A bag filter for refining monosodium salts

Abstract

This disclosure relates to the technical field of bag filters. One embodiment of this disclosure provides a bag filter for monosodium salt purification, comprising: a housing and several supporting legs. The housing is disposed on the supporting legs, a connecting and fixing assembly is disposed between the housing and the supporting legs, an outer frame is fixed to the outside of the housing, and a filter bag mounting assembly is disposed on the housing and the outer frame. The filter bag mounting assembly includes an inner support layer disposed around the inner surface of the housing. A top cover is inserted into the top of the housing, and an inner shell is disposed at the bottom of the top cover. A connection port is opened at the bottom of the inner shell, and a mating sleeve is screwed into the connection port. A filter bag body is disposed at the bottom of the mating sleeve. This technical solution solves the technical problem of inconvenient filter bag disassembly and replacement commonly found in existing bag filters for monosodium salt purification.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of bag filters, and more specifically, to a bag filter for the purification of monosodium salts. Background Technology

[0002] In the production of monosodium salts (such as sodium chloride, sodium sulfate, and other monosodium salt products), refining and purification are core processes to ensure product purity and quality. Filtration is necessary to remove residual impurities, particles, and flocculent matter from the raw materials, ensuring that the purity of the crystallized monosodium salt meets industrial or food-grade standards. Bag filters used in monosodium salt refining are specialized filtration equipment, and the ease of filter bag replacement directly determines filtration efficiency and production continuity. As monosodium salt production moves towards large-scale, high-purity production, the shortcomings of traditional bag filters are becoming increasingly apparent: existing bag filters used for monosodium salt refining generally suffer from inconvenient filter bag disassembly and replacement. The replacement process requires disassembling multiple fixed components and interrupting the filtration process, not only extending equipment downtime but also increasing the workload of operators, making it difficult to meet the demands of efficient and continuous refining.

[0003] Traditional bag filters typically employ a flange-sealed, bolt-fixed filter bag installation structure, with the filter bag supported and fixed inside the filter cartridge by a metal frame during filtration. When the filter bag needs replacement due to excessive impurities, operators must first close the inlet valve, drain the liquid from the filter cartridge, then disassemble the flange bolts one by one, remove the old filter bag frame, replace it with a new filter bag, and reassemble and fix it. In the monosodium salt refining process, the filter bag replacement frequency is high, with each replacement taking more than 30 minutes, leading to frequent interruptions in the filtration process. Furthermore, the monosodium salt solution is corrosive, and residual solution during disassembly poses a safety hazard to operators. Repeated bolt disassembly can also cause stripping and poor sealing, potentially leading to leakage during subsequent filtration and affecting product purity.

[0004] Therefore, the development of bag filters for monosodium salt refining with easy disassembly and quick filter bag replacement has become an urgent need to improve the efficiency and production continuity of monosodium salt refining. Utility Model Content

[0005] To overcome the above-mentioned defects, embodiments of this disclosure provide a bag filter for the purification of monosodium salts, which solves the technical problem that existing bag filters used for the purification of monosodium salts are generally inconvenient to disassemble and replace.

[0006] According to one aspect, at least one embodiment of this disclosure provides a bag filter for the purification of monosodium salts, comprising: The outer casing and several supporting legs, the outer casing being disposed on the supporting legs; A connecting and fixing assembly is disposed between the housing and the supporting leg; An outer frame and a filter bag mounting assembly, wherein the outer frame is fixed to the outside of the housing, and the filter bag mounting assembly is disposed on the housing and the outer frame; The filter bag mounting assembly includes an inner support layer, which is arranged around the inner surface of the outer shell. A top cover is inserted into the top of the outer shell, and an inner shell is provided at the bottom of the top cover. A connection port is opened at the bottom of the inner shell, and a mating sleeve is connected to the connection port by screwing. The filter bag body is provided at the bottom of the mating sleeve.

[0007] As a further technical solution, the top cover surface has an inlet, the top cover surface has a slot, the slot is connected to the inlet, and the lifting frame is vertically slidably connected inside the outer frame.

[0008] As a further technical solution, a drive stud is vertically rotatably connected inside the outer frame. The drive stud is connected to the lifting frame by a threaded connection. A docking pipe is fixedly connected to one end of the lifting frame. The docking pipe is vertically and sealedly inserted into the slot.

[0009] According to another aspect, in at least one embodiment of the present invention, the connecting and fixing assembly includes a sleeve, which is fixed between the upper ends of a plurality of the supporting legs, and a boss is provided around the outer surface of the outer shell, which is fitted into the sleeve through the boss.

[0010] As a further technical solution, threaded grooves are provided between the upper end of the support leg and the sleeve, and fastening studs are connected to the threaded grooves by threaded screws, with one end of the fastening stud inserted into the surface of the boss.

[0011] As a further technical solution, a mesh plate is provided inside the outer shell, and the mesh plate is supported at the bottom of the filter bag body.

[0012] As a further technical solution, a number of inner ring protective frames are provided around the inner wall of the outer shell, and the inner ring protective frames all surround the outside of the filter bag body.

[0013] As a further technical solution, both the lifting frame and the outer frame have rectangular cross-sections.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the filter bag installation assembly solves the problems of cumbersome filter bag replacement and easy leakage in traditional filters through convenient disassembly and sealing filtration design. The threaded connection between the docking sleeve and the connector allows for quick disassembly and replacement of the filter bag without disassembling complex structures. The drive stud moves the lifting frame to adjust the position of the docking pipe, and the sealed insertion slot ensures no solution leakage, preventing impurity contamination or product loss. The inner support layer, mesh plate, and inner ring protective frame work together to support the filter bag, preventing deformation and damage, and ensuring filtration area and efficiency. This structure significantly shortens filter bag replacement time, reduces equipment downtime, and, through multiple sealing and support designs, ensures the purity and stability of single-sodium salt purification filtration, meeting the continuous and precise requirements of large-scale production. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle; Figure 5 Appendix to this disclosure Figure 3 Enlarged view of part B in the middle section; In the diagram: 1. Outer shell; 2. Support leg; 3. Outer frame; 4. Filter bag mounting assembly; 4-1. Inner support layer; 4-2. Top cover; 4-3. Inner shell; 4-4. Connection port; 4-5. Docking sleeve; 4-6. Filter bag body; 4-7. Inlet; 4-8. Slot; 4-9. Lifting frame; 4-10. Drive stud; 4-11. Docking pipe; 5. Connection and fixing assembly; 5-1. Sleeve; 5-2. Boss; 5-3. Threaded groove; 5-4. Fastening stud; 6. Mesh plate; 7. Inner ring protection frame. Detailed Implementation

[0017] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0020] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-5 As shown, a bag filter for monosodium salt refining is illustrated in one embodiment of this disclosure, comprising: The outer shell 1 and several supporting legs 2 are provided on the supporting legs 2; A connecting and fixing component 5 is disposed between the outer shell 1 and the supporting leg 2; The outer frame 3 and the filter bag mounting assembly 4 are provided on the outer shell 1 and the outer frame 3, respectively. The filter bag mounting assembly 4 includes an inner support layer 4-1, which is arranged around the inner surface of the outer shell 1. A top cover 4-2 is inserted into the top of the outer shell 1, and an inner shell 4-3 is provided at the bottom of the top cover 4-2. A connection port 4-4 is opened at the bottom of the inner shell 4-3. A mating sleeve 4-5 is screwed into the connection port 4-4. A filter bag body 4-6 is provided at the bottom of the mating sleeve 4-5. An inlet 4-7 and a slot 4-8 are opened on the surface of the top cover 4-2. The slot 4-8 communicates with the inlet 4-7. A lifting frame 4-9 is vertically slidably mounted inside the outer frame 3. A drive stud 4-10 is vertically rotatably connected inside the outer frame 3. The drive stud 4-10 is threadedly connected to the lifting frame 4-9. A docking pipe 4-11 is fixedly connected to one end of the lifting frame 4-9. The docking pipe 4-11 is vertically and sealedly inserted into the slot 4-8.

[0024] In some examples, to achieve rapid filter bag replacement and efficient filtration of monosodium salt solutions, and to avoid the cumbersome disassembly and poor sealing problems caused by leakage when replacing filter bags in traditional filters, a filter bag installation assembly 4 is designed. This assembly includes an inner support layer 4-1 around the inner surface of the outer shell 1 to provide support for the filter bag body 4-6, preventing the filter bag from deforming under the impact of high-pressure solution and ensuring stable filtration area. The top cover 4-2 inserted at the top of the outer shell 1 is threadedly connected to the connecting port 4-4 at the bottom of the inner shell 4-3 and the docking sleeve 4-5, fixing the filter bag body 4-6 under the inner shell 4-3. The threaded connection facilitates quick disassembly of the docking sleeve 4-5 to replace the filter bag, while ensuring a tight seal between the filter bag and the inner shell 4-3 to prevent solution leakage from gaps.

[0025] The vertically rotating drive stud 4-10 inside the outer frame 3 is threadedly engaged with the lifting frame 4-9 to form a lifting drive structure. When the drive stud 4-10 is rotated, the lifting frame 4-9 can be driven to slide vertically along the outer frame 3, thereby adjusting the position of the docking pipe 4-11 fixed at one end.

[0026] When filtration is required, the drive stud 4-10 drives the lifting frame 4-9 to descend, so that the docking pipe 4-11 is vertically and sealed into the slot 4-8 on the surface of the top cover 4-2, and the slot 4-8 is connected to the inlet 4-7 on the surface of the top cover 4-2. The monosodium salt solution can enter the inner shell 4-3 through the docking pipe 4-11 and the inlet 4-7, and then flow through the filter bag body 4-6 to achieve impurity filtration. The filtered solution is discharged from the bottom of the outer shell 1.

[0027] When replacing the filter bag, rotate the drive stud 4-10 in the opposite direction to raise the lifting frame 4-9, disengage the connecting pipe 4-11 from the slot 4-8, and then pull up the top cover 4-2 to remove the filter bag. The entire process does not require disassembling a large number of parts, greatly shortening maintenance time.

[0028] The sealed insertion design of the connecting pipe 4-11 and slot 4-8 ensures no leakage during solution delivery and improves filtration sealing. The self-locking characteristic of the drive stud 4-10 allows the lifting frame 4-9 to stay at any height, facilitating precise alignment of the connecting pipe 4-11. The structural design of the inner shell 4-3 ensures that the solution is evenly distributed on the surface of the filter bag, avoiding excessive local filtration load that could lead to a decrease in filtration efficiency.

[0029] During operation, the drive stud 4-10 controls the sealing connection of the connecting pipe 4-11, and the solution is filtered through the filter bag. For maintenance, the pipe is raised and lowered, and the top cover 4-2 is removed to replace the filter bag. Convenient disassembly and assembly improves maintenance efficiency, sealed filtration ensures product purity, and the coordinated operation of all components achieves efficient purification of monosodium salt, meeting production requirements.

[0030] like Figures 1-5 As shown in the figure, the connecting and fixing assembly 5 in this embodiment includes a sleeve 5-1, which is fixed between the upper ends of several support legs 2. A boss 5-2 is provided around the outer surface of the outer shell 1. The outer shell 1 is fitted into the sleeve 5-1 through the boss 5-2. A threaded groove 5-3 is provided between the upper end of the support leg 2 and the sleeve 5-1. A fastening stud 5-4 is screwed into the threaded groove 5-3. One end of the fastening stud 5-4 is inserted into the surface of the boss 5-2.

[0031] In some examples, in order to achieve a stable connection between the housing 1 and the support leg 2 and to avoid tilting and shaking of the filter due to vibration and center of gravity shift during the delivery of sodium salt solution, a connection and fixing assembly 5 is designed. This assembly includes several sleeves 5-1 fixed between the upper ends of the support legs 2 to provide annular support for the housing 1. The bosses 5-2 around the outer surface of the housing 1 are fitted into the sleeves 5-1 to form a nested structure, which restricts the horizontal displacement of the housing 1 and prevents the housing 1 from shifting laterally due to solution impact or equipment vibration.

[0032] A fastening stud 5-4 is screwed into the threaded groove 5-3 between the upper end of the support leg 2 and the sleeve 5-1, and one end of the fastening stud 5-4 is inserted into the surface of the boss 5-2. The sleeve 5-1, support leg 2 and boss 5-2 are tightly fixed by the threaded locking, forming a multi-fixing structure to enhance the overall support stability.

[0033] The annular structure of the sleeve 5-1 ensures that the supporting force is evenly distributed around the outer shell 1, preventing excessive local stress that could cause deformation of the outer shell 1. The number and distribution of the support legs 2 are optimized to ensure the stability of the filter's center of gravity and to withstand the overall weight of the outer shell 1, filter bag, and solution. The detachable design of the fastening studs 5-4 facilitates equipment disassembly and maintenance while ensuring connection strength and preventing loosening during long-term use. In addition, the nesting fit between the boss 5-2 and the sleeve 5-1 facilitates quick positioning and installation of the outer shell 1, reducing equipment assembly time and improving installation efficiency.

[0034] During operation, the support leg 2, through the nesting of the sleeve 5-1 and the boss 5-2, and the locking of the fastening stud 5-4, firmly supports the outer shell 1 in the designated position, ensuring that the equipment does not shake during filtration. For maintenance, the outer shell 1 and support leg 2 can be separated by disassembling the fastening stud 5-4, facilitating equipment transport or internal component repair. Multiple fixing mechanisms ensure stable support, and convenient disassembly and assembly improve maintainability. The coordinated operation of all components ensures stable equipment operation, meeting the requirements of single-sodium salt refining filtration scenarios.

[0035] For example, such as Figure 3 As shown, a mesh plate 6 is provided inside the outer shell 1, and the mesh plate 6 is supported at the bottom of the filter bag body 4-6.

[0036] In some examples, the mesh plate 6 inside the outer shell 1, which supports the bottom of the filter bag body 4-6, provides bottom load-bearing support for the filter bag, further enhancing its stability. During the filtration of monosodium salt solutions, the filter bag body 4-6 gradually increases in weight due to the trapping of impurities, and the impact of the solution may cause the bottom of the filter bag to sag. The mesh plate 6 can support the weight of the filter bag through its evenly distributed mesh structure, preventing the filter bag from being excessively stretched, deformed, or damaged, and ensuring that the filtration area remains intact.

[0037] For example, such as Figure 3 As shown, a plurality of inner ring protective frames 7 are provided around the inner wall of the outer shell 1, and the inner ring protective frames 7 all surround the outside of the filter bag body 4-6.

[0038] In some examples, several inner ring protective frames 7, surrounding the filter bag body 4-6 from the inner wall of the outer casing 1, provide lateral protection from the outside of the filter bag. During filtration, the high-pressure monosodium salt solution may cause the filter bag to expand outwards. If there are protrusions or impurities on the inner wall of the outer casing 1, it can easily cause localized wear of the filter bag. The inner ring protective frames 7 isolate the filter bag from the inner wall of the outer casing 1 through a ring structure, limiting excessive expansion of the filter bag and preventing the filter bag from directly contacting the inner wall of the outer casing 1, thus reducing the risk of wear.

[0039] For example, such as Figure 3 As shown, the lifting frame 4-9 and the outer frame 3 both have rectangular cross-sections.

[0040] In some examples, both the lifting frame 4-9 and the outer frame 3 have rectangular cross-sections, which improves the stability and accuracy of the sliding of the lifting frame 4-9. Compared to a circular cross-section, the rectangular structure limits the rotational offset of the lifting frame 4-9 during the sliding process, ensuring that the lifting frame 4-9 always moves smoothly along the vertical direction of the outer frame 3. This avoids misalignment between the docking pipe 4-11 and the slot 4-8 of the top cover 4-2 due to the rotation of the lifting frame 4-9, which would affect the sealing effect.

[0041] In practical use: The outer shell 1 is fitted into the sleeve 5-1 at the upper end of the support leg 2 via the boss 5-2 on its outer surface. The fastening stud 5-4 in the threaded groove 5-3 of the sleeve 5-1 is then tightened onto the boss 5-2, completing the secure connection between the outer shell 1 and the support leg 2. The filter bag body 4-6 is screwed onto the connecting port 4-4 at the bottom of the inner shell 4-3 via the threaded fitting 4-5. The top cover 4-2 is then inserted into the top of the outer shell 1. The inner shell 4-3 and the filter bag body 4-6 then enter the outer shell 1. The inner ring protective frame 7 of the inner wall of the outer shell 1 surrounds the outer side of the filter bag body 4-6, and the bottom mesh plate 6 supports the filter bag. Rotating the drive stud 4-10 inside the outer frame 3 causes the lifting frame 4-9 to descend vertically, sealing the connecting pipe 4-11 into the slot 4-8 of the top cover 4-2. The monosodium salt solution flows into the inner shell 4-3 through the connecting pipe 4-11 and the inlet 4-7 of the top cover 4-2, and then through the filter bag body 4-6 for filtration. Impurities are trapped, and the filtered solution is discharged from the bottom of the outer shell 1. When the filter bag needs to be replaced, turn the drive stud 4-10 in the reverse direction to raise the lifting frame 4-9, pull out the connecting pipe 4-11, remove the top cover 4-2 upwards, and unscrew the connecting sleeve 4-5 to replace the filter bag. The entire process does not require disassembling a large number of parts.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A bag filter for refining monosodium salts, characterized in that, include: The outer shell (1) and a plurality of supporting legs (2), wherein the outer shell (1) is disposed on the supporting legs (2); A connecting and fixing component (5) is disposed between the outer shell (1) and the supporting leg (2); The outer frame (3) and the filter bag mounting assembly (4) are provided on the outer shell (1) and the outer frame (3), respectively. The filter bag mounting assembly (4) includes an inner support layer (4-1), which is disposed around the inner surface of the outer shell (1). A top cover (4-2) is inserted into the top of the outer shell (1), and an inner shell (4-3) is disposed at the bottom of the top cover (4-2). A connection port (4-4) is opened at the bottom of the inner shell (4-3), and a mating sleeve (4-5) is screwed into the connection port (4-4) by means of threads. A filter bag body (4-6) is disposed at the bottom of the mating sleeve (4-5).

2. A bag filter for refining monosodium salts according to claim 1, characterized in that, The top cover (4-2) has an inlet (4-7) on its surface and a slot (4-8) on its surface. The slot (4-8) is connected to the inlet (4-7). The lifting frame (4-9) is vertically slidably connected inside the outer frame (3).

3. A bag filter for refining monosodium salts according to claim 2, characterized in that, The outer frame (3) is vertically rotatably connected to a drive stud (4-10). The drive stud (4-10) is connected to the lifting frame (4-9) by a threaded connection. One end of the lifting frame (4-9) is fixedly connected to a docking pipe (4-11). The docking pipe (4-11) is vertically and sealedly inserted into the slot (4-8).

4. A bag filter for refining monosodium salts according to claim 1, characterized in that, The connecting and fixing assembly (5) includes a sleeve (5-1), which is fixed between the upper ends of several support legs (2). A boss (5-2) is provided around the outer surface of the outer shell (1), and the outer shell (1) is fitted into the sleeve (5-1) through the boss (5-2).

5. A bag filter for refining monosodium salts according to claim 4, characterized in that, The upper end of the support leg (2) and the sleeve (5-1) are both provided with threaded grooves (5-3). A fastening stud (5-4) is connected to the threaded groove (5-3) by screwing. One end of the fastening stud (5-4) is inserted into the surface of the boss (5-2).

6. A bag filter for refining monosodium salts according to claim 1, characterized in that, A mesh plate (6) is provided inside the outer shell (1), and the mesh plate (6) is supported at the bottom of the filter bag body (4-6).

7. A bag filter for refining monosodium salts according to claim 1, characterized in that, The inner wall of the outer shell (1) is provided with several inner ring protective frames (7), all of which surround the outside of the filter bag body (4-6).

8. A bag filter for refining monosodium salts according to claim 2, characterized in that, The lifting frame (4-9) and the outer frame (3) both have rectangular cross-sections.

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