Filtering device

Abstract

According to the filtering device, a filtering structure comprises a feeding pipeline, a filtering part and a hydraulic part, the filtering part and the hydraulic part are arranged in a stacked mode, a first filtering net and a pit are arranged on the side, close to the hydraulic part, of the filtering part, the orthographic projection of the first filtering net on the filtering part is partially overlapped with the orthographic projection of the pit on the filtering part, and a containing cavity is formed in the hydraulic part; the surface of the side, close to the first filter screen, of the hydraulic part is an elastic extrusion part, the elastic extrusion part forms part of the cavity wall of the containing cavity, the elastic extrusion part is sunken in the direction away from the first filter screen, and a filter cavity is defined by the elastic extrusion part and the first filter screen. The elastic extrusion part is configured to elastically deform in the direction close to the first filter screen under the action of the liquid in the accommodating cavity, the volume of the filter cavity is reduced, and the feeding pipeline is communicated with the filter cavity, so that the filter device can reduce the energy consumption for dehydrating the salt-liquid mixture to a target degree, improve the dehydration effect and reduce the energy consumption. The filtering requirement on the salt-liquid mixture is met.

Description

Technical Field

[0001] The present application relates to the field of filtering technology, and in particular to a filtering device. Background Art

[0002] In the industrial field, a two-stage pusher centrifuge is usually used to evaporate, crystallize and dehydrate the crystallized salt. The centrifuge requires that the solid-liquid ratio in the liquid to be separated is between 30-50%, the crystal particle size is 0.1-0.2mm, and the moisture content of the crystallized salt after dehydration is about 5%.

[0003] However, for wastewater in some special chemical industries, lattice distortion of crystallized salt often occurs during the evaporation and crystallization process due to the enrichment of pollutants in it. Lattice distortion causes the particles of crystallized salt to become finer, so that when workers use centrifuges to dehydrate, a large amount of crystallized salt will leak from the filter, affecting the dehydration effect.

[0004] In the related art, a plate and frame filter press is used to dehydrate the crystallized salt. The plate and frame filter press provides extrusion force through a feed pump to extrude the crystallized salt, and uses the filtering effect of the filter cloth to remove the moisture generated during the extrusion of the crystallized salt. However, the dehydration effect of the plate and frame filter press is poor and it is difficult to meet the demand for filtering moisture in the crystallized salt. Utility Model Content

[0005] Based on this, it is necessary to provide a filtering device to address the problem that the current plate and frame filter press has poor dehydration effect and is difficult to meet the demand for filtering water in crystallized salt.

[0006] A filtering device, comprising:

[0007] At least one filter structure:

[0008] The filtering structure comprises a feed pipe, a filter element and a hydraulic element arranged in layers, a first filter screen and at least one concave pit are arranged on a side of the filter element close to the hydraulic element, the first filter screen is located between the filter element and the hydraulic element, and the orthographic projection of the first filter screen on the filter element partially overlaps with the orthographic projection of the concave pit on the filter element;

[0009] The hydraulic component is provided with a receiving cavity and a liquid inlet communicated with the receiving cavity, the receiving cavity is located on a side of the first filter screen away from the pit, a surface of the hydraulic component on a side close to the first filter screen is an elastic extrusion portion, the elastic extrusion portion constitutes a part of the cavity wall of the receiving cavity, the elastic extrusion portion is recessed in a direction away from the first filter screen, and together with the first filter screen, forms a filter cavity, and the elastic extrusion portion is configured to be elastically deformed in a direction close to the first filter screen under the action of the liquid in the receiving cavity, so as to reduce the volume of the filter cavity;

[0010] The feed pipe is communicated with the filter chamber.

[0011] In one embodiment, a plurality of the pits are provided on a surface of the filter element on one side close to the hydraulic element, the plurality of the pits are arranged at intervals, a connecting groove is provided between any two adjacent pits, one end of the connecting groove is connected to one of the pits, and the other end is connected to another of the pits;

[0012] The orthographic projection of the first filter net on the filter element overlaps with the orthographic projection of the plurality of pits on the filter element.

[0013] In one of the embodiments, the filter element is provided with a liquid outlet, and the liquid outlet is communicated with the pit.

[0014] In one embodiment, the mesh number of the first filter screen is greater than or equal to 500, and the diameter of the filter hole of the first filter screen is less than or equal to 0.01 mm.

[0015] In one of the embodiments, a second filter screen is provided on a side of the elastic extrusion portion close to the first filter screen, and the second filter screen is in contact with a surface of the side of the elastic extrusion portion close to the first filter screen.

[0016] In one embodiment, at least one gas channel is provided on the elastic extrusion portion, and the gas channel connects the filter cavity and the accommodating cavity;

[0017] A regulating valve is provided in the accommodating chamber, and the regulating valve is connected to one end of the gas passage close to the accommodating chamber to regulate the on-off of the gas passage;

[0018] The hydraulic component is provided with a suction port, the suction port is communicated with the accommodating cavity, and the suction port is used to generate negative pressure.

[0019] In one of the embodiments, the filter element is provided with at least one air hole, and the air hole is communicated with the pit.

[0020] In one of the embodiments, the feed pipeline includes a first feed section, one end of which is connected to the filter cavity, and the other end of which passes through the hydraulic component along the stacking direction of the filter component and the hydraulic component.

[0021] In one embodiment, the feed pipeline includes a second feed section, one end of which is connected to the filter cavity, and the other end of which passes through the filter element along the stacking direction of the filter element and the hydraulic element;

[0022] The filtering device comprises a baffle, and the baffle cover is arranged at one end of the second feeding section away from the filtering cavity.

[0023] In one embodiment, the filtering device includes a plurality of the filtering structures, the plurality of filtering structures are stacked along the stacking direction of the filter element and the hydraulic component, and the second feed sections in each of the filtering structures are communicated with the first feed sections in the adjacent filtering structures;

[0024] The baffle is located on one side of the plurality of filtering structures along the stacking direction of the filter element and the hydraulic component, and covers one end of the second feed section in the adjacent filtering structure facing away from the filtering cavity.

[0025] In the filtering device of this embodiment, the salt liquid mixture enters the filtering cavity from the feed pipe. The salt liquid mixture entering the filtering cavity is preliminarily filtered by the first filter screen, and the filtered liquid enters the pit for storage. During this process, the mass ratio of the crystalline salt to the liquid in the salt liquid mixture gradually decreases. When the mass ratio of the crystalline salt to the liquid in the salt liquid mixture decreases to a first preset value, the staff injects the extrusion liquid into the accommodation cavity from the liquid inlet, so that the extrusion liquid entering the accommodation cavity pushes the elastic extrusion part to deform towards the direction close to the first filter screen, reducing the volume of the filtering cavity, and then extruding the salt liquid mixture located in the filtering cavity, and re-filtering the salt liquid mixture with the first filter screen until the mass ratio of the crystalline salt to the liquid in the salt liquid mixture decreases to a second preset value. In summary, in the filtering device of this embodiment, through the primary filtration of the salt liquid mixture by the first filter screen, when the mass ratio of the crystalline salt to the liquid in the salt liquid mixture is relatively high, the mass ratio of the crystalline salt to the liquid in the salt liquid mixture can be quickly reduced to the first preset value, avoiding using the elastic extrusion part to reduce the mass ratio of the crystalline salt to the liquid in the salt liquid mixture to the first preset value, thereby shortening the time required for the filtering device to reduce the mass ratio of the crystalline salt to the liquid in the salt liquid mixture to the second preset value, reducing the energy consumption of the filtering device to dehydrate the salt liquid mixture to the target degree, improving the dehydration effect of the filtering device, and meeting the liquid filtering requirements for the salt liquid mixture. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments or exemplary embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of a filtering device in an embodiment of the present application.

[0028] Figure 2 For Figure 1Cross-sectional view at location A of the shown filtering device.

[0029] Reference numerals:

[0030] Filtering device 1000;

[0031] Filtering structure 1100, feed pipe 1101, first feed section 1101-1, second feed section 1101-2, filter element 1102, first filter net 1103, liquid outlet 1104, air holes 1105, hydraulic component 1106, elastic extrusion part 1106-1, accommodation cavity 1107, liquid inlet 1108, regulating valve 1109, suction port 1110, filtering cavity 1112;

[0032] Baffle 1200. Detailed implementation manners

[0033] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if there appear these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application.

[0035] In addition, if there appear these terms "first", "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there appears the term "plural", the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0036] In this application, unless otherwise clearly defined and limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] In this application, unless otherwise clearly defined and limited, if there is a description such as the first feature being "on" or "under" the second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0039] Please refer to Figure 1 and Figure 2 , Figure 1The structural schematic diagram of a filtering device in an embodiment of the present application is shown. A filtering device 1000 provided in an embodiment of the present application includes: at least one filtering structure 1100. The filtering structure 1100 includes a feed pipeline 1101, a filtering element 1102 and a hydraulic element 1106 arranged in a stacked manner. On one side of the filtering element 1102 close to the hydraulic element 1106, there are provided a first filter screen 1103 and at least one pit (not shown). The first filter screen 1103 is located between the filtering element 1102 and the hydraulic element 1106. The orthographic projection of the first filter screen 1103 on the filtering element 1102 overlaps partially with the orthographic projection of the pit on the filtering element 1102. The hydraulic element 1106 is provided with a receiving cavity 1107 and a liquid inlet 1108 communicating with the receiving cavity 1107. The receiving cavity 1107 is located on the side of the first filter screen 1103 facing away from the pit. The surface of the hydraulic element 1106 close to the first filter screen 1103 is an elastic extrusion part 1106-1. The elastic extrusion part 1106-1 constitutes part of the cavity wall of the receiving cavity 1107. The elastic extrusion part 1106-1 is recessed in a direction away from the first filter screen 1103 and jointly encloses a filtering cavity 1112 with the first filter screen 1103. The elastic extrusion part 1106-1 is configured to be elastically deformed in the direction close to the first filter screen 1103 under the action of the liquid in the receiving cavity 1107 so as to reduce the volume of the filtering cavity 1112. The feed pipeline 1101 communicates with the filtering cavity 1112.

[0040] For a traditional plate-and-frame filter press, it directly dehydrates a salt solution mixture with a relatively high ratio of the mass of crystal salt to the mass of liquid to the target degree, that is, the plate-and-frame filter press is in a working state throughout the entire process of dehydrating the salt solution mixture and squeezes the salt solution mixture, resulting in relatively high energy consumption for the plate-and-frame filter press to dehydrate the salt solution mixture to the target degree, and the dehydration effect of the plate-and-frame filter press is poor, making it difficult to meet the filtering requirements for the liquid in the salt solution mixture.

[0041] In the filtering device 1000 of this embodiment, the salt solution mixture enters the filtering chamber 1112 from the feeding pipeline 1101. The salt solution mixture entering the filtering chamber 1112 is preliminarily filtered by the first filter screen 1103, and the filtered liquid enters the pit for storage. During this process, the mass ratio of the crystalline salt to the liquid in the salt solution mixture gradually decreases. When the mass ratio of the crystalline salt to the liquid in the salt solution mixture decreases to the first preset value, the staff injects an extrusion liquid (not shown) into the accommodating chamber 1107 from the liquid inlet 1108, so that the extrusion liquid entering the accommodating chamber 1107 pushes the elastic extrusion part 1106-1 to deform in the direction close to the first filter screen 1103, reducing the volume of the filtering chamber 1112, and then extruding the salt solution mixture located in the filtering chamber 1112, and re-filtering the salt solution mixture with the first filter screen 1103 until the mass ratio of the crystalline salt to the liquid in the salt solution mixture decreases to the second preset value. In summary, in the filtering device 1000 of this embodiment, through the primary filtration of the salt solution mixture by the first filter screen 1103, when the mass ratio of the crystalline salt to the liquid in the salt solution mixture is relatively high, the mass ratio of the crystalline salt to the liquid in the salt solution mixture can be quickly reduced to the first preset value, avoiding using the elastic extrusion part 1106-1 to reduce the mass ratio of the crystalline salt to the liquid in the salt solution mixture to the first preset value, thereby shortening the time required for the filtering device 1000 to reduce the mass ratio of the crystalline salt to the liquid in the salt solution mixture to the second preset value, reducing the energy consumption of the filtering device 1000 to dehydrate the salt solution mixture to the target degree, improving the dehydration effect of the filtering device 1000, and meeting the liquid filtering requirements for the salt solution mixture.

[0042] It should be further noted that the first preset value is 60%, the second preset value is 35%, and the pressure of the extrusion liquid is between 30 bar and 50 bar.

[0043] Please refer to Figure 1 And Figure 2 , in some embodiments, a plurality of pits are provided on the surface of the filter element 1102 close to the hydraulic member 1106. The plurality of pits are arranged at intervals, and a communication groove (not shown) is provided between any two adjacent pits. One end of the communication groove communicates with one pit, and the other end communicates with another pit. The orthographic projection of the first filter screen 1103 on the filter element 1102 overlaps with the orthographic projection of the plurality of pits on the filter element 1102.

[0044] In this embodiment, by providing a plurality of pits arranged at intervals to increase the space for storing the liquid separated from the saline solution mixture; by providing a communication groove between any two adjacent pits, one end of the communication groove communicates with one pit and the other end communicates with another pit, so that the liquid stored in one pit can enter another pit; by the orthographic projection of the first filter screen 1103 on the filter element 1102 overlapping with the orthographic projection of the plurality of pits on the filter element 1102, so as to facilitate the support of the first filter screen 1103 by the part of the filter element 1102 located between two adjacent pits, and to prevent the first filter screen 1103 from being significantly recessed in the direction away from the hydraulic member 1106 when the elastic pressing portion 1106-1 presses the saline solution mixture, ensuring the pressing force between the first filter screen 1103 and the elastic pressing portion 1106-1, and further improving the pressing effect of the elastic pressing portion 1106-1 on the saline solution mixture in the filter chamber 1112.

[0045] In some embodiments, the orthographic projection of the first filter screen 1103 on the filter element 1102 completely overlaps with the orthographic projection of the plurality of pits on the filter element 1102.

[0046] In other embodiments, a plurality of pits are provided on the surface of the filter element 1102 close to the hydraulic member 1106, the plurality of pits are arranged at intervals, and at least one set of adjacent two pits is provided with a communication groove, one end of the communication groove communicates with one pit and the other end communicates with another pit, and the orthographic projection of the first filter screen 1103 on the filter element 1102 overlaps with the orthographic projection of the plurality of pits on the filter element 1102.

[0047] Please refer to Figure 1 and Figure 2 In some embodiments, a liquid outlet 1104 is provided on the filter element 1102, and the liquid outlet 1104 communicates with the pit.

[0048] In this embodiment, by providing a liquid outlet 1104 on the filter element 1102 and the liquid outlet 1104 communicating with the pit, when the pit is full of liquid, the staff can open the liquid outlet 1104 to empty the liquid separated from the saline solution mixture in the pit, and then close the liquid outlet 1104, thereby facilitating the pit to store the liquid subsequently separated from the saline solution mixture by the first filter screen 1103.

[0049] In some embodiments, a plurality of liquid outlets 1104 are provided on the filter element 1102, the plurality of liquid outlets 1104 are arranged in one-to-one correspondence with the plurality of pits, and each liquid outlet 1104 communicates with the corresponding pit.

[0050] Please refer to Figure 1 and Figure 2, in some embodiments, the mesh number of the first filter screen 1103 is greater than or equal to 500, and the diameter of the filter holes of the first filter screen 1103 is less than or equal to 0.01 mm.

[0051] In this embodiment, by setting the mesh number of the first filter screen 1103 to be greater than or equal to 500 and the diameter of the filter holes of the first filter screen 1103 to be less than or equal to 0.01 mm, the filtering effect of the first filter screen 1103 can be improved, and it can be avoided that the crystal salts with smaller sizes in the salt solution mixture enter the concave pits through the filter holes of the first filter screen 1103.

[0052] Please refer to Figure 1 and Figure 2 , in some embodiments, a second filter screen (not shown) is provided on the side of the elastic extrusion part 1106-1 close to the first filter screen 1103, and the second filter screen is attached to the surface of the elastic extrusion part 1106-1 on the side close to the first filter screen 1103.

[0053] In this embodiment, by attaching the second filter screen to the surface of the elastic extrusion part 1106-1 on the side close to the first filter screen 1103, it can be prevented that when the elastic extrusion part 1106-1 extrudes the salt solution mixture, the crystal salts in the salt solution mixture stick to the surface of the elastic extrusion part 1106-1 on the side close to the first filter screen 1103.

[0054] In some embodiments, the mesh number of the second filter screen is greater than or equal to 500, and the diameter of the filter holes of the second filter screen is less than or equal to 0.01 mm.

[0055] Please refer to Figure 1 and Figure 2 , in some embodiments, at least one gas channel (not shown) is provided on the elastic extrusion part 1106-1. The gas channel connects the filter cavity 1112 and the accommodation cavity 1107. A regulating valve 1109 is provided in the accommodation cavity 1107. The regulating valve 1109 is connected to one end of the gas channel close to the accommodation cavity 1107 to regulate the on-off of the gas channel. A suction port 1110 is provided on the hydraulic part 1106. The suction port 1110 is communicated with the accommodation cavity 1107, and the suction port 1110 is used to generate negative pressure.

[0056] In this embodiment, by providing a gas passage to connect the filtration chamber 1112 and the accommodation chamber 1107, the regulating valve 1109 adjusts the on-off state of the gas passage. The suction port 1110 is in communication with the accommodation chamber 1107. The suction port 1110 is used to generate a negative pressure. When the mass ratio of the crystalline salt to the liquid in the salt solution mixture is reduced to a second preset value, the staff can drain the extrusion liquid in the accommodation chamber 1107 from the liquid inlet 1108, and operate the regulating valve 1109 to open the gas passage. By means of the negative pressure generated in the accommodation chamber 1107 by the suction port 1110, the liquid in the salt solution mixture in the filtration chamber 1112 enters the gas passage through the filtration holes of the second filter screen, and the liquid in the salt solution mixture enters the accommodation chamber 1107 from the gas passage, realizing the final filtration of the liquid in the salt solution mixture in the filtration chamber 1112, reducing the mass ratio of the crystalline salt to the liquid in the salt solution mixture from the second preset value to a third preset value, and improving the filtration effect of the filtration device 1000.

[0057] It should be further noted that the third preset value is 5%.

[0058] In some embodiments, the orthographic projection of the second filter screen on the hydraulic component 1106 at least partially overlaps with the orthographic projection of the gas passage on the hydraulic component 1106.

[0059] In some embodiments, a plurality of gas passages are provided on the elastic extrusion part 1106-1. Each gas passage connects the filtration chamber 1112 and the accommodation chamber 1107. A plurality of regulating valves 1109 are provided in the accommodation chamber 1107. The plurality of regulating valves 1109 are arranged in one-to-one correspondence with the plurality of gas passages. Each regulating valve 1109 is connected to one end of the corresponding gas passage close to the accommodation chamber 1107 to adjust the on-off state of the corresponding gas passage.

[0060] In some embodiments, the orthographic projection of the second filter screen on the hydraulic component 1106 completely overlaps with the orthographic projections of the plurality of gas passages on the hydraulic component 1106 at the same time.

[0061] Please refer to Figure 1 And Figure 2 In some embodiments, at least one air hole 1105 is provided on the filter element 1102, and the air hole 1105 is in communication with the concave pit.

[0062] In this embodiment, at least one air hole 1105 is provided on the filter element 1102, and the air hole 1105 communicates with the pit. When a negative pressure is generated in the receiving cavity 1107 at the suction port 1110, external gas can enter the pit through the air hole 1105 under the action of the negative pressure in the receiving cavity 1107, enter the filtering cavity 1112 from the filtering holes of the first filter net 1103 in the pit, and then carry the liquid in the salt liquid mixture to enter the gas channel from the filtering holes of the second filter net, enter the receiving cavity 1107 from the gas channel, and further finally filter the liquid in the salt liquid mixture in the filtering cavity 1112.

[0063] In some embodiments, a plurality of air holes 1105 are provided on the filter element 1102, and each air hole 1105 communicates with the pit.

[0064] In some embodiments, a plurality of air holes 1105 are provided on the filter element 1102, and the plurality of air holes 1105 are arranged in one-to-one correspondence with a plurality of pits, and each air hole 1105 communicates with the corresponding pit.

[0065] Please refer to Figure 1 and Figure 2 , in some embodiments, the feed pipe 1101 includes a first feed section 1101-1. One end of the first feed section 1101-1 communicates with the filtering cavity 1112, and the other end penetrates through the hydraulic member 1106 along the stacking direction of the filter element 1102 and the hydraulic member 1106.

[0066] In this embodiment, the salt liquid mixture enters the filtering cavity 1112 through the first feed section 1101-1.

[0067] In some embodiments, the feed pipe 1101 includes a plurality of first feed sections 1101-1. One end of each first feed section 1101-1 communicates with the filtering cavity 1112, and the other end penetrates through the hydraulic member 1106 along the stacking direction of the filter element 1102 and the hydraulic member 1106.

[0068] Please refer to Figure 1 and Figure 2 , in some embodiments, the feed pipe 1101 includes a second feed section 1101-2. One end of the second feed section 1101-2 communicates with the filtering cavity 1112, and the other end penetrates through the filter element 1102 along the stacking direction of the filter element 1102 and the hydraulic member 1106. The filtering device 1000 includes a baffle 1200, and the baffle 1200 covers one end of the second feed section 1101-2 facing away from the filtering cavity 1112.

[0069] In this embodiment, by providing the baffle 1200 to cover one end of the second feed section 1101-2 facing away from the filtering cavity 1112, it is possible to prevent the salt liquid mixture entering the filtering cavity 1112 through the first feed section 1101-1 from leaving the filtering cavity 1112 through the second feed section 1101-2.

[0070] In some embodiments, the feed pipe 1101 includes a plurality of second feed segments 1101-2. Each second feed segment 1101-2 has one end communicating with the filtration chamber 1112 and the other end penetrating through the filter element 1102 along the stacking direction of the filter element 1102 and the hydraulic component 1106.

[0071] Please refer to Figure 1 and Figure 2 , in some embodiments, the filtration device 1000 includes a plurality of filtration structures 1100. The plurality of filtration structures 1100 are stacked along the stacking direction of the filter element 1102 and the hydraulic component 1106. The second feed segments 1101-2 in each filtration structure 1100 communicate with the first feed segments 1101-1 in the adjacent filtration structures 1100. The baffle 1200 is located on one side of the plurality of filtration structures 1100 along the stacking direction of the filter element 1102 and the hydraulic component 1106 and covers one end of the second feed segment 1101-2 in the adjacent filtration structures 1100 facing away from the filtration chamber 1112.

[0072] In this embodiment, by stacking the plurality of filtration structures 1100 along the stacking direction of the filter element 1102 and the hydraulic component 1106 and making the second feed segments 1101-2 in each filtration structure 1100 communicate with the first feed segments 1101-1 in the adjacent filtration structures 1100, the filtration device 1000 can filter a relatively large amount of salt liquid mixture simultaneously by means of the filtration chambers 1112 in the plurality of filtration structures 1100, thereby improving the filtration capacity of the filtration device 1000. By having the baffle 1200 located on one side of the plurality of filtration structures 1100 along the stacking direction of the filter element 1102 and the hydraulic component 1106 and covering one end of the second feed segment 1101-2 in the adjacent filtration structures 1100 facing away from the filtration chamber 1112, it is possible to prevent the salt liquid mixture entering the plurality of filtration chambers 1112 from leaving the filtration chamber 1112 through the second feed segment 1101-2 and being discharged from the filtration device 1000.

[0073] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0074] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A filtering device, characterized in that, The filtering device comprises at least one filtering structure: The filtering structure comprises a feed pipe, a filter element and a hydraulic element arranged in layers, a first filter screen and at least one concave pit are arranged on a side of the filter element close to the hydraulic element, the first filter screen is located between the filter element and the hydraulic element, and the orthographic projection of the first filter screen on the filter element partially overlaps with the orthographic projection of the concave pit on the filter element; The hydraulic component is provided with a receiving cavity and a liquid inlet communicated with the receiving cavity, the receiving cavity is located on a side of the first filter screen away from the pit, a surface of the hydraulic component on a side close to the first filter screen is an elastic extrusion portion, the elastic extrusion portion constitutes a part of the cavity wall of the receiving cavity, the elastic extrusion portion is recessed in a direction away from the first filter screen, and together with the first filter screen, forms a filter cavity, and the elastic extrusion portion is configured to be elastically deformed in a direction close to the first filter screen under the action of the liquid in the receiving cavity, so as to reduce the volume of the filter cavity; The feed pipe is communicated with the filter chamber.

2. The filtering device according to claim 1, wherein, A plurality of the pits are arranged on a surface of one side of the filter element close to the hydraulic element, the plurality of the pits are arranged at intervals, a connecting groove is provided between any two adjacent pits, one end of the connecting groove is connected to one of the pits, and the other end is connected to another of the pits; The orthographic projection of the first filter net on the filter element overlaps with the orthographic projection of the plurality of pits on the filter element.

3. The filtering device according to claim 1, characterized in that, The filter element is provided with a liquid outlet, and the liquid outlet is communicated with the pit.

4. The filtering device according to claim 1, characterized in that, The mesh number of the first filter net is greater than or equal to 500, and the diameter of the filter hole of the first filter net is less than or equal to 0.01 mm.

5. The filtering device according to claim 1, characterized in that, A second filter screen is provided on a side of the elastic extrusion portion close to the first filter screen, and the second filter screen is in contact with a surface of the side of the elastic extrusion portion close to the first filter screen.

6. The filtering device according to claim 1, wherein At least one gas channel is provided on the elastic extrusion portion, and the gas channel communicates the filter cavity with the accommodating cavity; A regulating valve is provided in the accommodating chamber, and the regulating valve is connected to one end of the gas passage close to the accommodating chamber to regulate the on-off of the gas passage; The hydraulic component is provided with a suction port, the suction port is communicated with the accommodating cavity, and the suction port is used to generate negative pressure.

7. The filtering device according to claim 6, wherein The filter element is provided with at least one air hole, and the air hole is communicated with the pit.

8. The filtering device according to any one of claims 1 to 7, characterized in that, The feed pipeline comprises a first feed section, one end of which is communicated with the filter cavity, and the other end of which penetrates the hydraulic component along the stacking direction of the filter component and the hydraulic component.

9. The filtering device according to claim 8, characterized in that, The feed pipeline comprises a second feed section, one end of which is communicated with the filter cavity, and the other end of which penetrates the filter element along the stacking direction of the filter element and the hydraulic element; The filtering device comprises a baffle, and the baffle cover is arranged at one end of the second feeding section away from the filtering cavity.

10. The filtering device according to claim 9, characterized in that, The filtering device comprises a plurality of filtering structures, wherein the plurality of filtering structures are stacked along the stacking direction of the filtering element and the hydraulic element, and the second feed section in each filtering structure is connected to the first feed section in the adjacent filtering structure; The baffle is located on one side of the plurality of filter structures along the stacking direction of the filter element and the hydraulic element, and covers an end of the second feed section in the adjacent filter structure away from the filter cavity.

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