiling 35.3 and the boiler side walls 35.1 and 35.2.

Figure 5 shows the trajectories of drops 34.11-34.15 in a room with a width b3 = 6 m at different heights of the round nozzle 24 with an exit angle α3 with respect to the horizontal of 30 ° at the Cleaning the boiler ceiling 35.3 and the boiler side walls 35.1 and 35.2.

The nozzle diameter d was chosen to be 27 mm in the examples in FIGS. 4a and b and 5, and the gap thickness s was set to 0.7 mm. The water output is 3.0 m ³ / h, the cleaning height is -0.2 to -10 m from the boiler ceiling. The overpressure in front of the round nozzle 24 is 1.0 bar. The total length of the simultaneously wetted heating surface is 12 m in Figure 4a and 4b and 24 m in Figure 5, so that the specific water output was only 0.25 m ³ / hm and 0.125 m ³ / hm.

At a hose speed of 0.0667 m / s, the height becomes 10 m Drive through for 150 seconds.

LIST OF REFERENCE NUMBERS

1

firebox

2

first empty train

3

second empty train

4

third empty train

5

Scots

6.1

boiler drum

6.2

Siedewasserrohre

6.3

steam pipes

7

superheater

8th

Evaporator

9

economizer

10

feed chute

11

arbiter

12

rust

13

funnel

14

Dust conveying system

15

feed

16

reel

17

quantity measurement

18

control valve

19

pressure measurement

20

Pressure water connection

21

Torque-monitored, speed-adjustable drive

22

flexible heat-resistant hose

23

nozzle lance

24

Nozzle, round nozzle

25

threaded rod

26

locknut

27

Endlagenüberwachungsvorrichtung

28

Hose length measurement

29

control unit

30

Zuführrohrverschluß

31

Sealing air valve

32

Flue gas cleaning

33

spacer

34.1-34.5

Trajectories example Fig. 4a

34.6-34.10

Trajectories example Fig. 4b

34.11-34.15

Trajectories example Fig. 5

35.1-35.2

Boiler side walls

35.3

boiler roof

Angle α

Water outlet angle compared to the horizontal

α1

Angle in example Fig.4a

α2

Angle in example Fig.4b

α3

Angle in example Fig. 5

b1

Width of the empty train in Fig. 4a

b2

Width of the empty train in Fig. 4b

b3

Width of the empty train in Fig. 5

H1

Height of the empty train in Fig.4a

H2

Height of the empty train in Fig. 4b

H3

Height of the empty train in Fig. 5

d

Lance diameter

D

Umlenkrunddüsendurchmesser

s

Die gap thickness

Claims (23)

Process characterized in that water drops at speeds below an abrasion effect, preferably less than 50 m / s, are used for simultaneous all-round cleaning of the dirt on one level of the areas of the empty trains (2, 3, 4) to be cleaned, this cleaning level is shifted vertically during the cleaning, the cleaning is carried out during the operation of the incinerator and the amount of cleaning water is chosen so small that essentially cleaning water gets into a funnel (13). Method according to claim 1,
characterized in that the cleaning water in the plane to be cleaned wets all side walls of the area of the empty train to be cleaned simultaneously. The method of claim 1 or 2,
characterized in that the cleaning water simultaneously wets the ceiling of the area of the empty train to be cleaned in a ring. Method according to one of the preceding claims,
characterized in that the drop size is chosen so that less than 5% of the water evaporates before hitting a wall. Method according to one of claims 1 to 4,
characterized by
in which the water is supplied via a hose hanging vertically downwards, at least one nozzle being provided at the lower end of the hose. Method according to one of the preceding claims,
characterized in that the hose speed is greater than 0.03 m / s and less than 0.2 m / s. Device for cleaning the heating surfaces of an incineration plant, in particular a waste-fired incineration plant with vertical empty trains (2, 3, 4) which become dirty during operation,
characterized in that the water is supplied via a heat-resistant flexible hose (22) which hangs vertically from above, this hose (22) is introduced via a supply pipe (15) at the upper end of the empty train and that at least one is connected to the lower end of the hose (22) Nozzle (24) is connected to distribute the water. Device according to claim 7,
characterized in that the nozzle (24) is designed so that the reaction forces of the emerging water cancel each other out. Device according to claim 7,
characterized in that it is designed to be transportable. Device according to claim 7, 8 or 9,
characterized in that it can be operated automatically. Device according to one of claims 7 to 10,
characterized in that the nozzle (24) is designed as a deflecting round nozzle (24) and this is held vertically below the feed pipe 15 by the symmetrical design of the water outlet. Device according to one of claims 7 to 11,
characterized in that the deflecting round nozzle (24) can also clean boiler areas which are located above the deflecting round nozzle (24) by the configuration of the nozzle shape and thus the exit angle α of the water. Device according to one of claims 7 to 12,
characterized in that the deflection round nozzle (24) has an exit angle α of the water at least greater than 10 ° with respect to the horizontal. Device according to one of claims 7 to 13,
characterized in that the deflection round nozzle (24) has an exit angle α of the water at least less than 60 ° with respect to the horizontal. Device according to one of claims 7 to 14,
characterized in that the nozzle lance (23) is made from a preferably particularly heavy, thick-walled tube, in order to avoid vertical deformation even when the flexible hose (22) is deformed and thus allows the water jet to strike the surfaces to be cleaned at the same height. Device according to one of claims 7 to 15,
characterized in that the nozzle lance (23) has spacers (33) on the outside above the deflecting round nozzle (24), so that damage to the deflecting round nozzle (24) by the guide tube (15) is avoided. Device according to one of claims 7 to 16,
characterized in that a reel (16) with an end position monitoring device (27) is provided. Device according to claim 17,
characterized in that the reel is provided with a quantity measurement (17) and pressure measurement (19) which monitors the proper functioning of the cleaning by comparing the two measured variables with setpoints. Device according to claim 17 or 18,
characterized in that the reel (16) is provided with a hose length measurement (28) which controls the change of movement during automatic cleaning and reports the pressure of the static water column in front of the nozzle to a control unit (29). Apparatus according to claim 17, 18 or 19,
characterized in that it has a control (29) which permits and monitors the automated operation of the reel (16) with a hose length measurement (28). Device according to one of claims 17 to 20,
characterized in that the reel (16) is provided with a device which automatically monitors the correct movement of the flexible heat-resistant hose (22) via torque detection of a drive (21) and end position monitoring device (27). Device according to one of claims 7 to 21,
characterized in that it is designed such that sealing air prevents the escape of smoke gases at the feed pipe (15) when the cleaning device is in operation. Device according to claim 22,
characterized in that the feed pipe (15) prevents the escape of flue gases by a feed pipe closure (30) when the cleaning device is at a standstill.

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