EP2382033A1 - Dispositif mélangeur pour mélanger de l'eau et de la vapeur d'eau dans une station de dérivation - Google Patents

Dispositif mélangeur pour mélanger de l'eau et de la vapeur d'eau dans une station de dérivation

Info

Publication number
EP2382033A1
EP2382033A1 EP10700226A EP10700226A EP2382033A1 EP 2382033 A1 EP2382033 A1 EP 2382033A1 EP 10700226 A EP10700226 A EP 10700226A EP 10700226 A EP10700226 A EP 10700226A EP 2382033 A1 EP2382033 A1 EP 2382033A1
Authority
EP
European Patent Office
Prior art keywords
wire
water
mesh
water vapor
mixing
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
Application number
EP10700226A
Other languages
German (de)
English (en)
Other versions
EP2382033B1 (fr
Inventor
Arne Grassmann
Christian Musch
Heinrich 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 EP10700226.3A priority Critical patent/EP2382033B1/fr
Publication of EP2382033A1 publication Critical patent/EP2382033A1/fr
Application granted granted Critical
Publication of EP2382033B1 publication Critical patent/EP2382033B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 bypassing 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 vaporization pressure in the diverter station is usually throttled on the one hand, and the water vapor is cooled by the injection of water, for example, and the water injected into the steam is heated and evaporated, thus reversing the steam is cooled.
  • 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 several 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.
  • the mixing is usually realized by a diaphragm.
  • 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.
  • the stitches are essentially formed by a wire knit or a knit wire.
  • the wire mesh is designated when 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.
  • a mesh is in each case a wire frame, as well as a bordered by this wire frame opening referred to.
  • the designation is used in particular independently of whether the stitch is made in the narrower sense as so-called knitwear (eg knitted, knitted, crocheted, etc.), or whether the stitch is made by a different weave or interlacing 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 of, 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 force a cross-mixing of the water vapor flow and thus mixing of the water droplets with the water vapor.
  • the water advantageously penetrates as far as possible into the core of the vapor 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, it is characterized by the installation of the mixer
  • Wire mesh achieves a particularly effective cooling of the water vapor.
  • the mixer Due to the production from wire, the mixer has a comparatively high stability, in particular the wire is particularly resistant to tensile loads. In addition, 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 wire mesh is formed of a wire mesh.
  • a braid that stands out Wire net characterized in that a plurality of wires are each substantially entwined at an angle to each other to form meshes with each other.
  • the wire mesh it is also conceivable to produce the wire mesh as a fabric, in which several wires are woven together in at least two units. In this case, the wires of a unit are each aligned substantially perpendicular to the wires of the second unit.
  • 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 network is intended in the
  • Piping mounted so that it has in a longitudinal section (with respect to the pipeline) substantially the shape of an upstream open parabola. This gives the network a particularly high stability 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.
  • FIG. 1 shows a schematic sectional view of a mixing device mounted in a bypass station with a mixer formed from a wire mesh for mixing water and water vapor,
  • FIG 2 shows a schematic representation of the wire network in a first embodiment according to FIG 1,
  • FIG 4 in illustration according to FIG 2, the wire mesh in each case in a further embodiment.
  • FIG. 1 a part of a diverting station 1 is indicated roughly schematically in a longitudinal section.
  • the bypass station 1 comprises a horizontally aligned pipe 2 for the transfer of water vapor 3, starting from a steam generator (not shown here) (to the left of the bypass station 1) to a condenser (also not shown) (right of the bypass station).
  • a flow direction 4 of the water vapor 3 indicated by arrows therefore runs from left to right.
  • the pipeline 2 Upstream in the flow direction 4, the pipeline 2 is preceded by a Laval nozzle 5, which on the one hand serves to reduce the vapor pressure, and on the other hand serves 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 ser 8 evaporated.
  • the cooling of the water vapor 3 takes place on the one hand by the lower temperature level of the water 8 with respect to the water vapor 3, on the other hand by the evaporation enthalpy recorded in the evaporation of the water 8 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 ( Figure 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. It is the
  • Mixer 12 is aligned 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 form, greatly enlarged.
  • 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. To produce the mixer 12, the wire mesh 13 can then be bent into any spatial structure. Alternatively, it is also possible that the wire mesh 13 is already formed in its production in a three-dimensional structure - for example in the bowl-like shape of FIG 1 -.
  • 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 right-angled, 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
  • Each wire 20 is hooked in each case in the region of the contact point 23 with the wire 20 '. This results in approximately square meshes 24.
  • 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 '.
  • 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, in which case it comprises a plurality of sections, each as described above along the longitudinal direction 22 in zig-zag lines, substantially parallel aligned with each other and are hooked together to mesh 24.
  • each wire 20 is twisted with the adjacent wire 20 'in the contact points 23.
  • the meshes 24 each have a substantially hexagonal shape (as is often used in the case of a "rabbit fence.")
  • the two adjacent wires 20 or 20 'to be in the contact points 23 in the manner of a fishing net
  • the two alternative embodiments are characterized by a particularly high dimensional stability of the meshes 24.
  • the wire mesh 13 is shown in the prefabrication state according to FIG. 2 in a second embodiment.
  • the wire mesh 13 is formed by a (in this case planar) wire mesh.
  • a multiplicity 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 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 by four points of contact 23, to each of which a wire 20 and a Wire 20 'intersect, and the respective connecting sections 27 defined.
  • each wire 20 ' can be alternately guided over two wires 20 and adjacent under a wire 20.
  • the wire mesh 13 is again designed as a wire knit in the prefabrication state according to FIG. 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 substantially parallel to one another, with one wire 20 each being adjacent to a wire 20 '.
  • 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 is 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 also be formed from a single wire 20, which is guided accordingly.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Knitting Of Fabric (AREA)
  • Woven Fabrics (AREA)

Abstract

L'invention porte sur un dispositif qui, en liaison avec une station de dérivation (1), permet de refroidir d'une manière particulièrement efficace la vapeur d'eau déviée (3), grâce à un mélange avec de l'eau (8). En tant que dispositif, il est prévu un dispositif mélangeur (10), qui comprend ce que l'on appelle un mélangeur statique (12), qui pour l'essentiel est formé d'un treillis (13) en fil métallique. Le treillis (13) en fil métallique est alors fabriqué à partir d'au moins un fil, pour l'essentiel entrelacé sous forme de mailles. Dans une situation de montage conforme, le mélangeur (12) est monté, quand on regarde dans une direction d'écoulement (4) prédéfinie par la vapeur d'eau (3), en aval d'un point d'injection d'eau (7), de façon que les mailles soient traversées par un courant constitué d'un mélange d'eau (8) et de vapeur d'eau (3).
EP10700226.3A 2009-01-27 2010-01-08 Station de dérivation avec un dispositif mélangeur pour mélanger de l'eau et de la vapeur d'eau Not-in-force EP2382033B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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 (3)

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
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
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

Publications (2)

Publication Number Publication Date
EP2382033A1 true EP2382033A1 (fr) 2011-11-02
EP2382033B1 EP2382033B1 (fr) 2013-12-18

Family

ID=40756880

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 Before (1)

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

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

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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
US3094171A (en) * 1958-03-24 1963-06-18 Gamewell Co Foam nozzle
US3872012A (en) * 1973-12-20 1975-03-18 Mc Donnell Douglas Corp Particulate separator
US4830790A (en) * 1987-11-04 1989-05-16 Co-Son Industries Foam generating nozzle
DE4022937A1 (de) * 1990-07-19 1992-01-23 Schwaebische Huettenwerke Gmbh Filter- oder katalysatorkoerper
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.
CA2081392A1 (fr) * 1992-10-26 1994-04-27 Toshiharu Fukai Generateur de bulles d'air
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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
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

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Also Published As

Publication number Publication date
CN102300628A (zh) 2011-12-28
EP2210657A1 (fr) 2010-07-28
EP2382033B1 (fr) 2013-12-18
US20110291307A1 (en) 2011-12-01
CN102300628B (zh) 2014-08-20
US8641019B2 (en) 2014-02-04
WO2010086199A1 (fr) 2010-08-05

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