plate filter

Abstract

The invention relates to a filter (10) comprising a container (12) extending along a main axis (A1) and filter plates (24) arranged parallel to the main axis (A1) and disposed in a containment volume (22) of the container (12) in a star pattern, each of the filter plates (24) comprising at least one filter element (34) connected to a collection tube, the filter (10) comprising an external collector (28), each of the collection tubes (36) comprising an end section extending in the containment volume (22) of the container (12) along a secondary axis parallel to the main axis (A1), the end section of each of the collection tubes being fluidically connected to the external collector (28) through a through passage formed in a main wall (20) of the container (12), each passage extending through the main wall (20) along the secondary axis.

Description

Technical Field

[0001] The present invention relates to a pressure filter having vertical filter plates with means for rapidly processing all plates. Background Technology

[0002] In apparatuses used for liquid / solid separation of loaded suspensions on an industrial scale, there are pressure filters with a cylindrical housing called a "container" whose filter plates are arranged vertically. These filter plates comprise one or more filter elements. These filter plates are arranged parallel to each other or radially around the center of the container. The first arrangement is referred to as "parallel"; the second arrangement is referred to as "star-shaped". These plates (whose filter elements are covered with a filter medium, typically cloth) are provided with collection pipes that connect to an external collector, thereby allowing the discharge of the filtered liquid, referred to as "filtrate".

[0003] While such filters offer satisfactory filtration efficiency, they remain complex to install and maintain. In practice, using such filters involves periodically replacing the filter media on the filter plates to maintain optimal filtration performance. The filter plates then need to be removed from the container to replace their filter media.

[0004] Furthermore, in the current filter, the connection between the collection tubes and the external collector is made along a radial axis through the container relative to the main axis of the container. Therefore, moving the filter plates in or out of the container requires several manipulations, including, among others, radial translation of each collection tube to disconnect them from the container, followed by axial movement towards the outside of the container. These operations need to be performed manually on each filter plate of the filter.

[0005] Therefore, this operation is time-consuming, and in cases where the filter is used to separate toxic compounds, the handling of the filter plate can pose significant health risks to the operators responsible for maintenance.

[0006] Therefore, the maintenance of current filters is complex, time-consuming, and potentially dangerous to operators.

[0007] Therefore, the present invention proposes to solve the above problems by providing a filter in which installing or removing the filter plate in the container is quick, efficient and safe for the operator. Summary of the Invention

[0008] This invention relates to a filter comprising: at least one container extending along a main axis; and filter plates arranged parallel to the main axis and disposed within a containment volume defined by the main wall of the container, the filter plates being arranged in a star-shaped pattern within the containment volume of the container, each filter plate including at least one filter element fluidly connected to a collection tube via one of its axial ends. The filter includes at least one external collector extending along the outer surface of the main wall and outside the container's containing volume. Each collection tube includes an end section extending within the container's containing volume along a secondary axis parallel to the main axis. The end section of each collection tube is fluidly connected to the external collector via at least one through channel formed in the main wall of the container, each channel extending through the main wall along the secondary axis.

[0009] Other features according to the invention: - The main wall includes a shoulder that extends radially relative to the main axis, with each channel extending through the shoulder; - Each collection tube in the collection tube includes an end section comprising a collar that extends radially relative to the secondary axis along the outer periphery of the end section, and at least one centering device is axially inserted between each collar and each channel. - Each centering device in the centering device includes at least one fitting fitted to the outer periphery of the end section, the fitting including a free end having a tapered centering surface; - Each centering device in the centering device includes a receiving device for the fitting, the receiving device extending at least partially in each channel, the receiving device including a through hole defined by an inner wall, the inner wall being at least partially conical, so as to form a receiving surface for the centering surface of the fitting. - Each centering device in the centering device includes at least one circular seal mounted around the fitting, the seal including at least two compression surfaces extending in a plane intersecting the secondary axis; - All filter plates are connected to a common hanger that extends within the container's containment volume over the area covered by the filter plates; - Each filter plate is connected to a hanger via its collection pipe; - The hanger has a circular shape, and the axis of rotation of this circular shape is coaxial with the main axis of the container; - The axial holding of the filter plate in the container is ensured by the hangers and by the axial contact of the end sections of each collection tube in the collection tube on the shoulder of the container; - The container includes at least one central conduit extending along the main axis of the container, the central conduit including an axial guide device adapted to cooperate with a complementary guide element carried by a hanger; - The guide element of the hanger is a rod extending parallel to the main axis. The axial guide takes the form of a groove formed on the periphery of the central guide tube and is designed to at least partially accommodate the rod. - Control conduits extend outside the container's containment volume between each channel and the external collector, and each control conduit includes a fluid passage control component; - The filter includes a double plate and a single plate. The double plate includes at least two filter elements fluidly connected to the same collection tube, and the single plate includes a single filter element fluidly connected to the collection tube, each of the single plates extending between the two double plates. Attached Figure Description

[0010] Other features and advantages of the invention will become apparent during the reading of the following detailed description, and for understanding, reference will be made to the accompanying drawings, in which: Figure 1 These are perspective and sectional views of an example filter according to the present invention, the filter comprising a container housing a filter plate connected to a hanger; Figure 2 yes Figure 1 Axial cross-sectional view of the filter container; Figure 3 yes Figure 1 An exploded view of the filter container and the filter plate supported by the filter hanger; Figure 4 yes Figure 1 A detailed view of the end section of the collection tube of one of the filter plates of the filter, the end section including a centering device according to a first example of the invention, the end section being disposed facing a channel formed in the shoulder of the container; Figure 5 yes Figure 1 A detailed view of the end section of the collection tube of one of the filter plates of the filter, the end section including a centering device according to a second example of the invention; Figure 6 yes Figure 5 A detailed view of the end section that fluidly engages with a channel formed in the shoulder of the container; Figure 7 yes Figure 1 A schematic top view of the filter hanger. Detailed Implementation

[0011] For the purposes of describing the invention and understanding the claims, vertical, longitudinal, and transverse orientations will be used in a non-limiting manner, and reference to the Earth's gravity according to the reference frames V, L, T shown in the figures, where the longitudinal axis L and transverse axis T extend in a horizontal plane, are not limited.

[0012] In the following description, the same, similar or analogous elements will be represented by the same reference numerals.

[0013] Figure 1 An example of a filter 10 according to the invention is shown, here being a filter 10 with a vertical filter plate under pressure for liquid / solid separation of a loaded suspension.

[0014] It should be considered that a structural description of filter 10 should be presented first, followed by a functional description of the components of filter 10.

[0015] The filter 10 includes a cylindrical container 12 extending along the main axis A1, the cylindrical container having a conical lower bottom 14, a dome-shaped removable cover 16, and a basic cylindrical central portion 18.

[0016] According to the illustrative example of the invention, the principal axis A1 here is a vertical axis, taking into account the Earth's gravity.

[0017] The container 12 includes, in particular, a main wall 20 that defines a containment volume 22 for the filter plate 24.

[0018] In the illustrative example of the invention, the containing volume 22 for the filter plate 24 extends substantially between the conical lower bottom 14 and the dome-shaped removable cover 16. In other words, the containing volume 22 for the filter plate 24 extends primarily within the cylindrical central portion 18 of the container 12.

[0019] like Figure 2 and Figure 5 As can be seen, the main wall 20 of container 12 includes a shoulder 26 that extends radially relative to the main axis A1 of container 12.

[0020] More specifically, the central portion 18 of container 12 includes a first cylinder C1 having a first diameter and a second cylinder C2 having a second diameter substantially larger than the first diameter, these diameters being considered along the main axis A1 of container 12. The second cylinder C2 is specifically defined to contact the lid 16.

[0021] Shoulder 26 then forms an intermediate wall, which is located here and in a non-restrictive manner. Figure 4 The intermediate wall extends in a visible plane P (which is perpendicular to the main axis of the container) and connects the first cylinder C1 and the second cylinder C2 to each other, as shown in the figure. Figure 2 As can be seen in the text.

[0022] It should also be understood that the dome-shaped removable cover 16 includes a base with the same diameter as the second diameter of the second cylinder C2.

[0023] Container 12 has a mushroom shape, especially in Figure 2 As can be seen in the text.

[0024] The filter 10 also includes an external collector 28 that extends along the outer surface 30 of the main wall 20 of the container 12 and is located outside the containing volume 22 of the container 12. More specifically, and in a non-limiting manner, the external collector 28 here takes the form of a toroidal surface extending around the central portion 18 of the container 12. Even more specifically, the external collector 28 extends towards the shoulder 26 of the container 12.

[0025] refer to Figure 1 and Figure 2 The container 12 includes three concentric central conduits 32 that extend along the main axis A1 of the container 12. Concentricity means that the three central conduits 32 have gradually decreasing diameters, such that they are assembled inside each other. Three outlets, each fluidly connected to one of the central conduits 32, extend through the tapered lower bottom 14 of the container 12.

[0026] However, the operation of such a central catheter 32 will not be described in detail here, as these are not the subject of this invention.

[0027] exist Figure 1 and Figure 3 As can be seen, the filter plate 24 is axially suspended in the container 12, that is, parallel to the main axis A1, and is disposed in the containment volume 22 defined by the main wall 20.

[0028] In an illustrative example of the invention and in a non-limiting manner, the filter plate 24 is arranged radially in a star pattern around the main axis A1 of the container 12.

[0029] Each filter plate in filter plate 24 includes at least one filter element 34, which is fluidly connected to a collection pipe 36 via one of its axial ends.

[0030] The single plate 24a, which includes a single filter element 34 connected to its collection tube 36, and the double plate 24b, which includes two filter elements 34 connected to the same collection tube 36, are identified.

[0031] Here, the single plate 24a extends radially between the two double plates 24b. In other words, the single plate 24a and the double plates 24b are arranged alternately around the main axis A1 of the container 12.

[0032] Each filter element 34 of the single-panel 24a and the double-panel 24b includes at least one drain pipe (not visible) and a cloth 38 covering the drain pipe.

[0033] The collection tube 36 of each filter plate in filter plate 24 includes Figures 4 to 6 The visible main section 40 extends radially relative to the main axis of the container. Each main section 40 of the collection tubes 36 is specifically configured to connect to the filter element 34 of the filter plate 24, such as... Figure 1 and Figure 3 As can be seen in the text.

[0034] More precisely, the outlet of each filter element in filter element 34 is configured to fit at one of its axial ends into an invisible orifice in the main section 40 of its associated collection pipe 36. A sealing profile extending from the fabric then covers the connection between the drain pipe and the main section of the collection pipe, and a ring associated with the clamping system allows the filter element to be locked in position in fluid contact with the main section of the collection pipe.

[0035] In addition, each collection tube in collection tube 36 includes Figures 4 to 6 The visible end section 42 extends along a secondary axis A2 parallel to the main axis of the container.

[0036] It should be considered that the rest of the specification will only describe the structural and functional features of a single collection tube 36 in detail, but it should be understood that these features, with necessary modifications, apply to all collection tubes 36 of the filter 10.

[0037] As can be understood from the foregoing, the radial end of the collection pipe 36 is in the form of an elbow, so that the end section 42 extends along the second axis A2, that is, it extends perpendicular to the main section 40 of the collection pipe 36.

[0038] Furthermore, and Figure 5 As can be seen, the radial end of the collection tube 36, including the end section 42, is the radial end of the collection tube 36 extending near the main wall 20 of the container 12. More precisely, the end section 42 of the collection tube 36 extends within the containing volume 22 of the container 12 such that it is axially aligned with the shoulder 26 of the container along the secondary axis A2.

[0039] Therefore, as Figure 6 As can be seen, the end section 42 is fluidly connected to the end section 42 via at least one through channel 44. Figure 5 The external collector 28 shown has at least one through-channel formed in the main wall 20 of the container 12, specifically in the shoulder 26 of the container 12. In particular, the channel 44 extends along the secondary axis A2 in the shoulder 26.

[0040] according to Figure 5 In the example of the invention illustrated herein, a control conduit 46 extends outside the receiving volume 22 of the container 12 between a channel 44 formed in the shoulder 26 and an external collector 28 to ensure fluid connection between the end section 42 and the external collector 28 of the container 12. It should then be understood that the external collector 28 includes a connection opening 48 oriented toward the channel 44, and the control conduit 46 is connected to the connection opening 48 and the channel 44.

[0041] According to an illustrative example of the invention, the control conduit 46 includes a fluid passage control member 50, such as a faucet. The fluid passage control member 50 can then be switched between an open position that allows fluid passage between the channel 44 and the external collector 28, and a closed position that blocks fluid passage between them.

[0042] Additionally, the control conduit 46 may include a transparent portion that allows visual inspection of the fluid flowing within the control conduit 46.

[0043] It should then be understood that each end segment 42 of each collection tube in the filter's collection tube 36 is fluidly connected to the channel 44 and the control conduit 46. Therefore, the advantage of this filter configuration is that the control conduit 46 associated with each end segment 42 and thus with each filter plate 24 allows for individual control of each filter plate in the filter plate 24.

[0044] like Figure 4 As is particularly evident, each end section 42 of the collection tube 36 includes a collar 52 that extends radially along the outer periphery of the end section 42 relative to the secondary axis A2. The collar 52 extends around the end section 42 at a non-zero axial distance from the free end of the end section 42, so as to leave a cylindrical space around the free end of the end section 42.

[0045] according to Figure 4 In the example of the invention illustrated herein, the centering device 54 is axially inserted between the collar 52 and the channel 44. More specifically, the centering device 54 extends primarily within the aforementioned cylindrical space.

[0046] The centering device 54 includes a fitting 56 that is mounted to the outer periphery of the end section 42. The fitting 56 is mounted to the end section 42 such that it axially abuts against the collar 52. It should then be understood that the fitting 56 is press-fitted around the outer periphery of the end section 42 until it makes axial contact with the collar 52.

[0047] The fitting 56 may therefore include a support surface 58 that extends radially and contacts the collar 52 of the end section 42.

[0048] Accessory 56 also includes a free end with a tapered centering surface 60 for axial insertion of the end section 42 into the channel 44 along the secondary axis A2. Such an assembly will be described in further detail in the specification.

[0049] Therefore, according to Figure 4 In an example illustrating the invention, the edge 62 of the channel 44 has a chamfered profile that is complementary to the tapered centering surface 60 of the fitting 56.

[0050] according to Figure 5 and Figure 6 In another embodiment of the invention, as seen in the diagram, the centering device 54 includes a receiving device 64 for the fitting 56, which extends at least partially in each channel 44. More specifically, the receiving device 64 extends along the secondary axis A2 and includes an inner wall 66 defining a through hole 68. The through hole 68 then extends at least partially in the channel 44.

[0051] The inner wall 66 of the receiving device 64 includes at least one tapered member to form a receiving surface 70 that is complementary to the tapered centering surface 60 of the free end of the fitting 56.

[0052] Furthermore, the centering device 54 includes at least one circular seal 72 mounted around the fitting 56. It should then be understood that the seal 72 includes two compression surfaces 74, which are axially opposed to each other and extend in a plane intersecting the secondary axis A2. In other words, it should be understood that the seal 72 includes a first compression surface 74a and a second compression surface 74b, the first compression surface being in axial contact with the support surface 58 of the fitting 56, and the second compression surface being in axial contact with the support surface 58 of the fitting 56. Figure 4 The edge 62 of channel 44 in the implementation scheme contacts or interacts with the edge of channel 44 according to the implementation scheme. Figure 5 and Figure 6 The receiving device 64 of the accessory 56 of the implementation scheme is in contact.

[0053] according to Figures 4 to 6 The centering device of the present invention can be made of plastic material in a non-limiting manner.

[0054] Therefore, according to Figures 4 to 6 The advantage of the centering device 54 in one or another embodiment is that it allows the end section 42 and the possible channel 44 to be mechanically protected during its axial insertion into the channel 44. In other words, if the centering device 54 is damaged, it can be replaced, and therefore the cost of the centering device is lower than the wear of the end section 42 or channel 44 of the container that needs repair.

[0055] like Figure 1As can be seen, all filter plates 24 are connected to a common hanger 76, which extends within the volume of container 12 and over the coverage area of ​​filter plates 24. More specifically, hanger 76 extends within the volume of container 12 between the collection tube 36 of filter plates 24 and the dome cover 16 of container 12.

[0056] exist Figure 7 The schematically visible hanger 76 has a circular shape, the axis of rotation R of which is coaxial with the main axis A1 of the container 12. The hanger 76 is specifically defined by a central portion 78 in the form of a cylinder and a peripheral portion 80 in the form of a cylinder, the central portion 78 and the peripheral portion 80 being concentric.

[0057] Specifically, the peripheral portion 80 is configured to extend near the shoulder 26 of the container 12.

[0058] Then, the main boom 82 extends radially between the central portion 78 and the peripheral portion 80 of the hanger 76, such that the main boom connects the central portion and the peripheral portion. The intermediate boom 84 also extends between the main booms 82, such that the intermediate boom connects to the main boom.

[0059] Each filter plate in filter plate 24 is connected to hanger 76 via its collection pipe 36. For this purpose, collection pipe 36 includes a fastening device (not visible here) that complements the fastening element 77 connected to hanger 76. Figures 4 to 6 As can be seen in the text.

[0060] For example, and in a non-limiting manner, the fastening element 77 may be a track that, on the one hand, allows the collection tube 36 to slide radially, for example, during maintenance operations of the filter plate 24, and on the other hand, locks the collection tube 36 in place once maintenance of the filter plate 24 has been performed.

[0061] Furthermore, it should be considered that each of the collection tubes 36 is connected to the hanger 76 such that its end section 42 is positioned along the secondary axis A2 facing its associated channel 44.

[0062] In addition, Figure 1 and Figure 3 As can be seen, the hanger 76 includes guide elements 86 that extend axially from the central portion 78 along the main axis A1. The guide elements 86 are specifically in the form of rods that extend axially within the receiving volume 22 of the container 12.

[0063] Then, the rods forming the guide element 86 are configured such that they extend from the central portion 78 of the hanger 76 and at least axially beyond the filter plate 24.

[0064] This construction of the guide element 86 (in the form of a rod) of the hanger 76 is advantageous in the maintenance method of the filter 10, as will be described in detail below.

[0065] The central conduit 32 of the aforementioned container 12, and particularly the radially outermost central conduit 32, includes an axial guide device 88 adapted to cooperate with a guide element 86 carried by a hanger 76.

[0066] According to an example of the invention, the axial guide device 88 takes the form of a groove 88 formed on the periphery of the central conduit 32 and is configured to at least partially accommodate the rod of the hanger 76.

[0067] Then, as can be understood from the preceding description, the filter plate 24 is held radially in the container 12 by means of its connection with the hanger 76.

[0068] It should also be understood that the filter plate 24 is held axially in the container 12 at least in part by axial contact of the end section 42 of the collection tube 36 with the shoulder 26 of the container 12, as previously described.

[0069] Furthermore, the connection between the filter plate 24 and the hanger 76 ensures that the filter plate 24 is axially maintained in the container 12.

[0070] This configuration of container 12 is particularly advantageous because the weight of the filter plate 24 and the hanger 76 against the shoulder 26 helps to seal the end section 42 of the collection tube 36 with the channel 44 by applying axial pressure on the seal 72 of the previously mentioned centering device 54.

[0071] Now will be passed Figures 1 to 7 The rest of the instruction manual describes in detail the operation and maintenance methods of filter 10.

[0072] The operation of filter 10 is noteworthy through two stages called the filtration stage and the cake discharge stage.

[0073] During the filtration stage, the container 12 of the filter 10 is filled with the suspension to be filtered. The container 12 is then pressurized while the filter plate 24 is placed under vacuum via its collection tube 36. The liquid phase of the suspension then passes through the cloth 38 of the filter element 34, while the solid phase remains on the surface of the cloth 38, forming a filter cake. Specifically, the liquid phase passes through the cloth and then enters the collection tube 36 to reach the external collector 28 via the control conduit 46. During the filtration stage, the cloth 38 is pressed against the drain tube of the filter element 34.

[0074] Furthermore, during the filtration stage, the pressure applied to the container 12 allows the compression of the seal 72 of the centering device 54 to be enhanced at its compression surface 74, thereby improving the seal between the collection tube 36 and the channel 44 formed in the shoulder 26 of the container 12.

[0075] The filtration stage stops when the resistance of the filter cake to liquid flow becomes too great.

[0076] At this stage, the filter cake then needs to be separated from the cloth 38, which is the filter cake discharge stage.

[0077] Several filter cake discharge methods can be implemented, such as filter cake discharge by filtrate counterflow. Most often, the filtrate used is stored in a tank called a "discharge tank" located above the filter during the filtration stage. During the filter cake discharge stage, after the container 12 of the filter 10 is exposed to the atmosphere, the filtrate returns to all the filter elements 34 of the filter 10 under the sole action of gravity.

[0078] Once the filter cake separates from its filter element 34, it settles in the suspension between the plates before being extracted, descending to the bottom of the container 12.

[0079] The operation of filter 10 can be performed several times. However, to maintain optimal filtration performance, the cloth 38 needs to be replaced periodically. Then, the filter plate 24 needs to be removed from the container 12 to allow the operator to remove the cloth 38 from the filter element 34.

[0080] The filter 10 according to the invention is thus advantageous in several structural aspects.

[0081] On one hand, the hanger 76 carries all the filter plates 24, which can be removed from the container 12 in a single operation.

[0082] Furthermore, the hanger 76 is integrated into the containment volume 22 of the container 12, so the operator does not need to manually connect the filter plate 24 to the hanger 76. The operator only needs to fix the hanger 76 to an external lifting device, such as an overhead crane.

[0083] On the other hand, the specific structure of the sealed connection between the end section 42 of the collection tube 36 and the channel 44 formed in the shoulder 26 of the container 12 along the secondary axis A2 parallel to the main axis A1 of the container 12 allows the filter plate 24 connected to the hanger 76 to be drawn out along the same main axis A1 of the container 12.

[0084] Furthermore, the seal between the end section 42 of the collection tube 36 and the channel 44 is achieved solely by the weight of the hanger 76, the filter plate 24, and their collection tube 36, which presses axially onto the shoulder 26 of the container 12, thus eliminating the need for a disconnection maneuver between the collection tube 36 and the channel 44.

[0085] It should then be understood that the structure of filter 10 allows for a reduction in operator manipulation necessary to remove filter plate 24 from container 12, thereby reducing associated health risks while also reducing the time required for such manipulation.

[0086] Therefore, once the hanger 76 has been axially removed from the container 12, the filter plates 24 can be maintained, especially by replacing their cloth 38.

[0087] Once the cloth 38 has been replaced, the hanger 76 carrying the filter plate 24 can be reintroduced into the container 12.

[0088] Therefore, such as Figure 3 As illustrated, the hanger 76 supporting the filter plate 24 is axially positioned above the containing volume 22 of the container 12, such that the free end of the rod is located outside the container 12.

[0089] The advantage of the construction of the rod forming a guide element 86 extending axially beyond the filter plate 24 is then understood to be that it allows for visual inspection of the rod's positioning relative to the groove 88 carried by the central conduit 32 of the container 12.

[0090] In other words, during the repositioning of the hanger 76 carrying the filter plate 24 in the container 12, the angular position of the rods relative to the groove 88 is ensured so that they engage with each other during the axial movement of the hanger 76 toward the containing volume 22 of the container 12.

[0091] Then, it should be understood that the angular position of the rod relative to the groove 88 also ensures the angular position of the end section 42 of the collection tube 36 relative to the channel 44 formed in the shoulder 26.

[0092] Therefore, the positioning of the rod in the groove 88 ensures the positioning of the end section 42 of each collection tube in the collection tube 36 in its associated channel 44, and the centering device 54 described above also helps to facilitate the insertion of the end section 42 into the channel 44.

[0093] The weight of the hanger 76 and the filter plate 24 connected to the collection tube 36 then ensures a seal between the end section 42 and the channel 44, as previously described, and the operator does not need to perform a sealing operation.

[0094] Then, it should be understood that during the maintenance of filter 10, the specific construction of the filter and, in particular, the axial fit between the end section 42 of the collection tube 36 and the channel 44 allows for the simplification of the repositioning of the filter plate 24 in container 12, which is performed in a single operation since the hanger 76 carries the filter plate 24.

[0095] Furthermore, the hanger 76 is configured to remain within the containment volume 22 of the container 12, so that once the filter plate 24 is positioned therein, no additional operation is required to disconnect the filter plate 24 from the hanger 76.

Claims

1. A filter (10), the filter comprising: At least one container (12) extends along the main axis (A1); The filter plates (24) are arranged parallel to the main axis (A1) and disposed in a containment volume (22) defined by the main wall (20) of the container (12). The filter plates (24) are arranged in a star pattern in the containment volume (22) of the container (12). Each filter plate (24) includes at least one filter element (34), which is fluidly connected to a collection pipe (36) through one of its axial ends. The filter (10) includes at least one external collector (28) extending along the outer surface (30) of the main wall (20) and outside the containment volume (22) of the container (12). Each collection tube (36) includes an end section (42) extending in the containment volume (22) of the container (12) along a secondary axis (A2) parallel to the main axis (A1). The end section (42) of each collection tube (36) is fluidly connected to the external collector (28) through at least one through channel (44) formed in the main wall (20) of the container (12), each channel (44) extending through the main wall (20) along the secondary axis (A2).

2. The filter (10) according to the preceding claim, wherein, The main wall (20) includes a shoulder (26) extending radially relative to the main axis (A1), and each channel (44) extends through the shoulder (26).

3. The filter (10) according to any one of the preceding claims, wherein, The end section (42) of each of the collection tubes (36) includes a collar (52) that extends radially along the outer periphery of the end section (42) relative to the secondary axis (A2), and at least one centering device (54) is axially inserted between each collar (52) and each channel (44).

4. The filter (10) according to the preceding claim, wherein, Each of the centering devices (54) includes at least one fitting (56) fitted to the outer periphery of the end section (42), the fitting (56) including a free end having a tapered centering surface (60).

5. The filter (10) according to the preceding claim, wherein, Each of the centering devices (54) includes a receiving device (64) for the fitting (56), the receiving device extending at least partially in each channel (44), the receiving device (64) including a through hole (68) defined by an inner wall (66) that is at least partially conical in order to form a receiving surface (70) for the centering surface (60) of the fitting (56).

6. The filter (10) according to any one of claims 4 or 5, wherein, Each of the centering devices (54) includes at least one circular seal (72) mounted around the fitting (56), the seal (72) including at least two compression surfaces (74, 74a, 74b) extending in a plane intersecting the secondary axis (A2).

7. The filter (10) according to any one of the preceding claims, wherein, All of the filter plates (24) are connected to a common hanger (76) that extends within the containment volume (22) of the container (12) and covers the filter plates (24).

8. The filter (10) according to the preceding claim, wherein, Each of the filter plates (24) is connected to the hanger (76) via its collection tube (36).

9. The filter (10) according to any one of claims 7 or 8, wherein, The hanger (76) has a circular shape, and the axis of rotation (R) of the circular shape is coaxial with the main axis (A1) of the container (12).

10. The filter (10) according to any one of claims 7 to 9 in conjunction with claim 2, wherein, The axial holding of the filter plate (24) in the container (12) is ensured by the hanger (76) and by the axial contact of the end section (42) of each of the collection tubes (36) on the shoulder (26) of the container (12).

11. The filter (10) according to any one of claims 7 to 10, wherein, The container (12) includes at least one central conduit (32) extending along the main axis (A1) of the container (12), the central conduit (32) including an axial guide (88) adapted to cooperate with a complementary guide element (86) carried by the hanger (76).

12. The filter (10) according to the preceding claim, wherein, The guide element (86) of the hanger (76) is a rod extending parallel to the main axis (A1), and the axial guide device (88) takes the form of a groove (88) formed on the periphery of the central guide tube (32) and is designed to at least partially accommodate the rod.

13. The filter (10) according to any one of the preceding claims, wherein, Control conduits (46) extend outside the containment volume (22) of the container (12) between each channel (44) and the external collector (28), and each control conduit (46) includes a fluid passage control member (50).

14. The filter (10) according to any one of the preceding claims, the filter comprising a double plate (24, 24b) and a single plate (24, 24a), the double plate comprising at least two filter elements (34) fluidly connected to the same collection tube (36), the single plate comprising a single filter element (34) fluidly connected to the collection tube (36), the single plate (24, 24a) each extending between the two double plates (24, 24b).

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