Ceramic filter plate set for ceramic filter tank

Abstract

The utility model relates to a kind of ceramic filter plate groups for ceramic filter tank are provided with auxiliary backwashing mechanism on the both sides of positioning seat, it includes mounting seat, flushing long hole extending along the width direction of plate base is equipped on mounting seat, flushing long hole is communicated with the inner cavity of mounting seat by being equipped at least one connecting hole on positioning seat, the opening of flushing long hole is hinged with only one-way opening opening and closing long plate by hinged axle, hinged axle is located at the side of opening and closing long plate away from positioning seat, opening and closing long plate and mounting seat are equipped with tension spring to provide the elastic force of opening and closing long plate towards closing direction, opening and closing long plate is filter plate with capillary micropore. By flushing the micropore of backwashing simultaneously, also a large number of particles and impurities on the surface and surface vicinity of ceramic filter plate are washed away, so that the time of ceramic filter plate being plugged again is lengthened, to improve filtration efficiency.

Description

Technical Field

[0001] This utility model relates to a ceramic filter plate assembly for a ceramic filter tank. Background Technology

[0002] In alumina production, ceramic filter plate assemblies are typically placed in filter tanks. The suction pipes connected to the pump are attached to the outlets of the individual ceramic filter plates in the assemblies. Multiple ceramic filter plates are usually installed in a filter tank to improve filtration efficiency. Ceramic filter plate assemblies are prone to clogging due to issues such as free iron compounds, fine particle deposition, and chemical scaling (e.g., calcium carbonate and calcium sulfate) in the slurry. If not cleaned in time, the ceramic filter plates will eventually break due to the increasing suction pressure. Existing technologies also include backwashing solutions, which introduce liquid from the outlet of the ceramic filter plate to flush out impurities or particles that have entered its micropores. However, since the ceramic filter tank is a closed space, the particles and impurities are cleaned periodically. Before cleaning, as the filtrate is pumped away, more and more particles and impurities accumulate. A large number of particles and other impurities often accumulate near the ceramic filter plate. These particles and impurities are located on or near the outer surface of the ceramic filter plate, and they are difficult to be flushed away by the liquid that is currently being flushed out from the micropores. This results in particles and impurities on or near the surface of the ceramic filter plate re-entering the micropores after only a short period of use following backwashing, causing the ceramic filter plate to become clogged again. In other words, the cycle of micropore clogging of the ceramic filter plate is too short, necessitating an increase in the frequency of backwashing, which will affect the filtration efficiency. Utility Model Content

[0003] Based on the above problems, this application aims to improve filtration efficiency by backwashing away a large number of particles and impurities on and near the surface of the ceramic filter plate while backwashing the micropores, thus extending the time before the ceramic filter plate is re-clogged. To this end, this utility model provides a ceramic filter plate assembly for a ceramic filter tank.

[0004] The technical solution of this utility model is as follows: A ceramic filter plate assembly for a ceramic filter tank, comprising multiple ceramic filter plates sharing a common backwashing system, wherein the ceramic filter plates include:

[0005] The plate base is a microporous ceramic sheet-like shell structure;

[0006] The positioning seat includes an inner cavity, one end of which is connected to a plate base, and the other end has a water outlet. Bolt holes are symmetrically arranged on the inner cavity for fixing relative to the ceramic tank.

[0007] There are two auxiliary backwashing mechanisms, symmetrically installed on both sides of the positioning seat. The mechanism includes a mounting seat, on which a flushing elongated hole extends along the width of the plate base. The flushing elongated hole communicates with the inner cavity of the mounting seat through at least one connecting hole provided on the positioning seat. The opening of the flushing elongated hole is hinged to an opening and closing elongated plate that can only be opened in one direction via a hinge shaft. The hinge shaft is located on the side of the opening and closing elongated plate away from the positioning seat. A tension spring is provided between the opening and closing elongated plate and the mounting seat to provide an elastic force to the opening and closing elongated plate in the closing direction. The opening and closing elongated plate is a filter plate with capillary micropores.

[0008] Based on the above solution, a further improvement is made as follows: the mounting base is equipped with a limiting stop for restricting the opening and closing of the long plate, thereby limiting the maximum opening angle of the long plate. This ensures sufficient pressure of the flushing fluid, ensuring that the surface of the ceramic filter plate and its vicinity are preferentially flushed and cleaned.

[0009] Based on the above solution, further improvements are made as follows: the mounting base and the positioning base are detachably connected by bolts, and an elastic sealing ring is provided at the contact interface between the mounting base and the positioning base. On the one hand, the detachable connection facilitates the replacement of consumable parts and the modification of existing ceramic filter plates; on the other hand, the structure of the bolts compressing the elastic sealing ring ensures good sealing of the connection interface, preventing leakage.

[0010] Based on the above solution, the following improvements are made: the end of the opening and closing plate furthest from the hinge axis is a first cylindrical surface, and a corresponding second cylindrical surface is provided on the mounting base. The use of the first and second cylindrical surfaces increases the fitting precision between the opening and closing plate and the mounting base, making leakage less likely, because the opening and closing plate rotates, and its mating surface with the mounting base is not planar.

[0011] Based on the above solution, the following improvements are made: the surface of the mounting base that is in contact with the opening and closing plate is a smooth plane, and this smooth plane is a rectangular ring structure to seal and fit with the four sides of the opening and closing plate respectively.

[0012] Based on the above scheme, the following improvements are made: the auxiliary backwashing mechanism is set at one end of the positioning seat near the plate base.

[0013] The beneficial effects of this technical solution are as follows: During normal filtration, the opening and closing plate of the ceramic filter plate is in a closed state under the combined action of the tension of the spring and the vacuum suction of the inner cavity. Most of the filtrate passes through the micropores of the substrate into the inner cavity of the positioning seat and then flows out from the outlet. A small portion of the filtrate passes through the capillary micropores of the opening and closing plate into the flushing long hole-connecting hole-inner cavity and flows out from the outlet. At this time, the opening and closing long hole performs a small amount of filtration. When backwashing is required, the filtrate or flushing liquid enters the inner cavity of the positioning seat from the outlet in the opposite direction. Part of it passes through the micropores of the plate base to flush out the particles and impurities clogging the micropores, and the other part enters the flushing long hole through the connecting hole and applies pressure to the opening and closing plate. When this pressure is less than the tension of the spring, the opening and closing plate... When the filter is not open, the filtrate passes through the capillary pores of the rinsing plate to flush out the particles clogging the pores. As the pressure of the filtrate in the rinsing pores increases, the pressure overcomes the tension of the spring, causing the rinsing plate to open around its hinge axis. The opening is located near the surface of the plate base. As the rinsing plate opens, the high-pressure filtrate in the rinsing pores is flushed out, thereby washing away particles and impurities on and near the plate base surface. This keeps these particles and impurities away from the ceramic filter plate, thus prolonging the time before the ceramic filter plate becomes clogged again. After rinsing is completed, the filtrate entering through the outlet is depressurized, and the water pressure at the rinsing pores also decreases. When it falls below the tension of the spring, the rinsing plate is pulled by the spring and closes again, allowing it to re-enter the filtration process. As can be seen from the above process, the technical solution of this application, compared with the prior art, can not only clean the blockage in the micropores of the ceramic filter plate, but also flush the surface of the ceramic filter plate and the particles and impurities near the surface. This allows the particles and impurities that gradually accumulate near the ceramic filter plate during the filtration process to be flushed away, thereby extending the time before the ceramic filter plate is re-clogged, reducing the frequency of backwashing, and thus improving the filtration efficiency. Moreover, the solution of this application is fully automated, requiring no human assistance, no additional power source or flushing liquid, and can be modified for existing ceramic filter plates. It has strong applicability and practicality and is suitable for widespread promotion. Attached Figure Description

[0014] Figure 1 This is a top view of a specific embodiment of a ceramic filter plate assembly for a ceramic filter tank according to the present invention;

[0015] Figure 2 This is a schematic diagram of the longitudinal section of the ceramic filter plate in the filtration state in Figure 1.

[0016] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0017] Figure 4 A schematic diagram of the longitudinal section of a ceramic filter plate in the backwashing state;

[0018] Figure 5 for Figure 4 A magnified view of a section at point B in the middle;

[0019] Figure 6 Top view of the plate base and positioning seat (without auxiliary backwashing mechanism installed);

[0020] Figure 7 Top view of the plate base and positioning seat (after installation of the auxiliary backwashing mechanism);

[0021] In the diagram: 1-Suction pump, 2-Suction pipe, 3-Two-position three-way solenoid valve, 4-Ceramic filter tank, 5-Ceramic filter plate, 51-Positioning seat, 511-Outlet, 512-Inner cavity, 513-Connecting hole, 514-Bolt hole, 52-Plate base, 6-Auxiliary backwashing mechanism, 61-Mounting seat, 611-Flushing elongated hole, 612-Limiting baffle, 613-Second cylindrical surface, 62-Opening and closing elongated plate, 621-First cylindrical surface, 63-Hinge shaft, 64-Tension spring, 7-Bolt. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0026] A specific embodiment of the ceramic filter plate assembly for a ceramic filter tank according to this utility model is as follows: Figure 1-7 As shown, four ceramic filter plates 5 are installed inside the ceramic filter tank via an annular mounting plate to form a ceramic filter plate assembly. An external suction pump 1 is simultaneously connected to four suction pipes 2. The other ends of the four suction pipes 2 are connected to the outlets 511 of the four ceramic filter plates 5, respectively. Two-position three-way solenoid valves 3 are installed on each of the four suction pipes 2. Two openings of the two-position three-way solenoid valves 3 are connected in series on the suction pipes 2, and the other opening is connected to the inlet of the suction pump 1. This suction system, through the installation of the two-position three-way solenoid valves 3, is converted into a comprehensive system capable of both suctioning filtrate and online backwashing. During operation, at least one two-position three-way solenoid valve 3 is in the first valve position, supplying filtrate from the suction pump 1 to the corresponding ceramic filter plate 5, while the remaining two-position three-way solenoid valves 3 are in the second valve position, allowing filtrate to flow from the ceramic filter plates 5 to the suction pump 1.

[0027] Specifically, the structure of the ceramic filter plate 5 is as follows: Figure 2 , 6 As shown, the system includes a plate base 52 and a positioning seat 51. The plate base 52 is a microporous ceramic sheet shell structure, mainly made of high-temperature and corrosion-resistant ceramic materials such as corundum (Al2O3) and silicon carbide (SiC). It is formed through high-temperature sintering to create a porous structure filled with crisscrossing capillary micropores (approximately 1-10 micrometers in diameter), serving as filtrate channels and utilizing capillary action to achieve solid-liquid separation. The positioning seat 51, fixed to the plate base 52, is typically made of stainless steel or polymer material to ensure corrosion resistance and facilitate connection to the suction system and fixation of the ceramic filter plate 5. The positioning seat 51 includes an inner cavity 512, one end of which is connected to the plate base 52, and the other end has an outlet 511 with symmetrically arranged bolt holes 514 for fixing relative to the ceramic container.

[0028] like Figure 2-3 As shown, there are two auxiliary backwashing mechanisms 6, symmetrically installed on both sides of the positioning seat 51, namely... Figure 2 The upper and lower sides shown specifically include a mounting base 61. The material of the mounting base 61 can be the same as that of the positioning base 51. The cross-section is generally L-shaped. The mounting base 61 is provided with a flushing elongated hole 611 extending along the width direction of the plate base 52. The flushing elongated hole 611 passes through at least one connecting hole 513 provided on the positioning base 51. Figure 6 The eight connecting holes 513 are connected to the inner cavity 512 of the mounting base 61. The opening of the flushing long hole 611 is hinged to the opening and closing long plate 62, which can only be opened in one direction, via the hinge shaft 63. The hinge shaft 63 is located on the side of the opening and closing long plate 62 away from the positioning base 51. A tension spring 64 is provided between the opening and closing long plate 62 and the mounting base 61 to provide the opening and closing long plate 62 with an elastic force in the closing direction. The opening and closing long plate 62 is a filter plate with capillary micropores, and the material can be the same as the material of the plate base 52.

[0029] like Figure 4 , 5 As shown, the mounting base 61 is provided with a limiting stop 612 for limiting the opening and closing long plate 62, thereby limiting the maximum opening angle of the opening and closing long plate 62. This ensures that the pressure of the flushing fluid is sufficient, and that the surface and surrounding area of ​​the ceramic filter plate 5 are preferentially flushed and cleaned. The end of the opening and closing long plate 62 away from the hinge axis 63 is a first cylindrical surface 621, and a corresponding second cylindrical surface 613 is provided on the mounting base 61 to mate with it. The provision of the first and second cylindrical surfaces 613 makes the fit between the opening and closing long plate 62 and the mounting base 61 more precise and less prone to leakage, because the opening and closing long plate 62 rotates, and its mating surface with the mounting base 61 is not planar. The surface of the mounting base 61 that is in contact with the opening and closing long plate 62 is a smooth plane, which is a rectangular ring structure to seal and fit against the four sides of the opening and closing long plate 62 respectively. An auxiliary backwashing mechanism 6 is provided at the end of the positioning base 51 near the plate base 52.

[0030] In this embodiment, the mounting base 61 and the positioning base 51 are detachably connected by bolts, and an elastic sealing ring is provided at the contact interface between the mounting base 61 and the positioning base 51. This detachable connection facilitates the replacement of consumable parts and the modification of existing ceramic filter plates 5. Furthermore, the bolt-pressed elastic sealing ring structure ensures a good seal at the connection interface, preventing leakage. In other embodiments, both the mounting base 61 and the positioning base 51 are made of stainless steel and can be connected by welding.

[0031] During normal filtration, the ceramic filter plate 5 is closed under the combined action of the tension of the spring 64 and the vacuum suction of the inner cavity 512. Most of the filtrate passes through the micropores of the substrate into the inner cavity 512 of the positioning seat 51, and then flows out from the outlet 511. A small portion of the filtrate passes through the capillary micropores of the opening and closing plate 62 into the flushing hole 611-connecting hole 513-inner cavity 512, and flows out from the outlet 511. At this time, the opening and closing hole performs a small amount of filtration. When backwashing is required, the filtrate or flushing liquid flows in the opposite direction from the outlet 511 of the positioning seat 51 into its inner cavity 512. Part of it passes through the micropores of the plate base 52 to flush out the particles and impurities clogging the micropores, and the other part passes through the connecting hole 513 into the flushing hole 611 and applies pressure to the opening and closing plate 62. When this pressure is less than the tension of the spring 64, the opening and closing plate... When plate 62 is not open, the filtrate passes through the capillary pores of the opening and closing plate 62 to flush out the particles clogging the capillary pores. As the pressure of the filtrate in the flushing orifice 611 increases, the pressure overcomes the tension of the spring 64, causing the opening and closing plate 62 to open around its hinge axis 63, with its opening located near the surface of the plate base 52. As the opening and closing plate 62 opens, the high-pressure filtrate in the flushing orifice 611 is flushed out, thereby washing away the particles and impurities on and near the surface of the plate base 52, keeping these particles and impurities away from the ceramic filter plate 5, so as to prolong the time before the ceramic filter plate 5 becomes clogged again. After flushing is completed, the filtrate entering through the outlet 511 is depressurized, and the water pressure at the flushing orifice 611 also decreases. When it is lower than the tension of the spring 64, the opening and closing plate 62 is pulled by the spring 64 and closes again, so as to re-enter the filtration stage. As can be seen from the above process, the technical solution of this application, compared with the prior art, can not only clean the blockage in the micropores of the ceramic filter plate 5, but also flush the surface of the ceramic filter plate 5 and the particles and impurities near the surface. This allows the particles and impurities that gradually accumulate near the ceramic filter plate 5 during the filtration process to be flushed away, thereby extending the time before the ceramic filter plate 5 is re-clogged, reducing the frequency of backwashing, and thus improving the filtration efficiency. Moreover, the solution of this application is fully automated, requiring no human assistance, no additional power source or flushing liquid, and can be modified from existing ceramic filter plates 5. It has strong applicability and practicality and is suitable for widespread promotion.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A ceramic filter plate assembly for a ceramic filter tank, comprising multiple ceramic filter plates sharing a common backwashing system, wherein the ceramic filter plates include: The plate base is a microporous ceramic sheet-like shell structure; The positioning seat includes an inner cavity, one end of which is connected to a plate base, and the other end has a water outlet. Bolt holes are symmetrically arranged on the inner cavity for fixing relative to the ceramic tank. Its characteristic is that it further includes: There are two auxiliary backwashing mechanisms, symmetrically installed on both sides of the positioning seat. The mechanism includes a mounting seat, on which a flushing elongated hole extends along the width of the plate base. The flushing elongated hole communicates with the inner cavity of the mounting seat through at least one connecting hole provided on the positioning seat. The opening of the flushing elongated hole is hinged to an opening and closing elongated plate that can only be opened in one direction via a hinge shaft. The hinge shaft is located on the side of the opening and closing elongated plate away from the positioning seat. A tension spring is provided between the opening and closing elongated plate and the mounting seat to provide an elastic force to the opening and closing elongated plate in the closing direction. The opening and closing elongated plate is a filter plate with capillary micropores.

2. The ceramic filter plate assembly for a ceramic filter tank according to claim 1, characterized in that, The mounting base is provided with a limiting stop for limiting the opening and closing of the long plate, thereby limiting the maximum opening angle of the long plate.

3. The ceramic filter plate assembly for a ceramic filter tank according to claim 1, characterized in that, The mounting base and the positioning base are detachably connected by bolts, and an elastic sealing ring is provided at the contact interface between the mounting base and the positioning base.

4. The ceramic filter plate assembly for a ceramic filter tank according to claim 1, characterized in that, The end of the opening and closing plate away from the hinge axis is a first cylindrical surface, and a corresponding second cylindrical surface is provided on the mounting base.

5. A ceramic filter plate assembly for a ceramic filter tank according to claim 1, characterized in that, The surface of the mounting base that contacts the opening and closing plate is a smooth plane, which has a rectangular ring structure to seal against the four sides of the opening and closing plate.

6. A ceramic filter plate assembly for a ceramic filter tank according to claim 1, characterized in that, The auxiliary backwashing mechanism is located at one end of the positioning seat near the plate base.

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