EP2699847A2

EP2699847A2 - Cleaning device for a thermal power plant, method for installing a cleaning device and method for cleaning a thermal power plant

Info

Publication number: EP2699847A2
Application number: EP12715916.8A
Authority: EP
Inventors: Nina HEIßEN; Christian Mueller; Manfred Frach
Original assignee: Clyde Bergemann GmbH Maschinen und Apparatebau
Current assignee: Clyde Bergemann GmbH Maschinen und Apparatebau
Priority date: 2011-04-21
Filing date: 2012-04-13
Publication date: 2014-02-26
Also published as: WO2012143291A3; US20140150825A1; DE102011018441A1; CN103635748A; WO2012143291A2

Abstract

The invention relates to a cleaning device (1) for an interior (2) of a thermal power plant (3) carrying flue gases, especially a so-called soot blower. Said cleaning device (1) comprises at least one rigid lance (4) having a base (5) and a lance add-on part (6) which comprises at least one nozzle (7), the lance add-on part (6) being detachably connected to the base (5). According to the invention, at least the lance add-on part (6) comprises at least one sensor (10) for measuring an environmental parameter. The invention further relates to a method for installing such a cleaning device (1) and to a cleaning and monitoring method for defined areas of the interior (2) of the thermal power plant (3).

Description

Cleaning device for a thermal power plant, method for setting up a cleaning device and method for cleaning a thermal power plant

The present invention relates to a cleaning device for a flue-gas leading interior of a thermal power plant. In addition, a method for setting up a cleaning device and a method for cleaning a thermal power plant with such a cleaning device are specified.

In thermal power plants, by combustion of fuels, wastes and the like, a flue gas is produced which, due to its temperature, is capable of recovering the thermal energy contained therein by subsequent contact with heat exchangers and / or heat transfer by radiation. It is clear that in addition to ash, soot, dusts, etc., where appropriate, aggressive gases, metal vapors and the like may occur during combustion. These constituents contained in the flue gas are deposited during operation, in particular on the walls or internals in the interior of the thermal power plant, through which the flue gas is passed. It was observed that due to the increasing addition of such substances, the heat exchange between the flue gas and the heat exchanger medium is increasingly lower and thus the efficiency and efficiency of the thermal power plant decreases. For this reason, it is also known to purify the individual surfaces in the interior of the thermal power plant according to demand or to remove the impurities, slag etc. adhering there. This can be done during a downtime of the thermal power plant, preferably, however, such a cleaning should be carried out during operation of the thermal power plant. It must be taken into account that the cleaning takes place so that the normal operation of the thermal power plant is as little as possible affected. The standing with the flue gas permanently in contact walls and / or heating surfaces of the thermal power plant, in particular the heat exchange surfaces must therefore be cleaned occasionally to ensure adequate cooling of the flue gas. Depending on the type and location of the contamination, different cleaning systems can be used. It is preferred in this case to carry out the cleaning during operation of the thermal power plant, that is to say while fuel or waste is being combusted in the combustion chamber or combustion chamber. Thus, the availability of the thermal power plant can be maintained over a particularly long period of time (the so-called "travel time").

For cleaning such heat exchange surfaces, various cleaning systems are known. Thus, for example, what are known as water lance blowers are used, which comprise a pivotable water lance positioned on the thermal system, which can deliver a water jet selectively and with high energy through a hatch and through, for example, the firebox to opposite and / or laterally arranged wall regions. Such water lance blowers are to be used in particular where relatively large surfaces have to be cleaned and these are easily accessible due to the pivoting range of water lances.

Another concept is the so-called sootblowers. These include an elongated tube with nozzles arranged circumferentially around the end of the tube. This pipe is now temporarily inserted into inner areas of the thermal power plant, during which it can perform a rotational movement. During the translational movement of the tube, the nozzles circumferentially distribute water vapor (and / or air) or water at relatively low pressure. Such a sootblower can be used advantageously where narrow elongated shafts or closely arranged tube bundle heat exchangers are provided inside the thermal power plant, while at the same time there is sufficient outlet for the outgoing lance tube outside the thermal power plant. Furthermore, it is also known to penetrate by means of a cleaning system from above into the thermal power plant, for example. Into the Leerzüge, wherein a high temperature resistant hose is lowered with a water distribution device at the end. Thus, the water distribution device may simultaneously and / or on all sides deliver water in the circumferential direction to adjacent walls to a distance of 3 m to 4 m during the lowering or pulling up.

In all the cleaning systems mentioned above, the question of the triggering time for such cleaning during operation of the thermal power plant arises. In the past, priority was given to fixed time intervals, these intervals being based on empirical values. It was then proceeded to provide viewing windows or other optical aids in the combustion chamber and / or downstream areas of the thermal power plant, in order to obtain a subjective impression of the soiling state of the combustion chamber or the heat exchange surfaces and possibly start the cleaning. In addition, for example, the flue gas temperature was observed when leaving the thermal power plant, wherein when reaching legally prescribed limit value temperatures, a cleaning was made.

Furthermore, it is to be regarded as known that the thermal power plant is equipped with temperature sensors or heat flow sensors in order to determine the temperature in the interior of the thermal power plant and / or the temperature of the heat exchange medium. Furthermore, it is known to provide sensors for determining the weight of heat exchange surfaces, so that it can be concluded on the basis of the weight on the residues adhering thereto. These temperatures or weights were also used for the needs-based and targeted cleaning of particularly soiled interior areas of the thermal power plant.

Although the above systems are already being used with great success, there is still a desire to do even better To monitor the processes in the interior of the thermal power plant to achieve, so that the operation of the thermal power plant is even less disturbed by cleaning processes. This is to be achieved in particular by obtaining more accurate information on the actual state in the interior area or on the heat exchange surfaces, particularly where it is possible to clean with the aid of the available cleaning appliances. In particular, a possibility should also be created for retrofitting already existing thermal power plants with as little technical effort as possible with such monitoring systems or measuring systems.

Finally, the goal has been set to monitor the functionality or the actual mode of action of the cleaning device or to adapt to the external environmental conditions in cleaning devices, for example. Deep dive into the interior of the thermal power plant. This should also be able to monitor current cleaning parameters.

On this basis, it is an object of the present invention to at least partially solve the technical problems described with reference to the prior art. In particular, a cleaning device for a flue-gas leading interior of a thermal power plant is to be specified, which is adaptable to different positions or to predetermined situations for use as needed. In particular, the cleaning device should also open the possibility to provide information about the operating state of the cleaning device and / or the environment of the cleaning device in the interior of the thermal power plant. In addition, a method is to be specified with which such a cleaning device can be set up or retrofitted for use in the interior of a thermal power plant. In addition, it is also an object of the present invention to provide a method for cleaning a thermal power plant, wherein with a correspondingly prepared cleaning device better control of the slagging tion or the cleaning effect during operation of the cleaning device or the thermal power plant is possible.

These objects are achieved with a cleaning device according to the features of patent claim 1, a method for cleaning a cleaning device according to the features of claim 9 and a method for cleaning a thermal power plant according to the features of claim 10. Further advantageous embodiments are in each dependent formulated claims specified. It should be noted that the features listed individually in the claims in any technologically meaningful way, can be combined with each other and show other embodiments of the invention. The description, in particular in conjunction with the figures, explains the invention and provides further preferred embodiments of the invention.

The cleaning device according to the invention for a flue-gas-carrying interior region of a thermal power plant has at least one rigid lance with a fuselage and at least one lance attachment, wherein the lance attachment comprises at least one nozzle, and wherein the lance attachment is detachably connected to the fuselage.

This cleaning device is in particular a so-called sootblower. Sootblowers are known in various design variants, for example as wall blowers, lance screw blowers, pendulum blowers, axial blowers, screw blowers, rotary blowers, crossbeam blowers or two-component blowers. Wandbläser regularly have two opposite high-performance nozzles that clean during the cleaning process circular rearward areas on the wall of the thermal power plant. The wall blowers are used in particular for stubborn dirt on the wall heating surfaces and at high flue gas temperatures. Lanzschraubbläser be used in particular for effective cleaning of stubborn dirt on Rohrbündelheizflächen at high flue gas temperatures. These are regular also provided at least two opposite high-performance nozzles, which emit a helical cleaning beam during an axial and simultaneously rotating movement. With pendulum blowers, stubborn soiling of specially specified segments on tube bundle heating surfaces is cleaned at high flue gas temperatures. For this purpose, the pendulum blower during the cleaning process is commuted and extended in the boiler, the cleaning medium discharged through the nozzles then concentrated cleans these segments. In the case of axial blowers, only one axial direction of travel of the lance is realized so that two opposing high-performance nozzles regularly clean pipe bundle heating surfaces with heavy contamination only along cell-shaped regions parallel to the lance. In contrast, in rotary blowers at least at times a rotational movement of the lance is realized, so that here too a helical blow jet is generated, which eliminates stubborn dirt, especially on Rohrbündelheizflächen. The rotary tube blower actually performs only one rotary movement during cleaning and is held axially in a predetermined position. Such rotary-tube blowers are particularly suitable for cleaning soiled tube bundle heating surfaces. Truss blowers usually have a variety of high-performance nozzles, which are aligned to one side (or more sides) of the lances. When Trersenbläser the lance is therefore moved axially into the interior, the aligned high-performance nozzles in the manner of a rake in particular finned tube heat exchanger with light soiling and low flue gas temperatures. Finally, there are also known two-component blowers in which a selective use of different cleaning media (air, steam, water) is made possible. In this case, the cleaning media can be added in particular with correspondingly adapted pressure to the surfaces to be cleaned. In the case of two-component blowers, it is preferred that they can on the one hand supply a liquid cleaning medium and, on the other hand, a vaporous / gaseous cleaning medium (offset in time) to predetermined cleaning surfaces. In such cleaning devices, the rigid lance is now formed with a hull and at least one nozzle head, nozzle cover, nozzle arm, nozzle boom or the like (all Lanzanbauteile). The rigid lance is constructed in particular in the manner of a pipe, wherein further concentric pipe sections can be provided in the interior of the pipe, for example, to at least partially separate from each other cleaning media, cooling media, etc. Also, inside the rigid lance, an outflow region for cleaning agent towards the nozzle head or nozzle arm or lance attachment and additionally a return flow region can be realized, so that the cleaning medium, which does not exit through the nozzle, is returned again for cooling the rigid lance. Such a rigid lance has a length of several meters, for example. At least 5 m, or even 10 m, or even 15 m. It may be appropriate to limit the length to 20 m in order to avoid undesired deflection during operation. In this case, the lance attachment of the rigid lance regularly represents an (axial and / or lateral) end region of the rigid lance, which is introduced far into the inner regions of the thermal power plant or which lies opposite the connection for the cleaning fluid. It is considered advantageous that the lance attachment comprises at least one nozzle. Of course, it is also possible that further nozzles in the remaining area of the rigid lance, in particular the hull, are executed. It is further preferred that the lance attachment in particular has at least two opposing high-performance nozzles, which are suitable in particular for delivering a high-energy liquid vaporous and / or gaseous cleaning jet. In this respect, the lance attachment can be embodied, in particular, as a pipe tip or pipe arm closed on one side, corresponding nozzles being used in bores of the lance attachment, which provide a connection from the inside to the outside.

Here it is now proposed that the rigid lance is formed with two parts, namely at least one lance attachment and a hull, wherein the lance attachment and the hull are releasably connected to each other. In other words, that means in particular that the hull is after Type of a tube open on both sides and / or is designed with at least one lateral outlet opening for the cleaning medium and a one-sided closure of the end portion of the fuselage and / or the outlet opening is achieved by means of the lance attachment. For this purpose, the lance attachment can be clamped to the hull, screwed or fastened in a corresponding manner, so that the connection can be released again after a single attachment of the lance attachment to the hull. Thus, in particular, it is achieved that the lance attachment for the hull is replaceable, so in particular for different purposes different lance attachments can be arranged on the same hull. This allows, for example, a simple maintenance or a technically simple replacement of the nozzles on the lance attachment, for example. In the event that a nozzle is damaged or clogged. Furthermore, it is thus easy to react to changed conditions in the interior region of the thermal power plant, so that a different mode of operation or a different jet direction of the cleaning medium can be set with an exchanged lance attachment. Of course, in this detachable connection between the lance attachment and the fuselage, care must be taken to ensure that a suitably suitable seal is provided which ensures the thermal and other requirements for the use of the cleaning device in a flue-gas inside area of a thermal power plant.

According to a development of the cleaning device, it is also proposed that the lance has a longitudinal drive for moving the lance in the direction of an axis of the lance. In particular, the cleaning device has a holder and a longitudinal drive with which the lance of the holder can be moved in the axial direction. In general, this longitudinal drive allows a substantially horizontal movement of the lance, where appropriate, to compensate for a deflection of the long lance in the interior of the thermal power plant and small angles of incidence for the lance can be realized. For this longitudinal drive in particular electric motors, carriage, dental Rods or the like for use. In that regard, reference is made here to the known longitudinal drives for the realization of sootblowers.

The cleaning device may additionally also have a rotary drive. This can be coupled to the longitudinal drive, so that a predetermined longitudinal movement (forced) has an adapted rotation of the lance about its axis result. In this way, technically simple and robust drives for such a cleaning device can be realized. It is also possible that the longitudinal movement of the lance is decoupled from the rotation movement of the lance, so that the longitudinal movement and the rotational movement can be carried out independently of one another, for example by providing separate motors or drives for the different movements. The decoupling of both movements has the advantage that a more targeted cleaning of the dirty or slagged surfaces is possible.

According to a particularly preferred embodiment of the cleaning device according to the invention, at least the lance attachment has at least one sensor for measuring an environmental parameter. In principle, it is possible that the lance attachment also has a plurality of sensors. The sensors may be in contact with the material of the lance attachment, the outside environment, and / or the interior environment. In particular, it is possible to measure an environmental parameter of the material of the lance attachment, the external environment and / or the interior environment of the lance attachment. It is preferred that the sensor is connected to the lance attachment so that this remains during disassembly of the hull on the lance attachment. It is very particularly preferred that the lance attachment form a sensor system which can be operated independently of the configuration of the fuselage or together with standard interfaces provided on a fuselage. The provision of such a combined sensor nozzle Lanzenanbauteils allows in particular the retrofitting of conventional sootblowers with an efficient evaluation unit or monitoring unit, as then forms the lance attachment. Equal- It should be noted here that the functions can also be present separately: Accordingly, the exchangeable or detachable lance component has at least one element from the group of nozzle and sensor. The term "sensor" is here to be regarded as a generic term for apparatuses with which the desired environmental parameters can be detected and / or which allow an analysis or monitoring of processes inside the thermal power plant , Spectrometer, temperature gauge, gas probe, pressure gauge, etc.

In this context, it is considered particularly advantageous that at least one sensor for measuring the outside temperature or at least one sensor for measuring an internal temperature of the lance is provided. It is very particularly preferred that in each case a single sensor for measuring the outside temperature (in the interior of the thermal power plant) and a single sensor for measuring an internal temperature (in the lance or in the lance attachment) are provided. Consequently, the sensor for measuring the outside temperature is disposed in contact with the outside environment of the lance attachment, while the sensor for measuring the inside temperature of the lance is directed inward. The sensor for measuring an outside temperature is consequently, in particular during the operation of the cleaning device in contact with the flue gas in the interior of a thermal power plant. The sensor for measuring an internal temperature of the lance is preferably in contact with the cleaning medium (water, steam, air, etc.) during operation, so that in particular the temperature of the cleaning medium can be determined. The exposed position of the lance attachment during the operation of such a cleaning device in the interior of a thermal power plant has relatively high thermal loads result or allows the collection of temperature data that are otherwise difficult to detect metrologically. This relates firstly to the temperature of the flue gases at a distance of, for example, over 10 m from the wall of the thermal power plant, as well as the temperature of the cleaning medium actually just before leaving through the nozzle. This information can be used to analyze, review and possibly adjust the cleaning process. In addition, it is considered advantageous that the at least one sensor can be connected to an evaluation unit, and the lance attachment has connection means for data transmission from the at least one sensor to the evaluation unit. The evaluation unit serves, in particular, to convert the measurement signals of the sensor into meaningful parameters, to compare the parameters with one another, etc. The evaluation unit therefore also includes, for example, a computing unit or the like. It is to be avoided that such an evaluation unit is exposed to the high thermal loads experienced by the lance attachment during immersion in the inner region, so that the evaluation unit is advantageously arranged permanently outside the thermal power plant. For this purpose, a corresponding area may be provided on the cleaning device, but it is also possible that the evaluation unit is positioned independently of the cleaning device at another location of the thermal power plant. Due to this distance between see sensor and evaluation is a simple, robust and reliable data transmission to realize. For this purpose, the lance attachment (eg standardized) connecting means, which realize a data transmission from the sensor to the evaluation unit. For a data transmission by means of cables, the connection means may have corresponding signal conductors, connectors, sliding contacts, etc. It should be noted, however, that appropriate (electrical) connecting means are realized according to the method of operation of the lance (axial and / or rotating movement). The connecting means are also preferably set up so that they can be separated or contacted without problems when releasing / detaching the lance attachment component from the fuselage or when reconnecting lance attachment and fuselage.

To further simplify the assembly or disassembly is therefore proposed that the connecting means at least one data transmitter for a wireless connection to the evaluation include. In other words, this means, in particular, that the hull has no connection means for data transmission, but only the lanel attachment has at least one data transmitter with which the measured values of the at least one sensor can be transmitted wirelessly to the evaluation unit. For this purpose, the data transmitter can transmit the measured values, for example, via radio to the evaluation unit. Preference is given here radio frequencies, z. B. also on the type of Bluetooth ^® or RFID. This embodiment of the lance attachment with a sensor that realizes a wireless connection, further favors the retrofitting of conventional cleaning equipment with a corresponding sensor nozzle Lanzenanbauteil.

For such a wireless data connection is in particular a technique into consideration, generated in the mechanical waves on the surface of a mostly monocrystalline piezoelectric substrate material and used for data transmission to a suitably equipped receiver. This can also be done coded to allow a clear assignment of the respective sensors.

Very particularly preferred is the use of at least one such cleaning device described in a thermal power plant with a flue gas-carrying interior region, wherein a wall of the inner region has at least one hatch into which the lance can be inserted at least with the lance attachment in the interior. Furthermore, a longitudinal drive for moving the lance in the direction of an axis through the hatch is provided, which is arranged on a side opposite the inner side of the wall. In other words, this means that such a cleaning device is mounted outside on the wall or on such a heat power plant, so that the temporary immersion of the lance can be realized at least with the lance attachment through the hatch. A hatch for such a lance is regularly provided in the thermal power plant, which may also be closed. It is also possible that a sealing air connection or a Purge gas connection is provided, which is positioned to the hatch, that before and / or during the immersion of the lance into the interior no flue gases can escape. In such a thermal power plant is very particularly preferred that the lance attachment is designed with at least one sensor and a data transmitter for a wireless connection to an out-of-the-inner evaluation unit, and the evaluation unit is connected to the longitudinal drive. For this purpose, the evaluation unit may, for example, be equipped with a corresponding data receiver, so that the data from the interior of the thermal power plant can be emitted to the evaluation unit during operation to the outside. On the basis of the received data of the sensors of the lance attachment, the evaluation unit can now influence the operation of the cleaning device, in particular the method of movement of the lance, by implementing a corresponding data connection or control line towards the longitudinal drive. In principle, it is also possible for information of the longitudinal drive to be forwarded to the evaluation unit, so that, for example, specific measuring procedures for predetermined positions of the lance attachment in the interior can be initiated or terminated, depending on the travel path.

According to a further aspect of the invention, a method for setting up a cleaning device for a flue-gas-carrying inner region of a thermal power plant is specified, wherein the cleaning device has at least one rigid lance, and the method comprises at least the following steps:

a) separating the rigid lance of the cleaning device into a lance attachment with at least one nozzle and a hull,

b) positioning at least one sensor on the lance attachment, c) providing remote data transmission from the sensor to an evaluation unit,

d) connecting the lance attachment with the hull. In particular, this process is a procedure by which conventional sootblowers are retrofitted with an independent sensor nozzle lance attachment. Even if this combined function is particularly preferred, this method can possibly also be used only with the integration of nozzles or sensors.

For this purpose, the originally one-piece rigid lance can first be separated in a step a), so that a hull is formed and at least one lance attachment, comprising the end portion and / or a side arm of the rigid lance (with at least one nozzle). This separated lance attachment can now be prepared for the sensors. For this purpose, at least one sensor is positioned on the lance attachment (step b)). According to the desired environmental parameters to be measured with the sensor on the lance attachment, a corresponding arrangement of the sensor is to be made. In order to transmit the measured values generated by the sensor during operation of the cleaning device in a technically particularly simple manner, connecting means for wireless remote data transmission are to be provided or positioned at the lance attachment and, if applicable, elsewhere. Just when step c) is completed for the lance attachment, the lance attachment thus prepared with the at least one sensor and, for example, at least one data transmitter can be reconnected to the rest of the fuselage, according to step d) a detachable connection between the lance attachment and fuselage is preferred.

With regard to the implementation or expression of the individual method steps for setting up the cleaning device, reference is made in particular to the above explanations regarding the embodiments of the cleaning device according to the invention. This relates, in particular, to the measures already described for positioning the sensor, for embossing the sensor, for attaching or executing connecting means for a remote data transmission or for a data transmitter, as well as the detachable connection between the lance attachment and the fuselage. A further aspect of the invention also proposes a method for cleaning a thermal power plant with a flue-gas-carrying inner area by means of at least one cleaning appliance which has a rigid lance with at least one sensor on a lance attachment of the lance, which comprises at least the following steps :

i) inserting the lance attachment in the lance in an interior of the thermal power plant,

ii) measuring an environmental parameter,

iii) transmitting the measurement signals to an evaluation unit,

iv) selecting an operating mode of the at least one cleaning device,

v) cleaning certain areas of the interior in accordance with the selected operating mode.

The method described here for cleaning the thermal power plant is realized in particular with a cleaning device of the type described above, in particular according to the invention. In that regard, reference is made to the explanations there for the closer characterization of the cleaning device and its functions or modes of operation.

In other words, this method for cleaning a thermal power plant is also used here for monitoring the current processes in the thermal power plant or in the lance. Thus, for example, after predetermined time intervals and / or as a result of corresponding cleaning routines which are possibly based on other sensory measured values, such a cleaning step or such a monitoring process can be initiated. For this purpose, according to step i), at least the lance attachment of the lance is first introduced into the interior of the thermal power plant. Thus, the lance attachment also reaches far away from the wall of the thermal power plant sectors in the interior of the thermal power plant. Now, if such a position or such a sector is reached, a measuring process can be initiated here. For this purpose, a sensor on the lance attachment of the lance an environmental parameters determined, which is in particular an environmental parameter from the group outside temperature in the interior of the thermal power plant and internal temperature of the lance. Possibly. it is possible that the environmental parameters are measured several times, so that in some circumstances step ii) can be performed several times. It is also preferable that steps i) and ii) are carried out at least partially simultaneously.

The measured environmental parameters can be transmitted directly and / or bundled to the evaluation unit. This is preferably wireless. In other words, this means that step iii) takes place when the lance attachment of the lance is arranged in the inner region of the thermal power plant, wherein at the same time the evaluation unit is positioned outside the interior of the thermal power plant. The transmission of the measuring signals is therefore preferably carried out by means of a radio technology. The measurement signals received by the lance attachment of the lance can now serve as the basis for the selection of a predetermined operating mode of the at least one cleaning device. For example, it can be decided with which pressure or volume flow the cleaning medium is to be dispensed, at which points cleaning medium is to be dispensed, which state of aggregation the cleaning medium is to have, over which period of time cleaning medium is to be dispensed, which temporal offset between the treatment of The control of the cleaning device or the evaluation unit usually has corresponding cleaning routines or selection criteria, so that a predetermined operating mode, which is stored, for example, is automatically selected taking into account the received measurement signals can. The corresponding information for realizing the desired blowing jet and / or the desired method of movement of the cleaning device are then transmitted, for example, to the drive of the cleaning device and / or the corresponding apparatus for providing the cleaning medium. This now makes it possible, according to step v), for the predetermined regions of the interior be cleaned according to the selected operating mode. Even if it is fundamentally possible that steps ii) and v) can be carried out in parallel at least temporarily, a separate mode of operation of the cleaning device with a measuring procedure and a cleaning procedure is preferred. This can also be specified, for example, by the method of movement of the cleaning device or the sootblower.

The invention and the technical environment will be explained in more detail with reference to FIGS. It should be noted that the objects illustrated in the figures are schematic and not intended to limit the invention. The figures also show very particularly preferred embodiments of the invention. 1 shows an overview of a thermal power plant,

2 shows a detail of a cleaning device,

3 shows a cleaning device in a first operating situation,

4 shows the cleaning device from FIG. 3 in a second operating phase, and FIG

Fig. 5: an overview of another thermal power plant.

Fig. 1 shows a thermal power plant 3 with a combustion boiler 25 (or firebox), in which a fuel or waste is burned. Flue gas then flows along the inner region 2 of the thermal power plant 3 and comes into contact with the walls of the thermal power plant or heat exchanger 20 arranged therein. The flue gas, as indicated here by arrows, flows starting from the combustion boiler 25, for example. B. over Leerzüge 26 in a convection part 27 before it leaves the heat plant 3. Especially in the latter part a plurality of heat exchangers is arranged, in particular tube bundle heat exchanger according to Art of packets through which a cooling fluid (eg water) flows. By the contact of the hot flue gas with the heat exchangers 20, the thermal energy is transferred from the flue gas to the cooling fluid and can be removed for further use. Especially these heat exchanger surfaces 20 and the walls of the thermal power plant 3, which limit the interior, therefore pollute or slag during operation.

The thermal power plant 3 illustrated here has various systems for cleaning these areas. In the area of the combustion vessel 25, a pivotable water lance 23 (in the manner of a water lance blower) is arranged, the nozzle is fixedly positioned in a hatch, wherein by means of a high-energy water jet opposite and adjacent wall areas can be cleaned by a corresponding meandering guidance of the blowing jet. In the area of the empty draw 26, a hanging hose system 24 is provided at the top, which can be lowered through a ceiling area. At the end of the hose, a nozzle is provided which can clean the lateral wall areas at the level of the nozzle. In the convection part 27, a plurality of cleaning devices 1 are provided in the manner of sootblowers, which can dive deep into the narrow gaps between the individual tube bundles of the heat exchangers 20. It is provided that all cleaning devices 1 and possibly also the pivotable water lances 23 or hanging hose systems 24 are connected to a common fluid line 17, wherein possibly the different fluids are provided in separate line systems.

2 shows a rigid lance 4 of a cleaning device according to the invention, the rigid lance being designed here with a hull 5 and a lance attachment 6, which are shown separated from one another. The lance attachment in the manner of a nozzle head can be detachably connected to the hull. The fuselage 5 can also be designed with the fluid line 17 at one end, with the fluid line 17 optionally also extending into inner regions of the fuselage 5. The hull 5 is according to Art a tube with an axis 9 formed. The lance attachment 6 forms a dome-shaped end region of the lance 4, which has two opposite high-performance nozzles 7. For measuring the outside temperature, a first sensor 10 is shown on the left and for measuring the internal temperature in the lance 4, a second sensor opposite the fluid line 17 near the nozzles 7 in the interior of the lance attachment 6 is provided. Both sensors 10 are connected via signal conductor 28 with connecting means 12 and a data transmitter 13. Via this connection means 12 or the data transmitter 13, the measurement signals detected by means of the sensors 10 can be transmitted to a remote, not shown, evaluation unit.

Fig. 3 shows an embodiment of a cleaning device 1 in the manner of a sootblower. The sootblower 1 is positioned on a wall 14 of the thermal power plant. The wall 14 has a hatch 15, through which the lance attachment 6 or the fuselage 5 of the cleaning device 1 can penetrate into the interior region 2 of the heat installation 3. In this inner area 2 are shown here table schematically indicated heat exchanger 20, which can be cleaned by means of this cleaning device 1. The cleaning device 1 also has a holder 21, on the example. A longitudinal drive 8, a rotary drive 22, a fluid line 17, possibly also a port 18 (valves, etc.) for the fluid line 17 and a controller 16 for the operation of the cleaning device 1 is positioned. Part of the controller 16 is here also an evaluation unit 11, which is designed with a data receiver 19.

It is now illustrated here that the lance of the cleaning device 1 is retracted into the flue-gas-filled interior region 2 of the thermal power plant 3. A corresponding arrow below the longitudinal drive 8, which is responsible for this axial movement, illustrates this. During this insertion of the lance attachment 6 of the lance into the inner region 2 of the thermal power plant 3, an environmental parameter is measured, in particular the outside temperature in the interior region 2 of the thermal power plant. The lance attachment 6 of the cleaning device 1 is also designed with a data transmitter 13, with which a wireless transmission of the measuring signals to the evaluation unit 11 arranged outside is made possible. For this purpose, it may be expedient to realize no direct transmission of the measurement signals from the data transmitter 13 of the lance attachment 6 to the data receiver 19 of the evaluation unit 11, but to execute this communication via a distributor 32. This can realize a reliable detection of the measuring signals in the inner area 2 and a forwarding of these measuring signals for the outdoor area, in particular due to the possibly difficult conditions for the radio transmission. On the basis of the received measurement signals, which may be processed by means of the evaluation unit 11, the controller 16 can be provided with a decision aid for the actual cleaning steps to be performed or the operating mode of the cleaning device 1. Although the wireless data transmission is explained in detail here, the transmission and transmission of measured values can basically also be carried out by cable, for example by means of a cable. B. by means of a slip ring, so that this reading is also ensured during the movement of the cleaning device.

As illustrated in FIG. 4, the controller 16 now controls the actual cleaning operation of predetermined regions of the inner region 2. A cleaning is, for example, in the rearward direction of travel 29, in a rotation of the lance in the direction of rotation 30 and / or with a spraying device 31 , starting from the lance attachment 2 or the lance possible. For the sake of completeness, it should be pointed out that the predetermined regions of the inner region 2 can be selected specifically by implementing a corresponding direction of travel 29 and / or direction of rotation 30. In regular soot blowers a predetermined method of operation is always repeated, since appropriate mechanical Wegführsysteme are provided. In principle, however, it is also possible for independent drives to be realized for the direction of travel and / or the direction of rotation, so that the travel paths can be adjusted freely, in particular taking into account the measurement signals obtained. Fig. 5 illustrates the structure of a thermal power plant 3 in the power plant industry. In this case, the supplied fuel 33 is first burned and the flue gas then flows, starting from the combustion boiler 25 (or firebox), along the inner region of the thermal power plant 3 and comes into contact with the walls of the thermal power plant or therein heat exchangers 20. It flows the flue gas, starting from the combustion boiler 25 z. B. over various superheater 34 to a (here vertically arranged) convection part 27 before it reaches the so-called DeNOx part 35 for the removal of nitrogen oxides. Even with such a thermal power plant 3 a variety of cleaning devices are used: In the field of the boiler 25, for example, wall blowers and / or Wasserlanzenbläser; in the area of the superheater 34 pendulum blowers, axial blowers, Lanzenschraubbläser and / or Zweistoffbläser; in the region of the convection 27 Axialbläser, Schraubbläser and / or Trussenbläser and in the field of DeNOx part 35 Truss blower.

Although only heat power plants from the field of waste incineration and the power plant industry are shown here in the figures, the invention can basically be used in all other thermal power plants as well, especially in the paper industry, biomass, the petrochemical industry, etc. Thus, the invention realizes the goal in cleaning equipment, for example. Deep dive deep into the interior of the thermal power plant to monitor the functionality or the actual mode of action of the cleaning device or adapt to the external environmental conditions. In addition, it has also been possible to specify a cleaning device for a heat power plant, which can be adapted as needed to different positions or to predetermined situations for use. In particular, the possibility was opened to provide information about the operating state of the cleaning device and / or the environment of the cleaning device in the interior of the thermal power plant. There- In addition, a method was also specified with which such a cleaning device can be set up or retrofitted accordingly. Finally, the invention has also provided a method for cleaning a thermal power plant, with which a better control of the slagging and soiling tendency or the cleaning s effect during operation of the cleaning device or the thermal power plant is made possible.

List of Reference Numerals 1 Cleaning device

2 indoor area

3 thermal power plant

4 lance

5 hull

6 lance attachment

7 nozzle

8 longitudinal drive

9 axis

10 sensor

11 evaluation unit

12 connecting means

13 data transmitters

14 wall

15 hatch

16 control

17 fluid line

18 connection

19 data receivers

20 heat exchangers

21 bracket

22 rotary drive

23 swiveling water lance

24 hanging hose system

25 fuel boilers

26 empty train

27 convection part

28 signal conductors

29 direction of travel

30 direction of rotation Spray direction Distributor Fuel Superheater DeNOx part

Claims

Patent claims

Cleaning device (1) for a flue gas-carrying interior area (2) of a thermal power plant (3), comprising at least one rigid lance (4) with a body (5) and at least one lance attachment (6), which comprises at least one nozzle, the lance attachment being detachable connected to the fuselage.

Cleaning device (1) according to claim 1, wherein the lance (4) has a longitudinal drive (8) for moving the lance (4) in the direction of an axis (9) of the lance (4).

Cleaning device (1) according to one of the preceding claims, wherein at least the lance attachment (6) has at least one sensor (10) for measuring an environmental parameter.

Cleaning device (1) according to claim 3, wherein at least one sensor (10) is provided for measuring an outside temperature or at least one sensor (10) for measuring an inside temperature of the lance (4).

Cleaning device (1) according to claim 3 or 4, wherein the at least one sensor (10) can be connected to an evaluation unit, and the lance attachment (6) has connecting means (12) for data transmission from the at least one sensor (10) to the evaluation unit (11 ) having.

Cleaning device (1) according to claim 4, wherein the connecting means (12) comprise at least one data transmitter (13) for a wireless connection to the evaluation unit (11). Thermal power plant (3) with an interior area (2) carrying flue gas, having at least one cleaning device (1) according to one of the preceding patent claims, wherein a wall (14) of the interior area (2) has at least one hatch (15) into which the lance ( 4) can be inserted into the interior area at least with the lance attachment part (6), and a longitudinal drive for moving the lance in the direction of an axis through the hatch is provided, which is arranged on a side of the wall opposite the interior area.

Thermal power plant according to claim 7, wherein the lance attachment has at least one sensor (10) and a data transmitter (13) for a wireless connection to an area outside the interior

(2) arranged evaluation unit (11) is carried out and the evaluation unit (11) is connected to the longitudinal drive (8).

Method for setting up a cleaning device (1) for a flue gas-carrying interior area of a thermal power plant

(3), wherein the cleaning device (1) has at least one rigid lance (4), and the method comprises at least the following steps: a) separating the rigid lance

(4) of the cleaning device (1) into a lance attachment (6) with at least one nozzle (7) and a body

(5),

b) Positioning at least one sensor (10) on the lance attachment

(6),

c) providing remote data transmission from the sensor (10) to an evaluation unit (11),

d) Connecting the lance attachment (6) to the fuselage (5).

Method for cleaning a thermal power plant (3) with an interior area (2) carrying flue gas by means of at least one cleaning device (1) which has a rigid lance (4) with at least one sensor (10) on a lance attachment part (6) of the lance (4). , comprising at least the following steps: i) inserting the lance attachment part (6) into the lance (4) in an interior area of the thermal power plant (3),

ii) measuring an environmental parameter,

iii) transmitting the measurement signals to an evaluation unit (11), iv) selecting an operating mode of the at least one cleaning device (1),

v) Cleaning predetermined areas of the interior (2) according to the selected operating mode.