EP0040270A1 - Dispositif pour le mélange de matériaux fluides - Google Patents

Dispositif pour le mélange de matériaux fluides Download PDF

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Publication number
EP0040270A1
EP0040270A1 EP80301584A EP80301584A EP0040270A1 EP 0040270 A1 EP0040270 A1 EP 0040270A1 EP 80301584 A EP80301584 A EP 80301584A EP 80301584 A EP80301584 A EP 80301584A EP 0040270 A1 EP0040270 A1 EP 0040270A1
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EP
European Patent Office
Prior art keywords
flights
paths
zone
helical
flight
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
EP80301584A
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German (de)
English (en)
Other versions
EP0040270B1 (fr
Inventor
Edwin Merriam Glocker
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE8080301584T priority Critical patent/DE3069264D1/de
Priority to EP80301584A priority patent/EP0040270B1/fr
Publication of EP0040270A1 publication Critical patent/EP0040270A1/fr
Application granted granted Critical
Publication of EP0040270B1 publication Critical patent/EP0040270B1/fr
Expired legal-status Critical Current

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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
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B01F25/43161—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod composed of consecutive sections of flat pieces of material
    • 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
    • B01F25/80—Falling particle mixers, e.g. with repeated agitation along a vertical axis
    • B01F25/83—Falling particle mixers, e.g. with repeated agitation along a vertical axis with receptacles provided with fixed guiding elements therein, e.g. baffles; Cross-mixers comprising crossing channels for guiding the falling particles

Definitions

  • the type of , blending employed will depend on such factors as the homogeneity requirements of the final product, variances in the physical and chemical properties of the components, the tendency of the components to segregate on storage and the like.
  • the mixing devices of the prior art are characterized by deficiencies primarily in that they are directed to blending of material at a specific point in the equipment with little or no provision for retarding material or accelerating its flow during mixing to insure a greater uniformity in the final stream.
  • the flow is induced by gravity and the only energy employed is that required to elevate the material to the top of the mixer.
  • This gravity flow continuous mixer avoids undesirable plug-flow and channelling of material in its passage through the mixer.
  • the mixer attenuates the moving stream so that some material advances more rapidly than other and mixes with material which has already entered, while other material is diverted to paths which move more slowly and is mixed with material which has entered- the mixer later.
  • the result is a more uniform blending of materials of widely varying physical properties.
  • Mixing the attenuation are accomplished by inclined surfaces arranged around a vertical axis in sets of tiers extending inwardly from the walls of the mixer.
  • the number of sets influences the extent of mixing and the interval between sets determines how many times the total flow will be divided into individual portions and recombined with other portions. Since the flights are arranged in sets, the material falls from one flight to a lower flight so that there is a change in direction from sliding across a fixed inclined surface to free fall to a lower surface. Further mixing and flow of material is accomplished by diverting portions of material through openings in the flights which causes such portions to fall or short-circuit to the surface immediately below.
  • the extent of mixing depends on: (1) the number of flights in a set; (2) the number of sets; (3) the distance between sets; (4) the relative area of openings in the surfaces of the flights through. which material can fall; (5) the arrangement of the openings in the flights; (6) the angle of inclination of the flights; and (7) the area of the flights.
  • Fig. 1 is a perspective view, partly in section of a mixer of the present invention showing the arrangement of flights within the apparatus;
  • Fig.2 is a cross-sectional view of Fig. 1 taken along line 2-2 showing the arrangement of flights in a four-sided mixer;
  • Fig.3 is a side view of one wall of the mixer shown in Fig. 2;
  • Fig. 4 is a view of the sidewall with the flights shown in Fig. 3 viewed along the line 4-4.
  • Fig. 1 shows an overall complete mixer of the present-invention.
  • the apparatus includes a mixing zene 10, a feed hopper 12 above and a collector 14 below.
  • Hopper 12 may be divided into bins shown at 16 and 18. Additional bins may be provided as needed for the particular purpose for which the mixer is to be used.
  • my three-dimensional quincunx mixer which is the subject of United States application Ser. No. 972,667 filed December 26, 1978. This quincunx mixer would provide better distribution of material over the entire cross-sectional area of the mixer 10.
  • Flow of material 20 and 22 into mixer 10 is controlled by appropriate means here shown as a slide gate 24, the rate of flow being controlled by the size of the opening in the gate through which material is allowed to flow.
  • the material being fed into mixer 10 is uniformly distributed over the entire cross-sectional area so that substantially equal quantities strike the first flights at the top of the mixer 10. In its fall through the mixer 10, the material will undergo a multiplicity of divisions, diversions, abrupt changes in direction, and recombinations, all of which provides a thorough blending of the materials.
  • Mixer 10 is shown as a polygonal vessel having four sides 26, 28, 30 and 32. Arranged in tiers and extending inwardly from the sides are flights a,b,c,d,e,f, and g. In the apparatus shown, these flights are triangular and they slope along the walls to which they are attached. The flights are positioned with.respect to the flights on adjacent walls to define a plurality of stacked square helical paths along which material flows in moving from the top to bottom of mixer 10. The flights in the top set are truncated as shown at 26a. However, these truncated flights can be omitted, if desired, but they cause better distribution of the material and act as an additional set of flights.
  • Each of the flights 26 is provided with one or more openings 34 near the middle. These openings are here shown as pairs of holes in the center of each flight. These openings may be single or plural and they may be positioned uniformly above each other in the tiers. They may be offset somewhat so that material falling through each will be sure to strike the flight below and will not short-circuit to the bottom of the mixer. The placement of these openings 34 will depend somewhat on theflow characteristics of the material being mixed. It may be desirable to provide a deflector plate on the under side of the flights below the openings 34 to prevent such short-circuiting if that is a problem. Insome situations, short-circuiting is desirable. Also, in some situations, some of the flights may not be provided with holes 34.
  • material flowing from top to bottom will flow in eight different helical paths.
  • a portion of material on each flight is diverted through the openings 34 to the path immediately below, another portion is diverted to the path immediately above but at a lower point of entrance and a third portion continues along the same path for combining with material being added to that path.
  • the material on each flight is made up of three portions of material from three different points in the stream. Because of this multiplicity of divisions, diversions free-falls and recombinations, the material reaching collector 14 is a uniform blend of the material in the mixer at that time.
  • This mixer is particularly suited for mixing bulk materials such as dry fertilizers which usually comprise at least three components of different different physical characteristics and subject to serious segregation during handling. With the mixer of the present invention, it is possible to obtain a quite uniform blend of product. It is also useful in preparation of laboratory samples because a single pass through the mixer is equivalent to several rotations of a typical blender found in many laboratories.
  • the mixer of the present invention can also be used as a storage tank and once it is filled, material moving downward will undergo the same divisions, diversions and recombinations described above although the deflections will not be as violent as with fast- moving material. Material stored in thms mixer will not be subject to segregation that normally occurs when material as added to or withdrawn from an ordinary tank.
  • my mixer While I have described my mixer as having four sides, it is to be understood that it can have any desired polygonal shape and can even be round. However, a four-sided shape is preferred because it is most efficient in uniformity of results and in ease of construction and integration into usual plant facilities.
  • the mixer was a four-sided device about 10 inches (25.4 cm) high with sides 2 inches (5.1 cm) wide. There were 9 sets of flights with an additional truncated set at the top. Each flight was set at an angle of 45 degrees along the walls to which it was attached. Each flight except the four truncated ones had two holes of about 0.25 inches (0.64 cm) diameter in the middle. Spacing between the flights was about 11/16 inches (1.75 cm). With this number of flights and the indicated spacing, material passing from the top to the bottom made at least one complete turn around the vertical axis.
  • the mixer was placed on top of a clear receiving cylinder about 10 inches (25.4 cm) high having a diameter of 1.5 inches (3.8 cm).
  • a feed hopper comprising a pair of longitudinally truncated cylinders about 6 inches (15.2 cm) in diameter, and each having a bottom which sloped towards a slit outlet was set on top of the mixer. The openings were closed.by a slide gate for controlling the size of the opening.
  • the first tests were carried out with table salt, a portion of which had been dyed with a vegetable dye and dried. The other portion was used as it came from the container..
  • One of the tubular compartments of the hopper was filled with untreated salt and the other was filled with dyed salt.
  • the two materials were fed into the mixer at the same rate until the hopper was empty on one side at which time, the gate was closed. The material passed through the mixer without bridging or sticking. Visual examination of the material in the collecting cylinder showed that it was uniformly blended from top to bottom.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
EP80301584A 1980-05-15 1980-05-15 Dispositif pour le mélange de matériaux fluides Expired EP0040270B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE8080301584T DE3069264D1 (en) 1980-05-15 1980-05-15 Apparatus for mixing fluent materials
EP80301584A EP0040270B1 (fr) 1980-05-15 1980-05-15 Dispositif pour le mélange de matériaux fluides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80301584A EP0040270B1 (fr) 1980-05-15 1980-05-15 Dispositif pour le mélange de matériaux fluides

Publications (2)

Publication Number Publication Date
EP0040270A1 true EP0040270A1 (fr) 1981-11-25
EP0040270B1 EP0040270B1 (fr) 1984-09-26

Family

ID=8187164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80301584A Expired EP0040270B1 (fr) 1980-05-15 1980-05-15 Dispositif pour le mélange de matériaux fluides

Country Status (2)

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EP (1) EP0040270B1 (fr)
DE (1) DE3069264D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2929075A1 (fr) * 2008-03-28 2009-10-02 Yves Godrie Dispositif de distribution d'aliments pour animaux d'elevage, mettant en oeuvre des moyens de transfert controles pour delivrer une quantite dosee de produits
CN103191902A (zh) * 2013-03-28 2013-07-10 鲁正友 冲击式无动力建筑废物再生种植土、稳定土拌合系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE432524C (de) * 1926-08-07 Robert Mulsow Dipl Ing Vorrichtung zum Mischen von koernigem Gut
GB581849A (en) * 1944-05-08 1946-10-28 Newton Chambers & Co Improvements relating to the mixing of materials
DE1782511U (de) * 1957-07-18 1959-02-05 Polysius Gmbh Vorrichtung zum mischen.
US3536303A (en) * 1968-08-07 1970-10-27 United States Steel Corp Material blending apparatus
DE2428653A1 (de) * 1974-06-14 1976-01-02 Philips Patentverwaltung Verfahren zum mischen fluessiger oder fliessfaehiger, pulverfoermiger stoffe und vorrichtung zur durchfuehrung dieses verfahrens
US3963221A (en) * 1974-02-28 1976-06-15 Union Carbide Corporation Mixing apparatus
US3977657A (en) * 1973-10-23 1976-08-31 Charles John Shearer Apparatus for mixing particulate solids

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE754657Q (fr) * 1965-11-29 1971-01-18 Kenics Corp Appareil melangeur

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE432524C (de) * 1926-08-07 Robert Mulsow Dipl Ing Vorrichtung zum Mischen von koernigem Gut
GB581849A (en) * 1944-05-08 1946-10-28 Newton Chambers & Co Improvements relating to the mixing of materials
DE1782511U (de) * 1957-07-18 1959-02-05 Polysius Gmbh Vorrichtung zum mischen.
US3536303A (en) * 1968-08-07 1970-10-27 United States Steel Corp Material blending apparatus
US3977657A (en) * 1973-10-23 1976-08-31 Charles John Shearer Apparatus for mixing particulate solids
US3963221A (en) * 1974-02-28 1976-06-15 Union Carbide Corporation Mixing apparatus
DE2428653A1 (de) * 1974-06-14 1976-01-02 Philips Patentverwaltung Verfahren zum mischen fluessiger oder fliessfaehiger, pulverfoermiger stoffe und vorrichtung zur durchfuehrung dieses verfahrens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2929075A1 (fr) * 2008-03-28 2009-10-02 Yves Godrie Dispositif de distribution d'aliments pour animaux d'elevage, mettant en oeuvre des moyens de transfert controles pour delivrer une quantite dosee de produits
CN103191902A (zh) * 2013-03-28 2013-07-10 鲁正友 冲击式无动力建筑废物再生种植土、稳定土拌合系统
CN103191902B (zh) * 2013-03-28 2015-03-04 鲁正友 冲击式无动力建筑废物再生种植土、稳定土拌合系统

Also Published As

Publication number Publication date
DE3069264D1 (en) 1984-10-31
EP0040270B1 (fr) 1984-09-26

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