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WO2002000351A1 - Broyeuse - Google Patents

Broyeuse Download PDF

Info

Publication number
WO2002000351A1
WO2002000351A1 PCT/SE2001/001348 SE0101348W WO0200351A1 WO 2002000351 A1 WO2002000351 A1 WO 2002000351A1 SE 0101348 W SE0101348 W SE 0101348W WO 0200351 A1 WO0200351 A1 WO 0200351A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
cutting edge
slots
axis
angle
Prior art date
Application number
PCT/SE2001/001348
Other languages
English (en)
Inventor
Gunnar Öhrn
Original Assignee
Oehrn Gunnar
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 Oehrn Gunnar filed Critical Oehrn Gunnar
Priority to AU2001274743A priority Critical patent/AU2001274743A1/en
Priority to EP01941385A priority patent/EP1343588A1/fr
Publication of WO2002000351A1 publication Critical patent/WO2002000351A1/fr

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
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
    • B02C18/0092—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage for waste water or for garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/062—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives with rotor elements extending axially in close radial proximity of a concentrically arranged slotted or perforated ring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof

Definitions

  • the present invention relates to an apparatus of the kind defined in the preamble of Claim 1, for comiTiinuting, or finely dividing, food wastes in water to form a mixture or slurry.
  • the slurry shall be suited for biogas-winning and will preferably also have a high dry solids content.
  • the slurry After having been prepared, the slurry is led to a fermentation tank in which biogas is acquired. After winning biogas, the solid rests in the slurry are made hygienic, i.e. heat- treated, the thickness of the solid rest particles preferably being at most about 10 mm.
  • a known apparatus of this kind comprises a tubular wall which has a rotational- symmetrical inner surface with sieve openings distributed around the wall periphery, wherewith the inner surface of the wall delimits a comminuting chamber that includes a rotationally driven impeller which is coaxial with the wall and which includes a cutting edge, wherein the comminuted or finally divided waste material is able to pass through the openings into a collection chamber.
  • the earlier apparatus normally operate with slurries that have relatively low dry solid contents slurry, meaning that relatively large biogas production tanks are required and that relatively large amounts of energy are consumed in rendering the waste hygienic subsequent to winning said biogas and/or for de-watering in connection with dumping the solid rests.
  • one object of the invention is to provide an apparatus that will operate effectively with slurries that have a relatively high dry solids content and also to enable troublesome types of waste products to be disintegrated effectively, such as fish skin, salmon skin, and the like.
  • the cutting edge shall be arranged to sweep closely adjacent to a wall surface that includes slot-like openings, wherein said cutting edge is adapted to define an angle in the region of 10-80° relative to the longitudinal direction of the slots swept by said cutting edge, said slots being essentially similarly orientated in relation to each other.
  • the angle is chosen so as to establish a clipping effect between the cutting edge and one long edge of respective slots.
  • the cutting edge is conveniently disposed on a knife that is generally parallel with the inner surface of said wall and moves adjacent thereto.
  • the cutting edge and the slots suitably have opposite slopes in relation to a line on the surface of the inner wall that extends parallel with the axis.
  • the slots may have a length/width ratio in the order of 1 :3, wherewith the slots may have a width of about 1 cm and a length of about 3 cm, for instance.
  • the cutting edge and the slots are conveniently arranged so that when sweeping over a slot the cutting edge will cross said slot at a point which is displaced progressively along the slot, preferably upwards in the arrangement.
  • the length direction of the slots deviates from the rotational direction of the cutting edge suitably by at least 50°.
  • the chamber has a generally vertical axis, wherewith the slots and the cutting edge are orientated to have an intersection point that moves upwards in the chosen direction of rotation of the cutting edge.
  • the apparatus also includes means for supplying water and waste to the chamber continuously, wherein said means can be set to produce a slurry that has a dry substance content of at least 5%, preferably at least 10%, more preferably at least 15% and even more preferably about 20% or higher.
  • the apparatus may include a chamber for collecting the slurry that passes through the slots, said chamber being connected to a ferIERation tank for winning biogas.
  • Fig. 1 is a schematic axial section view of an inventive apparatus.
  • Fig. 2 is a schematic section view taken on the line II-II in Fig. 1.
  • Fig. 1 shows a container 1 which receives, via respective conduits 20, 30, water and food waste/domestic waste in proportions chosen in relation to each other,.
  • Each conduit is shown to include a respective valve 21 and 31 and is also shown to be connected to a respective pump 22 and 32, wherein the apparatus is adapted to establish in the container a slurry that has a chosen dry solids content.
  • the illustrated container is essentially rotational-symmetrical about a vertical axis 2 and has a downwardly narrowing diameter, including a generally cylindrical wall section 11.
  • Located immediately beneath the bottom edge of said section 11 is a bottom plate 3 which is rotatable about the axis 2 and which carries at its periphery a knife 4.
  • the wall section 11 forms part of a ring-shaped collecting box 5 which includes an outlet pipe 6 that leads to a tank 7.
  • the wall section 11 includes transit openings 8, which are disposed in rows that lie respectively in a plane normal to the axis 2.
  • the openings 8 in respective rows are preferably similarly orientated in relation to each other.
  • the knife 4 of the illustrated embodiment has a forwardly extending cutting edge 41 which lies closely adjacent the inner surface of the wall section 11 and which defines a line 42 that forms an angle ⁇ with a line 50, which is parallel with the axis 2 and lies on the inner surface of the wall section 11.
  • the wall 41 slopes upwardly and rearwardly in relation to its movement direction 43, which lies in a plane normal to the axis 2.
  • the openings 8 have a generally elongate slot-like form.
  • the slots 8 have a length/width ratio of 3: 1, wherewith the width is about 10 mm and the length about 30 mm.
  • the slots 8 and the cutting edge 41 are generally straight in their longitudinal direction, and curved extensions are possible provided that the inventive clipping effect is achieved.
  • the slots 8 are orientated so that their long axes 81 will define an angle ⁇ relative to the axis 50, said angle preferably being about 30°.
  • ⁇ + ⁇ is greater than 10° and preferably greater than 20°. ⁇ + ⁇ is suitably 70° at the highest. Preferably, ⁇ + ⁇ is in the range of 20-60°, for instance about 40°, although the clipping angle ⁇ + ⁇ may, of course, be chosen with respect to the clipping effect desired in respect of material that is difficult to disintegrate or shred.
  • the cutting blade 4 is suitably generally parallel with the inner surface of the wall 11.
  • the bottom plate rotatably driven about the axis 2 may, of course, carry a plurality of knives 4.
  • the angle ⁇ between the direction of movement 43 of the knife and the length direction of the slot will preferably be at least 10° and more preferably about 60° in the illustrated case. This angle shall be chosen so as to prevent pieces of material from being displaced along respective slots without being clipped or cut against the long edges of the slots.
  • wall section 11 is shown to be generally cylindrical, it will be evident that the generatrix of the wall section 11 may be inclined to the axis 2.
  • the collecting box 5 has a corner gap, which is sealed by the edge of the bottom plate disposed adjacent thereto with a small clearance.
  • the collecting box 5 may have a generally closed cross-sectional profile whose inner wall is provided with the slots 8 that are swept by the knife 4.
  • Fig. 2 shows the slots 8 disposed in two mutually parallel rows, wherewith the slots 8 in both rows are mutually aligned in pairs.
  • the slots may be included in fewer or more rows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

L'invention concerne une broyeuse de déchets (par exemple, alimentaires et/ou domestiques), permettant un broyage dans l'eau en division fine sous forme de suspension épaisse. La broyeuse comprend une paroi tubulaire (11) dont la surface interne comporte un axe, autour duquel cette surface est symétrique en rotation. Ladite surface interne comporte, en périphérie de paroi, des ouvertures en forme de fente qui tiennent lieu de tamis, généralement d'orientation similaire entre elles, et la paroi délimite une chambre de broyage qui comprend un support d'outil tranchant rotatif, tournant autour de l'axe (2) de la paroi (11) et portant une arête de coupe (41). Celle-ci (41) se déplace en position très serrée contre la surface interne de la paroi (11), balayant les ouvertures (8). L'arête de coupe (41) définit un angle dans une fourchette comprise entre 10 et 80 % par rapport à l'axe de la longueur des ouvertures respectives balayées, dans la surface interne de la paroi (11), et la direction de rotation de l'arête de coupe dévie d'au moins 10 ° par rapport à l'axe de la longueur des ouvertures.
PCT/SE2001/001348 2000-06-30 2001-06-14 Broyeuse WO2002000351A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2001274743A AU2001274743A1 (en) 2000-06-30 2001-06-14 A comminution device
EP01941385A EP1343588A1 (fr) 2000-06-30 2001-06-14 Broyeuse

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0002473A SE516575C2 (sv) 2000-06-30 2000-06-30 Anordning för finfördelning av avfall
SE0002473-7 2000-06-30

Publications (1)

Publication Number Publication Date
WO2002000351A1 true WO2002000351A1 (fr) 2002-01-03

Family

ID=20280321

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/001348 WO2002000351A1 (fr) 2000-06-30 2001-06-14 Broyeuse

Country Status (4)

Country Link
EP (1) EP1343588A1 (fr)
AU (1) AU2001274743A1 (fr)
SE (1) SE516575C2 (fr)
WO (1) WO2002000351A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005039775A1 (fr) 2003-10-22 2005-05-06 Pioneer Waste Management Holdings Trust Pty Limited Traitement de dechets organiques putrescibles
US8544775B2 (en) 2007-05-15 2013-10-01 Pioneer Waste Management Holdings Trust Pty Limited Putrescible organic waste treatment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128210A (en) * 1977-03-24 1978-12-05 Whirlpool Corporation Food waste disposal apparatus
WO1998006497A1 (fr) * 1996-08-12 1998-02-19 Gupta Rajendra P Broyeur centrifuge a bon rendement energetique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128210A (en) * 1977-03-24 1978-12-05 Whirlpool Corporation Food waste disposal apparatus
WO1998006497A1 (fr) * 1996-08-12 1998-02-19 Gupta Rajendra P Broyeur centrifuge a bon rendement energetique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005039775A1 (fr) 2003-10-22 2005-05-06 Pioneer Waste Management Holdings Trust Pty Limited Traitement de dechets organiques putrescibles
EP1684908A4 (fr) * 2003-10-22 2008-11-26 Pioneer Waste Man Holdings Tru Traitement de dechets organiques putrescibles
US8544775B2 (en) 2007-05-15 2013-10-01 Pioneer Waste Management Holdings Trust Pty Limited Putrescible organic waste treatment

Also Published As

Publication number Publication date
SE0002473L (sv) 2001-12-31
SE516575C2 (sv) 2002-01-29
SE0002473D0 (sv) 2000-06-30
AU2001274743A1 (en) 2002-01-08
EP1343588A1 (fr) 2003-09-17

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