GB1562736A - Filter press - Google Patents
Filter press Download PDFInfo
- Publication number
- GB1562736A GB1562736A GB5285076A GB5285076A GB1562736A GB 1562736 A GB1562736 A GB 1562736A GB 5285076 A GB5285076 A GB 5285076A GB 5285076 A GB5285076 A GB 5285076A GB 1562736 A GB1562736 A GB 1562736A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filter
- cloths
- plates
- plate
- filter press
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/21—Plate and frame presses
- B01D25/215—Construction of the filter plates, frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/127—Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/28—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating
- B01D25/282—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying
- B01D25/285—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying by compression using inflatable membranes
Description
(54) A FILTER PRESS
(71) We, NIPPON GAISHI KABU
SHIKI KAISHA of No. 2-56, Suda-Cho,
Mizuho-Ku, Nagoya City, Japan and
NORITAKE IRON WORKS CO., LTD. of
No. 16, 2Chome, Izuo-Matsuno-Cho,
Taisho-Ku, Osaka City, Japan, both are companies organized according to the laws of Japan, do hereby declare the invention, for which we pray that a patent may be granted to us, and the product by which it is to be performed, to be particularly described in and by the following state ment :- The present invention relates to a filter press, and more particularly to a filter press adapted to discharge with ease the filter cakes formed during use of the press.
Filter presses provided with slurry feed inlets passing through filter plates and having pairs of filter cloths having openings at positions corresponding to the positions of the said inlets, the periphery of the openings being fixed to the circumfer ences of the feed inlets are known. With such an arrangement, when the filter plates are opened after a pressing operation, the upper portions of the filter cloths open in the form of an inverted V-shape because the upper portions are bound together thereby facilitating the discharge of filter cakes adhered to the upper halves of the filter cloths. However, because the peripheries of the openings of the filter cloths are fixed to the filter plates around the circumferences of the feed inlets, the lower portions of the filter cloths cannot move away from each other but remain parallel to the filter plates, so that it is difficult to discharge the filter cakes adhered to the lower halves of the filter cloths.
The object of the present invention is to provide an improved filter press having filter cloths which are adapted to open into a completely inverted V-shape thereby to facilitate the discharging of the filter cakes from the entire surface of the filter cloths.
Accordingly, the present invention provides a press comprising a plurality of vertically oriented filter press plates, each pair of adjacent filter press plates forming a filter chamber therebetween when the press is in a closed position and the adjacent filter press plates are in close contact with each other, the filter press plates being of two types (a) and (b) arranged in alternating sequence;
each plate (a) having a depending lug housing a feed inlet, the said lug being positioned below the bottom of the plate and outside the filtering area defined by the periphery of the filter chamber, the said feed inlet communicating with the filter chambers on each side of the filter plate by means of channels in the filter plate,
and each plate (b) including a central plate, two diaphragms attached to the periphery of the central plate one on each side thereof by means of a pair of frame members, each frame member having a depending lug housing a feed inlet, the said lug being positioned below the bottom of the frame at a position outside the filtering area defined by the periphery of the filter chamber, the feed inlet on each frame member communicating with the surface of the diaphragm on its side of the filter plate by means of a channel in the frame member,
and pairs of filter cloths arranged between each two adjacent filter plates, the
upper ends of the filter cloths being
connected to each other, each filter cloth
having a depending portion at a position
corresponding to the said depending lugs,
the depending portions of the filter cloths
each having an opening for a correspond
ing feed inlet, the peripheries of the openings
of the filter cloths on either side of each
filter press plate being clamped to the
corresponding feed inlet on the said filter
press plate by means of a pair of annular
bodies whereby when the filter press plates
are separated, upper portions of each of the
said two filter cloths are pulled away from
the filter press plates to separate the whole
of the filtering areas of the cloths from the
filter press plates.
An embodiment of the invention will now
be described, by way of example only, with reference to the accompanying drawings, in which:
Fig. 1 is a side elevation showing a main part of the filter press according to the invention, in which the filter plates are in a closed position;
Fig. 2 is a side elevation of the filter press shown in Fig. 1 in an open position;
Fig. 3 is a sectional view of the filter press taken along the line III--III of Fig. 1; and
Fig. 4 is a sectional view of the filter press taken along the line IV-W of Fig. 3.
For the sake of clarity, the left side and the right side of the filter press as viewed in
Figs. 1, 2 and 4 will be referred to as the "front" and as the "rear" respectively of the filter press.
Referring to the drawings, the filter press according to the invention comprises a plurality of filter plates 100 and 200 arranged alternately, and filter cloths arranged so that a pair of two cloths is placed between each two adjacent filter plates 100 and 200 as shown in Figs. 1 and 2.
Referring to Figs. 3 and 4, the filter plate 100 comprises peripheral ridges 101 along the peripheries on opposite sides for embracing the cloths 300 between the adjacent filter plates, and concave filtrate flow portions 102 surrounded by the peripheral ridges 101 on opposite sides which flow portions are sunk relative to the ridges and whose function is to convey the filtrate, the concave portions 102 being formed with a number of grooves 103 for effectively conveying the filtrate. The filter plate 200 as shown in Fig. 4 mainly comprises a central plate 201, a pair o frame members 202, 203 embracing the peripheries of the central plate 201 on its front and rear sides, and a pair of diaphragms 204, 205, on the front and rear sides of the central plate 201, the peripheries of which are held embraced between the central plate 201 and frame members 202, 203. A pair of insertion members 206, 207 is arranged between the central plate 201 and the diaphragms 204 and 205, respectively, so as to expand the inward portions of the diaphragms 204, 205 in front and rear directions held between the frame members 202, 203 and the central plate 201. The diaphragms 204, 205 are also provided with filtrate flow portions 208 corresponding to the filtrate flow portions 102 of the filter plate 100. An introduction of pressure fluid such as water under pressure into a pressure chamber 209 between the central plate 201 and the diaphragms 204. 205 causes the diaphragms to expand outwardly to press the filter cakes which are produced after a filtration process has been performed.
Referring to Figs. 1, 2 and 3, each of the filter plates 100 and 200 is provided at its upper end on both sides as viewed in Fig. 3 with L-shaped arms 104 or 210 whose upper limbs extend away from each other. Each of the L-shaped arms 104, 210 is provided with springs 105, 106 and 211, 212.
The filter plates 100 (200) are hung on brackets 107 (213) supported by side plates 400 of the filter press and are provided at the lower left and upper right corners with outlets 108 for draining the filtrate which communicate with the grooves 103 of the filter plates 100. Each of the pair of filter cloth hanging rods 301, 302 is arranged symmetrically, one on each side of the filter plate 100 or 200. The filter cloth hanging rod 301 on the front side of the filter plate is hung at its ends by the springs 105 (211) of which upper ends are secured to the
L-shaped arms. Similarly, the filter cloth hanging rod 302 on the rear side of the filter plate is hung at its ends by the springs 106 (212). Adjacent cloth hanging rods 302 and 301 are connected to each other by means of connecting means such as chains 303, so that when the filter plates 100 and 200 move away from each other, the hanging rods 302 and 301 are pulled upwardly by equal forces.
The filter plate 100 (200) is provided at its lower central portion with a depending lug
109 (215) formed with a feed inlet 111 (217) passing through the filter plate. The filter plate 100 (200) is further provided on both sides on the depending lug 109 (215) with filter cloth securing lugs 110 (216).
The filter cloths 300 are preferably somewhat larger in area than the filter plates 100, 200. The upper end 304 of each filter cloth is folded and sewed to form a loop for inserting or accommodating the cloth hanging rod 301 (302) (Figs. 2 and 3).
The filter cloth is fixed to the cloth hanging rod inserted in the said loop by means of pins 305 which pass through holes (not shown) formed in the folded upper end 304 of the filter cloth (Fig. 3). The filter cloths 300 are formed at their lower central portions with lugs 307 and are anchored at the lower portions, with the exception of the central lugs 307, to the filter cloth securing lugs 110 (216) of the filter plates by means of fitting plates 306. The lug 307 of each filter cloth 300 is formed with an opening 308 (Fig. 4), the periphery of which is clamped to the circumference of a feed inlet 111 (217) of the filter plate by means of filter cloth clamp means, for example a pair of front and rear filter cloth clamping annular bodies 113 and 114 (219 and 220) adapted to be inserted into the feed inlet 111 (217) on either side and connected to each other by bolts and nuts 112 (218) (Fig. 4). A pair of the filter plates 100 and 200 form therebetween a filter chamber 500 which communicates with the feed inlet 111 (217) through a slurry passing channel 115 (221).
The front and rear annular bodies 113, 114 (219, 220) comprise a metal annuli 116, 117 (222, 223) and elastomeric covers 118, 119 (224, 225) preferably made of rubber or synthetic resin covering all over the annuli.
The front and rear annular bodies 113, 114 (219, 220) have outer peripheral walls which are tapered to mate with the inner walls 120 (226) of the feed inlet 111 (217) which serve to secure the filter cloth to the filter plate 100 (200) in water tight manner. The annular bodies 113, 114 (219, 220) are formed with channels 121, 122 (227, 228) at locations corresponding to the slurry passing channels 115 (221) to communicate them with the feed inlets 111 (217).
In use, slurry is supplied to the filter press with the filter plates 100 and 200 and filter cloths 300 in the closed position by introducing the slurry into the filter chambers 500 through the feed inlets 111 (217) and communicating channels 121, 122 (227, 228) and 115 (221) and is filtered when it passes through the filter cloths 300. The filtrate flows out through the filtrate flow portions 102 and 208 and is then drained through the outlets 108. After the filtration has been completed, the introduction of the slurry is stopped and thereafter fluid such as water under pressure is forced into the pressure chambers 209 between the central plates 201 and diaphragms 204, 205 to expand them towards the filtrate flow portions 102 of the filter plates 100 such that filter cakes adhered to the filter cloths 300 are squeezed to further reduce the water content of the filter cakes. When the filter plates 100 and 200 are separated, each pair of adjacent filter cloths 300 consequently opens into the form of an inverted V-shape owing to the arrangement according to the invention so that the cloths assume a tilted position which is preferable for discharge of the filter cakes. At the same time, vibration caused in the filter plates 100 and 200 is transmitted to the filter cloths 300 through the springs 105,
106 and 211, 212. The opening of the cloths into the inverted V-shape in conjunction with the transmission of the vibration from the filter plates to filter cloths ensures the complete discharge of the filter cakes from the filter cloths.
As can be seen from the above detailed explanation, the filter press according to the invention is arranged with the filter cloths secured to the lower ends of the filter plates out of the filtering portions thereof in such a manner that, when the filter plates are separated, the whole of the filtering areas of the adjacent filter cloths are displaced from one another and thereby facilitate the discharge or fall of the filter cakes.
WHAT WE CLAIM IS:
1. A filter press comprising a plurality of
vertically oriented filter press plates, each
pair of adjacent filter press plates forming a
filter chamber therebetween when the press
is in a closed position and the adjacent filter
press plates are in close contact with each
other, the filter press plates being of two
types (a) and (b) arranged in alternating
sequence;
each plate (a) having a depending lug
housing a feed inlet, the said lug being
positioned below the bottom of the plate
and outside the filtering area defined by the
periphery of the filter chamber, the said
feed inlet communicating with the filter
chambers on each side of the filter plate by means of channels in the filter plate,
and each plate (b) including a central plate, two diaphragms attached to the periphery of the central plate one on each side thereof by means of a pair of frame members, each frame member having a depending lug housing a feed inlet, the said lug being positioned below the bottom of the frame at a position outside the filtering area defined by the periphery of the filter chamber, the feed inlet on each frame member communicating with the surface of the diaphragm on its side of the filter plate by means of a channel in the frame member,
and pairs of filter cloths arranged between each two adjacent filter plates, the upper ends of the filter cloths being connected to each other, each filter cloth having a depending portion at a position corresponding to the said depending lugs, the depending portions of the filter cloths each having an opening for a corresponding feed inlet, the peripheries of the openings of the filter cloths on either side of each filter press plate being clamped to the corresponding feed inlet on the said filter press plate by means of a pair of annular bodies whereby when the filter press plates are separated, upper portions of each of the said two filter cloths are pulled away from the filter press plates to separate the whole of the filtering areas of the cloths from the filter press plates.
2. A filter press according to claim 1, wherein the filter cloths are hung from arms provided on the upper portions of said filter press plates.
3. A filter press according to claim 2, wherein the filter cloths are hung from the arms by means of springs.
4. A filter press according to any one of the preceding claims, wherein the upper portions of each cloth in each of said pairs
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (5)
- **WARNING** start of CLMS field may overlap end of DESC **.The front and rear annular bodies 113, 114 (219, 220) comprise a metal annuli 116, 117 (222, 223) and elastomeric covers 118, 119 (224, 225) preferably made of rubber or synthetic resin covering all over the annuli.The front and rear annular bodies 113, 114 (219, 220) have outer peripheral walls which are tapered to mate with the inner walls 120 (226) of the feed inlet 111 (217) which serve to secure the filter cloth to the filter plate 100 (200) in water tight manner. The annular bodies 113, 114 (219, 220) are formed with channels 121, 122 (227, 228) at locations corresponding to the slurry passing channels 115 (221) to communicate them with the feed inlets 111 (217).In use, slurry is supplied to the filter press with the filter plates 100 and 200 and filter cloths 300 in the closed position by introducing the slurry into the filter chambers 500 through the feed inlets 111 (217) and communicating channels 121, 122 (227, 228) and 115 (221) and is filtered when it passes through the filter cloths 300. The filtrate flows out through the filtrate flow portions 102 and 208 and is then drained through the outlets 108. After the filtration has been completed, the introduction of the slurry is stopped and thereafter fluid such as water under pressure is forced into the pressure chambers 209 between the central plates 201 and diaphragms 204, 205 to expand them towards the filtrate flow portions 102 of the filter plates 100 such that filter cakes adhered to the filter cloths 300 are squeezed to further reduce the water content of the filter cakes. When the filter plates 100 and 200 are separated, each pair of adjacent filter cloths 300 consequently opens into the form of an inverted V-shape owing to the arrangement according to the invention so that the cloths assume a tilted position which is preferable for discharge of the filter cakes. At the same time, vibration caused in the filter plates 100 and 200 is transmitted to the filter cloths 300 through the springs 105,106 and 211, 212. The opening of the cloths into the inverted V-shape in conjunction with the transmission of the vibration from the filter plates to filter cloths ensures the complete discharge of the filter cakes from the filter cloths.As can be seen from the above detailed explanation, the filter press according to the invention is arranged with the filter cloths secured to the lower ends of the filter plates out of the filtering portions thereof in such a manner that, when the filter plates are separated, the whole of the filtering areas of the adjacent filter cloths are displaced from one another and thereby facilitate the discharge or fall of the filter cakes.WHAT WE CLAIM IS: 1. A filter press comprising a plurality of vertically oriented filter press plates, each pair of adjacent filter press plates forming a filter chamber therebetween when the press is in a closed position and the adjacent filter press plates are in close contact with each other, the filter press plates being of two types (a) and (b) arranged in alternating sequence; each plate (a) having a depending lug housing a feed inlet, the said lug being positioned below the bottom of the plate and outside the filtering area defined by the periphery of the filter chamber, the said feed inlet communicating with the filter chambers on each side of the filter plate by means of channels in the filter plate, and each plate (b) including a central plate, two diaphragms attached to the periphery of the central plate one on each side thereof by means of a pair of frame members, each frame member having a depending lug housing a feed inlet, the said lug being positioned below the bottom of the frame at a position outside the filtering area defined by the periphery of the filter chamber, the feed inlet on each frame member communicating with the surface of the diaphragm on its side of the filter plate by means of a channel in the frame member, and pairs of filter cloths arranged between each two adjacent filter plates, the upper ends of the filter cloths being connected to each other, each filter cloth having a depending portion at a position corresponding to the said depending lugs, the depending portions of the filter cloths each having an opening for a corresponding feed inlet, the peripheries of the openings of the filter cloths on either side of each filter press plate being clamped to the corresponding feed inlet on the said filter press plate by means of a pair of annular bodies whereby when the filter press plates are separated, upper portions of each of the said two filter cloths are pulled away from the filter press plates to separate the whole of the filtering areas of the cloths from the filter press plates.
- 2. A filter press according to claim 1, wherein the filter cloths are hung from arms provided on the upper portions of said filter press plates.
- 3. A filter press according to claim 2, wherein the filter cloths are hung from the arms by means of springs.
- 4. A filter press according to any one of the preceding claims, wherein the upper portions of each cloth in each of said pairsof filter cloths are connected one to another by chains.
- 5. A filter press substantially as hereinbefore described with reference to, and as illustrated in, the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5285076A GB1562736A (en) | 1976-12-17 | 1976-12-17 | Filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5285076A GB1562736A (en) | 1976-12-17 | 1976-12-17 | Filter press |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1562736A true GB1562736A (en) | 1980-03-12 |
Family
ID=10465564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5285076A Expired GB1562736A (en) | 1976-12-17 | 1976-12-17 | Filter press |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1562736A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2129699A (en) * | 1982-09-09 | 1984-05-23 | Kurita Machinery Manuf | Filter press |
| EP0456280A2 (en) * | 1986-09-25 | 1991-11-13 | Kurita Machinery Manufacturing Company Limited | Filter press |
| CN109351004A (en) * | 2018-12-24 | 2019-02-19 | 福建省南星环保科技有限公司 | A kind of fast opening pressure filter |
| CN114748899A (en) * | 2022-04-22 | 2022-07-15 | 南通科邦机械有限公司 | Modularization pressure filter |
| CN114849302A (en) * | 2022-04-22 | 2022-08-05 | 泉州筑友环保机械制造有限公司 | Filter press feeding positioning mechanism and working method thereof |
-
1976
- 1976-12-17 GB GB5285076A patent/GB1562736A/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2129699A (en) * | 1982-09-09 | 1984-05-23 | Kurita Machinery Manuf | Filter press |
| EP0456280A2 (en) * | 1986-09-25 | 1991-11-13 | Kurita Machinery Manufacturing Company Limited | Filter press |
| EP0456280A3 (en) * | 1986-09-25 | 1992-03-18 | Kurita Machinery Manufacturing Company Limited | Filter press |
| CN109351004A (en) * | 2018-12-24 | 2019-02-19 | 福建省南星环保科技有限公司 | A kind of fast opening pressure filter |
| CN109351004B (en) * | 2018-12-24 | 2024-03-08 | 福建省南星环保科技有限公司 | Quick-open filter press |
| CN114748899A (en) * | 2022-04-22 | 2022-07-15 | 南通科邦机械有限公司 | Modularization pressure filter |
| CN114849302A (en) * | 2022-04-22 | 2022-08-05 | 泉州筑友环保机械制造有限公司 | Filter press feeding positioning mechanism and working method thereof |
| CN114748899B (en) * | 2022-04-22 | 2023-08-29 | 南通科邦机械有限公司 | Modularized filter press |
| CN114849302B (en) * | 2022-04-22 | 2023-11-03 | 泉州筑友环保机械制造有限公司 | Filter press feeding positioning mechanism and working method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |