Suspended filter bag and filter press

Abstract

The utility model provides a suspended filter bag and a filter press, and belongs to the technical field of solid-liquid separation equipment, the suspended filter bag comprises a filter bag main body, the filter bag main body comprises two main filter surfaces which are oppositely arranged, two ends of the two main filter surfaces are connected to form a filter cavity, the filter cavity is used for accommodating a to-be-filtered object, the filter bag main body is provided with an opening communicated with the filter cavity, and the opening is communicated with the filter cavity. And the opening is used for at least allowing to-be-filtered materials to enter the filter cavity. The bottom end of the filter bag main body is an opening, and the opening is used for being closed when the filter bag main body is in a feeding or filter pressing state and being open after filter pressing of the filter bag main body is completed, so that a filter cake formed by filter pressing in the filter cavity is discharged from the opening. In other words, the two oppositely-arranged main filtering faces form the filtering cavity with the opening in the bottom, and the filtering cavity is used for containing liquid to be filtered. Due to the opening in the bottom end, a filter cake can be easily removed after filter pressing is completed, a closed state can be kept during feeding or filter pressing, and material leakage is prevented. The maintenance cost is reduced, and the filter pressing efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of solid-liquid separation equipment, and particularly to a hanging filter bag and a filter press. Background Art

[0002] In the solid-liquid separation industry, separating the solid-liquid mixed material into solid and liquid parts is a very important and necessary step.

[0003] In a traditional filter press, several filter plates are often used, and two adjacent filter plates are sealed to form a filter cavity. When the filter press starts to work, under a certain pressure maintained by a hydraulic cylinder, the material to be filtered is injected into the filter cavity from one end. Under the action of the feeding pressure, the liquid penetrates the filter cloth, while the solid particles are retained on the filter cloth and gradually form a filter cake. However, the filter cavity of the traditional filter press feeds from the outside to the inside, and relies on the feeding pressure and the hydraulic cylinder pressure to oppose each other to form a filter cake. For limited pressure-bearing capacity, as the material to be filtered introduced increases, the filter cake gradually thickens, and the penetration speed of the liquid will gradually decrease, and the filtering efficiency will also decrease accordingly. Summary of the Utility Model

[0004] The embodiments of the present application provide a hanging filter bag and a filter press, which solve the problem that the liquid to be filtered needs to overcome the resistance of the filter cake and needs to be driven by an external pressure to enter the filter cavity between two adjacent filter plates. And as the thickness of the filter cake increases, the resistance of the liquid to be filtered penetrating the filter cake increases accordingly, resulting in a decrease in the filtering efficiency.

[0005] The embodiments of the present application provide the following technical solutions to solve the above technical problems:

[0006] The embodiments of the present application provide a hanging filter bag, including:

[0007] A filter bag body, the filter bag body includes two main filtering surfaces arranged oppositely, and both ends of the two main filtering surfaces are connected to form a filter cavity for accommodating the material to be filtered. An opening communicating with the filter cavity is provided on the filter bag body, and the opening is used for at least allowing the material to be filtered to enter the filter cavity;

[0008] The bottom end of the filter bag body is an open end, and the open end is used to be in a closed state when the filter bag body is in the feeding or filter pressing process, and is used to be in an open state after the filter pressing of the filter bag body is completed, so that the filter cake formed by filter pressing in the filter cavity is unloaded from the open end.

[0009] Advantages of the embodiments of the present application: The hanging filter bag provided by the embodiments of the present application includes a filter bag body. The filter bag body includes two main filter surfaces arranged oppositely. The two ends of the two main filter surfaces are connected to form a filter cavity for accommodating the material to be filtered. An opening communicating with the filter cavity is provided on the filter bag body, and the opening is used for at least allowing the material to be filtered to enter the filter cavity. The bottom end of the filter bag body is an open mouth, which is used to be in a closed state when the filter bag body is in the feeding or pressure filtration process, and is used to be in an open state after the pressure filtration of the filter bag body is completed, so that the filter cake formed by pressure filtration in the filter cavity is discharged from the open mouth. That is to say, the two main filter surfaces arranged oppositely form a filter cavity with an open mouth at the bottom, and the filter cavity is used to hold the liquid to be filtered. The open mouth at the bottom end not only facilitates the easy removal of the filter cake after pressure filtration is completed, but also can maintain a closed state during feeding or pressure filtration to prevent material leakage. The operation process is simplified, the maintenance cost is reduced, and the pressure filtration efficiency is improved.

[0010] Traditional plate and frame filter presses work in a low-pressure environment. Their working principle is mainly to separate the filtrate through the opposite action of squeezing and sealing force. However, there are some problems with this equipment in high-pressure scenarios. First of all, as the pressure increases, the sealing difficulty will also increase accordingly, and the phenomenon of spraying materials is likely to occur. This situation will not only affect the separation effect of the filtrate, but also may cause the equipment to be unable to achieve unmanned operation. Secondly, high-pressure environments have higher requirements for the stiffness and strength of the filter plates. Therefore, in terms of the equipment weight, traditional plate and frame filter presses require greater investment.

[0011] To solve these problems, the bag type filter press designed in the present application has a different working principle from traditional plate and frame filter presses. It does not need to rely on reverse pressure for sealing. In this way, the bag type filter press can not only maintain good sealing performance in a high-pressure environment, but also avoid the phenomenon of spraying materials, thereby improving the filtrate separation efficiency. In addition, the bag type filter press has relatively low requirements for stiffness and strength, reducing the cost and equipment weight, making it more suitable for various scenarios.

[0012] In summary, compared with traditional plate and frame filter presses, the bag type filter press has obvious advantages in high-pressure environments. It can not only solve the problems of sealing and spraying materials, improve the filtrate separation effect, but also reduce the cost and equipment weight, and achieve unmanned operation.

[0013] In a possible implementation manner, the filter bag body is trapezoidal;

[0014] Along the height direction of the filter bag body, the length from the top end of the filter bag body to the bottom end of the filter bag body gradually increases.

[0015] In a possible implementation, the filter bag body further includes a first side filtering surface and two second side filtering surfaces arranged oppositely. The first side filtering surface and the second side filtering surfaces are located between the two main filtering surfaces and are connected to the main filtering surfaces to enclose the filter cavity.

[0016] The opening is provided on at least one of the first side filtering surface and the second side filtering surfaces.

[0017] In a possible implementation, positioning members are respectively provided on both sides of the bottom end of the filter bag body, and positioning holes are provided on the positioning members.

[0018] In a possible implementation, a hanging device is further included, and the hanging device is connected to the top end of the filter bag body.

[0019] In a possible implementation, the hanging device includes a horizontal shaft and a cross beam connected to the horizontal shaft, and the filter bag body is connected to the hanging device through the cross beam.

[0020] In a possible implementation, the hanging device further includes a sensor and rollers. The sensor is arranged between the horizontal shaft and the cross beam, and the rollers are arranged at both ends of the horizontal shaft.

[0021] In a possible implementation, a plurality of protrusions are provided on the surface of the cross beam facing the horizontal shaft, and the top end of the filter bag body is hung on the plurality of protrusions so that the filter bag body is connected to the cross beam.

[0022] In a possible implementation, at least one hanging member is provided at the top end of the filter bag body, a plurality of hanging holes are provided on the hanging member, and the hanging member is connected to the cross beam by sleeving the protrusions through the hanging holes.

[0023] The embodiment of the present application further provides a filter press, including:

[0024] A frame and the above-mentioned hanging filter bag. The hanging filter bag is movably arranged on the frame. A guide rail is provided on the frame, and the guide rail is used for the rollers on the hanging filter bag to roll so that the hanging filter bag moves on the frame.

[0025] In addition to the technical problems solved by the present application, the technical features constituting the technical solution, and the beneficial effects brought by these technical features of the technical solution described above, other technical problems that can be solved by a hanging filter bag and a filter press provided by the present application, other technical features included in the technical solution, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments of the present application or the prior art. Obviously, the accompanying drawings in the following description are only a part of the embodiments of the present application. These drawings and the text description are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Structural schematic diagram of the hanging filter bag provided by the embodiment of the present application;

[0028] Figure 2 Structural schematic diagram of the hanging filter bag provided by the embodiment of the present application;

[0029] Figure 3 Structural schematic diagram of the filter bag body of the hanging filter bag provided by the embodiment of the present application;

[0030] Figure 4 Structural schematic diagram of the hanging device of the hanging filter bag provided by the embodiment of the present application;

[0031] Figure 5 Structural schematic diagram of the filter press provided by the embodiment of the present application.

[0032] Explanation of reference numerals:

[0033] 100 - frame; 101 - guide rail;

[0034] 202 - filter bag; 2021 - filter bag body; 2022 - main filtration surface; 2023 - filter cavity; 2024 - opening; 2025 - open end; 2026 - first side filtration surface; 2027 - second side filtration surface; 2028 - positioning member; 2029 - positioning hole;

[0035] 203 - hanging device; 2031 - horizontal shaft; 2032 - cross beam; 2033 - sensor; 2034 - roller; 2035 - protrusion; 2036 - hanging member; 2037 - hanging hole. Detailed implementation manners

[0036] Traditional filter press equipment often has a filter cloth arranged between two adjacent filter plates to form a filter cavity. During the filtration process, the liquid to be filtered needs to overcome the resistance of the filter cake and enter the filter cavity between two adjacent filter plates by means of an external pressure. And as the thickness of the filter cake increases, the resistance for the liquid to be filtered to penetrate the filter cake increases accordingly, which will lead to a decrease in the filtration efficiency.

[0037] In view of this, the embodiment of the present application provides two opposite main filtering surfaces, forming a filtering cavity with an open bottom, and the filtering cavity is used to hold the liquid to be filtered. The open bottom not only facilitates the easy removal of the filter cake after the pressure filtration is completed, but also can maintain a closed state during feeding or pressure filtration to prevent material leakage. The operation process is simplified, the maintenance cost is reduced, and the pressure filtration efficiency is improved.

[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0039] Figure 1 It is a schematic structural diagram of a hanging filter bag provided by an embodiment of the present application. Figure 2 It is a schematic structural diagram of a hanging filter bag provided by an embodiment of the present application. Figure 3 It is a schematic structural diagram of the filter bag body of the hanging filter bag provided by an embodiment of the present application. Figure 4 It is a schematic structural diagram of the hanging device of the hanging filter bag provided by an embodiment of the present application. Figure 5 It is a schematic structural diagram of a plate filter provided by an embodiment of the present application.

[0040] The embodiment of the present application provides a plate filter, including a frame 100 and a filter bag 202 arranged on the frame 100. Exemplarily, as Figure 5 shown, the filter bag 202 is movably arranged on the frame 100, and a guide rail 101 is provided on the frame 100, and the guide rail 101 is used for the roller 2034 on the filter bag 202 to roll, so that the filter bag 202 moves on the frame 100.

[0041] The filter bag 202 provided by the embodiment of the present application includes a filter bag main body 2021. The filter bag main body 2021 includes two opposite main filtering surfaces 2022. The two ends of the two main filtering surfaces 2022 are connected to form a filtering cavity 2023. The filtering cavity 2023 is used to accommodate the object to be filtered. An opening 2024 communicating with the filtering cavity 2023 is provided on the filter bag main body 2021. The opening 2024 is used to allow at least the object to be filtered to enter the filtering cavity 2023. The bottom end of the filter bag main body 2021 is an open end 2025. The open end 2025 is used to be in a closed state when the filter bag main body 2021 is in the feeding or pressure filtration process, and is used to be in an open state after the pressure filtration of the filter bag main body 2021 is completed, so that the filter cake formed in the filtering cavity 2023 after the pressure filtration is discharged from the open end 2025.

[0042] In a possible implementation manner, as Figure 2 and Figure 3As shown, the filter bag body 2021 includes two main filter surfaces 2022 arranged oppositely. The two ends of the two main filter surfaces 2022 arranged oppositely are connected to form a filter cavity 2023, and the filter cavity 2023 is used to accommodate the material to be filtered. An opening 2024 communicating with the filter cavity 2023 may be provided on the filter bag body 2021, and the opening 2024 is used to ensure the smooth entry of the material to be filtered into the filter cavity 2023 for subsequent pressure filtration. In the embodiment of the present application, two openings 2024 are symmetrically arranged, but not limited to two, and are determined according to industrial conditions such as the feeding speed and the filter bag capacity.

[0043] In another possible implementation, the opening 2024 can also be used to assist in discharging materials. For example, the opening 2024 can be connected to an air supply port (not shown in the figure). After the pressure filtration is completed, air can be injected into the filter cake in the filter cavity 2023 through the opening 2024, and the filter cake can be separated from the filter cavity 2023 under the action of air pressure.

[0044] The bottom end of the filter bag body 2021 is provided with an open end 2025, and the open end 2025 can meet the requirements of different stages of the filter bag body 2021 during the pressure filtration process. For example, when the material to be filtered enters the filter cavity 2023 or during pressure filtration, the open end 2025 can be in a closed state to effectively prevent the leakage of the material to be filtered. After the pressure filtration is completed, the open end 2025 can also be in an open state to facilitate the rapid discharge of the filter cake formed in the filter cavity 2023.

[0045] It can be understood that the material to be filtered is a mixture of solid and liquid. It should be noted that the filter bag body 2021 can be made of polymer materials, such as polyester or polypropylene or nylon with a mesh size of 400-600.

[0046] In some embodiments of the present application, the filter bag body 2021 is trapezoidal, and along the height direction of the filter bag body 2021, the length from the top end of the filter bag body 2021 to the bottom end of the filter bag body 2021 gradually increases.

[0047] Please continue to refer to Figure 2 and Figure 3 , along the height direction of the filter bag body 2021, the length gradually increases from the top end to the bottom end, and the filter bag body 2021 is in a trapezoidal state. It should be noted that the filter bag body 2021 can be an isosceles trapezoid or a right trapezoid. It can be understood that the filter bag body is trapezoidal, and the bottom width dimension of the filter bag body is larger than the top width dimension of the filter bag body 2021. The trapezoidal filter bag body allows more material to be filtered to enter the filter cavity 2023, thereby improving the pressure filtration efficiency. Moreover, the filter cake formed after the pressure filtration can naturally slide down to the bottom under the action of gravity, which helps the filter cake to smoothly separate from the filter cavity 2023, reduces mechanical or manual operations, and greatly improves the discharging efficiency.

[0048] In some embodiments of the present application, the filter bag body 2021 also includes a first side filter surface 2026 and two oppositely arranged second side filter surfaces 2027. The first side filter surface 2026 and the second side filter surface 2027 are located between the two main filter surfaces 2022, and are connected to the main filter surfaces 2022 to form a filter cavity 2023. The opening 2024 is arranged on at least one of the first side filter surface 2026 and the second side filter surface 2027.

[0049] like Figure 3 As shown, the filter bag body 2021 may also include a first side filter surface 2026 disposed at the top, and two second side filter surfaces 2027 disposed opposite to each other, and the first side filter surface 2026 and the two second side filter surfaces 2027 are disposed between the two main filter surfaces 2022. The filter cavity 2023 is formed by the first side filter surface 2026, the two second side filter surfaces 2027 and the two main filter surfaces 2022. It is understood that the first side filter surface 2026 and the second side filter surface 2027 can increase the volume of the filter cavity 2023, so that more to-be-filtered materials can be processed per unit time. In addition, the filter bag body 2021 can withstand greater pressure and impact force during the filter pressing process, thereby improving the stability and durability of the filter bag body 2021.

[0050] In some embodiments of the present application, positioning members 2028 are respectively provided on both sides of the bottom end of the filter bag body 2021, and positioning holes 2029 are provided on the positioning members 2028. Figure 1 and Figure 2 As shown, the filter bag body 2021 is provided with positioning members 2028 at both ends of the side close to the opening 2025. In the embodiment of the present application, each main filter surface 2022 is provided with positioning members 2028 at both ends, that is, the number of positioning members 2028 is four. It should be noted that the number of positioning members 2028 can be four, but is not limited to four, and can be designed according to actual needs. And each positioning member 2028 is provided with a positioning hole 2029, and the positioning member 2028 and the positioning hole 2029 are used to fix the filter bag body 2021 in a specific position.

[0051] In a possible implementation, the positioning member 2028 can be used to connect with the sealing device at the bottom of the filter bag body 2021 (not shown in the figure). The filter bag body 2021 is precisely aligned with the sealing device through the positioning member 2028 to ensure that the connection between the filter bag body 2021 and the sealing device is tight and stable. This helps prevent the filter bag body 2021 from shifting or loosening during the filter pressing process, thereby ensuring the filtering effect and the service life of the filter bag body 2021. In addition, after the filter pressing is completed, when the sealing device opens the bottom of the filter bag body 2021, the opening 2025 of the filter bag body 2021 can be opened through the positioning member 2028, which helps the filter cake fall from the filter cavity 2023.

[0052] In some embodiments of the present application, it further includes a suspension device 203, and the suspension device 203 is connected to the top end of the filter bag body 2021. Exemplarily, as Figure 1 shown, the filter bag 202 further includes a suspension device 203, and the filter bag body 2021 is suspended by the suspension device 203 to ensure that the filter bag body 2021 can maintain a stable suspension posture during the pressure filtration process, preventing shaking or deviation from affecting the pressure filtration effect. In addition, using the suspension device 203 to keep the filter bag body 2021 in a suspended state can reduce the friction and pulling force suffered by the filter bag body 2021 during the pressure filtration process, and can also ensure that the filter bag body 2021 is evenly stressed during the pressure filtration process, reducing the possibility of filter bag damage caused by uneven stress.

[0053] In some embodiments of the present application, the suspension device 203 includes a horizontal shaft 2031 and a cross beam 2032 connected to the horizontal shaft 2031, and the filter bag body 2021 is connected to the suspension device 203 through the cross beam 2032. As Figure 4 shown, the suspension device 203 includes a horizontal shaft 2031 and a cross beam 2032, and the horizontal shaft 2031 is connected to the cross beam 2032. The horizontal shaft 2031 can be placed on the pressure filter, and the suspension device 203 is connected to the filter bag body 2021 through the cross beam 2032 so that the filter bag body 2021 is in a suspended posture and is hung on the frame 100 of the pressure filter for subsequent pressure filtration process. It should be noted that the length dimension of the horizontal shaft 2031 can be slightly larger than the length dimension of the cross beam 2032.

[0054] In some embodiments of the present application, the suspension device 203 further includes a sensor 2033 and rollers 2034. The sensor 2033 is arranged between the horizontal shaft 2031 and the cross beam 2032, and the rollers 2034 are arranged at both ends of the horizontal shaft 2031. In the embodiments of the present application, as Figure 4 shown, there are two sensors 2033, and each sensor 2033 is arranged between the horizontal shaft 2031 and the cross beam 2032 and near both ends. The sensor 2033 can be a kind of gravity sensor 2033, which is used to collect the weight information of the material to be filtered or the filter cake after pressure filtration in the filter cavity 2023 of the filter bag body 2021, so as to analyze the operation condition of the pressure filter and provide data support for subsequent maintenance, upkeep and performance optimization. In addition, when the sensor 2033 detects an abnormal situation, it can send out a warning signal to remind the operator to take measures in time to avoid equipment damage or fault expansion.

[0055] Please continue to refer to Figure 1 and Figure 4, the suspension device 203 further includes rollers 2034 which are arranged at both ends of the cross shaft 2031 and are used to reduce the friction between the suspension device 203 and the frame 100 of the filter press. By means of the rollers 2034, the filter bag body can move more smoothly on the frame 100 of the filter press.

[0056] In some embodiments of the present application, a plurality of protrusions 2035 are provided on the surface of the cross beam 2032 facing the cross shaft 2031, and the top end of the filter bag body 2021 is suspended on the plurality of protrusions 2035 so that the filter bag body 2021 is connected to the cross beam 2032. As Figure 4 shown, in the embodiment of the present application, the cross section of the cross beam 2032 is rectangular, and a plurality of protrusions 2035 are provided on the surface of the cross shaft 2031 facing the cross beam 2032. The protrusions 2035 are used to provide suspension points for the filter bag body 2021, so that the filter bag body 2021 can maintain a stable suspension posture during the pressure filtration process, avoiding deviation, thereby ensuring the smooth progress of the pressure filtration process and the consistency of the filtration effect.

[0057] As Figure 4 shown, in the embodiment of the present application, the number of protrusions 2035 on the cross beam 2032 is nine, but it is not limited to nine and can be evenly opened according to the size of the filter bag. It can be understood that the protrusions 2035 facilitate the installation and disassembly of the filter bag body 2021 to be simpler and faster. The operator can complete the installation by aligning and fixing the top end of the filter bag body 2021 with the protrusions 2035 on the cross beam 2032. Removing the top end of the filter bag body 2021 from the protrusions 2035 on the cross beam 2032 can separate the filter bag body 2021 from the suspension device 203. It should be noted that the cross section of the cross beam 2032 can be rectangular but is not limited to rectangular, and can also be circular, etc.

[0058] In some embodiments of the present application, at least one suspension member 2036 is provided at the top end of the filter bag body 2021, and a plurality of suspension holes 2037 are provided on the suspension member 2036. The suspension member 2036 is connected to the cross beam 2032 by sleeving the protrusions 2035 through the suspension holes 2037. As Figure 2 shown, in the embodiment of the present application, two suspension members 2036 are provided at the top end of the filter bag body 2021, and each suspension member 2036 is connected to the top end of each main filtration surface 2022. Nine suspension holes 2037 are provided on each suspension member 2036. It can be understood that the number of suspension holes 2037 on the suspension member 2036 is the same as the number of protrusions 2035 on the cross beam 2032, and the positions of the suspension holes 2037 correspond to the positions of the protrusions 2035. By sleeving the suspension member 2036 on the protrusions 2035 through the suspension holes 2037, the connection between the filter bag body 2021 and the suspension device 203 is realized.

[0059] Among them, terms such as "upper" and "lower" are used to describe the relative positional relationship of each structure in the drawings, only for the sake of clarity in narration, rather than to limit the scope of implementation of this application. The change or adjustment of their relative relationship, without substantial change in technical content, should also be regarded as the scope of implementation of this application.

[0060] It should be noted that: in this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0061] In addition, in this application, unless otherwise clearly specified and limited, terms such as "install", "connect", "join", "fix" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. 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.

[0062] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0063] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of this application, rather than to limit it; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A hanging filter bag, characterized in that: include: A filter bag body, the filter bag body comprising two main filter surfaces arranged opposite to each other, the two ends of the two main filter surfaces being connected to form a filter cavity, the filter cavity being used to accommodate an object to be filtered, the filter bag body being provided with an opening connected to the filter cavity, the opening being used to allow at least the object to be filtered to enter the filter cavity; The bottom end of the filter bag body is open, and the opening is used to be closed when the filter bag body is in feeding or filtering, and to be open after the filter bag body has completed filtering, so that the filter cake formed by filtering in the filter cavity can be unloaded from the opening.

2. The hanging filter bag according to claim 1, characterized in that: The filter bag body is in a trapezoidal shape; Along the height direction of the filter bag body, the length from the top end of the filter bag body to the bottom end of the filter bag body gradually increases.

3. The hanging filter bag according to any one of claims 1-2, characterized in that: The filter bag body further comprises a first side filter surface and two second side filter surfaces arranged opposite to each other, wherein the first side filter surface and the second side filter surface are located between the two main filter surfaces and are connected with the main filter surfaces to form the filter cavity; The opening is disposed on at least one of the first side filter surface and the second side filter surface.

4. The hanging filter bag according to claim 3, characterized in that: Positioning pieces are respectively arranged on both sides of the bottom end of the filter bag body, and positioning holes are arranged on the positioning pieces.

5. The hanging filter bag according to any one of claims 1-2, characterized in that: It also includes a hanging device, which is connected to the top end of the filter bag body.

6. The hanging filter bag according to claim 5, characterized in that: The suspension device comprises a transverse axis and a crossbeam connected to the transverse axis, and the filter bag body is connected to the suspension device via the crossbeam.

7. The hanging filter bag according to claim 6, characterized in that: The suspension device further comprises a sensor and a roller, wherein the sensor is arranged between the transverse axis and the transverse beam, and the roller is arranged at two ends of the transverse axis.

8. The hanging filter bag according to claim 7, characterized in that: A plurality of protrusions are arranged on a surface of the cross beam facing the horizontal axis, and the top end of the filter bag body is suspended on the plurality of protrusions so that the filter bag body is connected to the cross beam.

9. The hanging filter bag according to claim 8, characterized in that: At least one hanging piece is arranged at the top of the filter bag body, and a plurality of hanging holes are arranged on the hanging piece. The hanging piece and the crossbeam are connected by being sleeved on the protrusion through the hanging holes.

10. A filter press, characterized in that: include: A frame, and a hanging filter bag as described in any one of claims 1 to 9, wherein the hanging filter bag is movably arranged on the frame, and a guide rail is provided on the frame, and the guide rail is used for the rollers on the hanging filter bag to roll so that the hanging filter bag can move on the frame.

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