EP2462380A2 - Dispositif de nettoyage d'un échangeur de chaleur - Google Patents

Dispositif de nettoyage d'un échangeur de chaleur

Info

Publication number
EP2462380A2
EP2462380A2 EP10737843A EP10737843A EP2462380A2 EP 2462380 A2 EP2462380 A2 EP 2462380A2 EP 10737843 A EP10737843 A EP 10737843A EP 10737843 A EP10737843 A EP 10737843A EP 2462380 A2 EP2462380 A2 EP 2462380A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
cleaning
coil
exhaust gas
gas
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.)
Withdrawn
Application number
EP10737843A
Other languages
German (de)
English (en)
Inventor
Erwin Schiefer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2462380A2 publication Critical patent/EP2462380A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F28G3/00—Rotary appliances
    • F28G3/10—Rotary appliances having scrapers, hammers, or cutters, e.g. rigidly mounted
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • 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
    • F28G3/00—Rotary appliances
    • F28G3/08—Rotary appliances having coiled wire tools, i.e. basket type
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/30—Technologies for a more efficient combustion or heat usage

Definitions

  • the invention relates to heat exchangers, in particular tube heat exchangers, for contaminated media such as exhaust gas, with a gas inlet opening and a gas outlet opening, m i t a Temperiermediumseintrittsö réelle and a Temperiermediumsaustrittsö réelle and a cleaning device.
  • Modern solid fuel boilers usually have facilities for regular cleaning of the heat exchanger surfaces. Corresponding cleaning spindles are activated at regular intervals by the control of the systems and remove soot and dust deposits from the heat exchanger surfaces in order to keep the efficiency of the systems as constant as possible over the period of use.
  • tubular heat exchangers and vertical arrangement using cleaning spindles which are equipped with appropriate cleaning knives, which remove the settling during operation of the system soot and dust from the heat exchanger surfaces.
  • the systems based on this principle have the disadvantage that the cleaning knives are rigidly attached to the cleaning spindle. As a result, for reasons of thermal expansion and manufacturing tolerances caused by the radius of the cleaning knife must always be smaller than the inner radius of the heat exchanger tube to avoid blocking the cleaning spindles.
  • DE 10 2004 031 220 A1 proposes a cleaning spindle for solid fuel boilers, which carries at least one cleaning knife which extends over the length of the heat exchanger surface to be cleaned, and that at least in the middle and at its lower end in each case loosely inserted in guides on washers of the cleaning spindle.
  • the cleaning knives stand out of the guide grooves parallel to the heat exchanger surface. In the middle of their length, the cleaning knives are each supported by wedge-shaped supports, which are basically the guide groove of the middle disc against the heat exchanger surface.
  • a disadvantage of this design is that while the cleaning knives are arranged at their two free ends slightly movable relative to the revolving cleaning spindle and so unevenness on the heat exchanger surface, which are located in each case at the level of its two end portions compensate. Due to the wedge-shaped supports, with which the cleaning blades are supported in the middle of their longitudinal sides, however, in each case against the central disc of the cleaning spindle, unevenness of the heat exchanger surface along the central portion of the cleaning blade can not be compensated, which continues at least in this central portion to form undesirable Deposits on the heat exchanger surface leads. Furthermore, it is disadvantageous that the cleaning blades are rigid over their entire length.
  • the disks shown in DE 10 2004 031 220 A1 act on the cleaning spindle by their arrangement transversely to the longitudinal axis direction of the cleaning spindle or transversely to the flow direction of the gas flow such as flow breaker.
  • the desired effects of the better turbulence of the gas stream, which effect improved heat transfer are disadvantageously associated with a high flow loss due to the free cross-sectional area of the tubular heat exchanger greatly reduced by the disks.
  • the high flow or pressure loss must therefore be compensated by correspondingly powerful gas delivery pumps, resulting in at least increased operating costs when using such a cleaning spindle with transverse disks. It is therefore an object of the present invention to provide a heat exchanger with a cleaning device which avoids the described disadvantages of the prior art.
  • the cleaning device should be particularly suitable for use in tubular heat exchangers, which are flowed through by heavily contaminated media such as exhaust gas from a wood gasification.
  • a heat exchanger in particular a tube heat exchanger for contaminated media such as exhaust gas, a gas inlet opening and a gas outlet opening, a Temperiermediumseintrittsöffhung and a Temperiermediumsaustrittsöffhung and a cleaning device, wherein in an annular gap of the heat exchanger, which is traversed by contaminated exhaust gas, a rotatable cleaning coil of Cleaning device is arranged, the outer edge of the cleaning coil at least in a portion of the outer Kochtrager situation adjacent thereto.
  • the rotatable cleaning coil is thereby set or kept in rotation during operation of the heat exchanger.
  • the outer edge of the cleaning spiral touches the outer transfer yield.
  • Unnecessary depreciation is caused by incomplete combustion residues, soot, dust, etc., which, due to their poor thermal conductivity, would impair the heat transfer through the transformer surface and thus the overall efficiency of the heat exchanger, are continuously loosened and loosened by the outer edge of the cleaning coil and removed from the outer transmitter surface.
  • the loosened deposition particles are entrained with the gas flow and separated, for example, in their own separation devices from the gas stream.
  • the dirt particles are thereby promoted due to the centrifugal forces acting in the direction of the outer transformer surface.
  • the gas flow is comparable to the passage of a cyclone in a spiral rotational movement and thereby at least partially cleaned of dirt particles and leaves the heat exchanger advantageously with an at least lower loading of impurities.
  • the free flow cross section of the annular gap is through the rotatably arranged Cleaning spiral not reduced or at most very low.
  • the flow resistance of the contaminated medium in the annular gap of the heat exchanger according to the invention is advantageously increased only slightly.
  • the heat exchanger according to the invention can likewise be used for temperature control, ie for cooling as well as for heating contaminated liquid media, or for tempering gas-liquid mixtures contaminated with solids.
  • the inner edge of the cleaning spiral at least in a section of the inner 1952trager
  • Heat exchangers which are subjected to a tempering medium only either on the inner transfer surface, or on the outer transfer surface of the annular gap, in which therefore not the entire available Kochtrager Structure is used for heat transfer, are also encompassed by the invention.
  • the cleaning coil is coupled in terms of movement with a drive which is arranged on the outside of the heat exchanger.
  • the cleaning coil is connected to a drive shaft to the drive in a heat exchanger according to the invention.
  • a preferred embodiment of a heat exchanger is characterized by a hermetically sealed passage of the drive shaft through the housing of the heat exchanger.
  • the cleaning coil made of a spirally wound, strip-shaped material.
  • the lateral surface of the core tube provides in a conventional screw conveyor a large, relative to the helix immobile surface on which can deposit impurities and thus the free cross-sectional area is reduced in the annular gap.
  • a cleaning coil which is wound up like a coil spring, can be used as a cleaning device according to the invention.
  • the cleaning spiral is made of a material with high mechanical strength, preferably of metal.
  • the cleaning coil is particularly advantageously provided at its inner edge and / or at its outer edge with a cleaning edge.
  • the heat exchanger can be adapted to a wide variety of operating conditions.
  • the cleaning edge can be designed to be interchangeable and replaced as a wearing part after a certain period of operation.
  • optionally different cleaning edges with different mechanical strengths can be used.
  • the cleaning coil can thus be made particularly economically from a mechanically less resilient material.
  • a sump container for receiving impurities is arranged in a heat exchanger below the level of the cleaning coil.
  • the deposits which are removed during operation of the cleaning coil of the outer and of the inner transformer surface and which are entrained with the gas flow, get into the sump, which is arranged below the cleaning coil.
  • an inspection opening is provided in the housing in a heat exchanger according to the invention below the level of the cleaning coil.
  • the inspection opening which is expediently arranged in the vicinity of the sump container, enables simple and rapid maintenance of the heat exchanger according to the invention in the event of a fault.
  • a further advantageous feature of a heat exchanger according to the invention is characterized in that at least one distributor device for discharging a cleaning medium is provided in the interior of the annular gap.
  • the distributor device may, for example, comprise a plurality of nozzles for discharging the cleaning medium, which are arranged at the same or at different levels of the inner and / or outer transmitter surface.
  • the desired, advantageous washing effect of the exhaust gas is achieved in a section of the annular gap located downstream of the distributor device, viewed in the flow direction of the exhaust gas.
  • Other embodiments of a distribution device according to the invention for the task of a cleaning medium are conceivable.
  • the cleaning medium for example, within the standing coat the inner Kochtrager arrangements be promoted upwards.
  • the uppermost portion of the inner Studentstrager design can be designed as tapered upwardly tapering distributor section with horizontal peripheral spoiler edge, so that the conveyed through the spoiler edge cleaning medium when descending on the gas flow side facing the inner Studentstrager statue initially in the conical distributor section as a uniformly thin film over the distributed throughout the circumference of the inner transformer surface evenly flows down on this lateral surface. Due to the large surface area between the thin film of the cleaning medium and the gas flow, a particularly good washing effect is achieved and the contaminated exhaust gas is correspondingly freed from impurities.
  • the contaminants, which are bound by the downflowing film of the cleaning medium arrive at the lower end of the heat exchanger in the sump tank, are transported from there to the outside and thus separated from the gas stream.
  • the distributor device is arranged between the gas inlet opening and the gas outlet opening.
  • the distributor device is arranged approximately centrally between the gas inlet opening and the gas outlet opening.
  • the gas flow in the section between the gas inlet opening and the distributor device, the gas flow is dry-cleaned by the centrifugal force, comparable to the cleaning in a cyclone, in the section between the distributor device and the gas outlet opening, the gas flow is also washed in addition to the mechanical cleaning.
  • the invention is by no means limited to embodiments of stationary heat exchangers with a vertically arranged annular gap, but instead comprises all installation variants.
  • lying horizontally disposed heat exchanger with a horizontally flowed through annular gap or obliquely erected heat exchanger of the invention are encompassed.
  • FIG. 1 shows in a schematic sectional view from the side a first embodiment variant of a heat exchanger according to the invention with a cleaning device
  • FIG. 2 shows in a schematic sectional view details of a second embodiment of a heat exchanger according to the invention with two tubular sections with cleaning devices;
  • FIG 3 shows in a schematic sectional view details of a third embodiment of a heat exchanger according to the invention with two tubular sections with cleaning devices.
  • FIG. 1 an inventive heat exchanger 1 is shown with a tubular heat exchanger section 2 in section.
  • a cleaning device 3 comprises a cleaning coil 4, which is made of a spirally wound metal strip similar to a coil spring, and which is provided at its outer edge 5 and at its inner edge 6 each with a cleaning edge 7 with high mechanical strength.
  • the cleaning coil 4 is located within an annular gap 8, which is located between an outer Studentstrager thoughts 9, which is formed by an outer tube shell, and an inner Mattertrager requirements 11, which is formed by an inner tube shell, which is concentric with the outer tube shell.
  • the rotatably arranged cleaning coil 4 has the task during the operation of the heat exchanger 1 for the cleaning of the largest possible portion 10 of the outer transmitter surface 9 or the largest possible portion 12 of the inner transformer surface 12 to provide.
  • the cleaning edges 7 of the rotating or rotating cleaning spiral 4 touch the surfaces 9 and 11 along the corresponding sections 10 and 12, respectively.
  • the fixed inner tube shell of the inner Studentstrager nature 11 is closed at its upper end with a corresponding cover. During operation, it is thus ensured that the biomass to be gasified passes exclusively from above into the annular gap 8 and is heated therein.
  • the cleaning shaft 4 is coupled in terms of movement by a drive shaft 14 with its own drive 13 together with the associated gear and is driven by the drive shaft 14 in the direction of rotation 17.
  • the rotatable drive shaft 14 is at its upper end with an adapter 16 for attachment of the cleaning coil 4 is provided.
  • the housing 18 of the heat exchanger 1 has on its upper side a hermetically sealed passage 19 for the drive shaft 14.
  • the housing 18 is laterally provided with a gas inlet opening 20 and further below the level of the gas inlet opening 20 with a gas outlet opening 21.
  • the flowing into the gas inlet opening exhaust gas 22 passes into the tubular heat exchanger section 2 and is passed through the annular gap 8, in which the rotating cleaning coil 4 for a swirl of the gas flow, to the gas outlet opening 21 and leaves as effluent exhaust gas 23, the heat exchanger. 1
  • a temperature control medium is conveyed through the heat exchanger 1, wherein the required for this, located outside of the heat exchanger 1 peripheral pipes, fittings and aggregates are not shown in the figures.
  • the housing 18 is provided with a Temperiermediumseintrittsöffhung 24 and a Temperiermediumsaustrittsöffhung 25, the tempering flows in the direction of arrow 26 in the heat exchanger, flows along the gas flow away, each rear side of the outer Studentstrager thoughts 9 and / or the inner Studentstrager thoughts 11 and leaves the heat exchanger 1 in the direction of arrow 27 through the Temperiermediumsauseriesöffhung 25th
  • Cooling water is used, for example, as the temperature control medium in order to cool the hot exhaust gas in the arrangement shown in FIG. 1 in DC operation.
  • a revision flange 28 which is disposed below the level of the cleaning coil 4.
  • the heat exchanger 1 can be easily cleaned after opening the inspection flange 28.
  • the sump container 29, in which the deposited impurities are collected easily accessible via the opening of the inspection flange 28.
  • the sump container 29 has, for the continuous emptying of the impurities, also a corresponding drain valve for the slurry, which is known from the prior art and therefore not shown in greater detail in FIG. 1 a shows a top view of details of the heat exchanger 1 shown in FIG. 1.
  • a horizontal sectional plane has been selected approximately in the middle of the height of the temperature-control medium inlet opening 24 shown in FIG.
  • a section of the cleaning spiral 4 arranged in the interior of the annular gap 8 can be seen.
  • the cleaning coil 4 is provided at its outer edge 5 and at its inner edge 6 each with a cleaning edge 7.
  • FIG. 2 shows details of a second embodiment of a heat exchanger 1 according to the invention in a schematic sectional view.
  • the heat exchanger 1 is provided with two juxtaposed, tubular heat exchanger sections 2 with cleaning devices 3, each comprising a cleaning coil 4.
  • the stationary heat exchanger 1 shown in Fig. 2 is used in countercurrent operation.
  • the hot exhaust gas 22 flows through the top of the housing 18 disposed gas inlet opening 20 into the annular gap 8 and is in this by the spiral, rotating cleaning coil 4 in twisting motion.
  • the rotational movement of this swirling movement corresponds to the axis direction of the drive shaft 14.
  • the swirling impurity particles are conveyed from the exhaust gas flow in the direction of the outer transmitter surface 9, which may adhere there.
  • the cooled exhaust gas leaves the heat exchanger 1 at its lower portion in the direction of arrow 23 through the gas outlet opening 21.
  • the Temperiermediumsniklauf also applies to the primary circuit of the contaminated exhaust gas, that the necessary connecting pipes and the usual units and fittings outside the heat exchanger. 1 are not shown in Figures 1 to 3.
  • the temperature control medium - here, for example cooling water - is conveyed through the lower Temperiermediumseintrittsöffhung 24 in the direction of arrow 26 in the heat exchanger 1 and leaves it in the direction of arrow 27 through the Temperiermediumsauseriesöffhung located above.
  • both the outer transmitter surface 9 and the inner transmitter surface 11 are used as transfer surfaces and are each acted upon by the temperature control medium at their rear sides facing away from the gas flow.
  • a distributor device 31 for discharging a cleaning medium 32.
  • the cleaning medium 32 is conveyed from the outside through a feed line 30 into the heat exchanger 1 and within the fixed shell of the inner transfer surface 11 further promoted to the level of the distributor device 31.
  • the cylindrical jacket of the inner transmitter surface 11 is closed at its top.
  • the distributor device 31 comprises, for example, a plurality of nozzle-shaped openings through which the cleaning medium, for example water, is introduced into the hot exhaust gas flow.
  • the cleaning medium for example water
  • the contaminated exhaust gas is also washed. Due to the introduced or sprayed cleaning medium 32 impurity particles are washed out of the exhaust stream and get bound as slurry in the underlying sump container 29th
  • FIG. 3 comparable to FIG. 2, in a schematic sectional view, details of a third embodiment variant of a heat exchanger 1 according to the invention with two tubular heat exchanger sections 2 arranged side by side in parallel with cleaning devices 3 are shown.
  • the heat exchanger 1 shown here is likewise equipped with a feed line 30 for a cleaning medium 32.
  • the distributor device 31 for supplying the cleaning medium 32 into the annular gap 8 through which the exhaust gas flows is designed differently than in the variant shown in FIG. 2.
  • the fixed cylindrical shell of the inner transmitter surface 11 is designed along its uppermost portion as a tapered distributor portion 33 having an overflow opening as an outlet for the cleaning medium 32 at its highest point.
  • the cleaning medium 32 is distributed as a thin film evenly over the entire circumference of the inner Studentstrager thoughts 11 and runs in the annular gap 8 as a film along the cylindrical shell of the inner Studentstrager thoughts 11 further down until the excess cleaning medium finally enters the sump container 29 and is collected there.
  • the wetted by the film of the cleaning medium 32 large surface of the inner Studentstrager thoughts 11 a very effective gas scrubbing is achieved.
  • the impurities of the exhaust gas flow detected by the film of the cleaning medium 32 flowing down are deposited as slurry in the sump container 29 and can be withdrawn therefrom from the heat exchanger 1 according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cleaning In General (AREA)

Abstract

L'invention concerne un échangeur de chaleur (1), en particulier un échangeur tubulaire, pour des milieux contaminés, tels que par exemple des gaz d'échappement, comprenant : une ouverture d'entrée de gaz (20) et une ouverture de sortie de gaz (21), une ouverture d'entrée d'agent de thermorégulation (24) et une ouverture de sortie d'agent de thermorégulation (25), ainsi qu'un dispositif de nettoyage (3). Dans une fente annulaire (8) de l'échangeur de chaleur (1) à travers lequel circule le gaz d'échappement contaminé, est disposée une hélice de nettoyage (4) du dispositif de nettoyage (3), hélice dont le bord extérieur (5) est, au moins dans une partie (10) de la surface de transfert extérieure, adjacent à cette surface.
EP10737843A 2009-08-04 2010-07-19 Dispositif de nettoyage d'un échangeur de chaleur Withdrawn EP2462380A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0122909A AT508157B1 (de) 2009-08-04 2009-08-04 Vorrichtung zum abreinigen eines wärmetauschers
PCT/EP2010/060430 WO2011015448A2 (fr) 2009-08-04 2010-07-19 Dispositif de nettoyage d'un échangeur de chaleur

Publications (1)

Publication Number Publication Date
EP2462380A2 true EP2462380A2 (fr) 2012-06-13

Family

ID=43038174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10737843A Withdrawn EP2462380A2 (fr) 2009-08-04 2010-07-19 Dispositif de nettoyage d'un échangeur de chaleur

Country Status (5)

Country Link
US (1) US20130168044A1 (fr)
EP (1) EP2462380A2 (fr)
AT (1) AT508157B1 (fr)
CA (1) CA2806297A1 (fr)
WO (1) WO2011015448A2 (fr)

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AT15025U3 (de) * 2016-05-18 2017-05-15 Ökofen Forschungs- Und Entw M B H Heizeinrichtung
AT517955B1 (de) * 2016-05-18 2017-06-15 Ökofen Forschungs- Und Entw M B H Heizeinrichtung
RU181461U1 (ru) * 2018-03-21 2018-07-16 Павел Евгеньевич Портнов Устройство для очистки трубки теплообменного аппарата
CN110262635B (zh) * 2019-06-19 2020-12-18 四川蜀天信息技术有限公司 一种防尘效果好可靠性高的软件测试设备
CN111878842B (zh) * 2020-08-07 2023-07-14 山东创佳新能源科技有限公司 一种具有防堵塞结构的原油加热装置
CN112611253B (zh) * 2020-12-01 2022-06-07 内蒙古金石镁业有限公司 一种冷却器自动清扫装置及其清扫控制方法
CN114413325B (zh) * 2021-12-30 2023-07-28 浙江阳帆节能开发有限公司 一种空气能智能变频空调
CN114777535B (zh) * 2022-05-13 2022-11-29 江西黑猫炭黑股份有限公司 一种提高炭黑油余热综合利用的装置
CN116878333B (zh) * 2023-09-05 2023-11-07 山东瑞多节能环保科技有限公司 一种污水换热器在线清洗装置及清洗方法

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JPS5535912A (en) * 1978-09-06 1980-03-13 Mitsui Toatsu Chemicals Pipe inside scratchinggoff device
FR2439630A1 (fr) * 1978-10-23 1980-05-23 Montage Cie Indle Dispositif de nettoyage de tubes conduisant des gaz charges d'impuretes et d'epuration des gaz
US5228503A (en) * 1991-05-17 1993-07-20 Smith Douglas W P High viscous fluid heat exchanger
US5759498A (en) * 1996-12-12 1998-06-02 United Microelectronics Corp. Gas exhaust apparatus
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DE102004031220B4 (de) 2004-06-28 2008-07-17 Bernd Dipl.-Ing. Langer Reinigungsspindel für Feststoffbrennkessel
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Also Published As

Publication number Publication date
US20130168044A1 (en) 2013-07-04
WO2011015448A2 (fr) 2011-02-10
WO2011015448A3 (fr) 2011-07-28
CA2806297A1 (fr) 2011-02-10
AT508157A4 (de) 2010-11-15
AT508157B1 (de) 2010-11-15

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