EP2640499B1 - Inline-dispergator und pulvermischverfahren - Google Patents

Inline-dispergator und pulvermischverfahren Download PDF

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Publication number
EP2640499B1
EP2640499B1 EP11796779.4A EP11796779A EP2640499B1 EP 2640499 B1 EP2640499 B1 EP 2640499B1 EP 11796779 A EP11796779 A EP 11796779A EP 2640499 B1 EP2640499 B1 EP 2640499B1
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EP
European Patent Office
Prior art keywords
mixing
gas
flow
outlet
pneumatic
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EP11796779.4A
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English (en)
French (fr)
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EP2640499A1 (de
Inventor
Geoff Emms
Alon Vaisman
Bernd Looser
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Malvern Panalytical Ltd
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Malvern Instruments Ltd
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    • 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
    • B01F23/60—Mixing solids with solids
    • 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
    • B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
    • B01F25/27—Mixing by jetting components into a conduit for agitating its contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F33/00—Other mixers; Mixing plants; Combinations of mixers
    • B01F33/40—Mixers using gas or liquid agitation, e.g. with air supply tubes
    • B01F33/404—Mixers using gas or liquid agitation, e.g. with air supply tubes for mixing material moving continuously therethrough, e.g. using impinging jets

Definitions

  • the invention relates to in-line powder dispersion apparatus, and particularly to dispersers that can be used to disperse particulate materials in an industrial process.
  • WO98/56696 discloses a device in accordance with the preamble of claim 1 for transporting bulk granular or powdery material through a line by introducing a pressurised gas into the line.
  • the pressurised gas is introduced via bores at an angle to the direction of flow.
  • the velocity of the material is measured near the location at which pressurised gas is introduced.
  • US2005/0201199 discloses a material transfer device in which pressurised air is used to transport material along a pipe.
  • the pressurised air is introduced via an air inlet manifold encircling the pipe.
  • EP0925827 discloses a cyclonic mixer comprising a pair of concentric tubes.
  • the outer tube is closed at either end, and has a plurality of holes at angles through to the inner tube. Air is admitted to the outer tube to create a swirling motion in the inner mixing tube.
  • the inlet of the tubes is fed dry particles intended to be mixed.
  • US5722802 discloses a powder delivery apparatus for use in a paint supply system.
  • a flexible inner porous hose is provided.
  • a flexible outer hose surrounds the inner hose. Air is forced radially through the pores in the wall of the inner hose, which promotes atomisation of powder being transported in the inner tube.
  • JP 63 262338 discloses a coanda spiral flow controller with sealing members that partially seal an annular slit, as required.
  • the sealing members are moveable by means of screws to adjust the input speed of a pressurised fluid from the annular slit.
  • an in-line powder dispersion apparatus according to claim 1.
  • Such a dispersion apparatus can be connected directly into a process line via the first and second line apertures, so as to form a continuation of the process line. Aggregation of materials in the process line may be discouraged or reduced by injecting mixing gas into the mixing chamber through the first gas injection port(s).
  • the apparatus may further include a mixing gas source having a mixing gas outlet for pneumatic connection to the gas injection port
  • the first and second line apertures may be the same, and may be the same as an aperture of the mixing chamber.
  • An injection direction of the mixing gas outlet of the first injection port is placed at an angle with respect to an expected flow direction through the mixing chamber, such that a first component of the injection direction lies in the downstream direction and a second component lies in an inward, radial direction with respect to the conduit.
  • An injection direction of the or one of the gas inlet ports may be 75 degrees from a flow direction in the mixing chamber.
  • the apparatus may include a plurality of first gas injection ports, and may include at least four first gas injection ports distributed around a periphery of the mixing chamber. Each gas injection port may have an inlet responsive to a mixing gas outlet of a mixing gas source and a mixing outlet that opens into the mixing chamber.
  • the gas injection ports may be defined by at least one segmented disperser contact face.
  • the apparatus may include a plurality of gas injection ports, and may in particular include first and second gas injection ports, each having an inlet responsive to a mixing gas outlet of a mixing gas source and a mixing outlet that opens into the mixing chamber.
  • the first and second gas injection ports may comprise part of a multipart aperture that at least substantially surrounds a circumference of the mixing chamber.
  • the first and second gas injection ports may be separated by bosses.
  • the apparatus may further include a plenum in a pneumatic path between a mixing gas outlet of a mixing gas source and the gas injection ports to evenly distribute a flow of gas from the mixing gas source between the first and second gas injection ports. At least four gas injection ports may be distributed around a periphery of the mixing chamber, each being responsive to the mixing gas outlet of the mixing gas source via the plenum.
  • the plenum may be defined between an inner conduit section and an outer conduit section that each surround a pneumatic flow path that passes from the inlet to the outlet of the apparatus.
  • the mixing chamber may comprise the pneumatic flow path.
  • the conduit sections may be substantially cylindrical.
  • the apparatus may comprise the four gas injection ports, which may be separated by bosses facing in a direction parallel to the flow path from an end face or area of a inner, possibly cylindrical, conduit section and butting against another, possibly cylindrical, conduit section that surrounds the pneumatic flow path.
  • the first gas injection port may at least substantially surround a circumference of the mixing chamber.
  • the different directions may comprise different radial directions.
  • the different directions may each comprise a component in the direction of the pneumatic flow
  • an illustrative in-line disperser 10 includes a pneumatic inlet 102 having a first line aperture, a mixing chamber 106 placed pneumatically downstream of the pneumatic inlet, and a pneumatic outlet 104 placed pneumatically downstream of the mixing chamber.
  • the disperser includes a body that spans from a pneumatic inlet at an upstream end 12 to a pneumatic outlet at a downstream end 14.
  • a mixing chamber, in the form of a conduit 20, is defined between the ends.
  • the disperser also includes at least one, and in this example four, gas injection ports 108.
  • Each gas injection port includes an inlet responsive to a mixing gas outlet of a mixing gas source, and a mixing outlet that opens in to the mixing chamber 106.
  • the disperser may further include a mixing gas source having a mixing gas outlet, although this is not shown in the figures.
  • the gas injection ports are arranged to direct mixing gas into a fluid flowing in the mixing chamber.
  • the gas injection ports are distributed at different radial positions around the mixing chamber, and are, in this example, angled so as to direct gas into the mixing chamber in a direction that has a first generally radial component (with respect to the mixing chamber), and a second generally axial component in a downstream direction (with respect to the expected or intended direction of the pneumatic flow through the mixing chamber).
  • the injection ports may be in connection with a mixing gas source via a shared manifold or plenum, an example of which is described in more detail below. However, it will be appreciated that each gas injection port might have an individual mixing gas supply, if required.
  • the body of the disperser is made of an upstream portion 16 and a downstream portion 18 that are connected by a sleeve 19 in such a way as to define a gas injection path between the conduit 20 (via the gas injection ports 108) and one or more gas input ports 22, which can be connected to a gas source, such as a bottled gas source.
  • a gas source such as a bottled gas source.
  • this type of two-part construction is the currently preferred approach to defining the gas injection path, one of ordinary skill in the art would recognize that other approaches, such as casting or machining a single part, could also be employed.
  • the conduit is shown with a continuous diameter along a flow axis of the disperser, other geometries could also be devised.
  • the upstream body portion 16 can be made up of two segments of successively smaller outer diameters 16A and 168, where the outer diameter of segment 16B is smaller than the outer diameter of segment 16A, and segment 16B is downstream of segment 16A.
  • the downstream body portion 18 can be made up of two segments of successively smaller inner diameters 18A and 18B, where the inner diameter of segment 18A is larger than the inner diameter of segment 18B, and segment 18A is upstream of segment 18B.
  • the inner diameter of downstream segment 18A is larger than the outer diameter of upstream segment 16B, so that the two segments are able to overlap, defining a space between them through which gas can flow.
  • the disperser segments, 16, 18 make face to face contact at a plurality of discrete points, establishing a plurality of gaps - the injection ports - through which a mixing gas, such as air, can flow.
  • bosses 24 are provided at the downstream end of the upstream portion 16, which is part of its inner segment or layer 16B, in particular an end face of segment 16B. These bosses extend along the flow direction and each culminate in a raised contact surface to form a segmented disperser contact face, proving a 'segmented' gap through which the mixing gas can flow. In one embodiment, there are four bosses that are each 0.5 mm high. This dimension was chosen empirically based on gas consumption, but other dimensions may be more suitable and an optimal exact diameter is likely to be application-specific.
  • an outer sleeve 19 is clamped in place with gaskets to align and draw the upstream body portion 16 against the downstream body portion 18.
  • the gaskets include an internal groove shaped to receive protrusions extending from both the sleeve and body portions 16 and 18, so holding the portions securely in place.
  • the contact surfaces of the bosses 24 on the innermost layer 16B press against the upstream end of the innermost layer 18B of the downstream body portion.
  • the upstream body portion and the downstream body portion provide a structural framework for the gas injection path.
  • the gaskets are 3,81 cm ( 1-1/2 ) inch tri-clamp gaskets, which provide axial pressure to ensure that the disperser segments are kept in face to face contact with each other.
  • the beginning of the gas injection path is defined by a gap 30 between the downstream end of the outer layer 16A of the upstream body portion 16 and the upstream end of the outer layer 18A of the downstream body portion 18.
  • a second part of the gas injection path is defined by an annular volume 32 defined between the radially outward-facing wall of the inner layer 16B of the upstream body portion and the radially inward facing wall of the outer layer 18A of the inner wall of the downstream body portion.
  • This annular volume 30 acts as a plenum to evenly distribute a flow of gas from the two gas input ports 22.
  • the final part of the injection path is defined by a ring of curved gaps 34 between the bosses 24, which gaps define the gas injection ports 108.
  • the end surfaces of the inner layers of the upstream and downstream body portions can be angled to direct the gas flow into a mixing area 36 of the conduit 20 at selected angle. That is, the end face of the bosses may be at an angle to the radius of the mixing chamber, and the end face of the inner downstream segment 18B may also be at an angle to the radius, so that the gas injection ports are not normal to the flow direction, but instead have a component in the flow direction. In one embodiment, this angle is a relatively steep 75° with respect to the flow direction (i.e., the introduction is 15° closer to the flow direction than a right angle introduction would be). As a result, vacuum created by the disperser is gentle and should not interfere with operation of upstream equipment.
  • the in-line disperser is positioned between an upstream source of particles, such as a milling machine, and a downstream measuring device, such as one of the Insitec laser diffraction instruments available from Malvern Instruments, which is used to measure their characteristics.
  • a downstream measuring device such as one of the Insitec laser diffraction instruments available from Malvern Instruments, which is used to measure their characteristics.
  • the pressurized injected gas creates turbulence in the mixing area and breaks up aggregated particles and/or prevents aggregation that might otherwise take place.
  • the measuring device receives the pneumatically conveyed particulate flow and monitors the size of the particles it contains.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)

Claims (15)

  1. Eine Vorrichtung bestehend aus:
    einem Inline-Pulverdispergator (10), bestehend aus:
    einem Pneumatikeinlass (102) mit einer ersten Anschlussöffnung,
    einer Mischkammer (106), die pneumatisch nach dem Pneumatikeinlass (102) platziert ist,
    mindestens einem ersten Gas-Injektionsbrenner (108) mit einem Einlass (22), der von einem Mischgasauslass einer Mischgasquelle und einem Mischauslass abhängig ist, der sich in die Mischkammer öffnet, und
    einem Pneumatikauslass (104), der pneumatisch nach der Mischkammer (106) platziert ist und eine zweite Anschlussöffnung aufweist;
    dadurch gekennzeichnet, dass die Vorrichtung darüberhinaus Folgendes umfasst:
    ein nachgeordnetes Messgerät, das so angeordnet ist, dass es einen pneumatisch beförderten Teilchenfluss vom Pneumatikauslass (104) aufnehmen kann, und so gestaltet ist, dass es die Größe der Teilchen im Teilchenfluss überwachen kann;
    wobei der Pulverdispergator (10) die zusammengeballten Teilchen aufbrechen kann und/oder die Zusammenballung der Teilchen durch die Erzeugung einer Verwirbelung im Teilchenfluss in der Mischkammer verhindern kann, wenn druckbeaufschlagtes Mischgas durch den Gas-Injektionsbrenner (108) injiziert wird, und
    wobei eine Injektionsrichtung des Mischauslasses mindestens des ersten Injektionsbrenners (108) in einem Winkel zum Durchfluss mit einer ersten Komponente in ablaufseitiger Richtung und einer zweiten größeren Komponente in einer nach innen verlaufenden radialen Richtung zur Leitung platziert ist.
  2. Die Vorrichtung in Anspruch 1 darüberhinaus bestehend aus einer Mischgasquelle mit einem Mischgasauslass.
  3. Die Vorrichtung in Anspruch 1 oder Anspruch 2, wobei die erste und zweite Anschlussöffnung gleich groß sind und dieselbe Form haben, und gleich groß sind und die gleiche Form haben wie eine Öffnung in der Mischkammer (106).
  4. Die Vorrichtung in einem der Ansprüche 1 bis 3, wobei die Injektionsrichtung des Mischauslasses des ersten Injektionsbrenners bei 75 Grad von einer Flussrichtung in der Mischkammer (106) liegt.
  5. Die Vorrichtung eines der Ansprüche 1 bis 4, die darüberhinaus einen zweiten Gas-Injektionsbrenner (108) mit einem Einlass einschließt, der von einem Mischgasauslass einer Mischgasquelle und einem Mischauslass abhängig ist, der sich in die Mischkammer (106) öffnet.
  6. Die Vorrichtung in Anspruch 5, wobei der erste und der zweite Gas-Injektionsbrenner (108) Teil einer mehrteiligen Öffnung sind, die mindestens im Wesentlichen einen Umfang der Mischkammer (106) umgibt.
  7. Die Vorrichtung in Anspruch 5 oder Anspruch 6, wobei der erste und der zweite Gas-Injektionsbrenner (108) durch Naben (24) getrennt sind.
  8. Die Vorrichtung in einem der Ansprüche 5 bis 7 darüberhinaus bestehend aus einem Plenum (30) auf einem Pneumatikpfad zwischen dem Mischgasauslass der Mischgasquelle und dem ersten und zweiten Gas-Injektionsbrenner (108), um einen Gasfluss aus der Mischgasquelle zwischen dem ersten und zweiten Gas-Injektionsbrenner (108) gleichmäßig zu verteilen.
  9. Die Vorrichtung in Anspruch 8, wobei mindestens vier erste Gas-Injektionsbrenner (108) um einen Umfang der Mischkammer (106) verteilt sind und jeweils vom Mischgasauslass der Mischgasquelle über das Plenum (30) abhängig sind.
  10. Die Vorrichtung in Anspruch 8 oder Anspruch 9, wobei das Plenum (30) zwischen einem inneren zylindrischen Leitungsabschnitt und einem äußeren zylindrischen Leitungsabschnitt definiert ist, die jeweils einen Pneumatik-Durchflussweg umgeben, der vom Einlass zum Auslass des Dispergators verläuft.
  11. Die Vorrichtung in Anspruch 8 oder Anspruch 9 oder Anspruch 10, wobei die vier Gas-Injektionsbrenner (108) durch Naben (24) getrennt sind, die in eine Richtung parallel zum Durchflussweg von einem kreisförmigen Endbereich des inneren zylindrischen Leitungsabschnitts zeigen und gegen einen anderen zylindrischen Leitungsabschnitt stoßen, der den Pneumatikstrom umgibt.
  12. Die Vorrichtung in einem der vorhergehenden Ansprüche, wobei der erste Gas-Injektionsbrenner (108) mindestens im Wesentlichen einen Umfang der Mischkammer (106) umgibt.
  13. Die Vorrichtung in einem der vorhergehenden Ansprüche, wobei mindestens vier erste Gas-Injektionsbrenner (108) um einen Umfang der Mischkammer (106) verteilt sind und jeweils einen Einlass zu einem Mischgasauslass einer Mischgasquelle und einen Mischauslass aufweisen, der sich in die Mischkammer (106) öffnet.
  14. Die Vorrichtung in Anspruch 13, wobei die Gas-Injektionsbrenner (108) durch mindestens eine segmentierte Dispergator-Kontaktfläche definiert sind.
  15. Ein Inline-Pulvermischverfahren, bestehend aus:
    der Aufnahme eines Pneumatikstromes, der Schwebeteilchen enthält, in eine Vorrichtung gemäß Anspruch 1,
    Erzeugung einer Verwirbelung im aufgenommenen Pneumatikstrom durch Injektion eines Mischgases aus einer Vielzahl unterschiedlicher Richtungen im aufgenommenen Pneumatikstrom, um eine Sprühströmung durch Aufbrechen der zusammengeballten Teilchen zu erzeugen und/oder die Verhinderung der Zusammenballung der Teilchen, und
    Weiterleitung der Sprühströmung an ein nachgeordnetes Messgerät, und
    Verwendung des Gerätes zur Überwachung der Größe der Teilchen in der Sprühströmung; wobei die Injektionsrichtungen eines Mischgases in einem Winkel im Verhältnis zum Pneumatikstrom mit einer ersten Komponente in ablaufseitiger Richtung und einer zweiten größeren Komponente in einer nach innen verlaufenden radialen Richtung im Verhältnis zur Leitung platziert sind.
EP11796779.4A 2010-11-18 2011-11-18 Inline-dispergator und pulvermischverfahren Active EP2640499B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US41518210P 2010-11-18 2010-11-18
US41980310P 2010-12-03 2010-12-03
PCT/GB2011/052254 WO2012066343A1 (en) 2010-11-18 2011-11-18 In-line disperser and powder mixing method

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EP2640499A1 EP2640499A1 (de) 2013-09-25
EP2640499B1 true EP2640499B1 (de) 2015-09-09

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108613904A (zh) * 2018-06-29 2018-10-02 米亚索乐装备集成（福建）有限公司 粒径检测装置及雾化制粉系统
EP3873672A4 (de) 2018-11-02 2022-08-10 GCP Applied Technologies Inc. Zementherstellung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2506107B2 (ja) 1987-04-20 1996-06-12 住友石炭鉱業株式会社 コアンダスパイラルフロ−制御装置
US5722802A (en) 1995-06-09 1998-03-03 Low Emission Paint Consortium Powder delivery apparatus
NL1006299C2 (nl) 1997-06-12 1998-12-15 Joris Julius Josephus Van Eyck Werkwijze en inrichting voor het transporteren van bulk-, korrel- of poedervormig materiaal.
US6074085A (en) 1997-12-20 2000-06-13 Usbi Co. Cyclonic mixer
EP1304304B1 (de) 2001-10-05 2009-07-22 Vervant Limited Stoffübergabevorrichtung, insbesondere für Mischgeräte

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WO2012066343A1 (en) 2012-05-24

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