Vertical double column series crossflow filter

Abstract

The utility model discloses a vertical double row series cross flow filter, including pressure cylinder subassembly, filter core subassembly, filter liquid communication pipe group and blowback communication pipe group, pressure cylinder subassembly includes a plurality of pressure cylinder and flange connector, and pressure cylinder is placed in double row vertical type, and flange connector is in proper order series adjacent two pressure cylinder, filter core subassembly is installed vertically in pressure cylinder inside, and the inside space of pressure cylinder is divided into inner chamber and outer chamber, filter liquid communication pipe group is used for conveying the filter liquid of producing filtration, and blowback communication pipe group is used for input blowback medium, the utility model provides a vertical double row series cross flow filter through the on-off of flange connector and filter liquid communication pipe group can realize the use of single pressure cylinder, and also can realize the combined use of multiple pressure cylinder, increased the flexibility of system operation, and the on-off of blowback communication pipe group branch valve realizes when carrying out blowback to individual branch pressure cylinder, and other branch and the normal operation of whole filtration system will not be affected.

Description

Technical Field

[0001] This utility model relates to the field of filtration device technology, specifically to a vertical double-row series cross-flow filter. Background Technology

[0002] Cross-flow filtration technology, with its unique advantage of parallel filtration and cake shearing, has been deeply integrated into the core processes and procedures of solid-liquid separation in multiple industries, such as juice clarification and dairy product concentration in the food and beverage industry; protein purification and vaccine production in the biopharmaceutical industry; catalyst recovery and oil-water separation in the chemical and petrochemical industry; and lithium battery electrolyte purification and fuel cell processing in the new energy industry. This makes it a key technology driving industrial production and resource recycling.

[0003] Existing cross-flow filters consist of one or more filter elements integrated into a single pressure vessel, with the length of these elements limited by the device's specifications. When the cross-flow filter has a large length-to-diameter ratio, the increased length of the filter elements extends the flow path of the raw material slurry. This leads to a greater impact and longer duration of gravity on larger, denser solid particles. As a result, suspended particles in the slurry gradually overcome the drag force of the fluid and settle, significantly increasing the thickness of the retained particles. This, in turn, increases the frictional resistance of the feed flow and degrades the filtration flux of the membrane. Furthermore, filtration and backflushing cannot be performed simultaneously in integrated cross-flow filters. When the filtration pressure differential exceeds a certain limit, the filtration process must be interrupted, and backflushing must be completed before filtration can resume. This interruption negatively impacts production efficiency, product quality, and safety.

[0004] Therefore, integrated cross-flow filters with longer filter elements suffer from problems such as easy clogging of the filter membrane tube and low operational flexibility, making them unsuitable for production scenarios with high continuous requirements. Utility Model Content

[0005] The purpose of this invention is to provide a vertical double-row series cross-flow filter that can achieve independent combined operation of the cross-flow filter through redundant connection of filter units and design of control elements, thereby solving the technical problems of easy clogging of filter membrane tubes, low operational flexibility and filtration interruption in integrated cross-flow filters.

[0006] The technical solution provided by this utility model is as follows:

[0007] A vertical double-row series cross-flow filter includes a pressure-resistant cylinder assembly, a filter element assembly, a filtrate connecting pipe assembly, and a backflush connecting pipe assembly;

[0008] The pressure-resistant cylinder assembly includes multiple pressure-resistant cylinders and flange connectors. The pressure-resistant cylinders are arranged in a double-row vertical arrangement. The flange connectors are connected in series with two adjacent pressure-resistant cylinders. Each pressure-resistant cylinder has a filter liquid outlet and a backflush air inlet at an axial position on its side.

[0009] The filter element assembly is vertically installed inside the pressure-resistant cylinder, dividing the internal space of the pressure-resistant cylinder into an inner cavity and an outer cavity;

[0010] The filtrate connecting pipe assembly is connected to the filtrate outlet and is used to transport the filtrate produced by filtration.

[0011] The backflush connecting pipe assembly is connected to the backflush gas inlet and is used to input the backflush medium, the flow direction of which is opposite to the filtration direction.

[0012] Furthermore, the number of pressure-resistant cylinders is 2N, and all the pressure-resistant cylinders are arranged in a matrix of two columns and N rows. The bottom port of the first pressure-resistant cylinder is provided with a feed inlet, and the bottom port of the 2Nth pressure-resistant cylinder is provided with a concentrate outlet.

[0013] The number of flanges is 2N-1, and the flanges are used to connect all the pressure-resistant cylinders in series.

[0014] Where N≥2.

[0015] Furthermore, the filter element assembly includes a filter element, a flange end cap, and a sealing component. The flange end cap is connected to both ends of the filter element. The outer diameter of the flange end cap matches the inner diameter of the pressure-resistant cylinder. A groove is provided on the side of the flange end cap, and the sealing component is embedded in the groove.

[0016] Furthermore, the structure of the filtrate connecting pipe assembly is the same as that of the backflush connecting pipe assembly. The filtrate connecting pipe assembly includes N four-way fittings, filtrate branch pipes, and filtrate main pipe. The radial ports of the four-way fittings are connected to the filtrate outlet to form 2N filtrate branch pipes, and the axial ports of the four-way fittings are connected to form the filtrate main pipe.

[0017] Furthermore, the filtrate outlet and the backflush air inlet, which are axially located on the same side of the pressure-resistant cylinder, are in symmetrical positions, and the port shape, size, and connection structure of the filtrate outlet and the backflush air inlet are mutually compatible.

[0018] Furthermore, the filter fluid connecting pipe assembly also includes valves, pipe caps, and flanges. Each of the filter fluid branch pipes is controlled by an independent valve. The pipe cap is used to seal the end of the main filter fluid pipeline, and the flange is connected to the outlet end of the main filter fluid pipeline.

[0019] Furthermore, it also includes a filter bracket, which includes a base plate, a support frame, a support plate, and a U-shaped nut. The base plate is used to support the support frame, which is a strip steel column frame structure. The support plate is fixed to the support frame, and the U-shaped nut surrounds the outer wall of the pressure-resistant cylinder. Both ends of the U-shaped nut are connected to the support plate by bolts.

[0020] Furthermore, each of the pressure-resistant cylinders is provided with a support ring on its outer wall surface. The support ring is fixedly connected around the cylinder in the circumference. The connection position of the support ring is located in the middle of the pressure-resistant cylinder or in the stress concentration area. The support ring provides a support structure for the support frame.

[0021] Furthermore, the flange connection includes a first type of flange connection and a second type of flange connection, wherein the first type of flange connection is used to connect the pressure-resistant cylinders in the same row, and the second type of flange connection is used to connect the pressure-resistant cylinders in symmetrical rows.

[0022] Furthermore, the first type of flange connection is connected in series with the pressure-resistant cylinder in an alternating inverted U-shape and U-shape manner, and the remaining flange ports of the first and second rows of pressure-resistant cylinders are connected across columns by the second type of flange connection, and the remaining flange ports of the first and second rows of pressure-resistant cylinders are symmetrically distributed.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. The cross-flow filter used in this utility model is arranged in two vertical symmetrical rows. The raw material slurry forms a stable cross-cylinder material transport by alternating flow of inverted U-shaped siphon lifting and U-shaped vertical falling, which avoids the problem of solid particles easily accumulating in the filter membrane layer, thereby increasing the filtration balance flux of the membrane layer and improving the filtration efficiency of the membrane layer.

[0025] 2. Each filter outlet pipeline and backflush air inlet pipeline of this utility model vertical double-row series cross-flow filter is equipped with a valve. The opening and closing of the branch valves of the filter connecting pipe group can realize the use of a single pressure-resistant cylinder or the combined use of multiple pressure-resistant cylinders, which increases the flexibility of system operation. The opening and closing of the branch valves of the backflush connecting pipe group can ensure that backflushing of the pressure-resistant cylinders of individual branches will not affect the normal operation of other branches and the entire filtration system.

[0026] 3. The vertical double-row series cross-flow filter of this utility model has its filtrate outlet and backflush air inlet symmetrically distributed. Through the axial alignment design of the four-way pipe fitting, the integrated connection of multiple rows of pressure-resistant cylinders to the main pipeline for transmission is realized, which improves the system space utilization and fluid transmission efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the vertical double-row series cross-flow filter structure in an embodiment of this utility model;

[0028] Figure 2 yes Figure 1 Bottom top view (with valve);

[0029] Figure 3 This is a schematic diagram of a single pressure-resistant cylinder and filter element assembly.

[0030] The attached figures are labeled as follows:

[0031] 1-Pressure-resistant cylinder, 2-Flange connector, 3-Support ring, 4-Inlet, 5-Concentrate outlet, 6-Filtrate outlet, 7-Backflush air inlet, 8-Filter element, 9-Flange end cap, 10-Sealing component, 11-Four-way fitting, 12-Valve, 13-Pipe cap, 14-Flange, 15-Filtrate branch pipe, 16-Filtrate main pipe, 17-Backflush branch pipe, 18-Backflush main pipe, 19-Bottom plate, 20-Support frame, 21-Support plate, 22-U-nut. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Please see Figures 1-3 This utility model provides a vertical double-row series cross-flow filter, the main body of which includes a pressure-resistant cylinder assembly, a filter element assembly, a filtrate connecting pipe assembly, a backflush connecting pipe assembly, and a filter support.

[0037] The pressure-resistant cylinder assembly includes a pressure-resistant cylinder 1, a flange connector 2, and a support ring 3. The number of pressure-resistant cylinders 1 shown is 2N, and in this embodiment, N=3, with 6 pressure-resistant cylinders arranged in a matrix of two columns and three rows vertically. Each pressure-resistant cylinder has flanges connected to its upper and lower bottom surfaces. The flange interface on the lower bottom surface of the first cylinder corresponds to the feed inlet 4 of the raw material slurry, and the flange interface on the lower bottom surface of the sixth cylinder serves as the concentrate outlet 5.

[0038] Six pressure-resistant cylinders are connected by flange connectors 3, totaling five 3 connectors: four Class I flange connectors and one Class II flange connector. The four Class I flange connectors are divided into two groups, each group connecting the flanges at both ends of three pressure-resistant cylinders in the same row using an inverted U-shape and a U-shape. The one Class II flange connector connects to the top flange interfaces of two pressure-resistant cylinders in the third row, with the top flange interfaces of the two pressure-resistant cylinders in the third row being symmetrically distributed. The connection of the flange connectors 3 enables a stable cross-cylinder material transfer of the raw material slurry through an alternating flow pattern of inverted U-shaped siphon lifting and U-shaped vertical descent.

[0039] like Figure 3 As shown, the filter element assembly is vertically installed inside each pressure-resistant cylinder 1, with the filter element 8 as its core. The filter element 8 can be a sintered metal membrane tube, a ceramic membrane tube, a polytetrafluoroethylene membrane tube, or a metal-ceramic composite membrane tube. Flange end caps 9 are connected to the upper and lower ends of the filter element 8, and the outer diameter of the flange end caps 9 matches the inner diameter of the pressure-resistant cylinder 1. Sealing components 10 (such as O-rings) are embedded in the grooves on the side of the flange end caps 9, ensuring that the filter assembly is tightly packed into the pressure-resistant cylinder 1 and effectively preventing media leakage. The number of holes in the flange end caps 9 is the same as the number of filter elements 8, and the corresponding holes at the upper and lower ends of the flange end caps 9 connect the feed inlet 4 of the raw material slurry to the outlet 5 of the concentrate.

[0040] The filtrate connecting pipe assembly includes three four-way fittings 11, filtrate branch pipes 15, a filtrate main pipe 16, six valves, a cap 13, and a flange 14. The radial ports of the four-way fittings 11 connect to the filtrate outlets 6 symmetrically distributed on the sides of the two rows of three pressure-resistant cylinders, forming six filtrate branch pipes. The axial ports of the four-way fittings 11 converge to form the filtrate main pipe 16. The six valves are respectively located on the six filtrate branch pipes 15. The cap 13 is used to seal the end of the filtrate main pipe 16. The flange 14 is connected to the outlet end of the filtrate main pipe 16. The backflush connecting pipe assembly has the same composition and connection method as the filtrate connecting pipe assembly, the difference being that the pipe names are backflush branch pipe 17 and backflush main pipe 18, respectively.

[0041] Each pressure-resistant cylinder 1 has a filter outlet 6 and a backflush air inlet 7 running through its axial position on the same side from top to bottom, totaling six filter outlets 6 and six backflush air inlets 7. Specifically, the filter outlets 6 and backflush air inlets 7 of the two rows of pressure-resistant cylinders 1 are mirror-distributed at the same horizontal level, and are connected radially by six four-way fittings 11 to form six filter branch pipes 15 and six backflush branch pipes 17, respectively. The axial ports of the four-way fittings 11 are connected to form a filter main pipe 16 and a backflush main pipe 18. The ends of the filter main pipe 16 and the backflush main pipe 18 are respectively connected to pipe caps 13 to seal these pipe ends, and the beginning ends of both are connected to flanges 14 to facilitate the connection of subsequent piping systems. Valves 12 are divided into first valves and second valves, with six of each. The first valves are installed in the six filter branch pipes 15 to regulate the number of filters in operation and the filter flow rate. When only two pressure-resistant cylinders 6 are in operation, simply open the first valve of the valve 12 corresponding to the filtrate branch pipe 15 of the two interconnected pressure-resistant cylinders 6, and control the filtrate flow rate by adjusting the opening degree of the first valve 12. The second valve is installed on the six backflush branch pipes 17 to control the backflush target and backflush cycle. When backflushing a particular pressure-resistant cylinder 6, close the first valve of the valve 12 corresponding to the filtrate branch pipe 15 of that pressure-resistant cylinder 6, and open the second valve of the valve 12 on the backflush branch pipe 17 of that pressure-resistant cylinder 6, without interrupting the filtration operation of the other pressure-resistant cylinders 6.

[0042] The entire vertical double-row tandem cross-flow filter unit is fixed to the filter bracket. The base plate 19 has pre-drilled mounting bolt holes and is welded to the columns and beams made of channel steel or angle steel to form an integrated support frame 20. The beams of the support frame 20 support the backflush branch pipe 17 and the support rings 3 on the outer wall of the pressure-resistant cylinder 1. Support plates 21 extend longitudinally from the columns of the support frame 20 along the center line of every two pressure-resistant cylinders 1 in the same row, and are then secured to the outer wall of each pressure-resistant cylinder 1 by U-nuts 22, fastening them to the holes on the plate surface of the support plate 21 to prevent displacement or shaking during filtration due to liquid impact, vibration, or other factors.

[0043] The working process of the vertical double-row series cross-flow filter provided by this utility model is as follows: The filter material enters each pressure-resistant cylinder 1 sequentially through the feed inlet 4 of the raw material slurry in an alternating flow pattern of inverted U-shaped siphon lifting and U-shaped vertical falling. Under pressure, the small molecules of the raw material slurry horizontally permeate the membrane pores on the surface of the filter element 8 and are collected through the filtrate outlet 6 to each filtrate branch pipe 15. The flow rate of the filtrate is controlled by adjusting the opening of the first valve of the regulating valve 12. The flowing filtrate is collected in the main filtrate pipe 16 to begin the next stage of transportation. The solid particles of the raw material slurry are trapped inside the membrane tube by the filter element 8 to form a dynamic filter cake layer. As the raw material slurry is continuously input, the trapped solid particles gradually accumulate to form a concentrate, which is discharged from the concentrate outlet 5. When the filtration pressure difference of a certain pressure-resistant cylinder 1 reaches the set value, the collection of filtrate from that pressure-resistant cylinder 1 is stopped. Backflush medium is input through the backflush main pipe 18 and diverted to the backflush branch pipe 17 corresponding to the pressure-resistant cylinder 1. By controlling the opening and closing of the second valve of the control valve 12, the pressure-resistant cylinder 1 is backflushed in a targeted manner. The backflush medium flows in the opposite direction to the cross-flow filtration, and strongly washes the filter element 8 to separate the membrane layer and pores. The detached solid particles are discharged from the concentrate outlet 5 with the backflush medium.

[0044] 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 vertical double-row series cross-flow filter, characterized in that: Includes pressure-resistant cylinder assembly, filter element assembly, filtrate connecting pipe assembly, and backflush connecting pipe assembly; The pressure-resistant cylinder assembly includes multiple pressure-resistant cylinders and flange connectors. The pressure-resistant cylinders are arranged in a double-row vertical arrangement. The flange connectors are connected in series with two adjacent pressure-resistant cylinders. Each pressure-resistant cylinder has a filter liquid outlet and a backflush air inlet at an axial position on its side. The filter element assembly is vertically installed inside the pressure-resistant cylinder, dividing the internal space of the pressure-resistant cylinder into an inner cavity and an outer cavity; The filtrate connecting pipe assembly is connected to the filtrate outlet and is used to transport the filtrate produced by filtration. The backflush connecting pipe assembly is connected to the backflush gas inlet and is used to input the backflush medium, the flow direction of which is opposite to the filtration direction.

2. The vertical double-row series cross-flow filter according to claim 1, characterized in that: The number of pressure-resistant cylinders is 2N, and all the pressure-resistant cylinders are arranged in a matrix of two columns and N rows. The bottom port of the first pressure-resistant cylinder is provided with a feed inlet, and the bottom port of the 2Nth pressure-resistant cylinder is provided with a concentrate outlet. The number of flanges is 2N-1, and the flanges are used to connect all the pressure-resistant cylinders in series. Where N≥2.

3. The vertical double-row series cross-flow filter according to claim 1, characterized in that: The filter element assembly includes a filter element, flange end caps, and sealing components. The flange end caps are connected to both ends of the filter element. The outer diameter of the flange end caps matches the inner diameter of the pressure-resistant cylinder. The side of the flange end caps is provided with a groove, and the sealing components are embedded in the groove.

4. The vertical double-row series cross-flow filter according to claim 1, characterized in that: The structure of the filtrate connecting pipe assembly is the same as that of the backflush connecting pipe assembly. The filtrate connecting pipe assembly includes N four-way fittings, filtrate branch pipes and filtrate main pipe. The radial ports of the four-way fittings are connected to the filtrate outlet to form 2N filtrate branch pipes. The axial ports of the four-way fittings are connected to form the filtrate main pipe.

5. The vertical double-row series cross-flow filter according to claim 1, characterized in that: The filtrate outlet and backflush air inlet, which are axially located on the same side of the pressure-resistant cylinder, are symmetrically positioned, and the port shape, size, and connection structure of the filtrate outlet and the backflush air inlet are mutually compatible.

6. The vertical double-row series cross-flow filter according to claim 4, characterized in that: The filtrate connecting pipe assembly also includes valves, caps, and flanges. Each filtrate branch pipe is controlled by an independent valve. The cap is used to seal the end of the main filtrate pipeline, and the flange is connected to the outlet end of the main filtrate pipeline.

7. The vertical double-row series cross-flow filter according to any one of claims 1-6, characterized in that: It also includes a filter bracket, which includes a base plate, a support frame, a support plate, and a U-shaped nut. The base plate is used to support the support frame, which is a strip steel column frame structure. The support plate is fixed to the support frame. The U-shaped nut surrounds the outer wall of the pressure-resistant cylinder, and both ends of the U-shaped nut are connected to the support plate by bolts.

8. The vertical double-row series cross-flow filter according to claim 7, characterized in that: Each of the pressure-resistant cylinders is provided with a support ring on its outer wall surface. The support ring is fixedly connected around the cylinder in the circumference. The connection position of the support ring is located in the middle of the pressure-resistant cylinder or in the stress concentration area. The support ring provides a support structure for the support frame.

9. The vertical double-row series cross-flow filter according to claim 2, characterized in that: The flange connection includes a first type of flange connection and a second type of flange connection. The first type of flange connection is used to connect the pressure-resistant cylinders in the same row, and the second type of flange connection is used to connect the pressure-resistant cylinders in symmetrical rows.

10. The vertical double-row series cross-flow filter according to claim 9, characterized in that: The first type of flange connection is connected in series with the pressure-resistant cylinder in an alternating inverted U-shape and U-shape, and then the remaining flange ports of the first and second rows of pressure-resistant cylinders are connected across columns by the second type of flange connection, and the remaining flange ports of the first and second rows of pressure-resistant cylinders are symmetrically distributed.

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