EP2210657A1 - Dispositif de mélange destiné au mélange d'eau et de vapeur d'eau dans une station de dérivation - Google Patents

Dispositif de mélange destiné au mélange d'eau et de vapeur d'eau dans une station de dérivation Download PDF

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Publication number
EP2210657A1
EP2210657A1 EP09001085A EP09001085A EP2210657A1 EP 2210657 A1 EP2210657 A1 EP 2210657A1 EP 09001085 A EP09001085 A EP 09001085A EP 09001085 A EP09001085 A EP 09001085A EP 2210657 A1 EP2210657 A1 EP 2210657A1
Authority
EP
European Patent Office
Prior art keywords
wire
water
mesh
mixing device
wire mesh
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Withdrawn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
EP09001085A
Other languages
German (de)
English (en)
Inventor
Arne Dr. Grassmann
Christian Musch
Heinrich Dr. Stüer
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP09001085A priority Critical patent/EP2210657A1/fr
Priority to CN201080006140.XA priority patent/CN102300628B/zh
Priority to PCT/EP2010/050122 priority patent/WO2010086199A1/fr
Priority to US13/146,415 priority patent/US8641019B2/en
Priority to EP10700226.3A priority patent/EP2382033B1/fr
Publication of EP2210657A1 publication Critical patent/EP2210657A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
    • B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
    • B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/313—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit
    • B01F25/3131—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced in the centre of the conduit with additional mixing means other than injector mixers, e.g. screens, baffles or rotating elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/45—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads
    • B01F25/452—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces
    • B01F25/4523—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through sieves, screens or meshes which obstruct the whole diameter of the tube
    • B01F25/45231—Mixers in which the materials to be mixed are pressed together through orifices or interstitial spaces, e.g. between beads characterised by elements provided with orifices or interstitial spaces the components being pressed through sieves, screens or meshes which obstruct the whole diameter of the tube the sieves, screens or meshes being cylinders or cones which obstruct the whole diameter of the tube, the flow changing from axial in radial and again in axial

Definitions

  • a bypass station serves to supply the steam formed in a steam generator as a bypass past a (steam) turbine directly to a condenser.
  • a bypass is necessary, for example, if the running times of the steam generator and the turbine are not synchronous with one another. For example, water vapor is generated before the startup of the turbine or even during the shutdown of the turbine, which can not be used by the turbine in these operating conditions.
  • the vapor pressure is usually throttled in the bypass station on the one hand, on the other hand, the water vapor is cooled by injection of water. The water injected into the water vapor is heated and evaporated, which in turn cools the water vapor.
  • water always refers to water in its liquid state of aggregation, in particular in the form of droplets, while steam refers to the water in its gaseous state of aggregation.
  • the water is often injected through a plurality of nozzles aligned transversely to the flow direction and mixed with the water vapor.
  • the water is injected into the water vapor in a (single) jet, wherein the mixing is usually realized by a diaphragm.
  • a diaphragm Disadvantageously, in both variants for mixing - and thus for successful cooling - comparatively large mixing lengths are required.
  • used mixing diaphragms are exposed to relatively high wear by so-called drop impact.
  • the invention has for its object to provide a device that makes it possible in connection with a diverter, the diverted water vapor by mixing with water to cool particularly effectively.
  • a mixing device which comprises a so-called static mixer, which is essentially formed from a wire mesh.
  • the wire mesh is produced by at least one substantially intertwined wire to mesh.
  • the mixer is mounted downstream of a water injection with respect to a flow direction predetermined by the water vapor, so that the mesh flows through the mixture of water and water vapor.
  • a mesh is in each case a wire frame, as well as a bordered by this wire frame opening referred to.
  • the term is used regardless of whether the stitch is strictly knit (eg, knitted, knitted, crocheted, etc.) or whether the stitch is made by another weave or interweaving of a wire or wires.
  • wire is a thin, long, flexible piece of metal, in particular with a circular cross-section designated. However, other cross-sectional shapes are also conceivable in principle.
  • the wire is made of stainless steel.
  • the wire mesh differs in particular from a perforated plate, in which a plurality, usually substantially round openings are introduced into a metal sheet.
  • the meshes of the wire mesh are traversed by the mixture of water droplets and water vapor.
  • the respective wire frame vortices which is a cross-mixing of the water vapor flow and thus force a mixing of the water droplets with the water vapor.
  • the water advantageously penetrates as far as possible into the core of the steam flow.
  • the drops of water are cut to the wire frame, resulting in a faster evaporation of the water and thus a more effective cooling result.
  • the wire network dissipates heat via the heat-conducting metal. Overall, a particularly effective cooling of the water vapor is achieved by installing the mixer of wire mesh.
  • the mixer has a comparatively high stability, in particular, the wire is particularly resistant to tensile loads.
  • the mixer advantageously has a high temperature resistance.
  • An additional advantage of the mixer formed from a wire mesh is its filtering effect: Sometimes it may happen during maintenance of the diverter that larger parts are forgotten. These can cause great damage when they get into the condenser. They may be intercepted by the wire mesh.
  • the stitches are essentially formed by a wire knit or a knit wire.
  • the wire mesh is called, if the stitches are knitted in the literal sense.
  • the stitches are formed in that a plurality of loops arranged in a row are respectively guided through a loop of an adjacent row. This gives the wire mesh a particularly high stability.
  • the wire mesh can be made in particular of a single wire.
  • the wire mesh is formed of a wire mesh.
  • a braid that stands out Wire mesh characterized in that a plurality of wires are each substantially entwined at an angle to each other to form meshes with each other.
  • the mixer can essentially be designed in the form of a round disk which can be mounted in the cross-section of a (round) pipeline.
  • the mixer, or its wire mesh is generally shaped essentially as an elliptical paraboloid.
  • the net is intended to be mounted in the pipeline in such a way that, in a longitudinal section (with respect to the pipeline), it essentially has the shape of an upstream open parabola.
  • the network is given a particularly high stability with respect to the steam flow.
  • the wire mesh is dimensioned such that a mesh size in relation to the diameter of the wire is selected such that a free flow area is at least 50% of the total area of the wire mesh.
  • the free flow area is essentially formed by the mesh openings, while the total area is formed both by the mesh openings and the respective associated wire frame.
  • the wire frames of the mesh of the water vapor flow then advantageously oppose only a comparatively small cross-sectional area, on the one hand the pressure loss caused by the installation of the mixer is comparatively low. On the other hand, the wire frames are therefore relatively less exposed to erosion by drop impact.
  • FIG. 1 is in a longitudinal section part of a diverter 1 roughly indicated schematically.
  • the bypass station 1 comprises a here horizontally aligned pipe 2 for the transfer of water vapor 3, starting from a - not shown here - steam generator (in the illustration left of Umleitstation 1 arranged) to a - also not shown - capacitor (right of Umleitstation).
  • a flow direction 4 of the water vapor 3 indicated by arrows accordingly runs from left to right.
  • the pipe 2 Upstream in the flow direction 4, the pipe 2 is preceded by a Laval nozzle 5, which serves on the one hand for throttling the vapor pressure, on the other hand as a measuring point for the flow velocity.
  • an inlet nozzle 7 for the injection of water 8 in the flowing water vapor 3 is arranged.
  • the introduced water 8 serves to cool the water vapor 3 before the transfer to the condenser.
  • the water 8 is mixed with the water vapor 3, wherein the water 8 evaporates.
  • the cooling of the water vapor 3 takes place on the one hand by the lower temperature level of the water 8 relative to the water vapor 3, on the other hand by the in the Evaporation of the water 8 absorbed evaporation enthalpy is removed from the water vapor 3.
  • a mixing device 10 is mounted in the flow direction 3 after the inlet nozzle 7 and after the Laval nozzle 5 in the pipe 2.
  • the mixing device 10 comprises on the one hand a roughly indicated fastening ring 11, on the other hand a likewise roughly indicated mixer 12, which is made of a wire mesh 13.
  • the wire mesh 13 is made in this embodiment in the manner of a chain link fence ( FIG. 2 ).
  • the mixer 12 has approximately the shape of an (oversized) thimble or a rounded hollow cone. At its closed end 14 of the mixer 12 is rounded. With its open end 15 facing annular edge 16 of the mixer 12 is mounted approximately concentric with the mounting ring 11, screwed here. In this case, the fastening ring 11 protrudes radially on both sides beyond the edge 16.
  • the mounting ring 11 is mounted between a flange 17 of the Laval nozzle 5 and a flange 18 of the pipe 2.
  • the mixer 12 is oriented such that its open end 15 of the inlet nozzle 7 or - approximately in the manner of a funnel to be filled - the flow direction 4 faces.
  • the wire mesh 13 according to the first embodiment is shown in fragmentary, greatly enlarged.
  • the wire mesh 13 is shown in particular in a prefabrication state in which it spans a plane surface aligned parallel to the plane of the drawing.
  • the wire mesh 13 can then be bent into any spatial structure.
  • the wire mesh 13 already in its manufacture in a three-dimensional structure - for example in the bowl-like shape according to FIG. 1 - is shaped.
  • the wire mesh 13 is made as a wire mesh in the manner of a chain link fence.
  • the wire net 13 comprises a plurality of (round) wires 20.
  • Each wire 20 is guided in a substantially rectangular, isosceles zig-zag line so that each wire 20 has a plurality of corner points 21.
  • the wires 20 are each aligned substantially along a longitudinal direction 22 and arranged parallel to each other.
  • a wire 20 is offset to its adjacent wire 20 'such that in each case one of the vertices 21 of the wire 20 with one of the vertices 21' of the adjacent wire 20 'in a touch point 23 approximately touch.
  • each wire 20 is hooked in each case in the region of the contact point 23 with the wire 20 '.
  • Each mesh 24 is formed by a wire frame 25, each enclosing an opening 26.
  • Each wire frame 25 is defined by four points of contact 23 and their respective connecting portions 27 of the wire 20 and the adjacent wire 20 '.
  • the size of each opening 26 - the mesh size a - is dimensioned substantially larger than the diameter d of the wire 20th
  • a single wire 20 may also be guided substantially in serpentine lines, wherein it then comprises a plurality of sections, each as described above along the longitudinal direction 22 in zigzag lines, aligned substantially parallel to each other and hooked together to mesh 24.
  • each wire 20 is twisted with the adjacent wire 20 'at the points of contact 23.
  • the meshes 24 each have a substantially hexagonal shape (as commonly used in a "rabbit fence").
  • the two alternative embodiments are characterized by a particularly high dimensional stability of the mesh 24.
  • FIG. 3 is the wire mesh 13 in the prefabrication state according to FIG. 2 shown in a second embodiment.
  • the wire mesh 13 is formed by a (in this case planar) wire mesh.
  • a plurality of the wires 20 are aligned parallel to one another in the longitudinal direction 22, while on the other hand a multiplicity of the wires 20 ', so to speak as weft wires, are again parallel to one another in a transverse direction 30, approximately at right angles to the wires 20, are aligned.
  • Each wire 20 ' is interwoven in the transverse direction 30 with the wires 20 by being guided alternately once via a wire 20 and once under a wire 20 adjacent thereto.
  • all the wires 20 and 20 ' are each arranged at the same distance from one another, so that essentially square meshes 24 are formed here.
  • Each wire frame 25 is in turn defined by four points of contact 23, at each of which a wire 20 and a wire 20 'intersect, as well as the respective connecting sections 27.
  • each wire 20 ' may be alternately passed over two wires 20 and adjacent under a wire 20, respectively.
  • FIG. 4 is the wire mesh 13 again in the prefabrication state according to FIG. 2 executed as a wire knit. Similar to the first embodiment, here each wire 20 is guided in a meandering shape, wherein a plurality of loops 40 in the longitudinal direction 22 are arranged side by side. Analogous to the embodiment of FIG. 1 the wires 20 are aligned overall substantially parallel to each other, wherein in each case a wire 20 with a wire 20 'is adjacent.
  • Each loop 40 'of one wire 20' is hooked into an adjacent loop 40 of the wire 20, so that in turn a plurality of stitches 24 are formed.
  • Each stitch 24 is formed by and large by one of the loops 40 and 40 '.
  • the wire frame 25 of each loop 24 is in turn formed by four points of contact 23 (on each of which the wire 20 'is entwined with one of the wires 20 adjacent on both sides in the transverse direction 30) and the sections 27 connecting them.
  • the knitted fabric can be formed from a single wire 20 - which is guided accordingly.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Woven Fabrics (AREA)
  • Knitting Of Fabric (AREA)
EP09001085A 2009-01-27 2009-01-27 Dispositif de mélange destiné au mélange d'eau et de vapeur d'eau dans une station de dérivation Withdrawn EP2210657A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP09001085A EP2210657A1 (fr) 2009-01-27 2009-01-27 Dispositif de mélange destiné au mélange d'eau et de vapeur d'eau dans une station de dérivation
CN201080006140.XA CN102300628B (zh) 2009-01-27 2010-01-08 用于在旁通站内混合水和水蒸汽的混合装置
PCT/EP2010/050122 WO2010086199A1 (fr) 2009-01-27 2010-01-08 Dispositif mélangeur pour mélanger de l'eau et de la vapeur d'eau dans une station de dérivation
US13/146,415 US8641019B2 (en) 2009-01-27 2010-01-08 Mixing device for mixing water and water vapor in a diversion station
EP10700226.3A EP2382033B1 (fr) 2009-01-27 2010-01-08 Station de dérivation avec un dispositif mélangeur pour mélanger de l'eau et de la vapeur d'eau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09001085A EP2210657A1 (fr) 2009-01-27 2009-01-27 Dispositif de mélange destiné au mélange d'eau et de vapeur d'eau dans une station de dérivation

Publications (1)

Publication Number Publication Date
EP2210657A1 true EP2210657A1 (fr) 2010-07-28

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP09001085A Withdrawn EP2210657A1 (fr) 2009-01-27 2009-01-27 Dispositif de mélange destiné au mélange d'eau et de vapeur d'eau dans une station de dérivation
EP10700226.3A Not-in-force EP2382033B1 (fr) 2009-01-27 2010-01-08 Station de dérivation avec un dispositif mélangeur pour mélanger de l'eau et de la vapeur d'eau

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP10700226.3A Not-in-force EP2382033B1 (fr) 2009-01-27 2010-01-08 Station de dérivation avec un dispositif mélangeur pour mélanger de l'eau et de la vapeur d'eau

Country Status (4)

Country Link
US (1) US8641019B2 (fr)
EP (2) EP2210657A1 (fr)
CN (1) CN102300628B (fr)
WO (1) WO2010086199A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2623743A1 (fr) * 2012-02-06 2013-08-07 Siemens Aktiengesellschaft Dispositif d'injection d'eau pour un système de vaporisation à dérivation d'une centrale électrique
US10519832B2 (en) 2016-05-27 2019-12-31 Deere & Company Decomposition tube for exhaust treatment systems
CN114632436B (zh) * 2022-05-18 2022-08-09 北京势蓝科技有限公司 流体混合器、包含其的燃烧装置及VOCs气体的处理方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094171A (en) * 1958-03-24 1963-06-18 Gamewell Co Foam nozzle
US4830790A (en) * 1987-11-04 1989-05-16 Co-Son Industries Foam generating nozzle
EP0467147A1 (fr) * 1990-07-19 1992-01-22 Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung Corps filtrant ou catalytique
DE4122014C1 (en) * 1991-07-03 1992-05-27 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Exhaust filter for IC engine - consists of filter body formed by layers of coated filter plates made of superimposed mats of ferritic or austenitic wire etc.
EP0596155A1 (fr) * 1992-10-26 1994-05-11 Toshiharu Fukai Buse pour la production de bulles
DE19851360A1 (de) * 1998-11-08 2000-05-25 Spiegel Margret Verfahren und Anordnung zum Einbringen von Gas in Flüssigkeiten über einen neuartigen Mischer
DE10254569A1 (de) * 2002-11-21 2004-06-03 Bayosan Wachter Gmbh & Co. Kg Statikmischer für Putze
US20050035153A1 (en) * 2003-08-11 2005-02-17 Brown Daniel P. Multi-component fluid dispensing device with mixing enhancement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1773053A (en) * 1923-07-13 1930-08-12 Elliott Co Method for desuperheating steam
GB315629A (en) * 1928-09-27 1929-07-18 Franz Scheinemann Apparatus for cooling superheated steam
DE960354C (de) * 1952-04-11 1957-03-21 Albert Lob Maschinen Und Appba Heissdampfkuehler
US3872012A (en) * 1973-12-20 1975-03-18 Mc Donnell Douglas Corp Particulate separator
DE102006031816B4 (de) * 2006-07-07 2008-04-30 Siemens Fuel Gasification Technology Gmbh Verfahren und Vorrichtung zur Kühlung von heißen Gasen und verflüssigter Schlacke bei der Flugstromvergasung
CN100570147C (zh) * 2008-01-17 2009-12-16 清华大学 一种利用强吸热反应的层板发汗冷却结构

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094171A (en) * 1958-03-24 1963-06-18 Gamewell Co Foam nozzle
US4830790A (en) * 1987-11-04 1989-05-16 Co-Son Industries Foam generating nozzle
EP0467147A1 (fr) * 1990-07-19 1992-01-22 Schwäbische Hüttenwerke Gesellschaft mit beschränkter Haftung Corps filtrant ou catalytique
DE4122014C1 (en) * 1991-07-03 1992-05-27 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De Exhaust filter for IC engine - consists of filter body formed by layers of coated filter plates made of superimposed mats of ferritic or austenitic wire etc.
EP0596155A1 (fr) * 1992-10-26 1994-05-11 Toshiharu Fukai Buse pour la production de bulles
DE19851360A1 (de) * 1998-11-08 2000-05-25 Spiegel Margret Verfahren und Anordnung zum Einbringen von Gas in Flüssigkeiten über einen neuartigen Mischer
DE10254569A1 (de) * 2002-11-21 2004-06-03 Bayosan Wachter Gmbh & Co. Kg Statikmischer für Putze
US20050035153A1 (en) * 2003-08-11 2005-02-17 Brown Daniel P. Multi-component fluid dispensing device with mixing enhancement

Also Published As

Publication number Publication date
EP2382033A1 (fr) 2011-11-02
CN102300628A (zh) 2011-12-28
WO2010086199A1 (fr) 2010-08-05
US8641019B2 (en) 2014-02-04
US20110291307A1 (en) 2011-12-01
CN102300628B (zh) 2014-08-20
EP2382033B1 (fr) 2013-12-18

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