GB2150455A - Apparatus for de-watering macerated screenings - Google Patents
Apparatus for de-watering macerated screenings Download PDFInfo
- Publication number
- GB2150455A GB2150455A GB08427899A GB8427899A GB2150455A GB 2150455 A GB2150455 A GB 2150455A GB 08427899 A GB08427899 A GB 08427899A GB 8427899 A GB8427899 A GB 8427899A GB 2150455 A GB2150455 A GB 2150455A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screenings
- screen
- sieve
- watering
- macerated
- 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.)
- Withdrawn
Links
- 238000012216 screening Methods 0.000 title claims abstract description 56
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000011343 solid material Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 description 6
- 241001417527 Pempheridae Species 0.000 description 1
- 238000010276 construction Methods 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
- B30B9/20—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
- B01D29/01—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
- B01D29/03—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 self-supporting
- B01D29/035—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 self-supporting 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
- B01D29/01—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
- B01D29/05—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 supported
-
- 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
- B01D29/6469—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
- B01D29/88—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
- B01D29/906—Special treatment of the feed stream before contacting the filtering element, e.g. cutting
-
- 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
- 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
- B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
- B01D29/445—Bar screens
-
- 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
- B01D29/6492—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 combination of movements with respect to the 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
- B01D29/76—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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention provides an apparatus for de-watering screenings effluent. The effluent is first of all macerated and then is passed over a first screen 16 which is made up of inclined bars. The bulk of the liquid content falls through the screen and the residual solids slide down the screen 16 and onto a second screen which is in the form of a curved sieve 26. Squeeze rollers 36 roll over the screen 26 and squeeze the residual liquid from the screenings. The inclined bars of the first screen 16 are attached to a clamping bar at their top ends and are free at their lower ends where they overhang the edge of the second screen 26. <IMAGE>
Description
SPECIFICATION
Improvements relating to the de-watering of macerated screenings
This invention relates to an improved apparatus and method for the de-watering of macerated screenings.
Macerated screenings arise for example in sewage works where screenings from the raw sewage are passed from a screen to a macerator in which the solid material from the sewage is chopped and reduced to provide so-called "macerated screenings". These are separated from the liquid content by passing the macerated screenings over an inclined screen through which most of the liquid component drains, and the solid screenings remain on the screen.
This invention provides a novel form of apparatus for de-watering macerated screenings, and in accordance with the invention the apparatus comprises a screen for the separation of the screenings and liquid content, followed by a de-watering unit comprising a rotary press in which the separated screenings are pressed against a curved sieve by roller means in order to squeeze the residual water from the screening through the sieve. A scraper or similar blade may be arranged to sweep the dewatered screenings from the curved sieve, and the screenings so displaced can be collected for disposal.
The screen and rotary press unit may be embodied in a single apparatus, and the screen may lie in a flat plane which is inclined so that the screenings will tend to slide down the screen over an edge of the sieve to a position where the screenings meet the travelling roller means which perform the dewatering referred to above. The liquid content of the effluent which passes through the screen can be caught and recirculated or discharged. The rotary press may comprise a rotor assembly which is rotatable about a horizontal axis, and is provided with a plurality of arms each with a spring loaded roller, so that the rollers engage the sieve in turn
The sieve may be approximately semi-circular with the edges lying approximately in the same horizontal plane.The said screen is inclined downwardly from an inlet feed box to an outlet edge which lies adjacent the sieve edge, whilst the other edge of the sieve forms a discharge edge for processed screenings.
The said screen preferably comprises a bar member from which extend a plurality of bars or fingers, the bar member being located at the top edge of the screen, and the fingers at the bottom edge of the screen being free. By constructing the screen in this way, so that the screen fingers are free at the ends, there is no obstruction to the movement of the separated screenings across the screen and over the edge of the sieve, and also if the fingers do become blocked with screenings, then they can be impacted to dislodge the screenings and they will oscillate like springs, ensuring ready dislodgement of the screenings.
The apparatus may be used in conjunction with a conventional macerator which receives the sewage screenings containing the solid material and chops and reduces same to provide macerated screenings which are discharged over the said screen.
The invention also provides a method of dewatering macerated screenings, wherein the macerated screenings are passed over a screen through which the liquid component of the effluent falls, leaving the screenings, the separated screenings being passed directly to a rotary de-watering press comprising a curved sieve on which roll dewatering roller means.
An embodiment of the invention will now be described, by way of example, and with reference to the accompanying drawings, wherein:
Figure 1 is a side elevation of a plant embodying apparatus according to the invention;
Figures 2 and 3 are respectively a side view, and a plan of a screen usable in connection with the apparatus shown in Figure 1; and
Figures 4 - 7 show parts of the screen of Figures 2 and 3; and
Figures 8 and 9 show in side and end views an alternative arrangement for the mounting of the screen fingers.
Referring to the drawings, the apparatus includes a macerator 10 which received sewage screenings containing solid matter, and in the macerator 10 the sewage is macerated which means that it is chopped and discharged so as to provide macerated screenings which are discharged from the macerator outlet 12. The discharge screenings pass over the top edge 14 of a flat screen 16 which is inclined downwardly from said top edge to a bottom edge, and the screen is defined by a plurality of parallel bars or fingers 18 (Figure 3) which at the top ends are connected to a bar member 20 and at the bottom ends are free.This ensures that screenings which are separated from the liquid component of the effluent, which liquid component falls through the screen and is caught in a catching vessel 22 and is discharged by means of a discharge pipe 24, can slide freely down the screen and over the inlet edge of a semi-circular de-watering sieve 26. The bar 20 has slots 22 receiving fingers 18, and a bar 20 and plate 21 are connected to end plates 25, although an alternative bar mounting arrangement is shown in Figures 8 and 9. Associated with the de-watering sieve 26 is a rotor assembly 28 which is rotatable about the horizontal axis 30, and is provided with a plurality of arms 34 each carrying a torsion bar or spring loading pressing rotor 36.As the rotor 28 rotates, so that pressing rollers 36 in turn roll over the inner surface of the sieve 26 and press screenings discharged into the sieve there against, thereby to press water from the screenings and to leave relatively dry solid screenings matter on the sieve screen. The water pressed from the screenings is caught in the catching vessel 22 and is discharged, whilst the relatively dry screenings are swept from the sieve screen 26 by the sweeper blade 38 or the like carried by the rotor, to the discharge edge 40. The dry screenings fall down the discharge chute 42 and are collected for disposal.
In the alternative arrangement for mounting the bars or fingers 20, 18 as shown in Figures 8 and 9, the top ends of the bars or fingers 18 are spot welded as shown at 25 to the supporting channel bar 20.
The combination of the screenings separator screen followed directly by the rotary press is a novel combination in this field of industry, and in accordance with the preferred construction, the screen and rotary press are designed and built as a single apparatus.
Claims (11)
1. Apparatus for de-watering macerated screenings comprising a screen for the separation of the screenings and liquid content, followed by a dewatering unit comprising a rotary press in which the separated screenings are pressed against a curved sieve by roller means in order to squeeze the residual water from the screening through the sieve.
2. Apparatus according to claim 1, wherein a scraper or similar blade is arranged to sweep the de-watered screenings from the curved sieve, and the screenings so displaced can be collected for disposal.
3. Apparatus according to claim 1 or 2, wherein the screen and rotary press unit is embodied in a single apparatus, and the screen lies in a flat plane which is inclined so that the screenings will tend to slide down the screen over an edge of the sieve to a position where the screenings meet the travelling roller means which perform the de-watering.
4. Apparatus according to claim 1, 2 or 3, wherein the rotary press comprises a rotor assembly which is rotatable about a horizontal axis, and is provided with a plurality of arms each with a spring loaded roller, so that the rollers engage the sieve in turn.
5. Apparatus according to claim 4, wherein the sieve is approximately semi-circular with the edges lying approximately in the same horizontal plane.
6. Apparatus according to claim 5, wherein the said screen in inclined downwardly from an inlet feed box to an outlet edge which lies adjacent the sieve edge, whilst the other edge of the sieve forms a discharge edge for processed screenings.
7. Apparatus according to any preceding claim, wherein said screen comprises a bar member from which extend a plurality of fingers, the bar member being located at the top edge of the screen, and the fingers at the bottom edge of the screen being free.
8. Apparatus according to any preceding claim, wherein the apparatus is used in conjunction with a conventional macerator which receives the effluent containing the solid material and chops and reduces same to provide macerated screenings which are discharged over the said screen.
9. Apparatus for de-watering macerated screenings substantially as herein before described with reference to the accompanying drawings.
10. A method of de-watering macerated screenings, wherein the macerated screenings are passed over a screen through which the liquid component of the effluent falls, leaving the screenings, the separated screenings being passed directly to a rotary de-watering press comprising a curved sieve on which roll de-watering roller means.
11. A method of de-watering macerated screenings, substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB838331835A GB8331835D0 (en) | 1983-11-29 | 1983-11-29 | De-watering of macerated screenings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8427899D0 GB8427899D0 (en) | 1984-12-12 |
| GB2150455A true GB2150455A (en) | 1985-07-03 |
Family
ID=10552527
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB838331835A Pending GB8331835D0 (en) | 1983-11-29 | 1983-11-29 | De-watering of macerated screenings |
| GB08427899A Withdrawn GB2150455A (en) | 1983-11-29 | 1984-11-05 | Apparatus for de-watering macerated screenings |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB838331835A Pending GB8331835D0 (en) | 1983-11-29 | 1983-11-29 | De-watering of macerated screenings |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB8331835D0 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2235635A (en) * | 1989-09-06 | 1991-03-13 | Hanford Eng Ltd | Screen separator |
| WO1993024201A1 (en) * | 1992-06-01 | 1993-12-09 | Hydro International Limited | Separating barrier |
| ES2112720A1 (en) * | 1994-06-22 | 1998-04-01 | Pijuan Jaime Clos | Improvements to machines for processing the liquid residue of manure (dung) |
| CN111389067A (en) * | 2020-05-07 | 2020-07-10 | 闫新东 | Waste water treatment device for livestock breeding beef cattle breeding |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113230715B (en) * | 2021-05-08 | 2022-06-21 | 贵州大学 | A kind of chicken coccidia merozoite purification and filtering device |
| CN113370419B (en) * | 2021-08-02 | 2022-04-26 | 浙江优为新材料有限公司 | Hyperbranched resin modified odor-free photocuring pipeline repairing material processing device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1447755A (en) * | 1972-07-11 | 1976-09-02 | Nat Res Dev | Separating apparatus |
| GB1596296A (en) * | 1977-03-31 | 1981-08-26 | Longwood Eng Co Ltd | Apparatus for de-watering slurries |
-
1983
- 1983-11-29 GB GB838331835A patent/GB8331835D0/en active Pending
-
1984
- 1984-11-05 GB GB08427899A patent/GB2150455A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1447755A (en) * | 1972-07-11 | 1976-09-02 | Nat Res Dev | Separating apparatus |
| GB1596296A (en) * | 1977-03-31 | 1981-08-26 | Longwood Eng Co Ltd | Apparatus for de-watering slurries |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2235635A (en) * | 1989-09-06 | 1991-03-13 | Hanford Eng Ltd | Screen separator |
| WO1993024201A1 (en) * | 1992-06-01 | 1993-12-09 | Hydro International Limited | Separating barrier |
| ES2112720A1 (en) * | 1994-06-22 | 1998-04-01 | Pijuan Jaime Clos | Improvements to machines for processing the liquid residue of manure (dung) |
| CN111389067A (en) * | 2020-05-07 | 2020-07-10 | 闫新东 | Waste water treatment device for livestock breeding beef cattle breeding |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8331835D0 (en) | 1984-01-04 |
| GB8427899D0 (en) | 1984-12-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |