WO2011076188A2 - Procédé pour enrobage à sec de grains, procédé pour produire au moins un corps filtrant, corps filtrant produit selon ce procédé et dispositif de mélange pour l'enrobage à sec de grains - Google Patents

Procédé pour enrobage à sec de grains, procédé pour produire au moins un corps filtrant, corps filtrant produit selon ce procédé et dispositif de mélange pour l'enrobage à sec de grains Download PDF

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Publication number
WO2011076188A2
WO2011076188A2 PCT/DE2010/001508 DE2010001508W WO2011076188A2 WO 2011076188 A2 WO2011076188 A2 WO 2011076188A2 DE 2010001508 W DE2010001508 W DE 2010001508W WO 2011076188 A2 WO2011076188 A2 WO 2011076188A2
Authority
WO
WIPO (PCT)
Prior art keywords
grains
mixing
porous
polymer particles
binder
Prior art date
Application number
PCT/DE2010/001508
Other languages
German (de)
English (en)
Other versions
WO2011076188A3 (fr
Inventor
Alois Domme
Oliver Roider
Original Assignee
Liquid Innovationsgesellschaft Mbh
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 Liquid Innovationsgesellschaft Mbh filed Critical Liquid Innovationsgesellschaft Mbh
Publication of WO2011076188A2 publication Critical patent/WO2011076188A2/fr
Publication of WO2011076188A3 publication Critical patent/WO2011076188A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1638—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/006—Coating of the granules without description of the process or the device by which the granules are obtained
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/10—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in stationary drums or troughs, provided with kneading or mixing appliances

Definitions

  • Process for the dry coating of grains process for the production of at least one filter body as well as filter body produced according to this process and mixing apparatus for dry coating of grains
  • the invention relates to a method for dry coating of grains according to the preamble of claim 1, a method for producing at least one filter body and according to this method produced filter body according to claims 1 1 and 13 and a mixing device for dry coating of grains according to the features of the preamble of claim 1 5.
  • Such filters include, inter alia, filters whose filter body by means of a
  • Such sintered filters comprise a housing in which a filter body is received.
  • the filter body is made from a loose bed of porous or non-porous grains of absorbent material, especially activated carbon or the like, absorbent materials.
  • the grains of the absorbent material are made by means of a binder in the form of a polymer, preferably polyethylene, which in porous granular form or in porous
  • Tuber form is present, sintered, in different elasticity ranges.
  • the sintering or the "baking process" of the filter body is usually carried out in different elasticity ranges of the introduced binder and its mixing with the grains of the absorbent material with each other prior to filling the sintering or baking mold and a compression by compressing or shaking the granules in the sintering or . Baking pan.
  • the granulate consisting of the loose bed of granules of the absorbent material and the binder is first introduced into a mold and compacted, for example, by exposure to mechanical vibrations or by shaking. This is followed by a heat treatment process, optionally under pressure, preferably below the melting temperature. Through this sintering process is over the porous
  • Binder particles creates a preferably pointwise connection between the compressed grains of the absorbent material, whereby a solid porous filter body with a filter matrix or space lattice structure is formed.
  • the binder particles or its particle size have a significant influence on the
  • Pore sizes of the filter body and thus its filter properties are provided.
  • filter bodies produced by known processes do not have a uniform filter structure or filter fineness due to the binder particles used, i.
  • the pore sizes of the filter matrix are different or arise at least partially nests of coarser density in the filter body.
  • a uniform compacting of the granules consisting of the loose bed of grains of the absorbent material and the binder particles by exposure to mechanical vibrations, vibrations or by shaking before the final matrix or space lattice formation of the filter body in the context of the manufacturing process is not guaranteed in the known production process. Becomes
  • the binder in its shape even slightly changed, by mechanical or thermal engineering
  • the binder particles are usually of different sizes, i. do not have a homogeneous structure, so that this already a uniform compression of the granules is extremely difficult or can only be realized by means of a high manufacturing complexity. Furthermore disadvantageous
  • claimed the binder has a volume fraction of at least 20% of
  • Filter body so that, for example, a filter made of activated carbon is a Adsorptions excelsle “ of " at least " 20% _ ⁇ f: Based on this, the present invention seeks to provide a method for dry coating of filter granules and a method for producing at least one filter body for the fine filtration of fluids or gases, which eliminates the disadvantages known from the prior art and in particular the
  • the essential aspect of the method according to the invention is to be seen in that the grains are subjected to a mixing process with the polymer particles in a mixing device and a mechanical frictional heat is generated by the mixing process, wherein by the frictional heat generated a coating of the grains with the binder.
  • the porous grains for example of carbon
  • Activated carbon or similar ground, crushed or crushed non-uniform powder or granule particles are processed to form a uniform homogeneous mesh, matrix or space lattice structure. Further advantageously, the uniform compression takes place before the formation of the final matrix / space lattice structure.
  • a viscoelastic film is produced by means of the generated mechanical frictional heat on the surface of the polymer particles, which leads to a coating of the grains with the binder due to the existing frictional resistance between the grains and the polymer particles.
  • the superficial thin viscoelastic "skin" of the polymer particles is thus scraped off in layers by the generated mechanical friction, which in particular enables the inward-acting thermal insulation caused by the porosity of the polymer particles.
  • the excellent sliding properties of the binder are enhanced by the coating on the grains of the absorbent
  • Transfer materials which advantageously allows a uniform and reproducible compression behavior in the context of the sintering process.
  • a further aspect of the method according to the invention can be seen in the fact that a mechanical frictional heat is generated at the metal surfaces of the mixing device which come into contact with the grains and the polymer particles due to the mixing process.
  • the mechanical frictional heat required for the coating is preferably generated at the mixing blades and the mixing vessel wall, wherein the frictional heat generated is precisely adjustable, through
  • the layer thickness is by means of
  • the mechanical mixing process is carried out until the
  • binders preferably high molecular weight low-density polyethylene particles are used, wherein the volume fraction of the binder in the mixture of grains and Polymer particles from over 20% to less than 10% is reduced.
  • Pore size of the filter matrix insignificantly influenced.
  • the mixing process is carried out until the polymer particles have a mixing temperature between 160 ° C and 220 ° C.
  • the polymer particles used for the preparation have a density between 0.45 g / cm 3 and 0.65 g / cm 3, preferably 0.55 g / cm 3 and a porosity between 35% and 65%, preferably 45%.
  • FIG. 1 shows a section through a filter with a filter body according to the invention
  • FIG. 2 shows a section through an alternative embodiment of a filter with a filter body according to the invention
  • FIG. 3 shows a section through a mixing device for coating a bulk material of porous grains of an absorbent material with a binder
  • FIG. 4 shows a cross section through the mixing device according to FIG. 1 along the line
  • FIGS. 1 and 2 show, by way of example, a schematic sectional illustration through a filter 1 for the fine filtration of fluids or gases, which has in each case a housing 2, a filter body 3 and a housing cover 4.
  • the housing 2 consists for example of a circumferential wall 2.1 and a bottom section 2.2, wherein the circumferential wall 2.1 in the embodiment of Figure 1 at least partially formed fluid and / or gas permeable.
  • the filter body 3 is accommodated in the housing 2 and the housing 2, which is still open at the top, is closed by the housing cover 4.
  • the supply of the fluid or gas to be filtered takes place via at least one
  • At least one outlet opening 4 ' is provided in the housing cover 4 to the outlet of the filtered gas or fluid.
  • the filter body 3 is annular in cross-section, for example, and has a central collecting channel 3 'for discharging the filtered fluid or gas via the outlet opening 4' to the outside.
  • the collection channel 3 ' runs
  • the fluid or gas to be filtered passes over the circumferential wall 2.1,
  • Filter bodies 3 different shapes and formats can be applied.
  • the filter body 3 is subjected to a sintering process from a bulk material of porous or non-porous grains 5 of an absorbent material, in particular a carbonaceous absorbent material, activated carbon or similar materials, together with a binder consisting of a plurality of porous polymer particles.
  • an absorbent material in particular a carbonaceous absorbent material, activated carbon or similar materials
  • the bulk material will before the sintering process, at least partially coated with the binder or a polymer layer derived therefrom, according to a method for
  • Dry coating porous or non-porous grains 5 Dry coating porous or non-porous grains 5.
  • mechanical frictional heat is generated, which leads to the coating of the porous grains 5 of the absorbent material with the binder.
  • the grains 5 of the absorbent material in particular carbon grains or activated carbon grains, for example, have an approximately homogeneous grain size, at least when using grains 5 to a particle size of about 80 // m. When using grains 5 a smaller grain size homogeneity is no longer guaranteed.
  • porous or non-porous grains 5 having at least two different particle sizes.
  • the porous or non-porous grains 5 are subjected to a pretreatment prior to the sintering process known per se, and indeed they are coated with a polymer layer by the mechanical mixing process according to the invention in the mixing device 6 set up for this purpose.
  • grains 5 with at least two different particle sizes only one of the two groups of grains is coated. The remaining group of grains 5 is added uncoated.
  • the filter fineness of the filter body 3 is adjustable.
  • the sliding properties of the porous grains 5 of the absorbent material are increased, without thereby closing the pores, in particular macropores of the absorbent material, i. the
  • the binder of porous polymer particles becomes almost completely soluble during the mixing process
  • Blending process for dry coating are produced.
  • the density of the porous polymer particles is, for example, between 0.45 g / cm 3 and 0.65 g / cm 3 , preferably 0.55 g / cm 3 .
  • the porosity of the polymer particles is between 35% and 65%, preferably 45%.
  • the dry coating process is carried out in a temperature range between 1 60 ° C and 220 ° C.
  • the heat present on the respective surface of the porous polymer particles causes a change in the surface strength of the outer layer of the porous polymer particle, namely, this becomes viscoelastic.
  • abrasion of the outer layer of the porous polymer particles by the grains 5 of the absorbent material is possible, which thus in the context of the mixing process with the
  • the outer layer of the porous polymer particles is preferably in a vorviskoseelastischen
  • the porous polymer particles are exposed to the effects of mixed friction until the particle size of the porous polymer particles, preferably of particles of high molecular weight low-density polyethylene, is reduced such that the filter fineness is no longer influenced thereby.
  • a thin viscous-elastic outer layer of the porous polymer particles is "scraped off" by friction by the described friction / melting process.
  • the coated with the binder, preferably high molecular weight low-density polyethylene, grains 5 are introduced after their coating in the form of bulk material in a sintered mold and compacted by mechanical vibrations or vibration in a vibrating process until the optimum and / or maximum bulk density is reached.
  • the filter fineness can be determined by the use
  • the sintered shape corresponds to the later form of the filter body 3.
  • the compacted coated porous grains 5 and added uncoated porous grains are sintered in the sintering mold, preferably in the just-viscous-elastic range, by light pressure for positional stability or by pressure in a pre-viscous-elastic range.
  • the filter body 3 has due to the inventive coating of the porous grains 5 in comparison to the known from the prior art mixture with the porous polymer particles on a more stable body structure, ie, the porous grains 5 are connected only at the mutual contact points surface, preferably slightly elastic. This results in the advantageous evenly
  • FIG. 3 shows, by way of example, a schematic section through a mixing device 6 for the coating according to the invention of the porous grains 5 of an absorbent material with the porous polymer particles.
  • the mixing device 6 consists of a closed mixing container 7, which has at least one filling opening 8 and one outlet opening 9, which are preferably provided at the opposite, front-side ends 7 ', 7 "of the mixing container 7.
  • a mixing blade 10 which is rotatably arranged about the longitudinal axis LB of the mixing container 7 and which preferably has a plurality of mixing blades 10.1, 10.2, 10.3, is mounted at the two opposite, end-side ends 7 ', 7 "of the mixing container 7.
  • FIG Line AA through the mixing device 6 and in Figure 5 shows a section along the line BB through the mixing blade 10.3.
  • the mixing blades 10.1, 10.2, 10.3 are on a common blade shaft 10 'driven, wherein the blade shaft 10', for example, along the longitudinal axis LB of the mixing container 7 and is guided by the front ends of the mixing container 7 to the outside.
  • the mixing blades 10.1, 10.2, 10.3 are preferably formed spirally and / or blade-like and are along the blade shaft 10 'offset from each other, and preferably by about 45 °.
  • the mixing blades 10.1, 10.2, 10.3 each have the same size and the same structure.
  • bearing assembly 1 1, 1 1 ' For rotatably supporting the blade shaft 10 'in the front ends 7', 7 "of the mixing container 7 each one concentric with the longitudinal axis LB of the mixing container 7 arranged bearing assembly 1 1, 1 1 'is provided consisting of a plurality of ball bearings.
  • the mixing blade 9 is driven off, for example, via an external motor unit 12 about the longitudinal axis LB of the mixing container 7.
  • the rotational speed is selected such that an optimal mechanical coating required for the coating
  • abrasive grains 5 in particular carbon grains or activated carbon grains is in the context of the mixing process at the passing with the grains 5 and the polymer particles in contact metal surfaces of the mixing device 6, in particular the inner walls of the mixing vessel 7 and the mixing blades 10.1, 10.2, 10.3 a mechanical
  • Friction heat generated with a friction temperature of more than 100 ° C The mixing process is continued until a mixing temperature between 160 ° C and 220 ° C in the mixing container 7 is present. The mixture is carried out until all
  • Polymer particles are dissolved in the mixture and thus a coating of the grains 5, in particular activated carbon grains is achieved with the viscoelastic film of polymer.
  • Embodiments or examples may be combined with features or sub-features of other embodiments or examples. LIST OF REFERENCE NUMBERS

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Filtering Materials (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

L'invention concerne un procédé pour enrober à sec des grains (5), poreux ou non, d'au moins un matériau absorbant, avec un liant constitué d'une pluralité de particules polymères poreuses, procédé selon lequel les grains (5) sont mélangés avec les particules polymères dans un dispositif de mélange (6), opération au cours de laquelle la friction mécanique génère de la chaleur qui provoque elle-même l'enrobage des grains (5) avec le liant. L'invention concerne également un procédé pour produire au moins un corps filtrant à partir des grains filtrants ainsi enrobés et le filtre ainsi produit.
PCT/DE2010/001508 2009-12-23 2010-12-22 Procédé pour enrobage à sec de grains, procédé pour produire au moins un corps filtrant, corps filtrant produit selon ce procédé et dispositif de mélange pour l'enrobage à sec de grains WO2011076188A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009060573.8 2009-12-23
DE200910060573 DE102009060573A1 (de) 2009-12-23 2009-12-23 Verfahren zur Trockenbeschichtung von Körnern, Verfahren zur Herstellung zumindest eines Filterkörpers sowie gemäß diesem Verfahren hergestellter Filterkörper und Mischvorrichtung zum Trockenbeschichten von Körnern

Publications (2)

Publication Number Publication Date
WO2011076188A2 true WO2011076188A2 (fr) 2011-06-30
WO2011076188A3 WO2011076188A3 (fr) 2011-09-09

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Application Number Title Priority Date Filing Date
PCT/DE2010/001508 WO2011076188A2 (fr) 2009-12-23 2010-12-22 Procédé pour enrobage à sec de grains, procédé pour produire au moins un corps filtrant, corps filtrant produit selon ce procédé et dispositif de mélange pour l'enrobage à sec de grains

Country Status (2)

Country Link
DE (1) DE102009060573A1 (fr)
WO (1) WO2011076188A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113279021A (zh) * 2021-05-17 2021-08-20 夏利 一种富铈混合稀土金属的制备设备

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US3270102A (en) * 1964-12-23 1966-08-30 Ken Mar Clay Products Ltd Method and apparatus for the production of hardened clay products
DE2905851A1 (de) * 1979-02-15 1980-08-21 Malvern Minerals Co Verfahren zur herstellung von modifizierten, teilchenfoermigen und/oder faserfoermigen, kristallinen und amorphen anorganischen substanzen
DE3533625A1 (de) * 1985-09-20 1987-04-02 Frenzelit Werke Gmbh & Co Kg Leichtwerkstoff und verfahren zu dessen herstellung
DE3719233A1 (de) * 1987-06-09 1988-12-22 Erich Busch Selbsttragender filterkoerper
EP0954374B1 (fr) * 1997-01-06 2004-11-24 Cerus Corporation Adsorbants et dispositifs permettant de reduire de petits composes organiques presents dans des produits sanguins
US6712974B1 (en) * 1997-01-10 2004-03-30 Advanced Minerals Corporation Filterable composite adsorbents
US7560214B2 (en) * 2004-05-27 2009-07-14 Panasonic Corporation Toner, process for producing toner, two-component developer and image forming apparatus
US20070256407A1 (en) * 2006-05-05 2007-11-08 Eaton Corporation Reformer temperature control with leading temperature estimation
DE102007031425A1 (de) * 2007-07-05 2009-01-22 Kmpt Ag Mischtrockner und/oder Reaktor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113279021A (zh) * 2021-05-17 2021-08-20 夏利 一种富铈混合稀土金属的制备设备

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WO2011076188A3 (fr) 2011-09-09
DE102009060573A1 (de) 2011-07-07

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