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WO1979000512A1 - Appareil pour extraire un liquide d'une matiere - Google Patents

Appareil pour extraire un liquide d'une matiere Download PDF

Info

Publication number
WO1979000512A1
WO1979000512A1 PCT/SE1979/000009 SE7900009W WO7900512A1 WO 1979000512 A1 WO1979000512 A1 WO 1979000512A1 SE 7900009 W SE7900009 W SE 7900009W WO 7900512 A1 WO7900512 A1 WO 7900512A1
Authority
WO
WIPO (PCT)
Prior art keywords
dewatering
zone
filter
pressing
filter members
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.)
Ceased
Application number
PCT/SE1979/000009
Other languages
English (en)
Inventor
H Andersson
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.)
Saeffle Gjuteri & Mekaniska Verkstad AB
Saeffle Gjuteri & Mekaniska Ve
Original Assignee
Saeffle Gjuteri & Mekaniska Verkstad AB
Saeffle Gjuteri & Mekaniska Ve
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
Priority claimed from SE7800445A external-priority patent/SE7800445L/xx
Priority claimed from SE7803698A external-priority patent/SE7803698L/xx
Application filed by Saeffle Gjuteri & Mekaniska Verkstad AB, Saeffle Gjuteri & Mekaniska Ve filed Critical Saeffle Gjuteri & Mekaniska Verkstad AB
Publication of WO1979000512A1 publication Critical patent/WO1979000512A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/24—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using an endless pressing band

Definitions

  • the present invention relates to an apparatus for pressing liquid out of material containing liquid, primarily fibrous suspensions, comprising a screw feeder adapted to feed the material in the axial direction towards a zone where the liquid is pressed out of the material and two converging endless filter members are adapted to be driven round a back and a front breaking roller.
  • a screw feeder adapted to feed the material in the axial direction towards a zone where the liquid is pressed out of the material
  • two converging endless filter members are adapted to be driven round a back and a front breaking roller.
  • a first object of the invention is therefore to provide an apparatus of the kind referred to at the beginning, with which the flow resistance in the dewatering zone can be regulated, while at the same time material is prevented from retreating into the screw thread eve when the flow resistance in the dewatering zone is comparatively high.
  • At least the one filter member is variably adjustable to vary the pressing angle, that is to say the angle between the converging filter members, between 0o and 30o, preferably between 0o and 25o, and that said filter member is adapted to be able to be driven round in its path round the breaking rollers at variable speed, including a speed which is lower than the speed of the dewatered material, with the object of achieving an optimum flow resistance the use of which is rendered possible, even when the flow resistance is high, by means of a worm wheel with such a shape that at least one of its teeth always lies in sealing engagement with the feed screw, in its thead, as a result of which material is prevented from retreating into the thread because of the high flow resistance in the dewatering zone.
  • the filter member may appropiriately comprise a filter cloth with a perforated supporting base.
  • An object of one form of development of the invention is to further improve the possibilities for regulating the flow resistance in the dewatering zone.
  • This can be achieved in that the suspension or other material which is to be dewatered is exposed to ever harder pressing pressure in two or more following, converging filter members.
  • the possibilities are improved for selecting a suitable pressing angle for each suspension.
  • the suspension in an introductory dewatering zone, the suspension can be given a more careful treatment, while a more intensive pressing of the material is first effected in a following zone, which further improves the regulating possibilities.
  • This can also involve lower reject losses. Lower reject lossed can likewise be obtained as a result of the fact that the filter cloth in an introductory dewatering zone is denser than in a later zone.
  • the pressing angle in the first zone may be fixed, while the pressing angle in the final zone is preferably variable. According to an alternative form of embodiment, however, the pressing angle in the introductory stage may likewise be variable.
  • the speed of the filter cloth is different in different dewatering zones.
  • the speed of the filter cloth may be higher in an introductory zone, for example, than in a later zone.
  • the apparatus comprises a plurality of similar, series-coupled filter members, as a result of which the apparatus can be built up of a number of modules, which can reduce the cost of manufacture and stock-keeping considerably.
  • Figure 1 is a vertical longitudinal section through an apparatus according to a firs preferred embodiment of the invention
  • Figure 2 is a horizontal section II-II in Figure 1;
  • FIG 3 is a horizontal section through an apparatus according to another preferred from of embodiment of the invention.
  • only those details have been shown - in certain cases only diagrammatically - which are required for an understanding of the invention, while other details have been omitted so that what is essential may be better emphasized.
  • the apparatus illustrated in Figures 1-2 consists of two main parts, namely a feed part 1 and a dewatering part 2 in a dewatering zone.
  • the feed part 1 and the dewatering part 2 are separated from one another by a partition 3.
  • the feed part 1 comprises a cylindrical feed housing 4 and a feeder screw 5 mounted in this.
  • the feed housing 4 is bounded at the back by an end wall 6.
  • the shaft 7 of the feeder screw extends with a sealing action through the end wall 6 and is mounted in double bearings in a bearing housing 8.
  • the feed part has an inlet 9 for the material which is to be dewatered. In the normal case, this is constituted by a fibre suspension, for which reason this is referred to hereinafter.
  • the inlet 9 comprises a front gable 10 which is set obliquely like the thread pitch of the feeder screw 5.
  • the feed screw 5 has a cylindrical thread 11 with an even pitch with a rounded bottom.
  • a worm housing 12 Disposed under the feeder screw is a worm housing 12 which is tightly fitted to the feed housing 4.
  • the worm housing contains a worm wheel 13 which is mounted with a sealing action in a worm-wheel-chamber 14 in the worm housing 12, so that material cannot pass the worm wheel through the worm housing.
  • the teeth 15 of the worm wheel have a circular cylindrical shape, which is selected so that at least one of the teeth always lies in tight engagement against the feeder screw 5, in its thread 11. By this means, material is prevented from retreating into the thread 11.
  • the feed housing 4 is tightly connected to the partition 3 as well as a stand 16 in the dewatering part 2.
  • the stand 16 constitutes a holder for a reject liquid trough 17 and for two pairs of vertically mounted, standard drilled breaking roller 18a and 18b respectively.
  • the reject liquid trough 17 is covered by a plate 17' which is perforated with a dewatering hole 19.
  • Mounted over the back and frontbreaking rollers 18a and 18b respectively in each pair of breaking rollers is a vertically disposed endless filter cloth or wire 20.
  • the parts of the wire which face on another are supported by a perforated supporting plate 21. All the breaking rollers are rotatable about their respecive axes.
  • Two rubberized rollers 22 are driven via gear wheels 23 and 24 or by other means by means of a change speed gear and a geared motor.
  • the rubberized rollers 22 are pressed against the wires 20 with reference to the back breaking rollers 18a so that the wires 20 are conveyed forwards in the direction of the arrows 25.
  • the speeds of the two wires 20 are equally great but preferably lower than the speed of the dewatered filter cake. By this means, an extra variable flow resistance is created.
  • the back breaker rollers 18a are also adapted to be able to be positively driven by means of a chain drive or correspondingly via the gearwheel 23.
  • Above the vertically disposed wires is a horizontal cover plate 26 which is parallel to the cover 17' of the reject tank 17.
  • An outlet for the dewatered and pressed filter cake is designated by 28 while a pair of blast nozzles for cleaning the wires is designated by 30.
  • the filter members - which consist of the wires 20 with the supporting plates 21 behind them - are arranged so that they converge towards one another in the feed direction of the suspension.
  • the two front breaking rollers 18b can be moved away from and towards one another along a circular line the centre of which coincides with the centre of the axes of the back breaking rollers.
  • slots 29 or corresponding guide means are provided in the cover 17' of the reject-liquid trough 17 and in the cover plate 26.
  • the front breaking rollers 18b are shown brought together to the maximum which gives the maximum flow resistance.
  • the separation of the front breaking rollers 18b is counteracted by restraining members, not shown, which may consist of mechanical springs, for example.
  • the pressing angle ⁇ can be varied in this manner between 0o and 18o.
  • the invention is not, however, restricted to 18o as a maximum pressing angle.
  • the feed part 1 of the apparatus is completely identical with that which is shown in Figures 1-2 and therefore comprises a feed housing 4 with a feeder screw 5, a worm wheel 13 and an inlet 9 for the suspension or other material which is to be dewatered.
  • the feed part 1 is separated by a partition 3 from a dewatering part 200 which comprises two series-coupled dewatering zones 2' an 2''.
  • the dewatering part 200 is connected, in a sealing manner to the partition 3 and like the dewatering part 2 in the apparatus of Figures 1-2 comprises a stand, not shown and a reject liquid trough disposed under a horizontal cover plate 260.
  • the components illustrated in Figure 3 in the introductory zone 2' in the dewatering part 200 comprise a pair of endless wires 20' with perforated supporting plates 21' situated behind them.
  • the drainage hole in the cover plate 260 is designated 19'.
  • Upper and back breaking rollers for the wires 20' are designated by 19a' and 18b' respectively, while a pair of rubberized rollers pressed against the wires 20' are designated by 22' and a pair of driving gearwheels are designated by 23'.
  • An outlet for dewatered filter cake is designated by 28.
  • Disposed between the two dewatering zones 2' and 2' ', more specifically between the back breaking roller 18b' in the first zone 2' and the front breaking roller 18a' in the next zone 2' ' is a pair of guide plates 30 for the partially dewatered material.
  • the pressing angle 06' in the first zone is fixed which means that the back breaking rollers 18b in this zone cannot be displaced.
  • the back breaking roller 18'' in the final zone 2'' can be displaced in the slot 29'' so that the pressing angle ⁇ ' ' in this zone can be varied.
  • the first wires 20' preferably have a smaller size of mesh than the following wires 20 ' '. Furthermore, the speed of the front wires 20' is preferably greater than the speed of the later wires 20' '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Seasonings (AREA)
  • Filtration Of Liquid (AREA)

Abstract

Un appareil servant a extraire un liquide d'une matiere en suspension comprend un dispositif d'alimentation (5) prevu pour alimenter en suspensions une zone d'assechement (2) dans laquelle sont disposes deux dispositifs convergents de filtration sans fin (20, 21) entraines par une paire de cylindres a l'avant et a l'arriere, (18a, 18b). L'angle de compression ((Alpha)) entre les dispositifs de filtration peut varier ainsi que la vitesse des filtres, selon la matiere, afin de provoquer une resistance maximum a l'ecoulement des suspensions. Dans certains cas, cette resistance peut etre tres elevee. Une vis sans fin (13) est prevue pour empecher le retrait de la matiere dans les filets de la vis (11). Selon une forme d'execution, deux zones d'assechement ou plus sont disposees en series l'une apres l'autre, cela dans le but d'obtenir des conditions d'assechement optimales.
PCT/SE1979/000009 1978-01-16 1979-01-15 Appareil pour extraire un liquide d'une matiere Ceased WO1979000512A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE7800445A SE7800445L (sv) 1978-01-16 1978-01-16 Apparat for urpressning av vetska ur vetskehaltiga material
SE7800445 1978-01-16
SE7803698A SE7803698L (sv) 1978-04-03 1978-04-03 Apparat for urpressning av vetska ur vetskehaltiga material

Publications (1)

Publication Number Publication Date
WO1979000512A1 true WO1979000512A1 (fr) 1979-08-09

Family

ID=26656961

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1979/000009 Ceased WO1979000512A1 (fr) 1978-01-16 1979-01-15 Appareil pour extraire un liquide d'une matiere

Country Status (3)

Country Link
FI (1) FI70801C (fr)
NO (1) NO147981C (fr)
WO (1) WO1979000512A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT381472B (de) * 1982-09-16 1986-10-27 Falkner Raimund Schneckenpresse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK30140C (da) * 1920-05-06 1922-08-28 Edgar Thomas Meakin Skruepresse.
FR564835A (fr) * 1921-05-14 1924-01-12 Masch Und Motorenbau G M B H Pressoir à fruits à fonctionnement continu
FR572324A (fr) * 1922-08-16 1924-06-04 Pressoir à raisins et autres fruits
FR1130181A (fr) * 1955-08-22 1957-01-31 Pressoir continu destiné à l'extraction des jus de fruits

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK30140C (da) * 1920-05-06 1922-08-28 Edgar Thomas Meakin Skruepresse.
FR564835A (fr) * 1921-05-14 1924-01-12 Masch Und Motorenbau G M B H Pressoir à fruits à fonctionnement continu
FR572324A (fr) * 1922-08-16 1924-06-04 Pressoir à raisins et autres fruits
FR1130181A (fr) * 1955-08-22 1957-01-31 Pressoir continu destiné à l'extraction des jus de fruits

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT381472B (de) * 1982-09-16 1986-10-27 Falkner Raimund Schneckenpresse

Also Published As

Publication number Publication date
FI70801C (fi) 1986-10-27
FI70801B (fi) 1986-07-18
NO147981B (no) 1983-04-11
FI790098A7 (fi) 1979-07-17
NO790112L (no) 1979-07-17
NO147981C (no) 1983-07-27

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