CA1045046A - Filter having a truncated conical sieve surface - Google Patents
Filter having a truncated conical sieve surfaceInfo
- Publication number
- CA1045046A CA1045046A CA210,598A CA210598A CA1045046A CA 1045046 A CA1045046 A CA 1045046A CA 210598 A CA210598 A CA 210598A CA 1045046 A CA1045046 A CA 1045046A
- Authority
- CA
- Canada
- Prior art keywords
- spray pipe
- center
- sieve
- sieve surface
- filter
- 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
Links
- 239000007921 spray Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 7
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
Classifications
-
- 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
- B01D29/018—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 ring shaped
-
- 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
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
- B01D29/682—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles 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
- B01D29/94—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 discharging the filter cake, e.g. chutes
- B01D29/945—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 discharging the filter cake, e.g. chutes for continuously discharging concentrated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/02—Filtering elements having a conical form
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nozzles (AREA)
- Combined Means For Separation Of Solids (AREA)
- Filtration Of Liquid (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A filter is disclosed having a truncated conical sieve slanting downwardly from an outer periphery towards a center of the sieve, an outlet for solid impurities at an inner periphery of the sieve, at least one radially extending spray pipe rotatable about the center below the sieve and being generally parallel thereto, and a feed pipe for supplying liquid to the spray pipe. The spray pipe is provided with a plurality of nozzle openings directed at an angle with respect to the longitudinal direction of the spray pipe so that jets of liquid emerg-ing from the nozzle openings hit the lower surface of the sieve at an obtuse angle as viewed from the center of the filter.
A filter is disclosed having a truncated conical sieve slanting downwardly from an outer periphery towards a center of the sieve, an outlet for solid impurities at an inner periphery of the sieve, at least one radially extending spray pipe rotatable about the center below the sieve and being generally parallel thereto, and a feed pipe for supplying liquid to the spray pipe. The spray pipe is provided with a plurality of nozzle openings directed at an angle with respect to the longitudinal direction of the spray pipe so that jets of liquid emerg-ing from the nozzle openings hit the lower surface of the sieve at an obtuse angle as viewed from the center of the filter.
Description
-- 1C)4SQ~L6 The present invention relates to a filter of the type having a truncated conical sieve surface slanting downwardly from an outer periphery towards a center of the sieve surface, in which liquid to be filtered is Eed to the upper side of the sieve surface in the region of the outer periphery and solid impurities are removed at an inner periphery of the sieve surface via an outlet, and under the sieve surface there are one or more radial spray pipes which are generally parallel to the sieve surface and are rotatable at a desired rate about the center together with a liquid feed tu~e at the center.
In such filters the sprays of the spray pipes have been directed perpendicularly to the lower side of the siPve surface.
Owing to the slant o~ the sieve surface and the spray pipes parallel to it, the sprays have thu~ been directed slightly to-wards the center of the ilter. For this reason the solid matter left on the filter surface moves, carried along by the sprays, slowly towards the center and is removed from the filter through the outlet pipe in the center.
An object of the present invention is to improve the -performance of known filters by speeding up the moving of the solid matter towards the center. This is effected according to the invention by directing the nozzle openings of each spray pipe slantingly in relation to the longitudinal direction of the spray pipe so that the sprays merging from them hit the lower surface of the sieve at an obtuse angle, when seen from ;~
the center of the Eilter. For this reason the sprays carry solid matter faster into the outlet, and the filtering efficiency of the filter thereby increases.
According to the present invention there is provided a filter comprising a truncated conical sieve surface which slants -1 ,~ ;:
.
. , , . , ,, ~ .
downwardly from an outer periphery towards a center of the sieve surface, means for feeding liquid to be filtered to the upper side of the sieve surface in the region of said outer periphery, an outlet for solid impurities at an inner periphery of said sieve surface, at least one radially extending spray pipe dis-posed below the sieve surface substantially parallel thereto and rotatable about said center, and means for supplying liquid to said spray pipe, said spray pipe having a plurality of nozzle openings therein each forming such an angle with a longitudinal ;, direction of said spray pipe as to supply a jet of liquid directed towards the lower side of said sieve surface at an obtuse angle as viewed from said center.
An example of an embodiment of the filter according to the invention with reference to the enclosed drawing is given below to illustrate the invention. ~ ' In the drawings: ' Fig. 1 shows schematically a vertical section of a filter according to the invention, and `~
Figs. 2 and 3 show, on a laryer scale, details of spray pipes with, nozzles.
In Fig. 1 of the drawing, 1 refers to a sieve surface which is of the shape of a blunt, truncated cone and made of filter fabric. Its outer periphery adjoins a support 2 and its inner periphery adjoins an outlet 3. Below the filter surface 1 there are spray pipes 4, which are parallel to the filter surface and connected to a feed pipe 5 in the outlet 3. The feed pipe 5 is rotated at a desired rate by a driving mechanism in a manner known per se and not shown in the figure. The drawing shows two spray pipes 4, but a different number can be provided. The spray pipes 4 are provided with nozzle openings in the form of nozzles ~2-. , . ~
1~4584~i attached to them or openings in their walls, as illustrated in more detail in Figs. 2 and 3, directed so that the sprays emerging from them slant towards the center of the filter in the longitudinal direction of the spray pipes and the direction of the sieve surface 1, as indicated by arrows in the drawing.
Fig. 2 shows a part of a spray pipe 4 as a section.
Nozzles 6, provided with nozzle openings 7, are attached in a suitable manner to the wa~ of the spray pipe 4 so that they are directed slantingly towards the center of the filter. A nozzle opening 7 can be either a round opening, which gives a conically diverging spray, or a narrow slit, in which case the spray is flat when seen perpendicularly to the spray pipe and widens like a whisk when seen in the longitudinal direction of the spray pipe.
Fig. 3 also shows a part of the spray pipe as a section.
In this case the nozzle opening 7 is directly in the wall of the spray pipe 4 and slants in the same manner as in Fig. 2. Even '~
in this case a nozzle opening 7 can be either a round opening or a slit. `~
~: .
In such filters the sprays of the spray pipes have been directed perpendicularly to the lower side of the siPve surface.
Owing to the slant o~ the sieve surface and the spray pipes parallel to it, the sprays have thu~ been directed slightly to-wards the center of the ilter. For this reason the solid matter left on the filter surface moves, carried along by the sprays, slowly towards the center and is removed from the filter through the outlet pipe in the center.
An object of the present invention is to improve the -performance of known filters by speeding up the moving of the solid matter towards the center. This is effected according to the invention by directing the nozzle openings of each spray pipe slantingly in relation to the longitudinal direction of the spray pipe so that the sprays merging from them hit the lower surface of the sieve at an obtuse angle, when seen from ;~
the center of the Eilter. For this reason the sprays carry solid matter faster into the outlet, and the filtering efficiency of the filter thereby increases.
According to the present invention there is provided a filter comprising a truncated conical sieve surface which slants -1 ,~ ;:
.
. , , . , ,, ~ .
downwardly from an outer periphery towards a center of the sieve surface, means for feeding liquid to be filtered to the upper side of the sieve surface in the region of said outer periphery, an outlet for solid impurities at an inner periphery of said sieve surface, at least one radially extending spray pipe dis-posed below the sieve surface substantially parallel thereto and rotatable about said center, and means for supplying liquid to said spray pipe, said spray pipe having a plurality of nozzle openings therein each forming such an angle with a longitudinal ;, direction of said spray pipe as to supply a jet of liquid directed towards the lower side of said sieve surface at an obtuse angle as viewed from said center.
An example of an embodiment of the filter according to the invention with reference to the enclosed drawing is given below to illustrate the invention. ~ ' In the drawings: ' Fig. 1 shows schematically a vertical section of a filter according to the invention, and `~
Figs. 2 and 3 show, on a laryer scale, details of spray pipes with, nozzles.
In Fig. 1 of the drawing, 1 refers to a sieve surface which is of the shape of a blunt, truncated cone and made of filter fabric. Its outer periphery adjoins a support 2 and its inner periphery adjoins an outlet 3. Below the filter surface 1 there are spray pipes 4, which are parallel to the filter surface and connected to a feed pipe 5 in the outlet 3. The feed pipe 5 is rotated at a desired rate by a driving mechanism in a manner known per se and not shown in the figure. The drawing shows two spray pipes 4, but a different number can be provided. The spray pipes 4 are provided with nozzle openings in the form of nozzles ~2-. , . ~
1~4584~i attached to them or openings in their walls, as illustrated in more detail in Figs. 2 and 3, directed so that the sprays emerging from them slant towards the center of the filter in the longitudinal direction of the spray pipes and the direction of the sieve surface 1, as indicated by arrows in the drawing.
Fig. 2 shows a part of a spray pipe 4 as a section.
Nozzles 6, provided with nozzle openings 7, are attached in a suitable manner to the wa~ of the spray pipe 4 so that they are directed slantingly towards the center of the filter. A nozzle opening 7 can be either a round opening, which gives a conically diverging spray, or a narrow slit, in which case the spray is flat when seen perpendicularly to the spray pipe and widens like a whisk when seen in the longitudinal direction of the spray pipe.
Fig. 3 also shows a part of the spray pipe as a section.
In this case the nozzle opening 7 is directly in the wall of the spray pipe 4 and slants in the same manner as in Fig. 2. Even '~
in this case a nozzle opening 7 can be either a round opening or a slit. `~
~: .
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A filter comprising a truncated conical surface which slants downwardly from an outer periphery towards a center of the sieve surface, means for feeding liquid to be filtered to the upper side of the sieve surface in the region of said outer periphery, an outlet for solid impurities at an inner periphery of said sieve surface, at least one radially extending spray pipe disposed below the sieve surface substantially parallel thereto and rotatable about said center, and means for supplying liquid to said spray pipe, said spray pipe having a plurality of nozzle openings therein each forming such an angle with a longitudinal direction of said spray pipe as to supply a jet of liquid directed towards the lower side of said sieve surface at an obtuse angle as viewed from said center.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI733302A FI49680C (en) | 1973-10-24 | 1973-10-24 | Device with circular plane filter. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1045046A true CA1045046A (en) | 1978-12-26 |
Family
ID=8508258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA210,598A Expired CA1045046A (en) | 1973-10-24 | 1974-10-02 | Filter having a truncated conical sieve surface |
Country Status (7)
| Country | Link |
|---|---|
| JP (2) | JPS5078961A (en) |
| CA (1) | CA1045046A (en) |
| DE (1) | DE2446746A1 (en) |
| FI (1) | FI49680C (en) |
| FR (1) | FR2248866B1 (en) |
| GB (1) | GB1468738A (en) |
| SE (1) | SE389614B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4412920A (en) * | 1979-11-07 | 1983-11-01 | Bolton Joseph A | Filter with top spray |
| FI69250C (en) * | 1984-04-02 | 1986-01-10 | Aarne Ellilae | PLANFILTER |
| SE465657B (en) * | 1990-02-28 | 1991-10-14 | Filterteknik Bw Ab | SETTING AND DEVICE FOR FILTERING OF PARTICULATE LIQUID |
| US5259955A (en) * | 1991-07-10 | 1993-11-09 | Bolton Joseph A | Vacuum strainer |
| US5425876A (en) * | 1993-10-25 | 1995-06-20 | Claude Laval Corporation | Gravity screen filter with dynamic backwash |
| GB2473866A (en) * | 2009-09-28 | 2011-03-30 | Algoil Ltd | Rotating filter |
| CN102772941A (en) * | 2012-08-17 | 2012-11-14 | 徐州东方传动机械有限公司 | Filter with self-cleaning and anti-blocking functions |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4428202Y1 (en) * | 1966-02-28 | 1969-11-24 |
-
1973
- 1973-10-24 FI FI733302A patent/FI49680C/en active
-
1974
- 1974-09-23 SE SE7411919A patent/SE389614B/en not_active IP Right Cessation
- 1974-10-01 DE DE19742446746 patent/DE2446746A1/en not_active Withdrawn
- 1974-10-02 CA CA210,598A patent/CA1045046A/en not_active Expired
- 1974-10-04 JP JP49115104A patent/JPS5078961A/ja active Pending
- 1974-10-07 GB GB4335574A patent/GB1468738A/en not_active Expired
- 1974-10-16 FR FR7434746A patent/FR2248866B1/fr not_active Expired
-
1979
- 1979-09-19 JP JP1979130888U patent/JPS5553513U/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2248866A1 (en) | 1975-05-23 |
| JPS5078961A (en) | 1975-06-27 |
| FR2248866B1 (en) | 1979-07-27 |
| DE2446746A1 (en) | 1975-04-30 |
| FI49680B (en) | 1975-06-02 |
| FI49680C (en) | 1975-09-10 |
| GB1468738A (en) | 1977-03-30 |
| SE7411919L (en) | 1975-04-25 |
| SE389614B (en) | 1976-11-15 |
| JPS5553513U (en) | 1980-04-10 |
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