EP1055450B1 - Rührwerk - Google Patents

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Publication number
EP1055450B1
EP1055450B1 EP00111186A EP00111186A EP1055450B1 EP 1055450 B1 EP1055450 B1 EP 1055450B1 EP 00111186 A EP00111186 A EP 00111186A EP 00111186 A EP00111186 A EP 00111186A EP 1055450 B1 EP1055450 B1 EP 1055450B1
Authority
EP
European Patent Office
Prior art keywords
gas
agitator
shaft
characteristic
hollow
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.)
Expired - Lifetime
Application number
EP00111186A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1055450A3 (de
EP1055450A2 (de
Inventor
Peter Forschner
Günter Greiner
Werner Himmelsbach
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.)
EKATO Ruehr und Mischtechnik GmbH
Original Assignee
EKATO Ruehr und Mischtechnik GmbH
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 EKATO Ruehr und Mischtechnik GmbH filed Critical EKATO Ruehr und Mischtechnik GmbH
Publication of EP1055450A2 publication Critical patent/EP1055450A2/de
Publication of EP1055450A3 publication Critical patent/EP1055450A3/de
Application granted granted Critical
Publication of EP1055450B1 publication Critical patent/EP1055450B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/71—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with propellers
    • 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
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
    • B01F23/2332—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements the stirrer rotating about a horizontal axis; Stirrers therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis

Definitions

  • the invention relates to an agitator for stirring liquids in a stirred tank, wherein the liquid is supplied with a gas, in particular for Suspendievon of solids and dispersion of gas in the liquid in flue gas desulphurisation plants, with a stirrer shaft and a stirring propeller sitting on it.
  • fumigation or gassing lances For the fumigation of absorbers of flue gas desulphurisation plants previously used fumigation or gassing lances. It refers to simple, horizontal pipes with holes or around vertical pipes through which the gas, usually air, is injected. High gas rates can be with such Pipes or lances can no longer be distributed efficiently.
  • US 3,400,918 discloses a wastewater aerator for distributing air therein in a wastewater tank wastewater.
  • the wastewater aerator is arranged above the surface of the waste water and comprises a motor, which is arranged for splash protection in a jacket, one from the engine rotationally driven at high speed and hollow inside Stirring shaft, the out of the jacket down and below the surface the sewage towers.
  • the upper open end of the hollow stirrer shaft is located in the mantle above the engine in a free space that is over one a cover of the shell arranged passage with the atmospheric air in Connection stands.
  • the protruding end of the stirrer shaft is closed, and in the vicinity thereof are rotationally fixed with the shaft and one behind the other a first Screw propellers, two diametrically extending away from the shaft and diametrically Opposite arranged ventilation pipes with open ends and a second screw propeller arranged.
  • a negative pressure is generated by the atmospheric air through the passage in the lid, the free space and the open top in the stirrer shaft and the ventilation tubes and through their open ends sucked into the wastewater and introduced into large air bubbles.
  • the Air bubbles are created by the jet generated by the first screw propeller taken to the second screw propeller and dispersed by the latter.
  • German Utility Model DE-U-92 01 820 is a gassing agitator proposed with a from above in a liquid submersible and by a motor driven core shaft; a diffuser and one with wing blades provided propellers, both at the submerged outer end of the Core shaft are attached; and a jacket tube surrounding the core shaft and from an upper, non-immersed area of the core shaft up to extending to the diffuser and surrounding the core shaft annular and at the top towards the atmosphere annular open mantle space on the outside limited.
  • Each blade of the propeller has a radially extending therethrough extending guide channel and a variety of at the bottom of the wing blade provided along the guide channel nozzles for blowing air.
  • the diffuser connects the jacket space with the guide channels in the wing blades.
  • the gassing unit When the gassing unit is driven in rotation, it forms a Flow that draws atmospheric air through the upper annular opening, axially through the shell space along the shaft, through the diffuser, the air channels and suck the nozzles into the liquid where they pass through the Wing leaves generated fluid flow is distributed and swirled.
  • EP 754 489 discloses an apparatus for dispersion of gas in a stirred tank contained liquid.
  • the device comprises a drive unit and an agitator driven therefrom with one having its outer end of massive agitator shaft immersed in the liquid above; several around the Agitator shaft around this rotatably mounted, L-shaped bent tubes; and several attached to the outer end of the stirrer shaft and in a radial Level extending blades.
  • the long leg of each L-shaped bent Pipe extends along the agitator shaft of a non-immersed Area to the outer, immersed end of the stirrer shaft, and the short Leg of each tube extends radially along a stirring blade on the respect the direction of rotation rear side (negative pressure side).
  • GB 2 052 278 discloses an agitator with a liquid submerged one Arm and an even further extending drive shaft.
  • the inside hollow drive shaft is splash-proof in the arm rotatably mounted.
  • Near its outer end projecting into the liquid the drive shaft is a screw propeller and on its pressure side a T-shaped, conventional ventilation means attached.
  • the T-shaped valve tion means comprises two diametrically mounted on the drive shaft and itself radially outwardly extending tubes with an air-permeable tube wall.
  • the Pipe wall is composed of individual annular lamellae Rubber passing through a pipe extending through the two outward extending tensioner rod are held together radially.
  • the invention is based on the object, the known stirrer so educate, that also higher gas rates efficiently in the liquid in the stirred tank can be distributed, and the introduced gas predispersed by the stirrer becomes.
  • a stirrer for stirring liquids indicated in a stirred tank wherein the liquid is supplied to a gas especially for suspending solids and dispersing Gas in the liquid at gas desulphurisation plants, which one inside agitator shaft protruding stirrer shaft, sitting on this stirrer shaft Stirring propeller and a gassing device for introducing the gas into the Includes stirred tank.
  • the stirrer shaft is hollow or (ii) the agitator includes a plurality of around the outer periphery of the agitating shaft arranged and connected to it and extending in its longitudinal direction Tubes or (iii) a non-rotatably connected to the stirring shaft, hollow Hub.
  • the gassing device is (i, ii) at the in the stirred tank protruding end of the stirring shaft or (iii) the projecting into the stirring container Attached end of the hollow hub and rotatably connected.
  • the agitator further, that the gassing in the form of a chamber containing the agitator shaft or hub (34) surrounds, is formed and with the interior (i) of the stirring shaft or (ii) the Or (iii) the hollow hub (34) communicating such that the gas through this interior and through the chamber into the stirred vessel insertable is.
  • the chamber of the gassing device can in cross section a triangular or rectangular shape.
  • the hollow stirrer shaft and the hollow hub are in the range of their container-side ends with transverse bores for introducing the gas into the chamber and the stirred tank Mistake.
  • the outlet openings of the chamber, through which the gas flows into the stirred tank on a diameter which is about 35 up to 75% of the diameter of the stirring propeller.
  • outlet openings of the chamber on the, referred to the direction of rotation of the gassing device, back, that is the Form the negative pressure side of the chamber are advantageous.
  • the axial Distance of the gassing to the stirring propeller expediently about 25% to 75% of the stirring propeller.
  • the outlet openings of the gassing device for introducing the gas into the Stirred vessels are preferably arranged on the pressure side of the stirring propeller
  • a stationary distribution head For the supply of the gas is in one embodiment advantageously a stationary distribution head intended.
  • the hub can only be located in the region of the inner end of the be formed solid agitator shaft, wherein the gas of the hollow hub via a can be supplied directly through the wall of the stirred tank tube.
  • FIG. 1 schematically shows an illustrative agitator 10 which is located inside a stirred container 12 is installed.
  • the stirred tank 12 may be the absorber of a flue gas desulphurisation plant.
  • the agitator 10 comprises a stirring shaft 14, which from the outside through the wall of the Stirred container 12 extends into the interior of the latter.
  • the longitudinal axis of the Stirrer shaft 14 extends in the installed position substantially horizontally or up to about 15 ° downwards.
  • the stirring shaft 14 can by a not shown external drive are rotated.
  • an axial conveyor in shape a propeller 16, which is rotatably connected to the stirring shaft 14 and the stirred material in the direction of the arrow P promotes.
  • the stirring shaft 14 has in the region of the distributor head 18 radial bores 22, through which enter the gas from the distributor head 18 into the interior of the stirring shaft 14 can.
  • seals 24 for example, lip seals, labyrinth seals or Gap seals, as well as between the stirring shaft 14 and the wall of the Stirred container 12.
  • the interior, i. the end of the stirring shaft 14 projecting into the stirring container is closed at the front, but it is in the Area of this inner end with transverse to its longitudinal axis extending in the Cylinder wall formed through holes 26 provided.
  • the gas is as shown in FIG. 4 schematically shows, from four radially extending tubes 30, which at their outer ends one each Having outlet opening 32 for the gas introduced into the stirred tank 12.
  • tubes 30 In Figure 4, four such tubes 30 are shown, but it can also be more or less of these tubes 30 may be provided.
  • the tubes 30 obliquely at their outer ends, for example at an angle of 45 ° to their Longitudinal axis, cut off, whereby the outlet openings 32 are formed.
  • the tubes 30 may also be closed at their ends and the Outlet openings 30 can be formed in the cylinder wall of the respective tube be, with only one, but also several, outlet openings are provided per tube can.
  • the outlet openings 32 of the tubes 30 are, based on the direction of rotation R of Begasungs worn 28, on the back of the tubes 30, that is on the negative pressure side the gas channels or the tubes 30, whereby a back pressure before the Pipes corresponding negative pressure is generated, which is a possible pressure loss in the gas supply reduced or the small liquid overlaps the outlet 32 can also be used for self-priming (without external fan).
  • the axial distance A between the median plane of the propeller 16 and the median plane the gassing device 28 is expediently about 25 to 75% the propeller diameter, so that any repelling of gas effect of the axial conveyor, that is, the propeller 16, can not affect.
  • the outlet openings 32 are located on a diameter which is larger than that Diameter of the stirring shaft 14 and the hub 34 ( Figure 2), preferably the Diameter of the circle on which the centers of the outlet openings 32 lie, approximately 35% to 75% of the propeller diameter.
  • FIG. 5 shows an embodiment according to the invention with a gassing device 28.
  • This gassing device has the shape of a triangular, for example Chamber 48, which, as Figure 5 shows, the container-side end of the hollow stirrer shaft 14 and the massive agitator shaft 15 of Figure 2 (see below) surrounds the hollow hub 34 and the rotationally fixed to the shaft 14 and the Hub 34 is connected.
  • the axial width of the chamber 48 in the direction of the longitudinal axis of the agitator shaft 14 and the hub 34 is chosen so that the chamber 48 at least the radial bores 26 in the agitator shaft 14 and the radial bores 38 in the hub 34 covered. Conveniently, however, the width of the chamber 48 is slightly larger than that Diameter of these holes 26 and 38th
  • the chamber 48 has in the illustrated embodiment, three outlet ports 32, through which the supplied via the shaft 14 or the hub 34 and by the Holes 26 and 38 in the chamber 48 entering gas in the stirred tank 12th blown.
  • the outlet openings can extend over the entire axial width extend the chamber 48.
  • the chamber 48 according to the invention according to FIG the outlet openings 32 relative to the direction of rotation R of the gassing device 28 on the back of the chamber 48, whereby the already described above Negative pressure is generated.
  • FIG. 2 shows a further illustrative embodiment of the agitator 10.
  • the stationary, outside of the stirred tank 12th arranged distributor head 18 coupled to the here massive agitator shaft 15, wherein the stirring shaft 15 is passed through the distributor head 18 and between the the latter and the stirring shaft 15 seals 24 are installed.
  • the stirring shaft 15 sits the axial conveyor in the form of the propeller 16.
  • a hollow hub 34th rotatably connected, in which of the pipe feed 20 forth and an annular space 40 between the agitator shaft 15 and the distributor head 18, the gas introduced is.
  • the hub 34 is concentric with the agitator shaft 15 and its outer end 42 overlaps the inner end 44 of the distributor head 18, in this embodiment slightly protrudes through the wall of the stirred tank 12 into the latter.
  • the inner end 46 of the hub 34 is closed at the front, but in the area of this inner end 46 is the hollow hub 34 with radial, in its cylindrical wall trained bores 38 equipped.
  • the propeller 16 conveys the liquid in Direction of the arrow P.
  • the Fumigation device 28 is rotatable with the Stirring shaft 14 and the hub 34 is connected and thus rotates together with the Stirring shaft 14 and the hub 34 and the propeller 16 as a unit.
  • the gas by means of a not shown Blower via the pipe feed 20, the annular space 40 between the agitator shaft 15th and the distributor head 18, the hollow hub 34 and the radial bores 38 in the the latter, introduced into the tubes 30 or erfindungsg ⁇ owned in the chamber 48 of the gassing device 28 and through the outlet openings 32 in the liquid in the stirred tank 12th blown.
  • the invention Begasungs issued 28 which has the axial distance A from the propeller 16 is located relative to the peripheral wall of the stirred tank inwardly from the propeller 16 and on the print side of the latter.
  • the gas is thus from the outside through the hollow stirrer shaft 14 and the hollow Hub 34 introduced into the stirred tank 12 and by means of the gassing 28th on the pressure side of the propeller 16 of the liquid in the stirred tank 12 fed.
  • the propeller 16 generates a sufficiently strong jet of liquid to simultaneously Suspend solids in the liquid and add the gas in the liquid disperse.
  • Figure 3 shows a schematic side view still another illustrative Embodiment of the Agitator.
  • the stirring shaft 15 is solid as in the embodiment of Figure 2.
  • the inner end face of the distributor head 18 is closed by a wall 58, which axially overlaps the inner end 44 of the distributor head 18, wherein between the wall 58 and the inner end 44 of the distributor head 18 a suitable Seal 24 is installed.
  • the end wall 58 is rotatably connected to the stirring shaft 15.
  • the stirring shaft 15 On the outer circumference of the stirring shaft 15 are several, for example four, tubes 52nd arranged and fixedly connected to the stirring shaft 15, which is practically parallel to Agitator 15 extend and the outer end 60 through the wall 58 in protrude the annulus 40 of the stationary distribution head 18. (Between the the latter and the shaft 15 is also a suitable seal 24 is arranged.)
  • the tubes 52 are in the region of the inner, container-side end 54 of the stirring shaft 15 radially outward (substantially perpendicular to the longitudinal axis of the shaft 15) bent and thus form radial pipe sections 56, at the free ends of the Outlet openings 32 formed for the introduction of the gas in the stirred tank 12 are.
  • the gassing device may also be used 28 are provided for the inventive introduction of the gas in the Stirring container 12.
  • FIG. 6 shows yet another illustrative embodiment of the agitator.
  • the hub 34 is only in the region of the inner end 54 of the solid stirring shaft 15 is formed and it is suitably for example by welding or by means of screws with this inner end 54 of the stirring shaft 15 connected.
  • the container-side end 46 of the hollow hub 34 is open and in this end 46th opens the tube feed 20, wherein between the rotating hub 34 and the fixed tube feed 20 a suitable seal 24, for example, a lip seal or a labyrinth seal or the like is installed.
  • the tube 20 from the outside through the wall of the stirred tank 12th passed.
  • the tube 20 then expediently extends radially into the stirred tank 12 in, is then bent such that its end portion 21 again directed to the outside of the wall of the stirred container and thus from the inside into the hollow hub 34 opens.
  • the hub 34 is provided in the illustrative example of Figure 6 with the tubes 30 ( Figure 4). However, according to the invention it is with the gassing device 28 already described provided in turn from the chamber 48 (FIG 5) is formed.
  • the tubes 30, 52 and 56 may have a circular cross section, rectangular cross section or have any other suitable cross-section.
  • the inventive chamber 48 of FIG 5 can also be rectangular in cross-section or another have suitable cross-section.
  • the distributor head 18 can also be integrated into the wall of the agitator 12 or completely be installed inside the stirred tank 12. In this case, the pipe feed 20 passed through the wall of the stirred tank 12 and to the distributor head 18 connected.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Accessories For Mixers (AREA)
  • Treating Waste Gases (AREA)
  • Cleaning In General (AREA)
EP00111186A 1999-05-27 2000-05-24 Rührwerk Expired - Lifetime EP1055450B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29909312U DE29909312U1 (de) 1999-05-27 1999-05-27 Rührwerk
DE29909312U 1999-05-27

Publications (3)

Publication Number Publication Date
EP1055450A2 EP1055450A2 (de) 2000-11-29
EP1055450A3 EP1055450A3 (de) 2002-06-19
EP1055450B1 true EP1055450B1 (de) 2005-07-27

Family

ID=8074047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00111186A Expired - Lifetime EP1055450B1 (de) 1999-05-27 2000-05-24 Rührwerk

Country Status (6)

Country Link
US (1) US6439756B1 (tr)
EP (1) EP1055450B1 (tr)
JP (1) JP4828013B2 (tr)
KR (1) KR100472620B1 (tr)
AT (1) ATE300350T1 (tr)
DE (2) DE29909312U1 (tr)

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DE102008061258A1 (de) * 2008-12-10 2010-06-24 Hitachi Power Europe Gmbh Verfahren zur CO2-Abtrennung aus Rauchgas und Absorber
DE102010004206A1 (de) 2009-06-08 2010-12-09 EKATO Rühr- und Mischtechnik GmbH Rühranrodnung

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CN104046562B (zh) * 2014-06-11 2016-05-25 苏州市金翔钛设备有限公司 一种搅拌反应器
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KR102052278B1 (ko) * 2018-10-01 2019-12-04 순천향대학교 산학협력단 평발 교정 운동 시스템 및 이를 이용한 평발 교정 운동 방법

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008061258A1 (de) * 2008-12-10 2010-06-24 Hitachi Power Europe Gmbh Verfahren zur CO2-Abtrennung aus Rauchgas und Absorber
DE102010004206A1 (de) 2009-06-08 2010-12-09 EKATO Rühr- und Mischtechnik GmbH Rühranrodnung

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JP4828013B2 (ja) 2011-11-30
JP2001000851A (ja) 2001-01-09
ATE300350T1 (de) 2005-08-15
EP1055450A3 (de) 2002-06-19
DE29909312U1 (de) 1999-08-12
KR20010049418A (ko) 2001-06-15
KR100472620B1 (ko) 2005-03-08
EP1055450A2 (de) 2000-11-29
DE50010802D1 (de) 2005-09-01
US6439756B1 (en) 2002-08-27

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