Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
  • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
  • F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
  • F23J3/023—Cleaning furnace tubes; Cleaning flues or chimneys cleaning the fireside of watertubes in boilers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
  • B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for 
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
  • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
  • F23J11/00—Devices for conducting smoke or fumes, e.g. flues 
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
  • F28G1/00—Non-rotary, e.g. reciprocated, appliances
  • F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
  • F28G15/00—Details
  • F28G15/003—Control arrangements
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49826—Assembling or joining

Definitions

• 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.
• a method for setting up a cleaning device and a method for cleaning a thermal power plant with such a cleaning device are specified.
• a flue gas 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.
• thermal power plant 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.
• the availability of the thermal power plant can be maintained over a particularly long period of time (the so-called "travel time").
• water lance blowers For cleaning such heat exchange surfaces, various cleaning systems are known.
• water lance blowers 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.
• sootblowers 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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 Rohrbündelsammlung vom at high flue gas temperatures.
• 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 Rohrbündelsammlung vom.
• 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.
• 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 Lanzanbaumaschine).
• 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.
• 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.
• a rigid lance has a length of several meters, for example.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• 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.
• the lance has a longitudinal drive for moving the lance in the direction of an axis of the lance.
• the cleaning device has a holder and a longitudinal drive with which the lance of the holder can be moved in the axial direction.
• 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.
• this longitudinal drive in particular electric motors, carriage, dental Rods or the like for use.
• 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.
• a predetermined longitudinal movement force
• 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.
• the lance attachment has at least one sensor for measuring an environmental parameter.
• 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.
• the sensor is connected to the lance attachment so that this remains during disassembly of the hull on the lance attachment.
• 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 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.
• 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.
• 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.
• the lance attachment eg standardized
• the connection means may have corresponding signal conductors, connectors, sliding contacts, etc.
• 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.
• the connecting means at least one data transmitter for a wireless connection to the evaluation include.
• 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.
• 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.
• 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.
• a hatch for such a lance is regularly provided in the thermal power plant, which may also be closed.
• 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.
• 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.
• 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.
• 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.
• information of the longitudinal drive 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.
• 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:
• 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.
• 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.
• at least one sensor is positioned on the lance attachment (step b)).
• a corresponding arrangement of the sensor is to be made.
• connecting means for wireless remote data transmission are to be provided or positioned at the lance attachment and, if applicable, elsewhere.
• step c) 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.
• 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 :
• 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.
• a cleaning device of the type described above in particular according to the invention.
• 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.
• a cleaning step or such a monitoring process can be initiated.
• at least the lance attachment of the lance is first introduced into the interior of the thermal power plant.
• 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.
• 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.
• 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.
• 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.
• step v) 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.
• FIGS. 1 shows an overview of a thermal power plant
• FIG. 4 shows the cleaning device from FIG. 3 in a second operating phase
• 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 Leerman 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.
• a cooling fluid eg water
• the thermal energy is transferred from the flue gas to the cooling fluid and can be removed for further use.
• the thermal power plant 3 illustrated here has various systems for cleaning these areas.
• a pivotable water lance 23 in the manner of a water lance blower
• 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.
• a hanging hose system 24 is provided at the top, which can be lowered through a ceiling area.
• a nozzle is provided which can clean the lateral wall areas at the level of the nozzle.
• 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.
• the 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.
• a first sensor 10 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.
• 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.
• the lance of the cleaning device 1 is retracted into the flue-gas-filled interior 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.
• 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.
• 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.
• 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.
• 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 Weggonesysteme are provided.
• Fig. 5 illustrates the structure of a thermal power plant 3 in the power plant industry.
• 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.
• the invention can basically be used in all other thermal power plants as well, especially in the paper industry, biomass, the petrochemical industry, etc.
• 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.
• a cleaning device for a heat power plant which can be adapted as needed to different positions or to predetermined situations for use.
• 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.
• 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.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Incineration Of Waste (AREA)
• Cleaning In General (AREA)

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• 2011
  • 2011-04-21 DE DE102011018441A patent/DE102011018441A1/de not_active Ceased
• 2012
  • 2012-04-13 CN CN201280019527.8A patent/CN103635748A/zh active Pending
  • 2012-04-13 WO PCT/EP2012/056747 patent/WO2012143291A2/de active Application Filing
  • 2012-04-13 EP EP12715916.8A patent/EP2699847A2/de not_active Withdrawn
  • 2012-04-13 US US14/112,148 patent/US20140150825A1/en not_active Abandoned

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