GB1596296A - Apparatus for de-watering slurries - Google Patents

Apparatus for de-watering slurries Download PDF

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Publication number
GB1596296A
GB1596296A GB13664/77A GB1366477A GB1596296A GB 1596296 A GB1596296 A GB 1596296A GB 13664/77 A GB13664/77 A GB 13664/77A GB 1366477 A GB1366477 A GB 1366477A GB 1596296 A GB1596296 A GB 1596296A
Authority
GB
United Kingdom
Prior art keywords
screen
arms
extension
slurry
shaft
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.)
Expired
Application number
GB13664/77A
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.)
Longwood Engineering Co Ltd
Original Assignee
Longwood Engineering Co Ltd
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 Longwood Engineering Co Ltd filed Critical Longwood Engineering Co Ltd
Priority to GB13664/77A priority Critical patent/GB1596296A/en
Priority to JP2835878A priority patent/JPS53123373A/en
Publication of GB1596296A publication Critical patent/GB1596296A/en
Expired 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
    • B30B9/20—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 rotary pressing members, other than worms or screws, e.g. rollers, rings, discs
    • 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
    • B01D29/01—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 flat filtering elements
    • B01D29/014—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 flat filtering elements with curved filtering elements
    • 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
    • B01D29/50—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 multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—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 multiple filtering elements, characterised by their mutual disposition in parallel connection
    • 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
    • B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
    • B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes 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
    • B01D29/826—Handling the filter cake in the filter for purposes other than for regenerating for drying by compression using rollers
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Treatment Of Sludge (AREA)
  • Combined Means For Separation Of Solids (AREA)

Description

(54) APPARATUS FOR DE-WATERING SLURRIES (71) We, THE LONGWOOD ENGINEERING COMPANY LIMITED, a British Company, of Parkwood Mills, Longwood Huddersfield, HD3 4TP, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:- This invention relates to apparatus for de-watering sewerage, industrial sludges, agricultural slurries and the like, hereinafter referred to as "slurries".
According to the invention, apparatus for de-watering slurry comprises a concave screen perforated to pass fluid, a rotor carrying at least one roller resiliently loaded to roll around and against the screen on rotation of the rotor, there being at the discharge end of the screen an imperforate extension shaped so as to allow the roller to move outwardly and relieve the resilient loading before it leaves the screen extension and a discharge port for the de-watered slurry positioned in the screen or its extension near the junction of the screen and the extension such that any de-watered slurry that comes off the roller and falls onto the screen extension is directed back into the apparatus for further pressing by the roller.
In an embodiment of the invention, the screen extension is continued to meet an end guard wall of the apparatus, the top of the guard wall being higher than the peak of the path traced by the roller on rotation of the rotor.
The above and other features of the invention are illustrated, by way of example, on the accompanying drawings, in which: Fig. 1 is an end elevation of a separator in accordance with the invention; and Fig. 2 is a section on the line II-II of Fig.
1.
The slurry de-watering apparatus or separator is shown by the drawings to consist of a part cylindrical screen 1 that is perforated to allow liquid through from a slurry to be de-watered, the size of the perforations being such that most of the solid matter in the slurry cannot pass through.
Mounted co-axially with the screen 1 is a rotor 2 consisting of a four-armed spider at each end of a shaft 3 spanning the screen 1.
The ends of a diametrically opposed pair of arms 4, 5 both terminate in torsion bushes 6 which each carry a trailing arm 7, 8. A roller 9, 10 is rotatively mounted parallel with the shaft 3 between the outer ends of each of axially opposed pairs of the trailing arms 7 and 8 respectively.
The pairs of spider arms 4 and 5 and the pairs of trailing arms 7 and 8 are dimensioned such that, on rotation of the rotor 2 in a clockwise direction, each roller 9 or 10 meets the screen 1 at its input end 11 and is deflected inwardly against the resilience of the torsion bushes 6 as it is rolled around the screen 1.
The discharge end 12 of the screen 1 has a solid extension 13, mounted at a tangent to the cylindrical part of the screen, that continues to meet an end guard wall 14 of the separator. The screen extension 13 provides a region of progressively increasing radius so that each roller 9, 10, as it rolls along the extension 13, can be controlled to progressively deflect outwardly until the torsion bush 6 is unloaded and roller 9 or 10 is at its outermost extension.
This controlled progressive outward deflection of the rollers on the trailing arms prevents the rollers and arms from suddenly jerking outwardly as the roller leaves the screen which action would scatter any slurry solids adhering to the roller and could produce shocks that might induce fatigue damage in the apparatus. The discharge end wall 14 acts as a guard and is positioned beyond the outermost extension of the rollers and is shown to be higher than the peak (the position of roller 9 in Fig. 2) of the path traced by the rollers about the axial shaft 3.
A central tongue 15 is cut out of the screen extension 13 to leave a discharge port 16 that is shown not to extend over the full width of the screen extension. The tongue 15 is bent outwardly to form a ramp terminating in a lip 17 at the head of a discharge chute 18. As can be seen, the leading edge 19 of the continuing screen extension 13 lies inside the discharge lip 17 so that slurrv solids coming off the rollers 9. 10 after they have passed the port 16 would be directed by the screen extension 13 back onto the perforated part of the screen for repressing.
The other, generally opposed, pair of arms 20. 21 of the rotor spiders each terminate in a brush 22, 23 extending parallel to the shaft 3 between axially opposed pairs of arms. The brushes 22 23 are fixed and the pairs of arms 20 and 21 are of a length so that the brushes can sweep around the screen 1 to coilect de-watered slurry solids left by the rollers and carry them to the discharge port 16.
The apparatus thus far described is the second stage of a two-stage separator of which the first stage consists of another part cylindrical perforate screen 24. Another rotor 25 is mounted co-axially with the screen 24 and consists of a four-armed spider at each end of a shaft 26 spanning the screen 4. Each end of each diametrically opposed pair of arms 27, 28 and 29, 30 terminate in brushes 31, 32. 33 and 34 extending parallel to the shaft 26 between axially opposed pairs of arms. The brushes 31, 32.
33 and 34 are all fixed and the pairs of arms 27. 28 29 and 30 are of a length so that the brushes can sweep slurry from an intake 35 around screen 14 to discharge partially de-u atcred slurry over a weir 36 onto screen 1 for final pressing by rollers 9, 10 and sweeping by brushes 22,23.
Both screens 1 and 24 are located between and enclosed by side guard walls 37 and 38, the end wall 14 and another end wall 39. The intake 35 passes through the lower part of end wall 39 which with a discharge end panel 40. located below the chute 18, and the lower parts of the side walls 37 and 38 define a chamber 41 below the screens for the fluid or filtrate expressed from the slurry.
Rotor 2, mounted on shaft 3, is driven by an electric motor 42 via a gear box 43 and coupling 44. Shaft 26 is connected to shaft 3 by a chain and sprocket drive 45 permitting the two rotors to be driven in synchronism.
Other examples of separator in accordance with the invention may consist only of a single stage, and would be basically similar to the second stage, and would be basically similar to the second stage of the above described apparatus. Also, rotors with more than two rollers, for example four rollers, may be employed in some circumstances and the brushes may be replaced by squeegess or any other resilient strip capable of sweeping de-watered slurry around the screens.
WHAT WE CLAIM IS: 1. Apparatus for de-watering slurry comprising a concave screen perforated to pass fluid, a rotor carrying at least one roller resiliently loaded to roll around and against the screen on rotation of the rotor there being at the discharge end of the screen an imperforate extension shaped so as to allow the roller to move outwardly and relieve the resilient loading before it leaves the screen extension and a discharge port for the dewatered slurry positioned in the screen or its extension near the junction of the screen and the extension such that anv de-watered slurry that comes off the roller and falls onto the screen extension is directed back into the apparatus for further pressing by the rol tier.
2. Apparatus as claimed in Claim 1, characterised in that the screen extension is continued to meet an end guard wall of the apparatus, the top of the guard wall being higher than the peak of the path traced by the roller on rotation of the rotor.
t. Apparatus as claimed in Claim 1 or Claim 2, chaîacterised in that the extension is tangential to the screen to provide a region of progressively increasing radius to allow the roller to move progressively radially outwardly.
4. Apparatus as claimed in any of claims I to 3, cliaracterised in that a tongue is cut out of the screen extension to form the discharge port, the tongue being bent outwardly to form a ramp terminating in a lip that lies outside the leading edge of the screen extension continuing past the discharge port.
5. Apparatus as claimed in any of the previous claims, characterised in that the rotor comprises a spider at each end of a shaft spanning the screen, the ends of a diametrically opposed pair of arms both terminating in torsion bushes each carrying a trailing arm, a roller being rotatably mounted parallel with the shaft between the outer ends of each of axially opposed pairs of the trailing arms.
6. Apparatus as claimed in Claim 5.
characterised in that the spiders are fourarmed, the other opposed pairs of arms of which each terminate in a brush extending parallel to the shaft between axially opposed pairs of arms.
7. Apparatus for de-watering slurry substantially as described with reference to and as shown by the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (7)

**WARNING** start of CLMS field may overlap end of DESC **. 13 lies inside the discharge lip 17 so that slurrv solids coming off the rollers 9. 10 after they have passed the port 16 would be directed by the screen extension 13 back onto the perforated part of the screen for repressing. The other, generally opposed, pair of arms 20. 21 of the rotor spiders each terminate in a brush 22, 23 extending parallel to the shaft 3 between axially opposed pairs of arms. The brushes 22 23 are fixed and the pairs of arms 20 and 21 are of a length so that the brushes can sweep around the screen 1 to coilect de-watered slurry solids left by the rollers and carry them to the discharge port 16. The apparatus thus far described is the second stage of a two-stage separator of which the first stage consists of another part cylindrical perforate screen 24. Another rotor 25 is mounted co-axially with the screen 24 and consists of a four-armed spider at each end of a shaft 26 spanning the screen 4. Each end of each diametrically opposed pair of arms 27, 28 and 29, 30 terminate in brushes 31, 32. 33 and 34 extending parallel to the shaft 26 between axially opposed pairs of arms. The brushes 31, 32. 33 and 34 are all fixed and the pairs of arms 27. 28 29 and 30 are of a length so that the brushes can sweep slurry from an intake 35 around screen 14 to discharge partially de-u atcred slurry over a weir 36 onto screen
1 for final pressing by rollers 9, 10 and sweeping by brushes 22,23.
Both screens 1 and 24 are located between and enclosed by side guard walls 37 and 38, the end wall 14 and another end wall 39. The intake 35 passes through the lower part of end wall 39 which with a discharge end panel 40. located below the chute 18, and the lower parts of the side walls 37 and 38 define a chamber 41 below the screens for the fluid or filtrate expressed from the slurry.
Rotor 2, mounted on shaft 3, is driven by an electric motor 42 via a gear box 43 and coupling 44. Shaft 26 is connected to shaft 3 by a chain and sprocket drive 45 permitting the two rotors to be driven in synchronism.
Other examples of separator in accordance with the invention may consist only of a single stage, and would be basically similar to the second stage, and would be basically similar to the second stage of the above described apparatus. Also, rotors with more than two rollers, for example four rollers, may be employed in some circumstances and the brushes may be replaced by squeegess or any other resilient strip capable of sweeping de-watered slurry around the screens.
WHAT WE CLAIM IS: 1. Apparatus for de-watering slurry comprising a concave screen perforated to pass fluid, a rotor carrying at least one roller resiliently loaded to roll around and against the screen on rotation of the rotor there being at the discharge end of the screen an imperforate extension shaped so as to allow the roller to move outwardly and relieve the resilient loading before it leaves the screen extension and a discharge port for the dewatered slurry positioned in the screen or its extension near the junction of the screen and the extension such that anv de-watered slurry that comes off the roller and falls onto the screen extension is directed back into the apparatus for further pressing by the rol tier.
2. Apparatus as claimed in Claim 1, characterised in that the screen extension is continued to meet an end guard wall of the apparatus, the top of the guard wall being higher than the peak of the path traced by the roller on rotation of the rotor.
t. Apparatus as claimed in Claim 1 or Claim 2, chaîacterised in that the extension is tangential to the screen to provide a region of progressively increasing radius to allow the roller to move progressively radially outwardly.
4. Apparatus as claimed in any of claims I to 3, cliaracterised in that a tongue is cut out of the screen extension to form the discharge port, the tongue being bent outwardly to form a ramp terminating in a lip that lies outside the leading edge of the screen extension continuing past the discharge port.
5. Apparatus as claimed in any of the previous claims, characterised in that the rotor comprises a spider at each end of a shaft spanning the screen, the ends of a diametrically opposed pair of arms both terminating in torsion bushes each carrying a trailing arm, a roller being rotatably mounted parallel with the shaft between the outer ends of each of axially opposed pairs of the trailing arms.
6. Apparatus as claimed in Claim 5.
characterised in that the spiders are fourarmed, the other opposed pairs of arms of which each terminate in a brush extending parallel to the shaft between axially opposed pairs of arms.
7. Apparatus for de-watering slurry substantially as described with reference to and as shown by the accompanying drawings.
GB13664/77A 1977-03-31 1977-03-31 Apparatus for de-watering slurries Expired GB1596296A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB13664/77A GB1596296A (en) 1977-03-31 1977-03-31 Apparatus for de-watering slurries
JP2835878A JPS53123373A (en) 1977-03-31 1978-03-14 Slurry dehydration apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13664/77A GB1596296A (en) 1977-03-31 1977-03-31 Apparatus for de-watering slurries

Publications (1)

Publication Number Publication Date
GB1596296A true GB1596296A (en) 1981-08-26

Family

ID=10027164

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13664/77A Expired GB1596296A (en) 1977-03-31 1977-03-31 Apparatus for de-watering slurries

Country Status (2)

Country Link
JP (1) JPS53123373A (en)
GB (1) GB1596296A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150455A (en) * 1983-11-29 1985-07-03 Longwood Engineering Company L Apparatus for de-watering macerated screenings
FR2573343A1 (en) * 1984-11-16 1986-05-23 Demoisy Centrifugal press
GB2235635A (en) * 1989-09-06 1991-03-13 Hanford Eng Ltd Screen separator
GB2270010A (en) * 1992-08-28 1994-03-02 Pollution Control Engineering Filtration apparatus
ES2112720A1 (en) * 1994-06-22 1998-04-01 Pijuan Jaime Clos Improvements to machines for processing the liquid residue of manure (dung)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2150455A (en) * 1983-11-29 1985-07-03 Longwood Engineering Company L Apparatus for de-watering macerated screenings
FR2573343A1 (en) * 1984-11-16 1986-05-23 Demoisy Centrifugal press
GB2235635A (en) * 1989-09-06 1991-03-13 Hanford Eng Ltd Screen separator
GB2270010A (en) * 1992-08-28 1994-03-02 Pollution Control Engineering Filtration apparatus
ES2112720A1 (en) * 1994-06-22 1998-04-01 Pijuan Jaime Clos Improvements to machines for processing the liquid residue of manure (dung)

Also Published As

Publication number Publication date
JPS611165B2 (en) 1986-01-14
JPS53123373A (en) 1978-10-27

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee