NO771943L - PROCEDURES FOR SORTING A SUSPENSION AND SORTING DEVICE FOR CARRYING OUT PROCEDURES - Google Patents
PROCEDURES FOR SORTING A SUSPENSION AND SORTING DEVICE FOR CARRYING OUT PROCEDURESInfo
- Publication number
- NO771943L NO771943L NO771943A NO771943A NO771943L NO 771943 L NO771943 L NO 771943L NO 771943 A NO771943 A NO 771943A NO 771943 A NO771943 A NO 771943A NO 771943 L NO771943 L NO 771943L
- Authority
- NO
- Norway
- Prior art keywords
- suspension
- sieve
- sorting
- sieve drum
- pressure difference
- Prior art date
Links
- 239000000725 suspension Substances 0.000 title claims description 16
- 238000000034 method Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims 2
- 239000000463 material Substances 0.000 claims 1
- 210000000056 organ Anatomy 0.000 claims 1
- 230000010349 pulsation Effects 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/023—Stationary screen-drums
- D21D5/026—Stationary screen-drums with rotating cleaning foils
-
- 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
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- 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
- B01D29/86—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
-
- 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
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
- B01D29/908—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding provoking a tangential stream
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
-
- 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
- B01D2201/287—Filtering elements with a vertical or inclined rotation or symmetry axis
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Sorting Of Articles (AREA)
Description
Oppfinnelsen angår en fremgangsmåte til å sortere en suspensjon, særlig en massesuspensjon; ved innmatning av suspensjonen til den ene side av et silorgan og fjernelse av rejektfraksjon eller fortykket suspensjon fra samme side av silorganet og akseptfraksjon eller væske fra silorganets motsatte side, samtidig som i det minste den ene overflate av silorganet avstrykes med en eller flere vinger og det tilstrebes å holde trykkforskjellen over silorganet innen fastlagte grenser. Oppfinnelsen går også The invention relates to a method for sorting a suspension, in particular a mass suspension; by feeding the suspension to one side of a sieve element and removing reject fraction or thickened suspension from the same side of the sieve element and acceptance fraction or liquid from the opposite side of the sieve element, at the same time that at least one surface of the sieve element is wiped with one or more wings and the efforts are made to keep the pressure difference across the strainer within established limits. The invention also works
ut på en sorteringsanordning til utførelse av fremgangsmåten. out on a sorting device for carrying out the method.
Der er tidligere kjent sorteringsanordninger som er forsynt med siltromler, og hvor massesuspensjonen som skal sorteres, tvinges gjennom silhull av bestemt størrelse, så den aksepterte masse går gjennom trommelen og den vrakede masse ikke gjør det. For at siltrommelen ikke skal tilstoppes, er den forsynt med rote-rende vinger som forårsaker hydrauliske pulser som løsgjør den masse som leirer seg på overflaten av siltrommelen. Vingene er ofte skråttstilt i forhold til siltrommelens lengdeakse for at rejektmassen bedre skal bevege seg i ønsket retning mot den der-til bestemte utløpsåpning.. Sorting devices are previously known which are equipped with sieve drums, and where the pulp suspension to be sorted is forced through sieve holes of a certain size, so that the accepted pulp passes through the drum and the scrapped pulp does not. So that the sieve drum is not clogged, it is equipped with rotating vanes which cause hydraulic pulses which loosen the mass that settles on the surface of the sieve drum. The wings are often inclined in relation to the longitudinal axis of the sieve drum so that the reject mass moves better in the desired direction towards the designated outlet opening.
I praksis danner massesuspensjonen på silperføreringen etfiltrerende nett, som i virkeligheten utfører den egentlige sortering. Dette filtrerende nett oppløses eller fjernes intermit-terende ved hjelp av de nevnte vinger. Tykkelsen av det filtrerende fibernett og dermed sorteringen kan påvirkes ved siltrommelens perforering og ved. avstrykningsvingenes form og rotasjonshastighet. In practice, the mass suspension on the sieve guide forms a filtering net, which in reality carries out the actual sorting. This filtering net is dissolved or removed intermittently with the help of the aforementioned wings. The thickness of the filtering fiber net and thus the sorting can be affected by the perforation of the sieve drum and wood. the shape and speed of rotation of the wiper blades.
Ved vanlige sorteringsanordninger er vingenes rotasjonshastighet alltid noe høyere enn hva som skal til for at sorterings anordningens driftssikkhet skal opprettholdes. Dette innebærer tap av energi. In the case of normal sorting devices, the rotation speed of the blades is always somewhat higher than what is required for the sorting device's operational reliability to be maintained. This involves a loss of energy.
Hensikten med den foreliggende oppfinnelse er å skaffe en fremgangsmåte og en anordning til sortering av en suspensjon med minst mulig effektforbruk for oppnåelse av et bestemt sorteringsresultat. The purpose of the present invention is to provide a method and a device for sorting a suspension with the least possible power consumption to achieve a specific sorting result.
De hovedsakelige kjennetegn for oppfinnelsen fremgår av patentkrav 1. The main characteristics of the invention appear in patent claim 1.
Når prosessbetingelsene holdes konstante, fremgår fibernet-tets filtreringsegenskaper best av trykkforskjellen over siltrommelen. Når det filtrerende fiberskikt tiltar i tykkelse, øker trykkforskjellen, og når fiberskiktet igjen blir tynnere, avtar også trykkforskjellen. På tilsvarende måte gjør en økning av av-strykningsorganenes rotasjonshastighet fibernettet tynnere (bryter det ned) og en senkning av rotasjonshastigheten gjør nettet tyk-kere. Ifølge oppfinnelsen blir der for hver massetype, strømning og lignende valgt en optimal trykkforskjell over siltrommelen. Denne trykkforskjell holdes konstant ved regulering av avstryk-ningsorganenes rotasjonshastighet. When the process conditions are kept constant, the fiber net's filtering properties are best shown by the pressure difference across the sieve drum. When the filtering fiber layer increases in thickness, the pressure difference increases, and when the fiber layer becomes thinner again, the pressure difference also decreases. In a similar way, an increase in the rotation speed of the wiping means makes the fiber net thinner (breaks it down) and a decrease in the rotation speed makes the net thicker. According to the invention, an optimal pressure difference across the sieve drum is selected for each mass type, flow and the like. This pressure difference is kept constant by regulating the rotation speed of the wiping devices.
Oppfinnelsen vil i det følgende bli belyst nærmere under hen-visning til tegningen, som viser en sorteringsanordning bestemt for utførelse av fremgangsmåten ifølge oppfinnelsen, i sideriss The invention will be explained in more detail in the following with reference to the drawing, which shows a sorting device intended for carrying out the method according to the invention, in side view
.og delvis gjennomskåret. .and partially cut through.
Massen som skal sorteres, innmates tangensialt via en inn-løpsåpning li den øvre del av den viste sorteringsanordning. The mass to be sorted is fed in tangentially via an inlet opening in the upper part of the sorting device shown.
Fra sorteringsanordningens øvre del strømmer massen som skal sorteres, nedad gjennom en vertikal siltrommel 2, og godkjent fraksjon eller aksept trer ut av massen gjennom hullene i trommelen 2 til det ringformede rom mellom trommelen og sorteringsanordningens mantel 3, hvorfra den fjernes gjennom én utløpsåpning 4. Den vrakede masse eller rejektet synker ned til sorteringsanordningens bunn, hvor den fjernes gjennom et utløp 5. From the upper part of the sorting device, the mass to be sorted flows downwards through a vertical sieve drum 2, and the approved fraction or acceptance emerges from the mass through the holes in the drum 2 to the annular space between the drum and the sorting device's mantle 3, from where it is removed through one outlet opening 4. The wrecked mass or reject sinks to the bottom of the sorting device, where it is removed through an outlet 5.
Sentralt og koaksialt i siltrommelen 2 er der lagret en aksel 7 som drives av en motor 6, og hvortil der ved armer 8 er festet en rekke vinger 9 som strekker seg skrått fra den ene ende av siltrommelen 2 til den annen og er avpasset for meget nær å avstryke innerflaten av siltrommelen 2 for. løsgjøring av masse som hefter til denne, ved hjelp av hydrauliske pulser. Centrally and coaxially in the sieve drum 2 is stored a shaft 7 which is driven by a motor 6, and to which a series of wings 9 are attached by arms 8 which extend obliquely from one end of the sieve drum 2 to the other and are adapted to close to wiping the inner surface of the sieve drum 2 for. loosening of mass adhering to this, using hydraulic pulses.
Trykket måles på innløpsstedet 1 og utløpsstedet 4, og et instrument 10 angir og registrerer forskjellen mellom innløps- og utløpstrykket. The pressure is measured at the inlet 1 and the outlet 4, and an instrument 10 indicates and records the difference between the inlet and outlet pressure.
I samsvar med denne forskjell blir hastigheten av sortererens motor 6 ved hjelp av et reguleringsorgan 11 regulert slik at om-dreiningstallet for motoren 6 øker hvis trykkforskjellen tiltar ut over en bestemt tillatt verdi, og minker hvis trykkforskjellen avtar under en bestemt tillatt verdi. In accordance with this difference, the speed of the sorter's motor 6 is regulated by means of a regulating device 11 so that the speed of the motor 6 increases if the pressure difference increases above a certain permitted value, and decreases if the pressure difference decreases below a certain permitted value.
Sorteringsanordningen vil således alltid forbruke minst mulig effekt for oppnåelse av et bestemt ønsket sorteringsresultat. The sorting device will thus always consume the least possible power to achieve a certain desired sorting result.
I henhold til en alternativ utførelsesform for oppfinnelsen er der anbragt vinger såvel på innsiden som på utsiden av siltrommelen, og de vinger som avstryker siltrommelens innerflate, blir da hensiktsmessig innrettet til å rotere i retning motsatt av de vinger som avstryker ytterflaten. According to an alternative embodiment of the invention, wings are placed both on the inside and on the outside of the sieve drum, and the wings which wipe the inner surface of the sieve drum are then suitably arranged to rotate in the opposite direction to the wings which wipe the outer surface.
Videre kan vingene være hule med åpning mot siltrommelen for utmatning av spylevæske mot denne eller for fjernelse av masse som er frigjort fra siltrommelen, gjennom vingene. Furthermore, the wings can be hollow with an opening towards the sieve drum for the discharge of flushing liquid towards this or for the removal of mass which has been released from the sieve drum, through the wings.
Det vil også være klart at massen som skal sorteres, kan innmates til utsiden av siltrommelen og akseptet fjernes fra dennes innside, eller at vingene kan være stasjonære og siltrommelen holdes i rotasjon av motoren 6. ' It will also be clear that the mass to be sorted can be fed to the outside of the sieve drum and the acceptance removed from its inside, or that the wings can be stationary and the sieve drum kept in rotation by the motor 6.'
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI761578A FI761578A (en) | 1976-06-03 | 1976-06-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
NO771943L true NO771943L (en) | 1977-12-06 |
Family
ID=8510043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO771943A NO771943L (en) | 1976-06-03 | 1977-06-02 | PROCEDURES FOR SORTING A SUSPENSION AND SORTING DEVICE FOR CARRYING OUT PROCEDURES |
Country Status (6)
Country | Link |
---|---|
DE (2) | DE7714388U1 (en) |
FI (1) | FI761578A (en) |
FR (1) | FR2353675A1 (en) |
GB (1) | GB1584715A (en) |
NO (1) | NO771943L (en) |
SE (1) | SE7706390L (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE7901076L (en) * | 1978-11-17 | 1980-05-18 | Nils Anders Lennart Wikdahl | TAKE REMOVING ADHESIVE SILGING FROM A SILVER PLATE IN A FILTER SUSPENSION SYSTEM AND A DEVICE FOR EXERCISING THE SET |
SE8106985L (en) * | 1981-11-24 | 1983-05-25 | Nils Anders Lennart Wikdahl | KEEP PREVENTING THE COMPOSITION OF A SILORGAN IN THE SILVERING OF A FIBER SUSPENSION |
FI20090455A (en) | 2009-11-30 | 2011-05-31 | Andritz Oy | Procedure for the regulation of a silage |
-
1976
- 1976-06-03 FI FI761578A patent/FI761578A/fi not_active Application Discontinuation
-
1977
- 1977-05-06 DE DE19777714388U patent/DE7714388U1/en not_active Expired
- 1977-05-06 DE DE19772720383 patent/DE2720383A1/en active Pending
- 1977-05-31 FR FR7716486A patent/FR2353675A1/en not_active Withdrawn
- 1977-06-01 SE SE7706390A patent/SE7706390L/en unknown
- 1977-06-02 GB GB23446/77A patent/GB1584715A/en not_active Expired
- 1977-06-02 NO NO771943A patent/NO771943L/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR2353675A1 (en) | 1977-12-30 |
GB1584715A (en) | 1981-02-18 |
FI761578A (en) | 1977-12-04 |
DE2720383A1 (en) | 1977-12-08 |
DE7714388U1 (en) | 1978-12-14 |
SE7706390L (en) | 1977-12-04 |
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