Long-acting sealing cross-flow filtering equipment

Abstract

The utility model discloses long-acting sealing cross-flow filtering equipment which comprises a shell, the shell comprises an upper flange, a barrel and a lower flange which are sequentially connected, the upper flange and the lower flange are respectively communicated with a first external pipeline and a second external pipeline, and a plurality of clear liquid outlets are formed in the shell; the filter assembly is detachably arranged in the shell, the top of the filter assembly is connected with the upper flange, and the bottom of the filter assembly and the lower flange form sealing faces matched with each other. The requirement for the machining size precision of the sealing faces of the equipment is low, the gap between the two sealing faces in matched sealing is not larger than 1 mm, and the gap between the sealing faces of a traditional rubber ring is not larger than 0.5 mm. Compared with a traditional rubber ring, the structure is low in sealing face roughness requirement. And the sealing material can be replaced only by detaching the gland. The sealing filler adopted by the equipment is not easy to age, and the metal filler and the non-metal filler can be suitable for various acid-base media and are resistant to high temperature.

Description

Technical Field

[0001] This utility model relates to cross-flow filters, specifically to a long-lasting sealed cross-flow filtration device. Background Technology

[0002] In cross-flow filters with detachable tube bundles, the sealing method between the tube sheet and the flange affects the sealing effect and operating cycle of the equipment. Existing rubber ring sealing structures require high precision in the machining of sealing surface dimensions and surface roughness, making installation difficult. Replacing the sealing ring requires lifting the entire filter element out of the housing, which places high demands on lifting equipment. Rubber seals are prone to aging under high-temperature conditions, losing their sealing performance and affecting the safe operation of the equipment. Frequent maintenance and replacement of seals increase equipment operating costs and on-site installation workload, reducing production efficiency. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this utility model is to provide a long-lasting sealed cross-flow filtration device that is easy to assemble and disassemble. This device has advantages such as a wide range of applicable pressure and temperature, low requirements for processing precision, easy replacement and installation, low frequency of shutdown and maintenance, and long operating cycle.

[0004] The technical solution provided by this utility model is as follows:

[0005] A long-lasting sealed cross-flow filtration device includes a housing, the housing comprising an upper flange, a cylinder and a lower flange connected in sequence, the upper flange and the lower flange being respectively connected to a first external pipe and a second external pipe, and the housing being provided with multiple clear liquid outlets;

[0006] A filter assembly is detachably disposed within the housing. The top of the filter assembly is connected to the upper flange, and the bottom of the filter assembly forms a mutually mating sealing surface with the lower flange.

[0007] During operation, the filter medium enters the filter assembly through the lower flange via the second external pipe. After cross-flow filtration, the clear liquid enters the cylinder from the filter assembly and flows out through the clear liquid outlet. The filtered concentrate enters the first external pipe from the filter assembly and flows out through the first external pipe.

[0008] Furthermore, the filter assembly includes an upper tube sheet, a lower tube sheet, a filter tube, a support plate, and a tie rod. The upper tube sheet and the lower tube sheet are respectively connected to the upper and lower ends of the filter tube. The upper tube sheet is disposed between the upper flange and the connecting flange of the first external pipe. The outer circle of the lower tube sheet and the inner wall of the lower flange form a mutually mating sealing surface.

[0009] Furthermore, the filter assembly also includes a support plate and a pull rod. The pull rod is evenly spaced around the filter tube, and the top of the pull rod is connected to the upper tube plate. The support plate is disposed inside the cylinder, and the support plate is provided with holes that match the filter tube and the pull rod. The filter tube and the pull rod pass through the support plate.

[0010] Furthermore, the gap between the sealing surface formed by the lower tube sheet and the lower flange is no greater than 1 mm.

[0011] Furthermore, the gaps in the sealing surface are filled with sealing filler.

[0012] Furthermore, the lower tube sheet and the lower flange are connected by a clamping device, which includes a gland, a clamping screw, and a washer. The clamping screw connects the gland to the lower tube sheet or the lower flange and squeezes the sealing filler to fill the gap between the lower tube sheet and the lower flange. The washer is fitted onto the clamping screw.

[0013] Furthermore, the upper flange and the upper tube sheet are connected by a gasket and bolts to achieve a seal;

[0014] The upper flange is fixed to the first external pipe, and the lower flange is fixed to the second external pipe by bolts.

[0015] Furthermore, the tie rod is connected to the upper tube sheet by welding or threading;

[0016] The support plate is fixed to the tie rod by welding or by using nuts.

[0017] Furthermore, the sealing packing is used for no less than two turns.

[0018] Furthermore, the filter tube is disposed at the axial center of the housing;

[0019] The number of the clear liquid outlet and the number of the support plate are both two. The two clear liquid outlets are respectively set at the upper end and the lower end of the cylinder. The two support plates are spaced apart in the cylinder. The bottom end of the pull rod is fixed to the support plate.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention provides a long-lasting, sealed cross-flow filtration device. The device has low dimensional accuracy requirements for the sealing surfaces, with the gap between the two mating sealing surfaces not exceeding 1mm, compared to no more than 0.5mm for traditional rubber ring sealing surfaces. This structure has lower surface roughness requirements than traditional rubber ring sealing devices. Installation is simple, and replacement is convenient; the sealing material can be replaced simply by removing the gland. The sealing packing used in this device is not prone to aging, and both metallic and non-metallic packings are suitable for various acid and alkali media and are heat-resistant. Compared to traditional equipment, using this device reduces downtime for maintenance and sealing material replacement, enabling long-term operation and improving production efficiency. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the long-lasting sealed cross-flow filtration device in the embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the pressing device in the long-lasting sealed cross-flow filtration equipment of this utility model embodiment.

[0024] The attached figures are labeled as follows:

[0025] 1-Shell, 11-Cylinder, 12-Upper flange, 13-Lower flange, 2-Filter assembly, 21-Upper tube sheet, 22-Filter tube, 23-Support plate, 24-Tie rod, 25-Lower tube sheet, 3-Sealing packing, 4-Pressure device, 41-Gland cover, 42-Pressure screw, 43-Washer. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] Therefore, the detailed description of the embodiments of this application provided below with reference to the accompanying drawings is intended merely to illustrate selected embodiments of this application and is not intended to limit the scope of protection claimed by this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] It should be understood that in the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0030] See Figure 1 This utility model provides a long-lasting sealed cross-flow filtration device, including a housing 1. The housing 1 includes an upper flange 12, a cylinder 11, and a lower flange 13 connected in sequence. The upper flange 12 and the lower flange 13 are respectively connected to a first external pipe and a second external pipe. The housing 1 is provided with multiple clear liquid outlets. Figure 1 (Not shown in the image).

[0031] Filter assembly 2 is detachably installed inside housing 1. The top of filter assembly 2 is connected to upper flange 12, and the bottom of filter assembly 2 forms a sealing surface with lower flange 13. Filter assembly 2 can be removed from housing 1 for individual replacement.

[0032] During operation, the filter medium enters the filter assembly 2 through the second external pipe via the lower flange 13. After cross-flow filtration, the clear liquid enters the cylinder 11 from the filter assembly 2 and flows out through the clear liquid outlet. The filtered concentrate enters the first external pipe from the filter assembly 2 and flows out through the first external pipe. Optionally, the filter assembly 2 includes an upper tube sheet 21, a lower tube sheet 25, a filter tube 22, a support plate 23, and a tie rod 24. The upper tube sheet 21 and the lower tube sheet 25 are respectively connected to the upper and lower ends of the filter tube 22. The upper tube sheet 21 is disposed between the upper flange 12 and the connecting flange of the first external pipe. The outer circle of the lower tube sheet 25 forms a mutually mating sealing surface with the inner wall of the lower flange 13.

[0033] The filtered liquid obtained by the equipment provided by this utility model must be completely isolated from the concentrated liquid, and the equipment must be able to operate safely for a long period of time. The sealing effect of the lower tube sheet 25 and the inner wall of the lower flange 13 directly affects the separation effect and the operating cycle of the equipment.

[0034] Optionally, the filter assembly 2 also includes a support plate 23 and a pull rod 24. The pull rod 24 is evenly spaced around the filter tube 22. The top of the pull rod 24 is connected to the upper tube plate 21. The support plate 23 is disposed inside the cylinder 11. The support plate 23 is provided with holes that match the filter tube 22 and the pull rod 24. The filter tube 22 and the pull rod 24 pass through the support plate 23.

[0035] Optionally, the gap between the sealing surfaces formed by the lower tube sheet 25 and the lower flange 13 shall not exceed 1 mm.

[0036] Optionally, the gap between the sealing surfaces is filled with sealing filler 3.

[0037] Optionally, the lower tube sheet 25 and the lower flange 13 are connected by a clamping device 4. The clamping device 4 includes a gland 41, a clamping screw 42, and a washer 43. The clamping screw 42 connects the gland 41 to the lower tube sheet 25 or the lower flange 13 and squeezes the sealing filler 3 to fill the gap between the lower tube sheet 25 and the lower flange 13. The washer 43 is fitted onto the clamping screw 42.

[0038] Specifically, the structure of the clamping device 4 is as follows: Figure 2 As shown, the lower tube sheet 25 and the lower flange 13 are connected by a clamping device 4, which includes a gland 41, clamping screws 42, and washers 43. The gland 41 is connected to the lower tube sheet 25 or the lower flange 13 by the clamping screws 42, compressing the sealing packing 3 to fill the gap between the lower tube sheet 25 and the lower flange 13, thus achieving a seal. The gland 41 has the same number of bolt holes as the lower tube sheet 25 or the lower flange 13. The gland 41 seals by compressing the sealing packing 3 through the tightening force of the clamping screws 42. The clamping device 4 can be disassembled when the sealing packing 3 is replaced, allowing the failed sealing packing 3 to be removed and replaced with a new one.

[0039] Optionally, the upper flange 12 and the upper tube sheet 21 are connected by a gasket and bolts to achieve a seal.

[0040] The upper flange 12 is fixed to the first external pipe, and the lower flange 13 is fixed to the second external pipe by bolts.

[0041] Optionally, the tie rod 24 is connected to the upper tube sheet 21 by welding or threading.

[0042] The support plate 23 and the tie rod 24 are fixed by welding or by nuts.

[0043] Optionally, the sealing packing 3 should be used for no less than two turns.

[0044] The sealing packing 3 is made of metal or non-metal braided material. The sealing packing 3 is compressed and deformed by the clamping device 4 to fill the gap between the lower flange 13 and the lower tube sheet 25, forming an effective seal. The sealing packing 3 should be used in at least two turns.

[0045] Optionally, the filter tube 22 is located at the axial center of the housing 1.

[0046] There are two clear liquid outlets and two support plates 23. The two clear liquid outlets are respectively set at the upper and lower ends of the cylinder 11. The two support plates 23 are spaced apart inside the cylinder 11. The bottom end of the pull rod 24 is fixed to the support plate 23.

[0047] This invention provides a long-lasting, sealed cross-flow filtration device. The device has low dimensional accuracy requirements for the sealing surfaces, with the gap between the two mating sealing surfaces not exceeding 1mm, compared to no more than 0.5mm for traditional rubber ring sealing surfaces. This structure has lower surface roughness requirements than traditional rubber ring sealing devices. Installation is simple, and replacement is convenient; the sealing material can be replaced simply by removing the gland. The sealing packing used in this device is not prone to aging, and both metallic and non-metallic packings are suitable for various acid and alkali media and are heat-resistant. Compared to traditional equipment, using this device reduces downtime for maintenance and sealing material replacement, enabling long-term operation and improving production efficiency.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A long-lasting sealed cross-flow filtration device, characterized in that: The device includes a housing, which comprises an upper flange, a cylinder, and a lower flange connected in sequence. The upper flange and the lower flange are respectively connected to a first external pipe and a second external pipe. The housing is provided with multiple clear liquid outlets. A filter assembly is detachably disposed within the housing. The top of the filter assembly is connected to the upper flange, and the bottom of the filter assembly forms a mutually mating sealing surface with the lower flange. During operation, the filter medium enters the filter assembly through the lower flange via the second external pipe. After cross-flow filtration, the clear liquid enters the cylinder from the filter assembly and flows out through the clear liquid outlet. The filtered concentrate enters the first external pipe from the filter assembly and flows out through the first external pipe.

2. The long-lasting sealed cross-flow filtration device according to claim 1, characterized in that: The filter assembly includes an upper tube sheet, a lower tube sheet, a filter tube, a support plate, and a tie rod. The upper tube sheet and the lower tube sheet are respectively connected to the upper and lower ends of the filter tube. The upper tube sheet is disposed between the upper flange and the connecting flange of the first external pipe. The outer circle of the lower tube sheet and the inner wall of the lower flange form a mutually mating sealing surface.

3. The long-lasting sealed cross-flow filtration device according to claim 2, characterized in that: The filter assembly also includes a support plate and pull rods. The pull rods are evenly spaced around the filter tube, and the top of the pull rods is connected to the upper tube plate. The support plate is disposed inside the cylinder, and the support plate is provided with holes that match the filter tube and the pull rods. The filter tube and the pull rods pass through the support plate.

4. The long-lasting sealed cross-flow filtration device according to claim 2, characterized in that: The gap between the sealing surface formed by the lower tube sheet and the lower flange is no greater than 1 mm.

5. The long-lasting sealed cross-flow filtration device according to claim 2, characterized in that: The gaps in the sealing surfaces are filled with sealing filler.

6. The long-lasting sealed cross-flow filtration device according to any one of claims 2-5, characterized in that: The lower tube sheet and the lower flange are connected by a clamping device, which includes a pressure cap, a clamping screw, and a washer. The clamping screw connects the pressure cap to the lower tube sheet or the lower flange and squeezes the sealing filler to fill the gap between the lower tube sheet and the lower flange. The washer is fitted onto the clamping screw.

7. The long-lasting sealed cross-flow filtration device according to claim 6, characterized in that: The upper flange is connected to the upper tube sheet by a sealing gasket and bolts to achieve a seal; The upper flange is fixed to the first external pipe, and the lower flange is fixed to the second external pipe by bolts.

8. The long-lasting sealed cross-flow filtration device according to claim 3, characterized in that... The tie rod is connected to the upper tube sheet by welding or threading; The support plate is fixed to the tie rod by welding or by using nuts.

9. The long-lasting sealed cross-flow filtration device according to claim 5, characterized in that: The sealing packing is used for no less than two turns.

10. The long-lasting sealed cross-flow filtration device according to any one of claims 3-5, characterized in that: The filter tube is disposed at the axis of the housing; The number of the clear liquid outlet and the number of the support plate are both two. The two clear liquid outlets are respectively set at the upper end and the lower end of the cylinder. The two support plates are spaced apart in the cylinder. The bottom end of the pull rod is fixed to the support plate.

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