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EP3860763B1 - Dispositif d'alimentation avec un élément de dosage pour une presse à rouleaux - Google Patents

Dispositif d'alimentation avec un élément de dosage pour une presse à rouleaux

Info

Publication number
EP3860763B1
EP3860763B1 EP19779827.5A EP19779827A EP3860763B1 EP 3860763 B1 EP3860763 B1 EP 3860763B1 EP 19779827 A EP19779827 A EP 19779827A EP 3860763 B1 EP3860763 B1 EP 3860763B1
Authority
EP
European Patent Office
Prior art keywords
control element
roller
dosing
gap
outer sections
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.)
Active
Application number
EP19779827.5A
Other languages
German (de)
English (en)
Other versions
EP3860763A1 (fr
Inventor
Dieter Brendler
Niko Hachenberg
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.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag 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 KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Publication of EP3860763A1 publication Critical patent/EP3860763A1/fr
Application granted granted Critical
Publication of EP3860763B1 publication Critical patent/EP3860763B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C4/00—Crushing or disintegrating by roller mills
    • B02C4/28—Details
    • B02C4/286—Feeding devices

Definitions

  • the invention relates to a feeding device for feeding brittle ground material onto a roller gap formed between two rollers of a roller press, comprising a material feeding chute above the roller gap and a metering device with a metering body for metering the stream of brittle ground material emerging from the material feeding chute and flowing to the roller gap, wherein the metering body has a lower boundary surface which defines a space between the metering body and the roller surface of a first of the two rollers for the passage of the brittle ground material.
  • Roller presses are used to crush granular, brittle ground material, for example, cement clinker sintered from cement raw meal in a rotary kiln in the cement production process, in the nip between two counter-rotating rollers of this roller press (high-pressure roller press) by applying material to the material bed under high pressure.
  • one of the two rollers is designed as a fixed roller, supported against the machine frame, while the other roller is designed as a floating roller.
  • the floating roller is typically supported by associated bearing blocks against hydraulic cylinders of a hydropneumatic system, which generates the roller pressing force.
  • Dosing devices positioned downstream of the feed chute and upstream of the roller gap have proven to be even more suitable for dosing.
  • the patent specification discloses DE 102 33 811 B4 after the side A movable, height-adjustable metering slide is provided in the offset feed chute.
  • This is essentially plate-shaped and forms a gap-like space between its lower edge or underside on the one hand and the roller surface of one roller on the other hand, such that the ground material flow emerging downwards from the feed chute must flow through this space.
  • the ground material flow in the amount per unit of time and thus the feed quantity fed to the roller gap following in the flow direction are suitably reduced or increased.
  • a comparable enlargement or reduction of a corresponding passage area for the ground material flow to be fed is achieved according to the teaching of the publication DE 42 26 182 A1 achieved by adjustable or pivoting dosing flaps, which are arranged at the lower end of the material feed chute.
  • the flow rate i.e. the quantity of ground material fed into the roller gap per unit of time, is typically only roughly pre-adjustable and generally requires the described, controlled or even regulated dosing adapted to the operating process.
  • dosing devices known from the prior art with the above-mentioned dosing flaps or dosing slides as dosing bodies generally change the quantity distribution of the ground material to be fed axially along the roller gap, whereby the corresponding influence also depends, within certain limits, on the position of the dosing flap or dosing slide, which is why this cannot be easily and sufficiently compensated for by a pre-modified geometry of the material feed chute.
  • the known basic form of these dosing bodies is such that for each position of the dosing element between the lower edge of the dosing body (dosing slide, flap) and the corresponding roller surface there is a constant distance along the axial length.
  • dosing with dosing devices of this type leads to a change in the quantity distribution along the roller gap in such a way that relatively more ground material is fed into the roller gap at the axial ends and relatively less in the axial middle than without dosing.
  • the object of the invention is therefore to provide a feeding device of the type mentioned at the outset for feeding brittle ground material onto the roller gap formed between the two rollers of the roller press, in which the aforementioned disadvantages of the prior art are overcome or at least reduced.
  • a feeding device for feeding brittle ground material onto a roller gap formed between two rollers of a roller press, having the features of claim 1. Further advantageous embodiments are specified in the subclaims to claim 1.
  • the lower boundary surface of the dosing body is projecting at one outer section relative to the longitudinal extent of the roller gap, so that in the area of these two outer sections the space between the dosing body and the roller surface the first roller is narrower than the gap between the dosing body and the roller surface of the first roller in the area of the middle section of the lower boundary surface of the dosing body located between the two outer sections.
  • the dosing body as part of the dosing device which in addition to the dosing body typically also includes a mechanism for adjusting the dosing body and a drive or a manual adjustment device, forms a gap through its spacing from one of the two rollers (first roller) through which the ground material flowing from the material outlet opening of the material feed chute passes on its way to the roller gap.
  • the dosing body of the dosing device is adjustable in its position so that the size of the gap and thus the amount of ground material passing through per unit of time can be changed or controlled.
  • the said gap extends in the longitudinal direction of the roller gap, i.e.
  • the shape of the metering body according to the invention can be simplified as follows: the metering body is extended downwards at the bottom, i.e. on its side oriented towards the first roller, in each case in the outer region - formulated in relation to its longitudinal extent. It therefore has downwardly projecting partial regions (in short: parts) in which the distance to the roller surface of the first roller is smaller in a normal position of the metering body, i.e., a position suitable for the metering process, than in the central region, which here refers to the entire area between these two outer partial regions.
  • the profile of the metering body on the underside is symmetrical with respect to a vertical center plane.
  • one protruding outer section of the lower boundary surface of the metering body can be designed larger than the other - in terms of its extension in the axial direction and/or its vertical extension transverse to the axial direction, thus corresponding to a more significantly reduced height or opening width of the gap there.
  • Essentially plate-shaped dosing bodies can also be used for dosing elements, which allow both translational and rotational movement.
  • the designation of the dosing bodies in this embodiment as essentially plate-shaped refers to the flat, planar basic shape of the dosing body with a narrow lower boundary surface or edge.
  • the downwardly projecting extension parts or regions provided according to the invention are then also plate-shaped.
  • the dosing body particularly in the upper region but not in the extension regions, may also have functional elements that deviate from the plate shape, in particular for the mounting and drive mechanism, in addition to its basic shape.
  • FIG. 2 A schematic, three-dimensional oblique view of a metering body 8 of a feed device 1 according to the invention is shown.
  • the milling material flow 2 indicated by arrows in its direction of movement, passes from the material feed chute 5 between the metering body 8 and the first roller 6, which is the only one shown here, in the direction of the roller gap 3 (not shown), which adjoins the viewer.
  • the (geometric) rotation axis 14 of the roller 6 is shown.
  • FIG. 3 and Figure 4 show two embodiments of the metering body 8 according to the invention above the first roller 6 in a schematic sketch.
  • the metering body 8 can be designed as a height-adjustable metering slide 7 or a rotatable metering flap 13 and in each case has a plate-like basic shape. Its lower profile line resulting in this longitudinal section is composed of two outer sections 18 and a middle section 15. While in the embodiment of the Figure 3 in the outer sections 18 there is a constant distance A to the surface of the roller 6, in the embodiment of the Figure 4
  • the lower boundary surface 16 in the outer sections 18 is not parallel to the horizontal center plane of the rollers 6, 12. Instead, it slopes downwards toward the outer ends of the metering body 8, located here on the left and right.
  • FIG 5 is a schematic cross-sectional sketch through a further design of the dosing body 8 according to the invention, wherein the section in the lower region of the dosing body 8 is parallel to the horizontal plane containing the rotation axes 14 of the two rollers 6, 12.
  • the dosing body 8 has, in its outer sections 18 in the area of the downwardly projecting parts 11, a concavely curved profile 20 on the side facing the ground material flow 2 coming from the material feed chute 5 (i.e. not the underside 16), whereby the ground material 2 has previously emerged from the material feed chute 5.
  • This concave curvature 20 of the extension parts has the effect of preventing any ground material 2 from escaping at the axial ends of the upper roller gap area 3.
  • the exact design of the concavely curved profile 20 will be carried out by a person skilled in the art with reference to a setting position of the dosing body 8 which is frequently set in practice, possibly a middle setting position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Claims (7)

  1. Dispositif d'alimentation (1) destiné à alimenter un matériau à broyer cassant (2) dans un interstice de laminoir (3) formé entre deux cylindres (6, 12) d'une presse à cylindres (4), comprenant :
    - une goulotte d'alimentation (5) située au-dessus de l'interstice de laminoir (3), et
    - un dispositif de régulation d'alimentation (9) comportant un organe de régulation (8) destiné à réguler le flux de matériau à broyer cassant (2) sortant de la goulotte d'alimentation (5) et s'écoulant vers l'interstice de laminoir (3),
    l'organe de régulation (8) comportant une surface inférieure de délimitation (16) qui définit un espace (10) entre l'organe de régulation (8) et la surface du cylindre d'un premier des deux cylindres (6), permettant le passage du matériau à broyer cassant (2),
    caractérisé en ce que
    la surface inférieure de délimitation (16) de l'organe de régulation (8) présente, à chacune de ses sections extérieures (18), par rapport à l'étendue longitudinale de l'interstice de laminoir (3), un dépassement, de sorte que, dans la zone de ces deux sections extérieures (18), l'espace (19) entre l'organe de régulation (8) et la surface du premier cylindre (6) est plus étroit que l'espace (17) correspondant dans la section centrale (15) de la surface inférieure de délimitation (16) située entre les deux sections extérieures (18).
  2. Dispositif d'alimentation (1) selon la revendication 1,
    caractérisé en ce que
    chacune des deux sections extérieures saillantes (18) de la surface inférieure de délimitation (16) de l'organe de régulation (8) s'étend depuis l'extrémité correspondante de l'organe de régulation (8) vers le centre, dans la direction longitudinale de l'interstice de laminoir (3), sur une longueur allant jusqu'à 10 % de la longueur totale de l'organe de régulation (8).
  3. Dispositif d'alimentation (1) selon l'une des revendications 1 ou 2,
    caractérisé en ce que
    le dispositif de régulation d'alimentation (9) est réalisé
    - soit sous forme de dispositif de régulation à tiroir (9), l'organe de régulation (8) étant un tiroir de dosage (7) sensiblement en forme de plaque,
    - soit sous forme de dispositif de régulation à clapet (9), l'organe de régulation (8) étant un clapet de dosage (13) sensiblement en forme de plaque.
  4. Dispositif d'alimentation (1) selon la revendication 3,
    caractérisé en ce que
    la surface inférieure de délimitation (16) de l'organe de régulation (8), dans la zone des deux sections extérieures saillantes (18), s'étend sensiblement parallèlement au plan médian horizontal des deux cylindres (6, 12), en se référant à une orientation verticale supposée de l'organe de régulation (8).
  5. Dispositif d'alimentation (1) selon la revendication 3,
    caractérisé en ce que
    la surface inférieure de délimitation (16) de l'organe de régulation (8), dans la zone des deux sections extérieures saillantes (18), s'incline respectivement vers les extrémités extérieures de l'organe de régulation (8), de sorte que, dans cette zone, la distance entre la surface inférieure de délimitation (16) de l'organe de régulation (8) et la surface du premier cylindre (6) diminue vers l'extérieur.
  6. Dispositif d'alimentation (1) selon l'une des revendications 1 à 5,
    caractérisé en ce que
    les parties saillantes (11) de l'organe de régulation (8), définies par les deux sections extérieures saillantes (18) de la surface inférieure de délimitation (16), sont reliées de manière mobile à la partie restante de l'organe de régulation (8).
  7. Dispositif d'alimentation (1) selon l'une des revendications 1 ou 2,
    caractérisé en ce que
    les parties saillantes (11) de l'organe de régulation (8), définies par les deux sections extérieures saillantes (18) de la surface inférieure de délimitation (16), présentent, sur leur face intérieure tournée vers le flux du matériau à broyer cassant (2), un profil incurvé concave (20) s'étendant, dans la direction longitudinale de l'interstice de laminoir (3), vers l'extrémité respective de l'organe de régulation (8).
EP19779827.5A 2018-10-01 2019-09-26 Dispositif d'alimentation avec un élément de dosage pour une presse à rouleaux Active EP3860763B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202018105629.8U DE202018105629U1 (de) 2018-10-01 2018-10-01 Aufgabevorrichtung mit Dosierorgan für eine Rollenpresse
PCT/EP2019/075985 WO2020069955A1 (fr) 2018-10-01 2019-09-26 Dispositif d'alimentation pourvu d'organe de dosage pour une presse à rouleaux

Publications (2)

Publication Number Publication Date
EP3860763A1 EP3860763A1 (fr) 2021-08-11
EP3860763B1 true EP3860763B1 (fr) 2025-07-23

Family

ID=63962834

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19779827.5A Active EP3860763B1 (fr) 2018-10-01 2019-09-26 Dispositif d'alimentation avec un élément de dosage pour une presse à rouleaux

Country Status (4)

Country Link
EP (1) EP3860763B1 (fr)
DE (1) DE202018105629U1 (fr)
DK (1) DK3860763T3 (fr)
WO (1) WO2020069955A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019120469B4 (de) * 2019-07-30 2025-07-24 Khd Humboldt Wedag Gmbh Aufgabevorrichtung für eine Hochdruckwalzenpresse

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3305339A1 (de) 1983-02-17 1984-08-23 Klöckner-Humboldt-Deutz AG, 5000 Köln Verfahren und vorrichtung zur kontinuierlichen druckzerkleinerung sproeden mahlgutes
DE4226182A1 (de) 1992-08-07 1994-02-10 Kloeckner Humboldt Deutz Ag Anlage und Verfahren zur Druckbehandlung körnigen Gutes
DE10233811B4 (de) 2002-07-25 2013-05-29 Khd Humboldt Wedag Gmbh Zweiwalzenmaschine zur Druckbehandlung körnigen Gutes
DE202010009151U1 (de) 2010-06-16 2010-09-16 Khd Humboldt Wedag Gmbh Aufgabeschacht für eine Walzenpresse

Also Published As

Publication number Publication date
DK3860763T3 (da) 2025-10-27
EP3860763A1 (fr) 2021-08-11
DE202018105629U1 (de) 2018-10-08
WO2020069955A1 (fr) 2020-04-09

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