Column type hollow fiber membrane assembly with replaceable filter element

Abstract

The utility model relates to a column type hollow fiber membrane component with a replaceable filter element, which comprises end sockets, an end cover ring, a tubular column, the filter element, a hoop, a connecting pipe plug and a pressing joint, the upper end and the lower end of the tubular column are respectively provided with an end socket and a second end socket, and the lower side of the end socket at the upper end is provided with the end cover ring on the outer wall of the tubular column. A second end cover ring is arranged on the upper side of the second end socket at the lower end and located on the outer wall of the tubular column, and a rectangular end socket sealing ring is arranged at the joint of each end socket and the corresponding end cover ring. Special gas distribution holes are additionally formed in the water inlet and distribution frame of the filter element, so that uniform gas distribution in the gas washing process of the membrane component is ensured, and the service life of the filter element can be prolonged by gas washing. A pouring rod is designed on a resin fixing layer at the water inlet end of the filter element, and special water distribution holes are formed in the pouring rod after demolding, so that uniform water inlet in the membrane assembly is ensured. And special concentrated water distribution holes are formed in the produced water distribution frame, so that concentrated water is uniformly guided out, the phenomenon of local concentration polarization is not easy to form, and the service life of the membrane component is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of water treatment, in particular to a columnar hollow fiber membrane component with a replaceable filter element. Background Art

[0002] Membrane separation technology has the functions of separation, concentration, purification and refinement, and has the characteristics of high efficiency, energy saving, environmental protection, molecular filtration, simple filtration process and easy control. Therefore, it has been widely used in food, medicine, biology, environmental protection, chemical industry, metallurgy, energy, petroleum, water treatment, electronics and other fields, and has become one of the most important means in today's separation science. As a form of assembly of separation membrane, hollow fiber column membrane assembly can maximize the use area of ​​separation membrane, and can be backwashed and cross-flow filtration to significantly extend the operating life of membrane assembly. However, due to the combined influence of various factors in water treatment applications, membrane fouling problems are inevitable, causing membrane assembly fouling and affecting the filtration efficiency and service life of membrane assembly. Therefore, how to reduce membrane fouling, improve the anti-fouling and clogging of membrane assembly, increase the filtration efficiency of membrane assembly, extend the service life of membrane assembly, improve the uniformity of hydraulic distribution in membrane assembly, increase air washing of membrane assembly, optimize the structural design of filter element and operation control program, etc. are increasingly attracting attention.

[0003] Existing column membrane components generally have two structural forms: a replaceable filter element type and an integrated type.

[0004] The integrated structure means that the water production end and the water inlet end of the membrane assembly are fixed together with the membrane shell through the end-capping resin. However, due to the differences in the structures of the membrane assemblies, the roots of the membrane fibers often lack the protective layer of glue, and the roots are prone to breakage, affecting the filtration effect of the membrane assembly and the quality of the produced water. In addition, after the membrane assembly is blocked due to fouling during use, there is no way to observe, study and judge the fouling of the membrane fibers inside the membrane assembly, and propose specific targeted solutions. Finally, after the membrane assembly fails during use, the entire membrane assembly (including the membrane shell) needs to be replaced, and the replacement cost is significantly higher than the cost of replacing the filter element.

[0005] The replaceable structure means that the membrane assembly filter element can be disassembled and replaced. The filter element generally has two structural forms: one is double-end casting, that is, it has a water-producing end resin fixing layer and a water-inlet end resin fixing layer, and at least one end is open; the other is a U-shaped single-end opening casting to form a water-producing end resin fixing layer. The U-shaped single-end casting filter element has a long internal membrane filament and is not fixed at the tail end. Under the action of water flow, it is easy to cause the membrane filament to clumping and block the membrane shell, affecting the discharge of concentrated water, increasing local concentration polarization, and thus reducing the service life of the membrane assembly. In addition, the membrane filaments are bent into a ball inside the membrane shell, resulting in a shortened membrane filament life.

[0006] Therefore, those skilled in the art provide a column-type hollow fiber membrane module with a replaceable filter element to solve the problems raised in the above background technology. Summary of the invention

[0007] The purpose of the utility model is to provide a columnar hollow fiber membrane component with a replaceable filter element to solve the problems raised in the above background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A columnar hollow fiber membrane component with a replaceable filter element, comprising a head, an end cover ring, a pipe column, a filter element, a clamp, a connecting pipe plug and a compression joint, wherein the upper and lower ends of the pipe column are respectively provided with a head and a second head, the lower side of the upper head is located on the outer wall of the pipe column and an end cover ring is provided, the upper side of the lower end head second is located on the outer wall of the pipe column and an end cover ring second is provided, the head and the end cover ring are fixed by a clamp, the clamp is fixedly connected by a clamp screw, a head rectangular sealing ring is provided at the connection between the head and the end cover ring; the second head and the second end cover ring are fixed by a second clamp; the connection between the second head and the second end cover ring is provided with a second rectangular sealing ring of the head.

[0010] As a further solution of the utility model: a connecting pipe plug and a second connecting pipe plug are respectively provided at the upper and lower ends of the middle of the pipe column, a concentrated water outlet is provided in the upper connecting pipe plug, a compression joint is provided between the upper end of the connecting pipe plug and the head, and a pipe plug rectangular sealing ring is provided at the connection between the connecting pipe plug and the head, and a pipe plug O-type seal is provided at the connection between the lower end of the connecting pipe plug and the inner wall of the pipe column.

[0011] As a further solution of the utility model: a second compression joint is arranged between the upper end of the second connecting pipe plug and the second head; a water distribution rack is arranged at the upper end of the interior of the pipe column, and concentrated water distribution holes are arranged on the water distribution rack, and end-sealing glue and protective glue are arranged on the inner side of the water distribution rack, and two O-rings are arranged between the water distribution rack and the inner wall of the pipe column.

[0012] As a further solution of the utility model: a water outlet is arranged on the right side of the head; a filter element is arranged in the middle of the pipe column, a central tube is arranged in the middle of the filter element, and membrane filaments are arranged on the outside of the central tube.

[0013] As a further solution of the utility model: a water inlet distribution rack is arranged at the lower end of the pipe column, air distribution holes are arranged on the water inlet distribution rack, a casting rod is arranged on the inner side of the water inlet distribution rack, an air inlet is arranged on the lower side of the connecting pipe plug 2, and a water inlet is arranged on the right side of the second head.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] Since the filter element of the utility model is assembled into the membrane shell after the external pre-casting is completed, the root of the filter element can be cast for the second time to protect the root of the membrane filaments from breaking during use. Special air distribution holes are added to the water distribution rack of the filter element to ensure uniform gas distribution during the air washing process of the membrane assembly. Air washing can extend the service life of the filter element. The resin fixing layer at the water inlet end of the filter element is designed with a casting rod. After demoulding, the casting rod forms a special water distribution hole to ensure uniform water inflow inside the membrane assembly. Special concentrated water distribution holes are provided on the water distribution rack to ensure uniform concentrated water discharge, and local concentration polarization is not easily formed, thereby extending the service life of the membrane assembly. The detachability of the filter element can study and judge the pollution of the membrane filaments and propose targeted pollution solutions. The replaceability of the filter element reduces the replacement cost of the membrane assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the structure of a columnar hollow fiber membrane assembly with a replaceable filter element.

[0017] Figure 2 The present invention is a schematic diagram of the structure of a filter element in a columnar hollow fiber membrane assembly with a replaceable filter element.

[0018] In the figure: head 1, end cover ring 2, pipe column 3, filter element 4, clamp 5, connecting pipe plug 6;

[0019] Compression joint 7, head rectangular sealing ring 8;

[0020] Water outlet 11, concentrated water outlet 12, water inlet 13, air inlet 14;

[0021] Membrane filament 41, central tube 42, produced water distribution rack 43, inlet water distribution rack 44, end-capping glue 45;

[0022] Protective glue 46, O-ring 47, casting rod 48;

[0023] Concentrated water distribution hole 431, air distribution hole 441, clamp screw 51, pipe plug rectangular sealing ring 61, pipe plug O-type seal 62;

[0024] End cover ring 22, head 111, clamp 55, connecting pipe plug 66, compression joint 77, head rectangular sealing ring 88. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1-2 In an embodiment of the utility model, a columnar hollow fiber membrane assembly with a replaceable filter element comprises a head 1, an end cover ring 2, a pipe column 3, a filter element 4, a clamp 5, a connecting pipe plug 6 and a compression joint 7, wherein the upper and lower ends of the pipe column 3 are respectively provided with a head 1 and a second head 111, the lower side of the upper head 1 is located on the outer wall of the pipe column 3 and an end cover ring 2 is provided, and the upper side of the second head 111 at the lower end is located on the outer wall of the pipe column 3 and an end cover ring 22 is provided, the head 1 and the end cover ring 2 are fixed by a clamp 5, and the clamp 5 is fixedly connected by a clamp screw 51, and a head rectangular sealing ring 8 is provided at the connection between the head 1 and the end cover ring 2; the second head 111 and the second end cover ring 22 are fixed by a clamp 2 55; and a head rectangular sealing ring 88 is provided at the connection between the second head 111 and the second end cover ring 22;

[0027] A connecting pipe plug 6 and a second connecting pipe plug 66 are respectively provided at the upper and lower ends of the middle of the pipe column 3. A concentrated water outlet 12 is provided in the upper end of the connecting pipe plug 6. A compression joint 7 is provided between the upper end of the connecting pipe plug 6 and the end cap 1, and a pipe plug rectangular sealing ring 61 is provided at the connection between the connecting pipe plug 6 and the end cap 1. A pipe plug O-type seal 62 is provided at the connection between the lower end of the connecting pipe plug 6 and the inner wall of the pipe column 3; a compression joint 77 is provided between the upper end of the second connecting pipe plug 66 and the second end cap 111;

[0028] A water distribution rack 43 is provided at the upper end of the pipe string 3, and a concentrated water distribution hole 431 is provided on the water distribution rack 43. A sealing glue 45 and a protective glue 46 are provided inside the water distribution rack 43. Two O-rings 47 are provided between the water distribution rack 43 and the inner wall of the pipe string 3.

[0029] A water outlet 11 is provided on the right side of the sealing head 1;

[0030] A filter element 4 is arranged in the middle of the pipe column 3, a central tube 42 is arranged in the middle of the filter element 4, and a membrane wire 41 is arranged outside the central tube 42;

[0031] A water inlet distribution rack 44 is provided at the lower end of the pipe column 3, and an air distribution hole 441 is provided on the water inlet distribution rack 44. A casting rod 48 is provided inside the water inlet distribution rack 44. An air inlet 14 is provided at the lower side of the connecting pipe plug 66, and a water inlet 13 is provided on the right side of the head 111.

[0032] The structural head of the present application includes two head 1 and head 2 111, one water outlet and one water inlet are respectively provided. The end cover ring includes two end cover rings, end cover ring 2 and end cover ring 22, which are respectively bonded to the two ends of the pipe column to form a membrane shell.

[0033] The end cap 1 and the second end cap 111 are bowl-shaped caps. The side of the end cap 1 is provided with a water outlet 11, and the side of the second end cap 111 is provided with a water inlet 13; the top of the end cap 1 is provided with an internal thread opening, and the bottom of the opening is provided with a notch for a pipe plug rectangular sealing ring 61; the end cap 1 is connected to the filter element 4 through a connecting pipe plug 6; the second end cap 111 is also connected in this way.

[0034] A notch for a rectangular sealing ring 8 is provided on the end cover ring 2. One end of the end cover ring 2 is bonded to the pipe column 3, and the other end is connected to the head 1 through a clamp 5. The pipe column 3 is made of PVC-U material, and the thickness of the pipe column 3 is 8-15mm. The two ends of the pipe column 3 are respectively bonded to the end cover ring 2 and the end cover ring 22 to form a membrane shell.

[0035] The filter element 4 includes a membrane filament 41, a central tube 42, a water distribution frame 43, a water distribution frame 44, a sealing glue 45, a protective glue 46, an O-ring 47 and a casting rod 48. The filter element 4 is connected to the head 1 through a connecting pipe plug 6, and the filter element 4 is installed in the mold shell.

[0036] The material of the membrane filament 41 is PVDF, the outer diameter of the membrane filament 41 is 1.0-3.0 mm, the filtration accuracy of the membrane filament 41 is 0.01 micron, and the two ends of the membrane filament 41 are respectively fixed in the water production distribution frame 43 and the water inlet distribution frame 44 by end-capping glue 45; a protective glue 46 is provided at the root of the membrane filament 41, the inner hole of the membrane filament at the end of the water production distribution frame 43 is open, and the inner hole of the membrane filament at the end of the water inlet distribution frame 44 is sealed.

[0037] The central tube 42 is a supporting tube, one end of which is connected to the water inlet distribution frame, and the other end of which is connected to the water production distribution frame.

[0038] The produced water distribution frame 43 is provided with an O-ring 47 notch, a concentrated water distribution hole 431 and a connecting pipe plug 6 interface; the produced water distribution frame 43 is a six-part structure; the produced water distribution frame 43 is fixedly connected to the membrane wire 41 by a sealing glue 45 and a protective glue 46.

[0039] The water inlet distribution frame 44 is provided with air distribution holes 441 and a connection pipe plug 6 interface, and the water inlet distribution frame 44 is a six-part structure. The water inlet distribution frame 44 is fixedly connected with the membrane wire 41 and the casting rod 48 through the end-sealing glue 45 and the protective glue 46.

[0040] The end-sealing glue 45 is made of epoxy resin, hard polyurethane, etc. The end-sealing glue 45 fixes and connects the membrane filament 41 with the water-producing water distribution frame 43, the membrane filament 41 with the water-inlet water distribution frame 44 and the casting rod respectively.

[0041] The protective glue 46 is made of soft polyurethane, silicone, etc. The protective glue 46 is on the end-sealing glue 45 and covers the residue of the end-sealing glue 45 on the root of the membrane filament 41 to ensure that the root of the membrane filament 41 is not broken.

[0042] The O-type sealing ring 47 is made of silica gel or EDMP and is mainly used to isolate the raw water from the produced water.

[0043] The casting rod 48 is fixed together with the membrane filament 41 and the water inlet and water distribution frame 44 under the action of the end-sealing glue, and a water inlet and water distribution hole will be formed after demoulding. There are 6 casting rods 48, which are equally cast in the end-sealing glue 45.

[0044] The clamp 5 and the second clamp 55 include the clamp screw 51. The clamp 5, the second clamp 55 and the clamp screw 51 are all made of stainless steel.

[0045] One end of the connecting pipe plug 6 is a concentrated water outlet 12, and the other end is provided with a notch for a pipe plug O-type sealing ring 62. A circular pressure plate is provided on the connecting pipe plug 6. Two pipe plug O-type sealing rings 62 are installed on the connecting pipe plug 6. The connecting sections of the connecting pipe plug 6 are respectively connected to the head 1 and the filter element 4.

[0046] The pipe insert rectangular seal ring 61 is installed in the pipe insert rectangular seal 61 notch on the end cap 1. Under the tightening action of the compression joint 7, the annular pressure plate on the connecting pipe insert 6 compresses the pipe insert rectangular seal ring 61 to prevent the produced water from leaking.

[0047] The pipe plug O-type sealing ring 62 is installed on the connecting pipe plug 6. The pipe plug O-type sealing ring 62 isolates the concentrated water from the produced water.

[0048] The compression joint 7 is provided with external threads and toothed rotating edges. The compression joint 7 is an annular structure. The compression joint 7 is installed at the internal thread opening at the top of the head 1. By tightening the compression joint 7, the connecting pipe plug 6 is compressed against the pipe plug rectangular sealing ring 61.

[0049] The rectangular sealing ring 8 of the end cap ring 2 is installed in the notch of the rectangular sealing ring 8 of the end cap ring 2. Under the tightening action of the clamp 5, the end cap 1 and the end cap ring 2 press the rectangular sealing ring 8 of the end cap to prevent the entire membrane assembly from leaking.

[0050] Since the filter element of the utility model is assembled into the membrane shell after the external pre-casting is completed, the root of the filter element can be cast for the second time to protect the root of the membrane filaments from breaking during use. Special air distribution holes are added to the water distribution rack of the filter element to ensure uniform gas distribution during the air washing process of the membrane assembly. Air washing can extend the service life of the filter element. The resin fixing layer at the water inlet end of the filter element is designed with a casting rod. After demoulding, the casting rod forms a special water distribution hole to ensure uniform water inflow inside the membrane assembly. Special concentrated water distribution holes are provided on the water distribution rack to ensure uniform concentrated water discharge, and local concentration polarization is not easily formed, thereby extending the service life of the membrane assembly. The detachability of the filter element can study and judge the pollution of the membrane filaments and propose targeted pollution solutions. The replaceability of the filter element reduces the replacement cost of the membrane assembly.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A column type hollow fiber membrane assembly with a replaceable filter element, comprising a head (1), an end cover ring (2), a pipe column (3), a filter element (4), a clamp (5), a connecting pipe insert (6) and a compression joint (7), characterized in that: The upper and lower ends of the pipe column (3) are respectively provided with a head (1) and a second head (111); An end cover ring (2) is arranged on the outer wall of the pipe column (3) at the lower side of the upper end sealing head (1); An end cover ring 2 (22) is arranged on the upper side of the second end cover (111) at the lower end and located on the outer wall of the pipe column (3); The sealing head (1) and the end cover ring (2) are fixed by a clamp (5), and the clamp (5) is fixedly connected by a clamp screw (51), and a sealing head rectangular sealing ring (8) is provided at the connection between the sealing head (1) and the end cover ring (2); A produced water distribution rack (43) is provided at the upper end of the interior of the pipe column (3), a concentrated water distribution hole (431) is provided on the produced water distribution rack (43), a sealing glue (45) and a protective glue (46) are provided on the inner side of the produced water distribution rack (43), and two O-rings (47) are provided at intervals between the produced water distribution rack (43) and the inner wall of the pipe column (3).

2. A columnar hollow fiber membrane assembly with a replaceable filter element according to claim 1, characterized in that: The second sealing head (111) and the second end cover ring (22) are fixed by a second clamp (55); and a second sealing head rectangular sealing ring (88) is provided at the connection between the second sealing head (111) and the second end cover ring (22).

3. The column type hollow fiber membrane assembly with replaceable filter element according to claim 1, characterized in that: A connecting pipe plug (6) and a second connecting pipe plug (66) are respectively provided at the upper and lower ends of the middle of the pipe column (3); a concentrated water outlet (12) is provided in the connecting pipe plug (6) at the upper end; a compression joint (7) is provided between the upper end of the connecting pipe plug (6) and the sealing head (1); a pipe plug rectangular sealing ring (61) is provided at the connection between the connecting pipe plug (6) and the sealing head (1); and a pipe plug O-type seal (62) is provided at the connection between the lower end of the connecting pipe plug (6) and the inner wall of the pipe column (3).

4. The column type hollow fiber membrane assembly with replaceable filter element according to claim 3, characterized in that: A second compression joint (77) is provided between the upper end of the second connecting pipe insert (66) and the second sealing head (111).

5. The column type hollow fiber membrane assembly with replaceable filter element according to claim 1, characterized in that: The right side of the sealing head (1) is provided with a water outlet (11), and the right side of the second sealing head (111) is provided with a water inlet (13).

6. The column type hollow fiber membrane assembly with replaceable filter element according to claim 1, characterized in that: A filter element (4) is arranged in the middle of the column (3), a central tube (42) is arranged in the middle of the filter element (4), and a membrane thread (41) is arranged on the outside of the central tube (42).

7. The column type hollow fiber membrane assembly with replaceable filter element according to claim 1, characterized in that: A water inlet and water distribution frame (44) is provided at the lower end of the pipe column (3), air distribution holes (441) are provided on the water inlet and water distribution frame (44), and a casting rod (48) is provided inside the water inlet and water distribution frame (44).

8. The column type hollow fiber membrane assembly with replaceable filter element according to claim 3, characterized in that: An air inlet (14) is provided on the lower side of the connecting pipe insert (66).

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