EP2788703A1 - Vorrichtung und verfahren zum reinigen von verbrennungseinrichtungen - Google Patents
Vorrichtung und verfahren zum reinigen von verbrennungseinrichtungenInfo
- Publication number
- EP2788703A1 EP2788703A1 EP12805914.4A EP12805914A EP2788703A1 EP 2788703 A1 EP2788703 A1 EP 2788703A1 EP 12805914 A EP12805914 A EP 12805914A EP 2788703 A1 EP2788703 A1 EP 2788703A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- interior
- wall
- shell
- container casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 238000004140 cleaning Methods 0.000 title claims description 42
- 238000002485 combustion reaction Methods 0.000 title description 3
- 239000002360 explosive Substances 0.000 claims abstract description 74
- 239000000203 mixture Substances 0.000 claims abstract description 67
- 239000002245 particle Substances 0.000 claims abstract description 31
- 238000005516 engineering process Methods 0.000 claims abstract description 13
- 238000005422 blasting Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 40
- 238000004880 explosion Methods 0.000 claims description 29
- 230000000694 effects Effects 0.000 claims description 10
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 230000011218 segmentation Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000006004 Quartz sand Substances 0.000 claims 1
- 229910052500 inorganic mineral Inorganic materials 0.000 claims 1
- 239000011707 mineral Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 49
- 239000007789 gas Substances 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000001681 protective effect Effects 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 235000019589 hardness Nutrition 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000011161 development Methods 0.000 description 3
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
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- 238000001704 evaporation Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
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- 239000002390 adhesive tape Substances 0.000 description 1
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- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
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- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
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- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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- 238000009736 wetting Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D25/00—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag
- F27D25/006—Devices or methods for removing incrustations, e.g. slag, metal deposits, dust; Devices or methods for preventing the adherence of slag using explosives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0007—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by explosions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
-
- 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
-
- 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
- F28G7/00—Cleaning by vibration or pressure waves
- F28G7/005—Cleaning by vibration or pressure waves by explosions or detonations; by pressure waves generated by combustion processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/087—Flexible or deformable blasting cartridges, e.g. bags or hoses for slurries
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
- F42B5/02—Cartridges, i.e. cases with charge and missile
- F42B5/24—Cartridges, i.e. cases with charge and missile for cleaning; for cooling; for lubricating ; for wear reducing
Definitions
- the invention is in the field of internal cleaning of containers and relates to a container shell, an apparatus and a method for removing deposits in the interior of containers according to the preamble of independent claims 1, 6, 9, 10 and 12. More particularly, the invention relates to a Device and a method for cleaning soiled and garbage containers with caking on the inner walls, in particular of incinerators, by means of blasting technology. Such a method is also called blast cleaning.
- Heating surfaces z. B. of waste incineration plants or coal boilers are generally subject to heavy pollution. These contaminants have inorganic compositions and typically result from deposition of ash particles on the wall. Coatings in the range of high flue gas temperatures are usually very hard because they either remain melted or fused stick to the wall or are glued together by their lower melting or condensing substances on the colder boiler wall. Such deposits are difficult and insufficient to remove by known cleaning process. As a result, the boiler must be periodically shut down, cooled and manually or sandblasted. Since such boilers usually have rather large dimensions, this often requires the construction of a scaffold in the furnace. This also requires a business interruption of several days or weeks and is also extremely unpleasant and unhealthy for the cleaning staff because of the strong dust and grime attack.
- a cleaning method in which the cooled and also the hot boiler in operation is cleaned by means of introduction and ignition of explosive devices.
- a cooled explosive device is brought into contact with the soiled by means of a cooled lance Heating surface brought where the explosive charge is ignited.
- the heating surface caking is blown off by the force of the detonation, as well as by the wall vibrations generated by the shock waves.
- the cleaning time can be significantly reduced with this method compared to the conventional cleaning methods.
- the cleaning can take place with the necessary safety precautions during the operation of the incinerator or even in the hot condition of the container. It is thus possible to clean a boiler in this way within hours and without interruption of operation, which takes days with a conventional cleaning method.
- EP 1 067 349 A disadvantage of the process described in EP 1 067 349 is the need for explosives. In addition to the high cost of the explosive material to avoid accidents, such as the storage of explosives, a large amount of security must be operated. The introduction of explosive material in a hot container also requires a completely reliable and efficient cooling system to prevent premature detonation of the explosive. From EP 1 362 213 Bl a further cleaning method is known, which also uses the means of explosion generation. Instead of explosive according to this method, however, an inflatable container with an explosive gas mixture container shell is attached to the end portion of a lance. The lance is now introduced together with the empty container shell in the boiler room and positioned near the point to be cleaned. Subsequently, the container shell is inflated with an explosive gas mixture.
- the starting components can be guided via separate feed lines into the interior of the container casing and the dangerous explosive gas mixture can only be produced in the interior of the container casing already placed in the boiler room shortly before the explosion is triggered.
- the container envelope accommodating the explosive gas mixture contains, for example, layers of paper and / or plastic.
- the associated method has the disadvantage that the cleaning effect is purely mechanical cleaning methods, such as sandblasting, is limited and based solely on the effect of explosion pressure waves.
- Object of the present invention is therefore to modify the container shell of the cleaning device and the associated method so that the cleaning effect is improved.
- the cleaning method disclosed here is based on explosive mixtures of gaseous, liquid and / or powdered or powdered components, which are introduced into the interior, ie the receiving space, a flexible container shell, together with the container shell in the vicinity of a point to be cleaned bring to then bring the mixture to destroy the container shell to explode.
- the explosive mixture preferably contains at least one gaseous component and is particularly preferably completely gaseous, in particular in an explosive state.
- the explosive mixture is preferably prepared exclusively from gaseous or rapidly evaporating components.
- the flexible container shell is inflated or inflated by the inflowing gas with expansion of the interior.
- the explosive mixture preferably contains a fuel and an oxidizing agent, such as. As gaseous oxygen or an oxygen-containing gas.
- the fuel may be liquid or gaseous. This can z. As acetylene, ethylene, methane, ethane, propane, gasoline, oil, etc. be.
- the explosive mixture can already be introduced as a mixture in the container shell.
- the components or at least individual components of the mixture in particular via separate supply lines, individually introduced into the interior of the container shell and there mixed together to the explosive (final) mixture. To trigger the explosion, the mixture is ignited.
- the force of the explosion and the area vibrated by the shock waves e.g. A container or pipe wall, cause the break-off of the Wandan- caking and slagging and thus cleaning the surface.
- the strength of the explosion required for cleaning, and thus the amount of components used in the mixture, depends on the type of soiling and the size and type of soiled container.
- the dosage and strength of the explosion can and are preferably chosen so that no damage to installations occurs.
- the possibility of optimal dosing of the substances used reduces on the one hand the cleaning costs, on the other hand the danger and damage risk for plant and persons.
- the flexible container shell thus forms a receptacle for the explosive mixture and allows the secure positioning of the mixture at the point to be cleaned. Furthermore, the container shell prevents dilution of the explosive mixture with the ambient air. Furthermore, the container can also serve to cool the explosive mixture in order to prevent the mixture from being ignited prematurely in the hot boiler room.
- the container shell is preferably formed thin-walled.
- the container shell is preferred, foldable, rollable or crumpled, so that they are not distended Condition may be present as a compact body.
- the wall of the container casing is formed in a multi-layered manner with intermediate, inflatable or inflatable hollow chambers, the container casing wall in the inflated state of the wall chambers no longer necessarily has a thin-walled character due to its greater wall thickness.
- the container casing is no longer necessarily thin-walled in the inflated condition of the wall combs.
- the wall of the container shell may be formed as a single layer.
- the wall is multilayered with at least two layers of the same or a different material.
- One of the materials should preferably be distinguished by its gas-tightness.
- layers of plastic are particularly well suited.
- Another material should be characterized by some heat resistance and thermal insulation, or by its ability to absorb a wetting coolant, such as water, or both.
- the container casing can consequently contain an inner (facing the interior) layer of plastic and an outer (outwardly facing) layer of or with pulp.
- the layer of plastic may be applied as a film on the outer layer, for. B. by sticking.
- the layer of plastic can also be applied to the outer layer by a coating process.
- the layer of plastic can also be applied as a plastic resin or paint.
- the container shell can be so soaked or sprayed, for example, prior to imports into a hot plant with coolant, preferably water. Due to the evaporation of the water, a cooling effect is achieved on the container casing, which prevents premature burning of the casing or premature ignition of the explosive mixture.
- the gas-tight, but possibly less heat-resistant layer is preferably arranged in the layer composite to the interior. It is especially preferred the innermost layer.
- the heat-resistant or coolable layer is preferably arranged in the layer composite to the outside. It is particularly preferably the outermost layer.
- the layers can be connected to each other over a large area or continuously or punctually or part of the area, for. B. by means of an adhesive bond.
- the container shell may also contain or consist of an elastically extensible layer material.
- the container casing wall can accordingly be designed such that it expands when the inner space is inflated and formed with the explosive mixture (eg elastically).
- the container shell can therefore also be designed in the form of an elastically expandable balloon.
- the container shell wall is not or only partially stretchable.
- the container case is merely unfolded or unrolled when driving and shaping the interior.
- the container shell preferably completely encloses the interior and preferably forms only an inlet opening for the explosive mixture.
- the container shell can, for. B. be a bag-like envelope or bag.
- the wall of the container casing is now preferably constructed at least in sections and preferably completely in such a way that it liberates particles in the explosion of a mixture located in the interior of the container casing which, accelerated by the explosion pressure, are suitable for deposits in the cavity. room or interior of a container act and these at least partially replace.
- the particles are hard material components, which are characterized in that they have a higher hardness than the wall-forming material. This gives the particles accelerated by the explosion abrasive properties.
- the hard material components have a Mohs hardness of preferably 3 (4.5) or greater, more preferably 4 (5.0) or greater, and more preferably 5 (6.5) or greater. Most preferred hardnesses are 6 (37.0) or higher. In brackets the absolute hardness is given by Rosiwal.
- the particles are preferably in granular form.
- the grain size can range from 0, 1 to 4 mm.
- Preferred particle sizes are from 0.2 to 3 mm, in particular from 0.5 to 2 mm.
- the particles are preferably made of a chemically inert, for. B. rock-like material.
- the particles may in particular be made of or contain natural stone material or artificial stone material.
- the particles are particularly preferably made of a rock-forming material, such as quartz, or contain this. You can, however, z. B. also consist of metal or contain this.
- the particles are particularly preferably made of commercial sand.
- the particles can be present as round grain. However, the cleaning effect can be enhanced if the particles are sharp-edged or have sharp edges.
- the particles can be embedded between two layers of a multi-layer container shell wall. The particles can be between these two layers, for. B. by gluing, be fixed. The particles can also move freely between these two layers or at least limited freely movable, z. B. in chambers, be arranged.
- the particles can also be integrated or incorporated into a layer of the container casing wall. For this purpose, the particles are integrated, for example, in the production of the sheet-like layer or wall material in this. However, the particles can also be applied to one or both surfaces of a layer of the container shell wall and with this, z. B. via an adhesive bond to be connected.
- the wall of the container casing or at least one layer thereof is at least partially segmented.
- the surface segments are delimited from one another via weakened areas.
- the weakened areas can be lines of weakness or areas of weakness.
- the attenuation ranges can be z. B. by thin areas (opposite the surface segments), by perforations, by cuts or generally by a structural weakening of the wall or layer material over a defined area.
- segmentation or the weakening areas are now designed such that the individual segments separated in the explosion of the mixture in the interior of the container shell along the weakened areas of the adjacent segments and the separated segments are thrown as independent particles by the explosion pressure.
- this embodiment can be combined with the embodiments described above, according to which separate particles are incorporated or incorporated into the container wall or in a layer of the container wall.
- Another invention which is independently combinable with the above-described invention, also relates to a flexible and, in particular, foldable container casing which can be inflated with an explosive mixture for use in a process for removing deposits in the interior of containers by means of blasting technology
- the inventive container casing is characterized by the fact that the wall of the container casing is constructed in a multi-layered manner and has an outermost outermost layer and an innermost layer facing the interior, and a functional structure is formed between the outermost and innermost layers.
- the wall of the container shell or its layers may consist of the above-mentioned materials.
- the container casing wall between the outermost layer and the innermost layer facing the interior has at least one, preferably a plurality of, chambers which can be filled with each other and can be filled with a gas, a liquid or a flowable solid, such as powder or sand.
- Communicating means that cavities of the chambers are connected to each other, so that the filled substances can circulate between the chambers, so that only one or only a few or fewer inlet openings are to be provided as chambers.
- two adjacent layers or partial walls of a container shell wall via flexible connecting members for.
- the connecting and spacing elements serve as limiting means for driving the chambers between the two layers or partial walls with a gas, so that the said layers or partial walls can only be pushed apart beyond the maximum transverse extent of the connecting and spacing elements.
- the interconnected via the flexible connecting and spacing elements layers or partial walls form in the swollen state of one or more hollow chambers.
- the connecting and spacing elements can be designed as flat connection webs or as line or lace or filament-shaped elements.
- the flat connecting webs may be connected to one another and form chamber walls.
- two wall sections lying opposite one another and forming the interior of the container casing are connected to one another via flexible connection and spacing elements crossing the said interior space.
- the connecting and spacing elements serve here as a limiting means in driving the interior space between the two walls with a gas, so that the walls can be pushed apart only over the maximum transverse extent of the connecting and spacing elements.
- the interior is preferably divided in the swollen state via the flexible connecting and spacing elements into a plurality of hollow chambers communicating with each other.
- the connecting and spacing elements can be designed as flat connection webs or as line or lace or filament-shaped elements.
- the flat connecting webs may be connected to one another and form chamber walls.
- FIG. 1 Another embodiment of a container casing, which may be regarded as an independent invention, but which may also occur in combination with one of the described embodiments of container casings, also encloses with its container wall an interior or receiving space which is open to the outside through an inlet opening.
- the container shell can be fastened via the inlet opening to a longitudinal component.
- the inlet opening is now arranged at the end of a tubular or neck-shaped extension of the container casing.
- the extension connects the inlet opening with the actual interior of the container shell.
- This interior is characterized by a significantly larger diameter than the tubular extension, z. By a multiple of the diameter of the continuation.
- the extension is part, in particular integral part of the container shell. He is therefore also part of the utility material, which is destroyed in the explosion. Thanks to the tubular, flexible extension, the container shell with its, the explosive mixture receiving interior can be brought even better to those to be cleaned, without, for example, to the reusable parts of the device special modifications must be made.
- the tubular extension or section has z. B. at least a quarter, preferably at least one third and in particular at least half the total length of the container shell.
- the tubular extension is z. B. so that it can be bent without significant cross-sectional constriction or a bending can be performed.
- the length of the tubular extension is for example 0.3 m or more, in particular 0.5 m or more.
- the tubular extension can reach up to several meters in length depending on the purpose. So this z. B. reach a length of 2 to 30 m.
- the diameter of the tubular extension can z. B. 20 to 200 mm, in particular 50 to 100 mm.
- the tubular extension preferably forms a connection section to a device, to which the container can be fastened.
- the tubular extension is in this case preferably at least twice and in particular three times as long as the connecting portion, over which rests the container of the device.
- the invention further relates to a device with a container shell according to the invention for removing deposits in containers by means of explosive technology.
- the apparatus includes a longitudinal member having a handle-side and a cleaning or explosive-side end portion, wherein the container-side cover is attached to the cleaning-side end portion.
- the longitudinal component is preferably a lance-like or tube-like longitudinal body.
- the longitudinal component is z. B. formed as a cleaning lance.
- the device further comprises supply lines for supplying a flowable, explosive mixture or its starting components into the interior of the container casing.
- the supply lines can be integrated in the longitudinal body and lead through it.
- tube-shaped longitudinal bodies with one or more end-side outlet openings on the explosion side are suitable for this purpose.
- the (gaseous) components for forming the explosive mixture are preferably from suitable pressure vessels, eg. B. commercially available gas bottles.
- the longitudinal component can at its explosive end portion a protective device, for example in the form of a one-sided, in particular in the direction of insertion open protective container, for. B. in the form of a bell or a funnel, in which the folded or not swollen container shell stowed and protected in the (hot) cavity of a container to be cleaned can be inserted.
- the container casing is ejected from the protective container into the container cavity by unfolding the same from the protective container only immediately before the cleaning cycle by driving the container casing with the explosive mixture and / or by introducing a weighting material described below into the container casing.
- the device contains a further supply line for feeding or introducing a flowable weighting material (liquid or bulk material such as powder) into the interior of the container casing or into at least one hollow chamber between two layers or partial walls of the container casing wall.
- a flowable weighting material liquid or bulk material such as powder
- Gravitational weighting tends to flow through the chambers and collect in a lower portion, so that the container casing is lowered by the gravity of the material being deposited and accumulated in a lower portion is pulled.
- narrow gaps are formed, for example, between bundles of tubes in the interior of incinerators whose surfaces must also be freed from deposits.
- the invention further relates to a method for removing deposits in containers by means of explosive technology, wherein a flexible and in particular foldable or rollable container shell inserted into the interior of a container to be cleaned, expanding under expansion with an explosive mixture and the explosive mixture is exploded.
- a container casing or device according to the invention is preferably used as described above.
- the ignition of the explosive mixture is carried out by means known in the art. This is preferably done by electrically triggered spark ignition, by auxiliary flames or by pyrotechnic ignition with the help of appropriately mounted ignition means and igniters.
- the ignition means are preferably mounted in the region of one of the end sections of the longitudinal component, on a pipe itself or the container casing.
- Actuation of the igniter as well as the flow of the inflow of the components or the expiration of the inflating the container shell is preferably done and for safety's sake by means of a control device.
- a flowable weighting material for. B. in the form of a liquid, such as water, or bulk material, in particular sand or powder introduced into the interior of the container shell or in at least one hollow chamber between two layers of the container shell wall.
- the weighting material is preferably introduced into the interior of the container casing before and / or during the introduction of the explosive mixture or its components. In this way, the container shell is pulled by the force of gravity of the introduced, flowable material in the container down.
- the weighting material is previously integrated into the container wall or applied to it.
- the weighting material here is preferably arranged in the front, cleaning-side end section of the container, so that the container is pulled down by the weight of the weighting material in the interior of the system to be cleaned.
- the weighting material can be made of the same material or correspond to the particles which are arranged on and / or in the container wall in order to increase the cleaning effect, as described above.
- the weighting material is arranged over wide areas of the container casing, but applied in the front region of the container casing in a higher density on the container wall and / or integrated into this than in the other areas.
- the course of a blast in a container is done in a preferred embodiment as follows:
- a container shell is fixed, e.g. attached, clamped or glued with adhesive tape.
- cooling is activated for the container shell.
- the longitudinal member is inserted from the outside into the container to be cleaned, e.g. through a manhole, so that the cleaning-side end portion of the longitudinal member including the container shell is placed in front of the surface to be cleaned.
- an explosive mixture or its components is introduced into the container casing by means of one or more supply lines with expansion of the same;
- the ignition device is actuated and triggered the explosion.
- Gaseous components can be directly injected from gas cylinders via separate supply lines attached to the longitudinal component or integrated into the container casing and mixed there.
- the erfmdungsgemtreu apparatus and the associated cleaning method are particularly suitable for cleaning of interiors of incinerators with sticky, prone to caking fly ash, caused especially by the combustion of coal, garbage, sewage sludge or hazardous waste. This is especially true in the area of steam generators of incinerators.
- the cleaning process can also be used to remove soiling in other plants. apply with hard dirt deposits, such as in flue gas cleaning systems, limescale in hot water generators, heat exchangers and steam generators, as well as paper mills, silos and in the cement industry.
- the blast cleaning can be carried out during the operation of a system, ie on-line, or in still hot containers and extremely targeted and precisely metered.
- the container casing according to the invention can be used, for example, in a device and a method as described in detail in EP 1 362 213 B1.
- the inventive container casing and the associated device or the associated method enable a more efficient cleaning of container interior.
- the container casing formed according to the invention fulfills a further function in that the particles stored in it are thrown onto the deposits during the explosion and lead to an additional spalling of deposits. The cleaning effect is thus combined, on the one hand by the blast wave of the explosion and on the other hand by the particles impinging on the surfaces.
- Figure 1 a device for blast cleaning
- Figure 2 a first embodiment of a flexible container shell
- Figure 3 a further embodiment of a flexible container shell
- Figure 4 a further embodiment of a flexible container shell
- FIG. 5 shows a cross section through the wall of the container casing according to FIG. 4;
- Figure 6 further embodiments of flexible container cases;
- FIG. 7 shows a further variant of a flexible container casing
- FIG. 8 shows a further variant of a flexible container casing
- Figure 9 a non-inflated, folded container shell.
- FIG. 1 schematically shows a device 1 for carrying out the cleaning method according to the invention for removing deposits, such as caking or slagging in containers and installations, in particular incinerators.
- the device 1 comprises a lance-shaped tube-like longitudinal member 2 with an integrated supply line (not shown) through which the gaseous, explosive mixture is guided from a handle-side end portion 3a to an explosive-side end portion 3b.
- the gaseous, explosive mixture is z. B. via a flexible feed line 7 from a gas pressure vessel to the handle-side end portion 3 a and there fed into the, integrated in the longitudinal component 2 supply line.
- the individual gaseous components can also be conducted in separate supply lines to the cleaning-side end section analogously thereto.
- a flexible container shell 5 is mounted with inlet opening, in which the supplied gas mixture or its components is introduced.
- a protective bell 4 is attached to the cleaning-side end section 3b, which protects the container shell 5, which is still compressed or folded before filling with gas, from the action of heat (not shown).
- FIG. 2 now shows a first embodiment of a container casing 20 according to the invention.
- the container casing encloses with its container wall 22 an interior space 21 which is open to the outside only through an inlet opening 25.
- the container wall 22 is multi-layered and has an innermost layer 23c made of a plastic material, for. B. a plastic film, which ensures the gas-tightness.
- Adjoining the innermost layer 23c are two layers 23a, 23b of paper, which have a certain heat resistance and, owing to their absorbency, can be wetted with a coolant such as water.
- particles 24, such as grains of sand are arranged, which provide the additional cleaning effect already described. The particles can be fixed between the paper layers, z.
- FIG. 3 shows a further embodiment of a container casing 30 according to the invention. With its container wall 32, this likewise encloses an interior 31, which is open to the outside only through an inlet opening 35.
- the container casing like the other container casings, can also be fastened to the inlet opening on the longitudinal component.
- the inlet opening 35 is arranged here at the end of a tubular extension 33 of the container casing 30.
- the extension 33 connects the The extension is part, in particular integral part of the container shell 30. It is therefore also part of the utility material, which is destroyed in the explosion. Thanks to the tubular, flexible extension 33, the container casing with its interior 31 accommodating the explosive mixture can be brought even better to the areas to be cleaned, without, for example, having to make any special modifications to the reusable appliance parts. Thanks to the flexibility of the extension, the inner space 31 of the container shell 30 can be positioned not only at a further distance from the explosive-side end portion of the longitudinal member (not shown) but also at an angle, ie laterally thereof.
- FIGS. 4 and 5 show a further embodiment of a container casing 40 according to the invention.
- the wall 41 of the container casing is subdivided into a plurality of contiguous segments 42.
- the segments 42 are connected to each other via weakened areas 43.
- These areas of weakening are here formed by linear thin spots in the container wall, comparable to a fragment shell of a shell or, with a somewhat less martial example, comparable to a bar of chocolate. According to this embodiment, therefore, parts of the container wall form the particles which, in conjunction with the explosive force, exert a striking force on the contaminants.
- FIG. 6 shows two further embodiments of container casings 50, 60 or cleaning methods according to the invention.
- the two embodiments have in common that it is about the introduction of a container shell in a relatively narrow gap, which z. B. is formed between adjacent tubes 56 of tube bundles in incinerators or heat exchangers.
- Conventional container casings which when filling with the explosive mixture a roundish, z. B. assume spherical shape, usually do not fit between the tubes.
- the tubes 56 are often in groups with defined Ab- Stands arranged to each other. One speaks also of tube bundles. Since now arranged in a boiler room tube bundles are also affected by deposits, this must also be cleaned.
- the container casing 50 or its interior has an elongated, in particular a rectangular, cross-sectional shape.
- the shape may be similar to a mattress or air mattress, cuboid.
- Two mutually opposite wall portions 52 a, 52 b of the container shell 50 are for this purpose via flexible connecting members 53, such. B. connecting webs or partitions, which lead across the interior 51, connected to each other.
- the connecting members 53 divide the inner space 51 into a plurality of mutually communicating chambers 54.
- the flexible connecting members 71 are linear, e.g. B. thread-like, lace-like, rope-like or tubular.
- the Innraum 71 of this container shell 70 therefore forms a single, contiguous chamber.
- a weighting agent 63 in this case water
- the container shell 60 is deployed and pulled with gravity support down into the gap between two rows of tubes.
- the container shell takes on an elongated shape.
- the container shell 60 can now fill with the explosive mixture or its components and bring to blasting.
- the container shell in its basic form is also already a rectangular cross-sectional shape or is cuboidal. The container shell can this z. B. as shown in Figure 6 next door or shown in Figure 7, be formed.
- FIG. 8 shows a further embodiment of a container casing 80.
- the container wall 82 is constructed in a comparable manner as a chamber system.
- the container wall 82 has two partial walls 85a, 85b, which are connected to each other via flexible connecting members 83 of the type already described in connection with previous embodiments.
- at least one chamber and preferably at least a plurality of mutually communicating chambers are formed.
- a flowable weighting means such as water
- a flowable coolant such as water
- Figure 9 shows a flexible container shell 90 in a compact non-inflated form.
- the container shell 90 can be brought into a space-saving, compact form, in particular by folding.
- the container casing can also be rolled or crumpled.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cleaning In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01941/11A CH705845A2 (de) | 2011-12-07 | 2011-12-07 | Mit einem explosionsfähigen Gemisch auftreibbare, flexible Behälterhülle für eine Vorrichtung und ein Verfahren zum Entfernen von Ablagerungen in Behältnissen mittels Sprengtechnologie. |
PCT/CH2012/000268 WO2013082731A1 (de) | 2011-12-07 | 2012-12-06 | Vorrichtung und verfahren zum reinigen von verbrennungseinrichtungen |
Publications (2)
Publication Number | Publication Date |
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EP2788703A1 true EP2788703A1 (de) | 2014-10-15 |
EP2788703B1 EP2788703B1 (de) | 2019-01-23 |
Family
ID=47429471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12805914.4A Active EP2788703B1 (de) | 2011-12-07 | 2012-12-06 | Vorrichtung und verfahren zum reinigen von verbrennungseinrichtungen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2788703B1 (de) |
CH (1) | CH705845A2 (de) |
WO (1) | WO2013082731A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2900103C (en) * | 2013-02-11 | 2020-07-07 | Bang & Clean Gmbh | Method and device for cleaning interiors of tanks and systems |
CH713804A1 (de) * | 2017-05-24 | 2018-11-30 | Bang & Clean Gmbh | Vorrichtung und Verfahren zum Entfernen von Ablagerungen in Innenräumen von Behältern oder Anlagen. |
IT202000012658A1 (it) | 2020-05-28 | 2021-11-28 | Bio Protect Group Srl | Metodo ed apparato per la pulizia a caldo o a freddo di scorie della combustione mediante onda d’urto esplosiva |
CN113757705B (zh) * | 2021-08-30 | 2022-10-28 | 西安交通大学 | 一种燃煤锅炉水平烟道吹灰器 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2745346A (en) * | 1953-05-11 | 1956-05-15 | Union Carbide & Carbon Corp | Method of charging holes with explosives |
US3064572A (en) * | 1958-01-13 | 1962-11-20 | Union Carbide Corp | Method of and means for providing a charge of water sensitive explosive in a blast hole |
US5769034A (en) | 1997-01-17 | 1998-06-23 | Zilka; Frank | Device, system and method for on-line explosive deslagging |
WO2002084193A1 (de) | 2001-04-12 | 2002-10-24 | Bang & Clean Gmbh | Verfahren zum reinigen von verbrennungseinrichtungen |
DE10132517A1 (de) * | 2001-07-09 | 2003-01-30 | Hans Eichner Gmbh & Co Kg | Verfahren und Vorrichtung zur lokalen Zerstörung kompakter Materialien in heissen thermischen Anlagen |
JP5291046B2 (ja) * | 2010-05-20 | 2013-09-18 | 株式会社神戸製鋼所 | 爆破処理用耐圧容器内の浄化方法 |
-
2011
- 2011-12-07 CH CH01941/11A patent/CH705845A2/de not_active Application Discontinuation
-
2012
- 2012-12-06 EP EP12805914.4A patent/EP2788703B1/de active Active
- 2012-12-06 WO PCT/CH2012/000268 patent/WO2013082731A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013082731A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013082731A1 (de) | 2013-06-13 |
EP2788703B1 (de) | 2019-01-23 |
CH705845A2 (de) | 2013-06-14 |
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