Large leaf filter core and filtration equipment for aluminum liquid circulation purification

Abstract

The present invention discloses a large leaf filter core for circulating and purifying aluminum liquid, comprising a collection pipe fixed on the top of a plurality of filter discs, wherein a negative pressure is formed at the collection pipe so that the solution enters the collection pipe through the filter discs, and the collection pipe is also provided with a collection port for collecting the solution and discharging the material. The filter discs are covered with a mesh surface and filtered through a filter cloth sleeved on the outer periphery. The filter discs have a frame divided into a plurality of partitions, and the plurality of partitions evenly collect the solution and transport it to the collection pipe. By using transverse tubes to divide the partitions in the filter element and arranging a guide mechanism in the partitions, on the one hand, the guide mechanism is used to evenly guide the solution to each partition to increase the monomer flux of the filter element, thereby achieving the purpose of improving operating efficiency, and on the other hand, the filter element is prevented from twisting and deforming while increasing the filtration area of ​​the filter element.

Description

Technical Field

[0001] Large leaf filter cores and filtration equipment for circulating and purifying molten aluminum. Background Art

[0002] In the Bayer process of alumina preparation, leaf filter equipment is often used to filter industrial circulating solutions before use. Various oxides in bauxite will form filter residues on the periphery of the leaf filter cloth after chemical reactions, and the adsorption on the periphery of the filter cloth is usually not uniform due to the influence of the equipment feed position, which will affect the equipment's working efficiency over time. For example, Chinese Utility Model Publication No. CN210278501U discloses a leaf filter pre-filtration mechanism. By setting a stirring mechanism inside the filtering equipment, the filter residue is suspended in the solution as evenly as possible, making the adsorption on the periphery of the filter cloth uniform. However, due to the limited space in the filter container, the arrangement of the stirring mechanism will inevitably reduce the number of leaf filters, thereby reducing working efficiency. Summary of the Invention

[0003] In order to achieve the above object, the technical solution adopted by the present invention is:

[0004] The large leaf filter core used for circulating and purifying aluminum liquid includes a collection pipe fixed on the top of several filter discs. Negative pressure is formed at the collection pipe to allow the solution to enter the collection pipe through the filter discs. The collection pipe is also provided with a collection port for collecting the solution and discharging the material. The filter discs are covered with a mesh surface and filtered through a filter cloth sleeved on the outer periphery.

[0005] The filter disc has a frame divided into a plurality of partitions, and the plurality of partitions collect the solution in a balanced manner and transport the solution to the collecting pipe.

[0006] In some embodiments, the partitions are separated by staggered transverse tubes, and the transverse tubes are evenly provided with through holes and are interconnected with the frame and the collecting pipe.

[0007] In some embodiments, the transverse tube includes at least one first transverse tube and at least one second transverse tube, the through hole is opened on the first transverse tube, and the second transverse tube is staggered with the first transverse tube to achieve partitioning and enhance the torsional resistance of the frame.

[0008] In some embodiments, a flow guiding mechanism is provided in the partition, and the flow guiding mechanism enables the solution to be evenly absorbed by the through hole.

[0009] In some embodiments, the flow guiding mechanism is composed of a plurality of fins, and the plurality of fins are parallel to and point toward the through hole to form a flow channel to guide the solution into the through hole.

[0010] In some embodiments, balancing holes are further provided at the ends of the plurality of fins, and the balancing holes enable the solutions between adjacent flow channels to be exchanged to balance the pressure.

[0011] In some embodiments, the fins are connected in series by fin fixing members to be fixed to the frame and / or the second transverse tube.

[0012] In some embodiments, a fin shielding bracket is further provided at the end of the fin, and the fin shielding bracket shields the fin from both sides to prevent it from being separated from the mesh surface.

[0013] In some embodiments, the fin shielding bracket is fixed to the fin by welding.

[0014] In some embodiments, the mesh surface is composed of a plurality of metal wires and supporting members that are staggered and support each other in different directions with gaps left therebetween, thereby forming a dense supporting structure for the filter bag on the side of the filter disc.

[0015] In some embodiments, a mesh shielding bracket is provided between the frame and the mesh to shield the edge of the mesh.

[0016] A filtering device, the above-mentioned large leaf filter core used for circulating and purifying aluminum liquid.

[0017] The beneficial effects of the present invention are:

[0018] The large leaf filter core and filtering equipment for circulating and purifying aluminum liquid provided by the present invention use transverse tubes to divide the filter element into zones and arrange guide mechanisms in the zones. On the one hand, the guide mechanisms are used to evenly guide the solution to each zone to increase the monomer flux of the filter element, thereby achieving the purpose of improving operating efficiency. On the other hand, the filter element's filtering area is increased while preventing it from twisting and deforming. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments or the prior art.

[0020] Figure 1 It is an overall schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the relationship between the filter element and the filter container.

[0022] Figure 3 yes Figure 1 Top view perspective view.

[0023] Figure 4 It is a schematic diagram of the filter structure (point b is a schematic diagram of the mesh coverage).

[0024] Figure 5 yes Figure 4 Enlarged view of point a.

[0025] Figure 6 yes Figure 4 AA cross-sectional view (used to show the first cross tube).

[0026] Figure 7 It is a schematic diagram of the fin structure.

[0027] Figure 8 yes Figure 4 BB cross-sectional view (used to show the mesh structure).

[0028] Figure 9 yes Figure 4 CC cross-sectional view. DETAILED DESCRIPTION

[0029] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. The above description is simplified for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0030] The following describes exemplary embodiments of the present application with reference to the accompanying drawings. However, it should be understood that the present application can be presented in many different ways and is not limited to the embodiments described below. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide many additional embodiments. In all figures, the same reference numerals represent the same elements or elements with the same function.

[0031] refer to Figures 1 to 3 A schematic diagram of a large leaf filter core used for circulating and purifying molten aluminum is shown. A filter element 30 with a mesh surface 40 is located at the bottom of a circular manifold 10. A filter cloth (not shown) is placed over the filter element 30. Negative pressure is generated at the manifold 10, filtering and extracting the solution from the filter element 30, which is composed of several filter discs 31. The solution is then transported outward through the manifold opening 11 and connector 12. The manifold 10 consists of a first branch manifold 13 and a second branch manifold 14, mirror images of each other, connected at the manifold opening 11. The filter discs 31 are secured to the lower portion of the manifold 10 by a frame 32, forming a hanging structure. The frame 32 is hollow and connects to the first and second branch manifolds 13, 14, allowing the solution to flow through.

[0032] refer to Figures 4 to 7The structure of the filter disc 31 is shown. The frame 32 is the outer frame of the filter disc 31, and is a rectangular structure formed by the first side frame 32a and the second side frame 32b. The frame 32 is specifically connected to the first branch collecting pipe 13 and the second branch collecting pipe 14 through the top of the first side frame 32a and the second side frame 32b. The interior of the frame 32 is supported by a plurality of first transverse tubes 33 and second transverse tubes 34 arranged in an interlaced manner. On the one hand, its rigidity is strengthened to prevent the frame 32 from being twisted during use, so that the filter element 30 can be made into a size of about 38 meters or even larger; on the other hand, the area enclosed by the frame 32 is divided into several partitions 34 by the first transverse tube 33 and the second transverse tube 34. The first transverse tube 33 is also hollow and interconnected with the frame 32, and holes 33a for the solution to flow into the first transverse tube 33 are equidistantly arranged on its upper and lower sides. Therefore, when negative pressure is generated at the manifold 10, the solution in the partition 34 flows from the hole 33a through the first transverse tube 33 in sequence and enters the first side frame 32a and the second side frame 32b from both ends of the first transverse tube 33 before flowing into the manifold 10. Each partition 34 is provided with a flow guide mechanism consisting of a plurality of equidistant and parallel fins 35. The ends of the fins 35 point toward the hole 33a, forming a flow channel 37 between each two adjacent fins 35 to guide the solution into the hole 33a. The fins 35 are provided with through-holes 36b for the fin fixings 36 to pass through. The fin fixings 36 are used to string together a plurality of fins 35 into an assembly, which is then fixed to the second transverse tube 34 and / or the frame 32 on both sides. Because the pressure at the hole 33a is greater than the pressure in the flow channel 37, balancing holes 36a are also provided at the ends of the fins 35 to allow for the exchange of solution between adjacent flow channels 37 to balance the pressure.

[0033] Figure 9 The structural relationship between the mesh 40 and the filter 31 is shown. The front and rear sides of the frame 32 are covered with mesh 40 to shield the area enclosed by it. The mesh 40 is composed of a number of metal wires 41 and supports 42 that are staggered and support each other in two different directions. There are gaps between adjacent metal wires 41 to allow the solution to pass through. A mesh shielding bracket 43 is provided on the side of the frame 32 facing the mesh 40. The mesh shielding bracket 43 shields the edge areas of the mesh 40 on both sides from the outside. On the one hand, it limits the mesh 40 so that it is close to the frame 32, and on the other hand, it prevents scratches caused by direct contact with the edge of the mesh 40.

[0034] Figure 4In one embodiment of the present invention, holes 33a are also provided on the sides of the top and bottom frames 38 and 39 facing the fins 35, forming a continuous loop throughout the frame 32. Because the fin ends may sway under the influence of fluid, a fin shielding bracket 36c is provided inside the mesh shielding bracket 43 to prevent the fin ends 36d from contacting the mesh 40. In another embodiment, the fin ends 36d are prevented from being fixed to the fin shielding bracket 36c.

[0035] Combined with reference Figure 2 The collecting pipe 10 is designed to be annular and can be adapted to the circular container 20 by mounting filter discs 31 of different sizes.

[0036] In an embodiment not shown, the collecting pipe 10 may be designed to be in other shapes such as a rectangle or a bar, which is not limited to the concept of the present application.

[0037] It will be understood that although the terms "first," "second," etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Thus, a first element may be referred to as a second element without departing from the teachings of the present invention.

[0038] In the specification, when an element is referred to as being “on,” “fixed” to, or “connected to,” etc., another element, the element may be directly on, fixed to, connected to, or in contact with the other element, or intervening elements may be present. In the specification, when a feature is arranged “adjacent” to another feature, it may mean that the feature has a portion overlapping with the adjacent feature or a portion located above or below the adjacent feature.

Claims

1. A large leaf filter core for circulating and purifying aluminum liquid, comprising a collecting pipe fixed on top of several filter discs, wherein negative pressure is formed at the collecting pipe so that the solution enters the collecting pipe through the filter discs, and the collecting pipe is also provided with a collecting port for collecting the solution and discharging the material. The filter discs are covered with a mesh surface and filtered through a filter cloth sleeved on the outer periphery. The characteristics are: The filter disc has a frame divided into a plurality of partitions, wherein the plurality of partitions evenly collect the solution and transport it to the collecting pipe; the partitions are separated by staggered transverse tubes, and the transverse tubes are evenly provided with through holes and communicate with the frame and the collecting pipe; A flow guiding mechanism is provided in the partition, and the flow guiding mechanism enables the solution to be evenly absorbed by the through hole; The flow guiding mechanism is composed of a plurality of fins, which are parallel to and point toward the through hole to form a flow channel to guide the solution into the through hole; The ends of the plurality of fins are further provided with balancing holes, which enable the solutions between adjacent flow channels to be exchanged to balance the pressure.

2. The large leaf filter core for circulating and purifying aluminum liquid according to claim 1, characterized in that: The transverse tube includes at least one first transverse tube and at least one second transverse tube. The through hole is opened on the first transverse tube. The second transverse tube and the first transverse tube are staggered to achieve partitioning and strengthen the torsional resistance of the frame.

3. The large leaf filter core for circulating and purifying aluminum liquid according to claim 2, characterized in that: The fins are connected in series by fin fixing members to be fixed on the frame and / or the second transverse tube.

4. The large leaf filter core for circulating and purifying aluminum liquid according to claim 1, characterized in that: The ends of the fins are further provided with fin shielding brackets, which shield the fins from both sides to prevent them from being separated from the mesh surface.

5. The large leaf filter core for circulating and purifying aluminum liquid according to claim 1, characterized in that: The fin shielding bracket is welded and fixed to the fin.

6. The large leaf filter core for circulating and purifying aluminum liquid according to any one of claims 1 to 5, characterized in that: The mesh surface is composed of a plurality of metal wires and supporting members that are staggered and mutually supported in different directions with gaps left therebetween, thereby forming a dense supporting structure for the filter bag on the side of the filter disc.

7. The large leaf filter core for circulating and purifying aluminum liquid according to claim 6, characterized in that: A mesh shielding bracket is provided between the frame and the mesh to shield the edge of the mesh.

8. A filtering device, characterized in that: A large leaf filter core for circulating and purifying aluminum liquid comprising the large leaf filter core according to any one of claims 1 to 7.

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