Micropore filtration and concentration equipment

Abstract

The utility model relates to the technical field of slurry concentration, in particular to microporous filtration concentration equipment, which comprises a tank body, a filter component and a clear water outlet pipeline valve group, a liquid inlet pipeline valve group, a feeding pipeline valve group and a gas inlet pipeline valve group are arranged on the tank body, and the filter component comprises a plurality of layers of first filter materials. The multiple layers of first filter materials are horizontally arranged in the tank body at intervals up and down, the clearing pipeline valve group comprises multiple groups of clearing valves, the multiple groups of clearing valves are respectively communicated with each layer of first filter material of the filter assembly, and a flow meter is arranged on a downstream confluence pipeline of the clearing pipeline valve group and is used for detecting the flow of clear liquid; the filter assemblies in the tank body are horizontally arranged at intervals up and down, so that the longitudinal linkage relationship and the transverse linkage relationship among the filter materials are broken through by adopting the horizontal arrangement, and each filter material is independently controlled; the problems of low filtering efficiency and poor filtering caused by simultaneous stopping of filtering of the multi-layer filtering materials of the layer due to closing of the corresponding layer of filtering materials after the filtering materials are exposed out of the liquid level are solved.

Description

Technical Field

[0001] This utility model relates to the field of slurry concentration technology, and in particular to a microporous filtration concentration device. Background Technology

[0002] In the production processes of lithium battery materials, hydrometallurgy, food, biopharmaceuticals, cosmetics, and chemicals, it is often necessary to filter and concentrate liquids containing solids to increase the solid content of the liquid. Existing microporous thickener filters generally adopt a multi-level, circular arrangement of filter elements arranged vertically around a stirring paddle, with multiple layers arranged in height. This layout allows for multiple filter elements to be arranged in both the radial and axial directions to increase the filtration area.

[0003] However, in the aforementioned ring-shaped vertical arrangement, during the fluctuations of the liquid mixture and the rise and fall of the concentrated liquid level, the filter element at the top is prone to protruding above the liquid surface. Once the filter element is exposed, gas will escape rapidly, leading to a decrease in the concentration and filtration effect and a large gas consumption. If the purging of the corresponding layer of filter elements is closed, although gas escape can be reduced, it also means that multiple layers of filter elements in that layer cannot be purged, reducing the filtration area and affecting the filtration effect and efficiency.

[0004] It should be noted that the information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model, and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] To address the technical problem of low effective utilization rate of filter elements in existing filtration and concentration equipment, this utility model provides a microporous filtration and concentration device. This device includes a tank, a filter assembly, and a discharge pipeline valve group. The filter assembly comprises multiple layers of first filter media, which are horizontally arranged and spaced vertically within the tank. The discharge pipeline valve group includes multiple sets of discharge valves, each connected to a layer of the first filter media in the filter assembly. A flow meter is installed downstream of the discharge pipeline valve group to detect the flow rate of the discharged liquid.

[0006] Furthermore, the dimensions of the first filter material differ at different levels.

[0007] Furthermore, the size of the first filter material in the lower layer is larger than that of the first filter material in the upper layer.

[0008] Furthermore, the filtration diameter of the first filter material is 0.1 μm to 100 μm.

[0009] Furthermore, the tank body is equipped with a liquid inlet valve group, a feed inlet valve group, and an air inlet valve group.

[0010] Furthermore, the microporous filtration and concentration device also includes a level gauge, which is installed on the tank.

[0011] Furthermore, the microporous filtration and concentration device also includes a pressure gauge, which is mounted on the tank.

[0012] Furthermore, the microporous filtration and concentration equipment also includes a stirring device that extends into the tank.

[0013] Furthermore, the microporous filtration and concentration equipment also includes a backflush pipeline valve assembly, one end of which is connected to the air inlet pipeline valve assembly, and the other end of which is connected to each layer of the first filter material.

[0014] Furthermore, the backflush pipeline valve assembly includes multiple sets of backflush valves, which are respectively disposed between each set of discharge valves and each layer of the first filter material.

[0015] Based on the above, the microporous filtration and concentration device provided by this utility model, compared with the prior art, adopts a vertically spaced and horizontally arranged filtration component inside the tank, which breaks the vertical and horizontal linkage relationship between each filter material, realizes independent control of each filter material, and avoids the problem of low filtration efficiency and poor filtration effect caused by the filtration of the corresponding layer of filter material being shut off after the filter material is exposed to the liquid surface, which would cause multiple layers of filter materials in that layer to stop filtering at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Unless otherwise specified, the positional relationships shown in the drawings in the following description are based on the direction in which the components are drawn in the figures.

[0017] Figure 1 This is a cross-sectional structural diagram of a filtration and concentration device in the prior art.

[0018] Figure 2 This is a schematic diagram of the structure of a microporous filtration and concentration device provided in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of a microporous filtration and concentration device provided in the second embodiment of the present invention.

[0020] Figure label:

[0021] Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof mean "at least comprising."

[0024] First, to facilitate a full understanding of the technical solution of this application, existing filtration and concentration equipment will be analyzed, such as... Figure 1 As shown, the existing solution uses multiple layers of filter elements arranged vertically around the agitator from the inside out. In order to increase the filtration area, at least two layers of filter elements are set in the longitudinal direction (usually two layers).

[0025] However, during actual implementation, the slurry level fluctuates as stirring or filtration proceeds, causing the top filter element to easily protrude above the liquid surface, leading to rapid gas escape. Current solutions can only prevent gas escape by shutting off the purging of that filter layer, but this results in the simultaneous shutdown of multiple filter elements both inside and outside that layer, significantly reducing the filtration area and leading to low filtration efficiency and effect.

[0026] To address the technical problem of low effective utilization rate of filter elements in existing filtration and concentration equipment, or to achieve at least one or more of the aforementioned advantages, an embodiment of this utility model provides a microporous filtration and concentration device. For example... Figure 2 As shown, the microporous filtration and concentration device includes a tank 10, a filter assembly 20, and an outlet pipeline valve group 30.

[0027] The tank 10 can be equipped with an inlet valve group 40, a feed valve group 50, and an air inlet valve group 60, which are used to introduce water, slurry, and a given air pressure, respectively. During the filtration process, this microporous filtration and concentration equipment continuously feeds in and discharges slurry, and the slurry level inside the tank 10 changes in real time. Therefore, a level gauge 70 can be installed on the tank 10 to detect the slurry level in real time. Based on the detection result of the level gauge 70, step-wise control of the corresponding slurry discharge circuit can be achieved to prevent gas escape.

[0028] Preferably, the inlet pipeline valve group 40 can be multiple groups, each used for different liquids such as water and cleaning acid, all of which are within the protection scope of this application.

[0029] Furthermore, a stirring device 80 may be provided on the tank body 10. The stirring device 80 is driven by a motor and extends into the tank body 10. The stirring device 80 can drive the slurry to flow, thereby keeping the particles in the overall flow field inside the tank body 10 fully mixed and avoiding sedimentation. Preferably, the stirring part 81 of the stirring device 80 can be located in the middle of the tank body 10 to uniformly distribute the overall flow field.

[0030] In some preferred embodiments, a pressure gauge 90 may be installed on the tank 10 to monitor the pressure inside the tank 10 in real time.

[0031] The filter assembly 20 includes multiple layers of first filter media 21. The multiple layers of first filter media 21 are arranged horizontally and spaced vertically within the tank 10. The discharge pipeline valve assembly 30 includes multiple sets of discharge valves 31. The multiple sets of discharge valves 31 are respectively connected to each layer of first filter media 21 of the filter assembly 20.

[0032] The first filter material 21 can be a sintered microporous filter material made of organic, inorganic, or metallic materials, etc., and this application does not limit this. Preferably, the filtration diameter of the first filter material 21 is 0.1 μm to 100 μm.

[0033] In some preferred embodiments, the first filter media 21 can be a single unit of filter media in the form of rods, plates, or other suitable shapes, or it can be a filter media assembly formed by combining multiple single unit filter media. Preferably, the size specifications of the first filter media 21 in different layers can be different. Specifically, the size specifications of the first filter media 21 in the lower layers are larger than those in the upper layers to improve utilization and filtration efficiency. Of course, the size specifications of the first filter media 21 can be adjusted according to actual needs.

[0034] In specific implementation, the filter assembly 20 comprises four layers of first filter media 21A, 21B, 21C, and 21D. The first filter media 21A, 21B, 21C, and 21D are spaced apart from each other from top to bottom and arranged horizontally. The discharge pipeline valve assembly 30 comprises four sets of discharge valves 31A, 31B, 31C, and 31D. Discharge valve 31A connects to first filter media 21A. Discharge valve 31B connects to first filter media 21B. Discharge valve 31C connects to first filter media 21C. Discharge valve 31D connects to first filter media 21D.

[0035] Based on the liquid level of the slurry in the tank 10, the discharge valve 31 corresponding to the first filter material 21 that is exposed above the liquid surface is closed. Other first filter materials 21 that are not exposed above the liquid surface continue to discharge without being affected. By using the horizontally arranged first filter materials 21, the vertical linkage between each layer of first filter materials 21 is interrupted, and there is no radial linkage between each layer of first filter materials 21. This avoids the problem that the filtration area is greatly reduced because the discharge valve 31 of a single layer is closed, causing multiple layers of first filter materials 21 in that layer to stop filtering at the same time.

[0036] Of course, the specific number of layers of the first filter material 21 and the specific number of sets of discharge valves 31 can be adjusted according to actual needs and are not limited thereto. This embodiment is only illustrated by using four layers of the first filter material 21 and four sets of discharge valves 31.

[0037] Based on the above, a flow meter 100 is installed at the downstream manifold of the discharge line valve assembly 30. The flow meter 100 is used to detect the real-time flow rate in the downstream manifold of the discharge line valve assembly 30. The downstream manifold of the discharge line valve assembly 30 contains the filtered clear liquid and may also contain gas that escapes after the first filter material 21 is exposed above the liquid surface. When the first filter material 21 is not exposed above the slurry surface, the downstream of the discharge line valve assembly 30 mainly contains the filtered clear liquid, and the flow rate data shows a fluctuating pattern as the liquid flows.

[0038] If the first filter material 21 is exposed above the liquid surface, gas will escape into the downstream pipeline of the discharge pipeline valve group 30, and the flow rate data will show a momentary jump. Based on the detection data of the level gauge 70, the corresponding discharge valve 31 will be closed to shut down the discharge circuit and prevent gas from escaping.

[0039] Specifically, the filtration and concentration process of this microporous filtration and concentration equipment is a cyclical, layered filtration process: when the slurry level in the tank 10 is high, multiple sets of filtration valves 31 are fully open for filtration and filtration; as the stirring device 80 stirs or the filtration and filtration continues, the slurry level fluctuates and drops. The level gauge 70 detects the slurry level in the tank 10 in real time, and at the same time, the flow meter 100 monitors the flow data. If the flow data jumps instantaneously, it indicates that the first filter material 21 near the corresponding liquid level is exposed above the liquid surface and the filtration has failed. The filtration valve 31 corresponding to the first filter material 21 is immediately closed to reduce gas escape and continue concentration and filtration; as the filtration loop is closed one after another, the filtration efficiency decreases, and the liquid level begins to rise from a low level to a high level. The liquid level is detected in real time and the corresponding filtration valve 31 is opened for filtration and filtration, and this cycle continues.

[0040] In some preferred embodiments, the microporous filtration and concentration device further includes a backflush pipeline valve assembly 110. One end of the backflush pipeline valve assembly 110 is connected to the inlet pipeline valve assembly 60, and the other end of the backflush pipeline valve assembly 110 is connected to each layer of the first filter media 21. A pressure relief valve 120 is provided on the tank body 10. In specific implementations, the backflush pipeline valve assembly 110 includes multiple sets of backflush valves 111, which are respectively arranged between each set of discharge valves 31 and each layer of the first filter media 21.

[0041] As filtration continues, solids in the slurry adhere to the surface of the first filter media 21, resulting in a decrease in the flow rate of the filtered liquid and a reduction in filtration efficiency. At this point, the backflush pipeline valve group 110 can be activated to perform a cleaning process. The different contact times and filtration times of the first filter media 21 in different layers can be adjusted by using liquid level detection, filtration flow rate, and control frequency data of the filtration valve 31 to stagger the cleaning of different filtration loops. Under the premise of continuous filtration, the filtration status of each layer of the first filter media 21 is maintained, which is beneficial to filtration efficiency and filtration effect.

[0042] Of course, the specific number of backflush valves 111 can be adjusted according to the actual number of layers required for the first filter material 21, and there is no limitation on this.

[0043] In a modified embodiment, such as Figure 3 As shown, the filter assembly 20 also includes multi-layered second filter media 22. The multi-layered second filter media 22 are located below the first filter media 21. The multi-layered second filter media 22 are arranged vertically, spaced apart from each other from the inside out. Each layer of the second filter media 22 is connected to multiple sets of backflush valves 31. Each layer of the second filter media 22 is also connected to the backflush pipeline valve assembly 110.

[0044] The second filter material 22 can be a sintered microporous filter material made of organic, inorganic, or metallic materials, etc., and this application does not impose any limitations on it. Preferably, the filtration diameter of the second filter material 22 is 0.1 μm to 100 μm.

[0045] In some preferred embodiments, the second filter material 22 can be a single unit of filter material in the form of a rod, plate, or other suitable shape, or it can be a filter material assembly formed by combining multiple single unit filter materials. Preferably, the second filter material 22 is larger than the first filter material 21, and has a larger filtration area.

[0046] It should be noted that, in this application, "multi-layer" refers to multiple layers in the vertical direction, and "multi-level" refers to multiple levels in the radial direction.

[0047] In some preferred embodiments, the filtration and concentration method of the microporous filtration and concentration device includes the following steps:

[0048] The slurry is fed in through the liquid inlet valve group 40 and the feed valve group 50, and the gas is introduced through the air inlet valve group 60 at a given pressure for filtration and cleaning.

[0049] The stirring device 80 stirs the slurry to prevent sedimentation and to make the slurry uniform, so that the slurry is dispersed and fully contacts the first filter material 21 and the second filter material 22.

[0050] The liquid level and discharge flow rate in the tank 10 are detected in real time by the liquid level gauge 70 and the flow meter 100. The corresponding discharge valve 31 is selectively opened or closed according to the liquid level and discharge flow rate to prevent gas from escaping.

[0051] Set a running time threshold or an effluent flow rate threshold. When the set time threshold is reached or the effluent flow rate is lower than the set threshold, open the backflush regeneration valve group 110 to ensure the filtration status of the first filter media 21 and the second filter media 22.

[0052] In some embodiments, taking the existing 6m³ ​​mixing tank and 25m² filter element microporous filtration equipment as an example, when the same effluent flow rate requirement is achieved, the above-mentioned microporous filtration concentration equipment can reduce the equipment volume to less than 5m³, the filter element filtration area to 14m², and the gas escape loss to 20% of the original.

[0053] In summary, the microporous filtration and concentration device provided by this utility model, compared with the prior art, adopts a vertically spaced and horizontally arranged filtration component inside the tank, which breaks the vertical and horizontal linkage relationship between the filter media, realizes independent control of each filter media, and avoids the problem of low filtration efficiency and poor filtration effect caused by multiple layers of filter media in that layer stopping filtration simultaneously due to the closure of the corresponding filter media after the filter media is exposed to the liquid surface.

[0054] Although this document frequently uses terms such as filter assembly and outlet valve group, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0055] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of this utility model can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A micro-porous filtration concentration apparatus, characterized by: The application relates to a micro-pore filtering and concentrating device. The device comprises a tank body; A filtering assembly comprises a plurality of layers of first filtering materials, which are horizontally and vertically spaced in the tank body; A clear outlet pipeline valve group comprises a plurality of groups of clear outlet valves, which are respectively communicated with the layers of first filtering materials of the filtering assembly, and a flow meter is arranged downstream of the clear outlet pipeline valve group to detect the flow in the clear outlet pipeline valve group.

2. The micro-porous filtration concentration apparatus of claim 1, wherein: The sizes of the first filtering materials at different levels are different.

3. The micro-porous filtration concentration apparatus of claim 1, wherein: The size of the first filtering material at a lower level is larger than that of the first filtering material at a higher level.

4. The micro-porous filtration concentration apparatus according to any one of claims 1-3, wherein: The filtering diameter of the first filtering material is greater than or equal to 0.1 microns.

5. The micro-porous filtration concentration apparatus of claim 1, wherein: The tank body is provided with an inlet pipeline valve group, a feed pipeline valve group and an air inlet pipeline valve group.

6. The micro-porous filtration concentration apparatus of claim 1, wherein: The micro-pore filtering and concentrating device further comprises a liquid level meter arranged on the tank body.

7. The micro-porous filtration concentration apparatus of claim 1, wherein: The micro-pore filtering and concentrating device further comprises a pressure gauge arranged on the tank body.

8. The micro-porous filtration concentration apparatus of claim 1, wherein: The micro-pore filtering and concentrating device further comprises a stirring device which extends into the tank body.

9. The micro-porous filtration concentration apparatus of claim 5, wherein: The micro-pore filtering and concentrating device further comprises a back flushing pipeline valve group, one end of which is communicated with the air inlet pipeline valve group, and the other end of which is respectively communicated with the layers of first filtering materials.

10. The micro-porous filtration concentration apparatus of claim 9, wherein: The back flushing pipeline valve group comprises a plurality of groups of back flushing valves, which are respectively arranged between the groups of clear outlet valves and the layers of first filtering materials.

Images