EP1622706B1 - Mischvorrichtung und Mischverfahren das diese Vorrichtung verwendet - Google Patents

Mischvorrichtung und Mischverfahren das diese Vorrichtung verwendet Download PDF

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Publication number
EP1622706B1
EP1622706B1 EP04725681A EP04725681A EP1622706B1 EP 1622706 B1 EP1622706 B1 EP 1622706B1 EP 04725681 A EP04725681 A EP 04725681A EP 04725681 A EP04725681 A EP 04725681A EP 1622706 B1 EP1622706 B1 EP 1622706B1
Authority
EP
European Patent Office
Prior art keywords
shaft
angle
blades
incidence
diameter
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 - Fee Related
Application number
EP04725681A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1622706A1 (de
Inventor
Hans-Jürgen WEISS
Udo Zentner
Burghard Neumann
Jörg SCHMALFELD
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.)
Lurgi Lentjes AG
Original Assignee
Lurgi Lentjes 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 Lurgi Lentjes AG filed Critical Lurgi Lentjes AG
Publication of EP1622706A1 publication Critical patent/EP1622706A1/de
Application granted granted Critical
Publication of EP1622706B1 publication Critical patent/EP1622706B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
    • B01F27/702—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with intermeshing paddles

Definitions

  • the invention relates to a mixing device and an associated mixing method for use as a continuously operating reactor.
  • mixing devices of this type consist of at least two horizontally intermeshing screws which are built according to the requirements of different length and diameter.
  • the mixing apparatus is varied in terms of solids residence time, reactor temperature, or system pressure.
  • DE-B-1189368 describes a conching machine with a single or double-cylinder trough arranged horizontally, in which main shafts provided in the cylinder axis (s) with axial thrust vanes are mounted.
  • main shafts provided in the cylinder axis (s) with axial thrust vanes are mounted.
  • at least two cylindrical protrusions are provided on the two longitudinal sides of the trough on the trough length parallel to the trough axis, in the axis of which one with the axial thrust vanes offset by 90 ° radial lifting blades provided side shaft is mounted, which on the one hand reaching up to the inner wall of the bulge, and on the other engaging in the rotation of the lifting blades of the main shaft, arranged between the radial lifting blades and the side shaft wing sets.
  • the side shaft is driven at a higher speed than the main shaft and in opposite directions to this.
  • DE-B-1255098 describes an apparatus for the thermal isomerization or disproportionation of alkali metal salts of benzene carboxylic acids, which consists of a reactor vessel provided with an inlet and outlet in the form of at least two parallel, intersecting cylinders, the cylinders each with a are provided concentrically extending shaft and these waves are provided with a variety of helical staircase axially separated by spacers stirring blades, wherein the wings are in the form of elongated, mutually offset by 30 ° plates whose tip circles those of the stirring blades of adjacent waves. overlap.
  • DE-A-19724074 and DE-A-19959587 describe a process for working up residual oil, in which the residue oil to be processed is introduced into the mixing plant of hot heat transfer coke and through a further conduit.
  • the heat transfer coke has temperatures in the range of 500 ° to 700 ° C and is mixed with the residual oil by at least two horizontal intermeshing screws so that a uniformly thick oil film is formed on the coke particles. This is then heated very rapidly to reaction temperature and reacts to form gases, oil vapors and coke. Gases and vapors leave the mixer after a short dwell time of 1 to 10 seconds through a vent channel upwards.
  • the coke-containing solid mixture which has passed through the mixer and has arrived at the outlet is withdrawn for further processing down into a buffer tank for post-degassing.
  • mixers of this type is trying to achieve the same residence time as possible of all solid particles, ie plug flow. That is, the particles that are near the shaft are transported at the same axial velocity as the particles that are on the outer circumference of the screw. At the same time, an attempt is made to adjust the residence time so that the liquid feed at the end of the mixer is completely converted into gases, vapors and coke. Due to the speed profile between conventional shafts and housing wall and the associated undesired axial mixing, the particles in these mixers have different residence times in the mixing section.
  • the residence time can be varied by adjusting the reactor length, the shaft speed or the pitch of the screws.
  • the present invention seeks to improve the previous mixing device such that at a given reactor length, the residence time is increased and that the material to be processed is transported regardless of its radial distance from the axis of rotation with the same speed as possible.
  • each shaft at least two opposite rows of blades are arranged and each row of blades from 2 to 20 individual blades and that the blades at an angle ⁇ to the longitudinal axis of the shaft on the Shaft are fastened, wherein the blades are curved in itself, so that the blades at the attachment point on the shaft have the angle of attack ⁇ and the outer diameter of the angle of attack ⁇ .
  • the axial velocity of the particles to be mixed over the entire reactor cross-section can be made uniform.
  • the angle of attack ⁇ at the outer diameter D A of the blades is kept smaller than the hitherto customary value of approximately 2 ⁇ ⁇ , the axial flow velocity becomes more uniform and, in the ideal case, approaches a plug flow. This results in a narrower residence time distribution.
  • the axial velocity of the particles to be mixed at the outer diameter D A decreases in relation to the axial velocity at the diameter D W of the shaft.
  • the same axial velocity is achieved over the entire reactor cross-section, if the angle of attack ⁇ on the outer diameter D A is half as large , as the angle of attack ⁇ at the diameter D W of the shaft.
  • the mixer (1) of Figure 1 is passed through the line (2), e.g. hot heat transfer coke and through the line (3) to be processed residue oil.
  • the mixer (1) has in the present case at least two horizontal, intermeshing screws, which mixes the introduced materials and transported to the outlet channel (8). Gases and vapors can leave the mixing device via the discharge channel (4) for condensation (5). Separate gases from the condensation (5) through the line (6) and product oil from the line (7).
  • the coke-containing solid mixture, which has passed through the mixing device (1) is passed through the outlet channel (8) to a container (9). From this container (9), the dried coke can be withdrawn via line (10) and recycled to the process.
  • the mixing device can of course also be used for the treatment of e.g. Bitumen, plastics, coal, peat or biomass, which may change the overall plant configuration.
  • Fig. 2 shows a sectional view of a mixing device (1) according to the prior art.
  • two intermeshing shafts (11, 14) are designed as hollow shafts which rotate in the same direction.
  • Each shaft (11, 14) has two screws (12, 13, 15, 16) which extends uninterrupted over the entire length of the shaft.
  • the two screws of a shaft are arranged offset by 180 °.
  • Fig. 3 shows one of at least two used shafts according to the invention.
  • a plurality of individual blades (12a, 12b, 12c, ... 12m) arranged in a helical line one behind the other.
  • a first Row of individual blades (12a, 12b, 12c, ... 12m) is on the shaft (11) associated with a second row of individual blades (13a, 13b, 13c, ... 13m) offset by 180 °.
  • each row of blades consists of 12 individual blades.
  • any uniform or uneven arrangement of the blades is possible, in which the blades (12a to 12m, 13a to 13m) lined up around the shaft (11) can be arranged and in which a smooth rolling of the waves ( 11, 14) to each other is possible.
  • the number of blades can be varied depending on the reactor length, the diameter ratios of shaft to blade and the associated blade curvatures.
  • the viscosity or the particle size of the media to be mixed has an influence, since the distance of the blades from one another can influence the mixing-in time.
  • a single row or a multi-row arrangement of the blades is possible.
  • Fig. 4 is a plan view of the left end side of the shaft of Fig. 3 is shown.
  • the diameter D W is the diameter of the shaft (11) at the attachment point of the blades and the diameter D A is the outer diameter of the shaft (11) on the blades.
  • FIG. 5 shows the enlarged detail "A" from FIG. 3 with the angles of attack of a single blade (12a).
  • the angle ⁇ denotes the angle of attack of the blade on the shaft.
  • the angle ⁇ is the diameter D W , Fig. 4 assigned.
  • the axial velocity at the outer diameter D A decreases to approximately half the original value.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP04725681A 2003-05-13 2004-04-05 Mischvorrichtung und Mischverfahren das diese Vorrichtung verwendet Expired - Fee Related EP1622706B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10321350A DE10321350B4 (de) 2003-05-13 2003-05-13 Mischvorrichtung
PCT/EP2004/003578 WO2004101126A1 (de) 2003-05-13 2004-04-05 Mischvorrichtung

Publications (2)

Publication Number Publication Date
EP1622706A1 EP1622706A1 (de) 2006-02-08
EP1622706B1 true EP1622706B1 (de) 2007-01-24

Family

ID=33440750

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04725681A Expired - Fee Related EP1622706B1 (de) 2003-05-13 2004-04-05 Mischvorrichtung und Mischverfahren das diese Vorrichtung verwendet

Country Status (10)

Country Link
US (1) US7677788B2 (es)
EP (1) EP1622706B1 (es)
JP (1) JP4708348B2 (es)
AT (1) ATE352369T1 (es)
AU (1) AU2004238009B2 (es)
CA (1) CA2529581C (es)
DE (2) DE10321350B4 (es)
ES (1) ES2281792T3 (es)
MX (1) MXPA05012173A (es)
WO (1) WO2004101126A1 (es)

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DE60335037D1 (de) 2003-03-14 2010-12-30 Depuy Spine Inc Hydraulische vorrichtung zur knochenzementeinspritzung bei perkutaner vertebroplastie
US8066713B2 (en) 2003-03-31 2011-11-29 Depuy Spine, Inc. Remotely-activated vertebroplasty injection device
DE10321350B4 (de) * 2003-05-13 2005-04-21 Lurgi Ag Mischvorrichtung
US8415407B2 (en) 2004-03-21 2013-04-09 Depuy Spine, Inc. Methods, materials, and apparatus for treating bone and other tissue
US8579908B2 (en) 2003-09-26 2013-11-12 DePuy Synthes Products, LLC. Device for delivering viscous material
CN106963464B (zh) 2004-07-30 2019-11-05 德普伊新特斯产品有限责任公司 外科用具
US9381024B2 (en) 2005-07-31 2016-07-05 DePuy Synthes Products, Inc. Marked tools
US9918767B2 (en) 2005-08-01 2018-03-20 DePuy Synthes Products, Inc. Temperature control system
US8360629B2 (en) * 2005-11-22 2013-01-29 Depuy Spine, Inc. Mixing apparatus having central and planetary mixing elements
CN101516412B (zh) 2006-09-14 2014-02-12 德普伊斯派尔公司 骨水泥及其使用方法
ES2587573T3 (es) 2006-10-19 2016-10-25 Depuy Spine, Inc. Sistema de liberación de fluidos y método relacionado
GB0808739D0 (en) 2008-05-14 2008-06-18 Univ Aston Thermal treatment of biomass
US9073019B2 (en) * 2010-04-19 2015-07-07 Cheese & Whey Systems, Inc. Blade arrangement for a food processing vat
US20190002324A1 (en) * 2016-03-01 2019-01-03 Wh Systems Method and Apparatus for the Treatment of Waste from Sewage Digestor
US10605143B2 (en) 2017-07-14 2020-03-31 Ford Global Technologies, Llc Exhaust gas mixer

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DE1255098B (de) * 1962-04-17 1967-11-30 Inst Chemii Ogolnej Vorrichtung zur thermischen Isomerisierung oder Disproportionierung von Alkalisalzen von Benzolcarbonsaeuren
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Also Published As

Publication number Publication date
DE10321350B4 (de) 2005-04-21
EP1622706A1 (de) 2006-02-08
WO2004101126A1 (de) 2004-11-25
JP2007502207A (ja) 2007-02-08
ATE352369T1 (de) 2007-02-15
CA2529581A1 (en) 2004-11-25
AU2004238009A1 (en) 2004-11-25
ES2281792T3 (es) 2007-10-01
US7677788B2 (en) 2010-03-16
DE10321350A1 (de) 2005-01-13
MXPA05012173A (es) 2006-08-18
AU2004238009B2 (en) 2009-11-12
JP4708348B2 (ja) 2011-06-22
CA2529581C (en) 2009-11-24
US20060181959A1 (en) 2006-08-17
DE502004002777D1 (de) 2007-03-15

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