A variable cross-section distribution pad for a disc filter

Abstract

The invention belongs to the field of disc filters, and in particular relates to a variable-section distribution pad of a disc filter. The distribution pad comprises an A surface and a B surface symmetrically arranged along the thickness direction thereof, the A surface contacts with a matching end surface of a distribution head, and the B surface contacts with a matching end surface of a central axis. A mounting hole vertically penetrating the A surface and the B surface is provided in the middle of the distribution pad, and a plurality of flow channel holes penetrating the A surface and the B surface are evenly distributed along the circumferential direction of the periphery of the mounting hole. The number of the flow channel holes is equal to the number of filter plates per disc filter, and the cross-sectional area of ​​the flow channel holes smoothly transitions along the thickness direction of the distribution pad. Without increasing the number of filter plates per disc of the filter, the blind area of ​​the distribution head interval of the equipment is reduced, the effective filtering area is increased, the filtering effect is improved, and the overall filtering and dehydration time is prolonged. The invention is simple and easy to implement, and can be promoted and used on various disc filters.

Description

Technical Field

[0001] The invention belongs to the field of disc filters, and in particular relates to a variable-section distribution pad of a disc filter. Background Art

[0002] As is known, disc filters are mainly used for filtering and dehydrating aluminum hydroxide seed liquid in alumina plants in the non-ferrous metal industry, flotation concentrate and coal slime in the coal industry, and flotation concentrate, tailings and red mud in various mines.

[0003] The filter disc of the disc filter rotates in the filter tank filled with slurry, and the vacuum pressure is used to adsorb the material to form a filter cake to achieve the purpose of solid-liquid separation. The filtrate of each filter fan converges in the filter plate, flows through the corresponding center axis flow channel, and enters the distribution head; in this process, the main purpose of the distribution head is to complete the conversion between the various zones, and it is fixed. In order to complete the continuous filtration process, the center axis rotates with the filter plate with the center line as the center, and is a rotating end face. A distribution pad is installed on the matching end face of the center axis and the distribution head to ensure the sealing of this dynamic and static matching surface, and it can be replaced after wear. The distribution pad of the traditional disc filter is fixed to the center axis and can be disassembled and replaced. Its hollow part corresponds to the separate center axis flow channel, and the solid part is slightly larger than or exactly corresponds to the solid cross-section of the flow channel.

[0004] The number of filter plates on each disc filter, that is, the number of flow channels, determines the size of the blind area inside the distribution head during operation. Therefore, the more filter plates on each disc, the smaller the blind area of ​​the equipment, the larger the effective working filtration area, and the better the operating effect. However, for a disc of a certain diameter, the installation space size of the sector plate and the production cost limit the number of filter plates on each disc from increasing indefinitely.

[0005] The angle of the blind area between the distribution heads must be at least larger than the central angle of a single sector filter plate. Within a circular range, the effective filtration area is reduced, affecting the filtration effect. Summary of the invention

[0006] In order to solve the problems in the background technology, the present invention discloses a variable cross-section distribution pad of a disc filter, which reduces the blind area of ​​the distribution head interval, increases the effective filtering area, and improves the filtering effect by adjusting the structure of the flow channel hole of the distribution pad.

[0007] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0008] A variable cross-section distribution pad of a disc filter, wherein the distribution pad is arranged between a central axis and a mating end face of a distribution head, the distribution pad comprises an A face and a B face symmetrically arranged along its thickness direction, the A face contacts the mating end face of the distribution head, and the B face contacts the mating end face of the central axis, a mounting hole vertically penetrating the A face and the B face is provided in the middle of the distribution pad, a plurality of flow channel holes penetrating the A face and the B face are evenly distributed along the circumferential direction of the periphery of the mounting hole, the number of the flow channel holes is equal to the number of filter plates per disc filter, the cross-sectional shape of the port on the B face of the flow channel hole is the same as the shape of the flow channel of the central axis, and the corresponding central angle of the port on the B face of the flow channel hole is equal to the corresponding central angle of the fan-shaped plate, the corresponding central angle of the port on the A face of the flow channel hole is smaller than the corresponding central angle of the fan-shaped plate, and the cross-sectional area of ​​the flow channel hole smoothly transitions along the thickness direction of the distribution pad.

[0009] Furthermore, the cross-section of the flow channel hole is in the shape of a sector, a circle or an ellipse.

[0010] Furthermore, the circular angle corresponding to the fan-shaped port on the B surface of the flow channel hole is α, and α is equal to 360 / n degrees, where n is the number of filter plates per disc filter.

[0011] Furthermore, the circular angle corresponding to the fan-shaped port of the flow channel hole surface A is β, and β is smaller than α.

[0012] Furthermore, the inner diameter of the port sector of the flow channel hole A surface is smaller than the inner diameter of the port sector of the flow channel hole B surface, and the outer diameter of the port sector of the flow channel hole A surface is larger than the outer diameter of the port sector of the flow channel hole B surface.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The cross-sectional area of ​​the flow channel hole in the present invention smoothly transitions from small to large along the thickness direction of the distribution pad, and the corresponding central angle of the flow channel hole and the distribution head end face matching port is smaller than the corresponding central angle of the flow channel hole and the center axis end face matching port, which does not affect the installation of the filter plate of the disc filter. Without increasing the number of filter plates per disc of the filter, the blind area of ​​the equipment distribution head interval is reduced, the effective filtration area is increased, the filtration effect is improved, and the overall filtration and dehydration time is extended. The present invention is simple and easy to implement and can be promoted and used on various disc filters. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle CC plane;

[0017] Figure 3 This is a schematic diagram of the main structure of the A surface of the present invention;

[0018] Figure 4 It is a schematic diagram of the main structure of the B side of the present invention;

[0019] In the above figure: 1-flow channel hole; 2-mounting hole; A surface-matching surface with distribution head; B surface-matching surface between distribution pad and central axis; α-circular angle corresponding to the fan-shaped port of flow channel hole B surface; β-circular angle corresponding to the fan-shaped port of flow channel hole A surface. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Combined with Figure 1 -Attached Figure 4 The present invention describes in detail a variable cross-section distribution pad of a disc filter, wherein the distribution pad is arranged between the central axis and the mating end face of the distribution head, and the distribution pad includes an A surface and a B surface symmetrically arranged along the thickness direction thereof, wherein the A surface is the mating end face of the distribution head, and the A surface contacts the mating end face of the distribution head, and the B surface is the mating end face of the central axis, and the B surface contacts the mating end face of the central axis, and a mounting hole 2 vertically penetrating the A surface and the B surface is provided in the middle of the distribution pad, and a transmission shaft is passed through the mounting hole 2, and a plurality of flow channel holes 1 penetrating the A surface and the B surface are uniformly distributed along the circumferential direction of the mounting hole 2 on the periphery of the mounting hole 2, wherein the number of the flow channel holes 1 is equal to the number of filter plates of each disc filter, and the cross-sectional shape of the flow channel hole 1 is fan-shaped, circular or elliptical, and preferably the cross-sectional shape of the flow channel hole 1 is fan-shaped, and the center angle corresponding to the A surface port of the flow channel hole 1 is smaller than the center angle corresponding to the B surface port of the flow channel hole 1, and the cross-sectional area of ​​the flow channel hole 1 is smoothly passed through the thickness direction of the distribution pad. It should be noted here that the circular angle corresponding to the fan-shaped port on the B side of the flow channel hole 1 is preferably α, α is equal to 360 / n degrees, wherein n is the number of filter plates per disc filter, and the circular angle corresponding to the fan-shaped port on the A side of the flow channel hole 1 is β, β is less than α. It should be noted here that, in theory, the larger the n and the smaller the β value, the better the filtering effect of the equipment. However, the larger the n and the smaller the β value, the larger the distribution pad diameter, the higher the equipment cost, and it is not economical. The inner diameter of the fan-shaped port on the A side of the flow channel hole 1 is smaller than the inner diameter of the fan-shaped port on the B side of the flow channel hole 1, and the outer diameter of the fan-shaped port on the A side of the flow channel hole 1 is larger than the outer diameter of the fan-shaped port on the B side of the flow channel hole 1.

[0022] The working process of the present invention is as follows:

[0023] When implementing the present invention, the distribution pad is arranged between the central axis and the matching end face of the distribution head. The distribution pad is detachably connected to the central axis by bolts. The A surface of the distribution pad is matched with the end face of the distribution head, and the B surface of the distribution pad is matched with the end face of the central axis. The cross-sectional shape of the flow channel hole 1 is the same as the shape of the central axis flow channel, both are fan-shaped. The edge of the fan-shaped port of the B surface of the flow channel hole 1 is obtained by the offset of the corresponding axis of the cross-sectional area of ​​the central axis flow channel. The circular angle corresponding to the fan-shaped port of the B surface of the flow channel hole 1 is α, α is equal to 360 / n degrees, where n is the number of filter plates per disc filter. The circular angle corresponding to the fan-shaped port of the A surface of the flow channel hole 1 is β, β is less than α, and the cross-sectional area of ​​the flow channel hole 1 smoothly transitions along the thickness direction of the distribution pad. Without increasing the number of filter discs, the installation of the filter plates of the disc filter is not affected, the blind area angle between the equipment distribution areas is reduced, and the effective filtration area is increased.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A variable cross-section distribution pad for a disc filter, the distribution pad being arranged between a central axis and a matching end surface of a distribution head, characterized in that: The distribution pad includes an A surface and a B surface symmetrically arranged along its thickness direction, wherein the A surface contacts the mating end surface of the distribution head, and the B surface contacts the mating end surface of the center axis. A mounting hole vertically penetrating the A surface and the B surface is provided in the middle of the distribution pad, and a plurality of flow channel holes penetrating the A surface and the B surface are evenly distributed along the circumferential direction of the periphery of the mounting hole, wherein the number of the flow channel holes is equal to the number of filter plates per disc filter, the cross-sectional shape of the port on the B surface of the flow channel hole is the same as the shape of the flow channel of the center axis, and the corresponding central angle of the port on the B surface of the flow channel hole is equal to the corresponding central angle of the fan-shaped plate, and the corresponding central angle of the port on the A surface of the flow channel hole is smaller than the corresponding central angle of the fan-shaped plate, and the cross-sectional area of ​​the flow channel hole smoothly transitions along the thickness direction of the distribution pad.

2. A variable cross-section distribution pad for a disc filter according to claim 1, characterized in that: The shape of the cross section of the flow channel hole is sector-shaped, circular or elliptical.

3. According to claim 2, a variable cross-section distribution pad of a disc filter, characterized in that: the flow channel The circular angle corresponding to the sector of the port on the hole B surface is α, which is equal to 360 / n degrees, where n is the number of filter plates per disc filter.

4. A variable cross-section distribution pad for a disc filter according to claim 3, characterized in that: The circular angle corresponding to the fan-shaped port on the A surface of the flow channel hole is β, and β is smaller than α.

5. A variable cross-section distribution pad for a disc filter according to claim 4, characterized in that: the flow channel The inner diameter of the port sector of the hole A surface is smaller than the inner diameter of the port sector of the flow channel hole B surface, and the outer diameter of the port sector of the flow channel hole A surface is larger than the outer diameter of the port sector of the flow channel hole B surface.

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