CA2025769A1 - Apparatus for dewatering and squeezing material - Google Patents
Apparatus for dewatering and squeezing materialInfo
- Publication number
- CA2025769A1 CA2025769A1 CA002025769A CA2025769A CA2025769A1 CA 2025769 A1 CA2025769 A1 CA 2025769A1 CA 002025769 A CA002025769 A CA 002025769A CA 2025769 A CA2025769 A CA 2025769A CA 2025769 A1 CA2025769 A1 CA 2025769A1
- Authority
- CA
- Canada
- Prior art keywords
- screw
- press
- feed
- section
- trough
- 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.)
- Abandoned
Links
- 239000000463 material Substances 0.000 title claims abstract description 39
- 239000003415 peat Substances 0.000 claims abstract description 3
- 239000010802 sludge Substances 0.000 claims abstract description 3
- 239000000725 suspension Substances 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229920001131 Pulp (paper) Polymers 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 description 9
- 150000002500 ions Chemical class 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- OWNRRUFOJXFKCU-UHFFFAOYSA-N Bromadiolone Chemical compound C=1C=C(C=2C=CC(Br)=CC=2)C=CC=1C(O)CC(C=1C(OC2=CC=CC=C2C=1O)=O)C1=CC=CC=C1 OWNRRUFOJXFKCU-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- UOACKFBJUYNSLK-XRKIENNPSA-N Estradiol Cypionate Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H](C4=CC=C(O)C=C4CC3)CC[C@@]21C)C(=O)CCC1CCCC1 UOACKFBJUYNSLK-XRKIENNPSA-N 0.000 description 1
- 240000001973 Ficus microcarpa Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- HCTVWSOKIJULET-LQDWTQKMSA-M phenoxymethylpenicillin potassium Chemical compound [K+].N([C@H]1[C@H]2SC([C@@H](N2C1=O)C([O-])=O)(C)C)C(=O)COC1=CC=CC=C1 HCTVWSOKIJULET-LQDWTQKMSA-M 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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
- B30B9/12—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 pressing worms or screws co-operating with a permeable casing
- B30B9/127—Feed means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
- B01D29/118—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration open-ended
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
- B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
- B01D29/80—Handling the filter cake in the filter for purposes other than for regenerating for drying
- B01D29/82—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
- B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
-
- 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
- B30B9/12—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 pressing worms or screws co-operating with a permeable casing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/28—Position of the filtering element
- B01D2201/282—Filtering elements with a horizontal rotation or symmetry axis
Abstract
An apparatus for dewatering and squeezing treatment of material in form of sludge, suspensions, peat, etc, includes as ending treatment part a screw press section (12-14; 28-30) including a press screw (12, 13; 29, 30) and a sieve mantle (14; 28) surrounding the press screw. An out-feed section (7-10) positioned adjacent a dewatering device such as a drum filter, disc filter, bow sieve, etc, is positioned ahead of the screw press section. This out-feed section includes an out-feed screw (8-10) and a trough (7) surrounding this screw. The press screw (12, 13; 29, 30) and the sieve mantle (14; 28) of the screw press section is an extension of said out-feed screw (8-10) and said trough (7), respectively, and are arranged on the same central line. The dewatering device (5, 6) is provided with an inlet (1-3) for the material to be treated and an outlet means, for instance a scraper (21), for supplying the material from the dewatering device (5, 6) to the out-feed section (7-10).
Description
2 ~? ~ J
. )~)()/(J~615 PCT/SE90/OnO31 Ah'~ PARATU~ FOR DE'~'~TrR~;G A~.D SOUE~gI~G ~ T-~I~.L
The present invent~on relates to an apparaus for d~watering and squeezing material in form of sludge, sediment, sus-penfiions such as paper pulp, peat, etc.
Drior art In fabrics 6uch as pulp and paper industries, water cleaning plants etc, applications exi6t were dewatering of suspen~ions takes place f-om dry substances of some tenths procent up to hiahest possible dry content, for instance 40-50~. Such dewatering operations are carried out today usually in one or WO 5 teps.
, 15 For dewaterlng within above mentioned area and in one step wire bænd pres~es, some types of cyllnder pres6es and 80 called sieberdrumpresses are today p.referabely used.
The di5ad~antages with such equipment is that the machines are expensive, require large floor 6pace, are expen6ive ~n maintenance, are sens`itive for operation disturbance6, et-.
For dewatering in said area and in two steps for lnstance different type of filters or drum dewaters are today used for step 1 and usually screw pres9es for ~tep 2. The dewatering in step 1 takes place from actual inlet concentration up to for instance 10-12~ and in ~te.p 2 from this valua up to highest possible concentration.
:~ ~ilters or drum dewaters and screw presses used in this " connection are considerably simple machines and have accor-dingly lowar price, are cheaper ~n maintenance and are machines reliable in running.
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WO~ X~S ~ PCT/SE90/00031 ~he dlsadvantages ~n dewater-ng in two steps and in separate machlnes are, however, above all that the apparatuses must for distribution technical reasons be placed a distance from each other in the fabric meaning that the press material must be transported between the sites of the machines. This results in lncreased costs for the installation, requir0s ', larger building volume, increases the energy requirement for ' the operation, etc, Our Swedish patent No, 870065a-1 ~Publ, No, 456 149) dis-clo6es a scre~ press consisting of a feed screw and sieve , mantle surrounding the feed screw, A faed section ia arranged : ahead of this screw press and this feed section comprises a feed screw and a sieve mantle surrounding this 6crew. Thifi i5 first mentioned feed section is formed for dewatering mainly by self-drainage and the ~ection has a rotating sieve mantle provided with means for cleaning holes in the 6ieve mantle, The Present i~vention The present invention haa a press &ectian principally simular to that de6cribed and shown in our above mentioned Swedish patent, 3eæide this, however, the present invention differs essentially ~rom the apparatus according to said patent.
Moreover, the above mentioned di6advantages have by the present invention been eliminated by providing a unit in which dewatering and squeezing take place in one machine.
Dewatering and squeezing ta~e place in a æimple and operatively reliable construction at the same time as the advantages with a compact dewatering fun-tion is obtained and the need of intermediate transport devices are eliminated.
The characterizing of the invention in order to eliminate the ahove mentioned disadvantages and in order to obtain above 2`~ )v~
W~ )X~ PCT/SE90~00031 .
mentloned adavantage6 i8 that ahead of the screw prese section and ln direct connec~lon to this section lS to a dewaterlng device ln the form of a drumfilter, disc filter, bow sleVe, etc, arranged an out-~eed section connected t.o the dewatering device, said out~feed section including an out-feed 3crew and a trough surroundiny thi~ screw and s~id press ~crew of said screw press section and i~s ~ieve mantle . being an elongation of and being arranged on the same central line as the out-feed screw and trough of the out-feed section, respectivily, and that to the dewatering device arranged adjacent the out-feed section is arranged an inlet for the material to be treated and an outlet device for tranferring the material from the dewatering device to the out-feed flection.
; 15 Summing up, the apparatus according to the invention thus consists of a combined dewatering part and screw pres~ part, the dewatering part consisting of a dewatering device s~lch as a fllter, a drum dewa~ering device, a bow sieve, etc, to ; 20 which is connected an out-feed screw and the screw press ?art being connected as an elonga~ion to the out-feed screw of the dewatering device.
Such a combination according to the inventlon gives essentual advantage~ which are not predictable when using each machine itself.
Such a~vantages are for instance the foilowing:
- a compact unit resulting in lower investment co~t, : 30 - smaller space requirement, - lower eneryy requirement for the operation ~no intermediate transport devices, etc), - a unit operating with alternatively positive or negative pressure wherein the press part serves as a sealing plug .-.`.
~ .
W~0/~ }~5 ~ J PCT/SE~)0/00031 devlce agalnst the atmospherlc pressure, - slmpler guidlng of a single unit, - infeed to the screw press in axial direction as distln-guished from laterally infeed to a screw press which ; 5 usually requires separate lateral infeed device and such a lateral lnfeed device is not required in the apparatus according to the mention, - the connection according to the lnventlon makes it easier to optimize the operation over the apparatus. For instance, the output of the filter can be increased and thereby lower outgoing concentration from the filter be accepted and instead carried out a more powerful dewatering in the screw press part. In for instance machines placed apart from each other in the fabric such a balance in the operation is lS essentially more complicated to carry out and control.
Above mention and other advantages will be evident from the following description of embodiments of the invention with reference to the acompanying drawings.
Desc~iption of drawinas Fig. 1 is a horisontel view showing a combined apparatus of filter/screw press section.
Fig. 2 shows a section I-I in Fig. l.
Fig, 3 shows a horisontel view in larger scale of another embodiment of an apparatus according to the invention and shows more in detail the outlet part of the out-feed screw ; from the filter and the screw press section connected to this part .
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0/0~5 PCT/SE90/00031 Fig. 4 shows still another embodiment of an apparatus accor-ding to the invention.
Descri~tion of_embodiments The embodiment o~ a filter having outfeed acrew and screw pres~ as shown in Figs. 1 and 2 has a shute 2 for material inlet 1 and a intermediate wall or overflow 3 which delimits ; 10 the shute 2 from a trough 4 in which a drum 5 is immersed.
The drum is covered with a filter cloth 6.
On opposite side o~ the inlet 1 there i~ a trough 7 ~or receiving the material path 22 formed on the filter cloth 6 lS of the tilter drum 5. A d~vice for disintegration and outfeed of the material path i8 arranged in the trough 7. This device consists of a ~crew core 8, thread sections 9 on the core and pins 10 arranged between these sections. Drive means 11 ; arranged for the screw.
In the elongation of the outfeed screw 8 there i5 arranged a device for compre6sion and squeezing of the material. This pres~ section consists of a screw core 12 diverging in the feed direction and a continuous thread helix 13 arranged about the core and surrounded by a perforated sieve cylinder 14. For collecting the water 6queezed out throuyh the sieve cylinder 14 there is arranged a sealing mantle 15 and a connection piece 16 for the di6charged of the squeezed water.
At the material outlet 19 from the press there i3 a reci-procating throttle device 18 by means of which the dry content of the squeezed material can be adjusted. ~he mate-ri~l is collected in a shaft 17 and falls downwardly for further transport. ~aarings for the screw cores 8 and 12 are de:ign~ted with the reference numeral 20.
:
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WO~)0/0~645 PCT/SE90/00031 The water dralnaged off the filter drum 5 lS dlscharged through a fall chute 23 and the material layer 22 for~ed on the drum i~ directed by means of guard board 21 down into the trough 7. Drive means 24 is arranged for driving the filter drum 5. The ~ilter drum i5 journalled in two conventional bearings 25.
De~criation of th~ o~eration of the invention From a pump or level box, etc, the material to be dewatered is fed thraugh the pipe 1 to the chute 2 and further ovsr the overflow 3 to the trough 4.
When the drum 5 rotates, a material layer 22 is depo~it on the filter cloth 6. This layer is scraped off the cloth by the guard board or scraper 21 and falls down-wardly on the screw 8-10 in the chute 7. ~y the fact that preferably tha peripherical speed of the Rcrew 8-10 is higher than the speed of the material path, the material path lB disintegrated lnto flake6 in the chute 7.
Upon the rotation of the screw ~-10 the material i5 fed forwardly in the screw towards the extension where the press section i8 arranged. When the material enterc the pres~
section 12-14 compression takes place due to the diverging screw core 12 and the successiVly decreasing volume per pitch in the feed direction. Tha water squeezed out fram the mate-rial i5 collected in the cylindrical mantle 15 and is dis-charged out through the connection piece 16.
An adjustment of the dry content of the outgoing material takes place at the outlet 19 by mean~ of the reciprocating -~ - throttle device 18. Thereafter the material falls down-wardly into the shaft 17 for further transport.
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PCI`/SE90/0003 1 In the aDpl-catlon of the lnvention many dlvergencles can be made from the embodlment described above in examplefying purposes.
For instance, instead of a dewatering device including a drum surroundins by a sieve cloth (60 called drum filter) a de-watering device can be used lncludlng several la~erally posi~ioned cloth-covered discs ~so called disc ilter). Also a dewatering device of the type bow sieve with acompanying feed screw havlng a press device at its outlet part is lncluded in the invention.
The invention can also for instance be made as shown in ~is.
. )~)()/(J~615 PCT/SE90/OnO31 Ah'~ PARATU~ FOR DE'~'~TrR~;G A~.D SOUE~gI~G ~ T-~I~.L
The present invent~on relates to an apparaus for d~watering and squeezing material in form of sludge, sediment, sus-penfiions such as paper pulp, peat, etc.
Drior art In fabrics 6uch as pulp and paper industries, water cleaning plants etc, applications exi6t were dewatering of suspen~ions takes place f-om dry substances of some tenths procent up to hiahest possible dry content, for instance 40-50~. Such dewatering operations are carried out today usually in one or WO 5 teps.
, 15 For dewaterlng within above mentioned area and in one step wire bænd pres~es, some types of cyllnder pres6es and 80 called sieberdrumpresses are today p.referabely used.
The di5ad~antages with such equipment is that the machines are expensive, require large floor 6pace, are expen6ive ~n maintenance, are sens`itive for operation disturbance6, et-.
For dewatering in said area and in two steps for lnstance different type of filters or drum dewaters are today used for step 1 and usually screw pres9es for ~tep 2. The dewatering in step 1 takes place from actual inlet concentration up to for instance 10-12~ and in ~te.p 2 from this valua up to highest possible concentration.
:~ ~ilters or drum dewaters and screw presses used in this " connection are considerably simple machines and have accor-dingly lowar price, are cheaper ~n maintenance and are machines reliable in running.
..
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;
WO~ X~S ~ PCT/SE90/00031 ~he dlsadvantages ~n dewater-ng in two steps and in separate machlnes are, however, above all that the apparatuses must for distribution technical reasons be placed a distance from each other in the fabric meaning that the press material must be transported between the sites of the machines. This results in lncreased costs for the installation, requir0s ', larger building volume, increases the energy requirement for ' the operation, etc, Our Swedish patent No, 870065a-1 ~Publ, No, 456 149) dis-clo6es a scre~ press consisting of a feed screw and sieve , mantle surrounding the feed screw, A faed section ia arranged : ahead of this screw press and this feed section comprises a feed screw and a sieve mantle surrounding this 6crew. Thifi i5 first mentioned feed section is formed for dewatering mainly by self-drainage and the ~ection has a rotating sieve mantle provided with means for cleaning holes in the 6ieve mantle, The Present i~vention The present invention haa a press &ectian principally simular to that de6cribed and shown in our above mentioned Swedish patent, 3eæide this, however, the present invention differs essentially ~rom the apparatus according to said patent.
Moreover, the above mentioned di6advantages have by the present invention been eliminated by providing a unit in which dewatering and squeezing take place in one machine.
Dewatering and squeezing ta~e place in a æimple and operatively reliable construction at the same time as the advantages with a compact dewatering fun-tion is obtained and the need of intermediate transport devices are eliminated.
The characterizing of the invention in order to eliminate the ahove mentioned disadvantages and in order to obtain above 2`~ )v~
W~ )X~ PCT/SE90~00031 .
mentloned adavantage6 i8 that ahead of the screw prese section and ln direct connec~lon to this section lS to a dewaterlng device ln the form of a drumfilter, disc filter, bow sleVe, etc, arranged an out-~eed section connected t.o the dewatering device, said out~feed section including an out-feed 3crew and a trough surroundiny thi~ screw and s~id press ~crew of said screw press section and i~s ~ieve mantle . being an elongation of and being arranged on the same central line as the out-feed screw and trough of the out-feed section, respectivily, and that to the dewatering device arranged adjacent the out-feed section is arranged an inlet for the material to be treated and an outlet device for tranferring the material from the dewatering device to the out-feed flection.
; 15 Summing up, the apparatus according to the invention thus consists of a combined dewatering part and screw pres~ part, the dewatering part consisting of a dewatering device s~lch as a fllter, a drum dewa~ering device, a bow sieve, etc, to ; 20 which is connected an out-feed screw and the screw press ?art being connected as an elonga~ion to the out-feed screw of the dewatering device.
Such a combination according to the inventlon gives essentual advantage~ which are not predictable when using each machine itself.
Such a~vantages are for instance the foilowing:
- a compact unit resulting in lower investment co~t, : 30 - smaller space requirement, - lower eneryy requirement for the operation ~no intermediate transport devices, etc), - a unit operating with alternatively positive or negative pressure wherein the press part serves as a sealing plug .-.`.
~ .
W~0/~ }~5 ~ J PCT/SE~)0/00031 devlce agalnst the atmospherlc pressure, - slmpler guidlng of a single unit, - infeed to the screw press in axial direction as distln-guished from laterally infeed to a screw press which ; 5 usually requires separate lateral infeed device and such a lateral lnfeed device is not required in the apparatus according to the mention, - the connection according to the lnventlon makes it easier to optimize the operation over the apparatus. For instance, the output of the filter can be increased and thereby lower outgoing concentration from the filter be accepted and instead carried out a more powerful dewatering in the screw press part. In for instance machines placed apart from each other in the fabric such a balance in the operation is lS essentially more complicated to carry out and control.
Above mention and other advantages will be evident from the following description of embodiments of the invention with reference to the acompanying drawings.
Desc~iption of drawinas Fig. 1 is a horisontel view showing a combined apparatus of filter/screw press section.
Fig. 2 shows a section I-I in Fig. l.
Fig, 3 shows a horisontel view in larger scale of another embodiment of an apparatus according to the invention and shows more in detail the outlet part of the out-feed screw ; from the filter and the screw press section connected to this part .
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0/0~5 PCT/SE90/00031 Fig. 4 shows still another embodiment of an apparatus accor-ding to the invention.
Descri~tion of_embodiments The embodiment o~ a filter having outfeed acrew and screw pres~ as shown in Figs. 1 and 2 has a shute 2 for material inlet 1 and a intermediate wall or overflow 3 which delimits ; 10 the shute 2 from a trough 4 in which a drum 5 is immersed.
The drum is covered with a filter cloth 6.
On opposite side o~ the inlet 1 there i~ a trough 7 ~or receiving the material path 22 formed on the filter cloth 6 lS of the tilter drum 5. A d~vice for disintegration and outfeed of the material path i8 arranged in the trough 7. This device consists of a ~crew core 8, thread sections 9 on the core and pins 10 arranged between these sections. Drive means 11 ; arranged for the screw.
In the elongation of the outfeed screw 8 there i5 arranged a device for compre6sion and squeezing of the material. This pres~ section consists of a screw core 12 diverging in the feed direction and a continuous thread helix 13 arranged about the core and surrounded by a perforated sieve cylinder 14. For collecting the water 6queezed out throuyh the sieve cylinder 14 there is arranged a sealing mantle 15 and a connection piece 16 for the di6charged of the squeezed water.
At the material outlet 19 from the press there i3 a reci-procating throttle device 18 by means of which the dry content of the squeezed material can be adjusted. ~he mate-ri~l is collected in a shaft 17 and falls downwardly for further transport. ~aarings for the screw cores 8 and 12 are de:ign~ted with the reference numeral 20.
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WO~)0/0~645 PCT/SE90/00031 The water dralnaged off the filter drum 5 lS dlscharged through a fall chute 23 and the material layer 22 for~ed on the drum i~ directed by means of guard board 21 down into the trough 7. Drive means 24 is arranged for driving the filter drum 5. The ~ilter drum i5 journalled in two conventional bearings 25.
De~criation of th~ o~eration of the invention From a pump or level box, etc, the material to be dewatered is fed thraugh the pipe 1 to the chute 2 and further ovsr the overflow 3 to the trough 4.
When the drum 5 rotates, a material layer 22 is depo~it on the filter cloth 6. This layer is scraped off the cloth by the guard board or scraper 21 and falls down-wardly on the screw 8-10 in the chute 7. ~y the fact that preferably tha peripherical speed of the Rcrew 8-10 is higher than the speed of the material path, the material path lB disintegrated lnto flake6 in the chute 7.
Upon the rotation of the screw ~-10 the material i5 fed forwardly in the screw towards the extension where the press section i8 arranged. When the material enterc the pres~
section 12-14 compression takes place due to the diverging screw core 12 and the successiVly decreasing volume per pitch in the feed direction. Tha water squeezed out fram the mate-rial i5 collected in the cylindrical mantle 15 and is dis-charged out through the connection piece 16.
An adjustment of the dry content of the outgoing material takes place at the outlet 19 by mean~ of the reciprocating -~ - throttle device 18. Thereafter the material falls down-wardly into the shaft 17 for further transport.
-., ~ ~ .
`'~, 2~.J J; . ~
PCI`/SE90/0003 1 In the aDpl-catlon of the lnvention many dlvergencles can be made from the embodlment described above in examplefying purposes.
For instance, instead of a dewatering device including a drum surroundins by a sieve cloth (60 called drum filter) a de-watering device can be used lncludlng several la~erally posi~ioned cloth-covered discs ~so called disc ilter). Also a dewatering device of the type bow sieve with acompanying feed screw havlng a press device at its outlet part is lncluded in the invention.
The invention can also for instance be made as shown in ~is.
3. With press material which are different to dewater it can be necessary that the maintenance time for the press material ~8 prolonged in the screw press sectlon Under the basic idea of the lnvention the screw press sectlon can for instance be formed with larger diameter than the feed screw par', whereln preferably the feed screw and the press screw, respectively, are driven with different rotation speed. In the embodim~nt shown in Fig. 3 the end part for a trough 26 and the screw core for a feed screw 27 diverge to be adapted to an in-creased diameter for a sieve tube 28 and screw core ~0 with press screw 29, respectively. A usefu! cone angle ~7 can be within the area 0-60 and preferabely within the area 5-15.
ln order to be able to drive the press screw and the feed : 30 screw, respecively, with different rotation speeds in this embodiment, the feed screw is provided with a pin 31 which iY
journalled in bearing 32 in the press screw. A separate drive of the press screw takes place by means of a drive means 33 .
~ . ~
.: ~
,, , W~/OX~S ~r~,~v .~ PCT~SE90/00031 Another embodlment of the lnventlon lS shown ln Figs. 4a and ~b. In this embodlment the dewatering devlce and the feed screw are provided with ~ sealing cap 3~ whereby the appara-tus can be operated under positivs pressure and negative pressure, respectlvely. Such an arrangment makes the depoErit and the dewatering of the material 22 on the sieve cloth 6 more effected.
In such an embodiment the screw press section 12-15 also I0 serves as gate valve when the material during the pres6 process ls compressed, forma a seallng plug and is fed out from positive pressure o negative pressure to atmospheric pressure at ?5. Dewater squee~ed from the material is passed from the gate to atmospharic pressure through a valve means 36.
In these embodiment several essential advantages when using the present invention are obtained. Thus, the out coming dry content of the material and/or the productlons of the unit can be increased and furthermore the built-in screw press function replaces an otherwise necessary extra gate ~eeder which is both a complex and expansive equipment, A problem which could exist particularly in the embodiment shown in Fig. 3 is that the material path 22 runs o~ on the sector surrounding drum 5 resulting in that a larger amount material i5 temporarily forced down into the feed screw part 8-10 and thereby could cause temporary overload in the following screw press section 29, 30.
;: 3~
Such a problem can, however, in i simple way be Erolved by maki~g the drive means 11 for the feed screw 8-lO with variable rota'ion speed which is governed by the power required for the operation of the feed screw.
`
.
, .. .
.
2 ~
' J ~ 5 PCT/SE9~/00031 When ~ larger amount of materlal than normally falls down lnto the faed screw, the power requirement increa~es in propotion to the lncreased amount At the same time, a t~me delay naturally exists before new material is supplied from the drum to the feed screw ~he guidence can, according to the above, function in such a way that the rotatlon speed of the feed screw is reduced when the power required for the feed screw lncreases and that the rotation speed returns to normal value when the power requi-rernent again decreases Required time delays for respective functions can be varied within the frame for the operation conditions Such ~ guidance function is Or course also possible to carry out in such a way that the rotation speed for the feed screw 8-10 is governed according to corresponding principles of the power requirement for the press part 29, 30 ., :~`
.:
.,
ln order to be able to drive the press screw and the feed : 30 screw, respecively, with different rotation speeds in this embodiment, the feed screw is provided with a pin 31 which iY
journalled in bearing 32 in the press screw. A separate drive of the press screw takes place by means of a drive means 33 .
~ . ~
.: ~
,, , W~/OX~S ~r~,~v .~ PCT~SE90/00031 Another embodlment of the lnventlon lS shown ln Figs. 4a and ~b. In this embodlment the dewatering devlce and the feed screw are provided with ~ sealing cap 3~ whereby the appara-tus can be operated under positivs pressure and negative pressure, respectlvely. Such an arrangment makes the depoErit and the dewatering of the material 22 on the sieve cloth 6 more effected.
In such an embodiment the screw press section 12-15 also I0 serves as gate valve when the material during the pres6 process ls compressed, forma a seallng plug and is fed out from positive pressure o negative pressure to atmospheric pressure at ?5. Dewater squee~ed from the material is passed from the gate to atmospharic pressure through a valve means 36.
In these embodiment several essential advantages when using the present invention are obtained. Thus, the out coming dry content of the material and/or the productlons of the unit can be increased and furthermore the built-in screw press function replaces an otherwise necessary extra gate ~eeder which is both a complex and expansive equipment, A problem which could exist particularly in the embodiment shown in Fig. 3 is that the material path 22 runs o~ on the sector surrounding drum 5 resulting in that a larger amount material i5 temporarily forced down into the feed screw part 8-10 and thereby could cause temporary overload in the following screw press section 29, 30.
;: 3~
Such a problem can, however, in i simple way be Erolved by maki~g the drive means 11 for the feed screw 8-lO with variable rota'ion speed which is governed by the power required for the operation of the feed screw.
`
.
, .. .
.
2 ~
' J ~ 5 PCT/SE9~/00031 When ~ larger amount of materlal than normally falls down lnto the faed screw, the power requirement increa~es in propotion to the lncreased amount At the same time, a t~me delay naturally exists before new material is supplied from the drum to the feed screw ~he guidence can, according to the above, function in such a way that the rotatlon speed of the feed screw is reduced when the power required for the feed screw lncreases and that the rotation speed returns to normal value when the power requi-rernent again decreases Required time delays for respective functions can be varied within the frame for the operation conditions Such ~ guidance function is Or course also possible to carry out in such a way that the rotation speed for the feed screw 8-10 is governed according to corresponding principles of the power requirement for the press part 29, 30 ., :~`
.:
.,
Claims (10)
1. An apparatus for dewartering and squeezing treatment of material in form of sludge, sediment, suspensions such as paper pulp, peat, etc., which apparatus is ended by a screw press section (12-14;28-30), from which dewatered and squeezed material is discharged through an outlet (19;35) and squeezed water is discharged through an outlet (16;36), and which includes a press screw (12,13;29,30) and a sieve mantle (14;28) surrounding the press screw, c h a r a c t e r i -z e d in that ahead of the screw press section (12-14;23-30) and in direct connection to this section is to a dewatering device (5,6) in form of a drum filter, disc filter, bow sieve, etc, arranged an out-feed section (7-10) connected to the dewatering device (5,6), said out-feed section (7-10) including an out-feed screw (8-10) and a trough (7) sur-rounding this screw and said press screw (12,13;29,30) of said screw press section (12-14;28-30) and its sieve mantle (14;28) being an elongation of and being arranged on the same central line as the out-feed screw (8-10) and trough (7) of said out-feed section (7-10), and that to the dewatering device (5,6) arranged adjacent the out feed section (7-10) is arranged an inlet (1-3) for the material to be treated and an outlet device (21) for transferring the material from the dewatering device (5,6) to the out-feed section (7-10).
2. An apparatus according to claim 1, c h a r a c t e r i -z e d in that the out-feed screw (8-10) of said out-feed section (7-10) is fixed to the press screw (12,13;29,30) of said screw press section (12-14;28-30).
3. An apparatus according to claim 1, c h a r a c t e r i -z e d in that said out-feed screw (8-10) and said press screw (12,13;29,30) are driven by the same drive means (11).
4. An apparatus according to claim 1, c h a r a c t e r i -z e d in that the out-feed screw (8-10) of said out-feed section (7-10) and the press screw (12,13;29,30) of said press section (12-14;28-30) are journalled in each other for rotation with different rotation speed.
5. A device according to claim 4, c h a r a c t e r i z e d in that said out-feed screw (8-10) and said press screw (12,13;29,30) are driven by separate drive means (11;33).
6. An apparatus according to any of the preceding claims, c h a r a c t e r i z e d in that the sieve mantle (28) of said screw press section (12-14;28-30) and the core (30) of its press screw (29,30), respectively, have at the inlet to the screw press section larger diameter than the trough (7) of said outfeed section (7-10) and the core (8) of its out-feed screw (8-10), respectively, and that the transition between said trough (7) and sieve mantle (28) and said cores (8,30), respectively, are cone-shaped,
7. An apparatus according to any of the preceding claims, c h a r a c t e r i z e d in that the out-feed screw (8-10) of said out-feed section (7-10) is driven with a peripherical speed higher than the speed of the material path in the trough (7).
8. An apparatus according to any of the preceding claims, c h a r a c t a r i z e d in means (18-20) at the outlet of said screw press section (12-14;28-30) for controlling the dry content of the discharged material.
9. An apparatus according to any of the preceding claims, c h a r a c t e r i z e d in a cap (34) surrounding the apparatus for operating the apparatus under positive pressure or negative pressure.
10. An apparatus according to any of the claims 3-9, c h a r a c t e r i z e d in means for guiding the rotation speed of said out-feed screw (8-10) independent of the power required for said out-feed screw (8-10) or said press screw (12,13;29,30).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8900235-6 | 1989-01-24 | ||
| SE8900235A SE462744B (en) | 1989-01-24 | 1989-01-24 | DEVICE FOR DRAINAGE AND PRESSURE TREATMENT OF MATERIALS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2025769A1 true CA2025769A1 (en) | 1990-07-25 |
Family
ID=20374833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002025769A Abandoned CA2025769A1 (en) | 1989-01-24 | 1990-01-15 | Apparatus for dewatering and squeezing material |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0419590A1 (en) |
| JP (1) | JPH04500042A (en) |
| BR (1) | BR9004754A (en) |
| CA (1) | CA2025769A1 (en) |
| SE (1) | SE462744B (en) |
| WO (1) | WO1990008645A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4125565A1 (en) * | 1991-08-02 | 1993-02-04 | Bormet Horst | METHOD AND DEVICE FOR THE TREATMENT OF SCREEN MATERIALS IN CLEANING PLANTS |
| JP2006231260A (en) * | 2005-02-28 | 2006-09-07 | Hitachi Plant Technologies Ltd | Drum screen apparatus |
| CN111135607B (en) * | 2019-12-30 | 2021-10-15 | 霸州嘉明扬科技有限公司 | Environment-friendly oil-water separator |
| CN113577885B (en) * | 2021-08-02 | 2022-06-21 | 南京艾宇琦膜科技有限公司 | Plant protease filtering and rinsing device and implementation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE456149B (en) * | 1987-02-18 | 1988-09-12 | Hedemora Ab | PROCEDURE AND DEVICE FOR DRAINAGE AND PRESSURE OF MATERIALS BY A SCREW PRESSURE |
-
1989
- 1989-01-24 SE SE8900235A patent/SE462744B/en unknown
-
1990
- 1990-01-15 WO PCT/SE1990/000031 patent/WO1990008645A1/en not_active Application Discontinuation
- 1990-01-15 EP EP90902404A patent/EP0419590A1/en not_active Withdrawn
- 1990-01-15 CA CA002025769A patent/CA2025769A1/en not_active Abandoned
- 1990-01-15 BR BR909004754A patent/BR9004754A/en unknown
- 1990-01-15 JP JP2502402A patent/JPH04500042A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SE8900235A (en) | 1989-01-24 |
| SE462744B (en) | 1990-08-27 |
| SE8900235D0 (en) | 1989-01-24 |
| JPH04500042A (en) | 1992-01-09 |
| BR9004754A (en) | 1991-07-30 |
| WO1990008645A1 (en) | 1990-08-09 |
| EP0419590A1 (en) | 1991-04-03 |
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